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 #ifndef lint 33 static const char copyright[] = 34 "@(#) Copyright (c) 1980, 1993\n\ 35 The Regents of the University of California. All rights reserved.\n"; 36 #endif /* not lint */ 37 38 #ifndef lint 39 #if 0 40 static char sccsid[] = "@(#)main.c 8.1 (Berkeley) 6/6/93"; 41 #endif 42 #endif /* not lint */ 43 44 #include <sys/types.h> 45 #include <sys/stat.h> 46 #include <sys/file.h> 47 #include <sys/mman.h> 48 #include <sys/param.h> 49 50 #include <assert.h> 51 #include <ctype.h> 52 #include <dirent.h> 53 #include <err.h> 54 #include <iostream> 55 #include <sstream> 56 #include <stdio.h> 57 #include <string.h> 58 #include <sysexits.h> 59 #include <unistd.h> 60 61 #include "y.tab.h" 62 #include "config.h" 63 #include "configvers.h" 64 65 #ifndef TRUE 66 #define TRUE (1) 67 #endif 68 69 #ifndef FALSE 70 #define FALSE (0) 71 #endif 72 73 #define CDIR "../compile/" 74 75 char *machinename; 76 char *machinearch; 77 78 struct cfgfile_head cfgfiles; 79 struct cputype_head cputype; 80 struct opt_head opt, mkopt, rmopts; 81 struct opt_list_head otab; 82 struct envvar_head envvars; 83 struct hint_head hints; 84 struct includepath_head includepath; 85 86 char * PREFIX; 87 char destdir[MAXPATHLEN]; 88 char srcdir[MAXPATHLEN]; 89 90 int debugging; 91 int found_defaults; 92 int incignore; 93 94 /* 95 * Preserve old behaviour in INCLUDE_CONFIG_FILE handling (files are included 96 * literally). 97 */ 98 int filebased = 0; 99 int versreq; 100 101 static void configfile(void); 102 static void get_srcdir(void); 103 static void usage(void); 104 static void cleanheaders(char *); 105 static void kernconfdump(const char *); 106 static void badversion(void); 107 static void checkversion(void); 108 109 struct hdr_list { 110 const char *h_name; 111 struct hdr_list *h_next; 112 } *htab; 113 114 static std::stringstream line_buf; 115 116 /* 117 * Config builds a set of files for building a UNIX 118 * system given a description of the desired system. 119 */ 120 int 121 main(int argc, char **argv) 122 { 123 124 struct stat buf; 125 int ch, len; 126 char *p; 127 char *kernfile; 128 struct includepath* ipath; 129 int printmachine; 130 bool cust_dest = false; 131 132 printmachine = 0; 133 kernfile = NULL; 134 SLIST_INIT(&includepath); 135 SLIST_INIT(&cputype); 136 SLIST_INIT(&mkopt); 137 SLIST_INIT(&opt); 138 SLIST_INIT(&rmopts); 139 STAILQ_INIT(&cfgfiles); 140 STAILQ_INIT(&dtab); 141 STAILQ_INIT(&fntab); 142 STAILQ_INIT(&ftab); 143 STAILQ_INIT(&hints); 144 STAILQ_INIT(&envvars); 145 while ((ch = getopt(argc, argv, "Cd:gI:mps:Vx:")) != -1) 146 switch (ch) { 147 case 'C': 148 filebased = 1; 149 break; 150 case 'd': 151 if (*destdir == '\0') 152 strlcpy(destdir, optarg, sizeof(destdir)); 153 else 154 errx(EXIT_FAILURE, "directory already set"); 155 cust_dest = true; 156 break; 157 case 'g': 158 debugging++; 159 break; 160 case 'I': 161 ipath = (struct includepath *) \ 162 calloc(1, sizeof (struct includepath)); 163 if (ipath == NULL) 164 err(EXIT_FAILURE, "calloc"); 165 ipath->path = optarg; 166 SLIST_INSERT_HEAD(&includepath, ipath, path_next); 167 break; 168 case 'm': 169 printmachine = 1; 170 break; 171 case 's': 172 if (*srcdir == '\0') 173 strlcpy(srcdir, optarg, sizeof(srcdir)); 174 else 175 errx(EXIT_FAILURE, "src directory already set"); 176 break; 177 case 'V': 178 printf("%d\n", CONFIGVERS); 179 exit(0); 180 case 'x': 181 kernfile = optarg; 182 break; 183 case '?': 184 default: 185 usage(); 186 } 187 argc -= optind; 188 argv += optind; 189 190 if (kernfile != NULL) { 191 kernconfdump(kernfile); 192 exit(EXIT_SUCCESS); 193 } 194 195 if (argc != 1) 196 usage(); 197 198 PREFIX = *argv; 199 if (stat(PREFIX, &buf) != 0 || !S_ISREG(buf.st_mode)) 200 err(2, "%s", PREFIX); 201 if (freopen("DEFAULTS", "r", stdin) != NULL) { 202 found_defaults = 1; 203 yyfile = "DEFAULTS"; 204 } else { 205 if (freopen(PREFIX, "r", stdin) == NULL) 206 err(2, "%s", PREFIX); 207 yyfile = PREFIX; 208 } 209 if (*destdir != '\0') { 210 len = strlen(destdir); 211 while (len > 1 && destdir[len - 1] == '/') 212 destdir[--len] = '\0'; 213 if (*srcdir == '\0') 214 get_srcdir(); 215 } else { 216 strlcpy(destdir, CDIR, sizeof(destdir)); 217 strlcat(destdir, PREFIX, sizeof(destdir)); 218 } 219 220 if (yyparse()) 221 exit(3); 222 223 /* 224 * Ensure that required elements (machine, cpu, ident) are present. 225 */ 226 if (machinename == NULL) { 227 printf("Specify machine type, e.g. ``machine i386''\n"); 228 exit(1); 229 } 230 if (ident == NULL) { 231 printf("no ident line specified\n"); 232 exit(1); 233 } 234 if (SLIST_EMPTY(&cputype)) { 235 printf("cpu type must be specified\n"); 236 exit(1); 237 } 238 checkversion(); 239 240 if (printmachine) { 241 printf("%s\t%s\n",machinename,machinearch); 242 exit(0); 243 } 244 245 /* 246 * Make CDIR directory, if doing a default destination. Some version 247 * control systems delete empty directories and this seemlessly copes. 248 */ 249 if (!cust_dest && stat(CDIR, &buf)) 250 if (mkdir(CDIR, 0777)) 251 err(2, "%s", CDIR); 252 /* Create the compile directory */ 253 p = path((char *)NULL); 254 if (stat(p, &buf)) { 255 if (mkdir(p, 0777)) 256 err(2, "%s", p); 257 } else if (!S_ISDIR(buf.st_mode)) 258 errx(EXIT_FAILURE, "%s isn't a directory", p); 259 260 configfile(); /* put config file into kernel*/ 261 options(); /* make options .h files */ 262 makefile(); /* build Makefile */ 263 makeenv(); /* build env.c */ 264 makehints(); /* build hints.c */ 265 headers(); /* make a lot of .h files */ 266 cleanheaders(p); 267 printf("Kernel build directory is %s\n", p); 268 printf("Don't forget to do ``make cleandepend && make depend''\n"); 269 exit(0); 270 } 271 272 /* 273 * get_srcdir 274 * determine the root of the kernel source tree 275 * and save that in srcdir. 276 */ 277 static void 278 get_srcdir(void) 279 { 280 struct stat lg, phy; 281 char *p, *pwd; 282 int i; 283 284 if (realpath("../..", srcdir) == NULL) 285 err(EXIT_FAILURE, "Unable to find root of source tree"); 286 if ((pwd = getenv("PWD")) != NULL && *pwd == '/' && 287 (pwd = strdup(pwd)) != NULL) { 288 /* Remove the last two path components. */ 289 for (i = 0; i < 2; i++) { 290 if ((p = strrchr(pwd, '/')) == NULL) { 291 free(pwd); 292 return; 293 } 294 *p = '\0'; 295 } 296 if (stat(pwd, &lg) != -1 && stat(srcdir, &phy) != -1 && 297 lg.st_dev == phy.st_dev && lg.st_ino == phy.st_ino) 298 strlcpy(srcdir, pwd, MAXPATHLEN); 