main.c revision 1.612
1 /* $NetBSD: main.c,v 1.612 2024/03/10 02:53:37 sjg Exp $ */ 2 3 /* 4 * Copyright (c) 1988, 1989, 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Adam de Boor. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 /* 36 * Copyright (c) 1989 by Berkeley Softworks 37 * All rights reserved. 38 * 39 * This code is derived from software contributed to Berkeley by 40 * Adam de Boor. 41 * 42 * Redistribution and use in source and binary forms, with or without 43 * modification, are permitted provided that the following conditions 44 * are met: 45 * 1. Redistributions of source code must retain the above copyright 46 * notice, this list of conditions and the following disclaimer. 47 * 2. Redistributions in binary form must reproduce the above copyright 48 * notice, this list of conditions and the following disclaimer in the 49 * documentation and/or other materials provided with the distribution. 50 * 3. All advertising materials mentioning features or use of this software 51 * must display the following acknowledgement: 52 * This product includes software developed by the University of 53 * California, Berkeley and its contributors. 54 * 4. Neither the name of the University nor the names of its contributors 55 * may be used to endorse or promote products derived from this software 56 * without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 68 * SUCH DAMAGE. 69 */ 70 71 /* 72 * The main file for this entire program. Exit routines etc. reside here. 73 * 74 * Utility functions defined in this file: 75 * 76 * Main_ParseArgLine 77 * Parse and process command line arguments from a 78 * single string. Used to implement the special targets 79 * .MFLAGS and .MAKEFLAGS. 80 * 81 * Error Print a tagged error message. 82 * 83 * Fatal Print an error message and exit. 84 * 85 * Punt Abort all jobs and exit with a message. 86 * 87 * Finish Finish things up by printing the number of errors 88 * that occurred, and exit. 89 */ 90 91 #include <sys/types.h> 92 #include <sys/time.h> 93 #include <sys/param.h> 94 #include <sys/resource.h> 95 #include <sys/stat.h> 96 #ifdef MAKE_NATIVE 97 #include <sys/sysctl.h> 98 #endif 99 #include <sys/utsname.h> 100 #include <sys/wait.h> 101 102 #include <errno.h> 103 #include <signal.h> 104 #include <stdarg.h> 105 #include <time.h> 106 107 #include "make.h" 108 #include "dir.h" 109 #include "job.h" 110 #include "pathnames.h" 111 #include "trace.h" 112 113 /* "@(#)main.c 8.3 (Berkeley) 3/19/94" */ 114 MAKE_RCSID("$NetBSD: main.c,v 1.612 2024/03/10 02:53:37 sjg Exp $"); 115 #if defined(MAKE_NATIVE) 116 __COPYRIGHT("@(#) Copyright (c) 1988, 1989, 1990, 1993 " 117 "The Regents of the University of California. " 118 "All rights reserved."); 119 #endif 120 121 CmdOpts opts; 122 time_t now; /* Time at start of make */ 123 GNode *defaultNode; /* .DEFAULT node */ 124 bool allPrecious; /* .PRECIOUS given on a line by itself */ 125 bool deleteOnError; /* .DELETE_ON_ERROR: set */ 126 127 static int maxJobTokens; /* -j argument */ 128 static bool enterFlagObj; /* -w and objdir != srcdir */ 129 130 static int jp_0 = -1, jp_1 = -1; /* ends of parent job pipe */ 131 bool doing_depend; /* Set while reading .depend */ 132 static bool jobsRunning; /* true if the jobs might be running */ 133 static const char *tracefile; 134 static bool ReadMakefile(const char *); 135 static void purge_relative_cached_realpaths(void); 136 137 static bool ignorePWD; /* if we use -C, PWD is meaningless */ 138 static char objdir[MAXPATHLEN + 1]; /* where we chdir'ed to */ 139 char curdir[MAXPATHLEN + 1]; /* Startup directory */ 140 const char *progname; 141 char *makeDependfile; 142 pid_t myPid; 143 int makelevel; 144 145 bool forceJobs = false; 146 static int main_errors = 0; 147 static HashTable cached_realpaths; 148 149 /* 150 * For compatibility with the POSIX version of MAKEFLAGS that includes 151 * all the options without '-', convert 'flags' to '-f -l -a -g -s '. 152 */ 153 static char * 154 explode(const char *flags) 155 { 156 char *exploded, *ep; 157 const char *p; 158 159 if (flags == NULL) 160 return NULL; 161 162 for (p = flags; *p != '\0'; p++) 163 if (!ch_isalpha(*p)) 164 return bmake_strdup(flags); 165 166 exploded = bmake_malloc((size_t)(p - flags) * 3 + 1); 167 for (p = flags, ep = exploded; *p != '\0'; p++) { 168 *ep++ = '-'; 169 *ep++ = *p; 170 *ep++ = ' '; 171 } 172 *ep = '\0'; 173 return exploded; 174 } 175 176 MAKE_ATTR_DEAD static void 177 usage(void) 178 { 179 size_t prognameLen = strcspn(progname, "["); 180 181 (void)fprintf(stderr, 182 "usage: %.*s [-BeikNnqrSstWwX]\n" 183 " [-C directory] [-D variable] [-d flags] [-f makefile]\n" 184 " [-I directory] [-J private] [-j max_jobs] [-m directory] [-T file]\n" 185 " [-V variable] [-v variable] [variable=value] [target ...]\n", 186 (int)prognameLen, progname); 187 exit(2); 188 } 189 190 static void 191 MainParseArgDebugFile(const char *arg) 192 { 193 const char *mode; 194 size_t len; 195 char *fname; 196 197 if (opts.debug_file != stdout && opts.debug_file != stderr) 198 fclose(opts.debug_file); 199 200 if (*arg == '+') { 201 arg++; 202 mode = "a"; 203 } else 204 mode = "w"; 205 206 if (strcmp(arg, "stdout") == 0) { 207 opts.debug_file = stdout; 208 return; 209 } 210 if (strcmp(arg, "stderr") == 0) { 211 opts.debug_file = stderr; 212 return; 213 } 214 215 len = strlen(arg); 216 fname = bmake_malloc(len + 20); 217 memcpy(fname, arg, len + 1); 218 219 /* Replace the trailing '%d' after '.%d' with the pid. */ 220 if (len >= 3 && memcmp(fname + len - 3, ".%d", 3) == 0) 221 snprintf(fname + len - 2, 20, "%d", getpid()); 222 223 opts.debug_file = fopen(fname, mode); 224 if (opts.debug_file == NULL) { 225 fprintf(stderr, "Cannot open debug file \"%s\"\n", fname); 226 exit(2); 227 } 228 free(fname); 229 } 230 231 static void 232 MainParseArgDebug(const char *argvalue) 233 { 234 const char *modules; 235 DebugFlags debug = opts.debug; 236 237 for (modules = argvalue; *modules != '\0'; modules++) { 238 switch (*modules) { 239 case '0': /* undocumented, only intended for tests */ 240 memset(&debug, 0, sizeof(debug)); 241 break; 242 case 'A': 243 memset(&debug, ~0, sizeof(debug)); 244 break; 245 case 'a': 246 debug.DEBUG_ARCH = true; 247 break; 248 case 'C': 249 debug.DEBUG_CWD = true; 250 break; 251 case 'c': 252 debug.DEBUG_COND = true; 253 break; 254 case 'd': 255 debug.DEBUG_DIR = true; 256 break; 257 case 'e': 258 debug.DEBUG_ERROR = true; 259 break; 260 case 'f': 261 debug.DEBUG_FOR = true; 262 break; 263 case 'g': 264 if (modules[1] == '1') { 265 debug.DEBUG_GRAPH1 = true; 266 modules++; 267 } else if (modules[1] == '2') { 268 debug.DEBUG_GRAPH2 = true; 269 modules++; 270 } else if (modules[1] == '3') { 271 debug.DEBUG_GRAPH3 = true; 272 modules++; 273 } 274 break; 275 case 'h': 276 debug.DEBUG_HASH = true; 277 break; 278 case 'j': 279 debug.DEBUG_JOB = true; 280 break; 281 case 'L': 282 opts.strict = true; 283 break; 284 case 'l': 285 debug.DEBUG_LOUD = true; 286 break; 287 case 'M': 288 debug.DEBUG_META = true; 289 break; 290 case 'm': 291 debug.DEBUG_MAKE = true; 292 break; 293 case 'n': 294 debug.DEBUG_SCRIPT = true; 295 break; 296 case 'p': 297 debug.DEBUG_PARSE = true; 298 break; 299 case 's': 300 debug.DEBUG_SUFF = true; 301 break; 302 case 't': 303 debug.DEBUG_TARG = true; 304 break; 305 case 'V': 306 opts.debugVflag = true; 307 break; 308 case 'v': 309 debug.DEBUG_VAR = true; 310 break; 311 case 'x': 312 debug.DEBUG_SHELL = true; 313 break; 314 case 'F': 315 MainParseArgDebugFile(modules + 1); 316 goto finish; 317 default: 318 (void)fprintf(stderr, 319 "%s: illegal argument to d option -- %c\n", 320 progname, *modules); 321 usage(); 322 } 323 } 324 325 finish: 326 opts.debug = debug; 327 328 setvbuf(opts.debug_file, NULL, _IONBF, 0); 329 if (opts.debug_file != stdout) 330 setvbuf(stdout, NULL, _IOLBF, 0); 331 } 332 333 /* Is path relative or does it contain any relative component "." or ".."