main.c revision 1.371
1 /* $NetBSD: main.c,v 1.371 2020/10/05 22:45:47 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 * main.c -- 73 * The main file for this entire program. Exit routines etc 74 * reside here. 75 * 76 * Utility functions defined in this file: 77 * Main_ParseArgLine Takes a line of arguments, breaks them and 78 * treats them as if they were given when first 79 * invoked. Used by the parse module to implement 80 * the .MFLAGS target. 81 * 82 * Error Print a tagged error message. The global 83 * MAKE variable must have been defined. This 84 * takes a format string and optional arguments 85 * for it. 86 * 87 * Fatal Print an error message and exit. Also takes 88 * a format string and arguments for it. 89 * 90 * Punt Aborts all jobs and exits with a message. Also 91 * takes a format string and arguments for it. 92 * 93 * Finish Finish things up by printing the number of 94 * errors which occurred, as passed to it, and 95 * exiting. 96 */ 97 98 #include <sys/types.h> 99 #include <sys/time.h> 100 #include <sys/param.h> 101 #include <sys/resource.h> 102 #include <sys/stat.h> 103 #ifdef MAKE_NATIVE 104 #include <sys/sysctl.h> 105 #endif 106 #include <sys/utsname.h> 107 #include <sys/wait.h> 108 109 #include <errno.h> 110 #include <signal.h> 111 #include <stdarg.h> 112 #include <time.h> 113 114 #include "make.h" 115 #include "dir.h" 116 #include "job.h" 117 #include "pathnames.h" 118 #include "trace.h" 119 120 #ifdef USE_IOVEC 121 #include <sys/uio.h> 122 #endif 123 124 /* "@(#)main.c 8.3 (Berkeley) 3/19/94" */ 125 MAKE_RCSID("$NetBSD: main.c,v 1.371 2020/10/05 22:45:47 rillig Exp $"); 126 #if defined(MAKE_NATIVE) && !defined(lint) 127 __COPYRIGHT("@(#) Copyright (c) 1988, 1989, 1990, 1993 " 128 "The Regents of the University of California. " 129 "All rights reserved."); 130 #endif 131 132 #ifndef DEFMAXLOCAL 133 #define DEFMAXLOCAL DEFMAXJOBS 134 #endif 135 136 StringList * create; /* Targets to be made */ 137 time_t now; /* Time at start of make */ 138 GNode *DEFAULT; /* .DEFAULT node */ 139 Boolean allPrecious; /* .PRECIOUS given on line by itself */ 140 Boolean deleteOnError; /* .DELETE_ON_ERROR: set */ 141 142 static Boolean noBuiltins; /* -r flag */ 143 static StringList * makefiles; /* ordered list of makefiles to read */ 144 static int printVars; /* -[vV] argument */ 145 #define COMPAT_VARS 1 146 #define EXPAND_VARS 2 147 static StringList * variables; /* list of variables to print 148 * (for -v and -V) */ 149 int maxJobs; /* -j argument */ 150 static int maxJobTokens; /* -j argument */ 151 Boolean compatMake; /* -B argument */ 152 int debug; /* -d argument */ 153 Boolean debugVflag; /* -dV */ 154 Boolean noExecute; /* -n flag */ 155 Boolean noRecursiveExecute; /* -N flag */ 156 Boolean keepgoing; /* -k flag */ 157 Boolean queryFlag; /* -q flag */ 158 Boolean touchFlag; /* -t flag */ 159 Boolean enterFlag; /* -w flag */ 160 Boolean enterFlagObj; /* -w and objdir != srcdir */ 161 Boolean ignoreErrors; /* -i flag */ 162 Boolean beSilent; /* -s flag */ 163 Boolean oldVars; /* variable substitution style */ 164 Boolean checkEnvFirst; /* -e flag */ 165 Boolean parseWarnFatal; /* -W flag */ 166 static int jp_0 = -1, jp_1 = -1; /* ends of parent job pipe */ 167 Boolean varNoExportEnv; /* -X flag */ 168 Boolean doing_depend; /* Set while reading .depend */ 169 static Boolean jobsRunning; /* TRUE if the jobs might be running */ 170 static const char * tracefile; 171 static int ReadMakefile(const char *); 172 static void usage(void) MAKE_ATTR_DEAD; 173 static void purge_cached_realpaths(void); 174 175 static Boolean ignorePWD; /* if we use -C, PWD is meaningless */ 176 static char objdir[MAXPATHLEN + 1]; /* where we chdir'ed to */ 177 char curdir[MAXPATHLEN + 1]; /* Startup directory */ 178 char *progname; /* the program name */ 179 char *makeDependfile; 180 pid_t myPid; 181 int makelevel; 182 183 FILE *debug_file; 184 185 Boolean forceJobs = FALSE; 186 187 extern SearchPath *parseIncPath; 188 189 /* 190 * For compatibility with the POSIX version of MAKEFLAGS that includes 191 * all the options with out -, convert flags to -f -l -a -g -s. 192 */ 193 static char * 194 explode(const char *flags) 195 { 196 size_t len; 197 char *nf, *st; 198 const char *f; 199 200 if (flags == NULL) 201 return NULL; 202 203 for (f = flags; *f; f++) 204 if (!ch_isalpha(*f)) 205 break; 206 207 if (*f) 208 return bmake_strdup(flags); 209 210 len = strlen(flags); 211 st = nf = bmake_malloc(len * 3 + 1); 212 while (*flags) { 213 *nf++ = '-'; 214 *nf++ = *flags++; 215 *nf++ = ' '; 216 } 217 *nf = '\0'; 218 return st; 219 } 220 221 static void 222 parse_debug_option_F(const char *modules) 223 { 224 const char *mode; 225 size_t len; 226 char *fname; 227 228 if (debug_file != stdout && debug_file != stderr) 229 fclose(debug_file); 230 231 if (*modules == '+') { 232 modules++; 233 mode = "a"; 234 } else 235 mode = "w"; 236 237 if (strcmp(modules, "stdout") == 0) { 238 debug_file = stdout; 239 return; 240 } 241 if (strcmp(modules, "stderr") == 0) { 242 debug_file = stderr; 243 return; 244 } 245 246 len = strlen(modules); 247 fname = bmake_malloc(len + 20); 248 memcpy(fname, modules, len + 1); 249 250 /* Let the filename be modified by the pid */ 251 if (strcmp(fname + len - 3, ".%d") == 0) 252 snprintf(fname + len - 2, 20, "%d", getpid()); 253 254 debug_file = fopen(fname, mode); 255 if (!debug_file) { 256 fprintf(stderr, "Cannot open debug file %s\n", 257 fname); 258 usage(); 259 } 260 free(fname); 261 } 262 263 static void 264 parse_debug_options(const char *argvalue) 265 { 266 const char *modules; 267 268 for (modules = argvalue; *modules; ++modules) { 269 switch (*modules) { 270 case '0': /* undocumented, only intended for tests */ 271 debug &= DEBUG_LINT; 272 break; 273 case 'A': 274 debug = ~(0|DEBUG_LINT); 275 break; 276 case 'a': 277 debug |= DEBUG_ARCH; 278 break; 279 case 'C': 280 debug |= DEBUG_CWD; 281 break; 282 case 'c': 283 debug |= DEBUG_COND; 284 break; 285 case 'd': 286 debug |= DEBUG_DIR; 287 break; 288 case 'e': 289 debug |= DEBUG_ERROR; 290 break; 291 case 'f': 292 debug |= DEBUG_FOR; 293 break; 294 case 'g': 295 if (modules[1] == '1') { 296 debug |= DEBUG_GRAPH1; 297 ++modules; 298 } 299 else if (modules[1] == '2') { 300 debug |= DEBUG_GRAPH2; 301 ++modules; 302 } 303 else if (modules[1] == '3') { 304 debug |= DEBUG_GRAPH3; 305 ++modules; 306 } 307 break; 308 case 'h': 309 debug |= DEBUG_HASH; 310 break; 311 case 'j': 312 debug |= DEBUG_JOB; 313 break; 314 case 'L': 315 debug |= DEBUG_LINT; 316 break; 317 case 'l': 318 debug |= DEBUG_LOUD; 319 break; 320 case 'M': 321 debug |= DEBUG_META; 322 break; 323 case 'm': 324 debug |= DEBUG_MAKE; 325 break; 326 case 'n': 327 debug |= DEBUG_SCRIPT; 328 break; 329 case 'p': 330 debug |= DEBUG_PARSE; 331 break; 332 case 's': 333 debug |= DEBUG_SUFF; 334 break; 335 case 't': 336 debug |= DEBUG_TARG; 337 break; 338 case 'V': 339 debugVflag = TRUE; 340 break; 341 case 'v': 342 debug |= DEBUG_VAR; 343 break; 344 case 'x': 345 debug |= DEBUG_SHELL; 346 break; 347 case 'F': 348 parse_debug_option_F(modules + 1); 349 goto debug_setbuf; 350 default: 351 (void)fprintf(stderr, 352 "%s: illegal argument to d option -- %c\n", 353 progname, *modules); 354 usage(); 355 } 356 } 357 debug_setbuf: 358 /* 359 * Make the debug_file unbuffered, and make 360 * stdout line buffered (unless debugfile == stdout). 