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 int verbose;
82
83 /*
84 * Preserve old behaviour in INCLUDE_CONFIG_FILE handling (files are included
85 * literally).
86 */
87 int filebased = 0;
88 int versreq;
89
90 static void configfile(void);
91 static void get_srcdir(void);
92 static void usage(void);
93 static void cleanheaders(char *);
94 static void kernconfdump(const char *);
95 static void badversion(void);
96 static void checkversion(void);
97
98 struct hdr_list {
99 const char *h_name;
100 struct hdr_list *h_next;
101 } *htab;
102
103 static std::stringstream line_buf;
104
105 /*
106 * Config builds a set of files for building a UNIX
107 * system given a description of the desired system.
108 */
109 int
main(int argc,char ** argv)110 main(int argc, char **argv)
111 {
112
113 struct stat buf;
114 int ch, len;
115 char *p;
116 char *kernfile;
117 struct includepath* ipath;
118 int printmachine;
119 bool cust_dest = false;
120
121 printmachine = 0;
122 kernfile = NULL;
123 SLIST_INIT(&includepath);
124 SLIST_INIT(&cputype);
125 SLIST_INIT(&mkopt);
126 SLIST_INIT(&opt);
127 SLIST_INIT(&rmopts);
128 STAILQ_INIT(&cfgfiles);
129 STAILQ_INIT(&dtab);
130 STAILQ_INIT(&fntab);
131 STAILQ_INIT(&ftab);
132 STAILQ_INIT(&hints);
133 STAILQ_INIT(&envvars);
134 STAILQ_INIT(&optfntab);
135 while ((ch = getopt(argc, argv, "Cd:gI:mps:Vvx:")) != -1)
136 switch (ch) {
137 case 'C':
138 filebased = 1;
139 break;
140 case 'd':
141 if (*destdir == '\0')
142 strlcpy(destdir, optarg, sizeof(destdir));
143 else
144 errx(EXIT_FAILURE, "directory already set");
145 cust_dest = true;
146 break;
147 case 'g':
148 debugging++;
149 break;
150 case 'I':
151 ipath = (struct includepath *) \
152 calloc(1, sizeof (struct includepath));
153 if (ipath == NULL)
154 err(EXIT_FAILURE, "calloc");
155 ipath->path = optarg;
156 SLIST_INSERT_HEAD(&includepath, ipath, path_next);
157 break;
158 case 'm':
159 printmachine = 1;
160 break;
161 case 's':
162 if (*srcdir == '\0')
163 strlcpy(srcdir, optarg, sizeof(srcdir));
164 else
165 errx(EXIT_FAILURE, "src directory already set");
166 break;
167 case 'V':
168 printf("%d\n", CONFIGVERS);
169 exit(0);
170 case 'v':
171 verbose++;
172 break;
173 case 'x':
174 kernfile = optarg;
175 break;
176 case '?':
177 default:
178 usage();
179 }
180 argc -= optind;
181 argv += optind;
182
183 if (kernfile != NULL) {
184 kernconfdump(kernfile);
185 exit(EXIT_SUCCESS);
186 }
187
188 if (argc != 1)
189 usage();
190
191 PREFIX = *argv;
192 if (stat(PREFIX, &buf) != 0 || !S_ISREG(buf.st_mode))
193 err(2, "%s", PREFIX);
194 if (freopen("DEFAULTS", "r", stdin) != NULL) {
195 found_defaults = 1;
196 yyfile = "DEFAULTS";
197 } else {
198 if (freopen(PREFIX, "r", stdin) == NULL)
199 err(2, "%s", PREFIX);
200 yyfile = PREFIX;
201 }
202 if (*destdir != '\0') {
203 len = strlen(destdir);
204 while (len > 1 && destdir[len - 1] == '/')
205 destdir[--len] = '\0';
206 if (*srcdir == '\0')
207 get_srcdir();
208 } else {
209 strlcpy(destdir, CDIR, sizeof(destdir));
210 strlcat(destdir, PREFIX, sizeof(destdir));
211 }
212
213 if (yyparse())
214 exit(3);
215
216 /*
217 * Ensure that required elements (machine, cpu, ident) are present.