? */ 334 static bool 335 IsRelativePath(const char *path) 336 { 337 const char *p; 338 339 if (path[0] != '/') 340 return true; 341 p = path; 342 while ((p = strstr(p, "/.")) != NULL) { 343 p += 2; 344 if (*p == '.') 345 p++; 346 if (*p == '/' || *p == '\0') 347 return true; 348 } 349 return false; 350 } 351 352 static void 353 MainParseArgChdir(const char *argvalue) 354 { 355 struct stat sa, sb; 356 357 if (chdir(argvalue) == -1) { 358 (void)fprintf(stderr, "%s: chdir %s: %s\n", 359 progname, argvalue, strerror(errno)); 360 exit(2); /* Not 1 so -q can distinguish error */ 361 } 362 if (getcwd(curdir, MAXPATHLEN) == NULL) { 363 (void)fprintf(stderr, "%s: %s.\n", progname, strerror(errno)); 364 exit(2); 365 } 366 if (!IsRelativePath(argvalue) && 367 stat(argvalue, &sa) != -1 && 368 stat(curdir, &sb) != -1 && 369 sa.st_ino == sb.st_ino && 370 sa.st_dev == sb.st_dev) 371 strncpy(curdir, argvalue, MAXPATHLEN); 372 ignorePWD = true; 373 } 374 375 static void 376 MainParseArgJobsInternal(const char *argvalue) 377 { 378 char end; 379 if (sscanf(argvalue, "%d,%d%c", &jp_0, &jp_1, &end) != 2) { 380 (void)fprintf(stderr, 381 "%s: internal error -- J option malformed (%s)\n", 382 progname, argvalue); 383 usage(); 384 } 385 if ((fcntl(jp_0, F_GETFD, 0) < 0) || 386 (fcntl(jp_1, F_GETFD, 0) < 0)) { 387 jp_0 = -1; 388 jp_1 = -1; 389 opts.compatMake = true; 390 } else { 391 Global_Append(MAKEFLAGS, "-J"); 392 Global_Append(MAKEFLAGS, argvalue); 393 } 394 } 395 396 static void 397 MainParseArgJobs(const char *arg) 398 { 399 const char *p; 400 char *end; 401 char v[12]; 402 403 forceJobs = true; 404 opts.maxJobs = (int)strtol(arg, &end, 0); 405 p = end; 406 #ifdef _SC_NPROCESSORS_ONLN 407 if (*p != '\0') { 408 double d; 409 410 if (*p == 'C') 411 d = (opts.maxJobs > 0) ? opts.maxJobs : 1; 412 else if (*p == '.') { 413 d = strtod(arg, &end); 414 p = end; 415 } else 416 d = 0.0; 417 if (d > 0.0) { 418 p = ""; 419 opts.maxJobs = (int)sysconf(_SC_NPROCESSORS_ONLN); 420 opts.maxJobs = (int)(d * (double)opts.maxJobs); 421 } 422 } 423 #endif 424 if (*p != '\0' || opts.maxJobs < 1) { 425 (void)fprintf(stderr, 426 "%s: argument '%s' to option '-j' " 427 "must be a positive number\n", 428 progname, arg); 429 exit(2); /* Not 1 so -q can distinguish error */ 430 } 431 snprintf(v, sizeof(v), "%d", opts.maxJobs); 432 Global_Append(MAKEFLAGS, "-j"); 433 Global_Append(MAKEFLAGS, v); 434 Global_Set(".MAKE.JOBS", v); 435 maxJobTokens = opts.maxJobs; 436 } 437 438 static void 439 MainParseArgSysInc(const char *argvalue) 440 { 441 if (strncmp(argvalue, ".../", 4) == 0) { 442 char *found_path = Dir_FindHereOrAbove(curdir, argvalue + 4); 443 if (found_path == NULL) 444 return; 445 (void)SearchPath_Add(sysIncPath, found_path); 446 free(found_path); 447 } else { 448 (void)SearchPath_Add(sysIncPath, argvalue); 449 } 450 Global_Append(MAKEFLAGS, "-m"); 451 Global_Append(MAKEFLAGS, argvalue); 452 Dir_SetSYSPATH(); 453 } 454 455 static bool 456 MainParseOption(char c, const char *argvalue) 457 { 458 switch (c) { 459 case '\0': 460 break; 461 case 'B': 462 opts.compatMake = true; 463 Global_Append(MAKEFLAGS, "-B"); 464 Global_Set(".MAKE.MODE", "compat"); 465 break; 466 case 'C': 467 MainParseArgChdir(argvalue); 468 break; 469 case 'D': 470 if (argvalue[0] == '\0') 471 return false; 472 Var_SetExpand(SCOPE_GLOBAL, argvalue, "1"); 473 Global_Append(MAKEFLAGS, "-D"); 474 Global_Append(MAKEFLAGS, argvalue); 475 break; 476 case 'I': 477 SearchPath_Add(parseIncPath, argvalue); 478 Global_Append(MAKEFLAGS, "-I"); 479 Global_Append(MAKEFLAGS, argvalue); 480 break; 481 case 'J': 482 MainParseArgJobsInternal(argvalue); 483 break; 484 case 'N': 485 opts.noExecute = true; 486 opts.noRecursiveExecute = true; 487 Global_Append(MAKEFLAGS, "-N"); 488 break; 489 case 'S': 490 opts.keepgoing = false; 491 Global_Append(MAKEFLAGS, "-S"); 492 break; 493 case 'T': 494 tracefile = bmake_strdup(argvalue); 495 Global_Append(MAKEFLAGS, "-T"); 496 Global_Append(MAKEFLAGS, argvalue); 497 break; 498 case 'V': 499 case 'v': 500 opts.printVars = c == 'v' ? PVM_EXPANDED : PVM_UNEXPANDED; 501 Lst_Append(&opts.variables, bmake_strdup(argvalue)); 502 /* XXX: Why always -V? */ 503 Global_Append(MAKEFLAGS, "-V"); 504 Global_Append(MAKEFLAGS, argvalue); 505 break; 506 case 'W': 507 opts.parseWarnFatal = true; 508 /* XXX: why no Global_Append? */ 509 break; 510 case 'X': 511 opts.varNoExportEnv = true; 512 Global_Append(MAKEFLAGS, "-X"); 513 break; 514 case 'd': 515 /* If '-d-opts' don't pass to children */ 516 if (argvalue[0] == '-') 517 argvalue++; 518 else { 519 Global_Append(MAKEFLAGS, "-d"); 520 Global_Append(MAKEFLAGS, argvalue); 521 } 522 MainParseArgDebug(argvalue); 523 break; 524 case 'e': 525 opts.checkEnvFirst = true; 526 Global_Append(MAKEFLAGS, "-e"); 527 break; 528 case 'f': 529 Lst_Append(&opts.makefiles, bmake_strdup(argvalue)); 530 break; 531 case 'i': 532 opts.ignoreErrors = true; 533 Global_Append(MAKEFLAGS, "-i"); 534 break; 535 case 'j': 536 MainParseArgJobs(argvalue); 537 break; 538 case 'k': 539 opts.keepgoing = true; 540 Global_Append(MAKEFLAGS, "-k"); 541 break; 542 case 'm': 543 MainParseArgSysInc(argvalue); 544 /* XXX: why no Var_Append? */ 545 break; 546 case 'n': 547 opts.noExecute = true; 548 Global_Append(MAKEFLAGS, "-n"); 549 break; 550 case 'q': 551 opts.query = true; 552 /* Kind of nonsensical, wot? */ 553 Global_Append(MAKEFLAGS, "-q"); 554 break; 555 case 'r': 556 opts.noBuiltins = true; 557 Global_Append(MAKEFLAGS, "-r"); 558 break; 559 case 's': 560 opts.silent = true; 561 Global_Append(MAKEFLAGS, "-s"); 562 break; 563 case 't': 564 opts.touch = true; 565 Global_Append(MAKEFLAGS, "-t"); 566 break; 567 case 'w': 568 opts.enterFlag = true; 569 Global_Append(MAKEFLAGS, "-w"); 570 break; 571 default: 572 usage(); 573 } 574 return true; 575 } 576 577 /* 578 * Parse the given arguments. Called from main() and from 579 * Main_ParseArgLine() when the .MAKEFLAGS target is used. 580 * 581 * The arguments must be treated as read-only and will be freed after the 582 * call. 583 * 