main.c revision 1.615
1 /* $NetBSD: main.c,v 1.615 2024/05/07 18:26:22 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 1.615 2024/05/07 18:26:22 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 /* do NOT search .CURDIR first for .include <makefile> */ 1160 SearchPath_Add(defSysIncPath, ".DOTLAST"); 1161 for (start = syspath; *start != '\0'; start = p) { 1162 for (p = start; *p != '\0' && *p != ':'; p++) 1163 continue; 1164 if (*p == ':') 1165 *p++ = '\0'; 1166 1167 /* look for magic parent directory search string */ 1168 if (strncmp(start, ".../", 4) == 0) { 1169 char *dir = Dir_FindHereOrAbove(curdir, start + 4); 1170 if (dir != NULL) { 1171 (void)SearchPath_Add(defSysIncPath, dir); 1172 free(dir); 1173 } 1174 } else { 1175 (void)SearchPath_Add(defSysIncPath, start); 1176 } 1177 } 1178 1179 if (syspath != defsyspath) 1180 free(syspath); 1181 } 1182 1183 static void 1184 ReadBuiltinRules(void) 1185 { 1186 StringListNode *ln; 1187 StringList sysMkFiles = LST_INIT; 1188 1189 SearchPath_Expand( 1190 Lst_IsEmpty(&sysIncPath->dirs) ? defSysIncPath : sysIncPath, 1191 _PATH_DEFSYSMK, 1192 &sysMkFiles); 1193 if (Lst_IsEmpty(&sysMkFiles)) 1194 Fatal("%s: no system rules (%s).", progname, _PATH_DEFSYSMK); 1195 1196 for (ln = sysMkFiles.first; ln != NULL; ln = ln->next) 1197 if (ReadMakefile(ln->datum)) 1198 break; 1199 1200 if (ln == NULL) 1201 Fatal("%s: cannot open %s.", 1202 progname, (const char *)sysMkFiles.first->datum); 1203 1204 Lst_DoneFree(&sysMkFiles); 1205 } 1206 1207 static void 1208 InitMaxJobs(void) 1209 { 1210 char *value; 1211 int n; 1212 1213 if (forceJobs || opts.compatMake || 1214 !Var_Exists(SCOPE_GLOBAL, ".MAKE.JOBS")) 1215 return; 1216 1217 value = Var_Subst("${.MAKE.JOBS}", SCOPE_GLOBAL, VARE_WANTRES); 1218 /* TODO: handle errors */ 1219 n = (int)strtol(value, NULL, 0); 1220 if (n < 1) { 1221 (void)fprintf(stderr, 1222 "%s: illegal value for .MAKE.JOBS " 1223 "-- must be positive integer!\n", 1224 progname); 1225 exit(2); /* Not 1 so -q can distinguish error */ 1226 } 1227 1228 if (n != opts.maxJobs) { 1229 Global_Append(MAKEFLAGS, "-j"); 1230 Global_Append(MAKEFLAGS, value); 1231 } 1232 1233 opts.maxJobs = n; 1234 maxJobTokens = opts.maxJobs; 1235 forceJobs = true; 1236 free(value); 1237 } 1238 1239 /* 1240 * For compatibility, look at the directories in the VPATH variable 1241 * and add them to the search path, if the variable is defined. The 1242 * variable's value is in the same format as the PATH environment 1243 * variable, i.e. <directory>:<directory>:<directory>... 1244 */ 1245 static void 1246 InitVpath(void) 1247 { 1248 char *vpath, savec, *path; 1249 if (!Var_Exists(SCOPE_CMDLINE, "VPATH")) 1250 return; 1251 1252 vpath = Var_Subst("${VPATH}", SCOPE_CMDLINE, VARE_WANTRES); 1253 /* TODO: handle errors */ 1254 path = vpath; 1255 do { 1256 char *p; 1257 /* skip to end of directory */ 1258 for (p = path; *p != ':' && *p != '\0'; p++) 1259 continue; 1260 /* Save terminator character so know when to stop */ 1261 savec = *p; 1262 *p = '\0'; 1263 /* Add directory to search path */ 1264 (void)SearchPath_Add(&dirSearchPath, path); 1265 *p = savec; 1266 path = p + 1; 1267 } while (savec == ':'); 1268 free(vpath); 1269 } 1270 1271 static void 1272 ReadAllMakefiles(const StringList *makefiles) 1273 { 1274 StringListNode *ln; 1275 1276 for (ln = makefiles->first; ln != NULL; ln = ln->next) { 1277 const char *fname = ln->datum; 1278 if (!ReadMakefile(fname)) 1279 Fatal("%s: cannot open %s.", progname, fname); 1280 } 1281 } 1282 1283 static void 1284 ReadFirstDefaultMakefile(void) 1285 { 1286 StringList makefiles = LST_INIT; 1287 StringListNode *ln; 1288 char *prefs = Var_Subst("${.MAKE.MAKEFILE_PREFERENCE}", 1289 SCOPE_CMDLINE, VARE_WANTRES); 1290 /* TODO: handle errors */ 1291 1292 AppendWords(&makefiles, prefs); 1293 1294 for (ln = makefiles.first; ln != NULL; ln = ln->next) 1295 if (ReadMakefile(ln->datum)) 1296 break; 1297 1298 Lst_Done(&makefiles); 1299 free(prefs); 1300 } 1301 1302 /* 1303 * Initialize variables such as MAKE, MACHINE, .MAKEFLAGS. 1304 * Initialize a few modules. 1305 * Parse the arguments from MAKEFLAGS and the command line. 1306 */ 1307 static void 1308 main_Init(int argc, char **argv) 1309 { 1310 struct stat sa; 1311 const char *machine; 1312 const char *machine_arch; 1313 char *syspath = getenv("MAKESYSPATH"); 1314 struct utsname utsname; 1315 1316 /* default to writing debug to stderr */ 1317 opts.debug_file = stderr; 1318 1319 Str_Intern_Init(); 1320 HashTable_Init(&cached_realpaths); 1321 1322 #ifdef SIGINFO 1323 (void)bmake_signal(SIGINFO, siginfo); 1324 #endif 1325 1326 InitRandom(); 1327 1328 progname = str_basename(argv[0]); 1329 1330 UnlimitFiles(); 1331 1332 if (uname(&utsname) == -1) { 1333 (void)fprintf(stderr, "%s: uname failed (%s).\n", progname, 1334 strerror(errno)); 1335 exit(2); 1336 } 1337 1338 machine = InitVarMachine(&utsname); 1339 machine_arch = InitVarMachineArch(); 1340 1341 myPid = getpid(); /* remember this for vFork() */ 1342 1343 /* Just in case MAKEOBJDIR wants us to do something tricky. */ 1344 Targ_Init(); 1345 Var_Init(); 1346 Global_Set_ReadOnly(".MAKE.OS", utsname.sysname); 1347 Global_Set("MACHINE", machine); 1348 Global_Set("MACHINE_ARCH", machine_arch); 1349 #ifdef MAKE_VERSION 1350 Global_Set("MAKE_VERSION", MAKE_VERSION); 1351 #endif 1352 Global_Set_ReadOnly(".newline", "\n"); 1353 #ifndef MAKEFILE_PREFERENCE_LIST 1354 /* This is the traditional preference for makefiles. */ 1355 # define MAKEFILE_PREFERENCE_LIST "makefile Makefile" 1356 #endif 1357 Global_Set(".MAKE.MAKEFILE_PREFERENCE", MAKEFILE_PREFERENCE_LIST); 1358 Global_Set(".MAKE.DEPENDFILE", ".depend"); 1359 /* Tell makefiles like jobs.mk whether we support -jC */ 1360 #ifdef _SC_NPROCESSORS_ONLN 1361 Global_Set_ReadOnly(".MAKE.JOBS.C", "yes"); 1362 #else 1363 Global_Set_ReadOnly(".MAKE.JOBS.C", "no"); 1364 #endif 1365 1366 CmdOpts_Init(); 1367 allPrecious = false; /* Remove targets when interrupted */ 1368 deleteOnError = false; /* Historical default behavior */ 1369 jobsRunning = false; 1370 1371 maxJobTokens = opts.maxJobs; 1372 ignorePWD = false; 1373 1374 /* 1375 * Initialize the parsing, directory and variable modules to prepare 1376 * for the reading of inclusion paths and variable settings on the 1377 * command line 1378 */ 1379 1380 /* 1381 * Initialize various variables. 1382 * MAKE also gets this name, for compatibility 1383 * .MAKEFLAGS gets set to the empty string just in case. 1384 * MFLAGS also gets initialized empty, for compatibility. 