1 /* $NetBSD: main.c,v 1.609 2024/01/07 01:33:57 sjg Exp $ */ 2 3 /* 4 * Copyright (c) 1988, 1989, 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Adam de Boor. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 /* 36 * Copyright (c) 1989 by Berkeley Softworks 37 * All rights reserved. 38 * 39 * This code is derived from software contributed to Berkeley by 40 * Adam de Boor. 41 * 42 * Redistribution and use in source and binary forms, with or without 43 * modification, are permitted provided that the following conditions 44 * are met: 45 * 1. Redistributions of source code must retain the above copyright 46 * notice, this list of conditions and the following disclaimer. 47 * 2. Redistributions in binary form must reproduce the above copyright 48 * notice, this list of conditions and the following disclaimer in the 49 * documentation and/or other materials provided with the distribution. 50 * 3. All advertising materials mentioning features or use of this software 51 * must display the following acknowledgement: 52 * This product includes software developed by the University of 53 * California, Berkeley and its contributors. 54 * 4. Neither the name of the University nor the names of its contributors 55 * may be used to endorse or promote products derived from this software 56 * without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 68 * SUCH DAMAGE. 69 */ 70 71 /* 72 * The main file for this entire program. Exit routines etc. reside here. 73 * 74 * Utility functions defined in this file: 75 * 76 * Main_ParseArgLine 77 * Parse and process command line arguments from a 78 * single string. Used to implement the special targets 79 * .MFLAGS and .MAKEFLAGS. 80 * 81 * Error Print a tagged error message. 82 * 83 * Fatal Print an error message and exit. 84 * 85 * Punt Abort all jobs and exit with a message. 86 * 87 * Finish Finish things up by printing the number of errors 88 * that occurred, and exit. 89 */ 90 91 #include <sys/types.h> 92 #include <sys/time.h> 93 #include <sys/param.h> 94 #include <sys/resource.h> 95 #include <sys/stat.h> 96 #if defined(MAKE_NATIVE) && defined(HAVE_SYSCTL) 97 #include <sys/sysctl.h> 98 #endif 99 #include <sys/utsname.h> 100 #include "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 1.609 2024/01/07 01:33:57 sjg Exp $"); 115 #if defined(MAKE_NATIVE) 116 __COPYRIGHT("@(#) Copyright (c) 1988, 1989, 1990, 1993 " 117 "The Regents of the University of California. " 118 "All rights reserved."); 119 #endif 120 121 #ifndef __arraycount 122 # define __arraycount(__x) (sizeof(__x) / sizeof(__x[0])) 123 #endif 124 125 CmdOpts opts; 126 time_t now; /* Time at start of make */ 127 GNode *defaultNode; /* .DEFAULT node */ 128 bool allPrecious; /* .PRECIOUS given on a line by itself */ 129 bool deleteOnError; /* .DELETE_ON_ERROR: set */ 130 131 static int maxJobTokens; /* -j argument */ 132 static bool enterFlagObj; /* -w and objdir != srcdir */ 133 134 static int jp_0 = -1, jp_1 = -1; /* ends of parent job pipe */ 135 bool doing_depend; /* Set while reading .depend */ 136 static bool jobsRunning; /* true if the jobs might be running */ 137 static const char *tracefile; 138 static bool ReadMakefile(const char *); 139 static void purge_relative_cached_realpaths(void); 140 141 static bool ignorePWD; /* if we use -C, PWD is meaningless */ 142 static char objdir[MAXPATHLEN + 1]; /* where we chdir'ed to */ 143 char curdir[MAXPATHLEN + 1]; /* Startup directory */ 144 const char *progname; 145 char *makeDependfile; 146 pid_t myPid; 147 int makelevel; 148 149 bool forceJobs = false; 150 static int main_errors = 0; 151 static HashTable cached_realpaths; 152 153 /* 154 * For compatibility with the POSIX version of MAKEFLAGS that includes 155 * all the options without '-', convert 'flags' to '-f -l -a -g -s '. 156 */ 157 static char * 158 explode(const char *flags) 159 { 160 char *exploded, *ep; 161 const char *p; 162 163 if (flags == NULL) 164 return NULL; 165 166 for (p = flags; *p != '\0'; p++) 167 if (!ch_isalpha(*p)) 168 return bmake_strdup(flags); 169 170 exploded = bmake_malloc((size_t)(p - flags) * 3 + 1); 171 for (p = flags, ep = exploded; *p != '\0'; p++) { 172 *ep++ = '-'; 173 *ep++ = *p; 174 *ep++ = ' '; 175 } 176 *ep = '\0'; 177 return exploded; 178 } 179 180 MAKE_ATTR_DEAD static void 181 usage(void) 182 { 183 size_t prognameLen = strcspn(progname, "["); 184 185 (void)fprintf(stderr, 186 "usage: %.*s [-BeikNnqrSstWwX]\n" 187 " [-C directory] [-D variable] [-d flags] [-f makefile]\n" 188 " [-I directory] [-J private] [-j max_jobs] [-m directory] [-T file]\n" 189 " [-V variable] [-v variable] [variable=value] [target ...]\n", 190 (int)prognameLen, progname); 191 exit(2); 192 } 193 194 static void 195 MainParseArgDebugFile(const char *arg) 196 { 197 const char *mode; 198 size_t len; 199 char *fname; 200 201 if (opts.debug_file != stdout && opts.debug_file != stderr) 202 fclose(opts.debug_file); 203 204 if (*arg == '+') { 205 arg++; 206 mode = "a"; 207 } else 208 mode = "w"; 209 210 if (strcmp(arg, "stdout") == 0) { 211 opts.debug_file = stdout; 212 return; 213 } 214 if (strcmp(arg, "stderr") == 0) { 215 opts.debug_file = stderr; 216 return; 217 } 218 219 len = strlen(arg); 220 fname = bmake_malloc(len + 20); 221 memcpy(fname, arg, len + 1); 222 223 /* Replace the trailing '%d' after '.%d' with the pid. */ 224 if (len >= 3 && memcmp(fname + len - 3, ".%d", 3) == 0) 225 snprintf(fname + len - 2, 20, "%d", getpid()); 226 227 opts.debug_file = fopen(fname, mode); 228 if (opts.debug_file == NULL) { 229 fprintf(stderr, "Cannot open debug file \"%s\"\n", fname); 230 exit(2); 231 } 232 free(fname); 233 } 234 235 static void 236 MainParseArgDebug(const char *argvalue) 237 { 238 const char *modules; 239 DebugFlags debug = opts.debug; 240 241 for (modules = argvalue; *modules != '\0'; modules++) { 242 switch (*modules) { 243 case '0': /* undocumented, only intended for tests */ 244 memset(&debug, 0, sizeof(debug)); 245 break; 246 case 'A': 247 memset(&debug, ~0, sizeof(debug)); 248 break; 249 case 'a': 250 debug.DEBUG_ARCH = true; 251 break; 252 case 'C': 253 debug.DEBUG_CWD = true; 254 break; 255 case 'c': 256 debug.DEBUG_COND = true; 257 break; 258 case 'd': 259 debug.DEBUG_DIR = true; 260 break; 261 case 'e': 262 debug.DEBUG_ERROR = true; 263 break; 264 case 'f': 265 debug.DEBUG_FOR = true; 266 break; 267 case 'g': 268 if (modules[1] == '1') { 269 debug.DEBUG_GRAPH1 = true; 270 modules++; 271 } else if (modules[1] == '2') { 272 debug.DEBUG_GRAPH2 = true; 273 modules++; 274 } else if (modules[1] == '3') { 275 debug.DEBUG_GRAPH3 = true; 276 modules++; 277 } 278 break; 