584 * XXX: Deal with command line overriding .MAKEFLAGS in makefile 585 */ 586 static void 587 MainParseArgs(int argc, char **argv) 588 { 589 char c; 590 int arginc; 591 char *argvalue; 592 char *optscan; 593 bool inOption, dashDash = false; 594 595 const char *optspecs = "BC:D:I:J:NST:V:WXd:ef:ij:km:nqrstv:w"; 596 /* Can't actually use getopt(3) because rescanning is not portable */ 597 598 rearg: 599 inOption = false; 600 optscan = NULL; 601 while (argc > 1) { 602 const char *optspec; 603 if (!inOption) 604 optscan = argv[1]; 605 c = *optscan++; 606 arginc = 0; 607 if (inOption) { 608 if (c == '\0') { 609 argv++; 610 argc--; 611 inOption = false; 612 continue; 613 } 614 } else { 615 if (c != '-' || dashDash) 616 break; 617 inOption = true; 618 c = *optscan++; 619 } 620 /* '-' found at some earlier point */ 621 optspec = strchr(optspecs, c); 622 if (c != '\0' && optspec != NULL && optspec[1] == ':') { 623 /* 624 * -<something> found, and <something> should have an 625 * argument 626 */ 627 inOption = false; 628 arginc = 1; 629 argvalue = optscan; 630 if (*argvalue == '\0') { 631 if (argc < 3) 632 goto noarg; 633 argvalue = argv[2]; 634 arginc = 2; 635 } 636 } else { 637 argvalue = NULL; 638 } 639 switch (c) { 640 case '\0': 641 arginc = 1; 642 inOption = false; 643 break; 644 case '-': 645 dashDash = true; 646 break; 647 default: 648 if (!MainParseOption(c, argvalue)) 649 goto noarg; 650 } 651 argv += arginc; 652 argc -= arginc; 653 } 654 655 /* 656 * See if the rest of the arguments are variable assignments and 657 * perform them if so. Else take them to be targets and stuff them 658 * on the end of the "create" list. 659 */ 660 for (; argc > 1; argv++, argc--) { 661 if (!Parse_VarAssign(argv[1], false, SCOPE_CMDLINE)) { 662 if (argv[1][0] == '\0') 663 Punt("illegal (null) argument."); 664 if (argv[1][0] == '-' && !dashDash) 665 goto rearg; 666 Lst_Append(&opts.create, bmake_strdup(argv[1])); 667 } 668 } 669 670 return; 671 noarg: 672 (void)fprintf(stderr, "%s: option requires an argument -- %c\n", 673 progname, c); 674 usage(); 675 } 676 677 /* 678 * Break a line of arguments into words and parse them. 679 * 680 * Used when a .MFLAGS or .MAKEFLAGS target is encountered during parsing and 681 * by main() when reading the MAKEFLAGS environment variable. 682 */ 683 void 684 Main_ParseArgLine(const char *line) 685 { 686 Words words; 687 char *buf; 688 const char *p; 689 690 if (line == NULL) 691 return; 692 for (p = line; *p == ' '; p++) 693 continue; 694 if (p[0] == '\0') 695 return; 696 697 { 698 FStr argv0 = Var_Value(SCOPE_GLOBAL, ".MAKE"); 699 buf = str_concat3(argv0.str, " ", p); 700 FStr_Done(&argv0); 701 } 702 703 words = Str_Words(buf, true); 704 if (words.words == NULL) { 705 Error("Unterminated quoted string [%s]", buf); 706 free(buf); 707 return; 708 } 709 free(buf); 710 MainParseArgs((int)words.len, words.words); 711 712 Words_Free(words); 713 } 714 715 bool 716 Main_SetObjdir(bool writable, const char *fmt, ...) 717 { 718 struct stat sb; 719 char *path; 720 char buf[MAXPATHLEN + 1]; 721 char buf2[MAXPATHLEN + 1]; 722 va_list ap; 723 724 va_start(ap, fmt); 725 vsnprintf(path = buf, MAXPATHLEN, fmt, ap); 726 va_end(ap); 727 728 if (path[0] != '/') { 729 if (snprintf(buf2, MAXPATHLEN, "%s/%s", curdir, path) <= MAXPATHLEN) 730 path = buf2; 731 else 732 return false; 733 } 734 735 /* look for the directory and try to chdir there */ 736 if (stat(path, &sb) != 0 || !S_ISDIR(sb.st_mode)) 737 return false; 738 739 if ((writable && access(path, W_OK) != 0) || chdir(path) != 0) { 740 (void)fprintf(stderr, "%s: warning: %s: %s.\n", 741 progname, path, strerror(errno)); 742 return false; 743 } 744 745 snprintf(objdir, sizeof objdir, "%s", path); 746 Global_Set(".OBJDIR", objdir); 747 setenv("PWD", objdir, 1); 748 Dir_InitDot(); 749 purge_relative_cached_realpaths(); 750 if (opts.enterFlag && strcmp(objdir, curdir) != 0) 751 enterFlagObj = true; 752 return true; 753 } 754 755 static bool 756 SetVarObjdir(bool writable, const char *var, const char *suffix) 757 { 758 FStr path = Var_Value(SCOPE_CMDLINE, var); 759 760 if (path.str == NULL || path.str[0] == '\0') { 761 FStr_Done(&path); 762 return false; 763 } 764 765 Var_Expand(&path, SCOPE_GLOBAL, VARE_WANTRES); 766 767 (void)Main_SetObjdir(writable, "%s%s", path.str, suffix); 768 769 FStr_Done(&path); 770 return true; 771 } 772 773 /* 774 * Splits str into words (in-place, modifying it), adding them to the list. 775 * The string must be kept alive as long as the list. 776 */ 777 void 778 AppendWords(StringList *lp, char *str) 779 { 780 char *p; 781 const char *sep = " \t"; 782 783 for (p = strtok(str, sep); p != NULL; p = strtok(NULL, sep)) 784 Lst_Append(lp, p); 785 } 786 787 #ifdef SIGINFO 788 /*ARGSUSED*/ 789 static void 790 siginfo(int signo MAKE_ATTR_UNUSED) 791 { 792 char dir[MAXPATHLEN]; 793 char str[2 * MAXPATHLEN]; 794 int len; 795 if (getcwd(dir, sizeof dir) == NULL) 796 return; 797 len = snprintf(str, sizeof str, "%s: Working in: %s\n", progname, dir); 798 if (len > 0) 799 (void)write(STDERR_FILENO, str, (size_t)len); 800 } 801 #endif 802 803 /* Allow makefiles some control over the mode we run in. */ 804 static void 805 MakeMode(void) 806 { 807 char *mode = Var_Subst("${.MAKE.MODE:tl}", 808 SCOPE_GLOBAL, VARE_WANTRES); 809 /* TODO: handle errors */ 810 811 if (mode[0] != '\0') { 812 if (strstr(mode, "compat") != NULL) { 813 opts.compatMake = true; 814 forceJobs = false; 815 } 816 #if USE_META 817 if (strstr(mode, "meta") != NULL) 818 meta_mode_init(mode); 819 #endif 820 if (strstr(mode, "randomize-targets") != NULL) 821 opts.randomizeTargets = true; 822 } 823 824 free(mode); 825 } 826 827 static void 828 PrintVar(const char *varname, bool expandVars) 829 { 830 if (strchr(varname, '$') != NULL) { 831 char *evalue = Var_Subst(varname, SCOPE_GLOBAL, VARE_WANTRES); 832 /* TODO: handle errors */ 833 printf("%s\n", evalue); 834 free(evalue); 835 836 } else if (expandVars) { 837 char *expr = str_concat3("${", varname, "}"); 838 char *evalue = Var_Subst(expr, SCOPE_GLOBAL, VARE_WANTRES); 839 /* TODO: handle errors */ 840 free(expr); 841 printf("%s\n", evalue); 842 free(evalue); 843 844 } else { 845 FStr value = Var_Value(SCOPE_GLOBAL, varname); 846 printf("%s\n", value.str != NULL ? value.str : ""); 847 FStr_Done(&value); 848 } 849 } 850 851 /* 852 * Return a bool based on a variable. 853 * 854 * If the knob is not set, return the fallback. 