1385 */ 1386 Parse_Init(); 1387 InitVarMake(argv[0]); 1388 Global_Set(MAKEFLAGS, ""); 1389 Global_Set(".MAKEOVERRIDES", ""); 1390 Global_Set("MFLAGS", ""); 1391 Global_Set(".ALLTARGETS", ""); 1392 Global_Set_ReadOnly(".MAKE.LEVEL.ENV", MAKE_LEVEL_ENV); 1393 1394 /* Set some other useful variables. */ 1395 { 1396 char buf[64], *ep = getenv(MAKE_LEVEL_ENV); 1397 1398 makelevel = ep != NULL && ep[0] != '\0' ? atoi(ep) : 0; 1399 if (makelevel < 0) 1400 makelevel = 0; 1401 snprintf(buf, sizeof buf, "%d", makelevel); 1402 Global_Set(".MAKE.LEVEL", buf); 1403 snprintf(buf, sizeof buf, "%u", myPid); 1404 Global_Set_ReadOnly(".MAKE.PID", buf); 1405 snprintf(buf, sizeof buf, "%u", getppid()); 1406 Global_Set_ReadOnly(".MAKE.PPID", buf); 1407 snprintf(buf, sizeof buf, "%u", getuid()); 1408 Global_Set_ReadOnly(".MAKE.UID", buf); 1409 snprintf(buf, sizeof buf, "%u", getgid()); 1410 Global_Set_ReadOnly(".MAKE.GID", buf); 1411 } 1412 if (makelevel > 0) { 1413 char pn[1024]; 1414 snprintf(pn, sizeof pn, "%s[%d]", progname, makelevel); 1415 progname = bmake_strdup(pn); 1416 } 1417 1418 #ifdef USE_META 1419 meta_init(); 1420 #endif 1421 Dir_Init(); 1422 1423 { 1424 char *makeflags = explode(getenv("MAKEFLAGS")); 1425 Main_ParseArgLine(makeflags); 1426 free(makeflags); 1427 } 1428 1429 if (getcwd(curdir, MAXPATHLEN) == NULL) { 1430 (void)fprintf(stderr, "%s: getcwd: %s.\n", 1431 progname, strerror(errno)); 1432 exit(2); 1433 } 1434 1435 MainParseArgs(argc, argv); 1436 1437 if (opts.enterFlag) 1438 printf("%s: Entering directory `%s'\n", progname, curdir); 1439 1440 if (stat(curdir, &sa) == -1) { 1441 (void)fprintf(stderr, "%s: %s: %s.\n", 1442 progname, curdir, strerror(errno)); 1443 exit(2); 1444 } 1445 1446 #ifndef NO_PWD_OVERRIDE 1447 HandlePWD(&sa); 1448 #endif 1449 Global_Set(".CURDIR", curdir); 1450 1451 InitObjdir(machine, machine_arch); 1452 1453 Arch_Init(); 1454 Suff_Init(); 1455 Trace_Init(tracefile); 1456 1457 defaultNode = NULL; 1458 (void)time(&now); 1459 1460 Trace_Log(MAKESTART, NULL); 1461 1462 InitVarTargets(); 1463 1464 InitDefSysIncPath(syspath); 1465 } 1466 1467 /* 1468 * Read the system makefile followed by either makefile, Makefile or the 1469 * files given by the -f option. Exit on parse errors. 1470 */ 1471 static void 1472 main_ReadFiles(void) 1473 { 1474 1475 if (Lst_IsEmpty(&sysIncPath->dirs)) 1476 SearchPath_AddAll(sysIncPath, defSysIncPath); 1477 1478 Dir_SetSYSPATH(); 1479 if (!opts.noBuiltins) 1480 ReadBuiltinRules(); 1481 1482 posix_state = PS_MAYBE_NEXT_LINE; 1483 if (!Lst_IsEmpty(&opts.makefiles)) 1484 ReadAllMakefiles(&opts.makefiles); 1485 else 1486 ReadFirstDefaultMakefile(); 1487 } 1488 1489 /* Compute the dependency graph. */ 1490 static void 1491 main_PrepareMaking(void) 1492 { 1493 /* In particular suppress .depend for '-r -V .OBJDIR -f /dev/null' */ 1494 if (!opts.noBuiltins || opts.printVars == PVM_NONE) { 1495 makeDependfile = Var_Subst("${.MAKE.DEPENDFILE}", 1496 SCOPE_CMDLINE, VARE_WANTRES); 1497 if (makeDependfile[0] != '\0') { 1498 /* TODO: handle errors */ 1499 doing_depend = true; 1500 (void)ReadMakefile(makeDependfile); 1501 doing_depend = false; 1502 } 1503 } 1504 1505 if (enterFlagObj) 1506 printf("%s: Entering directory `%s'\n", progname, objdir); 1507 1508 MakeMode(); 1509 1510 { 1511 FStr makeflags = Var_Value(SCOPE_GLOBAL, MAKEFLAGS); 1512 Global_Append("MFLAGS", makeflags.str); 1513 FStr_Done(&makeflags); 1514 } 1515 1516 InitMaxJobs(); 1517 1518 if (!opts.compatMake && !forceJobs) 1519 opts.compatMake = true; 1520 1521 if (!opts.compatMake) 1522 Job_ServerStart(maxJobTokens, jp_0, jp_1); 1523 DEBUG5(JOB, "job_pipe %d %d, maxjobs %d, tokens %d, compat %d\n", 1524 jp_0, jp_1, opts.maxJobs, maxJobTokens, opts.compatMake ? 