279 case 'h': 280 debug.DEBUG_HASH = true; 281 break; 282 case 'j': 283 debug.DEBUG_JOB = true; 284 break; 285 case 'L': 286 opts.strict = true; 287 break; 288 case 'l': 289 debug.DEBUG_LOUD = true; 290 break; 291 case 'M': 292 debug.DEBUG_META = true; 293 break; 294 case 'm': 295 debug.DEBUG_MAKE = true; 296 break; 297 case 'n': 298 debug.DEBUG_SCRIPT = true; 299 break; 300 case 'p': 301 debug.DEBUG_PARSE = true; 302 break; 303 case 's': 304 debug.DEBUG_SUFF = true; 305 break; 306 case 't': 307 debug.DEBUG_TARG = true; 308 break; 309 case 'V': 310 opts.debugVflag = true; 311 break; 312 case 'v': 313 debug.DEBUG_VAR = true; 314 break; 315 case 'x': 316 debug.DEBUG_SHELL = true; 317 break; 318 case 'F': 319 MainParseArgDebugFile(modules + 1); 320 goto finish; 321 default: 322 (void)fprintf(stderr, 323 "%s: illegal argument to d option -- %c\n", 324 progname, *modules); 325 usage(); 326 } 327 } 328 329 finish: 330 opts.debug = debug; 331 332 setvbuf(opts.debug_file, NULL, _IONBF, 0); 333 if (opts.debug_file != stdout) 334 setvbuf(stdout, NULL, _IOLBF, 0); 335 } 336 337 /* Is path relative or does it contain any relative component "." or ".."? */ 338 static bool 339 IsRelativePath(const char *path) 340 { 341 const char *p; 342 343 if (path[0] != '/') 344 return true; 345 p = path; 346 while ((p = strstr(p, "/.")) != NULL) { 347 p += 2; 348 if (*p == '.') 349 p++; 350 if (*p == '/' || *p == '\0') 351 return true; 352 } 353 return false; 354 } 355 356 static void 357 MainParseArgChdir(const char *argvalue) 358 { 359 struct stat sa, sb; 360 361 if (chdir(argvalue) == -1) { 362 (void)fprintf(stderr, "%s: chdir %s: %s\n", 363 progname, argvalue, strerror(errno)); 364 exit(2); /* Not 1 so -q can distinguish error */ 365 } 366 if (getcwd(curdir, MAXPATHLEN) == NULL) { 367 (void)fprintf(stderr, "%s: %s.\n", progname, strerror(errno)); 368 exit(2); 369 } 370 if (!IsRelativePath(argvalue) && 371 stat(argvalue, &sa) != -1 && 372 stat(curdir, &sb) != -1 && 373 sa.st_ino == sb.st_ino && 374 sa.st_dev == sb.st_dev) 375 strncpy(curdir, argvalue, MAXPATHLEN); 376 ignorePWD = true; 377 } 378 379 static void 380 MainParseArgJobsInternal(const char *argvalue) 381 { 382 char end; 383 if (sscanf(argvalue, "%d,%d%c", &jp_0, &jp_1, &end) != 2) { 384 (void)fprintf(stderr, 385 "%s: internal error -- J option malformed (%s)\n", 386 progname, argvalue); 387 usage(); 388 } 389 if ((fcntl(jp_0, F_GETFD, 0) < 0) || 390 (fcntl(jp_1, F_GETFD, 0) < 0)) { 391 jp_0 = -1; 392 jp_1 = -1; 393 opts.compatMake = true; 394 } else { 395 Global_Append(MAKEFLAGS, "-J"); 396 Global_Append(MAKEFLAGS, argvalue); 397 } 398 } 399 400 static void 401 MainParseArgJobs(const char *arg) 402 { 403 const char *p; 404 char *end; 405 char v[12]; 406 407 forceJobs = true; 408 opts.maxJobs = (int)strtol(arg, &end, 0); 409 p = end; 410 #ifdef _SC_NPROCESSORS_ONLN 411 if (*p != '\0') { 412 double d; 413 414 if (*p == 'C') 415 d = (opts.maxJobs > 0) ? opts.maxJobs : 1; 416 else if (*p == '.') { 417 d = strtod(arg, &end); 418 p = end; 419 } else 420 d = 0.0; 421 if (d > 0.0) { 422 p = ""; 423 opts.maxJobs = (int)sysconf(_SC_NPROCESSORS_ONLN); 424 opts.maxJobs = (int)(d * (double)opts.maxJobs); 425 } 426 } 427 #endif 428 if (*p != '\0' || opts.maxJobs < 1) { 429 (void)fprintf(stderr, 430 "%s: argument '%s' to option '-j' " 431 "must be a positive number\n", 432 progname, arg); 433 exit(2); /* Not 1 so -q can distinguish error */ 434 } 435 snprintf(v, sizeof(v), "%d", opts.maxJobs); 436 Global_Append(MAKEFLAGS, "-j"); 437 Global_Append(MAKEFLAGS, v); 438 Global_Set(".MAKE.JOBS", v); 439 maxJobTokens = opts.maxJobs; 440 } 441 442 static void 443 MainParseArgSysInc(const char *argvalue) 444 { 445 if (strncmp(argvalue, ".../", 4) == 0) { 446 char *found_path = Dir_FindHereOrAbove(curdir, argvalue + 4); 447 if (found_path == NULL) 448 return; 449 (void)SearchPath_Add(sysIncPath, found_path); 450 free(found_path); 451 } else { 452 (void)SearchPath_Add(sysIncPath, argvalue); 453 } 454 Global_Append(MAKEFLAGS, "-m"); 455 Global_Append(MAKEFLAGS, argvalue); 456 Dir_SetSYSPATH(); 457 } 458 459 static bool 460 MainParseOption(char c, const char *argvalue) 461 { 462 switch (c) { 463 case '\0': 464 break; 465 case 'B': 466 opts.compatMake = true; 467 Global_Append(MAKEFLAGS, "-B"); 468 Global_Set(".MAKE.MODE", "compat"); 469 break; 470 case 'C': 471 MainParseArgChdir(argvalue); 472 break; 473 case 'D': 474 if (argvalue[0] == '\0') 475 return false; 476 Var_SetExpand(SCOPE_GLOBAL, argvalue, "1"); 477 Global_Append(MAKEFLAGS, "-D"); 478 Global_Append(MAKEFLAGS, argvalue); 479 break; 480 case 'I': 481 SearchPath_Add(parseIncPath, argvalue); 482 Global_Append(MAKEFLAGS, "-I"); 483 Global_Append(MAKEFLAGS, argvalue); 484 break; 485 case 'J': 486 MainParseArgJobsInternal(argvalue); 487 break; 488 case 'N': 489 opts.noExecute = true; 490 opts.noRecursiveExecute = true; 491 Global_Append(MAKEFLAGS, "-N"); 492 break; 493 case 'S': 494 opts.keepgoing = false; 495 Global_Append(MAKEFLAGS, "-S"); 496 break; 497 case 'T': 498 tracefile = bmake_strdup(argvalue); 499 Global_Append(MAKEFLAGS, "-T"); 500 Global_Append(MAKEFLAGS, argvalue); 501 break; 502 case 'V': 503 case 'v': 504 opts.printVars = c == 'v' ? PVM_EXPANDED : PVM_UNEXPANDED; 505 Lst_Append(&opts.variables, bmake_strdup(argvalue)); 506 /* XXX: Why always -V? */ 507 Global_Append(MAKEFLAGS, "-V"); 508 Global_Append(MAKEFLAGS, argvalue); 509 break; 510 case 'W': 511 opts.parseWarnFatal = true; 512 /* XXX: why no Global_Append? */ 513 break; 514 case 'X': 515 opts.varNoExportEnv = true; 516 Global_Append(MAKEFLAGS, "-X"); 517 break; 518 case 'd': 519 /* If '-d-opts' don't pass to children */ 520 if (argvalue[0] == '-') 521 argvalue++; 522 else { 523 Global_Append(MAKEFLAGS, "-d"); 524 Global_Append(MAKEFLAGS, argvalue); 525 } 526 MainParseArgDebug(argvalue); 527 break; 528 case 'e': 529 opts.checkEnvFirst = true; 530 Global_Append(MAKEFLAGS, "-e"); 531 break; 532 case 'f': 533 Lst_Append(&opts.makefiles, bmake_strdup(argvalue)); 534 break; 535 case 'i': 536 opts.ignoreErrors = true; 537 Global_Append(MAKEFLAGS, "-i"); 538 break; 539 case 'j': 540 MainParseArgJobs(argvalue); 541 break; 542 case 'k': 543 opts.keepgoing = true; 544 Global_Append(MAKEFLAGS, "-k"); 545 break; 546 case 'm': 547 MainParseArgSysInc(argvalue); 548 /* XXX: why no Var_Append? */ 549 break; 550 case 'n': 551 opts.noExecute = true; 552 Global_Append(MAKEFLAGS, "-n"); 553 break; 554 case 'q': 555 opts.query = true; 556 /* Kind of nonsensical, wot? */ 557 Global_Append(MAKEFLAGS, "-q"); 558 break; 559 case 'r': 560 opts.noBuiltins = true; 561 