main.c revision 1.556
1 /* $NetBSD: main.c,v 1.556 2021/12/27 23:06:19 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 1.556 2021/12/27 23:06:19 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 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 debug_setbuf; 318 default: 319 (void)fprintf(stderr, 320 "%s: illegal argument to d option -- %c\n", 321 progname, *modules); 322 usage(); 323 } 324 } 325 326 debug_setbuf: 327 opts.debug = debug; 328 329 /* 330 * Make the debug_file unbuffered, and make 331 * stdout line buffered (unless debugfile == stdout). 332 */ 333 setvbuf(opts.debug_file, NULL, _IONBF, 0); 334 if (opts.debug_file != stdout) { 335 setvbuf(stdout, NULL, _IOLBF, 0); 336 } 337 } 338 339 /* Is path relative, or does it contain any relative component "." or ".."? */ 340 static bool 341 IsRelativePath(const char *path) 342 { 343 const char *p; 344 345 if (path[0] != '/') 346 return true; 347 p = path; 348 while ((p = strstr(p, "/.")) != NULL) { 349 p += 2; 350 if (*p == '.') 351 p++; 352 if (*p == '/' || *p == '\0') 353 return true; 354 } 355 return false; 356 } 357 358 static void 359 MainParseArgChdir(const char *argvalue) 360 { 361 struct stat sa, sb; 362 363 if (chdir(argvalue) == -1) { 364 (void)fprintf(stderr, "%s: chdir %s: %s\n", 365 progname, argvalue, strerror(errno)); 366 exit(2); /* Not 1 so -q can distinguish error */ 367 } 368 if (getcwd(curdir, MAXPATHLEN) == NULL) { 369 (void)fprintf(stderr, "%s: %s.\n", progname, strerror(errno)); 370 exit(2); 371 } 372 if (!IsRelativePath(argvalue) && 373 stat(argvalue, &sa) != -1 && 374 stat(curdir, &sb) != -1 && 375 sa.st_ino == sb.st_ino && 376 sa.st_dev == sb.st_dev) 377 strncpy(curdir, argvalue, MAXPATHLEN); 378 ignorePWD = true; 379 } 380 381 static void 382 MainParseArgJobsInternal(const char *argvalue) 383 { 384 char end; 385 if (sscanf(argvalue, "%d,%d%c", &jp_0, &jp_1, &end) != 2) { 386 (void)fprintf(stderr, 387 "%s: internal error -- J option malformed (%s)\n", 388 progname, argvalue); 389 usage(); 390 } 391 if ((fcntl(jp_0, F_GETFD, 0) < 0) || 392 (fcntl(jp_1, F_GETFD, 0) < 0)) { 393 #if 0 394 (void)fprintf(stderr, 395 "%s: ###### warning -- J descriptors were closed!\n", 396 progname); 397 exit(2); 398 #endif 399 jp_0 = -1; 400 jp_1 = -1; 401 opts.compatMake = true; 402 } else { 403 Global_Append(MAKEFLAGS, "-J"); 404 Global_Append(MAKEFLAGS, argvalue); 405 } 406 } 407 408 static void 409 MainParseArgJobs(const char *argvalue) 410 { 411 char *p; 412 413 forceJobs = true; 414 opts.maxJobs = (int)strtol(argvalue, &p, 0); 415 if (*p != '\0' || opts.maxJobs < 1) { 416 (void)fprintf(stderr, 417 "%s: illegal argument to -j -- must be positive integer!\n", 418 progname); 419 exit(2); /* Not 1 so -q can distinguish error */ 420 } 421 Global_Append(MAKEFLAGS, "-j"); 422 Global_Append(MAKEFLAGS, argvalue); 423 Global_Set(".MAKE.JOBS", argvalue); 424 maxJobTokens = opts.maxJobs; 425 } 426 427 static void 428 MainParseArgSysInc(const char *argvalue) 429 { 430 /* look for magic parent directory search string */ 431 if (strncmp(".../", argvalue, 4) == 0) { 432 char *found_path = Dir_FindHereOrAbove(curdir, argvalue + 4); 433 if (found_path == NULL) 434 return; 435 (void)SearchPath_Add(sysIncPath, found_path); 436 free(found_path); 437 } else { 438 (void)SearchPath_Add(sysIncPath, argvalue); 439 } 440 Global_Append(MAKEFLAGS, "-m"); 441 Global_Append(MAKEFLAGS, argvalue); 442 } 443 444 static bool 445 MainParseArg(char c, const char *argvalue) 446 { 447 switch (c) { 448 case '\0': 449 break; 450 case 'B': 451 opts.compatMake = true; 452 Global_Append(MAKEFLAGS, "-B"); 453 Global_Set(MAKE_MODE, "compat"); 454 break; 455 case 'C': 456 MainParseArgChdir(argvalue); 457 break; 458 case 'D': 459 if (argvalue[0] == '\0') 460 return false; 461 Global_SetExpand(argvalue, "1"); 462 Global_Append(MAKEFLAGS, "-D"); 463 Global_Append(MAKEFLAGS, argvalue); 464 break; 465 case 'I': 466 Parse_AddIncludeDir(argvalue); 467 Global_Append(MAKEFLAGS, "-I"); 468 Global_Append(MAKEFLAGS, argvalue); 469 break; 470 case 'J': 471 MainParseArgJobsInternal(argvalue); 472 break; 473 case 'N': 474 opts.noExecute = true; 475 opts.noRecursiveExecute = true; 476 Global_Append(MAKEFLAGS, "-N"); 477 break; 478 case 'S': 479 opts.keepgoing = false; 480 Global_Append(MAKEFLAGS, "-S"); 481 break; 482 case 'T': 483 tracefile = bmake_strdup(argvalue); 484 Global_Append(MAKEFLAGS, "-T"); 485 Global_Append(MAKEFLAGS, argvalue); 486 break; 487 case 'V': 488 case 'v': 489 opts.printVars = c == 'v' ? PVM_EXPANDED : PVM_UNEXPANDED; 490 Lst_Append(&opts.variables, bmake_strdup(argvalue)); 491 /* XXX: Why always -V? */ 492 Global_Append(MAKEFLAGS, "-V"); 493 Global_Append(MAKEFLAGS, argvalue); 494 break; 495 case 'W': 496 opts.parseWarnFatal = true; 497 /* XXX: why no Global_Append? */ 498 break; 499 case 'X': 500 opts.varNoExportEnv = true; 501 Global_Append(MAKEFLAGS, "-X"); 502 break; 503 case 'd': 504 /* If '-d-opts' don't pass to children */ 505 if (argvalue[0] == '-') 506 argvalue++; 507 else { 508 Global_Append(MAKEFLAGS, "-d"); 509 Global_Append(MAKEFLAGS, argvalue); 510 } 511 MainParseArgDebug(argvalue); 512 break; 513 case 'e': 514 opts.checkEnvFirst = true; 515 Global_Append(MAKEFLAGS, "-e"); 516 break; 517 case 'f': 518 Lst_Append(&opts.makefiles, bmake_strdup(argvalue)); 519 break; 520 case 'i': 521 opts.ignoreErrors = true; 522 Global_Append(MAKEFLAGS, "-i"); 523 break; 524 case 'j': 525 MainParseArgJobs(argvalue); 526 break; 527 case 'k': 528 opts.keepgoing = true; 529 Global_Append(MAKEFLAGS, "-k"); 530 break; 531 case 'm': 532 MainParseArgSysInc(argvalue); 533 /* XXX: why no Var_Append? */ 534 break; 535 case 'n': 536 opts.noExecute = true; 537 Global_Append(MAKEFLAGS, "-n"); 538 break; 539 case 'q': 540 opts.query = true; 541 /* Kind of nonsensical, wot? */ 542 Global_Append(MAKEFLAGS, "-q"); 543 break; 544 case 'r': 545 