218 */
219 if (machinename == NULL) {
220 printf("Specify machine type, e.g. ``machine i386''\n");
221 exit(1);
222 }
223 if (ident == NULL) {
224 printf("no ident line specified\n");
225 exit(1);
226 }
227 if (SLIST_EMPTY(&cputype)) {
228 printf("cpu type must be specified\n");
229 exit(1);
230 }
231 checkversion();
232
233 if (printmachine) {
234 printf("%s\t%s\n",machinename,machinearch);
235 exit(0);
236 }
237
238 /*
239 * Make CDIR directory, if doing a default destination. Some version
240 * control systems delete empty directories and this seemlessly copes.
241 */
242 if (!cust_dest && stat(CDIR, &buf))
243 if (mkdir(CDIR, 0777))
244 err(2, "%s", CDIR);
245 /* Create the compile directory */
246 p = path((char *)NULL);
247 if (stat(p, &buf)) {
248 if (mkdir(p, 0777))
249 err(2, "%s", p);
250 } else if (!S_ISDIR(buf.st_mode))
251 errx(EXIT_FAILURE, "%s isn't a directory", p);
252
253 configfile(); /* put config file into kernel*/
254 options(); /* make options .h files */
255 makefile(); /* build Makefile */
256 makeenv(); /* build env.c */
257 makehints(); /* build hints.c */
258 headers(); /* make a lot of .h files */
259 cleanheaders(p);
260 printf("Kernel build directory is %s\n", p);
261 printf("Don't forget to do ``make cleandepend && make depend''\n");
262 exit(0);
263 }
264
265 /*
266 * get_srcdir
267 * determine the root of the kernel source tree
268 * and save that in srcdir.
269 */
270 static void
get_srcdir(void)271 get_srcdir(void)
272 {
273 struct stat lg, phy;
274 char *p, *pwd;
275 int i;
276
277 if (realpath("../..", srcdir) == NULL)
278 err(EXIT_FAILURE, "Unable to find root of source tree");
279 if ((pwd = getenv("PWD")) != NULL && *pwd == '/' &&
280 (pwd = strdup(pwd)) != NULL) {
281 /* Remove the last two path components. */
282 for (i = 0; i < 2; i++) {
283 if ((p = strrchr(pwd, '/')) == NULL) {
284 free(pwd);
285 return;
286 }
287 *p = '\0';
288 }
289 if (stat(pwd, &lg) != -1 && stat(srcdir, &phy) != -1 &&
290 lg.st_dev == phy.st_dev && lg.st_ino == phy.st_ino)
291 strlcpy(srcdir, pwd, MAXPATHLEN);
292 free(pwd);
293 }
294 }
295
296 static void
usage(void)297 usage(void)
298 {
299
300 fprintf(stderr,
301 "usage: config [-CgmpV] [-d destdir] [-s srcdir] sysname\n");
302 fprintf(stderr, " config -x kernel\n");
303 exit(EX_USAGE);
304 }
305
306 static void
init_line_buf(void)307 init_line_buf(void)
308 {
309
310 line_buf.str("");
311 }
312
313 static std::string
get_line_buf(void)314 get_line_buf(void)
315 {
316
317 line_buf.flush();
318 if (!line_buf.good()) {
319 errx(EXIT_FAILURE, "failed to generate line buffer, "
320 "partial line = %s", line_buf.str().c_str());
321 }
322
323 return line_buf.str();
324 }
325
326 /*
327 * get_word
328 * returns EOF on end of file
329 * NULL on end of line
330 * pointer to the word otherwise
331 */
332 configword
get_word(FILE * fp)333 get_word(FILE *fp)
334 {
335 int ch;
336 int escaped_nl = 0;
337
338 init_line_buf();
339 begin:
340 while ((ch = getc(fp)) != EOF)
341 if (ch != ' ' && ch != '\t')
342 break;
343 if (ch == EOF)
344 return (configword().eof(true));
345 if (ch == '\\'){
346 escaped_nl = 1;
347 goto begin;
348 }
349 if (ch == '\n') {
350 if (escaped_nl){
351 escaped_nl = 0;
352 goto begin;
353 }
354 else
355 return (configword().eol(true));
356 }
357 line_buf << (char)ch;
358 /* Negation operator is a word by itself. */
359 if (ch == '!') {
360 return (configword(get_line_buf()));
361 }
362 while ((ch = getc(fp)) != EOF) {
363 if (isspace(ch))
364 break;
365 line_buf << (char)ch;
366 }
367 if (ch == EOF)
368 return (configword().eof(true));
369 (void) ungetc(ch, fp);
370 return (configword(get_line_buf()));
371 }
372
373 /*
374 * get_quoted_word
375 * like get_word but will accept something in double or single quotes
376 * (to allow embedded spaces).
