1 /* $NetBSD: main.c,v 1.639 2025/03/07 06:50:34 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 #if defined(MAKE_NATIVE) && defined(HAVE_SYSCTL) 94 #include <sys/sysctl.h> 95 #endif 96 #include <sys/utsname.h> 97 #include "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 #include "pathnames.h" 108 #include "trace.h" 109 110 /* "@(#)main.c 8.3 (Berkeley) 3/19/94" */ 111 MAKE_RCSID("$NetBSD: main.c,v 1.639 2025/03/07 06:50:34 rillig Exp $"); 112 #if defined(MAKE_NATIVE) 113 __COPYRIGHT("@(#) Copyright (c) 1988, 1989, 1990, 1993 " 114 "The Regents of the University of California. " 115 "All rights reserved."); 116 #endif 117 118 #ifndef __arraycount 119 # define __arraycount(__x) (sizeof(__x) / sizeof(__x[0])) 120 #endif 121 122 CmdOpts opts; 123 time_t now; /* Time at start of make */ 124 GNode *defaultNode; /* .DEFAULT node */ 125 bool allPrecious; /* .PRECIOUS given on a line by itself */ 126 bool deleteOnError; /* .DELETE_ON_ERROR: set */ 127 128 static int maxJobTokens; /* -j argument */ 129 static bool enterFlagObj; /* -w and objdir != srcdir */ 130 131 static int jp_0 = -1, jp_1 = -1; /* ends of parent job pipe */ 132 bool doing_depend; /* Set while reading .depend */ 133 static bool jobsRunning; /* true if the jobs might be running */ 134 static const char *tracefile; 135 static bool ReadMakefile(const char *); 136 static void purge_relative_cached_realpaths(void); 137 138 static bool ignorePWD; /* if we use -C, PWD is meaningless */ 139 static char objdir[MAXPATHLEN + 1]; /* where we chdir'ed to */ 140 char curdir[MAXPATHLEN + 1]; /* Startup directory */ 141 const char *progname; 142 char *makeDependfile; 143 pid_t myPid; 144 int makelevel; 145 146 bool forceJobs = false; 147 static int main_errors = 0; 148 static HashTable cached_realpaths; 149 150 /* 151 * For compatibility with the POSIX version of MAKEFLAGS that includes 152 * all the options without '-', convert 'flags' to '-f -l -a -g -s '. 153 */ 154 static char * 155 explode(const char *flags) 156 { 157 char *exploded, *ep; 158 const char *p; 159 160 if (flags == NULL) 161 return NULL; 162 163 for (p = flags; *p != '\0'; p++) 164 if (!ch_isalpha(*p)) 165 return bmake_strdup(flags); 166 167 exploded = bmake_malloc((size_t)(p - flags) * 3 + 1); 168 for (p = flags, ep = exploded; *p != '\0'; p++) { 169 *ep++ = '-'; 170 *ep++ = *p; 171 *ep++ = ' '; 172 } 173 *ep = '\0'; 174 return exploded; 175 } 176 177 MAKE_ATTR_DEAD static void 178 usage(void) 179 { 180 size_t prognameLen = strcspn(progname, "["); 181 182 (void)fprintf(stderr, 183 "usage: %.*s [-BeikNnqrSstWwX]\n" 184 " [-C directory] [-D variable] [-d flags] [-f makefile]\n" 185 " [-I directory] [-J private] [-j max_jobs] [-m directory] [-T file]\n" 186 " [-V variable] [-v variable] [variable=value] [target ...]\n", 187 (int)prognameLen, progname); 188 exit(2); 189 } 190 191 static void 192 MainParseArgDebugFile(const char *arg) 193 { 194 const char *mode; 195 size_t len; 196 char *fname; 197 198 if (opts.debug_file != stdout && opts.debug_file != stderr) 199 fclose(opts.debug_file); 200 201 if (*arg == '+') { 202 arg++; 203 mode = "a"; 204 } else 205 mode = "w"; 206 207 if (strcmp(arg, "stdout") == 0) { 208 opts.debug_file = stdout; 209 return; 210 } 211 if (strcmp(arg, "stderr") == 0) { 212 opts.debug_file = stderr; 213 return; 214 } 215 216 len = strlen(arg); 217 fname = bmake_malloc(len + 20); 218 memcpy(fname, arg, len + 1); 219 220 /* Replace the trailing '%d' after '.%d' with the pid. */ 221 if (len >= 3 && memcmp(fname + len - 3, ".%d", 3) == 0) 222 snprintf(fname + len - 2, 20, "%d", getpid()); 223 224 opts.debug_file = fopen(fname, mode); 225 if (opts.debug_file == NULL) { 226 fprintf(stderr, "Cannot open debug file \"%s\"\n", 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 snprintf(curdir, MAXPATHLEN, "%s", argvalue); 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 = 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 int)(tv.tv_sec + tv.tv_usec)); 962 } 963 964 static const char * 965 InitVarMachine(const struct utsname *utsname MAKE_ATTR_UNUSED) 966 { 967 #ifdef FORCE_MACHINE 968 return FORCE_MACHINE; 969 #else 970 const char *machine = getenv("MACHINE"); 971 972 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 #endif 983 } 984 985 static const char * 986 InitVarMachineArch(void) 987 { 988 #ifdef FORCE_MACHINE_ARCH 989 return FORCE_MACHINE_ARCH; 990 #else 991 const char *env = getenv("MACHINE_ARCH"); 992 if (env != NULL) 993 return env; 994 995 #if defined(MAKE_NATIVE) && defined(CTL_HW) 996 { 997 struct utsname utsname; 998 static char machine_arch_buf[sizeof utsname.machine]; 999 const int mib[2] = { CTL_HW, HW_MACHINE_ARCH }; 1000 size_t len = sizeof machine_arch_buf; 1001 1002 if (sysctl(mib, (unsigned int)__arraycount(mib), 1003 machine_arch_buf, &len, NULL, 0) < 0) { 1004 (void)fprintf(stderr, "%s: sysctl failed (%s).