1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1980, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #include <sys/types.h>
33 #include <sys/stat.h>
34 #include <sys/file.h>
35 #include <sys/mman.h>
36 #include <sys/param.h>
37
38 #include <assert.h>
39 #include <ctype.h>
40 #include <dirent.h>
41 #include <err.h>
42 #include <iostream>
43 #include <sstream>
44 #include <stdio.h>
45 #include <string.h>
46 #include <sysexits.h>
47 #include <unistd.h>
48
49 #include "y.tab.h"
50 #include "config.h"
51 #include "configvers.h"
52
53 #ifndef TRUE
54 #define TRUE (1)
55 #endif
56
57 #ifndef FALSE
58 #define FALSE (0)
59 #endif
60
61 #define CDIR "../compile/"
62
63 char *machinename;
64 char *machinearch;
65
66 struct cfgfile_head cfgfiles;
67 struct cputype_head cputype;
68 struct opt_head opt, mkopt, rmopts;
69 struct opt_list_head otab;
70 struct envvar_head envvars;
71 struct hint_head hints;
72 struct includepath_head includepath;
73
74 char * PREFIX;
75 char destdir[MAXPATHLEN];
76 char srcdir[MAXPATHLEN];
77
78 int debugging;
79 int found_defaults;
80 int incignore;
81
82 /*
83 * Preserve old behaviour in INCLUDE_CONFIG_FILE handling (files are included
84 * literally).
85 */
86 int filebased = 0;
87 int versreq;
88
89 static void configfile(void);
90 static void get_srcdir(void);
91 static void usage(void);
92 static void cleanheaders(char *);
93 static void kernconfdump(const char *);
94 static void badversion(void);
95 static void checkversion(void);
96
97 struct hdr_list {
98 const char *h_name;
99 struct hdr_list *h_next;
100 } *htab;
101
102 static std::stringstream line_buf;
103
104 /*
105 * Config builds a set of files for building a UNIX
106 * system given a description of the desired system.
107 */
108 int
main(int argc,char ** argv)109 main(int argc, char **argv)
110 {
111
112 struct stat buf;
113 int ch, len;
114 char *p;
115 char *kernfile;
116 struct includepath* ipath;
117 int printmachine;
118 bool cust_dest = false;
119
120 printmachine = 0;
121 kernfile = NULL;
122 SLIST_INIT(&includepath);
123 SLIST_INIT(&cputype);
124 SLIST_INIT(&mkopt);
125 SLIST_INIT(&opt);
126 SLIST_INIT(&rmopts);
127 STAILQ_INIT(&cfgfiles);
128 STAILQ_INIT(&dtab);
129 STAILQ_INIT(&fntab);
130 STAILQ_INIT(&ftab);
131 STAILQ_INIT(&hints);
132 STAILQ_INIT(&envvars);
133 while ((ch = getopt(argc, argv, "Cd:gI:mps:Vx:")) != -1)
134 switch (ch) {
135 case 'C':
136 filebased = 1;
137 break;
138 case 'd':
139 if (*destdir == '\0')
140 strlcpy(destdir, optarg, sizeof(destdir));
141 else
142 errx(EXIT_FAILURE, "directory already set");
143 cust_dest = true;
144 break;
145 case 'g':
146 debugging++;
147 break;
148 case 'I':
149 ipath = (struct includepath *) \
150 calloc(1, sizeof (struct includepath));
151 if (ipath == NULL)
152 err(EXIT_FAILURE, "calloc");
153 ipath->path = optarg;
154 SLIST_INSERT_HEAD(&includepath, ipath, path_next);
155 break;
156 case 'm':
157 printmachine = 1;
158 break;
159 case 's':
160 if (*srcdir == '\0')
161 strlcpy(srcdir, optarg, sizeof(srcdir));
162 else
163 errx(EXIT_FAILURE, "src directory already set");
164 break;
165 case 'V':
166 printf("%d\n", CONFIGVERS);
167 exit(0);
168 case 'x':
169 kernfile = optarg;
170 break;
171 case '?':
172 default:
173 usage();
174 }
175 argc -= optind;
176 argv += optind;
177
178 if (kernfile != NULL) {
179 kernconfdump(kernfile);
180 exit(EXIT_SUCCESS);
181 }
182
183 if (argc != 1)
184 usage();
185
186 PREFIX = *argv;
187 if (stat(PREFIX, &buf) != 0 || !S_ISREG(buf.st_mode))
188 err(2, "%s", PREFIX);
189 if (freopen("DEFAULTS", "r", stdin) != NULL) {
190 found_defaults = 1;
191 yyfile = "DEFAULTS";
192 } else {
193 if (freopen(PREFIX, "r", stdin) == NULL)
194 err(2, "%s", PREFIX);
195 yyfile = PREFIX;
196 }
197 if (*destdir != '\0') {
198 len = strlen(destdir);
199 while (len > 1 && destdir[len - 1] == '/')
200 destdir[--len] = '\0';
201 if (*srcdir == '\0')
202 get_srcdir();
203 } else {
204 strlcpy(destdir, CDIR, sizeof(destdir));
205 strlcat(destdir, PREFIX, sizeof(destdir));
206 }
207
208 if (yyparse())
209 exit(3);
210
211 /*
212 * Ensure that required elements (machine, cpu, ident) are present.