Global_Append(MAKEFLAGS, "-r"); 562 break; 563 case 's': 564 opts.silent = true; 565 Global_Append(MAKEFLAGS, "-s"); 566 break; 567 case 't': 568 opts.touch = true; 569 Global_Append(MAKEFLAGS, "-t"); 570 break; 571 case 'w': 572 opts.enterFlag = true; 573 Global_Append(MAKEFLAGS, "-w"); 574 break; 575 default: 576 usage(); 577 } 578 return true; 579 } 580 581 /* 582 * Parse the given arguments. Called from main() and from 583 * Main_ParseArgLine() when the .MAKEFLAGS target is used. 584 * 585 * The arguments must be treated as read-only and will be freed after the 586 * call. 587 * 588 * XXX: Deal with command line overriding .MAKEFLAGS in makefile 589 */ 590 static void 591 MainParseArgs(int argc, char **argv) 592 { 593 char c; 594 int arginc; 595 char *argvalue; 596 char *optscan; 597 bool inOption, dashDash = false; 598 599 const char *optspecs = "BC:D:I:J:NST:V:WXd:ef:ij:km:nqrstv:w"; 600 /* Can't actually use getopt(3) because rescanning is not portable */ 601 602 rearg: 603 inOption = false; 604 optscan = NULL; 605 while (argc > 1) { 606 const char *optspec; 607 if (!inOption) 608 optscan = argv[1]; 609 c = *optscan++; 610 arginc = 0; 611 if (inOption) { 612 if (c == '\0') { 613 argv++; 614 argc--; 615 inOption = false; 616 continue; 617 } 618 } else { 619 if (c != '-' || dashDash) 620 break; 621 inOption = true; 622 c = *optscan++; 623 } 624 /* '-' found at some earlier point */ 625 optspec = strchr(optspecs, c); 626 if (c != '\0' && optspec != NULL && optspec[1] == ':') { 627 /* 628 * -<something> found, and <something> should have an 629 * argument 630 */ 631 inOption = false; 632 arginc = 1; 633 argvalue = optscan; 634 if (*argvalue == '\0') { 635 if (argc < 3) 636 goto noarg; 637 argvalue = argv[2]; 638 arginc = 2; 639 } 640 } else { 641 argvalue = NULL; 642 } 643 switch (c) { 644 case '\0': 645 arginc = 1; 646 inOption = false; 647 break; 648 case '-': 649 dashDash = true; 650 break; 651 default: 652 if (!MainParseOption(c, argvalue)) 653 goto noarg; 654 } 655 argv += arginc; 656 argc -= arginc; 657 } 658 659 /* 660 * See if the rest of the arguments are variable assignments and 661 * perform them if so. Else take them to be targets and stuff them 662 * on the end of the "create" list. 663 */ 664 for (; argc > 1; argv++, argc--) { 665 if (!Parse_VarAssign(argv[1], false, SCOPE_CMDLINE)) { 666 if (argv[1][0] == '\0') 667 Punt("illegal (null) argument."); 668 if (argv[1][0] == '-' && !dashDash) 669 goto rearg; 670 Lst_Append(&opts.create, bmake_strdup(argv[1])); 671 } 672 } 673 674 return; 675 noarg: 676 (void)fprintf(stderr, "%s: option requires an argument -- %c\n", 677 progname, c); 678 usage(); 679 } 680 681 /* 682 * Break a line of arguments into words and parse them. 683 * 684 * Used when a .MFLAGS or .MAKEFLAGS target is encountered during parsing and 685 * by main() when reading the MAKEFLAGS environment variable. 686 */ 687 void 688 Main_ParseArgLine(const char *line) 689 { 690 Words words; 691 char *buf; 692 const char *p; 693 694 if (line == NULL) 695 return; 696 for (p = line; *p == ' '; p++) 697 continue; 698 if (p[0] == '\0') 699 return; 700 701 #ifndef POSIX 702 { 703 /* 704 * $MAKE may simply be naming the make(1) binary 705 */ 706 char *cp; 707 708 if (!(cp = strrchr(line, '/'))) 709 cp = line; 710 if ((cp = strstr(cp, "make")) && 711 strcmp(cp, "make") == 0) 712 return; 713 } 714 #endif 715 { 716 FStr argv0 = Var_Value(SCOPE_GLOBAL, ".MAKE"); 717 buf = str_concat3(argv0.str, " ", p); 718 FStr_Done(&argv0); 719 } 720 721 words = Str_Words(buf, true); 722 if (words.words == NULL) { 723 Error("Unterminated quoted string [%s]", buf); 724 free(buf); 725 return; 726 } 727 free(buf); 728 MainParseArgs((int)words.len, words.words); 729 730 Words_Free(words); 731 } 732 733 bool 734 Main_SetObjdir(bool writable, const char *fmt, ...) 735 { 736 struct stat sb; 737 char *path; 738 char buf[MAXPATHLEN + 1]; 739 char buf2[MAXPATHLEN + 1]; 740 va_list ap; 741 742 va_start(ap, fmt); 743 vsnprintf(path = buf, MAXPATHLEN, fmt, ap); 744 va_end(ap); 745 746 if (path[0] != '/') { 747 if (snprintf(buf2, MAXPATHLEN, "%s/%s", curdir, path) <= MAXPATHLEN) 748 path = buf2; 749 else 750 return false; 751 } 752 753 /* look for the directory and try to chdir there */ 754 if (stat(path, &sb) != 0 || !S_ISDIR(sb.st_mode)) 755 return false; 756 757 if ((writable && access(path, W_OK) != 0) || chdir(path) != 0) { 758 (void)fprintf(stderr, "%s: warning: %s: %s.\n", 759 progname, path, strerror(errno)); 760 return false; 761 } 762 763 snprintf(objdir, sizeof objdir, "%s", path); 764 Global_Set(".OBJDIR", objdir); 765 setenv("PWD", objdir, 1); 766 Dir_InitDot(); 767 purge_relative_cached_realpaths(); 768 if (opts.enterFlag && strcmp(objdir, curdir) != 0) 769 enterFlagObj = true; 770 return true; 771 } 772 773 static bool 774 SetVarObjdir(bool writable, const char *var, const char *suffix) 775 { 776 FStr path = Var_Value(SCOPE_CMDLINE, var); 777 778 if (path.str == NULL || path.str[0] == '\0') { 779 FStr_Done(&path); 780 return false; 781 } 782 783 Var_Expand(&path, SCOPE_GLOBAL, VARE_WANTRES); 784 785 (void)Main_SetObjdir(writable, "%s%s", path.str, suffix); 786 787 FStr_Done(&path); 788 return true; 789 } 790 791 /* 792 * Splits str into words (in-place, modifying it), adding them to the list. 793 * The string must be kept alive as long as the list. 794 */ 795 void 796 AppendWords(StringList *lp, char *str) 797 { 798 char *p; 799 const char *sep = " \t"; 800 801 for (p = strtok(str, sep); p != NULL; p = strtok(NULL, sep)) 802 Lst_Append(lp, p); 803 } 804 805 #ifdef SIGINFO 806 /*ARGSUSED*/ 807 static void 808 siginfo(int signo MAKE_ATTR_UNUSED) 809 { 810 char dir[MAXPATHLEN]; 811 char str[2 * MAXPATHLEN]; 812 int len; 813 if (getcwd(dir, sizeof dir) == NULL) 814 return; 815 len = snprintf(str, sizeof str, "%s: Working in: %s\n", progname, dir); 816 if (len > 0) 817 (void)write(STDERR_FILENO, str, (size_t)len); 818 } 819 #endif 820 821 /* Allow makefiles some control over the mode we run in. */ 822 static void 823 MakeMode(void) 824 { 825 char *mode = Var_Subst("${.MAKE.MODE:tl}", 826 SCOPE_GLOBAL, VARE_WANTRES); 827 /* TODO: handle errors */ 828 829 if (mode[0] != '\0') { 830 if (strstr(mode, "compat") != NULL) { 831 opts.compatMake = true; 832 forceJobs = false; 833 } 834 #if USE_META 835 if (strstr(mode, "meta") != NULL) 836 meta_mode_init(mode); 837 #endif 838 if (strstr(mode, "randomize-targets") != NULL) 839 opts.randomizeTargets = true; 840 } 841 842 free(mode); 843 } 844 845 static void 846 PrintVar(const char *varname, bool expandVars) 847 { 848 if (strchr(varname, '$') != NULL) { 849 char *evalue = Var_Subst(varname, SCOPE_GLOBAL, VARE_WANTRES); 850 /* TODO: handle errors */ 851 printf("%s\n", evalue); 852 free(evalue); 853 854 } else if (expandVars) { 855 char *expr = str_concat3("${", varname, "}"); 856 char *evalue = Var_Subst(expr, SCOPE_GLOBAL, VARE_WANTRES); 857 /* TODO: handle errors */ 858 free(expr); 859 printf("%s\n", evalue); 860 free(evalue); 861 862 } else { 863 FStr value = Var_Value(SCOPE_GLOBAL, varname); 864 printf("%s\n", value.str != NULL ? value.str : ""); 865 FStr_Done(&value); 866 } 867 } 868 869 /* 870 * Return a bool based on a variable. 