main.c revision 1.599
1 /* $NetBSD: main.c,v 1.599 2023/09/10 21:52:36 rillig 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 1.599 2023/09/10 21:52:36 rillig Exp $"); 115 #if defined(MAKE_NATIVE) && !defined(lint) 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 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", 226 fname); 227 exit(2); 228 } 229 free(fname); 230 } 231 232 static void 233 MainParseArgDebug(const char *argvalue) 234 { 235 const char *modules; 236 DebugFlags debug = opts.debug; 237 238 for (modules = argvalue; *modules != '\0'; modules++) { 239 switch (*modules) { 240 case '0': /* undocumented, only intended for tests */ 241 memset(&debug, 0, sizeof(debug)); 242 break; 243 case 'A': 244 memset(&debug, ~0, sizeof(debug)); 245 break; 246 case 'a': 247 debug.DEBUG_ARCH = true; 248 break; 249 case 'C': 250 debug.DEBUG_CWD = true; 251 break; 252 case 'c': 253 debug.DEBUG_COND = true; 254 break; 255 case 'd': 256 debug.DEBUG_DIR = true; 257 break; 258 case 'e': 259 debug.DEBUG_ERROR = true; 260 break; 261 case 'f': 262 debug.DEBUG_FOR = true; 263 break; 264 case 'g': 265 if (modules[1] == '1') { 266 debug.DEBUG_GRAPH1 = true; 267 modules++; 268 } else if (modules[1] == '2') { 269 debug.DEBUG_GRAPH2 = true; 270 modules++; 271 } else if (modules[1] == '3') { 272 debug.DEBUG_GRAPH3 = true; 273 modules++; 274 } 275 break; 276 case 'h': 277 debug.DEBUG_HASH = true; 278 break; 279 case 'j': 280 debug.DEBUG_JOB = true; 281 break; 282 case 'L': 283 opts.strict = true; 284 break; 285 case 'l': 286 debug.DEBUG_LOUD = true; 287 break; 288 case 'M': 289 debug.DEBUG_META = true; 290 break; 291 case 'm': 292 debug.DEBUG_MAKE = true; 293 break; 294 case 'n': 295 debug.DEBUG_SCRIPT = true; 296 break; 297 case 'p': 298 debug.DEBUG_PARSE = true; 299 break; 300 case 's': 301 debug.DEBUG_SUFF = true; 302 break; 303 case 't': 304 debug.DEBUG_TARG = true; 305 break; 306 case 'V': 307 opts.debugVflag = true; 308 break; 309 case 'v': 310 debug.DEBUG_VAR = true; 311 break; 312 case 'x': 313 debug.DEBUG_SHELL = true; 314 break; 315 case 'F': 316 MainParseArgDebugFile(modules + 1); 317 goto finish; 318 default: 319 (void)fprintf(stderr, 320 "%s: illegal argument to d option -- %c\n", 321 progname, *modules); 322 usage(); 323 } 324 } 325 326 finish: 327 opts.debug = debug; 328 329 setvbuf(opts.debug_file, NULL, _IONBF, 0); 330 if (opts.debug_file != stdout) 331 setvbuf(stdout, NULL, _IOLBF, 0); 332 } 333 334 /* Is path relative or does it contain any relative component "." or ".."? */ 335 static bool 336 IsRelativePath(const char *path) 337 { 338 const char *p; 339 340 if (path[0] != '/') 341 return true; 342 p = path; 343 while ((p = strstr(p, "/.")) != NULL) { 344 p += 2; 345 if (*p == '.') 346 p++; 347 if (*p == '/' || *p == '\0') 348 return true; 349 } 350 return false; 351 } 352 353 static void 354 MainParseArgChdir(const char *argvalue) 355 { 356 struct stat sa, sb; 357 358 if (chdir(argvalue) == -1) { 359 (void)fprintf(stderr, "%s: chdir %s: %s\n", 360 progname, argvalue, strerror(errno)); 361 exit(2); /* Not 1 so -q can distinguish error */ 362 } 363 if (getcwd(curdir, MAXPATHLEN) == NULL) { 364 (void)fprintf(stderr, "%s: %s.\n", progname, strerror(errno)); 365 exit(2); 366 } 367 if (!IsRelativePath(argvalue) && 368 stat(argvalue, &sa) != -1 && 369 stat(curdir, &sb) != -1 && 370 sa.st_ino == sb.st_ino && 371 sa.st_dev == sb.st_dev) 372 strncpy(curdir, argvalue, MAXPATHLEN); 373 ignorePWD = true; 374 } 375 376 static void 377 MainParseArgJobsInternal(const char *argvalue) 378 { 379 char end; 380 if (sscanf(argvalue, "%d,%d%c", &jp_0, &jp_1, &end) != 2) { 381 (void)fprintf(stderr, 382 "%s: internal error -- J option malformed (%s)\n", 383 progname, argvalue); 384 usage(); 385 } 386 if ((fcntl(jp_0, F_GETFD, 0) < 0) || 387 (fcntl(jp_1, F_GETFD, 0) < 0)) { 388 jp_0 = -1; 389 jp_1 = -1; 390 opts.compatMake = true; 391 } else { 392 Global_Append(MAKEFLAGS, "-J"); 393 Global_Append(MAKEFLAGS, argvalue); 394 } 395 } 396 397 static void 398 MainParseArgJobs(const char *arg) 399 { 400 const char *p; 401 char *end; 402 char v[12]; 403 404 forceJobs = true; 405 opts.maxJobs = (int)strtol(arg, &end, 0); 406 p = arg + (end - arg); 407 #ifdef _SC_NPROCESSORS_ONLN 408 if (*p != '\0') { 409 double d; 410 411 if (*p == 'C') { 412 d = (opts.maxJobs > 0) ? opts.maxJobs : 1; 413 } else if (*p == '.') { 414 d = strtod(arg, &end); 415 p = arg + (end - arg); 416 } else 417 d = 0; 418 if (d > 0) { 419 p = ""; 420 opts.maxJobs = (int)sysconf(_SC_NPROCESSORS_ONLN); 421 opts.maxJobs = (int)(d * (double)opts.maxJobs); 422 } 423 } 424 #endif 425 if (*p != '\0' || opts.maxJobs < 1) { 426 (void)fprintf(stderr, 427 "%s: argument '%s' to option '-j' " 428 "must be a positive number\n", 429 progname, arg); 430 exit(2); /* Not 1 so -q can distinguish error */ 431 } 432 snprintf(v, sizeof(v), "%d", opts.maxJobs); 433 Global_Append(MAKEFLAGS, "-j"); 434 Global_Append(MAKEFLAGS, v); 435 Global_Set(".MAKE.JOBS", v); 436 maxJobTokens = opts.maxJobs; 437 } 438 439 static void 440 MainParseArgSysInc(const char *argvalue) 441 { 442 /* look for magic parent directory search string */ 443 if (strncmp(".../", argvalue, 4) == 0) { 444 char *found_path = Dir_FindHereOrAbove(curdir, argvalue + 4); 445 if (found_path == NULL) 446 return; 447 (void)SearchPath_Add(sysIncPath, found_path); 448 free(found_path); 449 } else { 450 (void)SearchPath_Add(sysIncPath, argvalue); 451 } 452 Global_Append(MAKEFLAGS, "-m"); 453 Global_Append(MAKEFLAGS, argvalue); 454 Dir_SetSYSPATH(); 455 } 456 457 static bool 458 MainParseOption(char c, const char *argvalue) 459 { 460 switch (c) { 461 case '\0': 462 break; 463 case 'B': 464 opts.compatMake = true; 465 Global_Append(MAKEFLAGS, "-B"); 466 Global_Set(".MAKE.MODE", "compat"); 467 break; 468 case 'C': 469 MainParseArgChdir(argvalue); 470 break; 471 case 'D': 472 if (argvalue[0] == '\0') 473 return false; 474 Var_SetExpand(SCOPE_GLOBAL, argvalue, "1"); 475 Global_Append(MAKEFLAGS, "-D"); 476 Global_Append(MAKEFLAGS, argvalue); 477 break; 478 case 'I': 479 Parse_AddIncludeDir(argvalue); 480 Global_Append(MAKEFLAGS, "-I"); 481 