main.c revision 1.553
1 /* $NetBSD: main.c,v 1.553 2021/12/27 21:27:25 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 1.553 2021/12/27 21:27:25 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 /* Let the filename be modified by the pid */ 220 if (strcmp(fname + len - 3, ".%d") == 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 usage(); 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 FStr xpath; 753 754 if (path.str == NULL || path.str[0] == '\0') { 755 FStr_Done(&path); 756 return false; 757 } 758 759 /* expand variable substitutions */ 760 xpath = FStr_InitRefer(path.str); 761 if (strchr(path.str, '$') != 0) { 762 char *expanded; 763 (void)Var_Subst(path.str, SCOPE_GLOBAL, VARE_WANTRES, &expanded); 764 /* TODO: handle errors */ 765 xpath = FStr_InitOwn(expanded); 766 } 767 768 (void)Main_SetObjdir(writable, "%s%s", xpath.str, suffix); 769 770 FStr_Done(&xpath); 771 FStr_Done(&path); 772 return true; 773 } 774 775 /* 776 * Splits str into words, adding them to the list. 777 * The string must be kept alive as long as the list. 778 */ 779 int 780 str2Lst_Append(StringList *lp, char *str) 781 { 782 char *cp; 783 int n; 784 785 const char *sep = " \t"; 786 787 for (n = 0, cp = strtok(str, sep); cp != NULL; cp = strtok(NULL, sep)) { 788 Lst_Append(lp, cp); 789 n++; 790 } 791 return n; 792 } 793 794 #ifdef SIGINFO 795 /*ARGSUSED*/ 796 static void 797 siginfo(int signo MAKE_ATTR_UNUSED) 798 { 799 char dir[MAXPATHLEN]; 800 char str[2 * MAXPATHLEN]; 801 int len; 802 if (getcwd(dir, sizeof dir) == NULL) 803 return; 804 len = snprintf(str, sizeof str, "%s: Working in: %s\n", progname, dir); 805 if (len > 0) 806 (void)write(STDERR_FILENO, str, (size_t)len); 807 } 808 #endif 809 810 /* Allow makefiles some control over the mode we run in. */ 811 static void 812 MakeMode(void) 813 { 814 char *mode; 815 816 (void)Var_Subst("${" MAKE_MODE ":tl}", SCOPE_GLOBAL, VARE_WANTRES, &mode); 817 /* TODO: handle errors */ 818 819 if (mode[0] != '\0') { 820 if (strstr(mode, "compat") != NULL) { 821 opts.compatMake = true; 822 forceJobs = false; 823 } 824 #if USE_META 825 if (strstr(mode, "meta") != NULL) 826 meta_mode_init(mode); 827 #endif 828 } 829 830 free(mode); 831 } 832 833 static void 834 PrintVar(const char *varname, bool expandVars) 835 { 836 if (strchr(varname, '$') != NULL) { 837 char *evalue; 838 (void)Var_Subst(varname, SCOPE_GLOBAL, VARE_WANTRES, &evalue); 839 /* TODO: handle errors */ 840 printf("%s\n", evalue); 841 free(evalue); 842 843 } else if (expandVars) { 844 char *expr = str_concat3("${", varname, "}"); 845 char *evalue; 846 (void)Var_Subst(expr, SCOPE_GLOBAL, VARE_WANTRES, &evalue); 847 /* TODO: handle errors */ 848 free(expr); 849 printf("%s\n", evalue); 850 free(evalue); 851 852 } else { 853 FStr value = Var_Value(SCOPE_GLOBAL, varname); 854 printf("%s\n", value.str != NULL ? value.str : ""); 855 FStr_Done(&value); 856 } 857 } 858 859 /* 860 * Return a bool based on a variable. 861 * 862 * If the knob is not set, return the fallback. 863 * If set, anything that looks or smells like "No", "False", "Off", "0", etc. 864 * is false, otherwise true. 865 */ 866 static bool 867 GetBooleanExpr(const char *expr, bool fallback) 868 { 869 char *value; 870 bool res; 871 872 (void)Var_Subst(expr, SCOPE_GLOBAL, VARE_WANTRES, &value); 873 /* TODO: handle errors */ 874 res = ParseBoolean(value, fallback); 875 free(value); 876 return res; 877 } 878 879 static void 880 doPrintVars(void) 881 { 882 StringListNode *ln; 883 bool expandVars; 884 885 if (opts.printVars == PVM_EXPANDED) 886 expandVars = true; 887 else if (opts.debugVflag) 888 expandVars = false; 889 else 890 expandVars = GetBooleanExpr("${.MAKE.EXPAND_VARIABLES}", 891 false); 892 893 for (ln = opts.variables.first; ln != NULL; ln = ln->next) { 894 const char *varname = ln->datum; 895 PrintVar(varname, expandVars); 896 } 897 } 898 899 static bool 900 runTargets(void) 901 { 902 GNodeList targs = LST_INIT; /* target nodes to create */ 903 bool outOfDate; /* false if all targets up to date */ 904 905 /* 906 * Have now read the entire graph and need to make a list of 907 * targets to create. If none was given on the command line, 908 * we consult the parsing module to find the main target(s) 909 * to create. 910 */ 911 if (Lst_IsEmpty(&opts.create)) 912 Parse_MainName(&targs); 913 else 914 Targ_FindList(&targs, &opts.create); 915 916 if (!opts.compatMake) { 917 /* 918 * Initialize job module before traversing the graph 919 * now that any .BEGIN and .END targets have been read. 920 * This is done only if the -q flag wasn't given 921 * (to prevent the .BEGIN from being executed should 922 * it exist). 923 */ 924 if (!opts.query) { 925 Job_Init(); 926 jobsRunning = true; 927 } 928 929 /* Traverse the graph, checking on all the targets */ 930 outOfDate = Make_Run(&targs); 931 } else { 932 /* 933 * Compat_Init will take care of creating all the 934 * targets as well as initializing the module. 