80#endif
81#endif /* not lint */
82#endif
83
84/*-
85 * parse.c --
86 * Functions to parse a makefile.
87 *
88 * One function, Parse_Init, must be called before any functions
89 * in this module are used. After that, the function Parse_File is the
90 * main entry point and controls most of the other functions in this
91 * module.
92 *
93 * Most important structures are kept in Lsts. Directories for
94 * the .include "..." function are kept in the 'parseIncPath' Lst, while
95 * those for the .include <...> are kept in the 'sysIncPath' Lst. The
96 * targets currently being defined are kept in the 'targets' Lst.
97 *
98 * The variables 'fname' and 'lineno' are used to track the name
99 * of the current file and the line number in that file so that error
100 * messages can be more meaningful.
101 *
102 * Interface:
103 * Parse_Init Initialization function which must be
104 * called before anything else in this module
105 * is used.
106 *
107 * Parse_End Cleanup the module
108 *
109 * Parse_File Function used to parse a makefile. It must
110 * be given the name of the file, which should
111 * already have been opened, and a function
112 * to call to read a character from the file.
113 *
114 * Parse_IsVar Returns TRUE if the given line is a
115 * variable assignment. Used by MainParseArgs
116 * to determine if an argument is a target
117 * or a variable assignment. Used internally
118 * for pretty much the same thing...
119 *
120 * Parse_Error Function called when an error occurs in
121 * parsing. Used by the variable and
122 * conditional modules.
123 * Parse_MainName Returns a Lst of the main target to create.
124 */
125
126#include <sys/types.h>
127#include <sys/stat.h>
128#include <assert.h>
129#include <ctype.h>
130#include <errno.h>
131#include <fcntl.h>
132#include <stdarg.h>
133#include <stdio.h>
134
135#include "make.h"
136#include "hash.h"
137#include "dir.h"
138#include "job.h"
139#include "buf.h"
140#include "pathnames.h"
141
142#ifdef HAVE_MMAP
143#include <sys/mman.h>
144
145#ifndef MAP_COPY
146#define MAP_COPY MAP_PRIVATE
147#endif
148#ifndef MAP_FILE
149#define MAP_FILE 0
150#endif
151#endif
152
153////////////////////////////////////////////////////////////
154// types and constants
155
156/*
157 * Structure for a file being read ("included file")
158 */
159typedef struct IFile {
160 const char *fname; /* name of file */
161 int lineno; /* current line number in file */
162 int first_lineno; /* line number of start of text */
163 int cond_depth; /* 'if' nesting when file opened */
164 char *P_str; /* point to base of string buffer */
165 char *P_ptr; /* point to next char of string buffer */
166 char *P_end; /* point to the end of string buffer */
167 char *(*nextbuf)(void *, size_t *); /* Function to get more data */
168 void *nextbuf_arg; /* Opaque arg for nextbuf() */
169 struct loadedfile *lf; /* loadedfile object, if any */
170} IFile;
171
172
173/*
174 * These values are returned by ParseEOF to tell Parse_File whether to
175 * CONTINUE parsing, i.e. it had only reached the end of an include file,
176 * or if it's DONE.
177 */
178#define CONTINUE 1
179#define DONE 0
180
181/*
182 * Tokens for target attributes
183 */
184typedef enum {
185 Begin, /* .BEGIN */
186 Default, /* .DEFAULT */
187 End, /* .END */
188 dotError, /* .ERROR */
189 Ignore, /* .IGNORE */
190 Includes, /* .INCLUDES */
191 Interrupt, /* .INTERRUPT */
192 Libs, /* .LIBS */
193 Meta, /* .META */
194 MFlags, /* .MFLAGS or .MAKEFLAGS */
195 Main, /* .MAIN and we don't have anything user-specified to
196 * make */
197 NoExport, /* .NOEXPORT */
198 NoMeta, /* .NOMETA */
199 NoMetaCmp, /* .NOMETA_CMP */
200 NoPath, /* .NOPATH */
201 Not, /* Not special */
202 NotParallel, /* .NOTPARALLEL */
203 Null, /* .NULL */
204 ExObjdir, /* .OBJDIR */
205 Order, /* .ORDER */
206 Parallel, /* .PARALLEL */
207 ExPath, /* .PATH */
208 Phony, /* .PHONY */
209#ifdef POSIX
210 Posix, /* .POSIX */
211#endif
212 Precious, /* .PRECIOUS */
213 ExShell, /* .SHELL */
214 Silent, /* .SILENT */
215 SingleShell, /* .SINGLESHELL */
216 Suffixes, /* .SUFFIXES */
217 Wait, /* .WAIT */
218 Attribute /* Generic attribute */
219} ParseSpecial;
220
221/*
222 * Other tokens
223 */
224#define LPAREN '('
225#define RPAREN ')'
226
227
228////////////////////////////////////////////////////////////
229// result data
230
231/*
232 * The main target to create. This is the first target on the first
233 * dependency line in the first makefile.
234 */
235static GNode *mainNode;
236
237////////////////////////////////////////////////////////////
238// eval state
239
240/* targets we're working on */
241static Lst targets;
242
243#ifdef CLEANUP
244/* command lines for targets */
245static Lst targCmds;
246#endif
247
248/*
249 * specType contains the SPECial TYPE of the current target. It is
250 * Not if the target is unspecial. If it *is* special, however, the children
251 * are linked as children of the parent but not vice versa. This variable is
252 * set in ParseDoDependency
253 */
254static ParseSpecial specType;
255
256/*
257 * Predecessor node for handling .ORDER. Initialized to NULL when .ORDER
258 * seen, then set to each successive source on the line.
259 */
260static GNode *predecessor;
261
262////////////////////////////////////////////////////////////
263// parser state
264
265/* true if currently in a dependency line or its commands */
266static Boolean inLine;
267
268/* number of fatal errors */
269static int fatals = 0;
270
271/*
272 * Variables for doing includes
273 */
274
275/* current file being read */
276static IFile *curFile;
277
278/* stack of IFiles generated by .includes */
279static Lst includes;
280
281/* include paths (lists of directories) */
282Lst parseIncPath; /* dirs for "..." includes */
283Lst sysIncPath; /* dirs for <...> includes */
284Lst defIncPath; /* default for sysIncPath */
285
286////////////////////////////////////////////////////////////
287// parser tables
288
289/*
290 * The parseKeywords table is searched using binary search when deciding
291 * if a target or source is special. The 'spec' field is the ParseSpecial
292 * type of the keyword ("Not" if the keyword isn't special as a target) while
293 * the 'op' field is the operator to apply to the list of targets if the
294 * keyword is used as a source ("0" if the keyword isn't special as a source)
295 */
296static const struct {
297 const char *name; /* Name of keyword */
298 ParseSpecial spec; /* Type when used as a target */
299 int op; /* Operator when used as a source */
300} parseKeywords[] = {
301{ ".BEGIN", Begin, 0 },
302{ ".DEFAULT", Default, 0 },
303{ ".END", End, 0 },
304{ ".ERROR", dotError, 0 },
305{ ".EXEC", Attribute, OP_EXEC },
306{ ".IGNORE", Ignore, OP_IGNORE },
307{ ".INCLUDES", Includes, 0 },
308{ ".INTERRUPT", Interrupt, 0 },
309{ ".INVISIBLE", Attribute, OP_INVISIBLE },
310{ ".JOIN", Attribute, OP_JOIN },
311{ ".LIBS", Libs, 0 },
312{ ".MADE", Attribute, OP_MADE },
313{ ".MAIN", Main, 0 },
314{ ".MAKE", Attribute, OP_MAKE },
315{ ".MAKEFLAGS", MFlags, 0 },
316{ ".META", Meta, OP_META },
317{ ".MFLAGS", MFlags, 0 },
318{ ".NOMETA", NoMeta, OP_NOMETA },
319{ ".NOMETA_CMP", NoMetaCmp, OP_NOMETA_CMP },
320{ ".NOPATH", NoPath, OP_NOPATH },
321{ ".NOTMAIN", Attribute, OP_NOTMAIN },
322{ ".NOTPARALLEL", NotParallel, 0 },
323{ ".NO_PARALLEL", NotParallel, 0 },
324{ ".NULL", Null, 0 },
325{ ".OBJDIR", ExObjdir, 0 },
326{ ".OPTIONAL", Attribute, OP_OPTIONAL },
327{ ".ORDER", Order, 0 },
328{ ".PARALLEL", Parallel, 0 },
329{ ".PATH", ExPath, 0 },
330{ ".PHONY", Phony, OP_PHONY },
331#ifdef POSIX
332{ ".POSIX", Posix, 0 },
333#endif
334{ ".PRECIOUS", Precious, OP_PRECIOUS },
335{ ".RECURSIVE", Attribute, OP_MAKE },
336{ ".SHELL", ExShell, 0 },
337{ ".SILENT", Silent, OP_SILENT },
338{ ".SINGLESHELL", SingleShell, 0 },
339{ ".SUFFIXES", Suffixes, 0 },
340{ ".USE", Attribute, OP_USE },
341{ ".USEBEFORE", Attribute, OP_USEBEFORE },
342{ ".WAIT", Wait, 0 },
343};
344
345////////////////////////////////////////////////////////////
346// local functions
347
348static int ParseIsEscaped(const char *, const char *);
349static void ParseErrorInternal(const char *, size_t, int, const char *, ...)
| 80#endif
81#endif /* not lint */
82#endif
83
84/*-
85 * parse.c --
86 * Functions to parse a makefile.
87 *
88 * One function, Parse_Init, must be called before any functions
89 * in this module are used. After that, the function Parse_File is the
90 * main entry point and controls most of the other functions in this
91 * module.
92 *
93 * Most important structures are kept in Lsts. Directories for
94 * the .include "..." function are kept in the 'parseIncPath' Lst, while
95 * those for the .include <...> are kept in the 'sysIncPath' Lst. The
96 * targets currently being defined are kept in the 'targets' Lst.
97 *
98 * The variables 'fname' and 'lineno' are used to track the name
99 * of the current file and the line number in that file so that error
100 * messages can be more meaningful.
101 *
102 * Interface:
103 * Parse_Init Initialization function which must be
104 * called before anything else in this module
105 * is used.
106 *
107 * Parse_End Cleanup the module
108 *
109 * Parse_File Function used to parse a makefile. It must
110 * be given the name of the file, which should
111 * already have been opened, and a function
112 * to call to read a character from the file.
113 *
114 * Parse_IsVar Returns TRUE if the given line is a
115 * variable assignment. Used by MainParseArgs
116 * to determine if an argument is a target
117 * or a variable assignment. Used internally
118 * for pretty much the same thing...
119 *
120 * Parse_Error Function called when an error occurs in
121 * parsing. Used by the variable and
122 * conditional modules.
123 * Parse_MainName Returns a Lst of the main target to create.
124 */
125
126#include <sys/types.h>
127#include <sys/stat.h>
128#include <assert.h>
129#include <ctype.h>
130#include <errno.h>
131#include <fcntl.h>
132#include <stdarg.h>
133#include <stdio.h>
134
135#include "make.h"
136#include "hash.h"
137#include "dir.h"
138#include "job.h"
139#include "buf.h"
140#include "pathnames.h"
141
142#ifdef HAVE_MMAP
143#include <sys/mman.h>
144
145#ifndef MAP_COPY
146#define MAP_COPY MAP_PRIVATE
147#endif
148#ifndef MAP_FILE
149#define MAP_FILE 0
150#endif
151#endif
152
153////////////////////////////////////////////////////////////
154// types and constants
155
156/*
157 * Structure for a file being read ("included file")
158 */
159typedef struct IFile {
160 const char *fname; /* name of file */
161 int lineno; /* current line number in file */
162 int first_lineno; /* line number of start of text */
163 int cond_depth; /* 'if' nesting when file opened */
164 char *P_str; /* point to base of string buffer */
165 char *P_ptr; /* point to next char of string buffer */
166 char *P_end; /* point to the end of string buffer */
167 char *(*nextbuf)(void *, size_t *); /* Function to get more data */
168 void *nextbuf_arg; /* Opaque arg for nextbuf() */
169 struct loadedfile *lf; /* loadedfile object, if any */
170} IFile;
171
172
173/*
174 * These values are returned by ParseEOF to tell Parse_File whether to
175 * CONTINUE parsing, i.e. it had only reached the end of an include file,
176 * or if it's DONE.
177 */
178#define CONTINUE 1
179#define DONE 0
180
181/*
182 * Tokens for target attributes
183 */
184typedef enum {
185 Begin, /* .BEGIN */
186 Default, /* .DEFAULT */
187 End, /* .END */
188 dotError, /* .ERROR */
189 Ignore, /* .IGNORE */
190 Includes, /* .INCLUDES */
191 Interrupt, /* .INTERRUPT */
192 Libs, /* .LIBS */
193 Meta, /* .META */
194 MFlags, /* .MFLAGS or .MAKEFLAGS */
195 Main, /* .MAIN and we don't have anything user-specified to
196 * make */
197 NoExport, /* .NOEXPORT */
198 NoMeta, /* .NOMETA */
199 NoMetaCmp, /* .NOMETA_CMP */
200 NoPath, /* .NOPATH */
201 Not, /* Not special */
202 NotParallel, /* .NOTPARALLEL */
203 Null, /* .NULL */
204 ExObjdir, /* .OBJDIR */
205 Order, /* .ORDER */
206 Parallel, /* .PARALLEL */
207 ExPath, /* .PATH */
208 Phony, /* .PHONY */
209#ifdef POSIX
210 Posix, /* .POSIX */
211#endif
212 Precious, /* .PRECIOUS */
213 ExShell, /* .SHELL */
214 Silent, /* .SILENT */
215 SingleShell, /* .SINGLESHELL */
216 Suffixes, /* .SUFFIXES */
217 Wait, /* .WAIT */
218 Attribute /* Generic attribute */
219} ParseSpecial;
220
221/*
222 * Other tokens
223 */
224#define LPAREN '('
225#define RPAREN ')'
226
227
228////////////////////////////////////////////////////////////
229// result data
230
231/*
232 * The main target to create. This is the first target on the first
233 * dependency line in the first makefile.
234 */
235static GNode *mainNode;
236
237////////////////////////////////////////////////////////////
238// eval state
239
240/* targets we're working on */
241static Lst targets;
242
243#ifdef CLEANUP
244/* command lines for targets */
245static Lst targCmds;
246#endif
247
248/*
249 * specType contains the SPECial TYPE of the current target. It is
250 * Not if the target is unspecial. If it *is* special, however, the children
251 * are linked as children of the parent but not vice versa. This variable is
252 * set in ParseDoDependency
253 */
254static ParseSpecial specType;
255
256/*
257 * Predecessor node for handling .ORDER. Initialized to NULL when .ORDER
258 * seen, then set to each successive source on the line.
259 */
260static GNode *predecessor;
261
262////////////////////////////////////////////////////////////
263// parser state
264
265/* true if currently in a dependency line or its commands */
266static Boolean inLine;
267
268/* number of fatal errors */
269static int fatals = 0;
270
271/*
272 * Variables for doing includes
273 */
274
275/* current file being read */
276static IFile *curFile;
277
278/* stack of IFiles generated by .includes */
279static Lst includes;
280
281/* include paths (lists of directories) */
282Lst parseIncPath; /* dirs for "..." includes */
283Lst sysIncPath; /* dirs for <...> includes */
284Lst defIncPath; /* default for sysIncPath */
285
286////////////////////////////////////////////////////////////
287// parser tables
288
289/*
290 * The parseKeywords table is searched using binary search when deciding
291 * if a target or source is special. The 'spec' field is the ParseSpecial
292 * type of the keyword ("Not" if the keyword isn't special as a target) while
293 * the 'op' field is the operator to apply to the list of targets if the
294 * keyword is used as a source ("0" if the keyword isn't special as a source)
295 */
296static const struct {
297 const char *name; /* Name of keyword */
298 ParseSpecial spec; /* Type when used as a target */
299 int op; /* Operator when used as a source */
300} parseKeywords[] = {
301{ ".BEGIN", Begin, 0 },
302{ ".DEFAULT", Default, 0 },
303{ ".END", End, 0 },
304{ ".ERROR", dotError, 0 },
305{ ".EXEC", Attribute, OP_EXEC },
306{ ".IGNORE", Ignore, OP_IGNORE },
307{ ".INCLUDES", Includes, 0 },
308{ ".INTERRUPT", Interrupt, 0 },
309{ ".INVISIBLE", Attribute, OP_INVISIBLE },
310{ ".JOIN", Attribute, OP_JOIN },
311{ ".LIBS", Libs, 0 },
312{ ".MADE", Attribute, OP_MADE },
313{ ".MAIN", Main, 0 },
314{ ".MAKE", Attribute, OP_MAKE },
315{ ".MAKEFLAGS", MFlags, 0 },
316{ ".META", Meta, OP_META },
317{ ".MFLAGS", MFlags, 0 },
318{ ".NOMETA", NoMeta, OP_NOMETA },
319{ ".NOMETA_CMP", NoMetaCmp, OP_NOMETA_CMP },
320{ ".NOPATH", NoPath, OP_NOPATH },
321{ ".NOTMAIN", Attribute, OP_NOTMAIN },
322{ ".NOTPARALLEL", NotParallel, 0 },
323{ ".NO_PARALLEL", NotParallel, 0 },
324{ ".NULL", Null, 0 },
325{ ".OBJDIR", ExObjdir, 0 },
326{ ".OPTIONAL", Attribute, OP_OPTIONAL },
327{ ".ORDER", Order, 0 },
328{ ".PARALLEL", Parallel, 0 },
329{ ".PATH", ExPath, 0 },
330{ ".PHONY", Phony, OP_PHONY },
331#ifdef POSIX
332{ ".POSIX", Posix, 0 },
333#endif
334{ ".PRECIOUS", Precious, OP_PRECIOUS },
335{ ".RECURSIVE", Attribute, OP_MAKE },
336{ ".SHELL", ExShell, 0 },
337{ ".SILENT", Silent, OP_SILENT },
338{ ".SINGLESHELL", SingleShell, 0 },
339{ ".SUFFIXES", Suffixes, 0 },
340{ ".USE", Attribute, OP_USE },
341{ ".USEBEFORE", Attribute, OP_USEBEFORE },
342{ ".WAIT", Wait, 0 },
343};
344
345////////////////////////////////////////////////////////////
346// local functions
347
348static int ParseIsEscaped(const char *, const char *);
349static void ParseErrorInternal(const char *, size_t, int, const char *, ...)
|
353static int ParseFindKeyword(const char *);
354static int ParseLinkSrc(void *, void *);
355static int ParseDoOp(void *, void *);
356static void ParseDoSrc(int, const char *);
357static int ParseFindMain(void *, void *);
358static int ParseAddDir(void *, void *);
359static int ParseClearPath(void *, void *);
360static void ParseDoDependency(char *);
361static int ParseAddCmd(void *, void *);
362static void ParseHasCommands(void *);
363static void ParseDoInclude(char *);
364static void ParseSetParseFile(const char *);
365#ifdef SYSVINCLUDE
366static void ParseTraditionalInclude(char *);
367#endif
368#ifdef GMAKEEXPORT
369static void ParseGmakeExport(char *);
370#endif
371static int ParseEOF(void);
372static char *ParseReadLine(void);
373static void ParseFinishLine(void);
374static void ParseMark(GNode *);
375
376////////////////////////////////////////////////////////////
377// file loader
378
379struct loadedfile {
380 const char *path; /* name, for error reports */
381 char *buf; /* contents buffer */
382 size_t len; /* length of contents */
383 size_t maplen; /* length of mmap area, or 0 */
384 Boolean used; /* XXX: have we used the data yet */
385};
386
387/*
388 * Constructor/destructor for loadedfile
389 */
390static struct loadedfile *
391loadedfile_create(const char *path)
392{
393 struct loadedfile *lf;
394
395 lf = bmake_malloc(sizeof(*lf));
396 lf->path = (path == NULL ? "(stdin)" : path);
397 lf->buf = NULL;
398 lf->len = 0;
399 lf->maplen = 0;
400 lf->used = FALSE;
401 return lf;
402}
403
404static void
405loadedfile_destroy(struct loadedfile *lf)
406{
407 if (lf->buf != NULL) {
408 if (lf->maplen > 0) {
409#ifdef HAVE_MMAP
410 munmap(lf->buf, lf->maplen);
411#endif
412 } else {
413 free(lf->buf);
414 }
415 }
416 free(lf);
417}
418
419/*
420 * nextbuf() operation for loadedfile, as needed by the weird and twisted
421 * logic below. Once that's cleaned up, we can get rid of lf->used...
422 */
423static char *
424loadedfile_nextbuf(void *x, size_t *len)
425{
426 struct loadedfile *lf = x;
427
428 if (lf->used) {
429 return NULL;
430 }
431 lf->used = TRUE;
432 *len = lf->len;
433 return lf->buf;
434}
435
436/*
437 * Try to get the size of a file.
438 */
439static ReturnStatus
440load_getsize(int fd, size_t *ret)
441{
442 struct stat st;
443
444 if (fstat(fd, &st) < 0) {
445 return FAILURE;
446 }
447
448 if (!S_ISREG(st.st_mode)) {
449 return FAILURE;
450 }
451
452 /*
453 * st_size is an off_t, which is 64 bits signed; *ret is
454 * size_t, which might be 32 bits unsigned or 64 bits
455 * unsigned. Rather than being elaborate, just punt on
456 * files that are more than 2^31 bytes. We should never
457 * see a makefile that size in practice...
458 *
459 * While we're at it reject negative sizes too, just in case.
460 */
461 if (st.st_size < 0 || st.st_size > 0x7fffffff) {
462 return FAILURE;
463 }
464
465 *ret = (size_t) st.st_size;
466 return SUCCESS;
467}
468
469/*
470 * Read in a file.
471 *
472 * Until the path search logic can be moved under here instead of
473 * being in the caller in another source file, we need to have the fd
474 * passed in already open. Bleh.
475 *
476 * If the path is NULL use stdin and (to insure against fd leaks)
477 * assert that the caller passed in -1.
478 */
479static struct loadedfile *
480loadfile(const char *path, int fd)
481{
482 struct loadedfile *lf;
483#ifdef HAVE_MMAP
484 long pagesize;
485#endif
486 ssize_t result;
487 size_t bufpos;
488
489 lf = loadedfile_create(path);
490
491 if (path == NULL) {
492 assert(fd == -1);
493 fd = STDIN_FILENO;
494 } else {
495#if 0 /* notyet */
496 fd = open(path, O_RDONLY);
497 if (fd < 0) {
498 ...
499 Error("%s: %s", path, strerror(errno));
500 exit(1);
501 }
502#endif
503 }
504
505#ifdef HAVE_MMAP
506 if (load_getsize(fd, &lf->len) == SUCCESS) {
507 /* found a size, try mmap */
508 pagesize = sysconf(_SC_PAGESIZE);
509 if (pagesize <= 0) {
510 pagesize = 0x1000;
511 }
512 /* round size up to a page */
513 lf->maplen = pagesize * ((lf->len + pagesize - 1)/pagesize);
514
515 /*
516 * XXX hack for dealing with empty files; remove when
517 * we're no longer limited by interfacing to the old
518 * logic elsewhere in this file.
519 */
520 if (lf->maplen == 0) {
521 lf->maplen = pagesize;
522 }
523
524 /*
525 * FUTURE: remove PROT_WRITE when the parser no longer
526 * needs to scribble on the input.
