main.c revision 1.366
1 /* $NetBSD: main.c,v 1.366 2020/10/04 19:36:32 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 1.366 2020/10/04 19:36:32 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 = 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 char found_path[MAXPATHLEN + 1]; 463 464 /* look for magic parent directory search string */ 465 if (strncmp(".../", argvalue, 4) == 0) { 466 if (!Dir_FindHereOrAbove(curdir, argvalue + 4, 467 found_path, sizeof(found_path))) 468 return; 469 (void)Dir_AddDir(sysIncPath, found_path); 470 } else { 471 (void)Dir_AddDir(sysIncPath, argvalue); 472 } 473 Var_Append(MAKEFLAGS, "-m", VAR_GLOBAL); 474 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 475 } 476 477 static Boolean 478 MainParseArg(char c, const char *argvalue) 479 { 480 switch (c) { 481 case '\0': 482 break; 483 case 'B': 484 compatMake = TRUE; 485 Var_Append(MAKEFLAGS, "-B", VAR_GLOBAL); 486 Var_Set(MAKE_MODE, "compat", VAR_GLOBAL); 487 break; 488 case 'C': 489 MainParseArgChdir(argvalue); 490 break; 491 case 'D': 492 if (argvalue[0] == '\0') return FALSE; 493 Var_Set(argvalue, "1", VAR_GLOBAL); 494 Var_Append(MAKEFLAGS, "-D", VAR_GLOBAL); 495 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 496 break; 497 case 'I': 498 Parse_AddIncludeDir(argvalue); 499 Var_Append(MAKEFLAGS, "-I", VAR_GLOBAL); 500 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 501 break; 502 case 'J': 503 MainParseArgJobsInternal(argvalue); 504 break; 505 case 'N': 506 noExecute = TRUE; 507 noRecursiveExecute = TRUE; 508 Var_Append(MAKEFLAGS, "-N", VAR_GLOBAL); 509 break; 510 case 'S': 511 keepgoing = FALSE; 512 Var_Append(MAKEFLAGS, "-S", VAR_GLOBAL); 513 break; 514 case 'T': 515 tracefile = bmake_strdup(argvalue); 516 Var_Append(MAKEFLAGS, "-T", VAR_GLOBAL); 517 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 518 break; 519 case 'V': 520 case 'v': 521 printVars = c == 'v' ? EXPAND_VARS : COMPAT_VARS; 522 Lst_Append(variables, bmake_strdup(argvalue)); 523 Var_Append(MAKEFLAGS, "-V", VAR_GLOBAL); 524 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 525 break; 526 case 'W': 527 parseWarnFatal = TRUE; 528 break; 529 case 'X': 530 varNoExportEnv = TRUE; 531 Var_Append(MAKEFLAGS, "-X", VAR_GLOBAL); 532 break; 533 case 'd': 534 /* If '-d-opts' don't pass to children */ 535 if (argvalue[0] == '-') 536 argvalue++; 537 else { 538 Var_Append(MAKEFLAGS, "-d", VAR_GLOBAL); 539 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 540 } 541 parse_debug_options(argvalue); 542 break; 543 case 'e': 544 checkEnvFirst = TRUE; 545 Var_Append(MAKEFLAGS, "-e", VAR_GLOBAL); 546 break; 547 case 'f': 548 Lst_Append(makefiles, bmake_strdup(argvalue)); 549 break; 550 case 'i': 551 ignoreErrors = TRUE; 552 Var_Append(MAKEFLAGS, "-i", VAR_GLOBAL); 553 break; 554 case 'j': 555 MainParseArgJobs(argvalue); 556 break; 557 case 'k': 558 keepgoing = TRUE; 559 Var_Append(MAKEFLAGS, "-k", VAR_GLOBAL); 560 break; 561 case 'm': 562 MainParseArgSysInc(argvalue); 563 break; 564 case 'n': 565 noExecute = TRUE; 566 Var_Append(MAKEFLAGS, "-n", VAR_GLOBAL); 567 break; 568 case 'q': 569 queryFlag = TRUE; 570 /* Kind of nonsensical, wot? */ 571 Var_Append(MAKEFLAGS, "-q", VAR_GLOBAL); 572 break; 573 case 'r': 574 noBuiltins = TRUE; 575 Var_Append(MAKEFLAGS, "-r", VAR_GLOBAL); 576 break; 577 case 's': 578 beSilent = TRUE; 579 Var_Append(MAKEFLAGS, "-s", VAR_GLOBAL); 580 break; 581 case 't': 582 touchFlag = TRUE; 583 Var_Append(MAKEFLAGS, "-t", VAR_GLOBAL); 584 break; 585 case 'w': 586 enterFlag = TRUE; 587 Var_Append(MAKEFLAGS, "-w", VAR_GLOBAL); 588 break; 589 default: 590 case '?': 591 usage(); 592 } 593 return TRUE; 594 } 595 596 /* Parse the given arguments. Called from main() and from 597 * Main_ParseArgLine() when the .MAKEFLAGS target is used. 598 * 599 * The arguments must be treated as read-only and will be freed after the 600 * call. 601 * 602 * XXX: Deal with command line overriding .MAKEFLAGS in makefile */ 603 static void 604 MainParseArgs(int argc, char **argv) 605 { 606 char c; 607 int arginc; 608 char *argvalue; 609 char *optscan; 610 Boolean inOption, dashDash = FALSE; 611 612 const char *optspecs = "BC:D:I:J:NST:V:WXd:ef:ij:km:nqrstv:w"; 613 /* Can't actually use getopt(3) because rescanning is not portable */ 614 615 rearg: 616 inOption = FALSE; 617 optscan = NULL; 618 while (argc > 1) { 619 const char *optspec; 620 if (!inOption) 621 optscan = argv[1]; 622 c = *optscan++; 623 arginc = 0; 624 if (inOption) { 625 if (c == '\0') { 626 ++argv; 627 --argc; 628 inOption = FALSE; 629 continue; 630 } 631 } else { 632 if (c != '-' || dashDash) 633 break; 634 inOption = TRUE; 635 c = *optscan++; 636 } 637 /* '-' found at some earlier point */ 638 optspec = strchr(optspecs, c); 639 if (c != '\0' && optspec != NULL && optspec[1] == ':') { 640 /* -<something> found, and <something> should have an arg */ 641 inOption = FALSE; 642 arginc = 1; 643 argvalue = optscan; 644 if (*argvalue == '\0') { 645 if (argc < 3) 646 goto noarg; 647 argvalue = argv[2]; 648 arginc = 2; 649 } 650 } else { 651 argvalue = NULL; 652 } 653 switch (c) { 654 case '\0': 655 arginc = 1; 656 inOption = FALSE; 657 break; 658 case '-': 659 dashDash = TRUE; 660 break; 661 default: 662 if (!MainParseArg(c, argvalue)) 663 goto noarg; 664 } 665 argv += arginc; 666 argc -= arginc; 667 } 668 669 oldVars = TRUE; 670 671 /* 672 * See if the rest of the arguments are variable assignments and 673 * perform them if so. Else take them to be targets and stuff them 674 * on the end of the "create" list. 675 */ 676 for (; argc > 1; ++argv, --argc) { 677 VarAssign var; 678 if (Parse_IsVar(argv[1], &var)) { 679 Parse_DoVar(&var, VAR_CMD); 680 } else { 681 if (!