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 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 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 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 307 init_line_buf(void) 308 { 309 310 line_buf.str(""); 311 } 312 313 static std::string 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 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 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 * 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 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 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 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 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 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 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 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 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 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