1 : 0); 1525 1526 if (opts.printVars == PVM_NONE) 1527 Main_ExportMAKEFLAGS(true); /* initial export */ 1528 1529 InitVpath(); 1530 1531 /* 1532 * Now that all search paths have been read for suffixes et al, it's 1533 * time to add the default search path to their lists... 1534 */ 1535 Suff_ExtendPaths(); 1536 1537 /* 1538 * Propagate attributes through :: dependency lists. 1539 */ 1540 Targ_Propagate(); 1541 1542 /* print the initial graph, if the user requested it */ 1543 if (DEBUG(GRAPH1)) 1544 Targ_PrintGraph(1); 1545 } 1546 1547 /* 1548 * Make the targets. 1549 * If the -v or -V options are given, print variables instead. 1550 * Return whether any of the targets is out-of-date. 1551 */ 1552 static bool 1553 main_Run(void) 1554 { 1555 if (opts.printVars != PVM_NONE) { 1556 /* print the values of any variables requested by the user */ 1557 doPrintVars(); 1558 return false; 1559 } else { 1560 return runTargets(); 1561 } 1562 } 1563 1564 /* Clean up after making the targets. */ 1565 static void 1566 main_CleanUp(void) 1567 { 1568 #ifdef CLEANUP 1569 Lst_DoneFree(&opts.variables); 1570 Lst_DoneFree(&opts.makefiles); 1571 Lst_DoneFree(&opts.create); 1572 #endif 1573 1574 if (DEBUG(GRAPH2)) 1575 Targ_PrintGraph(2); 1576 1577 Trace_Log(MAKEEND, NULL); 1578 1579 if (enterFlagObj) 1580 printf("%s: Leaving directory `%s'\n", progname, objdir); 1581 if (opts.enterFlag) 1582 printf("%s: Leaving directory `%s'\n", progname, curdir); 1583 1584 #ifdef USE_META 1585 meta_finish(); 1586 #endif 1587 Suff_End(); 1588 Targ_End(); 1589 Arch_End(); 1590 Var_End(); 1591 Parse_End(); 1592 Dir_End(); 1593 Job_End(); 1594 Trace_End(); 1595 Str_Intern_End(); 1596 } 1597 1598 /* Determine the exit code. */ 1599 static int 1600 main_Exit(bool outOfDate) 1601 { 1602 if (opts.strict && (main_errors > 0 || Parse_NumErrors() > 0)) 1603 return 2; /* Not 1 so -q can distinguish error */ 1604 return outOfDate ? 1 : 0; 1605 } 1606 1607 int 1608 main(int argc, char **argv) 1609 { 1610 bool outOfDate; 1611 1612 main_Init(argc, argv); 1613 main_ReadFiles(); 1614 main_PrepareMaking(); 1615 outOfDate = main_Run(); 1616 main_CleanUp(); 1617 return main_Exit(outOfDate); 1618 } 1619 1620 /* 1621 * Open and parse the given makefile, with all its side effects. 1622 * Return false if the file could not be opened. 1623 */ 1624 static bool 1625 ReadMakefile(const char *fname) 1626 { 1627 int fd; 1628 char *name, *path = NULL; 1629 1630 if (strcmp(fname, "-") == 0) { 1631 Parse_File("(stdin)", -1); 1632 Var_Set(SCOPE_INTERNAL, "MAKEFILE", ""); 1633 } else { 1634 /* if we've chdir'd, rebuild the path name */ 1635 if (strcmp(curdir, objdir) != 0 && *fname != '/') { 1636 path = str_concat3(curdir, "/", fname); 1637 fd = open(path, O_RDONLY); 1638 if (fd != -1) { 1639 fname = path; 1640 goto found; 1641 } 1642 free(path); 1643 1644 /* If curdir failed, try objdir (ala .depend) */ 1645 path = str_concat3(objdir, "/", fname); 1646 fd = open(path, O_RDONLY); 1647 if (fd != -1) { 1648 fname = path; 1649 goto found; 1650 } 1651 } else { 1652 fd = open(fname, O_RDONLY); 1653 if (fd != -1) 1654 goto found; 1655 } 1656 /* look in -I and system include directories. */ 1657 name = Dir_FindFile(fname, parseIncPath); 