213 */
214 if (machinename == NULL) {
215 printf("Specify machine type, e.g. ``machine i386''\n");
216 exit(1);
217 }
218 if (ident == NULL) {
219 printf("no ident line specified\n");
220 exit(1);
221 }
222 if (SLIST_EMPTY(&cputype)) {
223 printf("cpu type must be specified\n");
224 exit(1);
225 }
226 checkversion();
227
228 if (printmachine) {
229 printf("%s\t%s\n",machinename,machinearch);
230 exit(0);
231 }
232
233 /*
234 * Make CDIR directory, if doing a default destination. Some version
235 * control systems delete empty directories and this seemlessly copes.
236 */
237 if (!cust_dest && stat(CDIR, &buf))
238 if (mkdir(CDIR, 0777))
239 err(2, "%s", CDIR);
240 /* Create the compile directory */
241 p = path((char *)NULL);
242 if (stat(p, &buf)) {
243 if (mkdir(p, 0777))
244 err(2, "%s", p);
245 } else if (!S_ISDIR(buf.st_mode))
246 errx(EXIT_FAILURE, "%s isn't a directory", p);
247
248 configfile(); /* put config file into kernel*/
249 options(); /* make options .h files */
250 makefile(); /* build Makefile */
251 makeenv(); /* build env.c */
252 makehints(); /* build hints.c */
253 headers(); /* make a lot of .h files */
254 cleanheaders(p);
255 printf("Kernel build directory is %s\n", p);
256 printf("Don't forget to do ``make cleandepend && make depend''\n");
257 exit(0);
258 }
259
260 /*
261 * get_srcdir
262 * determine the root of the kernel source tree
263 * and save that in srcdir.
264 */
265 static void
get_srcdir(void)266 get_srcdir(void)
267 {
268 struct stat lg, phy;
269 char *p, *pwd;
270 int i;
271
272 if (realpath("../..", srcdir) == NULL)
273 err(EXIT_FAILURE, "Unable to find root of source tree");
274 if ((pwd = getenv("PWD")) != NULL && *pwd == '/' &&
275 (pwd = strdup(pwd)) != NULL) {
276 /* Remove the last two path components. */
277 for (i = 0; i < 2; i++) {
278 if ((p = strrchr(pwd, '/')) == NULL) {
279 free(pwd);
280 return;
281 }
282 *p = '\0';
283 }
284 if (stat(pwd, &lg) != -1 && stat(srcdir, &phy) != -1 &&
285 lg.st_dev == phy.st_dev && lg.st_ino == phy.st_ino)
286 strlcpy(srcdir, pwd, MAXPATHLEN);
287 free(pwd);
288 }
289 }
290
291 static void
usage(void)292 usage(void)
293 {
294
295 fprintf(stderr,
296 "usage: config [-CgmpV] [-d destdir] [-s srcdir] sysname\n");
297 fprintf(stderr, " config -x kernel\n");
298 exit(EX_USAGE);
299 }
300
301 static void
init_line_buf(void)302 init_line_buf(void)
303 {
304
305 line_buf.str("");
306 }
307
308 static std::string
get_line_buf(void)309 get_line_buf(void)
310 {
311
312 line_buf.flush();
313 if (!line_buf.good()) {
314 errx(EXIT_FAILURE, "failed to generate line buffer, "
315 "partial line = %s", line_buf.str().c_str());
316 }
317
318 return line_buf.str();
319 }
320
321 /*
322 * get_word
323 * returns EOF on end of file
324 * NULL on end of line