935 */ 936 Compat_Run(&targs); 937 outOfDate = false; 938 } 939 Lst_Done(&targs); /* Don't free the targets themselves. */ 940 return outOfDate; 941 } 942 943 /* 944 * Set up the .TARGETS variable to contain the list of targets to be 945 * created. If none specified, make the variable empty -- the parser 946 * will fill the thing in with the default or .MAIN target. 947 */ 948 static void 949 InitVarTargets(void) 950 { 951 StringListNode *ln; 952 953 if (Lst_IsEmpty(&opts.create)) { 954 Global_Set(".TARGETS", ""); 955 return; 956 } 957 958 for (ln = opts.create.first; ln != NULL; ln = ln->next) { 959 const char *name = ln->datum; 960 Global_Append(".TARGETS", name); 961 } 962 } 963 964 static void 965 InitRandom(void) 966 { 967 struct timeval tv; 968 969 gettimeofday(&tv, NULL); 970 srandom((unsigned int)(tv.tv_sec + tv.tv_usec)); 971 } 972 973 static const char * 974 InitVarMachine(const struct utsname *utsname MAKE_ATTR_UNUSED) 975 { 976 const char *machine = getenv("MACHINE"); 977 if (machine != NULL) 978 return machine; 979 980 #if defined(MAKE_NATIVE) 981 return utsname->machine; 982 #elif defined(MAKE_MACHINE) 983 return MAKE_MACHINE; 984 #else 985 return "unknown"; 986 #endif 987 } 988 989 static const char * 990 InitVarMachineArch(void) 991 { 992 const char *env = getenv("MACHINE_ARCH"); 993 if (env != NULL) 994 return env; 995 996 #ifdef MAKE_NATIVE 997 { 998 struct utsname utsname; 999 static char machine_arch_buf[sizeof utsname.machine]; 1000 const int mib[2] = { CTL_HW, HW_MACHINE_ARCH }; 1001 size_t len = sizeof machine_arch_buf; 1002 1003 if (sysctl(mib, (unsigned int)__arraycount(mib), 1004 machine_arch_buf, &len, NULL, 0) < 0) { 1005 (void)fprintf(stderr, "%s: sysctl failed (%s).\n", 1006 progname, strerror(errno)); 1007 exit(2); 1008 } 1009 1010 return machine_arch_buf; 1011 } 1012 #elif defined(MACHINE_ARCH) 1013 return MACHINE_ARCH; 1014 #elif defined(MAKE_MACHINE_ARCH) 1015 return MAKE_MACHINE_ARCH; 1016 #else 1017 return "unknown"; 1018 #endif 1019 } 1020 1021 #ifndef NO_PWD_OVERRIDE 1022 /* 1023 * All this code is so that we know where we are when we start up 1024 * on a different machine with pmake. 1025 * 1026 * XXX: Make no longer has "local" and "remote" mode. Is this code still 1027 * necessary? 1028 * 1029 * Overriding getcwd() with $PWD totally breaks MAKEOBJDIRPREFIX 1030 * since the value of curdir can vary depending on how we got 1031 * here. Ie sitting at a shell prompt (shell that provides $PWD) 1032 * or via subdir.mk in which case its likely a shell which does 1033 * not provide it. 1034 * 1035 * So, to stop it breaking this case only, we ignore PWD if 1036 * MAKEOBJDIRPREFIX is set or MAKEOBJDIR contains a variable expression. 1037 */ 1038 static void 1039 HandlePWD(const struct stat *curdir_st) 1040 { 1041 char *pwd; 1042 FStr prefix, makeobjdir; 1043 struct stat pwd_st; 1044 1045 if (ignorePWD || (pwd = getenv("PWD")) == NULL) 1046 return; 1047 1048 prefix = Var_Value(SCOPE_CMDLINE, "MAKEOBJDIRPREFIX"); 1049 if (prefix.str != NULL) { 1050 FStr_Done(&prefix); 1051 return; 1052 } 1053 1054 makeobjdir = Var_Value(SCOPE_CMDLINE, "MAKEOBJDIR"); 1055 if (makeobjdir.str != NULL && strchr(makeobjdir.str, '$') != NULL) 1056 goto ignore_pwd; 1057 1058 if (stat(pwd, &pwd_st) == 0 && 1059 curdir_st->st_ino == pwd_st.st_ino && 1060 curdir_st->st_dev == pwd_st.st_dev) 1061 (void)strncpy(curdir, pwd, MAXPATHLEN); 1062 1063 ignore_pwd: 1064 FStr_Done(&makeobjdir); 1065 } 1066 #endif 1067 1068 /* 1069 * Find the .OBJDIR. If MAKEOBJDIRPREFIX, or failing that, MAKEOBJDIR is set 1070 * in the environment, try only that value and fall back to .CURDIR if it 1071 * does not exist. 1072 * 1073 * Otherwise, try _PATH_OBJDIR.MACHINE-MACHINE_ARCH, _PATH_OBJDIR.MACHINE, 1074 * and finally _PATH_OBJDIRPREFIX`pwd`, in that order. If none of these 1075 * paths exist, just use .CURDIR. 1076 */ 1077 static void 1078 InitObjdir(const char *machine, const char *machine_arch) 1079 { 1080 bool writable; 1081 1082 Dir_InitCur(curdir); 1083 writable = GetBooleanExpr("${MAKE_OBJDIR_CHECK_WRITABLE}", true); 1084 (void)Main_SetObjdir(false, "%s", curdir); 1085 1086 if (!SetVarObjdir(writable, "MAKEOBJDIRPREFIX", curdir) && 1087 !SetVarObjdir(writable, "MAKEOBJDIR", "") && 1088 !Main_SetObjdir(writable, "%s.%s-%s", _PATH_OBJDIR, machine, machine_arch) && 1089 !Main_SetObjdir(writable, "%s.