Global_Append(MAKEFLAGS, argvalue); 482 break; 483 case 'J': 484 MainParseArgJobsInternal(argvalue); 485 break; 486 case 'N': 487 opts.noExecute = true; 488 opts.noRecursiveExecute = true; 489 Global_Append(MAKEFLAGS, "-N"); 490 break; 491 case 'S': 492 opts.keepgoing = false; 493 Global_Append(MAKEFLAGS, "-S"); 494 break; 495 case 'T': 496 tracefile = bmake_strdup(argvalue); 497 Global_Append(MAKEFLAGS, "-T"); 498 Global_Append(MAKEFLAGS, argvalue); 499 break; 500 case 'V': 501 case 'v': 502 opts.printVars = c == 'v' ? PVM_EXPANDED : PVM_UNEXPANDED; 503 Lst_Append(&opts.variables, bmake_strdup(argvalue)); 504 /* XXX: Why always -V? */ 505 Global_Append(MAKEFLAGS, "-V"); 506 Global_Append(MAKEFLAGS, argvalue); 507 break; 508 case 'W': 509 opts.parseWarnFatal = true; 510 /* XXX: why no Global_Append? */ 511 break; 512 case 'X': 513 opts.varNoExportEnv = true; 514 Global_Append(MAKEFLAGS, "-X"); 515 break; 516 case 'd': 517 /* If '-d-opts' don't pass to children */ 518 if (argvalue[0] == '-') 519 argvalue++; 520 else { 521 Global_Append(MAKEFLAGS, "-d"); 522 Global_Append(MAKEFLAGS, argvalue); 523 } 524 MainParseArgDebug(argvalue); 525 break; 526 case 'e': 527 opts.checkEnvFirst = true; 528 Global_Append(MAKEFLAGS, "-e"); 529 break; 530 case 'f': 531 Lst_Append(&opts.makefiles, bmake_strdup(argvalue)); 532 break; 533 case 'i': 534 opts.ignoreErrors = true; 535 Global_Append(MAKEFLAGS, "-i"); 536 break; 537 case 'j': 538 MainParseArgJobs(argvalue); 539 break; 540 case 'k': 541 opts.keepgoing = true; 542 Global_Append(MAKEFLAGS, "-k"); 543 break; 544 case 'm': 545 MainParseArgSysInc(argvalue); 546 /* XXX: why no Var_Append? */ 547 break; 548 case 'n': 549 opts.noExecute = true; 550 Global_Append(MAKEFLAGS, "-n"); 551 break; 552 case 'q': 553 opts.query = true; 554 /* Kind of nonsensical, wot? */ 555 Global_Append(MAKEFLAGS, "-q"); 556 break; 557 case 'r': 558 opts.noBuiltins = true; 559 Global_Append(MAKEFLAGS, "-r"); 560 break; 561 case 's': 562 opts.silent = true; 563 Global_Append(MAKEFLAGS, "-s"); 564 break; 565 case 't': 566 opts.touch = true; 567 Global_Append(MAKEFLAGS, "-t"); 568 break; 569 case 'w': 570 opts.enterFlag = true; 571 Global_Append(MAKEFLAGS, "-w"); 572 break; 573 default: 574 usage(); 575 } 576 return true; 577 } 578 579 /* 580 * Parse the given arguments. Called from main() and from 581 * Main_ParseArgLine() when the .MAKEFLAGS target is used. 582 * 583 * The arguments must be treated as read-only and will be freed after the 584 * call. 585 * 586 * XXX: Deal with command line overriding .MAKEFLAGS in makefile 587 */ 588 static void 589 MainParseArgs(int argc, char **argv) 590 { 591 char c; 592 int arginc; 593 char *argvalue; 594 char *optscan; 595 bool inOption, dashDash = false; 596 597 const char *optspecs = "BC:D:I:J:NST:V:WXd:ef:ij:km:nqrstv:w"; 598 /* Can't actually use getopt(3) because rescanning is not portable */ 599 600 rearg: 601 inOption = false; 602 optscan = NULL; 603 while (argc > 1) { 604 const char *optspec; 605 if (!inOption) 606 optscan = argv[1]; 607 c = *optscan++; 608 arginc = 0; 609 if (inOption) { 610 if (c == '\0') { 611 argv++; 612 argc--; 613 inOption = false; 614 continue; 615 } 616 } else { 617 if (c != '-' || dashDash) 618 break; 619 inOption = true; 620 c = *optscan++; 621 } 622 /* '-' found at some earlier point */ 623 optspec = strchr(optspecs, c); 624 if (c != '\0' && optspec != NULL && optspec[1] == ':') { 625 /* 626 * -<something> found, and <something> should have an 627 * argument 628 */ 629 inOption = false; 630 arginc = 1; 631 argvalue = optscan; 632 if (*argvalue == '\0') { 633 if (argc < 3) 634 goto noarg; 635 argvalue = argv[2]; 636 arginc = 2; 637 } 638 } else { 639 argvalue = NULL; 640 } 641 switch (c) { 642 case '\0': 643 arginc = 1; 644 inOption = false; 645 break; 646 case '-': 647 dashDash = true; 648 break; 649 default: 650 if (!MainParseOption(c, argvalue)) 651 goto noarg; 652 } 653 argv += arginc; 654 argc -= arginc; 655 } 656 657 /* 658 * See if the rest of the arguments are variable assignments and 659 * perform them if so. Else take them to be targets and stuff them 660 * on the end of the "create" list. 661 */ 662 for (; argc > 1; argv++, argc--) { 663 if (!Parse_VarAssign(argv[1], false, SCOPE_CMDLINE)) { 664 if (argv[1][0] == '\0') 665 Punt("illegal (null) argument."); 666 if (argv[1][0] == '-' && !dashDash) 667 goto rearg; 668 Lst_Append(&opts.create, bmake_strdup(argv[1])); 669 } 670 } 671 672 return; 673 noarg: 674 (void)fprintf(stderr, "%s: option requires an argument -- %c\n", 675 progname, c); 676 usage(); 677 } 678 679 /* 680 * Break a line of arguments into words and parse them. 681 * 682 * Used when a .MFLAGS or .MAKEFLAGS target is encountered during parsing and 683 * by main() when reading the MAKEFLAGS environment variable. 684 */ 685 void 686 Main_ParseArgLine(const char *line) 687 { 688 Words words; 689 char *buf; 690 691 if (line == NULL) 692 return; 693 /* XXX: don't use line as an iterator variable */ 694 for (; *line == ' '; line++) 695 continue; 696 if (line[0] == '\0') 697 return; 698 699 { 700 FStr argv0 = Var_Value(SCOPE_GLOBAL, ".MAKE"); 701 buf = str_concat3(argv0.str, " ", line); 702 FStr_Done(&argv0); 703 } 704 705 words = Str_Words(buf, true); 706 if (words.words == NULL) { 707 Error("Unterminated quoted string [%s]", buf); 708 free(buf); 709 return; 710 } 711 free(buf); 712 MainParseArgs((int)words.len, words.words); 713 714 Words_Free(words); 715 } 716 717 bool 718 Main_SetObjdir(bool writable, const char *fmt, ...) 719 { 720 struct stat sb; 721 char *path; 722 char buf[MAXPATHLEN + 1]; 723 char buf2[MAXPATHLEN + 1]; 724 va_list ap; 725 726 va_start(ap, fmt); 727 vsnprintf(path = buf, MAXPATHLEN, fmt, ap); 728 va_end(ap); 729 730 if (path[0] != '/') { 731 if (snprintf(buf2, MAXPATHLEN, "%s/%s", curdir, path) <= MAXPATHLEN) 732 path = buf2; 733 else 734 return false; 735 } 736 737 /* look for the directory and try to chdir there */ 738 if (stat(path, &sb) != 0 || !S_ISDIR(sb.st_mode)) 739 return false; 740 741 if ((writable && access(path, W_OK) != 0) || chdir(path) != 0) { 742 (void)fprintf(stderr, "%s: warning: %s: %s.