871 * 872 * If the knob is not set, return the fallback. 873 * If set, anything that looks or smells like "No", "False", "Off", "0", etc. 874 * is false, otherwise true. 875 */ 876 bool 877 GetBooleanExpr(const char *expr, bool fallback) 878 { 879 char *value; 880 bool res; 881 882 value = Var_Subst(expr, SCOPE_GLOBAL, VARE_WANTRES); 883 /* TODO: handle errors */ 884 res = ParseBoolean(value, fallback); 885 free(value); 886 return res; 887 } 888 889 static void 890 doPrintVars(void) 891 { 892 StringListNode *ln; 893 bool expandVars; 894 895 if (opts.printVars == PVM_EXPANDED) 896 expandVars = true; 897 else if (opts.debugVflag) 898 expandVars = false; 899 else 900 expandVars = GetBooleanExpr("${.MAKE.EXPAND_VARIABLES}", 901 false); 902 903 for (ln = opts.variables.first; ln != NULL; ln = ln->next) { 904 const char *varname = ln->datum; 905 PrintVar(varname, expandVars); 906 } 907 } 908 909 static bool 910 runTargets(void) 911 { 912 GNodeList targs = LST_INIT; /* target nodes to create */ 913 bool outOfDate; /* false if all targets up to date */ 914 915 /* 916 * Have now read the entire graph and need to make a list of 917 * targets to create. If none was given on the command line, 918 * we consult the parsing module to find the main target(s) 919 * to create. 920 */ 921 if (Lst_IsEmpty(&opts.create)) 922 Parse_MainName(&targs); 923 else 924 Targ_FindList(&targs, &opts.create); 925 926 if (!opts.compatMake) { 927 /* 928 * Initialize job module before traversing the graph 929 * now that any .BEGIN and .END targets have been read. 930 * This is done only if the -q flag wasn't given 931 * (to prevent the .BEGIN from being executed should 932 * it exist). 933 */ 934 if (!opts.query) { 935 Job_Init(); 936 jobsRunning = true; 937 } 938 939 /* Traverse the graph, checking on all the targets */ 940 outOfDate = Make_Run(&targs); 941 } else { 942 Compat_MakeAll(&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 created. 951 * If none specified, make the variable empty for now, the parser will fill 952 * in the default or .MAIN target later. 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 #ifdef FORCE_MACHINE 983 return FORCE_MACHINE; 984 #else 985 const char *machine = getenv("MACHINE"); 986 987 if (machine != NULL) 988 return machine; 989 990 #if defined(MAKE_NATIVE) 991 return utsname->machine; 992 #elif defined(MAKE_MACHINE) 993 return MAKE_MACHINE; 994 #else 995 return "unknown"; 996 #endif 997 #endif 998 } 999 1000 static const char * 1001 InitVarMachineArch(void) 1002 { 1003 #ifdef FORCE_MACHINE_ARCH 1004 return FORCE_MACHINE_ARCH; 1005 #else 1006 const char *env = getenv("MACHINE_ARCH"); 1007 if (env != NULL) 1008 return env; 1009 1010 #if defined(MAKE_NATIVE) && defined(CTL_HW) 1011 { 1012 struct utsname utsname; 1013 static char machine_arch_buf[sizeof utsname.machine]; 1014 const int mib[2] = { CTL_HW, HW_MACHINE_ARCH }; 1015 size_t len = sizeof machine_arch_buf; 1016 1017 if (sysctl(mib, (unsigned int)__arraycount(mib), 1018 machine_arch_buf, &len, NULL, 0) < 0) { 1019 (void)fprintf(stderr, "%s: sysctl failed (%s).\n", 1020 progname, strerror(errno)); 1021 exit(2); 1022 } 1023 1024 return machine_arch_buf; 1025 } 1026 #elif defined(MACHINE_ARCH) 1027 return MACHINE_ARCH; 1028 #elif defined(MAKE_MACHINE_ARCH) 1029 return MAKE_MACHINE_ARCH; 1030 #else 1031 return "unknown"; 1032 #endif 1033 #endif 1034 } 1035 1036 #ifndef NO_PWD_OVERRIDE 1037 /* 1038 * Overriding getcwd() with $PWD totally breaks MAKEOBJDIRPREFIX 1039 * since the value of curdir can vary depending on how we got 1040 * here. That is, sitting at a shell prompt (shell that provides $PWD) 1041 * or via subdir.mk, in which case it's likely a shell which does 1042 * not provide it. 1043 * 1044 * So, to stop it breaking this case only, we ignore PWD if 1045 * MAKEOBJDIRPREFIX is set or MAKEOBJDIR contains an expression. 1046 */ 1047 static void 1048 HandlePWD(const struct stat *curdir_st) 1049 { 1050 char *pwd; 1051 FStr makeobjdir; 1052 struct stat pwd_st; 1053 1054 if (ignorePWD || (pwd = getenv("PWD")) == NULL) 1055 return; 1056 1057 if (Var_Exists(SCOPE_CMDLINE, "MAKEOBJDIRPREFIX")) 1058 return; 1059 1060 makeobjdir = Var_Value(SCOPE_CMDLINE, "MAKEOBJDIR"); 1061 if (makeobjdir.str != NULL && strchr(makeobjdir.str, '$') != 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, MAKEOBJDIR is set 1076 * in the environment, try only that value and fall back to .CURDIR if it 1077 * 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 of these 1081 * paths exist, just use .CURDIR. 1082 */ 1083 static void 1084 InitObjdir(const char *machine, const char *machine_arch) 1085 { 1086 bool writable; 1087 1088 Dir_InitCur(curdir); 1089 writable = GetBooleanExpr("${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(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE) 1105 struct rlimit rl; 1106 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 && 1107 rl.rlim_cur != rl.rlim_max) { 1108 #ifdef BMAKE_NOFILE_MAX 1109 if (BMAKE_NOFILE_MAX < rl.rlim_max) 1110 rl.rlim_cur = BMAKE_NOFILE_MAX; 1111 else 1112 #endif 1113 rl.rlim_cur = rl.rlim_max; 1114 (void)setrlimit(RLIMIT_NOFILE, &rl); 1115 } 1116 #endif 1117 } 1118 1119 static void 1120 CmdOpts_Init(void) 1121 { 1122 opts.compatMake = false; 1123 memset(&opts.debug, 0, sizeof(opts.debug)); 1124 /* opts.debug_file has already been initialized earlier */ 1125 opts.strict = false; 1126 opts.debugVflag = false; 1127 opts.checkEnvFirst = false; 1128 Lst_Init(&opts.makefiles); 1129 opts.ignoreErrors = false; /* Pay attention to non-zero returns */ 1130 opts.maxJobs = 1; 1131 opts.keepgoing = false; /* Stop on error */ 1132 opts.noRecursiveExecute = false; /* Execute all .MAKE targets */ 1133 opts.noExecute = false; /* Execute all commands */ 1134 opts.query = false; 1135 opts.noBuiltins = false; /* Read the built-in rules */ 1136 opts.silent = false; /* Print commands as executed */ 1137 opts.touch = false; 1138 opts.printVars = PVM_NONE; 1139 Lst_Init(&opts.variables); 1140 opts.parseWarnFatal = false; 1141 opts.enterFlag = false; 1142 opts.varNoExportEnv = false; 1143 Lst_Init(&opts.create); 1144 } 1145 1146 /* 1147 * Initialize MAKE and .MAKE to the path of the executable, so that it can be 1148 * found by execvp(3) and the shells, even after a chdir. 