parse.c revision 255253
1/* $NetBSD: parse.c,v 1.191 2013/08/28 21:56:49 sjg Exp $ */ 2 3/* 4 * Copyright (c) 1988, 1989, 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Adam de Boor. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35/* 36 * Copyright (c) 1989 by Berkeley Softworks 37 * All rights reserved. 38 * 39 * This code is derived from software contributed to Berkeley by 40 * Adam de Boor. 41 * 42 * Redistribution and use in source and binary forms, with or without 43 * modification, are permitted provided that the following conditions 44 * are met: 45 * 1. Redistributions of source code must retain the above copyright 46 * notice, this list of conditions and the following disclaimer. 47 * 2. Redistributions in binary form must reproduce the above copyright 48 * notice, this list of conditions and the following disclaimer in the 49 * documentation and/or other materials provided with the distribution. 50 * 3. All advertising materials mentioning features or use of this software 51 * must display the following acknowledgement: 52 * This product includes software developed by the University of 53 * California, Berkeley and its contributors. 54 * 4. Neither the name of the University nor the names of its contributors 55 * may be used to endorse or promote products derived from this software 56 * without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 68 * SUCH DAMAGE. 69 */ 70 71#ifndef MAKE_NATIVE 72static char rcsid[] = "$NetBSD: parse.c,v 1.191 2013/08/28 21:56:49 sjg Exp $"; 73#else 74#include <sys/cdefs.h> 75#ifndef lint 76#if 0 77static char sccsid[] = "@(#)parse.c 8.3 (Berkeley) 3/19/94"; 78#else 79__RCSID("$NetBSD: parse.c,v 1.191 2013/08/28 21:56:49 sjg Exp $"); 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 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 Stale, /* .STALE */ 217 Suffixes, /* .SUFFIXES */ 218 Wait, /* .WAIT */ 219 Attribute /* Generic attribute */ 220} ParseSpecial; 221 222/* 223 * Other tokens 224 */ 225#define LPAREN '(' 226#define RPAREN ')' 227 228 229//////////////////////////////////////////////////////////// 230// result data 231 232/* 233 * The main target to create. This is the first target on the first 234 * dependency line in the first makefile. 235 */ 236static GNode *mainNode; 237 238//////////////////////////////////////////////////////////// 239// eval state 240 241/* targets we're working on */ 242static Lst targets; 243 244#ifdef CLEANUP 245/* command lines for targets */ 246static Lst targCmds; 247#endif 248 249/* 250 * specType contains the SPECial TYPE of the current target. It is 251 * Not if the target is unspecial. If it *is* special, however, the children 252 * are linked as children of the parent but not vice versa. This variable is 253 * set in ParseDoDependency 254 */ 255static ParseSpecial specType; 256 257/* 258 * Predecessor node for handling .ORDER. Initialized to NULL when .ORDER 259 * seen, then set to each successive source on the line. 260 */ 261static GNode *predecessor; 262 263//////////////////////////////////////////////////////////// 264// parser state 265 266/* true if currently in a dependency line or its commands */ 267static Boolean inLine; 268 269/* number of fatal errors */ 270static int fatals = 0; 271 272/* 273 * Variables for doing includes 274 */ 275 276/* current file being read */ 277static IFile *curFile; 278 279/* stack of IFiles generated by .includes */ 280static Lst includes; 281 282/* include paths (lists of directories) */ 283Lst parseIncPath; /* dirs for "..." includes */ 284Lst sysIncPath; /* dirs for <...> includes */ 285Lst defIncPath; /* default for sysIncPath */ 286 287//////////////////////////////////////////////////////////// 288// parser tables 289 290/* 291 * The parseKeywords table is searched using binary search when deciding 292 * if a target or source is special. The 'spec' field is the ParseSpecial 293 * type of the keyword ("Not" if the keyword isn't special as a target) while 294 * the 'op' field is the operator to apply to the list of targets if the 295 * keyword is used as a source ("0" if the keyword isn't special as a source) 296 */ 297static const struct { 298 const char *name; /* Name of keyword */ 299 ParseSpecial spec; /* Type when used as a target */ 300 int op; /* Operator when used as a source */ 301} parseKeywords[] = { 302{ ".BEGIN", Begin, 0 }, 303{ ".DEFAULT", Default, 0 }, 304{ ".END", End, 0 }, 305{ ".ERROR", dotError, 0 }, 306{ ".EXEC", Attribute, OP_EXEC }, 307{ ".IGNORE", Ignore, OP_IGNORE }, 308{ ".INCLUDES", Includes, 0 }, 309{ ".INTERRUPT", Interrupt, 0 }, 310{ ".INVISIBLE", Attribute, OP_INVISIBLE }, 311{ ".JOIN", Attribute, OP_JOIN }, 312{ ".LIBS", Libs, 0 }, 313{ ".MADE", Attribute, OP_MADE }, 314{ ".MAIN", Main, 0 }, 315{ ".MAKE", Attribute, OP_MAKE }, 316{ ".MAKEFLAGS", MFlags, 0 }, 317{ ".META", Meta, OP_META }, 318{ ".MFLAGS", MFlags, 0 }, 319{ ".NOMETA", NoMeta, OP_NOMETA }, 320{ ".NOMETA_CMP", NoMetaCmp, OP_NOMETA_CMP }, 321{ ".NOPATH", NoPath, OP_NOPATH }, 322{ ".NOTMAIN", Attribute, OP_NOTMAIN }, 323{ ".NOTPARALLEL", NotParallel, 0 }, 324{ ".NO_PARALLEL", NotParallel, 0 }, 325{ ".NULL", Null, 0 }, 326{ ".OBJDIR", ExObjdir, 0 }, 327{ ".OPTIONAL", Attribute, OP_OPTIONAL }, 328{ ".ORDER", Order, 0 }, 329{ ".PARALLEL", Parallel, 0 }, 330{ ".PATH", ExPath, 0 }, 331{ ".PHONY", Phony, OP_PHONY }, 332#ifdef POSIX 333{ ".POSIX", Posix, 0 }, 334#endif 335{ ".PRECIOUS", Precious, OP_PRECIOUS }, 336{ ".RECURSIVE", Attribute, OP_MAKE }, 337{ ".SHELL", ExShell, 0 }, 338{ ".SILENT", Silent, OP_SILENT }, 339{ ".SINGLESHELL", SingleShell, 0 }, 340{ ".STALE", Stale, 0 }, 341{ ".SUFFIXES", Suffixes, 0 }, 342{ ".USE", Attribute, OP_USE }, 343{ ".USEBEFORE", Attribute, OP_USEBEFORE }, 344{ ".WAIT", Wait, 0 }, 345}; 346 347//////////////////////////////////////////////////////////// 348// local functions 349 350static int ParseIsEscaped(const char *, const char *); 351static void ParseErrorInternal(const char *, size_t, int, const char *, ...) 352 MAKE_ATTR_PRINTFLIKE(4,5); 353static void ParseVErrorInternal(FILE *, const char *, size_t, int, const char *, va_list) 354 MAKE_ATTR_PRINTFLIKE(5, 0); 355static int ParseFindKeyword(const char *); 356static int ParseLinkSrc(void *, void *); 357static int ParseDoOp(void *, void *); 358static void ParseDoSrc(int, const char *); 359static int ParseFindMain(void *, void *); 360static int ParseAddDir(void *, void *); 361static int ParseClearPath(void *, void *); 362static void ParseDoDependency(char *); 363static int ParseAddCmd(void *, void *); 364static void ParseHasCommands(void *); 365static void ParseDoInclude(char *); 366static void ParseSetParseFile(const char *); 367#ifdef SYSVINCLUDE 368static void ParseTraditionalInclude(char *); 369#endif 370#ifdef GMAKEEXPORT 371static void ParseGmakeExport(char *); 372#endif 373static int ParseEOF(void); 374static char *ParseReadLine(void); 375static void ParseFinishLine(void); 376static void ParseMark(GNode *); 377 378//////////////////////////////////////////////////////////// 379// file loader 380 381struct loadedfile { 382 const char *path; /* name, for error reports */ 383 char *buf; /* contents buffer */ 384 size_t len; /* length of contents */ 385 size_t maplen; /* length of mmap area, or 0 */ 386 Boolean used; /* XXX: have we used the data yet */ 387}; 388 389/* 390 * Constructor/destructor for loadedfile 391 */ 392static struct loadedfile * 393loadedfile_create(const char *path) 394{ 395 struct loadedfile *lf; 396 397 lf = bmake_malloc(sizeof(*lf)); 398 lf->path = (path == NULL ? "(stdin)" : path); 399 lf->buf = NULL; 400 lf->len = 0; 401 lf->maplen = 0; 402 lf->used = FALSE; 403 return lf; 404} 405 406static void 407loadedfile_destroy(struct loadedfile *lf) 408{ 409 if (lf->buf != NULL) { 410 if (lf->maplen > 0) { 411#ifdef HAVE_MMAP 412 munmap(lf->buf, lf->maplen); 413#endif 414 } else { 415 free(lf->buf); 416 } 417 } 418 free(lf); 419} 420 421/* 422 * nextbuf() operation for loadedfile, as needed by the weird and twisted 423 * logic below. Once that's cleaned up, we can get rid of lf->used... 424 */ 425static char * 426loadedfile_nextbuf(void *x, size_t *len) 427{ 428 struct loadedfile *lf = x; 429 430 if (lf->used) { 431 return NULL; 432 } 433 lf->used = TRUE; 434 *len = lf->len; 435 return lf->buf; 436} 437 438/* 439 * Try to get the size of a file. 440 */ 441static ReturnStatus 442load_getsize(int fd, size_t *ret) 443{ 444 struct stat st; 445 446 if (fstat(fd, &st) < 0) { 447 return FAILURE; 448 } 449 450 if (!S_ISREG(st.st_mode)) { 451 return FAILURE; 452 } 453 454 /* 455 * st_size is an off_t, which is 64 bits signed; *ret is 456 * size_t, which might be 32 bits unsigned or 64 bits 457 * unsigned. Rather than being elaborate, just punt on 458 * files that are more than 2^31 bytes. We should never 459 * see a makefile that size in practice... 460 * 461 * While we're at it reject negative sizes too, just in case. 462 */ 463 if (st.st_size < 0 || st.st_size > 0x7fffffff) { 464 return FAILURE; 465 } 466 467 *ret = (size_t) st.st_size; 468 return SUCCESS; 469} 470 471/* 472 * Read in a file. 473 * 474 * Until the path search logic can be moved under here instead of 475 * being in the caller in another source file, we need to have the fd 476 * passed in already open. Bleh. 477 * 478 * If the path is NULL use stdin and (to insure against fd leaks) 479 * assert that the caller passed in -1. 480 */ 481static struct loadedfile * 482loadfile(const char *path, int fd) 483{ 484 struct loadedfile *lf; 485#ifdef HAVE_MMAP 486 long pagesize; 487#endif 488 ssize_t result; 489 size_t bufpos; 490 491 lf = loadedfile_create(path); 492 493 if (path == NULL) { 494 assert(fd == -1); 495 fd = STDIN_FILENO; 496 } else { 497#if 0 /* notyet */ 498 fd = open(path, O_RDONLY); 499 if (fd < 0) { 500 ... 501 Error("%s: %s", path, strerror(errno)); 502 exit(1); 503 } 504#endif 505 } 506 507#ifdef HAVE_MMAP 508 if (load_getsize(fd, &lf->len) == SUCCESS) { 509 /* found a size, try mmap */ 510 pagesize = sysconf(_SC_PAGESIZE); 511 if (pagesize <= 0) { 512 pagesize = 0x1000; 513 } 514 /* round size up to a page */ 515 lf->maplen = pagesize * ((lf->len + pagesize - 1)/pagesize); 516 517 /* 518 * XXX hack for dealing with empty files; remove when 519 * we're no longer limited by interfacing to the old 520 * logic elsewhere in this file. 521 */ 522 if (lf->maplen == 0) { 523 lf->maplen = pagesize; 524 } 525 526 /* 527 * FUTURE: remove PROT_WRITE when the parser no longer 528 * needs to scribble on the input. 