\n", 743 progname, path, strerror(errno)); 744 return false; 745 } 746 747 snprintf(objdir, sizeof objdir, "%s", path); 748 Global_Set(".OBJDIR", objdir); 749 setenv("PWD", objdir, 1); 750 Dir_InitDot(); 751 purge_relative_cached_realpaths(); 752 if (opts.enterFlag && strcmp(objdir, curdir) != 0) 753 enterFlagObj = true; 754 return true; 755 } 756 757 static bool 758 SetVarObjdir(bool writable, const char *var, const char *suffix) 759 { 760 FStr path = Var_Value(SCOPE_CMDLINE, var); 761 762 if (path.str == NULL || path.str[0] == '\0') { 763 FStr_Done(&path); 764 return false; 765 } 766 767 Var_Expand(&path, SCOPE_GLOBAL, VARE_WANTRES); 768 769 (void)Main_SetObjdir(writable, "%s%s", path.str, suffix); 770 771 FStr_Done(&path); 772 return true; 773 } 774 775 /* 776 * Splits str into words, adding them to the list. 777 * The string must be kept alive as long as the list. 778 */ 779 int 780 str2Lst_Append(StringList *lp, char *str) 781 { 782 char *cp; 783 int n; 784 785 const char *sep = " \t"; 786 787 for (n = 0, cp = strtok(str, sep); cp != NULL; cp = strtok(NULL, sep)) { 788 Lst_Append(lp, cp); 789 n++; 790 } 791 return n; 792 } 793 794 #ifdef SIGINFO 795 /*ARGSUSED*/ 796 static void 797 siginfo(int signo MAKE_ATTR_UNUSED) 798 { 799 char dir[MAXPATHLEN]; 800 char str[2 * MAXPATHLEN]; 801 int len; 802 if (getcwd(dir, sizeof dir) == NULL) 803 return; 804 len = snprintf(str, sizeof str, "%s: Working in: %s\n", progname, dir); 805 if (len > 0) 806 (void)write(STDERR_FILENO, str, (size_t)len); 807 } 808 #endif 809 810 /* Allow makefiles some control over the mode we run in. */ 811 static void 812 MakeMode(void) 813 { 814 char *mode = Var_Subst("${.MAKE.MODE:tl}", 815 SCOPE_GLOBAL, VARE_WANTRES); 816 /* TODO: handle errors */ 817 818 if (mode[0] != '\0') { 819 if (strstr(mode, "compat") != NULL) { 820 opts.compatMake = true; 821 forceJobs = false; 822 } 823 #if USE_META 824 if (strstr(mode, "meta") != NULL) 825 meta_mode_init(mode); 826 #endif 827 if (strstr(mode, "randomize-targets") != NULL) 828 opts.randomizeTargets = true; 829 } 830 831 free(mode); 832 } 833 834 static void 835 PrintVar(const char *varname, bool expandVars) 836 { 837 if (strchr(varname, '$') != NULL) { 838 char *evalue = Var_Subst(varname, SCOPE_GLOBAL, VARE_WANTRES); 839 /* TODO: handle errors */ 840 printf("%s\n", evalue); 841 free(evalue); 842 843 } else if (expandVars) { 844 char *expr = str_concat3("${", varname, "}"); 845 char *evalue = Var_Subst(expr, SCOPE_GLOBAL, VARE_WANTRES); 846 /* TODO: handle errors */ 847 free(expr); 848 printf("%s\n", evalue); 849 free(evalue); 850 851 } else { 852 FStr value = Var_Value(SCOPE_GLOBAL, varname); 853 printf("%s\n", value.str != NULL ? value.str : ""); 854 FStr_Done(&value); 855 } 856 } 857 858 /* 859 * Return a bool based on a variable. 860 * 861 * If the knob is not set, return the fallback. 862 * If set, anything that looks or smells like "No", "False", "Off", "0", etc. 863 * is false, otherwise true. 864 */ 865 bool 866 GetBooleanExpr(const char *expr, bool fallback) 867 { 868 char *value; 869 bool res; 870 871 value = Var_Subst(expr, SCOPE_GLOBAL, VARE_WANTRES); 872 /* TODO: handle errors */ 873 res = ParseBoolean(value, fallback); 874 free(value); 875 return res; 876 } 877 878 static void 879 doPrintVars(void) 880 { 881 StringListNode *ln; 882 bool expandVars; 883 884 if (opts.printVars == PVM_EXPANDED) 885 expandVars = true; 886 else if (opts.debugVflag) 887 expandVars = false; 888 else 889 expandVars = GetBooleanExpr("${.MAKE.EXPAND_VARIABLES}", 890 false); 891 892 for (ln = opts.variables.first; ln != NULL; ln = ln->next) { 893 const char *varname = ln->datum; 894 PrintVar(varname, expandVars); 895 } 896 } 897 898 static bool 899 runTargets(void) 900 { 901 GNodeList targs = LST_INIT; /* target nodes to create */ 902 bool outOfDate; /* false if all targets up to date */ 903 904 /* 905 * Have now read the entire graph and need to make a list of 906 * targets to create. If none was given on the command line, 907 * we consult the parsing module to find the main target(s) 908 * to create. 909 */ 910 if (Lst_IsEmpty(&opts.create)) 911 Parse_MainName(&targs); 912 else 913 Targ_FindList(&targs, &opts.create); 914 915 if (!opts.compatMake) { 916 /* 917 * Initialize job module before traversing the graph 918 * now that any .BEGIN and .END targets have been read. 919 * This is done only if the -q flag wasn't given 920 * (to prevent the .BEGIN from being executed should 921 * it exist). 922 */ 923 if (!opts.query) { 924 Job_Init(); 925 jobsRunning = true; 926 } 927 928 /* Traverse the graph, checking on all the targets */ 929 outOfDate = Make_Run(&targs); 930 } else { 931 Compat_MakeAll(&targs); 932 outOfDate = false; 933 } 934 Lst_Done(&targs); /* Don't free the targets themselves. */ 935 return outOfDate; 936 } 937 938 /* 939 * Set up the .TARGETS variable to contain the list of targets to be created. 940 * If none specified, make the variable empty for now, the parser will fill 941 * in the default or .MAIN target later. 942 */ 943 static void 944 InitVarTargets(void) 945 { 946 StringListNode *ln; 947 948 if (Lst_IsEmpty(&opts.create)) { 949 Global_Set(".TARGETS", ""); 950 return; 951 } 952 953 for (ln = opts.create.first; ln != NULL; ln = ln->next) { 954 const char *name = ln->datum; 955 Global_Append(".TARGETS", name); 956 } 957 } 958 959 static void 960 InitRandom(void) 961 { 962 struct timeval tv; 963 964 gettimeofday(&tv, NULL); 965 srandom((unsigned int)(tv.tv_sec + tv.tv_usec)); 966 } 967 968 static const char * 969 InitVarMachine(const struct utsname *utsname MAKE_ATTR_UNUSED) 970 { 971 const char *machine = getenv("MACHINE"); 972 if (machine != NULL) 973 return machine; 974 975 #if defined(MAKE_NATIVE) 976 return utsname->machine; 977 #elif defined(MAKE_MACHINE) 978 return MAKE_MACHINE; 979 #else 980 return "unknown"; 981 #endif 982 } 983 984 static const char * 985 InitVarMachineArch(void) 986 { 987 const char *env = getenv("MACHINE_ARCH"); 988 if (env != NULL) 989 return env; 990 991 #ifdef MAKE_NATIVE 992 { 993 struct utsname utsname; 994 static char machine_arch_buf[sizeof utsname.machine]; 995 const int mib[2] = { CTL_HW, HW_MACHINE_ARCH }; 996 size_t len = sizeof machine_arch_buf; 997 998 if (sysctl(mib, (unsigned int)__arraycount(mib), 999 machine_arch_buf, &len, NULL, 0) < 0) { 1000 (void)fprintf(stderr, "%s: sysctl failed (%s).