1658 if (name == NULL) { 1659 SearchPath *sysInc = Lst_IsEmpty(&sysIncPath->dirs) 1660 ? defSysIncPath : sysIncPath; 1661 name = Dir_FindFile(fname, sysInc); 1662 } 1663 if (name == NULL || (fd = open(name, O_RDONLY)) == -1) { 1664 free(name); 1665 free(path); 1666 return false; 1667 } 1668 fname = name; 1669 /* 1670 * set the MAKEFILE variable desired by System V fans -- the 1671 * placement of the setting here means it gets set to the last 1672 * makefile specified, as it is set by SysV make. 1673 */ 1674 found: 1675 if (!doing_depend) 1676 Var_Set(SCOPE_INTERNAL, "MAKEFILE", fname); 1677 Parse_File(fname, fd); 1678 } 1679 free(path); 1680 return true; 1681 } 1682 1683 /* 1684 * Execute the command in cmd, and return its output (only stdout, not 1685 * stderr, possibly empty). In the output, replace newlines with spaces. 1686 */ 1687 char * 1688 Cmd_Exec(const char *cmd, char **error) 1689 { 1690 const char *args[4]; /* Arguments for invoking the shell */ 1691 int pipefds[2]; 1692 int cpid; /* Child PID */ 1693 int pid; /* PID from wait() */ 1694 int status; /* command exit status */ 1695 Buffer buf; /* buffer to store the result */ 1696 ssize_t bytes_read; 1697 char *output; 1698 char *p; 1699 int saved_errno; 1700 char cmd_file[MAXPATHLEN]; 1701 size_t cmd_len; 1702 int cmd_fd = -1; 1703 1704 if (shellPath == NULL) 1705 Shell_Init(); 1706 1707 cmd_len = strlen(cmd); 1708 if (cmd_len > 1000) { 1709 cmd_fd = mkTempFile(NULL, cmd_file, sizeof(cmd_file)); 1710 if (cmd_fd >= 0) { 1711 ssize_t n; 1712 1713 n = write(cmd_fd, cmd, cmd_len); 1714 close(cmd_fd); 1715 if (n < (ssize_t)cmd_len) { 1716 unlink(cmd_file); 1717 cmd_fd = -1; 1718 } 1719 } 1720 } 1721 1722 args[0] = shellName; 1723 if (cmd_fd >= 0) { 1724 args[1] = cmd_file; 1725 args[2] = NULL; 1726 } else { 1727 cmd_file[0] = '\0'; 1728 args[1] = "-c"; 1729 args[2] = cmd; 1730 args[3] = NULL; 1731 } 1732 DEBUG1(VAR, "Capturing the output of command \"%s\"\n", cmd); 1733 1734 if (pipe(pipefds) == -1) { 1735 *error = str_concat3( 1736 "Couldn't create pipe for \"", cmd, "\""); 1737 return bmake_strdup(""); 1738 } 1739 1740 Var_ReexportVars(SCOPE_GLOBAL); 1741 1742 switch (cpid = vfork()) { 1743 case 0: 1744 (void)close(pipefds[0]); 1745 (void)dup2(pipefds[1], STDOUT_FILENO); 1746 (void)close(pipefds[1]); 1747 1748 (void)execv(shellPath, UNCONST(args)); 1749 _exit(1); 1750 /* NOTREACHED */ 1751 1752 case -1: 1753 *error = str_concat3("Couldn't exec \"", cmd, "\""); 1754 return bmake_strdup(""); 1755 } 1756 1757 (void)close(pipefds[1]); /* No need for the writing half */ 1758 1759 saved_errno = 0; 1760 Buf_Init(&buf); 1761 1762 do { 1763 char result[BUFSIZ]; 1764 bytes_read = read(pipefds[0], result, sizeof result); 1765 if (bytes_read > 0) 1766 Buf_AddBytes(&buf, result, (size_t)bytes_read); 1767 } while (bytes_read > 0 || (bytes_read == -1 && errno == EINTR)); 1768 if (bytes_read == -1) 1769 saved_errno = errno; 1770 1771 (void)close(pipefds[0]); /* Close the input side of the pipe. */ 1772 1773 while ((pid = waitpid(cpid, &status, 0)) != cpid && pid >= 0) 1774 JobReapChild(pid, status, false); 1775 1776 if (Buf_EndsWith(&buf, '\n')) 1777 buf.data[buf.len - 1] = '\0'; 1778 1779 output = Buf_DoneData(&buf); 1780 for (p = output; *p != '\0'; p++) 1781 if (*p == '\n') 1782 *p = ' '; 1783 1784 if (WIFSIGNALED(status)) 1785 *error = str_concat3("\"", cmd, "\" exited on a signal"); 1786 else if (WEXITSTATUS(status) != 0) 1787 *error = str_concat3( 1788 "\"", cmd, "\" returned non-zero status"); 1789 else if (saved_errno != 0) 1790 *error = str_concat3( 1791 "Couldn't read shell's output for \"", cmd, "\""); 1792 else 1793 *error = NULL; 1794 if (cmd_file[0] != '\0') 1795 unlink(cmd_file); 1796 return output; 1797 } 1798 1799 /* 1800 * Print a printf-style error message. 