527 */
528 lf->buf = mmap(NULL, lf->maplen, PROT_READ|PROT_WRITE,
529 MAP_FILE|MAP_COPY, fd, 0);
530 if (lf->buf != MAP_FAILED) {
531 /* succeeded */
532 if (lf->len == lf->maplen && lf->buf[lf->len - 1] != '\n') {
533 char *b = malloc(lf->len + 1);
534 b[lf->len] = '\n';
535 memcpy(b, lf->buf, lf->len++);
536 munmap(lf->buf, lf->maplen);
537 lf->maplen = 0;
538 lf->buf = b;
539 }
540 goto done;
541 }
542 }
543#endif
544 /* cannot mmap; load the traditional way */
545
546 lf->maplen = 0;
547 lf->len = 1024;
548 lf->buf = bmake_malloc(lf->len);
549
550 bufpos = 0;
551 while (1) {
552 assert(bufpos <= lf->len);
553 if (bufpos == lf->len) {
554 lf->len *= 2;
555 lf->buf = bmake_realloc(lf->buf, lf->len);
556 }
557 result = read(fd, lf->buf + bufpos, lf->len - bufpos);
558 if (result < 0) {
559 Error("%s: read error: %s", path, strerror(errno));
560 exit(1);
561 }
562 if (result == 0) {
563 break;
564 }
565 bufpos += result;
566 }
567 assert(bufpos <= lf->len);
568 lf->len = bufpos;
569
570 /* truncate malloc region to actual length (maybe not useful) */
571 if (lf->len > 0) {
572 lf->buf = bmake_realloc(lf->buf, lf->len);
573 }
574
575#ifdef HAVE_MMAP
576done:
577#endif
578 if (path != NULL) {
579 close(fd);
580 }
581 return lf;
582}
583
584////////////////////////////////////////////////////////////
585// old code
586
587/*-
588 *----------------------------------------------------------------------
589 * ParseIsEscaped --
590 * Check if the current character is escaped on the current line
591 *
592 * Results:
593 * 0 if the character is not backslash escaped, 1 otherwise
594 *
595 * Side Effects:
596 * None
597 *----------------------------------------------------------------------
598 */
599static int
600ParseIsEscaped(const char *line, const char *c)
601{
602 int active = 0;
603 for (;;) {
604 if (line == c)
605 return active;
606 if (*--c != '\\')
607 return active;
608 active = !active;
609 }
610}
611
612/*-
613 *----------------------------------------------------------------------
614 * ParseFindKeyword --
615 * Look in the table of keywords for one matching the given string.
616 *
617 * Input:
618 * str String to find
619 *
620 * Results:
621 * The index of the keyword, or -1 if it isn't there.
622 *
623 * Side Effects:
624 * None
625 *----------------------------------------------------------------------
626 */
627static int
628ParseFindKeyword(const char *str)
629{
630 int start, end, cur;
631 int diff;
632
633 start = 0;
634 end = (sizeof(parseKeywords)/sizeof(parseKeywords[0])) - 1;
635
636 do {
637 cur = start + ((end - start) / 2);
638 diff = strcmp(str, parseKeywords[cur].name);
639
640 if (diff == 0) {
641 return (cur);
642 } else if (diff < 0) {
643 end = cur - 1;
644 } else {
645 start = cur + 1;
646 }
647 } while (start <= end);
648 return (-1);
649}
650
651/*-
652 * ParseVErrorInternal --
653 * Error message abort function for parsing. Prints out the context
654 * of the error (line number and file) as well as the message with
655 * two optional arguments.
656 *
657 * Results:
658 * None
659 *
660 * Side Effects:
661 * "fatals" is incremented if the level is PARSE_FATAL.
662 */
663/* VARARGS */
664static void
665ParseVErrorInternal(FILE *f, const char *cfname, size_t clineno, int type,
666 const char *fmt, va_list ap)
667{
668 static Boolean fatal_warning_error_printed = FALSE;
669
670 (void)fprintf(f, "%s: ", progname);
671
672 if (cfname != NULL) {
673 (void)fprintf(f, "\"");
674 if (*cfname != '/' && strcmp(cfname, "(stdin)") != 0) {
675 char *cp;
676 const char *dir;
677
678 /*
679 * Nothing is more annoying than not knowing
680 * which Makefile is the culprit.
681 */
682 dir = Var_Value(".PARSEDIR", VAR_GLOBAL, &cp);
683 if (dir == NULL || *dir == '\0' ||
684 (*dir == '.' && dir[1] == '\0'))
685 dir = Var_Value(".CURDIR", VAR_GLOBAL, &cp);
686 if (dir == NULL)
687 dir = ".";
688
689 (void)fprintf(f, "%s/%s", dir, cfname);
690 } else
691 (void)fprintf(f, "%s", cfname);
692
693 (void)fprintf(f, "\" line %d: ", (int)clineno);
694 }
695 if (type == PARSE_WARNING)
696 (void)fprintf(f, "warning: ");
697 (void)vfprintf(f, fmt, ap);
698 (void)fprintf(f, "\n");
699 (void)fflush(f);
700 if (type == PARSE_FATAL || parseWarnFatal)
701 fatals += 1;
702 if (parseWarnFatal && !fatal_warning_error_printed) {
703 Error("parsing warnings being treated as errors");
704 fatal_warning_error_printed = TRUE;
705 }
706}
707
708/*-
709 * ParseErrorInternal --
710 * Error function
711 *
712 * Results:
713 * None
714 *
715 * Side Effects:
716 * None
717 */
718/* VARARGS */
719static void
720ParseErrorInternal(const char *cfname, size_t clineno, int type,
721 const char *fmt, ...)
722{
723 va_list ap;
724
725 va_start(ap, fmt);
726 (void)fflush(stdout);
727 ParseVErrorInternal(stderr, cfname, clineno, type, fmt, ap);
728 va_end(ap);
729
730 if (debug_file != stderr && debug_file != stdout) {
731 va_start(ap, fmt);
732 ParseVErrorInternal(debug_file, cfname, clineno, type, fmt, ap);
733 va_end(ap);
734 }
735}
736
737/*-
738 * Parse_Error --
739 * External interface to ParseErrorInternal; uses the default filename
740 * Line number.
741 *
742 * Results:
743 * None
744 *
745 * Side Effects:
746 * None
747 */
748/* VARARGS */
749void
750Parse_Error(int type, const char *fmt, ...)
751{
752 va_list ap;
753 const char *fname;
754 size_t lineno;
755
756 if (curFile == NULL) {
757 fname = NULL;
758 lineno = 0;
759 } else {
760 fname = curFile->fname;
761 lineno = curFile->lineno;
762 }
763
764 va_start(ap, fmt);
765 (void)fflush(stdout);
766 ParseVErrorInternal(stderr, fname, lineno, type, fmt, ap);
767 va_end(ap);
768
769 if (debug_file != stderr && debug_file != stdout) {
770 va_start(ap, fmt);
771 ParseVErrorInternal(debug_file, fname, lineno, type, fmt, ap);
772 va_end(ap);
773 }
774}
775
776
777/*
778 * ParseMessage
779 * Parse a .info .warning or .error directive
780 *
781 * The input is the line minus the ".". We substitute
782 * variables, print the message and exit(1) (for .error) or just print
783 * a warning if the directive is malformed.
784 */
785static Boolean
786ParseMessage(char *line)
787{
788 int mtype;
789
790 switch(*line) {
791 case 'i':
792 mtype = 0;
793 break;
794 case 'w':
795 mtype = PARSE_WARNING;
796 break;
797 case 'e':
798 mtype = PARSE_FATAL;
799 break;
800 default:
801 Parse_Error(PARSE_WARNING, "invalid syntax: \".%s\"", line);
802 return FALSE;
803 }
804
805 while (isalpha((u_char)*line))
806 line++;
807 if (!isspace((u_char)*line))
808 return FALSE; /* not for us */
809 while (isspace((u_char)*line))
810 line++;
811
812 line = Var_Subst(NULL, line, VAR_CMD, 0);
813 Parse_Error(mtype, "%s", line);
814 free(line);
815
816 if (mtype == PARSE_FATAL) {
817 /* Terminate immediately. */
818 exit(1);
819 }
820 return TRUE;
821}
822
823/*-
824 *---------------------------------------------------------------------
825 * ParseLinkSrc --
826 * Link the parent node to its new child. Used in a Lst_ForEach by
827 * ParseDoDependency. If the specType isn't 'Not', the parent
828 * isn't linked as a parent of the child.
829 *
830 * Input:
831 * pgnp The parent node
832 * cgpn The child node
833 *
834 * Results:
835 * Always = 0
836 *
837 * Side Effects:
838 * New elements are added to the parents list of cgn and the
839 * children list of cgn. the unmade field of pgn is updated
840 * to reflect the additional child.
841 *---------------------------------------------------------------------
842 */
843static int
844ParseLinkSrc(void *pgnp, void *cgnp)
845{
846 GNode *pgn = (GNode *)pgnp;
847 GNode *cgn = (GNode *)cgnp;
848
849 if ((pgn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (pgn->cohorts))
850 pgn = (GNode *)Lst_Datum(Lst_Last(pgn->cohorts));
851 (void)Lst_AtEnd(pgn->children, cgn);
852 if (specType == Not)
853 (void)Lst_AtEnd(cgn->parents, pgn);
854 pgn->unmade += 1;
855 if (DEBUG(PARSE)) {
856 fprintf(debug_file, "# ParseLinkSrc: added child %s - %s\n", pgn->name, cgn->name);
857 Targ_PrintNode(pgn, 0);
858 Targ_PrintNode(cgn, 0);
859 }
860 return (0);
861}
862
863/*-
864 *---------------------------------------------------------------------
865 * ParseDoOp --
866 * Apply the parsed operator to the given target node. Used in a
867 * Lst_ForEach call by ParseDoDependency once all targets have
868 * been found and their operator parsed. If the previous and new
869 * operators are incompatible, a major error is taken.
870 *
871 * Input:
872 * gnp The node to which the operator is to be applied
873 * opp The operator to apply
874 *
875 * Results:
876 * Always 0
877 *
878 * Side Effects:
879 * The type field of the node is altered to reflect any new bits in
880 * the op.
881 *---------------------------------------------------------------------
882 */
883static int
884ParseDoOp(void *gnp, void *opp)
885{
886 GNode *gn = (GNode *)gnp;
887 int op = *(int *)opp;
888 /*
889 * If the dependency mask of the operator and the node don't match and
890 * the node has actually had an operator applied to it before, and
891 * the operator actually has some dependency information in it, complain.
892 */
893 if (((op & OP_OPMASK) != (gn->type & OP_OPMASK)) &&
894 !OP_NOP(gn->type) && !OP_NOP(op))
895 {
896 Parse_Error(PARSE_FATAL, "Inconsistent operator for %s", gn->name);
897 return (1);
898 }
899
900 if ((op == OP_DOUBLEDEP) && ((gn->type & OP_OPMASK) == OP_DOUBLEDEP)) {
901 /*
902 * If the node was the object of a :: operator, we need to create a
903 * new instance of it for the children and commands on this dependency
904 * line. The new instance is placed on the 'cohorts' list of the
905 * initial one (note the initial one is not on its own cohorts list)
906 * and the new instance is linked to all parents of the initial
907 * instance.
908 */
909 GNode *cohort;
910
911 /*
912 * Propagate copied bits to the initial node. They'll be propagated
913 * back to the rest of the cohorts later.
914 */
915 gn->type |= op & ~OP_OPMASK;
916
917 cohort = Targ_FindNode(gn->name, TARG_NOHASH);
918 /*
919 * Make the cohort invisible as well to avoid duplicating it into
920 * other variables. True, parents of this target won't tend to do
921 * anything with their local variables, but better safe than
922 * sorry. (I think this is pointless now, since the relevant list
923 * traversals will no longer see this node anyway. -mycroft)
924 */
925 cohort->type = op | OP_INVISIBLE;
926 (void)Lst_AtEnd(gn->cohorts, cohort);
927 cohort->centurion = gn;
928 gn->unmade_cohorts += 1;
929 snprintf(cohort->cohort_num, sizeof cohort->cohort_num, "#%d",
930 gn->unmade_cohorts);
931 } else {
932 /*
933 * We don't want to nuke any previous flags (whatever they were) so we
934 * just OR the new operator into the old
935 */
936 gn->type |= op;
937 }
938
939 return (0);
940}
941
942/*-
943 *---------------------------------------------------------------------
944 * ParseDoSrc --
945 * Given the name of a source, figure out if it is an attribute
946 * and apply it to the targets if it is. Else decide if there is
947 * some attribute which should be applied *to* the source because
948 * of some special target and apply it if so. Otherwise, make the
949 * source be a child of the targets in the list 'targets'
950 *
951 * Input:
952 * tOp operator (if any) from special targets
953 * src name of the source to handle
954 *
955 * Results:
956 * None
957 *
958 * Side Effects:
959 * Operator bits may be added to the list of targets or to the source.
960 * The targets may have a new source added to their lists of children.
961 *---------------------------------------------------------------------
962 */
963static void
964ParseDoSrc(int tOp, const char *src)
965{
966 GNode *gn = NULL;
967 static int wait_number = 0;
968 char wait_src[16];
969
970 if (*src == '.' && isupper ((unsigned char)src[1])) {
971 int keywd = ParseFindKeyword(src);
972 if (keywd != -1) {
973 int op = parseKeywords[keywd].op;
974 if (op != 0) {
975 Lst_ForEach(targets, ParseDoOp, &op);
976 return;
977 }
978 if (parseKeywords[keywd].spec == Wait) {
979 /*
980 * We add a .WAIT node in the dependency list.
981 * After any dynamic dependencies (and filename globbing)
982 * have happened, it is given a dependency on the each
983 * previous child back to and previous .WAIT node.
984 * The next child won't be scheduled until the .WAIT node
985 * is built.
986 * We give each .WAIT node a unique name (mainly for diag).
987 */
988 snprintf(wait_src, sizeof wait_src, ".WAIT_%u", ++wait_number);
989 gn = Targ_FindNode(wait_src, TARG_NOHASH);
990 gn->type = OP_WAIT | OP_PHONY | OP_DEPENDS | OP_NOTMAIN;
991 Lst_ForEach(targets, ParseLinkSrc, gn);
992 return;
993 }
994 }
995 }
996
997 switch (specType) {
998 case Main:
999 /*
1000 * If we have noted the existence of a .MAIN, it means we need
1001 * to add the sources of said target to the list of things
1002 * to create. The string 'src' is likely to be free, so we
1003 * must make a new copy of it. Note that this will only be
1004 * invoked if the user didn't specify a target on the command
1005 * line. This is to allow #ifmake's to succeed, or something...
1006 */
1007 (void)Lst_AtEnd(create, bmake_strdup(src));
1008 /*
1009 * Add the name to the .TARGETS variable as well, so the user can
1010 * employ that, if desired.
1011 */
1012 Var_Append(".TARGETS", src, VAR_GLOBAL);
1013 return;
1014
1015 case Order:
1016 /*
1017 * Create proper predecessor/successor links between the previous
1018 * source and the current one.
1019 */
1020 gn = Targ_FindNode(src, TARG_CREATE);
1021 if (predecessor != NULL) {
1022 (void)Lst_AtEnd(predecessor->order_succ, gn);
1023 (void)Lst_AtEnd(gn->order_pred, predecessor);
1024 if (DEBUG(PARSE)) {
1025 fprintf(debug_file, "# ParseDoSrc: added Order dependency %s - %s\n",
1026 predecessor->name, gn->name);
1027 Targ_PrintNode(predecessor, 0);
1028 Targ_PrintNode(gn, 0);
1029 }
1030 }
1031 /*
1032 * The current source now becomes the predecessor for the next one.
1033 */
1034 predecessor = gn;
1035 break;
1036
1037 default:
1038 /*
1039 * If the source is not an attribute, we need to find/create
1040 * a node for it. After that we can apply any operator to it
1041 * from a special target or link it to its parents, as
1042 * appropriate.
1043 *
1044 * In the case of a source that was the object of a :: operator,
1045 * the attribute is applied to all of its instances (as kept in
1046 * the 'cohorts' list of the node) or all the cohorts are linked
1047 * to all the targets.
1048 */
1049
1050 /* Find/create the 'src' node and attach to all targets */
1051 gn = Targ_FindNode(src, TARG_CREATE);
1052 if (tOp) {
1053 gn->type |= tOp;
1054 } else {
1055 Lst_ForEach(targets, ParseLinkSrc, gn);
1056 }
1057 break;
1058 }
1059}
1060
1061/*-
1062 *-----------------------------------------------------------------------
1063 * ParseFindMain --
1064 * Find a real target in the list and set it to be the main one.
1065 * Called by ParseDoDependency when a main target hasn't been found
1066 * yet.
1067 *
1068 * Input:
1069 * gnp Node to examine
1070 *
1071 * Results:
1072 * 0 if main not found yet, 1 if it is.
1073 *
1074 * Side Effects:
1075 * mainNode is changed and Targ_SetMain is called.
1076 *
1077 *-----------------------------------------------------------------------
1078 */
1079static int
1080ParseFindMain(void *gnp, void *dummy)
1081{
1082 GNode *gn = (GNode *)gnp;
1083 if ((gn->type & OP_NOTARGET) == 0) {
1084 mainNode = gn;
1085 Targ_SetMain(gn);
1086 return (dummy ? 1 : 1);
1087 } else {
1088 return (dummy ? 0 : 0);
1089 }
1090}
1091
1092/*-
1093 *-----------------------------------------------------------------------
1094 * ParseAddDir --
1095 * Front-end for Dir_AddDir to make sure Lst_ForEach keeps going
1096 *
1097 * Results:
1098 * === 0
1099 *
1100 * Side Effects:
1101 * See Dir_AddDir.
1102 *
1103 *-----------------------------------------------------------------------
1104 */
1105static int
1106ParseAddDir(void *path, void *name)
1107{
1108 (void)Dir_AddDir((Lst) path, (char *)name);
1109 return(0);
1110}
1111
1112/*-
1113 *-----------------------------------------------------------------------
1114 * ParseClearPath --
1115 * Front-end for Dir_ClearPath to make sure Lst_ForEach keeps going
1116 *
1117 * Results:
1118 * === 0
1119 *
1120 * Side Effects:
1121 * See Dir_ClearPath
1122 *
1123 *-----------------------------------------------------------------------
1124 */
1125static int
1126ParseClearPath(void *path, void *dummy)
1127{
1128 Dir_ClearPath((Lst) path);
1129 return(dummy ? 0 : 0);
1130}
1131
1132/*-
1133 *---------------------------------------------------------------------
1134 * ParseDoDependency --
1135 * Parse the dependency line in line.
1136 *
1137 * Input:
1138 * line the line to parse
1139 *
1140 * Results:
1141 * None
1142 *
1143 * Side Effects:
1144 * The nodes of the sources are linked as children to the nodes of the
1145 * targets. Some nodes may be created.
1146 *
1147 * We parse a dependency line by first extracting words from the line and
1148 * finding nodes in the list of all targets with that name. This is done
1149 * until a character is encountered which is an operator character. Currently
1150 * these are only ! and :. At this point the operator is parsed and the
1151 * pointer into the line advanced until the first source is encountered.
1152 * The parsed operator is applied to each node in the 'targets' list,
1153 * which is where the nodes found for the targets are kept, by means of
1154 * the ParseDoOp function.
1155 * The sources are read in much the same way as the targets were except
1156 * that now they are expanded using the wildcarding scheme of the C-Shell
1157 * and all instances of the resulting words in the list of all targets
1158 * are found. Each of the resulting nodes is then linked to each of the
1159 * targets as one of its children.
1160 * Certain targets are handled specially. These are the ones detailed
1161 * by the specType variable.
1162 * The storing of transformation rules is also taken care of here.
1163 * A target is recognized as a transformation rule by calling
1164 * Suff_IsTransform. If it is a transformation rule, its node is gotten
1165 * from the suffix module via Suff_AddTransform rather than the standard
1166 * Targ_FindNode in the target module.
1167 *---------------------------------------------------------------------
1168 */
1169static void
1170ParseDoDependency(char *line)
1171{
1172 char *cp; /* our current position */
1173 GNode *gn = NULL; /* a general purpose temporary node */
1174 int op; /* the operator on the line */
1175 char savec; /* a place to save a character */
1176 Lst paths; /* List of search paths to alter when parsing
1177 * a list of .PATH targets */
1178 int tOp; /* operator from special target */
1179 Lst sources; /* list of archive source names after
1180 * expansion */
1181 Lst curTargs; /* list of target names to be found and added
1182 * to the targets list */
1183 char *lstart = line;
1184
1185 if (DEBUG(PARSE))
1186 fprintf(debug_file, "ParseDoDependency(%s)\n", line);
1187 tOp = 0;
1188
1189 specType = Not;
1190 paths = NULL;
1191
1192 curTargs = Lst_Init(FALSE);
1193
1194 do {
1195 for (cp = line; *cp && (ParseIsEscaped(lstart, cp) ||
1196 !(isspace((unsigned char)*cp) ||
1197 *cp == '!' || *cp == ':' || *cp == LPAREN));
1198 cp++) {
1199 if (*cp == '$') {
1200 /*
1201 * Must be a dynamic source (would have been expanded
1202 * otherwise), so call the Var module to parse the puppy
1203 * so we can safely advance beyond it...There should be
1204 * no errors in this, as they would have been discovered
1205 * in the initial Var_Subst and we wouldn't be here.
1206 */
1207 int length;
1208 void *freeIt;
1209 char *result;
1210
1211 result = Var_Parse(cp, VAR_CMD, TRUE, &length, &freeIt);
1212 if (freeIt)
1213 free(freeIt);
1214 cp += length-1;
1215 }
1216 }
1217
1218 if (!ParseIsEscaped(lstart, cp) && *cp == LPAREN) {
1219 /*
1220 * Archives must be handled specially to make sure the OP_ARCHV
1221 * flag is set in their 'type' field, for one thing, and because
1222 * things like "archive(file1.o file2.o file3.o)" are permissible.
1223 * Arch_ParseArchive will set 'line' to be the first non-blank
1224 * after the archive-spec. It creates/finds nodes for the members
1225 * and places them on the given list, returning SUCCESS if all
1226 * went well and FAILURE if there was an error in the
1227 * specification. On error, line should remain untouched.
1228 */
1229 if (Arch_ParseArchive(&line, targets, VAR_CMD) != SUCCESS) {
1230 Parse_Error(PARSE_FATAL,
1231 "Error in archive specification: \"%s\"", line);
1232 goto out;
1233 } else {
1234 continue;
1235 }
1236 }
1237 savec = *cp;
1238
1239 if (!*cp) {
1240 /*
1241 * Ending a dependency line without an operator is a Bozo
1242 * no-no. As a heuristic, this is also often triggered by
1243 * undetected conflicts from cvs/rcs merges.
1244 */
1245 if ((strncmp(line, "<<<<<<", 6) == 0) ||
1246 (strncmp(line, "======", 6) == 0) ||
1247 (strncmp(line, ">>>>>>", 6) == 0))
1248 Parse_Error(PARSE_FATAL,
1249 "Makefile appears to contain unresolved cvs/rcs/??? merge conflicts");
1250 else
1251 Parse_Error(PARSE_FATAL, lstart[0] == '.' ? "Unknown directive"
1252 : "Need an operator");
1253 goto out;
1254 }
1255 *cp = '\0';
1256
1257 /*
1258 * Have a word in line. See if it's a special target and set
1259 * specType to match it.
1260 */
1261 if (*line == '.' && isupper ((unsigned char)line[1])) {
1262 /*
1263 * See if the target is a special target that must have it
1264 * or its sources handled specially.
1265 */
1266 int keywd = ParseFindKeyword(line);
1267 if (keywd != -1) {
1268 if (specType == ExPath && parseKeywords[keywd].spec != ExPath) {
1269 Parse_Error(PARSE_FATAL, "Mismatched special targets");
1270 goto out;
1271 }
1272
1273 specType = parseKeywords[keywd].spec;
1274 tOp = parseKeywords[keywd].op;
1275
1276 /*
1277 * Certain special targets have special semantics:
1278 * .PATH Have to set the dirSearchPath
1279 * variable too
1280 * .MAIN Its sources are only used if
1281 * nothing has been specified to
1282 * create.
1283 * .DEFAULT Need to create a node to hang
1284 * commands on, but we don't want
1285 * it in the graph, nor do we want
1286 * it to be the Main Target, so we
1287 * create it, set OP_NOTMAIN and
1288 * add it to the list, setting
1289 * DEFAULT to the new node for
1290 * later use. We claim the node is
1291 * A transformation rule to make
1292 * life easier later, when we'll
1293 * use Make_HandleUse to actually
1294 * apply the .DEFAULT commands.