325 * pointer to the word otherwise
326 */
327 configword
get_word(FILE * fp)328 get_word(FILE *fp)
329 {
330 int ch;
331 int escaped_nl = 0;
332
333 init_line_buf();
334 begin:
335 while ((ch = getc(fp)) != EOF)
336 if (ch != ' ' && ch != '\t')
337 break;
338 if (ch == EOF)
339 return (configword().eof(true));
340 if (ch == '\\'){
341 escaped_nl = 1;
342 goto begin;
343 }
344 if (ch == '\n') {
345 if (escaped_nl){
346 escaped_nl = 0;
347 goto begin;
348 }
349 else
350 return (configword().eol(true));
351 }
352 line_buf << (char)ch;
353 /* Negation operator is a word by itself. */
354 if (ch == '!') {
355 return (configword(get_line_buf()));
356 }
357 while ((ch = getc(fp)) != EOF) {
358 if (isspace(ch))
359 break;
360 line_buf << (char)ch;
361 }
362 if (ch == EOF)
363 return (configword().eof(true));
364 (void) ungetc(ch, fp);
365 return (configword(get_line_buf()));
366 }
367
368 /*
369 * get_quoted_word
370 * like get_word but will accept something in double or single quotes
371 * (to allow embedded spaces).
372 */
373 configword
get_quoted_word(FILE * fp)374 get_quoted_word(FILE *fp)
375 {
376 int ch;
377 int escaped_nl = 0;
378
379 init_line_buf();
380 begin:
381 while ((ch = getc(fp)) != EOF)
382 if (ch != ' ' && ch != '\t')
383 break;
384 if (ch == EOF)
385 return (configword().eof(true));
386 if (ch == '\\'){
387 escaped_nl = 1;
388 goto begin;
389 }
390 if (ch == '\n') {
391 if (escaped_nl){
392 escaped_nl = 0;
393 goto begin;
394 }
395 else
396 return (configword().eol(true));
397 }
398 if (ch == '"' || ch == '\'') {
399 int quote = ch;
400
401 escaped_nl = 0;
402 while ((ch = getc(fp)) != EOF) {
403 if (ch == quote && !escaped_nl)
404 break;
405 if (ch == '\n' && !escaped_nl) {
406 printf("config: missing quote reading `%s'\n",
407 get_line_buf().c_str());
408 exit(2);
409 }
410 if (ch == '\\' && !escaped_nl) {
411 escaped_nl = 1;
412 continue;
413 }
414 if (ch != quote && escaped_nl)
415 line_buf << "\\";
416 line_buf << (char)ch;
417 escaped_nl = 0;
418 }
419 } else {
420 line_buf << (char)ch;
421 while ((ch = getc(fp)) != EOF) {
422 if (isspace(ch))
423 break;
424 line_buf << (char)ch;
425 }
426 if (ch != EOF)
427 (void) ungetc(ch, fp);
428 }
429 if (ch == EOF)
430 return (configword().eof(true));
431 return (configword(get_line_buf()));
432 }
433
434 /*
435 * prepend the path to a filename
436 */
437 char *
path(const char * file)438 path(const char *file)
439 {
440 char *cp = NULL;
441
442 if (file)
443 asprintf(&cp, "%s/%s", destdir, file);
444 else
445 cp = strdup(destdir);
446 if (cp == NULL)
447 err(EXIT_FAILURE, "malloc");
448 return (cp);
449 }
450
451 /*
452 * Generate configuration file based on actual settings. With this mode, user
453 * will be able to obtain and build conifguration file with one command.
