main.c revision 1.369
1 /* $NetBSD: main.c,v 1.369 2020/10/05 19:27:47 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 1.369 2020/10/05 19:27:47 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 = 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 static const char * 977 init_machine(const struct utsname *utsname) 978 { 979 const char *machine = getenv("MACHINE"); 980 if (machine != NULL) 981 return machine; 982 983 #ifdef MAKE_NATIVE 984 return utsname->machine; 985 #else 986 #ifdef MAKE_MACHINE 987 return MAKE_MACHINE; 988 #else 989 return "unknown"; 990 #endif 991 #endif 992 } 993 994 static const char * 995 init_machine_arch(void) 996 { 997 const char *env = getenv("MACHINE_ARCH"); 998 if (env != NULL) 999 return env; 1000 1001 #ifdef MAKE_NATIVE 1002 { 1003 struct utsname utsname; 1004 static char machine_arch_buf[sizeof(utsname.machine)]; 1005 const int mib[2] = { CTL_HW, HW_MACHINE_ARCH }; 1006 size_t len = sizeof(machine_arch_buf); 1007 1008 if (sysctl(mib, __arraycount(mib), machine_arch_buf, 1009 &len, NULL, 0) < 0) { 1010 (void)fprintf(stderr, "%s: sysctl failed (%s).\n", progname, 1011 strerror(errno)); 1012 exit(2); 1013 } 1014 1015 return machine_arch_buf; 1016 } 1017 #else 1018 #ifndef MACHINE_ARCH 1019 #ifdef MAKE_MACHINE_ARCH 1020 return MAKE_MACHINE_ARCH; 1021 #else 1022 return "unknown"; 1023 #endif 1024 #else 1025 return MACHINE_ARCH; 1026 #endif 1027 #endif 1028 } 1029 1030 /*- 1031 * main -- 1032 * The main function, for obvious reasons. Initializes variables 1033 * and a few modules, then parses the arguments give it in the 1034 * environment and on the command line. Reads the system makefile 1035 * followed by either Makefile, makefile or the file given by the 1036 * -f argument. Sets the .MAKEFLAGS PMake variable based on all the 1037 * flags it has received by then uses either the Make or the Compat 1038 * module to create the initial list of targets. 1039 * 1040 * Results: 1041 * If -q was given, exits -1 if anything was out-of-date. Else it exits 1042 * 0. 1043 * 1044 * Side Effects: 1045 * The program exits when done. Targets are created. etc. etc. etc. 1046 */ 1047 int 1048 main(int argc, char **argv) 1049 { 1050 Boolean outOfDate; /* FALSE if all targets up to date */ 1051 struct stat sb, sa; 1052 char *p1, *path; 1053 char mdpath[MAXPATHLEN]; 1054 const char *machine; 1055 const char *machine_arch; 1056 char *syspath = getenv("MAKESYSPATH"); 1057 StringList *sysMkPath; /* Path of sys.mk */ 1058 char *cp = NULL, *start; 1059 /* avoid faults on read-only strings */ 1060 static char defsyspath[] = _PATH_DEFSYSPATH; 1061 char found_path[MAXPATHLEN + 1]; /* for searching for sys.mk */ 1062 struct timeval rightnow; /* to initialize random seed */ 1063 struct utsname utsname; 1064 1065 /* default to writing debug to stderr */ 1066 debug_file = stderr; 1067 1068 #ifdef SIGINFO 1069 (void)bmake_signal(SIGINFO, siginfo); 1070 #endif 1071 /* 1072 * Set the seed to produce a different random sequence 1073 * on each program execution. 