main.c revision 1.597
1 /* $NetBSD: main.c,v 1.597 2023/09/10 10:18:05 rillig Exp $ */ 2 3 /* 4 * Copyright (c) 1988, 1989, 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Adam de Boor. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 /* 36 * Copyright (c) 1989 by Berkeley Softworks 37 * All rights reserved. 38 * 39 * This code is derived from software contributed to Berkeley by 40 * Adam de Boor. 41 * 42 * Redistribution and use in source and binary forms, with or without 43 * modification, are permitted provided that the following conditions 44 * are met: 45 * 1. Redistributions of source code must retain the above copyright 46 * notice, this list of conditions and the following disclaimer. 47 * 2. Redistributions in binary form must reproduce the above copyright 48 * notice, this list of conditions and the following disclaimer in the 49 * documentation and/or other materials provided with the distribution. 50 * 3. All advertising materials mentioning features or use of this software 51 * must display the following acknowledgement: 52 * This product includes software developed by the University of 53 * California, Berkeley and its contributors. 54 * 4. Neither the name of the University nor the names of its contributors 55 * may be used to endorse or promote products derived from this software 56 * without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 68 * SUCH DAMAGE. 69 */ 70 71 /* 72 * The main file for this entire program. Exit routines etc. reside here. 73 * 74 * Utility functions defined in this file: 75 * 76 * Main_ParseArgLine 77 * Parse and process command line arguments from a 78 * single string. Used to implement the special targets 79 * .MFLAGS and .MAKEFLAGS. 80 * 81 * Error Print a tagged error message. 82 * 83 * Fatal Print an error message and exit. 84 * 85 * Punt Abort all jobs and exit with a message. 86 * 87 * Finish Finish things up by printing the number of errors 88 * that occurred, and exit. 89 */ 90 91 #include <sys/types.h> 92 #include <sys/time.h> 93 #include <sys/param.h> 94 #include <sys/resource.h> 95 #include <sys/stat.h> 96 #ifdef MAKE_NATIVE 97 #include <sys/sysctl.h> 98 #endif 99 #include <sys/utsname.h> 100 #include <sys/wait.h> 101 102 #include <errno.h> 103 #include <signal.h> 104 #include <stdarg.h> 105 #include <time.h> 106 107 #include "make.h" 108 #include "dir.h" 109 #include "job.h" 110 #include "pathnames.h" 111 #include "trace.h" 112 113 /* "@(#)main.c 8.3 (Berkeley) 3/19/94" */ 114 MAKE_RCSID("$NetBSD: main.c,v 1.597 2023/09/10 10:18:05 rillig Exp $"); 115 #if defined(MAKE_NATIVE) && !defined(lint) 116 __COPYRIGHT("@(#) Copyright (c) 1988, 1989, 1990, 1993 " 117 "The Regents of the University of California. " 118 "All rights reserved."); 119 #endif 120 121 CmdOpts opts; 122 time_t now; /* Time at start of make */ 123 GNode *defaultNode; /* .DEFAULT node */ 124 bool allPrecious; /* .PRECIOUS given on line by itself */ 125 bool deleteOnError; /* .DELETE_ON_ERROR: set */ 126 127 static int maxJobTokens; /* -j argument */ 128 static bool enterFlagObj; /* -w and objdir != srcdir */ 129 130 static int jp_0 = -1, jp_1 = -1; /* ends of parent job pipe */ 131 bool doing_depend; /* Set while reading .depend */ 132 static bool jobsRunning; /* true if the jobs might be running */ 133 static const char *tracefile; 134 static bool ReadMakefile(const char *); 135 static void purge_relative_cached_realpaths(void); 136 137 static bool ignorePWD; /* if we use -C, PWD is meaningless */ 138 static char objdir[MAXPATHLEN + 1]; /* where we chdir'ed to */ 139 char curdir[MAXPATHLEN + 1]; /* Startup directory */ 140 const char *progname; 141 char *makeDependfile; 142 pid_t myPid; 143 int makelevel; 144 145 bool forceJobs = false; 146 static int main_errors = 0; 147 static HashTable cached_realpaths; 148 149 /* 150 * For compatibility with the POSIX version of MAKEFLAGS that includes 151 * all the options without '-', convert 'flags' to '-f -l -a -g -s'. 152 */ 153 static char * 154 explode(const char *flags) 155 { 156 char *exploded, *ep; 157 const char *p; 158 159 if (flags == NULL) 160 return NULL; 161 162 for (p = flags; *p != '\0'; p++) 163 if (!ch_isalpha(*p)) 164 return bmake_strdup(flags); 165 166 exploded = bmake_malloc((size_t)(p - flags) * 3 + 1); 167 for (p = flags, ep = exploded; *p != '\0'; p++) { 168 *ep++ = '-'; 169 *ep++ = *p; 170 *ep++ = ' '; 171 } 172 *ep = '\0'; 173 return exploded; 174 } 175 176 MAKE_ATTR_DEAD static void 177 usage(void) 178 { 179 size_t prognameLen = strcspn(progname, "["); 180 181 (void)fprintf(stderr, 182 "usage: %.*s [-BeikNnqrSstWwX]\n" 183 " [-C directory] [-D variable] [-d flags] [-f makefile]\n" 184 " [-I directory] [-J private] [-j max_jobs] [-m directory] [-T file]\n" 185 " [-V variable] [-v variable] [variable=value] [target ...]\n", 186 (int)prognameLen, progname); 187 exit(2); 188 } 189 190 static void 191 MainParseArgDebugFile(const char *arg) 192 { 193 const char *mode; 194 size_t len; 195 char *fname; 196 197 if (opts.debug_file != stdout && opts.debug_file != stderr) 198 fclose(opts.debug_file); 199 200 if (*arg == '+') { 201 arg++; 202 mode = "a"; 203 } else 204 mode = "w"; 205 206 if (strcmp(arg, "stdout") == 0) { 207 opts.debug_file = stdout; 208 return; 209 } 210 if (strcmp(arg, "stderr") == 0) { 211 opts.debug_file = stderr; 212 return; 213 } 214 215 len = strlen(arg); 216 fname = bmake_malloc(len + 20); 217 memcpy(fname, arg, len + 1); 218 219 /* Replace the trailing '%d' after '.%d' with the pid. */ 220 if (len >= 3 && memcmp(fname + len - 3, ".%d", 3) == 0) 221 snprintf(fname + len - 2, 20, "%d", getpid()); 222 223 opts.debug_file = fopen(fname, mode); 224 if (opts.debug_file == NULL) { 225 fprintf(stderr, "Cannot open debug file \"%s\"\n", 226 fname); 227 exit(2); 228 } 229 free(fname); 230 } 231 232 static void 233 MainParseArgDebug(const char *argvalue) 234 { 235 const char *modules; 236 DebugFlags debug = opts.debug; 237 238 for (modules = argvalue; *modules != '\0'; modules++) { 239 switch (*modules) { 240 case '0': /* undocumented, only intended for tests */ 241 memset(&debug, 0, sizeof(debug)); 242 break; 243 case 'A': 244 memset(&debug, ~0, sizeof(debug)); 245 break; 246 case 'a': 247 debug.DEBUG_ARCH = true; 248 break; 249 case 'C': 250 debug.DEBUG_CWD = true; 251 break; 252 case 'c': 253 debug.DEBUG_COND = true; 254 break; 255 case 'd': 256 debug.DEBUG_DIR = true; 257 break; 258 case 'e': 259 debug.DEBUG_ERROR = true; 260 break; 261 case 'f': 262 debug.DEBUG_FOR = true; 263 break; 264 case 'g': 265 if (modules[1] == '1') { 266 debug.DEBUG_GRAPH1 = true; 267 modules++; 268 } else if (modules[1] == '2') { 269 debug.DEBUG_GRAPH2 = true; 270 modules++; 271 } else if (modules[1] == '3') { 272 debug.DEBUG_GRAPH3 = true; 273 modules++; 274 } 275 break; 276 case 'h': 277 debug.DEBUG_HASH = true; 278 break; 279 case 'j': 280 debug.DEBUG_JOB = true; 281 break; 282 case 'L': 283 opts.strict = true; 284 break; 285 case 'l': 286 debug.DEBUG_LOUD = true; 287 break; 288 case 'M': 289 debug.DEBUG_META = true; 290 break; 291 case 'm': 292 debug.DEBUG_MAKE = true; 293 break; 294 case 'n': 295 debug.DEBUG_SCRIPT = true; 296 break; 297 case 'p': 298 debug.DEBUG_PARSE = true; 299 break; 300 case 's': 301 debug.DEBUG_SUFF = true; 302 break; 303 case 't': 304 debug.DEBUG_TARG = true; 305 break; 306 case 'V': 307 opts.debugVflag = true; 308 break; 309 case 'v': 310 debug.DEBUG_VAR = true; 311 break; 312 case 'x': 313 debug.DEBUG_SHELL = true; 314 break; 315 case 'F': 316 MainParseArgDebugFile(modules + 1); 317 goto finish; 318 default: 319 (void)fprintf(stderr, 320 "%s: illegal argument to d option -- %c\n", 321 progname, *modules); 322 usage(); 323 } 324 } 325 326 finish: 327 opts.debug = debug; 328 329 setvbuf(opts.debug_file, NULL, _IONBF, 0); 330 if (opts.debug_file != stdout) 331 setvbuf(stdout, NULL, _IOLBF, 0); 332 } 333 334 /* Is path relative or does it contain any relative component "." or ".."