529 */ 530 lf->buf = mmap(NULL, lf->maplen, PROT_READ|PROT_WRITE, 531 MAP_FILE|MAP_COPY, fd, 0); 532 if (lf->buf != MAP_FAILED) { 533 /* succeeded */ 534 if (lf->len == lf->maplen && lf->buf[lf->len - 1] != '\n') { 535 char *b = malloc(lf->len + 1); 536 b[lf->len] = '\n'; 537 memcpy(b, lf->buf, lf->len++); 538 munmap(lf->buf, lf->maplen); 539 lf->maplen = 0; 540 lf->buf = b; 541 } 542 goto done; 543 } 544 } 545#endif 546 /* cannot mmap; load the traditional way */ 547 548 lf->maplen = 0; 549 lf->len = 1024; 550 lf->buf = bmake_malloc(lf->len); 551 552 bufpos = 0; 553 while (1) { 554 assert(bufpos <= lf->len); 555 if (bufpos == lf->len) { 556 lf->len *= 2; 557 lf->buf = bmake_realloc(lf->buf, lf->len); 558 } 559 result = read(fd, lf->buf + bufpos, lf->len - bufpos); 560 if (result < 0) { 561 Error("%s: read error: %s", path, strerror(errno)); 562 exit(1); 563 } 564 if (result == 0) { 565 break; 566 } 567 bufpos += result; 568 } 569 assert(bufpos <= lf->len); 570 lf->len = bufpos; 571 572 /* truncate malloc region to actual length (maybe not useful) */ 573 if (lf->len > 0) { 574 lf->buf = bmake_realloc(lf->buf, lf->len); 575 } 576 577#ifdef HAVE_MMAP 578done: 579#endif 580 if (path != NULL) { 581 close(fd); 582 } 583 return lf; 584} 585 586//////////////////////////////////////////////////////////// 587// old code 588 589/*- 590 *---------------------------------------------------------------------- 591 * ParseIsEscaped -- 592 * Check if the current character is escaped on the current line 593 * 594 * Results: 595 * 0 if the character is not backslash escaped, 1 otherwise 596 * 597 * Side Effects: 598 * None 599 *---------------------------------------------------------------------- 600 */ 601static int 602ParseIsEscaped(const char *line, const char *c) 603{ 604 int active = 0; 605 for (;;) { 606 if (line == c) 607 return active; 608 if (*--c != '\\') 609 return active; 610 active = !active; 611 } 612} 613 614/*- 615 *---------------------------------------------------------------------- 616 * ParseFindKeyword -- 617 * Look in the table of keywords for one matching the given string. 618 * 619 * Input: 620 * str String to find 621 * 622 * Results: 623 * The index of the keyword, or -1 if it isn't there. 624 * 625 * Side Effects: 626 * None 627 *---------------------------------------------------------------------- 628 */ 629static int 630ParseFindKeyword(const char *str) 631{ 632 int start, end, cur; 633 int diff; 634 635 start = 0; 636 end = (sizeof(parseKeywords)/sizeof(parseKeywords[0])) - 1; 637 638 do { 639 cur = start + ((end - start) / 2); 640 diff = strcmp(str, parseKeywords[cur].name); 641 642 if (diff == 0) { 643 return (cur); 644 } else if (diff < 0) { 645 end = cur - 1; 646 } else { 647 start = cur + 1; 648 } 649 } while (start <= end); 650 return (-1); 651} 652 653/*- 654 * ParseVErrorInternal -- 655 * Error message abort function for parsing. Prints out the context 656 * of the error (line number and file) as well as the message with 657 * two optional arguments. 658 * 659 * Results: 660 * None 661 * 662 * Side Effects: 663 * "fatals" is incremented if the level is PARSE_FATAL. 664 */ 665/* VARARGS */ 666static void 667ParseVErrorInternal(FILE *f, const char *cfname, size_t clineno, int type, 668 const char *fmt, va_list ap) 669{ 670 static Boolean fatal_warning_error_printed = FALSE; 671 672 (void)fprintf(f, "%s: ", progname); 673 674 if (cfname != NULL) { 675 (void)fprintf(f, "\""); 676 if (*cfname != '/' && strcmp(cfname, "(stdin)") != 0) { 677 char *cp; 678 const char *dir; 679 680 /* 681 * Nothing is more annoying than not knowing 682 * which Makefile is the culprit. 683 */ 684 dir = Var_Value(".PARSEDIR", VAR_GLOBAL, &cp); 685 if (dir == NULL || *dir == '\0' || 686 (*dir == '.' && dir[1] == '\0')) 687 dir = Var_Value(".CURDIR", VAR_GLOBAL, &cp); 688 if (dir == NULL) 689 dir = "."; 690 691 (void)fprintf(f, "%s/%s", dir, cfname); 692 } else 693 (void)fprintf(f, "%s", cfname); 694 695 (void)fprintf(f, "\" line %d: ", (int)clineno); 696 } 697 if (type == PARSE_WARNING) 698 (void)fprintf(f, "warning: "); 699 (void)vfprintf(f, fmt, ap); 700 (void)fprintf(f, "\n"); 701 (void)fflush(f); 702 if (type == PARSE_FATAL || parseWarnFatal) 703 fatals += 1; 704 if (parseWarnFatal && !fatal_warning_error_printed) { 705 Error("parsing warnings being treated as errors"); 706 fatal_warning_error_printed = TRUE; 707 } 708} 709 710/*- 711 * ParseErrorInternal -- 712 * Error function 713 * 714 * Results: 715 * None 716 * 717 * Side Effects: 718 * None 719 */ 720/* VARARGS */ 721static void 722ParseErrorInternal(const char *cfname, size_t clineno, int type, 723 const char *fmt, ...) 724{ 725 va_list ap; 726 727 va_start(ap, fmt); 728 (void)fflush(stdout); 729 ParseVErrorInternal(stderr, cfname, clineno, type, fmt, ap); 730 va_end(ap); 731 732 if (debug_file != stderr && debug_file != stdout) { 733 va_start(ap, fmt); 734 ParseVErrorInternal(debug_file, cfname, clineno, type, fmt, ap); 735 va_end(ap); 736 } 737} 738 739/*- 740 * Parse_Error -- 741 * External interface to ParseErrorInternal; uses the default filename 742 * Line number. 743 * 744 * Results: 745 * None 746 * 747 * Side Effects: 748 * None 749 */ 750/* VARARGS */ 751void 752Parse_Error(int type, const char *fmt, ...) 753{ 754 va_list ap; 755 const char *fname; 756 size_t lineno; 757 758 if (curFile == NULL) { 759 fname = NULL; 760 lineno = 0; 761 } else { 762 fname = curFile->fname; 763 lineno = curFile->lineno; 764 } 765 766 va_start(ap, fmt); 767 (void)fflush(stdout); 768 ParseVErrorInternal(stderr, fname, lineno, type, fmt, ap); 769 va_end(ap); 770 771 if (debug_file != stderr && debug_file != stdout) { 772 va_start(ap, fmt); 773 ParseVErrorInternal(debug_file, fname, lineno, type, fmt, ap); 774 va_end(ap); 775 } 776} 777 778 779/* 780 * ParseMessage 781 * Parse a .info .warning or .error directive 782 * 783 * The input is the line minus the ".". We substitute 784 * variables, print the message and exit(1) (for .error) or just print 785 * a warning if the directive is malformed. 786 */ 787static Boolean 788ParseMessage(char *line) 789{ 790 int mtype; 791 792 switch(*line) { 793 case 'i': 794 mtype = 0; 795 break; 796 case 'w': 797 mtype = PARSE_WARNING; 798 break; 799 case 'e': 800 mtype = PARSE_FATAL; 801 break; 802 default: 803 Parse_Error(PARSE_WARNING, "invalid syntax: \".%s\"", line); 804 return FALSE; 805 } 806 807 while (isalpha((u_char)*line)) 808 line++; 809 if (!isspace((u_char)*line)) 810 return FALSE; /* not for us */ 811 while (isspace((u_char)*line)) 812 line++; 813 814 line = Var_Subst(NULL, line, VAR_CMD, 0); 815 Parse_Error(mtype, "%s", line); 816 free(line); 817 818 if (mtype == PARSE_FATAL) { 819 /* Terminate immediately. */ 820 exit(1); 821 } 822 return TRUE; 823} 824 825/*- 826 *--------------------------------------------------------------------- 827 * ParseLinkSrc -- 828 * Link the parent node to its new child. Used in a Lst_ForEach by 829 * ParseDoDependency. If the specType isn't 'Not', the parent 830 * isn't linked as a parent of the child. 831 * 832 * Input: 833 * pgnp The parent node 834 * cgpn The child node 835 * 836 * Results: 837 * Always = 0 838 * 839 * Side Effects: 840 * New elements are added to the parents list of cgn and the 841 * children list of cgn. the unmade field of pgn is updated 842 * to reflect the additional child. 843 *--------------------------------------------------------------------- 844 */ 845static int 846ParseLinkSrc(void *pgnp, void *cgnp) 847{ 848 GNode *pgn = (GNode *)pgnp; 849 GNode *cgn = (GNode *)cgnp; 850 851 if ((pgn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (pgn->cohorts)) 852 pgn = (GNode *)Lst_Datum(Lst_Last(pgn->cohorts)); 853 (void)Lst_AtEnd(pgn->children, cgn); 854 if (specType == Not) 855 (void)Lst_AtEnd(cgn->parents, pgn); 856 pgn->unmade += 1; 857 if (DEBUG(PARSE)) { 858 fprintf(debug_file, "# ParseLinkSrc: added child %s - %s\n", pgn->name, cgn->name); 859 Targ_PrintNode(pgn, 0); 860 Targ_PrintNode(cgn, 0); 861 } 862 return (0); 863} 864 865/*- 866 *--------------------------------------------------------------------- 867 * ParseDoOp -- 868 * Apply the parsed operator to the given target node. Used in a 869 * Lst_ForEach call by ParseDoDependency once all targets have 870 * been found and their operator parsed. If the previous and new 871 * operators are incompatible, a major error is taken. 872 * 873 * Input: 874 * gnp The node to which the operator is to be applied 875 * opp The operator to apply 876 * 877 * Results: 878 * Always 0 879 * 880 * Side Effects: 881 * The type field of the node is altered to reflect any new bits in 882 * the op. 883 *--------------------------------------------------------------------- 884 */ 885static int 886ParseDoOp(void *gnp, void *opp) 887{ 888 GNode *gn = (GNode *)gnp; 889 int op = *(int *)opp; 890 /* 891 * If the dependency mask of the operator and the node don't match and 892 * the node has actually had an operator applied to it before, and 893 * the operator actually has some dependency information in it, complain. 894 */ 895 if (((op & OP_OPMASK) != (gn->type & OP_OPMASK)) && 896 !OP_NOP(gn->type) && !OP_NOP(op)) 897 { 898 Parse_Error(PARSE_FATAL, "Inconsistent operator for %s", gn->name); 899 return (1); 900 } 901 902 if ((op == OP_DOUBLEDEP) && ((gn->type & OP_OPMASK) == OP_DOUBLEDEP)) { 903 /* 904 * If the node was the object of a :: operator, we need to create a 905 * new instance of it for the children and commands on this dependency 906 * line. The new instance is placed on the 'cohorts' list of the 907 * initial one (note the initial one is not on its own cohorts list) 908 * and the new instance is linked to all parents of the initial 909 * instance. 910 */ 911 GNode *cohort; 912 913 /* 914 * Propagate copied bits to the initial node. They'll be propagated 915 * back to the rest of the cohorts later. 