454 */
455 static void
configfile_dynamic(std::ostringstream & cfg)456 configfile_dynamic(std::ostringstream &cfg)
457 {
458 struct cputype *cput;
459 struct device *d;
460 struct opt *ol;
461 char *lend;
462 unsigned int i;
463
464 asprintf(&lend, "\\n\\\n");
465 assert(lend != NULL);
466 cfg << "options\t" << OPT_AUTOGEN << lend;
467 cfg << "ident\t" << ident << lend;
468 cfg << "machine\t" << machinename << lend;
469 SLIST_FOREACH(cput, &cputype, cpu_next)
470 cfg << "cpu\t" << cput->cpu_name << lend;
471 SLIST_FOREACH(ol, &mkopt, op_next)
472 cfg << "makeoptions\t" << ol->op_name << '=' <<
473 ol->op_value << lend;
474 SLIST_FOREACH(ol, &opt, op_next) {
475 if (strncmp(ol->op_name, "DEV_", 4) == 0)
476 continue;
477 cfg << "options\t" << ol->op_name;
478 if (ol->op_value != NULL) {
479 cfg << '=';
480 for (i = 0; i < strlen(ol->op_value); i++) {
481 if (ol->op_value[i] == '"')
482 cfg << '\\' << ol->op_value[i];
483 else
484 cfg << ol->op_value[i];
485 }
486 }
487
488 cfg << lend;
489 }
490 /*
491 * Mark this file as containing everything we need.
492 */
493 STAILQ_FOREACH(d, &dtab, d_next)
494 cfg << "device\t" << d->d_name << lend;
495 free(lend);
496 }
497
498 /*
499 * Generate file from the configuration files.
500 */
501 static void
configfile_filebased(std::ostringstream & cfg)502 configfile_filebased(std::ostringstream &cfg)
503 {
504 FILE *cff;
505 struct cfgfile *cf;
506 int i;
507
508 /*
509 * Try to read all configuration files. Since those will be present as
510 * C string in the macro, we have to slash their ends then the line
511 * wraps.
512 */
513 STAILQ_FOREACH(cf, &cfgfiles, cfg_next) {
514 cff = fopen(cf->cfg_path, "r");
515 if (cff == NULL) {
516 warn("Couldn't open file %s", cf->cfg_path);
517 continue;
518 }
519 while ((i = getc(cff)) != EOF) {
520 if (i == '\n')
521 cfg << "\\n\\\n";
522 else if (i == '"' || i == '\'')
523 cfg << '\\' << i;
524 else
525 cfg << i;
526 }
527 fclose(cff);
528 }
529 }
530
531 static void
configfile(void)532 configfile(void)
533 {
534 FILE *fo;
535 std::ostringstream cfg;
536 char *p;
537
538 /* Add main configuration file to the list of files to be included */
539 cfgfile_add(PREFIX);
540 p = path("config.c.new");
541 fo = fopen(p, "w");
542 if (!fo)
543 err(2, "%s", p);
544 free(p);
545
546 if (filebased) {
547 /* Is needed, can be used for backward compatibility. */
548 configfile_filebased(cfg);
549 } else {
550 configfile_dynamic(cfg);
551 }
552
553 cfg.flush();
554 /*
555 * We print first part of the template, replace our tag with
556 * configuration files content and later continue writing our
557 * template.
558 */
559 p = strstr(kernconfstr, KERNCONFTAG);
560 if (p == NULL)
561 errx(EXIT_FAILURE, "Something went terribly wrong!");
562 *p = '\0';
563 fprintf(fo, "%s", kernconfstr);
564 fprintf(fo, "%s", cfg.str().c_str());
565 p += strlen(KERNCONFTAG);
566 fprintf(fo, "%s", p);
567 fclose(fo);
568 moveifchanged("config.c.new", "config.c");
569 cfgfile_removeall();
570 }
571
572 /*
573 * moveifchanged --
574 * compare two files; rename if changed.