361 */ 362 setvbuf(debug_file, NULL, _IONBF, 0); 363 if (debug_file != stdout) { 364 setvbuf(stdout, NULL, _IOLBF, 0); 365 } 366 } 367 368 /* 369 * does path contain any relative components 370 */ 371 static Boolean 372 is_relpath(const char *path) 373 { 374 const char *cp; 375 376 if (path[0] != '/') 377 return TRUE; 378 cp = path; 379 while ((cp = strstr(cp, "/.")) != NULL) { 380 cp += 2; 381 if (cp[0] == '/' || cp[0] == '\0') 382 return TRUE; 383 else if (cp[0] == '.') { 384 if (cp[1] == '/' || cp[1] == '\0') 385 return TRUE; 386 } 387 } 388 return FALSE; 389 } 390 391 static void 392 MainParseArgChdir(const char *argvalue) 393 { 394 struct stat sa, sb; 395 396 if (chdir(argvalue) == -1) { 397 (void)fprintf(stderr, "%s: chdir %s: %s\n", 398 progname, argvalue, strerror(errno)); 399 exit(1); 400 } 401 if (getcwd(curdir, MAXPATHLEN) == NULL) { 402 (void)fprintf(stderr, "%s: %s.\n", progname, strerror(errno)); 403 exit(2); 404 } 405 if (!is_relpath(argvalue) && 406 stat(argvalue, &sa) != -1 && 407 stat(curdir, &sb) != -1 && 408 sa.st_ino == sb.st_ino && 409 sa.st_dev == sb.st_dev) 410 strncpy(curdir, argvalue, MAXPATHLEN); 411 ignorePWD = TRUE; 412 } 413 414 static void 415 MainParseArgJobsInternal(const char *argvalue) 416 { 417 if (sscanf(argvalue, "%d,%d", &jp_0, &jp_1) != 2) { 418 (void)fprintf(stderr, 419 "%s: internal error -- J option malformed (%s)\n", 420 progname, argvalue); 421 usage(); 422 } 423 if ((fcntl(jp_0, F_GETFD, 0) < 0) || 424 (fcntl(jp_1, F_GETFD, 0) < 0)) { 425 #if 0 426 (void)fprintf(stderr, 427 "%s: ###### warning -- J descriptors were closed!\n", 428 progname); 429 exit(2); 430 #endif 431 jp_0 = -1; 432 jp_1 = -1; 433 compatMake = TRUE; 434 } else { 435 Var_Append(MAKEFLAGS, "-J", VAR_GLOBAL); 436 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 437 } 438 } 439 440 static void 441 MainParseArgJobs(const char *argvalue) 442 { 443 char *p; 444 445 forceJobs = TRUE; 446 maxJobs = (int)strtol(argvalue, &p, 0); 447 if (*p != '\0' || maxJobs < 1) { 448 (void)fprintf(stderr, 449 "%s: illegal argument to -j -- must be positive integer!\n", 450 progname); 451 exit(1); /* XXX: why not 2? */ 452 } 453 Var_Append(MAKEFLAGS, "-j", VAR_GLOBAL); 454 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 455 Var_Set(".MAKE.JOBS", argvalue, VAR_GLOBAL); 456 maxJobTokens = maxJobs; 457 } 458 459 static void 460 MainParseArgSysInc(const char *argvalue) 461 { 462 /* look for magic parent directory search string */ 463 if (strncmp(".../", argvalue, 4) == 0) { 464 char *found_path = Dir_FindHereOrAbove(curdir, argvalue + 4); 465 if (found_path == NULL) 466 return; 467 (void)Dir_AddDir(sysIncPath, found_path); 468 free(found_path); 469 } else { 470 (void)Dir_AddDir(sysIncPath, argvalue); 471 } 472 Var_Append(MAKEFLAGS, "-m", VAR_GLOBAL); 473 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 474 } 475 476 static Boolean 477 MainParseArg(char c, const char *argvalue) 478 { 479 switch (c) { 480 case '\0': 481 break; 482 case 'B': 483 compatMake = TRUE; 484 Var_Append(MAKEFLAGS, "-B", VAR_GLOBAL); 485 Var_Set(MAKE_MODE, "compat", VAR_GLOBAL); 486 break; 487 case 'C': 488 MainParseArgChdir(argvalue); 489 break; 490 case 'D': 491 if (argvalue[0] == '\0') return FALSE; 492 Var_Set(argvalue, "1", VAR_GLOBAL); 493 Var_Append(MAKEFLAGS, "-D", VAR_GLOBAL); 494 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 495 break; 496 case 'I': 497 Parse_AddIncludeDir(argvalue); 498 Var_Append(MAKEFLAGS, "-I", VAR_GLOBAL); 499 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 500 break; 501 case 'J': 502 MainParseArgJobsInternal(argvalue); 503 break; 504 case 'N': 505 noExecute = TRUE; 506 noRecursiveExecute = TRUE; 507 Var_Append(MAKEFLAGS, "-N", VAR_GLOBAL); 508 break; 509 case 'S': 510 keepgoing = FALSE; 511 Var_Append(MAKEFLAGS, "-S", VAR_GLOBAL); 512 break; 513 case 'T': 514 tracefile = bmake_strdup(argvalue); 515 Var_Append(MAKEFLAGS, "-T", VAR_GLOBAL); 516 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 517 break; 518 case 'V': 519 case 'v': 520 printVars = c == 'v' ? EXPAND_VARS : COMPAT_VARS; 521 Lst_Append(variables, bmake_strdup(argvalue)); 522 Var_Append(MAKEFLAGS, "-V", VAR_GLOBAL); 523 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 524 break; 525 case 'W': 526 parseWarnFatal = TRUE; 527 break; 528 case 'X': 529 varNoExportEnv = TRUE; 530 Var_Append(MAKEFLAGS, "-X", VAR_GLOBAL); 531 break; 532 case 'd': 533 /* If '-d-opts' don't pass to children */ 534 if (argvalue[0] == '-') 535 argvalue++; 536 else { 537 Var_Append(MAKEFLAGS, "-d", VAR_GLOBAL); 538 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 539 } 540 parse_debug_options(argvalue); 541 break; 542 case 'e': 543 checkEnvFirst = TRUE; 544 Var_Append(MAKEFLAGS, "-e", VAR_GLOBAL); 545 break; 546 case 'f': 547 Lst_Append(makefiles, bmake_strdup(argvalue)); 548 break; 549 case 'i': 550 ignoreErrors = TRUE; 551 Var_Append(MAKEFLAGS, "-i", VAR_GLOBAL); 552 break; 553 case 'j': 554 MainParseArgJobs(argvalue); 555 break; 556 case 'k': 557 keepgoing = TRUE; 558 Var_Append(MAKEFLAGS, "-k", VAR_GLOBAL); 559 break; 560 case 'm': 561 MainParseArgSysInc(argvalue); 562 break; 563 case 'n': 564 noExecute = TRUE; 565 Var_Append(MAKEFLAGS, "-n", VAR_GLOBAL); 566 break; 567 case 'q': 568 queryFlag = TRUE; 569 /* Kind of nonsensical, wot? */ 570 Var_Append(MAKEFLAGS, "-q", VAR_GLOBAL); 571 break; 572 case 'r': 573 noBuiltins = TRUE; 574 Var_Append(MAKEFLAGS, "-r", VAR_GLOBAL); 575 break; 576 case 's': 577 beSilent = TRUE; 578 Var_Append(MAKEFLAGS, "-s", VAR_GLOBAL); 579 break; 580 case 't': 581 touchFlag = TRUE; 582 Var_Append(MAKEFLAGS, "-t", VAR_GLOBAL); 583 break; 584 case 'w': 585 enterFlag = TRUE; 586 Var_Append(MAKEFLAGS, "-w", VAR_GLOBAL); 587 break; 588 default: 589 case '?': 590 usage(); 591 } 592 return TRUE; 593 } 594 595 /* Parse the given arguments. Called from main() and from 596 * Main_ParseArgLine() when the .MAKEFLAGS target is used. 597 * 598 * The arguments must be treated as read-only and will be freed after the 599 * call. 600 * 601 * XXX: Deal with command line overriding .MAKEFLAGS in makefile */ 602 static void 603 MainParseArgs(int argc, char **argv) 604 { 605 char c; 606 int arginc; 607 char *argvalue; 608 char *optscan; 609 Boolean inOption, dashDash = FALSE; 610 611 const char *optspecs = "BC:D:I:J:NST:V:WXd:ef:ij:km:nqrstv:w"; 612 /* Can't actually use