opts.noBuiltins = true; 546 Global_Append(MAKEFLAGS, "-r"); 547 break; 548 case 's': 549 opts.silent = true; 550 Global_Append(MAKEFLAGS, "-s"); 551 break; 552 case 't': 553 opts.touch = true; 554 Global_Append(MAKEFLAGS, "-t"); 555 break; 556 case 'w': 557 opts.enterFlag = true; 558 Global_Append(MAKEFLAGS, "-w"); 559 break; 560 default: 561 case '?': 562 usage(); 563 } 564 return true; 565 } 566 567 /* 568 * Parse the given arguments. Called from main() and from 569 * Main_ParseArgLine() when the .MAKEFLAGS target is used. 570 * 571 * The arguments must be treated as read-only and will be freed after the 572 * call. 573 * 574 * XXX: Deal with command line overriding .MAKEFLAGS in makefile 575 */ 576 static void 577 MainParseArgs(int argc, char **argv) 578 { 579 char c; 580 int arginc; 581 char *argvalue; 582 char *optscan; 583 bool inOption, dashDash = false; 584 585 const char *optspecs = "BC:D:I:J:NST:V:WXd:ef:ij:km:nqrstv:w"; 586 /* Can't actually use getopt(3) because rescanning is not portable */ 587 588 rearg: 589 inOption = false; 590 optscan = NULL; 591 while (argc > 1) { 592 const char *optspec; 593 if (!inOption) 594 optscan = argv[1]; 595 c = *optscan++; 596 arginc = 0; 597 if (inOption) { 598 if (c == '\0') { 599 argv++; 600 argc--; 601 inOption = false; 602 continue; 603 } 604 } else { 605 if (c != '-' || dashDash) 606 break; 607 inOption = true; 608 c = *optscan++; 609 } 610 /* '-' found at some earlier point */ 611 optspec = strchr(optspecs, c); 612 if (c != '\0' && optspec != NULL && optspec[1] == ':') { 613 /* 614 * -<something> found, and <something> should have an 615 * argument 616 */ 617 inOption = false; 618 arginc = 1; 619 argvalue = optscan; 620 if (*argvalue == '\0') { 621 if (argc < 3) 622 goto noarg; 623 argvalue = argv[2]; 624 arginc = 2; 625 } 626 } else { 627 argvalue = NULL; 628 } 629 switch (c) { 630 case '\0': 631 arginc = 1; 632 inOption = false; 633 break; 634 case '-': 635 dashDash = true; 636 break; 637 default: 638 if (!MainParseArg(c, argvalue)) 639 goto noarg; 640 } 641 argv += arginc; 642 argc -= arginc; 643 } 644 645 /* 646 * See if the rest of the arguments are variable assignments and 647 * perform them if so. Else take them to be targets and stuff them 648 * on the end of the "create" list. 649 */ 650 for (; argc > 1; argv++, argc--) { 651 VarAssign var; 652 if (Parse_IsVar(argv[1], &var)) { 653 Parse_Var(&var, SCOPE_CMDLINE); 654 } else { 655 if (argv[1][0] == '\0') 656 Punt("illegal (null) argument."); 657 if (argv[1][0] == '-' && !dashDash) 658 goto rearg; 659 Lst_Append(&opts.create, bmake_strdup(argv[1])); 660 } 661 } 662 663 return; 664 noarg: 665 (void)fprintf(stderr, "%s: option requires an argument -- %c\n", 666 progname, c); 667 usage(); 668 } 669 670 /* 671 * Break a line of arguments into words and parse them. 672 * 673 * Used when a .MFLAGS or .MAKEFLAGS target is encountered during parsing and 674 * by main() when reading the MAKEFLAGS environment variable. 675 */ 676 void 677 Main_ParseArgLine(const char *line) 678 { 679 Words words; 680 char *buf; 681 682 if (line == NULL) 683 return; 684 /* XXX: don't use line as an iterator variable */ 685 for (; *line == ' '; line++) 686 continue; 687 if (line[0] == '\0') 688 return; 689 690 { 691 FStr argv0 = Var_Value(SCOPE_GLOBAL, ".MAKE"); 692 buf = str_concat3(argv0.str, " ", line); 693 FStr_Done(&argv0); 694 } 695 696 words = Str_Words(buf, true); 697 if (words.words == NULL) { 698 Error("Unterminated quoted string [%s]", buf); 699 free(buf); 700 return; 701 } 702 free(buf); 703 MainParseArgs((int)words.len, words.words); 704 705 Words_Free(words); 706 } 707 708 bool 709 Main_SetObjdir(bool writable, const char *fmt, ...) 710 { 711 struct stat sb; 712 char *path; 713 char buf[MAXPATHLEN + 1]; 714 char buf2[MAXPATHLEN + 1]; 715 bool rc = false; 716 va_list ap; 717 718 va_start(ap, fmt); 719 vsnprintf(path = buf, MAXPATHLEN, fmt, ap); 720 va_end(ap); 721 722 if (path[0] != '/') { 723 snprintf(buf2, MAXPATHLEN, "%s/%s", curdir, path); 724 path = buf2; 725 } 726 727 /* look for the directory and try to chdir there */ 728 if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) { 729 if ((writable && access(path, W_OK) != 0) || 730 (chdir(path) != 0)) { 731 (void)fprintf(stderr, "%s warning: %s: %s.\n", 732 progname, path, strerror(errno)); 733 } else { 734 snprintf(objdir, sizeof objdir, "%s", path); 735 Global_Set(".OBJDIR", objdir); 736 setenv("PWD", objdir, 1); 737 Dir_InitDot(); 738 purge_relative_cached_realpaths(); 739 rc = true; 740 if (opts.enterFlag && strcmp(objdir, curdir) != 0) 741 enterFlagObj = true; 742 } 743 } 744 745 return rc; 746 } 747 748 static bool 749 SetVarObjdir(bool writable, const char *var, const char *suffix) 750 { 751 FStr path = Var_Value(SCOPE_CMDLINE, var); 752 753 if (path.str == NULL || path.str[0] == '\0') { 754 FStr_Done(&path); 755 return false; 756 } 757 758 /* expand variable substitutions */ 759 if (strchr(path.str, '$') != 0) { 760 char *expanded; 761 (void)Var_Subst(path.str, SCOPE_GLOBAL, VARE_WANTRES, &expanded); 762 /* TODO: handle errors */ 763 FStr_Done(&path); 764 path = FStr_InitOwn(expanded); 765 } 766 767 (void)Main_SetObjdir(writable, "%s%s", path.str, suffix); 768 769 FStr_Done(&path); 770 return true; 771 } 772 773 /* 774 * Splits str into words, adding them to the list. 775 * The string must be kept alive as long as the list. 776 */ 777 int 778 str2Lst_Append(StringList *lp, char *str) 779 { 780 char *cp; 781 int n; 782 783 const char *sep = " \t"; 784 785 for (n = 0, cp = strtok(str, sep); cp != NULL; cp = strtok(NULL, sep)) { 786 Lst_Append(lp, cp); 787 n++; 788 } 789 return n; 790 } 791 792 #ifdef SIGINFO 793 /*ARGSUSED*/ 794 static void 795 siginfo(int signo MAKE_ATTR_UNUSED) 796 { 797 char dir[MAXPATHLEN]; 798 char str[2 * MAXPATHLEN]; 799 int len; 800 if (getcwd(dir, sizeof dir) == NULL) 801 return; 802 len = snprintf(str, sizeof str, "%s: Working in: %s\n", progname, dir); 803 if (len > 0) 804 (void)write(STDERR_FILENO, str, (size_t)len); 805 } 806 #endif 807 808 /* Allow makefiles some control over the mode we run in. */ 809 static void 810 MakeMode(void) 811 { 812 char *mode; 813 814 (void)Var_Subst("${" MAKE_MODE ":tl}", SCOPE_GLOBAL, VARE_WANTRES, &mode); 815 /* TODO: handle errors */ 816 817 if (mode[0] != '\0') { 818 if (strstr(mode, "compat") != NULL) { 819 opts.compatMake = true; 820 forceJobs = false; 821 } 822 #if USE_META 823 if (strstr(mode, "meta") != NULL) 824 meta_mode_init(mode); 825 #endif 826 } 827 828 free(mode); 829 } 830 831 static void 832 PrintVar(const char *varname, bool expandVars) 833 { 834 if (strchr(varname, '$') != NULL) { 835 char *evalue; 836 (void)Var_Subst(varname, SCOPE_GLOBAL, VARE_WANTRES, &evalue); 837 /* TODO: handle errors */ 838 printf("%s\n", evalue); 839 free(evalue); 840 841 } else if (expandVars) { 842 char *expr = str_concat3("${", varname, "}"); 843 char *evalue; 844 (void)Var_Subst(expr, SCOPE_GLOBAL, VARE_WANTRES, &evalue); 845 /* TODO: handle errors */ 846 free(expr); 847 printf("%s\n", evalue); 848 free(evalue); 849 850 } else { 851 FStr value = Var_Value(SCOPE_GLOBAL, varname); 852 printf("%s\n", value.str != NULL ? value.str : ""); 853 FStr_Done(&value); 854 } 855 } 856 857 /* 858 * Return a bool based on a variable. 859 * 860 * If the knob is not set, return the fallback. 861 * If set, anything that looks or smells like "No", "False", "Off", "0", etc. 862 * is false, otherwise true. 863 */ 864 static bool 865 GetBooleanExpr(const char *expr, bool fallback) 866 { 867 char *value; 868 bool res; 869 870 (void)Var_Subst(expr, SCOPE_GLOBAL, VARE_WANTRES, &value); 871 /* TODO: handle errors */ 872 res = ParseBoolean(value, fallback); 873 free(value); 874 return res; 875 } 876 877 static void 878 doPrintVars(void) 879 { 880 StringListNode *ln; 881 bool expandVars; 882 883 if (opts.printVars == PVM_EXPANDED) 884 expandVars = true; 885 else if (opts.debugVflag) 886 expandVars = false; 887 else 888 expandVars = GetBooleanExpr("${.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 /* 931 * Compat_Init will take care of creating all the 932 * targets as well as initializing the module. 933 */ 934 Compat_Run(&targs); 935 outOfDate = false; 936 } 937 Lst_Done(&targs); /* Don't free the targets themselves. */ 938 return outOfDate; 939 } 940 941 /* 942 * Set up the .TARGETS variable to contain the list of targets to be 943 * created. If none specified, make the variable empty -- the parser 944 * will fill the thing in with the default or .MAIN target. 945 */ 946 static void 947 InitVarTargets(void) 948 { 949 StringListNode *ln; 950 951 if (Lst_IsEmpty(&opts.create)) { 952 Global_Set(".TARGETS", ""); 953 return; 954 } 955 956 for (ln = opts.create.first; ln != NULL; ln = ln->next) { 957 const char *name = ln->datum; 958 Global_Append(".TARGETS", name); 959 } 960 } 961 962 static void 963 InitRandom(void) 964 { 965 struct timeval tv; 966 967 gettimeofday(&tv, NULL); 968 srandom((unsigned int)(tv.tv_sec + tv.tv_usec)); 969 } 970 971 static const char * 972 InitVarMachine(const struct utsname *utsname MAKE_ATTR_UNUSED) 973 { 974 const char *machine = getenv("MACHINE"); 975 if (machine != NULL) 976 return machine; 977 978 #if defined(MAKE_NATIVE) 979 return utsname->machine; 980 #elif defined(MAKE_MACHINE) 981 return MAKE_MACHINE; 982 #else 983 return "unknown"; 984 #endif 985 } 986 987 static const char * 988 InitVarMachineArch(void) 989 { 990 const char *env = getenv("MACHINE_ARCH"); 991 if (env != NULL) 992 return env; 993 994 #ifdef MAKE_NATIVE 995 { 996 struct utsname utsname; 997 static char machine_arch_buf[sizeof utsname.machine]; 998 const int mib[2] = { CTL_HW, HW_MACHINE_ARCH }; 999 size_t len = sizeof machine_arch_buf; 1000 1001 if (sysctl(mib, (unsigned int)__arraycount(mib), 1002 machine_arch_buf, &len, NULL, 0) < 0) { 1003 (void)fprintf(stderr, "%s: sysctl failed (%s).\n", 1004 progname, strerror(errno)); 1005 exit(2); 1006 } 1007 1008 return machine_arch_buf; 1009 } 1010 #elif defined(MACHINE_ARCH) 1011 return MACHINE_ARCH; 1012 #elif defined(MAKE_MACHINE_ARCH) 1013 return MAKE_MACHINE_ARCH; 1014 #else 1015 return "unknown"; 1016 #endif 1017 } 1018 1019 #ifndef NO_PWD_OVERRIDE 1020 /* 1021 * All this code is so that we know where we are when we start up 1022 * on a different machine with pmake. 1023 * 1024 * XXX: Make no longer has "local" and "remote" mode. Is this code still 1025 * necessary? 1026 * 1027 * Overriding getcwd() with $PWD totally breaks MAKEOBJDIRPREFIX 1028 * since the value of curdir can vary depending on how we got 1029 * here. Ie sitting at a shell prompt (shell that provides $PWD) 1030 * or via subdir.mk in which case its likely a shell which does 1031 * not provide it. 1032 * 1033 * So, to stop it breaking this case only, we ignore PWD if 1034 * MAKEOBJDIRPREFIX is set or MAKEOBJDIR contains a variable expression. 1035 */ 1036 static void 1037 HandlePWD(const struct stat *curdir_st) 1038 { 1039 char *pwd; 1040 FStr prefix, makeobjdir; 1041 struct stat pwd_st; 1042 1043 if (ignorePWD || (pwd = getenv("PWD")) == NULL) 1044 return; 1045 1046 prefix = Var_Value(SCOPE_CMDLINE, "MAKEOBJDIRPREFIX"); 1047 if (prefix.str != NULL) { 1048 FStr_Done(&prefix); 1049 return; 1050 } 1051 1052 makeobjdir = Var_Value(SCOPE_CMDLINE, "MAKEOBJDIR"); 1053 if (makeobjdir.str != NULL && strchr(makeobjdir.str, '$') != NULL) 1054 goto ignore_pwd; 1055 1056 if (stat(pwd, &pwd_st) == 0 && 1057 curdir_st->st_ino == pwd_st.st_ino && 1058 curdir_st->st_dev == pwd_st.st_dev) 1059 (void)strncpy(curdir, pwd, MAXPATHLEN); 1060 1061 ignore_pwd: 1062 FStr_Done(&makeobjdir); 1063 } 1064 #endif 1065 1066 /* 1067 * Find the .OBJDIR. If MAKEOBJDIRPREFIX, or failing that, MAKEOBJDIR is set 1068 * in the environment, try only that value and fall back to .CURDIR if it 1069 * does not exist. 