1/* $NetBSD: main.c,v 1.616 2024/05/19 17:55:54 sjg Exp $ */ 2 3/* 4 * Copyright (c) 1988, 1989, 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Adam de Boor. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35/* 36 * Copyright (c) 1989 by Berkeley Softworks 37 * All rights reserved. 38 * 39 * This code is derived from software contributed to Berkeley by 40 * Adam de Boor. 41 * 42 * Redistribution and use in source and binary forms, with or without 43 * modification, are permitted provided that the following conditions 44 * are met: 45 * 1. Redistributions of source code must retain the above copyright 46 * notice, this list of conditions and the following disclaimer. 47 * 2. Redistributions in binary form must reproduce the above copyright 48 * notice, this list of conditions and the following disclaimer in the 49 * documentation and/or other materials provided with the distribution. 50 * 3. All advertising materials mentioning features or use of this software 51 * must display the following acknowledgement: 52 * This product includes software developed by the University of 53 * California, Berkeley and its contributors. 54 * 4. Neither the name of the University nor the names of its contributors 55 * may be used to endorse or promote products derived from this software 56 * without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 68 * SUCH DAMAGE. 69 */ 70 71/* 72 * The main file for this entire program. Exit routines etc. reside here. 73 * 74 * Utility functions defined in this file: 75 * 76 * Main_ParseArgLine 77 * Parse and process command line arguments from a 78 * single string. Used to implement the special targets 79 * .MFLAGS and .MAKEFLAGS. 80 * 81 * Error Print a tagged error message. 82 * 83 * Fatal Print an error message and exit. 84 * 85 * Punt Abort all jobs and exit with a message. 86 * 87 * Finish Finish things up by printing the number of errors 88 * that occurred, and exit. 89 */ 90 91#include <sys/types.h> 92#include <sys/time.h> 93#include <sys/param.h> 94#include <sys/resource.h> 95#include <sys/stat.h> 96#if defined(MAKE_NATIVE) && defined(HAVE_SYSCTL) 97#include <sys/sysctl.h> 98#endif 99#include <sys/utsname.h> 100#include "wait.h" 101 102#include <errno.h> 103#include <signal.h> 104#include <stdarg.h> 105#include <time.h> 106 107#include "make.h" 108#include "dir.h" 109#include "job.h" 110#include "pathnames.h" 111#include "trace.h" 112 113/* "@(#)main.c 8.3 (Berkeley) 3/19/94" */ 114MAKE_RCSID("$NetBSD: main.c,v 1.616 2024/05/19 17:55:54 sjg Exp $"); 115#if defined(MAKE_NATIVE) 116__COPYRIGHT("@(#) Copyright (c) 1988, 1989, 1990, 1993 " 117 "The Regents of the University of California. " 118 "All rights reserved."); 119#endif 120 121#ifndef __arraycount 122# define __arraycount(__x) (sizeof(__x) / sizeof(__x[0])) 123#endif 124 125CmdOpts opts; 126time_t now; /* Time at start of make */ 127GNode *defaultNode; /* .DEFAULT node */ 128bool allPrecious; /* .PRECIOUS given on a line by itself */ 129bool deleteOnError; /* .DELETE_ON_ERROR: set */ 130 131static int maxJobTokens; /* -j argument */ 132static bool enterFlagObj; /* -w and objdir != srcdir */ 133 134static int jp_0 = -1, jp_1 = -1; /* ends of parent job pipe */ 135bool doing_depend; /* Set while reading .depend */ 136static bool jobsRunning; /* true if the jobs might be running */ 137static const char *tracefile; 138static bool ReadMakefile(const char *); 139static void purge_relative_cached_realpaths(void); 140 141static bool ignorePWD; /* if we use -C, PWD is meaningless */ 142static char objdir[MAXPATHLEN + 1]; /* where we chdir'ed to */ 143char curdir[MAXPATHLEN + 1]; /* Startup directory */ 144const char *progname; 145char *makeDependfile; 146pid_t myPid; 147int makelevel; 148 149bool forceJobs = false; 150static int main_errors = 0; 151static HashTable cached_realpaths; 152 153/* 154 * For compatibility with the POSIX version of MAKEFLAGS that includes 155 * all the options without '-', convert 'flags' to '-f -l -a -g -s '. 156 */ 157static char * 158explode(const char *flags) 159{ 160 char *exploded, *ep; 161 const char *p; 162 163 if (flags == NULL) 164 return NULL; 165 166 for (p = flags; *p != '\0'; p++) 167 if (!ch_isalpha(*p)) 168 return bmake_strdup(flags); 169 170 exploded = bmake_malloc((size_t)(p - flags) * 3 + 1); 171 for (p = flags, ep = exploded; *p != '\0'; p++) { 172 *ep++ = '-'; 173 *ep++ = *p; 174 *ep++ = ' '; 175 } 176 *ep = '\0'; 177 return exploded; 178} 179 180MAKE_ATTR_DEAD static void 181usage(void) 182{ 183 size_t prognameLen = strcspn(progname, "["); 184 185 (void)fprintf(stderr, 186"usage: %.*s [-BeikNnqrSstWwX]\n" 187" [-C directory] [-D variable] [-d flags] [-f makefile]\n" 188" [-I directory] [-J private] [-j max_jobs] [-m directory] [-T file]\n" 189" [-V variable] [-v variable] [variable=value] [target ...]\n", 190 (int)prognameLen, progname); 191 exit(2); 192} 193 194static void 195MainParseArgDebugFile(const char *arg) 196{ 197 const char *mode; 198 size_t len; 199 char *fname; 200 201 if (opts.debug_file != stdout && opts.debug_file != stderr) 202 fclose(opts.debug_file); 203 204 if (*arg == '+') { 205 arg++; 206 mode = "a"; 207 } else 208 mode = "w"; 209 210 if (strcmp(arg, "stdout") == 0) { 211 opts.debug_file = stdout; 212 return; 213 } 214 if (strcmp(arg, "stderr") == 0) { 215 opts.debug_file = stderr; 216 return; 217 } 218 219 len = strlen(arg); 220 fname = bmake_malloc(len + 20); 221 memcpy(fname, arg, len + 1); 222 223 /* Replace the trailing '%d' after '.%d' with the pid. */ 224 if (len >= 3 && memcmp(fname + len - 3, ".%d", 3) == 0) 225 snprintf(fname + len - 2, 20, "%d", getpid()); 226 227 opts.debug_file = fopen(fname, mode); 228 if (opts.debug_file == NULL) { 229 fprintf(stderr, "Cannot open debug file \"%s\"\n", fname); 230 exit(2); 231 } 232 free(fname); 233} 234 235static void 236MainParseArgDebug(const char *argvalue) 237{ 238 const char *modules; 239 DebugFlags debug = opts.debug; 240 241 for (modules = argvalue; *modules != '\0'; modules++) { 242 switch (*modules) { 243 case '0': /* undocumented, only intended for tests */ 244 memset(&debug, 0, sizeof(debug)); 245 break; 246 case 'A': 247 memset(&debug, ~0, sizeof(debug)); 248 break; 249 case 'a': 250 debug.DEBUG_ARCH = true; 251 break; 252 case 'C': 253 debug.DEBUG_CWD = true; 254 break; 255 case 'c': 256 debug.DEBUG_COND = true; 257 break; 258 case 'd': 259 debug.DEBUG_DIR = true; 260 break; 261 case 'e': 262 debug.DEBUG_ERROR = true; 263 break; 264 case 'f': 265 debug.DEBUG_FOR = true; 266 break; 267 case 'g': 268 if (modules[1] == '1') { 269 debug.DEBUG_GRAPH1 = true; 270 modules++; 271 } else if (modules[1] == '2') { 272 debug.DEBUG_GRAPH2 = true; 273 modules++; 274 } else if (modules[1] == '3') { 275 debug.DEBUG_GRAPH3 = true; 276 modules++; 277 } 278 break; 279 case 'h': 280 debug.DEBUG_HASH = true; 281 break; 282 case 'j': 283 debug.DEBUG_JOB = true; 284 break; 285 case 'L': 286 opts.strict = true; 287 break; 288 case 'l': 289 debug.DEBUG_LOUD = true; 290 break; 291 case 'M': 292 debug.DEBUG_META = true; 293 break; 294 case 'm': 295 debug.DEBUG_MAKE = true; 296 break; 297 case 'n': 298 debug.DEBUG_SCRIPT = true; 299 break; 300 case 'p': 301 debug.DEBUG_PARSE = true; 302 break; 303 case 's': 304 debug.DEBUG_SUFF = true; 305 break; 306 case 't': 307 debug.DEBUG_TARG = true; 308 break; 309 case 'V': 310 opts.debugVflag = true; 311 break; 312 case 'v': 313 debug.DEBUG_VAR = true; 314 break; 315 case 'x': 316 debug.DEBUG_SHELL = true; 317 break; 318 case 'F': 319 MainParseArgDebugFile(modules + 1); 320 goto finish; 321 default: 322 (void)fprintf(stderr, 323 "%s: illegal argument to d option -- %c\n", 324 progname, *modules); 325 usage(); 326 } 327 } 328 329finish: 330 opts.debug = debug; 331 332 setvbuf(opts.debug_file, NULL, _IONBF, 0); 333 if (opts.debug_file != stdout) 334 setvbuf(stdout, NULL, _IOLBF, 0); 335} 336 337/* Is path relative or does it contain any relative component "." or ".."? */ 338static bool 339IsRelativePath(const char *path) 340{ 341 const char *p; 342 343 if (path[0] != '/') 344 return true; 345 p = path; 346 while ((p = strstr(p, "/.")) != NULL) { 347 p += 2; 348 if (*p == '.') 349 p++; 350 if (*p == '/' || *p == '\0') 351 return true; 352 } 353 return false; 354} 355 356static void 357MainParseArgChdir(const char *argvalue) 358{ 359 struct stat sa, sb; 360 361 if (chdir(argvalue) == -1) { 362 (void)fprintf(stderr, "%s: chdir %s: %s\n", 363 progname, argvalue, strerror(errno)); 364 exit(2); /* Not 1 so -q can distinguish error */ 365 } 366 if (getcwd(curdir, MAXPATHLEN) == NULL) { 367 (void)fprintf(stderr, "%s: %s.\n", progname, strerror(errno)); 368 exit(2); 369 } 370 if (!IsRelativePath(argvalue) && 371 stat(argvalue, &sa) != -1 && 372 stat(curdir, &sb) != -1 && 373 sa.st_ino == sb.st_ino && 374 sa.st_dev == sb.st_dev) 375 strncpy(curdir, argvalue, MAXPATHLEN); 376 ignorePWD = true; 377} 378 379static void 380MainParseArgJobsInternal(const char *argvalue) 381{ 382 char end; 383 if (sscanf(argvalue, "%d,%d%c", &jp_0, &jp_1, &end) != 2) { 384 (void)fprintf(stderr, 385 "%s: internal error -- J option malformed (%s)\n", 386 progname, argvalue); 387 usage(); 388 } 389 if ((fcntl(jp_0, F_GETFD, 0) < 0) || 390 (fcntl(jp_1, F_GETFD, 0) < 0)) { 391 jp_0 = -1; 392 jp_1 = -1; 393 opts.compatMake = true; 394 } else { 395 Global_Append(MAKEFLAGS, "-J"); 396 Global_Append(MAKEFLAGS, argvalue); 397 } 398} 399 400static void 401MainParseArgJobs(const char *arg) 402{ 403 const char *p; 404 char *end; 405 char v[12]; 406 407 forceJobs = true; 408 opts.maxJobs = (int)strtol(arg, &end, 0); 409 p = end; 410#ifdef _SC_NPROCESSORS_ONLN 411 if (*p != '\0') { 412 double d; 413 414 if (*p == 'C') 415 d = (opts.maxJobs > 0) ? opts.maxJobs : 1; 416 else if (*p == '.') { 417 d = strtod(arg, &end); 418 p = end; 419 } else 420 d = 0.0; 421 if (d > 0.0) { 422 p = ""; 423 opts.maxJobs = (int)sysconf(_SC_NPROCESSORS_ONLN); 424 opts.maxJobs = (int)(d * (double)opts.maxJobs); 425 } 426 } 427#endif 428 if (*p != '\0' || opts.maxJobs < 1) { 429 (void)fprintf(stderr, 430 "%s: argument '%s' to option '-j' " 431 "must be a positive number\n", 432 progname, arg); 433 exit(2); /* Not 1 so -q can distinguish error */ 434 } 435 snprintf(v, sizeof(v), "%d", opts.maxJobs); 436 Global_Append(MAKEFLAGS, "-j"); 437 Global_Append(MAKEFLAGS, v); 438 Global_Set(".MAKE.JOBS", v); 439 maxJobTokens = opts.maxJobs; 440} 441 442static void 443MainParseArgSysInc(const char *argvalue) 444{ 445 if (strncmp(argvalue, ".../", 4) == 0) { 446 char *found_path = Dir_FindHereOrAbove(curdir, argvalue + 4); 447 if (found_path == NULL) 448 return; 449 (void)SearchPath_Add(sysIncPath, found_path); 450 free(found_path); 451 } else { 452 (void)SearchPath_Add(sysIncPath, argvalue); 453 } 454 Global_Append(MAKEFLAGS, "-m"); 455 Global_Append(MAKEFLAGS, argvalue); 456 Dir_SetSYSPATH(); 457} 458 459static bool 460MainParseOption(char c, const char *argvalue) 461{ 462 switch (c) { 463 case '\0': 464 break; 465 case 'B': 466 opts.compatMake = true; 467 Global_Append(MAKEFLAGS, "-B"); 468 Global_Set(".MAKE.MODE", "compat"); 469 break; 470 case 'C': 471 MainParseArgChdir(argvalue); 472 break; 473 case 'D': 474 if (argvalue[0] == '\0') 475 return false; 476 Var_SetExpand(SCOPE_GLOBAL, argvalue, "1"); 477 Global_Append(MAKEFLAGS, "-D"); 478 Global_Append(MAKEFLAGS, argvalue); 479 break; 480 case 'I': 481 SearchPath_Add(parseIncPath, argvalue); 482 Global_Append(MAKEFLAGS, "-I"); 483 Global_Append(MAKEFLAGS, argvalue); 484 break; 485 case 'J': 486 MainParseArgJobsInternal(argvalue); 487 break; 488 case 'N': 489 opts.noExecute = true; 490 opts.noRecursiveExecute = true; 491 Global_Append(MAKEFLAGS, "-N"); 492 break; 493 case 'S': 494 opts.keepgoing = false; 495 Global_Append(MAKEFLAGS, "-S"); 496 break; 497 case 'T': 498 tracefile = bmake_strdup(argvalue); 499 Global_Append(MAKEFLAGS, "-T"); 500 Global_Append(MAKEFLAGS, argvalue); 501 break; 502 case 'V': 503 case 'v': 504 opts.printVars = c == 'v' ? PVM_EXPANDED : PVM_UNEXPANDED; 505 Lst_Append(&opts.variables, bmake_strdup(argvalue)); 506 /* XXX: Why always -V? */ 507 Global_Append(MAKEFLAGS, "-V"); 508 Global_Append(MAKEFLAGS, argvalue); 509 break; 510 case 'W': 511 opts.parseWarnFatal = true; 512 /* XXX: why no Global_Append? */ 513 break; 514 case 'X': 515 opts.varNoExportEnv = true; 516 Global_Append(MAKEFLAGS, "-X"); 517 break; 518 case 'd': 519 /* If '-d-opts' don't pass to children */ 520 if (argvalue[0] == '-') 521 argvalue++; 522 else { 523 Global_Append(MAKEFLAGS, "-d"); 524 Global_Append(MAKEFLAGS, argvalue); 525 } 526 MainParseArgDebug(argvalue); 527 break; 528 case 'e': 529 opts.checkEnvFirst = true; 530 Global_Append(MAKEFLAGS, "-e"); 531 break; 532 case 'f': 533 Lst_Append(&opts.makefiles, bmake_strdup(argvalue)); 534 break; 535 case 'i': 536 opts.ignoreErrors = true; 537 Global_Append(MAKEFLAGS, "-i"); 538 break; 539 case 'j': 540 MainParseArgJobs(argvalue); 541 break; 542 case 'k': 543 opts.keepgoing = true; 544 Global_Append(MAKEFLAGS, "-k"); 545 break; 546 case 'm': 547 MainParseArgSysInc(argvalue); 548 /* XXX: why no Var_Append? */ 549 break; 550 case 'n': 551 opts.noExecute = true; 552 Global_Append(MAKEFLAGS, "-n"); 553 break; 554 case 'q': 555 opts.query = true; 556 /* Kind of nonsensical, wot? */ 557 Global_Append(MAKEFLAGS, "-q"); 558 break; 559 case 'r': 560 opts.noBuiltins = true; 561 Global_Append(MAKEFLAGS, "-r"); 562 break; 563 case 's': 564 opts.silent = true; 565 Global_Append(MAKEFLAGS, "-s"); 566 break; 567 case 't': 568 opts.touch = true; 569 Global_Append(MAKEFLAGS, "-t"); 