1 /* $NetBSD: main.c,v 1.624 2024/06/02 15:31:26 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 #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 1.624 2024/06/02 15:31:26 rillig Exp $"); 115 #if defined(MAKE_NATIVE) 116 __COPYRIGHT("@(#) Copyright (c) 1988, 1989, 1990, 1993 " 117 "The Regents of the University of California. " 118 "All rights reserved."); 119 #endif 120 121 #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 snprintf(curdir, MAXPATHLEN, "%s", argvalue); 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 { 702 FStr argv0 = Var_Value(SCOPE_GLOBAL, ".MAKE"); 703 buf = str_concat3(argv0.str, " ", p); 704 FStr_Done(&argv0); 705 } 706 707 words = Str_Words(buf, true); 708 if (words.words == NULL) { 709 Error("Unterminated quoted string [%s]", buf); 710 free(buf); 711 return; 712 } 713 free(buf); 714 MainParseArgs((int)words.len, words.words); 715 716 Words_Free(words); 717 } 718 719 bool 720 Main_SetObjdir(bool writable, const char *fmt, ...) 721 { 722 struct stat sb; 723 char *path; 724 char buf[MAXPATHLEN + 1]; 725 char buf2[MAXPATHLEN + 1]; 726 va_list ap; 727 728 va_start(ap, fmt); 729 vsnprintf(path = buf, MAXPATHLEN, fmt, ap); 730 va_end(ap); 731 732 if (path[0] != '/') { 733 if (snprintf(buf2, MAXPATHLEN, "%s/%s", curdir, path) <= MAXPATHLEN) 734 path = buf2; 735 else 736 return false; 737 } 738 739 /* look for the directory and try to chdir there */ 740 if (stat(path, &sb) != 0 || !S_ISDIR(sb.st_mode)) 741 return false; 742 743 if ((writable && access(path, W_OK) != 0) || chdir(path) != 0) { 744 (void)fprintf(stderr, "%s: warning: %s: %s.\n", 745 progname, path, strerror(errno)); 746 /* Allow debugging how we got here - not always obvious */ 747 if (GetBooleanExpr("${MAKE_DEBUG_OBJDIR_CHECK_WRITABLE}", 748 false)) 749 PrintOnError(NULL, ""); 750 return false; 751 } 752 753 snprintf(objdir, sizeof objdir, "%s", path); 754 Global_Set(".OBJDIR", objdir); 755 setenv("PWD", objdir, 1); 756 Dir_InitDot(); 757 purge_relative_cached_realpaths(); 758 if (opts.enterFlag && strcmp(objdir, curdir) != 0) 759 enterFlagObj = true; 760 return true; 761 } 762 763 static bool 764 SetVarObjdir(bool writable, const char *var, const char *suffix) 765 { 766 FStr path = Var_Value(SCOPE_CMDLINE, var); 767 768 if (path.str == NULL || path.str[0] == '\0') { 769 FStr_Done(&path); 770 return false; 771 } 772 773 Var_Expand(&path, SCOPE_GLOBAL, VARE_EVAL); 774 775 (void)Main_SetObjdir(writable, "%s%s", path.str, suffix); 776 777 FStr_Done(&path); 778 return true; 779 } 780 781 /* 782 * Splits str into words (in-place, modifying it), adding them to the list. 783 * The string must be kept alive as long as the list. 784 */ 785 void 786 AppendWords(StringList *lp, char *str) 787 { 788 char *p; 789 const char *sep = " \t"; 790 791 for (p = strtok(str, sep); p != NULL; p = strtok(NULL, sep)) 792 Lst_Append(lp, p); 793 } 794 795 #ifdef SIGINFO 796 /*ARGSUSED*/ 797 static void 798 siginfo(int signo MAKE_ATTR_UNUSED) 799 { 800 char dir[MAXPATHLEN]; 801 char str[2 * MAXPATHLEN]; 802 int len; 803 if (getcwd(dir, sizeof dir) == NULL) 804 return; 805 len = snprintf(str, sizeof str, "%s: Working in: %s\n", progname, dir); 806 if (len > 0) 807 (void)write(STDERR_FILENO, str, (size_t)len); 808 } 809 #endif 810 811 /* Allow makefiles some control over the mode we run in. */ 812 static void 813 MakeMode(void) 814 { 815 char *mode = Var_Subst("${.MAKE.MODE:tl}", SCOPE_GLOBAL, VARE_EVAL); 816 /* TODO: handle errors */ 817 818 if (mode[0] != '\0') { 819 if (strstr(mode, "compat") != NULL) { 820 opts.compatMake = true; 821 forceJobs = false; 822 } 823 #if USE_META 824 if (strstr(mode, "meta") != NULL) 825 meta_mode_init(mode); 826 #endif 827 if (strstr(mode, "randomize-targets") != NULL) 828 opts.randomizeTargets = true; 829 } 830 831 free(mode); 832 } 833 834 static void 835 PrintVar(const char *varname, bool expandVars) 836 { 837 if (strchr(varname, '$') != NULL) { 838 char *evalue = Var_Subst(varname, SCOPE_GLOBAL, VARE_EVAL); 839 /* TODO: handle errors */ 840 printf("%s\n", evalue); 841 free(evalue); 842 843 } else if (expandVars) { 844 char *expr = str_concat3("${", varname, "}"); 845 char *evalue = Var_Subst(expr, SCOPE_GLOBAL, VARE_EVAL); 846 /* TODO: handle errors */ 847 free(expr); 848 printf("%s\n", evalue); 849 free(evalue); 850 851 } else { 852 FStr value = Var_Value(SCOPE_GLOBAL, varname); 853 printf("%s\n", value.str != NULL ? value.str : ""); 854 FStr_Done(&value); 855 } 856 } 857 858 /* 859 * Return a bool based on a variable. 860 * 861 * If the knob is not set, return the fallback. 