main.c revision 1.531
1 /* $NetBSD: main.c,v 1.531 2021/02/05 04:41:17 rillig Exp $ */ 2 3 /* 4 * Copyright (c) 1988, 1989, 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Adam de Boor. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 /* 36 * Copyright (c) 1989 by Berkeley Softworks 37 * All rights reserved. 38 * 39 * This code is derived from software contributed to Berkeley by 40 * Adam de Boor. 41 * 42 * Redistribution and use in source and binary forms, with or without 43 * modification, are permitted provided that the following conditions 44 * are met: 45 * 1. Redistributions of source code must retain the above copyright 46 * notice, this list of conditions and the following disclaimer. 47 * 2. Redistributions in binary form must reproduce the above copyright 48 * notice, this list of conditions and the following disclaimer in the 49 * documentation and/or other materials provided with the distribution. 50 * 3. All advertising materials mentioning features or use of this software 51 * must display the following acknowledgement: 52 * This product includes software developed by the University of 53 * California, Berkeley and its contributors. 54 * 4. Neither the name of the University nor the names of its contributors 55 * may be used to endorse or promote products derived from this software 56 * without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 68 * SUCH DAMAGE. 69 */ 70 71 /* 72 * The main file for this entire program. Exit routines etc. reside here. 73 * 74 * Utility functions defined in this file: 75 * 76 * Main_ParseArgLine 77 * Parse and process command line arguments from a 78 * single string. Used to implement the special targets 79 * .MFLAGS and .MAKEFLAGS. 80 * 81 * Error Print a tagged error message. 82 * 83 * Fatal Print an error message and exit. 84 * 85 * Punt Abort all jobs and exit with a message. 86 * 87 * Finish Finish things up by printing the number of errors 88 * that occurred, and exit. 89 */ 90 91 #include <sys/types.h> 92 #include <sys/time.h> 93 #include <sys/param.h> 94 #include <sys/resource.h> 95 #include <sys/stat.h> 96 #ifdef MAKE_NATIVE 97 #include <sys/sysctl.h> 98 #endif 99 #include <sys/utsname.h> 100 #include <sys/wait.h> 101 102 #include <errno.h> 103 #include <signal.h> 104 #include <stdarg.h> 105 #include <time.h> 106 107 #include "make.h" 108 #include "dir.h" 109 #include "job.h" 110 #include "pathnames.h" 111 #include "trace.h" 112 113 /* "@(#)main.c 8.3 (Berkeley) 3/19/94" */ 114 MAKE_RCSID("$NetBSD: main.c,v 1.531 2021/02/05 04:41:17 rillig Exp $"); 115 #if defined(MAKE_NATIVE) && !defined(lint) 116 __COPYRIGHT("@(#) Copyright (c) 1988, 1989, 1990, 1993 " 117 "The Regents of the University of California. " 118 "All rights reserved."); 119 #endif 120 121 CmdOpts opts; 122 time_t now; /* Time at start of make */ 123 GNode *defaultNode; /* .DEFAULT node */ 124 Boolean allPrecious; /* .PRECIOUS given on line by itself */ 125 Boolean deleteOnError; /* .DELETE_ON_ERROR: set */ 126 127 static int maxJobTokens; /* -j argument */ 128 Boolean enterFlagObj; /* -w and objdir != srcdir */ 129 130 static int jp_0 = -1, jp_1 = -1; /* ends of parent job pipe */ 131 Boolean doing_depend; /* Set while reading .depend */ 132 static Boolean jobsRunning; /* TRUE if the jobs might be running */ 133 static const char *tracefile; 134 static int ReadMakefile(const char *); 135 static void purge_relative_cached_realpaths(void); 136 137 static Boolean 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 Boolean 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 size_t len; 157 char *nf, *st; 158 const char *f; 159 160 if (flags == NULL) 161 return NULL; 162 163 for (f = flags; *f != '\0'; f++) 164 if (!ch_isalpha(*f)) 165 break; 166 167 if (*f != '\0') 168 return bmake_strdup(flags); 169 170 len = strlen(flags); 171 st = nf = bmake_malloc(len * 3 + 1); 172 while (*flags != '\0') { 173 *nf++ = '-'; 174 *nf++ = *flags++; 175 *nf++ = ' '; 176 } 177 *nf = '\0'; 178 return st; 179 } 180 181 /* 182 * usage -- 183 * exit with usage message 184 */ 185 MAKE_ATTR_DEAD static void 186 usage(void) 187 { 188 size_t prognameLen = strcspn(progname, "["); 189 190 (void)fprintf(stderr, 191 "usage: %.*s [-BeikNnqrSstWwX]\n" 192 " [-C directory] [-D variable] [-d flags] [-f makefile]\n" 193 " [-I directory] [-J private] [-j max_jobs] [-m directory] [-T file]\n" 194 " [-V variable] [-v variable] [variable=value] [target ...]\n", 195 (int)prognameLen, progname); 196 exit(2); 197 } 198 199 static void 200 MainParseArgDebugFile(const char *arg) 201 { 202 const char *mode; 203 size_t len; 204 char *fname; 205 206 if (opts.debug_file != stdout && opts.debug_file != stderr) 207 fclose(opts.debug_file); 208 209 if (*arg == '+') { 210 arg++; 211 mode = "a"; 212 } else 213 mode = "w"; 214 215 if (strcmp(arg, "stdout") == 0) { 216 opts.debug_file = stdout; 217 return; 218 } 219 if (strcmp(arg, "stderr") == 0) { 220 opts.debug_file = stderr; 221 return; 222 } 223 224 len = strlen(arg); 225 fname = bmake_malloc(len + 20); 226 memcpy(fname, arg, len + 1); 227 228 /* Let the filename be modified by the pid */ 229 if (strcmp(fname + len - 3, ".%d") == 0) 230 snprintf(fname + len - 2, 20, "%d", getpid()); 231 232 opts.debug_file = fopen(fname, mode); 233 if (opts.debug_file == NULL) { 234 fprintf(stderr, "Cannot open debug file %s\n", 235 fname); 236 usage(); 237 } 238 free(fname); 239 } 240 241 static void 242 MainParseArgDebug(const char *argvalue) 243 { 244 const char *modules; 245 DebugFlags debug = opts.debug; 246 247 for (modules = argvalue; *modules != '\0'; modules++) { 248 switch (*modules) { 249 case '0': /* undocumented, only intended for tests */ 250 debug = DEBUG_NONE; 251 break; 252 case 'A': 253 debug = DEBUG_ALL; 254 break; 255 case 'a': 256 debug |= DEBUG_ARCH; 257 break; 258 case 'C': 259 debug |= DEBUG_CWD; 260 break; 261 case 'c': 262 debug |= DEBUG_COND; 263 break; 264 case 'd': 265 debug |= DEBUG_DIR; 266 break; 267 case 'e': 268 debug |= DEBUG_ERROR; 269 break; 270 case 'f': 271 debug |= DEBUG_FOR; 272 break; 273 case 'g': 274 if (modules[1] == '1') { 275 debug |= DEBUG_GRAPH1; 276 modules++; 277 } else if (modules[1] == '2') { 278 debug |= DEBUG_GRAPH2; 279 modules++; 280 } else if (modules[1] == '3') { 281 debug |= DEBUG_GRAPH3; 282 modules++; 283 } 284 break; 285 case 'h': 286 debug |= DEBUG_HASH; 287 break; 288 case 'j': 289 debug |= DEBUG_JOB; 290 break; 291 case 'L': 292 opts.strict = TRUE; 293 break; 294 case 'l': 295 debug |= DEBUG_LOUD; 296 break; 297 case 'M': 298 debug |= DEBUG_META; 299 break; 300 case 'm': 301 debug |= DEBUG_MAKE; 302 break; 303 case 'n': 304 debug |= DEBUG_SCRIPT; 305 break; 306 case 'p': 307 debug |= DEBUG_PARSE; 308 break; 309 case 's': 310 debug |= DEBUG_SUFF; 311 break; 312 case 't': 313 debug |= DEBUG_TARG; 314 break; 315 case 'V': 316 opts.debugVflag = TRUE; 317 break; 318 case 'v': 319 debug |= DEBUG_VAR; 320 break; 321 case 'x': 322 debug |= DEBUG_SHELL; 323 break; 324 case 'F': 325 MainParseArgDebugFile(modules + 1); 326 goto debug_setbuf; 327 default: 328 (void)fprintf(stderr, 329 "%s: illegal argument to d option -- %c\n", 330 progname, *modules); 331 usage(); 332 } 333 } 334 335 debug_setbuf: 336 opts.debug = debug; 337 338 /* 339 * Make the debug_file unbuffered, and make 340 * stdout line buffered (unless debugfile == stdout). 