570 break; 571 case 'w': 572 opts.enterFlag = true; 573 Global_Append(MAKEFLAGS, "-w"); 574 break; 575 default: 576 usage(); 577 } 578 return true; 579} 580 581/* 582 * Parse the given arguments. Called from main() and from 583 * Main_ParseArgLine() when the .MAKEFLAGS target is used. 584 * 585 * The arguments must be treated as read-only and will be freed after the 586 * call. 587 * 588 * XXX: Deal with command line overriding .MAKEFLAGS in makefile 589 */ 590static void 591MainParseArgs(int argc, char **argv) 592{ 593 char c; 594 int arginc; 595 char *argvalue; 596 char *optscan; 597 bool inOption, dashDash = false; 598 599 const char *optspecs = "BC:D:I:J:NST:V:WXd:ef:ij:km:nqrstv:w"; 600/* Can't actually use getopt(3) because rescanning is not portable */ 601 602rearg: 603 inOption = false; 604 optscan = NULL; 605 while (argc > 1) { 606 const char *optspec; 607 if (!inOption) 608 optscan = argv[1]; 609 c = *optscan++; 610 arginc = 0; 611 if (inOption) { 612 if (c == '\0') { 613 argv++; 614 argc--; 615 inOption = false; 616 continue; 617 } 618 } else { 619 if (c != '-' || dashDash) 620 break; 621 inOption = true; 622 c = *optscan++; 623 } 624 /* '-' found at some earlier point */ 625 optspec = strchr(optspecs, c); 626 if (c != '\0' && optspec != NULL && optspec[1] == ':') { 627 /* 628 * -<something> found, and <something> should have an 629 * argument 630 */ 631 inOption = false; 632 arginc = 1; 633 argvalue = optscan; 634 if (*argvalue == '\0') { 635 if (argc < 3) 636 goto noarg; 637 argvalue = argv[2]; 638 arginc = 2; 639 } 640 } else { 641 argvalue = NULL; 642 } 643 switch (c) { 644 case '\0': 645 arginc = 1; 646 inOption = false; 647 break; 648 case '-': 649 dashDash = true; 650 break; 651 default: 652 if (!MainParseOption(c, argvalue)) 653 goto noarg; 654 } 655 argv += arginc; 656 argc -= arginc; 657 } 658 659 /* 660 * See if the rest of the arguments are variable assignments and 661 * perform them if so. Else take them to be targets and stuff them 662 * on the end of the "create" list. 663 */ 664 for (; argc > 1; argv++, argc--) { 665 if (!Parse_VarAssign(argv[1], false, SCOPE_CMDLINE)) { 666 if (argv[1][0] == '\0') 667 Punt("illegal (null) argument."); 668 if (argv[1][0] == '-' && !dashDash) 669 goto rearg; 670 Lst_Append(&opts.create, bmake_strdup(argv[1])); 671 } 672 } 673 674 return; 675noarg: 676 (void)fprintf(stderr, "%s: option requires an argument -- %c\n", 677 progname, c); 678 usage(); 679} 680 681/* 682 * Break a line of arguments into words and parse them. 683 * 684 * Used when a .MFLAGS or .MAKEFLAGS target is encountered during parsing and 685 * by main() when reading the MAKEFLAGS environment variable. 686 */ 687void 688Main_ParseArgLine(const char *line) 689{ 690 Words words; 691 char *buf; 692 const char *p; 693 694 if (line == NULL) 695 return; 696 for (p = line; *p == ' '; p++) 697 continue; 698 if (p[0] == '\0') 699 return; 700 701 { 702 FStr argv0 = Var_Value(SCOPE_GLOBAL, ".MAKE"); 703 buf = str_concat3(argv0.str, " ", p); 704 FStr_Done(&argv0); 705 } 706 707 words = Str_Words(buf, true); 708 if (words.words == NULL) { 709 Error("Unterminated quoted string [%s]", buf); 710 free(buf); 711 return; 712 } 713 free(buf); 714 MainParseArgs((int)words.len, words.words); 715 716 Words_Free(words); 717} 718 719bool 720Main_SetObjdir(bool writable, const char *fmt, ...) 721{ 722 struct stat sb; 723 char *path; 724 char buf[MAXPATHLEN + 1]; 725 char buf2[MAXPATHLEN + 1]; 726 va_list ap; 727 728 va_start(ap, fmt); 729 vsnprintf(path = buf, MAXPATHLEN, fmt, ap); 730 va_end(ap); 731 732 if (path[0] != '/') { 733 if (snprintf(buf2, MAXPATHLEN, "%s/%s", curdir, path) <= MAXPATHLEN) 734 path = buf2; 735 else 736 return false; 737 } 738 739 /* look for the directory and try to chdir there */ 740 if (stat(path, &sb) != 0 || !S_ISDIR(sb.st_mode)) 741 return false; 742 743 if ((writable && access(path, W_OK) != 0) || chdir(path) != 0) { 744 (void)fprintf(stderr, "%s: warning: %s: %s.\n", 745 progname, path, strerror(errno)); 746 return false; 747 } 748 749 snprintf(objdir, sizeof objdir, "%s", path); 750 Global_Set(".OBJDIR", objdir); 751 setenv("PWD", objdir, 1); 752 Dir_InitDot(); 753 purge_relative_cached_realpaths(); 754 if (opts.enterFlag && strcmp(objdir, curdir) != 0) 755 enterFlagObj = true; 756 return true; 757} 758 759static bool 760SetVarObjdir(bool writable, const char *var, const char *suffix) 761{ 762 FStr path = Var_Value(SCOPE_CMDLINE, var); 763 764 if (path.str == NULL || path.str[0] == '\0') { 765 FStr_Done(&path); 766 return false; 767 } 768 769 Var_Expand(&path, SCOPE_GLOBAL, VARE_WANTRES); 770 771 (void)Main_SetObjdir(writable, "%s%s", path.str, suffix); 772 773 FStr_Done(&path); 774 return true; 775} 776 777/* 778 * Splits str into words (in-place, modifying it), adding them to the list. 779 * The string must be kept alive as long as the list. 780 */ 781void 782AppendWords(StringList *lp, char *str) 783{ 784 char *p; 785 const char *sep = " \t"; 786 787 for (p = strtok(str, sep); p != NULL; p = strtok(NULL, sep)) 788 Lst_Append(lp, p); 789} 790 791#ifdef SIGINFO 792/*ARGSUSED*/ 793static void 794siginfo(int signo MAKE_ATTR_UNUSED) 795{ 796 char dir[MAXPATHLEN]; 797 char str[2 * MAXPATHLEN]; 798 int len; 799 if (getcwd(dir, sizeof dir) == NULL) 800 return; 801 len = snprintf(str, sizeof str, "%s: Working in: %s\n", progname, dir); 802 if (len > 0) 803 (void)write(STDERR_FILENO, str, (size_t)len); 804} 805#endif 806 807/* Allow makefiles some control over the mode we run in. */ 808static void 809MakeMode(void) 810{ 811 char *mode = Var_Subst("${.MAKE.MODE:tl}", 812 SCOPE_GLOBAL, VARE_WANTRES); 813 /* TODO: handle errors */ 814 815 if (mode[0] != '\0') { 816 if (strstr(mode, "compat") != NULL) { 817 opts.compatMake = true; 818 forceJobs = false; 819 } 820#if USE_META 821 if (strstr(mode, "meta") != NULL) 822 meta_mode_init(mode); 823#endif 824 if (strstr(mode, "randomize-targets") != NULL) 825 opts.randomizeTargets = true; 826 } 827 828 free(mode); 829} 830 831static void 832PrintVar(const char *varname, bool expandVars) 833{ 834 if (strchr(varname, '$') != NULL) { 835 char *evalue = Var_Subst(varname, SCOPE_GLOBAL, VARE_WANTRES); 836 /* TODO: handle errors */ 837 printf("%s\n", evalue); 838 free(evalue); 839 840 } else if (expandVars) { 841 char *expr = str_concat3("${", varname, "}"); 842 char *evalue = Var_Subst(expr, SCOPE_GLOBAL, VARE_WANTRES); 843 /* TODO: handle errors */ 844 free(expr); 845 printf("%s\n", evalue); 846 free(evalue); 847 848 } else { 849 FStr value = Var_Value(SCOPE_GLOBAL, varname); 850 printf("%s\n", value.str != NULL ? value.str : ""); 851 FStr_Done(&value); 852 } 853} 854 855/* 856 * Return a bool based on a variable. 857 * 858 * If the knob is not set, return the fallback. 