\n", 1001 progname, strerror(errno)); 1002 exit(2); 1003 } 1004 1005 return machine_arch_buf; 1006 } 1007 #elif defined(MACHINE_ARCH) 1008 return MACHINE_ARCH; 1009 #elif defined(MAKE_MACHINE_ARCH) 1010 return MAKE_MACHINE_ARCH; 1011 #else 1012 return "unknown"; 1013 #endif 1014 } 1015 1016 #ifndef NO_PWD_OVERRIDE 1017 /* 1018 * All this code is so that we know where we are when we start up 1019 * on a different machine with pmake. 1020 * 1021 * XXX: Make no longer has "local" and "remote" mode. Is this code still 1022 * necessary? 1023 * 1024 * Overriding getcwd() with $PWD totally breaks MAKEOBJDIRPREFIX 1025 * since the value of curdir can vary depending on how we got 1026 * here. Ie sitting at a shell prompt (shell that provides $PWD) 1027 * or via subdir.mk in which case its likely a shell which does 1028 * not provide it. 1029 * 1030 * So, to stop it breaking this case only, we ignore PWD if 1031 * MAKEOBJDIRPREFIX is set or MAKEOBJDIR contains a variable expression. 1032 */ 1033 static void 1034 HandlePWD(const struct stat *curdir_st) 1035 { 1036 char *pwd; 1037 FStr makeobjdir; 1038 struct stat pwd_st; 1039 1040 if (ignorePWD || (pwd = getenv("PWD")) == NULL) 1041 return; 1042 1043 if (Var_Exists(SCOPE_CMDLINE, "MAKEOBJDIRPREFIX")) 1044 return; 1045 1046 makeobjdir = Var_Value(SCOPE_CMDLINE, "MAKEOBJDIR"); 1047 if (makeobjdir.str != NULL && strchr(makeobjdir.str, '$') != NULL) 1048 goto ignore_pwd; 1049 1050 if (stat(pwd, &pwd_st) == 0 && 1051 curdir_st->st_ino == pwd_st.st_ino && 1052 curdir_st->st_dev == pwd_st.st_dev) 1053 (void)strncpy(curdir, pwd, MAXPATHLEN); 1054 1055 ignore_pwd: 1056 FStr_Done(&makeobjdir); 1057 } 1058 #endif 1059 1060 /* 1061 * Find the .OBJDIR. If MAKEOBJDIRPREFIX, or failing that, MAKEOBJDIR is set 1062 * in the environment, try only that value and fall back to .CURDIR if it 1063 * does not exist. 1064 * 1065 * Otherwise, try _PATH_OBJDIR.MACHINE-MACHINE_ARCH, _PATH_OBJDIR.MACHINE, 1066 * and finally _PATH_OBJDIRPREFIX`pwd`, in that order. If none of these 1067 * paths exist, just use .CURDIR. 1068 */ 1069 static void 1070 InitObjdir(const char *machine, const char *machine_arch) 1071 { 1072 bool writable; 1073 1074 Dir_InitCur(curdir); 1075 writable = GetBooleanExpr("${MAKE_OBJDIR_CHECK_WRITABLE}", true); 1076 (void)Main_SetObjdir(false, "%s", curdir); 1077 1078 if (!SetVarObjdir(writable, "MAKEOBJDIRPREFIX", curdir) && 1079 !SetVarObjdir(writable, "MAKEOBJDIR", "") && 1080 !Main_SetObjdir(writable, "%s.%s-%s", _PATH_OBJDIR, machine, machine_arch) && 1081 !Main_SetObjdir(writable, "%s.%s", _PATH_OBJDIR, machine) && 1082 !Main_SetObjdir(writable, "%s", _PATH_OBJDIR)) 1083 (void)Main_SetObjdir(writable, "%s%s", _PATH_OBJDIRPREFIX, curdir); 1084 } 1085 1086 /* get rid of resource limit on file descriptors */ 1087 static void 1088 UnlimitFiles(void) 1089 { 1090 #if defined(MAKE_NATIVE) || (defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE)) 1091 struct rlimit rl; 1092 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 && 1093 rl.rlim_cur != rl.rlim_max) { 1094 rl.rlim_cur = rl.rlim_max; 1095 (void)setrlimit(RLIMIT_NOFILE, &rl); 1096 } 1097 #endif 1098 } 1099 1100 static void 1101 CmdOpts_Init(void) 1102 { 1103 opts.compatMake = false; 1104 memset(&opts.debug, 0, sizeof(opts.debug)); 1105 /* opts.debug_file has already been initialized earlier */ 1106 opts.strict = false; 1107 opts.debugVflag = false; 1108 opts.checkEnvFirst = false; 1109 Lst_Init(&opts.makefiles); 1110 opts.ignoreErrors = false; /* Pay attention to non-zero returns */ 1111 opts.maxJobs = 1; 1112 opts.keepgoing = false; /* Stop on error */ 1113 opts.noRecursiveExecute = false; /* Execute all .MAKE targets */ 1114 opts.noExecute = false; /* Execute all commands */ 1115 opts.query = false; 1116 opts.noBuiltins = false; /* Read the built-in rules */ 1117 opts.silent = false; /* Print commands as executed */ 1118 opts.touch = false; 1119 opts.printVars = PVM_NONE; 1120 Lst_Init(&opts.variables); 1121 opts.parseWarnFatal = false; 1122 opts.enterFlag = false; 1123 opts.varNoExportEnv = false; 1124 Lst_Init(&opts.create); 1125 } 1126 1127 /* 1128 * Initialize MAKE and .MAKE to the path of the executable, so that it can be 1129 * found by execvp(3) and the shells, even after a chdir. 1130 * 1131 * If it's a relative path and contains a '/', resolve it to an absolute path. 1132 * Otherwise keep it as is, assuming it will be found in the PATH. 1133 */ 1134 static void 1135 InitVarMake(const char *argv0) 1136 { 1137 const char *make = argv0; 1138 1139 if (argv0[0] != '/' && strchr(argv0, '/') != NULL) { 1140 char pathbuf[MAXPATHLEN]; 1141 const char *abspath = cached_realpath(argv0, pathbuf); 1142 struct stat st; 1143 if (abspath != NULL && abspath[0] == '/' && 1144 stat(make, &st) == 0) 1145 make = abspath; 1146 } 1147 1148 Global_Set("MAKE", make); 1149 Global_Set(".MAKE", make); 1150 } 1151 1152 /* 1153 * Add the directories from the colon-separated syspath to defSysIncPath. 1154 * After returning, the contents of syspath is unspecified. 