299 free(pwd); 300 } 301 } 302 303 static void 304 usage(void) 305 { 306 307 fprintf(stderr, 308 "usage: config [-CgmpV] [-d destdir] [-s srcdir] sysname\n"); 309 fprintf(stderr, " config -x kernel\n"); 310 exit(EX_USAGE); 311 } 312 313 static void 314 init_line_buf(void) 315 { 316 317 line_buf.str(""); 318 } 319 320 static std::string 321 get_line_buf(void) 322 { 323 324 line_buf.flush(); 325 if (!line_buf.good()) { 326 errx(EXIT_FAILURE, "failed to generate line buffer, " 327 "partial line = %s", line_buf.str().c_str()); 328 } 329 330 return line_buf.str(); 331 } 332 333 /* 334 * get_word 335 * returns EOF on end of file 336 * NULL on end of line 337 * pointer to the word otherwise 338 */ 339 configword 340 get_word(FILE *fp) 341 { 342 int ch; 343 int escaped_nl = 0; 344 345 init_line_buf(); 346 begin: 347 while ((ch = getc(fp)) != EOF) 348 if (ch != ' ' && ch != '\t') 349 break; 350 if (ch == EOF) 351 return (configword().eof(true)); 352 if (ch == '\\'){ 353 escaped_nl = 1; 354 goto begin; 355 } 356 if (ch == '\n') { 357 if (escaped_nl){ 358 escaped_nl = 0; 359 goto begin; 360 } 361 else 362 return (configword().eol(true)); 363 } 364 line_buf << (char)ch; 365 /* Negation operator is a word by itself. */ 366 if (ch == '!') { 367 return (configword(get_line_buf())); 368 } 369 while ((ch = getc(fp)) != EOF) { 370 if (isspace(ch)) 371 break; 372 line_buf << (char)ch; 373 } 374 if (ch == EOF) 375 return (configword().eof(true)); 376 (void) ungetc(ch, fp); 377 return (configword(get_line_buf())); 378 } 379 380 /* 381 * get_quoted_word 382 * like get_word but will accept something in double or single quotes 383 * (to allow embedded spaces). 384 */ 385 configword 386 get_quoted_word(FILE *fp) 387 { 388 int ch; 389 int escaped_nl = 0; 390 391 init_line_buf(); 392 begin: 393 while ((ch = getc(fp)) != EOF) 394 if (ch != ' ' && ch != '\t') 395 break; 396 if (ch == EOF) 397 return (configword().eof(true)); 398 if (ch == '\\'){ 399 escaped_nl = 1; 400 goto begin; 401 } 402 if (ch == '\n') { 403 if (escaped_nl){ 404 escaped_nl = 0; 405 goto begin; 406 } 407 else 408 return (configword().eol(true)); 409 } 410 if (ch == '"' || ch == '\'') { 411 int quote = ch; 412 413 escaped_nl = 0; 414 while ((ch = getc(fp)) != EOF) { 415 if (ch == quote && !escaped_nl) 416 break; 417 if (ch == '\n' && !escaped_nl) { 418 printf("config: missing quote reading `%s'\n", 419 get_line_buf().c_str()); 420 exit(2); 421 } 422 if (ch == '\\' && !escaped_nl) { 423 escaped_nl = 1; 424 continue; 425 } 426 if (ch != quote && escaped_nl) 427 line_buf << "\\"; 428 line_buf << (char)ch; 429 escaped_nl = 0; 430 } 431 } else { 432 line_buf << (char)ch; 433 while ((ch = getc(fp)) != EOF) { 434 if (isspace(ch)) 435 break; 436 line_buf << (char)ch; 437 } 438 if (ch != EOF) 439 (void) ungetc(ch, fp); 440 } 441 if (ch == EOF) 442 return (configword().eof(true)); 443 return (configword(get_line_buf())); 444 } 445 446 /* 447 * prepend the path to a filename 448 */ 449 char * 450 path(const char *file) 451 { 452 char *cp = NULL; 453 454 if (file) 455 asprintf(&cp, "%s/%s", destdir, file); 456 else 457 cp = strdup(destdir); 458 if (cp == NULL) 459 err(EXIT_FAILURE, "malloc"); 460 return (cp); 461 } 462 463 /* 464 * Generate configuration file based on actual settings. With this mode, user 465 * will be able to obtain and build conifguration file with one command. 