1149 * 1150 * If it's a relative path and contains a '/', resolve it to an absolute path. 1151 * Otherwise keep it as is, assuming it will be found in the PATH. 1152 */ 1153 static void 1154 InitVarMake(const char *argv0) 1155 { 1156 const char *make = argv0; 1157 1158 if (argv0[0] != '/' && strchr(argv0, '/') != NULL) { 1159 char pathbuf[MAXPATHLEN]; 1160 const char *abspath = cached_realpath(argv0, pathbuf); 1161 struct stat st; 1162 if (abspath != NULL && abspath[0] == '/' && 1163 stat(make, &st) == 0) 1164 make = abspath; 1165 } 1166 1167 Global_Set("MAKE", make); 1168 Global_Set(".MAKE", make); 1169 } 1170 1171 /* 1172 * Add the directories from the colon-separated syspath to defSysIncPath. 1173 * After returning, the contents of syspath is unspecified. 1174 */ 1175 static void 1176 InitDefSysIncPath(char *syspath) 1177 { 1178 static char defsyspath[] = _PATH_DEFSYSPATH; 1179 char *start, *p; 1180 1181 /* 1182 * If no user-supplied system path was given (through the -m option) 1183 * add the directories from the DEFSYSPATH (more than one may be given 1184 * as dir1:...:dirn) to the system include path. 1185 */ 1186 if (syspath == NULL || syspath[0] == '\0') 1187 syspath = defsyspath; 1188 else 1189 syspath = bmake_strdup(syspath); 1190 1191 for (start = syspath; *start != '\0'; start = p) { 1192 for (p = start; *p != '\0' && *p != ':'; p++) 1193 continue; 1194 if (*p == ':') 1195 *p++ = '\0'; 1196 1197 /* look for magic parent directory search string */ 1198 if (strncmp(start, ".../", 4) == 0) { 1199 char *dir = Dir_FindHereOrAbove(curdir, start + 4); 1200 if (dir != NULL) { 1201 (void)SearchPath_Add(defSysIncPath, dir); 1202 free(dir); 1203 } 1204 } else { 1205 (void)SearchPath_Add(defSysIncPath, start); 1206 } 1207 } 1208 1209 if (syspath != defsyspath) 1210 free(syspath); 1211 } 1212 1213 static void 1214 ReadBuiltinRules(void) 1215 { 1216 StringListNode *ln; 1217 StringList sysMkFiles = LST_INIT; 1218 1219 SearchPath_Expand( 1220 Lst_IsEmpty(&sysIncPath->dirs) ? defSysIncPath : sysIncPath, 1221 _PATH_DEFSYSMK, 1222 &sysMkFiles); 1223 if (Lst_IsEmpty(&sysMkFiles)) 1224 Fatal("%s: no system rules (%s).", progname, _PATH_DEFSYSMK); 1225 1226 for (ln = sysMkFiles.first; ln != NULL; ln = ln->next) 1227 if (ReadMakefile(ln->datum)) 1228 break; 1229 1230 if (ln == NULL) 1231 Fatal("%s: cannot open %s.", 1232 progname, (const char *)sysMkFiles.first->datum); 1233 1234 Lst_DoneCall(&sysMkFiles, free); 1235 } 1236 1237 static void 1238 InitMaxJobs(void) 1239 { 1240 char *value; 1241 int n; 1242 1243 if (forceJobs || opts.compatMake || 1244 !Var_Exists(SCOPE_GLOBAL, ".MAKE.JOBS")) 1245 return; 1246 1247 value = Var_Subst("${.MAKE.JOBS}", SCOPE_GLOBAL, VARE_WANTRES); 1248 /* TODO: handle errors */ 1249 n = (int)strtol(value, NULL, 0); 1250 if (n < 1) { 1251 (void)fprintf(stderr, 1252 "%s: illegal value for .MAKE.JOBS " 1253 "-- must be positive integer!\n", 1254 progname); 1255 exit(2); /* Not 1 so -q can distinguish error */ 1256 } 1257 1258 if (n != opts.maxJobs) { 1259 Global_Append(MAKEFLAGS, "-j"); 1260 Global_Append(MAKEFLAGS, value); 1261 } 1262 1263 opts.maxJobs = n; 1264 maxJobTokens = opts.maxJobs; 1265 forceJobs = true; 1266 free(value); 1267 } 1268 1269 /* 1270 * For compatibility, look at the directories in the VPATH variable 1271 * and add them to the search path, if the variable is defined. The 1272 * variable's value is in the same format as the PATH environment 1273 * variable, i.e. <directory>:<directory>:<directory>... 1274 */ 1275 static void 1276 InitVpath(void) 1277 { 1278 char *vpath, savec, *path; 1279 if (!Var_Exists(SCOPE_CMDLINE, "VPATH")) 1280 return; 1281 1282 vpath = Var_Subst("${VPATH}", SCOPE_CMDLINE, VARE_WANTRES); 1283 /* TODO: handle errors */ 1284 path = vpath; 1285 do { 1286 char *p; 1287 /* skip to end of directory */ 1288 for (p = path; *p != ':' && *p != '\0'; p++) 1289 continue; 1290 /* Save terminator character so know when to stop */ 1291 savec = *p; 1292 *p = '\0'; 1293 /* Add directory to search path */ 1294 (void)SearchPath_Add(&dirSearchPath, path); 1295 *p = savec; 1296 path = p + 1; 1297 } while (savec == ':'); 1298 free(vpath); 1299 } 1300 1301 static void 1302 ReadAllMakefiles(const StringList *makefiles) 1303 { 1304 StringListNode *ln; 1305 1306 for (ln = makefiles->first; ln != NULL; ln = ln->next) { 1307 const char *fname = ln->datum; 1308 if (!ReadMakefile(fname)) 1309 Fatal("%s: cannot open %s.", progname, fname); 1310 } 1311 } 1312 1313 static void 1314 ReadFirstDefaultMakefile(void) 1315 { 1316 StringList makefiles = LST_INIT; 1317 StringListNode *ln; 1318 char *prefs = Var_Subst("${.MAKE.MAKEFILE_PREFERENCE}", 1319 SCOPE_CMDLINE, VARE_WANTRES); 1320 /* TODO: handle errors */ 1321 1322 AppendWords(&makefiles, prefs); 1323 1324 for (ln = makefiles.first; ln != NULL; ln = ln->next) 1325 if (ReadMakefile(ln->datum)) 1326 break; 1327 1328 Lst_Done(&makefiles); 1329 free(prefs); 1330 } 1331 1332 /* 1333 * Initialize variables such as MAKE, MACHINE, .MAKEFLAGS. 1334 * Initialize a few modules. 1335 * Parse the arguments from MAKEFLAGS and the command line. 1336 */ 1337 static void 1338 main_Init(int argc, char **argv) 1339 { 1340 struct stat sa; 1341 const char *machine; 1342 const char *machine_arch; 1343 char *syspath = getenv("MAKESYSPATH"); 1344 struct utsname utsname; 1345 1346 /* default to writing debug to stderr */ 1347 opts.debug_file = stderr; 1348 1349 Str_Intern_Init(); 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 machine = InitVarMachine(&utsname); 1369 machine_arch = InitVarMachineArch(); 1370 1371 myPid = getpid(); /* remember this for vFork() */ 1372 1373 /* Just in case MAKEOBJDIR wants us to do something tricky. */ 1374 Targ_Init(); 1375 Var_Init(); 1376 Global_Set_ReadOnly(".MAKE.OS", utsname.sysname); 1377 Global_Set("MACHINE", machine); 1378 Global_Set("MACHINE_ARCH", machine_arch); 1379 #ifdef MAKE_VERSION 1380 Global_Set("MAKE_VERSION", MAKE_VERSION); 1381 #endif 1382 Global_Set_ReadOnly(".newline", "\n"); 1383 #ifndef MAKEFILE_PREFERENCE_LIST 1384 /* This is the traditional preference for makefiles. */ 1385 # define MAKEFILE_PREFERENCE_LIST "makefile Makefile" 1386 #endif 1387 Global_Set(".MAKE.MAKEFILE_PREFERENCE", MAKEFILE_PREFERENCE_LIST); 1388 Global_Set(".MAKE.DEPENDFILE", ".depend"); 1389 /* Tell makefiles like jobs.mk whether we support -jC */ 1390 #ifdef _SC_NPROCESSORS_ONLN 1391 Global_Set_ReadOnly(".MAKE.JOBS.C", "yes"); 1392 #else 1393 Global_Set_ReadOnly(".MAKE.JOBS.C", "no"); 1394 #endif 1395 1396 CmdOpts_Init(); 1397 allPrecious = false; /* Remove targets when interrupted */ 1398 deleteOnError = false; /* Historical default behavior */ 1399 jobsRunning = false; 1400 1401 maxJobTokens = opts.maxJobs; 1402 ignorePWD = false; 1403 1404 /* 1405 * Initialize the parsing, directory and variable modules to prepare 1406 * for the reading of inclusion paths and variable settings on the 1407 * command line 1408 */ 1409 1410 /* 1411 * Initialize various variables. 