main.c revision 1.646
1 /* $NetBSD: main.c,v 1.646 2025/05/10 13:47:53 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 88 #include <sys/types.h> 89 #include <sys/time.h> 90 #include <sys/param.h> 91 #include <sys/resource.h> 92 #include <sys/stat.h> 93 #ifdef MAKE_NATIVE 94 #include <sys/sysctl.h> 95 #endif 96 #include <sys/utsname.h> 97 #include <sys/wait.h> 98 99 #include <errno.h> 100 #include <signal.h> 101 #include <stdarg.h> 102 #include <time.h> 103 104 #include "make.h" 105 #include "dir.h" 106 #include "job.h" 107 #ifdef USE_META 108 # include "meta.h" 109 #endif 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 1.646 2025/05/10 13:47:53 rillig 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 tokenPoolReader = -1, tokenPoolWriter = -1; 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 snprintf(curdir, MAXPATHLEN, "%s", argvalue); 372 ignorePWD = true; 373 } 374 375 static void 376 MainParseArgJobsInternal(const char *argvalue) 377 { 378 char end; 379 if (sscanf(argvalue, "%d,%d%c", 380 &tokenPoolReader, &tokenPoolWriter, &end) != 2) { 381 (void)fprintf(stderr, 382 "%s: internal error -- J option malformed (%s)\n", 383 progname, argvalue); 384 usage(); 385 } 386 if ((fcntl(tokenPoolReader, F_GETFD, 0) < 0) || 387 (fcntl(tokenPoolWriter, F_GETFD, 0) < 0)) { 388 tokenPoolReader = -1; 389 tokenPoolWriter = -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 = end; 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 = end; 416 } else 417 d = 0.0; 418 if (d > 0.0) { 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 if (strncmp(argvalue, ".../", 4) == 0) { 443 char *found_path = Dir_FindHereOrAbove(curdir, argvalue + 4); 444 if (found_path == NULL) 445 return; 446 (void)SearchPath_Add(sysIncPath, found_path); 447 free(found_path); 448 } else { 449 (void)SearchPath_Add(sysIncPath, argvalue); 450 } 451 Global_Append(MAKEFLAGS, "-m"); 452 Global_Append(MAKEFLAGS, argvalue); 453 Dir_SetSYSPATH(); 454 } 455 456 static bool 457 MainParseOption(char c, const char *argvalue) 458 { 459 switch (c) { 460 case '\0': 461 break; 462 case 'B': 463 opts.compatMake = true; 464 Global_Append(MAKEFLAGS, "-B"); 465 Global_Set(".MAKE.MODE", "compat"); 466 break; 467 case 'C': 468 MainParseArgChdir(argvalue); 469 break; 470 case 'D': 471 if (argvalue[0] == '\0') 472 return false; 473 Var_SetExpand(SCOPE_GLOBAL, argvalue, "1"); 474 Global_Append(MAKEFLAGS, "-D"); 475 Global_Append(MAKEFLAGS, argvalue); 476 break; 477 case 'I': 478 SearchPath_Add(parseIncPath, argvalue); 479 Global_Append(MAKEFLAGS, "-I"); 480 Global_Append(MAKEFLAGS, argvalue); 481 break; 482 case 'J': 483 MainParseArgJobsInternal(argvalue); 484 break; 485 case 'N': 486 opts.noExecute = true; 487 opts.noRecursiveExecute = true; 488 Global_Append(MAKEFLAGS, "-N"); 489 break; 490 case 'S': 491 opts.keepgoing = false; 492 Global_Append(MAKEFLAGS, "-S"); 493 break; 494 case 'T': 495 tracefile = bmake_strdup(argvalue); 496 Global_Append(MAKEFLAGS, "-T"); 497 Global_Append(MAKEFLAGS, argvalue); 498 break; 499 case 'V': 500 case 'v': 501 opts.printVars = c == 'v' ? PVM_EXPANDED : PVM_UNEXPANDED; 502 Lst_Append(&opts.variables, bmake_strdup(argvalue)); 503 /* XXX: Why always -V? */ 504 Global_Append(MAKEFLAGS, "-V"); 505 Global_Append(MAKEFLAGS, argvalue); 506 break; 507 case 'W': 508 opts.parseWarnFatal = true; 509 /* XXX: why no Global_Append? */ 510 break; 511 case 'X': 512 opts.varNoExportEnv = true; 513 Global_Append(MAKEFLAGS, "-X"); 514 break; 515 case 'd': 516 /* If '-d-opts' don't pass to children */ 517 if (argvalue[0] == '-') 518 argvalue++; 519 else { 520 Global_Append(MAKEFLAGS, "-d"); 521 Global_Append(MAKEFLAGS, argvalue); 522 } 523 MainParseArgDebug(argvalue); 524 break; 525 case 'e': 526 opts.checkEnvFirst = true; 527 Global_Append(MAKEFLAGS, "-e"); 528 break; 529 case 'f': 530 Lst_Append(&opts.makefiles, bmake_strdup(argvalue)); 531 break; 532 case 'i': 533 opts.ignoreErrors = true; 534 Global_Append(MAKEFLAGS, "-i"); 535 break; 536 case 'j': 537 MainParseArgJobs(argvalue); 538 break; 539 case 'k': 540 opts.keepgoing = true; 541 Global_Append(MAKEFLAGS, "-k"); 542 break; 543 case 'm': 544 MainParseArgSysInc(argvalue); 545 /* XXX: why no Var_Append? */ 546 break; 547 case 'n': 548 opts.noExecute = true; 549 Global_Append(MAKEFLAGS, "-n"); 550 break; 551 case 'q': 552 opts.query = true; 553 /* Kind of nonsensical, wot? */ 554 Global_Append(MAKEFLAGS, "-q"); 555 break; 556 case 'r': 557 opts.noBuiltins = true; 558 Global_Append(MAKEFLAGS, "-r"); 559 break; 560 case 's': 561 opts.silent = true; 562 Global_Append(MAKEFLAGS, "-s"); 563 break; 564 case 't': 565 opts.touch = true; 566 Global_Append(MAKEFLAGS, "-t"); 567 break; 568 case 'w': 569 opts.enterFlag = true; 570 Global_Append(MAKEFLAGS, "-w"); 571 break; 572 default: 573 usage(); 574 } 575 return true; 576 } 577 578 /* 579 * Parse the given arguments. Called from main() and from 580 * Main_ParseArgLine() when the .MAKEFLAGS target is used. 581 * 582 * The arguments must be treated as read-only and will be freed after the 583 * call. 584 * 585 * XXX: Deal with command line overriding .MAKEFLAGS in makefile 586 */ 587 static void 588 MainParseArgs(int argc, char **argv) 589 { 590 char c; 591 int arginc; 592 char *argvalue; 593 char *optscan; 594 bool inOption, dashDash = false; 595 596 const char *optspecs = "BC:D:I:J:NST:V:WXd:ef:ij:km:nqrstv:w"; 597 /* Can't actually use getopt(3) because rescanning is not portable */ 598 599 rearg: 600 inOption = false; 601 optscan = NULL; 602 while (argc > 1) { 603 const char *optspec; 604 if (!inOption) 605 optscan = argv[1]; 606 c = *optscan++; 607 arginc = 0; 608 if (inOption) { 609 if (c == '\0') { 610 argv++; 611 argc--; 612 inOption = false; 613 continue; 614 } 615 } else { 616 if (c != '-' || dashDash) 617 break; 618 inOption = true; 619 c = *optscan++; 620 } 621 /* '-' found at some earlier point */ 622 optspec = strchr(optspecs, c); 623 if (c != '\0' && optspec != NULL && optspec[1] == ':') { 624 /* 625 * -<something> found, and <something> should have an 626 * argument 627 */ 628 inOption = false; 629 arginc = 1; 630 argvalue = optscan; 631 if (*argvalue == '\0') { 632 if (argc < 3) 633 goto noarg; 634 argvalue = argv[2]; 635 arginc = 2; 636 } 637 } else { 638 argvalue = NULL; 639 } 640 switch (c) { 641 case '\0': 642 arginc = 1; 643 inOption = false; 644 break; 645 case '-': 646 dashDash = true; 647 break; 648 default: 649 if (!MainParseOption(c, argvalue)) 650 goto noarg; 651 } 652 argv += arginc; 653 argc -= arginc; 654 } 655 656 /* 657 * See if the rest of the arguments are variable assignments and 658 * perform them if so. Else take them to be targets and stuff them 659 * on the end of the "create" list. 660 */ 661 for (; argc > 1; argv++, argc--) { 662 if (!Parse_VarAssign(argv[1], false, SCOPE_CMDLINE)) { 663 if (argv[1][0] == '\0') 664 Punt("illegal (null) argument."); 665 if (argv[1][0] == '-' && !dashDash) 666 goto rearg; 667 Lst_Append(&opts.create, bmake_strdup(argv[1])); 668 } 669 } 670 671 return; 672 noarg: 673 (void)fprintf(stderr, "%s: option requires an argument -- %c\n", 674 progname, c); 675 usage(); 676 } 677 678 /* 679 * Break a line of arguments into words and parse them. 680 * 681 * Used when a .MFLAGS or .MAKEFLAGS target is encountered during parsing and 682 * by main() when reading the MAKEFLAGS environment variable. 683 */ 684 void 685 Main_ParseArgLine(const char *line) 686 { 687 Words words; 688 char *buf; 689 const char *p; 690 691 if (line == NULL) 692 return; 693 for (p = line; *p == ' '; p++) 694 continue; 695 if (p[0] == '\0') 696 return; 697 698 { 699 FStr argv0 = Var_Value(SCOPE_GLOBAL, ".MAKE"); 700 buf = str_concat3(argv0.str, " ", p); 701 FStr_Done(&argv0); 702 } 703 704 words = Str_Words(buf, true); 705 if (words.words == NULL) { 706 Error("Unterminated quoted string [%s]", buf); 707 free(buf); 708 return; 709 } 710 free(buf); 711 MainParseArgs((int)words.len, words.words); 712 713 Words_Free(words); 714 } 715 716 bool 717 Main_SetObjdir(bool writable, const char *fmt, ...) 718 { 719 struct stat sb; 720 char *path; 721 char buf[MAXPATHLEN + 1]; 722 char buf2[MAXPATHLEN + 1]; 723 va_list ap; 724 725 va_start(ap, fmt); 726 vsnprintf(path = buf, MAXPATHLEN, fmt, ap); 727 va_end(ap); 728 729 if (path[0] != '/') { 730 if (snprintf(buf2, MAXPATHLEN, "%s/%s", curdir, path) <= MAXPATHLEN) 731 path = buf2; 732 else 733 return false; 734 } 735 736 /* look for the directory and try to chdir there */ 737 if (stat(path, &sb) != 0 || !S_ISDIR(sb.st_mode)) 738 return false; 739 740 if ((writable && access(path, W_OK) != 0) || chdir(path) != 0) { 741 (void)fprintf(stderr, "%s: warning: %s: %s.\n", 742 progname, path, strerror(errno)); 743 /* Allow debugging how we got here - not always obvious */ 744 if (GetBooleanExpr("${MAKE_DEBUG_OBJDIR_CHECK_WRITABLE}", 745 false)) 746 PrintOnError(NULL, ""); 747 return false; 748 } 749 750 snprintf(objdir, sizeof objdir, "%s", path); 751 Global_Set(".OBJDIR", objdir); 752 setenv("PWD", objdir, 1); 753 Dir_InitDot(); 754 purge_relative_cached_realpaths(); 755 if (opts.enterFlag && strcmp(objdir, curdir) != 0) 756 enterFlagObj = true; 757 return true; 758 } 759 760 static bool 761 SetVarObjdir(bool writable, const char *var, const char *suffix) 762 { 763 FStr path = Var_Value(SCOPE_CMDLINE, var); 764 765 if (path.str == NULL || path.str[0] == '\0') { 766 FStr_Done(&path); 767 return false; 768 } 769 770 Var_Expand(&path, SCOPE_GLOBAL, VARE_EVAL); 771 772 (void)Main_SetObjdir(writable, "%s%s", path.str, suffix); 773 774 FStr_Done(&path); 775 return true; 776 } 777 778 /* 779 * Splits str into words (in-place, modifying it), adding them to the list. 780 * The string must be kept alive as long as the list. 781 */ 782 void 783 AppendWords(StringList *lp, char *str) 784 { 785 char *p; 786 const char *sep = " \t"; 787 788 for (p = strtok(str, sep); p != NULL; p = strtok(NULL, sep)) 789 Lst_Append(lp, p); 790 } 791 792 #ifdef SIGINFO 793 static void 794 siginfo(int signo MAKE_ATTR_UNUSED) 795 { 796 char dir[MAXPATHLEN]; 797 char str[2 * MAXPATHLEN]; 798 int len; 799 if (getcwd(dir, sizeof dir) == NULL) 800 return; 801 len = snprintf(str, sizeof str, "%s: Working in: %s\n", progname, dir); 802 if (len > 0) 803 (void)write(STDERR_FILENO, str, (size_t)len); 804 } 805 #endif 806 807 /* Allow makefiles some control over the mode we run in. */ 808 static void 809 MakeMode(void) 810 { 811 char *mode = Var_Subst("${.MAKE.MODE:tl}", SCOPE_GLOBAL, VARE_EVAL); 812 /* TODO: handle errors */ 813 814 if (mode[0] != '\0') { 815 if (strstr(mode, "compat") != NULL) { 816 opts.compatMake = true; 817 forceJobs = false; 818 } 819 #if USE_META 820 if (strstr(mode, "meta") != NULL) 821 meta_mode_init(mode); 822 #endif 823 if (strstr(mode, "randomize-targets") != NULL) 824 opts.randomizeTargets = true; 825 } 826 827 free(mode); 828 } 829 830 static void 831 PrintVar(const char *varname, bool expandVars) 832 { 833 if (strchr(varname, '$') != NULL) { 834 char *evalue = Var_Subst(varname, SCOPE_GLOBAL, VARE_EVAL); 835 /* TODO: handle errors */ 836 printf("%s\n", evalue); 837 free(evalue); 838 839 } else if (expandVars) { 840 char *expr = str_concat3("${", varname, "}"); 841 char *evalue = Var_Subst(expr, SCOPE_GLOBAL, VARE_EVAL); 842 /* TODO: handle errors */ 843 free(expr); 844 printf("%s\n", evalue); 845 free(evalue); 846 847 } else { 848 FStr value = Var_Value(SCOPE_GLOBAL, varname); 849 printf("%s\n", value.str != NULL ? value.str : ""); 850 FStr_Done(&value); 851 } 852 } 853 854 /* 855 * Return a bool based on a variable. 856 * 857 * If the knob is not set, return the fallback. 