1801 * 1802 * In default mode, this error message has no consequences, for compatibility 1803 * reasons, in particular it does not affect the exit status. Only in lint 1804 * mode (-dL) it does. 1805 */ 1806 void 1807 Error(const char *fmt, ...) 1808 { 1809 va_list ap; 1810 FILE *f; 1811 1812 f = opts.debug_file; 1813 if (f == stdout) 1814 f = stderr; 1815 (void)fflush(stdout); 1816 1817 for (;;) { 1818 fprintf(f, "%s: ", progname); 1819 va_start(ap, fmt); 1820 (void)vfprintf(f, fmt, ap); 1821 va_end(ap); 1822 (void)fprintf(f, "\n"); 1823 (void)fflush(f); 1824 if (f == stderr) 1825 break; 1826 f = stderr; 1827 } 1828 main_errors++; 1829 } 1830 1831 /* 1832 * Wait for any running jobs to finish, then produce an error message, 1833 * finally exit immediately. 1834 * 1835 * Exiting immediately differs from Parse_Error, which exits only after the 1836 * current top-level makefile has been parsed completely. 1837 */ 1838 void 1839 Fatal(const char *fmt, ...) 1840 { 1841 va_list ap; 1842 1843 if (jobsRunning) 1844 Job_Wait(); 1845 1846 (void)fflush(stdout); 1847 fprintf(stderr, "%s: ", progname); 1848 va_start(ap, fmt); 1849 (void)vfprintf(stderr, fmt, ap); 1850 va_end(ap); 1851 (void)fprintf(stderr, "\n"); 1852 (void)fflush(stderr); 1853 PrintStackTrace(true); 1854 1855 PrintOnError(NULL, "\n"); 1856 1857 if (DEBUG(GRAPH2) || DEBUG(GRAPH3)) 1858 Targ_PrintGraph(2); 1859 Trace_Log(MAKEERROR, NULL); 1860 exit(2); /* Not 1 so -q can distinguish error */ 1861 } 1862 1863 /* 1864 * Major exception once jobs are being created. 1865 * Kills all jobs, prints a message and exits. 1866 */ 1867 void 1868 Punt(const char *fmt, ...) 1869 { 1870 va_list ap; 1871 1872 (void)fflush(stdout); 1873 (void)fprintf(stderr, "%s: ", progname); 1874 va_start(ap, fmt); 1875 (void)vfprintf(stderr, fmt, ap); 1876 va_end(ap); 1877 (void)fprintf(stderr, "\n"); 1878 (void)fflush(stderr); 1879 1880 PrintOnError(NULL, "\n"); 1881 1882 DieHorribly(); 1883 } 1884 1885 /* Exit without giving a message. */ 1886 void 1887 DieHorribly(void) 1888 { 1889 if (jobsRunning) 1890 Job_AbortAll(); 1891 if (DEBUG(GRAPH2)) 1892 Targ_PrintGraph(2); 1893 Trace_Log(MAKEERROR, NULL); 1894 exit(2); /* Not 1 so -q can distinguish error */ 1895 } 1896 1897 /* 1898 * Called when aborting due to errors in child shell to signal abnormal exit. 1899 * The program exits. 1900 * Errors is the number of errors encountered in Make_Make. 1901 */ 1902 void 1903 Finish(int errs) 1904 { 1905 if (shouldDieQuietly(NULL, -1)) 1906 exit(2); 1907 Fatal("%d error%s", errs, errs == 1 ? "" : "s"); 1908 } 1909 1910 int 1911 unlink_file(const char *file) 1912 { 1913 struct stat st; 1914 1915 if (lstat(file, &st) == -1) 1916 return -1; 1917 1918 if (S_ISDIR(st.st_mode)) { 1919 /* 1920 * POSIX says for unlink: "The path argument shall not name 1921 * a directory unless [...]". 