859 * If set, anything that looks or smells like "No", "False", "Off", "0", etc. 860 * is false, otherwise true. 861 */ 862bool 863GetBooleanExpr(const char *expr, bool fallback) 864{ 865 char *value; 866 bool res; 867 868 value = Var_Subst(expr, SCOPE_GLOBAL, VARE_WANTRES); 869 /* TODO: handle errors */ 870 res = ParseBoolean(value, fallback); 871 free(value); 872 return res; 873} 874 875static void 876doPrintVars(void) 877{ 878 StringListNode *ln; 879 bool expandVars; 880 881 if (opts.printVars == PVM_EXPANDED) 882 expandVars = true; 883 else if (opts.debugVflag) 884 expandVars = false; 885 else 886 expandVars = GetBooleanExpr("${.MAKE.EXPAND_VARIABLES}", 887 false); 888 889 for (ln = opts.variables.first; ln != NULL; ln = ln->next) { 890 const char *varname = ln->datum; 891 PrintVar(varname, expandVars); 892 } 893} 894 895static bool 896runTargets(void) 897{ 898 GNodeList targs = LST_INIT; /* target nodes to create */ 899 bool outOfDate; /* false if all targets up to date */ 900 901 /* 902 * Have now read the entire graph and need to make a list of 903 * targets to create. If none was given on the command line, 904 * we consult the parsing module to find the main target(s) 905 * to create. 906 */ 907 if (Lst_IsEmpty(&opts.create)) 908 Parse_MainName(&targs); 909 else 910 Targ_FindList(&targs, &opts.create); 911 912 if (!opts.compatMake) { 913 /* 914 * Initialize job module before traversing the graph 915 * now that any .BEGIN and .END targets have been read. 916 * This is done only if the -q flag wasn't given 917 * (to prevent the .BEGIN from being executed should 918 * it exist). 919 */ 920 if (!opts.query) { 921 Job_Init(); 922 jobsRunning = true; 923 } 924 925 /* Traverse the graph, checking on all the targets */ 926 outOfDate = Make_Run(&targs); 927 } else { 928 Compat_MakeAll(&targs); 929 outOfDate = false; 930 } 931 Lst_Done(&targs); /* Don't free the targets themselves. */ 932 return outOfDate; 933} 934 935/* 936 * Set up the .TARGETS variable to contain the list of targets to be created. 937 * If none specified, make the variable empty for now, the parser will fill 938 * in the default or .MAIN target later. 939 */ 940static void 941InitVarTargets(void) 942{ 943 StringListNode *ln; 944 945 if (Lst_IsEmpty(&opts.create)) { 946 Global_Set(".TARGETS", ""); 947 return; 948 } 949 950 for (ln = opts.create.first; ln != NULL; ln = ln->next) { 951 const char *name = ln->datum; 952 Global_Append(".TARGETS", name); 953 } 954} 955 956static void 957InitRandom(void) 958{ 959 struct timeval tv; 960 961 gettimeofday(&tv, NULL); 962 srandom((unsigned int)(tv.tv_sec + tv.tv_usec)); 963} 964 965static const char * 966InitVarMachine(const struct utsname *utsname MAKE_ATTR_UNUSED) 967{ 968#ifdef FORCE_MACHINE 969 return FORCE_MACHINE; 970#else 971 const char *machine = getenv("MACHINE"); 972 973 if (machine != NULL) 974 return machine; 975 976#if defined(MAKE_NATIVE) 977 return utsname->machine; 978#elif defined(MAKE_MACHINE) 979 return MAKE_MACHINE; 980#else 981 return "unknown"; 982#endif 983#endif 984} 985 986static const char * 987InitVarMachineArch(void) 988{ 989#ifdef FORCE_MACHINE_ARCH 990 return FORCE_MACHINE_ARCH; 991#else 992 const char *env = getenv("MACHINE_ARCH"); 993 if (env != NULL) 994 return env; 995 996#if defined(MAKE_NATIVE) && defined(CTL_HW) 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#endif 1020} 1021 1022#ifndef NO_PWD_OVERRIDE 1023/* 1024 * Overriding getcwd() with $PWD totally breaks MAKEOBJDIRPREFIX 1025 * since the value of curdir can vary depending on how we got 1026 * here. That is, sitting at a shell prompt (shell that provides $PWD) 1027 * or via subdir.mk, in which case it's likely a shell which does 1028 * not provide it. 1029 * 1030 * So, to stop it breaking this case only, we ignore PWD if 1031 * MAKEOBJDIRPREFIX is set or MAKEOBJDIR contains an expression. 1032 */ 1033static void 1034HandlePWD(const struct stat *curdir_st) 1035{ 1036 char *pwd; 1037 FStr makeobjdir; 1038 struct stat pwd_st; 1039 1040 if (ignorePWD || (pwd = getenv("PWD")) == NULL) 1041 return; 1042 1043 if (Var_Exists(SCOPE_CMDLINE, "MAKEOBJDIRPREFIX")) 1044 return; 1045 1046 makeobjdir = Var_Value(SCOPE_CMDLINE, "MAKEOBJDIR"); 1047 if (makeobjdir.str != NULL && strchr(makeobjdir.str, '$') != NULL) 1048 goto ignore_pwd; 1049 1050 if (stat(pwd, &pwd_st) == 0 && 1051 curdir_st->st_ino == pwd_st.st_ino && 1052 curdir_st->st_dev == pwd_st.st_dev) 1053 (void)strncpy(curdir, pwd, MAXPATHLEN); 1054 1055ignore_pwd: 1056 FStr_Done(&makeobjdir); 1057} 1058#endif 1059 1060/* 1061 * Find the .OBJDIR. If MAKEOBJDIRPREFIX, or failing that, MAKEOBJDIR is set 1062 * in the environment, try only that value and fall back to .CURDIR if it 1063 * does not exist. 1064 * 1065 * Otherwise, try _PATH_OBJDIR.MACHINE-MACHINE_ARCH, _PATH_OBJDIR.MACHINE, 1066 * and finally _PATH_OBJDIRPREFIX`pwd`, in that order. If none of these 1067 * paths exist, just use .CURDIR. 1068 */ 1069static void 1070InitObjdir(const char *machine, const char *machine_arch) 1071{ 1072 bool writable; 1073 1074 Dir_InitCur(curdir); 1075 writable = GetBooleanExpr("${MAKE_OBJDIR_CHECK_WRITABLE}", true); 1076 (void)Main_SetObjdir(false, "%s", curdir); 1077 1078 if (!SetVarObjdir(writable, "MAKEOBJDIRPREFIX", curdir) && 1079 !SetVarObjdir(writable, "MAKEOBJDIR", "") && 1080 !Main_SetObjdir(writable, "%s.%s-%s", _PATH_OBJDIR, machine, machine_arch) && 1081 !Main_SetObjdir(writable, "%s.%s", _PATH_OBJDIR, machine) && 1082 !Main_SetObjdir(writable, "%s", _PATH_OBJDIR)) 1083 (void)Main_SetObjdir(writable, "%s%s", _PATH_OBJDIRPREFIX, curdir); 1084} 1085 1086/* get rid of resource limit on file descriptors */ 1087static void 1088UnlimitFiles(void) 1089{ 1090#if defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE) 1091 struct rlimit rl; 1092 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 && 1093 rl.rlim_cur != rl.rlim_max) { 1094#ifdef BMAKE_NOFILE_MAX 1095 if (BMAKE_NOFILE_MAX < rl.rlim_max) 1096 rl.rlim_cur = BMAKE_NOFILE_MAX; 1097 else 1098#endif 1099 rl.rlim_cur = rl.rlim_max; 1100 (void)setrlimit(RLIMIT_NOFILE, &rl); 1101 } 1102#endif 1103} 1104 1105static void 1106CmdOpts_Init(void) 1107{ 1108 opts.compatMake = false; 1109 memset(&opts.debug, 0, sizeof(opts.debug)); 1110 /* opts.debug_file has already been initialized earlier */ 1111 opts.strict = false; 1112 opts.debugVflag = false; 1113 opts.checkEnvFirst = false; 1114 Lst_Init(&opts.makefiles); 1115 opts.ignoreErrors = false; /* Pay attention to non-zero returns */ 1116 opts.maxJobs = 1; 1117 opts.keepgoing = false; /* Stop on error */ 1118 opts.noRecursiveExecute = false; /* Execute all .MAKE targets */ 1119 opts.noExecute = false; /* Execute all commands */ 1120 opts.query = false; 1121 opts.noBuiltins = false; /* Read the built-in rules */ 1122 opts.silent = false; /* Print commands as executed */ 1123 opts.touch = false; 1124 opts.printVars = PVM_NONE; 1125 Lst_Init(&opts.variables); 1126 opts.parseWarnFatal = false; 1127 opts.enterFlag = false; 1128 opts.varNoExportEnv = false; 1129 Lst_Init(&opts.create); 1130} 1131 1132/* 1133 * Initialize MAKE and .MAKE to the path of the executable, so that it can be 1134 * found by execvp(3) and the shells, even after a chdir. 