377 */
378 configword
get_quoted_word(FILE * fp)379 get_quoted_word(FILE *fp)
380 {
381 int ch;
382 int escaped_nl = 0;
383
384 init_line_buf();
385 begin:
386 while ((ch = getc(fp)) != EOF)
387 if (ch != ' ' && ch != '\t')
388 break;
389 if (ch == EOF)
390 return (configword().eof(true));
391 if (ch == '\\'){
392 escaped_nl = 1;
393 goto begin;
394 }
395 if (ch == '\n') {
396 if (escaped_nl){
397 escaped_nl = 0;
398 goto begin;
399 }
400 else
401 return (configword().eol(true));
402 }
403 if (ch == '"' || ch == '\'') {
404 int quote = ch;
405
406 escaped_nl = 0;
407 while ((ch = getc(fp)) != EOF) {
408 if (ch == quote && !escaped_nl)
409 break;
410 if (ch == '\n' && !escaped_nl) {
411 printf("config: missing quote reading `%s'\n",
412 get_line_buf().c_str());
413 exit(2);
414 }
415 if (ch == '\\' && !escaped_nl) {
416 escaped_nl = 1;
417 continue;
418 }
419 if (ch != quote && escaped_nl)
420 line_buf << "\\";
421 line_buf << (char)ch;
422 escaped_nl = 0;
423 }
424 } else {
425 line_buf << (char)ch;
426 while ((ch = getc(fp)) != EOF) {
427 if (isspace(ch))
428 break;
429 line_buf << (char)ch;
430 }
431 if (ch != EOF)
432 (void) ungetc(ch, fp);
433 }
434 if (ch == EOF)
435 return (configword().eof(true));
436 return (configword(get_line_buf()));
437 }
438
439 /*
440 * prepend the path to a filename
441 */
442 char *
path(const char * file)443 path(const char *file)
444 {
445 char *cp = NULL;
446
447 if (file)
448 asprintf(&cp, "%s/%s", destdir, file);
449 else
450 cp = strdup(destdir);
451 if (cp == NULL)
452 err(EXIT_FAILURE, "malloc");
453 return (cp);
454 }
455
456 /*
457 * Generate configuration file based on actual settings. With this mode, user
458 * will be able to obtain and build conifguration file with one command.
459 */
460 static void
configfile_dynamic(std::ostringstream & cfg)461 configfile_dynamic(std::ostringstream &cfg)
462 {
463 struct cputype *cput;
464 struct device *d;
465 struct opt *ol;
466 char *lend;
467 unsigned int i;
468
469 asprintf(&lend, "\\n\\\n");
470 assert(lend != NULL);
471 cfg << "options\t" << OPT_AUTOGEN << lend;
472 cfg << "ident\t" << ident << lend;
473 cfg << "machine\t" << machinename << lend;
474 SLIST_FOREACH(cput, &cputype, cpu_next)
475 cfg << "cpu\t" << cput->cpu_name << lend;
476 SLIST_FOREACH(ol, &mkopt, op_next)
477 cfg << "makeoptions\t" << ol->op_name << '=' <<
478 ol->op_value << lend;
479 SLIST_FOREACH(ol, &opt, op_next) {
480 if (strncmp(ol->op_name, "DEV_", 4) == 0)
481 continue;
482 cfg << "options\t" << ol->op_name;
483 if (ol->op_value != NULL) {
484 cfg << '=';
485 for (i = 0; i < strlen(ol->op_value); i++) {
486 if (ol->op_value[i] == '"')
487 cfg << '\\' << ol->op_value[i];
488 else
489 cfg << ol->op_value[i];
490 }
491 }
492
493 cfg << lend;
494 }
495 /*
496 * Mark this file as containing everything we need.