1922 */ 1923 errno = EISDIR; 1924 return -1; 1925 } 1926 return unlink(file); 1927 } 1928 1929 static void 1930 write_all(int fd, const void *data, size_t n) 1931 { 1932 const char *mem = data; 1933 1934 while (n > 0) { 1935 ssize_t written = write(fd, mem, n); 1936 /* XXX: Should this EAGAIN be EINTR? */ 1937 if (written == -1 && errno == EAGAIN) 1938 continue; 1939 if (written == -1) 1940 break; 1941 mem += written; 1942 n -= (size_t)written; 1943 } 1944 } 1945 1946 /* Print why exec failed, avoiding stdio. */ 1947 void MAKE_ATTR_DEAD 1948 execDie(const char *af, const char *av) 1949 { 1950 Buffer buf; 1951 1952 Buf_Init(&buf); 1953 Buf_AddStr(&buf, progname); 1954 Buf_AddStr(&buf, ": "); 1955 Buf_AddStr(&buf, af); 1956 Buf_AddStr(&buf, "("); 1957 Buf_AddStr(&buf, av); 1958 Buf_AddStr(&buf, ") failed ("); 1959 Buf_AddStr(&buf, strerror(errno)); 1960 Buf_AddStr(&buf, ")\n"); 1961 1962 write_all(STDERR_FILENO, buf.data, buf.len); 1963 1964 Buf_Done(&buf); 1965 _exit(1); 1966 } 1967 1968 static void 1969 purge_relative_cached_realpaths(void) 1970 { 1971 HashEntry *he, *next; 1972 HashIter hi; 1973 1974 HashIter_Init(&hi, &cached_realpaths); 1975 he = HashIter_Next(&hi); 1976 while (he != NULL) { 1977 next = HashIter_Next(&hi); 1978 if (he->key[0] != '/') { 1979 DEBUG1(DIR, "cached_realpath: purging %s\n", he->key); 1980 HashTable_DeleteEntry(&cached_realpaths, he); 1981 /* 1982 * XXX: What about the allocated he->value? Either 1983 * free them or document why they cannot be freed. 1984 */ 1985 } 1986 he = next; 1987 } 1988 } 1989 1990 const char * 1991 cached_realpath(const char *pathname, char *resolved) 1992 { 1993 const char *rp; 1994 1995 if (pathname == NULL || pathname[0] == '\0') 1996 return NULL; 1997 1998 rp = HashTable_FindValue(&cached_realpaths, pathname); 1999 if (rp != NULL) { 2000 /* a hit */ 2001 strncpy(resolved, rp, MAXPATHLEN); 2002 resolved[MAXPATHLEN - 1] = '\0'; 2003 return resolved; 2004 } 2005 2006 rp = realpath(pathname, resolved); 2007 if (rp != NULL) { 2008 HashTable_Set(&cached_realpaths, pathname, bmake_strdup(rp)); 2009 DEBUG2(DIR, "cached_realpath: %s -> %s\n", pathname, rp); 2010 return resolved; 2011 } 2012 2013 /* should we negative-cache? */ 2014 return NULL; 2015 } 2016 2017 /* 2018 * Return true if we should die without noise. 2019 * For example our failing child was a sub-make or failure happened elsewhere. 2020 */ 2021 bool 2022 shouldDieQuietly(GNode *gn, int bf) 2023 { 2024 static int quietly = -1; 2025 2026 if (quietly < 0) { 2027 if (DEBUG(JOB) || 2028 !GetBooleanExpr("${.MAKE.DIE_QUIETLY}", true)) 2029 quietly = 0; 2030 else if (bf >= 0) 2031 quietly = bf; 2032 else 2033 quietly = (gn != NULL && (gn->type & OP_MAKE)) ? 1 : 0; 2034 } 2035 return quietly != 0; 2036 } 2037 2038 static void 2039 SetErrorVars(GNode *gn) 2040 { 2041 StringListNode *ln; 2042 char sts[16]; 2043 2044 /* 2045 * We can print this even if there is no .ERROR target. 2046 */ 2047 snprintf(sts, sizeof(sts), "%d", gn->exit_status); 2048 Global_Set(".ERROR_EXIT", sts); 2049 Global_Set(".ERROR_TARGET", gn->name); 2050 Global_Delete(".ERROR_CMD"); 2051 2052 for (ln = gn->commands.first; ln != NULL; ln = ln->next) { 2053 const char *cmd = ln->datum; 2054 2055 if (cmd == NULL) 2056 break; 2057 Global_Append(".ERROR_CMD", cmd); 2058 } 2059 } 2060 2061 /* 2062 * Print some helpful information in case of an error. 2063 * The caller should exit soon after calling this function. 