%s", _PATH_OBJDIR, machine) && 1090 !Main_SetObjdir(writable, "%s", _PATH_OBJDIR)) 1091 (void)Main_SetObjdir(writable, "%s%s", _PATH_OBJDIRPREFIX, curdir); 1092 } 1093 1094 /* get rid of resource limit on file descriptors */ 1095 static void 1096 UnlimitFiles(void) 1097 { 1098 #if defined(MAKE_NATIVE) || (defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE)) 1099 struct rlimit rl; 1100 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 && 1101 rl.rlim_cur != rl.rlim_max) { 1102 rl.rlim_cur = rl.rlim_max; 1103 (void)setrlimit(RLIMIT_NOFILE, &rl); 1104 } 1105 #endif 1106 } 1107 1108 static void 1109 CmdOpts_Init(void) 1110 { 1111 opts.compatMake = false; 1112 memset(&opts.debug, 0, sizeof(opts.debug)); 1113 /* opts.debug_file has already been initialized earlier */ 1114 opts.strict = false; 1115 opts.debugVflag = false; 1116 opts.checkEnvFirst = false; 1117 Lst_Init(&opts.makefiles); 1118 opts.ignoreErrors = false; /* Pay attention to non-zero returns */ 1119 opts.maxJobs = 1; 1120 opts.keepgoing = false; /* Stop on error */ 1121 opts.noRecursiveExecute = false; /* Execute all .MAKE targets */ 1122 opts.noExecute = false; /* Execute all commands */ 1123 opts.query = false; 1124 opts.noBuiltins = false; /* Read the built-in rules */ 1125 opts.silent = false; /* Print commands as executed */ 1126 opts.touch = false; 1127 opts.printVars = PVM_NONE; 1128 Lst_Init(&opts.variables); 1129 opts.parseWarnFatal = false; 1130 opts.enterFlag = false; 1131 opts.varNoExportEnv = false; 1132 Lst_Init(&opts.create); 1133 } 1134 1135 /* 1136 * Initialize MAKE and .MAKE to the path of the executable, so that it can be 1137 * found by execvp(3) and the shells, even after a chdir. 1138 * 1139 * If it's a relative path and contains a '/', resolve it to an absolute path. 1140 * Otherwise keep it as is, assuming it will be found in the PATH. 1141 */ 1142 static void 1143 InitVarMake(const char *argv0) 1144 { 1145 const char *make = argv0; 1146 1147 if (argv0[0] != '/' && strchr(argv0, '/') != NULL) { 1148 char pathbuf[MAXPATHLEN]; 1149 const char *abspath = cached_realpath(argv0, pathbuf); 1150 struct stat st; 1151 if (abspath != NULL && abspath[0] == '/' && 1152 stat(make, &st) == 0) 1153 make = abspath; 1154 } 1155 1156 Global_Set("MAKE", make); 1157 Global_Set(".MAKE", make); 1158 } 1159 1160 /* 1161 * Add the directories from the colon-separated syspath to defSysIncPath. 1162 * After returning, the contents of syspath is unspecified. 1163 */ 1164 static void 1165 InitDefSysIncPath(char *syspath) 1166 { 1167 static char defsyspath[] = _PATH_DEFSYSPATH; 1168 char *start, *cp; 1169 1170 /* 1171 * If no user-supplied system path was given (through the -m option) 1172 * add the directories from the DEFSYSPATH (more than one may be given 1173 * as dir1:...:dirn) to the system include path. 1174 */ 1175 if (syspath == NULL || syspath[0] == '\0') 1176 syspath = defsyspath; 1177 else 1178 syspath = bmake_strdup(syspath); 1179 1180 for (start = syspath; *start != '\0'; start = cp) { 1181 for (cp = start; *cp != '\0' && *cp != ':'; cp++) 1182 continue; 1183 if (*cp == ':') 1184 *cp++ = '\0'; 1185 1186 /* look for magic parent directory search string */ 1187 if (strncmp(start, ".../", 4) == 0) { 1188 char *dir = Dir_FindHereOrAbove(curdir, start + 4); 1189 if (dir != NULL) { 1190 (void)SearchPath_Add(defSysIncPath, dir); 1191 free(dir); 1192 } 1193 } else { 1194 (void)SearchPath_Add(defSysIncPath, start); 1195 } 1196 } 1197 1198 if (syspath != defsyspath) 1199 free(syspath); 1200 } 1201 1202 static void 1203 ReadBuiltinRules(void) 1204 { 1205 StringListNode *ln; 1206 StringList sysMkFiles = LST_INIT; 1207 1208 SearchPath_Expand( 1209 Lst_IsEmpty(&sysIncPath->dirs) ? defSysIncPath : sysIncPath, 1210 _PATH_DEFSYSMK, 1211 &sysMkFiles); 1212 if (Lst_IsEmpty(&sysMkFiles)) 1213 Fatal("%s: no system rules (%s).", progname, _PATH_DEFSYSMK); 1214 1215 for (ln = sysMkFiles.first; ln != NULL; ln = ln->next) 1216 if (ReadMakefile(ln->datum)) 1217 break; 1218 1219 if (ln == NULL) 1220 Fatal("%s: cannot open %s.", 1221 progname, (const char *)sysMkFiles.first->datum); 1222 1223 /* 1224 * Free the list nodes but not the actual filenames since these may 1225 * still be used in GNodes. 1226 * 1227 * TODO: Check whether the above is still true after Str_Intern has 1228 * been added. 1229 */ 1230 Lst_Done(&sysMkFiles); 1231 } 1232 1233 static void 1234 InitMaxJobs(void) 1235 { 1236 char *value; 1237 int n; 1238 1239 if (forceJobs || opts.compatMake || 1240 !Var_Exists(SCOPE_GLOBAL, ".MAKE.JOBS")) 1241 return; 1242 1243 (void)Var_Subst("${.MAKE.JOBS}", SCOPE_GLOBAL, VARE_WANTRES, &value); 1244 /* TODO: handle errors */ 1245 n = (int)strtol(value, NULL, 0); 1246 if (n < 1) { 1247 (void)fprintf(stderr, 1248 "%s: illegal value for .MAKE.JOBS " 1249 "-- must be positive integer!\n", 1250 progname); 1251 exit(2); /* Not 1 so -q can distinguish error */ 1252 } 1253 1254 if (n != opts.maxJobs) { 1255 Global_Append(MAKEFLAGS, "-j"); 1256 Global_Append(MAKEFLAGS, value); 1257 } 1258 1259 opts.maxJobs = n; 1260 maxJobTokens = opts.maxJobs; 1261 forceJobs = true; 1262 free(value); 1263 } 1264 1265 /* 1266 * For compatibility, look at the directories in the VPATH variable 1267 * and add them to the search path, if the variable is defined. The 1268 * variable's value is in the same format as the PATH environment 1269 * variable, i.e. <directory>:<directory>:<directory>... 