858 * If set, anything that looks or smells like "No", "False", "Off", "0", etc. 859 * is false, otherwise true. 860 */ 861 bool 862 GetBooleanExpr(const char *expr, bool fallback) 863 { 864 char *value; 865 bool res; 866 867 value = Var_Subst(expr, SCOPE_GLOBAL, VARE_EVAL); 868 /* TODO: handle errors */ 869 res = ParseBoolean(value, fallback); 870 free(value); 871 return res; 872 } 873 874 static void 875 doPrintVars(void) 876 { 877 StringListNode *ln; 878 bool expandVars; 879 880 if (opts.printVars == PVM_EXPANDED) 881 expandVars = true; 882 else if (opts.debugVflag) 883 expandVars = false; 884 else 885 expandVars = GetBooleanExpr("${.MAKE.EXPAND_VARIABLES}", 886 false); 887 888 for (ln = opts.variables.first; ln != NULL; ln = ln->next) { 889 const char *varname = ln->datum; 890 PrintVar(varname, expandVars); 891 } 892 } 893 894 static bool 895 runTargets(void) 896 { 897 GNodeList targs = LST_INIT; /* target nodes to create */ 898 bool outOfDate; /* false if all targets up to date */ 899 900 /* 901 * Have now read the entire graph and need to make a list of 902 * targets to create. If none was given on the command line, 903 * we consult the parsing module to find the main target(s) 904 * to create. 905 */ 906 if (Lst_IsEmpty(&opts.create)) 907 Parse_MainName(&targs); 908 else 909 Targ_FindList(&targs, &opts.create); 910 911 if (!opts.compatMake) { 912 /* 913 * Initialize job module before traversing the graph 914 * now that any .BEGIN and .END targets have been read. 915 * This is done only if the -q flag wasn't given 916 * (to prevent the .BEGIN from being executed should 917 * it exist). 918 */ 919 if (!opts.query) { 920 Job_Init(); 921 jobsRunning = true; 922 } 923 924 /* Traverse the graph, checking on all the targets */ 925 outOfDate = Make_Run(&targs); 926 } else { 927 Compat_MakeAll(&targs); 928 outOfDate = false; 929 } 930 Lst_Done(&targs); /* Don't free the targets themselves. */ 931 return outOfDate; 932 } 933 934 /* 935 * Set up the .TARGETS variable to contain the list of targets to be created. 936 * If none specified, make the variable empty for now, the parser will fill 937 * in the default or .MAIN target later. 938 */ 939 static void 940 InitVarTargets(void) 941 { 942 StringListNode *ln; 943 944 if (Lst_IsEmpty(&opts.create)) { 945 Global_Set(".TARGETS", ""); 946 return; 947 } 948 949 for (ln = opts.create.first; ln != NULL; ln = ln->next) { 950 const char *name = ln->datum; 951 Global_Append(".TARGETS", name); 952 } 953 } 954 955 static void 956 InitRandom(void) 957 { 958 struct timeval tv; 959 960 gettimeofday(&tv, NULL); 961 srandom((unsigned)(tv.tv_sec + tv.tv_usec)); 962 } 963 964 static const char * 965 InitVarMachine(const struct utsname *utsname MAKE_ATTR_UNUSED) 966 { 967 const char *machine = getenv("MACHINE"); 968 if (machine != NULL) 969 return machine; 970 971 #if defined(MAKE_NATIVE) 972 return utsname->machine; 973 #elif defined(MAKE_MACHINE) 974 return MAKE_MACHINE; 975 #else 976 return "unknown"; 977 #endif 978 } 979 980 static const char * 981 InitVarMachineArch(void) 982 { 983 const char *env = getenv("MACHINE_ARCH"); 984 if (env != NULL) 985 return env; 986 987 #ifdef MAKE_NATIVE 988 { 989 struct utsname utsname; 990 static char machine_arch_buf[sizeof utsname.machine]; 991 const int mib[2] = { CTL_HW, HW_MACHINE_ARCH }; 992 size_t len = sizeof machine_arch_buf; 993 994 if (sysctl(mib, (unsigned)__arraycount(mib), 995 machine_arch_buf, &len, NULL, 0) < 0) { 996 (void)fprintf(stderr, "%s: sysctl failed (%s).\n", 997 progname, strerror(errno)); 998 exit(2); 999 } 1000 1001 return machine_arch_buf; 1002 } 1003 #elif defined(MACHINE_ARCH) 1004 return MACHINE_ARCH; 1005 #elif defined(MAKE_MACHINE_ARCH) 1006 return MAKE_MACHINE_ARCH; 1007 #else 1008 return "unknown"; 1009 #endif 1010 } 1011 1012 #ifndef NO_PWD_OVERRIDE 1013 /* 1014 * Overriding getcwd() with $PWD totally breaks MAKEOBJDIRPREFIX 1015 * since the value of curdir can vary depending on how we got 1016 * here. That is, sitting at a shell prompt (shell that provides $PWD) 1017 * or via subdir.mk, in which case it's likely a shell which does 1018 * not provide it. 1019 * 1020 * So, to stop it breaking this case only, we ignore PWD if 1021 * MAKEOBJDIRPREFIX is set or MAKEOBJDIR contains an expression. 1022 */ 1023 static void 1024 HandlePWD(const struct stat *curdir_st) 1025 { 1026 char *pwd; 1027 FStr makeobjdir; 1028 struct stat pwd_st; 1029 1030 if (ignorePWD || (pwd = getenv("PWD")) == NULL) 1031 return; 1032 1033 if (Var_Exists(SCOPE_CMDLINE, "MAKEOBJDIRPREFIX")) 1034 return; 1035 1036 makeobjdir = Var_Value(SCOPE_CMDLINE, "MAKEOBJDIR"); 1037 if (makeobjdir.str != NULL && strchr(makeobjdir.str, '$') != NULL) 1038 goto ignore_pwd; 1039 1040 if (stat(pwd, &pwd_st) == 0 && 1041 curdir_st->st_ino == pwd_st.st_ino && 1042 curdir_st->st_dev == pwd_st.st_dev) 1043 snprintf(curdir, MAXPATHLEN, "%s", pwd); 1044 1045 ignore_pwd: 1046 FStr_Done(&makeobjdir); 1047 } 1048 #endif 1049 1050 /* 1051 * Find the .OBJDIR. If MAKEOBJDIRPREFIX, or failing that, MAKEOBJDIR is set 1052 * in the environment, try only that value and fall back to .CURDIR if it 1053 * does not exist. 1054 * 1055 * Otherwise, try _PATH_OBJDIR.MACHINE-MACHINE_ARCH, _PATH_OBJDIR.MACHINE, 1056 * and finally _PATH_OBJDIRPREFIX`pwd`, in that order. If none of these 1057 * paths exist, just use .CURDIR. 1058 */ 1059 static void 1060 InitObjdir(const char *machine, const char *machine_arch) 1061 { 1062 bool writable; 1063 1064 Dir_InitCur(curdir); 1065 writable = GetBooleanExpr("${MAKE_OBJDIR_CHECK_WRITABLE}", true); 1066 (void)Main_SetObjdir(false, "%s", curdir); 1067 1068 if (!SetVarObjdir(writable, "MAKEOBJDIRPREFIX", curdir) && 1069 !SetVarObjdir(writable, "MAKEOBJDIR", "") && 1070 !Main_SetObjdir(writable, "%s.%s-%s", _PATH_OBJDIR, machine, machine_arch) && 1071 !Main_SetObjdir(writable, "%s.