1155 */ 1156 static void 1157 InitDefSysIncPath(char *syspath) 1158 { 1159 static char defsyspath[] = _PATH_DEFSYSPATH; 1160 char *start, *cp; 1161 1162 /* 1163 * If no user-supplied system path was given (through the -m option) 1164 * add the directories from the DEFSYSPATH (more than one may be given 1165 * as dir1:...:dirn) to the system include path. 1166 */ 1167 if (syspath == NULL || syspath[0] == '\0') 1168 syspath = defsyspath; 1169 else 1170 syspath = bmake_strdup(syspath); 1171 1172 for (start = syspath; *start != '\0'; start = cp) { 1173 for (cp = start; *cp != '\0' && *cp != ':'; cp++) 1174 continue; 1175 if (*cp == ':') 1176 *cp++ = '\0'; 1177 1178 /* look for magic parent directory search string */ 1179 if (strncmp(start, ".../", 4) == 0) { 1180 char *dir = Dir_FindHereOrAbove(curdir, start + 4); 1181 if (dir != NULL) { 1182 (void)SearchPath_Add(defSysIncPath, dir); 1183 free(dir); 1184 } 1185 } else { 1186 (void)SearchPath_Add(defSysIncPath, start); 1187 } 1188 } 1189 1190 if (syspath != defsyspath) 1191 free(syspath); 1192 } 1193 1194 static void 1195 ReadBuiltinRules(void) 1196 { 1197 StringListNode *ln; 1198 StringList sysMkFiles = LST_INIT; 1199 1200 SearchPath_Expand( 1201 Lst_IsEmpty(&sysIncPath->dirs) ? defSysIncPath : sysIncPath, 1202 _PATH_DEFSYSMK, 1203 &sysMkFiles); 1204 if (Lst_IsEmpty(&sysMkFiles)) 1205 Fatal("%s: no system rules (%s).", progname, _PATH_DEFSYSMK); 1206 1207 for (ln = sysMkFiles.first; ln != NULL; ln = ln->next) 1208 if (ReadMakefile(ln->datum)) 1209 break; 1210 1211 if (ln == NULL) 1212 Fatal("%s: cannot open %s.", 1213 progname, (const char *)sysMkFiles.first->datum); 1214 1215 Lst_DoneCall(&sysMkFiles, free); 1216 } 1217 1218 static void 1219 InitMaxJobs(void) 1220 { 1221 char *value; 1222 int n; 1223 1224 if (forceJobs || opts.compatMake || 1225 !Var_Exists(SCOPE_GLOBAL, ".MAKE.JOBS")) 1226 return; 1227 1228 value = Var_Subst("${.MAKE.JOBS}", SCOPE_GLOBAL, VARE_WANTRES); 1229 /* TODO: handle errors */ 1230 n = (int)strtol(value, NULL, 0); 1231 if (n < 1) { 1232 (void)fprintf(stderr, 1233 "%s: illegal value for .MAKE.JOBS " 1234 "-- must be positive integer!\n", 1235 progname); 1236 exit(2); /* Not 1 so -q can distinguish error */ 1237 } 1238 1239 if (n != opts.maxJobs) { 1240 Global_Append(MAKEFLAGS, "-j"); 1241 Global_Append(MAKEFLAGS, value); 1242 } 1243 1244 opts.maxJobs = n; 1245 maxJobTokens = opts.maxJobs; 1246 forceJobs = true; 1247 free(value); 1248 } 1249 1250 /* 1251 * For compatibility, look at the directories in the VPATH variable 1252 * and add them to the search path, if the variable is defined. The 1253 * variable's value is in the same format as the PATH environment 1254 * variable, i.e. <directory>:<directory>:<directory>... 1255 */ 1256 static void 1257 InitVpath(void) 1258 { 1259 char *vpath, savec, *path; 1260 if (!Var_Exists(SCOPE_CMDLINE, "VPATH")) 1261 return; 1262 1263 vpath = Var_Subst("${VPATH}", SCOPE_CMDLINE, VARE_WANTRES); 1264 /* TODO: handle errors */ 1265 path = vpath; 1266 do { 1267 char *cp; 1268 /* skip to end of directory */ 1269 for (cp = path; *cp != ':' && *cp != '\0'; cp++) 1270 continue; 1271 /* Save terminator character so know when to stop */ 1272 savec = *cp; 1273 *cp = '\0'; 1274 /* Add directory to search path */ 1275 (void)SearchPath_Add(&dirSearchPath, path); 1276 *cp = savec; 1277 path = cp + 1; 1278 } while (savec == ':'); 1279 free(vpath); 1280 } 1281 1282 static void 1283 ReadAllMakefiles(const StringList *makefiles) 1284 { 1285 StringListNode *ln; 1286 1287 for (ln = makefiles->first; ln != NULL; ln = ln->next) { 1288 const char *fname = ln->datum; 1289 if (!ReadMakefile(fname)) 1290 Fatal("%s: cannot open %s.", progname, fname); 1291 } 1292 } 1293 1294 static void 1295 ReadFirstDefaultMakefile(void) 1296 { 1297 StringList makefiles = LST_INIT; 1298 StringListNode *ln; 1299 char *prefs = Var_Subst("${.MAKE.MAKEFILE_PREFERENCE}", 1300 SCOPE_CMDLINE, VARE_WANTRES); 1301 /* TODO: handle errors */ 1302 1303 (void)str2Lst_Append(&makefiles, prefs); 1304 1305 for (ln = makefiles.first; ln != NULL; ln = ln->next) 1306 if (ReadMakefile(ln->datum)) 1307 break; 1308 1309 Lst_Done(&makefiles); 1310 free(prefs); 1311 } 1312 1313 /* 1314 * Initialize variables such as MAKE, MACHINE, .MAKEFLAGS. 1315 * Initialize a few modules. 1316 * Parse the arguments from MAKEFLAGS and the command line. 1317 */ 1318 static void 1319 main_Init(int argc, char **argv) 1320 { 1321 struct stat sa; 1322 const char *machine; 1323 const char *machine_arch; 1324 char *syspath = getenv("MAKESYSPATH"); 1325 struct utsname utsname; 1326 1327 /* default to writing debug to stderr */ 1328 opts.debug_file = stderr; 1329 1330 Str_Intern_Init(); 1331 HashTable_Init(&cached_realpaths); 1332 1333 #ifdef SIGINFO 1334 (void)bmake_signal(SIGINFO, siginfo); 1335 #endif 1336 1337 InitRandom(); 1338 1339 progname = str_basename(argv[0]); 1340 1341 UnlimitFiles(); 1342 1343 if (uname(&utsname) == -1) { 1344 (void)fprintf(stderr, "%s: uname failed (%s).\n", progname, 1345 strerror(errno)); 1346 exit(2); 1347 } 1348 1349 /* 1350 * Get the name of this type of MACHINE from utsname 1351 * so we can share an executable for similar machines. 1352 * (i.e. m68k: amiga hp300, mac68k, sun3, ...) 1353 * 1354 * Note that both MACHINE and MACHINE_ARCH are decided at 1355 * run-time. 1356 */ 1357 machine = InitVarMachine(&utsname); 1358 machine_arch = InitVarMachineArch(); 1359 1360 myPid = getpid(); /* remember this for vFork() */ 1361 1362 /* 1363 * Just in case MAKEOBJDIR wants us to do something tricky. 1364 */ 1365 Targ_Init(); 1366 Var_Init(); 1367 Global_Set_ReadOnly(".MAKE.OS", utsname.sysname); 1368 Global_Set("MACHINE", machine); 1369 Global_Set("MACHINE_ARCH", machine_arch); 1370 #ifdef MAKE_VERSION 1371 Global_Set("MAKE_VERSION", MAKE_VERSION); 1372 #endif 1373 Global_Set_ReadOnly(".newline", "\n"); /* handy for :@ loops */ 1374 #ifndef MAKEFILE_PREFERENCE_LIST 1375 /* This is the traditional preference for makefiles. */ 1376 # define MAKEFILE_PREFERENCE_LIST "makefile Makefile" 1377 #endif 1378 Global_Set(".MAKE.MAKEFILE_PREFERENCE", MAKEFILE_PREFERENCE_LIST); 1379 Global_Set(".MAKE.DEPENDFILE", ".depend"); 1380 /* Tell makefiles like jobs.mk whether we support -jC */ 1381 #ifdef _SC_NPROCESSORS_ONLN 1382 Global_Set_ReadOnly(".MAKE.JOBS.C", "yes"); 1383 #else 1384 Global_Set_ReadOnly(".MAKE.JOBS.C", "no"); 1385 #endif 1386 1387 CmdOpts_Init(); 1388 allPrecious = false; /* Remove targets when interrupted */ 1389 deleteOnError = false; /* Historical default behavior */ 1390 jobsRunning = false; 1391 1392 maxJobTokens = opts.maxJobs; 1393 ignorePWD = false; 1394 1395 /* 1396 * Initialize the parsing, directory and variable modules to prepare 1397 * for the reading of inclusion paths and variable settings on the 1398 * command line 1399 */ 1400 1401 /* 1402 * Initialize various variables. 1403 * MAKE also gets this name, for compatibility 1404 * .MAKEFLAGS gets set to the empty string just in case. 1405 * MFLAGS also gets initialized empty, for compatibility. 