*argv[1]) 682 Punt("illegal (null) argument."); 683 if (*argv[1] == '-' && !dashDash) 684 goto rearg; 685 Lst_Append(create, bmake_strdup(argv[1])); 686 } 687 } 688 689 return; 690 noarg: 691 (void)fprintf(stderr, "%s: option requires an argument -- %c\n", 692 progname, c); 693 usage(); 694 } 695 696 /* Break a line of arguments into words and parse them. 697 * 698 * Used when a .MFLAGS or .MAKEFLAGS target is encountered during parsing and 699 * by main() when reading the MAKEFLAGS environment variable. */ 700 void 701 Main_ParseArgLine(const char *line) 702 { 703 Words words; 704 char *p1; 705 const char *argv0 = Var_Value(".MAKE", VAR_GLOBAL, &p1); 706 char *buf; 707 708 if (line == NULL) 709 return; 710 for (; *line == ' '; ++line) 711 continue; 712 if (!*line) 713 return; 714 715 buf = str_concat3(argv0, " ", line); 716 free(p1); 717 718 words = Str_Words(buf, TRUE); 719 if (words.words == NULL) { 720 Error("Unterminated quoted string [%s]", buf); 721 free(buf); 722 return; 723 } 724 free(buf); 725 MainParseArgs((int)words.len, words.words); 726 727 Words_Free(words); 728 } 729 730 Boolean 731 Main_SetObjdir(const char *fmt, ...) 732 { 733 struct stat sb; 734 char *path; 735 char buf[MAXPATHLEN + 1]; 736 char buf2[MAXPATHLEN + 1]; 737 Boolean rc = FALSE; 738 va_list ap; 739 740 va_start(ap, fmt); 741 vsnprintf(path = buf, MAXPATHLEN, fmt, ap); 742 va_end(ap); 743 744 if (path[0] != '/') { 745 snprintf(buf2, MAXPATHLEN, "%s/%s", curdir, path); 746 path = buf2; 747 } 748 749 /* look for the directory and try to chdir there */ 750 if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) { 751 if (chdir(path)) { 752 (void)fprintf(stderr, "make warning: %s: %s.\n", 753 path, strerror(errno)); 754 } else { 755 snprintf(objdir, sizeof objdir, "%s", path); 756 Var_Set(".OBJDIR", objdir, VAR_GLOBAL); 757 setenv("PWD", objdir, 1); 758 Dir_InitDot(); 759 purge_cached_realpaths(); 760 rc = TRUE; 761 if (enterFlag && strcmp(objdir, curdir) != 0) 762 enterFlagObj = TRUE; 763 } 764 } 765 766 return rc; 767 } 768 769 static Boolean 770 Main_SetVarObjdir(const char *var, const char *suffix) 771 { 772 char *path_freeIt; 773 const char *path = Var_Value(var, VAR_CMD, &path_freeIt); 774 const char *xpath; 775 char *xpath_freeIt; 776 777 if (path == NULL || path[0] == '\0') { 778 bmake_free(path_freeIt); 779 return FALSE; 780 } 781 782 /* expand variable substitutions */ 783 xpath = path; 784 xpath_freeIt = NULL; 785 if (strchr(path, '$') != 0) { 786 (void)Var_Subst(path, VAR_GLOBAL, VARE_WANTRES, &xpath_freeIt); 787 /* TODO: handle errors */ 788 xpath = xpath_freeIt; 789 } 790 791 (void)Main_SetObjdir("%s%s", xpath, suffix); 792 793 bmake_free(xpath_freeIt); 794 bmake_free(path_freeIt); 795 return TRUE; 796 } 797 798 /* Read and parse the makefile. 799 * Return TRUE if reading the makefile succeeded, for Lst_Find. */ 800 static Boolean 801 ReadMakefileSucceeded(const void *fname, const void *unused) 802 { 803 return ReadMakefile(fname) == 0; 804 } 805 806 /* Read and parse the makefile. 807 * Return TRUE if reading the makefile failed, for Lst_Find. */ 808 static Boolean 809 ReadMakefileFailed(const void *fname, const void *unused) 810 { 811 return ReadMakefile(fname) != 0; 812 } 813 814 int 815 str2Lst_Append(StringList *lp, char *str, const char *sep) 816 { 817 char *cp; 818 int n; 819 820 if (!sep) 821 sep = " \t"; 822 823 for (n = 0, cp = strtok(str, sep); cp; cp = strtok(NULL, sep)) { 824 Lst_Append(lp, cp); 825 n++; 826 } 827 return n; 828 } 829 830 #ifdef SIGINFO 831 /*ARGSUSED*/ 832 static void 833 siginfo(int signo MAKE_ATTR_UNUSED) 834 { 835 char dir[MAXPATHLEN]; 836 char str[2 * MAXPATHLEN]; 837 int len; 838 if (getcwd(dir, sizeof(dir)) == NULL) 839 return; 840 len = snprintf(str, sizeof(str), "%s: Working in: %s\n", progname, dir); 841 if (len > 0) 842 (void)write(STDERR_FILENO, str, (size_t)len); 843 } 844 #endif 845 846 /* 847 * Allow makefiles some control over the mode we run in. 848 */ 849 void 850 MakeMode(const char *mode) 851 { 852 char *mode_freeIt = NULL; 853 854 if (mode == NULL) { 855 (void)Var_Subst("${" MAKE_MODE ":tl}", 856 VAR_GLOBAL, VARE_WANTRES, &mode_freeIt); 857 /* TODO: handle errors */ 858 mode = mode_freeIt; 859 } 860 861 if (mode[0] != '\0') { 862 if (strstr(mode, "compat")) { 863 compatMake = TRUE; 864 forceJobs = FALSE; 865 } 866 #if USE_META 867 if (strstr(mode, "meta")) 868 meta_mode_init(mode); 869 #endif 870 } 871 872 free(mode_freeIt); 873 } 874 875 static void 876 doPrintVars(void) 877 { 878 StringListNode *ln; 879 Boolean expandVars; 880 881 if (printVars == EXPAND_VARS) 882 expandVars = TRUE; 883 else if (debugVflag) 884 expandVars = FALSE; 885 else 886 expandVars = getBoolean(".MAKE.EXPAND_VARIABLES", FALSE); 887 888 for (ln = variables->first; ln != NULL; ln = ln->next) { 889 const char *var = ln->datum; 890 const char *value; 891 char *p1; 892 893 if (strchr(var, '$')) { 894 (void)Var_Subst(var, VAR_GLOBAL, VARE_WANTRES, &p1); 895 /* TODO: handle errors */ 896 value = p1; 897 } else if (expandVars) { 898 char *expr = str_concat3("${", var, "}"); 899 (void)Var_Subst(expr, VAR_GLOBAL, VARE_WANTRES, &p1); 900 /* TODO: handle errors */ 901 value = p1; 902 free(expr); 903 } else { 904 value = Var_Value(var, VAR_GLOBAL, &p1); 905 } 906 printf("%s\n", value ? value : ""); 907 bmake_free(p1); 908 } 909 } 910 911 static Boolean 912 runTargets(void) 913 { 914 GNodeList *targs; /* target nodes to create -- passed to Make_Init */ 915 Boolean outOfDate; /* FALSE if all targets up to date */ 916 917 /* 918 * Have now read the entire graph and need to make a list of 919 * targets to create. If none was given on the command line, 920 * we consult the parsing module to find the main target(s) 921 * to create. 