1070 * 1071 * Otherwise, try _PATH_OBJDIR.MACHINE-MACHINE_ARCH, _PATH_OBJDIR.MACHINE, 1072 * and finally _PATH_OBJDIRPREFIX`pwd`, in that order. If none of these 1073 * paths exist, just use .CURDIR. 1074 */ 1075 static void 1076 InitObjdir(const char *machine, const char *machine_arch) 1077 { 1078 bool writable; 1079 1080 Dir_InitCur(curdir); 1081 writable = GetBooleanExpr("${MAKE_OBJDIR_CHECK_WRITABLE}", true); 1082 (void)Main_SetObjdir(false, "%s", curdir); 1083 1084 if (!SetVarObjdir(writable, "MAKEOBJDIRPREFIX", curdir) && 1085 !SetVarObjdir(writable, "MAKEOBJDIR", "") && 1086 !Main_SetObjdir(writable, "%s.%s-%s", _PATH_OBJDIR, machine, machine_arch) && 1087 !Main_SetObjdir(writable, "%s.%s", _PATH_OBJDIR, machine) && 1088 !Main_SetObjdir(writable, "%s", _PATH_OBJDIR)) 1089 (void)Main_SetObjdir(writable, "%s%s", _PATH_OBJDIRPREFIX, curdir); 1090 } 1091 1092 /* get rid of resource limit on file descriptors */ 1093 static void 1094 UnlimitFiles(void) 1095 { 1096 #if defined(MAKE_NATIVE) || (defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE)) 1097 struct rlimit rl; 1098 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 && 1099 rl.rlim_cur != rl.rlim_max) { 1100 rl.rlim_cur = rl.rlim_max; 1101 (void)setrlimit(RLIMIT_NOFILE, &rl); 1102 } 1103 #endif 1104 } 1105 1106 static void 1107 CmdOpts_Init(void) 1108 { 1109 opts.compatMake = false; 1110 memset(&opts.debug, 0, sizeof(opts.debug)); 1111 /* opts.debug_file has already been initialized earlier */ 1112 opts.strict = false; 1113 opts.debugVflag = false; 1114 opts.checkEnvFirst = false; 1115 Lst_Init(&opts.makefiles); 1116 opts.ignoreErrors = false; /* Pay attention to non-zero returns */ 1117 opts.maxJobs = 1; 1118 opts.keepgoing = false; /* Stop on error */ 1119 opts.noRecursiveExecute = false; /* Execute all .MAKE targets */ 1120 opts.noExecute = false; /* Execute all commands */ 1121 opts.query = false; 1122 opts.noBuiltins = false; /* Read the built-in rules */ 1123 opts.silent = false; /* Print commands as executed */ 1124 opts.touch = false; 1125 opts.printVars = PVM_NONE; 1126 Lst_Init(&opts.variables); 1127 opts.parseWarnFatal = false; 1128 opts.enterFlag = false; 1129 opts.varNoExportEnv = false; 1130 Lst_Init(&opts.create); 1131 } 1132 1133 /* 1134 * Initialize MAKE and .MAKE to the path of the executable, so that it can be 1135 * found by execvp(3) and the shells, even after a chdir. 1136 * 1137 * If it's a relative path and contains a '/', resolve it to an absolute path. 1138 * Otherwise keep it as is, assuming it will be found in the PATH. 1139 */ 1140 static void 1141 InitVarMake(const char *argv0) 1142 { 1143 const char *make = argv0; 1144 1145 if (argv0[0] != '/' && strchr(argv0, '/') != NULL) { 1146 char pathbuf[MAXPATHLEN]; 1147 const char *abspath = cached_realpath(argv0, pathbuf); 1148 struct stat st; 1149 if (abspath != NULL && abspath[0] == '/' && 1150 stat(make, &st) == 0) 1151 make = abspath; 1152 } 1153 1154 Global_Set("MAKE", make); 1155 Global_Set(".MAKE", make); 1156 } 1157 1158 /* 1159 * Add the directories from the colon-separated syspath to defSysIncPath. 1160 * After returning, the contents of syspath is unspecified. 1161 */ 1162 static void 1163 InitDefSysIncPath(char *syspath) 1164 { 1165 static char defsyspath[] = _PATH_DEFSYSPATH; 1166 char *start, *cp; 1167 1168 /* 1169 * If no user-supplied system path was given (through the -m option) 1170 * add the directories from the DEFSYSPATH (more than one may be given 1171 * as dir1:...:dirn) to the system include path. 1172 */ 1173 if (syspath == NULL || syspath[0] == '\0') 1174 syspath = defsyspath; 1175 else 1176 syspath = bmake_strdup(syspath); 1177 1178 for (start = syspath; *start != '\0'; start = cp) { 1179 for (cp = start; *cp != '\0' && *cp != ':'; cp++) 1180 continue; 1181 if (*cp == ':') 1182 *cp++ = '\0'; 1183 1184 /* look for magic parent directory search string */ 1185 if (strncmp(start, ".../", 4) == 0) { 1186 char *dir = Dir_FindHereOrAbove(curdir, start + 4); 1187 if (dir != NULL) { 1188 (void)SearchPath_Add(defSysIncPath, dir); 1189 free(dir); 1190 } 1191 } else { 1192 (void)SearchPath_Add(defSysIncPath, start); 1193 } 1194 } 1195 1196 if (syspath != defsyspath) 1197 free(syspath); 1198 } 1199 1200 static void 1201 ReadBuiltinRules(void) 1202 { 1203 StringListNode *ln; 1204 StringList sysMkFiles = LST_INIT; 1205 1206 SearchPath_Expand( 1207 Lst_IsEmpty(&sysIncPath->dirs) ? defSysIncPath : sysIncPath, 1208 _PATH_DEFSYSMK, 1209 &sysMkFiles); 1210 if (Lst_IsEmpty(&sysMkFiles)) 1211 Fatal("%s: no system rules (%s).", progname, _PATH_DEFSYSMK); 1212 1213 for (ln = sysMkFiles.first; ln != NULL; ln = ln->next) 1214 if (ReadMakefile(ln->datum)) 1215 break; 1216 1217 if (ln == NULL) 1218 Fatal("%s: cannot open %s.", 1219 progname, (const char *)sysMkFiles.first->datum); 1220 1221 /* 1222 * Free the list nodes but not the actual filenames since these may 1223 * still be used in GNodes. 1224 * 1225 * TODO: Check whether the above is still true after Str_Intern has 1226 * been added. 1227 */ 1228 Lst_Done(&sysMkFiles); 1229 } 1230 1231 static void 1232 InitMaxJobs(void) 1233 { 1234 char *value; 1235 int n; 1236 1237 if (forceJobs || opts.compatMake || 1238 !Var_Exists(SCOPE_GLOBAL, ".MAKE.JOBS")) 1239 return; 1240 1241 (void)Var_Subst("${.MAKE.JOBS}", SCOPE_GLOBAL, VARE_WANTRES, &value); 1242 /* TODO: handle errors */ 1243 n = (int)strtol(value, NULL, 0); 1244 if (n < 1) { 1245 (void)fprintf(stderr, 1246 "%s: illegal value for .MAKE.JOBS " 1247 "-- must be positive integer!\n", 1248 progname); 1249 exit(2); /* Not 1 so -q can distinguish error */ 1250 } 1251 1252 if (n != opts.maxJobs) { 1253 Global_Append(MAKEFLAGS, "-j"); 1254 Global_Append(MAKEFLAGS, value); 1255 } 1256 1257 opts.maxJobs = n; 1258 maxJobTokens = opts.maxJobs; 1259 forceJobs = true; 1260 free(value); 1261 } 1262 1263 /* 1264 * For compatibility, look at the directories in the VPATH variable 1265 * and add them to the search path, if the variable is defined. The 1266 * variable's value is in the same format as the PATH environment 1267 * variable, i.e. <directory>:<directory>:<directory>... 