%s", _PATH_OBJDIR, machine) && 1072 !Main_SetObjdir(writable, "%s", _PATH_OBJDIR)) 1073 (void)Main_SetObjdir(writable, "%s%s", _PATH_OBJDIRPREFIX, curdir); 1074 } 1075 1076 /* get rid of resource limit on file descriptors */ 1077 static void 1078 UnlimitFiles(void) 1079 { 1080 #if defined(MAKE_NATIVE) || (defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE)) 1081 struct rlimit rl; 1082 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 && 1083 rl.rlim_cur != rl.rlim_max) { 1084 rl.rlim_cur = rl.rlim_max; 1085 (void)setrlimit(RLIMIT_NOFILE, &rl); 1086 } 1087 #endif 1088 } 1089 1090 static void 1091 CmdOpts_Init(void) 1092 { 1093 opts.compatMake = false; 1094 memset(&opts.debug, 0, sizeof(opts.debug)); 1095 /* opts.debug_file has already been initialized earlier */ 1096 opts.strict = false; 1097 opts.debugVflag = false; 1098 opts.checkEnvFirst = false; 1099 Lst_Init(&opts.makefiles); 1100 opts.ignoreErrors = false; /* Pay attention to non-zero returns */ 1101 opts.maxJobs = 1; 1102 opts.keepgoing = false; /* Stop on error */ 1103 opts.noRecursiveExecute = false; /* Execute all .MAKE targets */ 1104 opts.noExecute = false; /* Execute all commands */ 1105 opts.query = false; 1106 opts.noBuiltins = false; /* Read the built-in rules */ 1107 opts.silent = false; /* Print commands as executed */ 1108 opts.touch = false; 1109 opts.printVars = PVM_NONE; 1110 Lst_Init(&opts.variables); 1111 opts.parseWarnFatal = false; 1112 opts.enterFlag = false; 1113 opts.varNoExportEnv = false; 1114 Lst_Init(&opts.create); 1115 } 1116 1117 /* 1118 * Initialize MAKE and .MAKE to the path of the executable, so that it can be 1119 * found by execvp(3) and the shells, even after a chdir. 1120 * 1121 * If it's a relative path and contains a '/', resolve it to an absolute path. 1122 * Otherwise keep it as is, assuming it will be found in the PATH. 1123 */ 1124 static void 1125 InitVarMake(const char *argv0) 1126 { 1127 const char *make = argv0; 1128 char pathbuf[MAXPATHLEN]; 1129 1130 if (argv0[0] != '/' && strchr(argv0, '/') != NULL) { 1131 const char *abspath = cached_realpath(argv0, pathbuf); 1132 struct stat st; 1133 if (abspath != NULL && abspath[0] == '/' && 1134 stat(make, &st) == 0) 1135 make = abspath; 1136 } 1137 1138 Global_Set("MAKE", make); 1139 Global_Set(".MAKE", make); 1140 } 1141 1142 /* 1143 * Add the directories from the colon-separated syspath to defSysIncPath. 1144 * After returning, the contents of syspath is unspecified. 1145 */ 1146 static void 1147 InitDefSysIncPath(char *syspath) 1148 { 1149 static char defsyspath[] = _PATH_DEFSYSPATH; 1150 char *start, *p; 1151 1152 /* 1153 * If no user-supplied system path was given (through the -m option) 1154 * add the directories from the DEFSYSPATH (more than one may be given 1155 * as dir1:...:dirn) to the system include path. 1156 */ 1157 if (syspath == NULL || syspath[0] == '\0') 1158 syspath = defsyspath; 1159 else 1160 syspath = bmake_strdup(syspath); 1161 1162 for (start = syspath; *start != '\0'; start = p) { 1163 for (p = start; *p != '\0' && *p != ':'; p++) 1164 continue; 1165 if (*p == ':') 1166 *p++ = '\0'; 1167 1168 /* look for magic parent directory search string */ 1169 if (strncmp(start, ".../", 4) == 0) { 1170 char *dir = Dir_FindHereOrAbove(curdir, start + 4); 1171 if (dir != NULL) { 1172 (void)SearchPath_Add(defSysIncPath, dir); 1173 free(dir); 1174 } 1175 } else { 1176 (void)SearchPath_Add(defSysIncPath, start); 1177 } 1178 } 1179 1180 if (syspath != defsyspath) 1181 free(syspath); 1182 } 1183 1184 static void 1185 ReadBuiltinRules(void) 1186 { 1187 StringListNode *ln; 1188 StringList sysMkFiles = LST_INIT; 1189 1190 SearchPath_Expand( 1191 Lst_IsEmpty(&sysIncPath->dirs) ? defSysIncPath : sysIncPath, 1192 _PATH_DEFSYSMK, 1193 &sysMkFiles); 1194 if (Lst_IsEmpty(&sysMkFiles)) 1195 Fatal("%s: no system rules (%s).", progname, _PATH_DEFSYSMK); 1196 1197 for (ln = sysMkFiles.first; ln != NULL; ln = ln->next) 1198 if (ReadMakefile(ln->datum)) 1199 break; 1200 1201 if (ln == NULL) 1202 Fatal("%s: cannot open %s.", 1203 progname, (const char *)sysMkFiles.first->datum); 1204 1205 Lst_DoneFree(&sysMkFiles); 1206 } 1207 1208 static void 1209 InitMaxJobs(void) 1210 { 1211 char *value; 1212 int n; 1213 1214 if (forceJobs || opts.compatMake || 1215 !Var_Exists(SCOPE_GLOBAL, ".MAKE.JOBS")) 1216 return; 1217 1218 value = Var_Subst("${.MAKE.JOBS}", SCOPE_GLOBAL, VARE_EVAL); 1219 /* TODO: handle errors */ 1220 n = (int)strtol(value, NULL, 0); 1221 if (n < 1) { 1222 (void)fprintf(stderr, 1223 "%s: illegal value for .MAKE.JOBS " 1224 "-- must be positive integer!\n", 1225 progname); 1226 exit(2); /* Not 1 so -q can distinguish error */ 1227 } 1228 1229 if (n != opts.maxJobs) { 1230 Global_Append(MAKEFLAGS, "-j"); 1231 Global_Append(MAKEFLAGS, value); 1232 } 1233 1234 opts.maxJobs = n; 1235 maxJobTokens = opts.maxJobs; 1236 forceJobs = true; 1237 free(value); 1238 } 1239 1240 /* 1241 * For compatibility, look at the directories in the VPATH variable 1242 * and add them to the search path, if the variable is defined. The 1243 * variable's value is in the same format as the PATH environment 1244 * variable, i.e. <directory>:<directory>:<directory>... 