922 */ 923 if (Lst_IsEmpty(create)) 924 targs = Parse_MainName(); 925 else 926 targs = Targ_FindList(create); 927 928 if (!compatMake) { 929 /* 930 * Initialize job module before traversing the graph 931 * now that any .BEGIN and .END targets have been read. 932 * This is done only if the -q flag wasn't given 933 * (to prevent the .BEGIN from being executed should 934 * it exist). 935 */ 936 if (!queryFlag) { 937 Job_Init(); 938 jobsRunning = TRUE; 939 } 940 941 /* Traverse the graph, checking on all the targets */ 942 outOfDate = Make_Run(targs); 943 } else { 944 /* 945 * Compat_Init will take care of creating all the 946 * targets as well as initializing the module. 947 */ 948 Compat_Run(targs); 949 outOfDate = FALSE; 950 } 951 Lst_Free(targs); 952 return outOfDate; 953 } 954 955 /* 956 * Set up the .TARGETS variable to contain the list of targets to be 957 * created. If none specified, make the variable empty -- the parser 958 * will fill the thing in with the default or .MAIN target. 959 */ 960 static void 961 InitVarTargets(void) 962 { 963 StringListNode *ln; 964 965 if (Lst_IsEmpty(create)) { 966 Var_Set(".TARGETS", "", VAR_GLOBAL); 967 return; 968 } 969 970 for (ln = create->first; ln != NULL; ln = ln->next) { 971 char *name = ln->datum; 972 Var_Append(".TARGETS", name, VAR_GLOBAL); 973 } 974 } 975 976 /*- 977 * main -- 978 * The main function, for obvious reasons. Initializes variables 979 * and a few modules, then parses the arguments give it in the 980 * environment and on the command line. Reads the system makefile 981 * followed by either Makefile, makefile or the file given by the 982 * -f argument. Sets the .MAKEFLAGS PMake variable based on all the 983 * flags it has received by then uses either the Make or the Compat 984 * module to create the initial list of targets. 985 * 986 * Results: 987 * If -q was given, exits -1 if anything was out-of-date. Else it exits 988 * 0. 989 * 990 * Side Effects: 991 * The program exits when done. Targets are created. etc. etc. etc. 992 */ 993 int 994 main(int argc, char **argv) 995 { 996 Boolean outOfDate; /* FALSE if all targets up to date */ 997 struct stat sb, sa; 998 char *p1, *path; 999 char mdpath[MAXPATHLEN]; 1000 const char *machine = getenv("MACHINE"); 1001 const char *machine_arch = getenv("MACHINE_ARCH"); 1002 char *syspath = getenv("MAKESYSPATH"); 1003 StringList *sysMkPath; /* Path of sys.mk */ 1004 char *cp = NULL, *start; 1005 /* avoid faults on read-only strings */ 1006 static char defsyspath[] = _PATH_DEFSYSPATH; 1007 char found_path[MAXPATHLEN + 1]; /* for searching for sys.mk */ 1008 struct timeval rightnow; /* to initialize random seed */ 1009 struct utsname utsname; 1010 1011 /* default to writing debug to stderr */ 1012 debug_file = stderr; 1013 1014 #ifdef SIGINFO 1015 (void)bmake_signal(SIGINFO, siginfo); 1016 #endif 1017 /* 1018 * Set the seed to produce a different random sequence 1019 * on each program execution. 1020 */ 1021 gettimeofday(&rightnow, NULL); 1022 srandom(rightnow.tv_sec + rightnow.tv_usec); 1023 1024 if ((progname = strrchr(argv[0], '/')) != NULL) 1025 progname++; 1026 else 1027 progname = argv[0]; 1028 #if defined(MAKE_NATIVE) || (defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE)) 1029 /* 1030 * get rid of resource limit on file descriptors 1031 */ 1032 { 1033 struct rlimit rl; 1034 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 && 1035 rl.rlim_cur != rl.rlim_max) { 1036 rl.rlim_cur = rl.rlim_max; 1037 (void)setrlimit(RLIMIT_NOFILE, &rl); 1038 } 1039 } 1040 #endif 1041 1042 if (uname(&utsname) == -1) { 1043 (void)fprintf(stderr, "%s: uname failed (%s).\n", progname, 1044 strerror(errno)); 1045 exit(2); 1046 } 1047 1048 /* 1049 * Get the name of this type of MACHINE from utsname 1050 * so we can share an executable for similar machines. 1051 * (i.e. m68k: amiga hp300, mac68k, sun3, ...) 1052 * 1053 * Note that both MACHINE and MACHINE_ARCH are decided at 1054 * run-time. 1055 */ 1056 if (!machine) { 1057 #ifdef MAKE_NATIVE 1058 machine = utsname.machine; 1059 #else 1060 #ifdef MAKE_MACHINE 1061 machine = MAKE_MACHINE; 1062 #else 1063 machine = "unknown"; 1064 #endif 1065 #endif 1066 } 1067 1068 if (!machine_arch) { 1069 #ifdef MAKE_NATIVE 1070 static char machine_arch_buf[sizeof(utsname.machine)]; 1071 const int mib[2] = { CTL_HW, HW_MACHINE_ARCH }; 1072 size_t len = sizeof(machine_arch_buf); 1073 1074 if (sysctl(mib, __arraycount(mib), machine_arch_buf, 1075 &len, NULL, 0) < 0) { 1076 (void)fprintf(stderr, "%s: sysctl failed (%s).\n", progname, 1077 strerror(errno)); 1078 exit(2); 1079 } 1080 1081 machine_arch = machine_arch_buf; 1082 #else 1083 #ifndef MACHINE_ARCH 1084 #ifdef MAKE_MACHINE_ARCH 1085 machine_arch = MAKE_MACHINE_ARCH; 1086 #else 1087 machine_arch = "unknown"; 1088 #endif 1089 #else 1090 machine_arch = MACHINE_ARCH; 1091 #endif 1092 #endif 1093 } 1094 1095 myPid = getpid(); /* remember this for vFork() */ 1096 1097 /* 1098 * Just in case MAKEOBJDIR wants us to do something tricky. 1099 */ 1100 Var_Init(); /* Initialize the lists of variables for 1101 * parsing arguments */ 1102 Var_Set(".MAKE.OS", utsname.sysname, VAR_GLOBAL); 1103 Var_Set("MACHINE", machine, VAR_GLOBAL); 1104 Var_Set("MACHINE_ARCH", machine_arch, VAR_GLOBAL); 1105 #ifdef MAKE_VERSION 1106 Var_Set("MAKE_VERSION", MAKE_VERSION, VAR_GLOBAL); 1107 #endif 1108 Var_Set(".newline", "\n", VAR_GLOBAL); /* handy for :@ loops */ 1109 /* 1110 * This is the traditional preference for makefiles. 