? */ 335 static bool 336 IsRelativePath(const char *path) 337 { 338 const char *p; 339 340 if (path[0] != '/') 341 return true; 342 p = path; 343 while ((p = strstr(p, "/.")) != NULL) { 344 p += 2; 345 if (*p == '.') 346 p++; 347 if (*p == '/' || *p == '\0') 348 return true; 349 } 350 return false; 351 } 352 353 static void 354 MainParseArgChdir(const char *argvalue) 355 { 356 struct stat sa, sb; 357 358 if (chdir(argvalue) == -1) { 359 (void)fprintf(stderr, "%s: chdir %s: %s\n", 360 progname, argvalue, strerror(errno)); 361 exit(2); /* Not 1 so -q can distinguish error */ 362 } 363 if (getcwd(curdir, MAXPATHLEN) == NULL) { 364 (void)fprintf(stderr, "%s: %s.\n", progname, strerror(errno)); 365 exit(2); 366 } 367 if (!IsRelativePath(argvalue) && 368 stat(argvalue, &sa) != -1 && 369 stat(curdir, &sb) != -1 && 370 sa.st_ino == sb.st_ino && 371 sa.st_dev == sb.st_dev) 372 strncpy(curdir, argvalue, MAXPATHLEN); 373 ignorePWD = true; 374 } 375 376 static void 377 MainParseArgJobsInternal(const char *argvalue) 378 { 379 char end; 380 if (sscanf(argvalue, "%d,%d%c", &jp_0, &jp_1, &end) != 2) { 381 (void)fprintf(stderr, 382 "%s: internal error -- J option malformed (%s)\n", 383 progname, argvalue); 384 usage(); 385 } 386 if ((fcntl(jp_0, F_GETFD, 0) < 0) || 387 (fcntl(jp_1, F_GETFD, 0) < 0)) { 388 jp_0 = -1; 389 jp_1 = -1; 390 opts.compatMake = true; 391 } else { 392 Global_Append(MAKEFLAGS, "-J"); 393 Global_Append(MAKEFLAGS, argvalue); 394 } 395 } 396 397 static void 398 MainParseArgJobs(const char *arg) 399 { 400 const char *p; 401 char *end; 402 char v[12]; 403 404 forceJobs = true; 405 opts.maxJobs = (int)strtol(arg, &end, 0); 406 p = arg + (end - arg); 407 #ifdef _SC_NPROCESSORS_ONLN 408 if (*p != '\0') { 409 double d; 410 411 if (*p == 'C') { 412 d = (opts.maxJobs > 0) ? opts.maxJobs : 1; 413 } else if (*p == '.') { 414 d = strtod(arg, &end); 415 p = arg + (end - arg); 416 } else 417 d = 0; 418 if (d > 0) { 419 p = ""; 420 opts.maxJobs = (int)sysconf(_SC_NPROCESSORS_ONLN); 421 opts.maxJobs = (int)(d * (double)opts.maxJobs); 422 } 423 } 424 #endif 425 if (*p != '\0' || opts.maxJobs < 1) { 426 (void)fprintf(stderr, 427 "%s: illegal argument to -j -- must be positive integer!\n", 428 progname); 429 exit(2); /* Not 1 so -q can distinguish error */ 430 } 431 snprintf(v, sizeof(v), "%d", opts.maxJobs); 432 Global_Append(MAKEFLAGS, "-j"); 433 Global_Append(MAKEFLAGS, v); 434 Global_Set(".MAKE.JOBS", v); 435 maxJobTokens = opts.maxJobs; 436 } 437 438 static void 439 MainParseArgSysInc(const char *argvalue) 440 { 441 /* look for magic parent directory search string */ 442 if (strncmp(".../", argvalue, 4) == 0) { 443 char *found_path = Dir_FindHereOrAbove(curdir, argvalue + 4); 444 if (found_path == NULL) 445 return; 446 (void)SearchPath_Add(sysIncPath, found_path); 447 free(found_path); 448 } else { 449 (void)SearchPath_Add(sysIncPath, argvalue); 450 } 451 Global_Append(MAKEFLAGS, "-m"); 452 Global_Append(MAKEFLAGS, argvalue); 453 Dir_SetSYSPATH(); 454 } 455 456 static bool 457 MainParseOption(char c, const char *argvalue) 458 { 459 switch (c) { 460 case '\0': 461 break; 462 case 'B': 463 opts.compatMake = true; 464 Global_Append(MAKEFLAGS, "-B"); 465 Global_Set(".MAKE.MODE", "compat"); 466 break; 467 case 'C': 468 MainParseArgChdir(argvalue); 469 break; 470 case 'D': 471 if (argvalue[0] == '\0') 472 return false; 473 Var_SetExpand(SCOPE_GLOBAL, argvalue, "1"); 474 Global_Append(MAKEFLAGS, "-D"); 475 Global_Append(MAKEFLAGS, argvalue); 476 break; 477 case 'I': 478 Parse_AddIncludeDir(argvalue); 479 Global_Append(MAKEFLAGS, "-I"); 480 Global_Append(MAKEFLAGS, argvalue); 481 break; 482 case 'J': 483 MainParseArgJobsInternal(argvalue); 484 break; 485 case 'N': 486 opts.noExecute = true; 487 opts.noRecursiveExecute = true; 488 Global_Append(MAKEFLAGS, "-N"); 489 break; 490 case 'S': 491 opts.keepgoing = false; 492 Global_Append(MAKEFLAGS, "-S"); 493 break; 494 case 'T': 495 tracefile = bmake_strdup(argvalue); 496 Global_Append(MAKEFLAGS, "-T"); 497 Global_Append(MAKEFLAGS, argvalue); 498 break; 499 case 'V': 500 case 'v': 501 opts.printVars = c == 'v' ? PVM_EXPANDED : PVM_UNEXPANDED; 502 Lst_Append(&opts.variables, bmake_strdup(argvalue)); 503 /* XXX: Why always -V? */ 504 Global_Append(MAKEFLAGS, "-V"); 505 Global_Append(MAKEFLAGS, argvalue); 506 break; 507 case 'W': 508 opts.parseWarnFatal = true; 509 /* XXX: why no Global_Append? */ 510 break; 511 case 'X': 512 opts.varNoExportEnv = true; 513 Global_Append(MAKEFLAGS, "-X"); 514 break; 515 case 'd': 516 /* If '-d-opts' don't pass to children */ 517 if (argvalue[0] == '-') 518 argvalue++; 519 else { 520 Global_Append(MAKEFLAGS, "-d"); 521 Global_Append(MAKEFLAGS, argvalue); 522 } 523 MainParseArgDebug(argvalue); 524 break; 525 case 'e': 526 opts.checkEnvFirst = true; 527 Global_Append(MAKEFLAGS, "-e"); 528 break; 529 case 'f': 530 Lst_Append(&opts.makefiles, bmake_strdup(argvalue)); 531 break; 532 case 'i': 533 opts.ignoreErrors = true; 534 Global_Append(MAKEFLAGS, "-i"); 535 break; 536 case 'j': 537 MainParseArgJobs(argvalue); 538 break; 539 case 'k': 540 opts.keepgoing = true; 541 Global_Append(MAKEFLAGS, "-k"); 542 break; 543 case 'm': 544 MainParseArgSysInc(argvalue); 545 /* XXX: why no Var_Append? */ 546 break; 547 case 'n': 548 opts.noExecute = true; 549 Global_Append(MAKEFLAGS, "-n"); 550 break; 551 case 'q': 552 opts.query = true; 553 /* Kind of nonsensical, wot? */ 554 Global_Append(MAKEFLAGS, "-q"); 555 break; 556 case 'r': 557 opts.noBuiltins = true; 558 Global_Append(MAKEFLAGS, "-r"); 559 break; 560 case 's': 561 opts.silent = true; 562 Global_Append(MAKEFLAGS, "-s"); 563 break; 564 case 't': 565 opts.touch = true; 566 Global_Append(MAKEFLAGS, "-t"); 567 break; 568 case 'w': 569 opts.enterFlag = true; 570 Global_Append(MAKEFLAGS, "-w"); 571 break; 572 default: 573 usage(); 574 } 575 return true; 576 } 577 578 /* 579 * Parse the given arguments. Called from main() and from 580 * Main_ParseArgLine() when the .MAKEFLAGS target is used. 581 * 582 * The arguments must be treated as read-only and will be freed after the 583 * call. 584 * 