getopt(3) because rescanning is not portable */ 613 614 rearg: 615 inOption = FALSE; 616 optscan = NULL; 617 while (argc > 1) { 618 const char *optspec; 619 if (!inOption) 620 optscan = argv[1]; 621 c = *optscan++; 622 arginc = 0; 623 if (inOption) { 624 if (c == '\0') { 625 ++argv; 626 --argc; 627 inOption = FALSE; 628 continue; 629 } 630 } else { 631 if (c != '-' || dashDash) 632 break; 633 inOption = TRUE; 634 c = *optscan++; 635 } 636 /* '-' found at some earlier point */ 637 optspec = strchr(optspecs, c); 638 if (c != '\0' && optspec != NULL && optspec[1] == ':') { 639 /* -<something> found, and <something> should have an arg */ 640 inOption = FALSE; 641 arginc = 1; 642 argvalue = optscan; 643 if (*argvalue == '\0') { 644 if (argc < 3) 645 goto noarg; 646 argvalue = argv[2]; 647 arginc = 2; 648 } 649 } else { 650 argvalue = NULL; 651 } 652 switch (c) { 653 case '\0': 654 arginc = 1; 655 inOption = FALSE; 656 break; 657 case '-': 658 dashDash = TRUE; 659 break; 660 default: 661 if (!MainParseArg(c, argvalue)) 662 goto noarg; 663 } 664 argv += arginc; 665 argc -= arginc; 666 } 667 668 oldVars = TRUE; 669 670 /* 671 * See if the rest of the arguments are variable assignments and 672 * perform them if so. Else take them to be targets and stuff them 673 * on the end of the "create" list. 674 */ 675 for (; argc > 1; ++argv, --argc) { 676 VarAssign var; 677 if (Parse_IsVar(argv[1], &var)) { 678 Parse_DoVar(&var, VAR_CMD); 679 } else { 680 if (!*argv[1]) 681 Punt("illegal (null) argument."); 682 if (*argv[1] == '-' && !dashDash) 683 goto rearg; 684 Lst_Append(create, bmake_strdup(argv[1])); 685 } 686 } 687 688 return; 689 noarg: 690 (void)fprintf(stderr, "%s: option requires an argument -- %c\n", 691 progname, c); 692 usage(); 693 } 694 695 /* Break a line of arguments into words and parse them. 696 * 697 * Used when a .MFLAGS or .MAKEFLAGS target is encountered during parsing and 698 * by main() when reading the MAKEFLAGS environment variable. */ 699 void 700 Main_ParseArgLine(const char *line) 701 { 702 Words words; 703 char *p1; 704 const char *argv0 = Var_Value(".MAKE", VAR_GLOBAL, &p1); 705 char *buf; 706 707 if (line == NULL) 708 return; 709 for (; *line == ' '; ++line) 710 continue; 711 if (!*line) 712 return; 713 714 buf = str_concat3(argv0, " ", line); 715 free(p1); 716 717 words = Str_Words(buf, TRUE); 718 if (words.words == NULL) { 719 Error("Unterminated quoted string [%s]", buf); 720 free(buf); 721 return; 722 } 723 free(buf); 724 MainParseArgs((int)words.len, words.words); 725 726 Words_Free(words); 727 } 728 729 Boolean 730 Main_SetObjdir(const char *fmt, ...) 731 { 732 struct stat sb; 733 char *path; 734 char buf[MAXPATHLEN + 1]; 735 char buf2[MAXPATHLEN + 1]; 736 Boolean rc = FALSE; 737 va_list ap; 738 739 va_start(ap, fmt); 740 vsnprintf(path = buf, MAXPATHLEN, fmt, ap); 741 va_end(ap); 742 743 if (path[0] != '/') { 744 snprintf(buf2, MAXPATHLEN, "%s/%s", curdir, path); 745 path = buf2; 746 } 747 748 /* look for the directory and try to chdir there */ 749 if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) { 750 if (chdir(path)) { 751 (void)fprintf(stderr, "make warning: %s: %s.\n", 752 path, strerror(errno)); 753 } else { 754 snprintf(objdir, sizeof objdir, "%s", path); 755 Var_Set(".OBJDIR", objdir, VAR_GLOBAL); 756 setenv("PWD", objdir, 1); 757 Dir_InitDot(); 758 purge_cached_realpaths(); 759 rc = TRUE; 760 if (enterFlag && strcmp(objdir, curdir) != 0) 761 enterFlagObj = TRUE; 762 } 763 } 764 765 return rc; 766 } 767 768 static Boolean 769 Main_SetVarObjdir(const char *var, const char *suffix) 770 { 771 char *path_freeIt; 772 const char *path = Var_Value(var, VAR_CMD, &path_freeIt); 773 const char *xpath; 774 char *xpath_freeIt; 775 776 if (path == NULL || path[0] == '\0') { 777 bmake_free(path_freeIt); 778 return FALSE; 779 } 780 781 /* expand variable substitutions */ 782 xpath = path; 783 xpath_freeIt = NULL; 784 if (strchr(path, '$') != 0) { 785 (void)Var_Subst(path, VAR_GLOBAL, VARE_WANTRES, &xpath_freeIt); 786 /* TODO: handle errors */ 787 xpath = xpath_freeIt; 788 } 789 790 (void)Main_SetObjdir("%s%s", xpath, suffix); 791 792 bmake_free(xpath_freeIt); 793 bmake_free(path_freeIt); 794 return TRUE; 795 } 796 797 /* Read and parse the makefile. 798 * Return TRUE if reading the makefile succeeded, for Lst_Find. */ 799 static Boolean 800 ReadMakefileSucceeded(const void *fname, const void *unused) 801 { 802 return ReadMakefile(fname) == 0; 803 } 804 805 /* Read and parse the makefile. 806 * Return TRUE if reading the makefile failed, for Lst_Find. */ 807 static Boolean 808 ReadMakefileFailed(const void *fname, const void *unused) 809 { 810 return ReadMakefile(fname) != 0; 811 } 812 813 int 814 str2Lst_Append(StringList *lp, char *str, const char *sep) 815 { 816 char *cp; 817 int n; 818 819 if (!sep) 820 sep = " \t"; 821 822 for (n = 0, cp = strtok(str, sep); cp; cp = strtok(NULL, sep)) { 823 Lst_Append(lp, cp); 824 n++; 825 } 826 return n; 827 } 828 829 #ifdef SIGINFO 830 /*ARGSUSED*/ 831 static void 832 siginfo(int signo MAKE_ATTR_UNUSED) 833 { 834 char dir[MAXPATHLEN]; 835 char str[2 * MAXPATHLEN]; 836 int len; 837 if (getcwd(dir, sizeof(dir)) == NULL) 838 return; 839 len = snprintf(str, sizeof(str), "%s: Working in: %s\n", progname, dir); 840 if (len > 0) 841 (void)write(STDERR_FILENO, str, (size_t)len); 842 } 843 #endif 844 845 /* 846 * Allow makefiles some control over the mode we run in. 847 */ 848 void 849 MakeMode(const char *mode) 850 { 851 char *mode_freeIt = NULL; 852 853 if (mode == NULL) { 854 (void)Var_Subst("${" MAKE_MODE ":tl}", 855 VAR_GLOBAL, VARE_WANTRES, &mode_freeIt); 856 /* TODO: handle errors */ 857 mode = mode_freeIt; 858 } 859 860 if (mode[0] != '\0') { 861 if (strstr(mode, "compat")) { 862 compatMake = TRUE; 863 forceJobs = FALSE; 864 } 865 #if USE_META 866 if (strstr(mode, "meta")) 867 meta_mode_init(mode); 868 #endif 869 } 870 871 free(mode_freeIt); 872 } 873 874 static void 875 doPrintVars(void) 876 { 877 StringListNode *ln; 878 Boolean expandVars; 879 880 if (printVars == EXPAND_VARS) 881 expandVars = TRUE; 882 else if (debugVflag) 883 expandVars = FALSE; 884 else 885 expandVars = getBoolean(".MAKE.EXPAND_VARIABLES", FALSE); 886 887 for (ln = variables->first; ln != NULL; ln = ln->next) { 888 const char *var = ln->datum; 889 const char *value; 890 char *p1; 891 892 if (strchr(var, '$')) { 893 (void)Var_Subst(var, VAR_GLOBAL, VARE_WANTRES, &p1); 894 /* TODO: handle errors */ 895 value = p1; 896 } else if (expandVars) { 897 char *expr = str_concat3("${", var, "}"); 898 (void)Var_Subst(expr, VAR_GLOBAL, VARE_WANTRES, &p1); 899 /* TODO: handle errors */ 900 value = p1; 901 free(expr); 902 } else { 903 value = Var_Value(var, VAR_GLOBAL, &p1); 904 } 905 printf("%s\n", value ? value : ""); 906 bmake_free(p1); 907 } 908 } 909 910 static Boolean 911 runTargets(void) 912 { 913 GNodeList *targs; /* target nodes to create -- passed to Make_Init */ 914 Boolean outOfDate; /* FALSE if all targets up to date */ 915 916 /* 917 * Have now read the entire graph and need to make a list of 918 * targets to create. If none was given on the command line, 919 * we consult the parsing module to find the main target(s) 920 * to create. 