862 * If set, anything that looks or smells like "No", "False", "Off", "0", etc. 863 * is false, otherwise true. 864 */ 865 bool 866 GetBooleanExpr(const char *expr, bool fallback) 867 { 868 char *value; 869 bool res; 870 871 value = Var_Subst(expr, SCOPE_GLOBAL, VARE_EVAL); 872 /* TODO: handle errors */ 873 res = ParseBoolean(value, fallback); 874 free(value); 875 return res; 876 } 877 878 static void 879 doPrintVars(void) 880 { 881 StringListNode *ln; 882 bool expandVars; 883 884 if (opts.printVars == PVM_EXPANDED) 885 expandVars = true; 886 else if (opts.debugVflag) 887 expandVars = false; 888 else 889 expandVars = GetBooleanExpr("${.MAKE.EXPAND_VARIABLES}", 890 false); 891 892 for (ln = opts.variables.first; ln != NULL; ln = ln->next) { 893 const char *varname = ln->datum; 894 PrintVar(varname, expandVars); 895 } 896 } 897 898 static bool 899 runTargets(void) 900 { 901 GNodeList targs = LST_INIT; /* target nodes to create */ 902 bool outOfDate; /* false if all targets up to date */ 903 904 /* 905 * Have now read the entire graph and need to make a list of 906 * targets to create. If none was given on the command line, 907 * we consult the parsing module to find the main target(s) 908 * to create. 909 */ 910 if (Lst_IsEmpty(&opts.create)) 911 Parse_MainName(&targs); 912 else 913 Targ_FindList(&targs, &opts.create); 914 915 if (!opts.compatMake) { 916 /* 917 * Initialize job module before traversing the graph 918 * now that any .BEGIN and .END targets have been read. 919 * This is done only if the -q flag wasn't given 920 * (to prevent the .BEGIN from being executed should 921 * it exist). 922 */ 923 if (!opts.query) { 924 Job_Init(); 925 jobsRunning = true; 926 } 927 928 /* Traverse the graph, checking on all the targets */ 929 outOfDate = Make_Run(&targs); 930 } else { 931 Compat_MakeAll(&targs); 932 outOfDate = false; 933 } 934 Lst_Done(&targs); /* Don't free the targets themselves. */ 935 return outOfDate; 936 } 937 938 /* 939 * Set up the .TARGETS variable to contain the list of targets to be created. 940 * If none specified, make the variable empty for now, the parser will fill 941 * in the default or .MAIN target later. 942 */ 943 static void 944 InitVarTargets(void) 945 { 946 StringListNode *ln; 947 948 if (Lst_IsEmpty(&opts.create)) { 949 Global_Set(".TARGETS", ""); 950 return; 951 } 952 953 for (ln = opts.create.first; ln != NULL; ln = ln->next) { 954 const char *name = ln->datum; 955 Global_Append(".TARGETS", name); 956 } 957 } 958 959 static void 960 InitRandom(void) 961 { 962 struct timeval tv; 963 964 gettimeofday(&tv, NULL); 965 srandom((unsigned int)(tv.tv_sec + tv.tv_usec)); 966 } 967 968 static const char * 969 InitVarMachine(const struct utsname *utsname MAKE_ATTR_UNUSED) 970 { 971 #ifdef FORCE_MACHINE 972 return FORCE_MACHINE; 973 #else 974 const char *machine = getenv("MACHINE"); 975 976 if (machine != NULL) 977 return machine; 978 979 #if defined(MAKE_NATIVE) 980 return utsname->machine; 981 #elif defined(MAKE_MACHINE) 982 return MAKE_MACHINE; 983 #else 984 return "unknown"; 985 #endif 986 #endif 987 } 988 989 static const char * 990 InitVarMachineArch(void) 991 { 992 #ifdef FORCE_MACHINE_ARCH 993 return FORCE_MACHINE_ARCH; 994 #else 995 const char *env = getenv("MACHINE_ARCH"); 996 if (env != NULL) 997 return env; 998 999 #if defined(MAKE_NATIVE) && defined(CTL_HW) 1000 { 1001 struct utsname utsname; 1002 static char machine_arch_buf[sizeof utsname.machine]; 1003 const int mib[2] = { CTL_HW, HW_MACHINE_ARCH }; 1004 size_t len = sizeof machine_arch_buf; 1005 1006 if (sysctl(mib, (unsigned int)__arraycount(mib), 1007 machine_arch_buf, &len, NULL, 0) < 0) { 1008 (void)fprintf(stderr, "%s: sysctl failed (%s).\n", 1009 progname, strerror(errno)); 1010 exit(2); 1011 } 1012 1013 return machine_arch_buf; 1014 } 1015 #elif defined(MACHINE_ARCH) 1016 return MACHINE_ARCH; 1017 #elif defined(MAKE_MACHINE_ARCH) 1018 return MAKE_MACHINE_ARCH; 1019 #else 1020 return "unknown"; 1021 #endif 1022 #endif 1023 } 1024 1025 #ifndef NO_PWD_OVERRIDE 1026 /* 1027 * Overriding getcwd() with $PWD totally breaks MAKEOBJDIRPREFIX 1028 * since the value of curdir can vary depending on how we got 1029 * here. That is, sitting at a shell prompt (shell that provides $PWD) 1030 * or via subdir.mk, in which case it's likely a shell which does 1031 * not provide it. 1032 * 1033 * So, to stop it breaking this case only, we ignore PWD if 1034 * MAKEOBJDIRPREFIX is set or MAKEOBJDIR contains an expression. 1035 */ 1036 static void 1037 HandlePWD(const struct stat *curdir_st) 1038 { 1039 char *pwd; 1040 FStr makeobjdir; 1041 struct stat pwd_st; 1042 1043 if (ignorePWD || (pwd = getenv("PWD")) == NULL) 1044 return; 1045 1046 if (Var_Exists(SCOPE_CMDLINE, "MAKEOBJDIRPREFIX")) 1047 return; 1048 1049 makeobjdir = Var_Value(SCOPE_CMDLINE, "MAKEOBJDIR"); 1050 if (makeobjdir.str != NULL && strchr(makeobjdir.str, '$') != NULL) 1051 goto ignore_pwd; 1052 1053 if (stat(pwd, &pwd_st) == 0 && 1054 curdir_st->st_ino == pwd_st.st_ino && 1055 curdir_st->st_dev == pwd_st.st_dev) 1056 snprintf(curdir, MAXPATHLEN, "%s", pwd); 1057 1058 ignore_pwd: 1059 FStr_Done(&makeobjdir); 1060 } 1061 #endif 1062 1063 /* 1064 * Find the .OBJDIR. If MAKEOBJDIRPREFIX, or failing that, MAKEOBJDIR is set 1065 * in the environment, try only that value and fall back to .CURDIR if it 1066 * does not exist. 1067 * 1068 * Otherwise, try _PATH_OBJDIR.MACHINE-MACHINE_ARCH, _PATH_OBJDIR.MACHINE, 1069 * and finally _PATH_OBJDIRPREFIX`pwd`, in that order. If none of these 1070 * paths exist, just use .CURDIR. 