1074 */ 1075 gettimeofday(&rightnow, NULL); 1076 srandom(rightnow.tv_sec + rightnow.tv_usec); 1077 1078 if ((progname = strrchr(argv[0], '/')) != NULL) 1079 progname++; 1080 else 1081 progname = argv[0]; 1082 #if defined(MAKE_NATIVE) || (defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE)) 1083 /* 1084 * get rid of resource limit on file descriptors 1085 */ 1086 { 1087 struct rlimit rl; 1088 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 && 1089 rl.rlim_cur != rl.rlim_max) { 1090 rl.rlim_cur = rl.rlim_max; 1091 (void)setrlimit(RLIMIT_NOFILE, &rl); 1092 } 1093 } 1094 #endif 1095 1096 if (uname(&utsname) == -1) { 1097 (void)fprintf(stderr, "%s: uname failed (%s).\n", progname, 1098 strerror(errno)); 1099 exit(2); 1100 } 1101 1102 /* 1103 * Get the name of this type of MACHINE from utsname 1104 * so we can share an executable for similar machines. 1105 * (i.e. m68k: amiga hp300, mac68k, sun3, ...) 1106 * 1107 * Note that both MACHINE and MACHINE_ARCH are decided at 1108 * run-time. 1109 */ 1110 machine = init_machine(&utsname); 1111 machine_arch = init_machine_arch(); 1112 1113 myPid = getpid(); /* remember this for vFork() */ 1114 1115 /* 1116 * Just in case MAKEOBJDIR wants us to do something tricky. 1117 */ 1118 Var_Init(); /* Initialize the lists of variables for 1119 * parsing arguments */ 1120 Var_Set(".MAKE.OS", utsname.sysname, VAR_GLOBAL); 1121 Var_Set("MACHINE", machine, VAR_GLOBAL); 1122 Var_Set("MACHINE_ARCH", machine_arch, VAR_GLOBAL); 1123 #ifdef MAKE_VERSION 1124 Var_Set("MAKE_VERSION", MAKE_VERSION, VAR_GLOBAL); 1125 #endif 1126 Var_Set(".newline", "\n", VAR_GLOBAL); /* handy for :@ loops */ 1127 /* 1128 * This is the traditional preference for makefiles. 1129 */ 1130 #ifndef MAKEFILE_PREFERENCE_LIST 1131 # define MAKEFILE_PREFERENCE_LIST "makefile Makefile" 1132 #endif 1133 Var_Set(MAKEFILE_PREFERENCE, MAKEFILE_PREFERENCE_LIST, 1134 VAR_GLOBAL); 1135 Var_Set(MAKE_DEPENDFILE, ".depend", VAR_GLOBAL); 1136 1137 create = Lst_Init(); 1138 makefiles = Lst_Init(); 1139 printVars = 0; 1140 debugVflag = FALSE; 1141 variables = Lst_Init(); 1142 beSilent = FALSE; /* Print commands as executed */ 1143 ignoreErrors = FALSE; /* Pay attention to non-zero returns */ 1144 noExecute = FALSE; /* Execute all commands */ 1145 noRecursiveExecute = FALSE; /* Execute all .MAKE targets */ 1146 keepgoing = FALSE; /* Stop on error */ 1147 allPrecious = FALSE; /* Remove targets when interrupted */ 1148 deleteOnError = FALSE; /* Historical default behavior */ 1149 queryFlag = FALSE; /* This is not just a check-run */ 1150 noBuiltins = FALSE; /* Read the built-in rules */ 1151 touchFlag = FALSE; /* Actually update targets */ 1152 debug = 0; /* No debug verbosity, please. */ 1153 jobsRunning = FALSE; 1154 1155 maxJobs = DEFMAXLOCAL; /* Set default local max concurrency */ 1156 maxJobTokens = maxJobs; 1157 compatMake = FALSE; /* No compat mode */ 1158 ignorePWD = FALSE; 1159 1160 /* 1161 * Initialize the parsing, directory and variable modules to prepare 1162 * for the reading of inclusion paths and variable settings on the 1163 * command line 1164 */ 1165 1166 /* 1167 * Initialize various variables. 1168 * MAKE also gets this name, for compatibility 1169 * .MAKEFLAGS gets set to the empty string just in case. 1170 * MFLAGS also gets initialized empty, for compatibility. 