1406 */ 1407 Parse_Init(); 1408 InitVarMake(argv[0]); 1409 Global_Set(MAKEFLAGS, ""); 1410 Global_Set(".MAKEOVERRIDES", ""); 1411 Global_Set("MFLAGS", ""); 1412 Global_Set(".ALLTARGETS", ""); 1413 Var_Set(SCOPE_CMDLINE, ".MAKE.LEVEL.ENV", MAKE_LEVEL_ENV); 1414 1415 /* Set some other useful variables. */ 1416 { 1417 char buf[64], *ep = getenv(MAKE_LEVEL_ENV); 1418 1419 makelevel = ep != NULL && ep[0] != '\0' ? atoi(ep) : 0; 1420 if (makelevel < 0) 1421 makelevel = 0; 1422 snprintf(buf, sizeof buf, "%d", makelevel); 1423 Global_Set(".MAKE.LEVEL", buf); 1424 snprintf(buf, sizeof buf, "%u", myPid); 1425 Global_Set_ReadOnly(".MAKE.PID", buf); 1426 snprintf(buf, sizeof buf, "%u", getppid()); 1427 Global_Set_ReadOnly(".MAKE.PPID", buf); 1428 snprintf(buf, sizeof buf, "%u", getuid()); 1429 Global_Set_ReadOnly(".MAKE.UID", buf); 1430 snprintf(buf, sizeof buf, "%u", getgid()); 1431 Global_Set_ReadOnly(".MAKE.GID", buf); 1432 } 1433 if (makelevel > 0) { 1434 char pn[1024]; 1435 snprintf(pn, sizeof pn, "%s[%d]", progname, makelevel); 1436 progname = bmake_strdup(pn); 1437 } 1438 1439 #ifdef USE_META 1440 meta_init(); 1441 #endif 1442 Dir_Init(); 1443 1444 #ifdef POSIX 1445 { 1446 char *makeflags = explode(getenv("MAKEFLAGS")); 1447 Main_ParseArgLine(makeflags); 1448 free(makeflags); 1449 } 1450 #else 1451 /* 1452 * First snag any flags out of the MAKE environment variable. 1453 * (Note this is *not* MAKEFLAGS since /bin/make uses that and it's 1454 * in a different format). 1455 */ 1456 Main_ParseArgLine(getenv("MAKE")); 1457 #endif 1458 1459 if (getcwd(curdir, MAXPATHLEN) == NULL) { 1460 (void)fprintf(stderr, "%s: getcwd: %s.\n", 1461 progname, strerror(errno)); 1462 exit(2); 1463 } 1464 1465 MainParseArgs(argc, argv); 1466 1467 if (opts.enterFlag) 1468 printf("%s: Entering directory `%s'\n", progname, curdir); 1469 1470 if (stat(curdir, &sa) == -1) { 1471 (void)fprintf(stderr, "%s: %s: %s.\n", 1472 progname, curdir, strerror(errno)); 1473 exit(2); 1474 } 1475 1476 #ifndef NO_PWD_OVERRIDE 1477 HandlePWD(&sa); 1478 #endif 1479 Global_Set(".CURDIR", curdir); 1480 1481 InitObjdir(machine, machine_arch); 1482 1483 Arch_Init(); 1484 Suff_Init(); 1485 Trace_Init(tracefile); 1486 1487 defaultNode = NULL; 1488 (void)time(&now); 1489 1490 Trace_Log(MAKESTART, NULL); 1491 1492 InitVarTargets(); 1493 1494 InitDefSysIncPath(syspath); 1495 } 1496 1497 /* 1498 * Read the system makefile followed by either makefile, Makefile or the 1499 * files given by the -f option. Exit on parse errors. 1500 */ 1501 static void 1502 main_ReadFiles(void) 1503 { 1504 1505 if (Lst_IsEmpty(&sysIncPath->dirs)) 1506 SearchPath_AddAll(sysIncPath, defSysIncPath); 1507 1508 Dir_SetSYSPATH(); 1509 if (!opts.noBuiltins) 1510 ReadBuiltinRules(); 1511 1512 posix_state = PS_MAYBE_NEXT_LINE; 1513 if (!Lst_IsEmpty(&opts.makefiles)) 1514 ReadAllMakefiles(&opts.makefiles); 1515 else 1516 ReadFirstDefaultMakefile(); 1517 } 1518 1519 /* Compute the dependency graph. */ 1520 static void 1521 main_PrepareMaking(void) 1522 { 1523 /* In particular suppress .depend for '-r -V .OBJDIR -f /dev/null' */ 1524 if (!opts.noBuiltins || opts.printVars == PVM_NONE) { 1525 makeDependfile = Var_Subst("${.MAKE.DEPENDFILE}", 1526 SCOPE_CMDLINE, VARE_WANTRES); 1527 if (makeDependfile[0] != '\0') { 1528 /* TODO: handle errors */ 1529 doing_depend = true; 1530 (void)ReadMakefile(makeDependfile); 1531 doing_depend = false; 1532 } 1533 } 1534 1535 if (enterFlagObj) 1536 printf("%s: Entering directory `%s'\n", progname, objdir); 1537 1538 MakeMode(); 1539 1540 { 1541 FStr makeflags = Var_Value(SCOPE_GLOBAL, MAKEFLAGS); 1542 Global_Append("MFLAGS", makeflags.str); 1543 FStr_Done(&makeflags); 1544 } 1545 1546 InitMaxJobs(); 1547 1548 if (!opts.compatMake && !forceJobs) 1549 opts.compatMake = true; 1550 1551 if (!opts.compatMake) 1552 Job_ServerStart(maxJobTokens, jp_0, jp_1); 1553 DEBUG5(JOB, "job_pipe %d %d, maxjobs %d, tokens %d, compat %d\n", 1554 jp_0, jp_1, opts.maxJobs, maxJobTokens, opts.compatMake ? 1 : 0); 1555 1556 if (opts.printVars == PVM_NONE) 1557 Main_ExportMAKEFLAGS(true); /* initial export */ 1558 1559 InitVpath(); 1560 1561 /* 1562 * Now that all search paths have been read for suffixes et al, it's 1563 * time to add the default search path to their lists... 1564 */ 1565 Suff_ExtendPaths(); 1566 1567 /* 1568 * Propagate attributes through :: dependency lists. 1569 */ 1570 Targ_Propagate(); 1571 1572 /* print the initial graph, if the user requested it */ 1573 if (DEBUG(GRAPH1)) 1574 Targ_PrintGraph(1); 1575 } 1576 1577 /* 1578 * Make the targets. 1579 * If the -v or -V options are given, print variables instead. 1580 * Return whether any of the targets is out-of-date. 1581 */ 1582 static bool 1583 main_Run(void) 1584 { 1585 if (opts.printVars != PVM_NONE) { 1586 /* print the values of any variables requested by the user */ 1587 doPrintVars(); 1588 return false; 1589 } else { 1590 return runTargets(); 1591 } 1592 } 1593 1594 /* Clean up after making the targets. */ 1595 static void 1596 main_CleanUp(void) 1597 { 1598 #ifdef CLEANUP 1599 Lst_DoneCall(&opts.variables, free); 1600 Lst_DoneCall(&opts.makefiles, free); 1601 Lst_DoneCall(&opts.create, free); 1602 #endif 1603 1604 if (DEBUG(GRAPH2)) 1605 Targ_PrintGraph(2); 1606 1607 Trace_Log(MAKEEND, NULL); 1608 1609 if (enterFlagObj) 1610 printf("%s: Leaving directory `%s'\n", progname, objdir); 1611 if (opts.enterFlag) 1612 printf("%s: Leaving directory `%s'\n", progname, curdir); 1613 1614 #ifdef USE_META 1615 meta_finish(); 1616 #endif 1617 Suff_End(); 1618 Targ_End(); 1619 Arch_End(); 1620 Var_End(); 1621 Parse_End(); 1622 Dir_End(); 1623 Job_End(); 1624 Trace_End(); 1625 Str_Intern_End(); 1626 } 1627 1628 /* Determine the exit code. */ 1629 static int 1630 main_Exit(bool outOfDate) 1631 { 1632 if (opts.strict && (main_errors > 0 || Parse_NumErrors() > 0)) 1633 return 2; /* Not 1 so -q can distinguish error */ 1634 return outOfDate ? 