1071 */ 1072 static void 1073 InitObjdir(const char *machine, const char *machine_arch) 1074 { 1075 bool writable; 1076 1077 Dir_InitCur(curdir); 1078 writable = GetBooleanExpr("${MAKE_OBJDIR_CHECK_WRITABLE}", true); 1079 (void)Main_SetObjdir(false, "%s", curdir); 1080 1081 if (!SetVarObjdir(writable, "MAKEOBJDIRPREFIX", curdir) && 1082 !SetVarObjdir(writable, "MAKEOBJDIR", "") && 1083 !Main_SetObjdir(writable, "%s.%s-%s", _PATH_OBJDIR, machine, machine_arch) && 1084 !Main_SetObjdir(writable, "%s.%s", _PATH_OBJDIR, machine) && 1085 !Main_SetObjdir(writable, "%s", _PATH_OBJDIR)) 1086 (void)Main_SetObjdir(writable, "%s%s", _PATH_OBJDIRPREFIX, curdir); 1087 } 1088 1089 /* get rid of resource limit on file descriptors */ 1090 static void 1091 UnlimitFiles(void) 1092 { 1093 #if defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE) 1094 struct rlimit rl; 1095 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 && 1096 rl.rlim_cur != rl.rlim_max) { 1097 #ifdef BMAKE_NOFILE_MAX 1098 if (BMAKE_NOFILE_MAX < rl.rlim_max) 1099 rl.rlim_cur = BMAKE_NOFILE_MAX; 1100 else 1101 #endif 1102 rl.rlim_cur = rl.rlim_max; 1103 (void)setrlimit(RLIMIT_NOFILE, &rl); 1104 } 1105 #endif 1106 } 1107 1108 static void 1109 CmdOpts_Init(void) 1110 { 1111 opts.compatMake = false; 1112 memset(&opts.debug, 0, sizeof(opts.debug)); 1113 /* opts.debug_file has already been initialized earlier */ 1114 opts.strict = false; 1115 opts.debugVflag = false; 1116 opts.checkEnvFirst = false; 1117 Lst_Init(&opts.makefiles); 1118 opts.ignoreErrors = false; /* Pay attention to non-zero returns */ 1119 opts.maxJobs = 1; 1120 opts.keepgoing = false; /* Stop on error */ 1121 opts.noRecursiveExecute = false; /* Execute all .MAKE targets */ 1122 opts.noExecute = false; /* Execute all commands */ 1123 opts.query = false; 1124 opts.noBuiltins = false; /* Read the built-in rules */ 1125 opts.silent = false; /* Print commands as executed */ 1126 opts.touch = false; 1127 opts.printVars = PVM_NONE; 1128 Lst_Init(&opts.variables); 1129 opts.parseWarnFatal = false; 1130 opts.enterFlag = false; 1131 opts.varNoExportEnv = false; 1132 Lst_Init(&opts.create); 1133 } 1134 1135 /* 1136 * Initialize MAKE and .MAKE to the path of the executable, so that it can be 1137 * found by execvp(3) and the shells, even after a chdir. 1138 * 1139 * If it's a relative path and contains a '/', resolve it to an absolute path. 1140 * Otherwise keep it as is, assuming it will be found in the PATH. 1141 */ 1142 static void 1143 InitVarMake(const char *argv0) 1144 { 1145 const char *make = argv0; 1146 char pathbuf[MAXPATHLEN]; 1147 1148 if (argv0[0] != '/' && strchr(argv0, '/') != NULL) { 1149 const char *abspath = cached_realpath(argv0, pathbuf); 1150 struct stat st; 1151 if (abspath != NULL && abspath[0] == '/' && 1152 stat(make, &st) == 0) 1153 make = abspath; 1154 } 1155 1156 Global_Set("MAKE", make); 1157 Global_Set(".MAKE", make); 1158 } 1159 1160 /* 1161 * Add the directories from the colon-separated syspath to defSysIncPath. 1162 * After returning, the contents of syspath is unspecified. 1163 */ 1164 static void 1165 InitDefSysIncPath(char *syspath) 1166 { 1167 static char defsyspath[] = _PATH_DEFSYSPATH; 1168 char *start, *p; 1169 1170 /* 1171 * If no user-supplied system path was given (through the -m option) 1172 * add the directories from the DEFSYSPATH (more than one may be given 1173 * as dir1:...:dirn) to the system include path. 1174 */ 1175 if (syspath == NULL || syspath[0] == '\0') 1176 syspath = defsyspath; 1177 else 1178 syspath = bmake_strdup(syspath); 1179 1180 for (start = syspath; *start != '\0'; start = p) { 1181 for (p = start; *p != '\0' && *p != ':'; p++) 1182 continue; 1183 if (*p == ':') 1184 *p++ = '\0'; 1185 1186 /* look for magic parent directory search string */ 1187 if (strncmp(start, ".../", 4) == 0) { 1188 char *dir = Dir_FindHereOrAbove(curdir, start + 4); 1189 if (dir != NULL) { 1190 (void)SearchPath_Add(defSysIncPath, dir); 1191 free(dir); 1192 } 1193 } else { 1194 (void)SearchPath_Add(defSysIncPath, start); 1195 } 1196 } 1197 1198 if (syspath != defsyspath) 1199 free(syspath); 1200 } 1201 1202 static void 1203 ReadBuiltinRules(void) 1204 { 1205 StringListNode *ln; 1206 StringList sysMkFiles = LST_INIT; 1207 1208 SearchPath_Expand( 1209 Lst_IsEmpty(&sysIncPath->dirs) ? defSysIncPath : sysIncPath, 1210 _PATH_DEFSYSMK, 1211 &sysMkFiles); 1212 if (Lst_IsEmpty(&sysMkFiles)) 1213 Fatal("%s: no system rules (%s).", progname, _PATH_DEFSYSMK); 1214 1215 for (ln = sysMkFiles.first; ln != NULL; ln = ln->next) 1216 if (ReadMakefile(ln->datum)) 1217 break; 1218 1219 if (ln == NULL) 1220 Fatal("%s: cannot open %s.", 1221 progname, (const char *)sysMkFiles.first->datum); 1222 1223 Lst_DoneFree(&sysMkFiles); 1224 } 1225 1226 static void 1227 InitMaxJobs(void) 1228 { 1229 char *value; 1230 int n; 1231 1232 if (forceJobs || opts.compatMake || 1233 !Var_Exists(SCOPE_GLOBAL, ".MAKE.JOBS")) 1234 return; 1235 1236 value = Var_Subst("${.MAKE.JOBS}", SCOPE_GLOBAL, VARE_EVAL); 1237 /* TODO: handle errors */ 1238 n = (int)strtol(value, NULL, 0); 1239 if (n < 1) { 1240 (void)fprintf(stderr, 1241 "%s: illegal value for .MAKE.JOBS " 1242 "-- must be positive integer!