916 */ 917 gn->type |= op & ~OP_OPMASK; 918 919 cohort = Targ_FindNode(gn->name, TARG_NOHASH); 920 if (doing_depend) 921 ParseMark(cohort); 922 /* 923 * Make the cohort invisible as well to avoid duplicating it into 924 * other variables. True, parents of this target won't tend to do 925 * anything with their local variables, but better safe than 926 * sorry. (I think this is pointless now, since the relevant list 927 * traversals will no longer see this node anyway. -mycroft) 928 */ 929 cohort->type = op | OP_INVISIBLE; 930 (void)Lst_AtEnd(gn->cohorts, cohort); 931 cohort->centurion = gn; 932 gn->unmade_cohorts += 1; 933 snprintf(cohort->cohort_num, sizeof cohort->cohort_num, "#%d", 934 gn->unmade_cohorts); 935 } else { 936 /* 937 * We don't want to nuke any previous flags (whatever they were) so we 938 * just OR the new operator into the old 939 */ 940 gn->type |= op; 941 } 942 943 return (0); 944} 945 946/*- 947 *--------------------------------------------------------------------- 948 * ParseDoSrc -- 949 * Given the name of a source, figure out if it is an attribute 950 * and apply it to the targets if it is. Else decide if there is 951 * some attribute which should be applied *to* the source because 952 * of some special target and apply it if so. Otherwise, make the 953 * source be a child of the targets in the list 'targets' 954 * 955 * Input: 956 * tOp operator (if any) from special targets 957 * src name of the source to handle 958 * 959 * Results: 960 * None 961 * 962 * Side Effects: 963 * Operator bits may be added to the list of targets or to the source. 964 * The targets may have a new source added to their lists of children. 965 *--------------------------------------------------------------------- 966 */ 967static void 968ParseDoSrc(int tOp, const char *src) 969{ 970 GNode *gn = NULL; 971 static int wait_number = 0; 972 char wait_src[16]; 973 974 if (*src == '.' && isupper ((unsigned char)src[1])) { 975 int keywd = ParseFindKeyword(src); 976 if (keywd != -1) { 977 int op = parseKeywords[keywd].op; 978 if (op != 0) { 979 Lst_ForEach(targets, ParseDoOp, &op); 980 return; 981 } 982 if (parseKeywords[keywd].spec == Wait) { 983 /* 984 * We add a .WAIT node in the dependency list. 985 * After any dynamic dependencies (and filename globbing) 986 * have happened, it is given a dependency on the each 987 * previous child back to and previous .WAIT node. 988 * The next child won't be scheduled until the .WAIT node 989 * is built. 990 * We give each .WAIT node a unique name (mainly for diag). 991 */ 992 snprintf(wait_src, sizeof wait_src, ".WAIT_%u", ++wait_number); 993 gn = Targ_FindNode(wait_src, TARG_NOHASH); 994 if (doing_depend) 995 ParseMark(gn); 996 gn->type = OP_WAIT | OP_PHONY | OP_DEPENDS | OP_NOTMAIN; 997 Lst_ForEach(targets, ParseLinkSrc, gn); 998 return; 999 } 1000 } 1001 } 1002 1003 switch (specType) { 1004 case Main: 1005 /* 1006 * If we have noted the existence of a .MAIN, it means we need 1007 * to add the sources of said target to the list of things 1008 * to create. The string 'src' is likely to be free, so we 1009 * must make a new copy of it. Note that this will only be 1010 * invoked if the user didn't specify a target on the command 1011 * line. This is to allow #ifmake's to succeed, or something... 1012 */ 1013 (void)Lst_AtEnd(create, bmake_strdup(src)); 1014 /* 1015 * Add the name to the .TARGETS variable as well, so the user can 1016 * employ that, if desired. 1017 */ 1018 Var_Append(".TARGETS", src, VAR_GLOBAL); 1019 return; 1020 1021 case Order: 1022 /* 1023 * Create proper predecessor/successor links between the previous 1024 * source and the current one. 1025 */ 1026 gn = Targ_FindNode(src, TARG_CREATE); 1027 if (doing_depend) 1028 ParseMark(gn); 1029 if (predecessor != NULL) { 1030 (void)Lst_AtEnd(predecessor->order_succ, gn); 1031 (void)Lst_AtEnd(gn->order_pred, predecessor); 1032 if (DEBUG(PARSE)) { 1033 fprintf(debug_file, "# ParseDoSrc: added Order dependency %s - %s\n", 1034 predecessor->name, gn->name); 1035 Targ_PrintNode(predecessor, 0); 1036 Targ_PrintNode(gn, 0); 1037 } 1038 } 1039 /* 1040 * The current source now becomes the predecessor for the next one. 1041 */ 1042 predecessor = gn; 1043 break; 1044 1045 default: 1046 /* 1047 * If the source is not an attribute, we need to find/create 1048 * a node for it. After that we can apply any operator to it 1049 * from a special target or link it to its parents, as 1050 * appropriate. 1051 * 1052 * In the case of a source that was the object of a :: operator, 1053 * the attribute is applied to all of its instances (as kept in 1054 * the 'cohorts' list of the node) or all the cohorts are linked 1055 * to all the targets. 1056 */ 1057 1058 /* Find/create the 'src' node and attach to all targets */ 1059 gn = Targ_FindNode(src, TARG_CREATE); 1060 if (doing_depend) 1061 ParseMark(gn); 1062 if (tOp) { 1063 gn->type |= tOp; 1064 } else { 1065 Lst_ForEach(targets, ParseLinkSrc, gn); 1066 } 1067 break; 1068 } 1069} 1070 1071/*- 1072 *----------------------------------------------------------------------- 1073 * ParseFindMain -- 1074 * Find a real target in the list and set it to be the main one. 1075 * Called by ParseDoDependency when a main target hasn't been found 1076 * yet. 1077 * 1078 * Input: 1079 * gnp Node to examine 1080 * 1081 * Results: 1082 * 0 if main not found yet, 1 if it is. 1083 * 1084 * Side Effects: 1085 * mainNode is changed and Targ_SetMain is called. 1086 * 1087 *----------------------------------------------------------------------- 1088 */ 1089static int 1090ParseFindMain(void *gnp, void *dummy) 1091{ 1092 GNode *gn = (GNode *)gnp; 1093 if ((gn->type & OP_NOTARGET) == 0) { 1094 mainNode = gn; 1095 Targ_SetMain(gn); 1096 return (dummy ? 1 : 1); 1097 } else { 1098 return (dummy ? 0 : 0); 1099 } 1100} 1101 1102/*- 1103 *----------------------------------------------------------------------- 1104 * ParseAddDir -- 1105 * Front-end for Dir_AddDir to make sure Lst_ForEach keeps going 1106 * 1107 * Results: 1108 * === 0 1109 * 1110 * Side Effects: 1111 * See Dir_AddDir. 1112 * 1113 *----------------------------------------------------------------------- 1114 */ 1115static int 1116ParseAddDir(void *path, void *name) 1117{ 1118 (void)Dir_AddDir((Lst) path, (char *)name); 1119 return(0); 1120} 1121 1122/*- 1123 *----------------------------------------------------------------------- 1124 * ParseClearPath -- 1125 * Front-end for Dir_ClearPath to make sure Lst_ForEach keeps going 1126 * 1127 * Results: 1128 * === 0 1129 * 1130 * Side Effects: 1131 * See Dir_ClearPath 1132 * 1133 *----------------------------------------------------------------------- 1134 */ 1135static int 1136ParseClearPath(void *path, void *dummy) 1137{ 1138 Dir_ClearPath((Lst) path); 1139 return(dummy ? 0 : 0); 1140} 1141 1142/*- 1143 *--------------------------------------------------------------------- 1144 * ParseDoDependency -- 1145 * Parse the dependency line in line. 1146 * 1147 * Input: 1148 * line the line to parse 1149 * 1150 * Results: 1151 * None 1152 * 1153 * Side Effects: 1154 * The nodes of the sources are linked as children to the nodes of the 1155 * targets. Some nodes may be created. 1156 * 1157 * We parse a dependency line by first extracting words from the line and 1158 * finding nodes in the list of all targets with that name. This is done 1159 * until a character is encountered which is an operator character. Currently 1160 * these are only ! and :. At this point the operator is parsed and the 1161 * pointer into the line advanced until the first source is encountered. 1162 * The parsed operator is applied to each node in the 'targets' list, 1163 * which is where the nodes found for the targets are kept, by means of 1164 * the ParseDoOp function. 1165 * The sources are read in much the same way as the targets were except 1166 * that now they are expanded using the wildcarding scheme of the C-Shell 1167 * and all instances of the resulting words in the list of all targets 1168 * are found. Each of the resulting nodes is then linked to each of the 1169 * targets as one of its children. 1170 * Certain targets are handled specially. These are the ones detailed 1171 * by the specType variable. 1172 * The storing of transformation rules is also taken care of here. 1173 * A target is recognized as a transformation rule by calling 1174 * Suff_IsTransform. If it is a transformation rule, its node is gotten 1175 * from the suffix module via Suff_AddTransform rather than the standard 1176 * Targ_FindNode in the target module. 1177 *--------------------------------------------------------------------- 1178 */ 1179static void 1180ParseDoDependency(char *line) 1181{ 1182 char *cp; /* our current position */ 1183 GNode *gn = NULL; /* a general purpose temporary node */ 1184 int op; /* the operator on the line */ 1185 char savec; /* a place to save a character */ 1186 Lst paths; /* List of search paths to alter when parsing 1187 * a list of .PATH targets */ 1188 int tOp; /* operator from special target */ 1189 Lst sources; /* list of archive source names after 1190 * expansion */ 1191 Lst curTargs; /* list of target names to be found and added 1192 * to the targets list */ 1193 char *lstart = line; 1194 1195 if (DEBUG(PARSE)) 1196 fprintf(debug_file, "ParseDoDependency(%s)\n", line); 1197 tOp = 0; 1198 1199 specType = Not; 1200 paths = NULL; 1201 1202 curTargs = Lst_Init(FALSE); 1203 1204 do { 1205 for (cp = line; *cp && (ParseIsEscaped(lstart, cp) || 1206 !(isspace((unsigned char)*cp) || 1207 *cp == '!' || *cp == ':' || *cp == LPAREN)); 1208 cp++) { 1209 if (*cp == '$') { 1210 /* 1211 * Must be a dynamic source (would have been expanded 1212 * otherwise), so call the Var module to parse the puppy 1213 * so we can safely advance beyond it...There should be 1214 * no errors in this, as they would have been discovered 1215 * in the initial Var_Subst and we wouldn't be here. 1216 */ 1217 int length; 1218 void *freeIt; 1219 char *result; 1220 1221 result = Var_Parse(cp, VAR_CMD, TRUE, &length, &freeIt); 1222 if (freeIt) 1223 free(freeIt); 1224 cp += length-1; 1225 } 1226 } 1227 1228 if (!ParseIsEscaped(lstart, cp) && *cp == LPAREN) { 1229 /* 1230 * Archives must be handled specially to make sure the OP_ARCHV 1231 * flag is set in their 'type' field, for one thing, and because 1232 * things like "archive(file1.o file2.o file3.o)" are permissible. 