1135 * 1136 * If it's a relative path and contains a '/', resolve it to an absolute path. 1137 * Otherwise keep it as is, assuming it will be found in the PATH. 1138 */ 1139static void 1140InitVarMake(const char *argv0) 1141{ 1142 const char *make = argv0; 1143 1144 if (argv0[0] != '/' && strchr(argv0, '/') != NULL) { 1145 char pathbuf[MAXPATHLEN]; 1146 const char *abspath = cached_realpath(argv0, pathbuf); 1147 struct stat st; 1148 if (abspath != NULL && abspath[0] == '/' && 1149 stat(make, &st) == 0) 1150 make = abspath; 1151 } 1152 1153 Global_Set("MAKE", make); 1154 Global_Set(".MAKE", make); 1155} 1156 1157/* 1158 * Add the directories from the colon-separated syspath to defSysIncPath. 1159 * After returning, the contents of syspath is unspecified. 1160 */ 1161static void 1162InitDefSysIncPath(char *syspath) 1163{ 1164 static char defsyspath[] = _PATH_DEFSYSPATH; 1165 char *start, *p; 1166 1167 /* 1168 * If no user-supplied system path was given (through the -m option) 1169 * add the directories from the DEFSYSPATH (more than one may be given 1170 * as dir1:...:dirn) to the system include path. 1171 */ 1172 if (syspath == NULL || syspath[0] == '\0') 1173 syspath = defsyspath; 1174 else 1175 syspath = bmake_strdup(syspath); 1176 1177 for (start = syspath; *start != '\0'; start = p) { 1178 for (p = start; *p != '\0' && *p != ':'; p++) 1179 continue; 1180 if (*p == ':') 1181 *p++ = '\0'; 1182 1183 /* look for magic parent directory search string */ 1184 if (strncmp(start, ".../", 4) == 0) { 1185 char *dir = Dir_FindHereOrAbove(curdir, start + 4); 1186 if (dir != NULL) { 1187 (void)SearchPath_Add(defSysIncPath, dir); 1188 free(dir); 1189 } 1190 } else { 1191 (void)SearchPath_Add(defSysIncPath, start); 1192 } 1193 } 1194 1195 if (syspath != defsyspath) 1196 free(syspath); 1197} 1198 1199static void 1200ReadBuiltinRules(void) 1201{ 1202 StringListNode *ln; 1203 StringList sysMkFiles = LST_INIT; 1204 1205 SearchPath_Expand( 1206 Lst_IsEmpty(&sysIncPath->dirs) ? defSysIncPath : sysIncPath, 1207 _PATH_DEFSYSMK, 1208 &sysMkFiles); 1209 if (Lst_IsEmpty(&sysMkFiles)) 1210 Fatal("%s: no system rules (%s).", progname, _PATH_DEFSYSMK); 1211 1212 for (ln = sysMkFiles.first; ln != NULL; ln = ln->next) 1213 if (ReadMakefile(ln->datum)) 1214 break; 1215 1216 if (ln == NULL) 1217 Fatal("%s: cannot open %s.", 1218 progname, (const char *)sysMkFiles.first->datum); 1219 1220 Lst_DoneFree(&sysMkFiles); 1221} 1222 1223static void 1224InitMaxJobs(void) 1225{ 1226 char *value; 1227 int n; 1228 1229 if (forceJobs || opts.compatMake || 1230 !Var_Exists(SCOPE_GLOBAL, ".MAKE.JOBS")) 1231 return; 1232 1233 value = Var_Subst("${.MAKE.JOBS}", SCOPE_GLOBAL, VARE_WANTRES); 1234 /* TODO: handle errors */ 1235 n = (int)strtol(value, NULL, 0); 1236 if (n < 1) { 1237 (void)fprintf(stderr, 1238 "%s: illegal value for .MAKE.JOBS " 1239 "-- must be positive integer!\n", 1240 progname); 1241 exit(2); /* Not 1 so -q can distinguish error */ 1242 } 1243 1244 if (n != opts.maxJobs) { 1245 Global_Append(MAKEFLAGS, "-j"); 1246 Global_Append(MAKEFLAGS, value); 1247 } 1248 1249 opts.maxJobs = n; 1250 maxJobTokens = opts.maxJobs; 1251 forceJobs = true; 1252 free(value); 1253} 1254 1255/* 1256 * For compatibility, look at the directories in the VPATH variable 1257 * and add them to the search path, if the variable is defined. The 1258 * variable's value is in the same format as the PATH environment 1259 * variable, i.e. <directory>:<directory>:<directory>... 1260 */ 1261static void 1262InitVpath(void) 1263{ 1264 char *vpath, savec, *path; 1265 if (!Var_Exists(SCOPE_CMDLINE, "VPATH")) 1266 return; 1267 1268 vpath = Var_Subst("${VPATH}", SCOPE_CMDLINE, VARE_WANTRES); 1269 /* TODO: handle errors */ 1270 path = vpath; 1271 do { 1272 char *p; 1273 /* skip to end of directory */ 1274 for (p = path; *p != ':' && *p != '\0'; p++) 1275 continue; 1276 /* Save terminator character so know when to stop */ 1277 savec = *p; 1278 *p = '\0'; 1279 /* Add directory to search path */ 1280 (void)SearchPath_Add(&dirSearchPath, path); 1281 *p = savec; 1282 path = p + 1; 1283 } while (savec == ':'); 1284 free(vpath); 1285} 1286 1287static void 1288ReadAllMakefiles(const StringList *makefiles) 1289{ 1290 StringListNode *ln; 1291 1292 for (ln = makefiles->first; ln != NULL; ln = ln->next) { 1293 const char *fname = ln->datum; 1294 if (!ReadMakefile(fname)) 1295 Fatal("%s: cannot open %s.", progname, fname); 1296 } 1297} 1298 1299static void 1300ReadFirstDefaultMakefile(void) 1301{ 1302 StringList makefiles = LST_INIT; 1303 StringListNode *ln; 1304 char *prefs = Var_Subst("${.MAKE.MAKEFILE_PREFERENCE}", 1305 SCOPE_CMDLINE, VARE_WANTRES); 1306 /* TODO: handle errors */ 1307 1308 AppendWords(&makefiles, prefs); 1309 1310 for (ln = makefiles.first; ln != NULL; ln = ln->next) 1311 if (ReadMakefile(ln->datum)) 1312 break; 1313 1314 Lst_Done(&makefiles); 1315 free(prefs); 1316} 1317 1318/* 1319 * Initialize variables such as MAKE, MACHINE, .MAKEFLAGS. 1320 * Initialize a few modules. 1321 * Parse the arguments from MAKEFLAGS and the command line. 1322 */ 1323static void 1324main_Init(int argc, char **argv) 1325{ 1326 struct stat sa; 1327 const char *machine; 1328 const char *machine_arch; 1329 char *syspath = getenv("MAKESYSPATH"); 1330 struct utsname utsname; 1331 1332 /* default to writing debug to stderr */ 1333 opts.debug_file = stderr; 1334 1335 Str_Intern_Init(); 1336 HashTable_Init(&cached_realpaths); 1337 1338#ifdef SIGINFO 1339 (void)bmake_signal(SIGINFO, siginfo); 1340#endif 1341 1342 InitRandom(); 1343 1344 progname = str_basename(argv[0]); 1345 1346 UnlimitFiles(); 1347 1348 if (uname(&utsname) == -1) { 1349 (void)fprintf(stderr, "%s: uname failed (%s).