\n", 1243 progname); 1244 exit(2); /* Not 1 so -q can distinguish error */ 1245 } 1246 1247 if (n != opts.maxJobs) { 1248 Global_Append(MAKEFLAGS, "-j"); 1249 Global_Append(MAKEFLAGS, value); 1250 } 1251 1252 opts.maxJobs = n; 1253 maxJobTokens = opts.maxJobs; 1254 forceJobs = true; 1255 free(value); 1256 } 1257 1258 /* 1259 * For compatibility, look at the directories in the VPATH variable 1260 * and add them to the search path, if the variable is defined. The 1261 * variable's value is in the same format as the PATH environment 1262 * variable, i.e. <directory>:<directory>:<directory>... 1263 */ 1264 static void 1265 InitVpath(void) 1266 { 1267 char *vpath, savec, *path; 1268 if (!Var_Exists(SCOPE_CMDLINE, "VPATH")) 1269 return; 1270 1271 vpath = Var_Subst("${VPATH}", SCOPE_CMDLINE, VARE_EVAL); 1272 /* TODO: handle errors */ 1273 path = vpath; 1274 do { 1275 char *p; 1276 /* skip to end of directory */ 1277 for (p = path; *p != ':' && *p != '\0'; p++) 1278 continue; 1279 /* Save terminator character so know when to stop */ 1280 savec = *p; 1281 *p = '\0'; 1282 /* Add directory to search path */ 1283 (void)SearchPath_Add(&dirSearchPath, path); 1284 *p = savec; 1285 path = p + 1; 1286 } while (savec == ':'); 1287 free(vpath); 1288 } 1289 1290 static void 1291 ReadAllMakefiles(const StringList *makefiles) 1292 { 1293 StringListNode *ln; 1294 1295 for (ln = makefiles->first; ln != NULL; ln = ln->next) { 1296 const char *fname = ln->datum; 1297 if (!ReadMakefile(fname)) 1298 Fatal("%s: cannot open %s.", progname, fname); 1299 } 1300 } 1301 1302 static void 1303 ReadFirstDefaultMakefile(void) 1304 { 1305 StringList makefiles = LST_INIT; 1306 StringListNode *ln; 1307 char *prefs = Var_Subst("${.MAKE.MAKEFILE_PREFERENCE}", 1308 SCOPE_CMDLINE, VARE_EVAL); 1309 /* TODO: handle errors */ 1310 1311 AppendWords(&makefiles, prefs); 1312 1313 for (ln = makefiles.first; ln != NULL; ln = ln->next) 1314 if (ReadMakefile(ln->datum)) 1315 break; 1316 1317 Lst_Done(&makefiles); 1318 free(prefs); 1319 } 1320 1321 /* 1322 * Initialize variables such as MAKE, MACHINE, .MAKEFLAGS. 1323 * Initialize a few modules. 1324 * Parse the arguments from MAKEFLAGS and the command line. 1325 */ 1326 static void 1327 main_Init(int argc, char **argv) 1328 { 1329 struct stat sa; 1330 const char *machine; 1331 const char *machine_arch; 1332 char *syspath = getenv("MAKESYSPATH"); 1333 struct utsname utsname; 1334 1335 /* default to writing debug to stderr */ 1336 opts.debug_file = stderr; 1337 1338 Str_Intern_Init(); 1339 HashTable_Init(&cached_realpaths); 1340 1341 #ifdef SIGINFO 1342 (void)bmake_signal(SIGINFO, siginfo); 1343 #endif 1344 1345 InitRandom(); 1346 1347 progname = str_basename(argv[0]); 1348 1349 UnlimitFiles(); 1350 1351 if (uname(&utsname) == -1) { 1352 (void)fprintf(stderr, "%s: uname failed (%s).\n", progname, 1353 strerror(errno)); 1354 exit(2); 1355 } 1356 1357 machine = InitVarMachine(&utsname); 1358 machine_arch = InitVarMachineArch(); 1359 1360 myPid = getpid(); /* remember this for vFork() */ 1361 1362 /* Just in case MAKEOBJDIR wants us to do something tricky. */ 1363 Targ_Init(); 1364 Var_Init(); 1365 #ifdef FORCE_MAKE_OS 1366 Global_Set_ReadOnly(".MAKE.OS", FORCE_MAKE_OS); 1367 #else 1368 Global_Set_ReadOnly(".MAKE.OS", utsname.sysname); 1369 #endif 1370 Global_Set("MACHINE", machine); 1371 Global_Set("MACHINE_ARCH", machine_arch); 1372 #ifdef MAKE_VERSION 1373 Global_Set("MAKE_VERSION", MAKE_VERSION); 1374 #endif 1375 Global_Set_ReadOnly(".newline", "\n"); 1376 #ifndef MAKEFILE_PREFERENCE_LIST 1377 /* This is the traditional preference for makefiles. */ 1378 # define MAKEFILE_PREFERENCE_LIST "makefile Makefile" 1379 #endif 1380 Global_Set(".MAKE.MAKEFILE_PREFERENCE", MAKEFILE_PREFERENCE_LIST); 1381 Global_Set(".MAKE.DEPENDFILE", ".depend"); 1382 /* Tell makefiles like jobs.mk whether we support -jC */ 1383 #ifdef _SC_NPROCESSORS_ONLN 1384 Global_Set_ReadOnly(".MAKE.JOBS.C", "yes"); 1385 #else 1386 Global_Set_ReadOnly(".MAKE.JOBS.C", "no"); 1387 #endif 1388 1389 CmdOpts_Init(); 1390 allPrecious = false; /* Remove targets when interrupted */ 1391 deleteOnError = false; /* Historical default behavior */ 1392 jobsRunning = false; 1393 1394 maxJobTokens = opts.maxJobs; 1395 ignorePWD = false; 1396 1397 /* 1398 * Initialize the parsing, directory and variable modules to prepare 1399 * for the reading of inclusion paths and variable settings on the 1400 * command line 1401 */ 1402 1403 /* 1404 * Initialize various variables. 1405 * MAKE also gets this name, for compatibility 1406 * .MAKEFLAGS gets set to the empty string just in case. 1407 * MFLAGS also gets initialized empty, for compatibility. 