1111 */ 1112 #ifndef MAKEFILE_PREFERENCE_LIST 1113 # define MAKEFILE_PREFERENCE_LIST "makefile Makefile" 1114 #endif 1115 Var_Set(MAKEFILE_PREFERENCE, MAKEFILE_PREFERENCE_LIST, 1116 VAR_GLOBAL); 1117 Var_Set(MAKE_DEPENDFILE, ".depend", VAR_GLOBAL); 1118 1119 create = Lst_Init(); 1120 makefiles = Lst_Init(); 1121 printVars = 0; 1122 debugVflag = FALSE; 1123 variables = Lst_Init(); 1124 beSilent = FALSE; /* Print commands as executed */ 1125 ignoreErrors = FALSE; /* Pay attention to non-zero returns */ 1126 noExecute = FALSE; /* Execute all commands */ 1127 noRecursiveExecute = FALSE; /* Execute all .MAKE targets */ 1128 keepgoing = FALSE; /* Stop on error */ 1129 allPrecious = FALSE; /* Remove targets when interrupted */ 1130 deleteOnError = FALSE; /* Historical default behavior */ 1131 queryFlag = FALSE; /* This is not just a check-run */ 1132 noBuiltins = FALSE; /* Read the built-in rules */ 1133 touchFlag = FALSE; /* Actually update targets */ 1134 debug = 0; /* No debug verbosity, please. */ 1135 jobsRunning = FALSE; 1136 1137 maxJobs = DEFMAXLOCAL; /* Set default local max concurrency */ 1138 maxJobTokens = maxJobs; 1139 compatMake = FALSE; /* No compat mode */ 1140 ignorePWD = FALSE; 1141 1142 /* 1143 * Initialize the parsing, directory and variable modules to prepare 1144 * for the reading of inclusion paths and variable settings on the 1145 * command line 1146 */ 1147 1148 /* 1149 * Initialize various variables. 1150 * MAKE also gets this name, for compatibility 1151 * .MAKEFLAGS gets set to the empty string just in case. 1152 * MFLAGS also gets initialized empty, for compatibility. 1153 */ 1154 Parse_Init(); 1155 if (argv[0][0] == '/' || strchr(argv[0], '/') == NULL) { 1156 /* 1157 * Leave alone if it is an absolute path, or if it does 1158 * not contain a '/' in which case we need to find it in 1159 * the path, like execvp(3) and the shells do. 1160 */ 1161 p1 = argv[0]; 1162 } else { 1163 /* 1164 * A relative path, canonicalize it. 1165 */ 1166 p1 = cached_realpath(argv[0], mdpath); 1167 if (!p1 || *p1 != '/' || stat(p1, &sb) < 0) { 1168 p1 = argv[0]; /* realpath failed */ 1169 } 1170 } 1171 Var_Set("MAKE", p1, VAR_GLOBAL); 1172 Var_Set(".MAKE", p1, VAR_GLOBAL); 1173 Var_Set(MAKEFLAGS, "", VAR_GLOBAL); 1174 Var_Set(MAKEOVERRIDES, "", VAR_GLOBAL); 1175 Var_Set("MFLAGS", "", VAR_GLOBAL); 1176 Var_Set(".ALLTARGETS", "", VAR_GLOBAL); 1177 /* some makefiles need to know this */ 1178 Var_Set(MAKE_LEVEL ".ENV", MAKE_LEVEL_ENV, VAR_CMD); 1179 1180 /* 1181 * Set some other useful macros 1182 */ 1183 { 1184 char tmp[64], *ep; 1185 1186 makelevel = ((ep = getenv(MAKE_LEVEL_ENV)) && *ep) ? atoi(ep) : 0; 1187 if (makelevel < 0) 1188 makelevel = 0; 1189 snprintf(tmp, sizeof(tmp), "%d", makelevel); 1190 Var_Set(MAKE_LEVEL, tmp, VAR_GLOBAL); 1191 snprintf(tmp, sizeof(tmp), "%u", myPid); 1192 Var_Set(".MAKE.PID", tmp, VAR_GLOBAL); 1193 snprintf(tmp, sizeof(tmp), "%u", getppid()); 1194 Var_Set(".MAKE.PPID", tmp, VAR_GLOBAL); 1195 } 1196 if (makelevel > 0) { 1197 char pn[1024]; 1198 snprintf(pn, sizeof(pn), "%s[%d]", progname, makelevel); 1199 progname = bmake_strdup(pn); 1200 } 1201 1202 #ifdef USE_META 1203 meta_init(); 1204 #endif 1205 Dir_Init(); 1206 1207 /* 1208 * First snag any flags out of the MAKE environment variable. 1209 * (Note this is *not* MAKEFLAGS since /bin/make uses that and it's 1210 * in a different format). 1211 */ 1212 #ifdef POSIX 1213 p1 = explode(getenv("MAKEFLAGS")); 1214 Main_ParseArgLine(p1); 1215 free(p1); 1216 #else 1217 Main_ParseArgLine(getenv("MAKE")); 1218 #endif 1219 1220 /* 1221 * Find where we are (now). 1222 * We take care of PWD for the automounter below... 1223 */ 1224 if (getcwd(curdir, MAXPATHLEN) == NULL) { 1225 (void)fprintf(stderr, "%s: getcwd: %s.\n", 1226 progname, strerror(errno)); 1227 exit(2); 1228 } 1229 1230 MainParseArgs(argc, argv); 1231 1232 if (enterFlag) 1233 printf("%s: Entering directory `%s'\n", progname, curdir); 1234 1235 /* 1236 * Verify that cwd is sane. 1237 */ 1238 if (stat(curdir, &sa) == -1) { 1239 (void)fprintf(stderr, "%s: %s: %s.\n", 1240 progname, curdir, strerror(errno)); 1241 exit(2); 1242 } 1243 1244 /* 1245 * All this code is so that we know where we are when we start up 1246 * on a different machine with pmake. 1247 * Overriding getcwd() with $PWD totally breaks MAKEOBJDIRPREFIX 1248 * since the value of curdir can vary depending on how we got 1249 * here. Ie sitting at a shell prompt (shell that provides $PWD) 1250 * or via subdir.mk in which case its likely a shell which does 1251 * not provide it. 1252 * So, to stop it breaking this case only, we ignore PWD if 1253 * MAKEOBJDIRPREFIX is set or MAKEOBJDIR contains a transform. 1254 */ 1255 #ifndef NO_PWD_OVERRIDE 1256 if (!ignorePWD) { 1257 char *pwd, *ptmp1 = NULL, *ptmp2 = NULL; 1258 1259 if ((pwd = getenv("PWD")) != NULL && 1260 Var_Value("MAKEOBJDIRPREFIX", VAR_CMD, &ptmp1) == NULL) { 1261 const char *makeobjdir = Var_Value("MAKEOBJDIR", 1262 VAR_CMD, &ptmp2); 1263 1264 if (makeobjdir == NULL || !strchr(makeobjdir, '$')) { 1265 if (stat(pwd, &sb) == 0 && 1266 sa.st_ino == sb.st_ino && 1267 sa.st_dev == sb.st_dev) 1268 (void)strncpy(curdir, pwd, MAXPATHLEN); 1269 } 1270 } 1271 bmake_free(ptmp1); 1272 bmake_free(ptmp2); 1273 } 1274 #endif 1275 Var_Set(".CURDIR", curdir, VAR_GLOBAL); 1276 1277 /* 1278 * Find the .OBJDIR. If MAKEOBJDIRPREFIX, or failing that, 1279 * MAKEOBJDIR is set in the environment, try only that value 1280 * and fall back to .CURDIR if it does not exist. 1281 * 1282 * Otherwise, try _PATH_OBJDIR.MACHINE-MACHINE_ARCH, _PATH_OBJDIR.MACHINE, 1283 * and * finally _PATH_OBJDIRPREFIX`pwd`, in that order. If none 1284 * of these paths exist, just use .CURDIR. 