1 : 0; 1635 } 1636 1637 int 1638 main(int argc, char **argv) 1639 { 1640 bool outOfDate; 1641 1642 main_Init(argc, argv); 1643 main_ReadFiles(); 1644 main_PrepareMaking(); 1645 outOfDate = main_Run(); 1646 main_CleanUp(); 1647 return main_Exit(outOfDate); 1648 } 1649 1650 /* 1651 * Open and parse the given makefile, with all its side effects. 1652 * Return false if the file could not be opened. 1653 */ 1654 static bool 1655 ReadMakefile(const char *fname) 1656 { 1657 int fd; 1658 char *name, *path = NULL; 1659 1660 if (strcmp(fname, "-") == 0) { 1661 Parse_File("(stdin)", -1); 1662 Var_Set(SCOPE_INTERNAL, "MAKEFILE", ""); 1663 } else { 1664 /* if we've chdir'd, rebuild the path name */ 1665 if (strcmp(curdir, objdir) != 0 && *fname != '/') { 1666 path = str_concat3(curdir, "/", fname); 1667 fd = open(path, O_RDONLY); 1668 if (fd != -1) { 1669 fname = path; 1670 goto found; 1671 } 1672 free(path); 1673 1674 /* If curdir failed, try objdir (ala .depend) */ 1675 path = str_concat3(objdir, "/", fname); 1676 fd = open(path, O_RDONLY); 1677 if (fd != -1) { 1678 fname = path; 1679 goto found; 1680 } 1681 } else { 1682 fd = open(fname, O_RDONLY); 1683 if (fd != -1) 1684 goto found; 1685 } 1686 /* look in -I and system include directories. */ 1687 name = Dir_FindFile(fname, parseIncPath); 1688 if (name == NULL) { 1689 SearchPath *sysInc = Lst_IsEmpty(&sysIncPath->dirs) 1690 ? defSysIncPath : sysIncPath; 1691 name = Dir_FindFile(fname, sysInc); 1692 } 1693 if (name == NULL || (fd = open(name, O_RDONLY)) == -1) { 1694 free(name); 1695 free(path); 1696 return false; 1697 } 1698 fname = name; 1699 /* 1700 * set the MAKEFILE variable desired by System V fans -- the 1701 * placement of the setting here means it gets set to the last 1702 * makefile specified, as it is set by SysV make. 1703 */ 1704 found: 1705 if (!doing_depend) 1706 Var_Set(SCOPE_INTERNAL, "MAKEFILE", fname); 1707 Parse_File(fname, fd); 1708 } 1709 free(path); 1710 return true; 1711 } 1712 1713 /* 1714 * Execute the command in cmd, and return its output (only stdout, not 1715 * stderr, possibly empty). In the output, replace newlines with spaces. 1716 */ 1717 char * 1718 Cmd_Exec(const char *cmd, char **error) 1719 { 1720 const char *args[4]; /* Arguments for invoking the shell */ 1721 int pipefds[2]; 1722 int cpid; /* Child PID */ 1723 int pid; /* PID from wait() */ 1724 int status; /* command exit status */ 1725 Buffer buf; /* buffer to store the result */ 1726 ssize_t bytes_read; 1727 char *output; 1728 char *cp; 1729 int saved_errno; 1730 1731 if (shellName == NULL) 1732 Shell_Init(); 1733 1734 args[0] = shellName; 1735 args[1] = "-c"; 1736 args[2] = cmd; 1737 args[3] = NULL; 1738 DEBUG1(VAR, "Capturing the output of command \"%s\"\n", cmd); 1739 1740 if (pipe(pipefds) == -1) { 1741 *error = str_concat3( 1742 "Couldn't create pipe for \"", cmd, "\""); 1743 return bmake_strdup(""); 1744 } 1745 1746 Var_ReexportVars(); 1747 1748 switch (cpid = vfork()) { 1749 case 0: 1750 (void)close(pipefds[0]); 1751 (void)dup2(pipefds[1], STDOUT_FILENO); 1752 (void)close(pipefds[1]); 1753 1754 (void)execv(shellPath, UNCONST(args)); 1755 _exit(1); 1756 /* NOTREACHED */ 1757 1758 case -1: 1759 *error = str_concat3("Couldn't exec \"", cmd, "\""); 1760 return bmake_strdup(""); 1761 } 1762 1763 (void)close(pipefds[1]); /* No need for the writing half */ 1764 1765 saved_errno = 0; 1766 Buf_Init(&buf); 1767 1768 do { 1769 char result[BUFSIZ]; 1770 bytes_read = read(pipefds[0], result, sizeof result); 1771 if (bytes_read > 0) 1772 Buf_AddBytes(&buf, result, (size_t)bytes_read); 1773 } while (bytes_read > 0 || (bytes_read == -1 && errno == EINTR)); 1774 if (bytes_read == -1) 1775 saved_errno = errno; 1776 1777 (void)close(pipefds[0]); /* Close the input side of the pipe. */ 1778 1779 while ((pid = waitpid(cpid, &status, 0)) != cpid && pid >= 0) 1780 JobReapChild(pid, status, false); 1781 1782 if (Buf_EndsWith(&buf, '\n')) 1783 buf.data[buf.len - 1] = '\0'; 1784 1785 output = Buf_DoneData(&buf); 1786 for (cp = output; *cp != '\0'; cp++) 1787 if (*cp == '\n') 1788 *cp = ' '; 1789 1790 if (WIFSIGNALED(status)) 1791 *error = str_concat3("\"", cmd, "\" exited on a signal"); 1792 else if (WEXITSTATUS(status) != 0) 1793 *error = str_concat3( 1794 "\"", cmd, "\" returned non-zero status"); 1795 else if (saved_errno != 0) 1796 *error = str_concat3( 1797 "Couldn't read shell's output for \"", cmd, "\""); 1798 else 1799 *error = NULL; 1800 return output; 1801 } 1802 1803 /* 1804 * Print a printf-style error message. 1805 * 1806 * In default mode, this error message has no consequences, for compatibility 1807 * reasons, in particular it does not affect the exit status. Only in lint 1808 * mode (-dL) it does. 1809 */ 1810 void 1811 Error(const char *fmt, ...) 1812 { 1813 va_list ap; 1814 FILE *f; 1815 1816 f = opts.debug_file; 1817 if (f == stdout) 1818 f = stderr; 1819 (void)fflush(stdout); 1820 1821 for (;;) { 1822 fprintf(f, "%s: ", progname); 1823 va_start(ap, fmt); 1824 (void)vfprintf(f, fmt, ap); 1825 va_end(ap); 1826 (void)fprintf(f, "\n"); 1827 (void)fflush(f); 1828 if (f == stderr) 1829 break; 1830 f = stderr; 1831 } 1832 main_errors++; 1833 } 1834 1835 /* 1836 * Wait for any running jobs to finish, then produce an error message, 1837 * finally exit immediately. 1838 * 1839 * Exiting immediately differs from Parse_Error, which exits only after the 1840 * current top-level makefile has been parsed completely. 1841 */ 1842 void 1843 Fatal(const char *fmt, ...) 1844 { 1845 va_list ap; 1846 1847 if (jobsRunning) 1848 Job_Wait(); 1849 1850 (void)fflush(stdout); 1851 va_start(ap, fmt); 1852 (void)vfprintf(stderr, fmt, ap); 1853 va_end(ap); 1854 (void)fprintf(stderr, "\n"); 1855 (void)fflush(stderr); 1856 PrintStackTrace(true); 1857 1858 PrintOnError(NULL, "\n"); 1859 1860 if (DEBUG(GRAPH2) || DEBUG(GRAPH3)) 1861 Targ_PrintGraph(2); 1862 Trace_Log(MAKEERROR, NULL); 1863 exit(2); /* Not 1 so -q can distinguish error */ 1864 } 1865 1866 /* 1867 * Major exception once jobs are being created. 1868 * Kills all jobs, prints a message and exits. 1869 */ 1870 void 1871 Punt(const char *fmt, ...) 