1408 */ 1409 Parse_Init(); 1410 InitVarMake(argv[0]); 1411 Global_Set(MAKEFLAGS, ""); 1412 Global_Set(".MAKEOVERRIDES", ""); 1413 Global_Set("MFLAGS", ""); 1414 Global_Set(".ALLTARGETS", ""); 1415 Global_Set_ReadOnly(".MAKE.LEVEL.ENV", MAKE_LEVEL_ENV); 1416 1417 /* Set some other useful variables. */ 1418 { 1419 char buf[64], *ep = getenv(MAKE_LEVEL_ENV); 1420 1421 makelevel = ep != NULL && ep[0] != '\0' ? atoi(ep) : 0; 1422 if (makelevel < 0) 1423 makelevel = 0; 1424 snprintf(buf, sizeof buf, "%d", makelevel); 1425 Global_Set(".MAKE.LEVEL", buf); 1426 snprintf(buf, sizeof buf, "%u", myPid); 1427 Global_Set_ReadOnly(".MAKE.PID", buf); 1428 snprintf(buf, sizeof buf, "%u", getppid()); 1429 Global_Set_ReadOnly(".MAKE.PPID", buf); 1430 snprintf(buf, sizeof buf, "%u", getuid()); 1431 Global_Set_ReadOnly(".MAKE.UID", buf); 1432 snprintf(buf, sizeof buf, "%u", getgid()); 1433 Global_Set_ReadOnly(".MAKE.GID", buf); 1434 } 1435 if (makelevel > 0) { 1436 char pn[1024]; 1437 snprintf(pn, sizeof pn, "%s[%d]", progname, makelevel); 1438 progname = bmake_strdup(pn); 1439 } 1440 1441 #ifdef USE_META 1442 meta_init(); 1443 #endif 1444 Dir_Init(); 1445 1446 { 1447 char *makeflags = explode(getenv("MAKEFLAGS")); 1448 Main_ParseArgLine(makeflags); 1449 free(makeflags); 1450 } 1451 1452 if (getcwd(curdir, MAXPATHLEN) == NULL) { 1453 (void)fprintf(stderr, "%s: getcwd: %s.\n", 1454 progname, strerror(errno)); 1455 exit(2); 1456 } 1457 1458 MainParseArgs(argc, argv); 1459 1460 if (opts.enterFlag) 1461 printf("%s: Entering directory `%s'\n", progname, curdir); 1462 1463 if (stat(curdir, &sa) == -1) { 1464 (void)fprintf(stderr, "%s: %s: %s.\n", 1465 progname, curdir, strerror(errno)); 1466 exit(2); 1467 } 1468 1469 #ifndef NO_PWD_OVERRIDE 1470 HandlePWD(&sa); 1471 #endif 1472 Global_Set(".CURDIR", curdir); 1473 1474 InitObjdir(machine, machine_arch); 1475 1476 Arch_Init(); 1477 Suff_Init(); 1478 Trace_Init(tracefile); 1479 1480 defaultNode = NULL; 1481 (void)time(&now); 1482 1483 Trace_Log(MAKESTART, NULL); 1484 1485 InitVarTargets(); 1486 1487 InitDefSysIncPath(syspath); 1488 } 1489 1490 /* 1491 * Read the system makefile followed by either makefile, Makefile or the 1492 * files given by the -f option. Exit on parse errors. 1493 */ 1494 static void 1495 main_ReadFiles(void) 1496 { 1497 1498 if (Lst_IsEmpty(&sysIncPath->dirs)) 1499 SearchPath_AddAll(sysIncPath, defSysIncPath); 1500 1501 Dir_SetSYSPATH(); 1502 if (!opts.noBuiltins) 1503 ReadBuiltinRules(); 1504 1505 posix_state = PS_MAYBE_NEXT_LINE; 1506 if (!Lst_IsEmpty(&opts.makefiles)) 1507 ReadAllMakefiles(&opts.makefiles); 1508 else 1509 ReadFirstDefaultMakefile(); 1510 } 1511 1512 /* Compute the dependency graph. */ 1513 static void 1514 main_PrepareMaking(void) 1515 { 1516 /* In particular suppress .depend for '-r -V .OBJDIR -f /dev/null' */ 1517 if (!opts.noBuiltins || opts.printVars == PVM_NONE) { 1518 makeDependfile = Var_Subst("${.MAKE.DEPENDFILE}", 1519 SCOPE_CMDLINE, VARE_EVAL); 1520 if (makeDependfile[0] != '\0') { 1521 /* TODO: handle errors */ 1522 doing_depend = true; 1523 (void)ReadMakefile(makeDependfile); 1524 doing_depend = false; 1525 } 1526 } 1527 1528 if (enterFlagObj) 1529 printf("%s: Entering directory `%s'\n", progname, objdir); 1530 1531 MakeMode(); 1532 1533 { 1534 FStr makeflags = Var_Value(SCOPE_GLOBAL, MAKEFLAGS); 1535 Global_Append("MFLAGS", makeflags.str); 1536 FStr_Done(&makeflags); 1537 } 1538 1539 InitMaxJobs(); 1540 1541 if (!opts.compatMake && !forceJobs) 1542 opts.compatMake = true; 1543 1544 if (!opts.compatMake) 1545 Job_ServerStart(maxJobTokens, jp_0, jp_1); 1546 DEBUG5(JOB, "job_pipe %d %d, maxjobs %d, tokens %d, compat %d\n", 1547 jp_0, jp_1, opts.maxJobs, maxJobTokens, opts.compatMake ? 1 : 0); 1548 1549 if (opts.printVars == PVM_NONE) 1550 Main_ExportMAKEFLAGS(true); /* initial export */ 1551 1552 InitVpath(); 1553 1554 /* 1555 * Now that all search paths have been read for suffixes et al, it's 1556 * time to add the default search path to their lists... 1557 */ 1558 Suff_ExtendPaths(); 1559 1560 /* 1561 * Propagate attributes through :: dependency lists. 1562 */ 1563 Targ_Propagate(); 1564 1565 /* print the initial graph, if the user requested it */ 1566 if (DEBUG(GRAPH1)) 1567 Targ_PrintGraph(1); 1568 } 1569 1570 /* 1571 * Make the targets. 1572 * If the -v or -V options are given, print variables instead. 1573 * Return whether any of the targets is out-of-date. 1574 */ 1575 static bool 1576 main_Run(void) 1577 { 1578 if (opts.printVars != PVM_NONE) { 1579 /* print the values of any variables requested by the user */ 1580 doPrintVars(); 1581 return false; 1582 } else { 1583 return runTargets(); 1584 } 1585 } 1586 1587 /* Clean up after making the targets. */ 1588 static void 1589 main_CleanUp(void) 1590 { 1591 #ifdef CLEANUP 1592 Lst_DoneFree(&opts.variables); 1593 Lst_DoneFree(&opts.makefiles); 1594 Lst_DoneFree(&opts.create); 1595 #endif 1596 1597 if (DEBUG(GRAPH2)) 1598 Targ_PrintGraph(2); 1599 1600 Trace_Log(MAKEEND, NULL); 1601 1602 if (enterFlagObj) 1603 printf("%s: Leaving directory `%s'\n", progname, objdir); 1604 if (opts.enterFlag) 1605 printf("%s: Leaving directory `%s'\n", progname, curdir); 1606 1607 #ifdef USE_META 1608 meta_finish(); 1609 #endif 1610 Suff_End(); 1611 Var_End(); 1612 Targ_End(); 1613 Arch_End(); 1614 Parse_End(); 1615 Dir_End(); 1616 Job_End(); 1617 Trace_End(); 1618 Str_Intern_End(); 1619 } 1620 1621 /* Determine the exit code. */ 1622 static int 1623 main_Exit(bool outOfDate) 1624 { 1625 if (opts.strict && (main_errors > 0 || Parse_NumErrors() > 0)) 1626 return 2; /* Not 1 so -q can distinguish error */ 1627 return outOfDate ? 