855 * If set, anything that looks or smells like "No", "False", "Off", "0", etc. 856 * is false, otherwise true. 857 */ 858 bool 859 GetBooleanExpr(const char *expr, bool fallback) 860 { 861 char *value; 862 bool res; 863 864 value = Var_Subst(expr, SCOPE_GLOBAL, VARE_WANTRES); 865 /* TODO: handle errors */ 866 res = ParseBoolean(value, fallback); 867 free(value); 868 return res; 869 } 870 871 static void 872 doPrintVars(void) 873 { 874 StringListNode *ln; 875 bool expandVars; 876 877 if (opts.printVars == PVM_EXPANDED) 878 expandVars = true; 879 else if (opts.debugVflag) 880 expandVars = false; 881 else 882 expandVars = GetBooleanExpr("${.MAKE.EXPAND_VARIABLES}", 883 false); 884 885 for (ln = opts.variables.first; ln != NULL; ln = ln->next) { 886 const char *varname = ln->datum; 887 PrintVar(varname, expandVars); 888 } 889 } 890 891 static bool 892 runTargets(void) 893 { 894 GNodeList targs = LST_INIT; /* target nodes to create */ 895 bool outOfDate; /* false if all targets up to date */ 896 897 /* 898 * Have now read the entire graph and need to make a list of 899 * targets to create. If none was given on the command line, 900 * we consult the parsing module to find the main target(s) 901 * to create. 902 */ 903 if (Lst_IsEmpty(&opts.create)) 904 Parse_MainName(&targs); 905 else 906 Targ_FindList(&targs, &opts.create); 907 908 if (!opts.compatMake) { 909 /* 910 * Initialize job module before traversing the graph 911 * now that any .BEGIN and .END targets have been read. 912 * This is done only if the -q flag wasn't given 913 * (to prevent the .BEGIN from being executed should 914 * it exist). 915 */ 916 if (!opts.query) { 917 Job_Init(); 918 jobsRunning = true; 919 } 920 921 /* Traverse the graph, checking on all the targets */ 922 outOfDate = Make_Run(&targs); 923 } else { 924 Compat_MakeAll(&targs); 925 outOfDate = false; 926 } 927 Lst_Done(&targs); /* Don't free the targets themselves. */ 928 return outOfDate; 929 } 930 931 /* 932 * Set up the .TARGETS variable to contain the list of targets to be created. 933 * If none specified, make the variable empty for now, the parser will fill 934 * in the default or .MAIN target later. 935 */ 936 static void 937 InitVarTargets(void) 938 { 939 StringListNode *ln; 940 941 if (Lst_IsEmpty(&opts.create)) { 942 Global_Set(".TARGETS", ""); 943 return; 944 } 945 946 for (ln = opts.create.first; ln != NULL; ln = ln->next) { 947 const char *name = ln->datum; 948 Global_Append(".TARGETS", name); 949 } 950 } 951 952 static void 953 InitRandom(void) 954 { 955 struct timeval tv; 956 957 gettimeofday(&tv, NULL); 958 srandom((unsigned int)(tv.tv_sec + tv.tv_usec)); 959 } 960 961 static const char * 962 InitVarMachine(const struct utsname *utsname MAKE_ATTR_UNUSED) 963 { 964 const char *machine = getenv("MACHINE"); 965 if (machine != NULL) 966 return machine; 967 968 #if defined(MAKE_NATIVE) 969 return utsname->machine; 970 #elif defined(MAKE_MACHINE) 971 return MAKE_MACHINE; 972 #else 973 return "unknown"; 974 #endif 975 } 976 977 static const char * 978 InitVarMachineArch(void) 979 { 980 const char *env = getenv("MACHINE_ARCH"); 981 if (env != NULL) 982 return env; 983 984 #ifdef MAKE_NATIVE 985 { 986 struct utsname utsname; 987 static char machine_arch_buf[sizeof utsname.machine]; 988 const int mib[2] = { CTL_HW, HW_MACHINE_ARCH }; 989 size_t len = sizeof machine_arch_buf; 990 991 if (sysctl(mib, (unsigned int)__arraycount(mib), 992 machine_arch_buf, &len, NULL, 0) < 0) { 993 (void)fprintf(stderr, "%s: sysctl failed (%s).\n", 994 progname, strerror(errno)); 995 exit(2); 996 } 997 998 return machine_arch_buf; 999 } 1000 #elif defined(MACHINE_ARCH) 1001 return MACHINE_ARCH; 1002 #elif defined(MAKE_MACHINE_ARCH) 1003 return MAKE_MACHINE_ARCH; 1004 #else 1005 return "unknown"; 1006 #endif 1007 } 1008 1009 #ifndef NO_PWD_OVERRIDE 1010 /* 1011 * Overriding getcwd() with $PWD totally breaks MAKEOBJDIRPREFIX 1012 * since the value of curdir can vary depending on how we got 1013 * here. That is, sitting at a shell prompt (shell that provides $PWD) 1014 * or via subdir.mk, in which case it's likely a shell which does 1015 * not provide it. 1016 * 1017 * So, to stop it breaking this case only, we ignore PWD if 1018 * MAKEOBJDIRPREFIX is set or MAKEOBJDIR contains an expression. 1019 */ 1020 static void 1021 HandlePWD(const struct stat *curdir_st) 1022 { 1023 char *pwd; 1024 FStr makeobjdir; 1025 struct stat pwd_st; 1026 1027 if (ignorePWD || (pwd = getenv("PWD")) == NULL) 1028 return; 1029 1030 if (Var_Exists(SCOPE_CMDLINE, "MAKEOBJDIRPREFIX")) 1031 return; 1032 1033 makeobjdir = Var_Value(SCOPE_CMDLINE, "MAKEOBJDIR"); 1034 if (makeobjdir.str != NULL && strchr(makeobjdir.str, '$') != NULL) 1035 goto ignore_pwd; 1036 1037 if (stat(pwd, &pwd_st) == 0 && 1038 curdir_st->st_ino == pwd_st.st_ino && 1039 curdir_st->st_dev == pwd_st.st_dev) 1040 (void)strncpy(curdir, pwd, MAXPATHLEN); 1041 1042 ignore_pwd: 1043 FStr_Done(&makeobjdir); 1044 } 1045 #endif 1046 1047 /* 1048 * Find the .OBJDIR. If MAKEOBJDIRPREFIX, or failing that, MAKEOBJDIR is set 1049 * in the environment, try only that value and fall back to .CURDIR if it 1050 * does not exist. 1051 * 1052 * Otherwise, try _PATH_OBJDIR.MACHINE-MACHINE_ARCH, _PATH_OBJDIR.MACHINE, 1053 * and finally _PATH_OBJDIRPREFIX`pwd`, in that order. If none of these 1054 * paths exist, just use .CURDIR. 1055 */ 1056 static void 1057 InitObjdir(const char *machine, const char *machine_arch) 1058 { 1059 bool writable; 1060 1061 Dir_InitCur(curdir); 1062 writable = GetBooleanExpr("${MAKE_OBJDIR_CHECK_WRITABLE}", true); 1063 (void)Main_SetObjdir(false, "%s", curdir); 1064 1065 if (!SetVarObjdir(writable, "MAKEOBJDIRPREFIX", curdir) && 1066 !SetVarObjdir(writable, "MAKEOBJDIR", "") && 1067 !Main_SetObjdir(writable, "%s.%s-%s", _PATH_OBJDIR, machine, machine_arch) && 1068 !Main_SetObjdir(writable, "%s.%s", _PATH_OBJDIR, machine) && 1069 !Main_SetObjdir(writable, "%s", _PATH_OBJDIR)) 1070 (void)Main_SetObjdir(writable, "%s%s", _PATH_OBJDIRPREFIX, curdir); 1071 } 1072 1073 /* get rid of resource limit on file descriptors */ 1074 static void 1075 UnlimitFiles(void) 1076 { 1077 #if defined(MAKE_NATIVE) || (defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE)) 1078 struct rlimit rl; 1079 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 && 1080 rl.rlim_cur != rl.rlim_max) { 1081 rl.rlim_cur = rl.rlim_max; 1082 (void)setrlimit(RLIMIT_NOFILE, &rl); 1083 } 1084 #endif 1085 } 1086 1087 static void 1088 CmdOpts_Init(void) 1089 { 1090 opts.compatMake = false; 1091 memset(&opts.debug, 0, sizeof(opts.debug)); 1092 /* opts.debug_file has already been initialized earlier */ 1093 opts.strict = false; 1094 opts.debugVflag = false; 1095 opts.checkEnvFirst = false; 1096 Lst_Init(&opts.makefiles); 1097 opts.ignoreErrors = false; /* Pay attention to non-zero returns */ 1098 opts.maxJobs = 1; 1099 opts.keepgoing = false; /* Stop on error */ 1100 opts.noRecursiveExecute = false; /* Execute all .MAKE targets */ 1101 opts.noExecute = false; /* Execute all commands */ 1102 opts.query = false; 1103 opts.noBuiltins = false; /* Read the built-in rules */ 1104 opts.silent = false; /* Print commands as executed */ 1105 opts.touch = false; 1106 opts.printVars = PVM_NONE; 1107 Lst_Init(&opts.variables); 1108 opts.parseWarnFatal = false; 1109 opts.enterFlag = false; 1110 opts.varNoExportEnv = false; 1111 Lst_Init(&opts.create); 1112 } 1113 1114 /* 1115 * Initialize MAKE and .MAKE to the path of the executable, so that it can be 1116 * found by execvp(3) and the shells, even after a chdir. 