497 */
498 STAILQ_FOREACH(d, &dtab, d_next)
499 cfg << "device\t" << d->d_name << lend;
500 free(lend);
501 }
502
503 /*
504 * Generate file from the configuration files.
505 */
506 static void
configfile_filebased(std::ostringstream & cfg)507 configfile_filebased(std::ostringstream &cfg)
508 {
509 FILE *cff;
510 struct cfgfile *cf;
511 int i;
512
513 /*
514 * Try to read all configuration files. Since those will be present as
515 * C string in the macro, we have to slash their ends then the line
516 * wraps.
517 */
518 STAILQ_FOREACH(cf, &cfgfiles, cfg_next) {
519 cff = fopen(cf->cfg_path, "r");
520 if (cff == NULL) {
521 warn("Couldn't open file %s", cf->cfg_path);
522 continue;
523 }
524 while ((i = getc(cff)) != EOF) {
525 if (i == '\n')
526 cfg << "\\n\\\n";
527 else if (i == '"' || i == '\'')
528 cfg << '\\' << i;
529 else
530 cfg << i;
531 }
532 fclose(cff);
533 }
534 }
535
536 static void
configfile(void)537 configfile(void)
538 {
539 FILE *fo;
540 std::ostringstream cfg;
541 char *p;
542
543 /* Add main configuration file to the list of files to be included */
544 cfgfile_add(PREFIX);
545 p = path("config.c.new");
546 fo = fopen(p, "w");
547 if (!fo)
548 err(2, "%s", p);
549 free(p);
550
551 if (filebased) {
552 /* Is needed, can be used for backward compatibility. */
553 configfile_filebased(cfg);
554 } else {
555 configfile_dynamic(cfg);
556 }
557
558 cfg.flush();
559 /*
560 * We print first part of the template, replace our tag with
561 * configuration files content and later continue writing our
562 * template.
563 */
564 p = strstr(kernconfstr, KERNCONFTAG);
565 if (p == NULL)
566 errx(EXIT_FAILURE, "Something went terribly wrong!");
567 *p = '\0';
568 fprintf(fo, "%s", kernconfstr);
569 fprintf(fo, "%s", cfg.str().c_str());
570 p += strlen(KERNCONFTAG);
571 fprintf(fo, "%s", p);
572 fclose(fo);
573 moveifchanged("config.c.new", "config.c");
574 cfgfile_removeall();
575 }
576
577 /*
578 * moveifchanged --
579 * compare two files; rename if changed.