1412 * MAKE also gets this name, for compatibility 1413 * .MAKEFLAGS gets set to the empty string just in case. 1414 * MFLAGS also gets initialized empty, for compatibility. 1415 */ 1416 Parse_Init(); 1417 InitVarMake(argv[0]); 1418 Global_Set(MAKEFLAGS, ""); 1419 Global_Set(".MAKEOVERRIDES", ""); 1420 Global_Set("MFLAGS", ""); 1421 Global_Set(".ALLTARGETS", ""); 1422 Var_Set(SCOPE_CMDLINE, ".MAKE.LEVEL.ENV", MAKE_LEVEL_ENV); 1423 1424 /* Set some other useful variables. */ 1425 { 1426 char buf[64], *ep = getenv(MAKE_LEVEL_ENV); 1427 1428 makelevel = ep != NULL && ep[0] != '\0' ? atoi(ep) : 0; 1429 if (makelevel < 0) 1430 makelevel = 0; 1431 snprintf(buf, sizeof buf, "%d", makelevel); 1432 Global_Set(".MAKE.LEVEL", buf); 1433 snprintf(buf, sizeof buf, "%u", myPid); 1434 Global_Set_ReadOnly(".MAKE.PID", buf); 1435 snprintf(buf, sizeof buf, "%u", getppid()); 1436 Global_Set_ReadOnly(".MAKE.PPID", buf); 1437 snprintf(buf, sizeof buf, "%u", getuid()); 1438 Global_Set_ReadOnly(".MAKE.UID", buf); 1439 snprintf(buf, sizeof buf, "%u", getgid()); 1440 Global_Set_ReadOnly(".MAKE.GID", buf); 1441 } 1442 if (makelevel > 0) { 1443 char pn[1024]; 1444 snprintf(pn, sizeof pn, "%s[%d]", progname, makelevel); 1445 progname = bmake_strdup(pn); 1446 } 1447 1448 #ifdef USE_META 1449 meta_init(); 1450 #endif 1451 Dir_Init(); 1452 1453 #ifdef POSIX 1454 { 1455 char *makeflags = explode(getenv("MAKEFLAGS")); 1456 Main_ParseArgLine(makeflags); 1457 free(makeflags); 1458 } 1459 #else 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 Main_ParseArgLine(getenv("MAKE")); 1466 #endif 1467 1468 if (getcwd(curdir, MAXPATHLEN) == NULL) { 1469 (void)fprintf(stderr, "%s: getcwd: %s.\n", 1470 progname, strerror(errno)); 1471 exit(2); 1472 } 1473 1474 MainParseArgs(argc, argv); 1475 1476 if (opts.enterFlag) 1477 printf("%s: Entering directory `%s'\n", progname, curdir); 1478 1479 if (stat(curdir, &sa) == -1) { 1480 (void)fprintf(stderr, "%s: %s: %s.\n", 1481 progname, curdir, strerror(errno)); 1482 exit(2); 1483 } 1484 1485 #ifndef NO_PWD_OVERRIDE 1486 HandlePWD(&sa); 1487 #endif 1488 Global_Set(".CURDIR", curdir); 1489 1490 InitObjdir(machine, machine_arch); 1491 1492 Arch_Init(); 1493 Suff_Init(); 1494 Trace_Init(tracefile); 1495 1496 defaultNode = NULL; 1497 (void)time(&now); 1498 1499 Trace_Log(MAKESTART, NULL); 1500 1501 InitVarTargets(); 1502 1503 InitDefSysIncPath(syspath); 1504 } 1505 1506 /* 1507 * Read the system makefile followed by either makefile, Makefile or the 1508 * files given by the -f option. Exit on parse errors. 1509 */ 1510 static void 1511 main_ReadFiles(void) 1512 { 1513 1514 if (Lst_IsEmpty(&sysIncPath->dirs)) 1515 SearchPath_AddAll(sysIncPath, defSysIncPath); 1516 1517 Dir_SetSYSPATH(); 1518 if (!opts.noBuiltins) 1519 ReadBuiltinRules(); 1520 1521 posix_state = PS_MAYBE_NEXT_LINE; 1522 if (!Lst_IsEmpty(&opts.makefiles)) 1523 ReadAllMakefiles(&opts.makefiles); 1524 else 1525 ReadFirstDefaultMakefile(); 1526 } 1527 1528 /* Compute the dependency graph. */ 1529 static void 1530 main_PrepareMaking(void) 1531 { 1532 /* In particular suppress .depend for '-r -V .OBJDIR -f /dev/null' */ 1533 if (!opts.noBuiltins || opts.printVars == PVM_NONE) { 1534 makeDependfile = Var_Subst("${.MAKE.DEPENDFILE}", 1535 SCOPE_CMDLINE, VARE_WANTRES); 1536 if (makeDependfile[0] != '\0') { 1537 /* TODO: handle errors */ 1538 doing_depend = true; 1539 (void)ReadMakefile(makeDependfile); 1540 doing_depend = false; 1541 } 1542 } 1543 1544 if (enterFlagObj) 1545 printf("%s: Entering directory `%s'\n", progname, objdir); 1546 1547 MakeMode(); 1548 1549 { 1550 FStr makeflags = Var_Value(SCOPE_GLOBAL, MAKEFLAGS); 1551 Global_Append("MFLAGS", makeflags.str); 1552 FStr_Done(&makeflags); 1553 } 1554 1555 InitMaxJobs(); 1556 1557 if (!opts.compatMake && !forceJobs) 1558 opts.compatMake = true; 1559 1560 if (!opts.compatMake) 1561 Job_ServerStart(maxJobTokens, jp_0, jp_1); 1562 DEBUG5(JOB, "job_pipe %d %d, maxjobs %d, tokens %d, compat %d\n", 1563 jp_0, jp_1, opts.maxJobs, maxJobTokens, opts.compatMake ? 1 : 0); 1564 1565 if (opts.printVars == PVM_NONE) 1566 Main_ExportMAKEFLAGS(true); /* initial export */ 1567 1568 InitVpath(); 1569 1570 /* 1571 * Now that all search paths have been read for suffixes et al, it's 1572 * time to add the default search path to their lists... 1573 */ 1574 Suff_ExtendPaths(); 1575 1576 /* 1577 * Propagate attributes through :: dependency lists. 1578 */ 1579 Targ_Propagate(); 1580 1581 /* print the initial graph, if the user requested it */ 1582 if (DEBUG(GRAPH1)) 1583 Targ_PrintGraph(1); 1584 } 1585 1586 /* 1587 * Make the targets. 1588 * If the -v or -V options are given, print variables instead. 1589 * Return whether any of the targets is out-of-date. 1590 */ 1591 static bool 1592 main_Run(void) 1593 { 1594 if (opts.printVars != PVM_NONE) { 1595 /* print the values of any variables requested by the user */ 1596 doPrintVars(); 1597 return false; 1598 } else { 1599 return runTargets(); 1600 } 1601 } 1602 1603 /* Clean up after making the targets. */ 1604 static void 1605 main_CleanUp(void) 1606 { 1607 #ifdef CLEANUP 1608 Lst_DoneCall(&opts.variables, free); 1609 Lst_DoneCall(&opts.makefiles, free); 1610 Lst_DoneCall(&opts.create, free); 1611 #endif 1612 1613 if (DEBUG(GRAPH2)) 1614 Targ_PrintGraph(2); 1615 1616 Trace_Log(MAKEEND, NULL); 1617 1618 if (enterFlagObj) 1619 printf("%s: Leaving directory `%s'\n", progname, objdir); 1620 if (opts.enterFlag) 1621 printf("%s: Leaving directory `%s'\n", progname, curdir); 1622 1623 #ifdef USE_META 1624 meta_finish(); 1625 #endif 1626 Suff_End(); 1627 Targ_End(); 1628 Arch_End(); 1629 Var_End(); 1630 Parse_End(); 1631 Dir_End(); 1632 Job_End(); 1633 Trace_End(); 1634 Str_Intern_End(); 1635 } 1636 1637 /* Determine the exit code. */ 1638 static int 1639 main_Exit(bool outOfDate) 1640 { 1641 if (opts.strict && (main_errors > 0 || Parse_NumErrors() > 0)) 1642 return 2; /* Not 1 so -q can distinguish error */ 1643 return outOfDate ? 