921 */ 922 if (Lst_IsEmpty(create)) 923 targs = Parse_MainName(); 924 else 925 targs = Targ_FindList(create); 926 927 if (!compatMake) { 928 /* 929 * Initialize job module before traversing the graph 930 * now that any .BEGIN and .END targets have been read. 931 * This is done only if the -q flag wasn't given 932 * (to prevent the .BEGIN from being executed should 933 * it exist). 934 */ 935 if (!queryFlag) { 936 Job_Init(); 937 jobsRunning = TRUE; 938 } 939 940 /* Traverse the graph, checking on all the targets */ 941 outOfDate = Make_Run(targs); 942 } else { 943 /* 944 * Compat_Init will take care of creating all the 945 * targets as well as initializing the module. 946 */ 947 Compat_Run(targs); 948 outOfDate = FALSE; 949 } 950 Lst_Free(targs); 951 return outOfDate; 952 } 953 954 /* 955 * Set up the .TARGETS variable to contain the list of targets to be 956 * created. If none specified, make the variable empty -- the parser 957 * will fill the thing in with the default or .MAIN target. 958 */ 959 static void 960 InitVarTargets(void) 961 { 962 StringListNode *ln; 963 964 if (Lst_IsEmpty(create)) { 965 Var_Set(".TARGETS", "", VAR_GLOBAL); 966 return; 967 } 968 969 for (ln = create->first; ln != NULL; ln = ln->next) { 970 char *name = ln->datum; 971 Var_Append(".TARGETS", name, VAR_GLOBAL); 972 } 973 } 974 975 static const char * 976 init_machine(const struct utsname *utsname) 977 { 978 const char *machine = getenv("MACHINE"); 979 if (machine != NULL) 980 return machine; 981 982 #ifdef MAKE_NATIVE 983 return utsname->machine; 984 #else 985 #ifdef MAKE_MACHINE 986 return MAKE_MACHINE; 987 #else 988 return "unknown"; 989 #endif 990 #endif 991 } 992 993 static const char * 994 init_machine_arch(void) 995 { 996 const char *env = getenv("MACHINE_ARCH"); 997 if (env != NULL) 998 return env; 999 1000 #ifdef MAKE_NATIVE 1001 { 1002 struct utsname utsname; 1003 static char machine_arch_buf[sizeof(utsname.machine)]; 1004 const int mib[2] = { CTL_HW, HW_MACHINE_ARCH }; 1005 size_t len = sizeof(machine_arch_buf); 1006 1007 if (sysctl(mib, __arraycount(mib), machine_arch_buf, 1008 &len, NULL, 0) < 0) { 1009 (void)fprintf(stderr, "%s: sysctl failed (%s).\n", progname, 1010 strerror(errno)); 1011 exit(2); 1012 } 1013 1014 return machine_arch_buf; 1015 } 1016 #else 1017 #ifndef MACHINE_ARCH 1018 #ifdef MAKE_MACHINE_ARCH 1019 return MAKE_MACHINE_ARCH; 1020 #else 1021 return "unknown"; 1022 #endif 1023 #else 1024 return MACHINE_ARCH; 1025 #endif 1026 #endif 1027 } 1028 1029 /*- 1030 * main -- 1031 * The main function, for obvious reasons. Initializes variables 1032 * and a few modules, then parses the arguments give it in the 1033 * environment and on the command line. Reads the system makefile 1034 * followed by either Makefile, makefile or the file given by the 1035 * -f argument. Sets the .MAKEFLAGS PMake variable based on all the 1036 * flags it has received by then uses either the Make or the Compat 1037 * module to create the initial list of targets. 1038 * 1039 * Results: 1040 * If -q was given, exits -1 if anything was out-of-date. Else it exits 1041 * 0. 1042 * 1043 * Side Effects: 1044 * The program exits when done. Targets are created. etc. etc. etc. 1045 */ 1046 int 1047 main(int argc, char **argv) 1048 { 1049 Boolean outOfDate; /* FALSE if all targets up to date */ 1050 struct stat sb, sa; 1051 char *p1, *path; 1052 char mdpath[MAXPATHLEN]; 1053 const char *machine; 1054 const char *machine_arch; 1055 char *syspath = getenv("MAKESYSPATH"); 1056 StringList *sysMkPath; /* Path of sys.mk */ 1057 char *cp = NULL, *start; 1058 /* avoid faults on read-only strings */ 1059 static char defsyspath[] = _PATH_DEFSYSPATH; 1060 struct timeval rightnow; /* to initialize random seed */ 1061 struct utsname utsname; 1062 1063 /* default to writing debug to stderr */ 1064 debug_file = stderr; 1065 1066 #ifdef SIGINFO 1067 (void)bmake_signal(SIGINFO, siginfo); 1068 #endif 1069 /* 1070 * Set the seed to produce a different random sequence 1071 * on each program execution. 1072 */ 1073 gettimeofday(&rightnow, NULL); 1074 srandom((unsigned int)(rightnow.tv_sec + rightnow.tv_usec)); 1075 1076 if ((progname = strrchr(argv[0], '/')) != NULL) 1077 progname++; 1078 else 1079 progname = argv[0]; 1080 #if defined(MAKE_NATIVE) || (defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE)) 1081 /* 1082 * get rid of resource limit on file descriptors 1083 */ 1084 { 1085 struct rlimit rl; 1086 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 && 1087 rl.rlim_cur != rl.rlim_max) { 1088 rl.rlim_cur = rl.rlim_max; 1089 (void)setrlimit(RLIMIT_NOFILE, &rl); 1090 } 1091 } 1092 #endif 1093 1094 if (uname(&utsname) == -1) { 1095 (void)fprintf(stderr, "%s: uname failed (%s).\n", progname, 1096 strerror(errno)); 1097 exit(2); 1098 } 1099 1100 /* 1101 * Get the name of this type of MACHINE from utsname 1102 * so we can share an executable for similar machines. 1103 * (i.e. m68k: amiga hp300, mac68k, sun3, ...) 1104 * 1105 * Note that both MACHINE and MACHINE_ARCH are decided at 1106 * run-time. 1107 */ 1108 machine = init_machine(&utsname); 1109 machine_arch = init_machine_arch(); 1110 1111 myPid = getpid(); /* remember this for vFork() */ 1112 1113 /* 1114 * Just in case MAKEOBJDIR wants us to do something tricky. 1115 */ 1116 Var_Init(); /* Initialize the lists of variables for 1117 * parsing arguments */ 1118 Var_Set(".MAKE.OS", utsname.sysname, VAR_GLOBAL); 1119 Var_Set("MACHINE", machine, VAR_GLOBAL); 1120 Var_Set("MACHINE_ARCH", machine_arch, VAR_GLOBAL); 1121 #ifdef MAKE_VERSION 1122 Var_Set("MAKE_VERSION", MAKE_VERSION, VAR_GLOBAL); 1123 #endif 1124 Var_Set(".newline", "\n", VAR_GLOBAL); /* handy for :@ loops */ 1125 /* 1126 * This is the traditional preference for makefiles. 1127 */ 1128 #ifndef MAKEFILE_PREFERENCE_LIST 1129 # define MAKEFILE_PREFERENCE_LIST "makefile Makefile" 1130 #endif 1131 Var_Set(MAKEFILE_PREFERENCE, MAKEFILE_PREFERENCE_LIST, 1132 VAR_GLOBAL); 1133 Var_Set(MAKE_DEPENDFILE, ".depend", VAR_GLOBAL); 1134 1135 create = Lst_Init(); 1136 makefiles = Lst_Init(); 1137 printVars = 0; 1138 debugVflag = FALSE; 1139 variables = Lst_Init(); 1140 beSilent = FALSE; /* Print commands as executed */ 1141 ignoreErrors = FALSE; /* Pay attention to non-zero returns */ 1142 noExecute = FALSE; /* Execute all commands */ 1143 noRecursiveExecute = FALSE; /* Execute all .MAKE targets */ 1144 keepgoing = FALSE; /* Stop on error */ 1145 allPrecious = FALSE; /* Remove targets when interrupted */ 1146 deleteOnError = FALSE; /* Historical default behavior */ 1147 queryFlag = FALSE; /* This is not just a check-run */ 1148 noBuiltins = FALSE; /* Read the built-in rules */ 1149 touchFlag = FALSE; /* Actually update targets */ 1150 debug = 0; /* No debug verbosity, please. */ 1151 jobsRunning = FALSE; 1152 1153 maxJobs = DEFMAXLOCAL; /* Set default local max concurrency */ 1154 maxJobTokens = maxJobs; 1155 compatMake = FALSE; /* No compat mode */ 1156 ignorePWD = FALSE; 1157 1158 /* 1159 * Initialize the parsing, directory and variable modules to prepare 1160 * for the reading of inclusion paths and variable settings on the 1161 * command line 1162 */ 1163 1164 /* 1165 * Initialize various variables. 