2064 */ 2065 void 2066 PrintOnError(GNode *gn, const char *msg) 2067 { 2068 static GNode *errorNode = NULL; 2069 2070 if (DEBUG(HASH)) { 2071 Targ_Stats(); 2072 Var_Stats(); 2073 } 2074 2075 if (errorNode != NULL) 2076 return; /* we've been here! */ 2077 2078 printf("%s%s: stopped in %s\n", msg, progname, curdir); 2079 2080 /* we generally want to keep quiet if a sub-make died */ 2081 if (shouldDieQuietly(gn, -1)) 2082 return; 2083 2084 if (gn != NULL) 2085 SetErrorVars(gn); 2086 2087 { 2088 char *errorVarsValues = Var_Subst( 2089 "${MAKE_PRINT_VAR_ON_ERROR:@v@$v='${$v}'\n@}", 2090 SCOPE_GLOBAL, VARE_WANTRES); 2091 /* TODO: handle errors */ 2092 printf("%s", errorVarsValues); 2093 free(errorVarsValues); 2094 } 2095 2096 fflush(stdout); 2097 2098 /* 2099 * Finally, see if there is a .ERROR target, and run it if so. 2100 */ 2101 errorNode = Targ_FindNode(".ERROR"); 2102 if (errorNode != NULL) { 2103 errorNode->type |= OP_SPECIAL; 2104 Compat_Make(errorNode, errorNode); 2105 } 2106 } 2107 2108 void 2109 Main_ExportMAKEFLAGS(bool first) 2110 { 2111 static bool once = true; 2112 char *flags; 2113 2114 if (once != first) 2115 return; 2116 once = false; 2117 2118 flags = Var_Subst( 2119 "${.MAKEFLAGS} ${.MAKEOVERRIDES:O:u:@v@$v=${$v:Q}@}", 2120 SCOPE_CMDLINE, VARE_WANTRES); 2121 /* TODO: handle errors */ 2122 if (flags[0] != '\0') 2123 setenv("MAKEFLAGS", flags, 1); 2124 } 2125 2126 char * 2127 getTmpdir(void) 2128 { 2129 static char *tmpdir = NULL; 2130 struct stat st; 2131 2132 if (tmpdir != NULL) 2133 return tmpdir; 2134 2135 /* Honor $TMPDIR if it is valid, strip a trailing '/'. */ 2136 tmpdir = Var_Subst("${TMPDIR:tA:U" _PATH_TMP ":S,/$,,W}/", 2137 SCOPE_GLOBAL, VARE_WANTRES); 2138 /* TODO: handle errors */ 2139 2140 if (stat(tmpdir, &st) < 0 || !S_ISDIR(st.st_mode)) { 2141 free(tmpdir); 2142 tmpdir = bmake_strdup(_PATH_TMP); 2143 } 2144 return tmpdir; 2145 } 2146 2147 /* 2148 * Create and open a temp file using "pattern". 2149 * If tfile is provided, set it to a copy of the filename created. 2150 * Otherwise unlink the file once open. 2151 */ 2152 int 2153 mkTempFile(const char *pattern, char *tfile, size_t tfile_sz) 2154 { 2155 static char *tmpdir = NULL; 2156 char tbuf[MAXPATHLEN]; 2157 int fd; 2158 2159 if (pattern == NULL) 2160 pattern = TMPPAT; 2161 if (tmpdir == NULL) 2162 tmpdir = getTmpdir(); 2163 if (tfile == NULL) { 2164 tfile = tbuf; 2165 tfile_sz = sizeof tbuf; 2166 } 2167 2168 if (pattern[0] == '/') 2169 snprintf(tfile, tfile_sz, "%s", pattern); 2170 else 2171 snprintf(tfile, tfile_sz, "%s%s", tmpdir, pattern); 2172 2173 if ((fd = mkstemp(tfile)) < 0) 2174 Punt("Could not create temporary file %s: %s", tfile, 2175 strerror(errno)); 2176 if (tfile == tbuf) 2177 unlink(tfile); /* we just want the descriptor */ 2178 2179 return fd; 2180 } 2181 2182 /* 2183 * Convert a string representation of a boolean into a boolean value. 2184 * Anything that looks like "No", "False", "Off", "0" etc. is false, 2185 * the empty string is the fallback, everything else is true. 2186 */ 2187 bool 2188 ParseBoolean(const char *s, bool fallback) 2189 { 2190 char ch = ch_tolower(s[0]); 2191 if (ch == '\0') 2192 return fallback; 2193 if (ch == '0' || ch == 'f' || ch == 'n') 2194 return false; 2195 if (ch == 'o') 2196 return ch_tolower(s[1]) != 'f'; 2197 return true; 2198 } 2199
Indexes created Mon Sep 22 13:09:51 GMT 2025