\n", 1005 progname, strerror(errno)); 1006 exit(2); 1007 } 1008 1009 return machine_arch_buf; 1010 } 1011 #elif defined(MACHINE_ARCH) 1012 return MACHINE_ARCH; 1013 #elif defined(MAKE_MACHINE_ARCH) 1014 return MAKE_MACHINE_ARCH; 1015 #else 1016 return "unknown"; 1017 #endif 1018 #endif 1019 } 1020 1021 #ifndef NO_PWD_OVERRIDE 1022 /* 1023 * Overriding getcwd() with $PWD totally breaks MAKEOBJDIRPREFIX 1024 * since the value of curdir can vary depending on how we got 1025 * here. That is, sitting at a shell prompt (shell that provides $PWD) 1026 * or via subdir.mk, in which case it's likely a shell which does 1027 * not provide it. 1028 * 1029 * So, to stop it breaking this case only, we ignore PWD if 1030 * MAKEOBJDIRPREFIX is set or MAKEOBJDIR contains an expression. 1031 */ 1032 static void 1033 HandlePWD(const struct stat *curdir_st) 1034 { 1035 char *pwd; 1036 FStr makeobjdir; 1037 struct stat pwd_st; 1038 1039 if (ignorePWD || (pwd = getenv("PWD")) == NULL) 1040 return; 1041 1042 if (Var_Exists(SCOPE_CMDLINE, "MAKEOBJDIRPREFIX")) 1043 return; 1044 1045 makeobjdir = Var_Value(SCOPE_CMDLINE, "MAKEOBJDIR"); 1046 if (makeobjdir.str != NULL && strchr(makeobjdir.str, '$') != NULL) 1047 goto ignore_pwd; 1048 1049 if (stat(pwd, &pwd_st) == 0 && 1050 curdir_st->st_ino == pwd_st.st_ino && 1051 curdir_st->st_dev == pwd_st.st_dev) 1052 snprintf(curdir, MAXPATHLEN, "%s", pwd); 1053 1054 ignore_pwd: 1055 FStr_Done(&makeobjdir); 1056 } 1057 #endif 1058 1059 /* 1060 * Find the .OBJDIR. If MAKEOBJDIRPREFIX, or failing that, MAKEOBJDIR is set 1061 * in the environment, try only that value and fall back to .CURDIR if it 1062 * does not exist. 1063 * 1064 * Otherwise, try _PATH_OBJDIR.MACHINE-MACHINE_ARCH, _PATH_OBJDIR.MACHINE, 1065 * and finally _PATH_OBJDIRPREFIX`pwd`, in that order. If none of these 1066 * paths exist, just use .CURDIR. 1067 */ 1068 static void 1069 InitObjdir(const char *machine, const char *machine_arch) 1070 { 1071 bool writable; 1072 1073 Dir_InitCur(curdir); 1074 writable = GetBooleanExpr("${MAKE_OBJDIR_CHECK_WRITABLE}", true); 1075 (void)Main_SetObjdir(false, "%s", curdir); 1076 1077 if (!SetVarObjdir(writable, "MAKEOBJDIRPREFIX", curdir) && 1078 !SetVarObjdir(writable, "MAKEOBJDIR", "") && 1079 !Main_SetObjdir(writable, "%s.%s-%s", _PATH_OBJDIR, machine, machine_arch) && 1080 !Main_SetObjdir(writable, "%s.%s", _PATH_OBJDIR, machine) && 1081 !Main_SetObjdir(writable, "%s", _PATH_OBJDIR)) 1082 (void)Main_SetObjdir(writable, "%s%s", _PATH_OBJDIRPREFIX, curdir); 1083 } 1084 1085 /* get rid of resource limit on file descriptors */ 1086 static void 1087 UnlimitFiles(void) 1088 { 1089 #if defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE) 1090 struct rlimit rl; 1091 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 && 1092 rl.rlim_cur != rl.rlim_max) { 1093 #ifdef BMAKE_NOFILE_MAX 1094 if (BMAKE_NOFILE_MAX < rl.rlim_max) 1095 rl.rlim_cur = BMAKE_NOFILE_MAX; 1096 else 1097 #endif 1098 rl.rlim_cur = rl.rlim_max; 1099 (void)setrlimit(RLIMIT_NOFILE, &rl); 1100 } 1101 #endif 1102 } 1103 1104 static void 1105 CmdOpts_Init(void) 1106 { 1107 opts.compatMake = false; 1108 memset(&opts.debug, 0, sizeof(opts.debug)); 1109 /* opts.debug_file has already been initialized earlier */ 1110 opts.strict = false; 1111 opts.debugVflag = false; 1112 opts.checkEnvFirst = false; 1113 Lst_Init(&opts.makefiles); 1114 opts.ignoreErrors = false; /* Pay attention to non-zero returns */ 1115 opts.maxJobs = 1; 1116 opts.keepgoing = false; /* Stop on error */ 1117 opts.noRecursiveExecute = false; /* Execute all .MAKE targets */ 1118 opts.noExecute = false; /* Execute all commands */ 1119 opts.query = false; 1120 opts.noBuiltins = false; /* Read the built-in rules */ 1121 opts.silent = false; /* Print commands as executed */ 1122 opts.touch = false; 1123 opts.printVars = PVM_NONE; 1124 Lst_Init(&opts.variables); 1125 opts.parseWarnFatal = false; 1126 opts.enterFlag = false; 1127 opts.varNoExportEnv = false; 1128 Lst_Init(&opts.create); 1129 } 1130 1131 /* 1132 * Initialize MAKE and .MAKE to the path of the executable, so that it can be 1133 * found by execvp(3) and the shells, even after a chdir. 1134 * 1135 * If it's a relative path and contains a '/', resolve it to an absolute path. 1136 * Otherwise keep it as is, assuming it will be found in the PATH. 1137 */ 1138 static void 1139 InitVarMake(const char *argv0) 1140 { 1141 const char *make = argv0; 1142 char pathbuf[MAXPATHLEN]; 1143 1144 if (argv0[0] != '/' && strchr(argv0, '/') != NULL) { 1145 const char *abspath = cached_realpath(argv0, pathbuf); 1146 struct stat st; 1147 if (abspath != NULL && abspath[0] == '/' && 1148 stat(make, &st) == 0) 1149 make = abspath; 1150 } 1151 1152 Global_Set("MAKE", make); 1153 Global_Set(".MAKE", make); 1154 } 1155 1156 /* 1157 * Add the directories from the colon-separated syspath to defSysIncPath. 