1295 * .PHONY The list of targets
1296 * .NOPATH Don't search for file in the path
1297 * .BEGIN
1298 * .END
1299 * .ERROR
1300 * .INTERRUPT Are not to be considered the
1301 * main target.
1302 * .NOTPARALLEL Make only one target at a time.
1303 * .SINGLESHELL Create a shell for each command.
1304 * .ORDER Must set initial predecessor to NULL
1305 */
1306 switch (specType) {
1307 case ExPath:
1308 if (paths == NULL) {
1309 paths = Lst_Init(FALSE);
1310 }
1311 (void)Lst_AtEnd(paths, dirSearchPath);
1312 break;
1313 case Main:
1314 if (!Lst_IsEmpty(create)) {
1315 specType = Not;
1316 }
1317 break;
1318 case Begin:
1319 case End:
1320 case dotError:
1321 case Interrupt:
1322 gn = Targ_FindNode(line, TARG_CREATE);
1323 gn->type |= OP_NOTMAIN|OP_SPECIAL;
1324 (void)Lst_AtEnd(targets, gn);
1325 break;
1326 case Default:
1327 gn = Targ_NewGN(".DEFAULT");
1328 gn->type |= (OP_NOTMAIN|OP_TRANSFORM);
1329 (void)Lst_AtEnd(targets, gn);
1330 DEFAULT = gn;
1331 break;
1332 case NotParallel:
1333 maxJobs = 1;
1334 break;
1335 case SingleShell:
1336 compatMake = TRUE;
1337 break;
1338 case Order:
1339 predecessor = NULL;
1340 break;
1341 default:
1342 break;
1343 }
1344 } else if (strncmp(line, ".PATH", 5) == 0) {
1345 /*
1346 * .PATH<suffix> has to be handled specially.
1347 * Call on the suffix module to give us a path to
1348 * modify.
1349 */
1350 Lst path;
1351
1352 specType = ExPath;
1353 path = Suff_GetPath(&line[5]);
1354 if (path == NULL) {
1355 Parse_Error(PARSE_FATAL,
1356 "Suffix '%s' not defined (yet)",
1357 &line[5]);
1358 goto out;
1359 } else {
1360 if (paths == NULL) {
1361 paths = Lst_Init(FALSE);
1362 }
1363 (void)Lst_AtEnd(paths, path);
1364 }
1365 }
1366 }
1367
1368 /*
1369 * Have word in line. Get or create its node and stick it at
1370 * the end of the targets list
1371 */
1372 if ((specType == Not) && (*line != '\0')) {
1373 if (Dir_HasWildcards(line)) {
1374 /*
1375 * Targets are to be sought only in the current directory,
1376 * so create an empty path for the thing. Note we need to
1377 * use Dir_Destroy in the destruction of the path as the
1378 * Dir module could have added a directory to the path...
1379 */
1380 Lst emptyPath = Lst_Init(FALSE);
1381
1382 Dir_Expand(line, emptyPath, curTargs);
1383
1384 Lst_Destroy(emptyPath, Dir_Destroy);
1385 } else {
1386 /*
1387 * No wildcards, but we want to avoid code duplication,
1388 * so create a list with the word on it.
1389 */
1390 (void)Lst_AtEnd(curTargs, line);
1391 }
1392
1393 while(!Lst_IsEmpty(curTargs)) {
1394 char *targName = (char *)Lst_DeQueue(curTargs);
1395
1396 if (!Suff_IsTransform (targName)) {
1397 gn = Targ_FindNode(targName, TARG_CREATE);
1398 } else {
1399 gn = Suff_AddTransform(targName);
1400 }
1401
1402 (void)Lst_AtEnd(targets, gn);
1403 }
1404 } else if (specType == ExPath && *line != '.' && *line != '\0') {
1405 Parse_Error(PARSE_WARNING, "Extra target (%s) ignored", line);
1406 }
1407
1408 *cp = savec;
1409 /*
1410 * If it is a special type and not .PATH, it's the only target we
1411 * allow on this line...
1412 */
1413 if (specType != Not && specType != ExPath) {
1414 Boolean warning = FALSE;
1415
1416 while (*cp && (ParseIsEscaped(lstart, cp) ||
1417 ((*cp != '!') && (*cp != ':')))) {
1418 if (ParseIsEscaped(lstart, cp) ||
1419 (*cp != ' ' && *cp != '\t')) {
1420 warning = TRUE;
1421 }
1422 cp++;
1423 }
1424 if (warning) {
1425 Parse_Error(PARSE_WARNING, "Extra target ignored");
1426 }
1427 } else {
1428 while (*cp && isspace ((unsigned char)*cp)) {
1429 cp++;
1430 }
1431 }
1432 line = cp;
1433 } while (*line && (ParseIsEscaped(lstart, line) ||
1434 ((*line != '!') && (*line != ':'))));
1435
1436 /*
1437 * Don't need the list of target names anymore...
1438 */
1439 Lst_Destroy(curTargs, NULL);
1440 curTargs = NULL;
1441
1442 if (!Lst_IsEmpty(targets)) {
1443 switch(specType) {
1444 default:
1445 Parse_Error(PARSE_WARNING, "Special and mundane targets don't mix. Mundane ones ignored");
1446 break;
1447 case Default:
1448 case Begin:
1449 case End:
1450 case dotError:
1451 case Interrupt:
1452 /*
1453 * These four create nodes on which to hang commands, so
1454 * targets shouldn't be empty...
1455 */
1456 case Not:
1457 /*
1458 * Nothing special here -- targets can be empty if it wants.
1459 */
1460 break;
1461 }
1462 }
1463
1464 /*
1465 * Have now parsed all the target names. Must parse the operator next. The
1466 * result is left in op .
1467 */
1468 if (*cp == '!') {
1469 op = OP_FORCE;
1470 } else if (*cp == ':') {
1471 if (cp[1] == ':') {
1472 op = OP_DOUBLEDEP;
1473 cp++;
1474 } else {
1475 op = OP_DEPENDS;
1476 }
1477 } else {
1478 Parse_Error(PARSE_FATAL, lstart[0] == '.' ? "Unknown directive"
1479 : "Missing dependency operator");
1480 goto out;
1481 }
1482
1483 cp++; /* Advance beyond operator */
1484
1485 Lst_ForEach(targets, ParseDoOp, &op);
1486
1487 /*
1488 * Get to the first source
1489 */
1490 while (*cp && isspace ((unsigned char)*cp)) {
1491 cp++;
1492 }
1493 line = cp;
1494
1495 /*
1496 * Several special targets take different actions if present with no
1497 * sources:
1498 * a .SUFFIXES line with no sources clears out all old suffixes
1499 * a .PRECIOUS line makes all targets precious
1500 * a .IGNORE line ignores errors for all targets
1501 * a .SILENT line creates silence when making all targets
1502 * a .PATH removes all directories from the search path(s).
1503 */
1504 if (!*line) {
1505 switch (specType) {
1506 case Suffixes:
1507 Suff_ClearSuffixes();
1508 break;
1509 case Precious:
1510 allPrecious = TRUE;
1511 break;
1512 case Ignore:
1513 ignoreErrors = TRUE;
1514 break;
1515 case Silent:
1516 beSilent = TRUE;
1517 break;
1518 case ExPath:
1519 Lst_ForEach(paths, ParseClearPath, NULL);
1520 Dir_SetPATH();
1521 break;
1522#ifdef POSIX
1523 case Posix:
1524 Var_Set("%POSIX", "1003.2", VAR_GLOBAL, 0);
1525 break;
1526#endif
1527 default:
1528 break;
1529 }
1530 } else if (specType == MFlags) {
1531 /*
1532 * Call on functions in main.c to deal with these arguments and
1533 * set the initial character to a null-character so the loop to
1534 * get sources won't get anything
1535 */
1536 Main_ParseArgLine(line);
1537 *line = '\0';
1538 } else if (specType == ExShell) {
1539 if (Job_ParseShell(line) != SUCCESS) {
1540 Parse_Error(PARSE_FATAL, "improper shell specification");
1541 goto out;
1542 }
1543 *line = '\0';
1544 } else if ((specType == NotParallel) || (specType == SingleShell)) {
1545 *line = '\0';
1546 }
1547
1548 /*
1549 * NOW GO FOR THE SOURCES
1550 */
1551 if ((specType == Suffixes) || (specType == ExPath) ||
1552 (specType == Includes) || (specType == Libs) ||
1553 (specType == Null) || (specType == ExObjdir))
1554 {
1555 while (*line) {
1556 /*
1557 * If the target was one that doesn't take files as its sources
1558 * but takes something like suffixes, we take each
1559 * space-separated word on the line as a something and deal
1560 * with it accordingly.
1561 *
1562 * If the target was .SUFFIXES, we take each source as a
1563 * suffix and add it to the list of suffixes maintained by the
1564 * Suff module.
1565 *
1566 * If the target was a .PATH, we add the source as a directory
1567 * to search on the search path.
1568 *
1569 * If it was .INCLUDES, the source is taken to be the suffix of
1570 * files which will be #included and whose search path should
1571 * be present in the .INCLUDES variable.
1572 *
1573 * If it was .LIBS, the source is taken to be the suffix of
1574 * files which are considered libraries and whose search path
1575 * should be present in the .LIBS variable.
1576 *
1577 * If it was .NULL, the source is the suffix to use when a file
1578 * has no valid suffix.
1579 *
1580 * If it was .OBJDIR, the source is a new definition for .OBJDIR,
1581 * and will cause make to do a new chdir to that path.
1582 */
1583 while (*cp && !isspace ((unsigned char)*cp)) {
1584 cp++;
1585 }
1586 savec = *cp;
1587 *cp = '\0';
1588 switch (specType) {
1589 case Suffixes:
1590 Suff_AddSuffix(line, &mainNode);
1591 break;
1592 case ExPath:
1593 Lst_ForEach(paths, ParseAddDir, line);
1594 break;
1595 case Includes:
1596 Suff_AddInclude(line);
1597 break;
1598 case Libs:
1599 Suff_AddLib(line);
1600 break;
1601 case Null:
1602 Suff_SetNull(line);
1603 break;
1604 case ExObjdir:
1605 Main_SetObjdir(line);
1606 break;
1607 default:
1608 break;
1609 }
1610 *cp = savec;
1611 if (savec != '\0') {
1612 cp++;
1613 }
1614 while (*cp && isspace ((unsigned char)*cp)) {
1615 cp++;
1616 }
1617 line = cp;
1618 }
1619 if (paths) {
1620 Lst_Destroy(paths, NULL);
1621 }
1622 if (specType == ExPath)
1623 Dir_SetPATH();
1624 } else {
1625 while (*line) {
1626 /*
1627 * The targets take real sources, so we must beware of archive
1628 * specifications (i.e. things with left parentheses in them)
1629 * and handle them accordingly.
1630 */
1631 for (; *cp && !isspace ((unsigned char)*cp); cp++) {
1632 if ((*cp == LPAREN) && (cp > line) && (cp[-1] != '$')) {
1633 /*
1634 * Only stop for a left parenthesis if it isn't at the
1635 * start of a word (that'll be for variable changes
1636 * later) and isn't preceded by a dollar sign (a dynamic
1637 * source).
1638 */
1639 break;
1640 }
1641 }
1642
1643 if (*cp == LPAREN) {
1644 sources = Lst_Init(FALSE);
1645 if (Arch_ParseArchive(&line, sources, VAR_CMD) != SUCCESS) {
1646 Parse_Error(PARSE_FATAL,
1647 "Error in source archive spec \"%s\"", line);
1648 goto out;
1649 }
1650
1651 while (!Lst_IsEmpty (sources)) {
1652 gn = (GNode *)Lst_DeQueue(sources);
1653 ParseDoSrc(tOp, gn->name);
1654 }
1655 Lst_Destroy(sources, NULL);
1656 cp = line;
1657 } else {
1658 if (*cp) {
1659 *cp = '\0';
1660 cp += 1;
1661 }
1662
1663 ParseDoSrc(tOp, line);
1664 }
1665 while (*cp && isspace ((unsigned char)*cp)) {
1666 cp++;
1667 }
1668 line = cp;
1669 }
1670 }
1671
1672 if (mainNode == NULL) {
1673 /*
1674 * If we have yet to decide on a main target to make, in the
1675 * absence of any user input, we want the first target on
1676 * the first dependency line that is actually a real target
1677 * (i.e. isn't a .USE or .EXEC rule) to be made.
1678 */
1679 Lst_ForEach(targets, ParseFindMain, NULL);
1680 }
1681
1682out:
1683 if (curTargs)
1684 Lst_Destroy(curTargs, NULL);
1685}
1686
1687/*-
1688 *---------------------------------------------------------------------
1689 * Parse_IsVar --
1690 * Return TRUE if the passed line is a variable assignment. A variable
1691 * assignment consists of a single word followed by optional whitespace
1692 * followed by either a += or an = operator.
1693 * This function is used both by the Parse_File function and main when
1694 * parsing the command-line arguments.
1695 *
1696 * Input:
1697 * line the line to check
1698 *
1699 * Results:
1700 * TRUE if it is. FALSE if it ain't
1701 *
1702 * Side Effects:
1703 * none
1704 *---------------------------------------------------------------------
1705 */
1706Boolean
1707Parse_IsVar(char *line)
1708{
1709 Boolean wasSpace = FALSE; /* set TRUE if found a space */
1710 char ch;
1711 int level = 0;
1712#define ISEQOPERATOR(c) \
1713 (((c) == '+') || ((c) == ':') || ((c) == '?') || ((c) == '!'))
1714
1715 /*
1716 * Skip to variable name
1717 */
1718 for (;(*line == ' ') || (*line == '\t'); line++)
1719 continue;
1720
1721 /* Scan for one of the assignment operators outside a variable expansion */
1722 while ((ch = *line++) != 0) {
1723 if (ch == '(' || ch == '{') {
1724 level++;
1725 continue;
1726 }
1727 if (ch == ')' || ch == '}') {
1728 level--;
1729 continue;
1730 }
1731 if (level != 0)
1732 continue;
1733 while (ch == ' ' || ch == '\t') {
1734 ch = *line++;
1735 wasSpace = TRUE;
1736 }
1737 if (ch == '=')
1738 return TRUE;
1739 if (*line == '=' && ISEQOPERATOR(ch))
1740 return TRUE;
1741 if (wasSpace)
1742 return FALSE;
1743 }
1744
1745 return FALSE;
1746}
1747
1748/*-
1749 *---------------------------------------------------------------------
1750 * Parse_DoVar --
1751 * Take the variable assignment in the passed line and do it in the
1752 * global context.
1753 *
1754 * Note: There is a lexical ambiguity with assignment modifier characters
1755 * in variable names. This routine interprets the character before the =
1756 * as a modifier. Therefore, an assignment like
1757 * C++=/usr/bin/CC
1758 * is interpreted as "C+ +=" instead of "C++ =".
1759 *
1760 * Input:
1761 * line a line guaranteed to be a variable assignment.
1762 * This reduces error checks
1763 * ctxt Context in which to do the assignment
1764 *
1765 * Results:
1766 * none
1767 *
1768 * Side Effects:
1769 * the variable structure of the given variable name is altered in the
1770 * global context.
1771 *---------------------------------------------------------------------
1772 */
1773void
1774Parse_DoVar(char *line, GNode *ctxt)
1775{
1776 char *cp; /* pointer into line */
1777 enum {
1778 VAR_SUBST, VAR_APPEND, VAR_SHELL, VAR_NORMAL
1779 } type; /* Type of assignment */
1780 char *opc; /* ptr to operator character to
1781 * null-terminate the variable name */
1782 Boolean freeCp = FALSE; /* TRUE if cp needs to be freed,
1783 * i.e. if any variable expansion was
1784 * performed */
1785 int depth;
1786
1787 /*
1788 * Skip to variable name
1789 */
1790 while ((*line == ' ') || (*line == '\t')) {
1791 line++;
1792 }
1793
1794 /*
1795 * Skip to operator character, nulling out whitespace as we go
1796 * XXX Rather than counting () and {} we should look for $ and
1797 * then expand the variable.
1798 */
1799 for (depth = 0, cp = line + 1; depth != 0 || *cp != '='; cp++) {
1800 if (*cp == '(' || *cp == '{') {
1801 depth++;
1802 continue;
1803 }
1804 if (*cp == ')' || *cp == '}') {
1805 depth--;
1806 continue;
1807 }
1808 if (depth == 0 && isspace ((unsigned char)*cp)) {
1809 *cp = '\0';
1810 }
1811 }
1812 opc = cp-1; /* operator is the previous character */
1813 *cp++ = '\0'; /* nuke the = */
1814
1815 /*
1816 * Check operator type
1817 */
1818 switch (*opc) {
1819 case '+':
1820 type = VAR_APPEND;
1821 *opc = '\0';
1822 break;
1823
1824 case '?':
1825 /*
1826 * If the variable already has a value, we don't do anything.
1827 */
1828 *opc = '\0';
1829 if (Var_Exists(line, ctxt)) {
1830 return;
1831 } else {
1832 type = VAR_NORMAL;
1833 }
1834 break;
1835
1836 case ':':
1837 type = VAR_SUBST;
1838 *opc = '\0';
1839 break;
1840
1841 case '!':
1842 type = VAR_SHELL;
1843 *opc = '\0';
1844 break;
1845
1846 default:
1847#ifdef SUNSHCMD
1848 while (opc > line && *opc != ':')
1849 opc--;
1850
1851 if (strncmp(opc, ":sh", 3) == 0) {
1852 type = VAR_SHELL;
1853 *opc = '\0';
1854 break;
1855 }
1856#endif
1857 type = VAR_NORMAL;
1858 break;
1859 }
1860
1861 while (isspace ((unsigned char)*cp)) {
1862 cp++;
1863 }
1864
1865 if (type == VAR_APPEND) {
1866 Var_Append(line, cp, ctxt);
1867 } else if (type == VAR_SUBST) {
1868 /*
1869 * Allow variables in the old value to be undefined, but leave their
1870 * invocation alone -- this is done by forcing oldVars to be false.
1871 * XXX: This can cause recursive variables, but that's not hard to do,
1872 * and this allows someone to do something like
1873 *
1874 * CFLAGS = $(.INCLUDES)
1875 * CFLAGS := -I.. $(CFLAGS)
1876 *
1877 * And not get an error.
1878 */
1879 Boolean oldOldVars = oldVars;
1880
1881 oldVars = FALSE;
1882
1883 /*
1884 * make sure that we set the variable the first time to nothing
1885 * so that it gets substituted!
1886 */
1887 if (!Var_Exists(line, ctxt))
1888 Var_Set(line, "", ctxt, 0);
1889
1890 cp = Var_Subst(NULL, cp, ctxt, FALSE);
1891 oldVars = oldOldVars;
1892 freeCp = TRUE;
1893
1894 Var_Set(line, cp, ctxt, 0);
1895 } else if (type == VAR_SHELL) {
1896 char *res;
1897 const char *error;
1898
1899 if (strchr(cp, '$') != NULL) {
1900 /*
1901 * There's a dollar sign in the command, so perform variable
1902 * expansion on the whole thing. The resulting string will need
1903 * freeing when we're done, so set freeCmd to TRUE.
1904 */
1905 cp = Var_Subst(NULL, cp, VAR_CMD, TRUE);
1906 freeCp = TRUE;
1907 }
1908
1909 res = Cmd_Exec(cp, &error);
1910 Var_Set(line, res, ctxt, 0);
1911 free(res);
1912
1913 if (error)
1914 Parse_Error(PARSE_WARNING, error, cp);
1915 } else {
1916 /*
1917 * Normal assignment -- just do it.
1918 */
1919 Var_Set(line, cp, ctxt, 0);
1920 }
1921 if (strcmp(line, MAKEOVERRIDES) == 0)
1922 Main_ExportMAKEFLAGS(FALSE); /* re-export MAKEFLAGS */
1923 else if (strcmp(line, ".CURDIR") == 0) {
1924 /*
1925 * Somone is being (too?) clever...
1926 * Let's pretend they know what they are doing and
1927 * re-initialize the 'cur' Path.
1928 */
1929 Dir_InitCur(cp);
1930 Dir_SetPATH();
1931 } else if (strcmp(line, MAKE_JOB_PREFIX) == 0) {
1932 Job_SetPrefix();
1933 } else if (strcmp(line, MAKE_EXPORTED) == 0) {
1934 Var_Export(cp, 0);
1935 }
1936 if (freeCp)
1937 free(cp);
1938}
1939
1940
1941/*-
1942 * ParseAddCmd --
1943 * Lst_ForEach function to add a command line to all targets
1944 *
1945 * Input:
1946 * gnp the node to which the command is to be added
1947 * cmd the command to add
1948 *
1949 * Results:
1950 * Always 0
1951 *
1952 * Side Effects:
1953 * A new element is added to the commands list of the node.
1954 */
1955static int
1956ParseAddCmd(void *gnp, void *cmd)
1957{
1958 GNode *gn = (GNode *)gnp;
1959
1960 /* Add to last (ie current) cohort for :: targets */
1961 if ((gn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (gn->cohorts))
1962 gn = (GNode *)Lst_Datum(Lst_Last(gn->cohorts));
1963
1964 /* if target already supplied, ignore commands */
1965 if (!(gn->type & OP_HAS_COMMANDS)) {
1966 (void)Lst_AtEnd(gn->commands, cmd);
1967 ParseMark(gn);
1968 } else {
1969#ifdef notyet
1970 /* XXX: We cannot do this until we fix the tree */
1971 (void)Lst_AtEnd(gn->commands, cmd);
1972 Parse_Error(PARSE_WARNING,
1973 "overriding commands for target \"%s\"; "
1974 "previous commands defined at %s: %d ignored",
1975 gn->name, gn->fname, gn->lineno);
1976#else
1977 Parse_Error(PARSE_WARNING,
1978 "duplicate script for target \"%s\" ignored",
1979 gn->name);
1980 ParseErrorInternal(gn->fname, gn->lineno, PARSE_WARNING,
1981 "using previous script for \"%s\" defined here",
1982 gn->name);
1983#endif
1984 }
1985 return(0);
1986}
1987
1988/*-
1989 *-----------------------------------------------------------------------
1990 * ParseHasCommands --
1991 * Callback procedure for Parse_File when destroying the list of
1992 * targets on the last dependency line. Marks a target as already
1993 * having commands if it does, to keep from having shell commands
1994 * on multiple dependency lines.
1995 *
1996 * Input:
1997 * gnp Node to examine
1998 *
1999 * Results:
2000 * None
2001 *
2002 * Side Effects:
2003 * OP_HAS_COMMANDS may be set for the target.
2004 *
2005 *-----------------------------------------------------------------------
2006 */
2007static void
2008ParseHasCommands(void *gnp)
2009{
2010 GNode *gn = (GNode *)gnp;
2011 if (!Lst_IsEmpty(gn->commands)) {
2012 gn->type |= OP_HAS_COMMANDS;
2013 }
2014}
2015
2016/*-
2017 *-----------------------------------------------------------------------
2018 * Parse_AddIncludeDir --
2019 * Add a directory to the path searched for included makefiles
2020 * bracketed by double-quotes. Used by functions in main.c
2021 *
2022 * Input:
2023 * dir The name of the directory to add
2024 *
2025 * Results:
2026 * None.
2027 *
2028 * Side Effects:
2029 * The directory is appended to the list.
2030 *
2031 *-----------------------------------------------------------------------
2032 */
2033void
2034Parse_AddIncludeDir(char *dir)
2035{
2036 (void)Dir_AddDir(parseIncPath, dir);
2037}
2038
2039/*-
2040 *---------------------------------------------------------------------
2041 * ParseDoInclude --
2042 * Push to another file.
2043 *
2044 * The input is the line minus the `.'. A file spec is a string
2045 * enclosed in <> or "". The former is looked for only in sysIncPath.
2046 * The latter in . and the directories specified by -I command line
2047 * options
2048 *
2049 * Results:
2050 * None
2051 *
2052 * Side Effects:
2053 * A structure is added to the includes Lst and readProc, lineno,
2054 * fname and curFILE are altered for the new file
2055 *---------------------------------------------------------------------
2056 */
2057
2058static void
2059Parse_include_file(char *file, Boolean isSystem, int silent)
2060{
2061 struct loadedfile *lf;
2062 char *fullname; /* full pathname of file */
2063 char *newName;
2064 char *prefEnd, *incdir;
2065 int fd;
2066 int i;
2067
2068 /*
2069 * Now we know the file's name and its search path, we attempt to
2070 * find the durn thing. A return of NULL indicates the file don't
2071 * exist.