1270 */ 1271 static void 1272 InitVpath(void) 1273 { 1274 char *vpath, savec, *path; 1275 if (!Var_Exists(SCOPE_CMDLINE, "VPATH")) 1276 return; 1277 1278 (void)Var_Subst("${VPATH}", SCOPE_CMDLINE, VARE_WANTRES, &vpath); 1279 /* TODO: handle errors */ 1280 path = vpath; 1281 do { 1282 char *cp; 1283 /* skip to end of directory */ 1284 for (cp = path; *cp != ':' && *cp != '\0'; cp++) 1285 continue; 1286 /* Save terminator character so know when to stop */ 1287 savec = *cp; 1288 *cp = '\0'; 1289 /* Add directory to search path */ 1290 (void)SearchPath_Add(&dirSearchPath, path); 1291 *cp = savec; 1292 path = cp + 1; 1293 } while (savec == ':'); 1294 free(vpath); 1295 } 1296 1297 static void 1298 ReadAllMakefiles(const StringList *makefiles) 1299 { 1300 StringListNode *ln; 1301 1302 for (ln = makefiles->first; ln != NULL; ln = ln->next) { 1303 const char *fname = ln->datum; 1304 if (!ReadMakefile(fname)) 1305 Fatal("%s: cannot open %s.", progname, fname); 1306 } 1307 } 1308 1309 static void 1310 ReadFirstDefaultMakefile(void) 1311 { 1312 StringListNode *ln; 1313 char *prefs; 1314 1315 (void)Var_Subst("${" MAKE_MAKEFILE_PREFERENCE "}", 1316 SCOPE_CMDLINE, VARE_WANTRES, &prefs); 1317 /* TODO: handle errors */ 1318 1319 /* 1320 * XXX: This should use a local list instead of opts.makefiles since 1321 * these makefiles do not come from the command line. They also have 1322 * different semantics in that only the first file that is found is 1323 * processed. See ReadAllMakefiles. 1324 */ 1325 (void)str2Lst_Append(&opts.makefiles, prefs); 1326 1327 for (ln = opts.makefiles.first; ln != NULL; ln = ln->next) 1328 if (ReadMakefile(ln->datum)) 1329 break; 1330 1331 free(prefs); 1332 } 1333 1334 /* 1335 * Initialize variables such as MAKE, MACHINE, .MAKEFLAGS. 1336 * Initialize a few modules. 1337 * Parse the arguments from MAKEFLAGS and the command line. 1338 */ 1339 static void 1340 main_Init(int argc, char **argv) 1341 { 1342 struct stat sa; 1343 const char *machine; 1344 const char *machine_arch; 1345 char *syspath = getenv("MAKESYSPATH"); 1346 struct utsname utsname; 1347 1348 /* default to writing debug to stderr */ 1349 opts.debug_file = stderr; 1350 1351 Str_Intern_Init(); 1352 HashTable_Init(&cached_realpaths); 1353 1354 #ifdef SIGINFO 1355 (void)bmake_signal(SIGINFO, siginfo); 1356 #endif 1357 1358 InitRandom(); 1359 1360 progname = str_basename(argv[0]); 1361 1362 UnlimitFiles(); 1363 1364 if (uname(&utsname) == -1) { 1365 (void)fprintf(stderr, "%s: uname failed (%s).\n", progname, 1366 strerror(errno)); 1367 exit(2); 1368 } 1369 1370 /* 1371 * Get the name of this type of MACHINE from utsname 1372 * so we can share an executable for similar machines. 1373 * (i.e. m68k: amiga hp300, mac68k, sun3, ...) 1374 * 1375 * Note that both MACHINE and MACHINE_ARCH are decided at 1376 * run-time. 1377 */ 1378 machine = InitVarMachine(&utsname); 1379 machine_arch = InitVarMachineArch(); 1380 1381 myPid = getpid(); /* remember this for vFork() */ 1382 1383 /* 1384 * Just in case MAKEOBJDIR wants us to do something tricky. 1385 */ 1386 Targ_Init(); 1387 Var_Init(); 1388 Global_Set(".MAKE.OS", utsname.sysname); 1389 Global_Set("MACHINE", machine); 1390 Global_Set("MACHINE_ARCH", machine_arch); 1391 #ifdef MAKE_VERSION 1392 Global_Set("MAKE_VERSION", MAKE_VERSION); 1393 #endif 1394 Global_Set(".newline", "\n"); /* handy for :@ loops */ 1395 #ifndef MAKEFILE_PREFERENCE_LIST 1396 /* This is the traditional preference for makefiles. */ 1397 # define MAKEFILE_PREFERENCE_LIST "makefile Makefile" 1398 #endif 1399 Global_Set(MAKE_MAKEFILE_PREFERENCE, MAKEFILE_PREFERENCE_LIST); 1400 Global_Set(MAKE_DEPENDFILE, ".depend"); 1401 1402 CmdOpts_Init(); 1403 allPrecious = false; /* Remove targets when interrupted */ 1404 deleteOnError = false; /* Historical default behavior */ 1405 jobsRunning = false; 1406 1407 maxJobTokens = opts.maxJobs; 1408 ignorePWD = false; 1409 1410 /* 1411 * Initialize the parsing, directory and variable modules to prepare 1412 * for the reading of inclusion paths and variable settings on the 1413 * command line 1414 */ 1415 1416 /* 1417 * Initialize various variables. 1418 * MAKE also gets this name, for compatibility 1419 * .MAKEFLAGS gets set to the empty string just in case. 1420 * MFLAGS also gets initialized empty, for compatibility. 