1117 * 1118 * If it's a relative path and contains a '/', resolve it to an absolute path. 1119 * Otherwise keep it as is, assuming it will be found in the PATH. 1120 */ 1121 static void 1122 InitVarMake(const char *argv0) 1123 { 1124 const char *make = argv0; 1125 1126 if (argv0[0] != '/' && strchr(argv0, '/') != NULL) { 1127 char pathbuf[MAXPATHLEN]; 1128 const char *abspath = cached_realpath(argv0, pathbuf); 1129 struct stat st; 1130 if (abspath != NULL && abspath[0] == '/' && 1131 stat(make, &st) == 0) 1132 make = abspath; 1133 } 1134 1135 Global_Set("MAKE", make); 1136 Global_Set(".MAKE", make); 1137 } 1138 1139 /* 1140 * Add the directories from the colon-separated syspath to defSysIncPath. 1141 * After returning, the contents of syspath is unspecified. 1142 */ 1143 static void 1144 InitDefSysIncPath(char *syspath) 1145 { 1146 static char defsyspath[] = _PATH_DEFSYSPATH; 1147 char *start, *p; 1148 1149 /* 1150 * If no user-supplied system path was given (through the -m option) 1151 * add the directories from the DEFSYSPATH (more than one may be given 1152 * as dir1:...:dirn) to the system include path. 1153 */ 1154 if (syspath == NULL || syspath[0] == '\0') 1155 syspath = defsyspath; 1156 else 1157 syspath = bmake_strdup(syspath); 1158 1159 for (start = syspath; *start != '\0'; start = p) { 1160 for (p = start; *p != '\0' && *p != ':'; p++) 1161 continue; 1162 if (*p == ':') 1163 *p++ = '\0'; 1164 1165 /* look for magic parent directory search string */ 1166 if (strncmp(start, ".../", 4) == 0) { 1167 char *dir = Dir_FindHereOrAbove(curdir, start + 4); 1168 if (dir != NULL) { 1169 (void)SearchPath_Add(defSysIncPath, dir); 1170 free(dir); 1171 } 1172 } else { 1173 (void)SearchPath_Add(defSysIncPath, start); 1174 } 1175 } 1176 1177 if (syspath != defsyspath) 1178 free(syspath); 1179 } 1180 1181 static void 1182 ReadBuiltinRules(void) 1183 { 1184 StringListNode *ln; 1185 StringList sysMkFiles = LST_INIT; 1186 1187 SearchPath_Expand( 1188 Lst_IsEmpty(&sysIncPath->dirs) ? defSysIncPath : sysIncPath, 1189 _PATH_DEFSYSMK, 1190 &sysMkFiles); 1191 if (Lst_IsEmpty(&sysMkFiles)) 1192 Fatal("%s: no system rules (%s).", progname, _PATH_DEFSYSMK); 1193 1194 for (ln = sysMkFiles.first; ln != NULL; ln = ln->next) 1195 if (ReadMakefile(ln->datum)) 1196 break; 1197 1198 if (ln == NULL) 1199 Fatal("%s: cannot open %s.", 1200 progname, (const char *)sysMkFiles.first->datum); 1201 1202 Lst_DoneCall(&sysMkFiles, free); 1203 } 1204 1205 static void 1206 InitMaxJobs(void) 1207 { 1208 char *value; 1209 int n; 1210 1211 if (forceJobs || opts.compatMake || 1212 !Var_Exists(SCOPE_GLOBAL, ".MAKE.JOBS")) 1213 return; 1214 1215 value = Var_Subst("${.MAKE.JOBS}", SCOPE_GLOBAL, VARE_WANTRES); 1216 /* TODO: handle errors */ 1217 n = (int)strtol(value, NULL, 0); 1218 if (n < 1) { 1219 (void)fprintf(stderr, 1220 "%s: illegal value for .MAKE.JOBS " 1221 "-- must be positive integer!\n", 1222 progname); 1223 exit(2); /* Not 1 so -q can distinguish error */ 1224 } 1225 1226 if (n != opts.maxJobs) { 1227 Global_Append(MAKEFLAGS, "-j"); 1228 Global_Append(MAKEFLAGS, value); 1229 } 1230 1231 opts.maxJobs = n; 1232 maxJobTokens = opts.maxJobs; 1233 forceJobs = true; 1234 free(value); 1235 } 1236 1237 /* 1238 * For compatibility, look at the directories in the VPATH variable 1239 * and add them to the search path, if the variable is defined. The 1240 * variable's value is in the same format as the PATH environment 1241 * variable, i.e. <directory>:<directory>:<directory>... 1242 */ 1243 static void 1244 InitVpath(void) 1245 { 1246 char *vpath, savec, *path; 1247 if (!Var_Exists(SCOPE_CMDLINE, "VPATH")) 1248 return; 1249 1250 vpath = Var_Subst("${VPATH}", SCOPE_CMDLINE, VARE_WANTRES); 1251 /* TODO: handle errors */ 1252 path = vpath; 1253 do { 1254 char *p; 1255 /* skip to end of directory */ 1256 for (p = path; *p != ':' && *p != '\0'; p++) 1257 continue; 1258 /* Save terminator character so know when to stop */ 1259 savec = *p; 1260 *p = '\0'; 1261 /* Add directory to search path */ 1262 (void)SearchPath_Add(&dirSearchPath, path); 1263 *p = savec; 1264 path = p + 1; 1265 } while (savec == ':'); 1266 free(vpath); 1267 } 1268 1269 static void 1270 ReadAllMakefiles(const StringList *makefiles) 1271 { 1272 StringListNode *ln; 1273 1274 for (ln = makefiles->first; ln != NULL; ln = ln->next) { 1275 const char *fname = ln->datum; 1276 if (!ReadMakefile(fname)) 1277 Fatal("%s: cannot open %s.", progname, fname); 1278 } 1279 } 1280 1281 static void 1282 ReadFirstDefaultMakefile(void) 1283 { 1284 StringList makefiles = LST_INIT; 1285 StringListNode *ln; 1286 char *prefs = Var_Subst("${.MAKE.MAKEFILE_PREFERENCE}", 1287 SCOPE_CMDLINE, VARE_WANTRES); 1288 /* TODO: handle errors */ 1289 1290 AppendWords(&makefiles, prefs); 1291 1292 for (ln = makefiles.first; ln != NULL; ln = ln->next) 1293 if (ReadMakefile(ln->datum)) 1294 break; 1295 1296 Lst_Done(&makefiles); 1297 free(prefs); 1298 } 1299 1300 /* 1301 * Initialize variables such as MAKE, MACHINE, .MAKEFLAGS. 1302 * Initialize a few modules. 1303 * Parse the arguments from MAKEFLAGS and the command line. 1304 */ 1305 static void 1306 main_Init(int argc, char **argv) 1307 { 1308 struct stat sa; 1309 const char *machine; 1310 const char *machine_arch; 1311 char *syspath = getenv("MAKESYSPATH"); 1312 struct utsname utsname; 1313 1314 /* default to writing debug to stderr */ 1315 opts.debug_file = stderr; 1316 1317 Str_Intern_Init(); 1318 HashTable_Init(&cached_realpaths); 1319 1320 #ifdef SIGINFO 1321 (void)bmake_signal(SIGINFO, siginfo); 1322 #endif 1323 1324 InitRandom(); 1325 1326 progname = str_basename(argv[0]); 1327 1328 UnlimitFiles(); 1329 1330 if (uname(&utsname) == -1) { 1331 (void)fprintf(stderr, "%s: uname failed (%s).\n", progname, 1332 strerror(errno)); 1333 exit(2); 1334 } 1335 1336 machine = InitVarMachine(&utsname); 1337 machine_arch = InitVarMachineArch(); 1338 1339 myPid = getpid(); /* remember this for vFork() */ 1340 1341 /* Just in case MAKEOBJDIR wants us to do something tricky. */ 1342 Targ_Init(); 1343 Var_Init(); 1344 Global_Set_ReadOnly(".MAKE.OS", utsname.sysname); 1345 Global_Set("MACHINE", machine); 1346 Global_Set("MACHINE_ARCH", machine_arch); 1347 #ifdef MAKE_VERSION 1348 Global_Set("MAKE_VERSION", MAKE_VERSION); 1349 #endif 1350 Global_Set_ReadOnly(".newline", "\n"); 1351 #ifndef MAKEFILE_PREFERENCE_LIST 1352 /* This is the traditional preference for makefiles. */ 1353 # define MAKEFILE_PREFERENCE_LIST "makefile Makefile" 1354 #endif 1355 Global_Set(".MAKE.MAKEFILE_PREFERENCE", MAKEFILE_PREFERENCE_LIST); 1356 Global_Set(".MAKE.DEPENDFILE", ".depend"); 1357 /* Tell makefiles like jobs.mk whether we support -jC */ 1358 #ifdef _SC_NPROCESSORS_ONLN 1359 Global_Set_ReadOnly(".MAKE.JOBS.C", "yes"); 1360 #else 1361 Global_Set_ReadOnly(".MAKE.JOBS.C", "no"); 1362 #endif 1363 1364 CmdOpts_Init(); 1365 allPrecious = false; /* Remove targets when interrupted */ 1366 deleteOnError = false; /* Historical default behavior */ 1367 jobsRunning = false; 1368 1369 maxJobTokens = opts.maxJobs; 1370 ignorePWD = false; 1371 1372 /* 1373 * Initialize the parsing, directory and variable modules to prepare 1374 * for the reading of inclusion paths and variable settings on the 1375 * command line 1376 */ 1377 1378 /* 1379 * Initialize various variables. 