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main.c (163638) main.c (169507)
1/*
2 * Copyright (c) 1980, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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33 The Regents of the University of California. All rights reserved.\n";
34#endif /* not lint */
35
36#ifndef lint
37#if 0
38static char sccsid[] = "@(#)main.c 8.1 (Berkeley) 6/6/93";
39#endif
40static const char rcsid[] =
1/*
2 * Copyright (c) 1980, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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33 The Regents of the University of California. All rights reserved.\n";
34#endif /* not lint */
35
36#ifndef lint
37#if 0
38static char sccsid[] = "@(#)main.c 8.1 (Berkeley) 6/6/93";
39#endif
40static const char rcsid[] =
41 "$FreeBSD: head/usr.sbin/config/main.c 163638 2006-10-24 00:31:59Z imp $";
41 "$FreeBSD: head/usr.sbin/config/main.c 169507 2007-05-12 19:38:18Z wkoszek $";
42#endif /* not lint */
43
44#include <sys/types.h>
45#include <sys/stat.h>
42#endif /* not lint */
43
44#include <sys/types.h>
45#include <sys/stat.h>
46#include <sys/sbuf.h>
46#include <sys/file.h>
47#include <sys/mman.h>
48#include <sys/param.h>
47#include <sys/file.h>
48#include <sys/mman.h>
49#include <sys/param.h>
50
51#include <assert.h>
49#include <ctype.h>
50#include <err.h>
51#include <stdio.h>
52#include <sysexits.h>
53#include <unistd.h>
54#include <dirent.h>
55#include "y.tab.h"
56#include "config.h"

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68
69char * PREFIX;
70char destdir[MAXPATHLEN];
71char srcdir[MAXPATHLEN];
72
73int debugging;
74int profiling;
75int found_defaults;
52#include <ctype.h>
53#include <err.h>
54#include <stdio.h>
55#include <sysexits.h>
56#include <unistd.h>
57#include <dirent.h>
58#include "y.tab.h"
59#include "config.h"