585 * XXX: Deal with command line overriding .MAKEFLAGS in makefile 586 */ 587 static void 588 MainParseArgs(int argc, char **argv) 589 { 590 char c; 591 int arginc; 592 char *argvalue; 593 char *optscan; 594 bool inOption, dashDash = false; 595 596 const char *optspecs = "BC:D:I:J:NST:V:WXd:ef:ij:km:nqrstv:w"; 597 /* Can't actually use getopt(3) because rescanning is not portable */ 598 599 rearg: 600 inOption = false; 601 optscan = NULL; 602 while (argc > 1) { 603 const char *optspec; 604 if (!inOption) 605 optscan = argv[1]; 606 c = *optscan++; 607 arginc = 0; 608 if (inOption) { 609 if (c == '\0') { 610 argv++; 611 argc--; 612 inOption = false; 613 continue; 614 } 615 } else { 616 if (c != '-' || dashDash) 617 break; 618 inOption = true; 619 c = *optscan++; 620 } 621 /* '-' found at some earlier point */ 622 optspec = strchr(optspecs, c); 623 if (c != '\0' && optspec != NULL && optspec[1] == ':') { 624 /* 625 * -<something> found, and <something> should have an 626 * argument 627 */ 628 inOption = false; 629 arginc = 1; 630 argvalue = optscan; 631 if (*argvalue == '\0') { 632 if (argc < 3) 633 goto noarg; 634 argvalue = argv[2]; 635 arginc = 2; 636 } 637 } else { 638 argvalue = NULL; 639 } 640 switch (c) { 641 case '\0': 642 arginc = 1; 643 inOption = false; 644 break; 645 case '-': 646 dashDash = true; 647 break; 648 default: 649 if (!MainParseOption(c, argvalue)) 650 goto noarg; 651 } 652 argv += arginc; 653 argc -= arginc; 654 } 655 656 /* 657 * See if the rest of the arguments are variable assignments and 658 * perform them if so. Else take them to be targets and stuff them 659 * on the end of the "create" list. 660 */ 661 for (; argc > 1; argv++, argc--) { 662 if (!Parse_VarAssign(argv[1], false, SCOPE_CMDLINE)) { 663 if (argv[1][0] == '\0') 664 Punt("illegal (null) argument."); 665 if (argv[1][0] == '-' && !dashDash) 666 goto rearg; 667 Lst_Append(&opts.create, bmake_strdup(argv[1])); 668 } 669 } 670 671 return; 672 noarg: 673 (void)fprintf(stderr, "%s: option requires an argument -- %c\n", 674 progname, c); 675 usage(); 676 } 677 678 /* 679 * Break a line of arguments into words and parse them. 680 * 681 * Used when a .MFLAGS or .MAKEFLAGS target is encountered during parsing and 682 * by main() when reading the MAKEFLAGS environment variable. 683 */ 684 void 685 Main_ParseArgLine(const char *line) 686 { 687 Words words; 688 char *buf; 689 690 if (line == NULL) 691 return; 692 /* XXX: don't use line as an iterator variable */ 693 for (; *line == ' '; line++) 694 continue; 695 if (line[0] == '\0') 696 return; 697 698 { 699 FStr argv0 = Var_Value(SCOPE_GLOBAL, ".MAKE"); 700 buf = str_concat3(argv0.str, " ", line); 701 FStr_Done(&argv0); 702 } 703 704 words = Str_Words(buf, true); 705 if (words.words == NULL) { 706 Error("Unterminated quoted string [%s]", buf); 707 free(buf); 708 return; 709 } 710 free(buf); 711 MainParseArgs((int)words.len, words.words); 712 713 Words_Free(words); 714 } 715 716 bool 717 Main_SetObjdir(bool writable, const char *fmt, ...) 718 { 719 struct stat sb; 720 char *path; 721 char buf[MAXPATHLEN + 1]; 722 char buf2[MAXPATHLEN + 1]; 723 va_list ap; 724 725 va_start(ap, fmt); 726 vsnprintf(path = buf, MAXPATHLEN, fmt, ap); 727 va_end(ap); 728 729 if (path[0] != '/') { 730 if (snprintf(buf2, MAXPATHLEN, "%s/%s", curdir, path) <= MAXPATHLEN) 731 path = buf2; 732 else 733 return false; 734 } 735 736 /* look for the directory and try to chdir there */ 737 if (stat(path, &sb) != 0 || !S_ISDIR(sb.st_mode)) 738 return false; 739 740 if ((writable && access(path, W_OK) != 0) || chdir(path) != 0) { 741 (void)fprintf(stderr, "%s: warning: %s: %s.\n", 742 progname, path, strerror(errno)); 743 return false; 744 } 745 746 snprintf(objdir, sizeof objdir, "%s", path); 747 Global_Set(".OBJDIR", objdir); 748 setenv("PWD", objdir, 1); 749 Dir_InitDot(); 750 purge_relative_cached_realpaths(); 751 if (opts.enterFlag && strcmp(objdir, curdir) != 0) 752 enterFlagObj = true; 753 return true; 754 } 755 756 static bool 757 SetVarObjdir(bool writable, const char *var, const char *suffix) 758 { 759 FStr path = Var_Value(SCOPE_CMDLINE, var); 760 761 if (path.str == NULL || path.str[0] == '\0') { 762 FStr_Done(&path); 763 return false; 764 } 765 766 Var_Expand(&path, SCOPE_GLOBAL, VARE_WANTRES); 767 768 (void)Main_SetObjdir(writable, "%s%s", path.str, suffix); 769 770 FStr_Done(&path); 771 return true; 772 } 773 774 /* 775 * Splits str into words, adding them to the list. 776 * The string must be kept alive as long as the list. 777 */ 778 int 779 str2Lst_Append(StringList *lp, char *str) 780 { 781 char *cp; 782 int n; 783 784 const char *sep = " \t"; 785 786 for (n = 0, cp = strtok(str, sep); cp != NULL; cp = strtok(NULL, sep)) { 787 Lst_Append(lp, cp); 788 n++; 789 } 790 return n; 791 } 792 793 #ifdef SIGINFO 794 /*ARGSUSED*/ 795 static void 796 siginfo(int signo MAKE_ATTR_UNUSED) 797 { 798 char dir[MAXPATHLEN]; 799 char str[2 * MAXPATHLEN]; 800 int len; 801 if (getcwd(dir, sizeof dir) == NULL) 802 return; 803 len = snprintf(str, sizeof str, "%s: Working in: %s\n", progname, dir); 804 if (len > 0) 805 (void)write(STDERR_FILENO, str, (size_t)len); 806 } 807 #endif 808 809 /* Allow makefiles some control over the mode we run in. */ 810 static void 811 MakeMode(void) 812 { 813 char *mode = Var_Subst("${.MAKE.MODE:tl}", 814 SCOPE_GLOBAL, VARE_WANTRES); 815 /* TODO: handle errors */ 816 817 if (mode[0] != '\0') { 818 if (strstr(mode, "compat") != NULL) { 819 opts.compatMake = true; 820 forceJobs = false; 821 } 822 #if USE_META 823 if (strstr(mode, "meta") != NULL) 824 meta_mode_init(mode); 825 #endif 826 if (strstr(mode, "randomize-targets") != NULL) 827 opts.randomizeTargets = true; 828 } 829 830 free(mode); 831 } 832 833 static void 834 PrintVar(const char *varname, bool expandVars) 835 { 836 if (strchr(varname, '$') != NULL) { 837 char *evalue = Var_Subst(varname, SCOPE_GLOBAL, VARE_WANTRES); 838 /* TODO: handle errors */ 839 printf("%s\n", evalue); 840 free(evalue); 841 842 } else if (expandVars) { 843 char *expr = str_concat3("${", varname, "}"); 844 char *evalue = Var_Subst(expr, SCOPE_GLOBAL, VARE_WANTRES); 845 /* TODO: handle errors */ 846 free(expr); 847 printf("%s\n", evalue); 848 free(evalue); 849 850 } else { 851 FStr value = Var_Value(SCOPE_GLOBAL, varname); 852 printf("%s\n", value.str != NULL ? value.str : ""); 853 FStr_Done(&value); 854 } 855 } 856 857 /* 858 * Return a bool based on a variable. 859 * 860 * If the knob is not set, return the fallback. 