2072 */
2073 fullname = file[0] == '/' ? bmake_strdup(file) : NULL;
2074
2075 if (fullname == NULL && !isSystem) {
2076 /*
2077 * Include files contained in double-quotes are first searched for
2078 * relative to the including file's location. We don't want to
2079 * cd there, of course, so we just tack on the old file's
2080 * leading path components and call Dir_FindFile to see if
2081 * we can locate the beast.
2082 */
2083
2084 incdir = bmake_strdup(curFile->fname);
2085 prefEnd = strrchr(incdir, '/');
2086 if (prefEnd != NULL) {
2087 *prefEnd = '\0';
2088 /* Now do lexical processing of leading "../" on the filename */
2089 for (i = 0; strncmp(file + i, "../", 3) == 0; i += 3) {
2090 prefEnd = strrchr(incdir + 1, '/');
2091 if (prefEnd == NULL || strcmp(prefEnd, "/..") == 0)
2092 break;
2093 *prefEnd = '\0';
2094 }
2095 newName = str_concat(incdir, file + i, STR_ADDSLASH);
2096 fullname = Dir_FindFile(newName, parseIncPath);
2097 if (fullname == NULL)
2098 fullname = Dir_FindFile(newName, dirSearchPath);
2099 free(newName);
2100 }
2101 free(incdir);
2102
2103 if (fullname == NULL) {
2104 /*
2105 * Makefile wasn't found in same directory as included makefile.
2106 * Search for it first on the -I search path,
2107 * then on the .PATH search path, if not found in a -I directory.
2108 * If we have a suffix specific path we should use that.
2109 */
2110 char *suff;
2111 Lst suffPath = NULL;
2112
2113 if ((suff = strrchr(file, '.'))) {
2114 suffPath = Suff_GetPath(suff);
2115 if (suffPath != NULL) {
2116 fullname = Dir_FindFile(file, suffPath);
2117 }
2118 }
2119 if (fullname == NULL) {
2120 fullname = Dir_FindFile(file, parseIncPath);
2121 if (fullname == NULL) {
2122 fullname = Dir_FindFile(file, dirSearchPath);
2123 }
2124 }
2125 }
2126 }
2127
2128 /* Looking for a system file or file still not found */
2129 if (fullname == NULL) {
2130 /*
2131 * Look for it on the system path
2132 */
2133 fullname = Dir_FindFile(file,
2134 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath);
2135 }
2136
2137 if (fullname == NULL) {
2138 if (!silent)
2139 Parse_Error(PARSE_FATAL, "Could not find %s", file);
2140 return;
2141 }
2142
2143 /* Actually open the file... */
2144 fd = open(fullname, O_RDONLY);
2145 if (fd == -1) {
2146 if (!silent)
2147 Parse_Error(PARSE_FATAL, "Cannot open %s", fullname);
2148 free(fullname);
2149 return;
2150 }
2151
2152 /* load it */
2153 lf = loadfile(fullname, fd);
2154
2155 /* Start reading from this file next */
2156 Parse_SetInput(fullname, 0, -1, loadedfile_nextbuf, lf);
2157 curFile->lf = lf;
2158}
2159
2160static void
2161ParseDoInclude(char *line)
2162{
2163 char endc; /* the character which ends the file spec */
2164 char *cp; /* current position in file spec */
2165 int silent = (*line != 'i') ? 1 : 0;
2166 char *file = &line[7 + silent];
2167
2168 /* Skip to delimiter character so we know where to look */
2169 while (*file == ' ' || *file == '\t')
2170 file++;
2171
2172 if (*file != '"' && *file != '<') {
2173 Parse_Error(PARSE_FATAL,
2174 ".include filename must be delimited by '\"' or '<'");
2175 return;
2176 }
2177
2178 /*
2179 * Set the search path on which to find the include file based on the
2180 * characters which bracket its name. Angle-brackets imply it's
2181 * a system Makefile while double-quotes imply it's a user makefile
2182 */
2183 if (*file == '<') {
2184 endc = '>';
2185 } else {
2186 endc = '"';
2187 }
2188
2189 /* Skip to matching delimiter */
2190 for (cp = ++file; *cp && *cp != endc; cp++)
2191 continue;
2192
2193 if (*cp != endc) {
2194 Parse_Error(PARSE_FATAL,
2195 "Unclosed %cinclude filename. '%c' expected",
2196 '.', endc);
2197 return;
2198 }
2199 *cp = '\0';
2200
2201 /*
2202 * Substitute for any variables in the file name before trying to
2203 * find the thing.
2204 */
2205 file = Var_Subst(NULL, file, VAR_CMD, FALSE);
2206
2207 Parse_include_file(file, endc == '>', silent);
2208 free(file);
2209}
2210
2211
2212/*-
2213 *---------------------------------------------------------------------
2214 * ParseSetParseFile --
2215 * Set the .PARSEDIR and .PARSEFILE variables to the dirname and
2216 * basename of the given filename
2217 *
2218 * Results:
2219 * None
2220 *
2221 * Side Effects:
2222 * The .PARSEDIR and .PARSEFILE variables are overwritten by the
2223 * dirname and basename of the given filename.
2224 *---------------------------------------------------------------------
2225 */
2226static void
2227ParseSetParseFile(const char *filename)
2228{
2229 char *slash, *dirname;
2230 const char *pd, *pf;
2231 int len;
2232
2233 slash = strrchr(filename, '/');
2234 if (slash == NULL) {
2235 Var_Set(".PARSEDIR", pd = curdir, VAR_GLOBAL, 0);
2236 Var_Set(".PARSEFILE", pf = filename, VAR_GLOBAL, 0);
2237 dirname= NULL;
2238 } else {
2239 len = slash - filename;
2240 dirname = bmake_malloc(len + 1);
2241 memcpy(dirname, filename, len);
2242 dirname[len] = '\0';
2243 Var_Set(".PARSEDIR", pd = dirname, VAR_GLOBAL, 0);
2244 Var_Set(".PARSEFILE", pf = slash + 1, VAR_GLOBAL, 0);
2245 }
2246 if (DEBUG(PARSE))
2247 fprintf(debug_file, "ParseSetParseFile: ${.PARSEDIR} = `%s' "
2248 "${.PARSEFILE} = `%s'\n", pd, pf);
2249 free(dirname);
2250}
2251
2252/*
2253 * Track the makefiles we read - so makefiles can
2254 * set dependencies on them.
2255 * Avoid adding anything more than once.
2256 */
2257
2258static void
2259ParseTrackInput(const char *name)
2260{
2261 char *old;
2262 char *fp = NULL;
2263 size_t name_len = strlen(name);
2264
2265 old = Var_Value(MAKE_MAKEFILES, VAR_GLOBAL, &fp);
2266 if (old) {
2267 /* does it contain name? */
2268 for (; old != NULL; old = strchr(old, ' ')) {
2269 if (*old == ' ')
2270 old++;
2271 if (memcmp(old, name, name_len) == 0
2272 && (old[name_len] == 0 || old[name_len] == ' '))
2273 goto cleanup;
2274 }
2275 }
2276 Var_Append (MAKE_MAKEFILES, name, VAR_GLOBAL);
2277 cleanup:
2278 if (fp) {
2279 free(fp);
2280 }
2281}
2282
2283
2284/*-
2285 *---------------------------------------------------------------------
2286 * Parse_setInput --
2287 * Start Parsing from the given source
2288 *
2289 * Results:
2290 * None
2291 *
2292 * Side Effects:
2293 * A structure is added to the includes Lst and readProc, lineno,
2294 * fname and curFile are altered for the new file
2295 *---------------------------------------------------------------------
2296 */
2297void
2298Parse_SetInput(const char *name, int line, int fd,
2299 char *(*nextbuf)(void *, size_t *), void *arg)
2300{
2301 char *buf;
2302 size_t len;
2303
2304 if (name == NULL)
2305 name = curFile->fname;
2306 else
2307 ParseTrackInput(name);
2308
2309 if (DEBUG(PARSE))
2310 fprintf(debug_file, "Parse_SetInput: file %s, line %d, fd %d, nextbuf %p, arg %p\n",
2311 name, line, fd, nextbuf, arg);
2312
2313 if (fd == -1 && nextbuf == NULL)
2314 /* sanity */
2315 return;
2316
2317 if (curFile != NULL)
2318 /* Save exiting file info */
2319 Lst_AtFront(includes, curFile);
2320
2321 /* Allocate and fill in new structure */
2322 curFile = bmake_malloc(sizeof *curFile);
2323
2324 /*
2325 * Once the previous state has been saved, we can get down to reading
2326 * the new file. We set up the name of the file to be the absolute
2327 * name of the include file so error messages refer to the right
2328 * place.
2329 */
2330 curFile->fname = name;
2331 curFile->lineno = line;
2332 curFile->first_lineno = line;
2333 curFile->nextbuf = nextbuf;
2334 curFile->nextbuf_arg = arg;
2335 curFile->lf = NULL;
2336
2337 assert(nextbuf != NULL);
2338
2339 /* Get first block of input data */
2340 buf = curFile->nextbuf(curFile->nextbuf_arg, &len);
2341 if (buf == NULL) {
2342 /* Was all a waste of time ... */
2343 free(curFile);
2344 return;
2345 }
2346 curFile->P_str = buf;
2347 curFile->P_ptr = buf;
2348 curFile->P_end = buf+len;
2349
2350 curFile->cond_depth = Cond_save_depth();
2351 ParseSetParseFile(name);
2352}
2353
2354#ifdef SYSVINCLUDE
2355/*-
2356 *---------------------------------------------------------------------
2357 * ParseTraditionalInclude --
2358 * Push to another file.
2359 *
2360 * The input is the current line. The file name(s) are
2361 * following the "include".
2362 *
2363 * Results:
2364 * None
2365 *
2366 * Side Effects:
2367 * A structure is added to the includes Lst and readProc, lineno,
2368 * fname and curFILE are altered for the new file
2369 *---------------------------------------------------------------------
2370 */
2371static void
2372ParseTraditionalInclude(char *line)
2373{
2374 char *cp; /* current position in file spec */
2375 int done = 0;
2376 int silent = (line[0] != 'i') ? 1 : 0;
2377 char *file = &line[silent + 7];
2378 char *all_files;
2379
2380 if (DEBUG(PARSE)) {
2381 fprintf(debug_file, "ParseTraditionalInclude: %s\n", file);
2382 }
2383
2384 /*
2385 * Skip over whitespace
2386 */
2387 while (isspace((unsigned char)*file))
2388 file++;
2389
2390 /*
2391 * Substitute for any variables in the file name before trying to
2392 * find the thing.
2393 */
2394 all_files = Var_Subst(NULL, file, VAR_CMD, FALSE);
2395
2396 if (*file == '\0') {
2397 Parse_Error(PARSE_FATAL,
2398 "Filename missing from \"include\"");
2399 return;
2400 }
2401
2402 for (file = all_files; !done; file = cp + 1) {
2403 /* Skip to end of line or next whitespace */
2404 for (cp = file; *cp && !isspace((unsigned char) *cp); cp++)
2405 continue;
2406
2407 if (*cp)
2408 *cp = '\0';
2409 else
2410 done = 1;
2411
2412 Parse_include_file(file, FALSE, silent);
2413 }
2414 free(all_files);
2415}
2416#endif
2417
2418#ifdef GMAKEEXPORT
2419/*-
2420 *---------------------------------------------------------------------
2421 * ParseGmakeExport --
2422 * Parse export <variable>=<value>
2423 *
2424 * And set the environment with it.
2425 *
2426 * Results:
2427 * None
2428 *
2429 * Side Effects:
2430 * None
2431 *---------------------------------------------------------------------
2432 */
2433static void
2434ParseGmakeExport(char *line)
2435{
2436 char *variable = &line[6];
2437 char *value;
2438
2439 if (DEBUG(PARSE)) {
2440 fprintf(debug_file, "ParseGmakeExport: %s\n", variable);
2441 }
2442
2443 /*
2444 * Skip over whitespace
2445 */
2446 while (isspace((unsigned char)*variable))
2447 variable++;
2448
2449 for (value = variable; *value && *value != '='; value++)
2450 continue;
2451
2452 if (*value != '=') {
2453 Parse_Error(PARSE_FATAL,
2454 "Variable/Value missing from \"export\"");
2455 return;
2456 }
2457
2458 /*
2459 * Expand the value before putting it in the environment.
2460 */
2461 value = Var_Subst(NULL, value, VAR_CMD, FALSE);
2462 setenv(variable, value, 1);
2463}
2464#endif
2465
2466/*-
2467 *---------------------------------------------------------------------
2468 * ParseEOF --
2469 * Called when EOF is reached in the current file. If we were reading
2470 * an include file, the includes stack is popped and things set up
2471 * to go back to reading the previous file at the previous location.
2472 *
2473 * Results:
2474 * CONTINUE if there's more to do. DONE if not.
2475 *
2476 * Side Effects:
2477 * The old curFILE, is closed. The includes list is shortened.
2478 * lineno, curFILE, and fname are changed if CONTINUE is returned.
2479 *---------------------------------------------------------------------
2480 */
2481static int
2482ParseEOF(void)
2483{
2484 char *ptr;
2485 size_t len;
2486
2487 assert(curFile->nextbuf != NULL);
2488
2489 /* get next input buffer, if any */
2490 ptr = curFile->nextbuf(curFile->nextbuf_arg, &len);
2491 curFile->P_ptr = ptr;
2492 curFile->P_str = ptr;
2493 curFile->P_end = ptr + len;
2494 curFile->lineno = curFile->first_lineno;
2495 if (ptr != NULL) {
2496 /* Iterate again */
2497 return CONTINUE;
2498 }
2499
2500 /* Ensure the makefile (or loop) didn't have mismatched conditionals */
2501 Cond_restore_depth(curFile->cond_depth);
2502
2503 if (curFile->lf != NULL) {
2504 loadedfile_destroy(curFile->lf);
2505 curFile->lf = NULL;
2506 }
2507
2508 /* Dispose of curFile info */
2509 /* Leak curFile->fname because all the gnodes have pointers to it */
2510 free(curFile->P_str);
2511 free(curFile);
2512
2513 curFile = Lst_DeQueue(includes);
2514
2515 if (curFile == NULL) {
2516 /* We've run out of input */
2517 Var_Delete(".PARSEDIR", VAR_GLOBAL);
2518 Var_Delete(".PARSEFILE", VAR_GLOBAL);
2519 return DONE;
2520 }
2521
2522 if (DEBUG(PARSE))
2523 fprintf(debug_file, "ParseEOF: returning to file %s, line %d\n",
2524 curFile->fname, curFile->lineno);
2525
2526 /* Restore the PARSEDIR/PARSEFILE variables */
2527 ParseSetParseFile(curFile->fname);
2528 return (CONTINUE);
2529}
2530
2531#define PARSE_RAW 1
2532#define PARSE_SKIP 2
2533
2534static char *
2535ParseGetLine(int flags, int *length)
2536{
2537 IFile *cf = curFile;
2538 char *ptr;
2539 char ch;
2540 char *line;
2541 char *line_end;
2542 char *escaped;
2543 char *comment;
2544 char *tp;
2545
2546 /* Loop through blank lines and comment lines */
2547 for (;;) {
2548 cf->lineno++;
2549 line = cf->P_ptr;
2550 ptr = line;
2551 line_end = line;
2552 escaped = NULL;
2553 comment = NULL;
2554 for (;;) {
2555 if (cf->P_end != NULL && ptr == cf->P_end) {
2556 /* end of buffer */
2557 ch = 0;
2558 break;
2559 }
2560 ch = *ptr;
2561 if (ch == 0 || (ch == '\\' && ptr[1] == 0)) {
2562 if (cf->P_end == NULL)
2563 /* End of string (aka for loop) data */
2564 break;
2565 if (cf->nextbuf != NULL) {
2566 /*
2567 * End of this buffer; return EOF and outer logic
2568 * will get the next one. (eww)
2569 */
2570 break;
2571 }
2572 Parse_Error(PARSE_FATAL, "Zero byte read from file");
2573 return NULL;
2574 }
2575
2576 if (ch == '\\') {
2577 /* Don't treat next character as special, remember first one */
2578 if (escaped == NULL)
2579 escaped = ptr;
2580 if (ptr[1] == '\n')
2581 cf->lineno++;
2582 ptr += 2;
2583 line_end = ptr;
2584 continue;
2585 }
2586 if (ch == '#' && comment == NULL) {
2587 /* Remember first '#' for comment stripping */
2588 /* Unless previous char was '[', as in modifier :[#] */
2589 if (!(ptr > line && ptr[-1] == '['))
2590 comment = line_end;
2591 }
2592 ptr++;
2593 if (ch == '\n')
2594 break;
2595 if (!isspace((unsigned char)ch))
2596 /* We are not interested in trailing whitespace */
2597 line_end = ptr;
2598 }
2599
2600 /* Save next 'to be processed' location */
2601 cf->P_ptr = ptr;
2602
2603 /* Check we have a non-comment, non-blank line */
2604 if (line_end == line || comment == line) {
2605 if (ch == 0)
2606 /* At end of file */
2607 return NULL;
2608 /* Parse another line */
2609 continue;
2610 }
2611
2612 /* We now have a line of data */
2613 *line_end = 0;
2614
2615 if (flags & PARSE_RAW) {
2616 /* Leave '\' (etc) in line buffer (eg 'for' lines) */
2617 *length = line_end - line;
2618 return line;
2619 }
2620
2621 if (flags & PARSE_SKIP) {
2622 /* Completely ignore non-directives */
2623 if (line[0] != '.')
2624 continue;
2625 /* We could do more of the .else/.elif/.endif checks here */
2626 }
2627 break;
2628 }
2629
2630 /* Brutally ignore anything after a non-escaped '#' in non-commands */
2631 if (comment != NULL && line[0] != '\t') {
2632 line_end = comment;
2633 *line_end = 0;
2634 }
2635
2636 /* If we didn't see a '\\' then the in-situ data is fine */
2637 if (escaped == NULL) {
2638 *length = line_end - line;
2639 return line;
2640 }
2641
2642 /* Remove escapes from '\n' and '#' */
2643 tp = ptr = escaped;
2644 escaped = line;
2645 for (; ; *tp++ = ch) {
2646 ch = *ptr++;
2647 if (ch != '\\') {
2648 if (ch == 0)
2649 break;
2650 continue;
2651 }
2652
2653 ch = *ptr++;
2654 if (ch == 0) {
2655 /* Delete '\\' at end of buffer */
2656 tp--;
2657 break;
2658 }
2659
2660 if (ch == '#' && line[0] != '\t')
2661 /* Delete '\\' from before '#' on non-command lines */
2662 continue;
2663
2664 if (ch != '\n') {
2665 /* Leave '\\' in buffer for later */
2666 *tp++ = '\\';
2667 /* Make sure we don't delete an escaped ' ' from the line end */
2668 escaped = tp + 1;
2669 continue;
2670 }
2671
2672 /* Escaped '\n' replace following whitespace with a single ' ' */
2673 while (ptr[0] == ' ' || ptr[0] == '\t')
2674 ptr++;
2675 ch = ' ';
2676 }
2677
2678 /* Delete any trailing spaces - eg from empty continuations */
2679 while (tp > escaped && isspace((unsigned char)tp[-1]))
2680 tp--;
2681
2682 *tp = 0;
2683 *length = tp - line;
2684 return line;
2685}
2686
2687/*-
2688 *---------------------------------------------------------------------
2689 * ParseReadLine --
2690 * Read an entire line from the input file. Called only by Parse_File.
2691 *
2692 * Results:
2693 * A line w/o its newline
2694 *
2695 * Side Effects:
2696 * Only those associated with reading a character
2697 *---------------------------------------------------------------------
2698 */
2699static char *
2700ParseReadLine(void)
2701{
2702 char *line; /* Result */
2703 int lineLength; /* Length of result */
2704 int lineno; /* Saved line # */
2705 int rval;
2706
2707 for (;;) {
2708 line = ParseGetLine(0, &lineLength);
2709 if (line == NULL)
2710 return NULL;
2711
2712 if (line[0] != '.')
2713 return line;
2714
2715 /*
2716 * The line might be a conditional. Ask the conditional module
2717 * about it and act accordingly
2718 */
2719 switch (Cond_Eval(line)) {
2720 case COND_SKIP:
2721 /* Skip to next conditional that evaluates to COND_PARSE. */
2722 do {
2723 line = ParseGetLine(PARSE_SKIP, &lineLength);
2724 } while (line && Cond_Eval(line) != COND_PARSE);
2725 if (line == NULL)
2726 break;
2727 continue;
2728 case COND_PARSE:
2729 continue;
2730 case COND_INVALID: /* Not a conditional line */
2731 /* Check for .for loops */
2732 rval = For_Eval(line);
2733 if (rval == 0)
2734 /* Not a .for line */
2735 break;
2736 if (rval < 0)
2737 /* Syntax error - error printed, ignore line */
2738 continue;
2739 /* Start of a .for loop */
2740 lineno = curFile->lineno;
2741 /* Accumulate loop lines until matching .endfor */
2742 do {
2743 line = ParseGetLine(PARSE_RAW, &lineLength);
2744 if (line == NULL) {
2745 Parse_Error(PARSE_FATAL,
2746 "Unexpected end of file in for loop.");
2747 break;
2748 }
2749 } while (For_Accum(line));
2750 /* Stash each iteration as a new 'input file' */
2751 For_Run(lineno);
2752 /* Read next line from for-loop buffer */
2753 continue;
2754 }
2755 return (line);
2756 }
2757}
2758
2759/*-
2760 *-----------------------------------------------------------------------
2761 * ParseFinishLine --
2762 * Handle the end of a dependency group.
2763 *
2764 * Results:
2765 * Nothing.
2766 *
2767 * Side Effects:
2768 * inLine set FALSE. 'targets' list destroyed.
2769 *
2770 *-----------------------------------------------------------------------
2771 */
2772static void
2773ParseFinishLine(void)
2774{
2775 if (inLine) {
2776 Lst_ForEach(targets, Suff_EndTransform, NULL);
2777 Lst_Destroy(targets, ParseHasCommands);
2778 targets = NULL;
2779 inLine = FALSE;
2780 }
2781}
2782
2783
2784/*-
2785 *---------------------------------------------------------------------
2786 * Parse_File --
2787 * Parse a file into its component parts, incorporating it into the
2788 * current dependency graph. This is the main function and controls
2789 * almost every other function in this module
2790 *
2791 * Input:
2792 * name the name of the file being read
2793 * fd Open file to makefile to parse
2794 *
2795 * Results:
2796 * None
2797 *
2798 * Side Effects:
2799 * closes fd.
2800 * Loads. Nodes are added to the list of all targets, nodes and links
2801 * are added to the dependency graph. etc. etc. etc.
2802 *---------------------------------------------------------------------
2803 */
2804void
2805Parse_File(const char *name, int fd)
2806{
2807 char *cp; /* pointer into the line */
2808 char *line; /* the line we're working on */
2809 struct loadedfile *lf;
2810
2811 lf = loadfile(name, fd);
2812
2813 inLine = FALSE;
2814 fatals = 0;
2815
2816 if (name == NULL) {
2817 name = "(stdin)";
2818 }
2819
2820 Parse_SetInput(name, 0, -1, loadedfile_nextbuf, lf);
2821 curFile->lf = lf;
2822
2823 do {
2824 for (; (line = ParseReadLine()) != NULL; ) {
2825 if (DEBUG(PARSE))
2826 fprintf(debug_file, "ParseReadLine (%d): '%s'\n",
2827 curFile->lineno, line);
2828 if (*line == '.') {
2829 /*
2830 * Lines that begin with the special character may be
2831 * include or undef directives.
2832 * On the other hand they can be suffix rules (.c.o: ...)
2833 * or just dependencies for filenames that start '.'.