1166 * MAKE also gets this name, for compatibility 1167 * .MAKEFLAGS gets set to the empty string just in case. 1168 * MFLAGS also gets initialized empty, for compatibility. 1169 */ 1170 Parse_Init(); 1171 if (argv[0][0] == '/' || strchr(argv[0], '/') == NULL) { 1172 /* 1173 * Leave alone if it is an absolute path, or if it does 1174 * not contain a '/' in which case we need to find it in 1175 * the path, like execvp(3) and the shells do. 1176 */ 1177 p1 = argv[0]; 1178 } else { 1179 /* 1180 * A relative path, canonicalize it. 1181 */ 1182 p1 = cached_realpath(argv[0], mdpath); 1183 if (!p1 || *p1 != '/' || stat(p1, &sb) < 0) { 1184 p1 = argv[0]; /* realpath failed */ 1185 } 1186 } 1187 Var_Set("MAKE", p1, VAR_GLOBAL); 1188 Var_Set(".MAKE", p1, VAR_GLOBAL); 1189 Var_Set(MAKEFLAGS, "", VAR_GLOBAL); 1190 Var_Set(MAKEOVERRIDES, "", VAR_GLOBAL); 1191 Var_Set("MFLAGS", "", VAR_GLOBAL); 1192 Var_Set(".ALLTARGETS", "", VAR_GLOBAL); 1193 /* some makefiles need to know this */ 1194 Var_Set(MAKE_LEVEL ".ENV", MAKE_LEVEL_ENV, VAR_CMD); 1195 1196 /* 1197 * Set some other useful macros 1198 */ 1199 { 1200 char tmp[64], *ep; 1201 1202 makelevel = ((ep = getenv(MAKE_LEVEL_ENV)) && *ep) ? atoi(ep) : 0; 1203 if (makelevel < 0) 1204 makelevel = 0; 1205 snprintf(tmp, sizeof(tmp), "%d", makelevel); 1206 Var_Set(MAKE_LEVEL, tmp, VAR_GLOBAL); 1207 snprintf(tmp, sizeof(tmp), "%u", myPid); 1208 Var_Set(".MAKE.PID", tmp, VAR_GLOBAL); 1209 snprintf(tmp, sizeof(tmp), "%u", getppid()); 1210 Var_Set(".MAKE.PPID", tmp, VAR_GLOBAL); 1211 } 1212 if (makelevel > 0) { 1213 char pn[1024]; 1214 snprintf(pn, sizeof(pn), "%s[%d]", progname, makelevel); 1215 progname = bmake_strdup(pn); 1216 } 1217 1218 #ifdef USE_META 1219 meta_init(); 1220 #endif 1221 Dir_Init(); 1222 1223 /* 1224 * First snag any flags out of the MAKE environment variable. 1225 * (Note this is *not* MAKEFLAGS since /bin/make uses that and it's 1226 * in a different format). 1227 */ 1228 #ifdef POSIX 1229 p1 = explode(getenv("MAKEFLAGS")); 1230 Main_ParseArgLine(p1); 1231 free(p1); 1232 #else 1233 Main_ParseArgLine(getenv("MAKE")); 1234 #endif 1235 1236 /* 1237 * Find where we are (now). 1238 * We take care of PWD for the automounter below... 1239 */ 1240 if (getcwd(curdir, MAXPATHLEN) == NULL) { 1241 (void)fprintf(stderr, "%s: getcwd: %s.\n", 1242 progname, strerror(errno)); 1243 exit(2); 1244 } 1245 1246 MainParseArgs(argc, argv); 1247 1248 if (enterFlag) 1249 printf("%s: Entering directory `%s'\n", progname, curdir); 1250 1251 /* 1252 * Verify that cwd is sane. 1253 */ 1254 if (stat(curdir, &sa) == -1) { 1255 (void)fprintf(stderr, "%s: %s: %s.\n", 1256 progname, curdir, strerror(errno)); 1257 exit(2); 1258 } 1259 1260 /* 1261 * All this code is so that we know where we are when we start up 1262 * on a different machine with pmake. 1263 * Overriding getcwd() with $PWD totally breaks MAKEOBJDIRPREFIX 1264 * since the value of curdir can vary depending on how we got 1265 * here. Ie sitting at a shell prompt (shell that provides $PWD) 1266 * or via subdir.mk in which case its likely a shell which does 1267 * not provide it. 1268 * So, to stop it breaking this case only, we ignore PWD if 1269 * MAKEOBJDIRPREFIX is set or MAKEOBJDIR contains a transform. 1270 */ 1271 #ifndef NO_PWD_OVERRIDE 1272 if (!ignorePWD) { 1273 char *pwd, *ptmp1 = NULL, *ptmp2 = NULL; 1274 1275 if ((pwd = getenv("PWD")) != NULL && 1276 Var_Value("MAKEOBJDIRPREFIX", VAR_CMD, &ptmp1) == NULL) { 1277 const char *makeobjdir = Var_Value("MAKEOBJDIR", 1278 VAR_CMD, &ptmp2); 1279 1280 if (makeobjdir == NULL || !strchr(makeobjdir, '$')) { 1281 if (stat(pwd, &sb) == 0 && 1282 sa.st_ino == sb.st_ino && 1283 sa.st_dev == sb.st_dev) 1284 (void)strncpy(curdir, pwd, MAXPATHLEN); 1285 } 1286 } 1287 bmake_free(ptmp1); 1288 bmake_free(ptmp2); 1289 } 1290 #endif 1291 Var_Set(".CURDIR", curdir, VAR_GLOBAL); 1292 1293 /* 1294 * Find the .OBJDIR. If MAKEOBJDIRPREFIX, or failing that, 1295 * MAKEOBJDIR is set in the environment, try only that value 1296 * and fall back to .CURDIR if it does not exist. 1297 * 1298 * Otherwise, try _PATH_OBJDIR.MACHINE-MACHINE_ARCH, _PATH_OBJDIR.MACHINE, 1299 * and * finally _PATH_OBJDIRPREFIX`pwd`, in that order. If none 1300 * of these paths exist, just use .CURDIR. 1301 */ 1302 Dir_InitDir(curdir); 1303 (void)Main_SetObjdir("%s", curdir); 1304 1305 if (!Main_SetVarObjdir("MAKEOBJDIRPREFIX", curdir) && 1306 !Main_SetVarObjdir("MAKEOBJDIR", "") && 1307 !Main_SetObjdir("%s.%s-%s", _PATH_OBJDIR, machine, machine_arch) && 1308 !Main_SetObjdir("%s.%s", _PATH_OBJDIR, machine) && 1309 !Main_SetObjdir("%s", _PATH_OBJDIR)) 1310 (void)Main_SetObjdir("%s%s", _PATH_OBJDIRPREFIX, curdir); 1311 1312 /* 1313 * Initialize archive, target and suffix modules in preparation for 1314 * parsing the makefile(s) 1315 */ 1316 Arch_Init(); 1317 Targ_Init(); 1318 Suff_Init(); 1319 Trace_Init(tracefile); 1320 1321 DEFAULT = NULL; 1322 (void)time(&now); 1323 1324 Trace_Log(MAKESTART, NULL); 1325 1326 InitVarTargets(); 1327 1328 /* 1329 * If no user-supplied system path was given (through the -m option) 1330 * add the directories from the DEFSYSPATH (more than one may be given 1331 * as dir1:...:dirn) to the system include path. 1332 */ 1333 /* XXX: mismatch: the -m option sets sysIncPath, not syspath */ 1334 if (syspath == NULL || syspath[0] == '\0') 1335 syspath = defsyspath; 1336 else 1337 syspath = bmake_strdup(syspath); 1338 1339 for (start = syspath; *start != '\0'; start = cp) { 1340 for (cp = start; *cp != '\0' && *cp != ':'; cp++) 1341 continue; 1342 if (*cp == ':') { 1343 *cp++ = '\0'; 1344 } 1345 /* look for magic parent directory search string */ 1346 if (strncmp(".../", start, 4) != 0) { 1347 (void)Dir_AddDir(defIncPath, start); 1348 } else { 1349 char *dir = Dir_FindHereOrAbove(curdir, start + 4); 1350 if (dir != NULL) { 1351 (void)Dir_AddDir(defIncPath, dir); 1352 free(dir); 1353 } 1354 } 1355 } 1356 if (syspath != defsyspath) 1357 free(syspath); 1358 1359 /* 1360 * Read in the built-in rules first, followed by the specified 1361 * makefiles, or the default makefile and Makefile, in that order, 1362 * if no makefiles were given on the command line. 1363 */ 1364 if (!noBuiltins) { 1365 