1245 */ 1246 static void 1247 InitVpath(void) 1248 { 1249 char *vpath, savec, *path; 1250 if (!Var_Exists(SCOPE_CMDLINE, "VPATH")) 1251 return; 1252 1253 vpath = Var_Subst("${VPATH}", SCOPE_CMDLINE, VARE_EVAL); 1254 /* TODO: handle errors */ 1255 path = vpath; 1256 do { 1257 char *p; 1258 /* skip to end of directory */ 1259 for (p = path; *p != ':' && *p != '\0'; p++) 1260 continue; 1261 /* Save terminator character so know when to stop */ 1262 savec = *p; 1263 *p = '\0'; 1264 /* Add directory to search path */ 1265 (void)SearchPath_Add(&dirSearchPath, path); 1266 *p = savec; 1267 path = p + 1; 1268 } while (savec == ':'); 1269 free(vpath); 1270 } 1271 1272 static void 1273 ReadAllMakefiles(const StringList *makefiles) 1274 { 1275 StringListNode *ln; 1276 1277 for (ln = makefiles->first; ln != NULL; ln = ln->next) { 1278 const char *fname = ln->datum; 1279 if (!ReadMakefile(fname)) 1280 Fatal("%s: cannot open %s.", progname, fname); 1281 } 1282 } 1283 1284 static void 1285 ReadFirstDefaultMakefile(void) 1286 { 1287 StringList makefiles = LST_INIT; 1288 StringListNode *ln; 1289 char *prefs = Var_Subst("${.MAKE.MAKEFILE_PREFERENCE}", 1290 SCOPE_CMDLINE, VARE_EVAL); 1291 /* TODO: handle errors */ 1292 1293 AppendWords(&makefiles, prefs); 1294 1295 for (ln = makefiles.first; ln != NULL; ln = ln->next) 1296 if (ReadMakefile(ln->datum)) 1297 break; 1298 1299 Lst_Done(&makefiles); 1300 free(prefs); 1301 } 1302 1303 /* 1304 * Initialize variables such as MAKE, MACHINE, .MAKEFLAGS. 1305 * Initialize a few modules. 1306 * Parse the arguments from MAKEFLAGS and the command line. 1307 */ 1308 static void 1309 main_Init(int argc, char **argv) 1310 { 1311 struct stat sa; 1312 const char *machine; 1313 const char *machine_arch; 1314 char *syspath = getenv("MAKESYSPATH"); 1315 struct utsname utsname; 1316 1317 /* default to writing debug to stderr */ 1318 opts.debug_file = stderr; 1319 1320 Str_Intern_Init(); 1321 HashTable_Init(&cached_realpaths); 1322 1323 #ifdef SIGINFO 1324 (void)bmake_signal(SIGINFO, siginfo); 1325 #endif 1326 1327 InitRandom(); 1328 1329 progname = str_basename(argv[0]); 1330 1331 UnlimitFiles(); 1332 1333 if (uname(&utsname) == -1) { 1334 (void)fprintf(stderr, "%s: uname failed (%s).\n", progname, 1335 strerror(errno)); 1336 exit(2); 1337 } 1338 1339 machine = InitVarMachine(&utsname); 1340 machine_arch = InitVarMachineArch(); 1341 1342 myPid = getpid(); 1343 1344 /* Just in case MAKEOBJDIR wants us to do something tricky. */ 1345 Targ_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]; 1397 const char *ep = getenv(MAKE_LEVEL_ENV); 1398 1399 makelevel = ep != NULL && ep[0] != '\0' ? atoi(ep) : 0; 1400 if (makelevel < 0) 1401 makelevel = 0; 1402 snprintf(buf, sizeof buf, "%d", makelevel); 1403 Global_Set(".MAKE.LEVEL", buf); 1404 snprintf(buf, sizeof buf, "%u", myPid); 1405 Global_Set_ReadOnly(".MAKE.PID", buf); 1406 snprintf(buf, sizeof buf, "%u", getppid()); 1407 Global_Set_ReadOnly(".MAKE.PPID", buf); 1408 snprintf(buf, sizeof buf, "%u", getuid()); 1409 Global_Set_ReadOnly(".MAKE.UID", buf); 1410 snprintf(buf, sizeof buf, "%u", getgid()); 1411 Global_Set_ReadOnly(".MAKE.GID", buf); 1412 } 1413 if (makelevel > 0) { 1414 char pn[1024]; 1415 snprintf(pn, sizeof pn, "%s[%d]", progname, makelevel); 1416 progname = bmake_strdup(pn); 1417 } 1418 1419 #ifdef USE_META 1420 meta_init(); 1421 #endif 1422 Dir_Init(); 1423 1424 { 1425 char *makeflags = explode(getenv("MAKEFLAGS")); 1426 Main_ParseArgLine(makeflags); 1427 free(makeflags); 1428 } 1429 1430 if (getcwd(curdir, MAXPATHLEN) == NULL) { 1431 (void)fprintf(stderr, "%s: getcwd: %s.\n", 1432 progname, strerror(errno)); 1433 exit(2); 1434 } 1435 1436 MainParseArgs(argc, argv); 1437 1438 if (opts.enterFlag) 1439 printf("%s: Entering directory `%s'\n", progname, curdir); 1440 1441 if (stat(curdir, &sa) == -1) { 1442 (void)fprintf(stderr, "%s: %s: %s.\n", 1443 progname, curdir, strerror(errno)); 1444 exit(2); 1445 } 1446 1447 #ifndef NO_PWD_OVERRIDE 1448 HandlePWD(&sa); 1449 #endif 1450 Global_Set(".CURDIR", curdir); 1451 1452 InitObjdir(machine, machine_arch); 1453 1454 Arch_Init(); 1455 Suff_Init(); 1456 Trace_Init(tracefile); 1457 1458 defaultNode = NULL; 1459 (void)time(&now); 1460 1461 Trace_Log(MAKESTART, NULL); 1462 1463 InitVarTargets(); 1464 1465 InitDefSysIncPath(syspath); 1466 } 1467 1468 /* 1469 * Read the system makefile followed by either makefile, Makefile or the 1470 * files given by the -f option. Exit on parse errors. 1471 */ 1472 static void 1473 main_ReadFiles(void) 1474 { 1475 1476 if (Lst_IsEmpty(&sysIncPath->dirs)) 1477 SearchPath_AddAll(sysIncPath, defSysIncPath); 1478 1479 Dir_SetSYSPATH(); 1480 if (!opts.noBuiltins) 1481 ReadBuiltinRules(); 1482 1483 posix_state = PS_MAYBE_NEXT_LINE; 1484 if (!Lst_IsEmpty(&opts.makefiles)) 1485 ReadAllMakefiles(&opts.makefiles); 1486 else 1487 ReadFirstDefaultMakefile(); 1488 } 1489 1490 /* Compute the dependency graph. */ 1491 static void 1492 main_PrepareMaking(void) 1493 { 1494 /* In particular suppress .depend for '-r -V .OBJDIR -f /dev/null' */ 1495 if (!opts.noBuiltins || opts.printVars == PVM_NONE) { 1496 makeDependfile = Var_Subst("${.MAKE.DEPENDFILE}", 1497 SCOPE_CMDLINE, VARE_EVAL); 1498 if (makeDependfile[0] != '\0') { 1499 /* TODO: handle errors */ 1500 doing_depend = true; 1501 (void)ReadMakefile(makeDependfile); 1502 doing_depend = false; 1503 } 1504 } 1505 1506 if (enterFlagObj) 1507 printf("%s: Entering directory `%s'\n", progname, objdir); 1508 1509 MakeMode(); 1510 1511 { 1512 FStr makeflags = Var_Value(SCOPE_GLOBAL, MAKEFLAGS); 1513 Global_Append("MFLAGS", makeflags.str); 1514 FStr_Done(&makeflags); 1515 } 1516 1517 InitMaxJobs(); 1518 1519 if (!opts.compatMake && !forceJobs) 1520 opts.compatMake = true; 1521 1522 if (!opts.compatMake) 1523 TokenPool_Init(maxJobTokens, tokenPoolReader, tokenPoolWriter); 1524 DEBUG5(JOB, "job_pipe %d %d, maxjobs %d, tokens %d, compat %d\n", 1525 tokenPoolReader, tokenPoolWriter, opts.maxJobs, maxJobTokens, 1526 opts.compatMake ? 1 : 0); 1527 1528 if (opts.printVars == PVM_NONE) 1529 Main_ExportMAKEFLAGS(true); /* initial export */ 1530 1531 InitVpath(); 1532 1533 /* 1534 * Now that all search paths have been read for suffixes et al, it's 1535 * time to add the default search path to their lists... 1536 */ 1537 Suff_ExtendPaths(); 1538 1539 /* 1540 * Propagate attributes through :: dependency lists. 