1 : 0; 1628 } 1629 1630 int 1631 main(int argc, char **argv) 1632 { 1633 bool outOfDate; 1634 1635 main_Init(argc, argv); 1636 main_ReadFiles(); 1637 main_PrepareMaking(); 1638 outOfDate = main_Run(); 1639 main_CleanUp(); 1640 return main_Exit(outOfDate); 1641 } 1642 1643 /* 1644 * Open and parse the given makefile, with all its side effects. 1645 * Return false if the file could not be opened. 1646 */ 1647 static bool 1648 ReadMakefile(const char *fname) 1649 { 1650 int fd; 1651 char *name, *path = NULL; 1652 1653 if (strcmp(fname, "-") == 0) { 1654 Parse_File("(stdin)", -1); 1655 Var_Set(SCOPE_INTERNAL, "MAKEFILE", ""); 1656 } else { 1657 /* if we've chdir'd, rebuild the path name */ 1658 if (strcmp(curdir, objdir) != 0 && *fname != '/') { 1659 path = str_concat3(curdir, "/", fname); 1660 fd = open(path, O_RDONLY); 1661 if (fd != -1) { 1662 fname = path; 1663 goto found; 1664 } 1665 free(path); 1666 1667 /* If curdir failed, try objdir (ala .depend) */ 1668 path = str_concat3(objdir, "/", fname); 1669 fd = open(path, O_RDONLY); 1670 if (fd != -1) { 1671 fname = path; 1672 goto found; 1673 } 1674 } else { 1675 fd = open(fname, O_RDONLY); 1676 if (fd != -1) 1677 goto found; 1678 } 1679 /* look in -I and system include directories. */ 1680 name = Dir_FindFile(fname, parseIncPath); 1681 if (name == NULL) { 1682 SearchPath *sysInc = Lst_IsEmpty(&sysIncPath->dirs) 1683 ? defSysIncPath : sysIncPath; 1684 name = Dir_FindFile(fname, sysInc); 1685 } 1686 if (name == NULL || (fd = open(name, O_RDONLY)) == -1) { 1687 free(name); 1688 free(path); 1689 return false; 1690 } 1691 fname = name; 1692 /* 1693 * set the MAKEFILE variable desired by System V fans -- the 1694 * placement of the setting here means it gets set to the last 1695 * makefile specified, as it is set by SysV make. 1696 */ 1697 found: 1698 if (!doing_depend) 1699 Var_Set(SCOPE_INTERNAL, "MAKEFILE", fname); 1700 Parse_File(fname, fd); 1701 } 1702 free(path); 1703 return true; 1704 } 1705 1706 /* 1707 * Execute the command in cmd, and return its output (only stdout, not 1708 * stderr, possibly empty). In the output, replace newlines with spaces. 1709 */ 1710 char * 1711 Cmd_Exec(const char *cmd, char **error) 1712 { 1713 const char *args[4]; /* Arguments for invoking the shell */ 1714 int pipefds[2]; 1715 int cpid; /* Child PID */ 1716 int pid; /* PID from wait() */ 1717 int status; /* command exit status */ 1718 Buffer buf; /* buffer to store the result */ 1719 ssize_t bytes_read; 1720 char *output; 1721 char *p; 1722 int saved_errno; 1723 char cmd_file[MAXPATHLEN]; 1724 size_t cmd_len; 1725 int cmd_fd = -1; 1726 1727 if (shellPath == NULL) 1728 Shell_Init(); 1729 1730 cmd_len = strlen(cmd); 1731 if (cmd_len > 1000) { 1732 cmd_fd = mkTempFile(NULL, cmd_file, sizeof(cmd_file)); 1733 if (cmd_fd >= 0) { 1734 ssize_t n; 1735 1736 n = write(cmd_fd, cmd, cmd_len); 1737 close(cmd_fd); 1738 if (n < (ssize_t)cmd_len) { 1739 unlink(cmd_file); 1740 cmd_fd = -1; 1741 } 1742 } 1743 } 1744 1745 args[0] = shellName; 1746 if (cmd_fd >= 0) { 1747 args[1] = cmd_file; 1748 args[2] = NULL; 1749 } else { 1750 cmd_file[0] = '\0'; 1751 args[1] = "-c"; 1752 args[2] = cmd; 1753 args[3] = NULL; 1754 } 1755 DEBUG1(VAR, "Capturing the output of command \"%s\"\n", cmd); 1756 1757 if (pipe(pipefds) == -1) { 1758 *error = str_concat3( 1759 "Couldn't create pipe for \"", cmd, "\""); 1760 return bmake_strdup(""); 1761 } 1762 1763 Var_ReexportVars(SCOPE_GLOBAL); 1764 1765 switch (cpid = vfork()) { 1766 case 0: 1767 (void)close(pipefds[0]); 1768 (void)dup2(pipefds[1], STDOUT_FILENO); 1769 (void)close(pipefds[1]); 1770 1771 (void)execv(shellPath, UNCONST(args)); 1772 _exit(1); 1773 /* NOTREACHED */ 1774 1775 case -1: 1776 *error = str_concat3("Couldn't exec \"", cmd, "\""); 1777 return bmake_strdup(""); 1778 } 1779 1780 (void)close(pipefds[1]); /* No need for the writing half */ 1781 1782 saved_errno = 0; 1783 Buf_Init(&buf); 1784 1785 do { 1786 char result[BUFSIZ]; 1787 bytes_read = read(pipefds[0], result, sizeof result); 1788 if (bytes_read > 0) 1789 Buf_AddBytes(&buf, result, (size_t)bytes_read); 1790 } while (bytes_read > 0 || (bytes_read == -1 && errno == EINTR)); 1791 if (bytes_read == -1) 1792 saved_errno = errno; 1793 1794 (void)close(pipefds[0]); /* Close the input side of the pipe. */ 1795 1796 while ((pid = waitpid(cpid, &status, 0)) != cpid && pid >= 0) 1797 JobReapChild(pid, status, false); 1798 1799 if (Buf_EndsWith(&buf, '\n')) 1800 buf.data[buf.len - 1] = '\0'; 1801 1802 output = Buf_DoneData(&buf); 1803 for (p = output; *p != '\0'; p++) 1804 if (*p == '\n') 1805 *p = ' '; 1806 1807 if (WIFSIGNALED(status)) 1808 *error = str_concat3("\"", cmd, "\" exited on a signal"); 1809 else if (WEXITSTATUS(status) != 0) 1810 *error = str_concat3( 1811 "\"", cmd, "\" returned non-zero status"); 1812 else if (saved_errno != 0) 1813 *error = str_concat3( 1814 "Couldn't read shell's output for \"", cmd, "\""); 1815 else 1816 *error = NULL; 1817 if (cmd_file[0] != '\0') 1818 unlink(cmd_file); 1819 return output; 1820 } 1821 1822 /* 1823 * Print a printf-style error message. 