1233 * Arch_ParseArchive will set 'line' to be the first non-blank 1234 * after the archive-spec. It creates/finds nodes for the members 1235 * and places them on the given list, returning SUCCESS if all 1236 * went well and FAILURE if there was an error in the 1237 * specification. On error, line should remain untouched. 1238 */ 1239 if (Arch_ParseArchive(&line, targets, VAR_CMD) != SUCCESS) { 1240 Parse_Error(PARSE_FATAL, 1241 "Error in archive specification: \"%s\"", line); 1242 goto out; 1243 } else { 1244 continue; 1245 } 1246 } 1247 savec = *cp; 1248 1249 if (!*cp) { 1250 /* 1251 * Ending a dependency line without an operator is a Bozo 1252 * no-no. As a heuristic, this is also often triggered by 1253 * undetected conflicts from cvs/rcs merges. 1254 */ 1255 if ((strncmp(line, "<<<<<<", 6) == 0) || 1256 (strncmp(line, "======", 6) == 0) || 1257 (strncmp(line, ">>>>>>", 6) == 0)) 1258 Parse_Error(PARSE_FATAL, 1259 "Makefile appears to contain unresolved cvs/rcs/??? merge conflicts"); 1260 else 1261 Parse_Error(PARSE_FATAL, lstart[0] == '.' ? "Unknown directive" 1262 : "Need an operator"); 1263 goto out; 1264 } 1265 *cp = '\0'; 1266 1267 /* 1268 * Have a word in line. See if it's a special target and set 1269 * specType to match it. 1270 */ 1271 if (*line == '.' && isupper ((unsigned char)line[1])) { 1272 /* 1273 * See if the target is a special target that must have it 1274 * or its sources handled specially. 1275 */ 1276 int keywd = ParseFindKeyword(line); 1277 if (keywd != -1) { 1278 if (specType == ExPath && parseKeywords[keywd].spec != ExPath) { 1279 Parse_Error(PARSE_FATAL, "Mismatched special targets"); 1280 goto out; 1281 } 1282 1283 specType = parseKeywords[keywd].spec; 1284 tOp = parseKeywords[keywd].op; 1285 1286 /* 1287 * Certain special targets have special semantics: 1288 * .PATH Have to set the dirSearchPath 1289 * variable too 1290 * .MAIN Its sources are only used if 1291 * nothing has been specified to 1292 * create. 1293 * .DEFAULT Need to create a node to hang 1294 * commands on, but we don't want 1295 * it in the graph, nor do we want 1296 * it to be the Main Target, so we 1297 * create it, set OP_NOTMAIN and 1298 * add it to the list, setting 1299 * DEFAULT to the new node for 1300 * later use. We claim the node is 1301 * A transformation rule to make 1302 * life easier later, when we'll 1303 * use Make_HandleUse to actually 1304 * apply the .DEFAULT commands. 1305 * .PHONY The list of targets 1306 * .NOPATH Don't search for file in the path 1307 * .STALE 1308 * .BEGIN 1309 * .END 1310 * .ERROR 1311 * .INTERRUPT Are not to be considered the 1312 * main target. 1313 * .NOTPARALLEL Make only one target at a time. 1314 * .SINGLESHELL Create a shell for each command. 1315 * .ORDER Must set initial predecessor to NULL 1316 */ 1317 switch (specType) { 1318 case ExPath: 1319 if (paths == NULL) { 1320 paths = Lst_Init(FALSE); 1321 } 1322 (void)Lst_AtEnd(paths, dirSearchPath); 1323 break; 1324 case Main: 1325 if (!Lst_IsEmpty(create)) { 1326 specType = Not; 1327 } 1328 break; 1329 case Begin: 1330 case End: 1331 case Stale: 1332 case dotError: 1333 case Interrupt: 1334 gn = Targ_FindNode(line, TARG_CREATE); 1335 if (doing_depend) 1336 ParseMark(gn); 1337 gn->type |= OP_NOTMAIN|OP_SPECIAL; 1338 (void)Lst_AtEnd(targets, gn); 1339 break; 1340 case Default: 1341 gn = Targ_NewGN(".DEFAULT"); 1342 gn->type |= (OP_NOTMAIN|OP_TRANSFORM); 1343 (void)Lst_AtEnd(targets, gn); 1344 DEFAULT = gn; 1345 break; 1346 case NotParallel: 1347 maxJobs = 1; 1348 break; 1349 case SingleShell: 1350 compatMake = TRUE; 1351 break; 1352 case Order: 1353 predecessor = NULL; 1354 break; 1355 default: 1356 break; 1357 } 1358 } else if (strncmp(line, ".PATH", 5) == 0) { 1359 /* 1360 * .PATH<suffix> has to be handled specially. 1361 * Call on the suffix module to give us a path to 1362 * modify. 1363 */ 1364 Lst path; 1365 1366 specType = ExPath; 1367 path = Suff_GetPath(&line[5]); 1368 if (path == NULL) { 1369 Parse_Error(PARSE_FATAL, 1370 "Suffix '%s' not defined (yet)", 1371 &line[5]); 1372 goto out; 1373 } else { 1374 if (paths == NULL) { 1375 paths = Lst_Init(FALSE); 1376 } 1377 (void)Lst_AtEnd(paths, path); 1378 } 1379 } 1380 } 1381 1382 /* 1383 * Have word in line. Get or create its node and stick it at 1384 * the end of the targets list 1385 */ 1386 if ((specType == Not) && (*line != '\0')) { 1387 if (Dir_HasWildcards(line)) { 1388 /* 1389 * Targets are to be sought only in the current directory, 1390 * so create an empty path for the thing. Note we need to 1391 * use Dir_Destroy in the destruction of the path as the 1392 * Dir module could have added a directory to the path... 1393 */ 1394 Lst emptyPath = Lst_Init(FALSE); 1395 1396 Dir_Expand(line, emptyPath, curTargs); 1397 1398 Lst_Destroy(emptyPath, Dir_Destroy); 1399 } else { 1400 /* 1401 * No wildcards, but we want to avoid code duplication, 1402 * so create a list with the word on it. 1403 */ 1404 (void)Lst_AtEnd(curTargs, line); 1405 } 1406 1407 while(!Lst_IsEmpty(curTargs)) { 1408 char *targName = (char *)Lst_DeQueue(curTargs); 1409 1410 if (!Suff_IsTransform (targName)) { 1411 gn = Targ_FindNode(targName, TARG_CREATE); 1412 } else { 1413 gn = Suff_AddTransform(targName); 1414 } 1415 if (doing_depend) 1416 ParseMark(gn); 1417 1418 (void)Lst_AtEnd(targets, gn); 1419 } 1420 } else if (specType == ExPath && *line != '.' && *line != '\0') { 1421 Parse_Error(PARSE_WARNING, "Extra target (%s) ignored", line); 1422 } 1423 1424 *cp = savec; 1425 /* 1426 * If it is a special type and not .PATH, it's the only target we 1427 * allow on this line... 1428 */ 1429 if (specType != Not && specType != ExPath) { 1430 Boolean warning = FALSE; 1431 1432 while (*cp && (ParseIsEscaped(lstart, cp) || 1433 ((*cp != '!') && (*cp != ':')))) { 1434 if (ParseIsEscaped(lstart, cp) || 1435 (*cp != ' ' && *cp != '\t')) { 1436 warning = TRUE; 1437 } 1438 cp++; 1439 } 1440 if (warning) { 1441 Parse_Error(PARSE_WARNING, "Extra target ignored"); 1442 } 1443 } else { 1444 while (*cp && isspace ((unsigned char)*cp)) { 1445 cp++; 1446 } 1447 } 1448 line = cp; 1449 } while (*line && (ParseIsEscaped(lstart, line) || 1450 ((*line != '!') && (*line != ':')))); 1451 1452 /* 1453 * Don't need the list of target names anymore... 1454 */ 1455 Lst_Destroy(curTargs, NULL); 1456 curTargs = NULL; 1457 1458 if (!Lst_IsEmpty(targets)) { 1459 switch(specType) { 1460 default: 1461 Parse_Error(PARSE_WARNING, "Special and mundane targets don't mix. Mundane ones ignored"); 1462 break; 1463 case Default: 1464 case Stale: 1465 case Begin: 1466 case End: 1467 case dotError: 1468 case Interrupt: 1469 /* 1470 * These four create nodes on which to hang commands, so 1471 * targets shouldn't be empty... 1472 */ 1473 case Not: 1474 /* 1475 * Nothing special here -- targets can be empty if it wants. 1476 */ 1477 break; 1478 } 1479 } 1480 1481 /* 1482 * Have now parsed all the target names. Must parse the operator next. The 1483 * result is left in op . 1484 */ 1485 if (*cp == '!') { 1486 op = OP_FORCE; 1487 } else if (*cp == ':') { 1488 if (cp[1] == ':') { 1489 op = OP_DOUBLEDEP; 1490 cp++; 1491 } else { 1492 op = OP_DEPENDS; 1493 } 1494 } else { 1495 Parse_Error(PARSE_FATAL, lstart[0] == '.' ? "Unknown directive" 1496 : "Missing dependency operator"); 1497 goto out; 1498 } 1499 1500 cp++; /* Advance beyond operator */ 1501 1502 Lst_ForEach(targets, ParseDoOp, &op); 1503 1504 /* 1505 * Get to the first source 1506 */ 1507 while (*cp && isspace ((unsigned char)*cp)) { 1508 cp++; 1509 } 1510 line = cp; 1511 1512 /* 1513 * Several special targets take different actions if present with no 1514 * sources: 1515 * a .SUFFIXES line with no sources clears out all old suffixes 1516 * a .PRECIOUS line makes all targets precious 1517 * a .IGNORE line ignores errors for all targets 1518 * a .SILENT line creates silence when making all targets 1519 * a .PATH removes all directories from the search path(s). 1520 */ 1521 if (!*line) { 1522 switch (specType) { 1523 case Suffixes: 1524 Suff_ClearSuffixes(); 1525 break; 1526 case Precious: 1527 allPrecious = TRUE; 1528 break; 1529 case Ignore: 1530 ignoreErrors = TRUE; 1531 break; 1532 case Silent: 1533 beSilent = TRUE; 1534 break; 1535 case ExPath: 1536 Lst_ForEach(paths, ParseClearPath, NULL); 1537 Dir_SetPATH(); 1538 break; 1539#ifdef POSIX 1540 case Posix: 1541 Var_Set("%POSIX", "1003.2", VAR_GLOBAL, 0); 1542 break; 1543#endif 1544 default: 1545 break; 1546 } 1547 } else if (specType == MFlags) { 1548 /* 1549 * Call on functions in main.c to deal with these arguments and 1550 * set the initial character to a null-character so the loop to 1551 * get sources won't get anything 1552 */ 1553 Main_ParseArgLine(line); 1554 *line = '\0'; 1555 } else if (specType == ExShell) { 1556 if (Job_ParseShell(line) != SUCCESS) { 1557 Parse_Error(PARSE_FATAL, "improper shell specification"); 1558 goto out; 1559 } 1560 *line = '\0'; 1561 } else if ((specType == NotParallel) || (specType == SingleShell)) { 1562 *line = '\0'; 1563 } 1564 1565 /* 1566 * NOW GO FOR THE SOURCES 1567 */ 1568 if ((specType == Suffixes) || (specType == ExPath) || 1569 (specType == Includes) || (specType == Libs) || 1570 (specType == Null) || (specType == ExObjdir)) 1571 { 1572 while (*line) { 1573 /* 1574 * If the target was one that doesn't take files as its sources 1575 * but takes something like suffixes, we take each 1576 * space-separated word on the line as a something and deal 1577 * with it accordingly. 1578 * 1579 * If the target was .SUFFIXES, we take each source as a 1580 * suffix and add it to the list of suffixes maintained by the 1581 * Suff module. 1582 * 1583 * If the target was a .PATH, we add the source as a directory 1584 * to search on the search path. 1585 * 1586 * If it was .INCLUDES, the source is taken to be the suffix of 1587 * files which will be #included and whose search path should 1588 * be present in the .INCLUDES variable. 1589 * 1590 * If it was .LIBS, the source is taken to be the suffix of 1591 * files which are considered libraries and whose search path 1592 * should be present in the .LIBS variable. 1593 * 1594 * If it was .NULL, the source is the suffix to use when a file 1595 * has no valid suffix. 