1285 */ 1286 Dir_InitDir(curdir); 1287 (void)Main_SetObjdir("%s", curdir); 1288 1289 if (!Main_SetVarObjdir("MAKEOBJDIRPREFIX", curdir) && 1290 !Main_SetVarObjdir("MAKEOBJDIR", "") && 1291 !Main_SetObjdir("%s.%s-%s", _PATH_OBJDIR, machine, machine_arch) && 1292 !Main_SetObjdir("%s.%s", _PATH_OBJDIR, machine) && 1293 !Main_SetObjdir("%s", _PATH_OBJDIR)) 1294 (void)Main_SetObjdir("%s%s", _PATH_OBJDIRPREFIX, curdir); 1295 1296 /* 1297 * Initialize archive, target and suffix modules in preparation for 1298 * parsing the makefile(s) 1299 */ 1300 Arch_Init(); 1301 Targ_Init(); 1302 Suff_Init(); 1303 Trace_Init(tracefile); 1304 1305 DEFAULT = NULL; 1306 (void)time(&now); 1307 1308 Trace_Log(MAKESTART, NULL); 1309 1310 InitVarTargets(); 1311 1312 /* 1313 * If no user-supplied system path was given (through the -m option) 1314 * add the directories from the DEFSYSPATH (more than one may be given 1315 * as dir1:...:dirn) to the system include path. 1316 */ 1317 /* XXX: mismatch: the -m option sets sysIncPath, not syspath */ 1318 if (syspath == NULL || syspath[0] == '\0') 1319 syspath = defsyspath; 1320 else 1321 syspath = bmake_strdup(syspath); 1322 1323 for (start = syspath; *start != '\0'; start = cp) { 1324 for (cp = start; *cp != '\0' && *cp != ':'; cp++) 1325 continue; 1326 if (*cp == ':') { 1327 *cp++ = '\0'; 1328 } 1329 /* look for magic parent directory search string */ 1330 if (strncmp(".../", start, 4) != 0) { 1331 (void)Dir_AddDir(defIncPath, start); 1332 } else { 1333 if (Dir_FindHereOrAbove(curdir, start+4, 1334 found_path, sizeof(found_path))) { 1335 (void)Dir_AddDir(defIncPath, found_path); 1336 } 1337 } 1338 } 1339 if (syspath != defsyspath) 1340 free(syspath); 1341 1342 /* 1343 * Read in the built-in rules first, followed by the specified 1344 * makefiles, or the default makefile and Makefile, in that order, 1345 * if no makefiles were given on the command line. 1346 */ 1347 if (!noBuiltins) { 1348 StringListNode *ln; 1349 1350 sysMkPath = Lst_Init(); 1351 Dir_Expand(_PATH_DEFSYSMK, 1352 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath, 1353 sysMkPath); 1354 if (Lst_IsEmpty(sysMkPath)) 1355 Fatal("%s: no system rules (%s).", progname, 1356 _PATH_DEFSYSMK); 1357 ln = Lst_Find(sysMkPath, ReadMakefileSucceeded, NULL); 1358 if (ln == NULL) 1359 Fatal("%s: cannot open %s.", progname, 1360 (char *)LstNode_Datum(Lst_First(sysMkPath))); 1361 } 1362 1363 if (!Lst_IsEmpty(makefiles)) { 1364 StringListNode *ln; 1365 1366 ln = Lst_Find(makefiles, ReadMakefileFailed, NULL); 1367 if (ln != NULL) 1368 Fatal("%s: cannot open %s.", progname, 1369 (char *)LstNode_Datum(ln)); 1370 } else { 1371 (void)Var_Subst("${" MAKEFILE_PREFERENCE "}", 1372 VAR_CMD, VARE_WANTRES, &p1); 1373 /* TODO: handle errors */ 1374 (void)str2Lst_Append(makefiles, p1, NULL); 1375 (void)Lst_Find(makefiles, ReadMakefileSucceeded, NULL); 1376 free(p1); 1377 } 1378 1379 /* In particular suppress .depend for '-r -V .OBJDIR -f /dev/null' */ 1380 if (!noBuiltins || !printVars) { 1381 (void)Var_Subst("${.MAKE.DEPENDFILE:T}", 1382 VAR_CMD, VARE_WANTRES, &makeDependfile); 1383 /* TODO: handle errors */ 1384 doing_depend = TRUE; 1385 (void)ReadMakefile(makeDependfile); 1386 doing_depend = FALSE; 1387 } 1388 1389 if (enterFlagObj) 1390 printf("%s: Entering directory `%s'\n", progname, objdir); 1391 1392 MakeMode(NULL); 1393 1394 Var_Append("MFLAGS", Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1), VAR_GLOBAL); 1395 bmake_free(p1); 1396 1397 if (!forceJobs && !compatMake && 1398 Var_Exists(".MAKE.JOBS", VAR_GLOBAL)) { 1399 char *value; 1400 int n; 1401 1402 (void)Var_Subst("${.MAKE.JOBS}", VAR_GLOBAL, VARE_WANTRES, &value); 1403 /* TODO: handle errors */ 1404 n = strtol(value, NULL, 0); 1405 if (n < 1) { 1406 (void)fprintf(stderr, "%s: illegal value for .MAKE.JOBS -- must be positive integer!\n", 1407 progname); 1408 exit(1); 1409 } 1410 if (n != maxJobs) { 1411 Var_Append(MAKEFLAGS, "-j", VAR_GLOBAL); 1412 Var_Append(MAKEFLAGS, value, VAR_GLOBAL); 1413 } 1414 maxJobs = n; 1415 maxJobTokens = maxJobs; 1416 forceJobs = TRUE; 1417 free(value); 1418 } 1419 1420 /* 1421 * Be compatible if user did not specify -j and did not explicitly 1422 * turned compatibility on 1423 */ 1424 if (!compatMake && !forceJobs) { 1425 compatMake = TRUE; 1426 } 1427 1428 if (!compatMake) 1429 Job_ServerStart(maxJobTokens, jp_0, jp_1); 1430 DEBUG5(JOB, "job_pipe %d %d, maxjobs %d, tokens %d, compat %d\n", 1431 jp_0, jp_1, maxJobs, maxJobTokens, compatMake ? 1 : 0); 1432 1433 if (!printVars) 1434 Main_ExportMAKEFLAGS(TRUE); /* initial export */ 1435 1436 1437 /* 1438 * For compatibility, look at the directories in the VPATH variable 1439 * and add them to the search path, if the variable is defined. The 1440 * variable's value is in the same format as the PATH envariable, i.e. 1441 * <directory>:<directory>:<directory>... 1442 */ 1443 if (Var_Exists("VPATH", VAR_CMD)) { 1444 char *vpath, savec; 1445 /* 1446 * GCC stores string constants in read-only memory, but 1447 * Var_Subst will want to write this thing, so store it 1448 * in an array 1449 */ 1450 static char VPATH[] = "${VPATH}"; 1451 1452 (void)Var_Subst(VPATH, VAR_CMD, VARE_WANTRES, &vpath); 1453 /* TODO: handle errors */ 1454 path = vpath; 1455 do { 1456 /* skip to end of directory */ 1457 for (cp = path; *cp != ':' && *cp != '\0'; cp++) 1458 continue; 1459 /* Save terminator character so know when to stop */ 1460 savec = *cp; 1461 *cp = '\0'; 1462 /* Add directory to search path */ 1463 (void)Dir_AddDir(dirSearchPath, path); 1464 *cp = savec; 1465 path = cp + 1; 1466 } while (savec == ':'); 1467 free(vpath); 1468 } 1469 1470 /* 1471 * Now that all search paths have been read for suffixes et al, it's 1472 * time to add the default search path to their lists... 