1872 { 1873 va_list ap; 1874 1875 (void)fflush(stdout); 1876 (void)fprintf(stderr, "%s: ", progname); 1877 va_start(ap, fmt); 1878 (void)vfprintf(stderr, fmt, ap); 1879 va_end(ap); 1880 (void)fprintf(stderr, "\n"); 1881 (void)fflush(stderr); 1882 1883 PrintOnError(NULL, "\n"); 1884 1885 DieHorribly(); 1886 } 1887 1888 /* Exit without giving a message. */ 1889 void 1890 DieHorribly(void) 1891 { 1892 if (jobsRunning) 1893 Job_AbortAll(); 1894 if (DEBUG(GRAPH2)) 1895 Targ_PrintGraph(2); 1896 Trace_Log(MAKEERROR, NULL); 1897 exit(2); /* Not 1 so -q can distinguish error */ 1898 } 1899 1900 /* 1901 * Called when aborting due to errors in child shell to signal abnormal exit. 1902 * The program exits. 1903 * Errors is the number of errors encountered in Make_Make. 1904 */ 1905 void 1906 Finish(int errs) 1907 { 1908 if (shouldDieQuietly(NULL, -1)) 1909 exit(2); 1910 Fatal("%d error%s", errs, errs == 1 ? "" : "s"); 1911 } 1912 1913 int 1914 unlink_file(const char *file) 1915 { 1916 struct stat st; 1917 1918 if (lstat(file, &st) == -1) 1919 return -1; 1920 1921 if (S_ISDIR(st.st_mode)) { 1922 /* 1923 * POSIX says for unlink: "The path argument shall not name 1924 * a directory unless [...]". 1925 */ 1926 errno = EISDIR; 1927 return -1; 1928 } 1929 return unlink(file); 1930 } 1931 1932 static void 1933 write_all(int fd, const void *data, size_t n) 1934 { 1935 const char *mem = data; 1936 1937 while (n > 0) { 1938 ssize_t written = write(fd, mem, n); 1939 /* XXX: Should this EAGAIN be EINTR? */ 1940 if (written == -1 && errno == EAGAIN) 1941 continue; 1942 if (written == -1) 1943 break; 1944 mem += written; 1945 n -= (size_t)written; 1946 } 1947 } 1948 1949 /* Print why exec failed, avoiding stdio. */ 1950 void MAKE_ATTR_DEAD 1951 execDie(const char *af, const char *av) 1952 { 1953 Buffer buf; 1954 1955 Buf_Init(&buf); 1956 Buf_AddStr(&buf, progname); 1957 Buf_AddStr(&buf, ": "); 1958 Buf_AddStr(&buf, af); 1959 Buf_AddStr(&buf, "("); 1960 Buf_AddStr(&buf, av); 1961 Buf_AddStr(&buf, ") failed ("); 1962 Buf_AddStr(&buf, strerror(errno)); 1963 Buf_AddStr(&buf, ")\n"); 1964 1965 write_all(STDERR_FILENO, buf.data, buf.len); 1966 1967 Buf_Done(&buf); 1968 _exit(1); 1969 } 1970 1971 static void 1972 purge_relative_cached_realpaths(void) 1973 { 1974 HashEntry *he, *nhe; 1975 HashIter hi; 1976 1977 HashIter_Init(&hi, &cached_realpaths); 1978 he = HashIter_Next(&hi); 1979 while (he != NULL) { 1980 nhe = HashIter_Next(&hi); 1981 if (he->key[0] != '/') { 1982 DEBUG1(DIR, "cached_realpath: purging %s\n", he->key); 1983 HashTable_DeleteEntry(&cached_realpaths, he); 1984 /* 1985 * XXX: What about the allocated he->value? Either 1986 * free them or document why they cannot be freed. 1987 */ 1988 } 1989 he = nhe; 1990 } 1991 } 1992 1993 const char * 1994 cached_realpath(const char *pathname, char *resolved) 1995 { 1996 const char *rp; 1997 1998 if (pathname == NULL || pathname[0] == '\0') 1999 return NULL; 2000 2001 rp = HashTable_FindValue(&cached_realpaths, pathname); 2002 if (rp != NULL) { 2003 /* a hit */ 2004 strncpy(resolved, rp, MAXPATHLEN); 2005 resolved[MAXPATHLEN - 1] = '\0'; 2006 return resolved; 2007 } 2008 2009 rp = realpath(pathname, resolved); 2010 if (rp != NULL) { 2011 HashTable_Set(&cached_realpaths, pathname, bmake_strdup(rp)); 2012 DEBUG2(DIR, "cached_realpath: %s -> %s\n", pathname, rp); 2013 return resolved; 2014 } 2015 2016 /* should we negative-cache? */ 2017 return NULL; 2018 } 2019 2020 /* 2021 * Return true if we should die without noise. 2022 * For example our failing child was a sub-make or failure happened elsewhere. 2023 */ 2024 bool 2025 shouldDieQuietly(GNode *gn, int bf) 2026 { 2027 static int quietly = -1; 2028 2029 if (quietly < 0) { 2030 if (DEBUG(JOB) || 2031 !GetBooleanExpr("${.MAKE.DIE_QUIETLY}", true)) 2032 quietly = 0; 2033 else if (bf >= 0) 2034 quietly = bf; 2035 else 2036 quietly = (gn != NULL && (gn->type & OP_MAKE)) ? 1 : 0; 2037 } 2038 return quietly != 0; 2039 } 2040 2041 static void 2042 SetErrorVars(GNode *gn) 2043 { 2044 StringListNode *ln; 2045 2046 /* 2047 * We can print this even if there is no .ERROR target. 2048 */ 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 #ifdef POSIX 2124 setenv("MAKEFLAGS", flags, 1); 2125 #else 2126 setenv("MAKE", flags, 1); 2127 #endif 2128 } 2129 } 2130 2131 char * 2132 getTmpdir(void) 2133 { 2134 static char *tmpdir = NULL; 2135 struct stat st; 2136 2137 if (tmpdir != NULL) 2138 return tmpdir; 2139 2140 /* Honor $TMPDIR if it is valid, strip a trailing '/'. */ 2141 tmpdir = Var_Subst("${TMPDIR:tA:U" _PATH_TMP ":S,/$,,W}/", 2142 SCOPE_GLOBAL, VARE_WANTRES); 2143 /* TODO: handle errors */ 2144 2145 if (stat(tmpdir, &st) < 0 || !S_ISDIR(st.st_mode)) { 2146 free(tmpdir); 2147 tmpdir = bmake_strdup(_PATH_TMP); 2148 } 2149 return tmpdir; 2150 } 2151 2152 /* 2153 * Create and open a temp file using "pattern". 2154 * If out_fname is provided, set it to a copy of the filename created. 2155 * Otherwise unlink the file once open. 2156 */ 2157 int 2158 mkTempFile(const char *pattern, char *tfile, size_t tfile_sz) 2159 { 2160 static char *tmpdir = NULL; 2161 char tbuf[MAXPATHLEN]; 2162 int fd; 2163 2164 if (pattern == NULL) 2165 pattern = TMPPAT; 2166 if (tmpdir == NULL) 2167 tmpdir = getTmpdir(); 2168 if (tfile == NULL) { 2169 tfile = tbuf; 2170 tfile_sz = sizeof tbuf; 2171 } 2172 2173 if (pattern[0] == '/') 2174 snprintf(tfile, tfile_sz, "%s", pattern); 2175 else 2176 snprintf(tfile, tfile_sz, "%s%s", tmpdir, pattern); 2177 2178 if ((fd = mkstemp(tfile)) < 0) 2179 Punt("Could not create temporary file %s: %s", tfile, 2180 strerror(errno)); 2181 if (tfile == tbuf) 2182 unlink(tfile); /* we just want the descriptor */ 2183 2184 return fd; 2185 } 2186 2187 /* 2188 * Convert a string representation of a boolean into a boolean value. 2189 * Anything that looks like "No", "False", "Off", "0" etc. is false, 2190 * the empty string is the fallback, everything else is true. 2191 */ 2192 bool 2193 ParseBoolean(const char *s, bool fallback) 2194 { 2195 char ch = ch_tolower(s[0]); 2196 if (ch == '\0') 2197 return fallback; 2198 if (ch == '0' || ch == 'f' || ch == 'n') 2199 return false; 2200 if (ch == 'o') 2201 return ch_tolower(s[1]) != 'f'; 2202 return true; 2203 } 2204
Indexes created Mon Sep 22 13:09:51 GMT 2025