2834 */
2835 for (cp = line + 1; isspace((unsigned char)*cp); cp++) {
2836 continue;
2837 }
2838 if (strncmp(cp, "include", 7) == 0 ||
2839 ((cp[0] == 's' || cp[0] == '-') &&
2840 strncmp(&cp[1], "include", 7) == 0)) {
2841 ParseDoInclude(cp);
2842 continue;
2843 }
2844 if (strncmp(cp, "undef", 5) == 0) {
2845 char *cp2;
2846 for (cp += 5; isspace((unsigned char) *cp); cp++)
2847 continue;
2848 for (cp2 = cp; !isspace((unsigned char) *cp2) &&
2849 (*cp2 != '\0'); cp2++)
2850 continue;
2851 *cp2 = '\0';
2852 Var_Delete(cp, VAR_GLOBAL);
2853 continue;
2854 } else if (strncmp(cp, "export", 6) == 0) {
2855 for (cp += 6; isspace((unsigned char) *cp); cp++)
2856 continue;
2857 Var_Export(cp, 1);
2858 continue;
2859 } else if (strncmp(cp, "unexport", 8) == 0) {
2860 Var_UnExport(cp);
2861 continue;
2862 } else if (strncmp(cp, "info", 4) == 0 ||
2863 strncmp(cp, "error", 5) == 0 ||
2864 strncmp(cp, "warning", 7) == 0) {
2865 if (ParseMessage(cp))
2866 continue;
2867 }
2868 }
2869
2870 if (*line == '\t') {
2871 /*
2872 * If a line starts with a tab, it can only hope to be
2873 * a creation command.
2874 */
2875 cp = line + 1;
2876 shellCommand:
2877 for (; isspace ((unsigned char)*cp); cp++) {
2878 continue;
2879 }
2880 if (*cp) {
2881 if (!inLine)
2882 Parse_Error(PARSE_FATAL,
2883 "Unassociated shell command \"%s\"",
2884 cp);
2885 /*
2886 * So long as it's not a blank line and we're actually
2887 * in a dependency spec, add the command to the list of
2888 * commands of all targets in the dependency spec
2889 */
2890 if (targets) {
2891 cp = bmake_strdup(cp);
2892 Lst_ForEach(targets, ParseAddCmd, cp);
2893#ifdef CLEANUP
2894 Lst_AtEnd(targCmds, cp);
2895#endif
2896 }
2897 }
2898 continue;
2899 }
2900
2901#ifdef SYSVINCLUDE
2902 if (((strncmp(line, "include", 7) == 0 &&
2903 isspace((unsigned char) line[7])) ||
2904 ((line[0] == 's' || line[0] == '-') &&
2905 strncmp(&line[1], "include", 7) == 0 &&
2906 isspace((unsigned char) line[8]))) &&
2907 strchr(line, ':') == NULL) {
2908 /*
2909 * It's an S3/S5-style "include".
2910 */
2911 ParseTraditionalInclude(line);
2912 continue;
2913 }
2914#endif
2915#ifdef GMAKEEXPORT
2916 if (strncmp(line, "export", 6) == 0 &&
2917 isspace((unsigned char) line[6]) &&
2918 strchr(line, ':') == NULL) {
2919 /*
2920 * It's a Gmake "export".
2921 */
2922 ParseGmakeExport(line);
2923 continue;
2924 }
2925#endif
2926 if (Parse_IsVar(line)) {
2927 ParseFinishLine();
2928 Parse_DoVar(line, VAR_GLOBAL);
2929 continue;
2930 }
2931
2932#ifndef POSIX
2933 /*
2934 * To make life easier on novices, if the line is indented we
2935 * first make sure the line has a dependency operator in it.
2936 * If it doesn't have an operator and we're in a dependency
2937 * line's script, we assume it's actually a shell command
2938 * and add it to the current list of targets.
2939 */
2940 cp = line;
2941 if (isspace((unsigned char) line[0])) {
2942 while ((*cp != '\0') && isspace((unsigned char) *cp))
2943 cp++;
2944 while (*cp && (ParseIsEscaped(line, cp) ||
2945 (*cp != ':') && (*cp != '!'))) {
2946 cp++;
2947 }
2948 if (*cp == '\0') {
2949 if (inLine) {
2950 Parse_Error(PARSE_WARNING,
2951 "Shell command needs a leading tab");
2952 goto shellCommand;
2953 }
2954 }
2955 }
2956#endif
2957 ParseFinishLine();
2958
2959 /*
2960 * For some reason - probably to make the parser impossible -
2961 * a ';' can be used to separate commands from dependencies.
2962 * Attempt to avoid ';' inside substitution patterns.
2963 */
2964 {
2965 int level = 0;
2966
2967 for (cp = line; *cp != 0; cp++) {
2968 if (*cp == '\\' && cp[1] != 0) {
2969 cp++;
2970 continue;
2971 }
2972 if (*cp == '$' &&
2973 (cp[1] == '(' || cp[1] == '{')) {
2974 level++;
2975 continue;
2976 }
2977 if (level > 0) {
2978 if (*cp == ')' || *cp == '}') {
2979 level--;
2980 continue;
2981 }
2982 } else if (*cp == ';') {
2983 break;
2984 }
2985 }
2986 }
2987 if (*cp != 0)
2988 /* Terminate the dependency list at the ';' */
2989 *cp++ = 0;
2990 else
2991 cp = NULL;
2992
2993 /*
2994 * We now know it's a dependency line so it needs to have all
2995 * variables expanded before being parsed. Tell the variable
2996 * module to complain if some variable is undefined...
2997 */
2998 line = Var_Subst(NULL, line, VAR_CMD, TRUE);
2999
3000 /*
3001 * Need a non-circular list for the target nodes
3002 */
3003 if (targets)
3004 Lst_Destroy(targets, NULL);
3005
3006 targets = Lst_Init(FALSE);
3007 inLine = TRUE;
3008
3009 ParseDoDependency(line);
3010 free(line);
3011
3012 /* If there were commands after a ';', add them now */
3013 if (cp != NULL) {
3014 goto shellCommand;
3015 }
3016 }
3017 /*
3018 * Reached EOF, but it may be just EOF of an include file...
3019 */
3020 } while (ParseEOF() == CONTINUE);
3021
3022 if (fatals) {
3023 (void)fflush(stdout);
3024 (void)fprintf(stderr,
3025 "%s: Fatal errors encountered -- cannot continue",
3026 progname);
3027 PrintOnError(NULL, NULL);
3028 exit(1);
3029 }
3030}
3031
3032/*-
3033 *---------------------------------------------------------------------
3034 * Parse_Init --
3035 * initialize the parsing module
3036 *
3037 * Results:
3038 * none
3039 *
3040 * Side Effects:
3041 * the parseIncPath list is initialized...
3042 *---------------------------------------------------------------------
3043 */
3044void
3045Parse_Init(void)
3046{
3047 mainNode = NULL;
3048 parseIncPath = Lst_Init(FALSE);
3049 sysIncPath = Lst_Init(FALSE);
3050 defIncPath = Lst_Init(FALSE);
3051 includes = Lst_Init(FALSE);
3052#ifdef CLEANUP
3053 targCmds = Lst_Init(FALSE);
3054#endif
3055}
3056
3057void
3058Parse_End(void)
3059{
3060#ifdef CLEANUP
3061 Lst_Destroy(targCmds, (FreeProc *)free);
3062 if (targets)
3063 Lst_Destroy(targets, NULL);
3064 Lst_Destroy(defIncPath, Dir_Destroy);
3065 Lst_Destroy(sysIncPath, Dir_Destroy);
3066 Lst_Destroy(parseIncPath, Dir_Destroy);
3067 Lst_Destroy(includes, NULL); /* Should be empty now */
3068#endif
3069}
3070
3071
3072/*-
3073 *-----------------------------------------------------------------------
3074 * Parse_MainName --
3075 * Return a Lst of the main target to create for main()'s sake. If
3076 * no such target exists, we Punt with an obnoxious error message.
3077 *
3078 * Results:
3079 * A Lst of the single node to create.
3080 *
3081 * Side Effects:
3082 * None.
3083 *
3084 *-----------------------------------------------------------------------
3085 */
3086Lst
3087Parse_MainName(void)
3088{
3089 Lst mainList; /* result list */
3090
3091 mainList = Lst_Init(FALSE);
3092
3093 if (mainNode == NULL) {
3094 Punt("no target to make.");
3095 /*NOTREACHED*/
3096 } else if (mainNode->type & OP_DOUBLEDEP) {
3097 (void)Lst_AtEnd(mainList, mainNode);
3098 Lst_Concat(mainList, mainNode->cohorts, LST_CONCNEW);
3099 }
3100 else
3101 (void)Lst_AtEnd(mainList, mainNode);
3102 Var_Append(".TARGETS", mainNode->name, VAR_GLOBAL);
3103 return (mainList);
3104}
3105
3106/*-
3107 *-----------------------------------------------------------------------
3108 * ParseMark --
3109 * Add the filename and lineno to the GNode so that we remember
3110 * where it was first defined.
3111 *
3112 * Side Effects:
3113 * None.
3114 *
3115 *-----------------------------------------------------------------------
3116 */
3117static void
3118ParseMark(GNode *gn)
3119{
3120 gn->fname = curFile->fname;
3121 gn->lineno = curFile->lineno;
3122}
| 353static int ParseFindKeyword(const char *);
354static int ParseLinkSrc(void *, void *);
355static int ParseDoOp(void *, void *);
356static void ParseDoSrc(int, const char *);
357static int ParseFindMain(void *, void *);
358static int ParseAddDir(void *, void *);
359static int ParseClearPath(void *, void *);
360static void ParseDoDependency(char *);
361static int ParseAddCmd(void *, void *);
362static void ParseHasCommands(void *);
363static void ParseDoInclude(char *);
364static void ParseSetParseFile(const char *);
365#ifdef SYSVINCLUDE
366static void ParseTraditionalInclude(char *);
367#endif
368#ifdef GMAKEEXPORT
369static void ParseGmakeExport(char *);
370#endif
371static int ParseEOF(void);
372static char *ParseReadLine(void);
373static void ParseFinishLine(void);
374static void ParseMark(GNode *);
375
376////////////////////////////////////////////////////////////
377// file loader
378
379struct loadedfile {
380 const char *path; /* name, for error reports */
381 char *buf; /* contents buffer */
382 size_t len; /* length of contents */
383 size_t maplen; /* length of mmap area, or 0 */
384 Boolean used; /* XXX: have we used the data yet */
385};
386
387/*
388 * Constructor/destructor for loadedfile
389 */
390static struct loadedfile *
391loadedfile_create(const char *path)
392{
393 struct loadedfile *lf;
394
395 lf = bmake_malloc(sizeof(*lf));
396 lf->path = (path == NULL ? "(stdin)" : path);
397 lf->buf = NULL;
398 lf->len = 0;
399 lf->maplen = 0;
400 lf->used = FALSE;
401 return lf;
402}
403
404static void
405loadedfile_destroy(struct loadedfile *lf)
406{
407 if (lf->buf != NULL) {
408 if (lf->maplen > 0) {
409#ifdef HAVE_MMAP
410 munmap(lf->buf, lf->maplen);
411#endif
412 } else {
413 free(lf->buf);
414 }
415 }
416 free(lf);
417}
418
419/*
420 * nextbuf() operation for loadedfile, as needed by the weird and twisted
421 * logic below. Once that's cleaned up, we can get rid of lf->used...
422 */
423static char *
424loadedfile_nextbuf(void *x, size_t *len)
425{
426 struct loadedfile *lf = x;
427
428 if (lf->used) {
429 return NULL;
430 }
431 lf->used = TRUE;
432 *len = lf->len;
433 return lf->buf;
434}
435
436/*
437 * Try to get the size of a file.
438 */
439static ReturnStatus
440load_getsize(int fd, size_t *ret)
441{
442 struct stat st;
443
444 if (fstat(fd, &st) < 0) {
445 return FAILURE;
446 }
447
448 if (!S_ISREG(st.st_mode)) {
449 return FAILURE;
450 }
451
452 /*
453 * st_size is an off_t, which is 64 bits signed; *ret is
454 * size_t, which might be 32 bits unsigned or 64 bits
455 * unsigned. Rather than being elaborate, just punt on
456 * files that are more than 2^31 bytes. We should never
457 * see a makefile that size in practice...
458 *
459 * While we're at it reject negative sizes too, just in case.
460 */
461 if (st.st_size < 0 || st.st_size > 0x7fffffff) {
462 return FAILURE;
463 }
464
465 *ret = (size_t) st.st_size;
466 return SUCCESS;
467}
468
469/*
470 * Read in a file.
471 *
472 * Until the path search logic can be moved under here instead of
473 * being in the caller in another source file, we need to have the fd
474 * passed in already open. Bleh.
475 *
476 * If the path is NULL use stdin and (to insure against fd leaks)
477 * assert that the caller passed in -1.
478 */
479static struct loadedfile *
480loadfile(const char *path, int fd)
481{
482 struct loadedfile *lf;
483#ifdef HAVE_MMAP
484 long pagesize;
485#endif
486 ssize_t result;
487 size_t bufpos;
488
489 lf = loadedfile_create(path);
490
491 if (path == NULL) {
492 assert(fd == -1);
493 fd = STDIN_FILENO;
494 } else {
495#if 0 /* notyet */
496 fd = open(path, O_RDONLY);
497 if (fd < 0) {
498 ...
499 Error("%s: %s", path, strerror(errno));
500 exit(1);
501 }
502#endif
503 }
504
505#ifdef HAVE_MMAP
506 if (load_getsize(fd, &lf->len) == SUCCESS) {
507 /* found a size, try mmap */
508 pagesize = sysconf(_SC_PAGESIZE);
509 if (pagesize <= 0) {
510 pagesize = 0x1000;
511 }
512 /* round size up to a page */
513 lf->maplen = pagesize * ((lf->len + pagesize - 1)/pagesize);
514
515 /*
516 * XXX hack for dealing with empty files; remove when
517 * we're no longer limited by interfacing to the old
518 * logic elsewhere in this file.
519 */
520 if (lf->maplen == 0) {
521 lf->maplen = pagesize;
522 }
523
524 /*
525 * FUTURE: remove PROT_WRITE when the parser no longer
526 * needs to scribble on the input.
527 */
528 lf->buf = mmap(NULL, lf->maplen, PROT_READ|PROT_WRITE,
529 MAP_FILE|MAP_COPY, fd, 0);
530 if (lf->buf != MAP_FAILED) {
531 /* succeeded */
532 if (lf->len == lf->maplen && lf->buf[lf->len - 1] != '\n') {
533 char *b = malloc(lf->len + 1);
534 b[lf->len] = '\n';
535 memcpy(b, lf->buf, lf->len++);
536 munmap(lf->buf, lf->maplen);
537 lf->maplen = 0;
538 lf->buf = b;
539 }
540 goto done;
541 }
542 }
543#endif
544 /* cannot mmap; load the traditional way */
545
546 lf->maplen = 0;
547 lf->len = 1024;
548 lf->buf = bmake_malloc(lf->len);
549
550 bufpos = 0;
551 while (1) {
552 assert(bufpos <= lf->len);
553 if (bufpos == lf->len) {
554 lf->len *= 2;
555 lf->buf = bmake_realloc(lf->buf, lf->len);
556 }
557 result = read(fd, lf->buf + bufpos, lf->len - bufpos);
558 if (result < 0) {
559 Error("%s: read error: %s", path, strerror(errno));
560 exit(1);
561 }
562 if (result == 0) {
563 break;
564 }
565 bufpos += result;
566 }
567 assert(bufpos <= lf->len);
568 lf->len = bufpos;
569
570 /* truncate malloc region to actual length (maybe not useful) */
571 if (lf->len > 0) {
572 lf->buf = bmake_realloc(lf->buf, lf->len);
573 }
574
575#ifdef HAVE_MMAP
576done:
577#endif
578 if (path != NULL) {
579 close(fd);
580 }
581 return lf;
582}
583
584////////////////////////////////////////////////////////////
585// old code
586
587/*-
588 *----------------------------------------------------------------------
589 * ParseIsEscaped --
590 * Check if the current character is escaped on the current line
591 *
592 * Results:
593 * 0 if the character is not backslash escaped, 1 otherwise
594 *
595 * Side Effects:
596 * None
597 *----------------------------------------------------------------------
598 */
599static int
600ParseIsEscaped(const char *line, const char *c)
601{
602 int active = 0;
603 for (;;) {
604 if (line == c)
605 return active;
606 if (*--c != '\\')
607 return active;
608 active = !active;
609 }
610}
611
612/*-
613 *----------------------------------------------------------------------
614 * ParseFindKeyword --
615 * Look in the table of keywords for one matching the given string.
616 *
617 * Input:
618 * str String to find
619 *
620 * Results:
621 * The index of the keyword, or -1 if it isn't there.
622 *
623 * Side Effects:
624 * None
625 *----------------------------------------------------------------------
626 */
627static int
628ParseFindKeyword(const char *str)
629{
630 int start, end, cur;
631 int diff;
632
633 start = 0;
634 end = (sizeof(parseKeywords)/sizeof(parseKeywords[0])) - 1;
635
636 do {
637 cur = start + ((end - start) / 2);
638 diff = strcmp(str, parseKeywords[cur].name);
639
640 if (diff == 0) {
641 return (cur);
642 } else if (diff < 0) {
643 end = cur - 1;
644 } else {
645 start = cur + 1;
646 }
647 } while (start <= end);
648 return (-1);
649}
650
651/*-
652 * ParseVErrorInternal --
653 * Error message abort function for parsing. Prints out the context
654 * of the error (line number and file) as well as the message with
655 * two optional arguments.
656 *
657 * Results:
658 * None
659 *
660 * Side Effects:
661 * "fatals" is incremented if the level is PARSE_FATAL.
662 */
663/* VARARGS */
664static void
665ParseVErrorInternal(FILE *f, const char *cfname, size_t clineno, int type,
666 const char *fmt, va_list ap)
667{
668 static Boolean fatal_warning_error_printed = FALSE;
669
670 (void)fprintf(f, "%s: ", progname);
671
672 if (cfname != NULL) {
673 (void)fprintf(f, "\"");
674 if (*cfname != '/' && strcmp(cfname, "(stdin)") != 0) {
675 char *cp;
676 const char *dir;
677
678 /*
679 * Nothing is more annoying than not knowing
680 * which Makefile is the culprit.
681 */
682 dir = Var_Value(".PARSEDIR", VAR_GLOBAL, &cp);
683 if (dir == NULL || *dir == '\0' ||
684 (*dir == '.' && dir[1] == '\0'))
685 dir = Var_Value(".CURDIR", VAR_GLOBAL, &cp);
686 if (dir == NULL)
687 dir = ".";
688
689 (void)fprintf(f, "%s/%s", dir, cfname);
690 } else
691 (void)fprintf(f, "%s", cfname);
692
693 (void)fprintf(f, "\" line %d: ", (int)clineno);
694 }
695 if (type == PARSE_WARNING)
696 (void)fprintf(f, "warning: ");
697 (void)vfprintf(f, fmt, ap);
698 (void)fprintf(f, "\n");
699 (void)fflush(f);
700 if (type == PARSE_FATAL || parseWarnFatal)
701 fatals += 1;
702 if (parseWarnFatal && !fatal_warning_error_printed) {
703 Error("parsing warnings being treated as errors");
704 fatal_warning_error_printed = TRUE;
705 }
706}
707
708/*-
709 * ParseErrorInternal --
710 * Error function
711 *
712 * Results:
713 * None
714 *
715 * Side Effects:
716 * None
717 */
718/* VARARGS */
719static void
720ParseErrorInternal(const char *cfname, size_t clineno, int type,
721 const char *fmt, ...)
722{
723 va_list ap;
724
725 va_start(ap, fmt);
726 (void)fflush(stdout);
727 ParseVErrorInternal(stderr, cfname, clineno, type, fmt, ap);
728 va_end(ap);
729
730 if (debug_file != stderr && debug_file != stdout) {
731 va_start(ap, fmt);
732 ParseVErrorInternal(debug_file, cfname, clineno, type, fmt, ap);
733 va_end(ap);
734 }
735}
736
737/*-
738 * Parse_Error --
739 * External interface to ParseErrorInternal; uses the default filename
740 * Line number.
741 *
742 * Results:
743 * None
744 *
745 * Side Effects:
746 * None
747 */
748/* VARARGS */
749void
750Parse_Error(int type, const char *fmt, ...)
751{
752 va_list ap;
753 const char *fname;
754 size_t lineno;
755
756 if (curFile == NULL) {
757 fname = NULL;
758 lineno = 0;
759 } else {
760 fname = curFile->fname;
761 lineno = curFile->lineno;
762 }
763
764 va_start(ap, fmt);
765 (void)fflush(stdout);
766 ParseVErrorInternal(stderr, fname, lineno, type, fmt, ap);
767 va_end(ap);
768
769 if (debug_file != stderr && debug_file != stdout) {
770 va_start(ap, fmt);
771 ParseVErrorInternal(debug_file, fname, lineno, type, fmt, ap);
772 va_end(ap);
773 }
774}
775
776
777/*
778 * ParseMessage
779 * Parse a .info .warning or .error directive
780 *
781 * The input is the line minus the ".". We substitute
782 * variables, print the message and exit(1) (for .error) or just print
783 * a warning if the directive is malformed.
784 */
785static Boolean
786ParseMessage(char *line)
787{
788 int mtype;
789
790 switch(*line) {
791 case 'i':
792 mtype = 0;
793 break;
794 case 'w':
795 mtype = PARSE_WARNING;
796 break;
797 case 'e':
798 mtype = PARSE_FATAL;
799 break;
800 default:
801 Parse_Error(PARSE_WARNING, "invalid syntax: \".%s\"", line);
802 return FALSE;
803 }
804
805 while (isalpha((u_char)*line))
806 line++;
807 if (!isspace((u_char)*line))
808 return FALSE; /* not for us */
809 while (isspace((u_char)*line))
810 line++;
811
812 line = Var_Subst(NULL, line, VAR_CMD, 0);
813 Parse_Error(mtype, "%s", line);
814 free(line);
815
816 if (mtype == PARSE_FATAL) {
817 /* Terminate immediately. */
818 exit(1);
819 }
820 return TRUE;
821}
822
823/*-
824 *---------------------------------------------------------------------
825 * ParseLinkSrc --
826 * Link the parent node to its new child. Used in a Lst_ForEach by
827 * ParseDoDependency. If the specType isn't 'Not', the parent
828 * isn't linked as a parent of the child.
829 *
830 * Input:
831 * pgnp The parent node
832 * cgpn The child node
833 *
834 * Results:
835 * Always = 0
836 *
837 * Side Effects:
838 * New elements are added to the parents list of cgn and the
839 * children list of cgn. the unmade field of pgn is updated
840 * to reflect the additional child.
841 *---------------------------------------------------------------------
842 */
843static int
844ParseLinkSrc(void *pgnp, void *cgnp)
845{
846 GNode *pgn = (GNode *)pgnp;
847 GNode *cgn = (GNode *)cgnp;
848
849 if ((pgn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (pgn->cohorts))
850 pgn = (GNode *)Lst_Datum(Lst_Last(pgn->cohorts));
851 (void)Lst_AtEnd(pgn->children, cgn);
852 if (specType == Not)
853 (void)Lst_AtEnd(cgn->parents, pgn);
854 pgn->unmade += 1;
855 if (DEBUG(PARSE)) {
856 fprintf(debug_file, "# ParseLinkSrc: added child %s - %s\n", pgn->name, cgn->name);
857 Targ_PrintNode(pgn, 0);
858 Targ_PrintNode(cgn, 0);
859 }
860 return (0);
861}
862
863/*-
864 *---------------------------------------------------------------------
865 * ParseDoOp --
866 * Apply the parsed operator to the given target node. Used in a
867 * Lst_ForEach call by ParseDoDependency once all targets have
868 * been found and their operator parsed. If the previous and new
869 * operators are incompatible, a major error is taken.