1541 */ 1542 Targ_Propagate(); 1543 1544 /* print the initial graph, if the user requested it */ 1545 if (DEBUG(GRAPH1)) 1546 Targ_PrintGraph(1); 1547 } 1548 1549 /* 1550 * Make the targets. 1551 * If the -v or -V options are given, print variables instead. 1552 * Return whether any of the targets is out-of-date. 1553 */ 1554 static bool 1555 main_Run(void) 1556 { 1557 if (opts.printVars != PVM_NONE) { 1558 /* print the values of any variables requested by the user */ 1559 doPrintVars(); 1560 return false; 1561 } else { 1562 return runTargets(); 1563 } 1564 } 1565 1566 /* Clean up after making the targets. */ 1567 static void 1568 main_CleanUp(void) 1569 { 1570 #ifdef CLEANUP 1571 Lst_DoneFree(&opts.variables); 1572 Lst_DoneFree(&opts.makefiles); 1573 Lst_DoneFree(&opts.create); 1574 #endif 1575 1576 if (DEBUG(GRAPH2)) 1577 Targ_PrintGraph(2); 1578 1579 Trace_Log(MAKEEND, NULL); 1580 1581 if (enterFlagObj) 1582 printf("%s: Leaving directory `%s'\n", progname, objdir); 1583 if (opts.enterFlag) 1584 printf("%s: Leaving directory `%s'\n", progname, curdir); 1585 1586 Var_Stats(); 1587 Targ_Stats(); 1588 1589 #ifdef USE_META 1590 meta_finish(); 1591 #endif 1592 #ifdef CLEANUP 1593 Suff_End(); 1594 Targ_End(); 1595 Arch_End(); 1596 Parse_End(); 1597 Dir_End(); 1598 Job_End(); 1599 #endif 1600 Trace_End(); 1601 #ifdef CLEANUP 1602 Str_Intern_End(); 1603 #endif 1604 } 1605 1606 /* Determine the exit code. */ 1607 static int 1608 main_Exit(bool outOfDate) 1609 { 1610 if ((opts.strict && main_errors > 0) || parseErrors > 0) 1611 return 2; /* Not 1 so -q can distinguish error */ 1612 return outOfDate ? 1 : 0; 1613 } 1614 1615 int 1616 main(int argc, char **argv) 1617 { 1618 bool outOfDate; 1619 1620 main_Init(argc, argv); 1621 main_ReadFiles(); 1622 main_PrepareMaking(); 1623 outOfDate = main_Run(); 1624 main_CleanUp(); 1625 return main_Exit(outOfDate); 1626 } 1627 1628 /* 1629 * Open and parse the given makefile, with all its side effects. 1630 * Return false if the file could not be opened. 1631 */ 1632 static bool 1633 ReadMakefile(const char *fname) 1634 { 1635 int fd; 1636 char *name, *path = NULL; 1637 1638 if (strcmp(fname, "-") == 0) { 1639 Parse_File("(stdin)", -1); 1640 Var_Set(SCOPE_INTERNAL, "MAKEFILE", ""); 1641 } else { 1642 if (strncmp(fname, ".../", 4) == 0) { 1643 name = Dir_FindHereOrAbove(curdir, fname + 4); 1644 if (name != NULL) { 1645 /* Dir_FindHereOrAbove returns dirname */ 1646 path = str_concat3(name, "/", 1647 str_basename(fname)); 1648 free(name); 1649 fd = open(path, O_RDONLY); 1650 if (fd != -1) { 1651 fname = path; 1652 goto found; 1653 } 1654 } 1655 } 1656 /* if we've chdir'd, rebuild the path name */ 1657 if (strcmp(curdir, objdir) != 0 && *fname != '/') { 1658 path = str_concat3(curdir, "/", fname); 1659 fd = open(path, O_RDONLY); 1660 if (fd != -1) { 1661 fname = path; 1662 goto found; 1663 } 1664 free(path); 1665 1666 /* If curdir failed, try objdir (ala .depend) */ 1667 path = str_concat3(objdir, "/", fname); 1668 fd = open(path, O_RDONLY); 1669 if (fd != -1) { 1670 fname = path; 1671 goto found; 1672 } 1673 } else { 1674 fd = open(fname, O_RDONLY); 1675 if (fd != -1) 1676 goto found; 1677 } 1678 /* look in -I and system include directories. */ 1679 name = Dir_FindFile(fname, parseIncPath); 1680 if (name == NULL) { 1681 SearchPath *sysInc = Lst_IsEmpty(&sysIncPath->dirs) 1682 ? defSysIncPath : sysIncPath; 1683 name = Dir_FindFile(fname, sysInc); 1684 } 1685 if (name == NULL || (fd = open(name, O_RDONLY)) == -1) { 1686 free(name); 1687 free(path); 1688 return false; 1689 } 1690 fname = name; 1691 /* 1692 * set the MAKEFILE variable desired by System V fans -- the 1693 * placement of the setting here means it gets set to the last 1694 * makefile specified, as it is set by SysV make. 1695 */ 1696 found: 1697 if (!doing_depend) 1698 Var_Set(SCOPE_INTERNAL, "MAKEFILE", fname); 1699 Parse_File(fname, fd); 1700 } 1701 free(path); 1702 return true; 1703 } 1704 1705 /* populate av for Cmd_Exec and Compat_RunCommand */ 1706 int 1707 Cmd_Argv(const char *cmd, size_t cmd_len, const char **av, size_t avsz, 1708 char *cmd_file, size_t cmd_filesz, bool eflag, bool xflag) 1709 { 1710 int ac = 0; 1711 int cmd_fd = -1; 1712 1713 if (shellPath == NULL) 1714 Shell_Init(); 1715 1716 if (cmd_file != NULL) { 1717 if (cmd_len == 0) 1718 cmd_len = strlen(cmd); 1719 1720 if (cmd_len > MAKE_CMDLEN_LIMIT) { 1721 cmd_fd = mkTempFile(NULL, cmd_file, cmd_filesz); 1722 if (cmd_fd >= 0) { 1723 ssize_t n; 1724 1725 n = write(cmd_fd, cmd, cmd_len); 1726 close(cmd_fd); 1727 if (n < (ssize_t)cmd_len) { 1728 unlink(cmd_file); 1729 cmd_fd = -1; 1730 } 1731 } 1732 } else 1733 cmd_file[0] = '\0'; 1734 } 1735 1736 if (avsz < 4 || (eflag && avsz < 5)) 1737 return -1; 1738 1739 /* The following works for any of the builtin shell specs. */ 1740 av[ac++] = shellPath; 1741 if (eflag) 1742 av[ac++] = shellErrFlag; 1743 if (cmd_fd >= 0) { 1744 if (xflag) 1745 av[ac++] = "-x"; 1746 av[ac++] = cmd_file; 1747 } else { 1748 av[ac++] = xflag ? "-xc" : "-c"; 1749 av[ac++] = cmd; 1750 } 1751 av[ac] = NULL; 1752 return ac; 1753 } 1754 1755 /* 1756 * Execute the command in cmd, and return its output (only stdout, not 1757 * stderr, possibly empty). In the output, replace newlines with spaces. 