1268 */ 1269 static void 1270 InitVpath(void) 1271 { 1272 char *vpath, savec, *path; 1273 if (!Var_Exists(SCOPE_CMDLINE, "VPATH")) 1274 return; 1275 1276 (void)Var_Subst("${VPATH}", SCOPE_CMDLINE, VARE_WANTRES, &vpath); 1277 /* TODO: handle errors */ 1278 path = vpath; 1279 do { 1280 char *cp; 1281 /* skip to end of directory */ 1282 for (cp = path; *cp != ':' && *cp != '\0'; cp++) 1283 continue; 1284 /* Save terminator character so know when to stop */ 1285 savec = *cp; 1286 *cp = '\0'; 1287 /* Add directory to search path */ 1288 (void)SearchPath_Add(&dirSearchPath, path); 1289 *cp = savec; 1290 path = cp + 1; 1291 } while (savec == ':'); 1292 free(vpath); 1293 } 1294 1295 static void 1296 ReadAllMakefiles(const StringList *makefiles) 1297 { 1298 StringListNode *ln; 1299 1300 for (ln = makefiles->first; ln != NULL; ln = ln->next) { 1301 const char *fname = ln->datum; 1302 if (!ReadMakefile(fname)) 1303 Fatal("%s: cannot open %s.", progname, fname); 1304 } 1305 } 1306 1307 static void 1308 ReadFirstDefaultMakefile(void) 1309 { 1310 StringListNode *ln; 1311 char *prefs; 1312 1313 (void)Var_Subst("${" MAKE_MAKEFILE_PREFERENCE "}", 1314 SCOPE_CMDLINE, VARE_WANTRES, &prefs); 1315 /* TODO: handle errors */ 1316 1317 /* 1318 * XXX: This should use a local list instead of opts.makefiles since 1319 * these makefiles do not come from the command line. They also have 1320 * different semantics in that only the first file that is found is 1321 * processed. See ReadAllMakefiles. 1322 */ 1323 (void)str2Lst_Append(&opts.makefiles, prefs); 1324 1325 for (ln = opts.makefiles.first; ln != NULL; ln = ln->next) 1326 if (ReadMakefile(ln->datum)) 1327 break; 1328 1329 free(prefs); 1330 } 1331 1332 /* 1333 * Initialize variables such as MAKE, MACHINE, .MAKEFLAGS. 1334 * Initialize a few modules. 1335 * Parse the arguments from MAKEFLAGS and the command line. 1336 */ 1337 static void 1338 main_Init(int argc, char **argv) 1339 { 1340 struct stat sa; 1341 const char *machine; 1342 const char *machine_arch; 1343 char *syspath = getenv("MAKESYSPATH"); 1344 struct utsname utsname; 1345 1346 /* default to writing debug to stderr */ 1347 opts.debug_file = stderr; 1348 1349 Str_Intern_Init(); 1350 HashTable_Init(&cached_realpaths); 1351 1352 #ifdef SIGINFO 1353 (void)bmake_signal(SIGINFO, siginfo); 1354 #endif 1355 1356 InitRandom(); 1357 1358 progname = str_basename(argv[0]); 1359 1360 UnlimitFiles(); 1361 1362 if (uname(&utsname) == -1) { 1363 (void)fprintf(stderr, "%s: uname failed (%s).\n", progname, 1364 strerror(errno)); 1365 exit(2); 1366 } 1367 1368 /* 1369 * Get the name of this type of MACHINE from utsname 1370 * so we can share an executable for similar machines. 1371 * (i.e. m68k: amiga hp300, mac68k, sun3, ...) 1372 * 1373 * Note that both MACHINE and MACHINE_ARCH are decided at 1374 * run-time. 1375 */ 1376 machine = InitVarMachine(&utsname); 1377 machine_arch = InitVarMachineArch(); 1378 1379 myPid = getpid(); /* remember this for vFork() */ 1380 1381 /* 1382 * Just in case MAKEOBJDIR wants us to do something tricky. 1383 */ 1384 Targ_Init(); 1385 Var_Init(); 1386 Global_Set(".MAKE.OS", utsname.sysname); 1387 Global_Set("MACHINE", machine); 1388 Global_Set("MACHINE_ARCH", machine_arch); 1389 #ifdef MAKE_VERSION 1390 Global_Set("MAKE_VERSION", MAKE_VERSION); 1391 #endif 1392 Global_Set(".newline", "\n"); /* handy for :@ loops */ 1393 #ifndef MAKEFILE_PREFERENCE_LIST 1394 /* This is the traditional preference for makefiles. */ 1395 # define MAKEFILE_PREFERENCE_LIST "makefile Makefile" 1396 #endif 1397 Global_Set(MAKE_MAKEFILE_PREFERENCE, MAKEFILE_PREFERENCE_LIST); 1398 Global_Set(MAKE_DEPENDFILE, ".depend"); 1399 1400 CmdOpts_Init(); 1401 allPrecious = false; /* Remove targets when interrupted */ 1402 deleteOnError = false; /* Historical default behavior */ 1403 jobsRunning = false; 1404 1405 maxJobTokens = opts.maxJobs; 1406 ignorePWD = false; 1407 1408 /* 1409 * Initialize the parsing, directory and variable modules to prepare 1410 * for the reading of inclusion paths and variable settings on the 1411 * command line 1412 */ 1413 1414 /* 1415 * Initialize various variables. 1416 * MAKE also gets this name, for compatibility 1417 * .MAKEFLAGS gets set to the empty string just in case. 1418 * MFLAGS also gets initialized empty, for compatibility. 1419 */ 1420 Parse_Init(); 1421 InitVarMake(argv[0]); 1422 Global_Set(MAKEFLAGS, ""); 1423 Global_Set(MAKEOVERRIDES, ""); 1424 Global_Set("MFLAGS", ""); 1425 Global_Set(".ALLTARGETS", ""); 1426 Var_Set(SCOPE_CMDLINE, MAKE_LEVEL ".ENV", MAKE_LEVEL_ENV); 1427 1428 /* Set some other useful variables. */ 1429 { 1430 char buf[64], *ep = getenv(MAKE_LEVEL_ENV); 1431 1432 makelevel = ep != NULL && ep[0] != '\0' ? atoi(ep) : 0; 1433 if (makelevel < 0) 1434 makelevel = 0; 1435 snprintf(buf, sizeof buf, "%d", makelevel); 1436 Global_Set(MAKE_LEVEL, buf); 1437 snprintf(buf, sizeof buf, "%u", myPid); 1438 Global_Set(".MAKE.PID", buf); 1439 snprintf(buf, sizeof buf, "%u", getppid()); 1440 Global_Set(".MAKE.PPID", buf); 1441 snprintf(buf, sizeof buf, "%u", getuid()); 1442 Global_Set(".MAKE.UID", buf); 1443 snprintf(buf, sizeof buf, "%u", getgid()); 1444 Global_Set(".MAKE.GID", buf); 1445 } 1446 if (makelevel > 0) { 1447 char pn[1024]; 1448 snprintf(pn, sizeof pn, "%s[%d]", progname, makelevel); 1449 progname = bmake_strdup(pn); 1450 } 1451 1452 #ifdef USE_META 1453 meta_init(); 1454 #endif 1455 Dir_Init(); 1456 1457 #ifdef POSIX 1458 { 1459 char *p1 = explode(getenv("MAKEFLAGS")); 1460 Main_ParseArgLine(p1); 1461 free(p1); 1462 } 1463 #else 1464 /* 1465 * First snag any flags out of the MAKE environment variable. 