\n", progname, 1350 strerror(errno)); 1351 exit(2); 1352 } 1353 1354 machine = InitVarMachine(&utsname); 1355 machine_arch = InitVarMachineArch(); 1356 1357 myPid = getpid(); /* remember this for vFork() */ 1358 1359 /* Just in case MAKEOBJDIR wants us to do something tricky. */ 1360 Targ_Init(); 1361 Var_Init(); 1362#ifdef FORCE_MAKE_OS 1363 Global_Set_ReadOnly(".MAKE.OS", FORCE_MAKE_OS); 1364#else 1365 Global_Set_ReadOnly(".MAKE.OS", utsname.sysname); 1366#endif 1367 Global_Set("MACHINE", machine); 1368 Global_Set("MACHINE_ARCH", machine_arch); 1369#ifdef MAKE_VERSION 1370 Global_Set("MAKE_VERSION", MAKE_VERSION); 1371#endif 1372 Global_Set_ReadOnly(".newline", "\n"); 1373#ifndef MAKEFILE_PREFERENCE_LIST 1374 /* This is the traditional preference for makefiles. */ 1375# define MAKEFILE_PREFERENCE_LIST "makefile Makefile" 1376#endif 1377 Global_Set(".MAKE.MAKEFILE_PREFERENCE", MAKEFILE_PREFERENCE_LIST); 1378 Global_Set(".MAKE.DEPENDFILE", ".depend"); 1379 /* Tell makefiles like jobs.mk whether we support -jC */ 1380#ifdef _SC_NPROCESSORS_ONLN 1381 Global_Set_ReadOnly(".MAKE.JOBS.C", "yes"); 1382#else 1383 Global_Set_ReadOnly(".MAKE.JOBS.C", "no"); 1384#endif 1385 1386 CmdOpts_Init(); 1387 allPrecious = false; /* Remove targets when interrupted */ 1388 deleteOnError = false; /* Historical default behavior */ 1389 jobsRunning = false; 1390 1391 maxJobTokens = opts.maxJobs; 1392 ignorePWD = false; 1393 1394 /* 1395 * Initialize the parsing, directory and variable modules to prepare 1396 * for the reading of inclusion paths and variable settings on the 1397 * command line 1398 */ 1399 1400 /* 1401 * Initialize various variables. 1402 * MAKE also gets this name, for compatibility 1403 * .MAKEFLAGS gets set to the empty string just in case. 1404 * MFLAGS also gets initialized empty, for compatibility. 1405 */ 1406 Parse_Init(); 1407 InitVarMake(argv[0]); 1408 Global_Set(MAKEFLAGS, ""); 1409 Global_Set(".MAKEOVERRIDES", ""); 1410 Global_Set("MFLAGS", ""); 1411 Global_Set(".ALLTARGETS", ""); 1412 Global_Set_ReadOnly(".MAKE.LEVEL.ENV", MAKE_LEVEL_ENV); 1413 1414 /* Set some other useful variables. */ 1415 { 1416 char buf[64], *ep = getenv(MAKE_LEVEL_ENV); 1417 1418 makelevel = ep != NULL && ep[0] != '\0' ? atoi(ep) : 0; 1419 if (makelevel < 0) 1420 makelevel = 0; 1421 snprintf(buf, sizeof buf, "%d", makelevel); 1422 Global_Set(".MAKE.LEVEL", buf); 1423 snprintf(buf, sizeof buf, "%u", myPid); 1424 Global_Set_ReadOnly(".MAKE.PID", buf); 1425 snprintf(buf, sizeof buf, "%u", getppid()); 1426 Global_Set_ReadOnly(".MAKE.PPID", buf); 1427 snprintf(buf, sizeof buf, "%u", getuid()); 1428 Global_Set_ReadOnly(".MAKE.UID", buf); 1429 snprintf(buf, sizeof buf, "%u", getgid()); 1430 Global_Set_ReadOnly(".MAKE.GID", buf); 1431 } 1432 if (makelevel > 0) { 1433 char pn[1024]; 1434 snprintf(pn, sizeof pn, "%s[%d]", progname, makelevel); 1435 progname = bmake_strdup(pn); 1436 } 1437 1438#ifdef USE_META 1439 meta_init(); 1440#endif 1441 Dir_Init(); 1442 1443 { 1444 char *makeflags = explode(getenv("MAKEFLAGS")); 1445 Main_ParseArgLine(makeflags); 1446 free(makeflags); 1447 } 1448 1449 if (getcwd(curdir, MAXPATHLEN) == NULL) { 1450 (void)fprintf(stderr, "%s: getcwd: %s.\n", 1451 progname, strerror(errno)); 1452 exit(2); 1453 } 1454 1455 MainParseArgs(argc, argv); 1456 1457 if (opts.enterFlag) 1458 printf("%s: Entering directory `%s'\n", progname, curdir); 1459 1460 if (stat(curdir, &sa) == -1) { 1461 (void)fprintf(stderr, "%s: %s: %s.\n", 1462 progname, curdir, strerror(errno)); 1463 exit(2); 1464 } 1465 1466#ifndef NO_PWD_OVERRIDE 1467 HandlePWD(&sa); 1468#endif 1469 Global_Set(".CURDIR", curdir); 1470 1471 InitObjdir(machine, machine_arch); 1472 1473 Arch_Init(); 1474 Suff_Init(); 1475 Trace_Init(tracefile); 1476 1477 defaultNode = NULL; 1478 (void)time(&now); 1479 1480 Trace_Log(MAKESTART, NULL); 1481 1482 InitVarTargets(); 1483 1484 InitDefSysIncPath(syspath); 1485} 1486 1487/* 1488 * Read the system makefile followed by either makefile, Makefile or the 1489 * files given by the -f option. Exit on parse errors. 1490 */ 1491static void 1492main_ReadFiles(void) 1493{ 1494 1495 if (Lst_IsEmpty(&sysIncPath->dirs)) 1496 SearchPath_AddAll(sysIncPath, defSysIncPath); 1497 1498 Dir_SetSYSPATH(); 1499 if (!opts.noBuiltins) 1500 ReadBuiltinRules(); 1501 1502 posix_state = PS_MAYBE_NEXT_LINE; 1503 if (!Lst_IsEmpty(&opts.makefiles)) 1504 ReadAllMakefiles(&opts.makefiles); 1505 else 1506 ReadFirstDefaultMakefile(); 1507} 1508 1509/* Compute the dependency graph. */ 1510static void 1511main_PrepareMaking(void) 1512{ 1513 /* In particular suppress .depend for '-r -V .OBJDIR -f /dev/null' */ 1514 if (!opts.noBuiltins || opts.printVars == PVM_NONE) { 1515 makeDependfile = Var_Subst("${.MAKE.DEPENDFILE}", 1516 SCOPE_CMDLINE, VARE_WANTRES); 1517 if (makeDependfile[0] != '\0') { 1518 /* TODO: handle errors */ 1519 doing_depend = true; 1520 (void)ReadMakefile(makeDependfile); 1521 doing_depend = false; 1522 } 1523 } 1524 1525 if (enterFlagObj) 1526 printf("%s: Entering directory `%s'\n", progname, objdir); 1527 1528 MakeMode(); 1529 1530 { 1531 FStr makeflags = Var_Value(SCOPE_GLOBAL, MAKEFLAGS); 1532 Global_Append("MFLAGS", makeflags.str); 1533 FStr_Done(&makeflags); 1534 } 1535 1536 InitMaxJobs(); 1537 1538 if (!opts.compatMake && !forceJobs) 1539 opts.compatMake = true; 1540 1541 if (!opts.compatMake) 1542 Job_ServerStart(maxJobTokens, jp_0, jp_1); 1543 DEBUG5(JOB, "job_pipe %d %d, maxjobs %d, tokens %d, compat %d\n", 1544 jp_0, jp_1, opts.maxJobs, maxJobTokens, opts.compatMake ? 1 : 0); 1545 1546 if (opts.printVars == PVM_NONE) 1547 Main_ExportMAKEFLAGS(true); /* initial export */ 1548 1549 InitVpath(); 1550 1551 /* 1552 * Now that all search paths have been read for suffixes et al, it's 1553 * time to add the default search path to their lists... 1554 */ 1555 Suff_ExtendPaths(); 1556 1557 /* 1558 * Propagate attributes through :: dependency lists. 1559 */ 1560 Targ_Propagate(); 1561 1562 /* print the initial graph, if the user requested it */ 1563 if (DEBUG(GRAPH1)) 1564 Targ_PrintGraph(1); 1565} 1566 1567/* 1568 * Make the targets. 1569 * If the -v or -V options are given, print variables instead. 1570 * Return whether any of the targets is out-of-date. 1571 */ 1572static bool 1573main_Run(void) 1574{ 1575 if (opts.printVars != PVM_NONE) { 1576 /* print the values of any variables requested by the user */ 1577 doPrintVars(); 1578 return false; 1579 } else { 1580 return runTargets(); 1581 } 1582} 1583 1584/* Clean up after making the targets. */ 1585static void 1586main_CleanUp(void) 1587{ 1588#ifdef CLEANUP 1589 Lst_DoneFree(&opts.variables); 1590 Lst_DoneFree(&opts.makefiles); 1591 Lst_DoneFree(&opts.create); 1592#endif 1593 1594 if (DEBUG(GRAPH2)) 1595 Targ_PrintGraph(2); 1596 1597 Trace_Log(MAKEEND, NULL); 1598 1599 if (enterFlagObj) 1600 printf("%s: Leaving directory `%s'\n", progname, objdir); 1601 if (opts.enterFlag) 1602 printf("%s: Leaving directory `%s'\n", progname, curdir); 1603 1604#ifdef USE_META 1605 meta_finish(); 1606#endif 1607 Suff_End(); 1608 Targ_End(); 1609 Arch_End(); 1610 Var_End(); 1611 Parse_End(); 1612 Dir_End(); 1613 Job_End(); 1614 Trace_End(); 1615 Str_Intern_End(); 1616} 1617 1618/* Determine the exit code. */ 1619static int 1620main_Exit(bool outOfDate) 1621{ 1622 if (opts.strict && (main_errors > 0 || Parse_NumErrors() > 0)) 1623 return 2; /* Not 1 so -q can distinguish error */ 1624 return outOfDate ? 