1758 */ 1759 char * 1760 Cmd_Exec(const char *cmd, char **error) 1761 { 1762 const char *args[4]; /* Arguments for invoking the shell */ 1763 int pipefds[2]; 1764 int cpid; /* Child PID */ 1765 int pid; /* PID from wait() */ 1766 int status; /* command exit status */ 1767 Buffer buf; /* buffer to store the result */ 1768 ssize_t bytes_read; 1769 char *output; 1770 char *p; 1771 int saved_errno; 1772 char cmd_file[MAXPATHLEN]; 1773 1774 DEBUG1(VAR, "Capturing the output of command \"%s\"\n", cmd); 1775 1776 if (Cmd_Argv(cmd, 0, args, 4, cmd_file, sizeof(cmd_file), false, false) < 0 1777 || pipe(pipefds) == -1) { 1778 *error = str_concat3( 1779 "Couldn't create pipe for \"", cmd, "\""); 1780 return bmake_strdup(""); 1781 } 1782 1783 Var_ReexportVars(SCOPE_GLOBAL); 1784 1785 switch (cpid = FORK_FUNCTION()) { 1786 case 0: 1787 (void)close(pipefds[0]); 1788 (void)dup2(pipefds[1], STDOUT_FILENO); 1789 (void)close(pipefds[1]); 1790 1791 (void)execv(shellPath, UNCONST(args)); 1792 _exit(1); 1793 /* NOTREACHED */ 1794 1795 case -1: 1796 *error = str_concat3("Couldn't exec \"", cmd, "\""); 1797 return bmake_strdup(""); 1798 } 1799 1800 (void)close(pipefds[1]); /* No need for the writing half */ 1801 1802 saved_errno = 0; 1803 Buf_Init(&buf); 1804 1805 do { 1806 char result[BUFSIZ]; 1807 bytes_read = read(pipefds[0], result, sizeof result); 1808 if (bytes_read > 0) 1809 Buf_AddBytes(&buf, result, (size_t)bytes_read); 1810 } while (bytes_read > 0 || (bytes_read == -1 && errno == EINTR)); 1811 if (bytes_read == -1) 1812 saved_errno = errno; 1813 1814 (void)close(pipefds[0]); /* Close the input side of the pipe. */ 1815 1816 while ((pid = waitpid(cpid, &status, 0)) != cpid && pid >= 0) 1817 JobReapChild(pid, status, false); 1818 1819 if (Buf_EndsWith(&buf, '\n')) 1820 buf.data[buf.len - 1] = '\0'; 1821 1822 output = Buf_DoneData(&buf); 1823 for (p = output; *p != '\0'; p++) 1824 if (*p == '\n') 1825 *p = ' '; 1826 1827 if (WIFSIGNALED(status)) 1828 *error = str_concat3("\"", cmd, "\" exited on a signal"); 1829 else if (WEXITSTATUS(status) != 0) { 1830 Buffer errBuf; 1831 Buf_Init(&errBuf); 1832 Buf_AddStr(&errBuf, "Command \""); 1833 Buf_AddStr(&errBuf, cmd); 1834 Buf_AddStr(&errBuf, "\" exited with status "); 1835 Buf_AddInt(&errBuf, WEXITSTATUS(status)); 1836 *error = Buf_DoneData(&errBuf); 1837 } else if (saved_errno != 0) 1838 *error = str_concat3( 1839 "Couldn't read shell's output for \"", cmd, "\""); 1840 else 1841 *error = NULL; 1842 if (cmd_file[0] != '\0') 1843 unlink(cmd_file); 1844 return output; 1845 } 1846 1847 /* 1848 * Print a printf-style error message. 1849 * 1850 * In default mode, this error message has no consequences, for compatibility 1851 * reasons, in particular it does not affect the exit status. Only in lint 1852 * mode (-dL) it does. 1853 */ 1854 void 1855 Error(const char *fmt, ...) 1856 { 1857 va_list ap; 1858 FILE *f; 1859 1860 f = opts.debug_file; 1861 if (f == stdout) 1862 f = stderr; 1863 (void)fflush(stdout); 1864 1865 for (;;) { 1866 fprintf(f, "%s: ", progname); 1867 va_start(ap, fmt); 1868 (void)vfprintf(f, fmt, ap); 1869 va_end(ap); 1870 (void)fprintf(f, "\n"); 1871 (void)fflush(f); 1872 if (f == stderr) 1873 break; 1874 f = stderr; 1875 } 1876 main_errors++; 1877 } 1878 1879 /* 1880 * Wait for any running jobs to finish, then produce an error message, 1881 * finally exit immediately. 1882 * 1883 * Exiting immediately differs from Parse_Error, which exits only after the 1884 * current top-level makefile has been parsed completely. 1885 */ 1886 void 1887 Fatal(const char *fmt, ...) 1888 { 1889 va_list ap; 1890 1891 if (jobsRunning) 1892 Job_Wait(); 1893 1894 (void)fflush(stdout); 1895 fprintf(stderr, "%s: ", progname); 1896 va_start(ap, fmt); 1897 (void)vfprintf(stderr, fmt, ap); 1898 va_end(ap); 1899 (void)fprintf(stderr, "\n"); 1900 (void)fflush(stderr); 1901 PrintStackTrace(true); 1902 1903 PrintOnError(NULL, "\n"); 1904 1905 if (DEBUG(GRAPH2) || DEBUG(GRAPH3)) 1906 Targ_PrintGraph(2); 1907 Trace_Log(MAKEERROR, NULL); 1908 exit(2); /* Not 1 so -q can distinguish error */ 1909 } 1910 1911 /* 1912 * Major exception once jobs are being created. 1913 * Kills all jobs, prints a message and exits. 1914 */ 1915 void 1916 Punt(const char *fmt, ...) 1917 { 1918 va_list ap; 1919 1920 (void)fflush(stdout); 1921 (void)fprintf(stderr, "%s: ", progname); 1922 va_start(ap, fmt); 1923 (void)vfprintf(stderr, fmt, ap); 1924 va_end(ap); 1925 (void)fprintf(stderr, "\n"); 1926 (void)fflush(stderr); 1927 1928 PrintOnError(NULL, "\n"); 1929 1930 DieHorribly(); 1931 } 1932 1933 /* Exit without giving a message. */ 1934 void 1935 DieHorribly(void) 1936 { 1937 if (jobsRunning) 1938 Job_AbortAll(); 1939 if (DEBUG(GRAPH2)) 1940 Targ_PrintGraph(2); 1941 Trace_Log(MAKEERROR, NULL); 1942 exit(2); /* Not 1 so -q can distinguish error */ 1943 } 1944 1945 int 1946 unlink_file(const char *file) 1947 { 1948 struct stat st; 1949 1950 if (lstat(file, &st) == -1) 1951 return -1; 1952 1953 if (S_ISDIR(st.st_mode)) { 1954 /* 1955 * POSIX says for unlink: "The path argument shall not name 1956 * a directory unless [...]". 1957 */ 1958 errno = EISDIR; 1959 return -1; 1960 } 1961 return unlink(file); 1962 } 1963 1964 static void 1965 write_all(int fd, const void *data, size_t n) 1966 { 1967 const char *mem = data; 1968 1969 while (n > 0) { 1970 ssize_t written = write(fd, mem, n); 1971 /* XXX: Should this EAGAIN be EINTR? */ 1972 if (written == -1 && errno == EAGAIN) 1973 continue; 1974 if (written == -1) 1975 break; 1976 mem += written; 1977 n -= (size_t)written; 1978 } 1979 } 1980 1981 /* Print why exec failed, avoiding stdio. */ 1982 void MAKE_ATTR_DEAD 1983 execDie(const char *func, const char *arg) 1984 { 1985 char msg[1024]; 1986 int len; 1987 1988 len = snprintf(msg, sizeof(msg), "%s: %s(%s) failed (%s)\n", 1989 progname, func, arg, strerror(errno)); 1990 write_all(STDERR_FILENO, msg, (size_t)len); 1991 _exit(1); 1992 } 1993 1994 static void 1995 purge_relative_cached_realpaths(void) 1996 { 1997 HashIter hi; 1998 bool more; 1999 2000 HashIter_Init(&hi, &cached_realpaths); 2001 more = HashIter_Next(&hi); 2002 while (more) { 2003 HashEntry *he = hi.entry; 2004 more = HashIter_Next(&hi); 2005 if (he->key[0] != '/') { 2006 DEBUG1(DIR, "cached_realpath: purging %s\n", he->key); 2007 free(he->value); 2008 HashTable_DeleteEntry(&cached_realpaths, he); 2009 } 2010 } 2011 } 2012 2013 const char * 2014 cached_realpath(const char *pathname, char *resolved) 2015 { 2016 const char *rp; 2017 2018 if (pathname == NULL || pathname[0] == '\0') 2019 return NULL; 2020 2021 rp = HashTable_FindValue(&cached_realpaths, pathname); 2022 if (rp != NULL) { 2023 snprintf(resolved, MAXPATHLEN, "%s", rp); 2024 return resolved; 2025 } 2026 2027 rp = realpath(pathname, resolved); 2028 if (rp != NULL) { 2029 HashTable_Set(&cached_realpaths, pathname, bmake_strdup(rp)); 2030 DEBUG2(DIR, "cached_realpath: %s -> %s\n", pathname, rp); 2031 return resolved; 2032 } 2033 2034 /* should we negative-cache? */ 2035 return NULL; 2036 } 2037 2038 /* 2039 * Return true if we should die without noise. 