1421 */ 1422 Parse_Init(); 1423 InitVarMake(argv[0]); 1424 Global_Set(MAKEFLAGS, ""); 1425 Global_Set(MAKEOVERRIDES, ""); 1426 Global_Set("MFLAGS", ""); 1427 Global_Set(".ALLTARGETS", ""); 1428 Var_Set(SCOPE_CMDLINE, MAKE_LEVEL ".ENV", MAKE_LEVEL_ENV); 1429 1430 /* Set some other useful variables. */ 1431 { 1432 char buf[64], *ep = getenv(MAKE_LEVEL_ENV); 1433 1434 makelevel = ep != NULL && ep[0] != '\0' ? atoi(ep) : 0; 1435 if (makelevel < 0) 1436 makelevel = 0; 1437 snprintf(buf, sizeof buf, "%d", makelevel); 1438 Global_Set(MAKE_LEVEL, buf); 1439 snprintf(buf, sizeof buf, "%u", myPid); 1440 Global_Set(".MAKE.PID", buf); 1441 snprintf(buf, sizeof buf, "%u", getppid()); 1442 Global_Set(".MAKE.PPID", buf); 1443 snprintf(buf, sizeof buf, "%u", getuid()); 1444 Global_Set(".MAKE.UID", buf); 1445 snprintf(buf, sizeof buf, "%u", getgid()); 1446 Global_Set(".MAKE.GID", buf); 1447 } 1448 if (makelevel > 0) { 1449 char pn[1024]; 1450 snprintf(pn, sizeof pn, "%s[%d]", progname, makelevel); 1451 progname = bmake_strdup(pn); 1452 } 1453 1454 #ifdef USE_META 1455 meta_init(); 1456 #endif 1457 Dir_Init(); 1458 1459 #ifdef POSIX 1460 { 1461 char *p1 = explode(getenv("MAKEFLAGS")); 1462 Main_ParseArgLine(p1); 1463 free(p1); 1464 } 1465 #else 1466 /* 1467 * First snag any flags out of the MAKE environment variable. 1468 * (Note this is *not* MAKEFLAGS since /bin/make uses that and it's 1469 * in a different format). 1470 */ 1471 Main_ParseArgLine(getenv("MAKE")); 1472 #endif 1473 1474 if (getcwd(curdir, MAXPATHLEN) == NULL) { 1475 (void)fprintf(stderr, "%s: getcwd: %s.\n", 1476 progname, strerror(errno)); 1477 exit(2); 1478 } 1479 1480 MainParseArgs(argc, argv); 1481 1482 if (opts.enterFlag) 1483 printf("%s: Entering directory `%s'\n", progname, curdir); 1484 1485 if (stat(curdir, &sa) == -1) { 1486 (void)fprintf(stderr, "%s: %s: %s.\n", 1487 progname, curdir, strerror(errno)); 1488 exit(2); 1489 } 1490 1491 #ifndef NO_PWD_OVERRIDE 1492 HandlePWD(&sa); 1493 #endif 1494 Global_Set(".CURDIR", curdir); 1495 1496 InitObjdir(machine, machine_arch); 1497 1498 Arch_Init(); 1499 Suff_Init(); 1500 Trace_Init(tracefile); 1501 1502 defaultNode = NULL; 1503 (void)time(&now); 1504 1505 Trace_Log(MAKESTART, NULL); 1506 1507 InitVarTargets(); 1508 1509 InitDefSysIncPath(syspath); 1510 } 1511 1512 /* 1513 * Read the system makefile followed by either makefile, Makefile or the 1514 * files given by the -f option. Exit on parse errors. 1515 */ 1516 static void 1517 main_ReadFiles(void) 1518 { 1519 1520 if (!opts.noBuiltins) 1521 ReadBuiltinRules(); 1522 1523 if (!Lst_IsEmpty(&opts.makefiles)) 1524 ReadAllMakefiles(&opts.makefiles); 1525 else 1526 ReadFirstDefaultMakefile(); 1527 } 1528 1529 /* Compute the dependency graph. */ 1530 static void 1531 main_PrepareMaking(void) 1532 { 1533 /* In particular suppress .depend for '-r -V .OBJDIR -f /dev/null' */ 1534 if (!opts.noBuiltins || opts.printVars == PVM_NONE) { 1535 (void)Var_Subst("${.MAKE.DEPENDFILE}", 1536 SCOPE_CMDLINE, VARE_WANTRES, &makeDependfile); 1537 if (makeDependfile[0] != '\0') { 1538 /* TODO: handle errors */ 1539 doing_depend = true; 1540 (void)ReadMakefile(makeDependfile); 1541 doing_depend = false; 1542 } 1543 } 1544 1545 if (enterFlagObj) 1546 printf("%s: Entering directory `%s'\n", progname, objdir); 1547 1548 MakeMode(); 1549 1550 { 1551 FStr makeflags = Var_Value(SCOPE_GLOBAL, MAKEFLAGS); 1552 Global_Append("MFLAGS", makeflags.str); 1553 FStr_Done(&makeflags); 1554 } 1555 1556 InitMaxJobs(); 1557 1558 if (!opts.compatMake && !forceJobs) 1559 opts.compatMake = true; 1560 1561 if (!opts.compatMake) 1562 Job_ServerStart(maxJobTokens, jp_0, jp_1); 1563 DEBUG5(JOB, "job_pipe %d %d, maxjobs %d, tokens %d, compat %d\n", 1564 jp_0, jp_1, opts.maxJobs, maxJobTokens, opts.compatMake ? 1 : 0); 1565 1566 if (opts.printVars == PVM_NONE) 1567 Main_ExportMAKEFLAGS(true); /* initial export */ 1568 1569 InitVpath(); 1570 1571 /* 1572 * Now that all search paths have been read for suffixes et al, it's 1573 * time to add the default search path to their lists... 1574 */ 1575 Suff_ExtendPaths(); 1576 1577 /* 1578 * Propagate attributes through :: dependency lists. 1579 */ 1580 Targ_Propagate(); 1581 1582 /* print the initial graph, if the user requested it */ 1583 if (DEBUG(GRAPH1)) 1584 Targ_PrintGraph(1); 1585 } 1586 1587 /* 1588 * Make the targets. 1589 * If the -v or -V options are given, print variables instead. 1590 * Return whether any of the targets is out-of-date. 1591 */ 1592 static bool 1593 main_Run(void) 1594 { 1595 if (opts.printVars != PVM_NONE) { 1596 /* print the values of any variables requested by the user */ 1597 doPrintVars(); 1598 return false; 1599 } else { 1600 return runTargets(); 1601 } 1602 } 1603 1604 /* Clean up after making the targets. */ 1605 static void 1606 main_CleanUp(void) 1607 { 1608 #ifdef CLEANUP 1609 Lst_DoneCall(&opts.variables, free); 1610 Lst_Done(&opts.makefiles); 1611 Lst_DoneCall(&opts.create, free); 1612 #endif 1613 1614 if (DEBUG(GRAPH2)) 1615 Targ_PrintGraph(2); 1616 1617 Trace_Log(MAKEEND, NULL); 1618 1619 if (enterFlagObj) 1620 printf("%s: Leaving directory `%s'\n", progname, objdir); 1621 if (opts.enterFlag) 1622 printf("%s: Leaving directory `%s'\n", progname, curdir); 1623 1624 #ifdef USE_META 1625 meta_finish(); 1626 #endif 1627 Suff_End(); 1628 Targ_End(); 1629 Arch_End(); 1630 Var_End(); 1631 Parse_End(); 1632 Dir_End(); 1633 Job_End(); 1634 Trace_End(); 1635 Str_Intern_End(); 1636 } 1637 1638 /* Determine the exit code. */ 1639 static int 1640 main_Exit(bool outOfDate) 1641 { 1642 if (opts.strict && (main_errors > 0 || Parse_NumErrors() > 0)) 1643 return 2; /* Not 1 so -q can distinguish error */ 1644 return outOfDate ? 