861 * If set, anything that looks or smells like "No", "False", "Off", "0", etc. 862 * is false, otherwise true. 863 */ 864 bool 865 GetBooleanExpr(const char *expr, bool fallback) 866 { 867 char *value; 868 bool res; 869 870 value = Var_Subst(expr, SCOPE_GLOBAL, VARE_WANTRES); 871 /* TODO: handle errors */ 872 res = ParseBoolean(value, fallback); 873 free(value); 874 return res; 875 } 876 877 static void 878 doPrintVars(void) 879 { 880 StringListNode *ln; 881 bool expandVars; 882 883 if (opts.printVars == PVM_EXPANDED) 884 expandVars = true; 885 else if (opts.debugVflag) 886 expandVars = false; 887 else 888 expandVars = GetBooleanExpr("${.MAKE.EXPAND_VARIABLES}", 889 false); 890 891 for (ln = opts.variables.first; ln != NULL; ln = ln->next) { 892 const char *varname = ln->datum; 893 PrintVar(varname, expandVars); 894 } 895 } 896 897 static bool 898 runTargets(void) 899 { 900 GNodeList targs = LST_INIT; /* target nodes to create */ 901 bool outOfDate; /* false if all targets up to date */ 902 903 /* 904 * Have now read the entire graph and need to make a list of 905 * targets to create. If none was given on the command line, 906 * we consult the parsing module to find the main target(s) 907 * to create. 908 */ 909 if (Lst_IsEmpty(&opts.create)) 910 Parse_MainName(&targs); 911 else 912 Targ_FindList(&targs, &opts.create); 913 914 if (!opts.compatMake) { 915 /* 916 * Initialize job module before traversing the graph 917 * now that any .BEGIN and .END targets have been read. 918 * This is done only if the -q flag wasn't given 919 * (to prevent the .BEGIN from being executed should 920 * it exist). 921 */ 922 if (!opts.query) { 923 Job_Init(); 924 jobsRunning = true; 925 } 926 927 /* Traverse the graph, checking on all the targets */ 928 outOfDate = Make_Run(&targs); 929 } else { 930 Compat_MakeAll(&targs); 931 outOfDate = false; 932 } 933 Lst_Done(&targs); /* Don't free the targets themselves. */ 934 return outOfDate; 935 } 936 937 /* 938 * Set up the .TARGETS variable to contain the list of targets to be created. 939 * If none specified, make the variable empty for now, the parser will fill 940 * in the default or .MAIN target later. 941 */ 942 static void 943 InitVarTargets(void) 944 { 945 StringListNode *ln; 946 947 if (Lst_IsEmpty(&opts.create)) { 948 Global_Set(".TARGETS", ""); 949 return; 950 } 951 952 for (ln = opts.create.first; ln != NULL; ln = ln->next) { 953 const char *name = ln->datum; 954 Global_Append(".TARGETS", name); 955 } 956 } 957 958 static void 959 InitRandom(void) 960 { 961 struct timeval tv; 962 963 gettimeofday(&tv, NULL); 964 srandom((unsigned int)(tv.tv_sec + tv.tv_usec)); 965 } 966 967 static const char * 968 InitVarMachine(const struct utsname *utsname MAKE_ATTR_UNUSED) 969 { 970 const char *machine = getenv("MACHINE"); 971 if (machine != NULL) 972 return machine; 973 974 #if defined(MAKE_NATIVE) 975 return utsname->machine; 976 #elif defined(MAKE_MACHINE) 977 return MAKE_MACHINE; 978 #else 979 return "unknown"; 980 #endif 981 } 982 983 static const char * 984 InitVarMachineArch(void) 985 { 986 const char *env = getenv("MACHINE_ARCH"); 987 if (env != NULL) 988 return env; 989 990 #ifdef MAKE_NATIVE 991 { 992 struct utsname utsname; 993 static char machine_arch_buf[sizeof utsname.machine]; 994 const int mib[2] = { CTL_HW, HW_MACHINE_ARCH }; 995 size_t len = sizeof machine_arch_buf; 996 997 if (sysctl(mib, (unsigned int)__arraycount(mib), 998 machine_arch_buf, &len, NULL, 0) < 0) { 999 (void)fprintf(stderr, "%s: sysctl failed (%s).\n", 1000 progname, strerror(errno)); 1001 exit(2); 1002 } 1003 1004 return machine_arch_buf; 1005 } 1006 #elif defined(MACHINE_ARCH) 1007 return MACHINE_ARCH; 1008 #elif defined(MAKE_MACHINE_ARCH) 1009 return MAKE_MACHINE_ARCH; 1010 #else 1011 return "unknown"; 1012 #endif 1013 } 1014 1015 #ifndef NO_PWD_OVERRIDE 1016 /* 1017 * All this code is so that we know where we are when we start up 1018 * on a different machine with pmake. 1019 * 1020 * XXX: Make no longer has "local" and "remote" mode. Is this code still 1021 * necessary? 1022 * 1023 * Overriding getcwd() with $PWD totally breaks MAKEOBJDIRPREFIX 1024 * since the value of curdir can vary depending on how we got 1025 * here. Ie sitting at a shell prompt (shell that provides $PWD) 1026 * or via subdir.mk in which case its likely a shell which does 1027 * not provide it. 1028 * 1029 * So, to stop it breaking this case only, we ignore PWD if 1030 * MAKEOBJDIRPREFIX is set or MAKEOBJDIR contains a variable expression. 1031 */ 1032 static void 1033 HandlePWD(const struct stat *curdir_st) 1034 { 1035 char *pwd; 1036 FStr makeobjdir; 1037 struct stat pwd_st; 1038 1039 if (ignorePWD || (pwd = getenv("PWD")) == NULL) 1040 return; 1041 1042 if (Var_Exists(SCOPE_CMDLINE, "MAKEOBJDIRPREFIX")) 1043 return; 1044 1045 makeobjdir = Var_Value(SCOPE_CMDLINE, "MAKEOBJDIR"); 1046 if (makeobjdir.str != NULL && strchr(makeobjdir.str, '$') != NULL) 1047 goto ignore_pwd; 1048 1049 if (stat(pwd, &pwd_st) == 0 && 1050 curdir_st->st_ino == pwd_st.st_ino && 1051 curdir_st->st_dev == pwd_st.st_dev) 1052 (void)strncpy(curdir, pwd, MAXPATHLEN); 1053 1054 ignore_pwd: 1055 FStr_Done(&makeobjdir); 1056 } 1057 #endif 1058 1059 /* 1060 * Find the .OBJDIR. If MAKEOBJDIRPREFIX, or failing that, MAKEOBJDIR is set 1061 * in the environment, try only that value and fall back to .CURDIR if it 1062 * does not exist. 1063 * 1064 * Otherwise, try _PATH_OBJDIR.MACHINE-MACHINE_ARCH, _PATH_OBJDIR.MACHINE, 1065 * and finally _PATH_OBJDIRPREFIX`pwd`, in that order. If none of these 1066 * paths exist, just use .CURDIR. 1067 */ 1068 static void 1069 InitObjdir(const char *machine, const char *machine_arch) 1070 { 1071 bool writable; 1072 1073 Dir_InitCur(curdir); 1074 writable = GetBooleanExpr("${MAKE_OBJDIR_CHECK_WRITABLE}", true); 1075 (void)Main_SetObjdir(false, "%s", curdir); 1076 1077 if (!SetVarObjdir(writable, "MAKEOBJDIRPREFIX", curdir) && 1078 !SetVarObjdir(writable, "MAKEOBJDIR", "") && 1079 !Main_SetObjdir(writable, "%s.%s-%s", _PATH_OBJDIR, machine, machine_arch) && 1080 !Main_SetObjdir(writable, "%s.%s", _PATH_OBJDIR, machine) && 1081 !Main_SetObjdir(writable, "%s", _PATH_OBJDIR)) 1082 (void)Main_SetObjdir(writable, "%s%s", _PATH_OBJDIRPREFIX, curdir); 1083 } 1084 1085 /* get rid of resource limit on file descriptors */ 1086 static void 1087 UnlimitFiles(void) 1088 { 1089 #if defined(MAKE_NATIVE) || (defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE)) 1090 struct rlimit rl; 1091 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 && 1092 rl.rlim_cur != rl.rlim_max) { 1093 rl.rlim_cur = rl.rlim_max; 1094 (void)setrlimit(RLIMIT_NOFILE, &rl); 1095 } 1096 #endif 1097 } 1098 1099 static void 1100 CmdOpts_Init(void) 1101 { 1102 opts.compatMake = false; 1103 memset(&opts.debug, 0, sizeof(opts.debug)); 1104 /* opts.debug_file has already been initialized earlier */ 1105 opts.strict = false; 1106 opts.debugVflag = false; 1107 opts.checkEnvFirst = false; 1108 Lst_Init(&opts.makefiles); 1109 opts.ignoreErrors = false; /* Pay attention to non-zero returns */ 1110 opts.maxJobs = 1; 1111 opts.keepgoing = false; /* Stop on error */ 1112 opts.noRecursiveExecute = false; /* Execute all .MAKE targets */ 1113 opts.noExecute = false; /* Execute all commands */ 1114 opts.query = false; 1115 opts.noBuiltins = false; /* Read the built-in rules */ 1116 opts.silent = false; /* Print commands as executed */ 1117 opts.touch = false; 1118 opts.printVars = PVM_NONE; 1119 Lst_Init(&opts.variables); 1120 opts.parseWarnFatal = false; 1121 opts.enterFlag = false; 1122 opts.varNoExportEnv = false; 1123 Lst_Init(&opts.create); 1124 } 1125 1126 /* 1127 * Initialize MAKE and .MAKE to the path of the executable, so that it can be 1128 * found by execvp(3) and the shells, even after a chdir. 