1473 */ 1474 Suff_DoPaths(); 1475 1476 /* 1477 * Propagate attributes through :: dependency lists. 1478 */ 1479 Targ_Propagate(); 1480 1481 /* print the initial graph, if the user requested it */ 1482 if (DEBUG(GRAPH1)) 1483 Targ_PrintGraph(1); 1484 1485 /* print the values of any variables requested by the user */ 1486 if (printVars) { 1487 doPrintVars(); 1488 outOfDate = FALSE; 1489 } else { 1490 outOfDate = runTargets(); 1491 } 1492 1493 #ifdef CLEANUP 1494 Lst_Free(variables); 1495 Lst_Free(makefiles); 1496 Lst_Destroy(create, free); 1497 #endif 1498 1499 /* print the graph now it's been processed if the user requested it */ 1500 if (DEBUG(GRAPH2)) 1501 Targ_PrintGraph(2); 1502 1503 Trace_Log(MAKEEND, 0); 1504 1505 if (enterFlagObj) 1506 printf("%s: Leaving directory `%s'\n", progname, objdir); 1507 if (enterFlag) 1508 printf("%s: Leaving directory `%s'\n", progname, curdir); 1509 1510 #ifdef USE_META 1511 meta_finish(); 1512 #endif 1513 Suff_End(); 1514 Targ_End(); 1515 Arch_End(); 1516 Var_End(); 1517 Parse_End(); 1518 Dir_End(); 1519 Job_End(); 1520 Trace_End(); 1521 1522 return outOfDate ? 1 : 0; 1523 } 1524 1525 /* Open and parse the given makefile, with all its side effects. 1526 * 1527 * Results: 1528 * 0 if ok. -1 if couldn't open file. 1529 */ 1530 static int 1531 ReadMakefile(const char *fname) 1532 { 1533 int fd; 1534 char *name, *path = NULL; 1535 1536 if (!strcmp(fname, "-")) { 1537 Parse_File(NULL /*stdin*/, -1); 1538 Var_Set("MAKEFILE", "", VAR_INTERNAL); 1539 } else { 1540 /* if we've chdir'd, rebuild the path name */ 1541 if (strcmp(curdir, objdir) && *fname != '/') { 1542 path = str_concat3(curdir, "/", fname); 1543 fd = open(path, O_RDONLY); 1544 if (fd != -1) { 1545 fname = path; 1546 goto found; 1547 } 1548 free(path); 1549 1550 /* If curdir failed, try objdir (ala .depend) */ 1551 path = str_concat3(objdir, "/", fname); 1552 fd = open(path, O_RDONLY); 1553 if (fd != -1) { 1554 fname = path; 1555 goto found; 1556 } 1557 } else { 1558 fd = open(fname, O_RDONLY); 1559 if (fd != -1) 1560 goto found; 1561 } 1562 /* look in -I and system include directories. */ 1563 name = Dir_FindFile(fname, parseIncPath); 1564 if (!name) 1565 name = Dir_FindFile(fname, 1566 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath); 1567 if (!name || (fd = open(name, O_RDONLY)) == -1) { 1568 free(name); 1569 free(path); 1570 return -1; 1571 } 1572 fname = name; 1573 /* 1574 * set the MAKEFILE variable desired by System V fans -- the 1575 * placement of the setting here means it gets set to the last 1576 * makefile specified, as it is set by SysV make. 1577 */ 1578 found: 1579 if (!doing_depend) 1580 Var_Set("MAKEFILE", fname, VAR_INTERNAL); 1581 Parse_File(fname, fd); 1582 } 1583 free(path); 1584 return 0; 1585 } 1586 1587 1588 1589 /*- 1590 * Cmd_Exec -- 1591 * Execute the command in cmd, and return the output of that command 1592 * in a string. In the output, newlines are replaced with spaces. 1593 * 1594 * Results: 1595 * A string containing the output of the command, or the empty string. 1596 * *errfmt returns a format string describing the command failure, 1597 * if any, using a single %s conversion specification. 1598 * 1599 * Side Effects: 1600 * The string must be freed by the caller. 1601 */ 1602 char * 1603 Cmd_Exec(const char *cmd, const char **errfmt) 1604 { 1605 const char *args[4]; /* Args for invoking the shell */ 1606 int fds[2]; /* Pipe streams */ 1607 int cpid; /* Child PID */ 1608 int pid; /* PID from wait() */ 1609 int status; /* command exit status */ 1610 Buffer buf; /* buffer to store the result */ 1611 ssize_t bytes_read; 1612 char *res; /* result */ 1613 size_t res_len; 1614 char *cp; 1615 int savederr; /* saved errno */ 1616 1617 *errfmt = NULL; 1618 1619 if (!shellName) 1620 Shell_Init(); 1621 /* 1622 * Set up arguments for shell 1623 */ 1624 args[0] = shellName; 1625 args[1] = "-c"; 1626 args[2] = cmd; 1627 args[3] = NULL; 1628 1629 /* 1630 * Open a pipe for fetching its output 1631 */ 1632 if (pipe(fds) == -1) { 1633 *errfmt = "Couldn't create pipe for \"%s\""; 1634 goto bad; 1635 } 1636 1637 /* 1638 * Fork 1639 */ 1640 switch (cpid = vFork()) { 1641 case 0: 1642 /* 1643 * Close input side of pipe 1644 */ 1645 (void)close(fds[0]); 1646 1647 /* 1648 * Duplicate the output stream to the shell's output, then 1649 * shut the extra thing down. Note we don't fetch the error 1650 * stream...why not? Why? 1651 */ 1652 (void)dup2(fds[1], 1); 1653 (void)close(fds[1]); 1654 1655 Var_ExportVars(); 1656 1657 (void)execv(shellPath, UNCONST(args)); 1658 _exit(1); 1659 /*NOTREACHED*/ 1660 1661 case -1: 1662 *errfmt = "Couldn't exec \"%s\""; 1663 goto bad; 1664 1665 default: 1666 /* 1667 * No need for the writing half 1668 */ 1669 (void)close(fds[1]); 1670 1671 savederr = 0; 1672 Buf_Init(&buf, 0); 1673 1674 do { 1675 char result[BUFSIZ]; 1676 bytes_read = read(fds[0], result, sizeof(result)); 1677 if (bytes_read > 0) 1678 Buf_AddBytes(&buf, result, (size_t)bytes_read); 1679 } 1680 while (bytes_read > 0 || (bytes_read == -1 && errno == EINTR)); 1681 if (bytes_read == -1) 1682 savederr = errno; 1683 1684 /* 1685 * Close the input side of the pipe. 1686 */ 1687 (void)close(fds[0]); 1688 1689 /* 1690 * Wait for the process to exit. 1691 */ 1692 while(((pid = waitpid(cpid, &status, 0)) != cpid) && (pid >= 0)) { 1693 JobReapChild(pid, status, FALSE); 1694 continue; 1695 } 1696 res_len = Buf_Len(&buf); 1697 res = Buf_Destroy(&buf, FALSE); 1698 1699 if (savederr != 0) 1700 *errfmt = "Couldn't read shell's output for \"%s\""; 1701 1702 if (WIFSIGNALED(status)) 1703 *errfmt = "\"%s\" exited on a signal"; 1704 else if (WEXITSTATUS(status) != 0) 1705 *errfmt = "\"%s\" returned non-zero status"; 1706 1707 /* Convert newlines to spaces. A final newline is just stripped */ 1708 if (res_len > 0 && res[res_len - 1] == '\n') 1709 res[res_len - 1] = '\0'; 1710 for (cp = res; *cp != '\0'; cp++) 1711 if (*cp == '\n') 1712 *cp = ' '; 1713 break; 1714 } 1715 return res; 1716 bad: 1717 return bmake_strdup(""); 1718 } 1719 1720 /* Print a printf-style error message. 