575 */
576 void
moveifchanged(const char * from_name,const char * to_name)577 moveifchanged(const char *from_name, const char *to_name)
578 {
579 char *p, *q;
580 char *from_path, *to_path;
581 int changed;
582 size_t tsize;
583 struct stat from_sb, to_sb;
584 int from_fd, to_fd;
585
586 changed = 0;
587
588 from_path = path(from_name);
589 to_path = path(to_name);
590 if ((from_fd = open(from_path, O_RDONLY)) < 0)
591 err(EX_OSERR, "moveifchanged open(%s)", from_name);
592
593 if ((to_fd = open(to_path, O_RDONLY)) < 0)
594 changed++;
595
596 if (!changed && fstat(from_fd, &from_sb) < 0)
597 err(EX_OSERR, "moveifchanged fstat(%s)", from_path);
598
599 if (!changed && fstat(to_fd, &to_sb) < 0)
600 err(EX_OSERR, "moveifchanged fstat(%s)", to_path);
601
602 if (!changed && from_sb.st_size != to_sb.st_size)
603 changed++;
604
605 if (!changed) {
606 tsize = (size_t)from_sb.st_size;
607
608 p = (char *)mmap(NULL, tsize, PROT_READ, MAP_SHARED, from_fd,
609 (off_t)0);
610 if (p == MAP_FAILED)
611 err(EX_OSERR, "mmap %s", from_path);
612 q = (char *)mmap(NULL, tsize, PROT_READ, MAP_SHARED, to_fd,
613 (off_t)0);
614 if (q == MAP_FAILED)
615 err(EX_OSERR, "mmap %s", to_path);
616
617 changed = memcmp(p, q, tsize);
618 munmap(p, tsize);
619 munmap(q, tsize);
620 }
621
622 if (changed) {
623 if (rename(from_path, to_path) < 0)
624 err(EX_OSERR, "rename(%s, %s)", from_path, to_path);
625 } else {
626 if (unlink(from_path) < 0)
627 err(EX_OSERR, "unlink(%s)", from_path);
628 }
629
630 close(from_fd);
631 if (to_fd >= 0)
632 close(to_fd);
633
634 free(from_path);
635 free(to_path);
636 }
637
638 static void
cleanheaders(char * p)639 cleanheaders(char *p)
640 {
641 DIR *dirp;
642 struct dirent *dp;
643 struct file_list *fl;
644 struct hdr_list *hl;
645 size_t len;
646
647 remember("y.tab.h");
648 remember("setdefs.h");
649 STAILQ_FOREACH(fl, &ftab, f_next)
650 remember(fl->f_fn);
651
652 /*
653 * Scan the build directory and clean out stuff that looks like
654 * it might have been a leftover NFOO header, etc.
655 */
656 if ((dirp = opendir(p)) == NULL)
657 err(EX_OSERR, "opendir %s", p);
658 while ((dp = readdir(dirp)) != NULL) {
659 len = strlen(dp->d_name);
660 /* Skip non-headers */
661 if (len < 2 || dp->d_name[len - 2] != '.' ||
662 dp->d_name[len - 1] != 'h')
663 continue;
664 /* Skip special stuff, eg: bus_if.h, but check opt_*.h */
665 if (strchr(dp->d_name, '_') &&
666 strncmp(dp->d_name, "opt_", 4) != 0)
667 continue;
668 /* Check if it is a target file */
669 for (hl = htab; hl != NULL; hl = hl->h_next) {
670 if (eq(dp->d_name, hl->h_name)) {
671 break;
672 }
673 }
674 if (hl)
675 continue;
676 printf("Removing stale header: %s\n", dp->d_name);
677 p = path(dp->d_name);
678 if (unlink(p) == -1)
679 warn("unlink %s", dp->d_name);
680 free(p);
681 }
682 (void)closedir(dirp);
683 }
684
685 void
remember(const char * file)686 remember(const char *file)
687 {
688 const char *s;
689 struct hdr_list *hl;
690
691 if ((s = strrchr(file, '/')) != NULL)
692 s = ns(s + 1);
693 else
694 s = ns(file);
695
696 if (strchr(s, '_') && strncmp(s, "opt_", 4) != 0) {
697 free(__DECONST(char *, s));
698 return;
699 }
700 for (hl = htab; hl != NULL; hl = hl->h_next) {
701 if (eq(s, hl->h_name)) {
702 free(__DECONST(char *, s));
703 return;
704 }
705 }
706 hl = (struct hdr_list *)calloc(1, sizeof(*hl));
707 if (hl == NULL)
708 err(EXIT_FAILURE, "calloc");
709 hl->h_name = s;
710 hl->h_next = htab;
711 htab = hl;
712 }
713
714 /*
715 * This one is quick hack. Will be probably moved to elf(3) interface.