1129 * 1130 * If it's a relative path and contains a '/', resolve it to an absolute path. 1131 * Otherwise keep it as is, assuming it will be found in the PATH. 1132 */ 1133 static void 1134 InitVarMake(const char *argv0) 1135 { 1136 const char *make = argv0; 1137 1138 if (argv0[0] != '/' && strchr(argv0, '/') != NULL) { 1139 char pathbuf[MAXPATHLEN]; 1140 const char *abspath = cached_realpath(argv0, pathbuf); 1141 struct stat st; 1142 if (abspath != NULL && abspath[0] == '/' && 1143 stat(make, &st) == 0) 1144 make = abspath; 1145 } 1146 1147 Global_Set("MAKE", make); 1148 Global_Set(".MAKE", make); 1149 } 1150 1151 /* 1152 * Add the directories from the colon-separated syspath to defSysIncPath. 1153 * After returning, the contents of syspath is unspecified. 1154 */ 1155 static void 1156 InitDefSysIncPath(char *syspath) 1157 { 1158 static char defsyspath[] = _PATH_DEFSYSPATH; 1159 char *start, *cp; 1160 1161 /* 1162 * If no user-supplied system path was given (through the -m option) 1163 * add the directories from the DEFSYSPATH (more than one may be given 1164 * as dir1:...:dirn) to the system include path. 1165 */ 1166 if (syspath == NULL || syspath[0] == '\0') 1167 syspath = defsyspath; 1168 else 1169 syspath = bmake_strdup(syspath); 1170 1171 for (start = syspath; *start != '\0'; start = cp) { 1172 for (cp = start; *cp != '\0' && *cp != ':'; cp++) 1173 continue; 1174 if (*cp == ':') 1175 *cp++ = '\0'; 1176 1177 /* look for magic parent directory search string */ 1178 if (strncmp(start, ".../", 4) == 0) { 1179 char *dir = Dir_FindHereOrAbove(curdir, start + 4); 1180 if (dir != NULL) { 1181 (void)SearchPath_Add(defSysIncPath, dir); 1182 free(dir); 1183 } 1184 } else { 1185 (void)SearchPath_Add(defSysIncPath, start); 1186 } 1187 } 1188 1189 if (syspath != defsyspath) 1190 free(syspath); 1191 } 1192 1193 static void 1194 ReadBuiltinRules(void) 1195 { 1196 StringListNode *ln; 1197 StringList sysMkFiles = LST_INIT; 1198 1199 SearchPath_Expand( 1200 Lst_IsEmpty(&sysIncPath->dirs) ? defSysIncPath : sysIncPath, 1201 _PATH_DEFSYSMK, 1202 &sysMkFiles); 1203 if (Lst_IsEmpty(&sysMkFiles)) 1204 Fatal("%s: no system rules (%s).", progname, _PATH_DEFSYSMK); 1205 1206 for (ln = sysMkFiles.first; ln != NULL; ln = ln->next) 1207 if (ReadMakefile(ln->datum)) 1208 break; 1209 1210 if (ln == NULL) 1211 Fatal("%s: cannot open %s.", 1212 progname, (const char *)sysMkFiles.first->datum); 1213 1214 Lst_DoneCall(&sysMkFiles, free); 1215 } 1216 1217 static void 1218 InitMaxJobs(void) 1219 { 1220 char *value; 1221 int n; 1222 1223 if (forceJobs || opts.compatMake || 1224 !Var_Exists(SCOPE_GLOBAL, ".MAKE.JOBS")) 1225 return; 1226 1227 value = Var_Subst("${.MAKE.JOBS}", SCOPE_GLOBAL, VARE_WANTRES); 1228 /* TODO: handle errors */ 1229 n = (int)strtol(value, NULL, 0); 1230 if (n < 1) { 1231 (void)fprintf(stderr, 1232 "%s: illegal value for .MAKE.JOBS " 1233 "-- must be positive integer!\n", 1234 progname); 1235 exit(2); /* Not 1 so -q can distinguish error */ 1236 } 1237 1238 if (n != opts.maxJobs) { 1239 Global_Append(MAKEFLAGS, "-j"); 1240 Global_Append(MAKEFLAGS, value); 1241 } 1242 1243 opts.maxJobs = n; 1244 maxJobTokens = opts.maxJobs; 1245 forceJobs = true; 1246 free(value); 1247 } 1248 1249 /* 1250 * For compatibility, look at the directories in the VPATH variable 1251 * and add them to the search path, if the variable is defined. The 1252 * variable's value is in the same format as the PATH environment 1253 * variable, i.e. <directory>:<directory>:<directory>... 1254 */ 1255 static void 1256 InitVpath(void) 1257 { 1258 char *vpath, savec, *path; 1259 if (!Var_Exists(SCOPE_CMDLINE, "VPATH")) 1260 return; 1261 1262 vpath = Var_Subst("${VPATH}", SCOPE_CMDLINE, VARE_WANTRES); 1263 /* TODO: handle errors */ 1264 path = vpath; 1265 do { 1266 char *cp; 1267 /* skip to end of directory */ 1268 for (cp = path; *cp != ':' && *cp != '\0'; cp++) 1269 continue; 1270 /* Save terminator character so know when to stop */ 1271 savec = *cp; 1272 *cp = '\0'; 1273 /* Add directory to search path */ 1274 (void)SearchPath_Add(&dirSearchPath, path); 1275 *cp = savec; 1276 path = cp + 1; 1277 } while (savec == ':'); 1278 free(vpath); 1279 } 1280 1281 static void 1282 ReadAllMakefiles(const StringList *makefiles) 1283 { 1284 StringListNode *ln; 1285 1286 for (ln = makefiles->first; ln != NULL; ln = ln->next) { 1287 const char *fname = ln->datum; 1288 if (!ReadMakefile(fname)) 1289 Fatal("%s: cannot open %s.", progname, fname); 1290 } 1291 } 1292 1293 static void 1294 ReadFirstDefaultMakefile(void) 1295 { 1296 StringList makefiles = LST_INIT; 1297 StringListNode *ln; 1298 char *prefs = Var_Subst("${.MAKE.MAKEFILE_PREFERENCE}", 1299 SCOPE_CMDLINE, VARE_WANTRES); 1300 /* TODO: handle errors */ 1301 1302 (void)str2Lst_Append(&makefiles, prefs); 1303 1304 for (ln = makefiles.first; ln != NULL; ln = ln->next) 1305 if (ReadMakefile(ln->datum)) 1306 break; 1307 1308 Lst_Done(&makefiles); 1309 free(prefs); 1310 } 1311 1312 /* 1313 * Initialize variables such as MAKE, MACHINE, .MAKEFLAGS. 1314 * Initialize a few modules. 1315 * Parse the arguments from MAKEFLAGS and the command line. 1316 */ 1317 static void 1318 main_Init(int argc, char **argv) 1319 { 1320 struct stat sa; 1321 const char *machine; 1322 const char *machine_arch; 1323 char *syspath = getenv("MAKESYSPATH"); 1324 struct utsname utsname; 1325 1326 /* default to writing debug to stderr */ 1327 opts.debug_file = stderr; 1328 1329 Str_Intern_Init(); 1330 HashTable_Init(&cached_realpaths); 1331 1332 #ifdef SIGINFO 1333 (void)bmake_signal(SIGINFO, siginfo); 1334 #endif 1335 1336 InitRandom(); 1337 1338 progname = str_basename(argv[0]); 1339 1340 UnlimitFiles(); 1341 1342 if (uname(&utsname) == -1) { 1343 (void)fprintf(stderr, "%s: uname failed (%s).\n", progname, 1344 strerror(errno)); 1345 exit(2); 1346 } 1347 1348 /* 1349 * Get the name of this type of MACHINE from utsname 1350 * so we can share an executable for similar machines. 1351 * (i.e. m68k: amiga hp300, mac68k, sun3, ...) 1352 * 1353 * Note that both MACHINE and MACHINE_ARCH are decided at 1354 * run-time. 1355 */ 1356 machine = InitVarMachine(&utsname); 1357 machine_arch = InitVarMachineArch(); 1358 1359 myPid = getpid(); /* remember this for vFork() */ 1360 1361 /* 1362 * Just in case MAKEOBJDIR wants us to do something tricky. 