1380 * MAKE also gets this name, for compatibility 1381 * .MAKEFLAGS gets set to the empty string just in case. 1382 * MFLAGS also gets initialized empty, for compatibility. 1383 */ 1384 Parse_Init(); 1385 InitVarMake(argv[0]); 1386 Global_Set(MAKEFLAGS, ""); 1387 Global_Set(".MAKEOVERRIDES", ""); 1388 Global_Set("MFLAGS", ""); 1389 Global_Set(".ALLTARGETS", ""); 1390 Var_Set(SCOPE_CMDLINE, ".MAKE.LEVEL.ENV", MAKE_LEVEL_ENV); 1391 1392 /* Set some other useful variables. */ 1393 { 1394 char buf[64], *ep = getenv(MAKE_LEVEL_ENV); 1395 1396 makelevel = ep != NULL && ep[0] != '\0' ? atoi(ep) : 0; 1397 if (makelevel < 0) 1398 makelevel = 0; 1399 snprintf(buf, sizeof buf, "%d", makelevel); 1400 Global_Set(".MAKE.LEVEL", buf); 1401 snprintf(buf, sizeof buf, "%u", myPid); 1402 Global_Set_ReadOnly(".MAKE.PID", buf); 1403 snprintf(buf, sizeof buf, "%u", getppid()); 1404 Global_Set_ReadOnly(".MAKE.PPID", buf); 1405 snprintf(buf, sizeof buf, "%u", getuid()); 1406 Global_Set_ReadOnly(".MAKE.UID", buf); 1407 snprintf(buf, sizeof buf, "%u", getgid()); 1408 Global_Set_ReadOnly(".MAKE.GID", buf); 1409 } 1410 if (makelevel > 0) { 1411 char pn[1024]; 1412 snprintf(pn, sizeof pn, "%s[%d]", progname, makelevel); 1413 progname = bmake_strdup(pn); 1414 } 1415 1416 #ifdef USE_META 1417 meta_init(); 1418 #endif 1419 Dir_Init(); 1420 1421 { 1422 char *makeflags = explode(getenv("MAKEFLAGS")); 1423 Main_ParseArgLine(makeflags); 1424 free(makeflags); 1425 } 1426 1427 if (getcwd(curdir, MAXPATHLEN) == NULL) { 1428 (void)fprintf(stderr, "%s: getcwd: %s.\n", 1429 progname, strerror(errno)); 1430 exit(2); 1431 } 1432 1433 MainParseArgs(argc, argv); 1434 1435 if (opts.enterFlag) 1436 printf("%s: Entering directory `%s'\n", progname, curdir); 1437 1438 if (stat(curdir, &sa) == -1) { 1439 (void)fprintf(stderr, "%s: %s: %s.\n", 1440 progname, curdir, strerror(errno)); 1441 exit(2); 1442 } 1443 1444 #ifndef NO_PWD_OVERRIDE 1445 HandlePWD(&sa); 1446 #endif 1447 Global_Set(".CURDIR", curdir); 1448 1449 InitObjdir(machine, machine_arch); 1450 1451 Arch_Init(); 1452 Suff_Init(); 1453 Trace_Init(tracefile); 1454 1455 defaultNode = NULL; 1456 (void)time(&now); 1457 1458 Trace_Log(MAKESTART, NULL); 1459 1460 InitVarTargets(); 1461 1462 InitDefSysIncPath(syspath); 1463 } 1464 1465 /* 1466 * Read the system makefile followed by either makefile, Makefile or the 1467 * files given by the -f option. Exit on parse errors. 1468 */ 1469 static void 1470 main_ReadFiles(void) 1471 { 1472 1473 if (Lst_IsEmpty(&sysIncPath->dirs)) 1474 SearchPath_AddAll(sysIncPath, defSysIncPath); 1475 1476 Dir_SetSYSPATH(); 1477 if (!opts.noBuiltins) 1478 ReadBuiltinRules(); 1479 1480 posix_state = PS_MAYBE_NEXT_LINE; 1481 if (!Lst_IsEmpty(&opts.makefiles)) 1482 ReadAllMakefiles(&opts.makefiles); 1483 else 1484 ReadFirstDefaultMakefile(); 1485 } 1486 1487 /* Compute the dependency graph. */ 1488 static void 1489 main_PrepareMaking(void) 1490 { 1491 /* In particular suppress .depend for '-r -V .OBJDIR -f /dev/null' */ 1492 if (!opts.noBuiltins || opts.printVars == PVM_NONE) { 1493 makeDependfile = Var_Subst("${.MAKE.DEPENDFILE}", 1494 SCOPE_CMDLINE, VARE_WANTRES); 1495 if (makeDependfile[0] != '\0') { 1496 /* TODO: handle errors */ 1497 doing_depend = true; 1498 (void)ReadMakefile(makeDependfile); 1499 doing_depend = false; 1500 } 1501 } 1502 1503 if (enterFlagObj) 1504 printf("%s: Entering directory `%s'\n", progname, objdir); 1505 1506 MakeMode(); 1507 1508 { 1509 FStr makeflags = Var_Value(SCOPE_GLOBAL, MAKEFLAGS); 1510 Global_Append("MFLAGS", makeflags.str); 1511 FStr_Done(&makeflags); 1512 } 1513 1514 InitMaxJobs(); 1515 1516 if (!opts.compatMake && !forceJobs) 1517 opts.compatMake = true; 1518 1519 if (!opts.compatMake) 1520 Job_ServerStart(maxJobTokens, jp_0, jp_1); 1521 DEBUG5(JOB, "job_pipe %d %d, maxjobs %d, tokens %d, compat %d\n", 1522 jp_0, jp_1, opts.maxJobs, maxJobTokens, opts.compatMake ? 1 : 0); 1523 1524 if (opts.printVars == PVM_NONE) 1525 Main_ExportMAKEFLAGS(true); /* initial export */ 1526 1527 InitVpath(); 1528 1529 /* 1530 * Now that all search paths have been read for suffixes et al, it's 1531 * time to add the default search path to their lists... 1532 */ 1533 Suff_ExtendPaths(); 1534 1535 /* 1536 * Propagate attributes through :: dependency lists. 1537 */ 1538 Targ_Propagate(); 1539 1540 /* print the initial graph, if the user requested it */ 1541 if (DEBUG(GRAPH1)) 1542 Targ_PrintGraph(1); 1543 } 1544 1545 /* 1546 * Make the targets. 1547 * If the -v or -V options are given, print variables instead. 1548 * Return whether any of the targets is out-of-date. 1549 */ 1550 static bool 1551 main_Run(void) 1552 { 1553 if (opts.printVars != PVM_NONE) { 1554 /* print the values of any variables requested by the user */ 1555 doPrintVars(); 1556 return false; 1557 } else { 1558 return runTargets(); 1559 } 1560 } 1561 1562 /* Clean up after making the targets. */ 1563 static void 1564 main_CleanUp(void) 1565 { 1566 #ifdef CLEANUP 1567 Lst_DoneCall(&opts.variables, free); 1568 Lst_DoneCall(&opts.makefiles, free); 1569 Lst_DoneCall(&opts.create, free); 1570 #endif 1571 1572 if (DEBUG(GRAPH2)) 1573 Targ_PrintGraph(2); 1574 1575 Trace_Log(MAKEEND, NULL); 1576 1577 if (enterFlagObj) 1578 printf("%s: Leaving directory `%s'\n", progname, objdir); 1579 if (opts.enterFlag) 1580 printf("%s: Leaving directory `%s'\n", progname, curdir); 1581 1582 #ifdef USE_META 1583 meta_finish(); 1584 #endif 1585 Suff_End(); 1586 Targ_End(); 1587 Arch_End(); 1588 Var_End(); 1589 Parse_End(); 1590 Dir_End(); 1591 Job_End(); 1592 Trace_End(); 1593 Str_Intern_End(); 1594 } 1595 1596 /* Determine the exit code. */ 1597 static int 1598 main_Exit(bool outOfDate) 1599 { 1600 if (opts.strict && (main_errors > 0 || Parse_NumErrors() > 0)) 1601 return 2; /* Not 1 so -q can distinguish error */ 1602 return outOfDate ? 1 : 0; 1603 } 1604 1605 int 1606 main(int argc, char **argv) 1607 { 1608 bool outOfDate; 1609 1610 main_Init(argc, argv); 1611 main_ReadFiles(); 1612 main_PrepareMaking(); 1613 outOfDate = main_Run(); 1614 main_CleanUp(); 1615 return main_Exit(outOfDate); 1616 } 1617 1618 /* 1619 * Open and parse the given makefile, with all its side effects. 1620 * Return false if the file could not be opened. 