1824 * 1825 * In default mode, this error message has no consequences, for compatibility 1826 * reasons, in particular it does not affect the exit status. Only in lint 1827 * mode (-dL) it does. 1828 */ 1829 void 1830 Error(const char *fmt, ...) 1831 { 1832 va_list ap; 1833 FILE *f; 1834 1835 f = opts.debug_file; 1836 if (f == stdout) 1837 f = stderr; 1838 (void)fflush(stdout); 1839 1840 for (;;) { 1841 fprintf(f, "%s: ", progname); 1842 va_start(ap, fmt); 1843 (void)vfprintf(f, fmt, ap); 1844 va_end(ap); 1845 (void)fprintf(f, "\n"); 1846 (void)fflush(f); 1847 if (f == stderr) 1848 break; 1849 f = stderr; 1850 } 1851 main_errors++; 1852 } 1853 1854 /* 1855 * Wait for any running jobs to finish, then produce an error message, 1856 * finally exit immediately. 1857 * 1858 * Exiting immediately differs from Parse_Error, which exits only after the 1859 * current top-level makefile has been parsed completely. 1860 */ 1861 void 1862 Fatal(const char *fmt, ...) 1863 { 1864 va_list ap; 1865 1866 if (jobsRunning) 1867 Job_Wait(); 1868 1869 (void)fflush(stdout); 1870 fprintf(stderr, "%s: ", progname); 1871 va_start(ap, fmt); 1872 (void)vfprintf(stderr, fmt, ap); 1873 va_end(ap); 1874 (void)fprintf(stderr, "\n"); 1875 (void)fflush(stderr); 1876 PrintStackTrace(true); 1877 1878 PrintOnError(NULL, "\n"); 1879 1880 if (DEBUG(GRAPH2) || DEBUG(GRAPH3)) 1881 Targ_PrintGraph(2); 1882 Trace_Log(MAKEERROR, NULL); 1883 exit(2); /* Not 1 so -q can distinguish error */ 1884 } 1885 1886 /* 1887 * Major exception once jobs are being created. 1888 * Kills all jobs, prints a message and exits. 1889 */ 1890 void 1891 Punt(const char *fmt, ...) 1892 { 1893 va_list ap; 1894 1895 (void)fflush(stdout); 1896 (void)fprintf(stderr, "%s: ", progname); 1897 va_start(ap, fmt); 1898 (void)vfprintf(stderr, fmt, ap); 1899 va_end(ap); 1900 (void)fprintf(stderr, "\n"); 1901 (void)fflush(stderr); 1902 1903 PrintOnError(NULL, "\n"); 1904 1905 DieHorribly(); 1906 } 1907 1908 /* Exit without giving a message. */ 1909 void 1910 DieHorribly(void) 1911 { 1912 if (jobsRunning) 1913 Job_AbortAll(); 1914 if (DEBUG(GRAPH2)) 1915 Targ_PrintGraph(2); 1916 Trace_Log(MAKEERROR, NULL); 1917 exit(2); /* Not 1 so -q can distinguish error */ 1918 } 1919 1920 /* 1921 * Called when aborting due to errors in child shell to signal abnormal exit. 1922 * The program exits. 1923 * Errors is the number of errors encountered in Make_Make. 1924 */ 1925 void 1926 Finish(int errs) 1927 { 1928 if (shouldDieQuietly(NULL, -1)) 1929 exit(2); 1930 Fatal("%d error%s", errs, errs == 1 ? "" : "s"); 1931 } 1932 1933 int 1934 unlink_file(const char *file) 1935 { 1936 struct stat st; 1937 1938 if (lstat(file, &st) == -1) 1939 return -1; 1940 1941 if (S_ISDIR(st.st_mode)) { 1942 /* 1943 * POSIX says for unlink: "The path argument shall not name 1944 * a directory unless [...]". 1945 */ 1946 errno = EISDIR; 1947 return -1; 1948 } 1949 return unlink(file); 1950 } 1951 1952 static void 1953 write_all(int fd, const void *data, size_t n) 1954 { 1955 const char *mem = data; 1956 1957 while (n > 0) { 1958 ssize_t written = write(fd, mem, n); 1959 /* XXX: Should this EAGAIN be EINTR? */ 1960 if (written == -1 && errno == EAGAIN) 1961 continue; 1962 if (written == -1) 1963 break; 1964 mem += written; 1965 n -= (size_t)written; 1966 } 1967 } 1968 1969 /* Print why exec failed, avoiding stdio. */ 1970 void MAKE_ATTR_DEAD 1971 execDie(const char *af, const char *av) 1972 { 1973 Buffer buf; 1974 1975 Buf_Init(&buf); 1976 Buf_AddStr(&buf, progname); 1977 Buf_AddStr(&buf, ": "); 1978 Buf_AddStr(&buf, af); 1979 Buf_AddStr(&buf, "("); 1980 Buf_AddStr(&buf, av); 1981 Buf_AddStr(&buf, ") failed ("); 1982 Buf_AddStr(&buf, strerror(errno)); 1983 Buf_AddStr(&buf, ")\n"); 1984 1985 write_all(STDERR_FILENO, buf.data, buf.len); 1986 1987 Buf_Done(&buf); 1988 _exit(1); 1989 } 1990 1991 static void 1992 purge_relative_cached_realpaths(void) 1993 { 1994 HashIter hi; 1995 bool more; 1996 1997 HashIter_Init(&hi, &cached_realpaths); 1998 more = HashIter_Next(&hi); 1999 while (more) { 2000 HashEntry *he = hi.entry; 2001 more = HashIter_Next(&hi); 2002 if (he->key[0] != '/') { 2003 DEBUG1(DIR, "cached_realpath: purging %s\n", he->key); 2004 free(he->value); 2005 HashTable_DeleteEntry(&cached_realpaths, he); 2006 } 2007 } 2008 } 2009 2010 const char * 2011 cached_realpath(const char *pathname, char *resolved) 2012 { 2013 const char *rp; 2014 2015 if (pathname == NULL || pathname[0] == '\0') 2016 return NULL; 2017 2018 rp = HashTable_FindValue(&cached_realpaths, pathname); 2019 if (rp != NULL) { 2020 snprintf(resolved, MAXPATHLEN, "%s", rp); 2021 return resolved; 2022 } 2023 2024 rp = realpath(pathname, resolved); 2025 if (rp != NULL) { 2026 HashTable_Set(&cached_realpaths, pathname, bmake_strdup(rp)); 2027 DEBUG2(DIR, "cached_realpath: %s -> %s\n", pathname, rp); 2028 return resolved; 2029 } 2030 2031 /* should we negative-cache? */ 2032 return NULL; 2033 } 2034 2035 /* 2036 * Return true if we should die without noise. 