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 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 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 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 302 init_line_buf(void) 303 { 304 305 line_buf.str(""); 306 } 307 308 static std::string 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 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 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 * 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 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 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 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 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 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 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 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 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 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