1 : 0; 1645 } 1646 1647 int 1648 main(int argc, char **argv) 1649 { 1650 bool outOfDate; 1651 1652 main_Init(argc, argv); 1653 main_ReadFiles(); 1654 main_PrepareMaking(); 1655 outOfDate = main_Run(); 1656 main_CleanUp(); 1657 return main_Exit(outOfDate); 1658 } 1659 1660 /* 1661 * Open and parse the given makefile, with all its side effects. 1662 * Return false if the file could not be opened. 1663 */ 1664 static bool 1665 ReadMakefile(const char *fname) 1666 { 1667 int fd; 1668 char *name, *path = NULL; 1669 1670 if (strcmp(fname, "-") == 0) { 1671 Parse_File(NULL /*stdin*/, -1); 1672 Var_Set(SCOPE_INTERNAL, "MAKEFILE", ""); 1673 } else { 1674 /* if we've chdir'd, rebuild the path name */ 1675 if (strcmp(curdir, objdir) != 0 && *fname != '/') { 1676 path = str_concat3(curdir, "/", fname); 1677 fd = open(path, O_RDONLY); 1678 if (fd != -1) { 1679 fname = path; 1680 goto found; 1681 } 1682 free(path); 1683 1684 /* If curdir failed, try objdir (ala .depend) */ 1685 path = str_concat3(objdir, "/", fname); 1686 fd = open(path, O_RDONLY); 1687 if (fd != -1) { 1688 fname = path; 1689 goto found; 1690 } 1691 } else { 1692 fd = open(fname, O_RDONLY); 1693 if (fd != -1) 1694 goto found; 1695 } 1696 /* look in -I and system include directories. */ 1697 name = Dir_FindFile(fname, parseIncPath); 1698 if (name == NULL) { 1699 SearchPath *sysInc = Lst_IsEmpty(&sysIncPath->dirs) 1700 ? defSysIncPath : sysIncPath; 1701 name = Dir_FindFile(fname, sysInc); 1702 } 1703 if (name == NULL || (fd = open(name, O_RDONLY)) == -1) { 1704 free(name); 1705 free(path); 1706 return false; 1707 } 1708 fname = name; 1709 /* 1710 * set the MAKEFILE variable desired by System V fans -- the 1711 * placement of the setting here means it gets set to the last 1712 * makefile specified, as it is set by SysV make. 1713 */ 1714 found: 1715 if (!doing_depend) 1716 Var_Set(SCOPE_INTERNAL, "MAKEFILE", fname); 1717 Parse_File(fname, fd); 1718 } 1719 free(path); 1720 return true; 1721 } 1722 1723 /* 1724 * Execute the command in cmd, and return its output (only stdout, not 1725 * stderr). In the output, replace newlines with spaces. 1726 * 1727 * Results: 1728 * The output of the command, can be empty. 1729 * *errfmt returns a format string describing the command failure, 1730 * if any, using a single %s conversion specification. 1731 * TODO: replace errfmt with an actual error message. 1732 */ 1733 char * 1734 Cmd_Exec(const char *cmd, const char **errfmt) 1735 { 1736 const char *args[4]; /* Arguments for invoking the shell */ 1737 int pipefds[2]; 1738 int cpid; /* Child PID */ 1739 int pid; /* PID from wait() */ 1740 int status; /* command exit status */ 1741 Buffer buf; /* buffer to store the result */ 1742 ssize_t bytes_read; 1743 char *res; /* result */ 1744 size_t res_len; 1745 char *cp; 1746 int savederr; /* saved errno */ 1747 1748 *errfmt = NULL; 1749 1750 if (shellName == NULL) 1751 Shell_Init(); 1752 1753 args[0] = shellName; 1754 args[1] = "-c"; 1755 args[2] = cmd; 1756 args[3] = NULL; 1757 1758 if (pipe(pipefds) == -1) { 1759 *errfmt = "Couldn't create pipe for \"%s\""; 1760 goto bad; 1761 } 1762 1763 Var_ReexportVars(); 1764 1765 switch (cpid = vfork()) { 1766 case 0: 1767 (void)close(pipefds[0]); 1768 (void)dup2(pipefds[1], 1); 1769 (void)close(pipefds[1]); 1770 1771 (void)execv(shellPath, UNCONST(args)); 1772 _exit(1); 1773 /* NOTREACHED */ 1774 1775 case -1: 1776 *errfmt = "Couldn't exec \"%s\""; 1777 goto bad; 1778 1779 default: 1780 (void)close(pipefds[1]); /* No need for the writing half */ 1781 1782 savederr = 0; 1783 Buf_Init(&buf); 1784 1785 do { 1786 char result[BUFSIZ]; 1787 bytes_read = read(pipefds[0], result, sizeof result); 1788 if (bytes_read > 0) 1789 Buf_AddBytes(&buf, result, (size_t)bytes_read); 1790 } while (bytes_read > 0 || 1791 (bytes_read == -1 && errno == EINTR)); 1792 if (bytes_read == -1) 1793 savederr = errno; 1794 1795 (void)close(pipefds[0]); /* Close the input side of the pipe. */ 1796 1797 while ((pid = waitpid(cpid, &status, 0)) != cpid && pid >= 0) 1798 JobReapChild(pid, status, false); 1799 1800 res_len = buf.len; 1801 res = Buf_DoneData(&buf); 1802 1803 if (savederr != 0) 1804 *errfmt = "Couldn't read shell's output for \"%s\""; 1805 1806 if (WIFSIGNALED(status)) 1807 *errfmt = "\"%s\" exited on a signal"; 1808 else if (WEXITSTATUS(status) != 0) 1809 *errfmt = "\"%s\" returned non-zero status"; 1810 1811 /* Convert newlines to spaces, strip the final newline. */ 1812 if (res_len > 0 && res[res_len - 1] == '\n') 1813 res[res_len - 1] = '\0'; 1814 for (cp = res; *cp != '\0'; cp++) 1815 if (*cp == '\n') 1816 *cp = ' '; 1817 break; 1818 } 1819 return res; 1820 bad: 1821 return bmake_strdup(""); 1822 } 1823 1824 /* 1825 * Print a printf-style error message. 