580 */
581 void
moveifchanged(const char * from_name,const char * to_name)582 moveifchanged(const char *from_name, const char *to_name)
583 {
584 char *p, *q;
585 char *from_path, *to_path;
586 int changed;
587 size_t tsize;
588 struct stat from_sb, to_sb;
589 int from_fd, to_fd;
590
591 changed = 0;
592
593 from_path = path(from_name);
594 to_path = path(to_name);
595 if ((from_fd = open(from_path, O_RDONLY)) < 0)
596 err(EX_OSERR, "moveifchanged open(%s)", from_name);
597
598 if ((to_fd = open(to_path, O_RDONLY)) < 0)
599 changed++;
600
601 if (!changed && fstat(from_fd, &from_sb) < 0)
602 err(EX_OSERR, "moveifchanged fstat(%s)", from_path);
603
604 if (!changed && fstat(to_fd, &to_sb) < 0)
605 err(EX_OSERR, "moveifchanged fstat(%s)", to_path);
606
607 if (!changed && from_sb.st_size != to_sb.st_size)
608 changed++;
609
610 if (!changed) {
611 tsize = (size_t)from_sb.st_size;
612
613 p = (char *)mmap(NULL, tsize, PROT_READ, MAP_SHARED, from_fd,
614 (off_t)0);
615 if (p == MAP_FAILED)
616 err(EX_OSERR, "mmap %s", from_path);
617 q = (char *)mmap(NULL, tsize, PROT_READ, MAP_SHARED, to_fd,
618 (off_t)0);
619 if (q == MAP_FAILED)
620 err(EX_OSERR, "mmap %s", to_path);
621
622 changed = memcmp(p, q, tsize);
623 munmap(p, tsize);
624 munmap(q, tsize);
625 }
626
627 if (changed) {
628 if (rename(from_path, to_path) < 0)
629 err(EX_OSERR, "rename(%s, %s)", from_path, to_path);
630 } else {
631 if (unlink(from_path) < 0)
632 err(EX_OSERR, "unlink(%s)", from_path);
633 }
634
635 close(from_fd);
636 if (to_fd >= 0)
637 close(to_fd);
638
639 free(from_path);
640 free(to_path);
641 }
642
643 static void
cleanheaders(char * p)644 cleanheaders(char *p)
645 {
646 DIR *dirp;
647 struct dirent *dp;
648 struct file_list *fl;
649 struct hdr_list *hl;
650 size_t len;
651
652 remember("y.tab.h");
653 remember("setdefs.h");
654 STAILQ_FOREACH(fl, &ftab, f_next)
655 remember(fl->f_fn);
656
657 /*
658 * Scan the build directory and clean out stuff that looks like
659 * it might have been a leftover NFOO header, etc.
660 */
661 if ((dirp = opendir(p)) == NULL)
662 err(EX_OSERR, "opendir %s", p);
663 while ((dp = readdir(dirp)) != NULL) {
664 len = strlen(dp->d_name);
665 /* Skip non-headers */
666 if (len < 2 || dp->d_name[len - 2] != '.' ||
667 dp->d_name[len - 1] != 'h')
668 continue;
669 /* Skip special stuff, eg: bus_if.h, but check opt_*.h */
670 if (strchr(dp->d_name, '_') &&
671 strncmp(dp->d_name, "opt_", 4) != 0)
672 continue;
673 /* Check if it is a target file */
674 for (hl = htab; hl != NULL; hl = hl->h_next) {
675 if (eq(dp->d_name, hl->h_name)) {
676 break;
677 }
678 }
679 if (hl)
680 continue;
681 printf("Removing stale header: %s\n", dp->d_name);
682 p = path(dp->d_name);
683 if (unlink(p) == -1)
684 warn("unlink %s", dp->d_name);
685 free(p);
686 }
687 (void)closedir(dirp);
688 }
689
690 void
remember(const char * file)691 remember(const char *file)
692 {
693 const char *s;
694 struct hdr_list *hl;
695
696 if ((s = strrchr(file, '/')) != NULL)
697 s = ns(s + 1);
698 else
699 s = ns(file);
700
701 if (strchr(s, '_') && strncmp(s, "opt_", 4) != 0) {
702 free(__DECONST(char *, s));
703 return;
704 }
705 for (hl = htab; hl != NULL; hl = hl->h_next) {
706 if (eq(s, hl->h_name)) {
707 free(__DECONST(char *, s));
708 return;
709 }
710 }
711 hl = (struct hdr_list *)calloc(1, sizeof(*hl));
712 if (hl == NULL)
713 err(EXIT_FAILURE, "calloc");
714 hl->h_name = s;
715 hl->h_next = htab;
716 htab = hl;
717 }
718
719 /*
720 * This one is quick hack. Will be probably moved to elf(3) interface.
721 * It takes kernel configuration file name, passes it as an argument to
722 * elfdump -a, which output is parsed by some UNIX tools...