1 : 0; 1625} 1626 1627int 1628main(int argc, char **argv) 1629{ 1630 bool outOfDate; 1631 1632 main_Init(argc, argv); 1633 main_ReadFiles(); 1634 main_PrepareMaking(); 1635 outOfDate = main_Run(); 1636 main_CleanUp(); 1637 return main_Exit(outOfDate); 1638} 1639 1640/* 1641 * Open and parse the given makefile, with all its side effects. 1642 * Return false if the file could not be opened. 1643 */ 1644static bool 1645ReadMakefile(const char *fname) 1646{ 1647 int fd; 1648 char *name, *path = NULL; 1649 1650 if (strcmp(fname, "-") == 0) { 1651 Parse_File("(stdin)", -1); 1652 Var_Set(SCOPE_INTERNAL, "MAKEFILE", ""); 1653 } else { 1654 /* if we've chdir'd, rebuild the path name */ 1655 if (strcmp(curdir, objdir) != 0 && *fname != '/') { 1656 path = str_concat3(curdir, "/", fname); 1657 fd = open(path, O_RDONLY); 1658 if (fd != -1) { 1659 fname = path; 1660 goto found; 1661 } 1662 free(path); 1663 1664 /* If curdir failed, try objdir (ala .depend) */ 1665 path = str_concat3(objdir, "/", fname); 1666 fd = open(path, O_RDONLY); 1667 if (fd != -1) { 1668 fname = path; 1669 goto found; 1670 } 1671 } else { 1672 fd = open(fname, O_RDONLY); 1673 if (fd != -1) 1674 goto found; 1675 } 1676 /* look in -I and system include directories. */ 1677 name = Dir_FindFile(fname, parseIncPath); 1678 if (name == NULL) { 1679 SearchPath *sysInc = Lst_IsEmpty(&sysIncPath->dirs) 1680 ? defSysIncPath : sysIncPath; 1681 name = Dir_FindFile(fname, sysInc); 1682 } 1683 if (name == NULL || (fd = open(name, O_RDONLY)) == -1) { 1684 free(name); 1685 free(path); 1686 return false; 1687 } 1688 fname = name; 1689 /* 1690 * set the MAKEFILE variable desired by System V fans -- the 1691 * placement of the setting here means it gets set to the last 1692 * makefile specified, as it is set by SysV make. 1693 */ 1694found: 1695 if (!doing_depend) 1696 Var_Set(SCOPE_INTERNAL, "MAKEFILE", fname); 1697 Parse_File(fname, fd); 1698 } 1699 free(path); 1700 return true; 1701} 1702 1703/* 1704 * Execute the command in cmd, and return its output (only stdout, not 1705 * stderr, possibly empty). In the output, replace newlines with spaces. 1706 */ 1707char * 1708Cmd_Exec(const char *cmd, char **error) 1709{ 1710 const char *args[4]; /* Arguments for invoking the shell */ 1711 int pipefds[2]; 1712 int cpid; /* Child PID */ 1713 int pid; /* PID from wait() */ 1714 int status; /* command exit status */ 1715 Buffer buf; /* buffer to store the result */ 1716 ssize_t bytes_read; 1717 char *output; 1718 char *p; 1719 int saved_errno; 1720 char cmd_file[MAXPATHLEN]; 1721 size_t cmd_len; 1722 int cmd_fd = -1; 1723 1724 if (shellPath == NULL) 1725 Shell_Init(); 1726 1727 cmd_len = strlen(cmd); 1728 if (cmd_len > 1000) { 1729 cmd_fd = mkTempFile(NULL, cmd_file, sizeof(cmd_file)); 1730 if (cmd_fd >= 0) { 1731 ssize_t n; 1732 1733 n = write(cmd_fd, cmd, cmd_len); 1734 close(cmd_fd); 1735 if (n < (ssize_t)cmd_len) { 1736 unlink(cmd_file); 1737 cmd_fd = -1; 1738 } 1739 } 1740 } 1741 1742 args[0] = shellName; 1743 if (cmd_fd >= 0) { 1744 args[1] = cmd_file; 1745 args[2] = NULL; 1746 } else { 1747 cmd_file[0] = '\0'; 1748 args[1] = "-c"; 1749 args[2] = cmd; 1750 args[3] = NULL; 1751 } 1752 DEBUG1(VAR, "Capturing the output of command \"%s\"\n", cmd); 1753 1754 if (pipe(pipefds) == -1) { 1755 *error = str_concat3( 1756 "Couldn't create pipe for \"", cmd, "\""); 1757 return bmake_strdup(""); 1758 } 1759 1760 Var_ReexportVars(SCOPE_GLOBAL); 1761 1762 switch (cpid = vfork()) { 1763 case 0: 1764 (void)close(pipefds[0]); 1765 (void)dup2(pipefds[1], STDOUT_FILENO); 1766 (void)close(pipefds[1]); 1767 1768 (void)execv(shellPath, UNCONST(args)); 1769 _exit(1); 1770 /* NOTREACHED */ 1771 1772 case -1: 1773 *error = str_concat3("Couldn't exec \"", cmd, "\""); 1774 return bmake_strdup(""); 1775 } 1776 1777 (void)close(pipefds[1]); /* No need for the writing half */ 1778 1779 saved_errno = 0; 1780 Buf_Init(&buf); 1781 1782 do { 1783 char result[BUFSIZ]; 1784 bytes_read = read(pipefds[0], result, sizeof result); 1785 if (bytes_read > 0) 1786 Buf_AddBytes(&buf, result, (size_t)bytes_read); 1787 } while (bytes_read > 0 || (bytes_read == -1 && errno == EINTR)); 1788 if (bytes_read == -1) 1789 saved_errno = errno; 1790 1791 (void)close(pipefds[0]); /* Close the input side of the pipe. */ 1792 1793 while ((pid = waitpid(cpid, &status, 0)) != cpid && pid >= 0) 1794 JobReapChild(pid, status, false); 1795 1796 if (Buf_EndsWith(&buf, '\n')) 1797 buf.data[buf.len - 1] = '\0'; 1798 1799 output = Buf_DoneData(&buf); 1800 for (p = output; *p != '\0'; p++) 1801 if (*p == '\n') 1802 *p = ' '; 1803 1804 if (WIFSIGNALED(status)) 1805 *error = str_concat3("\"", cmd, "\" exited on a signal"); 1806 else if (WEXITSTATUS(status) != 0) 1807 *error = str_concat3( 1808 "\"", cmd, "\" returned non-zero status"); 1809 else if (saved_errno != 0) 1810 *error = str_concat3( 1811 "Couldn't read shell's output for \"", cmd, "\""); 1812 else 1813 *error = NULL; 1814 if (cmd_file[0] != '\0') 1815 unlink(cmd_file); 1816 return output; 1817} 1818 1819/* 1820 * Print a printf-style error message. 1821 * 1822 * In default mode, this error message has no consequences, for compatibility 1823 * reasons, in particular it does not affect the exit status. Only in lint 1824 * mode (-dL) it does. 1825 */ 1826void 1827Error(const char *fmt, ...) 1828{ 1829 va_list ap; 1830 FILE *f; 1831 1832 f = opts.debug_file; 1833 if (f == stdout) 1834 f = stderr; 1835 (void)fflush(stdout); 1836 1837 for (;;) { 1838 fprintf(f, "%s: ", progname); 1839 va_start(ap, fmt); 1840 (void)vfprintf(f, fmt, ap); 1841 va_end(ap); 1842 (void)fprintf(f, "\n"); 1843 (void)fflush(f); 1844 if (f == stderr) 1845 break; 1846 f = stderr; 1847 } 1848 main_errors++; 1849} 1850 1851/* 1852 * Wait for any running jobs to finish, then produce an error message, 1853 * finally exit immediately. 1854 * 1855 * Exiting immediately differs from Parse_Error, which exits only after the 1856 * current top-level makefile has been parsed completely. 1857 */ 1858void 1859Fatal(const char *fmt, ...) 1860{ 1861 va_list ap; 1862 1863 if (jobsRunning) 1864 Job_Wait(); 1865 1866 (void)fflush(stdout); 1867 fprintf(stderr, "%s: ", progname); 1868 va_start(ap, fmt); 1869 (void)vfprintf(stderr, fmt, ap); 1870 va_end(ap); 1871 (void)fprintf(stderr, "\n"); 1872 (void)fflush(stderr); 1873 PrintStackTrace(true); 1874 1875 PrintOnError(NULL, "\n"); 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 */ 1887void 1888Punt(const char *fmt, ...) 