1158 * After returning, the contents of syspath is unspecified. 1159 */ 1160 static void 1161 InitDefSysIncPath(char *syspath) 1162 { 1163 static char defsyspath[] = _PATH_DEFSYSPATH; 1164 char *start, *p; 1165 1166 /* 1167 * If no user-supplied system path was given (through the -m option) 1168 * add the directories from the DEFSYSPATH (more than one may be given 1169 * as dir1:...:dirn) to the system include path. 1170 */ 1171 if (syspath == NULL || syspath[0] == '\0') 1172 syspath = defsyspath; 1173 else 1174 syspath = bmake_strdup(syspath); 1175 1176 for (start = syspath; *start != '\0'; start = p) { 1177 for (p = start; *p != '\0' && *p != ':'; p++) 1178 continue; 1179 if (*p == ':') 1180 *p++ = '\0'; 1181 1182 /* look for magic parent directory search string */ 1183 if (strncmp(start, ".../", 4) == 0) { 1184 char *dir = Dir_FindHereOrAbove(curdir, start + 4); 1185 if (dir != NULL) { 1186 (void)SearchPath_Add(defSysIncPath, dir); 1187 free(dir); 1188 } 1189 } else { 1190 (void)SearchPath_Add(defSysIncPath, start); 1191 } 1192 } 1193 1194 if (syspath != defsyspath) 1195 free(syspath); 1196 } 1197 1198 static void 1199 ReadBuiltinRules(void) 1200 { 1201 StringListNode *ln; 1202 StringList sysMkFiles = LST_INIT; 1203 1204 SearchPath_Expand( 1205 Lst_IsEmpty(&sysIncPath->dirs) ? defSysIncPath : sysIncPath, 1206 _PATH_DEFSYSMK, 1207 &sysMkFiles); 1208 if (Lst_IsEmpty(&sysMkFiles)) 1209 Fatal("%s: no system rules (%s).", progname, _PATH_DEFSYSMK); 1210 1211 for (ln = sysMkFiles.first; ln != NULL; ln = ln->next) 1212 if (ReadMakefile(ln->datum)) 1213 break; 1214 1215 if (ln == NULL) 1216 Fatal("%s: cannot open %s.", 1217 progname, (const char *)sysMkFiles.first->datum); 1218 1219 Lst_DoneFree(&sysMkFiles); 1220 } 1221 1222 static void 1223 InitMaxJobs(void) 1224 { 1225 char *value; 1226 int n; 1227 1228 if (forceJobs || opts.compatMake || 1229 !Var_Exists(SCOPE_GLOBAL, ".MAKE.JOBS")) 1230 return; 1231 1232 value = Var_Subst("${.MAKE.JOBS}", SCOPE_GLOBAL, VARE_EVAL); 1233 /* TODO: handle errors */ 1234 n = (int)strtol(value, NULL, 0); 1235 if (n < 1) { 1236 (void)fprintf(stderr, 1237 "%s: illegal value for .MAKE.JOBS " 1238 "-- must be positive integer!\n", 1239 progname); 1240 exit(2); /* Not 1 so -q can distinguish error */ 1241 } 1242 1243 if (n != opts.maxJobs) { 1244 Global_Append(MAKEFLAGS, "-j"); 1245 Global_Append(MAKEFLAGS, value); 1246 } 1247 1248 opts.maxJobs = n; 1249 maxJobTokens = opts.maxJobs; 1250 forceJobs = true; 1251 free(value); 1252 } 1253 1254 /* 1255 * For compatibility, look at the directories in the VPATH variable 1256 * and add them to the search path, if the variable is defined. The 1257 * variable's value is in the same format as the PATH environment 1258 * variable, i.e. <directory>:<directory>:<directory>... 1259 */ 1260 static void 1261 InitVpath(void) 1262 { 1263 char *vpath, savec, *path; 1264 if (!Var_Exists(SCOPE_CMDLINE, "VPATH")) 1265 return; 1266 1267 vpath = Var_Subst("${VPATH}", SCOPE_CMDLINE, VARE_EVAL); 1268 /* TODO: handle errors */ 1269 path = vpath; 1270 do { 1271 char *p; 1272 /* skip to end of directory */ 1273 for (p = path; *p != ':' && *p != '\0'; p++) 1274 continue; 1275 /* Save terminator character so know when to stop */ 1276 savec = *p; 1277 *p = '\0'; 1278 /* Add directory to search path */ 1279 (void)SearchPath_Add(&dirSearchPath, path); 1280 *p = savec; 1281 path = p + 1; 1282 } while (savec == ':'); 1283 free(vpath); 1284 } 1285 1286 static void 1287 ReadAllMakefiles(const StringList *makefiles) 1288 { 1289 StringListNode *ln; 1290 1291 for (ln = makefiles->first; ln != NULL; ln = ln->next) { 1292 const char *fname = ln->datum; 1293 if (!ReadMakefile(fname)) 1294 Fatal("%s: cannot open %s.", progname, fname); 1295 } 1296 } 1297 1298 static void 1299 ReadFirstDefaultMakefile(void) 1300 { 1301 StringList makefiles = LST_INIT; 1302 StringListNode *ln; 1303 char *prefs = Var_Subst("${.MAKE.MAKEFILE_PREFERENCE}", 1304 SCOPE_CMDLINE, VARE_EVAL); 1305 /* TODO: handle errors */ 1306 1307 AppendWords(&makefiles, prefs); 1308 1309 for (ln = makefiles.first; ln != NULL; ln = ln->next) 1310 if (ReadMakefile(ln->datum)) 1311 break; 1312 1313 Lst_Done(&makefiles); 1314 free(prefs); 1315 } 1316 1317 /* 1318 * Initialize variables such as MAKE, MACHINE, .MAKEFLAGS. 1319 * Initialize a few modules. 