466 */ 467 static void 468 configfile_dynamic(std::ostringstream &cfg) 469 { 470 struct cputype *cput; 471 struct device *d; 472 struct opt *ol; 473 char *lend; 474 unsigned int i; 475 476 asprintf(&lend, "\\n\\\n"); 477 assert(lend != NULL); 478 cfg << "options\t" << OPT_AUTOGEN << lend; 479 cfg << "ident\t" << ident << lend; 480 cfg << "machine\t" << machinename << lend; 481 SLIST_FOREACH(cput, &cputype, cpu_next) 482 cfg << "cpu\t" << cput->cpu_name << lend; 483 SLIST_FOREACH(ol, &mkopt, op_next) 484 cfg << "makeoptions\t" << ol->op_name << '=' << 485 ol->op_value << lend; 486 SLIST_FOREACH(ol, &opt, op_next) { 487 if (strncmp(ol->op_name, "DEV_", 4) == 0) 488 continue; 489 cfg << "options\t" << ol->op_name; 490 if (ol->op_value != NULL) { 491 cfg << '='; 492 for (i = 0; i < strlen(ol->op_value); i++) { 493 if (ol->op_value[i] == '"') 494 cfg << '\\' << ol->op_value[i]; 495 else 496 cfg << ol->op_value[i]; 497 } 498 } 499 500 cfg << lend; 501 } 502 /* 503 * Mark this file as containing everything we need. 504 */ 505 STAILQ_FOREACH(d, &dtab, d_next) 506 cfg << "device\t" << d->d_name << lend; 507 free(lend); 508 } 509 510 /* 511 * Generate file from the configuration files. 512 */ 513 static void 514 configfile_filebased(std::ostringstream &cfg) 515 { 516 FILE *cff; 517 struct cfgfile *cf; 518 int i; 519 520 /* 521 * Try to read all configuration files. Since those will be present as 522 * C string in the macro, we have to slash their ends then the line 523 * wraps. 524 */ 525 STAILQ_FOREACH(cf, &cfgfiles, cfg_next) { 526 cff = fopen(cf->cfg_path, "r"); 527 if (cff == NULL) { 528 warn("Couldn't open file %s", cf->cfg_path); 529 continue; 530 } 531 while ((i = getc(cff)) != EOF) { 532 if (i == '\n') 533 cfg << "\\n\\\n"; 534 else if (i == '"' || i == '\'') 535 cfg << '\\' << i; 536 else 537 cfg << i; 538 } 539 fclose(cff); 540 } 541 } 542 543 static void 544 configfile(void) 545 { 546 FILE *fo; 547 std::ostringstream cfg; 548 char *p; 549 550 /* Add main configuration file to the list of files to be included */ 551 cfgfile_add(PREFIX); 552 p = path("config.c.new"); 553 fo = fopen(p, "w"); 554 if (!fo) 555 err(2, "%s", p); 556 free(p); 557 558 if (filebased) { 559 /* Is needed, can be used for backward compatibility. */ 560 configfile_filebased(cfg); 561 } else { 562 configfile_dynamic(cfg); 563 } 564 565 cfg.flush(); 566 /* 567 * We print first part of the template, replace our tag with 568 * configuration files content and later continue writing our 569 * template. 570 */ 571 p = strstr(kernconfstr, KERNCONFTAG); 572 if (p == NULL) 573 errx(EXIT_FAILURE, "Something went terribly wrong!"); 574 *p = '\0'; 575 fprintf(fo, "%s", kernconfstr); 576 fprintf(fo, "%s", cfg.str().c_str()); 577 p += strlen(KERNCONFTAG); 578 fprintf(fo, "%s", p); 579 fclose(fo); 580 moveifchanged("config.c.new", "config.c"); 581 cfgfile_removeall(); 582 } 583 584 /* 585 * moveifchanged -- 586 * compare two files; rename if changed. 