870 *
871 * Input:
872 * gnp The node to which the operator is to be applied
873 * opp The operator to apply
874 *
875 * Results:
876 * Always 0
877 *
878 * Side Effects:
879 * The type field of the node is altered to reflect any new bits in
880 * the op.
881 *---------------------------------------------------------------------
882 */
883static int
884ParseDoOp(void *gnp, void *opp)
885{
886 GNode *gn = (GNode *)gnp;
887 int op = *(int *)opp;
888 /*
889 * If the dependency mask of the operator and the node don't match and
890 * the node has actually had an operator applied to it before, and
891 * the operator actually has some dependency information in it, complain.
892 */
893 if (((op & OP_OPMASK) != (gn->type & OP_OPMASK)) &&
894 !OP_NOP(gn->type) && !OP_NOP(op))
895 {
896 Parse_Error(PARSE_FATAL, "Inconsistent operator for %s", gn->name);
897 return (1);
898 }
899
900 if ((op == OP_DOUBLEDEP) && ((gn->type & OP_OPMASK) == OP_DOUBLEDEP)) {
901 /*
902 * If the node was the object of a :: operator, we need to create a
903 * new instance of it for the children and commands on this dependency
904 * line. The new instance is placed on the 'cohorts' list of the
905 * initial one (note the initial one is not on its own cohorts list)
906 * and the new instance is linked to all parents of the initial
907 * instance.
908 */
909 GNode *cohort;
910
911 /*
912 * Propagate copied bits to the initial node. They'll be propagated
913 * back to the rest of the cohorts later.
914 */
915 gn->type |= op & ~OP_OPMASK;
916
917 cohort = Targ_FindNode(gn->name, TARG_NOHASH);
918 /*
919 * Make the cohort invisible as well to avoid duplicating it into
920 * other variables. True, parents of this target won't tend to do
921 * anything with their local variables, but better safe than
922 * sorry. (I think this is pointless now, since the relevant list
923 * traversals will no longer see this node anyway. -mycroft)
924 */
925 cohort->type = op | OP_INVISIBLE;
926 (void)Lst_AtEnd(gn->cohorts, cohort);
927 cohort->centurion = gn;
928 gn->unmade_cohorts += 1;
929 snprintf(cohort->cohort_num, sizeof cohort->cohort_num, "#%d",
930 gn->unmade_cohorts);
931 } else {
932 /*
933 * We don't want to nuke any previous flags (whatever they were) so we
934 * just OR the new operator into the old
935 */
936 gn->type |= op;
937 }
938
939 return (0);
940}
941
942/*-
943 *---------------------------------------------------------------------
944 * ParseDoSrc --
945 * Given the name of a source, figure out if it is an attribute
946 * and apply it to the targets if it is. Else decide if there is
947 * some attribute which should be applied *to* the source because
948 * of some special target and apply it if so. Otherwise, make the
949 * source be a child of the targets in the list 'targets'
950 *
951 * Input:
952 * tOp operator (if any) from special targets
953 * src name of the source to handle
954 *
955 * Results:
956 * None
957 *
958 * Side Effects:
959 * Operator bits may be added to the list of targets or to the source.
960 * The targets may have a new source added to their lists of children.
961 *---------------------------------------------------------------------
962 */
963static void
964ParseDoSrc(int tOp, const char *src)
965{
966 GNode *gn = NULL;
967 static int wait_number = 0;
968 char wait_src[16];
969
970 if (*src == '.' && isupper ((unsigned char)src[1])) {
971 int keywd = ParseFindKeyword(src);
972 if (keywd != -1) {
973 int op = parseKeywords[keywd].op;
974 if (op != 0) {
975 Lst_ForEach(targets, ParseDoOp, &op);
976 return;
977 }
978 if (parseKeywords[keywd].spec == Wait) {
979 /*
980 * We add a .WAIT node in the dependency list.
981 * After any dynamic dependencies (and filename globbing)
982 * have happened, it is given a dependency on the each
983 * previous child back to and previous .WAIT node.
984 * The next child won't be scheduled until the .WAIT node
985 * is built.
986 * We give each .WAIT node a unique name (mainly for diag).
987 */
988 snprintf(wait_src, sizeof wait_src, ".WAIT_%u", ++wait_number);
989 gn = Targ_FindNode(wait_src, TARG_NOHASH);
990 gn->type = OP_WAIT | OP_PHONY | OP_DEPENDS | OP_NOTMAIN;
991 Lst_ForEach(targets, ParseLinkSrc, gn);
992 return;
993 }
994 }
995 }
996
997 switch (specType) {
998 case Main:
999 /*
1000 * If we have noted the existence of a .MAIN, it means we need
1001 * to add the sources of said target to the list of things
1002 * to create. The string 'src' is likely to be free, so we
1003 * must make a new copy of it. Note that this will only be
1004 * invoked if the user didn't specify a target on the command
1005 * line. This is to allow #ifmake's to succeed, or something...
1006 */
1007 (void)Lst_AtEnd(create, bmake_strdup(src));
1008 /*
1009 * Add the name to the .TARGETS variable as well, so the user can
1010 * employ that, if desired.
1011 */
1012 Var_Append(".TARGETS", src, VAR_GLOBAL);
1013 return;
1014
1015 case Order:
1016 /*
1017 * Create proper predecessor/successor links between the previous
1018 * source and the current one.
1019 */
1020 gn = Targ_FindNode(src, TARG_CREATE);
1021 if (predecessor != NULL) {
1022 (void)Lst_AtEnd(predecessor->order_succ, gn);
1023 (void)Lst_AtEnd(gn->order_pred, predecessor);
1024 if (DEBUG(PARSE)) {
1025 fprintf(debug_file, "# ParseDoSrc: added Order dependency %s - %s\n",
1026 predecessor->name, gn->name);
1027 Targ_PrintNode(predecessor, 0);
1028 Targ_PrintNode(gn, 0);
1029 }
1030 }
1031 /*
1032 * The current source now becomes the predecessor for the next one.
1033 */
1034 predecessor = gn;
1035 break;
1036
1037 default:
1038 /*
1039 * If the source is not an attribute, we need to find/create
1040 * a node for it. After that we can apply any operator to it
1041 * from a special target or link it to its parents, as
1042 * appropriate.
1043 *
1044 * In the case of a source that was the object of a :: operator,
1045 * the attribute is applied to all of its instances (as kept in
1046 * the 'cohorts' list of the node) or all the cohorts are linked
1047 * to all the targets.
1048 */
1049
1050 /* Find/create the 'src' node and attach to all targets */
1051 gn = Targ_FindNode(src, TARG_CREATE);
1052 if (tOp) {
1053 gn->type |= tOp;
1054 } else {
1055 Lst_ForEach(targets, ParseLinkSrc, gn);
1056 }
1057 break;
1058 }
1059}
1060
1061/*-
1062 *-----------------------------------------------------------------------
1063 * ParseFindMain --
1064 * Find a real target in the list and set it to be the main one.
1065 * Called by ParseDoDependency when a main target hasn't been found
1066 * yet.
1067 *
1068 * Input:
1069 * gnp Node to examine
1070 *
1071 * Results:
1072 * 0 if main not found yet, 1 if it is.
1073 *
1074 * Side Effects:
1075 * mainNode is changed and Targ_SetMain is called.
1076 *
1077 *-----------------------------------------------------------------------
1078 */
1079static int
1080ParseFindMain(void *gnp, void *dummy)
1081{
1082 GNode *gn = (GNode *)gnp;
1083 if ((gn->type & OP_NOTARGET) == 0) {
1084 mainNode = gn;
1085 Targ_SetMain(gn);
1086 return (dummy ? 1 : 1);
1087 } else {
1088 return (dummy ? 0 : 0);
1089 }
1090}
1091
1092/*-
1093 *-----------------------------------------------------------------------
1094 * ParseAddDir --
1095 * Front-end for Dir_AddDir to make sure Lst_ForEach keeps going
1096 *
1097 * Results:
1098 * === 0
1099 *
1100 * Side Effects:
1101 * See Dir_AddDir.
1102 *
1103 *-----------------------------------------------------------------------
1104 */
1105static int
1106ParseAddDir(void *path, void *name)
1107{
1108 (void)Dir_AddDir((Lst) path, (char *)name);
1109 return(0);
1110}
1111
1112/*-
1113 *-----------------------------------------------------------------------
1114 * ParseClearPath --
1115 * Front-end for Dir_ClearPath to make sure Lst_ForEach keeps going
1116 *
1117 * Results:
1118 * === 0
1119 *
1120 * Side Effects:
1121 * See Dir_ClearPath
1122 *
1123 *-----------------------------------------------------------------------
1124 */
1125static int
1126ParseClearPath(void *path, void *dummy)
1127{
1128 Dir_ClearPath((Lst) path);
1129 return(dummy ? 0 : 0);
1130}
1131
1132/*-
1133 *---------------------------------------------------------------------
1134 * ParseDoDependency --
1135 * Parse the dependency line in line.
1136 *
1137 * Input:
1138 * line the line to parse
1139 *
1140 * Results:
1141 * None
1142 *
1143 * Side Effects:
1144 * The nodes of the sources are linked as children to the nodes of the
1145 * targets. Some nodes may be created.
1146 *
1147 * We parse a dependency line by first extracting words from the line and
1148 * finding nodes in the list of all targets with that name. This is done
1149 * until a character is encountered which is an operator character. Currently
1150 * these are only ! and :. At this point the operator is parsed and the
1151 * pointer into the line advanced until the first source is encountered.
1152 * The parsed operator is applied to each node in the 'targets' list,
1153 * which is where the nodes found for the targets are kept, by means of
1154 * the ParseDoOp function.
1155 * The sources are read in much the same way as the targets were except
1156 * that now they are expanded using the wildcarding scheme of the C-Shell
1157 * and all instances of the resulting words in the list of all targets
1158 * are found. Each of the resulting nodes is then linked to each of the
1159 * targets as one of its children.
1160 * Certain targets are handled specially. These are the ones detailed
1161 * by the specType variable.
1162 * The storing of transformation rules is also taken care of here.
1163 * A target is recognized as a transformation rule by calling
1164 * Suff_IsTransform. If it is a transformation rule, its node is gotten
1165 * from the suffix module via Suff_AddTransform rather than the standard
1166 * Targ_FindNode in the target module.
1167 *---------------------------------------------------------------------
1168 */
1169static void
1170ParseDoDependency(char *line)
1171{
1172 char *cp; /* our current position */
1173 GNode *gn = NULL; /* a general purpose temporary node */
1174 int op; /* the operator on the line */
1175 char savec; /* a place to save a character */
1176 Lst paths; /* List of search paths to alter when parsing
1177 * a list of .PATH targets */
1178 int tOp; /* operator from special target */
1179 Lst sources; /* list of archive source names after
1180 * expansion */
1181 Lst curTargs; /* list of target names to be found and added
1182 * to the targets list */
1183 char *lstart = line;
1184
1185 if (DEBUG(PARSE))
1186 fprintf(debug_file, "ParseDoDependency(%s)\n", line);
1187 tOp = 0;
1188
1189 specType = Not;
1190 paths = NULL;
1191
1192 curTargs = Lst_Init(FALSE);
1193
1194 do {
1195 for (cp = line; *cp && (ParseIsEscaped(lstart, cp) ||
1196 !(isspace((unsigned char)*cp) ||
1197 *cp == '!' || *cp == ':' || *cp == LPAREN));
1198 cp++) {
1199 if (*cp == '$') {
1200 /*
1201 * Must be a dynamic source (would have been expanded
1202 * otherwise), so call the Var module to parse the puppy
1203 * so we can safely advance beyond it...There should be
1204 * no errors in this, as they would have been discovered
1205 * in the initial Var_Subst and we wouldn't be here.
1206 */
1207 int length;
1208 void *freeIt;
1209 char *result;
1210
1211 result = Var_Parse(cp, VAR_CMD, TRUE, &length, &freeIt);
1212 if (freeIt)
1213 free(freeIt);
1214 cp += length-1;
1215 }
1216 }
1217
1218 if (!ParseIsEscaped(lstart, cp) && *cp == LPAREN) {
1219 /*
1220 * Archives must be handled specially to make sure the OP_ARCHV
1221 * flag is set in their 'type' field, for one thing, and because
1222 * things like "archive(file1.o file2.o file3.o)" are permissible.
1223 * Arch_ParseArchive will set 'line' to be the first non-blank
1224 * after the archive-spec. It creates/finds nodes for the members
1225 * and places them on the given list, returning SUCCESS if all
1226 * went well and FAILURE if there was an error in the
1227 * specification. On error, line should remain untouched.
1228 */
1229 if (Arch_ParseArchive(&line, targets, VAR_CMD) != SUCCESS) {
1230 Parse_Error(PARSE_FATAL,
1231 "Error in archive specification: \"%s\"", line);
1232 goto out;
1233 } else {
1234 continue;
1235 }
1236 }
1237 savec = *cp;
1238
1239 if (!*cp) {
1240 /*
1241 * Ending a dependency line without an operator is a Bozo
1242 * no-no. As a heuristic, this is also often triggered by
1243 * undetected conflicts from cvs/rcs merges.
1244 */
1245 if ((strncmp(line, "<<<<<<", 6) == 0) ||
1246 (strncmp(line, "======", 6) == 0) ||
1247 (strncmp(line, ">>>>>>", 6) == 0))
1248 Parse_Error(PARSE_FATAL,
1249 "Makefile appears to contain unresolved cvs/rcs/??? merge conflicts");
1250 else
1251 Parse_Error(PARSE_FATAL, lstart[0] == '.' ? "Unknown directive"
1252 : "Need an operator");
1253 goto out;
1254 }
1255 *cp = '\0';
1256
1257 /*
1258 * Have a word in line. See if it's a special target and set
1259 * specType to match it.
1260 */
1261 if (*line == '.' && isupper ((unsigned char)line[1])) {
1262 /*
1263 * See if the target is a special target that must have it
1264 * or its sources handled specially.
1265 */
1266 int keywd = ParseFindKeyword(line);
1267 if (keywd != -1) {
1268 if (specType == ExPath && parseKeywords[keywd].spec != ExPath) {
1269 Parse_Error(PARSE_FATAL, "Mismatched special targets");
1270 goto out;
1271 }
1272
1273 specType = parseKeywords[keywd].spec;
1274 tOp = parseKeywords[keywd].op;
1275
1276 /*
1277 * Certain special targets have special semantics:
1278 * .PATH Have to set the dirSearchPath
1279 * variable too
1280 * .MAIN Its sources are only used if
1281 * nothing has been specified to
1282 * create.
1283 * .DEFAULT Need to create a node to hang
1284 * commands on, but we don't want
1285 * it in the graph, nor do we want
1286 * it to be the Main Target, so we
1287 * create it, set OP_NOTMAIN and
1288 * add it to the list, setting
1289 * DEFAULT to the new node for
1290 * later use. We claim the node is
1291 * A transformation rule to make
1292 * life easier later, when we'll
1293 * use Make_HandleUse to actually
1294 * apply the .DEFAULT commands.
1295 * .PHONY The list of targets
1296 * .NOPATH Don't search for file in the path
1297 * .BEGIN
1298 * .END
1299 * .ERROR
1300 * .INTERRUPT Are not to be considered the
1301 * main target.
1302 * .NOTPARALLEL Make only one target at a time.
1303 * .SINGLESHELL Create a shell for each command.
1304 * .ORDER Must set initial predecessor to NULL
1305 */
1306 switch (specType) {
1307 case ExPath:
1308 if (paths == NULL) {
1309 paths = Lst_Init(FALSE);
1310 }
1311 (void)Lst_AtEnd(paths, dirSearchPath);
1312 break;
1313 case Main:
1314 if (!Lst_IsEmpty(create)) {
1315 specType = Not;
1316 }
1317 break;
1318 case Begin:
1319 case End:
1320 case dotError:
1321 case Interrupt:
1322 gn = Targ_FindNode(line, TARG_CREATE);
1323 gn->type |= OP_NOTMAIN|OP_SPECIAL;
1324 (void)Lst_AtEnd(targets, gn);
1325 break;
1326 case Default:
1327 gn = Targ_NewGN(".DEFAULT");
1328 gn->type |= (OP_NOTMAIN|OP_TRANSFORM);
1329 (void)Lst_AtEnd(targets, gn);
1330 DEFAULT = gn;
1331 break;
1332 case NotParallel:
1333 maxJobs = 1;
1334 break;
1335 case SingleShell:
1336 compatMake = TRUE;
1337 break;
1338 case Order:
1339 predecessor = NULL;
1340 break;
1341 default:
1342 break;
1343 }
1344 } else if (strncmp(line, ".PATH", 5) == 0) {
1345 /*
1346 * .PATH<suffix> has to be handled specially.
1347 * Call on the suffix module to give us a path to
1348 * modify.
1349 */
1350 Lst path;
1351
1352 specType = ExPath;
1353 path = Suff_GetPath(&line[5]);
1354 if (path == NULL) {
1355 Parse_Error(PARSE_FATAL,
1356 "Suffix '%s' not defined (yet)",
1357 &line[5]);
1358 goto out;
1359 } else {
1360 if (paths == NULL) {
1361 paths = Lst_Init(FALSE);
1362 }
1363 (void)Lst_AtEnd(paths, path);
1364 }
1365 }
1366 }
1367
1368 /*
1369 * Have word in line. Get or create its node and stick it at
1370 * the end of the targets list
1371 */
1372 if ((specType == Not) && (*line != '\0')) {
1373 if (Dir_HasWildcards(line)) {
1374 /*
1375 * Targets are to be sought only in the current directory,
1376 * so create an empty path for the thing. Note we need to
1377 * use Dir_Destroy in the destruction of the path as the
1378 * Dir module could have added a directory to the path...
1379 */
1380 Lst emptyPath = Lst_Init(FALSE);
1381
1382 Dir_Expand(line, emptyPath, curTargs);
1383
1384 Lst_Destroy(emptyPath, Dir_Destroy);
1385 } else {
1386 /*
1387 * No wildcards, but we want to avoid code duplication,
1388 * so create a list with the word on it.
1389 */
1390 (void)Lst_AtEnd(curTargs, line);
1391 }
1392
1393 while(!Lst_IsEmpty(curTargs)) {
1394 char *targName = (char *)Lst_DeQueue(curTargs);
1395
1396 if (!Suff_IsTransform (targName)) {
1397 gn = Targ_FindNode(targName, TARG_CREATE);
1398 } else {
1399 gn = Suff_AddTransform(targName);
1400 }
1401
1402 (void)Lst_AtEnd(targets, gn);
1403 }
1404 } else if (specType == ExPath && *line != '.' && *line != '\0') {
1405 Parse_Error(PARSE_WARNING, "Extra target (%s) ignored", line);
1406 }
1407
1408 *cp = savec;
1409 /*
1410 * If it is a special type and not .PATH, it's the only target we
1411 * allow on this line...
1412 */
1413 if (specType != Not && specType != ExPath) {
1414 Boolean warning = FALSE;
1415
1416 while (*cp && (ParseIsEscaped(lstart, cp) ||
1417 ((*cp != '!') && (*cp != ':')))) {
1418 if (ParseIsEscaped(lstart, cp) ||
1419 (*cp != ' ' && *cp != '\t')) {
1420 warning = TRUE;
1421 }
1422 cp++;
1423 }
1424 if (warning) {
1425 Parse_Error(PARSE_WARNING, "Extra target ignored");
1426 }
1427 } else {
1428 while (*cp && isspace ((unsigned char)*cp)) {
1429 cp++;
1430 }
1431 }
1432 line = cp;
1433 } while (*line && (ParseIsEscaped(lstart, line) ||
1434 ((*line != '!') && (*line != ':'))));
1435
1436 /*
1437 * Don't need the list of target names anymore...
1438 */
1439 Lst_Destroy(curTargs, NULL);
1440 curTargs = NULL;
1441
1442 if (!Lst_IsEmpty(targets)) {
1443 switch(specType) {
1444 default:
1445 Parse_Error(PARSE_WARNING, "Special and mundane targets don't mix. Mundane ones ignored");
1446 break;
1447 case Default:
1448 case Begin:
1449 case End:
1450 case dotError:
1451 case Interrupt:
1452 /*
1453 * These four create nodes on which to hang commands, so
1454 * targets shouldn't be empty...
1455 */
1456 case Not:
1457 /*
1458 * Nothing special here -- targets can be empty if it wants.
1459 */
1460 break;
1461 }
1462 }
1463
1464 /*
1465 * Have now parsed all the target names. Must parse the operator next. The
1466 * result is left in op .
1467 */
1468 if (*cp == '!') {
1469 op = OP_FORCE;
1470 } else if (*cp == ':') {
1471 if (cp[1] == ':') {
1472 op = OP_DOUBLEDEP;
1473 cp++;
1474 } else {
1475 op = OP_DEPENDS;
1476 }
1477 } else {
1478 Parse_Error(PARSE_FATAL, lstart[0] == '.' ? "Unknown directive"
1479 : "Missing dependency operator");
1480 goto out;
1481 }
1482
1483 cp++; /* Advance beyond operator */
1484
1485 Lst_ForEach(targets, ParseDoOp, &op);
1486
1487 /*
1488 * Get to the first source
1489 */
1490 while (*cp && isspace ((unsigned char)*cp)) {
1491 cp++;
1492 }
1493 line = cp;
1494
1495 /*
1496 * Several special targets take different actions if present with no
1497 * sources:
1498 * a .SUFFIXES line with no sources clears out all old suffixes
1499 * a .PRECIOUS line makes all targets precious
1500 * a .IGNORE line ignores errors for all targets
1501 * a .SILENT line creates silence when making all targets
1502 * a .PATH removes all directories from the search path(s).
1503 */
1504 if (!*line) {
1505 switch (specType) {
1506 case Suffixes:
1507 Suff_ClearSuffixes();
1508 break;
1509 case Precious:
1510 allPrecious = TRUE;
1511 break;
1512 case Ignore:
1513 ignoreErrors = TRUE;
1514 break;
1515 case Silent:
1516 beSilent = TRUE;
1517 break;
1518 case ExPath:
1519 Lst_ForEach(paths, ParseClearPath, NULL);
1520 Dir_SetPATH();
1521 break;
1522#ifdef POSIX
1523 case Posix:
1524 Var_Set("%POSIX", "1003.2", VAR_GLOBAL, 0);
1525 break;
1526#endif
1527 default:
1528 break;
1529 }
1530 } else if (specType == MFlags) {
1531 /*
1532 * Call on functions in main.c to deal with these arguments and
1533 * set the initial character to a null-character so the loop to
1534 * get sources won't get anything
1535 */
1536 Main_ParseArgLine(line);
1537 *line = '\0';
1538 } else if (specType == ExShell) {
1539 if (Job_ParseShell(line) != SUCCESS) {
1540 Parse_Error(PARSE_FATAL, "improper shell specification");
1541 goto out;
1542 }
1543 *line = '\0';
1544 } else if ((specType == NotParallel) || (specType == SingleShell)) {
1545 *line = '\0';
1546 }
1547
1548 /*
1549 * NOW GO FOR THE SOURCES
1550 */
1551 if ((specType == Suffixes) || (specType == ExPath) ||
1552 (specType == Includes) || (specType == Libs) ||
1553 (specType == Null) || (specType == ExObjdir))
1554 {
1555 while (*line) {
1556 /*
1557 * If the target was one that doesn't take files as its sources
1558 * but takes something like suffixes, we take each
1559 * space-separated word on the line as a something and deal
1560 * with it accordingly.
1561 *
1562 * If the target was .SUFFIXES, we take each source as a
1563 * suffix and add it to the list of suffixes maintained by the
1564 * Suff module.
1565 *
1566 * If the target was a .PATH, we add the source as a directory
1567 * to search on the search path.
1568 *
1569 * If it was .INCLUDES, the source is taken to be the suffix of
1570 * files which will be #included and whose search path should
1571 * be present in the .INCLUDES variable.
1572 *
1573 * If it was .LIBS, the source is taken to be the suffix of
1574 * files which are considered libraries and whose search path
1575 * should be present in the .LIBS variable.
1576 *
1577 * If it was .NULL, the source is the suffix to use when a file
1578 * has no valid suffix.