341 */ 342 setvbuf(opts.debug_file, NULL, _IONBF, 0); 343 if (opts.debug_file != stdout) { 344 setvbuf(stdout, NULL, _IOLBF, 0); 345 } 346 } 347 348 /* Is path relative, or does it contain any relative component "." or ".."? */ 349 static Boolean 350 IsRelativePath(const char *path) 351 { 352 const char *cp; 353 354 if (path[0] != '/') 355 return TRUE; 356 cp = path; 357 while ((cp = strstr(cp, "/.")) != NULL) { 358 cp += 2; 359 if (*cp == '.') 360 cp++; 361 if (cp[0] == '/' || cp[0] == '\0') 362 return TRUE; 363 } 364 return FALSE; 365 } 366 367 static void 368 MainParseArgChdir(const char *argvalue) 369 { 370 struct stat sa, sb; 371 372 if (chdir(argvalue) == -1) { 373 (void)fprintf(stderr, "%s: chdir %s: %s\n", 374 progname, argvalue, strerror(errno)); 375 exit(2); /* Not 1 so -q can distinguish error */ 376 } 377 if (getcwd(curdir, MAXPATHLEN) == NULL) { 378 (void)fprintf(stderr, "%s: %s.\n", progname, strerror(errno)); 379 exit(2); 380 } 381 if (!IsRelativePath(argvalue) && 382 stat(argvalue, &sa) != -1 && 383 stat(curdir, &sb) != -1 && 384 sa.st_ino == sb.st_ino && 385 sa.st_dev == sb.st_dev) 386 strncpy(curdir, argvalue, MAXPATHLEN); 387 ignorePWD = TRUE; 388 } 389 390 static void 391 MainParseArgJobsInternal(const char *argvalue) 392 { 393 char end; 394 if (sscanf(argvalue, "%d,%d%c", &jp_0, &jp_1, &end) != 2) { 395 (void)fprintf(stderr, 396 "%s: internal error -- J option malformed (%s)\n", 397 progname, argvalue); 398 usage(); 399 } 400 if ((fcntl(jp_0, F_GETFD, 0) < 0) || 401 (fcntl(jp_1, F_GETFD, 0) < 0)) { 402 #if 0 403 (void)fprintf(stderr, 404 "%s: ###### warning -- J descriptors were closed!\n", 405 progname); 406 exit(2); 407 #endif 408 jp_0 = -1; 409 jp_1 = -1; 410 opts.compatMake = TRUE; 411 } else { 412 Global_Append(MAKEFLAGS, "-J"); 413 Global_Append(MAKEFLAGS, argvalue); 414 } 415 } 416 417 static void 418 MainParseArgJobs(const char *argvalue) 419 { 420 char *p; 421 422 forceJobs = TRUE; 423 opts.maxJobs = (int)strtol(argvalue, &p, 0); 424 if (*p != '\0' || opts.maxJobs < 1) { 425 (void)fprintf(stderr, 426 "%s: illegal argument to -j -- must be positive integer!\n", 427 progname); 428 exit(2); /* Not 1 so -q can distinguish error */ 429 } 430 Global_Append(MAKEFLAGS, "-j"); 431 Global_Append(MAKEFLAGS, argvalue); 432 Global_Set(".MAKE.JOBS", argvalue); 433 maxJobTokens = opts.maxJobs; 434 } 435 436 static void 437 MainParseArgSysInc(const char *argvalue) 438 { 439 /* look for magic parent directory search string */ 440 if (strncmp(".../", argvalue, 4) == 0) { 441 char *found_path = Dir_FindHereOrAbove(curdir, argvalue + 4); 442 if (found_path == NULL) 443 return; 444 (void)SearchPath_Add(sysIncPath, found_path); 445 free(found_path); 446 } else { 447 (void)SearchPath_Add(sysIncPath, argvalue); 448 } 449 Global_Append(MAKEFLAGS, "-m"); 450 Global_Append(MAKEFLAGS, argvalue); 451 } 452 453 static Boolean 454 MainParseArg(char c, const char *argvalue) 455 { 456 switch (c) { 457 case '\0': 458 break; 459 case 'B': 460 opts.compatMake = TRUE; 461 Global_Append(MAKEFLAGS, "-B"); 462 Global_Set(MAKE_MODE, "compat"); 463 break; 464 case 'C': 465 MainParseArgChdir(argvalue); 466 break; 467 case 'D': 468 if (argvalue[0] == '\0') return FALSE; 469 Global_SetExpand(argvalue, "1"); 470 Global_Append(MAKEFLAGS, "-D"); 471 Global_Append(MAKEFLAGS, argvalue); 472 break; 473 case 'I': 474 Parse_AddIncludeDir(argvalue); 475 Global_Append(MAKEFLAGS, "-I"); 476 Global_Append(MAKEFLAGS, argvalue); 477 break; 478 case 'J': 479 MainParseArgJobsInternal(argvalue); 480 break; 481 case 'N': 482 opts.noExecute = TRUE; 483 opts.noRecursiveExecute = TRUE; 484 Global_Append(MAKEFLAGS, "-N"); 485 break; 486 case 'S': 487 opts.keepgoing = FALSE; 488 Global_Append(MAKEFLAGS, "-S"); 489 break; 490 case 'T': 491 tracefile = bmake_strdup(argvalue); 492 Global_Append(MAKEFLAGS, "-T"); 493 Global_Append(MAKEFLAGS, argvalue); 494 break; 495 case 'V': 496 case 'v': 497 opts.printVars = c == 'v' ? PVM_EXPANDED : PVM_UNEXPANDED; 498 Lst_Append(&opts.variables, bmake_strdup(argvalue)); 499 /* XXX: Why always -V? */ 500 Global_Append(MAKEFLAGS, "-V"); 501 Global_Append(MAKEFLAGS, argvalue); 502 break; 503 case 'W': 504 opts.parseWarnFatal = TRUE; 505 /* XXX: why no Var_Append? */ 506 break; 507 case 'X': 508 opts.varNoExportEnv = TRUE; 509 Global_Append(MAKEFLAGS, "-X"); 510 break; 511 case 'd': 512 /* If '-d-opts' don't pass to children */ 513 if (argvalue[0] == '-') 514 argvalue++; 515 else { 516 Global_Append(MAKEFLAGS, "-d"); 517 Global_Append(MAKEFLAGS, argvalue); 518 } 519 MainParseArgDebug(argvalue); 520 break; 521 case 'e': 522 opts.checkEnvFirst = TRUE; 523 Global_Append(MAKEFLAGS, "-e"); 524 break; 525 case 'f': 526 Lst_Append(&opts.makefiles, bmake_strdup(argvalue)); 527 break; 528 case 'i': 529 opts.ignoreErrors = TRUE; 530 Global_Append(MAKEFLAGS, "-i"); 531 break; 532 case 'j': 533 MainParseArgJobs(argvalue); 534 break; 535 case 'k': 536 opts.keepgoing = TRUE; 537 Global_Append(MAKEFLAGS, "-k"); 538 break; 539 case 'm': 540 MainParseArgSysInc(argvalue); 541 /* XXX: why no Var_Append? */ 542 break; 543 case 'n': 544 opts.noExecute = TRUE; 545 Global_Append(MAKEFLAGS, "-n"); 546 break; 547 case 'q': 548 opts.queryFlag = TRUE; 549 /* Kind of nonsensical, wot? */ 550 Global_Append(MAKEFLAGS, "-q"); 551 break; 552 case 'r': 553 opts.noBuiltins = TRUE; 554 Global_Append(MAKEFLAGS, "-r"); 555 break; 556 case 's': 557 opts.beSilent = TRUE; 558 Global_Append(MAKEFLAGS, "-s"); 559 break; 560 case 't': 561 opts.touchFlag = TRUE; 562 Global_Append(MAKEFLAGS, "-t"); 563 break; 564 case 'w': 565 opts.enterFlag = TRUE; 566 Global_Append(MAKEFLAGS, "-w"); 567 break; 568 default: 569 case '?': 570 usage(); 571 } 572 return TRUE; 573 } 574 575 /* 576 * Parse the given arguments. Called from main() and from 577 * Main_ParseArgLine() when the .MAKEFLAGS target is used. 578 * 579 * The arguments must be treated as read-only and will be freed after the 580 * call. 581 * 582 * XXX: Deal with command line overriding .MAKEFLAGS in makefile 583 */ 584 static void 585 MainParseArgs(int argc, char **argv) 586 { 587 char c; 588 int arginc; 589 char *argvalue; 590 char *optscan; 591 Boolean inOption, dashDash = FALSE; 592 593 const char *optspecs = "BC:D:I:J:NST:V:WXd:ef:ij:km:nqrstv:w"; 594 /* Can't actually use getopt(3) because rescanning is not portable */ 595 596 rearg: 597 inOption = FALSE; 598 optscan = NULL; 599 while (argc > 1) { 600 const char *optspec; 601 if (!inOption) 602 optscan = argv[1]; 603 c = *optscan++; 604 arginc = 0; 605 if (inOption) { 606 if (c == '\0') { 607 argv++; 608 argc--; 609 inOption = FALSE; 610 continue; 611 } 612 } else { 613 if (c != '-' || dashDash) 614 break; 615 inOption = TRUE; 616 c = *optscan++; 617 } 618 /* '-' found at some earlier point */ 619 optspec = strchr(optspecs, c); 620 if (c != '\0' && optspec != NULL && optspec[1] == ':') { 621 /* -<something> found, and <something> should have an arg */ 622 inOption = FALSE; 