1320 * Parse the arguments from MAKEFLAGS and the command line. 1321 */ 1322 static void 1323 main_Init(int argc, char **argv) 1324 { 1325 struct stat sa; 1326 const char *machine; 1327 const char *machine_arch; 1328 char *syspath = getenv("MAKESYSPATH"); 1329 struct utsname utsname; 1330 1331 /* default to writing debug to stderr */ 1332 opts.debug_file = stderr; 1333 1334 Str_Intern_Init(); 1335 HashTable_Init(&cached_realpaths); 1336 1337 #ifdef SIGINFO 1338 (void)bmake_signal(SIGINFO, siginfo); 1339 #endif 1340 1341 InitRandom(); 1342 1343 progname = str_basename(argv[0]); 1344 1345 UnlimitFiles(); 1346 1347 if (uname(&utsname) == -1) { 1348 (void)fprintf(stderr, "%s: uname failed (%s).\n", progname, 1349 strerror(errno)); 1350 exit(2); 1351 } 1352 1353 machine = InitVarMachine(&utsname); 1354 machine_arch = InitVarMachineArch(); 1355 1356 myPid = getpid(); /* remember this for vFork() */ 1357 1358 /* Just in case MAKEOBJDIR wants us to do something tricky. */ 1359 Targ_Init(); 1360 #ifdef FORCE_MAKE_OS 1361 Global_Set_ReadOnly(".MAKE.OS", FORCE_MAKE_OS); 1362 #else 1363 Global_Set_ReadOnly(".MAKE.OS", utsname.sysname); 1364 #endif 1365 Global_Set("MACHINE", machine); 1366 Global_Set("MACHINE_ARCH", machine_arch); 1367 #ifdef MAKE_VERSION 1368 Global_Set("MAKE_VERSION", MAKE_VERSION); 1369 #endif 1370 Global_Set_ReadOnly(".newline", "\n"); 1371 #ifndef MAKEFILE_PREFERENCE_LIST 1372 /* This is the traditional preference for makefiles. */ 1373 # define MAKEFILE_PREFERENCE_LIST "makefile Makefile" 1374 #endif 1375 Global_Set(".MAKE.MAKEFILE_PREFERENCE", MAKEFILE_PREFERENCE_LIST); 1376 Global_Set(".MAKE.DEPENDFILE", ".depend"); 1377 /* Tell makefiles like jobs.mk whether we support -jC */ 1378 #ifdef _SC_NPROCESSORS_ONLN 1379 Global_Set_ReadOnly(".MAKE.JOBS.C", "yes"); 1380 #else 1381 Global_Set_ReadOnly(".MAKE.JOBS.C", "no"); 1382 #endif 1383 1384 CmdOpts_Init(); 1385 allPrecious = false; /* Remove targets when interrupted */ 1386 deleteOnError = false; /* Historical default behavior */ 1387 jobsRunning = false; 1388 1389 maxJobTokens = opts.maxJobs; 1390 ignorePWD = false; 1391 1392 /* 1393 * Initialize the parsing, directory and variable modules to prepare 1394 * for the reading of inclusion paths and variable settings on the 1395 * command line 1396 */ 1397 1398 /* 1399 * Initialize various variables. 1400 * MAKE also gets this name, for compatibility 1401 * .MAKEFLAGS gets set to the empty string just in case. 1402 * MFLAGS also gets initialized empty, for compatibility. 1403 */ 1404 Parse_Init(); 1405 InitVarMake(argv[0]); 1406 Global_Set(MAKEFLAGS, ""); 1407 Global_Set(".MAKEOVERRIDES", ""); 1408 Global_Set("MFLAGS", ""); 1409 Global_Set(".ALLTARGETS", ""); 1410 Global_Set_ReadOnly(".MAKE.LEVEL.ENV", MAKE_LEVEL_ENV); 1411 1412 /* Set some other useful variables. */ 1413 { 1414 char buf[64]; 1415 const char *ep = getenv(MAKE_LEVEL_ENV); 1416 1417 makelevel = ep != NULL && ep[0] != '\0' ? atoi(ep) : 0; 1418 if (makelevel < 0) 1419 makelevel = 0; 1420 snprintf(buf, sizeof buf, "%d", makelevel); 1421 Global_Set(".MAKE.LEVEL", buf); 1422 snprintf(buf, sizeof buf, "%u", myPid); 1423 Global_Set_ReadOnly(".MAKE.PID", buf); 1424 snprintf(buf, sizeof buf, "%u", getppid()); 1425 Global_Set_ReadOnly(".MAKE.PPID", buf); 1426 snprintf(buf, sizeof buf, "%u", getuid()); 1427 Global_Set_ReadOnly(".MAKE.UID", buf); 1428 snprintf(buf, sizeof buf, "%u", getgid()); 1429 Global_Set_ReadOnly(".MAKE.GID", buf); 1430 } 1431 if (makelevel > 0) { 1432 char pn[1024]; 1433 snprintf(pn, sizeof pn, "%s[%d]", progname, makelevel); 1434 progname = bmake_strdup(pn); 1435 } 1436 1437 #ifdef USE_META 1438 meta_init(); 1439 #endif 1440 Dir_Init(); 1441 1442 { 1443 char *makeflags = explode(getenv("MAKEFLAGS")); 1444 Main_ParseArgLine(makeflags); 1445 free(makeflags); 1446 } 1447 1448 if (getcwd(curdir, MAXPATHLEN) == NULL) { 1449 (void)fprintf(stderr, "%s: getcwd: %s.\n", 1450 progname, strerror(errno)); 1451 exit(2); 1452 } 1453 1454 MainParseArgs(argc, argv); 1455 1456 if (opts.enterFlag) 1457 printf("%s: Entering directory `%s'\n", progname, curdir); 1458 1459 if (stat(curdir, &sa) == -1) { 1460 (void)fprintf(stderr, "%s: %s: %s.\n", 1461 progname, curdir, strerror(errno)); 1462 exit(2); 1463 } 1464 1465 #ifndef NO_PWD_OVERRIDE 1466 HandlePWD(&sa); 1467 #endif 1468 Global_Set(".CURDIR", curdir); 1469 1470 InitObjdir(machine, machine_arch); 1471 1472 Arch_Init(); 1473 Suff_Init(); 1474 Trace_Init(tracefile); 1475 1476 defaultNode = NULL; 1477 (void)time(&now); 1478 1479 Trace_Log(MAKESTART, NULL); 1480 1481 InitVarTargets(); 1482 1483 InitDefSysIncPath(syspath); 1484 } 1485 1486 /* 1487 * Read the system makefile followed by either makefile, Makefile or the 1488 * files given by the -f option. Exit on parse errors. 