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71
72char * PREFIX;
73char destdir[MAXPATHLEN];
74char srcdir[MAXPATHLEN];
75
76int debugging;
77int profiling;
78int found_defaults;
79int incignore;
76
80
81/*
82 * Preserve old behaviour in INCLUDE_CONFIG_FILE handling (files are included
83 * literally).
84 */
85int filebased = 0;
86
77static void configfile(void);
78static void get_srcdir(void);
79static void usage(void);
80static void cleanheaders(char *);
87static void configfile(void);
88static void get_srcdir(void);
89static void usage(void);
90static void cleanheaders(char *);
91static void kernconfdump(const char *);
81
82struct hdr_list {
83 char *h_name;
84 struct hdr_list *h_next;
85} *htab;
86
87/*
88 * Config builds a set of files for building a UNIX
89 * system given a description of the desired system.
90 */
91int
92main(int argc, char **argv)
93{
94
95 struct stat buf;
96 int ch, len;
97 char *p;
98 char xxx[MAXPATHLEN];
92
93struct hdr_list {
94 char *h_name;
95 struct hdr_list *h_next;
96} *htab;
97
98/*
99 * Config builds a set of files for building a UNIX
100 * system given a description of the desired system.
101 */
102int
103main(int argc, char **argv)
104{
105
106 struct stat buf;
107 int ch, len;
108 char *p;
109 char xxx[MAXPATHLEN];
99 FILE *fp;
110 char *kernfile;
100
111
101 while ((ch = getopt(argc, argv, "d:gpV")) != -1)
112 kernfile = NULL;
113 while ((ch = getopt(argc, argv, "Cd:gpVx:")) != -1)
102 switch (ch) {
114 switch (ch) {
103 case 'V':
104 printf("%d\n", CONFIGVERS);
105 exit(0);
115 case 'C':
116 filebased = 1;
117 break;
106 case 'd':
107 if (*destdir == '\0')
108 strlcpy(destdir, optarg, sizeof(destdir));
109 else
110 errx(2, "directory already set");
111 break;
112 case 'g':
113 debugging++;
114 break;
115 case 'p':
116 profiling++;
117 break;
118 case 'd':
119 if (*destdir == '\0')
120 strlcpy(destdir, optarg, sizeof(destdir));
121 else
122 errx(2, "directory already set");
123 break;
124 case 'g':
125 debugging++;
126 break;
127 case 'p':
128 profiling++;
129 break;
130 case 'V':
131 printf("%d\n", CONFIGVERS);
132 exit(0);
133 case 'x':
134 kernfile = optarg;
135 break;
118 case '?':
119 default:
120 usage();
121 }
122 argc -= optind;
123 argv += optind;
124
136 case '?':
137 default:
138 usage();
139 }
140 argc -= optind;
141 argv += optind;
142
143 if (kernfile != NULL) {
144 kernconfdump(kernfile);
145 exit(EXIT_SUCCESS);
146 }
147
125 if (argc != 1)
126 usage();
127
128 PREFIX = *argv;
148 if (argc != 1)
149 usage();
150
151 PREFIX = *argv;
129 fp = fopen(PREFIX, "r");
130 if (fp == NULL)
152 /*
153 * We mark lack of DEFAULTS here. Once we hit EOF in PREFIX, yywrap()
154 * will try to bring DEFAULTS to the playground, if this exists.
155 */
156 found_defaults = 0;
157 if (freopen(PREFIX, "r", stdin) == NULL)
131 err(2, "%s", PREFIX);
158 err(2, "%s", PREFIX);
132 fclose(fp);
133 if (freopen("DEFAULTS", "r", stdin) != NULL) {
134 found_defaults = 1;
135 yyfile = "DEFAULTS";
136 } else {
137 if (freopen(PREFIX, "r", stdin) == NULL)
138 err(2, "%s", PREFIX);
139 yyfile = PREFIX;
140 }
141
159 yyfile = PREFIX;
142 if (*destdir != '\0') {
143 len = strlen(destdir);
144 while (len > 1 && destdir[len - 1] == '/')
145 destdir[--len] = '\0';
146 get_srcdir();
147 } else {
148 strlcpy(destdir, CDIR, sizeof(destdir));
149 strlcat(destdir, PREFIX, sizeof(destdir));
150 }
151
152 p = path((char *)NULL);
153 if (stat(p, &buf)) {
154 if (mkdir(p, 0777))
155 err(2, "%s", p);
156 } else if (!S_ISDIR(buf.st_mode))
157 errx(2, "%s isn't a directory", p);
158
160 if (*destdir != '\0') {
161 len = strlen(destdir);
162 while (len > 1 && destdir[len - 1] == '/')
163 destdir[--len] = '\0';
164 get_srcdir();
165 } else {
166 strlcpy(destdir, CDIR, sizeof(destdir));
167 strlcat(destdir, PREFIX, sizeof(destdir));
168 }
169
170 p = path((char *)NULL);
171 if (stat(p, &buf)) {
172 if (mkdir(p, 0777))
173 err(2, "%s", p);
174 } else if (!S_ISDIR(buf.st_mode))
175 errx(2, "%s isn't a directory", p);
176
177 SLIST_INIT(&cputype);
178 SLIST_INIT(&mkopt);
179 SLIST_INIT(&opt);
180 SLIST_INIT(&rmopts);
181 STAILQ_INIT(&cfgfiles);
159 STAILQ_INIT(&dtab);
160 STAILQ_INIT(&fntab);
182 STAILQ_INIT(&dtab);
183 STAILQ_INIT(&fntab);
161 SLIST_INIT(&cputype);
162 STAILQ_INIT(&ftab);
163 STAILQ_INIT(&hints);
184 STAILQ_INIT(&ftab);
185 STAILQ_INIT(&hints);
186 STAILQ_INIT(&rmdtab);
164 if (yyparse())
165 exit(3);
166
167 /*
168 * Ensure that required elements (machine, cpu, ident) are present.
169 */
170 if (machinename == NULL) {
171 printf("Specify machine type, e.g. ``machine i386''\n");