623 arginc = 1; 624 argvalue = optscan; 625 if (*argvalue == '\0') { 626 if (argc < 3) 627 goto noarg; 628 argvalue = argv[2]; 629 arginc = 2; 630 } 631 } else { 632 argvalue = NULL; 633 } 634 switch (c) { 635 case '\0': 636 arginc = 1; 637 inOption = FALSE; 638 break; 639 case '-': 640 dashDash = TRUE; 641 break; 642 default: 643 if (!MainParseArg(c, argvalue)) 644 goto noarg; 645 } 646 argv += arginc; 647 argc -= arginc; 648 } 649 650 /* 651 * See if the rest of the arguments are variable assignments and 652 * perform them if so. Else take them to be targets and stuff them 653 * on the end of the "create" list. 654 */ 655 for (; argc > 1; argv++, argc--) { 656 VarAssign var; 657 if (Parse_IsVar(argv[1], &var)) { 658 Parse_DoVar(&var, SCOPE_CMDLINE); 659 } else { 660 if (argv[1][0] == '\0') 661 Punt("illegal (null) argument."); 662 if (argv[1][0] == '-' && !dashDash) 663 goto rearg; 664 Lst_Append(&opts.create, bmake_strdup(argv[1])); 665 } 666 } 667 668 return; 669 noarg: 670 (void)fprintf(stderr, "%s: option requires an argument -- %c\n", 671 progname, c); 672 usage(); 673 } 674 675 /* 676 * Break a line of arguments into words and parse them. 677 * 678 * Used when a .MFLAGS or .MAKEFLAGS target is encountered during parsing and 679 * by main() when reading the MAKEFLAGS environment variable. 680 */ 681 void 682 Main_ParseArgLine(const char *line) 683 { 684 Words words; 685 char *buf; 686 687 if (line == NULL) 688 return; 689 /* XXX: don't use line as an iterator variable */ 690 for (; *line == ' '; line++) 691 continue; 692 if (line[0] == '\0') 693 return; 694 695 { 696 FStr argv0 = Var_Value(".MAKE", SCOPE_GLOBAL); 697 buf = str_concat3(argv0.str, " ", line); 698 FStr_Done(&argv0); 699 } 700 701 words = Str_Words(buf, TRUE); 702 if (words.words == NULL) { 703 Error("Unterminated quoted string [%s]", buf); 704 free(buf); 705 return; 706 } 707 free(buf); 708 MainParseArgs((int)words.len, words.words); 709 710 Words_Free(words); 711 } 712 713 Boolean 714 Main_SetObjdir(Boolean writable, const char *fmt, ...) 715 { 716 struct stat sb; 717 char *path; 718 char buf[MAXPATHLEN + 1]; 719 char buf2[MAXPATHLEN + 1]; 720 Boolean rc = FALSE; 721 va_list ap; 722 723 va_start(ap, fmt); 724 vsnprintf(path = buf, MAXPATHLEN, fmt, ap); 725 va_end(ap); 726 727 if (path[0] != '/') { 728 snprintf(buf2, MAXPATHLEN, "%s/%s", curdir, path); 729 path = buf2; 730 } 731 732 /* look for the directory and try to chdir there */ 733 if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) { 734 if ((writable && access(path, W_OK) != 0) || 735 (chdir(path) != 0)) { 736 (void)fprintf(stderr, "%s warning: %s: %s.\n", 737 progname, path, strerror(errno)); 738 } else { 739 snprintf(objdir, sizeof objdir, "%s", path); 740 Global_Set(".OBJDIR", objdir); 741 setenv("PWD", objdir, 1); 742 Dir_InitDot(); 743 purge_relative_cached_realpaths(); 744 rc = TRUE; 745 if (opts.enterFlag && strcmp(objdir, curdir) != 0) 746 enterFlagObj = TRUE; 747 } 748 } 749 750 return rc; 751 } 752 753 static Boolean 754 SetVarObjdir(Boolean writable, const char *var, const char *suffix) 755 { 756 FStr path = Var_Value(var, SCOPE_CMDLINE); 757 FStr xpath; 758 759 if (path.str == NULL || path.str[0] == '\0') { 760 FStr_Done(&path); 761 return FALSE; 762 } 763 764 /* expand variable substitutions */ 765 xpath = FStr_InitRefer(path.str); 766 if (strchr(path.str, '$') != 0) { 767 char *expanded; 768 (void)Var_Subst(path.str, SCOPE_GLOBAL, VARE_WANTRES, &expanded); 769 /* TODO: handle errors */ 770 xpath = FStr_InitOwn(expanded); 771 } 772 773 (void)Main_SetObjdir(writable, "%s%s", xpath.str, suffix); 774 775 FStr_Done(&xpath); 776 FStr_Done(&path); 777 return TRUE; 778 } 779 780 /* 781 * Splits str into words, adding them to the list. 782 * The string must be kept alive as long as the list. 783 */ 784 int 785 str2Lst_Append(StringList *lp, char *str) 786 { 787 char *cp; 788 int n; 789 790 const char *sep = " \t"; 791 792 for (n = 0, cp = strtok(str, sep); cp != NULL; cp = strtok(NULL, sep)) { 793 Lst_Append(lp, cp); 794 n++; 795 } 796 return n; 797 } 798 799 #ifdef SIGINFO 800 /*ARGSUSED*/ 801 static void 802 siginfo(int signo MAKE_ATTR_UNUSED) 803 { 804 char dir[MAXPATHLEN]; 805 char str[2 * MAXPATHLEN]; 806 int len; 807 if (getcwd(dir, sizeof dir) == NULL) 808 return; 809 len = snprintf(str, sizeof str, "%s: Working in: %s\n", progname, dir); 810 if (len > 0) 811 (void)write(STDERR_FILENO, str, (size_t)len); 812 } 813 #endif 814 815 /* Allow makefiles some control over the mode we run in. */ 816 static void 817 MakeMode(void) 818 { 819 char *mode; 820 821 (void)Var_Subst("${" MAKE_MODE ":tl}", SCOPE_GLOBAL, VARE_WANTRES, &mode); 822 /* TODO: handle errors */ 823 824 if (mode[0] != '\0') { 825 if (strstr(mode, "compat") != NULL) { 826 opts.compatMake = TRUE; 827 forceJobs = FALSE; 828 } 829 #if USE_META 830 if (strstr(mode, "meta") != NULL) 831 meta_mode_init(mode); 832 #endif 833 } 834 835 free(mode); 836 } 837 838 static void 839 PrintVar(const char *varname, Boolean expandVars) 840 { 841 if (strchr(varname, '$') != NULL) { 842 char *evalue; 843 (void)Var_Subst(varname, SCOPE_GLOBAL, VARE_WANTRES, &evalue); 844 /* TODO: handle errors */ 845 printf("%s\n", evalue); 846 bmake_free(evalue); 847 848 } else if (expandVars) { 849 char *expr = str_concat3("${", varname, "}"); 850 char *evalue; 851 (void)Var_Subst(expr, SCOPE_GLOBAL, VARE_WANTRES, &evalue); 852 /* TODO: handle errors */ 853 free(expr); 854 printf("%s\n", evalue); 855 bmake_free(evalue); 856 857 } else { 858 FStr value = Var_Value(varname, SCOPE_GLOBAL); 859 printf("%s\n", value.str != NULL ? value.str : ""); 860 FStr_Done(&value); 861 } 862 } 863 864 /* 865 * Return a Boolean based on a variable. 866 * 867 * If the knob is not set, return the fallback. 868 * If set, anything that looks or smells like "No", "False", "Off", "0", etc. 869 * is FALSE, otherwise TRUE. 870 */ 871 static Boolean 872 GetBooleanVar(const char *varname, Boolean fallback) 873 { 874 char *expr = str_concat3("${", varname, ":U}"); 875 char *value; 876 Boolean res; 877 878 (void)Var_Subst(expr, SCOPE_GLOBAL, VARE_WANTRES, &value); 879 /* TODO: handle errors */ 880 res = ParseBoolean(value, fallback); 881 free(value); 882 free(expr); 883 return res; 884 } 885 886 static void 887 doPrintVars(void) 888 { 889 StringListNode *ln; 890 Boolean expandVars; 891 892 if (opts.printVars == PVM_EXPANDED) 893 expandVars = TRUE; 894 else if (opts.debugVflag) 895 expandVars = FALSE; 896 else 897 expandVars = GetBooleanVar(".MAKE.EXPAND_VARIABLES", FALSE); 898 899 for (ln = opts.variables.first; ln != NULL; ln = ln->next) { 900 const char *varname = ln->datum; 901 PrintVar(varname, expandVars); 902 } 903 } 904 905 static Boolean 906 runTargets(void) 907 { 908 GNodeList targs = LST_INIT; /* target nodes to create */ 909 Boolean outOfDate; /* FALSE if all targets up to date */ 910 911 /* 912 * Have now read the entire graph and need to make a list of 913 * targets to create. If none was given on the command line, 914 * we consult the parsing module to find the main target(s) 915 * to create. 