587 */ 588 void 589 moveifchanged(const char *from_name, const char *to_name) 590 { 591 char *p, *q; 592 char *from_path, *to_path; 593 int changed; 594 size_t tsize; 595 struct stat from_sb, to_sb; 596 int from_fd, to_fd; 597 598 changed = 0; 599 600 from_path = path(from_name); 601 to_path = path(to_name); 602 if ((from_fd = open(from_path, O_RDONLY)) < 0) 603 err(EX_OSERR, "moveifchanged open(%s)", from_name); 604 605 if ((to_fd = open(to_path, O_RDONLY)) < 0) 606 changed++; 607 608 if (!changed && fstat(from_fd, &from_sb) < 0) 609 err(EX_OSERR, "moveifchanged fstat(%s)", from_path); 610 611 if (!changed && fstat(to_fd, &to_sb) < 0) 612 err(EX_OSERR, "moveifchanged fstat(%s)", to_path); 613 614 if (!changed && from_sb.st_size != to_sb.st_size) 615 changed++; 616 617 if (!changed) { 618 tsize = (size_t)from_sb.st_size; 619 620 p = (char *)mmap(NULL, tsize, PROT_READ, MAP_SHARED, from_fd, 621 (off_t)0); 622 if (p == MAP_FAILED) 623 err(EX_OSERR, "mmap %s", from_path); 624 q = (char *)mmap(NULL, tsize, PROT_READ, MAP_SHARED, to_fd, 625 (off_t)0); 626 if (q == MAP_FAILED) 627 err(EX_OSERR, "mmap %s", to_path); 628 629 changed = memcmp(p, q, tsize); 630 munmap(p, tsize); 631 munmap(q, tsize); 632 } 633 634 if (changed) { 635 if (rename(from_path, to_path) < 0) 636 err(EX_OSERR, "rename(%s, %s)", from_path, to_path); 637 } else { 638 if (unlink(from_path) < 0) 639 err(EX_OSERR, "unlink(%s)", from_path); 640 } 641 642 close(from_fd); 643 if (to_fd >= 0) 644 close(to_fd); 645 646 free(from_path); 647 free(to_path); 648 } 649 650 static void 651 cleanheaders(char *p) 652 { 653 DIR *dirp; 654 struct dirent *dp; 655 struct file_list *fl; 656 struct hdr_list *hl; 657 size_t len; 658 659 remember("y.tab.h"); 660 remember("setdefs.h"); 661 STAILQ_FOREACH(fl, &ftab, f_next) 662 remember(fl->f_fn); 663 664 /* 665 * Scan the build directory and clean out stuff that looks like 666 * it might have been a leftover NFOO header, etc. 667 */ 668 if ((dirp = opendir(p)) == NULL) 669 err(EX_OSERR, "opendir %s", p); 670 while ((dp = readdir(dirp)) != NULL) { 671 len = strlen(dp->d_name); 672 /* Skip non-headers */ 673 if (len < 2 || dp->d_name[len - 2] != '.' || 674 dp->d_name[len - 1] != 'h') 675 continue; 676 /* Skip special stuff, eg: bus_if.h, but check opt_*.h */ 677 if (strchr(dp->d_name, '_') && 678 strncmp(dp->d_name, "opt_", 4) != 0) 679 continue; 680 /* Check if it is a target file */ 681 for (hl = htab; hl != NULL; hl = hl->h_next) { 682 if (eq(dp->d_name, hl->h_name)) { 683 break; 684 } 685 } 686 if (hl) 687 continue; 688 printf("Removing stale header: %s\n", dp->d_name); 689 p = path(dp->d_name); 690 if (unlink(p) == -1) 691 warn("unlink %s", dp->d_name); 692 free(p); 693 } 694 (void)closedir(dirp); 695 } 696 697 void 698 remember(const char *file) 699 { 700 const char *s; 701 struct hdr_list *hl; 702 703 if ((s = strrchr(file, '/')) != NULL) 704 s = ns(s + 1); 705 else 706 s = ns(file); 707 708 if (strchr(s, '_') && strncmp(s, "opt_", 4) != 0) { 709 free(__DECONST(char *, s)); 710 return; 711 } 712 for (hl = htab; hl != NULL; hl = hl->h_next) { 713 if (eq(s, hl->h_name)) { 714 free(__DECONST(char *, s)); 715 return; 716 } 717 } 718 hl = (struct hdr_list *)calloc(1, sizeof(*hl)); 719 if (hl == NULL) 720 err(EXIT_FAILURE, "calloc"); 721 hl->h_name = s; 722 hl->h_next = htab; 723 htab = hl; 724 } 725 726 /* 727 * This one is quick hack. Will be probably moved to elf(3) interface. 