1466 * (Note this is *not* MAKEFLAGS since /bin/make uses that and it's 1467 * in a different format). 1468 */ 1469 Main_ParseArgLine(getenv("MAKE")); 1470 #endif 1471 1472 if (getcwd(curdir, MAXPATHLEN) == NULL) { 1473 (void)fprintf(stderr, "%s: getcwd: %s.\n", 1474 progname, strerror(errno)); 1475 exit(2); 1476 } 1477 1478 MainParseArgs(argc, argv); 1479 1480 if (opts.enterFlag) 1481 printf("%s: Entering directory `%s'\n", progname, curdir); 1482 1483 if (stat(curdir, &sa) == -1) { 1484 (void)fprintf(stderr, "%s: %s: %s.\n", 1485 progname, curdir, strerror(errno)); 1486 exit(2); 1487 } 1488 1489 #ifndef NO_PWD_OVERRIDE 1490 HandlePWD(&sa); 1491 #endif 1492 Global_Set(".CURDIR", curdir); 1493 1494 InitObjdir(machine, machine_arch); 1495 1496 Arch_Init(); 1497 Suff_Init(); 1498 Trace_Init(tracefile); 1499 1500 defaultNode = NULL; 1501 (void)time(&now); 1502 1503 Trace_Log(MAKESTART, NULL); 1504 1505 InitVarTargets(); 1506 1507 InitDefSysIncPath(syspath); 1508 } 1509 1510 /* 1511 * Read the system makefile followed by either makefile, Makefile or the 1512 * files given by the -f option. Exit on parse errors. 1513 */ 1514 static void 1515 main_ReadFiles(void) 1516 { 1517 1518 if (!opts.noBuiltins) 1519 ReadBuiltinRules(); 1520 1521 if (!Lst_IsEmpty(&opts.makefiles)) 1522 ReadAllMakefiles(&opts.makefiles); 1523 else 1524 ReadFirstDefaultMakefile(); 1525 } 1526 1527 /* Compute the dependency graph. */ 1528 static void 1529 main_PrepareMaking(void) 1530 { 1531 /* In particular suppress .depend for '-r -V .OBJDIR -f /dev/null' */ 1532 if (!opts.noBuiltins || opts.printVars == PVM_NONE) { 1533 (void)Var_Subst("${.MAKE.DEPENDFILE}", 1534 SCOPE_CMDLINE, VARE_WANTRES, &makeDependfile); 1535 if (makeDependfile[0] != '\0') { 1536 /* TODO: handle errors */ 1537 doing_depend = true; 1538 (void)ReadMakefile(makeDependfile); 1539 doing_depend = false; 1540 } 1541 } 1542 1543 if (enterFlagObj) 1544 printf("%s: Entering directory `%s'\n", progname, objdir); 1545 1546 MakeMode(); 1547 1548 { 1549 FStr makeflags = Var_Value(SCOPE_GLOBAL, MAKEFLAGS); 1550 Global_Append("MFLAGS", makeflags.str); 1551 FStr_Done(&makeflags); 1552 } 1553 1554 InitMaxJobs(); 1555 1556 if (!opts.compatMake && !forceJobs) 1557 opts.compatMake = true; 1558 1559 if (!opts.compatMake) 1560 Job_ServerStart(maxJobTokens, jp_0, jp_1); 1561 DEBUG5(JOB, "job_pipe %d %d, maxjobs %d, tokens %d, compat %d\n", 1562 jp_0, jp_1, opts.maxJobs, maxJobTokens, opts.compatMake ? 1 : 0); 1563 1564 if (opts.printVars == PVM_NONE) 1565 Main_ExportMAKEFLAGS(true); /* initial export */ 1566 1567 InitVpath(); 1568 1569 /* 1570 * Now that all search paths have been read for suffixes et al, it's 1571 * time to add the default search path to their lists... 1572 */ 1573 Suff_ExtendPaths(); 1574 1575 /* 1576 * Propagate attributes through :: dependency lists. 1577 */ 1578 Targ_Propagate(); 1579 1580 /* print the initial graph, if the user requested it */ 1581 if (DEBUG(GRAPH1)) 1582 Targ_PrintGraph(1); 1583 } 1584 1585 /* 1586 * Make the targets. 1587 * If the -v or -V options are given, print variables instead. 1588 * Return whether any of the targets is out-of-date. 1589 */ 1590 static bool 1591 main_Run(void) 1592 { 1593 if (opts.printVars != PVM_NONE) { 1594 /* print the values of any variables requested by the user */ 1595 doPrintVars(); 1596 return false; 1597 } else { 1598 return runTargets(); 1599 } 1600 } 1601 1602 /* Clean up after making the targets. */ 1603 static void 1604 main_CleanUp(void) 1605 { 1606 #ifdef CLEANUP 1607 Lst_DoneCall(&opts.variables, free); 1608 Lst_Done(&opts.makefiles); 1609 Lst_DoneCall(&opts.create, free); 1610 #endif 1611 1612 if (DEBUG(GRAPH2)) 1613 Targ_PrintGraph(2); 1614 1615 Trace_Log(MAKEEND, NULL); 1616 1617 if (enterFlagObj) 1618 printf("%s: Leaving directory `%s'\n", progname, objdir); 1619 if (opts.enterFlag) 1620 printf("%s: Leaving directory `%s'\n", progname, curdir); 1621 1622 #ifdef USE_META 1623 meta_finish(); 1624 #endif 1625 Suff_End(); 1626 Targ_End(); 1627 Arch_End(); 1628 Var_End(); 1629 Parse_End(); 1630 Dir_End(); 1631 Job_End(); 1632 Trace_End(); 1633 Str_Intern_End(); 1634 } 1635 1636 /* Determine the exit code. */ 1637 static int 1638 main_Exit(bool outOfDate) 1639 { 1640 if (opts.strict && (main_errors > 0 || Parse_NumErrors() > 0)) 1641 return 2; /* Not 1 so -q can distinguish error */ 1642 return outOfDate ? 1 : 0; 1643 } 1644 1645 int 1646 main(int argc, char **argv) 1647 { 1648 bool outOfDate; 1649 1650 main_Init(argc, argv); 1651 main_ReadFiles(); 1652 main_PrepareMaking(); 1653 outOfDate = main_Run(); 1654 main_CleanUp(); 1655 return main_Exit(outOfDate); 1656 } 1657 1658 /* 1659 * Open and parse the given makefile, with all its side effects. 1660 * Return false if the file could not be opened. 1661 */ 1662 static bool 1663 ReadMakefile(const char *fname) 1664 { 1665 int fd; 1666 char *name, *path = NULL; 1667 1668 if (strcmp(fname, "-") == 0) { 1669 Parse_File(NULL /*stdin*/, -1); 1670 Var_Set(SCOPE_INTERNAL, "MAKEFILE", ""); 1671 } else { 1672 /* if we've chdir'd, rebuild the path name */ 1673 if (strcmp(curdir, objdir) != 0 && *fname != '/') { 1674 path = str_concat3(curdir, "/", fname); 1675 fd = open(path, O_RDONLY); 1676 if (fd != -1) { 1677 fname = path; 1678 goto found; 1679 } 1680 free(path); 1681 1682 /* If curdir failed, try objdir (ala .depend) */ 1683 path = str_concat3(objdir, "/", fname); 1684 fd = open(path, O_RDONLY); 1685 if (fd != -1) { 1686 fname = path; 1687 goto found; 1688 } 1689 } else { 1690 fd = open(fname, O_RDONLY); 1691 if (fd != -1) 1692 goto found; 1693 } 1694 /* look in -I and system include directories. */ 1695 name = Dir_FindFile(fname, parseIncPath); 1696 if (name == NULL) { 1697 SearchPath *sysInc = Lst_IsEmpty(&sysIncPath->dirs) 1698 ? defSysIncPath : sysIncPath; 1699 name = Dir_FindFile(fname, sysInc); 1700 } 1701 if (name == NULL || (fd = open(name, O_RDONLY)) == -1) { 1702 free(name); 1703 free(path); 1704 return false; 1705 } 1706 fname = name; 1707 /* 1708 * set the MAKEFILE variable desired by System V fans -- the 1709 * placement of the setting here means it gets set to the last 1710 * makefile specified, as it is set by SysV make. 1711 */ 1712 found: 1713 if (!doing_depend) 1714 Var_Set(SCOPE_INTERNAL, "MAKEFILE", fname); 1715 Parse_File(fname, fd); 1716 } 1717 free(path); 1718 return true; 1719 } 1720 1721 /* 1722 * Execute the command in cmd, and return its output (only stdout, not 1723 * stderr). In the output, replace newlines with spaces. 