1 : 0; 1644 } 1645 1646 int 1647 main(int argc, char **argv) 1648 { 1649 bool outOfDate; 1650 1651 main_Init(argc, argv); 1652 main_ReadFiles(); 1653 main_PrepareMaking(); 1654 outOfDate = main_Run(); 1655 main_CleanUp(); 1656 return main_Exit(outOfDate); 1657 } 1658 1659 /* 1660 * Open and parse the given makefile, with all its side effects. 1661 * Return false if the file could not be opened. 1662 */ 1663 static bool 1664 ReadMakefile(const char *fname) 1665 { 1666 int fd; 1667 char *name, *path = NULL; 1668 1669 if (strcmp(fname, "-") == 0) { 1670 Parse_File("(stdin)", -1); 1671 Var_Set(SCOPE_INTERNAL, "MAKEFILE", ""); 1672 } else { 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 /* 1723 * Execute the command in cmd, and return its output (only stdout, not 1724 * stderr, possibly empty). In the output, replace newlines with spaces. 1725 */ 1726 char * 1727 Cmd_Exec(const char *cmd, char **error) 1728 { 1729 const char *args[4]; /* Arguments for invoking the shell */ 1730 int pipefds[2]; 1731 int cpid; /* Child PID */ 1732 int pid; /* PID from wait() */ 1733 int status; /* command exit status */ 1734 Buffer buf; /* buffer to store the result */ 1735 ssize_t bytes_read; 1736 char *output; 1737 char *p; 1738 int saved_errno; 1739 char cmd_file[MAXPATHLEN]; 1740 size_t cmd_len; 1741 int cmd_fd = -1; 1742 1743 if (shellPath == NULL) 1744 Shell_Init(); 1745 1746 cmd_len = strlen(cmd); 1747 if (cmd_len > 1000) { 1748 cmd_fd = mkTempFile(NULL, cmd_file, sizeof(cmd_file)); 1749 if (cmd_fd >= 0) { 1750 ssize_t n; 1751 1752 n = write(cmd_fd, cmd, cmd_len); 1753 close(cmd_fd); 1754 if (n < (ssize_t)cmd_len) { 1755 unlink(cmd_file); 1756 cmd_fd = -1; 1757 } 1758 } 1759 } 1760 1761 args[0] = shellName; 1762 if (cmd_fd >= 0) { 1763 args[1] = cmd_file; 1764 args[2] = NULL; 1765 } else { 1766 cmd_file[0] = '\0'; 1767 args[1] = "-c"; 1768 args[2] = cmd; 1769 args[3] = NULL; 1770 } 1771 DEBUG1(VAR, "Capturing the output of command \"%s\"\n", cmd); 1772 1773 if (pipe(pipefds) == -1) { 1774 *error = str_concat3( 1775 "Couldn't create pipe for \"", cmd, "\""); 1776 return bmake_strdup(""); 1777 } 1778 1779 Var_ReexportVars(); 1780 1781 switch (cpid = vfork()) { 1782 case 0: 1783 (void)close(pipefds[0]); 1784 (void)dup2(pipefds[1], STDOUT_FILENO); 1785 (void)close(pipefds[1]); 1786 1787 (void)execv(shellPath, UNCONST(args)); 1788 _exit(1); 1789 /* NOTREACHED */ 1790 1791 case -1: 1792 *error = str_concat3("Couldn't exec \"", cmd, "\""); 1793 return bmake_strdup(""); 1794 } 1795 1796 (void)close(pipefds[1]); /* No need for the writing half */ 1797 1798 saved_errno = 0; 1799 Buf_Init(&buf); 1800 1801 do { 1802 char result[BUFSIZ]; 1803 bytes_read = read(pipefds[0], result, sizeof result); 1804 if (bytes_read > 0) 1805 Buf_AddBytes(&buf, result, (size_t)bytes_read); 1806 } while (bytes_read > 0 || (bytes_read == -1 && errno == EINTR)); 1807 if (bytes_read == -1) 1808 saved_errno = errno; 1809 1810 (void)close(pipefds[0]); /* Close the input side of the pipe. */ 1811 1812 while ((pid = waitpid(cpid, &status, 0)) != cpid && pid >= 0) 1813 JobReapChild(pid, status, false); 1814 1815 if (Buf_EndsWith(&buf, '\n')) 1816 buf.data[buf.len - 1] = '\0'; 1817 1818 output = Buf_DoneData(&buf); 1819 for (p = output; *p != '\0'; p++) 1820 if (*p == '\n') 1821 *p = ' '; 1822 1823 if (WIFSIGNALED(status)) 1824 *error = str_concat3("\"", cmd, "\" exited on a signal"); 1825 else if (WEXITSTATUS(status) != 0) 1826 *error = str_concat3( 1827 "\"", cmd, "\" returned non-zero status"); 1828 else if (saved_errno != 0) 1829 *error = str_concat3( 1830 "Couldn't read shell's output for \"", cmd, "\""); 1831 else 1832 *error = NULL; 1833 if (cmd_file[0] != '\0') 1834 unlink(cmd_file); 1835 return output; 1836 } 1837 1838 /* 1839 * Print a printf-style error message. 1840 * 1841 * In default mode, this error message has no consequences, for compatibility 1842 * reasons, in particular it does not affect the exit status. Only in lint 1843 * mode (-dL) it does. 1844 */ 1845 void 1846 Error(const char *fmt, ...) 1847 { 1848 va_list ap; 1849 FILE *f; 1850 1851 f = opts.debug_file; 1852 if (f == stdout) 1853 f = stderr; 1854 (void)fflush(stdout); 1855 1856 for (;;) { 1857 fprintf(f, "%s: ", progname); 1858 va_start(ap, fmt); 1859 (void)vfprintf(f, fmt, ap); 1860 va_end(ap); 1861 (void)fprintf(f, "\n"); 1862 (void)fflush(f); 1863 if (f == stderr) 1864 break; 1865 f = stderr; 1866 } 1867 main_errors++; 1868 } 1869 1870 /* 1871 * Wait for any running jobs to finish, then produce an error message, 1872 * finally exit immediately. 1873 * 1874 * Exiting immediately differs from Parse_Error, which exits only after the 1875 * current top-level makefile has been parsed completely. 1876 */ 1877 void 1878 Fatal(const char *fmt, ...) 1879 { 1880 va_list ap; 1881 1882 if (jobsRunning) 1883 Job_Wait(); 1884 1885 (void)fflush(stdout); 1886 fprintf(stderr, "%s: ", progname); 1887 va_start(ap, fmt); 1888 (void)vfprintf(stderr, fmt, ap); 1889 va_end(ap); 1890 (void)fprintf(stderr, "\n"); 1891 (void)fflush(stderr); 1892 PrintStackTrace(true); 1893 1894 PrintOnError(NULL, "\n"); 1895 1896 if (DEBUG(GRAPH2) || DEBUG(GRAPH3)) 1897 Targ_PrintGraph(2); 1898 Trace_Log(MAKEERROR, NULL); 1899 exit(2); /* Not 1 so -q can distinguish error */ 1900 } 1901 1902 /* 1903 * Major exception once jobs are being created. 1904 * Kills all jobs, prints a message and exits. 1905 */ 1906 void 1907 Punt(const char *fmt, ...) 1908 { 1909 va_list ap; 1910 1911 (void)fflush(stdout); 1912 (void)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 1919 PrintOnError(NULL, "\n"); 1920 1921 DieHorribly(); 1922 } 1923 1924 /* Exit without giving a message. */ 1925 void 1926 DieHorribly(void) 1927 { 1928 if (jobsRunning) 1929 Job_AbortAll(); 1930 if (DEBUG(GRAPH2)) 1931 Targ_PrintGraph(2); 1932 Trace_Log(MAKEERROR, NULL); 1933 exit(2); /* Not 1 so -q can distinguish error */ 1934 } 1935 1936 /* 1937 * Called when aborting due to errors in child shell to signal abnormal exit. 1938 * The program exits. 1939 * Errors is the number of errors encountered in Make_Make. 1940 */ 1941 void 1942 Finish(int errs) 1943 { 1944 if (shouldDieQuietly(NULL, -1)) 1945 exit(2); 1946 Fatal("%d error%s", errs, errs == 1 ? "" : "s"); 1947 } 1948 1949 int 1950 unlink_file(const char *file) 1951 { 1952 struct stat st; 1953 1954 if (lstat(file, &st) == -1) 1955 return -1; 1956 1957 if (S_ISDIR(st.st_mode)) { 1958 /* 1959 * POSIX says for unlink: "The path argument shall not name 1960 * a directory unless [...]". 