728 * It takes kernel configuration file name, passes it as an argument to 729 * elfdump -a, which output is parsed by some UNIX tools... 730 */ 731 static void 732 kernconfdump(const char *file) 733 { 734 struct stat st; 735 FILE *fp, *pp; 736 int error, osz, r; 737 size_t i, off, size, t1, t2, align; 738 char *cmd, *o; 739 740 r = open(file, O_RDONLY); 741 if (r == -1) 742 err(EXIT_FAILURE, "Couldn't open file '%s'", file); 743 error = fstat(r, &st); 744 if (error == -1) 745 err(EXIT_FAILURE, "fstat() failed"); 746 if (S_ISDIR(st.st_mode)) 747 errx(EXIT_FAILURE, "'%s' is a directory", file); 748 fp = fdopen(r, "r"); 749 if (fp == NULL) 750 err(EXIT_FAILURE, "fdopen() failed"); 751 osz = 1024; 752 o = (char *)calloc(1, osz); 753 if (o == NULL) 754 err(EXIT_FAILURE, "Couldn't allocate memory"); 755 /* ELF note section header. */ 756 asprintf(&cmd, "/usr/bin/elfdump -c %s | grep -A 8 kern_conf" 757 "| tail -5 | cut -d ' ' -f 2 | paste - - - - -", file); 758 if (cmd == NULL) 759 errx(EXIT_FAILURE, "asprintf() failed"); 760 pp = popen(cmd, "r"); 761 if (pp == NULL) 762 errx(EXIT_FAILURE, "popen() failed"); 763 free(cmd); 764 (void)fread(o, osz, 1, pp); 765 pclose(pp); 766 r = sscanf(o, "%zu%zu%zu%zu%zu", &off, &size, &t1, &t2, &align); 767 free(o); 768 if (size > SIZE_MAX - off || off + size > (size_t)st.st_size) 769 errx(EXIT_FAILURE, "%s: incoherent ELF headers", file); 770 if (r != 5) 771 errx(EXIT_FAILURE, "File %s doesn't contain configuration " 772 "file. Either unsupported, or not compiled with " 773 "INCLUDE_CONFIG_FILE", file); 774 r = fseek(fp, off, SEEK_CUR); 775 if (r != 0) 776 err(EXIT_FAILURE, "fseek() failed"); 777 for (i = 0; i < size; i++) { 778 r = fgetc(fp); 779 if (r == EOF) 780 break; 781 if (r == '\0') { 782 assert(i == size - 1 && 783 ("\\0 found in the middle of a file")); 784 break; 785 } 786 fputc(r, stdout); 787 } 788 fclose(fp); 789 } 790 791 static void 792 badversion(void) 793 { 794 fprintf(stderr, "ERROR: version of config(8) does not match kernel!\n"); 795 fprintf(stderr, "config version = %d, ", CONFIGVERS); 796 fprintf(stderr, "version required = %d\n\n", versreq); 797 fprintf(stderr, "Make sure that /usr/src/usr.sbin/config is in sync\n"); 798 fprintf(stderr, "with your /usr/src/sys and install a new config binary\n"); 799 fprintf(stderr, "before trying this again.\n\n"); 800 fprintf(stderr, "If running the new config fails check your config\n"); 801 fprintf(stderr, "file against the GENERIC or LINT config files for\n"); 802 fprintf(stderr, "changes in config syntax, or option/device naming\n"); 803 fprintf(stderr, "conventions\n\n"); 804 exit(1); 805 } 806 807 static void 808 checkversion(void) 809 { 810 FILE *ifp; 811 char line[BUFSIZ]; 812 813 ifp = open_makefile_template(); 814 while (fgets(line, BUFSIZ, ifp) != 0) { 815 if (*line != '%') 816 continue; 817 if (strncmp(line, "%VERSREQ=", 9) != 0) 818 continue; 819 versreq = atoi(line + 9); 820 if (MAJOR_VERS(versreq) == MAJOR_VERS(CONFIGVERS) && 821 versreq <= CONFIGVERS) 822 continue; 823 badversion(); 824 } 825 fclose(ifp); 826 } 827