1579 *
1580 * If it was .OBJDIR, the source is a new definition for .OBJDIR,
1581 * and will cause make to do a new chdir to that path.
1582 */
1583 while (*cp && !isspace ((unsigned char)*cp)) {
1584 cp++;
1585 }
1586 savec = *cp;
1587 *cp = '\0';
1588 switch (specType) {
1589 case Suffixes:
1590 Suff_AddSuffix(line, &mainNode);
1591 break;
1592 case ExPath:
1593 Lst_ForEach(paths, ParseAddDir, line);
1594 break;
1595 case Includes:
1596 Suff_AddInclude(line);
1597 break;
1598 case Libs:
1599 Suff_AddLib(line);
1600 break;
1601 case Null:
1602 Suff_SetNull(line);
1603 break;
1604 case ExObjdir:
1605 Main_SetObjdir(line);
1606 break;
1607 default:
1608 break;
1609 }
1610 *cp = savec;
1611 if (savec != '\0') {
1612 cp++;
1613 }
1614 while (*cp && isspace ((unsigned char)*cp)) {
1615 cp++;
1616 }
1617 line = cp;
1618 }
1619 if (paths) {
1620 Lst_Destroy(paths, NULL);
1621 }
1622 if (specType == ExPath)
1623 Dir_SetPATH();
1624 } else {
1625 while (*line) {
1626 /*
1627 * The targets take real sources, so we must beware of archive
1628 * specifications (i.e. things with left parentheses in them)
1629 * and handle them accordingly.
1630 */
1631 for (; *cp && !isspace ((unsigned char)*cp); cp++) {
1632 if ((*cp == LPAREN) && (cp > line) && (cp[-1] != '$')) {
1633 /*
1634 * Only stop for a left parenthesis if it isn't at the
1635 * start of a word (that'll be for variable changes
1636 * later) and isn't preceded by a dollar sign (a dynamic
1637 * source).
1638 */
1639 break;
1640 }
1641 }
1642
1643 if (*cp == LPAREN) {
1644 sources = Lst_Init(FALSE);
1645 if (Arch_ParseArchive(&line, sources, VAR_CMD) != SUCCESS) {
1646 Parse_Error(PARSE_FATAL,
1647 "Error in source archive spec \"%s\"", line);
1648 goto out;
1649 }
1650
1651 while (!Lst_IsEmpty (sources)) {
1652 gn = (GNode *)Lst_DeQueue(sources);
1653 ParseDoSrc(tOp, gn->name);
1654 }
1655 Lst_Destroy(sources, NULL);
1656 cp = line;
1657 } else {
1658 if (*cp) {
1659 *cp = '\0';
1660 cp += 1;
1661 }
1662
1663 ParseDoSrc(tOp, line);
1664 }
1665 while (*cp && isspace ((unsigned char)*cp)) {
1666 cp++;
1667 }
1668 line = cp;
1669 }
1670 }
1671
1672 if (mainNode == NULL) {
1673 /*
1674 * If we have yet to decide on a main target to make, in the
1675 * absence of any user input, we want the first target on
1676 * the first dependency line that is actually a real target
1677 * (i.e. isn't a .USE or .EXEC rule) to be made.
1678 */
1679 Lst_ForEach(targets, ParseFindMain, NULL);
1680 }
1681
1682out:
1683 if (curTargs)
1684 Lst_Destroy(curTargs, NULL);
1685}
1686
1687/*-
1688 *---------------------------------------------------------------------
1689 * Parse_IsVar --
1690 * Return TRUE if the passed line is a variable assignment. A variable
1691 * assignment consists of a single word followed by optional whitespace
1692 * followed by either a += or an = operator.
1693 * This function is used both by the Parse_File function and main when
1694 * parsing the command-line arguments.
1695 *
1696 * Input:
1697 * line the line to check
1698 *
1699 * Results:
1700 * TRUE if it is. FALSE if it ain't
1701 *
1702 * Side Effects:
1703 * none
1704 *---------------------------------------------------------------------
1705 */
1706Boolean
1707Parse_IsVar(char *line)
1708{
1709 Boolean wasSpace = FALSE; /* set TRUE if found a space */
1710 char ch;
1711 int level = 0;
1712#define ISEQOPERATOR(c) \
1713 (((c) == '+') || ((c) == ':') || ((c) == '?') || ((c) == '!'))
1714
1715 /*
1716 * Skip to variable name
1717 */
1718 for (;(*line == ' ') || (*line == '\t'); line++)
1719 continue;
1720
1721 /* Scan for one of the assignment operators outside a variable expansion */
1722 while ((ch = *line++) != 0) {
1723 if (ch == '(' || ch == '{') {
1724 level++;
1725 continue;
1726 }
1727 if (ch == ')' || ch == '}') {
1728 level--;
1729 continue;
1730 }
1731 if (level != 0)
1732 continue;
1733 while (ch == ' ' || ch == '\t') {
1734 ch = *line++;
1735 wasSpace = TRUE;
1736 }
1737 if (ch == '=')
1738 return TRUE;
1739 if (*line == '=' && ISEQOPERATOR(ch))
1740 return TRUE;
1741 if (wasSpace)
1742 return FALSE;
1743 }
1744
1745 return FALSE;
1746}
1747
1748/*-
1749 *---------------------------------------------------------------------
1750 * Parse_DoVar --
1751 * Take the variable assignment in the passed line and do it in the
1752 * global context.
1753 *
1754 * Note: There is a lexical ambiguity with assignment modifier characters
1755 * in variable names. This routine interprets the character before the =
1756 * as a modifier. Therefore, an assignment like
1757 * C++=/usr/bin/CC
1758 * is interpreted as "C+ +=" instead of "C++ =".
1759 *
1760 * Input:
1761 * line a line guaranteed to be a variable assignment.
1762 * This reduces error checks
1763 * ctxt Context in which to do the assignment
1764 *
1765 * Results:
1766 * none
1767 *
1768 * Side Effects:
1769 * the variable structure of the given variable name is altered in the
1770 * global context.
1771 *---------------------------------------------------------------------
1772 */
1773void
1774Parse_DoVar(char *line, GNode *ctxt)
1775{
1776 char *cp; /* pointer into line */
1777 enum {
1778 VAR_SUBST, VAR_APPEND, VAR_SHELL, VAR_NORMAL
1779 } type; /* Type of assignment */
1780 char *opc; /* ptr to operator character to
1781 * null-terminate the variable name */
1782 Boolean freeCp = FALSE; /* TRUE if cp needs to be freed,
1783 * i.e. if any variable expansion was
1784 * performed */
1785 int depth;
1786
1787 /*
1788 * Skip to variable name
1789 */
1790 while ((*line == ' ') || (*line == '\t')) {
1791 line++;
1792 }
1793
1794 /*
1795 * Skip to operator character, nulling out whitespace as we go
1796 * XXX Rather than counting () and {} we should look for $ and
1797 * then expand the variable.
1798 */
1799 for (depth = 0, cp = line + 1; depth != 0 || *cp != '='; cp++) {
1800 if (*cp == '(' || *cp == '{') {
1801 depth++;
1802 continue;
1803 }
1804 if (*cp == ')' || *cp == '}') {
1805 depth--;
1806 continue;
1807 }
1808 if (depth == 0 && isspace ((unsigned char)*cp)) {
1809 *cp = '\0';
1810 }
1811 }
1812 opc = cp-1; /* operator is the previous character */
1813 *cp++ = '\0'; /* nuke the = */
1814
1815 /*
1816 * Check operator type
1817 */
1818 switch (*opc) {
1819 case '+':
1820 type = VAR_APPEND;
1821 *opc = '\0';
1822 break;
1823
1824 case '?':
1825 /*
1826 * If the variable already has a value, we don't do anything.
1827 */
1828 *opc = '\0';
1829 if (Var_Exists(line, ctxt)) {
1830 return;
1831 } else {
1832 type = VAR_NORMAL;
1833 }
1834 break;
1835
1836 case ':':
1837 type = VAR_SUBST;
1838 *opc = '\0';
1839 break;
1840
1841 case '!':
1842 type = VAR_SHELL;
1843 *opc = '\0';
1844 break;
1845
1846 default:
1847#ifdef SUNSHCMD
1848 while (opc > line && *opc != ':')
1849 opc--;
1850
1851 if (strncmp(opc, ":sh", 3) == 0) {
1852 type = VAR_SHELL;
1853 *opc = '\0';
1854 break;
1855 }
1856#endif
1857 type = VAR_NORMAL;
1858 break;
1859 }
1860
1861 while (isspace ((unsigned char)*cp)) {
1862 cp++;
1863 }
1864
1865 if (type == VAR_APPEND) {
1866 Var_Append(line, cp, ctxt);
1867 } else if (type == VAR_SUBST) {
1868 /*
1869 * Allow variables in the old value to be undefined, but leave their
1870 * invocation alone -- this is done by forcing oldVars to be false.
1871 * XXX: This can cause recursive variables, but that's not hard to do,
1872 * and this allows someone to do something like
1873 *
1874 * CFLAGS = $(.INCLUDES)
1875 * CFLAGS := -I.. $(CFLAGS)
1876 *
1877 * And not get an error.
1878 */
1879 Boolean oldOldVars = oldVars;
1880
1881 oldVars = FALSE;
1882
1883 /*
1884 * make sure that we set the variable the first time to nothing
1885 * so that it gets substituted!
1886 */
1887 if (!Var_Exists(line, ctxt))
1888 Var_Set(line, "", ctxt, 0);
1889
1890 cp = Var_Subst(NULL, cp, ctxt, FALSE);
1891 oldVars = oldOldVars;
1892 freeCp = TRUE;
1893
1894 Var_Set(line, cp, ctxt, 0);
1895 } else if (type == VAR_SHELL) {
1896 char *res;
1897 const char *error;
1898
1899 if (strchr(cp, '$') != NULL) {
1900 /*
1901 * There's a dollar sign in the command, so perform variable
1902 * expansion on the whole thing. The resulting string will need
1903 * freeing when we're done, so set freeCmd to TRUE.
1904 */
1905 cp = Var_Subst(NULL, cp, VAR_CMD, TRUE);
1906 freeCp = TRUE;
1907 }
1908
1909 res = Cmd_Exec(cp, &error);
1910 Var_Set(line, res, ctxt, 0);
1911 free(res);
1912
1913 if (error)
1914 Parse_Error(PARSE_WARNING, error, cp);
1915 } else {
1916 /*
1917 * Normal assignment -- just do it.
1918 */
1919 Var_Set(line, cp, ctxt, 0);
1920 }
1921 if (strcmp(line, MAKEOVERRIDES) == 0)
1922 Main_ExportMAKEFLAGS(FALSE); /* re-export MAKEFLAGS */
1923 else if (strcmp(line, ".CURDIR") == 0) {
1924 /*
1925 * Somone is being (too?) clever...
1926 * Let's pretend they know what they are doing and
1927 * re-initialize the 'cur' Path.
1928 */
1929 Dir_InitCur(cp);
1930 Dir_SetPATH();
1931 } else if (strcmp(line, MAKE_JOB_PREFIX) == 0) {
1932 Job_SetPrefix();
1933 } else if (strcmp(line, MAKE_EXPORTED) == 0) {
1934 Var_Export(cp, 0);
1935 }
1936 if (freeCp)
1937 free(cp);
1938}
1939
1940
1941/*-
1942 * ParseAddCmd --
1943 * Lst_ForEach function to add a command line to all targets
1944 *
1945 * Input:
1946 * gnp the node to which the command is to be added
1947 * cmd the command to add
1948 *
1949 * Results:
1950 * Always 0
1951 *
1952 * Side Effects:
1953 * A new element is added to the commands list of the node.
1954 */
1955static int
1956ParseAddCmd(void *gnp, void *cmd)
1957{
1958 GNode *gn = (GNode *)gnp;
1959
1960 /* Add to last (ie current) cohort for :: targets */
1961 if ((gn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (gn->cohorts))
1962 gn = (GNode *)Lst_Datum(Lst_Last(gn->cohorts));
1963
1964 /* if target already supplied, ignore commands */
1965 if (!(gn->type & OP_HAS_COMMANDS)) {
1966 (void)Lst_AtEnd(gn->commands, cmd);
1967 ParseMark(gn);
1968 } else {
1969#ifdef notyet
1970 /* XXX: We cannot do this until we fix the tree */
1971 (void)Lst_AtEnd(gn->commands, cmd);
1972 Parse_Error(PARSE_WARNING,
1973 "overriding commands for target \"%s\"; "
1974 "previous commands defined at %s: %d ignored",
1975 gn->name, gn->fname, gn->lineno);
1976#else
1977 Parse_Error(PARSE_WARNING,
1978 "duplicate script for target \"%s\" ignored",
1979 gn->name);
1980 ParseErrorInternal(gn->fname, gn->lineno, PARSE_WARNING,
1981 "using previous script for \"%s\" defined here",
1982 gn->name);
1983#endif
1984 }
1985 return(0);
1986}
1987
1988/*-
1989 *-----------------------------------------------------------------------
1990 * ParseHasCommands --
1991 * Callback procedure for Parse_File when destroying the list of
1992 * targets on the last dependency line. Marks a target as already
1993 * having commands if it does, to keep from having shell commands
1994 * on multiple dependency lines.
1995 *
1996 * Input:
1997 * gnp Node to examine
1998 *
1999 * Results:
2000 * None
2001 *
2002 * Side Effects:
2003 * OP_HAS_COMMANDS may be set for the target.
2004 *
2005 *-----------------------------------------------------------------------
2006 */
2007static void
2008ParseHasCommands(void *gnp)
2009{
2010 GNode *gn = (GNode *)gnp;
2011 if (!Lst_IsEmpty(gn->commands)) {
2012 gn->type |= OP_HAS_COMMANDS;
2013 }
2014}
2015
2016/*-
2017 *-----------------------------------------------------------------------
2018 * Parse_AddIncludeDir --
2019 * Add a directory to the path searched for included makefiles
2020 * bracketed by double-quotes. Used by functions in main.c
2021 *
2022 * Input:
2023 * dir The name of the directory to add
2024 *
2025 * Results:
2026 * None.
2027 *
2028 * Side Effects:
2029 * The directory is appended to the list.
2030 *
2031 *-----------------------------------------------------------------------
2032 */
2033void
2034Parse_AddIncludeDir(char *dir)
2035{
2036 (void)Dir_AddDir(parseIncPath, dir);
2037}
2038
2039/*-
2040 *---------------------------------------------------------------------
2041 * ParseDoInclude --
2042 * Push to another file.
2043 *
2044 * The input is the line minus the `.'. A file spec is a string
2045 * enclosed in <> or "". The former is looked for only in sysIncPath.
2046 * The latter in . and the directories specified by -I command line
2047 * options
2048 *
2049 * Results:
2050 * None
2051 *
2052 * Side Effects:
2053 * A structure is added to the includes Lst and readProc, lineno,
2054 * fname and curFILE are altered for the new file
2055 *---------------------------------------------------------------------
2056 */
2057
2058static void
2059Parse_include_file(char *file, Boolean isSystem, int silent)
2060{
2061 struct loadedfile *lf;
2062 char *fullname; /* full pathname of file */
2063 char *newName;
2064 char *prefEnd, *incdir;
2065 int fd;
2066 int i;
2067
2068 /*
2069 * Now we know the file's name and its search path, we attempt to
2070 * find the durn thing. A return of NULL indicates the file don't
2071 * exist.
2072 */
2073 fullname = file[0] == '/' ? bmake_strdup(file) : NULL;
2074
2075 if (fullname == NULL && !isSystem) {
2076 /*
2077 * Include files contained in double-quotes are first searched for
2078 * relative to the including file's location. We don't want to
2079 * cd there, of course, so we just tack on the old file's
2080 * leading path components and call Dir_FindFile to see if
2081 * we can locate the beast.
2082 */
2083
2084 incdir = bmake_strdup(curFile->fname);
2085 prefEnd = strrchr(incdir, '/');
2086 if (prefEnd != NULL) {
2087 *prefEnd = '\0';
2088 /* Now do lexical processing of leading "../" on the filename */
2089 for (i = 0; strncmp(file + i, "../", 3) == 0; i += 3) {
2090 prefEnd = strrchr(incdir + 1, '/');
2091 if (prefEnd == NULL || strcmp(prefEnd, "/..") == 0)
2092 break;
2093 *prefEnd = '\0';
2094 }
2095 newName = str_concat(incdir, file + i, STR_ADDSLASH);
2096 fullname = Dir_FindFile(newName, parseIncPath);
2097 if (fullname == NULL)
2098 fullname = Dir_FindFile(newName, dirSearchPath);
2099 free(newName);
2100 }
2101 free(incdir);
2102
2103 if (fullname == NULL) {
2104 /*
2105 * Makefile wasn't found in same directory as included makefile.
2106 * Search for it first on the -I search path,
2107 * then on the .PATH search path, if not found in a -I directory.
2108 * If we have a suffix specific path we should use that.
2109 */
2110 char *suff;
2111 Lst suffPath = NULL;
2112
2113 if ((suff = strrchr(file, '.'))) {
2114 suffPath = Suff_GetPath(suff);
2115 if (suffPath != NULL) {
2116 fullname = Dir_FindFile(file, suffPath);
2117 }
2118 }
2119 if (fullname == NULL) {
2120 fullname = Dir_FindFile(file, parseIncPath);
2121 if (fullname == NULL) {
2122 fullname = Dir_FindFile(file, dirSearchPath);
2123 }
2124 }
2125 }
2126 }
2127
2128 /* Looking for a system file or file still not found */
2129 if (fullname == NULL) {
2130 /*
2131 * Look for it on the system path
2132 */
2133 fullname = Dir_FindFile(file,
2134 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath);
2135 }
2136
2137 if (fullname == NULL) {
2138 if (!silent)
2139 Parse_Error(PARSE_FATAL, "Could not find %s", file);
2140 return;
2141 }
2142
2143 /* Actually open the file... */
2144 fd = open(fullname, O_RDONLY);
2145 if (fd == -1) {
2146 if (!silent)
2147 Parse_Error(PARSE_FATAL, "Cannot open %s", fullname);
2148 free(fullname);
2149 return;
2150 }
2151
2152 /* load it */
2153 lf = loadfile(fullname, fd);
2154
2155 /* Start reading from this file next */
2156 Parse_SetInput(fullname, 0, -1, loadedfile_nextbuf, lf);
2157 curFile->lf = lf;
2158}
2159
2160static void
2161ParseDoInclude(char *line)
2162{
2163 char endc; /* the character which ends the file spec */
2164 char *cp; /* current position in file spec */
2165 int silent = (*line != 'i') ? 1 : 0;
2166 char *file = &line[7 + silent];
2167
2168 /* Skip to delimiter character so we know where to look */
2169 while (*file == ' ' || *file == '\t')
2170 file++;
2171
2172 if (*file != '"' && *file != '<') {
2173 Parse_Error(PARSE_FATAL,
2174 ".include filename must be delimited by '\"' or '<'");
2175 return;
2176 }
2177
2178 /*
2179 * Set the search path on which to find the include file based on the
2180 * characters which bracket its name. Angle-brackets imply it's
2181 * a system Makefile while double-quotes imply it's a user makefile
2182 */
2183 if (*file == '<') {
2184 endc = '>';
2185 } else {
2186 endc = '"';
2187 }
2188
2189 /* Skip to matching delimiter */
2190 for (cp = ++file; *cp && *cp != endc; cp++)
2191 continue;
2192
2193 if (*cp != endc) {
2194 Parse_Error(PARSE_FATAL,
2195 "Unclosed %cinclude filename. '%c' expected",
2196 '.', endc);
2197 return;
2198 }
2199 *cp = '\0';
2200
2201 /*
2202 * Substitute for any variables in the file name before trying to
2203 * find the thing.
2204 */
2205 file = Var_Subst(NULL, file, VAR_CMD, FALSE);
2206
2207 Parse_include_file(file, endc == '>', silent);
2208 free(file);
2209}
2210
2211
2212/*-
2213 *---------------------------------------------------------------------
2214 * ParseSetParseFile --
2215 * Set the .PARSEDIR and .PARSEFILE variables to the dirname and
2216 * basename of the given filename
2217 *
2218 * Results:
2219 * None
2220 *
2221 * Side Effects:
2222 * The .PARSEDIR and .PARSEFILE variables are overwritten by the
2223 * dirname and basename of the given filename.
2224 *---------------------------------------------------------------------
2225 */
2226static void
2227ParseSetParseFile(const char *filename)
2228{
2229 char *slash, *dirname;
2230 const char *pd, *pf;
2231 int len;
2232
2233 slash = strrchr(filename, '/');
2234 if (slash == NULL) {
2235 Var_Set(".PARSEDIR", pd = curdir, VAR_GLOBAL, 0);
2236 Var_Set(".PARSEFILE", pf = filename, VAR_GLOBAL, 0);
2237 dirname= NULL;
2238 } else {
2239 len = slash - filename;
2240 dirname = bmake_malloc(len + 1);
2241 memcpy(dirname, filename, len);
2242 dirname[len] = '\0';
2243 Var_Set(".PARSEDIR", pd = dirname, VAR_GLOBAL, 0);
2244 Var_Set(".PARSEFILE", pf = slash + 1, VAR_GLOBAL, 0);
2245 }
2246 if (DEBUG(PARSE))
2247 fprintf(debug_file, "ParseSetParseFile: ${.PARSEDIR} = `%s' "
2248 "${.PARSEFILE} = `%s'\n", pd, pf);
2249 free(dirname);
2250}
2251
2252/*
2253 * Track the makefiles we read - so makefiles can
2254 * set dependencies on them.
2255 * Avoid adding anything more than once.
2256 */
2257
2258static void
2259ParseTrackInput(const char *name)
2260{
2261 char *old;
2262 char *fp = NULL;
2263 size_t name_len = strlen(name);
2264
2265 old = Var_Value(MAKE_MAKEFILES, VAR_GLOBAL, &fp);
2266 if (old) {
2267 /* does it contain name? */
2268 for (; old != NULL; old = strchr(old, ' ')) {
2269 if (*old == ' ')
2270 old++;
2271 if (memcmp(old, name, name_len) == 0
2272 && (old[name_len] == 0 || old[name_len] == ' '))
2273 goto cleanup;
2274 }
2275 }
2276 Var_Append (MAKE_MAKEFILES, name, VAR_GLOBAL);
2277 cleanup:
2278 if (fp) {
2279 free(fp);
2280 }
2281}
2282
2283
2284/*-
2285 *---------------------------------------------------------------------
2286 * Parse_setInput --
2287 * Start Parsing from the given source
2288 *
2289 * Results:
2290 * None
2291 *
2292 * Side Effects:
2293 * A structure is added to the includes Lst and readProc, lineno,
2294 * fname and curFile are altered for the new file
2295 *---------------------------------------------------------------------
2296 */
2297void
2298Parse_SetInput(const char *name, int line, int fd,
2299 char *(*nextbuf)(void *, size_t *), void *arg)
2300{
2301 char *buf;
2302 size_t len;
2303
2304 if (name == NULL)
2305 name = curFile->fname;
2306 else
2307 ParseTrackInput(name);
2308
2309 if (DEBUG(PARSE))
2310 fprintf(debug_file, "Parse_SetInput: file %s, line %d, fd %d, nextbuf %p, arg %p\n",
2311 name, line, fd, nextbuf, arg);
2312
2313 if (fd == -1 && nextbuf == NULL)
2314 /* sanity */
2315 return;
2316
2317 if (curFile != NULL)
2318 /* Save exiting file info */
2319 Lst_AtFront(includes, curFile);
2320
2321 /* Allocate and fill in new structure */
2322 curFile = bmake_malloc(sizeof *curFile);
2323
2324 /*
2325 * Once the previous state has been saved, we can get down to reading
2326 * the new file. We set up the name of the file to be the absolute
2327 * name of the include file so error messages refer to the right
2328 * place.