1596 * 1597 * If it was .OBJDIR, the source is a new definition for .OBJDIR, 1598 * and will cause make to do a new chdir to that path. 1599 */ 1600 while (*cp && !isspace ((unsigned char)*cp)) { 1601 cp++; 1602 } 1603 savec = *cp; 1604 *cp = '\0'; 1605 switch (specType) { 1606 case Suffixes: 1607 Suff_AddSuffix(line, &mainNode); 1608 break; 1609 case ExPath: 1610 Lst_ForEach(paths, ParseAddDir, line); 1611 break; 1612 case Includes: 1613 Suff_AddInclude(line); 1614 break; 1615 case Libs: 1616 Suff_AddLib(line); 1617 break; 1618 case Null: 1619 Suff_SetNull(line); 1620 break; 1621 case ExObjdir: 1622 Main_SetObjdir(line); 1623 break; 1624 default: 1625 break; 1626 } 1627 *cp = savec; 1628 if (savec != '\0') { 1629 cp++; 1630 } 1631 while (*cp && isspace ((unsigned char)*cp)) { 1632 cp++; 1633 } 1634 line = cp; 1635 } 1636 if (paths) { 1637 Lst_Destroy(paths, NULL); 1638 } 1639 if (specType == ExPath) 1640 Dir_SetPATH(); 1641 } else { 1642 while (*line) { 1643 /* 1644 * The targets take real sources, so we must beware of archive 1645 * specifications (i.e. things with left parentheses in them) 1646 * and handle them accordingly. 1647 */ 1648 for (; *cp && !isspace ((unsigned char)*cp); cp++) { 1649 if ((*cp == LPAREN) && (cp > line) && (cp[-1] != '$')) { 1650 /* 1651 * Only stop for a left parenthesis if it isn't at the 1652 * start of a word (that'll be for variable changes 1653 * later) and isn't preceded by a dollar sign (a dynamic 1654 * source). 1655 */ 1656 break; 1657 } 1658 } 1659 1660 if (*cp == LPAREN) { 1661 sources = Lst_Init(FALSE); 1662 if (Arch_ParseArchive(&line, sources, VAR_CMD) != SUCCESS) { 1663 Parse_Error(PARSE_FATAL, 1664 "Error in source archive spec \"%s\"", line); 1665 goto out; 1666 } 1667 1668 while (!Lst_IsEmpty (sources)) { 1669 gn = (GNode *)Lst_DeQueue(sources); 1670 ParseDoSrc(tOp, gn->name); 1671 } 1672 Lst_Destroy(sources, NULL); 1673 cp = line; 1674 } else { 1675 if (*cp) { 1676 *cp = '\0'; 1677 cp += 1; 1678 } 1679 1680 ParseDoSrc(tOp, line); 1681 } 1682 while (*cp && isspace ((unsigned char)*cp)) { 1683 cp++; 1684 } 1685 line = cp; 1686 } 1687 } 1688 1689 if (mainNode == NULL) { 1690 /* 1691 * If we have yet to decide on a main target to make, in the 1692 * absence of any user input, we want the first target on 1693 * the first dependency line that is actually a real target 1694 * (i.e. isn't a .USE or .EXEC rule) to be made. 1695 */ 1696 Lst_ForEach(targets, ParseFindMain, NULL); 1697 } 1698 1699out: 1700 if (curTargs) 1701 Lst_Destroy(curTargs, NULL); 1702} 1703 1704/*- 1705 *--------------------------------------------------------------------- 1706 * Parse_IsVar -- 1707 * Return TRUE if the passed line is a variable assignment. A variable 1708 * assignment consists of a single word followed by optional whitespace 1709 * followed by either a += or an = operator. 1710 * This function is used both by the Parse_File function and main when 1711 * parsing the command-line arguments. 1712 * 1713 * Input: 1714 * line the line to check 1715 * 1716 * Results: 1717 * TRUE if it is. FALSE if it ain't 1718 * 1719 * Side Effects: 1720 * none 1721 *--------------------------------------------------------------------- 1722 */ 1723Boolean 1724Parse_IsVar(char *line) 1725{ 1726 Boolean wasSpace = FALSE; /* set TRUE if found a space */ 1727 char ch; 1728 int level = 0; 1729#define ISEQOPERATOR(c) \ 1730 (((c) == '+') || ((c) == ':') || ((c) == '?') || ((c) == '!')) 1731 1732 /* 1733 * Skip to variable name 1734 */ 1735 for (;(*line == ' ') || (*line == '\t'); line++) 1736 continue; 1737 1738 /* Scan for one of the assignment operators outside a variable expansion */ 1739 while ((ch = *line++) != 0) { 1740 if (ch == '(' || ch == '{') { 1741 level++; 1742 continue; 1743 } 1744 if (ch == ')' || ch == '}') { 1745 level--; 1746 continue; 1747 } 1748 if (level != 0) 1749 continue; 1750 while (ch == ' ' || ch == '\t') { 1751 ch = *line++; 1752 wasSpace = TRUE; 1753 } 1754#ifdef SUNSHCMD 1755 if (ch == ':' && strncmp(line, "sh", 2) == 0) { 1756 line += 2; 1757 continue; 1758 } 1759#endif 1760 if (ch == '=') 1761 return TRUE; 1762 if (*line == '=' && ISEQOPERATOR(ch)) 1763 return TRUE; 1764 if (wasSpace) 1765 return FALSE; 1766 } 1767 1768 return FALSE; 1769} 1770 1771/*- 1772 *--------------------------------------------------------------------- 1773 * Parse_DoVar -- 1774 * Take the variable assignment in the passed line and do it in the 1775 * global context. 1776 * 1777 * Note: There is a lexical ambiguity with assignment modifier characters 1778 * in variable names. This routine interprets the character before the = 1779 * as a modifier. Therefore, an assignment like 1780 * C++=/usr/bin/CC 1781 * is interpreted as "C+ +=" instead of "C++ =". 1782 * 1783 * Input: 1784 * line a line guaranteed to be a variable assignment. 1785 * This reduces error checks 1786 * ctxt Context in which to do the assignment 1787 * 1788 * Results: 1789 * none 1790 * 1791 * Side Effects: 1792 * the variable structure of the given variable name is altered in the 1793 * global context. 1794 *--------------------------------------------------------------------- 1795 */ 1796void 1797Parse_DoVar(char *line, GNode *ctxt) 1798{ 1799 char *cp; /* pointer into line */ 1800 enum { 1801 VAR_SUBST, VAR_APPEND, VAR_SHELL, VAR_NORMAL 1802 } type; /* Type of assignment */ 1803 char *opc; /* ptr to operator character to 1804 * null-terminate the variable name */ 1805 Boolean freeCp = FALSE; /* TRUE if cp needs to be freed, 1806 * i.e. if any variable expansion was 1807 * performed */ 1808 int depth; 1809 1810 /* 1811 * Skip to variable name 1812 */ 1813 while ((*line == ' ') || (*line == '\t')) { 1814 line++; 1815 } 1816 1817 /* 1818 * Skip to operator character, nulling out whitespace as we go 1819 * XXX Rather than counting () and {} we should look for $ and 1820 * then expand the variable. 1821 */ 1822 for (depth = 0, cp = line + 1; depth != 0 || *cp != '='; cp++) { 1823 if (*cp == '(' || *cp == '{') { 1824 depth++; 1825 continue; 1826 } 1827 if (*cp == ')' || *cp == '}') { 1828 depth--; 1829 continue; 1830 } 1831 if (depth == 0 && isspace ((unsigned char)*cp)) { 1832 *cp = '\0'; 1833 } 1834 } 1835 opc = cp-1; /* operator is the previous character */ 1836 *cp++ = '\0'; /* nuke the = */ 1837 1838 /* 1839 * Check operator type 1840 */ 1841 switch (*opc) { 1842 case '+': 1843 type = VAR_APPEND; 1844 *opc = '\0'; 1845 break; 1846 1847 case '?': 1848 /* 1849 * If the variable already has a value, we don't do anything. 1850 */ 1851 *opc = '\0'; 1852 if (Var_Exists(line, ctxt)) { 1853 return; 1854 } else { 1855 type = VAR_NORMAL; 1856 } 1857 break; 1858 1859 case ':': 1860 type = VAR_SUBST; 1861 *opc = '\0'; 1862 break; 1863 1864 case '!': 1865 type = VAR_SHELL; 1866 *opc = '\0'; 1867 break; 1868 1869 default: 1870#ifdef SUNSHCMD 1871 while (opc > line && *opc != ':') 1872 opc--; 1873 1874 if (strncmp(opc, ":sh", 3) == 0) { 1875 type = VAR_SHELL; 1876 *opc = '\0'; 1877 break; 1878 } 1879#endif 1880 type = VAR_NORMAL; 1881 break; 1882 } 1883 1884 while (isspace ((unsigned char)*cp)) { 1885 cp++; 1886 } 1887 1888 if (type == VAR_APPEND) { 1889 Var_Append(line, cp, ctxt); 1890 } else if (type == VAR_SUBST) { 1891 /* 1892 * Allow variables in the old value to be undefined, but leave their 1893 * invocation alone -- this is done by forcing oldVars to be false. 1894 * XXX: This can cause recursive variables, but that's not hard to do, 1895 * and this allows someone to do something like 1896 * 1897 * CFLAGS = $(.INCLUDES) 1898 * CFLAGS := -I.. $(CFLAGS) 1899 * 1900 * And not get an error. 1901 */ 1902 Boolean oldOldVars = oldVars; 1903 1904 oldVars = FALSE; 1905 1906 /* 1907 * make sure that we set the variable the first time to nothing 1908 * so that it gets substituted! 1909 */ 1910 if (!Var_Exists(line, ctxt)) 1911 Var_Set(line, "", ctxt, 0); 1912 1913 cp = Var_Subst(NULL, cp, ctxt, FALSE); 1914 oldVars = oldOldVars; 1915 freeCp = TRUE; 1916 1917 Var_Set(line, cp, ctxt, 0); 1918 } else if (type == VAR_SHELL) { 1919 char *res; 1920 const char *error; 1921 1922 if (strchr(cp, '$') != NULL) { 1923 /* 1924 * There's a dollar sign in the command, so perform variable 1925 * expansion on the whole thing. The resulting string will need 1926 * freeing when we're done, so set freeCmd to TRUE. 1927 */ 1928 cp = Var_Subst(NULL, cp, VAR_CMD, TRUE); 1929 freeCp = TRUE; 1930 } 1931 1932 res = Cmd_Exec(cp, &error); 1933 Var_Set(line, res, ctxt, 0); 1934 free(res); 1935 1936 if (error) 1937 Parse_Error(PARSE_WARNING, error, cp); 1938 } else { 1939 /* 1940 * Normal assignment -- just do it. 1941 */ 1942 Var_Set(line, cp, ctxt, 0); 1943 } 1944 if (strcmp(line, MAKEOVERRIDES) == 0) 1945 Main_ExportMAKEFLAGS(FALSE); /* re-export MAKEFLAGS */ 1946 else if (strcmp(line, ".CURDIR") == 0) { 1947 /* 1948 * Somone is being (too?) clever... 1949 * Let's pretend they know what they are doing and 1950 * re-initialize the 'cur' Path. 1951 */ 1952 Dir_InitCur(cp); 1953 Dir_SetPATH(); 1954 } else if (strcmp(line, MAKE_JOB_PREFIX) == 0) { 1955 Job_SetPrefix(); 1956 } else if (strcmp(line, MAKE_EXPORTED) == 0) { 1957 Var_Export(cp, 0); 1958 } 1959 if (freeCp) 1960 free(cp); 1961} 1962 1963 1964/*- 1965 * ParseAddCmd -- 1966 * Lst_ForEach function to add a command line to all targets 1967 * 1968 * Input: 1969 * gnp the node to which the command is to be added 1970 * cmd the command to add 1971 * 1972 * Results: 1973 * Always 0 1974 * 1975 * Side Effects: 1976 * A new element is added to the commands list of the node. 1977 */ 1978static int 1979ParseAddCmd(void *gnp, void *cmd) 1980{ 1981 GNode *gn = (GNode *)gnp; 1982 1983 /* Add to last (ie current) cohort for :: targets */ 1984 if ((gn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (gn->cohorts)) 1985 gn = (GNode *)Lst_Datum(Lst_Last(gn->cohorts)); 1986 1987 /* if target already supplied, ignore commands */ 1988 if (!