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201 (void)snprintf(xxx, sizeof(xxx), "../../../%s/include",
202 machinearch);
203 else
204 (void)snprintf(xxx, sizeof(xxx), "%s/%s/include",
205 srcdir, machinearch);
206 (void) unlink(path(machinearch));
207 (void) symlink(xxx, path(machinearch));
208 }
187 if (yyparse())
188 exit(3);
189
190 /*
191 * Ensure that required elements (machine, cpu, ident) are present.
192 */
193 if (machinename == NULL) {
194 printf("Specify machine type, e.g. ``machine i386''\n");

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224 (void)snprintf(xxx, sizeof(xxx), "../../../%s/include",
225 machinearch);
226 else
227 (void)snprintf(xxx, sizeof(xxx), "%s/%s/include",
228 srcdir, machinearch);
229 (void) unlink(path(machinearch));
230 (void) symlink(xxx, path(machinearch));
231 }
232 configfile(); /* put config file into kernel*/
209 options(); /* make options .h files */
210 makefile(); /* build Makefile */
211 makeenv(); /* build env.c */
212 makehints(); /* build hints.c */
213 headers(); /* make a lot of .h files */
233 options(); /* make options .h files */
234 makefile(); /* build Makefile */
235 makeenv(); /* build env.c */
236 makehints(); /* build hints.c */
237 headers(); /* make a lot of .h files */
214 configfile(); /* put config file into kernel*/
215 cleanheaders(p);
216 printf("Kernel build directory is %s\n", p);
217 printf("Don't forget to do ``make cleandepend && make depend''\n");
218 exit(0);
219}
220
221/*
222 * get_srcdir

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230 if (realpath("../..", srcdir) == NULL)
231 errx(2, "Unable to find root of source tree");
232}
233
234static void
235usage(void)
236{
237
238 cleanheaders(p);
239 printf("Kernel build directory is %s\n", p);
240 printf("Don't forget to do ``make cleandepend && make depend''\n");
241 exit(0);
242}
243
244/*
245 * get_srcdir

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253 if (realpath("../..", srcdir) == NULL)
254 errx(2, "Unable to find root of source tree");
255}
256
257static void
258usage(void)
259{
260
238 fprintf(stderr, "usage: config [-Vgp] [-d destdir] sysname\n");
239 exit(1);
261 fprintf(stderr, "usage: config [-CgpV] [-d destdir] sysname\n");
262 fprintf(stderr, " config -x kernel\n");
263 exit(EX_USAGE);
240}
241
242/*
243 * get_word
244 * returns EOF on end of file
245 * NULL on end of line
246 * pointer to the word otherwise
247 */

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357
358 if (file)
359 asprintf(&cp, "%s/%s", destdir, file);
360 else
361 cp = strdup(destdir);
362 return (cp);
363}
364
264}
265
266/*
267 * get_word
268 * returns EOF on end of file
269 * NULL on end of line
270 * pointer to the word otherwise
271 */