916 */ 917 if (Lst_IsEmpty(&opts.create)) 918 Parse_MainName(&targs); 919 else 920 Targ_FindList(&targs, &opts.create); 921 922 if (!opts.compatMake) { 923 /* 924 * Initialize job module before traversing the graph 925 * now that any .BEGIN and .END targets have been read. 926 * This is done only if the -q flag wasn't given 927 * (to prevent the .BEGIN from being executed should 928 * it exist). 929 */ 930 if (!opts.queryFlag) { 931 Job_Init(); 932 jobsRunning = TRUE; 933 } 934 935 /* Traverse the graph, checking on all the targets */ 936 outOfDate = Make_Run(&targs); 937 } else { 938 /* 939 * Compat_Init will take care of creating all the 940 * targets as well as initializing the module. 941 */ 942 Compat_Run(&targs); 943 outOfDate = FALSE; 944 } 945 Lst_Done(&targs); /* Don't free the targets themselves. */ 946 return outOfDate; 947 } 948 949 /* 950 * Set up the .TARGETS variable to contain the list of targets to be 951 * created. If none specified, make the variable empty -- the parser 952 * will fill the thing in with the default or .MAIN target. 953 */ 954 static void 955 InitVarTargets(void) 956 { 957 StringListNode *ln; 958 959 if (Lst_IsEmpty(&opts.create)) { 960 Global_Set(".TARGETS", ""); 961 return; 962 } 963 964 for (ln = opts.create.first; ln != NULL; ln = ln->next) { 965 const char *name = ln->datum; 966 Global_Append(".TARGETS", name); 967 } 968 } 969 970 static void 971 InitRandom(void) 972 { 973 struct timeval tv; 974 975 gettimeofday(&tv, NULL); 976 srandom((unsigned int)(tv.tv_sec + tv.tv_usec)); 977 } 978 979 static const char * 980 InitVarMachine(const struct utsname *utsname MAKE_ATTR_UNUSED) 981 { 982 const char *machine = getenv("MACHINE"); 983 if (machine != NULL) 984 return machine; 985 986 #if defined(MAKE_NATIVE) 987 return utsname->machine; 988 #elif defined(MAKE_MACHINE) 989 return MAKE_MACHINE; 990 #else 991 return "unknown"; 992 #endif 993 } 994 995 static const char * 996 InitVarMachineArch(void) 997 { 998 const char *env = getenv("MACHINE_ARCH"); 999 if (env != NULL) 1000 return env; 1001 1002 #ifdef MAKE_NATIVE 1003 { 1004 struct utsname utsname; 1005 static char machine_arch_buf[sizeof utsname.machine]; 1006 const int mib[2] = { CTL_HW, HW_MACHINE_ARCH }; 1007 size_t len = sizeof machine_arch_buf; 1008 1009 if (sysctl(mib, (unsigned int)__arraycount(mib), 1010 machine_arch_buf, &len, NULL, 0) < 0) { 1011 (void)fprintf(stderr, "%s: sysctl failed (%s).\n", 1012 progname, strerror(errno)); 1013 exit(2); 1014 } 1015 1016 return machine_arch_buf; 1017 } 1018 #elif defined(MACHINE_ARCH) 1019 return MACHINE_ARCH; 1020 #elif defined(MAKE_MACHINE_ARCH) 1021 return MAKE_MACHINE_ARCH; 1022 #else 1023 return "unknown"; 1024 #endif 1025 } 1026 1027 #ifndef NO_PWD_OVERRIDE 1028 /* 1029 * All this code is so that we know where we are when we start up 1030 * on a different machine with pmake. 1031 * 1032 * XXX: Make no longer has "local" and "remote" mode. Is this code still 1033 * necessary? 1034 * 1035 * Overriding getcwd() with $PWD totally breaks MAKEOBJDIRPREFIX 1036 * since the value of curdir can vary depending on how we got 1037 * here. Ie sitting at a shell prompt (shell that provides $PWD) 1038 * or via subdir.mk in which case its likely a shell which does 1039 * not provide it. 1040 * 1041 * So, to stop it breaking this case only, we ignore PWD if 1042 * MAKEOBJDIRPREFIX is set or MAKEOBJDIR contains a variable expression. 1043 */ 1044 static void 1045 HandlePWD(const struct stat *curdir_st) 1046 { 1047 char *pwd; 1048 FStr prefix, makeobjdir; 1049 struct stat pwd_st; 1050 1051 if (ignorePWD || (pwd = getenv("PWD")) == NULL) 1052 return; 1053 1054 prefix = Var_Value("MAKEOBJDIRPREFIX", SCOPE_CMDLINE); 1055 if (prefix.str != NULL) { 1056 FStr_Done(&prefix); 1057 return; 1058 } 1059 1060 makeobjdir = Var_Value("MAKEOBJDIR", SCOPE_CMDLINE); 1061 if (makeobjdir.str != NULL && strchr(makeobjdir.str, '$') != NULL) 1062 goto ignore_pwd; 1063 1064 if (stat(pwd, &pwd_st) == 0 && 1065 curdir_st->st_ino == pwd_st.st_ino && 1066 curdir_st->st_dev == pwd_st.st_dev) 1067 (void)strncpy(curdir, pwd, MAXPATHLEN); 1068 1069 ignore_pwd: 1070 FStr_Done(&makeobjdir); 1071 } 1072 #endif 1073 1074 /* 1075 * Find the .OBJDIR. If MAKEOBJDIRPREFIX, or failing that, 1076 * MAKEOBJDIR is set in the environment, try only that value 1077 * and fall back to .CURDIR if it does not exist. 1078 * 1079 * Otherwise, try _PATH_OBJDIR.MACHINE-MACHINE_ARCH, _PATH_OBJDIR.MACHINE, 1080 * and * finally _PATH_OBJDIRPREFIX`pwd`, in that order. If none 1081 * of these paths exist, just use .CURDIR. 1082 */ 1083 static void 1084 InitObjdir(const char *machine, const char *machine_arch) 1085 { 1086 Boolean writable; 1087 1088 Dir_InitCur(curdir); 1089 writable = GetBooleanVar("MAKE_OBJDIR_CHECK_WRITABLE", TRUE); 1090 (void)Main_SetObjdir(FALSE, "%s", curdir); 1091 1092 if (!SetVarObjdir(writable, "MAKEOBJDIRPREFIX", curdir) && 1093 !SetVarObjdir(writable, "MAKEOBJDIR", "") && 1094 !Main_SetObjdir(writable, "%s.%s-%s", _PATH_OBJDIR, machine, machine_arch) && 1095 !Main_SetObjdir(writable, "%s.%s", _PATH_OBJDIR, machine) && 1096 !Main_SetObjdir(writable, "%s", _PATH_OBJDIR)) 1097 (void)Main_SetObjdir(writable, "%s%s", _PATH_OBJDIRPREFIX, curdir); 1098 } 1099 1100 /* get rid of resource limit on file descriptors */ 1101 static void 1102 UnlimitFiles(void) 1103 { 1104 #if defined(MAKE_NATIVE) || (defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE)) 1105 struct rlimit rl; 1106 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 && 1107 rl.rlim_cur != rl.rlim_max) { 1108 rl.rlim_cur = rl.rlim_max; 1109 (void)setrlimit(RLIMIT_NOFILE, &rl); 1110 } 1111 #endif 1112 } 1113 1114 static void 1115 CmdOpts_Init(void) 1116 { 1117 opts.compatMake = FALSE; 1118 opts.debug = DEBUG_NONE; 1119 /* opts.debug_file has already been initialized earlier */ 1120 opts.strict = FALSE; 1121 opts.debugVflag = FALSE; 1122 opts.checkEnvFirst = FALSE; 1123 Lst_Init(&opts.makefiles); 1124 opts.ignoreErrors = FALSE; /* Pay attention to non-zero returns */ 1125 opts.maxJobs = 1; 1126 opts.keepgoing = FALSE; /* Stop on error */ 1127 opts.noRecursiveExecute = FALSE; /* Execute all .MAKE targets */ 1128 opts.noExecute = FALSE; /* Execute all commands */ 1129 opts.queryFlag = FALSE; 1130 opts.noBuiltins = FALSE; /* Read the built-in rules */ 1131 opts.beSilent = FALSE; /* Print commands as executed */ 1132 opts.touchFlag = FALSE; 1133 opts.printVars = PVM_NONE; 1134 Lst_Init(&opts.variables); 1135 opts.parseWarnFatal = FALSE; 1136 opts.enterFlag = FALSE; 1137 opts.varNoExportEnv = FALSE; 1138 Lst_Init(&opts.create); 1139 } 1140 1141 /* 1142 * Initialize MAKE and .MAKE to the path of the executable, so that it can be 1143 * found by execvp(3) and the shells, even after a chdir. 1144 * 1145 * If it's a relative path and contains a '/', resolve it to an absolute path. 1146 * Otherwise keep it as is, assuming it will be found in the PATH. 1147 */ 1148 static void 1149 InitVarMake(const char *argv0) 1150 { 1151 const char *make = argv0; 1152 1153 if (argv0[0] != '/' && strchr(argv0, '/') != NULL) { 1154 char pathbuf[MAXPATHLEN]; 1155 const char *abspath = cached_realpath(argv0, pathbuf); 1156 struct stat st; 1157 if (abspath != NULL && abspath[0] == '/' && 1158 stat(make, &st) == 0) 1159 make = abspath; 1160 } 1161 1162 Global_Set("MAKE", make); 1163 Global_Set(".MAKE", make); 1164 } 1165 1166 /* 1167 * Add the directories from the colon-separated syspath to defSysIncPath. 