1489 */ 1490 static void 1491 main_ReadFiles(void) 1492 { 1493 1494 if (Lst_IsEmpty(&sysIncPath->dirs)) 1495 SearchPath_AddAll(sysIncPath, defSysIncPath); 1496 1497 Dir_SetSYSPATH(); 1498 if (!opts.noBuiltins) 1499 ReadBuiltinRules(); 1500 1501 posix_state = PS_MAYBE_NEXT_LINE; 1502 if (!Lst_IsEmpty(&opts.makefiles)) 1503 ReadAllMakefiles(&opts.makefiles); 1504 else 1505 ReadFirstDefaultMakefile(); 1506 } 1507 1508 /* Compute the dependency graph. */ 1509 static void 1510 main_PrepareMaking(void) 1511 { 1512 /* In particular suppress .depend for '-r -V .OBJDIR -f /dev/null' */ 1513 if (!opts.noBuiltins || opts.printVars == PVM_NONE) { 1514 makeDependfile = Var_Subst("${.MAKE.DEPENDFILE}", 1515 SCOPE_CMDLINE, VARE_EVAL); 1516 if (makeDependfile[0] != '\0') { 1517 /* TODO: handle errors */ 1518 doing_depend = true; 1519 (void)ReadMakefile(makeDependfile); 1520 doing_depend = false; 1521 } 1522 } 1523 1524 if (enterFlagObj) 1525 printf("%s: Entering directory `%s'\n", progname, objdir); 1526 1527 MakeMode(); 1528 1529 { 1530 FStr makeflags = Var_Value(SCOPE_GLOBAL, MAKEFLAGS); 1531 Global_Append("MFLAGS", makeflags.str); 1532 FStr_Done(&makeflags); 1533 } 1534 1535 InitMaxJobs(); 1536 1537 if (!opts.compatMake && !forceJobs) 1538 opts.compatMake = true; 1539 1540 if (!opts.compatMake) 1541 Job_ServerStart(maxJobTokens, jp_0, jp_1); 1542 DEBUG5(JOB, "job_pipe %d %d, maxjobs %d, tokens %d, compat %d\n", 1543 jp_0, jp_1, opts.maxJobs, maxJobTokens, opts.compatMake ? 1 : 0); 1544 1545 if (opts.printVars == PVM_NONE) 1546 Main_ExportMAKEFLAGS(true); /* initial export */ 1547 1548 InitVpath(); 1549 1550 /* 1551 * Now that all search paths have been read for suffixes et al, it's 1552 * time to add the default search path to their lists... 1553 */ 1554 Suff_ExtendPaths(); 1555 1556 /* 1557 * Propagate attributes through :: dependency lists. 1558 */ 1559 Targ_Propagate(); 1560 1561 /* print the initial graph, if the user requested it */ 1562 if (DEBUG(GRAPH1)) 1563 Targ_PrintGraph(1); 1564 } 1565 1566 /* 1567 * Make the targets. 1568 * If the -v or -V options are given, print variables instead. 1569 * Return whether any of the targets is out-of-date. 1570 */ 1571 static bool 1572 main_Run(void) 1573 { 1574 if (opts.printVars != PVM_NONE) { 1575 /* print the values of any variables requested by the user */ 1576 doPrintVars(); 1577 return false; 1578 } else { 1579 return runTargets(); 1580 } 1581 } 1582 1583 /* Clean up after making the targets. */ 1584 static void 1585 main_CleanUp(void) 1586 { 1587 #ifdef CLEANUP 1588 Lst_DoneFree(&opts.variables); 1589 Lst_DoneFree(&opts.makefiles); 1590 Lst_DoneFree(&opts.create); 1591 #endif 1592 1593 if (DEBUG(GRAPH2)) 1594 Targ_PrintGraph(2); 1595 1596 Trace_Log(MAKEEND, NULL); 1597 1598 if (enterFlagObj) 1599 printf("%s: Leaving directory `%s'\n", progname, objdir); 1600 if (opts.enterFlag) 1601 printf("%s: Leaving directory `%s'\n", progname, curdir); 1602 1603 Var_Stats(); 1604 Targ_Stats(); 1605 1606 #ifdef USE_META 1607 meta_finish(); 1608 #endif 1609 #ifdef CLEANUP 1610 Suff_End(); 1611 Targ_End(); 1612 Arch_End(); 1613 Parse_End(); 1614 Dir_End(); 1615 Job_End(); 1616 #endif 1617 Trace_End(); 1618 #ifdef CLEANUP 1619 Str_Intern_End(); 1620 #endif 1621 } 1622 1623 /* Determine the exit code. */ 1624 static int 1625 main_Exit(bool outOfDate) 1626 { 1627 if ((opts.strict && main_errors > 0) || parseErrors > 0) 1628 return 2; /* Not 1 so -q can distinguish error */ 1629 return outOfDate ? 1 : 0; 1630 } 1631 1632 int 1633 main(int argc, char **argv) 1634 { 1635 bool outOfDate; 1636 1637 main_Init(argc, argv); 1638 main_ReadFiles(); 1639 main_PrepareMaking(); 1640 outOfDate = main_Run(); 1641 main_CleanUp(); 1642 return main_Exit(outOfDate); 1643 } 1644 1645 /* 1646 * Open and parse the given makefile, with all its side effects. 1647 * Return false if the file could not be opened. 1648 */ 1649 static bool 1650 ReadMakefile(const char *fname) 1651 { 1652 int fd; 1653 char *name, *path = NULL; 1654 1655 if (strcmp(fname, "-") == 0) { 1656 Parse_File("(stdin)", -1); 1657 Var_Set(SCOPE_INTERNAL, "MAKEFILE", ""); 1658 } else { 1659 if (strncmp(fname, ".../", 4) == 0) { 1660 name = Dir_FindHereOrAbove(curdir, fname + 4); 1661 if (name != NULL) { 1662 /* Dir_FindHereOrAbove returns dirname */ 1663 path = str_concat3(name, "/", 1664 str_basename(fname)); 1665 free(name); 1666 fd = open(path, O_RDONLY); 1667 if (fd != -1) { 1668 fname = path; 1669 goto found; 1670 } 1671 } 1672 } 1673 /* if we've chdir'd, rebuild the path name */ 1674 if (strcmp(curdir, objdir) != 0 && *fname != '/') { 1675 path = str_concat3(curdir, "/", fname); 1676 fd = open(path, O_RDONLY); 1677 if (fd != -1) { 1678 fname = path; 1679 goto found; 1680 } 1681 free(path); 1682 1683 /* If curdir failed, try objdir (ala .depend) */ 1684 path = str_concat3(objdir, "/", fname); 