1826 * 1827 * In default mode, this error message has no consequences, for compatibility 1828 * reasons, in particular it does not affect the exit status. Only in lint 1829 * mode (-dL) it does. 1830 */ 1831 void 1832 Error(const char *fmt, ...) 1833 { 1834 va_list ap; 1835 FILE *err_file; 1836 1837 err_file = opts.debug_file; 1838 if (err_file == stdout) 1839 err_file = stderr; 1840 (void)fflush(stdout); 1841 for (;;) { 1842 va_start(ap, fmt); 1843 fprintf(err_file, "%s: ", progname); 1844 (void)vfprintf(err_file, fmt, ap); 1845 va_end(ap); 1846 (void)fprintf(err_file, "\n"); 1847 (void)fflush(err_file); 1848 if (err_file == stderr) 1849 break; 1850 err_file = stderr; 1851 } 1852 main_errors++; 1853 } 1854 1855 /* 1856 * Wait for any running jobs to finish, then produce an error message, 1857 * finally exit immediately. 1858 * 1859 * Exiting immediately differs from Parse_Error, which exits only after the 1860 * current top-level makefile has been parsed completely. 1861 */ 1862 void 1863 Fatal(const char *fmt, ...) 1864 { 1865 va_list ap; 1866 1867 if (jobsRunning) 1868 Job_Wait(); 1869 1870 (void)fflush(stdout); 1871 va_start(ap, fmt); 1872 (void)vfprintf(stderr, fmt, ap); 1873 va_end(ap); 1874 (void)fprintf(stderr, "\n"); 1875 (void)fflush(stderr); 1876 1877 PrintOnError(NULL, NULL); 1878 1879 if (DEBUG(GRAPH2) || DEBUG(GRAPH3)) 1880 Targ_PrintGraph(2); 1881 Trace_Log(MAKEERROR, NULL); 1882 exit(2); /* Not 1 so -q can distinguish error */ 1883 } 1884 1885 /* 1886 * Major exception once jobs are being created. 1887 * Kills all jobs, prints a message and exits. 1888 */ 1889 void 1890 Punt(const char *fmt, ...) 1891 { 1892 va_list ap; 1893 1894 va_start(ap, fmt); 1895 (void)fflush(stdout); 1896 (void)fprintf(stderr, "%s: ", progname); 1897 (void)vfprintf(stderr, fmt, ap); 1898 va_end(ap); 1899 (void)fprintf(stderr, "\n"); 1900 (void)fflush(stderr); 1901 1902 PrintOnError(NULL, NULL); 1903 1904 DieHorribly(); 1905 } 1906 1907 /* Exit without giving a message. */ 1908 void 1909 DieHorribly(void) 1910 { 1911 if (jobsRunning) 1912 Job_AbortAll(); 1913 if (DEBUG(GRAPH2)) 1914 Targ_PrintGraph(2); 1915 Trace_Log(MAKEERROR, NULL); 1916 exit(2); /* Not 1 so -q can distinguish error */ 1917 } 1918 1919 /* 1920 * Called when aborting due to errors in child shell to signal abnormal exit. 1921 * The program exits. 1922 * Errors is the number of errors encountered in Make_Make. 1923 */ 1924 void 1925 Finish(int errs) 1926 { 1927 if (shouldDieQuietly(NULL, -1)) 1928 exit(2); 1929 Fatal("%d error%s", errs, errs == 1 ? "" : "s"); 1930 } 1931 1932 bool 1933 unlink_file(const char *file) 1934 { 1935 struct stat st; 1936 1937 if (lstat(file, &st) == -1) 1938 return false; 1939 1940 if (S_ISDIR(st.st_mode)) { 1941 errno = EISDIR; 1942 return false; 1943 } 1944 return unlink(file) == 0; 1945 } 1946 1947 static void 1948 write_all(int fd, const void *data, size_t n) 1949 { 1950 const char *mem = data; 1951 1952 while (n > 0) { 1953 ssize_t written = write(fd, mem, n); 1954 if (written == -1 && errno == EAGAIN) 1955 continue; 1956 if (written == -1) 1957 break; 1958 mem += written; 1959 n -= (size_t)written; 1960 } 1961 } 1962 1963 /* Print why exec failed, avoiding stdio. */ 1964 void MAKE_ATTR_DEAD 1965 execDie(const char *af, const char *av) 1966 { 1967 Buffer buf; 1968 1969 Buf_Init(&buf); 1970 Buf_AddStr(&buf, progname); 1971 Buf_AddStr(&buf, ": "); 1972 Buf_AddStr(&buf, af); 1973 Buf_AddStr(&buf, "("); 1974 Buf_AddStr(&buf, av); 1975 Buf_AddStr(&buf, ") failed ("); 1976 Buf_AddStr(&buf, strerror(errno)); 1977 Buf_AddStr(&buf, ")\n"); 1978 1979 write_all(STDERR_FILENO, buf.data, buf.len); 1980 1981 Buf_Done(&buf); 1982 _exit(1); 1983 } 1984 1985 /* purge any relative paths */ 1986 static void 1987 purge_relative_cached_realpaths(void) 1988 { 1989 HashEntry *he, *nhe; 1990 HashIter hi; 1991 1992 HashIter_Init(&hi, &cached_realpaths); 1993 he = HashIter_Next(&hi); 1994 while (he != NULL) { 1995 nhe = HashIter_Next(&hi); 1996 if (he->key[0] != '/') { 1997 DEBUG1(DIR, "cached_realpath: purging %s\n", he->key); 1998 HashTable_DeleteEntry(&cached_realpaths, he); 1999 /* 2000 * XXX: What about the allocated he->value? Either 2001 * free them or document why they cannot be freed. 2002 */ 2003 } 2004 he = nhe; 2005 } 2006 } 2007 2008 char * 2009 cached_realpath(const char *pathname, char *resolved) 2010 { 2011 const char *rp; 2012 2013 if (pathname == NULL || pathname[0] == '\0') 2014 return NULL; 2015 2016 rp = HashTable_FindValue(&cached_realpaths, pathname); 2017 if (rp != NULL) { 2018 /* a hit */ 2019 strncpy(resolved, rp, MAXPATHLEN); 2020 resolved[MAXPATHLEN - 1] = '\0'; 2021 return resolved; 2022 } 2023 2024 rp = realpath(pathname, resolved); 2025 if (rp != NULL) { 2026 HashTable_Set(&cached_realpaths, pathname, bmake_strdup(rp)); 2027 DEBUG2(DIR, "cached_realpath: %s -> %s\n", pathname, rp); 2028 return resolved; 2029 } 2030 2031 /* should we negative-cache? */ 2032 return NULL; 2033 } 2034 2035 /* 2036 * Return true if we should die without noise. 