StringListNode *ln; 1366 1367 sysMkPath = Lst_Init(); 1368 Dir_Expand(_PATH_DEFSYSMK, 1369 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath, 1370 sysMkPath); 1371 if (Lst_IsEmpty(sysMkPath)) 1372 Fatal("%s: no system rules (%s).", progname, 1373 _PATH_DEFSYSMK); 1374 ln = Lst_Find(sysMkPath, ReadMakefileSucceeded, NULL); 1375 if (ln == NULL) 1376 Fatal("%s: cannot open %s.", progname, 1377 (char *)LstNode_Datum(Lst_First(sysMkPath))); 1378 } 1379 1380 if (!Lst_IsEmpty(makefiles)) { 1381 StringListNode *ln; 1382 1383 ln = Lst_Find(makefiles, ReadMakefileFailed, NULL); 1384 if (ln != NULL) 1385 Fatal("%s: cannot open %s.", progname, 1386 (char *)LstNode_Datum(ln)); 1387 } else { 1388 (void)Var_Subst("${" MAKEFILE_PREFERENCE "}", 1389 VAR_CMD, VARE_WANTRES, &p1); 1390 /* TODO: handle errors */ 1391 (void)str2Lst_Append(makefiles, p1, NULL); 1392 (void)Lst_Find(makefiles, ReadMakefileSucceeded, NULL); 1393 free(p1); 1394 } 1395 1396 /* In particular suppress .depend for '-r -V .OBJDIR -f /dev/null' */ 1397 if (!noBuiltins || !printVars) { 1398 (void)Var_Subst("${.MAKE.DEPENDFILE:T}", 1399 VAR_CMD, VARE_WANTRES, &makeDependfile); 1400 /* TODO: handle errors */ 1401 doing_depend = TRUE; 1402 (void)ReadMakefile(makeDependfile); 1403 doing_depend = FALSE; 1404 } 1405 1406 if (enterFlagObj) 1407 printf("%s: Entering directory `%s'\n", progname, objdir); 1408 1409 MakeMode(NULL); 1410 1411 Var_Append("MFLAGS", Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1), VAR_GLOBAL); 1412 bmake_free(p1); 1413 1414 if (!forceJobs && !compatMake && 1415 Var_Exists(".MAKE.JOBS", VAR_GLOBAL)) { 1416 char *value; 1417 int n; 1418 1419 (void)Var_Subst("${.MAKE.JOBS}", VAR_GLOBAL, VARE_WANTRES, &value); 1420 /* TODO: handle errors */ 1421 n = (int)strtol(value, NULL, 0); 1422 if (n < 1) { 1423 (void)fprintf(stderr, "%s: illegal value for .MAKE.JOBS -- must be positive integer!\n", 1424 progname); 1425 exit(1); 1426 } 1427 if (n != maxJobs) { 1428 Var_Append(MAKEFLAGS, "-j", VAR_GLOBAL); 1429 Var_Append(MAKEFLAGS, value, VAR_GLOBAL); 1430 } 1431 maxJobs = n; 1432 maxJobTokens = maxJobs; 1433 forceJobs = TRUE; 1434 free(value); 1435 } 1436 1437 /* 1438 * Be compatible if user did not specify -j and did not explicitly 1439 * turned compatibility on 1440 */ 1441 if (!compatMake && !forceJobs) { 1442 compatMake = TRUE; 1443 } 1444 1445 if (!compatMake) 1446 Job_ServerStart(maxJobTokens, jp_0, jp_1); 1447 DEBUG5(JOB, "job_pipe %d %d, maxjobs %d, tokens %d, compat %d\n", 1448 jp_0, jp_1, maxJobs, maxJobTokens, compatMake ? 1 : 0); 1449 1450 if (!printVars) 1451 Main_ExportMAKEFLAGS(TRUE); /* initial export */ 1452 1453 1454 /* 1455 * For compatibility, look at the directories in the VPATH variable 1456 * and add them to the search path, if the variable is defined. The 1457 * variable's value is in the same format as the PATH envariable, i.e. 1458 * <directory>:<directory>:<directory>... 1459 */ 1460 if (Var_Exists("VPATH", VAR_CMD)) { 1461 char *vpath, savec; 1462 /* 1463 * GCC stores string constants in read-only memory, but 1464 * Var_Subst will want to write this thing, so store it 1465 * in an array 1466 */ 1467 static char VPATH[] = "${VPATH}"; 1468 1469 (void)Var_Subst(VPATH, VAR_CMD, VARE_WANTRES, &vpath); 1470 /* TODO: handle errors */ 1471 path = vpath; 1472 do { 1473 /* skip to end of directory */ 1474 for (cp = path; *cp != ':' && *cp != '\0'; cp++) 1475 continue; 1476 /* Save terminator character so know when to stop */ 1477 savec = *cp; 1478 *cp = '\0'; 1479 /* Add directory to search path */ 1480 (void)Dir_AddDir(dirSearchPath, path); 1481 *cp = savec; 1482 path = cp + 1; 1483 } while (savec == ':'); 1484 free(vpath); 1485 } 1486 1487 /* 1488 * Now that all search paths have been read for suffixes et al, it's 1489 * time to add the default search path to their lists... 1490 */ 1491 Suff_DoPaths(); 1492 1493 /* 1494 * Propagate attributes through :: dependency lists. 1495 */ 1496 Targ_Propagate(); 1497 1498 /* print the initial graph, if the user requested it */ 1499 if (DEBUG(GRAPH1)) 1500 Targ_PrintGraph(1); 1501 1502 /* print the values of any variables requested by the user */ 1503 if (printVars) { 1504 doPrintVars(); 1505 outOfDate = FALSE; 1506 } else { 1507 outOfDate = runTargets(); 1508 } 1509 1510 #ifdef CLEANUP 1511 Lst_Free(variables); 1512 Lst_Free(makefiles); 1513 Lst_Destroy(create, free); 1514 #endif 1515 1516 /* print the graph now it's been processed if the user requested it */ 1517 if (DEBUG(GRAPH2)) 1518 Targ_PrintGraph(2); 1519 1520 Trace_Log(MAKEEND, 0); 1521 1522 if (enterFlagObj) 1523 printf("%s: Leaving directory `%s'\n", progname, objdir); 1524 if (enterFlag) 1525 printf("%s: Leaving directory `%s'\n", progname, curdir); 1526 1527 #ifdef USE_META 1528 meta_finish(); 1529 #endif 1530 Suff_End(); 1531 Targ_End(); 1532 Arch_End(); 1533 Var_End(); 1534 Parse_End(); 1535 Dir_End(); 1536 Job_End(); 1537 Trace_End(); 1538 1539 return outOfDate ? 1 : 0; 1540 } 1541 1542 /* Open and parse the given makefile, with all its side effects. 1543 * 1544 * Results: 1545 * 0 if ok. -1 if couldn't open file. 1546 */ 1547 static int 1548 ReadMakefile(const char *fname) 1549 { 1550 int fd; 1551 char *name, *path = NULL; 1552 1553 if (!strcmp(fname, "-")) { 1554 Parse_File(NULL /*stdin*/, -1); 1555 Var_Set("MAKEFILE", "", VAR_INTERNAL); 1556 } else { 1557 /* if we've chdir'd, rebuild the path name */ 1558 if (strcmp(curdir, objdir) && *fname != '/') { 1559 path = str_concat3(curdir, "/", fname); 1560 fd = open(path, O_RDONLY); 1561 if (fd != -1) { 1562 fname = path; 1563 goto found; 1564 } 1565 free(path); 1566 1567 /* If curdir failed, try objdir (ala .depend) */ 1568 path = str_concat3(objdir, "/", fname); 1569 fd = open(path, O_RDONLY); 1570 if (fd != -1) { 1571 fname = path; 1572 goto found; 1573 } 1574 } else { 1575 fd = open(fname, O_RDONLY); 1576 if (fd != -1) 1577 goto found; 1578 } 1579 /* look in -I and system include directories. */ 1580 name = Dir_FindFile(fname, parseIncPath); 1581 if (!name) 1582 name = Dir_FindFile(fname, 1583 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath); 1584 if (!name || (fd = open(name, O_RDONLY)) == -1) { 1585 free(name); 1586 free(path); 1587 return -1; 1588 } 1589 fname = name; 1590 /* 1591 * set the MAKEFILE variable desired by System V fans -- the 1592 * placement of the setting here means it gets set to the last 1593 * makefile specified, as it is set by SysV make. 1594 */ 1595 found: 1596 if (!doing_depend) 1597 Var_Set("MAKEFILE", fname, VAR_INTERNAL); 1598 Parse_File(fname, fd); 1599 } 1600 free(path); 1601 return 0; 1602 } 1603 1604 1605 1606 /*- 1607 * Cmd_Exec -- 1608 * Execute the command in cmd, and return the output of that command 1609 * in a string. In the output, newlines are replaced with spaces. 1610 * 1611 * Results: 1612 * A string containing the output of the command, or the empty string. 