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381
382 if (file)
383 asprintf(&cp, "%s/%s", destdir, file);
384 else
385 cp = strdup(destdir);
386 return (cp);
387}
388
389/*
390 * Generate configuration file based on actual settings. With this mode, user
391 * will be able to obtain and build conifguration file with one command.
392 */
365static void
393static void
394configfile_dynamic(struct sbuf *sb)
395{
396 struct cputype *cput;
397 struct device *d;
398 struct opt *ol;
399 char *lend;
400
401 asprintf(&lend, "\\n\\\n");
402 assert(lend != NULL);
403 sbuf_printf(sb, "options\t%s%s", OPT_AUTOGEN, lend);
404 sbuf_printf(sb, "ident\t%s%s", ident, lend);
405 sbuf_printf(sb, "machine\t%s%s", machinename, lend);
406 SLIST_FOREACH(cput, &cputype, cpu_next)
407 sbuf_printf(sb, "cpu\t%s%s", cput->cpu_name, lend);
408 SLIST_FOREACH(ol, &mkopt, op_next)
409 sbuf_printf(sb, "makeoptions\t%s=%s%s", ol->op_name,
410 ol->op_value, lend);
411 SLIST_FOREACH(ol, &opt, op_next) {
412 if (strncmp(ol->op_name, "DEV_", 4) == 0)
413 continue;
414 sbuf_printf(sb, "options\t%s", ol->op_name);
415 if (ol->op_value != NULL) {
416 sbuf_printf(sb, "=%s%s", ol->op_value, lend);
417 } else {
418 sbuf_printf(sb, "%s", lend);
419 }
420 }
421 /*
422 * Mark this file as containing everything we need.
423 */
424 STAILQ_FOREACH(d, &dtab, d_next)
425 sbuf_printf(sb, "device\t%s%s", d->d_name, lend);
426 free(lend);
427}
428
429/*
430 * Generate file from the configuration files.
431 */
432static void
433configfile_filebased(struct sbuf *sb)
434{
435 FILE *cff;
436 struct cfgfile *cf;
437 int i;
438
439 STAILQ_FOREACH(cf, &cfgfiles, cfg_next) {
440 cff = fopen(cf->cfg_path, "r");
441 if (cff == NULL) {
442 warn("Couldn't open file %s", cf->cfg_path);
443 continue;
444 }
445 while ((i = getc(cff)) != EOF) {
446 if (i == '\n')
447 sbuf_printf(sb, "\\n\\\n");
448 else if (i == '"' || i == '\'')
449 sbuf_printf(sb, "\\%c", i);
450 else
451 sbuf_putc(sb, i);
452 }
453 fclose(cff);
454 }
455}
456
457static void
366configfile(void)
367{
458configfile(void)
459{
368 FILE *fi, *fo;
460 FILE *fo;
461 struct sbuf *sb;
369 char *p;
462 char *p;
370 int i;
371
372 fi = fopen(PREFIX, "r");
373 if (!fi)
374 err(2, "%s", PREFIX);
375 fo = fopen(p=path("config.c.new"), "w");
463
464 /* Add main configuration file to the list of files to be included */
465 cfgfile_add(PREFIX);
466 p = path("config.c.new");
467 fo = fopen(p, "w");
376 if (!fo)
377 err(2, "%s", p);
468 if (!fo)
469 err(2, "%s", p);
378 fprintf(fo, "#include \"opt_config.h\"\n");
379 fprintf(fo, "#ifdef INCLUDE_CONFIG_FILE \n");
380 fprintf(fo, "const char config[] = \"\\\n");
381 fprintf(fo, "START CONFIG FILE %s\\n\\\n___", PREFIX);
382 while (EOF != (i=getc(fi))) {
383 if (i == '\n') {
384 fprintf(fo, "\\n\\\n___");
385 } else if (i == '\"') {
386 fprintf(fo, "\\\"");
387 } else if (i == '\\') {
388 fprintf(fo, "\\\\");
389 } else {
390 putc(i, fo);
391 }
470 sb = sbuf_new(NULL, NULL, 2048, SBUF_AUTOEXTEND);
471 assert(sb != NULL);
472 sbuf_clear(sb);
473 /*
474 * Try to read all configuration files. Since those will be present as
475 * C string in the macro, we have to slash their ends then the line
476 * wraps.
477 */
478 if (filebased) {
479 /* Is needed, can be used for backward compatibility. */
480 configfile_filebased(sb);
481 } else {
482 configfile_dynamic(sb);
392 }
483 }
393 fprintf(fo, "\\n\\\nEND CONFIG FILE %s\\n\\\n", PREFIX);
394 fprintf(fo, "\";\n");
395 fprintf(fo, "\n#endif /* INCLUDE_CONFIG_FILE */\n");
396 fclose(fi);
484 sbuf_finish(sb);
485 /*
486 * We print first part of the tamplate, replace our tag with
487 * configuration files content and later continue writing our
488 * template.
489 */
490 p = strstr(kernconfstr, KERNCONFTAG);
491 if (p == NULL)
492 errx(EXIT_FAILURE, "Something went terribly wrong!");
493 *p = '\0';
494 fprintf(fo, "%s", kernconfstr);
495 fprintf(fo, "%s", sbuf_data(sb));
496 p += strlen(KERNCONFTAG);
497 fprintf(fo, "%s", p);
498 sbuf_delete(sb);
397 fclose(fo);
398 moveifchanged(path("config.c.new"), path("config.c"));
499 fclose(fo);
500 moveifchanged(path("config.c.new"), path("config.c"));
501 cfgfile_removeall();
399}
400
401/*
402 * moveifchanged --
403 * compare two files; rename if changed.
404 */
405void
406moveifchanged(const char *from_name, const char *to_name)