1685 fd = open(path, O_RDONLY); 1686 if (fd != -1) { 1687 fname = path; 1688 goto found; 1689 } 1690 } else { 1691 fd = open(fname, O_RDONLY); 1692 if (fd != -1) 1693 goto found; 1694 } 1695 /* look in -I and system include directories. */ 1696 name = Dir_FindFile(fname, parseIncPath); 1697 if (name == NULL) { 1698 SearchPath *sysInc = Lst_IsEmpty(&sysIncPath->dirs) 1699 ? defSysIncPath : sysIncPath; 1700 name = Dir_FindFile(fname, sysInc); 1701 } 1702 if (name == NULL || (fd = open(name, O_RDONLY)) == -1) { 1703 free(name); 1704 free(path); 1705 return false; 1706 } 1707 fname = name; 1708 /* 1709 * set the MAKEFILE variable desired by System V fans -- the 1710 * placement of the setting here means it gets set to the last 1711 * makefile specified, as it is set by SysV make. 1712 */ 1713 found: 1714 if (!doing_depend) 1715 Var_Set(SCOPE_INTERNAL, "MAKEFILE", fname); 1716 Parse_File(fname, fd); 1717 } 1718 free(path); 1719 return true; 1720 } 1721 1722 /* populate av for Cmd_Exec and Compat_RunCommand */ 1723 int 1724 Cmd_Argv(const char *cmd, size_t cmd_len, const char **av, size_t avsz, 1725 char *cmd_file, size_t cmd_filesz, bool eflag, bool xflag) 1726 { 1727 int ac = 0; 1728 int cmd_fd = -1; 1729 1730 if (shellPath == NULL) 1731 Shell_Init(); 1732 1733 if (cmd_file != NULL) { 1734 if (cmd_len == 0) 1735 cmd_len = strlen(cmd); 1736 1737 if (cmd_len > MAKE_CMDLEN_LIMIT) { 1738 cmd_fd = mkTempFile(NULL, cmd_file, cmd_filesz); 1739 if (cmd_fd >= 0) { 1740 ssize_t n; 1741 1742 n = write(cmd_fd, cmd, cmd_len); 1743 close(cmd_fd); 1744 if (n < (ssize_t)cmd_len) { 1745 unlink(cmd_file); 1746 cmd_fd = -1; 1747 } 1748 } 1749 } else 1750 cmd_file[0] = '\0'; 1751 } 1752 1753 if (avsz < 4 || (eflag && avsz < 5)) 1754 return -1; 1755 1756 /* The following works for any of the builtin shell specs. */ 1757 av[ac++] = shellPath; 1758 if (eflag) 1759 av[ac++] = shellErrFlag; 1760 if (cmd_fd >= 0) { 1761 if (xflag) 1762 av[ac++] = "-x"; 1763 av[ac++] = cmd_file; 1764 } else { 1765 av[ac++] = xflag ? "-xc" : "-c"; 1766 av[ac++] = cmd; 1767 } 1768 av[ac] = NULL; 1769 return ac; 1770 } 1771 1772 /* 1773 * Execute the command in cmd, and return its output (only stdout, not 1774 * stderr, possibly empty). In the output, replace newlines with spaces. 1775 */ 1776 char * 1777 Cmd_Exec(const char *cmd, char **error) 1778 { 1779 const char *args[4]; /* Arguments for invoking the shell */ 1780 int pipefds[2]; 1781 int cpid; /* Child PID */ 1782 int pid; /* PID from wait() */ 1783 WAIT_T status; /* command exit status */ 1784 Buffer buf; /* buffer to store the result */ 1785 ssize_t bytes_read; 1786 char *output; 1787 char *p; 1788 int saved_errno; 1789 char cmd_file[MAXPATHLEN]; 1790 1791 DEBUG1(VAR, "Capturing the output of command \"%s\"\n", cmd); 1792 1793 if (Cmd_Argv(cmd, 0, args, 4, cmd_file, sizeof(cmd_file), false, false) < 0 1794 || pipe(pipefds) == -1) { 1795 *error = str_concat3( 1796 "Couldn't create pipe for \"", cmd, "\""); 1797 return bmake_strdup(""); 1798 } 1799 1800 Var_ReexportVars(SCOPE_GLOBAL); 1801 1802 switch (cpid = FORK_FUNCTION()) { 1803 case 0: 1804 (void)close(pipefds[0]); 1805 (void)dup2(pipefds[1], STDOUT_FILENO); 1806 (void)close(pipefds[1]); 1807 1808 (void)execv(shellPath, UNCONST(args)); 1809 _exit(1); 1810 /* NOTREACHED */ 1811 1812 case -1: 1813 *error = str_concat3("Couldn't exec \"", cmd, "\""); 1814 return bmake_strdup(""); 1815 } 1816 1817 (void)close(pipefds[1]); /* No need for the writing half */ 1818 1819 saved_errno = 0; 1820 Buf_Init(&buf); 1821 1822 do { 1823 char result[BUFSIZ]; 1824 bytes_read = read(pipefds[0], result, sizeof result); 1825 if (bytes_read > 0) 1826 Buf_AddBytes(&buf, result, (size_t)bytes_read); 1827 } while (bytes_read > 0 || (bytes_read == -1 && errno == EINTR)); 1828 if (bytes_read == -1) 1829 saved_errno = errno; 1830 1831 (void)close(pipefds[0]); /* Close the input side of the pipe. */ 1832 1833 while ((pid = waitpid(cpid, &status, 0)) != cpid && pid >= 0) 1834 JobReapChild(pid, status, false); 1835 1836 if (Buf_EndsWith(&buf, '\n')) 1837 buf.data[buf.len - 1] = '\0'; 1838 1839 output = Buf_DoneData(&buf); 1840 for (p = output; *p != '\0'; p++) 1841 if (*p == '\n') 1842 *p = ' '; 1843 1844 if (WIFSIGNALED(status)) 1845 *error = str_concat3("\"", cmd, "\" exited on a signal"); 1846 else if (WEXITSTATUS(status) != 0) { 1847 Buffer errBuf; 1848 Buf_Init(&errBuf); 1849 Buf_AddStr(&errBuf, "Command \""); 1850 Buf_AddStr(&errBuf, cmd); 1851 Buf_AddStr(&errBuf, "\" exited with status "); 1852 Buf_AddInt(&errBuf, WEXITSTATUS(status)); 1853 *error = Buf_DoneData(&errBuf); 1854 } else if (saved_errno != 0) 1855 *error = str_concat3( 1856 "Couldn't read shell's output for \"", cmd, "\""); 1857 else 1858 *error = NULL; 1859 if (cmd_file[0] != '\0') 1860 unlink(cmd_file); 1861 return output; 1862 } 1863 1864 /* 1865 * Print a printf-style error message. 