1363 */ 1364 Targ_Init(); 1365 Var_Init(); 1366 Global_Set_ReadOnly(".MAKE.OS", utsname.sysname); 1367 Global_Set("MACHINE", machine); 1368 Global_Set("MACHINE_ARCH", machine_arch); 1369 #ifdef MAKE_VERSION 1370 Global_Set("MAKE_VERSION", MAKE_VERSION); 1371 #endif 1372 Global_Set_ReadOnly(".newline", "\n"); /* handy for :@ loops */ 1373 #ifndef MAKEFILE_PREFERENCE_LIST 1374 /* This is the traditional preference for makefiles. */ 1375 # define MAKEFILE_PREFERENCE_LIST "makefile Makefile" 1376 #endif 1377 Global_Set(".MAKE.MAKEFILE_PREFERENCE", MAKEFILE_PREFERENCE_LIST); 1378 Global_Set(".MAKE.DEPENDFILE", ".depend"); 1379 /* Tell makefiles like jobs.mk wether we support -jC */ 1380 #ifdef _SC_NPROCESSORS_ONLN 1381 Global_Set_ReadOnly(".MAKE.JOBS.C", "yes"); 1382 #else 1383 Global_Set_ReadOnly(".MAKE.JOBS.C", "no"); 1384 #endif 1385 1386 CmdOpts_Init(); 1387 allPrecious = false; /* Remove targets when interrupted */ 1388 deleteOnError = false; /* Historical default behavior */ 1389 jobsRunning = false; 1390 1391 maxJobTokens = opts.maxJobs; 1392 ignorePWD = false; 1393 1394 /* 1395 * Initialize the parsing, directory and variable modules to prepare 1396 * for the reading of inclusion paths and variable settings on the 1397 * command line 1398 */ 1399 1400 /* 1401 * Initialize various variables. 1402 * MAKE also gets this name, for compatibility 1403 * .MAKEFLAGS gets set to the empty string just in case. 1404 * MFLAGS also gets initialized empty, for compatibility. 1405 */ 1406 Parse_Init(); 1407 InitVarMake(argv[0]); 1408 Global_Set(MAKEFLAGS, ""); 1409 Global_Set(".MAKEOVERRIDES", ""); 1410 Global_Set("MFLAGS", ""); 1411 Global_Set(".ALLTARGETS", ""); 1412 Var_Set(SCOPE_CMDLINE, ".MAKE.LEVEL.ENV", MAKE_LEVEL_ENV); 1413 1414 /* Set some other useful variables. */ 1415 { 1416 char buf[64], *ep = getenv(MAKE_LEVEL_ENV); 1417 1418 makelevel = ep != NULL && ep[0] != '\0' ? atoi(ep) : 0; 1419 if (makelevel < 0) 1420 makelevel = 0; 1421 snprintf(buf, sizeof buf, "%d", makelevel); 1422 Global_Set(".MAKE.LEVEL", buf); 1423 snprintf(buf, sizeof buf, "%u", myPid); 1424 Global_Set_ReadOnly(".MAKE.PID", buf); 1425 snprintf(buf, sizeof buf, "%u", getppid()); 1426 Global_Set_ReadOnly(".MAKE.PPID", buf); 1427 snprintf(buf, sizeof buf, "%u", getuid()); 1428 Global_Set_ReadOnly(".MAKE.UID", buf); 1429 snprintf(buf, sizeof buf, "%u", getgid()); 1430 Global_Set_ReadOnly(".MAKE.GID", buf); 1431 } 1432 if (makelevel > 0) { 1433 char pn[1024]; 1434 snprintf(pn, sizeof pn, "%s[%d]", progname, makelevel); 1435 progname = bmake_strdup(pn); 1436 } 1437 1438 #ifdef USE_META 1439 meta_init(); 1440 #endif 1441 Dir_Init(); 1442 1443 #ifdef POSIX 1444 { 1445 char *makeflags = explode(getenv("MAKEFLAGS")); 1446 Main_ParseArgLine(makeflags); 1447 free(makeflags); 1448 } 1449 #else 1450 /* 1451 * First snag any flags out of the MAKE environment variable. 1452 * (Note this is *not* MAKEFLAGS since /bin/make uses that and it's 1453 * in a different format). 1454 */ 1455 Main_ParseArgLine(getenv("MAKE")); 1456 #endif 1457 1458 if (getcwd(curdir, MAXPATHLEN) == NULL) { 1459 (void)fprintf(stderr, "%s: getcwd: %s.\n", 1460 progname, strerror(errno)); 1461 exit(2); 1462 } 1463 1464 MainParseArgs(argc, argv); 1465 1466 if (opts.enterFlag) 1467 printf("%s: Entering directory `%s'\n", progname, curdir); 1468 1469 if (stat(curdir, &sa) == -1) { 1470 (void)fprintf(stderr, "%s: %s: %s.\n", 1471 progname, curdir, strerror(errno)); 1472 exit(2); 1473 } 1474 1475 #ifndef NO_PWD_OVERRIDE 1476 HandlePWD(&sa); 1477 #endif 1478 Global_Set(".CURDIR", curdir); 1479 1480 InitObjdir(machine, machine_arch); 1481 1482 Arch_Init(); 1483 Suff_Init(); 1484 Trace_Init(tracefile); 1485 1486 defaultNode = NULL; 1487 (void)time(&now); 1488 1489 Trace_Log(MAKESTART, NULL); 1490 1491 InitVarTargets(); 1492 1493 InitDefSysIncPath(syspath); 1494 } 1495 1496 /* 1497 * Read the system makefile followed by either makefile, Makefile or the 1498 * files given by the -f option. Exit on parse errors. 1499 */ 1500 static void 1501 main_ReadFiles(void) 1502 { 1503 1504 if (Lst_IsEmpty(&sysIncPath->dirs)) 1505 SearchPath_AddAll(sysIncPath, defSysIncPath); 1506 1507 Dir_SetSYSPATH(); 1508 if (!opts.noBuiltins) 1509 ReadBuiltinRules(); 1510 1511 posix_state = PS_MAYBE_NEXT_LINE; 1512 if (!Lst_IsEmpty(&opts.makefiles)) 1513 ReadAllMakefiles(&opts.makefiles); 1514 else 1515 ReadFirstDefaultMakefile(); 1516 } 1517 1518 /* Compute the dependency graph. */ 1519 static void 1520 main_PrepareMaking(void) 1521 { 1522 /* In particular suppress .depend for '-r -V .OBJDIR -f /dev/null' */ 1523 if (!opts.noBuiltins || opts.printVars == PVM_NONE) { 1524 makeDependfile = Var_Subst("${.MAKE.DEPENDFILE}", 1525 SCOPE_CMDLINE, VARE_WANTRES); 1526 if (makeDependfile[0] != '\0') { 1527 /* TODO: handle errors */ 1528 doing_depend = true; 1529 (void)ReadMakefile(makeDependfile); 1530 doing_depend = false; 1531 } 1532 } 1533 1534 if (enterFlagObj) 1535 printf("%s: Entering directory `%s'\n", progname, objdir); 1536 1537 MakeMode(); 1538 1539 { 1540 FStr makeflags = Var_Value(SCOPE_GLOBAL, MAKEFLAGS); 1541 Global_Append("MFLAGS", makeflags.str); 1542 FStr_Done(&makeflags); 1543 } 1544 1545 InitMaxJobs(); 1546 1547 if (!opts.compatMake && !forceJobs) 1548 opts.compatMake = true; 1549 1550 if (!opts.compatMake) 1551 Job_ServerStart(maxJobTokens, jp_0, jp_1); 1552 DEBUG5(JOB, "job_pipe %d %d, maxjobs %d, tokens %d, compat %d\n", 1553 jp_0, jp_1, opts.maxJobs, maxJobTokens, opts.compatMake ? 1 : 0); 1554 1555 if (opts.printVars == PVM_NONE) 1556 Main_ExportMAKEFLAGS(true); /* initial export */ 1557 1558 InitVpath(); 1559 1560 /* 1561 * Now that all search paths have been read for suffixes et al, it's 1562 * time to add the default search path to their lists... 1563 */ 1564 Suff_ExtendPaths(); 1565 1566 /* 1567 * Propagate attributes through :: dependency lists. 1568 */ 1569 Targ_Propagate(); 1570 1571 /* print the initial graph, if the user requested it */ 1572 if (DEBUG(GRAPH1)) 1573 Targ_PrintGraph(1); 1574 } 1575 1576 /* 1577 * Make the targets. 1578 * If the -v or -V options are given, print variables instead. 1579 * Return whether any of the targets is out-of-date. 1580 */ 1581 static bool 1582 main_Run(void) 1583 { 1584 if (opts.printVars != PVM_NONE) { 1585 /* print the values of any variables requested by the user */ 1586 doPrintVars(); 1587 return false; 1588 } else { 1589 return runTargets(); 1590 } 1591 } 1592 1593 /* Clean up after making the targets. */ 1594 static void 1595 main_CleanUp(void) 1596 { 1597 #ifdef CLEANUP 1598 Lst_DoneCall(&opts.variables, free); 1599 Lst_DoneCall(&opts.makefiles, free); 1600 Lst_DoneCall(&opts.create, free); 1601 #endif 1602 1603 if (DEBUG(GRAPH2)) 1604 Targ_PrintGraph(2); 1605 1606 Trace_Log(MAKEEND, NULL); 1607 1608 if (enterFlagObj) 1609 printf("%s: Leaving directory `%s'\n", progname, objdir); 1610 if (opts.enterFlag) 1611 printf("%s: Leaving directory `%s'\n", progname, curdir); 1612 1613 #ifdef USE_META 1614 meta_finish(); 1615 #endif 1616 Suff_End(); 1617 Targ_End(); 1618 Arch_End(); 1619 Var_End(); 1620 Parse_End(); 1621 Dir_End(); 1622 Job_End(); 1623 Trace_End(); 1624 Str_Intern_End(); 1625 } 1626 1627 /* Determine the exit code. */ 1628 static int 1629 main_Exit(bool outOfDate) 1630 { 1631 if (opts.strict && (main_errors > 0 || Parse_NumErrors() > 0)) 1632 return 2; /* Not 1 so -q can distinguish error */ 1633 return outOfDate ? 