1613 * *errfmt returns a format string describing the command failure, 1614 * if any, using a single %s conversion specification. 1615 * 1616 * Side Effects: 1617 * The string must be freed by the caller. 1618 */ 1619 char * 1620 Cmd_Exec(const char *cmd, const char **errfmt) 1621 { 1622 const char *args[4]; /* Args for invoking the shell */ 1623 int fds[2]; /* Pipe streams */ 1624 int cpid; /* Child PID */ 1625 int pid; /* PID from wait() */ 1626 int status; /* command exit status */ 1627 Buffer buf; /* buffer to store the result */ 1628 ssize_t bytes_read; 1629 char *res; /* result */ 1630 size_t res_len; 1631 char *cp; 1632 int savederr; /* saved errno */ 1633 1634 *errfmt = NULL; 1635 1636 if (!shellName) 1637 Shell_Init(); 1638 /* 1639 * Set up arguments for shell 1640 */ 1641 args[0] = shellName; 1642 args[1] = "-c"; 1643 args[2] = cmd; 1644 args[3] = NULL; 1645 1646 /* 1647 * Open a pipe for fetching its output 1648 */ 1649 if (pipe(fds) == -1) { 1650 *errfmt = "Couldn't create pipe for \"%s\""; 1651 goto bad; 1652 } 1653 1654 /* 1655 * Fork 1656 */ 1657 switch (cpid = vFork()) { 1658 case 0: 1659 /* 1660 * Close input side of pipe 1661 */ 1662 (void)close(fds[0]); 1663 1664 /* 1665 * Duplicate the output stream to the shell's output, then 1666 * shut the extra thing down. Note we don't fetch the error 1667 * stream...why not? Why? 1668 */ 1669 (void)dup2(fds[1], 1); 1670 (void)close(fds[1]); 1671 1672 Var_ExportVars(); 1673 1674 (void)execv(shellPath, UNCONST(args)); 1675 _exit(1); 1676 /*NOTREACHED*/ 1677 1678 case -1: 1679 *errfmt = "Couldn't exec \"%s\""; 1680 goto bad; 1681 1682 default: 1683 /* 1684 * No need for the writing half 1685 */ 1686 (void)close(fds[1]); 1687 1688 savederr = 0; 1689 Buf_Init(&buf, 0); 1690 1691 do { 1692 char result[BUFSIZ]; 1693 bytes_read = read(fds[0], result, sizeof(result)); 1694 if (bytes_read > 0) 1695 Buf_AddBytes(&buf, result, (size_t)bytes_read); 1696 } 1697 while (bytes_read > 0 || (bytes_read == -1 && errno == EINTR)); 1698 if (bytes_read == -1) 1699 savederr = errno; 1700 1701 /* 1702 * Close the input side of the pipe. 1703 */ 1704 (void)close(fds[0]); 1705 1706 /* 1707 * Wait for the process to exit. 1708 */ 1709 while(((pid = waitpid(cpid, &status, 0)) != cpid) && (pid >= 0)) { 1710 JobReapChild(pid, status, FALSE); 1711 continue; 1712 } 1713 res_len = Buf_Len(&buf); 1714 res = Buf_Destroy(&buf, FALSE); 1715 1716 if (savederr != 0) 1717 *errfmt = "Couldn't read shell's output for \"%s\""; 1718 1719 if (WIFSIGNALED(status)) 1720 *errfmt = "\"%s\" exited on a signal"; 1721 else if (WEXITSTATUS(status) != 0) 1722 *errfmt = "\"%s\" returned non-zero status"; 1723 1724 /* Convert newlines to spaces. A final newline is just stripped */ 1725 if (res_len > 0 && res[res_len - 1] == '\n') 1726 res[res_len - 1] = '\0'; 1727 for (cp = res; *cp != '\0'; cp++) 1728 if (*cp == '\n') 1729 *cp = ' '; 1730 break; 1731 } 1732 return res; 1733 bad: 1734 return bmake_strdup(""); 1735 } 1736 1737 /* Print a printf-style error message. 1738 * 1739 * This error message has no consequences, in particular it does not affect 1740 * the exit status. */ 1741 void 1742 Error(const char *fmt, ...) 1743 { 1744 va_list ap; 1745 FILE *err_file; 1746 1747 err_file = debug_file; 1748 if (err_file == stdout) 1749 err_file = stderr; 1750 (void)fflush(stdout); 1751 for (;;) { 1752 va_start(ap, fmt); 1753 fprintf(err_file, "%s: ", progname); 1754 (void)vfprintf(err_file, fmt, ap); 1755 va_end(ap); 1756 (void)fprintf(err_file, "\n"); 1757 (void)fflush(err_file); 1758 if (err_file == stderr) 1759 break; 1760 err_file = stderr; 1761 } 1762 } 1763 1764 /* Produce a Fatal error message, then exit immediately. 1765 * 1766 * If jobs are running, waits for them to finish. */ 1767 void 1768 Fatal(const char *fmt, ...) 1769 { 1770 va_list ap; 1771 1772 va_start(ap, fmt); 1773 if (jobsRunning) 1774 Job_Wait(); 1775 1776 (void)fflush(stdout); 1777 (void)vfprintf(stderr, fmt, ap); 1778 va_end(ap); 1779 (void)fprintf(stderr, "\n"); 1780 (void)fflush(stderr); 1781 1782 PrintOnError(NULL, NULL); 1783 1784 if (DEBUG(GRAPH2) || DEBUG(GRAPH3)) 1785 Targ_PrintGraph(2); 1786 Trace_Log(MAKEERROR, 0); 1787 exit(2); /* Not 1 so -q can distinguish error */ 1788 } 1789 1790 /* 1791 * Punt -- 1792 * Major exception once jobs are being created. Kills all jobs, prints 1793 * a message and exits. 1794 * 1795 * Results: 1796 * None 1797 * 1798 * Side Effects: 1799 * All children are killed indiscriminately and the program Lib_Exits 1800 */ 1801 void 1802 Punt(const char *fmt, ...) 1803 { 1804 va_list ap; 1805 1806 va_start(ap, fmt); 1807 (void)fflush(stdout); 1808 (void)fprintf(stderr, "%s: ", progname); 1809 (void)vfprintf(stderr, fmt, ap); 1810 va_end(ap); 1811 (void)fprintf(stderr, "\n"); 1812 (void)fflush(stderr); 1813 1814 PrintOnError(NULL, NULL); 1815 1816 DieHorribly(); 1817 } 1818 1819 /*- 1820 * DieHorribly -- 1821 * Exit without giving a message. 1822 * 1823 * Results: 1824 * None 1825 * 1826 * Side Effects: 1827 * A big one... 1828 */ 1829 void 1830 DieHorribly(void) 1831 { 1832 if (jobsRunning) 1833 Job_AbortAll(); 1834 if (DEBUG(GRAPH2)) 1835 Targ_PrintGraph(2); 1836 Trace_Log(MAKEERROR, 0); 1837 exit(2); /* Not 1, so -q can distinguish error */ 1838 } 1839 1840 /* 1841 * Finish -- 1842 * Called when aborting due to errors in child shell to signal 1843 * abnormal exit. 1844 * 1845 * Results: 1846 * None 1847 * 1848 * Side Effects: 1849 * The program exits 1850 */ 1851 void 1852 Finish(int errors) 1853 /* number of errors encountered in Make_Make */ 1854 { 1855 if (dieQuietly(NULL, -1)) 1856 exit(2); 1857 Fatal("%d error%s", errors, errors == 1 ? "" : "s"); 1858 } 1859 1860 /* 1861 * eunlink -- 1862 * Remove a file carefully, avoiding directories. 1863 */ 1864 int 1865 eunlink(const char *file) 1866 { 1867 struct stat st; 1868 1869 if (lstat(file, &st) == -1) 1870 return -1; 1871 1872 if (S_ISDIR(st.st_mode)) { 1873 errno = EISDIR; 1874 return -1; 1875 } 1876 return unlink(file); 1877 } 1878 1879 /* 1880 * execError -- 1881 * Print why exec failed, avoiding stdio. 1882 */ 1883 void 1884 execError(const char *af, const char *av) 1885 { 1886 #ifdef USE_IOVEC 1887 int i = 0; 1888 struct iovec iov[8]; 1889 #define IOADD(s) \ 1890 (void)(iov[i].iov_base = UNCONST(s), \ 1891 iov[i].iov_len = strlen(iov[i].iov_base), \ 1892 i++) 1893 #else 1894 #define IOADD(void)write(2, s, strlen(s)) 1895 #endif 1896 1897 IOADD(progname); 1898 IOADD(": "); 1899 IOADD(af); 1900 IOADD("("); 1901 IOADD(av); 1902 IOADD(") failed ("); 1903 IOADD(strerror(errno)); 1904 IOADD(")\n"); 1905 1906 #ifdef USE_IOVEC 1907 while (writev(2, iov, 8) == -1 && errno == EAGAIN) 1908 continue; 1909 #endif 1910 } 1911 1912 /* 1913 * usage -- 1914 * exit with usage message 1915 */ 1916 static void 1917 usage(void) 1918 { 1919 char *p; 1920 if ((p = strchr(progname, '[')) != NULL) 1921 *p = '\0'; 1922 1923 (void)fprintf(stderr, 1924 "usage: %s [-BeikNnqrstWwX] \n" 1925 " [-C directory] [-D variable] [-d flags] [-f makefile]\n" 1926 " [-I directory] [-J private] [-j max_jobs] [-m directory] [-T file]\n" 1927 " [-V variable] [-v variable] [variable=value] [target ...]