1168 * After returning, the contents of syspath is unspecified. 1169 */ 1170 static void 1171 InitDefSysIncPath(char *syspath) 1172 { 1173 static char defsyspath[] = _PATH_DEFSYSPATH; 1174 char *start, *cp; 1175 1176 /* 1177 * If no user-supplied system path was given (through the -m option) 1178 * add the directories from the DEFSYSPATH (more than one may be given 1179 * as dir1:...:dirn) to the system include path. 1180 */ 1181 if (syspath == NULL || syspath[0] == '\0') 1182 syspath = defsyspath; 1183 else 1184 syspath = bmake_strdup(syspath); 1185 1186 for (start = syspath; *start != '\0'; start = cp) { 1187 for (cp = start; *cp != '\0' && *cp != ':'; cp++) 1188 continue; 1189 if (*cp == ':') 1190 *cp++ = '\0'; 1191 1192 /* look for magic parent directory search string */ 1193 if (strncmp(start, ".../", 4) == 0) { 1194 char *dir = Dir_FindHereOrAbove(curdir, start + 4); 1195 if (dir != NULL) { 1196 (void)SearchPath_Add(defSysIncPath, dir); 1197 free(dir); 1198 } 1199 } else { 1200 (void)SearchPath_Add(defSysIncPath, start); 1201 } 1202 } 1203 1204 if (syspath != defsyspath) 1205 free(syspath); 1206 } 1207 1208 static void 1209 ReadBuiltinRules(void) 1210 { 1211 StringListNode *ln; 1212 StringList sysMkFiles = LST_INIT; 1213 1214 SearchPath_Expand( 1215 Lst_IsEmpty(&sysIncPath->dirs) ? defSysIncPath : sysIncPath, 1216 _PATH_DEFSYSMK, 1217 &sysMkFiles); 1218 if (Lst_IsEmpty(&sysMkFiles)) 1219 Fatal("%s: no system rules (%s).", progname, _PATH_DEFSYSMK); 1220 1221 for (ln = sysMkFiles.first; ln != NULL; ln = ln->next) 1222 if (ReadMakefile(ln->datum) == 0) 1223 break; 1224 1225 if (ln == NULL) 1226 Fatal("%s: cannot open %s.", 1227 progname, (const char *)sysMkFiles.first->datum); 1228 1229 /* Free the list nodes but not the actual filenames since these may 1230 * still be used in GNodes. */ 1231 Lst_Done(&sysMkFiles); 1232 } 1233 1234 static void 1235 InitMaxJobs(void) 1236 { 1237 char *value; 1238 int n; 1239 1240 if (forceJobs || opts.compatMake || 1241 !Var_Exists(".MAKE.JOBS", SCOPE_GLOBAL)) 1242 return; 1243 1244 (void)Var_Subst("${.MAKE.JOBS}", SCOPE_GLOBAL, VARE_WANTRES, &value); 1245 /* TODO: handle errors */ 1246 n = (int)strtol(value, NULL, 0); 1247 if (n < 1) { 1248 (void)fprintf(stderr, 1249 "%s: illegal value for .MAKE.JOBS " 1250 "-- must be positive integer!\n", 1251 progname); 1252 exit(2); /* Not 1 so -q can distinguish error */ 1253 } 1254 1255 if (n != opts.maxJobs) { 1256 Global_Append(MAKEFLAGS, "-j"); 1257 Global_Append(MAKEFLAGS, value); 1258 } 1259 1260 opts.maxJobs = n; 1261 maxJobTokens = opts.maxJobs; 1262 forceJobs = TRUE; 1263 free(value); 1264 } 1265 1266 /* 1267 * For compatibility, look at the directories in the VPATH variable 1268 * and add them to the search path, if the variable is defined. The 1269 * variable's value is in the same format as the PATH environment 1270 * variable, i.e. <directory>:<directory>:<directory>... 1271 */ 1272 static void 1273 InitVpath(void) 1274 { 1275 char *vpath, savec, *path; 1276 if (!Var_Exists("VPATH", SCOPE_CMDLINE)) 1277 return; 1278 1279 (void)Var_Subst("${VPATH}", SCOPE_CMDLINE, VARE_WANTRES, &vpath); 1280 /* TODO: handle errors */ 1281 path = vpath; 1282 do { 1283 char *cp; 1284 /* skip to end of directory */ 1285 for (cp = path; *cp != ':' && *cp != '\0'; cp++) 1286 continue; 1287 /* Save terminator character so know when to stop */ 1288 savec = *cp; 1289 *cp = '\0'; 1290 /* Add directory to search path */ 1291 (void)SearchPath_Add(&dirSearchPath, path); 1292 *cp = savec; 1293 path = cp + 1; 1294 } while (savec == ':'); 1295 free(vpath); 1296 } 1297 1298 static void 1299 ReadAllMakefiles(StringList *makefiles) 1300 { 1301 StringListNode *ln; 1302 1303 for (ln = makefiles->first; ln != NULL; ln = ln->next) { 1304 const char *fname = ln->datum; 1305 if (ReadMakefile(fname) != 0) 1306 Fatal("%s: cannot open %s.", progname, fname); 1307 } 1308 } 1309 1310 static void 1311 ReadFirstDefaultMakefile(void) 1312 { 1313 StringListNode *ln; 1314 char *prefs; 1315 1316 (void)Var_Subst("${" MAKE_MAKEFILE_PREFERENCE "}", 1317 SCOPE_CMDLINE, VARE_WANTRES, &prefs); 1318 /* TODO: handle errors */ 1319 1320 /* XXX: This should use a local list instead of opts.makefiles 1321 * since these makefiles do not come from the command line. They 1322 * also have different semantics in that only the first file that 1323 * is found is processed. See ReadAllMakefiles. */ 1324 (void)str2Lst_Append(&opts.makefiles, prefs); 1325 1326 for (ln = opts.makefiles.first; ln != NULL; ln = ln->next) 1327 if (ReadMakefile(ln->datum) == 0) 1328 break; 1329 1330 free(prefs); 1331 } 1332 1333 /* 1334 * Initialize variables such as MAKE, MACHINE, .MAKEFLAGS. 1335 * Initialize a few modules. 1336 * Parse the arguments from MAKEFLAGS and the command line. 1337 */ 1338 static void 1339 main_Init(int argc, char **argv) 1340 { 1341 struct stat sa; 1342 const char *machine; 1343 const char *machine_arch; 1344 char *syspath = getenv("MAKESYSPATH"); 1345 struct utsname utsname; 1346 1347 /* default to writing debug to stderr */ 1348 opts.debug_file = stderr; 1349 1350 HashTable_Init(&cached_realpaths); 1351 1352 #ifdef SIGINFO 1353 (void)bmake_signal(SIGINFO, siginfo); 1354 #endif 1355 1356 InitRandom(); 1357 1358 progname = str_basename(argv[0]); 1359 1360 UnlimitFiles(); 1361 1362 if (uname(&utsname) == -1) { 1363 (void)fprintf(stderr, "%s: uname failed (%s).\n", progname, 1364 strerror(errno)); 1365 exit(2); 1366 } 1367 1368 /* 1369 * Get the name of this type of MACHINE from utsname 1370 * so we can share an executable for similar machines. 1371 * (i.e. m68k: amiga hp300, mac68k, sun3, ...) 1372 * 1373 * Note that both MACHINE and MACHINE_ARCH are decided at 1374 * run-time. 1375 */ 1376 machine = InitVarMachine(&utsname); 1377 machine_arch = InitVarMachineArch(); 1378 1379 myPid = getpid(); /* remember this for vFork() */ 1380 1381 /* 1382 * Just in case MAKEOBJDIR wants us to do something tricky. 1383 */ 1384 Targ_Init(); 1385 Var_Init(); 1386 Global_Set(".MAKE.OS", utsname.sysname); 1387 Global_Set("MACHINE", machine); 1388 Global_Set("MACHINE_ARCH", machine_arch); 1389 #ifdef MAKE_VERSION 1390 Global_Set("MAKE_VERSION", MAKE_VERSION); 1391 #endif 1392 Global_Set(".newline", "\n"); /* handy for :@ loops */ 1393 /* 1394 * This is the traditional preference for makefiles. 1395 */ 1396 #ifndef MAKEFILE_PREFERENCE_LIST 1397 # define MAKEFILE_PREFERENCE_LIST "makefile Makefile" 1398 #endif 1399 Global_Set(MAKE_MAKEFILE_PREFERENCE, MAKEFILE_PREFERENCE_LIST); 1400 Global_Set(MAKE_DEPENDFILE, ".depend"); 1401 1402 CmdOpts_Init(); 1403 allPrecious = FALSE; /* Remove targets when interrupted */ 1404 deleteOnError = FALSE; /* Historical default behavior */ 1405 jobsRunning = FALSE; 1406 1407 maxJobTokens = opts.maxJobs; 1408 ignorePWD = FALSE; 1409 1410 /* 1411 * Initialize the parsing, directory and variable modules to prepare 1412 * for the reading of inclusion paths and variable settings on the 1413 * command line 1414 */ 1415 1416 /* 1417 * Initialize various variables. 