(gn->type & OP_HAS_COMMANDS)) { 1989 (void)Lst_AtEnd(gn->commands, cmd); 1990 ParseMark(gn); 1991 } else { 1992#ifdef notyet 1993 /* XXX: We cannot do this until we fix the tree */ 1994 (void)Lst_AtEnd(gn->commands, cmd); 1995 Parse_Error(PARSE_WARNING, 1996 "overriding commands for target \"%s\"; " 1997 "previous commands defined at %s: %d ignored", 1998 gn->name, gn->fname, gn->lineno); 1999#else 2000 Parse_Error(PARSE_WARNING, 2001 "duplicate script for target \"%s\" ignored", 2002 gn->name); 2003 ParseErrorInternal(gn->fname, gn->lineno, PARSE_WARNING, 2004 "using previous script for \"%s\" defined here", 2005 gn->name); 2006#endif 2007 } 2008 return(0); 2009} 2010 2011/*- 2012 *----------------------------------------------------------------------- 2013 * ParseHasCommands -- 2014 * Callback procedure for Parse_File when destroying the list of 2015 * targets on the last dependency line. Marks a target as already 2016 * having commands if it does, to keep from having shell commands 2017 * on multiple dependency lines. 2018 * 2019 * Input: 2020 * gnp Node to examine 2021 * 2022 * Results: 2023 * None 2024 * 2025 * Side Effects: 2026 * OP_HAS_COMMANDS may be set for the target. 2027 * 2028 *----------------------------------------------------------------------- 2029 */ 2030static void 2031ParseHasCommands(void *gnp) 2032{ 2033 GNode *gn = (GNode *)gnp; 2034 if (!Lst_IsEmpty(gn->commands)) { 2035 gn->type |= OP_HAS_COMMANDS; 2036 } 2037} 2038 2039/*- 2040 *----------------------------------------------------------------------- 2041 * Parse_AddIncludeDir -- 2042 * Add a directory to the path searched for included makefiles 2043 * bracketed by double-quotes. Used by functions in main.c 2044 * 2045 * Input: 2046 * dir The name of the directory to add 2047 * 2048 * Results: 2049 * None. 2050 * 2051 * Side Effects: 2052 * The directory is appended to the list. 2053 * 2054 *----------------------------------------------------------------------- 2055 */ 2056void 2057Parse_AddIncludeDir(char *dir) 2058{ 2059 (void)Dir_AddDir(parseIncPath, dir); 2060} 2061 2062/*- 2063 *--------------------------------------------------------------------- 2064 * ParseDoInclude -- 2065 * Push to another file. 2066 * 2067 * The input is the line minus the `.'. A file spec is a string 2068 * enclosed in <> or "". The former is looked for only in sysIncPath. 2069 * The latter in . and the directories specified by -I command line 2070 * options 2071 * 2072 * Results: 2073 * None 2074 * 2075 * Side Effects: 2076 * A structure is added to the includes Lst and readProc, lineno, 2077 * fname and curFILE are altered for the new file 2078 *--------------------------------------------------------------------- 2079 */ 2080 2081static void 2082Parse_include_file(char *file, Boolean isSystem, int silent) 2083{ 2084 struct loadedfile *lf; 2085 char *fullname; /* full pathname of file */ 2086 char *newName; 2087 char *prefEnd, *incdir; 2088 int fd; 2089 int i; 2090 2091 /* 2092 * Now we know the file's name and its search path, we attempt to 2093 * find the durn thing. A return of NULL indicates the file don't 2094 * exist. 2095 */ 2096 fullname = file[0] == '/' ? bmake_strdup(file) : NULL; 2097 2098 if (fullname == NULL && !isSystem) { 2099 /* 2100 * Include files contained in double-quotes are first searched for 2101 * relative to the including file's location. We don't want to 2102 * cd there, of course, so we just tack on the old file's 2103 * leading path components and call Dir_FindFile to see if 2104 * we can locate the beast. 2105 */ 2106 2107 incdir = bmake_strdup(curFile->fname); 2108 prefEnd = strrchr(incdir, '/'); 2109 if (prefEnd != NULL) { 2110 *prefEnd = '\0'; 2111 /* Now do lexical processing of leading "../" on the filename */ 2112 for (i = 0; strncmp(file + i, "../", 3) == 0; i += 3) { 2113 prefEnd = strrchr(incdir + 1, '/'); 2114 if (prefEnd == NULL || strcmp(prefEnd, "/..") == 0) 2115 break; 2116 *prefEnd = '\0'; 2117 } 2118 newName = str_concat(incdir, file + i, STR_ADDSLASH); 2119 fullname = Dir_FindFile(newName, parseIncPath); 2120 if (fullname == NULL) 2121 fullname = Dir_FindFile(newName, dirSearchPath); 2122 free(newName); 2123 } 2124 free(incdir); 2125 2126 if (fullname == NULL) { 2127 /* 2128 * Makefile wasn't found in same directory as included makefile. 2129 * Search for it first on the -I search path, 2130 * then on the .PATH search path, if not found in a -I directory. 2131 * If we have a suffix specific path we should use that. 2132 */ 2133 char *suff; 2134 Lst suffPath = NULL; 2135 2136 if ((suff = strrchr(file, '.'))) { 2137 suffPath = Suff_GetPath(suff); 2138 if (suffPath != NULL) { 2139 fullname = Dir_FindFile(file, suffPath); 2140 } 2141 } 2142 if (fullname == NULL) { 2143 fullname = Dir_FindFile(file, parseIncPath); 2144 if (fullname == NULL) { 2145 fullname = Dir_FindFile(file, dirSearchPath); 2146 } 2147 } 2148 } 2149 } 2150 2151 /* Looking for a system file or file still not found */ 2152 if (fullname == NULL) { 2153 /* 2154 * Look for it on the system path 2155 */ 2156 fullname = Dir_FindFile(file, 2157 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath); 2158 } 2159 2160 if (fullname == NULL) { 2161 if (!silent) 2162 Parse_Error(PARSE_FATAL, "Could not find %s", file); 2163 return; 2164 } 2165 2166 /* Actually open the file... */ 2167 fd = open(fullname, O_RDONLY); 2168 if (fd == -1) { 2169 if (!silent) 2170 Parse_Error(PARSE_FATAL, "Cannot open %s", fullname); 2171 free(fullname); 2172 return; 2173 } 2174 2175 /* load it */ 2176 lf = loadfile(fullname, fd); 2177 2178 /* Start reading from this file next */ 2179 Parse_SetInput(fullname, 0, -1, loadedfile_nextbuf, lf); 2180 curFile->lf = lf; 2181} 2182 2183static void 2184ParseDoInclude(char *line) 2185{ 2186 char endc; /* the character which ends the file spec */ 2187 char *cp; /* current position in file spec */ 2188 int silent = (*line != 'i') ? 1 : 0; 2189 char *file = &line[7 + silent]; 2190 2191 /* Skip to delimiter character so we know where to look */ 2192 while (*file == ' ' || *file == '\t') 2193 file++; 2194 2195 if (*file != '"' && *file != '<') { 2196 Parse_Error(PARSE_FATAL, 2197 ".include filename must be delimited by '\"' or '<'"); 2198 return; 2199 } 2200 2201 /* 2202 * Set the search path on which to find the include file based on the 2203 * characters which bracket its name. Angle-brackets imply it's 2204 * a system Makefile while double-quotes imply it's a user makefile 2205 */ 2206 if (*file == '<') { 2207 endc = '>'; 2208 } else { 2209 endc = '"'; 2210 } 2211 2212 /* Skip to matching delimiter */ 2213 for (cp = ++file; *cp && *cp != endc; cp++) 2214 continue; 2215 2216 if (*cp != endc) { 2217 Parse_Error(PARSE_FATAL, 2218 "Unclosed %cinclude filename. '%c' expected", 2219 '.', endc); 2220 return; 2221 } 2222 *cp = '\0'; 2223 2224 /* 2225 * Substitute for any variables in the file name before trying to 2226 * find the thing. 2227 */ 2228 file = Var_Subst(NULL, file, VAR_CMD, FALSE); 2229 2230 Parse_include_file(file, endc == '>', silent); 2231 free(file); 2232} 2233 2234 2235/*- 2236 *--------------------------------------------------------------------- 2237 * ParseSetParseFile -- 2238 * Set the .PARSEDIR and .PARSEFILE variables to the dirname and 2239 * basename of the given filename 2240 * 2241 * Results: 2242 * None 2243 * 2244 * Side Effects: 2245 * The .PARSEDIR and .PARSEFILE variables are overwritten by the 2246 * dirname and basename of the given filename. 2247 *--------------------------------------------------------------------- 2248 */ 2249static void 2250ParseSetParseFile(const char *filename) 2251{ 2252 char *slash, *dirname; 2253 const char *pd, *pf; 2254 int len; 2255 2256 slash = strrchr(filename, '/'); 2257 if (slash == NULL) { 2258 Var_Set(".PARSEDIR", pd = curdir, VAR_GLOBAL, 0); 2259 Var_Set(".PARSEFILE", pf = filename, VAR_GLOBAL, 0); 2260 dirname= NULL; 2261 } else { 2262 len = slash - filename; 2263 dirname = bmake_malloc(len + 1); 2264 memcpy(dirname, filename, len); 2265 dirname[len] = '\0'; 2266 Var_Set(".PARSEDIR", pd = dirname, VAR_GLOBAL, 0); 2267 Var_Set(".PARSEFILE", pf = slash + 1, VAR_GLOBAL, 0); 2268 } 2269 if (DEBUG(PARSE)) 2270 fprintf(debug_file, "ParseSetParseFile: ${.PARSEDIR} = `%s' " 2271 "${.PARSEFILE} = `%s'\n", pd, pf); 2272 free(dirname); 2273} 2274 2275/* 2276 * Track the makefiles we read - so makefiles can 2277 * set dependencies on them. 2278 * Avoid adding anything more than once. 2279 */ 2280 2281static void 2282ParseTrackInput(const char *name) 2283{ 2284 char *old; 2285 char *fp = NULL; 2286 size_t name_len = strlen(name); 2287 2288 old = Var_Value(MAKE_MAKEFILES, VAR_GLOBAL, &fp); 2289 if (old) { 2290 /* does it contain name? */ 2291 for (; old != NULL; old = strchr(old, ' ')) { 2292 if (*old == ' ') 2293 old++; 2294 if (memcmp(old, name, name_len) == 0 2295 && (old[name_len] == 0 || old[name_len] == ' ')) 2296 goto cleanup; 2297 } 2298 } 2299 Var_Append (MAKE_MAKEFILES, name, VAR_GLOBAL); 2300 cleanup: 2301 if (fp) { 2302 free(fp); 2303 } 2304} 2305 2306 2307/*- 2308 *--------------------------------------------------------------------- 2309 * Parse_setInput -- 2310 * Start Parsing from the given source 2311 * 2312 * Results: 2313 * None 2314 * 2315 * Side Effects: 2316 * A structure is added to the includes Lst and readProc, lineno, 2317 * fname and curFile are altered for the new file 2318 *--------------------------------------------------------------------- 2319 */ 2320void 2321Parse_SetInput(const char *name, int line, int fd, 2322 char *(*nextbuf)(void *, size_t *), void *arg) 2323{ 2324 char *buf; 2325 size_t len; 2326 2327 if (name == NULL) 2328 name = curFile->fname; 2329 else 2330 ParseTrackInput(name); 2331 2332 if (DEBUG(PARSE)) 2333 fprintf(debug_file, "Parse_SetInput: file %s, line %d, fd %d, nextbuf %p, arg %p\n", 2334 name, line, fd, nextbuf, arg); 2335 2336 if (fd == -1 && nextbuf == NULL) 2337 /* sanity */ 2338 return; 2339 2340 if (curFile != NULL) 2341 /* Save exiting file info */ 2342 Lst_AtFront(includes, curFile); 2343 2344 /* Allocate and fill in new structure */ 2345 curFile = bmake_malloc(sizeof *curFile); 2346 2347 /* 2348 * Once the previous state has been saved, we can get down to reading 2349 * the new file. We set up the name of the file to be the absolute 2350 * name of the include file so error messages refer to the right 2351 * place. 