\n", 1928 progname); 1929 exit(2); 1930 } 1931 1932 /* 1933 * realpath(3) can get expensive, cache results... 1934 */ 1935 static GNode *cached_realpaths = NULL; 1936 1937 static GNode * 1938 get_cached_realpaths(void) 1939 { 1940 1941 if (!cached_realpaths) { 1942 cached_realpaths = Targ_NewGN("Realpath"); 1943 #ifndef DEBUG_REALPATH_CACHE 1944 cached_realpaths->flags = INTERNAL; 1945 #endif 1946 } 1947 1948 return cached_realpaths; 1949 } 1950 1951 /* purge any relative paths */ 1952 static void 1953 purge_cached_realpaths(void) 1954 { 1955 GNode *cache = get_cached_realpaths(); 1956 Hash_Entry *he, *nhe; 1957 Hash_Search hs; 1958 1959 he = Hash_EnumFirst(&cache->context, &hs); 1960 while (he) { 1961 nhe = Hash_EnumNext(&hs); 1962 if (he->name[0] != '/') { 1963 if (DEBUG(DIR)) 1964 fprintf(stderr, "cached_realpath: purging %s\n", he->name); 1965 Hash_DeleteEntry(&cache->context, he); 1966 } 1967 he = nhe; 1968 } 1969 } 1970 1971 char * 1972 cached_realpath(const char *pathname, char *resolved) 1973 { 1974 GNode *cache; 1975 const char *rp; 1976 char *cp; 1977 1978 if (!pathname || !pathname[0]) 1979 return NULL; 1980 1981 cache = get_cached_realpaths(); 1982 1983 if ((rp = Var_Value(pathname, cache, &cp)) != NULL) { 1984 /* a hit */ 1985 strncpy(resolved, rp, MAXPATHLEN); 1986 resolved[MAXPATHLEN - 1] = '\0'; 1987 } else if ((rp = realpath(pathname, resolved)) != NULL) { 1988 Var_Set(pathname, rp, cache); 1989 } /* else should we negative-cache? */ 1990 1991 bmake_free(cp); 1992 return rp ? resolved : NULL; 1993 } 1994 1995 1996 static int 1997 addErrorCMD(void *cmdp, void *gnp) 1998 { 1999 if (cmdp == NULL) 2000 return 1; /* stop */ 2001 Var_Append(".ERROR_CMD", cmdp, VAR_GLOBAL); 2002 return 0; 2003 } 2004 2005 /* 2006 * Return true if we should die without noise. 2007 * For example our failing child was a sub-make 2008 * or failure happend elsewhere. 2009 */ 2010 int 2011 dieQuietly(GNode *gn, int bf) 2012 { 2013 static int quietly = -1; 2014 2015 if (quietly < 0) { 2016 if (DEBUG(JOB) || getBoolean(".MAKE.DIE_QUIETLY", 1) == 0) 2017 quietly = 0; 2018 else if (bf >= 0) 2019 quietly = bf; 2020 else 2021 quietly = (gn) ? ((gn->type & (OP_MAKE)) != 0) : 0; 2022 } 2023 return quietly; 2024 } 2025 2026 void 2027 PrintOnError(GNode *gn, const char *s) 2028 { 2029 static GNode *en = NULL; 2030 const char *expr; 2031 char *cp; 2032 2033 if (DEBUG(HASH)) { 2034 Targ_Stats(); 2035 Var_Stats(); 2036 } 2037 2038 /* we generally want to keep quiet if a sub-make died */ 2039 if (dieQuietly(gn, -1)) 2040 return; 2041 2042 if (s) 2043 printf("%s", s); 2044 2045 printf("\n%s: stopped in %s\n", progname, curdir); 2046 2047 if (en) 2048 return; /* we've been here! */ 2049 if (gn) { 2050 /* 2051 * We can print this even if there is no .ERROR target. 2052 */ 2053 Var_Set(".ERROR_TARGET", gn->name, VAR_GLOBAL); 2054 Var_Delete(".ERROR_CMD", VAR_GLOBAL); 2055 Lst_ForEachUntil(gn->commands, addErrorCMD, gn); 2056 } 2057 expr = "${MAKE_PRINT_VAR_ON_ERROR:@v@$v='${$v}'\n@}"; 2058 (void)Var_Subst(expr, VAR_GLOBAL, VARE_WANTRES, &cp); 2059 /* TODO: handle errors */ 2060 printf("%s", cp); 2061 free(cp); 2062 fflush(stdout); 2063 2064 /* 2065 * Finally, see if there is a .ERROR target, and run it if so. 2066 */ 2067 en = Targ_FindNode(".ERROR"); 2068 if (en) { 2069 en->type |= OP_SPECIAL; 2070 Compat_Make(en, en); 2071 } 2072 } 2073 2074 void 2075 Main_ExportMAKEFLAGS(Boolean first) 2076 { 2077 static Boolean once = TRUE; 2078 const char *expr; 2079 char *s; 2080 2081 if (once != first) 2082 return; 2083 once = FALSE; 2084 2085 expr = "${.MAKEFLAGS} ${.MAKEOVERRIDES:O:u:@v@$v=${$v:Q}@}"; 2086 (void)Var_Subst(expr, VAR_CMD, VARE_WANTRES, &s); 2087 /* TODO: handle errors */ 2088 if (s[0] != '\0') { 2089 #ifdef POSIX 2090 setenv("MAKEFLAGS", s, 1); 2091 #else 2092 setenv("MAKE", s, 1); 2093 #endif 2094 } 2095 } 2096 2097 char * 2098 getTmpdir(void) 2099 { 2100 static char *tmpdir = NULL; 2101 2102 if (!tmpdir) { 2103 struct stat st; 2104 2105 /* 2106 * Honor $TMPDIR but only if it is valid. 2107 * Ensure it ends with /. 2108 */ 2109 (void)Var_Subst("${TMPDIR:tA:U" _PATH_TMP "}/", VAR_GLOBAL, 2110 VARE_WANTRES, &tmpdir); 2111 /* TODO: handle errors */ 2112 if (stat(tmpdir, &st) < 0 || !S_ISDIR(st.st_mode)) { 2113 free(tmpdir); 2114 tmpdir = bmake_strdup(_PATH_TMP); 2115 } 2116 } 2117 return tmpdir; 2118 } 2119 2120 /* 2121 * Create and open a temp file using "pattern". 2122 * If "fnamep" is provided set it to a copy of the filename created. 2123 * Otherwise unlink the file once open. 2124 */ 2125 int 2126 mkTempFile(const char *pattern, char **fnamep) 2127 { 2128 static char *tmpdir = NULL; 2129 char tfile[MAXPATHLEN]; 2130 int fd; 2131 2132 if (!pattern) 2133 pattern = TMPPAT; 2134 if (!tmpdir) 2135 tmpdir = getTmpdir(); 2136 if (pattern[0] == '/') { 2137 snprintf(tfile, sizeof(tfile), "%s", pattern); 2138 } else { 2139 snprintf(tfile, sizeof(tfile), "%s%s", tmpdir, pattern); 2140 } 2141 if ((fd = mkstemp(tfile)) < 0) 2142 Punt("Could not create temporary file %s: %s", tfile, strerror(errno)); 2143 if (fnamep) { 2144 *fnamep = bmake_strdup(tfile); 2145 } else { 2146 unlink(tfile); /* we just want the descriptor */ 2147 } 2148 return fd; 2149 } 2150 2151 /* 2152 * Convert a string representation of a boolean. 2153 * Anything that looks like "No", "False", "Off", "0" etc, 2154 * is FALSE, otherwise TRUE. 2155 */ 2156 Boolean 2157 s2Boolean(const char *s, Boolean bf) 2158 { 2159 if (s) { 2160 switch(*s) { 2161 case '\0': /* not set - the default wins */ 2162 break; 2163 case '0': 2164 case 'F': 2165 case 'f': 2166 case 'N': 2167 case 'n': 2168 bf = FALSE; 2169 break; 2170 case 'O': 2171 case 'o': 2172 switch (s[1]) { 2173 case 'F': 2174 case 'f': 2175 bf = FALSE; 2176 break; 2177 default: 2178 bf = TRUE; 2179 break; 2180 } 2181 break; 2182 default: 2183 bf = TRUE; 2184 break; 2185 } 2186 } 2187 return bf; 2188 } 2189 2190 /* 2191 * Return a Boolean based on setting of a knob. 2192 * 2193 * If the knob is not set, the supplied default is the return value. 2194 * If set, anything that looks or smells like "No", "False", "Off", "0" etc, 2195 * is FALSE, otherwise TRUE. 2196 */ 2197 Boolean 2198 getBoolean(const char *name, Boolean fallback) 2199 { 2200 char *expr = str_concat3("${", name, ":U:tl}"); 2201 char *value; 2202 Boolean res; 2203 2204 (void)Var_Subst(expr, VAR_GLOBAL, VARE_WANTRES, &value); 2205 /* TODO: handle errors */ 2206 res = s2Boolean(value, fallback); 2207 free(value); 2208 free(expr); 2209 return res; 2210 } 2211
Indexes created Tue Sep 23 20:09:58 GMT 2025