1961 */ 1962 errno = EISDIR; 1963 return -1; 1964 } 1965 return unlink(file); 1966 } 1967 1968 static void 1969 write_all(int fd, const void *data, size_t n) 1970 { 1971 const char *mem = data; 1972 1973 while (n > 0) { 1974 ssize_t written = write(fd, mem, n); 1975 /* XXX: Should this EAGAIN be EINTR? */ 1976 if (written == -1 && errno == EAGAIN) 1977 continue; 1978 if (written == -1) 1979 break; 1980 mem += written; 1981 n -= (size_t)written; 1982 } 1983 } 1984 1985 /* Print why exec failed, avoiding stdio. */ 1986 void MAKE_ATTR_DEAD 1987 execDie(const char *af, const char *av) 1988 { 1989 Buffer buf; 1990 1991 Buf_Init(&buf); 1992 Buf_AddStr(&buf, progname); 1993 Buf_AddStr(&buf, ": "); 1994 Buf_AddStr(&buf, af); 1995 Buf_AddStr(&buf, "("); 1996 Buf_AddStr(&buf, av); 1997 Buf_AddStr(&buf, ") failed ("); 1998 Buf_AddStr(&buf, strerror(errno)); 1999 Buf_AddStr(&buf, ")\n"); 2000 2001 write_all(STDERR_FILENO, buf.data, buf.len); 2002 2003 Buf_Done(&buf); 2004 _exit(1); 2005 } 2006 2007 static void 2008 purge_relative_cached_realpaths(void) 2009 { 2010 HashEntry *he, *next; 2011 HashIter hi; 2012 2013 HashIter_Init(&hi, &cached_realpaths); 2014 he = HashIter_Next(&hi); 2015 while (he != NULL) { 2016 next = HashIter_Next(&hi); 2017 if (he->key[0] != '/') { 2018 DEBUG1(DIR, "cached_realpath: purging %s\n", he->key); 2019 HashTable_DeleteEntry(&cached_realpaths, he); 2020 /* 2021 * XXX: What about the allocated he->value? Either 2022 * free them or document why they cannot be freed. 2023 */ 2024 } 2025 he = next; 2026 } 2027 } 2028 2029 const char * 2030 cached_realpath(const char *pathname, char *resolved) 2031 { 2032 const char *rp; 2033 2034 if (pathname == NULL || pathname[0] == '\0') 2035 return NULL; 2036 2037 rp = HashTable_FindValue(&cached_realpaths, pathname); 2038 if (rp != NULL) { 2039 /* a hit */ 2040 strncpy(resolved, rp, MAXPATHLEN); 2041 resolved[MAXPATHLEN - 1] = '\0'; 2042 return resolved; 2043 } 2044 2045 rp = realpath(pathname, resolved); 2046 if (rp != NULL) { 2047 HashTable_Set(&cached_realpaths, pathname, bmake_strdup(rp)); 2048 DEBUG2(DIR, "cached_realpath: %s -> %s\n", pathname, rp); 2049 return resolved; 2050 } 2051 2052 /* should we negative-cache? */ 2053 return NULL; 2054 } 2055 2056 /* 2057 * Return true if we should die without noise. 2058 * For example our failing child was a sub-make or failure happened elsewhere. 2059 */ 2060 bool 2061 shouldDieQuietly(GNode *gn, int bf) 2062 { 2063 static int quietly = -1; 2064 2065 if (quietly < 0) { 2066 if (DEBUG(JOB) || 2067 !GetBooleanExpr("${.MAKE.DIE_QUIETLY}", true)) 2068 quietly = 0; 2069 else if (bf >= 0) 2070 quietly = bf; 2071 else 2072 quietly = (gn != NULL && (gn->type & OP_MAKE)) ? 1 : 0; 2073 } 2074 return quietly != 0; 2075 } 2076 2077 static void 2078 SetErrorVars(GNode *gn) 2079 { 2080 StringListNode *ln; 2081 2082 /* 2083 * We can print this even if there is no .ERROR target. 2084 */ 2085 Global_Set(".ERROR_TARGET", gn->name); 2086 Global_Delete(".ERROR_CMD"); 2087 2088 for (ln = gn->commands.first; ln != NULL; ln = ln->next) { 2089 const char *cmd = ln->datum; 2090 2091 if (cmd == NULL) 2092 break; 2093 Global_Append(".ERROR_CMD", cmd); 2094 } 2095 } 2096 2097 /* 2098 * Print some helpful information in case of an error. 2099 * The caller should exit soon after calling this function. 2100 */ 2101 void 2102 PrintOnError(GNode *gn, const char *msg) 2103 { 2104 static GNode *errorNode = NULL; 2105 2106 if (DEBUG(HASH)) { 2107 Targ_Stats(); 2108 Var_Stats(); 2109 } 2110 2111 if (errorNode != NULL) 2112 return; /* we've been here! */ 2113 2114 printf("%s%s: stopped in %s\n", msg, progname, curdir); 2115 2116 /* we generally want to keep quiet if a sub-make died */ 2117 if (shouldDieQuietly(gn, -1)) 2118 return; 2119 2120 if (gn != NULL) 2121 SetErrorVars(gn); 2122 2123 { 2124 char *errorVarsValues = Var_Subst( 2125 "${MAKE_PRINT_VAR_ON_ERROR:@v@$v='${$v}'\n@}", 2126 SCOPE_GLOBAL, VARE_WANTRES); 2127 /* TODO: handle errors */ 2128 printf("%s", errorVarsValues); 2129 free(errorVarsValues); 2130 } 2131 2132 fflush(stdout); 2133 2134 /* 2135 * Finally, see if there is a .ERROR target, and run it if so. 2136 */ 2137 errorNode = Targ_FindNode(".ERROR"); 2138 if (errorNode != NULL) { 2139 errorNode->type |= OP_SPECIAL; 2140 Compat_Make(errorNode, errorNode); 2141 } 2142 } 2143 2144 void 2145 Main_ExportMAKEFLAGS(bool first) 2146 { 2147 static bool once = true; 2148 char *flags; 2149 2150 if (once != first) 2151 return; 2152 once = false; 2153 2154 flags = Var_Subst( 2155 "${.MAKEFLAGS} ${.MAKEOVERRIDES:O:u:@v@$v=${$v:Q}@}", 2156 SCOPE_CMDLINE, VARE_WANTRES); 2157 /* TODO: handle errors */ 2158 if (flags[0] != '\0') { 2159 #ifdef POSIX 2160 setenv("MAKEFLAGS", flags, 1); 2161 #else 2162 setenv("MAKE", flags, 1); 2163 #endif 2164 } 2165 } 2166 2167 char * 2168 getTmpdir(void) 2169 { 2170 static char *tmpdir = NULL; 2171 struct stat st; 2172 2173 if (tmpdir != NULL) 2174 return tmpdir; 2175 2176 /* Honor $TMPDIR if it is valid, strip a trailing '/'. */ 2177 tmpdir = Var_Subst("${TMPDIR:tA:U" _PATH_TMP ":S,/$,,W}/", 2178 SCOPE_GLOBAL, VARE_WANTRES); 2179 /* TODO: handle errors */ 2180 2181 if (stat(tmpdir, &st) < 0 || !S_ISDIR(st.st_mode)) { 2182 free(tmpdir); 2183 tmpdir = bmake_strdup(_PATH_TMP); 2184 } 2185 return tmpdir; 2186 } 2187 2188 /* 2189 * Create and open a temp file using "pattern". 2190 * If tfile is provided, set it to a copy of the filename created. 2191 * Otherwise unlink the file once open. 2192 */ 2193 int 2194 mkTempFile(const char *pattern, char *tfile, size_t tfile_sz) 2195 { 2196 static char *tmpdir = NULL; 2197 char tbuf[MAXPATHLEN]; 2198 int fd; 2199 2200 if (pattern == NULL) 2201 pattern = TMPPAT; 2202 if (tmpdir == NULL) 2203 tmpdir = getTmpdir(); 2204 if (tfile == NULL) { 2205 tfile = tbuf; 2206 tfile_sz = sizeof tbuf; 2207 } 2208 2209 if (pattern[0] == '/') 2210 snprintf(tfile, tfile_sz, "%s", pattern); 2211 else 2212 snprintf(tfile, tfile_sz, "%s%s", tmpdir, pattern); 2213 2214 if ((fd = mkstemp(tfile)) < 0) 2215 Punt("Could not create temporary file %s: %s", tfile, 2216 strerror(errno)); 2217 if (tfile == tbuf) 2218 unlink(tfile); /* we just want the descriptor */ 2219 2220 return fd; 2221 } 2222 2223 /* 2224 * Convert a string representation of a boolean into a boolean value. 2225 * Anything that looks like "No", "False", "Off", "0" etc. is false, 2226 * the empty string is the fallback, everything else is true. 2227 */ 2228 bool 2229 ParseBoolean(const char *s, bool fallback) 2230 { 2231 char ch = ch_tolower(s[0]); 2232 if (ch == '\0') 2233 return fallback; 2234 if (ch == '0' || ch == 'f' || ch == 'n') 2235 return false; 2236 if (ch == 'o') 2237 return ch_tolower(s[1]) != 'f'; 2238 return true; 2239 } 2240