1621 */ 1622 static bool 1623 ReadMakefile(const char *fname) 1624 { 1625 int fd; 1626 char *name, *path = NULL; 1627 1628 if (strcmp(fname, "-") == 0) { 1629 Parse_File("(stdin)", -1); 1630 Var_Set(SCOPE_INTERNAL, "MAKEFILE", ""); 1631 } else { 1632 /* if we've chdir'd, rebuild the path name */ 1633 if (strcmp(curdir, objdir) != 0 && *fname != '/') { 1634 path = str_concat3(curdir, "/", fname); 1635 fd = open(path, O_RDONLY); 1636 if (fd != -1) { 1637 fname = path; 1638 goto found; 1639 } 1640 free(path); 1641 1642 /* If curdir failed, try objdir (ala .depend) */ 1643 path = str_concat3(objdir, "/", fname); 1644 fd = open(path, O_RDONLY); 1645 if (fd != -1) { 1646 fname = path; 1647 goto found; 1648 } 1649 } else { 1650 fd = open(fname, O_RDONLY); 1651 if (fd != -1) 1652 goto found; 1653 } 1654 /* look in -I and system include directories. */ 1655 name = Dir_FindFile(fname, parseIncPath); 1656 if (name == NULL) { 1657 SearchPath *sysInc = Lst_IsEmpty(&sysIncPath->dirs) 1658 ? defSysIncPath : sysIncPath; 1659 name = Dir_FindFile(fname, sysInc); 1660 } 1661 if (name == NULL || (fd = open(name, O_RDONLY)) == -1) { 1662 free(name); 1663 free(path); 1664 return false; 1665 } 1666 fname = name; 1667 /* 1668 * set the MAKEFILE variable desired by System V fans -- the 1669 * placement of the setting here means it gets set to the last 1670 * makefile specified, as it is set by SysV make. 1671 */ 1672 found: 1673 if (!doing_depend) 1674 Var_Set(SCOPE_INTERNAL, "MAKEFILE", fname); 1675 Parse_File(fname, fd); 1676 } 1677 free(path); 1678 return true; 1679 } 1680 1681 /* 1682 * Execute the command in cmd, and return its output (only stdout, not 1683 * stderr, possibly empty). In the output, replace newlines with spaces. 1684 */ 1685 char * 1686 Cmd_Exec(const char *cmd, char **error) 1687 { 1688 const char *args[4]; /* Arguments for invoking the shell */ 1689 int pipefds[2]; 1690 int cpid; /* Child PID */ 1691 int pid; /* PID from wait() */ 1692 int status; /* command exit status */ 1693 Buffer buf; /* buffer to store the result */ 1694 ssize_t bytes_read; 1695 char *output; 1696 char *p; 1697 int saved_errno; 1698 char cmd_file[MAXPATHLEN]; 1699 size_t cmd_len; 1700 int cmd_fd = -1; 1701 1702 if (shellPath == NULL) 1703 Shell_Init(); 1704 1705 cmd_len = strlen(cmd); 1706 if (cmd_len > 1000) { 1707 cmd_fd = mkTempFile(NULL, cmd_file, sizeof(cmd_file)); 1708 if (cmd_fd >= 0) { 1709 ssize_t n; 1710 1711 n = write(cmd_fd, cmd, cmd_len); 1712 close(cmd_fd); 1713 if (n < (ssize_t)cmd_len) { 1714 unlink(cmd_file); 1715 cmd_fd = -1; 1716 } 1717 } 1718 } 1719 1720 args[0] = shellName; 1721 if (cmd_fd >= 0) { 1722 args[1] = cmd_file; 1723 args[2] = NULL; 1724 } else { 1725 cmd_file[0] = '\0'; 1726 args[1] = "-c"; 1727 args[2] = cmd; 1728 args[3] = NULL; 1729 } 1730 DEBUG1(VAR, "Capturing the output of command \"%s\"\n", cmd); 1731 1732 if (pipe(pipefds) == -1) { 1733 *error = str_concat3( 1734 "Couldn't create pipe for \"", cmd, "\""); 1735 return bmake_strdup(""); 1736 } 1737 1738 Var_ReexportVars(SCOPE_GLOBAL); 1739 1740 switch (cpid = vfork()) { 1741 case 0: 1742 (void)close(pipefds[0]); 1743 (void)dup2(pipefds[1], STDOUT_FILENO); 1744 (void)close(pipefds[1]); 1745 1746 (void)execv(shellPath, UNCONST(args)); 1747 _exit(1); 1748 /* NOTREACHED */ 1749 1750 case -1: 1751 *error = str_concat3("Couldn't exec \"", cmd, "\""); 1752 return bmake_strdup(""); 1753 } 1754 1755 (void)close(pipefds[1]); /* No need for the writing half */ 1756 1757 saved_errno = 0; 1758 Buf_Init(&buf); 1759 1760 do { 1761 char result[BUFSIZ]; 1762 bytes_read = read(pipefds[0], result, sizeof result); 1763 if (bytes_read > 0) 1764 Buf_AddBytes(&buf, result, (size_t)bytes_read); 1765 } while (bytes_read > 0 || (bytes_read == -1 && errno == EINTR)); 1766 if (bytes_read == -1) 1767 saved_errno = errno; 1768 1769 (void)close(pipefds[0]); /* Close the input side of the pipe. */ 1770 1771 while ((pid = waitpid(cpid, &status, 0)) != cpid && pid >= 0) 1772 JobReapChild(pid, status, false); 1773 1774 if (Buf_EndsWith(&buf, '\n')) 1775 buf.data[buf.len - 1] = '\0'; 1776 1777 output = Buf_DoneData(&buf); 1778 for (p = output; *p != '\0'; p++) 1779 if (*p == '\n') 1780 *p = ' '; 1781 1782 if (WIFSIGNALED(status)) 1783 *error = str_concat3("\"", cmd, "\" exited on a signal"); 1784 else if (WEXITSTATUS(status) != 0) 1785 *error = str_concat3( 1786 "\"", cmd, "\" returned non-zero status"); 1787 else if (saved_errno != 0) 1788 *error = str_concat3( 1789 "Couldn't read shell's output for \"", cmd, "\""); 1790 else 1791 *error = NULL; 1792 if (cmd_file[0] != '\0') 1793 unlink(cmd_file); 1794 return output; 1795 } 1796 1797 /* 1798 * Print a printf-style error message. 1799 * 1800 * In default mode, this error message has no consequences, for compatibility 1801 * reasons, in particular it does not affect the exit status. Only in lint 1802 * mode (-dL) it does. 1803 */ 1804 void 1805 Error(const char *fmt, ...) 1806 { 1807 va_list ap; 1808 FILE *f; 1809 1810 f = opts.debug_file; 1811 if (f == stdout) 1812 f = stderr; 1813 (void)fflush(stdout); 1814 1815 for (;;) { 1816 fprintf(f, "%s: ", progname); 1817 va_start(ap, fmt); 1818 (void)vfprintf(f, fmt, ap); 1819 va_end(ap); 1820 (void)fprintf(f, "\n"); 1821 (void)fflush(f); 1822 if (f == stderr) 1823 break; 1824 f = stderr; 1825 } 1826 main_errors++; 1827 } 1828 1829 /* 1830 * Wait for any running jobs to finish, then produce an error message, 1831 * finally exit immediately. 1832 * 1833 * Exiting immediately differs from Parse_Error, which exits only after the 1834 * current top-level makefile has been parsed completely. 1835 */ 1836 void 1837 Fatal(const char *fmt, ...) 1838 { 1839 va_list ap; 1840 1841 if (jobsRunning) 1842 Job_Wait(); 1843 1844 (void)fflush(stdout); 1845 fprintf(stderr, "%s: ", progname); 1846 va_start(ap, fmt); 1847 (void)vfprintf(stderr, fmt, ap); 1848 va_end(ap); 1849 (void)fprintf(stderr, "\n"); 1850 (void)fflush(stderr); 1851 PrintStackTrace(true); 1852 1853 PrintOnError(NULL, "\n"); 1854 1855 if (DEBUG(GRAPH2) || DEBUG(GRAPH3)) 1856 Targ_PrintGraph(2); 1857 Trace_Log(MAKEERROR, NULL); 1858 exit(2); /* Not 1 so -q can distinguish error */ 1859 } 1860 1861 /* 1862 * Major exception once jobs are being created. 1863 * Kills all jobs, prints a message and exits. 1864 */ 1865 void 1866 Punt(const char *fmt, ...) 1867 { 1868 va_list ap; 1869 1870 (void)fflush(stdout); 1871 (void)fprintf(stderr, "%s: ", progname); 1872 va_start(ap, fmt); 1873 (void)vfprintf(stderr, fmt, ap); 1874 va_end(ap); 1875 (void)fprintf(stderr, "\n"); 1876 (void)fflush(stderr); 1877 1878 PrintOnError(NULL, "\n"); 1879 1880 DieHorribly(); 1881 } 1882 1883 /* Exit without giving a message. */ 1884 void 1885 DieHorribly(void) 1886 { 1887 if (jobsRunning) 1888 Job_AbortAll(); 1889 if (DEBUG(GRAPH2)) 1890 Targ_PrintGraph(2); 1891 Trace_Log(MAKEERROR, NULL); 1892 exit(2); /* Not 1 so -q can distinguish error */ 1893 } 1894 1895 /* 1896 * Called when aborting due to errors in child shell to signal abnormal exit. 1897 * The program exits. 1898 * Errors is the number of errors encountered in Make_Make. 1899 */ 1900 void 1901 Finish(int errs) 1902 { 1903 if (shouldDieQuietly(NULL, -1)) 1904 exit(2); 1905 Fatal("%d error%s", errs, errs == 1 ? "" : "s"); 1906 } 1907 1908 int 1909 unlink_file(const char *file) 1910 { 1911 struct stat st; 1912 1913 if (lstat(file, &st) == -1) 1914 return -1; 1915 1916 if (S_ISDIR(st.st_mode)) { 1917 /* 1918 * POSIX says for unlink: "The path argument shall not name 1919 * a directory unless [...]". 