2352 */ 2353 curFile->fname = bmake_strdup(name); 2354 curFile->lineno = line; 2355 curFile->first_lineno = line; 2356 curFile->nextbuf = nextbuf; 2357 curFile->nextbuf_arg = arg; 2358 curFile->lf = NULL; 2359 2360 assert(nextbuf != NULL); 2361 2362 /* Get first block of input data */ 2363 buf = curFile->nextbuf(curFile->nextbuf_arg, &len); 2364 if (buf == NULL) { 2365 /* Was all a waste of time ... */ 2366 if (curFile->fname) 2367 free(curFile->fname); 2368 free(curFile); 2369 return; 2370 } 2371 curFile->P_str = buf; 2372 curFile->P_ptr = buf; 2373 curFile->P_end = buf+len; 2374 2375 curFile->cond_depth = Cond_save_depth(); 2376 ParseSetParseFile(name); 2377} 2378 2379#ifdef SYSVINCLUDE 2380/*- 2381 *--------------------------------------------------------------------- 2382 * ParseTraditionalInclude -- 2383 * Push to another file. 2384 * 2385 * The input is the current line. The file name(s) are 2386 * following the "include". 2387 * 2388 * Results: 2389 * None 2390 * 2391 * Side Effects: 2392 * A structure is added to the includes Lst and readProc, lineno, 2393 * fname and curFILE are altered for the new file 2394 *--------------------------------------------------------------------- 2395 */ 2396static void 2397ParseTraditionalInclude(char *line) 2398{ 2399 char *cp; /* current position in file spec */ 2400 int done = 0; 2401 int silent = (line[0] != 'i') ? 1 : 0; 2402 char *file = &line[silent + 7]; 2403 char *all_files; 2404 2405 if (DEBUG(PARSE)) { 2406 fprintf(debug_file, "ParseTraditionalInclude: %s\n", file); 2407 } 2408 2409 /* 2410 * Skip over whitespace 2411 */ 2412 while (isspace((unsigned char)*file)) 2413 file++; 2414 2415 /* 2416 * Substitute for any variables in the file name before trying to 2417 * find the thing. 2418 */ 2419 all_files = Var_Subst(NULL, file, VAR_CMD, FALSE); 2420 2421 if (*file == '\0') { 2422 Parse_Error(PARSE_FATAL, 2423 "Filename missing from \"include\""); 2424 return; 2425 } 2426 2427 for (file = all_files; !done; file = cp + 1) { 2428 /* Skip to end of line or next whitespace */ 2429 for (cp = file; *cp && !isspace((unsigned char) *cp); cp++) 2430 continue; 2431 2432 if (*cp) 2433 *cp = '\0'; 2434 else 2435 done = 1; 2436 2437 Parse_include_file(file, FALSE, silent); 2438 } 2439 free(all_files); 2440} 2441#endif 2442 2443#ifdef GMAKEEXPORT 2444/*- 2445 *--------------------------------------------------------------------- 2446 * ParseGmakeExport -- 2447 * Parse export <variable>=<value> 2448 * 2449 * And set the environment with it. 2450 * 2451 * Results: 2452 * None 2453 * 2454 * Side Effects: 2455 * None 2456 *--------------------------------------------------------------------- 2457 */ 2458static void 2459ParseGmakeExport(char *line) 2460{ 2461 char *variable = &line[6]; 2462 char *value; 2463 2464 if (DEBUG(PARSE)) { 2465 fprintf(debug_file, "ParseGmakeExport: %s\n", variable); 2466 } 2467 2468 /* 2469 * Skip over whitespace 2470 */ 2471 while (isspace((unsigned char)*variable)) 2472 variable++; 2473 2474 for (value = variable; *value && *value != '='; value++) 2475 continue; 2476 2477 if (*value != '=') { 2478 Parse_Error(PARSE_FATAL, 2479 "Variable/Value missing from \"export\""); 2480 return; 2481 } 2482 *value++ = '\0'; /* terminate variable */ 2483 2484 /* 2485 * Expand the value before putting it in the environment. 2486 */ 2487 value = Var_Subst(NULL, value, VAR_CMD, FALSE); 2488 setenv(variable, value, 1); 2489} 2490#endif 2491 2492/*- 2493 *--------------------------------------------------------------------- 2494 * ParseEOF -- 2495 * Called when EOF is reached in the current file. If we were reading 2496 * an include file, the includes stack is popped and things set up 2497 * to go back to reading the previous file at the previous location. 2498 * 2499 * Results: 2500 * CONTINUE if there's more to do. DONE if not. 2501 * 2502 * Side Effects: 2503 * The old curFILE, is closed. The includes list is shortened. 2504 * lineno, curFILE, and fname are changed if CONTINUE is returned. 2505 *--------------------------------------------------------------------- 2506 */ 2507static int 2508ParseEOF(void) 2509{ 2510 char *ptr; 2511 size_t len; 2512 2513 assert(curFile->nextbuf != NULL); 2514 2515 /* get next input buffer, if any */ 2516 ptr = curFile->nextbuf(curFile->nextbuf_arg, &len); 2517 curFile->P_ptr = ptr; 2518 curFile->P_str = ptr; 2519 curFile->P_end = ptr + len; 2520 curFile->lineno = curFile->first_lineno; 2521 if (ptr != NULL) { 2522 /* Iterate again */ 2523 return CONTINUE; 2524 } 2525 2526 /* Ensure the makefile (or loop) didn't have mismatched conditionals */ 2527 Cond_restore_depth(curFile->cond_depth); 2528 2529 if (curFile->lf != NULL) { 2530 loadedfile_destroy(curFile->lf); 2531 curFile->lf = NULL; 2532 } 2533 2534 /* Dispose of curFile info */ 2535 /* Leak curFile->fname because all the gnodes have pointers to it */ 2536 free(curFile->P_str); 2537 free(curFile); 2538 2539 curFile = Lst_DeQueue(includes); 2540 2541 if (curFile == NULL) { 2542 /* We've run out of input */ 2543 Var_Delete(".PARSEDIR", VAR_GLOBAL); 2544 Var_Delete(".PARSEFILE", VAR_GLOBAL); 2545 return DONE; 2546 } 2547 2548 if (DEBUG(PARSE)) 2549 fprintf(debug_file, "ParseEOF: returning to file %s, line %d\n", 2550 curFile->fname, curFile->lineno); 2551 2552 /* Restore the PARSEDIR/PARSEFILE variables */ 2553 ParseSetParseFile(curFile->fname); 2554 return (CONTINUE); 2555} 2556 2557#define PARSE_RAW 1 2558#define PARSE_SKIP 2 2559 2560static char * 2561ParseGetLine(int flags, int *length) 2562{ 2563 IFile *cf = curFile; 2564 char *ptr; 2565 char ch; 2566 char *line; 2567 char *line_end; 2568 char *escaped; 2569 char *comment; 2570 char *tp; 2571 2572 /* Loop through blank lines and comment lines */ 2573 for (;;) { 2574 cf->lineno++; 2575 line = cf->P_ptr; 2576 ptr = line; 2577 line_end = line; 2578 escaped = NULL; 2579 comment = NULL; 2580 for (;;) { 2581 if (cf->P_end != NULL && ptr == cf->P_end) { 2582 /* end of buffer */ 2583 ch = 0; 2584 break; 2585 } 2586 ch = *ptr; 2587 if (ch == 0 || (ch == '\\' && ptr[1] == 0)) { 2588 if (cf->P_end == NULL) 2589 /* End of string (aka for loop) data */ 2590 break; 2591 /* see if there is more we can parse */ 2592 while (ptr++ < cf->P_end) { 2593 if ((ch = *ptr) == '\n') { 2594 if (ptr > line && ptr[-1] == '\\') 2595 continue; 2596 Parse_Error(PARSE_WARNING, 2597 "Zero byte read from file, skipping rest of line."); 2598 break; 2599 } 2600 } 2601 if (cf->nextbuf != NULL) { 2602 /* 2603 * End of this buffer; return EOF and outer logic 2604 * will get the next one. (eww) 2605 */ 2606 break; 2607 } 2608 Parse_Error(PARSE_FATAL, "Zero byte read from file"); 2609 return NULL; 2610 } 2611 2612 if (ch == '\\') { 2613 /* Don't treat next character as special, remember first one */ 2614 if (escaped == NULL) 2615 escaped = ptr; 2616 if (ptr[1] == '\n') 2617 cf->lineno++; 2618 ptr += 2; 2619 line_end = ptr; 2620 continue; 2621 } 2622 if (ch == '#' && comment == NULL) { 2623 /* Remember first '#' for comment stripping */ 2624 /* Unless previous char was '[', as in modifier :[#] */ 2625 if (!(ptr > line && ptr[-1] == '[')) 2626 comment = line_end; 2627 } 2628 ptr++; 2629 if (ch == '\n') 2630 break; 2631 if (!isspace((unsigned char)ch)) 2632 /* We are not interested in trailing whitespace */ 2633 line_end = ptr; 2634 } 2635 2636 /* Save next 'to be processed' location */ 2637 cf->P_ptr = ptr; 2638 2639 /* Check we have a non-comment, non-blank line */ 2640 if (line_end == line || comment == line) { 2641 if (ch == 0) 2642 /* At end of file */ 2643 return NULL; 2644 /* Parse another line */ 2645 continue; 2646 } 2647 2648 /* We now have a line of data */ 2649 *line_end = 0; 2650 2651 if (flags & PARSE_RAW) { 2652 /* Leave '\' (etc) in line buffer (eg 'for' lines) */ 2653 *length = line_end - line; 2654 return line; 2655 } 2656 2657 if (flags & PARSE_SKIP) { 2658 /* Completely ignore non-directives */ 2659 if (line[0] != '.') 2660 continue; 2661 /* We could do more of the .else/.elif/.endif checks here */ 2662 } 2663 break; 2664 } 2665 2666 /* Brutally ignore anything after a non-escaped '#' in non-commands */ 2667 if (comment != NULL && line[0] != '\t') { 2668 line_end = comment; 2669 *line_end = 0; 2670 } 2671 2672 /* If we didn't see a '\\' then the in-situ data is fine */ 2673 if (escaped == NULL) { 2674 *length = line_end - line; 2675 return line; 2676 } 2677 2678 /* Remove escapes from '\n' and '#' */ 2679 tp = ptr = escaped; 2680 escaped = line; 2681 for (; ; *tp++ = ch) { 2682 ch = *ptr++; 2683 if (ch != '\\') { 2684 if (ch == 0) 2685 break; 2686 continue; 2687 } 2688 2689 ch = *ptr++; 2690 if (ch == 0) { 2691 /* Delete '\\' at end of buffer */ 2692 tp--; 2693 break; 2694 } 2695 2696 if (ch == '#' && line[0] != '\t') 2697 /* Delete '\\' from before '#' on non-command lines */ 2698 continue; 2699 2700 if (ch != '\n') { 2701 /* Leave '\\' in buffer for later */ 2702 *tp++ = '\\'; 2703 /* Make sure we don't delete an escaped ' ' from the line end */ 2704 escaped = tp + 1; 2705 continue; 2706 } 2707 2708 /* Escaped '\n' replace following whitespace with a single ' ' */ 2709 while (ptr[0] == ' ' || ptr[0] == '\t') 2710 ptr++; 2711 ch = ' '; 2712 } 2713 2714 /* Delete any trailing spaces - eg from empty continuations */ 2715 while (tp > escaped && isspace((unsigned char)tp[-1])) 2716 tp--; 2717 2718 *tp = 0; 2719 *length = tp - line; 2720 return line; 2721} 2722 2723/*- 2724 *--------------------------------------------------------------------- 2725 * ParseReadLine -- 2726 * Read an entire line from the input file. Called only by Parse_File. 2727 * 2728 * Results: 2729 * A line w/o its newline 2730 * 2731 * Side Effects: 2732 * Only those associated with reading a character 2733 *--------------------------------------------------------------------- 2734 */ 2735static char * 2736ParseReadLine(void) 2737{ 2738 char *line; /* Result */ 2739 int lineLength; /* Length of result */ 2740 int lineno; /* Saved line # */ 2741 int rval; 2742 2743 for (;;) { 2744 line = ParseGetLine(0, &lineLength); 2745 if (line == NULL) 2746 return NULL; 2747 2748 if (line[0] != '.') 