1866 * 1867 * In default mode, this error message has no consequences, for compatibility 1868 * reasons, in particular it does not affect the exit status. Only in lint 1869 * mode (-dL) it does. 1870 */ 1871 void 1872 Error(const char *fmt, ...) 1873 { 1874 va_list ap; 1875 FILE *f; 1876 1877 f = opts.debug_file; 1878 if (f == stdout) 1879 f = stderr; 1880 (void)fflush(stdout); 1881 1882 for (;;) { 1883 fprintf(f, "%s: ", progname); 1884 va_start(ap, fmt); 1885 (void)vfprintf(f, fmt, ap); 1886 va_end(ap); 1887 (void)fprintf(f, "\n"); 1888 (void)fflush(f); 1889 if (f == stderr) 1890 break; 1891 f = stderr; 1892 } 1893 main_errors++; 1894 } 1895 1896 /* 1897 * Wait for any running jobs to finish, then produce an error message, 1898 * finally exit immediately. 1899 * 1900 * Exiting immediately differs from Parse_Error, which exits only after the 1901 * current top-level makefile has been parsed completely. 1902 */ 1903 void 1904 Fatal(const char *fmt, ...) 1905 { 1906 va_list ap; 1907 1908 if (jobsRunning) 1909 Job_Wait(); 1910 1911 (void)fflush(stdout); 1912 fprintf(stderr, "%s: ", progname); 1913 va_start(ap, fmt); 1914 (void)vfprintf(stderr, fmt, ap); 1915 va_end(ap); 1916 (void)fprintf(stderr, "\n"); 1917 (void)fflush(stderr); 1918 PrintStackTrace(true); 1919 1920 PrintOnError(NULL, "\n"); 1921 1922 if (DEBUG(GRAPH2) || DEBUG(GRAPH3)) 1923 Targ_PrintGraph(2); 1924 Trace_Log(MAKEERROR, NULL); 1925 exit(2); /* Not 1 so -q can distinguish error */ 1926 } 1927 1928 /* 1929 * Major exception once jobs are being created. 1930 * Kills all jobs, prints a message and exits. 1931 */ 1932 void 1933 Punt(const char *fmt, ...) 1934 { 1935 va_list ap; 1936 1937 (void)fflush(stdout); 1938 (void)fprintf(stderr, "%s: ", progname); 1939 va_start(ap, fmt); 1940 (void)vfprintf(stderr, fmt, ap); 1941 va_end(ap); 1942 (void)fprintf(stderr, "\n"); 1943 (void)fflush(stderr); 1944 1945 PrintOnError(NULL, "\n"); 1946 1947 DieHorribly(); 1948 } 1949 1950 /* Exit without giving a message. */ 1951 void 1952 DieHorribly(void) 1953 { 1954 if (jobsRunning) 1955 Job_AbortAll(); 1956 if (DEBUG(GRAPH2)) 1957 Targ_PrintGraph(2); 1958 Trace_Log(MAKEERROR, NULL); 1959 exit(2); /* Not 1 so -q can distinguish error */ 1960 } 1961 1962 int 1963 unlink_file(const char *file) 1964 { 1965 struct stat st; 1966 1967 if (lstat(file, &st) == -1) 1968 return -1; 1969 1970 if (S_ISDIR(st.st_mode)) { 1971 /* 1972 * POSIX says for unlink: "The path argument shall not name 1973 * a directory unless [...]". 1974 */ 1975 errno = EISDIR; 1976 return -1; 1977 } 1978 return unlink(file); 1979 } 1980 1981 static void 1982 write_all(int fd, const void *data, size_t n) 1983 { 1984 const char *mem = data; 1985 1986 while (n > 0) { 1987 ssize_t written = write(fd, mem, n); 1988 /* XXX: Should this EAGAIN be EINTR? */ 1989 if (written == -1 && errno == EAGAIN) 1990 continue; 1991 if (written == -1) 1992 break; 1993 mem += written; 1994 n -= (size_t)written; 1995 } 1996 } 1997 1998 /* Print why exec failed, avoiding stdio. */ 1999 void MAKE_ATTR_DEAD 2000 execDie(const char *func, const char *arg) 2001 { 2002 char msg[1024]; 2003 int len; 2004 2005 len = snprintf(msg, sizeof(msg), "%s: %s(%s) failed (%s)\n", 2006 progname, func, arg, strerror(errno)); 2007 write_all(STDERR_FILENO, msg, (size_t)len); 2008 _exit(1); 2009 } 2010 2011 static void 2012 purge_relative_cached_realpaths(void) 2013 { 2014 HashIter hi; 2015 bool more; 2016 2017 HashIter_Init(&hi, &cached_realpaths); 2018 more = HashIter_Next(&hi); 2019 while (more) { 2020 HashEntry *he = hi.entry; 2021 more = HashIter_Next(&hi); 2022 if (he->key[0] != '/') { 2023 DEBUG1(DIR, "cached_realpath: purging %s\n", he->key); 2024 free(he->value); 2025 HashTable_DeleteEntry(&cached_realpaths, he); 2026 } 2027 } 2028 } 2029 2030 const char * 2031 cached_realpath(const char *pathname, char *resolved) 2032 { 2033 const char *rp; 2034 2035 if (pathname == NULL || pathname[0] == '\0') 2036 return NULL; 2037 2038 rp = HashTable_FindValue(&cached_realpaths, pathname); 2039 if (rp != NULL) { 2040 snprintf(resolved, MAXPATHLEN, "%s", rp); 2041 return resolved; 2042 } 2043 2044 rp = realpath(pathname, resolved); 2045 if (rp != NULL) { 2046 HashTable_Set(&cached_realpaths, pathname, bmake_strdup(rp)); 2047 DEBUG2(DIR, "cached_realpath: %s -> %s\n", pathname, rp); 2048 return resolved; 2049 } 2050 2051 /* should we negative-cache? */ 2052 return NULL; 2053 } 2054 2055 /* 2056 * Return true if we should die without noise. 2057 * For example our failing child was a sub-make or failure happened elsewhere. 