723 */
724 static void
kernconfdump(const char * file)725 kernconfdump(const char *file)
726 {
727 struct stat st;
728 FILE *fp, *pp;
729 int error, osz, r;
730 size_t i, off, size, t1, t2, align;
731 char *cmd, *o;
732
733 r = open(file, O_RDONLY);
734 if (r == -1)
735 err(EXIT_FAILURE, "Couldn't open file '%s'", file);
736 error = fstat(r, &st);
737 if (error == -1)
738 err(EXIT_FAILURE, "fstat() failed");
739 if (S_ISDIR(st.st_mode))
740 errx(EXIT_FAILURE, "'%s' is a directory", file);
741 fp = fdopen(r, "r");
742 if (fp == NULL)
743 err(EXIT_FAILURE, "fdopen() failed");
744 osz = 1024;
745 o = (char *)calloc(1, osz);
746 if (o == NULL)
747 err(EXIT_FAILURE, "Couldn't allocate memory");
748 /* ELF note section header. */
749 asprintf(&cmd, "/usr/bin/elfdump -c %s | grep -A 8 kern_conf"
750 "| tail -5 | cut -d ' ' -f 2 | paste - - - - -", file);
751 if (cmd == NULL)
752 errx(EXIT_FAILURE, "asprintf() failed");
753 pp = popen(cmd, "r");
754 if (pp == NULL)
755 errx(EXIT_FAILURE, "popen() failed");
756 free(cmd);
757 (void)fread(o, osz, 1, pp);
758 pclose(pp);
759 r = sscanf(o, "%zu%zu%zu%zu%zu", &off, &size, &t1, &t2, &align);
760 free(o);
761 if (size > SIZE_MAX - off || off + size > (size_t)st.st_size)
762 errx(EXIT_FAILURE, "%s: incoherent ELF headers", file);
763 if (r != 5)
764 errx(EXIT_FAILURE, "File %s doesn't contain configuration "
765 "file. Either unsupported, or not compiled with "
766 "INCLUDE_CONFIG_FILE", file);
767 r = fseek(fp, off, SEEK_CUR);
768 if (r != 0)
769 err(EXIT_FAILURE, "fseek() failed");
770 for (i = 0; i < size; i++) {
771 r = fgetc(fp);
772 if (r == EOF)
773 break;
774 if (r == '\0') {
775 assert(i == size - 1 &&
776 ("\\0 found in the middle of a file"));
777 break;
778 }
779 fputc(r, stdout);
780 }
781 fclose(fp);
782 }
783
784 static void
badversion(void)785 badversion(void)
786 {
787 fprintf(stderr, "ERROR: version of config(8) does not match kernel!\n");
788 fprintf(stderr, "config version = %d, ", CONFIGVERS);
789 fprintf(stderr, "version required = %d\n\n", versreq);
790 fprintf(stderr, "Make sure that /usr/src/usr.sbin/config is in sync\n");
791 fprintf(stderr, "with your /usr/src/sys and install a new config binary\n");
792 fprintf(stderr, "before trying this again.\n\n");
793 fprintf(stderr, "If running the new config fails check your config\n");
794 fprintf(stderr, "file against the GENERIC or LINT config files for\n");
795 fprintf(stderr, "changes in config syntax, or option/device naming\n");
796 fprintf(stderr, "conventions\n\n");
797 exit(1);
798 }
799
800 static void
checkversion(void)801 checkversion(void)
802 {
803 FILE *ifp;
804 char line[BUFSIZ];
805
806 ifp = open_makefile_template();
807 while (fgets(line, BUFSIZ, ifp) != 0) {
808 if (*line != '%')
809 continue;
810 if (strncmp(line, "%VERSREQ=", 9) != 0)
811 continue;
812 versreq = atoi(line + 9);
813 if (MAJOR_VERS(versreq) == MAJOR_VERS(CONFIGVERS) &&
814 versreq <= CONFIGVERS)
815 continue;
816 badversion();
817 }
818 fclose(ifp);
819 }
820