1418 * MAKE also gets this name, for compatibility 1419 * .MAKEFLAGS gets set to the empty string just in case. 1420 * MFLAGS also gets initialized empty, for compatibility. 1421 */ 1422 Parse_Init(); 1423 InitVarMake(argv[0]); 1424 Global_Set(MAKEFLAGS, ""); 1425 Global_Set(MAKEOVERRIDES, ""); 1426 Global_Set("MFLAGS", ""); 1427 Global_Set(".ALLTARGETS", ""); 1428 /* some makefiles need to know this */ 1429 Var_Set(MAKE_LEVEL ".ENV", MAKE_LEVEL_ENV, SCOPE_CMDLINE); 1430 1431 /* Set some other useful variables. */ 1432 { 1433 char tmp[64], *ep = getenv(MAKE_LEVEL_ENV); 1434 1435 makelevel = ep != NULL && ep[0] != '\0' ? atoi(ep) : 0; 1436 if (makelevel < 0) 1437 makelevel = 0; 1438 snprintf(tmp, sizeof tmp, "%d", makelevel); 1439 Global_Set(MAKE_LEVEL, tmp); 1440 snprintf(tmp, sizeof tmp, "%u", myPid); 1441 Global_Set(".MAKE.PID", tmp); 1442 snprintf(tmp, sizeof tmp, "%u", getppid()); 1443 Global_Set(".MAKE.PPID", tmp); 1444 snprintf(tmp, sizeof tmp, "%u", getuid()); 1445 Global_Set(".MAKE.UID", tmp); 1446 snprintf(tmp, sizeof tmp, "%u", getgid()); 1447 Global_Set(".MAKE.GID", tmp); 1448 } 1449 if (makelevel > 0) { 1450 char pn[1024]; 1451 snprintf(pn, sizeof pn, "%s[%d]", progname, makelevel); 1452 progname = bmake_strdup(pn); 1453 } 1454 1455 #ifdef USE_META 1456 meta_init(); 1457 #endif 1458 Dir_Init(); 1459 1460 /* 1461 * First snag any flags out of the MAKE environment variable. 1462 * (Note this is *not* MAKEFLAGS since /bin/make uses that and it's 1463 * in a different format). 1464 */ 1465 #ifdef POSIX 1466 { 1467 char *p1 = explode(getenv("MAKEFLAGS")); 1468 Main_ParseArgLine(p1); 1469 free(p1); 1470 } 1471 #else 1472 Main_ParseArgLine(getenv("MAKE")); 1473 #endif 1474 1475 /* 1476 * Find where we are (now). 1477 * We take care of PWD for the automounter below... 1478 */ 1479 if (getcwd(curdir, MAXPATHLEN) == NULL) { 1480 (void)fprintf(stderr, "%s: getcwd: %s.\n", 1481 progname, strerror(errno)); 1482 exit(2); 1483 } 1484 1485 MainParseArgs(argc, argv); 1486 1487 if (opts.enterFlag) 1488 printf("%s: Entering directory `%s'\n", progname, curdir); 1489 1490 /* 1491 * Verify that cwd is sane. 1492 */ 1493 if (stat(curdir, &sa) == -1) { 1494 (void)fprintf(stderr, "%s: %s: %s.\n", 1495 progname, curdir, strerror(errno)); 1496 exit(2); 1497 } 1498 1499 #ifndef NO_PWD_OVERRIDE 1500 HandlePWD(&sa); 1501 #endif 1502 Global_Set(".CURDIR", curdir); 1503 1504 InitObjdir(machine, machine_arch); 1505 1506 /* 1507 * Initialize archive, target and suffix modules in preparation for 1508 * parsing the makefile(s) 1509 */ 1510 Arch_Init(); 1511 Suff_Init(); 1512 Trace_Init(tracefile); 1513 1514 defaultNode = NULL; 1515 (void)time(&now); 1516 1517 Trace_Log(MAKESTART, NULL); 1518 1519 InitVarTargets(); 1520 1521 InitDefSysIncPath(syspath); 1522 } 1523 1524 /* 1525 * Read the system makefile followed by either makefile, Makefile or the 1526 * files given by the -f option. Exit on parse errors. 1527 */ 1528 static void 1529 main_ReadFiles(void) 1530 { 1531 1532 if (!opts.noBuiltins) 1533 ReadBuiltinRules(); 1534 1535 if (!Lst_IsEmpty(&opts.makefiles)) 1536 ReadAllMakefiles(&opts.makefiles); 1537 else 1538 ReadFirstDefaultMakefile(); 1539 } 1540 1541 /* Compute the dependency graph. */ 1542 static void 1543 main_PrepareMaking(void) 1544 { 1545 /* In particular suppress .depend for '-r -V .OBJDIR -f /dev/null' */ 1546 if (!opts.noBuiltins || opts.printVars == PVM_NONE) { 1547 (void)Var_Subst("${.MAKE.DEPENDFILE}", 1548 SCOPE_CMDLINE, VARE_WANTRES, &makeDependfile); 1549 if (makeDependfile[0] != '\0') { 1550 /* TODO: handle errors */ 1551 doing_depend = TRUE; 1552 (void)ReadMakefile(makeDependfile); 1553 doing_depend = FALSE; 1554 } 1555 } 1556 1557 if (enterFlagObj) 1558 printf("%s: Entering directory `%s'\n", progname, objdir); 1559 1560 MakeMode(); 1561 1562 { 1563 FStr makeflags = Var_Value(MAKEFLAGS, SCOPE_GLOBAL); 1564 Global_Append("MFLAGS", makeflags.str); 1565 FStr_Done(&makeflags); 1566 } 1567 1568 InitMaxJobs(); 1569 1570 /* 1571 * Be compatible if the user did not specify -j and did not explicitly 1572 * turn compatibility on. 1573 */ 1574 if (!opts.compatMake && !forceJobs) 1575 opts.compatMake = TRUE; 1576 1577 if (!opts.compatMake) 1578 Job_ServerStart(maxJobTokens, jp_0, jp_1); 1579 DEBUG5(JOB, "job_pipe %d %d, maxjobs %d, tokens %d, compat %d\n", 1580 jp_0, jp_1, opts.maxJobs, maxJobTokens, opts.compatMake ? 1 : 0); 1581 1582 if (opts.printVars == PVM_NONE) 1583 Main_ExportMAKEFLAGS(TRUE); /* initial export */ 1584 1585 InitVpath(); 1586 1587 /* 1588 * Now that all search paths have been read for suffixes et al, it's 1589 * time to add the default search path to their lists... 1590 */ 1591 Suff_DoPaths(); 1592 1593 /* 1594 * Propagate attributes through :: dependency lists. 1595 */ 1596 Targ_Propagate(); 1597 1598 /* print the initial graph, if the user requested it */ 1599 if (DEBUG(GRAPH1)) 1600 Targ_PrintGraph(1); 1601 } 1602 1603 /* 1604 * Make the targets. 1605 * If the -v or -V options are given, print variables instead. 1606 * Return whether any of the targets is out-of-date. 1607 */ 1608 static Boolean 1609 main_Run(void) 1610 { 1611 if (opts.printVars != PVM_NONE) { 1612 /* print the values of any variables requested by the user */ 1613 doPrintVars(); 1614 return FALSE; 1615 } else { 1616 return runTargets(); 1617 } 1618 } 1619 1620 /* Clean up after making the targets. */ 1621 static void 1622 main_CleanUp(void) 1623 { 1624 #ifdef CLEANUP 1625 Lst_DoneCall(&opts.variables, free); 1626 /* 1627 * Don't free the actual strings from opts.makefiles, they may be 1628 * used in GNodes. 1629 */ 1630 Lst_Done(&opts.makefiles); 1631 Lst_DoneCall(&opts.create, free); 1632 #endif 1633 1634 /* print the graph now it's been processed if the user requested it */ 1635 if (DEBUG(GRAPH2)) 1636 Targ_PrintGraph(2); 1637 1638 Trace_Log(MAKEEND, NULL); 1639 1640 if (enterFlagObj) 1641 printf("%s: Leaving directory `%s'\n", progname, objdir); 1642 if (opts.enterFlag) 1643 printf("%s: Leaving directory `%s'\n", progname, curdir); 1644 1645 #ifdef USE_META 1646 meta_finish(); 1647 #endif 1648 Suff_End(); 1649 Targ_End(); 1650 Arch_End(); 1651 Var_End(); 1652 Parse_End(); 1653 Dir_End(); 1654 Job_End(); 1655 Trace_End(); 1656 } 1657 1658 /* Determine the exit code. */ 1659 static int 1660 main_Exit(Boolean outOfDate) 1661 { 1662 if (opts.strict && (main_errors > 0 || Parse_GetFatals() > 0)) 1663 return 2; /* Not 1 so -q can distinguish error */ 1664 return outOfDate ? 1 : 0; 1665 } 1666 1667 int 1668 main(int argc, char **argv) 1669 { 1670 Boolean outOfDate; 1671 1672 main_Init(argc, argv); 1673 main_ReadFiles(); 1674 main_PrepareMaking(); 1675 outOfDate = main_Run(); 1676 main_CleanUp(); 1677 return main_Exit(outOfDate); 1678 } 1679 1680 /* 1681 * Open and parse the given makefile, with all its side effects. 