2329 */
2330 curFile->fname = name;
2331 curFile->lineno = line;
2332 curFile->first_lineno = line;
2333 curFile->nextbuf = nextbuf;
2334 curFile->nextbuf_arg = arg;
2335 curFile->lf = NULL;
2336
2337 assert(nextbuf != NULL);
2338
2339 /* Get first block of input data */
2340 buf = curFile->nextbuf(curFile->nextbuf_arg, &len);
2341 if (buf == NULL) {
2342 /* Was all a waste of time ... */
2343 free(curFile);
2344 return;
2345 }
2346 curFile->P_str = buf;
2347 curFile->P_ptr = buf;
2348 curFile->P_end = buf+len;
2349
2350 curFile->cond_depth = Cond_save_depth();
2351 ParseSetParseFile(name);
2352}
2353
2354#ifdef SYSVINCLUDE
2355/*-
2356 *---------------------------------------------------------------------
2357 * ParseTraditionalInclude --
2358 * Push to another file.
2359 *
2360 * The input is the current line. The file name(s) are
2361 * following the "include".
2362 *
2363 * Results:
2364 * None
2365 *
2366 * Side Effects:
2367 * A structure is added to the includes Lst and readProc, lineno,
2368 * fname and curFILE are altered for the new file
2369 *---------------------------------------------------------------------
2370 */
2371static void
2372ParseTraditionalInclude(char *line)
2373{
2374 char *cp; /* current position in file spec */
2375 int done = 0;
2376 int silent = (line[0] != 'i') ? 1 : 0;
2377 char *file = &line[silent + 7];
2378 char *all_files;
2379
2380 if (DEBUG(PARSE)) {
2381 fprintf(debug_file, "ParseTraditionalInclude: %s\n", file);
2382 }
2383
2384 /*
2385 * Skip over whitespace
2386 */
2387 while (isspace((unsigned char)*file))
2388 file++;
2389
2390 /*
2391 * Substitute for any variables in the file name before trying to
2392 * find the thing.
2393 */
2394 all_files = Var_Subst(NULL, file, VAR_CMD, FALSE);
2395
2396 if (*file == '\0') {
2397 Parse_Error(PARSE_FATAL,
2398 "Filename missing from \"include\"");
2399 return;
2400 }
2401
2402 for (file = all_files; !done; file = cp + 1) {
2403 /* Skip to end of line or next whitespace */
2404 for (cp = file; *cp && !isspace((unsigned char) *cp); cp++)
2405 continue;
2406
2407 if (*cp)
2408 *cp = '\0';
2409 else
2410 done = 1;
2411
2412 Parse_include_file(file, FALSE, silent);
2413 }
2414 free(all_files);
2415}
2416#endif
2417
2418#ifdef GMAKEEXPORT
2419/*-
2420 *---------------------------------------------------------------------
2421 * ParseGmakeExport --
2422 * Parse export <variable>=<value>
2423 *
2424 * And set the environment with it.
2425 *
2426 * Results:
2427 * None
2428 *
2429 * Side Effects:
2430 * None
2431 *---------------------------------------------------------------------
2432 */
2433static void
2434ParseGmakeExport(char *line)
2435{
2436 char *variable = &line[6];
2437 char *value;
2438
2439 if (DEBUG(PARSE)) {
2440 fprintf(debug_file, "ParseGmakeExport: %s\n", variable);
2441 }
2442
2443 /*
2444 * Skip over whitespace
2445 */
2446 while (isspace((unsigned char)*variable))
2447 variable++;
2448
2449 for (value = variable; *value && *value != '='; value++)
2450 continue;
2451
2452 if (*value != '=') {
2453 Parse_Error(PARSE_FATAL,
2454 "Variable/Value missing from \"export\"");
2455 return;
2456 }
2457
2458 /*
2459 * Expand the value before putting it in the environment.
2460 */
2461 value = Var_Subst(NULL, value, VAR_CMD, FALSE);
2462 setenv(variable, value, 1);
2463}
2464#endif
2465
2466/*-
2467 *---------------------------------------------------------------------
2468 * ParseEOF --
2469 * Called when EOF is reached in the current file. If we were reading
2470 * an include file, the includes stack is popped and things set up
2471 * to go back to reading the previous file at the previous location.
2472 *
2473 * Results:
2474 * CONTINUE if there's more to do. DONE if not.
2475 *
2476 * Side Effects:
2477 * The old curFILE, is closed. The includes list is shortened.
2478 * lineno, curFILE, and fname are changed if CONTINUE is returned.
2479 *---------------------------------------------------------------------
2480 */
2481static int
2482ParseEOF(void)
2483{
2484 char *ptr;
2485 size_t len;
2486
2487 assert(curFile->nextbuf != NULL);
2488
2489 /* get next input buffer, if any */
2490 ptr = curFile->nextbuf(curFile->nextbuf_arg, &len);
2491 curFile->P_ptr = ptr;
2492 curFile->P_str = ptr;
2493 curFile->P_end = ptr + len;
2494 curFile->lineno = curFile->first_lineno;
2495 if (ptr != NULL) {
2496 /* Iterate again */
2497 return CONTINUE;
2498 }
2499
2500 /* Ensure the makefile (or loop) didn't have mismatched conditionals */
2501 Cond_restore_depth(curFile->cond_depth);
2502
2503 if (curFile->lf != NULL) {
2504 loadedfile_destroy(curFile->lf);
2505 curFile->lf = NULL;
2506 }
2507
2508 /* Dispose of curFile info */
2509 /* Leak curFile->fname because all the gnodes have pointers to it */
2510 free(curFile->P_str);
2511 free(curFile);
2512
2513 curFile = Lst_DeQueue(includes);
2514
2515 if (curFile == NULL) {
2516 /* We've run out of input */
2517 Var_Delete(".PARSEDIR", VAR_GLOBAL);
2518 Var_Delete(".PARSEFILE", VAR_GLOBAL);
2519 return DONE;
2520 }
2521
2522 if (DEBUG(PARSE))
2523 fprintf(debug_file, "ParseEOF: returning to file %s, line %d\n",
2524 curFile->fname, curFile->lineno);
2525
2526 /* Restore the PARSEDIR/PARSEFILE variables */
2527 ParseSetParseFile(curFile->fname);
2528 return (CONTINUE);
2529}
2530
2531#define PARSE_RAW 1
2532#define PARSE_SKIP 2
2533
2534static char *
2535ParseGetLine(int flags, int *length)
2536{
2537 IFile *cf = curFile;
2538 char *ptr;
2539 char ch;
2540 char *line;
2541 char *line_end;
2542 char *escaped;
2543 char *comment;
2544 char *tp;
2545
2546 /* Loop through blank lines and comment lines */
2547 for (;;) {
2548 cf->lineno++;
2549 line = cf->P_ptr;
2550 ptr = line;
2551 line_end = line;
2552 escaped = NULL;
2553 comment = NULL;
2554 for (;;) {
2555 if (cf->P_end != NULL && ptr == cf->P_end) {
2556 /* end of buffer */
2557 ch = 0;
2558 break;
2559 }
2560 ch = *ptr;
2561 if (ch == 0 || (ch == '\\' && ptr[1] == 0)) {
2562 if (cf->P_end == NULL)
2563 /* End of string (aka for loop) data */
2564 break;
2565 if (cf->nextbuf != NULL) {
2566 /*
2567 * End of this buffer; return EOF and outer logic
2568 * will get the next one. (eww)
2569 */
2570 break;
2571 }
2572 Parse_Error(PARSE_FATAL, "Zero byte read from file");
2573 return NULL;
2574 }
2575
2576 if (ch == '\\') {
2577 /* Don't treat next character as special, remember first one */
2578 if (escaped == NULL)
2579 escaped = ptr;
2580 if (ptr[1] == '\n')
2581 cf->lineno++;
2582 ptr += 2;
2583 line_end = ptr;
2584 continue;
2585 }
2586 if (ch == '#' && comment == NULL) {
2587 /* Remember first '#' for comment stripping */
2588 /* Unless previous char was '[', as in modifier :[#] */
2589 if (!(ptr > line && ptr[-1] == '['))
2590 comment = line_end;
2591 }
2592 ptr++;
2593 if (ch == '\n')
2594 break;
2595 if (!isspace((unsigned char)ch))
2596 /* We are not interested in trailing whitespace */
2597 line_end = ptr;
2598 }
2599
2600 /* Save next 'to be processed' location */
2601 cf->P_ptr = ptr;
2602
2603 /* Check we have a non-comment, non-blank line */
2604 if (line_end == line || comment == line) {
2605 if (ch == 0)
2606 /* At end of file */
2607 return NULL;
2608 /* Parse another line */
2609 continue;
2610 }
2611
2612 /* We now have a line of data */
2613 *line_end = 0;
2614
2615 if (flags & PARSE_RAW) {
2616 /* Leave '\' (etc) in line buffer (eg 'for' lines) */
2617 *length = line_end - line;
2618 return line;
2619 }
2620
2621 if (flags & PARSE_SKIP) {
2622 /* Completely ignore non-directives */
2623 if (line[0] != '.')
2624 continue;
2625 /* We could do more of the .else/.elif/.endif checks here */
2626 }
2627 break;
2628 }
2629
2630 /* Brutally ignore anything after a non-escaped '#' in non-commands */
2631 if (comment != NULL && line[0] != '\t') {
2632 line_end = comment;
2633 *line_end = 0;
2634 }
2635
2636 /* If we didn't see a '\\' then the in-situ data is fine */
2637 if (escaped == NULL) {
2638 *length = line_end - line;
2639 return line;
2640 }
2641
2642 /* Remove escapes from '\n' and '#' */
2643 tp = ptr = escaped;
2644 escaped = line;
2645 for (; ; *tp++ = ch) {
2646 ch = *ptr++;
2647 if (ch != '\\') {
2648 if (ch == 0)
2649 break;
2650 continue;
2651 }
2652
2653 ch = *ptr++;
2654 if (ch == 0) {
2655 /* Delete '\\' at end of buffer */
2656 tp--;
2657 break;
2658 }
2659
2660 if (ch == '#' && line[0] != '\t')
2661 /* Delete '\\' from before '#' on non-command lines */
2662 continue;
2663
2664 if (ch != '\n') {
2665 /* Leave '\\' in buffer for later */
2666 *tp++ = '\\';
2667 /* Make sure we don't delete an escaped ' ' from the line end */
2668 escaped = tp + 1;
2669 continue;
2670 }
2671
2672 /* Escaped '\n' replace following whitespace with a single ' ' */
2673 while (ptr[0] == ' ' || ptr[0] == '\t')
2674 ptr++;
2675 ch = ' ';
2676 }
2677
2678 /* Delete any trailing spaces - eg from empty continuations */
2679 while (tp > escaped && isspace((unsigned char)tp[-1]))
2680 tp--;
2681
2682 *tp = 0;
2683 *length = tp - line;
2684 return line;
2685}
2686
2687/*-
2688 *---------------------------------------------------------------------
2689 * ParseReadLine --
2690 * Read an entire line from the input file. Called only by Parse_File.
2691 *
2692 * Results:
2693 * A line w/o its newline
2694 *
2695 * Side Effects:
2696 * Only those associated with reading a character
2697 *---------------------------------------------------------------------
2698 */
2699static char *
2700ParseReadLine(void)
2701{
2702 char *line; /* Result */
2703 int lineLength; /* Length of result */
2704 int lineno; /* Saved line # */
2705 int rval;
2706
2707 for (;;) {
2708 line = ParseGetLine(0, &lineLength);
2709 if (line == NULL)
2710 return NULL;
2711
2712 if (line[0] != '.')
2713 return line;
2714
2715 /*
2716 * The line might be a conditional. Ask the conditional module
2717 * about it and act accordingly
2718 */
2719 switch (Cond_Eval(line)) {
2720 case COND_SKIP:
2721 /* Skip to next conditional that evaluates to COND_PARSE. */
2722 do {
2723 line = ParseGetLine(PARSE_SKIP, &lineLength);
2724 } while (line && Cond_Eval(line) != COND_PARSE);
2725 if (line == NULL)
2726 break;
2727 continue;
2728 case COND_PARSE:
2729 continue;
2730 case COND_INVALID: /* Not a conditional line */
2731 /* Check for .for loops */
2732 rval = For_Eval(line);
2733 if (rval == 0)
2734 /* Not a .for line */
2735 break;
2736 if (rval < 0)
2737 /* Syntax error - error printed, ignore line */
2738 continue;
2739 /* Start of a .for loop */
2740 lineno = curFile->lineno;
2741 /* Accumulate loop lines until matching .endfor */
2742 do {
2743 line = ParseGetLine(PARSE_RAW, &lineLength);
2744 if (line == NULL) {
2745 Parse_Error(PARSE_FATAL,
2746 "Unexpected end of file in for loop.");
2747 break;
2748 }
2749 } while (For_Accum(line));
2750 /* Stash each iteration as a new 'input file' */
2751 For_Run(lineno);
2752 /* Read next line from for-loop buffer */
2753 continue;
2754 }
2755 return (line);
2756 }
2757}
2758
2759/*-
2760 *-----------------------------------------------------------------------
2761 * ParseFinishLine --
2762 * Handle the end of a dependency group.
2763 *
2764 * Results:
2765 * Nothing.
2766 *
2767 * Side Effects:
2768 * inLine set FALSE. 'targets' list destroyed.
2769 *
2770 *-----------------------------------------------------------------------
2771 */
2772static void
2773ParseFinishLine(void)
2774{
2775 if (inLine) {
2776 Lst_ForEach(targets, Suff_EndTransform, NULL);
2777 Lst_Destroy(targets, ParseHasCommands);
2778 targets = NULL;
2779 inLine = FALSE;
2780 }
2781}
2782
2783
2784/*-
2785 *---------------------------------------------------------------------
2786 * Parse_File --
2787 * Parse a file into its component parts, incorporating it into the
2788 * current dependency graph. This is the main function and controls
2789 * almost every other function in this module
2790 *
2791 * Input:
2792 * name the name of the file being read
2793 * fd Open file to makefile to parse
2794 *
2795 * Results:
2796 * None
2797 *
2798 * Side Effects:
2799 * closes fd.
2800 * Loads. Nodes are added to the list of all targets, nodes and links
2801 * are added to the dependency graph. etc. etc. etc.
2802 *---------------------------------------------------------------------
2803 */
2804void
2805Parse_File(const char *name, int fd)
2806{
2807 char *cp; /* pointer into the line */
2808 char *line; /* the line we're working on */
2809 struct loadedfile *lf;
2810
2811 lf = loadfile(name, fd);
2812
2813 inLine = FALSE;
2814 fatals = 0;
2815
2816 if (name == NULL) {
2817 name = "(stdin)";
2818 }
2819
2820 Parse_SetInput(name, 0, -1, loadedfile_nextbuf, lf);
2821 curFile->lf = lf;
2822
2823 do {
2824 for (; (line = ParseReadLine()) != NULL; ) {
2825 if (DEBUG(PARSE))
2826 fprintf(debug_file, "ParseReadLine (%d): '%s'\n",
2827 curFile->lineno, line);
2828 if (*line == '.') {
2829 /*
2830 * Lines that begin with the special character may be
2831 * include or undef directives.
2832 * On the other hand they can be suffix rules (.c.o: ...)
2833 * or just dependencies for filenames that start '.'.
2834 */
2835 for (cp = line + 1; isspace((unsigned char)*cp); cp++) {
2836 continue;
2837 }
2838 if (strncmp(cp, "include", 7) == 0 ||
2839 ((cp[0] == 's' || cp[0] == '-') &&
2840 strncmp(&cp[1], "include", 7) == 0)) {
2841 ParseDoInclude(cp);
2842 continue;
2843 }
2844 if (strncmp(cp, "undef", 5) == 0) {
2845 char *cp2;
2846 for (cp += 5; isspace((unsigned char) *cp); cp++)
2847 continue;
2848 for (cp2 = cp; !isspace((unsigned char) *cp2) &&
2849 (*cp2 != '\0'); cp2++)
2850 continue;
2851 *cp2 = '\0';
2852 Var_Delete(cp, VAR_GLOBAL);
2853 continue;
2854 } else if (strncmp(cp, "export", 6) == 0) {
2855 for (cp += 6; isspace((unsigned char) *cp); cp++)
2856 continue;
2857 Var_Export(cp, 1);
2858 continue;
2859 } else if (strncmp(cp, "unexport", 8) == 0) {
2860 Var_UnExport(cp);
2861 continue;
2862 } else if (strncmp(cp, "info", 4) == 0 ||
2863 strncmp(cp, "error", 5) == 0 ||
2864 strncmp(cp, "warning", 7) == 0) {
2865 if (ParseMessage(cp))
2866 continue;
2867 }
2868 }
2869
2870 if (*line == '\t') {
2871 /*
2872 * If a line starts with a tab, it can only hope to be
2873 * a creation command.
2874 */
2875 cp = line + 1;
2876 shellCommand:
2877 for (; isspace ((unsigned char)*cp); cp++) {
2878 continue;
2879 }
2880 if (*cp) {
2881 if (!inLine)
2882 Parse_Error(PARSE_FATAL,
2883 "Unassociated shell command \"%s\"",
2884 cp);
2885 /*
2886 * So long as it's not a blank line and we're actually
2887 * in a dependency spec, add the command to the list of
2888 * commands of all targets in the dependency spec
2889 */
2890 if (targets) {
2891 cp = bmake_strdup(cp);
2892 Lst_ForEach(targets, ParseAddCmd, cp);
2893#ifdef CLEANUP
2894 Lst_AtEnd(targCmds, cp);
2895#endif
2896 }
2897 }
2898 continue;
2899 }
2900
2901#ifdef SYSVINCLUDE
2902 if (((strncmp(line, "include", 7) == 0 &&
2903 isspace((unsigned char) line[7])) ||
2904 ((line[0] == 's' || line[0] == '-') &&
2905 strncmp(&line[1], "include", 7) == 0 &&
2906 isspace((unsigned char) line[8]))) &&
2907 strchr(line, ':') == NULL) {
2908 /*
2909 * It's an S3/S5-style "include".
2910 */
2911 ParseTraditionalInclude(line);
2912 continue;
2913 }
2914#endif
2915#ifdef GMAKEEXPORT
2916 if (strncmp(line, "export", 6) == 0 &&
2917 isspace((unsigned char) line[6]) &&
2918 strchr(line, ':') == NULL) {
2919 /*
2920 * It's a Gmake "export".
2921 */
2922 ParseGmakeExport(line);
2923 continue;
2924 }
2925#endif
2926 if (Parse_IsVar(line)) {
2927 ParseFinishLine();
2928 Parse_DoVar(line, VAR_GLOBAL);
2929 continue;
2930 }
2931
2932#ifndef POSIX
2933 /*
2934 * To make life easier on novices, if the line is indented we
2935 * first make sure the line has a dependency operator in it.
2936 * If it doesn't have an operator and we're in a dependency
2937 * line's script, we assume it's actually a shell command
2938 * and add it to the current list of targets.
2939 */
2940 cp = line;
2941 if (isspace((unsigned char) line[0])) {
2942 while ((*cp != '\0') && isspace((unsigned char) *cp))
2943 cp++;
2944 while (*cp && (ParseIsEscaped(line, cp) ||
2945 (*cp != ':') && (*cp != '!'))) {
2946 cp++;
2947 }
2948 if (*cp == '\0') {
2949 if (inLine) {
2950 Parse_Error(PARSE_WARNING,
2951 "Shell command needs a leading tab");
2952 goto shellCommand;
2953 }
2954 }
2955 }
2956#endif
2957 ParseFinishLine();
2958
2959 /*
2960 * For some reason - probably to make the parser impossible -
2961 * a ';' can be used to separate commands from dependencies.
2962 * Attempt to avoid ';' inside substitution patterns.
2963 */
2964 {
2965 int level = 0;
2966
2967 for (cp = line; *cp != 0; cp++) {
2968 if (*cp == '\\' && cp[1] != 0) {
2969 cp++;
2970 continue;
2971 }
2972 if (*cp == '$' &&
2973 (cp[1] == '(' || cp[1] == '{')) {
2974 level++;
2975 continue;
2976 }
2977 if (level > 0) {
2978 if (*cp == ')' || *cp == '}') {
2979 level--;
2980 continue;
2981 }
2982 } else if (*cp == ';') {
2983 break;
2984 }
2985 }
2986 }
2987 if (*cp != 0)
2988 /* Terminate the dependency list at the ';' */
2989 *cp++ = 0;
2990 else
2991 cp = NULL;
2992
2993 /*
2994 * We now know it's a dependency line so it needs to have all
2995 * variables expanded before being parsed. Tell the variable
2996 * module to complain if some variable is undefined...
2997 */
2998 line = Var_Subst(NULL, line, VAR_CMD, TRUE);
2999
3000 /*
3001 * Need a non-circular list for the target nodes
3002 */
3003 if (targets)
3004 Lst_Destroy(targets, NULL);
3005
3006 targets = Lst_Init(FALSE);
3007 inLine = TRUE;
3008
3009 ParseDoDependency(line);
3010 free(line);
3011
3012 /* If there were commands after a ';', add them now */
3013 if (cp != NULL) {
3014 goto shellCommand;
3015 }
3016 }
3017 /*
3018 * Reached EOF, but it may be just EOF of an include file...
3019 */
3020 } while (ParseEOF() == CONTINUE);
3021
3022 if (fatals) {
3023 (void)fflush(stdout);
3024 (void)fprintf(stderr,
3025 "%s: Fatal errors encountered -- cannot continue",
3026 progname);
3027 PrintOnError(NULL, NULL);
3028 exit(1);
3029 }
3030}
3031
3032/*-
3033 *---------------------------------------------------------------------
3034 * Parse_Init --
3035 * initialize the parsing module
3036 *
3037 * Results:
3038 * none
3039 *
3040 * Side Effects:
3041 * the parseIncPath list is initialized...
3042 *---------------------------------------------------------------------
3043 */
3044void
3045Parse_Init(void)
3046{
3047 mainNode = NULL;
3048 parseIncPath = Lst_Init(FALSE);
3049 sysIncPath = Lst_Init(FALSE);
3050 defIncPath = Lst_Init(FALSE);
3051 includes = Lst_Init(FALSE);
3052#ifdef CLEANUP
3053 targCmds = Lst_Init(FALSE);
3054#endif
3055}
3056
3057void
3058Parse_End(void)
3059{
3060#ifdef CLEANUP
3061 Lst_Destroy(targCmds, (FreeProc *)free);
3062 if (targets)
3063 Lst_Destroy(targets, NULL);
3064 Lst_Destroy(defIncPath, Dir_Destroy);
3065 Lst_Destroy(sysIncPath, Dir_Destroy);
3066 Lst_Destroy(parseIncPath, Dir_Destroy);
3067 Lst_Destroy(includes, NULL); /* Should be empty now */
3068#endif
3069}
3070
3071
3072/*-
3073 *-----------------------------------------------------------------------
3074 * Parse_MainName --
3075 * Return a Lst of the main target to create for main()'s sake. If
3076 * no such target exists, we Punt with an obnoxious error message.
3077 *
3078 * Results:
3079 * A Lst of the single node to create.
3080 *
3081 * Side Effects:
3082 * None.
3083 *
3084 *-----------------------------------------------------------------------
3085 */
3086Lst
3087Parse_MainName(void)
3088{
3089 Lst mainList; /* result list */
3090
3091 mainList = Lst_Init(FALSE);
3092
3093 if (mainNode == NULL) {
3094 Punt("no target to make.");
3095 /*NOTREACHED*/
3096 } else if (mainNode->type & OP_DOUBLEDEP) {
3097 (void)Lst_AtEnd(mainList, mainNode);
3098 Lst_Concat(mainList, mainNode->cohorts, LST_CONCNEW);
3099 }
3100 else
3101 (void)Lst_AtEnd(mainList, mainNode);
3102 Var_Append(".TARGETS", mainNode->name, VAR_GLOBAL);
3103 return (mainList);
3104}
3105
3106/*-
3107 *-----------------------------------------------------------------------
3108 * ParseMark --
3109 * Add the filename and lineno to the GNode so that we remember
3110 * where it was first defined.
3111 *
3112 * Side Effects:
3113 * None.
3114 *
3115 *-----------------------------------------------------------------------
3116 */
3117static void
3118ParseMark(GNode *gn)
3119{
3120 gn->fname = curFile->fname;
3121 gn->lineno = curFile->lineno;
3122}
|