1721 * 1722 * This error message has no consequences, in particular it does not affect 1723 * the exit status. */ 1724 void 1725 Error(const char *fmt, ...) 1726 { 1727 va_list ap; 1728 FILE *err_file; 1729 1730 err_file = debug_file; 1731 if (err_file == stdout) 1732 err_file = stderr; 1733 (void)fflush(stdout); 1734 for (;;) { 1735 va_start(ap, fmt); 1736 fprintf(err_file, "%s: ", progname); 1737 (void)vfprintf(err_file, fmt, ap); 1738 va_end(ap); 1739 (void)fprintf(err_file, "\n"); 1740 (void)fflush(err_file); 1741 if (err_file == stderr) 1742 break; 1743 err_file = stderr; 1744 } 1745 } 1746 1747 /* Produce a Fatal error message, then exit immediately. 1748 * 1749 * If jobs are running, waits for them to finish. */ 1750 void 1751 Fatal(const char *fmt, ...) 1752 { 1753 va_list ap; 1754 1755 va_start(ap, fmt); 1756 if (jobsRunning) 1757 Job_Wait(); 1758 1759 (void)fflush(stdout); 1760 (void)vfprintf(stderr, fmt, ap); 1761 va_end(ap); 1762 (void)fprintf(stderr, "\n"); 1763 (void)fflush(stderr); 1764 1765 PrintOnError(NULL, NULL); 1766 1767 if (DEBUG(GRAPH2) || DEBUG(GRAPH3)) 1768 Targ_PrintGraph(2); 1769 Trace_Log(MAKEERROR, 0); 1770 exit(2); /* Not 1 so -q can distinguish error */ 1771 } 1772 1773 /* 1774 * Punt -- 1775 * Major exception once jobs are being created. Kills all jobs, prints 1776 * a message and exits. 1777 * 1778 * Results: 1779 * None 1780 * 1781 * Side Effects: 1782 * All children are killed indiscriminately and the program Lib_Exits 1783 */ 1784 void 1785 Punt(const char *fmt, ...) 1786 { 1787 va_list ap; 1788 1789 va_start(ap, fmt); 1790 (void)fflush(stdout); 1791 (void)fprintf(stderr, "%s: ", progname); 1792 (void)vfprintf(stderr, fmt, ap); 1793 va_end(ap); 1794 (void)fprintf(stderr, "\n"); 1795 (void)fflush(stderr); 1796 1797 PrintOnError(NULL, NULL); 1798 1799 DieHorribly(); 1800 } 1801 1802 /*- 1803 * DieHorribly -- 1804 * Exit without giving a message. 1805 * 1806 * Results: 1807 * None 1808 * 1809 * Side Effects: 1810 * A big one... 1811 */ 1812 void 1813 DieHorribly(void) 1814 { 1815 if (jobsRunning) 1816 Job_AbortAll(); 1817 if (DEBUG(GRAPH2)) 1818 Targ_PrintGraph(2); 1819 Trace_Log(MAKEERROR, 0); 1820 exit(2); /* Not 1, so -q can distinguish error */ 1821 } 1822 1823 /* 1824 * Finish -- 1825 * Called when aborting due to errors in child shell to signal 1826 * abnormal exit. 1827 * 1828 * Results: 1829 * None 1830 * 1831 * Side Effects: 1832 * The program exits 1833 */ 1834 void 1835 Finish(int errors) 1836 /* number of errors encountered in Make_Make */ 1837 { 1838 if (dieQuietly(NULL, -1)) 1839 exit(2); 1840 Fatal("%d error%s", errors, errors == 1 ? "" : "s"); 1841 } 1842 1843 /* 1844 * eunlink -- 1845 * Remove a file carefully, avoiding directories. 1846 */ 1847 int 1848 eunlink(const char *file) 1849 { 1850 struct stat st; 1851 1852 if (lstat(file, &st) == -1) 1853 return -1; 1854 1855 if (S_ISDIR(st.st_mode)) { 1856 errno = EISDIR; 1857 return -1; 1858 } 1859 return unlink(file); 1860 } 1861 1862 /* 1863 * execError -- 1864 * Print why exec failed, avoiding stdio. 1865 */ 1866 void 1867 execError(const char *af, const char *av) 1868 { 1869 #ifdef USE_IOVEC 1870 int i = 0; 1871 struct iovec iov[8]; 1872 #define IOADD(s) \ 1873 (void)(iov[i].iov_base = UNCONST(s), \ 1874 iov[i].iov_len = strlen(iov[i].iov_base), \ 1875 i++) 1876 #else 1877 #define IOADD(void)write(2, s, strlen(s)) 1878 #endif 1879 1880 IOADD(progname); 1881 IOADD(": "); 1882 IOADD(af); 1883 IOADD("("); 1884 IOADD(av); 1885 IOADD(") failed ("); 1886 IOADD(strerror(errno)); 1887 IOADD(")\n"); 1888 1889 #ifdef USE_IOVEC 1890 while (writev(2, iov, 8) == -1 && errno == EAGAIN) 1891 continue; 1892 #endif 1893 } 1894 1895 /* 1896 * usage -- 1897 * exit with usage message 1898 */ 1899 static void 1900 usage(void) 1901 { 1902 char *p; 1903 if ((p = strchr(progname, '[')) != NULL) 1904 *p = '\0'; 1905 1906 (void)fprintf(stderr, 1907 "usage: %s [-BeikNnqrstWwX] \n" 1908 " [-C directory] [-D variable] [-d flags] [-f makefile]\n" 1909 " [-I directory] [-J private] [-j max_jobs] [-m directory] [-T file]\n" 1910 " [-V variable] [-v variable] [variable=value] [target ...]\n", 1911 progname); 1912 exit(2); 1913 } 1914 1915 /* 1916 * realpath(3) can get expensive, cache results... 