2749 return line; 2750 2751 /* 2752 * The line might be a conditional. Ask the conditional module 2753 * about it and act accordingly 2754 */ 2755 switch (Cond_Eval(line)) { 2756 case COND_SKIP: 2757 /* Skip to next conditional that evaluates to COND_PARSE. */ 2758 do { 2759 line = ParseGetLine(PARSE_SKIP, &lineLength); 2760 } while (line && Cond_Eval(line) != COND_PARSE); 2761 if (line == NULL) 2762 break; 2763 continue; 2764 case COND_PARSE: 2765 continue; 2766 case COND_INVALID: /* Not a conditional line */ 2767 /* Check for .for loops */ 2768 rval = For_Eval(line); 2769 if (rval == 0) 2770 /* Not a .for line */ 2771 break; 2772 if (rval < 0) 2773 /* Syntax error - error printed, ignore line */ 2774 continue; 2775 /* Start of a .for loop */ 2776 lineno = curFile->lineno; 2777 /* Accumulate loop lines until matching .endfor */ 2778 do { 2779 line = ParseGetLine(PARSE_RAW, &lineLength); 2780 if (line == NULL) { 2781 Parse_Error(PARSE_FATAL, 2782 "Unexpected end of file in for loop."); 2783 break; 2784 } 2785 } while (For_Accum(line)); 2786 /* Stash each iteration as a new 'input file' */ 2787 For_Run(lineno); 2788 /* Read next line from for-loop buffer */ 2789 continue; 2790 } 2791 return (line); 2792 } 2793} 2794 2795/*- 2796 *----------------------------------------------------------------------- 2797 * ParseFinishLine -- 2798 * Handle the end of a dependency group. 2799 * 2800 * Results: 2801 * Nothing. 2802 * 2803 * Side Effects: 2804 * inLine set FALSE. 'targets' list destroyed. 2805 * 2806 *----------------------------------------------------------------------- 2807 */ 2808static void 2809ParseFinishLine(void) 2810{ 2811 if (inLine) { 2812 Lst_ForEach(targets, Suff_EndTransform, NULL); 2813 Lst_Destroy(targets, ParseHasCommands); 2814 targets = NULL; 2815 inLine = FALSE; 2816 } 2817} 2818 2819 2820/*- 2821 *--------------------------------------------------------------------- 2822 * Parse_File -- 2823 * Parse a file into its component parts, incorporating it into the 2824 * current dependency graph. This is the main function and controls 2825 * almost every other function in this module 2826 * 2827 * Input: 2828 * name the name of the file being read 2829 * fd Open file to makefile to parse 2830 * 2831 * Results: 2832 * None 2833 * 2834 * Side Effects: 2835 * closes fd. 2836 * Loads. Nodes are added to the list of all targets, nodes and links 2837 * are added to the dependency graph. etc. etc. etc. 2838 *--------------------------------------------------------------------- 2839 */ 2840void 2841Parse_File(const char *name, int fd) 2842{ 2843 char *cp; /* pointer into the line */ 2844 char *line; /* the line we're working on */ 2845 struct loadedfile *lf; 2846 2847 lf = loadfile(name, fd); 2848 2849 inLine = FALSE; 2850 fatals = 0; 2851 2852 if (name == NULL) { 2853 name = "(stdin)"; 2854 } 2855 2856 Parse_SetInput(name, 0, -1, loadedfile_nextbuf, lf); 2857 curFile->lf = lf; 2858 2859 do { 2860 for (; (line = ParseReadLine()) != NULL; ) { 2861 if (DEBUG(PARSE)) 2862 fprintf(debug_file, "ParseReadLine (%d): '%s'\n", 2863 curFile->lineno, line); 2864 if (*line == '.') { 2865 /* 2866 * Lines that begin with the special character may be 2867 * include or undef directives. 2868 * On the other hand they can be suffix rules (.c.o: ...) 2869 * or just dependencies for filenames that start '.'. 2870 */ 2871 for (cp = line + 1; isspace((unsigned char)*cp); cp++) { 2872 continue; 2873 } 2874 if (strncmp(cp, "include", 7) == 0 || 2875 ((cp[0] == 's' || cp[0] == '-') && 2876 strncmp(&cp[1], "include", 7) == 0)) { 2877 ParseDoInclude(cp); 2878 continue; 2879 } 2880 if (strncmp(cp, "undef", 5) == 0) { 2881 char *cp2; 2882 for (cp += 5; isspace((unsigned char) *cp); cp++) 2883 continue; 2884 for (cp2 = cp; !isspace((unsigned char) *cp2) && 2885 (*cp2 != '\0'); cp2++) 2886 continue; 2887 *cp2 = '\0'; 2888 Var_Delete(cp, VAR_GLOBAL); 2889 continue; 2890 } else if (strncmp(cp, "export", 6) == 0) { 2891 for (cp += 6; isspace((unsigned char) *cp); cp++) 2892 continue; 2893 Var_Export(cp, 1); 2894 continue; 2895 } else if (strncmp(cp, "unexport", 8) == 0) { 2896 Var_UnExport(cp); 2897 continue; 2898 } else if (strncmp(cp, "info", 4) == 0 || 2899 strncmp(cp, "error", 5) == 0 || 2900 strncmp(cp, "warning", 7) == 0) { 2901 if (ParseMessage(cp)) 2902 continue; 2903 } 2904 } 2905 2906 if (*line == '\t') { 2907 /* 2908 * If a line starts with a tab, it can only hope to be 2909 * a creation command. 2910 */ 2911 cp = line + 1; 2912 shellCommand: 2913 for (; isspace ((unsigned char)*cp); cp++) { 2914 continue; 2915 } 2916 if (*cp) { 2917 if (!inLine) 2918 Parse_Error(PARSE_FATAL, 2919 "Unassociated shell command \"%s\"", 2920 cp); 2921 /* 2922 * So long as it's not a blank line and we're actually 2923 * in a dependency spec, add the command to the list of 2924 * commands of all targets in the dependency spec 2925 */ 2926 if (targets) { 2927 cp = bmake_strdup(cp); 2928 Lst_ForEach(targets, ParseAddCmd, cp); 2929#ifdef CLEANUP 2930 Lst_AtEnd(targCmds, cp); 2931#endif 2932 } 2933 } 2934 continue; 2935 } 2936 2937#ifdef SYSVINCLUDE 2938 if (((strncmp(line, "include", 7) == 0 && 2939 isspace((unsigned char) line[7])) || 2940 ((line[0] == 's' || line[0] == '-') && 2941 strncmp(&line[1], "include", 7) == 0 && 2942 isspace((unsigned char) line[8]))) && 2943 strchr(line, ':') == NULL) { 2944 /* 2945 * It's an S3/S5-style "include". 2946 */ 2947 ParseTraditionalInclude(line); 2948 continue; 2949 } 2950#endif 2951#ifdef GMAKEEXPORT 2952 if (strncmp(line, "export", 6) == 0 && 2953 isspace((unsigned char) line[6]) && 2954 strchr(line, ':') == NULL) { 2955 /* 2956 * It's a Gmake "export". 2957 */ 2958 ParseGmakeExport(line); 2959 continue; 2960 } 2961#endif 2962 if (Parse_IsVar(line)) { 2963 ParseFinishLine(); 2964 Parse_DoVar(line, VAR_GLOBAL); 2965 continue; 2966 } 2967 2968#ifndef POSIX 2969 /* 2970 * To make life easier on novices, if the line is indented we 2971 * first make sure the line has a dependency operator in it. 2972 * If it doesn't have an operator and we're in a dependency 2973 * line's script, we assume it's actually a shell command 2974 * and add it to the current list of targets. 2975 */ 2976 cp = line; 2977 if (isspace((unsigned char) line[0])) { 2978 while ((*cp != '\0') && isspace((unsigned char) *cp)) 2979 cp++; 2980 while (*cp && (ParseIsEscaped(line, cp) || 2981 (*cp != ':') && (*cp != '!'))) { 2982 cp++; 2983 } 2984 if (*cp == '\0') { 2985 if (inLine) { 2986 Parse_Error(PARSE_WARNING, 2987 "Shell command needs a leading tab"); 2988 goto shellCommand; 2989 } 2990 } 2991 } 2992#endif 2993 ParseFinishLine(); 2994 2995 /* 2996 * For some reason - probably to make the parser impossible - 2997 * a ';' can be used to separate commands from dependencies. 2998 * Attempt to avoid ';' inside substitution patterns. 2999 */ 3000 { 3001 int level = 0; 3002 3003 for (cp = line; *cp != 0; cp++) { 3004 if (*cp == '\\' && cp[1] != 0) { 3005 cp++; 3006 continue; 3007 } 3008 if (*cp == '$' && 3009 (cp[1] == '(' || cp[1] == '{')) { 3010 level++; 3011 continue; 3012 } 3013 if (level > 0) { 3014 if (*cp == ')' || *cp == '}') { 3015 level--; 3016 continue; 3017 } 3018 } else if (*cp == ';') { 3019 break; 3020 } 3021 } 3022 } 3023 if (*cp != 0) 3024 /* Terminate the dependency list at the ';' */ 3025 *cp++ = 0; 3026 else 3027 cp = NULL; 3028 3029 /* 3030 * We now know it's a dependency line so it needs to have all 3031 * variables expanded before being parsed. Tell the variable 3032 * module to complain if some variable is undefined... 3033 */ 3034 line = Var_Subst(NULL, line, VAR_CMD, TRUE); 3035 3036 /* 3037 * Need a non-circular list for the target nodes 3038 */ 3039 if (targets) 3040 Lst_Destroy(targets, NULL); 3041 3042 targets = Lst_Init(FALSE); 3043 inLine = TRUE; 3044 3045 ParseDoDependency(line); 3046 free(line); 3047 3048 /* If there were commands after a ';', add them now */ 3049 if (cp != NULL) { 3050 goto shellCommand; 3051 } 3052 } 3053 /* 3054 * Reached EOF, but it may be just EOF of an include file... 3055 */ 3056 } while (ParseEOF() == CONTINUE); 3057 3058 if (fatals) { 3059 (void)fflush(stdout); 3060 (void)fprintf(stderr, 3061 "%s: Fatal errors encountered -- cannot continue", 3062 progname); 3063 PrintOnError(NULL, NULL); 3064 exit(1); 3065 } 3066} 3067 3068/*- 3069 *--------------------------------------------------------------------- 3070 * Parse_Init -- 3071 * initialize the parsing module 3072 * 3073 * Results: 3074 * none 3075 * 3076 * Side Effects: 3077 * the parseIncPath list is initialized... 3078 *--------------------------------------------------------------------- 3079 */ 3080void 3081Parse_Init(void) 3082{ 3083 mainNode = NULL; 3084 parseIncPath = Lst_Init(FALSE); 3085 sysIncPath = Lst_Init(FALSE); 3086 defIncPath = Lst_Init(FALSE); 3087 includes = Lst_Init(FALSE); 3088#ifdef CLEANUP 3089 targCmds = Lst_Init(FALSE); 3090#endif 3091} 3092 3093void 3094Parse_End(void) 3095{ 3096#ifdef CLEANUP 3097 Lst_Destroy(targCmds, (FreeProc *)free); 3098 if (targets) 3099 Lst_Destroy(targets, NULL); 3100 Lst_Destroy(defIncPath, Dir_Destroy); 3101 Lst_Destroy(sysIncPath, Dir_Destroy); 3102 Lst_Destroy(parseIncPath, Dir_Destroy); 3103 Lst_Destroy(includes, NULL); /* Should be empty now */ 3104#endif 3105} 3106 3107 3108/*- 3109 *----------------------------------------------------------------------- 3110 * Parse_MainName -- 3111 * Return a Lst of the main target to create for main()'s sake. If 3112 * no such target exists, we Punt with an obnoxious error message. 3113 * 3114 * Results: 3115 * A Lst of the single node to create. 3116 * 3117 * Side Effects: 3118 * None. 3119 * 3120 *----------------------------------------------------------------------- 3121 */ 3122Lst 3123Parse_MainName(void) 3124{ 3125 Lst mainList; /* result list */ 3126 3127 mainList = Lst_Init(FALSE); 3128 3129 if (mainNode == NULL) { 3130 Punt("no target to make."); 3131 /*NOTREACHED*/ 3132 } else if (mainNode->type & OP_DOUBLEDEP) { 3133 (void)Lst_AtEnd(mainList, mainNode); 3134 Lst_Concat(mainList, mainNode->cohorts, LST_CONCNEW); 3135 } 3136 else 3137 (void)Lst_AtEnd(mainList, mainNode); 3138 Var_Append(".TARGETS", mainNode->name, VAR_GLOBAL); 3139 return (mainList); 3140} 3141 3142/*- 3143 *----------------------------------------------------------------------- 3144 * ParseMark -- 3145 * Add the filename and lineno to the GNode so that we remember 3146 * where it was first defined. 3147 * 3148 * Side Effects: 3149 * None. 3150 * 3151 *----------------------------------------------------------------------- 3152 */ 3153static void 3154ParseMark(GNode *gn) 3155{ 3156 gn->fname = curFile->fname; 3157 gn->lineno = curFile->lineno; 3158} 3159