2058 */ 2059 bool 2060 shouldDieQuietly(GNode *gn, int bf) 2061 { 2062 static int quietly = -1; 2063 2064 if (quietly < 0) { 2065 if (DEBUG(JOB) || 2066 !GetBooleanExpr("${.MAKE.DIE_QUIETLY}", true)) 2067 quietly = 0; 2068 else if (bf >= 0) 2069 quietly = bf; 2070 else 2071 quietly = (gn != NULL && (gn->type & OP_MAKE)) ? 1 : 0; 2072 } 2073 return quietly != 0; 2074 } 2075 2076 static void 2077 SetErrorVars(GNode *gn) 2078 { 2079 StringListNode *ln; 2080 char sts[16]; 2081 2082 /* 2083 * We can print this even if there is no .ERROR target. 2084 */ 2085 snprintf(sts, sizeof(sts), "%d", gn->exit_status); 2086 Global_Set(".ERROR_EXIT", sts); 2087 Global_Set(".ERROR_TARGET", gn->name); 2088 Global_Delete(".ERROR_CMD"); 2089 2090 for (ln = gn->commands.first; ln != NULL; ln = ln->next) { 2091 const char *cmd = ln->datum; 2092 2093 if (cmd == NULL) 2094 break; 2095 Global_Append(".ERROR_CMD", cmd); 2096 } 2097 } 2098 2099 /* 2100 * Print some helpful information in case of an error. 2101 * The caller should exit soon after calling this function. 2102 */ 2103 void 2104 PrintOnError(GNode *gn, const char *msg) 2105 { 2106 static GNode *errorNode = NULL; 2107 StringListNode *ln; 2108 2109 if (DEBUG(HASH)) { 2110 Targ_Stats(); 2111 Var_Stats(); 2112 } 2113 2114 if (errorNode != NULL) 2115 return; /* we've been here! */ 2116 2117 printf("%s%s: stopped", msg, progname); 2118 ln = opts.create.first; 2119 if (ln != NULL || mainNode != NULL) { 2120 printf(" making \""); 2121 if (ln != NULL) { 2122 printf("%s", (const char *)ln->datum); 2123 for (ln = ln->next; ln != NULL; ln = ln->next) 2124 printf(" %s", (const char *)ln->datum); 2125 } else 2126 printf("%s", mainNode->name); 2127 printf("\""); 2128 } 2129 printf(" in %s\n", curdir); 2130 2131 /* we generally want to keep quiet if a sub-make died */ 2132 if (shouldDieQuietly(gn, -1)) 2133 return; 2134 2135 if (gn != NULL) 2136 SetErrorVars(gn); 2137 2138 { 2139 char *errorVarsValues = Var_Subst( 2140 "${MAKE_PRINT_VAR_ON_ERROR:@v@$v='${$v}'\n@}", 2141 SCOPE_GLOBAL, VARE_EVAL); 2142 /* TODO: handle errors */ 2143 printf("%s", errorVarsValues); 2144 free(errorVarsValues); 2145 } 2146 2147 fflush(stdout); 2148 2149 /* 2150 * Finally, see if there is a .ERROR target, and run it if so. 2151 */ 2152 errorNode = Targ_FindNode(".ERROR"); 2153 if (errorNode != NULL) { 2154 errorNode->type |= OP_SPECIAL; 2155 Compat_Make(errorNode, errorNode); 2156 } 2157 } 2158 2159 void 2160 Main_ExportMAKEFLAGS(bool first) 2161 { 2162 static bool once = true; 2163 char *flags; 2164 2165 if (once != first) 2166 return; 2167 once = false; 2168 2169 flags = Var_Subst( 2170 "${.MAKEFLAGS} ${.MAKEOVERRIDES:O:u:@v@$v=${$v:Q}@}", 2171 SCOPE_CMDLINE, VARE_EVAL); 2172 /* TODO: handle errors */ 2173 if (flags[0] != '\0') 2174 setenv("MAKEFLAGS", flags, 1); 2175 free(flags); 2176 } 2177 2178 char * 2179 getTmpdir(void) 2180 { 2181 static char *tmpdir = NULL; 2182 struct stat st; 2183 2184 if (tmpdir != NULL) 2185 return tmpdir; 2186 2187 /* Honor $TMPDIR if it is valid, strip a trailing '/'. */ 2188 tmpdir = Var_Subst("${TMPDIR:tA:U" _PATH_TMP ":S,/$,,W}/", 2189 SCOPE_GLOBAL, VARE_EVAL); 2190 /* TODO: handle errors */ 2191 2192 if (stat(tmpdir, &st) < 0 || !S_ISDIR(st.st_mode)) { 2193 free(tmpdir); 2194 tmpdir = bmake_strdup(_PATH_TMP); 2195 } 2196 return tmpdir; 2197 } 2198 2199 /* 2200 * Create and open a temp file using "pattern". 2201 * If tfile is provided, set it to a copy of the filename created. 2202 * Otherwise unlink the file once open. 2203 */ 2204 int 2205 mkTempFile(const char *pattern, char *tfile, size_t tfile_sz) 2206 { 2207 static char *tmpdir = NULL; 2208 char tbuf[MAXPATHLEN]; 2209 int fd; 2210 2211 if (pattern == NULL) 2212 pattern = TMPPAT; 2213 if (tmpdir == NULL) 2214 tmpdir = getTmpdir(); 2215 if (tfile == NULL) { 2216 tfile = tbuf; 2217 tfile_sz = sizeof tbuf; 2218 } 2219 2220 if (pattern[0] == '/') 2221 snprintf(tfile, tfile_sz, "%s", pattern); 2222 else 2223 snprintf(tfile, tfile_sz, "%s%s", tmpdir, pattern); 2224 2225 if ((fd = mkstemp(tfile)) < 0) 2226 Punt("Could not create temporary file %s: %s", tfile, 2227 strerror(errno)); 2228 if (tfile == tbuf) 2229 unlink(tfile); /* we just want the descriptor */ 2230 2231 return fd; 2232 } 2233 2234 /* 2235 * Convert a string representation of a boolean into a boolean value. 2236 * Anything that looks like "No", "False", "Off", "0" etc. is false, 2237 * the empty string is the fallback, everything else is true. 2238 */ 2239 bool 2240 ParseBoolean(const char *s, bool fallback) 2241 { 2242 char ch = ch_tolower(s[0]); 2243 if (ch == '\0') 2244 return fallback; 2245 if (ch == '0' || ch == 'f' || ch == 'n') 2246 return false; 2247 if (ch == 'o') 2248 return ch_tolower(s[1]) != 'f'; 2249 return true; 2250 } 2251