2040 * For example our failing child was a sub-make or failure happened elsewhere. 2041 */ 2042 bool 2043 shouldDieQuietly(GNode *gn, int bf) 2044 { 2045 static int quietly = -1; 2046 2047 if (quietly < 0) { 2048 if (DEBUG(JOB) || 2049 !GetBooleanExpr("${.MAKE.DIE_QUIETLY}", true)) 2050 quietly = 0; 2051 else if (bf >= 0) 2052 quietly = bf; 2053 else 2054 quietly = (gn != NULL && (gn->type & OP_MAKE)) ? 1 : 0; 2055 } 2056 return quietly != 0; 2057 } 2058 2059 static void 2060 SetErrorVars(GNode *gn) 2061 { 2062 StringListNode *ln; 2063 char sts[16]; 2064 2065 /* 2066 * We can print this even if there is no .ERROR target. 2067 */ 2068 snprintf(sts, sizeof(sts), "%d", gn->exit_status); 2069 Global_Set(".ERROR_EXIT", sts); 2070 Global_Set(".ERROR_TARGET", gn->name); 2071 Global_Delete(".ERROR_CMD"); 2072 2073 for (ln = gn->commands.first; ln != NULL; ln = ln->next) { 2074 const char *cmd = ln->datum; 2075 2076 if (cmd == NULL) 2077 break; 2078 Global_Append(".ERROR_CMD", cmd); 2079 } 2080 } 2081 2082 /* 2083 * Print some helpful information in case of an error. 2084 * The caller should exit soon after calling this function. 2085 */ 2086 void 2087 PrintOnError(GNode *gn, const char *msg) 2088 { 2089 static GNode *errorNode = NULL; 2090 StringListNode *ln; 2091 2092 if (DEBUG(HASH)) { 2093 Targ_Stats(); 2094 Var_Stats(); 2095 } 2096 2097 if (errorNode != NULL) 2098 return; /* we've been here! */ 2099 2100 printf("%s%s: stopped", msg, progname); 2101 ln = opts.create.first; 2102 if (ln != NULL || mainNode != NULL) { 2103 printf(" making \""); 2104 if (ln != NULL) { 2105 printf("%s", (const char *)ln->datum); 2106 for (ln = ln->next; ln != NULL; ln = ln->next) 2107 printf(" %s", (const char *)ln->datum); 2108 } else 2109 printf("%s", mainNode->name); 2110 printf("\""); 2111 } 2112 printf(" in %s\n", curdir); 2113 2114 /* we generally want to keep quiet if a sub-make died */ 2115 if (shouldDieQuietly(gn, -1)) 2116 return; 2117 2118 if (gn != NULL) 2119 SetErrorVars(gn); 2120 2121 { 2122 char *errorVarsValues; 2123 enum PosixState p_s = posix_state; 2124 2125 posix_state = PS_TOO_LATE; 2126 errorVarsValues = Var_Subst( 2127 "${MAKE_PRINT_VAR_ON_ERROR:@v@$v='${$v}'\n@}", 2128 SCOPE_GLOBAL, VARE_EVAL); 2129 /* TODO: handle errors */ 2130 printf("%s", errorVarsValues); 2131 free(errorVarsValues); 2132 posix_state = p_s; 2133 } 2134 2135 fflush(stdout); 2136 2137 /* 2138 * Finally, see if there is a .ERROR target, and run it if so. 2139 */ 2140 errorNode = Targ_FindNode(".ERROR"); 2141 if (errorNode != NULL) { 2142 errorNode->type |= OP_SPECIAL; 2143 Compat_Make(errorNode, errorNode); 2144 } 2145 } 2146 2147 void 2148 Main_ExportMAKEFLAGS(bool first) 2149 { 2150 static bool once = true; 2151 enum PosixState p_s; 2152 char *flags; 2153 2154 if (once != first) 2155 return; 2156 once = false; 2157 2158 p_s = posix_state; 2159 posix_state = PS_TOO_LATE; 2160 flags = Var_Subst( 2161 "${.MAKEFLAGS} ${.MAKEOVERRIDES:O:u:@v@$v=${$v:Q}@}", 2162 SCOPE_CMDLINE, VARE_EVAL); 2163 /* TODO: handle errors */ 2164 if (flags[0] != '\0') 2165 setenv("MAKEFLAGS", flags, 1); 2166 free(flags); 2167 posix_state = p_s; 2168 } 2169 2170 char * 2171 getTmpdir(void) 2172 { 2173 static char *tmpdir = NULL; 2174 struct stat st; 2175 2176 if (tmpdir != NULL) 2177 return tmpdir; 2178 2179 /* Honor $TMPDIR if it is valid, strip a trailing '/'. */ 2180 tmpdir = Var_Subst("${TMPDIR:tA:U" _PATH_TMP ":S,/$,,W}/", 2181 SCOPE_GLOBAL, VARE_EVAL); 2182 /* TODO: handle errors */ 2183 2184 if (stat(tmpdir, &st) < 0 || !S_ISDIR(st.st_mode)) { 2185 free(tmpdir); 2186 tmpdir = bmake_strdup(_PATH_TMP); 2187 } 2188 return tmpdir; 2189 } 2190 2191 /* 2192 * Create and open a temp file using "pattern". 2193 * If tfile is provided, set it to a copy of the filename created. 2194 * Otherwise unlink the file once open. 2195 */ 2196 int 2197 mkTempFile(const char *pattern, char *tfile, size_t tfile_sz) 2198 { 2199 static char *tmpdir = NULL; 2200 char tbuf[MAXPATHLEN]; 2201 int fd; 2202 2203 if (pattern == NULL) 2204 pattern = "makeXXXXXX"; 2205 if (tmpdir == NULL) 2206 tmpdir = getTmpdir(); 2207 if (tfile == NULL) { 2208 tfile = tbuf; 2209 tfile_sz = sizeof tbuf; 2210 } 2211 2212 if (pattern[0] == '/') 2213 snprintf(tfile, tfile_sz, "%s", pattern); 2214 else 2215 snprintf(tfile, tfile_sz, "%s%s", tmpdir, pattern); 2216 2217 if ((fd = mkstemp(tfile)) < 0) 2218 Punt("Could not create temporary file %s: %s", tfile, 2219 strerror(errno)); 2220 if (tfile == tbuf) 2221 unlink(tfile); /* we just want the descriptor */ 2222 2223 return fd; 2224 } 2225 2226 /* 2227 * Convert a string representation of a boolean into a boolean value. 2228 * Anything that looks like "No", "False", "Off", "0" etc. is false, 2229 * the empty string is the fallback, everything else is true. 2230 */ 2231 bool 2232 ParseBoolean(const char *s, bool fallback) 2233 { 2234 char ch = ch_tolower(s[0]); 2235 if (ch == '\0') 2236 return fallback; 2237 if (ch == '0' || ch == 'f' || ch == 'n') 2238 return false; 2239 if (ch == 'o') 2240 return ch_tolower(s[1]) != 'f'; 2241 return true; 2242 } 2243
Indexes created Wed Sep 24 02:09:48 GMT 2025