1682 * 1683 * Results: 1684 * 0 if ok. -1 if couldn't open file. 1685 */ 1686 static int 1687 ReadMakefile(const char *fname) 1688 { 1689 int fd; 1690 char *name, *path = NULL; 1691 1692 if (strcmp(fname, "-") == 0) { 1693 Parse_File(NULL /*stdin*/, -1); 1694 Var_Set("MAKEFILE", "", SCOPE_INTERNAL); 1695 } else { 1696 /* if we've chdir'd, rebuild the path name */ 1697 if (strcmp(curdir, objdir) != 0 && *fname != '/') { 1698 path = str_concat3(curdir, "/", fname); 1699 fd = open(path, O_RDONLY); 1700 if (fd != -1) { 1701 fname = path; 1702 goto found; 1703 } 1704 free(path); 1705 1706 /* If curdir failed, try objdir (ala .depend) */ 1707 path = str_concat3(objdir, "/", fname); 1708 fd = open(path, O_RDONLY); 1709 if (fd != -1) { 1710 fname = path; 1711 goto found; 1712 } 1713 } else { 1714 fd = open(fname, O_RDONLY); 1715 if (fd != -1) 1716 goto found; 1717 } 1718 /* look in -I and system include directories. */ 1719 name = Dir_FindFile(fname, parseIncPath); 1720 if (name == NULL) { 1721 SearchPath *sysInc = Lst_IsEmpty(&sysIncPath->dirs) 1722 ? defSysIncPath : sysIncPath; 1723 name = Dir_FindFile(fname, sysInc); 1724 } 1725 if (name == NULL || (fd = open(name, O_RDONLY)) == -1) { 1726 free(name); 1727 free(path); 1728 return -1; 1729 } 1730 fname = name; 1731 /* 1732 * set the MAKEFILE variable desired by System V fans -- the 1733 * placement of the setting here means it gets set to the last 1734 * makefile specified, as it is set by SysV make. 1735 */ 1736 found: 1737 if (!doing_depend) 1738 Var_Set("MAKEFILE", fname, SCOPE_INTERNAL); 1739 Parse_File(fname, fd); 1740 } 1741 free(path); 1742 return 0; 1743 } 1744 1745 /* 1746 * Cmd_Exec -- 1747 * Execute the command in cmd, and return the output of that command 1748 * in a string. In the output, newlines are replaced with spaces. 1749 * 1750 * Results: 1751 * A string containing the output of the command, or the empty string. 1752 * *errfmt returns a format string describing the command failure, 1753 * if any, using a single %s conversion specification. 1754 * 1755 * Side Effects: 1756 * The string must be freed by the caller. 1757 */ 1758 char * 1759 Cmd_Exec(const char *cmd, const char **errfmt) 1760 { 1761 const char *args[4]; /* Args for invoking the shell */ 1762 int pipefds[2]; 1763 int cpid; /* Child PID */ 1764 int pid; /* PID from wait() */ 1765 int status; /* command exit status */ 1766 Buffer buf; /* buffer to store the result */ 1767 ssize_t bytes_read; 1768 char *res; /* result */ 1769 size_t res_len; 1770 char *cp; 1771 int savederr; /* saved errno */ 1772 1773 *errfmt = NULL; 1774 1775 if (shellName == NULL) 1776 Shell_Init(); 1777 /* 1778 * Set up arguments for shell 1779 */ 1780 args[0] = shellName; 1781 args[1] = "-c"; 1782 args[2] = cmd; 1783 args[3] = NULL; 1784 1785 /* 1786 * Open a pipe for fetching its output 1787 */ 1788 if (pipe(pipefds) == -1) { 1789 *errfmt = "Couldn't create pipe for \"%s\""; 1790 goto bad; 1791 } 1792 1793 Var_ReexportVars(); 1794 1795 /* 1796 * Fork 1797 */ 1798 switch (cpid = vfork()) { 1799 case 0: 1800 (void)close(pipefds[0]); /* Close input side of pipe */ 1801 1802 /* 1803 * Duplicate the output stream to the shell's output, then 1804 * shut the extra thing down. Note we don't fetch the error 1805 * stream...why not? Why? 1806 */ 1807 (void)dup2(pipefds[1], 1); 1808 (void)close(pipefds[1]); 1809 1810 (void)execv(shellPath, UNCONST(args)); 1811 _exit(1); 1812 /*NOTREACHED*/ 1813 1814 case -1: 1815 *errfmt = "Couldn't exec \"%s\""; 1816 goto bad; 1817 1818 default: 1819 (void)close(pipefds[1]); /* No need for the writing half */ 1820 1821 savederr = 0; 1822 Buf_Init(&buf); 1823 1824 do { 1825 char result[BUFSIZ]; 1826 bytes_read = read(pipefds[0], result, sizeof result); 1827 if (bytes_read > 0) 1828 Buf_AddBytes(&buf, result, (size_t)bytes_read); 1829 } while (bytes_read > 0 || 1830 (bytes_read == -1 && errno == EINTR)); 1831 if (bytes_read == -1) 1832 savederr = errno; 1833 1834 (void)close(pipefds[0]); /* Close the input side of the pipe. */ 1835 1836 /* Wait for the process to exit. */ 1837 while ((pid = waitpid(cpid, &status, 0)) != cpid && pid >= 0) 1838 JobReapChild(pid, status, FALSE); 1839 1840 res_len = buf.len; 1841 res = Buf_DoneData(&buf); 1842 1843 if (savederr != 0) 1844 *errfmt = "Couldn't read shell's output for \"%s\""; 1845 1846 if (WIFSIGNALED(status)) 1847 *errfmt = "\"%s\" exited on a signal"; 1848 else if (WEXITSTATUS(status) != 0) 1849 *errfmt = "\"%s\" returned non-zero status"; 1850 1851 /* Convert newlines to spaces. A final newline is just stripped */ 1852 if (res_len > 0 && res[res_len - 1] == '\n') 1853 res[res_len - 1] = '\0'; 1854 for (cp = res; *cp != '\0'; cp++) 1855 if (*cp == '\n') 1856 *cp = ' '; 1857 break; 1858 } 1859 return res; 1860 bad: 1861 return bmake_strdup(""); 1862 } 1863 1864 /* 1865 * Print a printf-style error message. 1866 * 1867 * In default mode, this error message has no consequences, in particular it 1868 * does not affect the exit status. Only in lint mode (-dL) it does. 1869 */ 1870 void 1871 Error(const char *fmt, ...) 1872 { 1873 va_list ap; 1874 FILE *err_file; 1875 1876 err_file = opts.debug_file; 1877 if (err_file == stdout) 1878 err_file = stderr; 1879 (void)fflush(stdout); 1880 for (;;) { 1881 va_start(ap, fmt); 1882 fprintf(err_file, "%s: ", progname); 1883 (void)vfprintf(err_file, fmt, ap); 1884 va_end(ap); 1885 (void)fprintf(err_file, "\n"); 1886 (void)fflush(err_file); 1887 if (err_file == stderr) 1888 break; 1889 err_file = stderr; 1890 } 1891 main_errors++; 1892 } 1893 1894 /* 1895 * Wait for any running jobs to finish, then produce an error message, 1896 * finally exit immediately. 1897 * 1898 * Exiting immediately differs from Parse_Error, which exits only after the 1899 * current top-level makefile has been parsed completely. 1900 */ 1901 void 1902 Fatal(const char *fmt, ...) 1903 { 1904 va_list ap; 1905 1906 if (jobsRunning) 1907 Job_Wait(); 1908 1909 (void)fflush(stdout); 1910 va_start(ap, fmt); 1911 (void)vfprintf(stderr, fmt, ap); 1912 va_end(ap); 1913 (void)fprintf(stderr, "\n"); 1914 (void)fflush(stderr); 1915 1916 PrintOnError(NULL, NULL); 1917 1918 if (DEBUG(GRAPH2) || DEBUG(GRAPH3)) 1919 Targ_PrintGraph(2); 1920 Trace_Log(MAKEERROR, NULL); 1921 exit(2); /* Not 1 so -q can distinguish error */ 1922 } 1923 1924 /* 1925 * Major exception once jobs are being created. 1926 * Kills all jobs, prints a message and exits. 1927 */ 1928 void 1929 Punt(const char *fmt, ...) 1930 { 1931 va_list ap; 1932 1933 va_start(ap, fmt); 1934 (void)fflush(stdout); 1935 (void)fprintf(stderr, "%s: ", progname); 1936 (void)vfprintf(stderr, fmt, ap); 1937 va_end(ap); 1938 (void)fprintf(stderr, "\n"); 1939 (void)fflush(stderr); 1940 1941 PrintOnError(NULL, NULL); 1942 1943 DieHorribly(); 1944 } 1945 1946 /* Exit without giving a message. */ 1947 void 1948 DieHorribly(void) 1949 { 1950 if (jobsRunning) 1951 Job_AbortAll(); 1952 if (DEBUG(GRAPH2)) 1953 Targ_PrintGraph(2); 1954 Trace_Log(MAKEERROR, NULL); 1955 exit(2); /* Not 1 so -q can distinguish error */ 1956 } 1957 1958 /* 1959 * Called when aborting due to errors in child shell to signal abnormal exit. 1960 * The program exits. 1961 * Errors is the number of errors encountered in Make_Make. 1962 */ 1963 void 1964 Finish(int errs) 1965 { 1966 if (shouldDieQuietly(NULL, -1)) 1967 exit(2); 1968 Fatal("%d error%s", errs, errs == 1 ? "" : "s"); 1969 } 1970 1971 /* 1972 * eunlink -- 1973 * Remove a file carefully, avoiding directories. 