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519 return;
520 }
521 }
522 hl = calloc(1, sizeof(*hl));
523 hl->h_name = s;
524 hl->h_next = htab;
525 htab = hl;
526}
502}
503
504/*
505 * moveifchanged --
506 * compare two files; rename if changed.
507 */
508void
509moveifchanged(const char *from_name, const char *to_name)

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622 return;
623 }
624 }
625 hl = calloc(1, sizeof(*hl));
626 hl->h_name = s;
627 hl->h_next = htab;
628 htab = hl;
629}
630
631/*
632 * This one is quick hack. Will be probably moved to elf(3) interface.
633 * It takes kernel configuration file name, passes it as an argument to
634 * elfdump -a, which output is parsed by some UNIX tools...
635 */
636static void
637kernconfdump(const char *file)
638{
639 struct stat st;
640 FILE *fp, *pp;
641 int error, len, osz, r;
642 unsigned int off, size;
643 char *cmd, *o;
644
645 r = open(file, O_RDONLY);
646 if (r == -1)
647 errx(EXIT_FAILURE, "Couldn't open file '%s'", file);
648 error = fstat(r, &st);
649 if (error == -1)
650 errx(EXIT_FAILURE, "fstat() failed");
651 if (S_ISDIR(st.st_mode))
652 errx(EXIT_FAILURE, "'%s' is a directory", file);
653 fp = fdopen(r, "r");
654 if (fp == NULL)
655 errx(EXIT_FAILURE, "fdopen() failed");
656 osz = 1024;
657 o = calloc(1, osz);
658 if (o == NULL)
659 errx(EXIT_FAILURE, "Couldn't allocate memory");
660 /* ELF note section header. */
661 asprintf(&cmd, "/usr/bin/elfdump -c %s | grep -A 5 kern_conf"
662 "| tail -2 | cut -d ' ' -f 2 | paste - - -", file);
663 if (cmd == NULL)
664 errx(EXIT_FAILURE, "asprintf() failed");
665 pp = popen(cmd, "r");
666 if (pp == NULL)
667 errx(EXIT_FAILURE, "popen() failed");
668 free(cmd);
669 len = fread(o, osz, 1, pp);
670 pclose(pp);
671 r = sscanf(o, "%d\t%d", &off, &size);
672 free(o);
673 if (r != 2)
674 errx(EXIT_FAILURE, "File %s doesn't contain configuration "
675 "file. Either unsupported, or not compiled with "
676 "INCLUDE_CONFIG_FILE", file);
677 r = fseek(fp, off, SEEK_CUR);
678 if (r != 0)
679 errx(EXIT_FAILURE, "fseek() failed");
680 while ((r = fgetc(fp)) != EOF && size-- > 0)
681 fputc(r, stdout);
682 fclose(fp);
683}