1 : 0; 1634 } 1635 1636 int 1637 main(int argc, char **argv) 1638 { 1639 bool outOfDate; 1640 1641 main_Init(argc, argv); 1642 main_ReadFiles(); 1643 main_PrepareMaking(); 1644 outOfDate = main_Run(); 1645 main_CleanUp(); 1646 return main_Exit(outOfDate); 1647 } 1648 1649 /* 1650 * Open and parse the given makefile, with all its side effects. 1651 * Return false if the file could not be opened. 1652 */ 1653 static bool 1654 ReadMakefile(const char *fname) 1655 { 1656 int fd; 1657 char *name, *path = NULL; 1658 1659 if (strcmp(fname, "-") == 0) { 1660 Parse_File("(stdin)", -1); 1661 Var_Set(SCOPE_INTERNAL, "MAKEFILE", ""); 1662 } else { 1663 /* if we've chdir'd, rebuild the path name */ 1664 if (strcmp(curdir, objdir) != 0 && *fname != '/') { 1665 path = str_concat3(curdir, "/", fname); 1666 fd = open(path, O_RDONLY); 1667 if (fd != -1) { 1668 fname = path; 1669 goto found; 1670 } 1671 free(path); 1672 1673 /* If curdir failed, try objdir (ala .depend) */ 1674 path = str_concat3(objdir, "/", fname); 1675 fd = open(path, O_RDONLY); 1676 if (fd != -1) { 1677 fname = path; 1678 goto found; 1679 } 1680 } else { 1681 fd = open(fname, O_RDONLY); 1682 if (fd != -1) 1683 goto found; 1684 } 1685 /* look in -I and system include directories. */ 1686 name = Dir_FindFile(fname, parseIncPath); 1687 if (name == NULL) { 1688 SearchPath *sysInc = Lst_IsEmpty(&sysIncPath->dirs) 1689 ? defSysIncPath : sysIncPath; 1690 name = Dir_FindFile(fname, sysInc); 1691 } 1692 if (name == NULL || (fd = open(name, O_RDONLY)) == -1) { 1693 free(name); 1694 free(path); 1695 return false; 1696 } 1697 fname = name; 1698 /* 1699 * set the MAKEFILE variable desired by System V fans -- the 1700 * placement of the setting here means it gets set to the last 1701 * makefile specified, as it is set by SysV make. 1702 */ 1703 found: 1704 if (!doing_depend) 1705 Var_Set(SCOPE_INTERNAL, "MAKEFILE", fname); 1706 Parse_File(fname, fd); 1707 } 1708 free(path); 1709 return true; 1710 } 1711 1712 /* 1713 * Execute the command in cmd, and return its output (only stdout, not 1714 * stderr, possibly empty). In the output, replace newlines with spaces. 1715 */ 1716 char * 1717 Cmd_Exec(const char *cmd, char **error) 1718 { 1719 const char *args[4]; /* Arguments for invoking the shell */ 1720 int pipefds[2]; 1721 int cpid; /* Child PID */ 1722 int pid; /* PID from wait() */ 1723 int status; /* command exit status */ 1724 Buffer buf; /* buffer to store the result */ 1725 ssize_t bytes_read; 1726 char *output; 1727 char *cp; 1728 int saved_errno; 1729 1730 if (shellName == NULL) 1731 Shell_Init(); 1732 1733 args[0] = shellName; 1734 args[1] = "-c"; 1735 args[2] = cmd; 1736 args[3] = NULL; 1737 DEBUG1(VAR, "Capturing the output of command \"%s\"\n", cmd); 1738 1739 if (pipe(pipefds) == -1) { 1740 *error = str_concat3( 1741 "Couldn't create pipe for \"", cmd, "\""); 1742 return bmake_strdup(""); 1743 } 1744 1745 Var_ReexportVars(); 1746 1747 switch (cpid = vfork()) { 1748 case 0: 1749 (void)close(pipefds[0]); 1750 (void)dup2(pipefds[1], STDOUT_FILENO); 1751 (void)close(pipefds[1]); 1752 1753 (void)execv(shellPath, UNCONST(args)); 1754 _exit(1); 1755 /* NOTREACHED */ 1756 1757 case -1: 1758 *error = str_concat3("Couldn't exec \"", cmd, "\""); 1759 return bmake_strdup(""); 1760 } 1761 1762 (void)close(pipefds[1]); /* No need for the writing half */ 1763 1764 saved_errno = 0; 1765 Buf_Init(&buf); 1766 1767 do { 1768 char result[BUFSIZ]; 1769 bytes_read = read(pipefds[0], result, sizeof result); 1770 if (bytes_read > 0) 1771 Buf_AddBytes(&buf, result, (size_t)bytes_read); 1772 } while (bytes_read > 0 || (bytes_read == -1 && errno == EINTR)); 1773 if (bytes_read == -1) 1774 saved_errno = errno; 1775 1776 (void)close(pipefds[0]); /* Close the input side of the pipe. */ 1777 1778 while ((pid = waitpid(cpid, &status, 0)) != cpid && pid >= 0) 1779 JobReapChild(pid, status, false); 1780 1781 if (Buf_EndsWith(&buf, '\n')) 1782 buf.data[buf.len - 1] = '\0'; 1783 1784 output = Buf_DoneData(&buf); 1785 for (cp = output; *cp != '\0'; cp++) 1786 if (*cp == '\n') 1787 *cp = ' '; 1788 1789 if (WIFSIGNALED(status)) 1790 *error = str_concat3("\"", cmd, "\" exited on a signal"); 1791 else if (WEXITSTATUS(status) != 0) 1792 *error = str_concat3( 1793 "\"", cmd, "\" returned non-zero status"); 1794 else if (saved_errno != 0) 1795 *error = str_concat3( 1796 "Couldn't read shell's output for \"", cmd, "\""); 1797 else 1798 *error = NULL; 1799 return output; 1800 } 1801 1802 /* 1803 * Print a printf-style error message. 1804 * 1805 * In default mode, this error message has no consequences, for compatibility 1806 * reasons, in particular it does not affect the exit status. Only in lint 1807 * mode (-dL) it does. 1808 */ 1809 void 1810 Error(const char *fmt, ...) 1811 { 1812 va_list ap; 1813 FILE *f; 1814 1815 f = opts.debug_file; 1816 if (f == stdout) 1817 f = stderr; 1818 (void)fflush(stdout); 1819 1820 for (;;) { 1821 fprintf(f, "%s: ", progname); 1822 va_start(ap, fmt); 1823 (void)vfprintf(f, fmt, ap); 1824 va_end(ap); 1825 (void)fprintf(f, "\n"); 1826 (void)fflush(f); 1827 if (f == stderr) 1828 break; 1829 f = stderr; 1830 } 1831 main_errors++; 1832 } 1833 1834 /* 1835 * Wait for any running jobs to finish, then produce an error message, 1836 * finally exit immediately. 1837 * 1838 * Exiting immediately differs from Parse_Error, which exits only after the 1839 * current top-level makefile has been parsed completely. 1840 */ 1841 void 1842 Fatal(const char *fmt, ...) 1843 { 1844 va_list ap; 1845 1846 if (jobsRunning) 1847 Job_Wait(); 1848 1849 (void)fflush(stdout); 1850 va_start(ap, fmt); 1851 (void)vfprintf(stderr, fmt, ap); 1852 va_end(ap); 1853 (void)fprintf(stderr, "\n"); 1854 (void)fflush(stderr); 1855 PrintStackTrace(true); 1856 1857 PrintOnError(NULL, "\n"); 1858 1859 if (DEBUG(GRAPH2) || DEBUG(GRAPH3)) 1860 Targ_PrintGraph(2); 1861 Trace_Log(MAKEERROR, NULL); 1862 exit(2); /* Not 1 so -q can distinguish error */ 1863 } 1864 1865 /* 1866 * Major exception once jobs are being created. 1867 * Kills all jobs, prints a message and exits. 1868 */ 1869 void 1870 Punt(const char *fmt, ...) 1871 { 1872 va_list ap; 1873 1874 (void)fflush(stdout); 1875 (void)fprintf(stderr, "%s: ", progname); 1876 va_start(ap, fmt); 1877 (void)vfprintf(stderr, fmt, ap); 1878 va_end(ap); 1879 (void)fprintf(stderr, "\n"); 1880 (void)fflush(stderr); 1881 1882 PrintOnError(NULL, "\n"); 1883 1884 DieHorribly(); 1885 } 1886 1887 /* Exit without giving a message. */ 1888 void 1889 DieHorribly(void) 1890 { 1891 if (jobsRunning) 1892 Job_AbortAll(); 1893 if (DEBUG(GRAPH2)) 1894 Targ_PrintGraph(2); 1895 Trace_Log(MAKEERROR, NULL); 1896 exit(2); /* Not 1 so -q can distinguish error */ 1897 } 1898 1899 /* 1900 * Called when aborting due to errors in child shell to signal abnormal exit. 1901 * The program exits. 1902 * Errors is the number of errors encountered in Make_Make. 1903 */ 1904 void 1905 Finish(int errs) 1906 { 1907 if (shouldDieQuietly(NULL, -1)) 1908 exit(2); 1909 Fatal("%d error%s", errs, errs == 1 ? "" : "s"); 1910 } 1911 1912 int 1913 unlink_file(const char *file) 1914 { 1915 struct stat st; 1916 1917 if (lstat(file, &st) == -1) 1918 return -1; 1919 1920 if (S_ISDIR(st.st_mode)) { 1921 /* 1922 * POSIX says for unlink: "The path argument shall not name 1923 * a directory unless [...]". 