1974 */ 1975 int 1976 eunlink(const char *file) 1977 { 1978 struct stat st; 1979 1980 if (lstat(file, &st) == -1) 1981 return -1; 1982 1983 if (S_ISDIR(st.st_mode)) { 1984 errno = EISDIR; 1985 return -1; 1986 } 1987 return unlink(file); 1988 } 1989 1990 static void 1991 write_all(int fd, const void *data, size_t n) 1992 { 1993 const char *mem = data; 1994 1995 while (n > 0) { 1996 ssize_t written = write(fd, mem, n); 1997 if (written == -1 && errno == EAGAIN) 1998 continue; 1999 if (written == -1) 2000 break; 2001 mem += written; 2002 n -= (size_t)written; 2003 } 2004 } 2005 2006 /* 2007 * execDie -- 2008 * Print why exec failed, avoiding stdio. 2009 */ 2010 void MAKE_ATTR_DEAD 2011 execDie(const char *af, const char *av) 2012 { 2013 Buffer buf; 2014 2015 Buf_Init(&buf); 2016 Buf_AddStr(&buf, progname); 2017 Buf_AddStr(&buf, ": "); 2018 Buf_AddStr(&buf, af); 2019 Buf_AddStr(&buf, "("); 2020 Buf_AddStr(&buf, av); 2021 Buf_AddStr(&buf, ") failed ("); 2022 Buf_AddStr(&buf, strerror(errno)); 2023 Buf_AddStr(&buf, ")\n"); 2024 2025 write_all(STDERR_FILENO, buf.data, buf.len); 2026 2027 Buf_Done(&buf); 2028 _exit(1); 2029 } 2030 2031 /* purge any relative paths */ 2032 static void 2033 purge_relative_cached_realpaths(void) 2034 { 2035 HashEntry *he, *nhe; 2036 HashIter hi; 2037 2038 HashIter_Init(&hi, &cached_realpaths); 2039 he = HashIter_Next(&hi); 2040 while (he != NULL) { 2041 nhe = HashIter_Next(&hi); 2042 if (he->key[0] != '/') { 2043 DEBUG1(DIR, "cached_realpath: purging %s\n", he->key); 2044 HashTable_DeleteEntry(&cached_realpaths, he); 2045 /* XXX: What about the allocated he->value? Either 2046 * free them or document why they cannot be freed. */ 2047 } 2048 he = nhe; 2049 } 2050 } 2051 2052 char * 2053 cached_realpath(const char *pathname, char *resolved) 2054 { 2055 const char *rp; 2056 2057 if (pathname == NULL || pathname[0] == '\0') 2058 return NULL; 2059 2060 rp = HashTable_FindValue(&cached_realpaths, pathname); 2061 if (rp != NULL) { 2062 /* a hit */ 2063 strncpy(resolved, rp, MAXPATHLEN); 2064 resolved[MAXPATHLEN - 1] = '\0'; 2065 return resolved; 2066 } 2067 2068 rp = realpath(pathname, resolved); 2069 if (rp != NULL) { 2070 HashTable_Set(&cached_realpaths, pathname, bmake_strdup(rp)); 2071 DEBUG2(DIR, "cached_realpath: %s -> %s\n", pathname, rp); 2072 return resolved; 2073 } 2074 2075 /* should we negative-cache? */ 2076 return NULL; 2077 } 2078 2079 /* 2080 * Return true if we should die without noise. 2081 * For example our failing child was a sub-make or failure happened elsewhere. 2082 */ 2083 Boolean 2084 shouldDieQuietly(GNode *gn, int bf) 2085 { 2086 static int quietly = -1; 2087 2088 if (quietly < 0) { 2089 if (DEBUG(JOB) || !GetBooleanVar(".MAKE.DIE_QUIETLY", TRUE)) 2090 quietly = 0; 2091 else if (bf >= 0) 2092 quietly = bf; 2093 else 2094 quietly = (gn != NULL && (gn->type & OP_MAKE)) ? 1 : 0; 2095 } 2096 return quietly != 0; 2097 } 2098 2099 static void 2100 SetErrorVars(GNode *gn) 2101 { 2102 StringListNode *ln; 2103 2104 /* 2105 * We can print this even if there is no .ERROR target. 2106 */ 2107 Global_Set(".ERROR_TARGET", gn->name); 2108 Global_Delete(".ERROR_CMD"); 2109 2110 for (ln = gn->commands.first; ln != NULL; ln = ln->next) { 2111 const char *cmd = ln->datum; 2112 2113 if (cmd == NULL) 2114 break; 2115 Global_Append(".ERROR_CMD", cmd); 2116 } 2117 } 2118 2119 /* 2120 * Print some helpful information in case of an error. 2121 * The caller should exit soon after calling this function. 2122 */ 2123 void 2124 PrintOnError(GNode *gn, const char *msg) 2125 { 2126 static GNode *errorNode = NULL; 2127 2128 if (DEBUG(HASH)) { 2129 Targ_Stats(); 2130 Var_Stats(); 2131 } 2132 2133 if (errorNode != NULL) 2134 return; /* we've been here! */ 2135 2136 if (msg != NULL) 2137 printf("%s", msg); 2138 printf("\n%s: stopped in %s\n", progname, curdir); 2139 2140 /* we generally want to keep quiet if a sub-make died */ 2141 if (shouldDieQuietly(gn, -1)) 2142 return; 2143 2144 if (gn != NULL) 2145 SetErrorVars(gn); 2146 2147 { 2148 char *errorVarsValues; 2149 (void)Var_Subst("${MAKE_PRINT_VAR_ON_ERROR:@v@$v='${$v}'\n@}", 2150 SCOPE_GLOBAL, VARE_WANTRES, &errorVarsValues); 2151 /* TODO: handle errors */ 2152 printf("%s", errorVarsValues); 2153 free(errorVarsValues); 2154 } 2155 2156 fflush(stdout); 2157 2158 /* 2159 * Finally, see if there is a .ERROR target, and run it if so. 2160 */ 2161 errorNode = Targ_FindNode(".ERROR"); 2162 if (errorNode != NULL) { 2163 errorNode->type |= OP_SPECIAL; 2164 Compat_Make(errorNode, errorNode); 2165 } 2166 } 2167 2168 void 2169 Main_ExportMAKEFLAGS(Boolean first) 2170 { 2171 static Boolean once = TRUE; 2172 const char *expr; 2173 char *s; 2174 2175 if (once != first) 2176 return; 2177 once = FALSE; 2178 2179 expr = "${.MAKEFLAGS} ${.MAKEOVERRIDES:O:u:@v@$v=${$v:Q}@}"; 2180 (void)Var_Subst(expr, SCOPE_CMDLINE, VARE_WANTRES, &s); 2181 /* TODO: handle errors */ 2182 if (s[0] != '\0') { 2183 #ifdef POSIX 2184 setenv("MAKEFLAGS", s, 1); 2185 #else 2186 setenv("MAKE", s, 1); 2187 #endif 2188 } 2189 } 2190 2191 char * 2192 getTmpdir(void) 2193 { 2194 static char *tmpdir = NULL; 2195 struct stat st; 2196 2197 if (tmpdir != NULL) 2198 return tmpdir; 2199 2200 /* Honor $TMPDIR but only if it is valid. Ensure it ends with '/'. */ 2201 (void)Var_Subst("${TMPDIR:tA:U" _PATH_TMP "}/", 2202 SCOPE_GLOBAL, VARE_WANTRES, &tmpdir); 2203 /* TODO: handle errors */ 2204 2205 if (stat(tmpdir, &st) < 0 || !S_ISDIR(st.st_mode)) { 2206 free(tmpdir); 2207 tmpdir = bmake_strdup(_PATH_TMP); 2208 } 2209 return tmpdir; 2210 } 2211 2212 /* 2213 * Create and open a temp file using "pattern". 2214 * If out_fname is provided, set it to a copy of the filename created. 2215 * Otherwise unlink the file once open. 2216 */ 2217 int 2218 mkTempFile(const char *pattern, char **out_fname) 2219 { 2220 static char *tmpdir = NULL; 2221 char tfile[MAXPATHLEN]; 2222 int fd; 2223 2224 if (pattern == NULL) 2225 pattern = TMPPAT; 2226 if (tmpdir == NULL) 2227 tmpdir = getTmpdir(); 2228 if (pattern[0] == '/') { 2229 snprintf(tfile, sizeof tfile, "%s", pattern); 2230 } else { 2231 snprintf(tfile, sizeof tfile, "%s%s", tmpdir, pattern); 2232 } 2233 if ((fd = mkstemp(tfile)) < 0) 2234 Punt("Could not create temporary file %s: %s", tfile, 2235 strerror(errno)); 2236 if (out_fname != NULL) { 2237 *out_fname = bmake_strdup(tfile); 2238 } else { 2239 unlink(tfile); /* we just want the descriptor */ 2240 } 2241 return fd; 2242 } 2243 2244 /* 2245 * Convert a string representation of a boolean into a boolean value. 2246 * Anything that looks like "No", "False", "Off", "0" etc. is FALSE, 2247 * the empty string is the fallback, everything else is TRUE. 2248 */ 2249 Boolean 2250 ParseBoolean(const char *s, Boolean fallback) 2251 { 2252 char ch = ch_tolower(s[0]); 2253 if (ch == '\0') 2254 return fallback; 2255 if (ch == '0' || ch == 'f' || ch == 'n') 2256 return FALSE; 2257 if (ch == 'o') 2258 return ch_tolower(s[1]) != 'f'; 2259 return TRUE; 2260 } 2261
Indexes created Mon Sep 22 13:09:51 GMT 2025