2037 * For example our failing child was a sub-make or failure happened elsewhere. 2038 */ 2039 bool 2040 shouldDieQuietly(GNode *gn, int bf) 2041 { 2042 static int quietly = -1; 2043 2044 if (quietly < 0) { 2045 if (DEBUG(JOB) || 2046 !GetBooleanExpr("${.MAKE.DIE_QUIETLY}", true)) 2047 quietly = 0; 2048 else if (bf >= 0) 2049 quietly = bf; 2050 else 2051 quietly = (gn != NULL && (gn->type & OP_MAKE)) ? 1 : 0; 2052 } 2053 return quietly != 0; 2054 } 2055 2056 static void 2057 SetErrorVars(GNode *gn) 2058 { 2059 StringListNode *ln; 2060 2061 /* 2062 * We can print this even if there is no .ERROR target. 2063 */ 2064 Global_Set(".ERROR_TARGET", gn->name); 2065 Global_Delete(".ERROR_CMD"); 2066 2067 for (ln = gn->commands.first; ln != NULL; ln = ln->next) { 2068 const char *cmd = ln->datum; 2069 2070 if (cmd == NULL) 2071 break; 2072 Global_Append(".ERROR_CMD", cmd); 2073 } 2074 } 2075 2076 /* 2077 * Print some helpful information in case of an error. 2078 * The caller should exit soon after calling this function. 2079 */ 2080 void 2081 PrintOnError(GNode *gn, const char *msg) 2082 { 2083 static GNode *errorNode = NULL; 2084 2085 if (DEBUG(HASH)) { 2086 Targ_Stats(); 2087 Var_Stats(); 2088 } 2089 2090 if (errorNode != NULL) 2091 return; /* we've been here! */ 2092 2093 if (msg != NULL) 2094 printf("%s", msg); 2095 printf("\n%s: stopped in %s\n", progname, curdir); 2096 2097 /* we generally want to keep quiet if a sub-make died */ 2098 if (shouldDieQuietly(gn, -1)) 2099 return; 2100 2101 if (gn != NULL) 2102 SetErrorVars(gn); 2103 2104 { 2105 char *errorVarsValues; 2106 (void)Var_Subst("${MAKE_PRINT_VAR_ON_ERROR:@v@$v='${$v}'\n@}", 2107 SCOPE_GLOBAL, VARE_WANTRES, &errorVarsValues); 2108 /* TODO: handle errors */ 2109 printf("%s", errorVarsValues); 2110 free(errorVarsValues); 2111 } 2112 2113 fflush(stdout); 2114 2115 /* 2116 * Finally, see if there is a .ERROR target, and run it if so. 2117 */ 2118 errorNode = Targ_FindNode(".ERROR"); 2119 if (errorNode != NULL) { 2120 errorNode->type |= OP_SPECIAL; 2121 Compat_Make(errorNode, errorNode); 2122 } 2123 } 2124 2125 void 2126 Main_ExportMAKEFLAGS(bool first) 2127 { 2128 static bool once = true; 2129 const char *expr; 2130 char *s; 2131 2132 if (once != first) 2133 return; 2134 once = false; 2135 2136 expr = "${.MAKEFLAGS} ${.MAKEOVERRIDES:O:u:@v@$v=${$v:Q}@}"; 2137 (void)Var_Subst(expr, SCOPE_CMDLINE, VARE_WANTRES, &s); 2138 /* TODO: handle errors */ 2139 if (s[0] != '\0') { 2140 #ifdef POSIX 2141 setenv("MAKEFLAGS", s, 1); 2142 #else 2143 setenv("MAKE", s, 1); 2144 #endif 2145 } 2146 } 2147 2148 char * 2149 getTmpdir(void) 2150 { 2151 static char *tmpdir = NULL; 2152 struct stat st; 2153 2154 if (tmpdir != NULL) 2155 return tmpdir; 2156 2157 /* Honor $TMPDIR but only if it is valid. Ensure it ends with '/'. */ 2158 (void)Var_Subst("${TMPDIR:tA:U" _PATH_TMP ":S,/$,,W}/", 2159 SCOPE_GLOBAL, VARE_WANTRES, &tmpdir); 2160 /* TODO: handle errors */ 2161 2162 if (stat(tmpdir, &st) < 0 || !S_ISDIR(st.st_mode)) { 2163 free(tmpdir); 2164 tmpdir = bmake_strdup(_PATH_TMP); 2165 } 2166 return tmpdir; 2167 } 2168 2169 /* 2170 * Create and open a temp file using "pattern". 2171 * If out_fname is provided, set it to a copy of the filename created. 2172 * Otherwise unlink the file once open. 2173 */ 2174 int 2175 mkTempFile(const char *pattern, char *tfile, size_t tfile_sz) 2176 { 2177 static char *tmpdir = NULL; 2178 char tbuf[MAXPATHLEN]; 2179 int fd; 2180 2181 if (pattern == NULL) 2182 pattern = TMPPAT; 2183 if (tmpdir == NULL) 2184 tmpdir = getTmpdir(); 2185 if (tfile == NULL) { 2186 tfile = tbuf; 2187 tfile_sz = sizeof tbuf; 2188 } 2189 if (pattern[0] == '/') { 2190 snprintf(tfile, tfile_sz, "%s", pattern); 2191 } else { 2192 snprintf(tfile, tfile_sz, "%s%s", tmpdir, pattern); 2193 } 2194 if ((fd = mkstemp(tfile)) < 0) 2195 Punt("Could not create temporary file %s: %s", tfile, 2196 strerror(errno)); 2197 if (tfile == tbuf) { 2198 unlink(tfile); /* we just want the descriptor */ 2199 } 2200 return fd; 2201 } 2202 2203 /* 2204 * Convert a string representation of a boolean into a boolean value. 2205 * Anything that looks like "No", "False", "Off", "0" etc. is false, 2206 * the empty string is the fallback, everything else is true. 2207 */ 2208 bool 2209 ParseBoolean(const char *s, bool fallback) 2210 { 2211 char ch = ch_tolower(s[0]); 2212 if (ch == '\0') 2213 return fallback; 2214 if (ch == '0' || ch == 'f' || ch == 'n') 2215 return false; 2216 if (ch == 'o') 2217 return ch_tolower(s[1]) != 'f'; 2218 return true; 2219 } 2220
Indexes created Mon Sep 22 21:09:42 GMT 2025