1917 */ 1918 static GNode *cached_realpaths = NULL; 1919 1920 static GNode * 1921 get_cached_realpaths(void) 1922 { 1923 1924 if (!cached_realpaths) { 1925 cached_realpaths = Targ_NewGN("Realpath"); 1926 #ifndef DEBUG_REALPATH_CACHE 1927 cached_realpaths->flags = INTERNAL; 1928 #endif 1929 } 1930 1931 return cached_realpaths; 1932 } 1933 1934 /* purge any relative paths */ 1935 static void 1936 purge_cached_realpaths(void) 1937 { 1938 GNode *cache = get_cached_realpaths(); 1939 Hash_Entry *he, *nhe; 1940 Hash_Search hs; 1941 1942 he = Hash_EnumFirst(&cache->context, &hs); 1943 while (he) { 1944 nhe = Hash_EnumNext(&hs); 1945 if (he->name[0] != '/') { 1946 if (DEBUG(DIR)) 1947 fprintf(stderr, "cached_realpath: purging %s\n", he->name); 1948 Hash_DeleteEntry(&cache->context, he); 1949 } 1950 he = nhe; 1951 } 1952 } 1953 1954 char * 1955 cached_realpath(const char *pathname, char *resolved) 1956 { 1957 GNode *cache; 1958 const char *rp; 1959 char *cp; 1960 1961 if (!pathname || !pathname[0]) 1962 return NULL; 1963 1964 cache = get_cached_realpaths(); 1965 1966 if ((rp = Var_Value(pathname, cache, &cp)) != NULL) { 1967 /* a hit */ 1968 strncpy(resolved, rp, MAXPATHLEN); 1969 resolved[MAXPATHLEN - 1] = '\0'; 1970 } else if ((rp = realpath(pathname, resolved)) != NULL) { 1971 Var_Set(pathname, rp, cache); 1972 } /* else should we negative-cache? */ 1973 1974 bmake_free(cp); 1975 return rp ? resolved : NULL; 1976 } 1977 1978 1979 static int 1980 addErrorCMD(void *cmdp, void *gnp) 1981 { 1982 if (cmdp == NULL) 1983 return 1; /* stop */ 1984 Var_Append(".ERROR_CMD", cmdp, VAR_GLOBAL); 1985 return 0; 1986 } 1987 1988 /* 1989 * Return true if we should die without noise. 1990 * For example our failing child was a sub-make 1991 * or failure happend elsewhere. 1992 */ 1993 int 1994 dieQuietly(GNode *gn, int bf) 1995 { 1996 static int quietly = -1; 1997 1998 if (quietly < 0) { 1999 if (DEBUG(JOB) || getBoolean(".MAKE.DIE_QUIETLY", 1) == 0) 2000 quietly = 0; 2001 else if (bf >= 0) 2002 quietly = bf; 2003 else 2004 quietly = (gn) ? ((gn->type & (OP_MAKE)) != 0) : 0; 2005 } 2006 return quietly; 2007 } 2008 2009 void 2010 PrintOnError(GNode *gn, const char *s) 2011 { 2012 static GNode *en = NULL; 2013 const char *expr; 2014 char *cp; 2015 2016 if (DEBUG(HASH)) { 2017 Targ_Stats(); 2018 Var_Stats(); 2019 } 2020 2021 /* we generally want to keep quiet if a sub-make died */ 2022 if (dieQuietly(gn, -1)) 2023 return; 2024 2025 if (s) 2026 printf("%s", s); 2027 2028 printf("\n%s: stopped in %s\n", progname, curdir); 2029 2030 if (en) 2031 return; /* we've been here! */ 2032 if (gn) { 2033 /* 2034 * We can print this even if there is no .ERROR target. 2035 */ 2036 Var_Set(".ERROR_TARGET", gn->name, VAR_GLOBAL); 2037 Var_Delete(".ERROR_CMD", VAR_GLOBAL); 2038 Lst_ForEachUntil(gn->commands, addErrorCMD, gn); 2039 } 2040 expr = "${MAKE_PRINT_VAR_ON_ERROR:@v@$v='${$v}'\n@}"; 2041 (void)Var_Subst(expr, VAR_GLOBAL, VARE_WANTRES, &cp); 2042 /* TODO: handle errors */ 2043 printf("%s", cp); 2044 free(cp); 2045 fflush(stdout); 2046 2047 /* 2048 * Finally, see if there is a .ERROR target, and run it if so. 2049 */ 2050 en = Targ_FindNode(".ERROR"); 2051 if (en) { 2052 en->type |= OP_SPECIAL; 2053 Compat_Make(en, en); 2054 } 2055 } 2056 2057 void 2058 Main_ExportMAKEFLAGS(Boolean first) 2059 { 2060 static Boolean once = TRUE; 2061 const char *expr; 2062 char *s; 2063 2064 if (once != first) 2065 return; 2066 once = FALSE; 2067 2068 expr = "${.MAKEFLAGS} ${.MAKEOVERRIDES:O:u:@v@$v=${$v:Q}@}"; 2069 (void)Var_Subst(expr, VAR_CMD, VARE_WANTRES, &s); 2070 /* TODO: handle errors */ 2071 if (s[0] != '\0') { 2072 #ifdef POSIX 2073 setenv("MAKEFLAGS", s, 1); 2074 #else 2075 setenv("MAKE", s, 1); 2076 #endif 2077 } 2078 } 2079 2080 char * 2081 getTmpdir(void) 2082 { 2083 static char *tmpdir = NULL; 2084 2085 if (!tmpdir) { 2086 struct stat st; 2087 2088 /* 2089 * Honor $TMPDIR but only if it is valid. 2090 * Ensure it ends with /. 2091 */ 2092 (void)Var_Subst("${TMPDIR:tA:U" _PATH_TMP "}/", VAR_GLOBAL, 2093 VARE_WANTRES, &tmpdir); 2094 /* TODO: handle errors */ 2095 if (stat(tmpdir, &st) < 0 || !S_ISDIR(st.st_mode)) { 2096 free(tmpdir); 2097 tmpdir = bmake_strdup(_PATH_TMP); 2098 } 2099 } 2100 return tmpdir; 2101 } 2102 2103 /* 2104 * Create and open a temp file using "pattern". 2105 * If "fnamep" is provided set it to a copy of the filename created. 2106 * Otherwise unlink the file once open. 2107 */ 2108 int 2109 mkTempFile(const char *pattern, char **fnamep) 2110 { 2111 static char *tmpdir = NULL; 2112 char tfile[MAXPATHLEN]; 2113 int fd; 2114 2115 if (!pattern) 2116 pattern = TMPPAT; 2117 if (!tmpdir) 2118 tmpdir = getTmpdir(); 2119 if (pattern[0] == '/') { 2120 snprintf(tfile, sizeof(tfile), "%s", pattern); 2121 } else { 2122 snprintf(tfile, sizeof(tfile), "%s%s", tmpdir, pattern); 2123 } 2124 if ((fd = mkstemp(tfile)) < 0) 2125 Punt("Could not create temporary file %s: %s", tfile, strerror(errno)); 2126 if (fnamep) { 2127 *fnamep = bmake_strdup(tfile); 2128 } else { 2129 unlink(tfile); /* we just want the descriptor */ 2130 } 2131 return fd; 2132 } 2133 2134 /* 2135 * Convert a string representation of a boolean. 2136 * Anything that looks like "No", "False", "Off", "0" etc, 2137 * is FALSE, otherwise TRUE. 2138 */ 2139 Boolean 2140 s2Boolean(const char *s, Boolean bf) 2141 { 2142 if (s) { 2143 switch(*s) { 2144 case '\0': /* not set - the default wins */ 2145 break; 2146 case '0': 2147 case 'F': 2148 case 'f': 2149 case 'N': 2150 case 'n': 2151 bf = FALSE; 2152 break; 2153 case 'O': 2154 case 'o': 2155 switch (s[1]) { 2156 case 'F': 2157 case 'f': 2158 bf = FALSE; 2159 break; 2160 default: 2161 bf = TRUE; 2162 break; 2163 } 2164 break; 2165 default: 2166 bf = TRUE; 2167 break; 2168 } 2169 } 2170 return bf; 2171 } 2172 2173 /* 2174 * Return a Boolean based on setting of a knob. 2175 * 2176 * If the knob is not set, the supplied default is the return value. 2177 * If set, anything that looks or smells like "No", "False", "Off", "0" etc, 2178 * is FALSE, otherwise TRUE. 2179 */ 2180 Boolean 2181 getBoolean(const char *name, Boolean fallback) 2182 { 2183 char *expr = str_concat3("${", name, ":U:tl}"); 2184 char *value; 2185 Boolean res; 2186 2187 (void)Var_Subst(expr, VAR_GLOBAL, VARE_WANTRES, &value); 2188 /* TODO: handle errors */ 2189 res = s2Boolean(value, fallback); 2190 free(value); 2191 free(expr); 2192 return res; 2193 } 2194
Indexes created Thu Oct 23 22:10:10 GMT 2025