716 * It takes kernel configuration file name, passes it as an argument to
717 * elfdump -a, which output is parsed by some UNIX tools...
718 */
719 static void
kernconfdump(const char * file)720 kernconfdump(const char *file)
721 {
722 struct stat st;
723 FILE *fp, *pp;
724 int error, osz, r;
725 size_t i, off, size, t1, t2, align;
726 char *cmd, *o;
727
728 r = open(file, O_RDONLY);
729 if (r == -1)
730 err(EXIT_FAILURE, "Couldn't open file '%s'", file);
731 error = fstat(r, &st);
732 if (error == -1)
733 err(EXIT_FAILURE, "fstat() failed");
734 if (S_ISDIR(st.st_mode))
735 errx(EXIT_FAILURE, "'%s' is a directory", file);
736 fp = fdopen(r, "r");
737 if (fp == NULL)
738 err(EXIT_FAILURE, "fdopen() failed");
739 osz = 1024;
740 o = (char *)calloc(1, osz);
741 if (o == NULL)
742 err(EXIT_FAILURE, "Couldn't allocate memory");
743 /* ELF note section header. */
744 asprintf(&cmd, "/usr/bin/elfdump -c %s | grep -A 8 kern_conf"
745 "| tail -5 | cut -d ' ' -f 2 | paste - - - - -", file);
746 if (cmd == NULL)
747 errx(EXIT_FAILURE, "asprintf() failed");
748 pp = popen(cmd, "r");
749 if (pp == NULL)
750 errx(EXIT_FAILURE, "popen() failed");
751 free(cmd);
752 (void)fread(o, osz, 1, pp);
753 pclose(pp);
754 r = sscanf(o, "%zu%zu%zu%zu%zu", &off, &size, &t1, &t2, &align);
755 free(o);
756 if (size > SIZE_MAX - off || off + size > (size_t)st.st_size)
757 errx(EXIT_FAILURE, "%s: incoherent ELF headers", file);
758 if (r != 5)
759 errx(EXIT_FAILURE, "File %s doesn't contain configuration "
760 "file. Either unsupported, or not compiled with "
761 "INCLUDE_CONFIG_FILE", file);
762 r = fseek(fp, off, SEEK_CUR);
763 if (r != 0)
764 err(EXIT_FAILURE, "fseek() failed");
765 for (i = 0; i < size; i++) {
766 r = fgetc(fp);
767 if (r == EOF)
768 break;
769 if (r == '\0') {
770 assert(i == size - 1 &&
771 ("\\0 found in the middle of a file"));
772 break;
773 }
774 fputc(r, stdout);
775 }
776 fclose(fp);
777 }
778
779 static void
badversion(void)780 badversion(void)
781 {
782 fprintf(stderr, "ERROR: version of config(8) does not match kernel!\n");
783 fprintf(stderr, "config version = %d, ", CONFIGVERS);
784 fprintf(stderr, "version required = %d\n\n", versreq);
785 fprintf(stderr, "Make sure that /usr/src/usr.sbin/config is in sync\n");
786 fprintf(stderr, "with your /usr/src/sys and install a new config binary\n");
787 fprintf(stderr, "before trying this again.\n\n");
788 fprintf(stderr, "If running the new config fails check your config\n");
789 fprintf(stderr, "file against the GENERIC or LINT config files for\n");
790 fprintf(stderr, "changes in config syntax, or option/device naming\n");
791 fprintf(stderr, "conventions\n\n");
792 exit(1);
793 }
794
795 static void
checkversion(void)796 checkversion(void)
797 {
798 FILE *ifp;
799 char line[BUFSIZ];
800
801 ifp = open_makefile_template();
802 while (fgets(line, BUFSIZ, ifp) != 0) {
803 if (*line != '%')
804 continue;
805 if (strncmp(line, "%VERSREQ=", 9) != 0)
806 continue;
807 versreq = atoi(line + 9);
808 if (MAJOR_VERS(versreq) == MAJOR_VERS(CONFIGVERS) &&
809 versreq <= CONFIGVERS)
810 continue;
811 badversion();
812 }
813 fclose(ifp);
814 }
815