2037 * For example our failing child was a sub-make or failure happened elsewhere. 2038 */ 2039 bool 2040 shouldDieQuietly(GNode *gn, int bf) 2041 { 2042 static int quietly = -1; 2043 2044 if (quietly < 0) { 2045 if (DEBUG(JOB) || 2046 !GetBooleanExpr("${.MAKE.DIE_QUIETLY}", true)) 2047 quietly = 0; 2048 else if (bf >= 0) 2049 quietly = bf; 2050 else 2051 quietly = (gn != NULL && (gn->type & OP_MAKE)) ? 1 : 0; 2052 } 2053 return quietly != 0; 2054 } 2055 2056 static void 2057 SetErrorVars(GNode *gn) 2058 { 2059 StringListNode *ln; 2060 char sts[16]; 2061 2062 /* 2063 * We can print this even if there is no .ERROR target. 2064 */ 2065 snprintf(sts, sizeof(sts), "%d", gn->exit_status); 2066 Global_Set(".ERROR_EXIT", sts); 2067 Global_Set(".ERROR_TARGET", gn->name); 2068 Global_Delete(".ERROR_CMD"); 2069 2070 for (ln = gn->commands.first; ln != NULL; ln = ln->next) { 2071 const char *cmd = ln->datum; 2072 2073 if (cmd == NULL) 2074 break; 2075 Global_Append(".ERROR_CMD", cmd); 2076 } 2077 } 2078 2079 /* 2080 * Print some helpful information in case of an error. 2081 * The caller should exit soon after calling this function. 2082 */ 2083 void 2084 PrintOnError(GNode *gn, const char *msg) 2085 { 2086 static GNode *errorNode = NULL; 2087 2088 if (DEBUG(HASH)) { 2089 Targ_Stats(); 2090 Var_Stats(); 2091 } 2092 2093 if (errorNode != NULL) 2094 return; /* we've been here! */ 2095 2096 printf("%s%s: stopped in %s\n", msg, progname, curdir); 2097 2098 /* we generally want to keep quiet if a sub-make died */ 2099 if (shouldDieQuietly(gn, -1)) 2100 return; 2101 2102 if (gn != NULL) 2103 SetErrorVars(gn); 2104 2105 { 2106 char *errorVarsValues = Var_Subst( 2107 "${MAKE_PRINT_VAR_ON_ERROR:@v@$v='${$v}'\n@}", 2108 SCOPE_GLOBAL, VARE_EVAL); 2109 /* TODO: handle errors */ 2110 printf("%s", errorVarsValues); 2111 free(errorVarsValues); 2112 } 2113 2114 fflush(stdout); 2115 2116 /* 2117 * Finally, see if there is a .ERROR target, and run it if so. 2118 */ 2119 errorNode = Targ_FindNode(".ERROR"); 2120 if (errorNode != NULL) { 2121 errorNode->type |= OP_SPECIAL; 2122 Compat_Make(errorNode, errorNode); 2123 } 2124 } 2125 2126 void 2127 Main_ExportMAKEFLAGS(bool first) 2128 { 2129 static bool once = true; 2130 char *flags; 2131 2132 if (once != first) 2133 return; 2134 once = false; 2135 2136 flags = Var_Subst( 2137 "${.MAKEFLAGS} ${.MAKEOVERRIDES:O:u:@v@$v=${$v:Q}@}", 2138 SCOPE_CMDLINE, VARE_EVAL); 2139 /* TODO: handle errors */ 2140 if (flags[0] != '\0') 2141 setenv("MAKEFLAGS", flags, 1); 2142 free(flags); 2143 } 2144 2145 char * 2146 getTmpdir(void) 2147 { 2148 static char *tmpdir = NULL; 2149 struct stat st; 2150 2151 if (tmpdir != NULL) 2152 return tmpdir; 2153 2154 /* Honor $TMPDIR if it is valid, strip a trailing '/'. */ 2155 tmpdir = Var_Subst("${TMPDIR:tA:U" _PATH_TMP ":S,/$,,W}/", 2156 SCOPE_GLOBAL, VARE_EVAL); 2157 /* TODO: handle errors */ 2158 2159 if (stat(tmpdir, &st) < 0 || !S_ISDIR(st.st_mode)) { 2160 free(tmpdir); 2161 tmpdir = bmake_strdup(_PATH_TMP); 2162 } 2163 return tmpdir; 2164 } 2165 2166 /* 2167 * Create and open a temp file using "pattern". 2168 * If tfile is provided, set it to a copy of the filename created. 2169 * Otherwise unlink the file once open. 2170 */ 2171 int 2172 mkTempFile(const char *pattern, char *tfile, size_t tfile_sz) 2173 { 2174 static char *tmpdir = NULL; 2175 char tbuf[MAXPATHLEN]; 2176 int fd; 2177 2178 if (pattern == NULL) 2179 pattern = TMPPAT; 2180 if (tmpdir == NULL) 2181 tmpdir = getTmpdir(); 2182 if (tfile == NULL) { 2183 tfile = tbuf; 2184 tfile_sz = sizeof tbuf; 2185 } 2186 2187 if (pattern[0] == '/') 2188 snprintf(tfile, tfile_sz, "%s", pattern); 2189 else 2190 snprintf(tfile, tfile_sz, "%s%s", tmpdir, pattern); 2191 2192 if ((fd = mkstemp(tfile)) < 0) 2193 Punt("Could not create temporary file %s: %s", tfile, 2194 strerror(errno)); 2195 if (tfile == tbuf) 2196 unlink(tfile); /* we just want the descriptor */ 2197 2198 return fd; 2199 } 2200 2201 /* 2202 * Convert a string representation of a boolean into a boolean value. 2203 * Anything that looks like "No", "False", "Off", "0" etc. is false, 2204 * the empty string is the fallback, everything else is true. 2205 */ 2206 bool 2207 ParseBoolean(const char *s, bool fallback) 2208 { 2209 char ch = ch_tolower(s[0]); 2210 if (ch == '\0') 2211 return fallback; 2212 if (ch == '0' || ch == 'f' || ch == 'n') 2213 return false; 2214 if (ch == 'o') 2215 return ch_tolower(s[1]) != 'f'; 2216 return true; 2217 } 2218