1724 * 1725 * Results: 1726 * The output of the command, can be empty. 1727 * *errfmt returns a format string describing the command failure, 1728 * if any, using a single %s conversion specification. 1729 * TODO: replace errfmt with an actual error message. 1730 */ 1731 char * 1732 Cmd_Exec(const char *cmd, const char **errfmt) 1733 { 1734 const char *args[4]; /* Arguments for invoking the shell */ 1735 int pipefds[2]; 1736 int cpid; /* Child PID */ 1737 int pid; /* PID from wait() */ 1738 int status; /* command exit status */ 1739 Buffer buf; /* buffer to store the result */ 1740 ssize_t bytes_read; 1741 char *res; /* result */ 1742 size_t res_len; 1743 char *cp; 1744 int savederr; /* saved errno */ 1745 1746 *errfmt = NULL; 1747 1748 if (shellName == NULL) 1749 Shell_Init(); 1750 1751 args[0] = shellName; 1752 args[1] = "-c"; 1753 args[2] = cmd; 1754 args[3] = NULL; 1755 1756 if (pipe(pipefds) == -1) { 1757 *errfmt = "Couldn't create pipe for \"%s\""; 1758 goto bad; 1759 } 1760 1761 Var_ReexportVars(); 1762 1763 switch (cpid = vfork()) { 1764 case 0: 1765 (void)close(pipefds[0]); 1766 (void)dup2(pipefds[1], 1); 1767 (void)close(pipefds[1]); 1768 1769 (void)execv(shellPath, UNCONST(args)); 1770 _exit(1); 1771 /* NOTREACHED */ 1772 1773 case -1: 1774 *errfmt = "Couldn't exec \"%s\""; 1775 goto bad; 1776 1777 default: 1778 (void)close(pipefds[1]); /* No need for the writing half */ 1779 1780 savederr = 0; 1781 Buf_Init(&buf); 1782 1783 do { 1784 char result[BUFSIZ]; 1785 bytes_read = read(pipefds[0], result, sizeof result); 1786 if (bytes_read > 0) 1787 Buf_AddBytes(&buf, result, (size_t)bytes_read); 1788 } while (bytes_read > 0 || 1789 (bytes_read == -1 && errno == EINTR)); 1790 if (bytes_read == -1) 1791 savederr = errno; 1792 1793 (void)close(pipefds[0]); /* Close the input side of the pipe. */ 1794 1795 while ((pid = waitpid(cpid, &status, 0)) != cpid && pid >= 0) 1796 JobReapChild(pid, status, false); 1797 1798 res_len = buf.len; 1799 res = Buf_DoneData(&buf); 1800 1801 if (savederr != 0) 1802 *errfmt = "Couldn't read shell's output for \"%s\""; 1803 1804 if (WIFSIGNALED(status)) 1805 *errfmt = "\"%s\" exited on a signal"; 1806 else if (WEXITSTATUS(status) != 0) 1807 *errfmt = "\"%s\" returned non-zero status"; 1808 1809 /* Convert newlines to spaces, strip the final newline. */ 1810 if (res_len > 0 && res[res_len - 1] == '\n') 1811 res[res_len - 1] = '\0'; 1812 for (cp = res; *cp != '\0'; cp++) 1813 if (*cp == '\n') 1814 *cp = ' '; 1815 break; 1816 } 1817 return res; 1818 bad: 1819 return bmake_strdup(""); 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 *err_file; 1834 1835 err_file = opts.debug_file; 1836 if (err_file == stdout) 1837 err_file = stderr; 1838 (void)fflush(stdout); 1839 for (;;) { 1840 va_start(ap, fmt); 1841 fprintf(err_file, "%s: ", progname); 1842 (void)vfprintf(err_file, fmt, ap); 1843 va_end(ap); 1844 (void)fprintf(err_file, "\n"); 1845 (void)fflush(err_file); 1846 if (err_file == stderr) 1847 break; 1848 err_file = stderr; 1849 } 1850 main_errors++; 1851 } 1852 1853 /* 1854 * Wait for any running jobs to finish, then produce an error message, 1855 * finally exit immediately. 1856 * 1857 * Exiting immediately differs from Parse_Error, which exits only after the 1858 * current top-level makefile has been parsed completely. 1859 */ 1860 void 1861 Fatal(const char *fmt, ...) 1862 { 1863 va_list ap; 1864 1865 if (jobsRunning) 1866 Job_Wait(); 1867 1868 (void)fflush(stdout); 1869 va_start(ap, fmt); 1870 (void)vfprintf(stderr, fmt, ap); 1871 va_end(ap); 1872 (void)fprintf(stderr, "\n"); 1873 (void)fflush(stderr); 1874 1875 PrintOnError(NULL, NULL); 1876 1877 if (DEBUG(GRAPH2) || DEBUG(GRAPH3)) 1878 Targ_PrintGraph(2); 1879 Trace_Log(MAKEERROR, NULL); 1880 exit(2); /* Not 1 so -q can distinguish error */ 1881 } 1882 1883 /* 1884 * Major exception once jobs are being created. 1885 * Kills all jobs, prints a message and exits. 1886 */ 1887 void 1888 Punt(const char *fmt, ...) 1889 { 1890 va_list ap; 1891 1892 va_start(ap, fmt); 1893 (void)fflush(stdout); 1894 (void)fprintf(stderr, "%s: ", progname); 1895 (void)vfprintf(stderr, fmt, ap); 1896 va_end(ap); 1897 (void)fprintf(stderr, "\n"); 1898 (void)fflush(stderr); 1899 1900 PrintOnError(NULL, NULL); 1901 1902 DieHorribly(); 1903 } 1904 1905 /* Exit without giving a message. */ 1906 void 1907 DieHorribly(void) 1908 { 1909 if (jobsRunning) 1910 Job_AbortAll(); 1911 if (DEBUG(GRAPH2)) 1912 Targ_PrintGraph(2); 1913 Trace_Log(MAKEERROR, NULL); 1914 exit(2); /* Not 1 so -q can distinguish error */ 1915 } 1916 1917 /* 1918 * Called when aborting due to errors in child shell to signal abnormal exit. 1919 * The program exits. 