1920 */ 1921 errno = EISDIR; 1922 return -1; 1923 } 1924 return unlink(file); 1925 } 1926 1927 static void 1928 write_all(int fd, const void *data, size_t n) 1929 { 1930 const char *mem = data; 1931 1932 while (n > 0) { 1933 ssize_t written = write(fd, mem, n); 1934 /* XXX: Should this EAGAIN be EINTR? */ 1935 if (written == -1 && errno == EAGAIN) 1936 continue; 1937 if (written == -1) 1938 break; 1939 mem += written; 1940 n -= (size_t)written; 1941 } 1942 } 1943 1944 /* Print why exec failed, avoiding stdio. */ 1945 void MAKE_ATTR_DEAD 1946 execDie(const char *af, const char *av) 1947 { 1948 Buffer buf; 1949 1950 Buf_Init(&buf); 1951 Buf_AddStr(&buf, progname); 1952 Buf_AddStr(&buf, ": "); 1953 Buf_AddStr(&buf, af); 1954 Buf_AddStr(&buf, "("); 1955 Buf_AddStr(&buf, av); 1956 Buf_AddStr(&buf, ") failed ("); 1957 Buf_AddStr(&buf, strerror(errno)); 1958 Buf_AddStr(&buf, ")\n"); 1959 1960 write_all(STDERR_FILENO, buf.data, buf.len); 1961 1962 Buf_Done(&buf); 1963 _exit(1); 1964 } 1965 1966 static void 1967 purge_relative_cached_realpaths(void) 1968 { 1969 HashEntry *he, *next; 1970 HashIter hi; 1971 1972 HashIter_Init(&hi, &cached_realpaths); 1973 he = HashIter_Next(&hi); 1974 while (he != NULL) { 1975 next = HashIter_Next(&hi); 1976 if (he->key[0] != '/') { 1977 DEBUG1(DIR, "cached_realpath: purging %s\n", he->key); 1978 HashTable_DeleteEntry(&cached_realpaths, he); 1979 /* 1980 * XXX: What about the allocated he->value? Either 1981 * free them or document why they cannot be freed. 1982 */ 1983 } 1984 he = next; 1985 } 1986 } 1987 1988 const char * 1989 cached_realpath(const char *pathname, char *resolved) 1990 { 1991 const char *rp; 1992 1993 if (pathname == NULL || pathname[0] == '\0') 1994 return NULL; 1995 1996 rp = HashTable_FindValue(&cached_realpaths, pathname); 1997 if (rp != NULL) { 1998 /* a hit */ 1999 strncpy(resolved, rp, MAXPATHLEN); 2000 resolved[MAXPATHLEN - 1] = '\0'; 2001 return resolved; 2002 } 2003 2004 rp = realpath(pathname, resolved); 2005 if (rp != NULL) { 2006 HashTable_Set(&cached_realpaths, pathname, bmake_strdup(rp)); 2007 DEBUG2(DIR, "cached_realpath: %s -> %s\n", pathname, rp); 2008 return resolved; 2009 } 2010 2011 /* should we negative-cache? */ 2012 return NULL; 2013 } 2014 2015 /* 2016 * Return true if we should die without noise. 2017 * For example our failing child was a sub-make or failure happened elsewhere. 2018 */ 2019 bool 2020 shouldDieQuietly(GNode *gn, int bf) 2021 { 2022 static int quietly = -1; 2023 2024 if (quietly < 0) { 2025 if (DEBUG(JOB) || 2026 !GetBooleanExpr("${.MAKE.DIE_QUIETLY}", true)) 2027 quietly = 0; 2028 else if (bf >= 0) 2029 quietly = bf; 2030 else 2031 quietly = (gn != NULL && (gn->type & OP_MAKE)) ? 1 : 0; 2032 } 2033 return quietly != 0; 2034 } 2035 2036 static void 2037 SetErrorVars(GNode *gn) 2038 { 2039 StringListNode *ln; 2040 char sts[16]; 2041 2042 /* 2043 * We can print this even if there is no .ERROR target. 2044 */ 2045 snprintf(sts, sizeof(sts), "%d", gn->exit_status); 2046 Global_Set(".ERROR_EXIT", sts); 2047 Global_Set(".ERROR_TARGET", gn->name); 2048 Global_Delete(".ERROR_CMD"); 2049 2050 for (ln = gn->commands.first; ln != NULL; ln = ln->next) { 2051 const char *cmd = ln->datum; 2052 2053 if (cmd == NULL) 2054 break; 2055 Global_Append(".ERROR_CMD", cmd); 2056 } 2057 } 2058 2059 /* 2060 * Print some helpful information in case of an error. 2061 * The caller should exit soon after calling this function. 2062 */ 2063 void 2064 PrintOnError(GNode *gn, const char *msg) 2065 { 2066 static GNode *errorNode = NULL; 2067 2068 if (DEBUG(HASH)) { 2069 Targ_Stats(); 2070 Var_Stats(); 2071 } 2072 2073 if (errorNode != NULL) 2074 return; /* we've been here! */ 2075 2076 printf("%s%s: stopped in %s\n", msg, progname, curdir); 2077 2078 /* we generally want to keep quiet if a sub-make died */ 2079 if (shouldDieQuietly(gn, -1)) 2080 return; 2081 2082 if (gn != NULL) 2083 SetErrorVars(gn); 2084 2085 { 2086 char *errorVarsValues = Var_Subst( 2087 "${MAKE_PRINT_VAR_ON_ERROR:@v@$v='${$v}'\n@}", 2088 SCOPE_GLOBAL, VARE_WANTRES); 2089 /* TODO: handle errors */ 2090 printf("%s", errorVarsValues); 2091 free(errorVarsValues); 2092 } 2093 2094 fflush(stdout); 2095 2096 /* 2097 * Finally, see if there is a .ERROR target, and run it if so. 2098 */ 2099 errorNode = Targ_FindNode(".ERROR"); 2100 if (errorNode != NULL) { 2101 errorNode->type |= OP_SPECIAL; 2102 Compat_Make(errorNode, errorNode); 2103 } 2104 } 2105 2106 void 2107 Main_ExportMAKEFLAGS(bool first) 2108 { 2109 static bool once = true; 2110 char *flags; 2111 2112 if (once != first) 2113 return; 2114 once = false; 2115 2116 flags = Var_Subst( 2117 "${.MAKEFLAGS} ${.MAKEOVERRIDES:O:u:@v@$v=${$v:Q}@}", 2118 SCOPE_CMDLINE, VARE_WANTRES); 2119 /* TODO: handle errors */ 2120 if (flags[0] != '\0') 2121 setenv("MAKEFLAGS", flags, 1); 2122 } 2123 2124 char * 2125 getTmpdir(void) 2126 { 2127 static char *tmpdir = NULL; 2128 struct stat st; 2129 2130 if (tmpdir != NULL) 2131 return tmpdir; 2132 2133 /* Honor $TMPDIR if it is valid, strip a trailing '/'. */ 2134 tmpdir = Var_Subst("${TMPDIR:tA:U" _PATH_TMP ":S,/$,,W}/", 2135 SCOPE_GLOBAL, VARE_WANTRES); 2136 /* TODO: handle errors */ 2137 2138 if (stat(tmpdir, &st) < 0 || !S_ISDIR(st.st_mode)) { 2139 free(tmpdir); 2140 tmpdir = bmake_strdup(_PATH_TMP); 2141 } 2142 return tmpdir; 2143 } 2144 2145 /* 2146 * Create and open a temp file using "pattern". 2147 * If tfile is provided, set it to a copy of the filename created. 2148 * Otherwise unlink the file once open. 2149 */ 2150 int 2151 mkTempFile(const char *pattern, char *tfile, size_t tfile_sz) 2152 { 2153 static char *tmpdir = NULL; 2154 char tbuf[MAXPATHLEN]; 2155 int fd; 2156 2157 if (pattern == NULL) 2158 pattern = TMPPAT; 2159 if (tmpdir == NULL) 2160 tmpdir = getTmpdir(); 2161 if (tfile == NULL) { 2162 tfile = tbuf; 2163 tfile_sz = sizeof tbuf; 2164 } 2165 2166 if (pattern[0] == '/') 2167 snprintf(tfile, tfile_sz, "%s", pattern); 2168 else 2169 snprintf(tfile, tfile_sz, "%s%s", tmpdir, pattern); 2170 2171 if ((fd = mkstemp(tfile)) < 0) 2172 Punt("Could not create temporary file %s: %s", tfile, 2173 strerror(errno)); 2174 if (tfile == tbuf) 2175 unlink(tfile); /* we just want the descriptor */ 2176 2177 return fd; 2178 } 2179 2180 /* 2181 * Convert a string representation of a boolean into a boolean value. 2182 * Anything that looks like "No", "False", "Off", "0" etc. is false, 2183 * the empty string is the fallback, everything else is true. 2184 */ 2185 bool 2186 ParseBoolean(const char *s, bool fallback) 2187 { 2188 char ch = ch_tolower(s[0]); 2189 if (ch == '\0') 2190 return fallback; 2191 if (ch == '0' || ch == 'f' || ch == 'n') 2192 return false; 2193 if (ch == 'o') 2194 return ch_tolower(s[1]) != 'f'; 2195 return true; 2196 } 2197
Indexes created Mon Sep 22 13:09:51 GMT 2025