1889{ 1890 va_list ap; 1891 1892 (void)fflush(stdout); 1893 (void)fprintf(stderr, "%s: ", progname); 1894 va_start(ap, fmt); 1895 (void)vfprintf(stderr, fmt, ap); 1896 va_end(ap); 1897 (void)fprintf(stderr, "\n"); 1898 (void)fflush(stderr); 1899 1900 PrintOnError(NULL, "\n"); 1901 1902 DieHorribly(); 1903} 1904 1905/* Exit without giving a message. */ 1906void 1907DieHorribly(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 */ 1922void 1923Finish(int errs) 1924{ 1925 if (shouldDieQuietly(NULL, -1)) 1926 exit(2); 1927 Fatal("%d error%s", errs, errs == 1 ? "" : "s"); 1928} 1929 1930int 1931unlink_file(const char *file) 1932{ 1933 struct stat st; 1934 1935 if (lstat(file, &st) == -1) 1936 return -1; 1937 1938 if (S_ISDIR(st.st_mode)) { 1939 /* 1940 * POSIX says for unlink: "The path argument shall not name 1941 * a directory unless [...]". 1942 */ 1943 errno = EISDIR; 1944 return -1; 1945 } 1946 return unlink(file); 1947} 1948 1949static void 1950write_all(int fd, const void *data, size_t n) 1951{ 1952 const char *mem = data; 1953 1954 while (n > 0) { 1955 ssize_t written = write(fd, mem, n); 1956 /* XXX: Should this EAGAIN be EINTR? */ 1957 if (written == -1 && errno == EAGAIN) 1958 continue; 1959 if (written == -1) 1960 break; 1961 mem += written; 1962 n -= (size_t)written; 1963 } 1964} 1965 1966/* Print why exec failed, avoiding stdio. */ 1967void MAKE_ATTR_DEAD 1968execDie(const char *af, const char *av) 1969{ 1970 Buffer buf; 1971 1972 Buf_Init(&buf); 1973 Buf_AddStr(&buf, progname); 1974 Buf_AddStr(&buf, ": "); 1975 Buf_AddStr(&buf, af); 1976 Buf_AddStr(&buf, "("); 1977 Buf_AddStr(&buf, av); 1978 Buf_AddStr(&buf, ") failed ("); 1979 Buf_AddStr(&buf, strerror(errno)); 1980 Buf_AddStr(&buf, ")\n"); 1981 1982 write_all(STDERR_FILENO, buf.data, buf.len); 1983 1984 Buf_Done(&buf); 1985 _exit(1); 1986} 1987 1988static void 1989purge_relative_cached_realpaths(void) 1990{ 1991 HashEntry *he, *next; 1992 HashIter hi; 1993 1994 HashIter_Init(&hi, &cached_realpaths); 1995 he = HashIter_Next(&hi); 1996 while (he != NULL) { 1997 next = HashIter_Next(&hi); 1998 if (he->key[0] != '/') { 1999 DEBUG1(DIR, "cached_realpath: purging %s\n", he->key); 2000 HashTable_DeleteEntry(&cached_realpaths, he); 2001 /* 2002 * XXX: What about the allocated he->value? Either 2003 * free them or document why they cannot be freed. 2004 */ 2005 } 2006 he = next; 2007 } 2008} 2009 2010const char * 2011cached_realpath(const char *pathname, char *resolved) 2012{ 2013 const char *rp; 2014 2015 if (pathname == NULL || pathname[0] == '\0') 2016 return NULL; 2017 2018 rp = HashTable_FindValue(&cached_realpaths, pathname); 2019 if (rp != NULL) { 2020 /* a hit */ 2021 strncpy(resolved, rp, MAXPATHLEN); 2022 resolved[MAXPATHLEN - 1] = '\0'; 2023 return resolved; 2024 } 2025 2026 rp = realpath(pathname, resolved); 2027 if (rp != NULL) { 2028 HashTable_Set(&cached_realpaths, pathname, bmake_strdup(rp)); 2029 DEBUG2(DIR, "cached_realpath: %s -> %s\n", pathname, rp); 2030 return resolved; 2031 } 2032 2033 /* should we negative-cache? */ 2034 return NULL; 2035} 2036 2037/* 2038 * Return true if we should die without noise. 2039 * For example our failing child was a sub-make or failure happened elsewhere. 2040 */ 2041bool 2042shouldDieQuietly(GNode *gn, int bf) 2043{ 2044 static int quietly = -1; 2045 2046 if (quietly < 0) { 2047 if (DEBUG(JOB) || 2048 !GetBooleanExpr("${.MAKE.DIE_QUIETLY}", true)) 2049 quietly = 0; 2050 else if (bf >= 0) 2051 quietly = bf; 2052 else 2053 quietly = (gn != NULL && (gn->type & OP_MAKE)) ? 1 : 0; 2054 } 2055 return quietly != 0; 2056} 2057 2058static void 2059SetErrorVars(GNode *gn) 2060{ 2061 StringListNode *ln; 2062 char sts[16]; 2063 2064 /* 2065 * We can print this even if there is no .ERROR target. 2066 */ 2067 snprintf(sts, sizeof(sts), "%d", gn->exit_status); 2068 Global_Set(".ERROR_EXIT", sts); 2069 Global_Set(".ERROR_TARGET", gn->name); 2070 Global_Delete(".ERROR_CMD"); 2071 2072 for (ln = gn->commands.first; ln != NULL; ln = ln->next) { 2073 const char *cmd = ln->datum; 2074 2075 if (cmd == NULL) 2076 break; 2077 Global_Append(".ERROR_CMD", cmd); 2078 } 2079} 2080 2081/* 2082 * Print some helpful information in case of an error. 2083 * The caller should exit soon after calling this function. 2084 */ 2085void 2086PrintOnError(GNode *gn, const char *msg) 2087{ 2088 static GNode *errorNode = NULL; 2089 2090 if (DEBUG(HASH)) { 2091 Targ_Stats(); 2092 Var_Stats(); 2093 } 2094 2095 if (errorNode != NULL) 2096 return; /* we've been here! */ 2097 2098 printf("%s%s: stopped in %s\n", msg, progname, curdir); 2099 2100 /* we generally want to keep quiet if a sub-make died */ 2101 if (shouldDieQuietly(gn, -1)) 2102 return; 2103 2104 if (gn != NULL) 2105 SetErrorVars(gn); 2106 2107 { 2108 char *errorVarsValues = Var_Subst( 2109 "${MAKE_PRINT_VAR_ON_ERROR:@v@$v='${$v}'\n@}", 2110 SCOPE_GLOBAL, VARE_WANTRES); 2111 /* TODO: handle errors */ 2112 printf("%s", errorVarsValues); 2113 free(errorVarsValues); 2114 } 2115 2116 fflush(stdout); 2117 2118 /* 2119 * Finally, see if there is a .ERROR target, and run it if so. 2120 */ 2121 errorNode = Targ_FindNode(".ERROR"); 2122 if (errorNode != NULL) { 2123 errorNode->type |= OP_SPECIAL; 2124 Compat_Make(errorNode, errorNode); 2125 } 2126} 2127 2128void 2129Main_ExportMAKEFLAGS(bool first) 2130{ 2131 static bool once = true; 2132 char *flags; 2133 2134 if (once != first) 2135 return; 2136 once = false; 2137 2138 flags = Var_Subst( 2139 "${.MAKEFLAGS} ${.MAKEOVERRIDES:O:u:@v@$v=${$v:Q}@}", 2140 SCOPE_CMDLINE, VARE_WANTRES); 2141 /* TODO: handle errors */ 2142 if (flags[0] != '\0') 2143 setenv("MAKEFLAGS", flags, 1); 2144} 2145 2146char * 2147getTmpdir(void) 2148{ 2149 static char *tmpdir = NULL; 2150 struct stat st; 2151 2152 if (tmpdir != NULL) 2153 return tmpdir; 2154 2155 /* Honor $TMPDIR if it is valid, strip a trailing '/'. */ 2156 tmpdir = Var_Subst("${TMPDIR:tA:U" _PATH_TMP ":S,/$,,W}/", 2157 SCOPE_GLOBAL, VARE_WANTRES); 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 tfile is provided, set it to a copy of the filename created. 2170 * Otherwise unlink the file once open. 2171 */ 2172int 2173mkTempFile(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 2188 if (pattern[0] == '/') 2189 snprintf(tfile, tfile_sz, "%s", pattern); 2190 else 2191 snprintf(tfile, tfile_sz, "%s%s", tmpdir, pattern); 2192 2193 if ((fd = mkstemp(tfile)) < 0) 2194 Punt("Could not create temporary file %s: %s", tfile, 2195 strerror(errno)); 2196 if (tfile == tbuf) 2197 unlink(tfile); /* we just want the descriptor */ 2198 2199 return fd; 2200} 2201 2202/* 2203 * Convert a string representation of a boolean into a boolean value. 2204 * Anything that looks like "No", "False", "Off", "0" etc. is false, 2205 * the empty string is the fallback, everything else is true. 2206 */ 2207bool 2208ParseBoolean(const char *s, bool fallback) 2209{ 2210 char ch = ch_tolower(s[0]); 2211 if (ch == '\0') 2212 return fallback; 2213 if (ch == '0' || ch == 'f' || ch == 'n') 2214 return false; 2215 if (ch == 'o') 2216 return ch_tolower(s[1]) != 'f'; 2217 return true; 2218} 2219