1920 * Errors is the number of errors encountered in Make_Make. 1921 */ 1922 void 1923 Finish(int errs) 1924 { 1925 if (shouldDieQuietly(NULL, -1)) 1926 exit(2); 1927 Fatal("%d error%s", errs, errs == 1 ? "" : "s"); 1928 } 1929 1930 bool 1931 unlink_file(const char *file) 1932 { 1933 struct stat st; 1934 1935 if (lstat(file, &st) == -1) 1936 return false; 1937 1938 if (S_ISDIR(st.st_mode)) { 1939 errno = EISDIR; 1940 return false; 1941 } 1942 return unlink(file) == 0; 1943 } 1944 1945 static void 1946 write_all(int fd, const void *data, size_t n) 1947 { 1948 const char *mem = data; 1949 1950 while (n > 0) { 1951 ssize_t written = write(fd, mem, n); 1952 if (written == -1 && errno == EAGAIN) 1953 continue; 1954 if (written == -1) 1955 break; 1956 mem += written; 1957 n -= (size_t)written; 1958 } 1959 } 1960 1961 /* Print why exec failed, avoiding stdio. */ 1962 void MAKE_ATTR_DEAD 1963 execDie(const char *af, const char *av) 1964 { 1965 Buffer buf; 1966 1967 Buf_Init(&buf); 1968 Buf_AddStr(&buf, progname); 1969 Buf_AddStr(&buf, ": "); 1970 Buf_AddStr(&buf, af); 1971 Buf_AddStr(&buf, "("); 1972 Buf_AddStr(&buf, av); 1973 Buf_AddStr(&buf, ") failed ("); 1974 Buf_AddStr(&buf, strerror(errno)); 1975 Buf_AddStr(&buf, ")\n"); 1976 1977 write_all(STDERR_FILENO, buf.data, buf.len); 1978 1979 Buf_Done(&buf); 1980 _exit(1); 1981 } 1982 1983 /* purge any relative paths */ 1984 static void 1985 purge_relative_cached_realpaths(void) 1986 { 1987 HashEntry *he, *nhe; 1988 HashIter hi; 1989 1990 HashIter_Init(&hi, &cached_realpaths); 1991 he = HashIter_Next(&hi); 1992 while (he != NULL) { 1993 nhe = HashIter_Next(&hi); 1994 if (he->key[0] != '/') { 1995 DEBUG1(DIR, "cached_realpath: purging %s\n", he->key); 1996 HashTable_DeleteEntry(&cached_realpaths, he); 1997 /* 1998 * XXX: What about the allocated he->value? Either 1999 * free them or document why they cannot be freed. 2000 */ 2001 } 2002 he = nhe; 2003 } 2004 } 2005 2006 char * 2007 cached_realpath(const char *pathname, char *resolved) 2008 { 2009 const char *rp; 2010 2011 if (pathname == NULL || pathname[0] == '\0') 2012 return NULL; 2013 2014 rp = HashTable_FindValue(&cached_realpaths, pathname); 2015 if (rp != NULL) { 2016 /* a hit */ 2017 strncpy(resolved, rp, MAXPATHLEN); 2018 resolved[MAXPATHLEN - 1] = '\0'; 2019 return resolved; 2020 } 2021 2022 rp = realpath(pathname, resolved); 2023 if (rp != NULL) { 2024 HashTable_Set(&cached_realpaths, pathname, bmake_strdup(rp)); 2025 DEBUG2(DIR, "cached_realpath: %s -> %s\n", pathname, rp); 2026 return resolved; 2027 } 2028 2029 /* should we negative-cache? */ 2030 return NULL; 2031 } 2032 2033 /* 2034 * Return true if we should die without noise. 2035 * For example our failing child was a sub-make or failure happened elsewhere. 2036 */ 2037 bool 2038 shouldDieQuietly(GNode *gn, int bf) 2039 { 2040 static int quietly = -1; 2041 2042 if (quietly < 0) { 2043 if (DEBUG(JOB) || 2044 !GetBooleanExpr("${.MAKE.DIE_QUIETLY}", true)) 2045 quietly = 0; 2046 else if (bf >= 0) 2047 quietly = bf; 2048 else 2049 quietly = (gn != NULL && (gn->type & OP_MAKE)) ? 1 : 0; 2050 } 2051 return quietly != 0; 2052 } 2053 2054 static void 2055 SetErrorVars(GNode *gn) 2056 { 2057 StringListNode *ln; 2058 2059 /* 2060 * We can print this even if there is no .ERROR target. 2061 */ 2062 Global_Set(".ERROR_TARGET", gn->name); 2063 Global_Delete(".ERROR_CMD"); 2064 2065 for (ln = gn->commands.first; ln != NULL; ln = ln->next) { 2066 const char *cmd = ln->datum; 2067 2068 if (cmd == NULL) 2069 break; 2070 Global_Append(".ERROR_CMD", cmd); 2071 } 2072 } 2073 2074 /* 2075 * Print some helpful information in case of an error. 2076 * The caller should exit soon after calling this function. 2077 */ 2078 void 2079 PrintOnError(GNode *gn, const char *msg) 2080 { 2081 static GNode *errorNode = NULL; 2082 2083 if (DEBUG(HASH)) { 2084 Targ_Stats(); 2085 Var_Stats(); 2086 } 2087 2088 if (errorNode != NULL) 2089 return; /* we've been here! */ 2090 2091 if (msg != NULL) 2092 printf("%s", msg); 2093 printf("\n%s: stopped in %s\n", progname, curdir); 2094 2095 /* we generally want to keep quiet if a sub-make died */ 2096 if (shouldDieQuietly(gn, -1)) 2097 return; 2098 2099 if (gn != NULL) 2100 SetErrorVars(gn); 2101 2102 { 2103 char *errorVarsValues; 2104 (void)Var_Subst("${MAKE_PRINT_VAR_ON_ERROR:@v@$v='${$v}'\n@}", 2105 SCOPE_GLOBAL, VARE_WANTRES, &errorVarsValues); 2106 /* TODO: handle errors */ 2107 printf("%s", errorVarsValues); 2108 free(errorVarsValues); 2109 } 2110 2111 fflush(stdout); 2112 2113 /* 2114 * Finally, see if there is a .ERROR target, and run it if so. 2115 */ 2116 errorNode = Targ_FindNode(".ERROR"); 2117 if (errorNode != NULL) { 2118 errorNode->type |= OP_SPECIAL; 2119 Compat_Make(errorNode, errorNode); 2120 } 2121 } 2122 2123 void 2124 Main_ExportMAKEFLAGS(bool first) 2125 { 2126 static bool once = true; 2127 const char *expr; 2128 char *s; 2129 2130 if (once != first) 2131 return; 2132 once = false; 2133 2134 expr = "${.MAKEFLAGS} ${.MAKEOVERRIDES:O:u:@v@$v=${$v:Q}@}"; 2135 (void)Var_Subst(expr, SCOPE_CMDLINE, VARE_WANTRES, &s); 2136 /* TODO: handle errors */ 2137 if (s[0] != '\0') { 2138 #ifdef POSIX 2139 setenv("MAKEFLAGS", s, 1); 2140 #else 2141 setenv("MAKE", s, 1); 2142 #endif 2143 } 2144 } 2145 2146 char * 2147 getTmpdir(void) 2148 { 2149 static char *tmpdir = NULL; 2150 struct stat st; 2151 2152 if (tmpdir != NULL) 2153 return tmpdir; 2154 2155 /* Honor $TMPDIR but only if it is valid. Ensure it ends with '/'. */ 2156 (void)Var_Subst("${TMPDIR:tA:U" _PATH_TMP ":S,/$,,W}/", 2157 SCOPE_GLOBAL, VARE_WANTRES, &tmpdir); 2158 /* TODO: handle errors */ 2159 2160 if (stat(tmpdir, &st) < 0 || !S_ISDIR(st.st_mode)) { 2161 free(tmpdir); 2162 tmpdir = bmake_strdup(_PATH_TMP); 2163 } 2164 return tmpdir; 2165 } 2166 2167 /* 2168 * Create and open a temp file using "pattern". 2169 * If out_fname is provided, set it to a copy of the filename created. 2170 * Otherwise unlink the file once open. 2171 */ 2172 int 2173 mkTempFile(const char *pattern, char *tfile, size_t tfile_sz) 2174 { 2175 static char *tmpdir = NULL; 2176 char tbuf[MAXPATHLEN]; 2177 int fd; 2178 2179 if (pattern == NULL) 2180 pattern = TMPPAT; 2181 if (tmpdir == NULL) 2182 tmpdir = getTmpdir(); 2183 if (tfile == NULL) { 2184 tfile = tbuf; 2185 tfile_sz = sizeof tbuf; 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
Indexes created Tue Sep 23 07:09:52 GMT 2025