1924 */ 1925 errno = EISDIR; 1926 return -1; 1927 } 1928 return unlink(file); 1929 } 1930 1931 static void 1932 write_all(int fd, const void *data, size_t n) 1933 { 1934 const char *mem = data; 1935 1936 while (n > 0) { 1937 ssize_t written = write(fd, mem, n); 1938 /* XXX: Should this EAGAIN be EINTR? */ 1939 if (written == -1 && errno == EAGAIN) 1940 continue; 1941 if (written == -1) 1942 break; 1943 mem += written; 1944 n -= (size_t)written; 1945 } 1946 } 1947 1948 /* Print why exec failed, avoiding stdio. */ 1949 void MAKE_ATTR_DEAD 1950 execDie(const char *af, const char *av) 1951 { 1952 Buffer buf; 1953 1954 Buf_Init(&buf); 1955 Buf_AddStr(&buf, progname); 1956 Buf_AddStr(&buf, ": "); 1957 Buf_AddStr(&buf, af); 1958 Buf_AddStr(&buf, "("); 1959 Buf_AddStr(&buf, av); 1960 Buf_AddStr(&buf, ") failed ("); 1961 Buf_AddStr(&buf, strerror(errno)); 1962 Buf_AddStr(&buf, ")\n"); 1963 1964 write_all(STDERR_FILENO, buf.data, buf.len); 1965 1966 Buf_Done(&buf); 1967 _exit(1); 1968 } 1969 1970 static void 1971 purge_relative_cached_realpaths(void) 1972 { 1973 HashEntry *he, *nhe; 1974 HashIter hi; 1975 1976 HashIter_Init(&hi, &cached_realpaths); 1977 he = HashIter_Next(&hi); 1978 while (he != NULL) { 1979 nhe = HashIter_Next(&hi); 1980 if (he->key[0] != '/') { 1981 DEBUG1(DIR, "cached_realpath: purging %s\n", he->key); 1982 HashTable_DeleteEntry(&cached_realpaths, he); 1983 /* 1984 * XXX: What about the allocated he->value? Either 1985 * free them or document why they cannot be freed. 1986 */ 1987 } 1988 he = nhe; 1989 } 1990 } 1991 1992 const char * 1993 cached_realpath(const char *pathname, char *resolved) 1994 { 1995 const char *rp; 1996 1997 if (pathname == NULL || pathname[0] == '\0') 1998 return NULL; 1999 2000 rp = HashTable_FindValue(&cached_realpaths, pathname); 2001 if (rp != NULL) { 2002 /* a hit */ 2003 strncpy(resolved, rp, MAXPATHLEN); 2004 resolved[MAXPATHLEN - 1] = '\0'; 2005 return resolved; 2006 } 2007 2008 rp = realpath(pathname, resolved); 2009 if (rp != NULL) { 2010 HashTable_Set(&cached_realpaths, pathname, bmake_strdup(rp)); 2011 DEBUG2(DIR, "cached_realpath: %s -> %s\n", pathname, rp); 2012 return resolved; 2013 } 2014 2015 /* should we negative-cache? */ 2016 return NULL; 2017 } 2018 2019 /* 2020 * Return true if we should die without noise. 2021 * For example our failing child was a sub-make or failure happened elsewhere. 2022 */ 2023 bool 2024 shouldDieQuietly(GNode *gn, int bf) 2025 { 2026 static int quietly = -1; 2027 2028 if (quietly < 0) { 2029 if (DEBUG(JOB) || 2030 !GetBooleanExpr("${.MAKE.DIE_QUIETLY}", true)) 2031 quietly = 0; 2032 else if (bf >= 0) 2033 quietly = bf; 2034 else 2035 quietly = (gn != NULL && (gn->type & OP_MAKE)) ? 1 : 0; 2036 } 2037 return quietly != 0; 2038 } 2039 2040 static void 2041 SetErrorVars(GNode *gn) 2042 { 2043 StringListNode *ln; 2044 2045 /* 2046 * We can print this even if there is no .ERROR target. 2047 */ 2048 Global_Set(".ERROR_TARGET", gn->name); 2049 Global_Delete(".ERROR_CMD"); 2050 2051 for (ln = gn->commands.first; ln != NULL; ln = ln->next) { 2052 const char *cmd = ln->datum; 2053 2054 if (cmd == NULL) 2055 break; 2056 Global_Append(".ERROR_CMD", cmd); 2057 } 2058 } 2059 2060 /* 2061 * Print some helpful information in case of an error. 2062 * The caller should exit soon after calling this function. 2063 */ 2064 void 2065 PrintOnError(GNode *gn, const char *msg) 2066 { 2067 static GNode *errorNode = NULL; 2068 2069 if (DEBUG(HASH)) { 2070 Targ_Stats(); 2071 Var_Stats(); 2072 } 2073 2074 if (errorNode != NULL) 2075 return; /* we've been here! */ 2076 2077 printf("%s%s: stopped in %s\n", msg, progname, curdir); 2078 2079 /* we generally want to keep quiet if a sub-make died */ 2080 if (shouldDieQuietly(gn, -1)) 2081 return; 2082 2083 if (gn != NULL) 2084 SetErrorVars(gn); 2085 2086 { 2087 char *errorVarsValues = Var_Subst( 2088 "${MAKE_PRINT_VAR_ON_ERROR:@v@$v='${$v}'\n@}", 2089 SCOPE_GLOBAL, VARE_WANTRES); 2090 /* TODO: handle errors */ 2091 printf("%s", errorVarsValues); 2092 free(errorVarsValues); 2093 } 2094 2095 fflush(stdout); 2096 2097 /* 2098 * Finally, see if there is a .ERROR target, and run it if so. 2099 */ 2100 errorNode = Targ_FindNode(".ERROR"); 2101 if (errorNode != NULL) { 2102 errorNode->type |= OP_SPECIAL; 2103 Compat_Make(errorNode, errorNode); 2104 } 2105 } 2106 2107 void 2108 Main_ExportMAKEFLAGS(bool first) 2109 { 2110 static bool once = true; 2111 char *flags; 2112 2113 if (once != first) 2114 return; 2115 once = false; 2116 2117 flags = Var_Subst( 2118 "${.MAKEFLAGS} ${.MAKEOVERRIDES:O:u:@v@$v=${$v:Q}@}", 2119 SCOPE_CMDLINE, VARE_WANTRES); 2120 /* TODO: handle errors */ 2121 if (flags[0] != '\0') { 2122 #ifdef POSIX 2123 setenv("MAKEFLAGS", flags, 1); 2124 #else 2125 setenv("MAKE", flags, 1); 2126 #endif 2127 } 2128 } 2129 2130 char * 2131 getTmpdir(void) 2132 { 2133 static char *tmpdir = NULL; 2134 struct stat st; 2135 2136 if (tmpdir != NULL) 2137 return tmpdir; 2138 2139 /* Honor $TMPDIR if it is valid, strip a trailing '/'. */ 2140 tmpdir = Var_Subst("${TMPDIR:tA:U" _PATH_TMP ":S,/$,,W}/", 2141 SCOPE_GLOBAL, VARE_WANTRES); 2142 /* TODO: handle errors */ 2143 2144 if (stat(tmpdir, &st) < 0 || !S_ISDIR(st.st_mode)) { 2145 free(tmpdir); 2146 tmpdir = bmake_strdup(_PATH_TMP); 2147 } 2148 return tmpdir; 2149 } 2150 2151 /* 2152 * Create and open a temp file using "pattern". 2153 * If out_fname is provided, set it to a copy of the filename created. 2154 * Otherwise unlink the file once open. 2155 */ 2156 int 2157 mkTempFile(const char *pattern, char *tfile, size_t tfile_sz) 2158 { 2159 static char *tmpdir = NULL; 2160 char tbuf[MAXPATHLEN]; 2161 int fd; 2162 2163 if (pattern == NULL) 2164 pattern = TMPPAT; 2165 if (tmpdir == NULL) 2166 tmpdir = getTmpdir(); 2167 if (tfile == NULL) { 2168 tfile = tbuf; 2169 tfile_sz = sizeof tbuf; 2170 } 2171 2172 if (pattern[0] == '/') 2173 snprintf(tfile, tfile_sz, "%s", pattern); 2174 else 2175 snprintf(tfile, tfile_sz, "%s%s", tmpdir, pattern); 2176 2177 if ((fd = mkstemp(tfile)) < 0) 2178 Punt("Could not create temporary file %s: %s", tfile, 2179 strerror(errno)); 2180 if (tfile == tbuf) 2181 unlink(tfile); /* we just want the descriptor */ 2182 2183 return fd; 2184 } 2185 2186 /* 2187 * Convert a string representation of a boolean into a boolean value. 2188 * Anything that looks like "No", "False", "Off", "0" etc. is false, 2189 * the empty string is the fallback, everything else is true. 2190 */ 2191 bool 2192 ParseBoolean(const char *s, bool fallback) 2193 { 2194 char ch = ch_tolower(s[0]); 2195 if (ch == '\0') 2196 return fallback; 2197 if (ch == '0' || ch == 'f' || ch == 'n') 2198 return false; 2199 if (ch == 'o') 2200 return ch_tolower(s[1]) != 'f'; 2201 return true; 2202 } 2203
Indexes created Tue Sep 23 02:09:52 GMT 2025