1171 */ 1172 Parse_Init(); 1173 if (argv[0][0] == '/' || strchr(argv[0], '/') == NULL) { 1174 /* 1175 * Leave alone if it is an absolute path, or if it does 1176 * not contain a '/' in which case we need to find it in 1177 * the path, like execvp(3) and the shells do. 1178 */ 1179 p1 = argv[0]; 1180 } else { 1181 /* 1182 * A relative path, canonicalize it. 1183 */ 1184 p1 = cached_realpath(argv[0], mdpath); 1185 if (!p1 || *p1 != '/' || stat(p1, &sb) < 0) { 1186 p1 = argv[0]; /* realpath failed */ 1187 } 1188 } 1189 Var_Set("MAKE", p1, VAR_GLOBAL); 1190 Var_Set(".MAKE", p1, VAR_GLOBAL); 1191 Var_Set(MAKEFLAGS, "", VAR_GLOBAL); 1192 Var_Set(MAKEOVERRIDES, "", VAR_GLOBAL); 1193 Var_Set("MFLAGS", "", VAR_GLOBAL); 1194 Var_Set(".ALLTARGETS", "", VAR_GLOBAL); 1195 /* some makefiles need to know this */ 1196 Var_Set(MAKE_LEVEL ".ENV", MAKE_LEVEL_ENV, VAR_CMD); 1197 1198 /* 1199 * Set some other useful macros 1200 */ 1201 { 1202 char tmp[64], *ep; 1203 1204 makelevel = ((ep = getenv(MAKE_LEVEL_ENV)) && *ep) ? atoi(ep) : 0; 1205 if (makelevel < 0) 1206 makelevel = 0; 1207 snprintf(tmp, sizeof(tmp), "%d", makelevel); 1208 Var_Set(MAKE_LEVEL, tmp, VAR_GLOBAL); 1209 snprintf(tmp, sizeof(tmp), "%u", myPid); 1210 Var_Set(".MAKE.PID", tmp, VAR_GLOBAL); 1211 snprintf(tmp, sizeof(tmp), "%u", getppid()); 1212 Var_Set(".MAKE.PPID", tmp, VAR_GLOBAL); 1213 } 1214 if (makelevel > 0) { 1215 char pn[1024]; 1216 snprintf(pn, sizeof(pn), "%s[%d]", progname, makelevel); 1217 progname = bmake_strdup(pn); 1218 } 1219 1220 #ifdef USE_META 1221 meta_init(); 1222 #endif 1223 Dir_Init(); 1224 1225 /* 1226 * First snag any flags out of the MAKE environment variable. 1227 * (Note this is *not* MAKEFLAGS since /bin/make uses that and it's 1228 * in a different format). 1229 */ 1230 #ifdef POSIX 1231 p1 = explode(getenv("MAKEFLAGS")); 1232 Main_ParseArgLine(p1); 1233 free(p1); 1234 #else 1235 Main_ParseArgLine(getenv("MAKE")); 1236 #endif 1237 1238 /* 1239 * Find where we are (now). 1240 * We take care of PWD for the automounter below... 1241 */ 1242 if (getcwd(curdir, MAXPATHLEN) == NULL) { 1243 (void)fprintf(stderr, "%s: getcwd: %s.\n", 1244 progname, strerror(errno)); 1245 exit(2); 1246 } 1247 1248 MainParseArgs(argc, argv); 1249 1250 if (enterFlag) 1251 printf("%s: Entering directory `%s'\n", progname, curdir); 1252 1253 /* 1254 * Verify that cwd is sane. 1255 */ 1256 if (stat(curdir, &sa) == -1) { 1257 (void)fprintf(stderr, "%s: %s: %s.\n", 1258 progname, curdir, strerror(errno)); 1259 exit(2); 1260 } 1261 1262 /* 1263 * All this code is so that we know where we are when we start up 1264 * on a different machine with pmake. 1265 * Overriding getcwd() with $PWD totally breaks MAKEOBJDIRPREFIX 1266 * since the value of curdir can vary depending on how we got 1267 * here. Ie sitting at a shell prompt (shell that provides $PWD) 1268 * or via subdir.mk in which case its likely a shell which does 1269 * not provide it. 1270 * So, to stop it breaking this case only, we ignore PWD if 1271 * MAKEOBJDIRPREFIX is set or MAKEOBJDIR contains a transform. 1272 */ 1273 #ifndef NO_PWD_OVERRIDE 1274 if (!ignorePWD) { 1275 char *pwd, *ptmp1 = NULL, *ptmp2 = NULL; 1276 1277 if ((pwd = getenv("PWD")) != NULL && 1278 Var_Value("MAKEOBJDIRPREFIX", VAR_CMD, &ptmp1) == NULL) { 1279 const char *makeobjdir = Var_Value("MAKEOBJDIR", 1280 VAR_CMD, &ptmp2); 1281 1282 if (makeobjdir == NULL || !strchr(makeobjdir, '$')) { 1283 if (stat(pwd, &sb) == 0 && 1284 sa.st_ino == sb.st_ino && 1285 sa.st_dev == sb.st_dev) 1286 (void)strncpy(curdir, pwd, MAXPATHLEN); 1287 } 1288 } 1289 bmake_free(ptmp1); 1290 bmake_free(ptmp2); 1291 } 1292 #endif 1293 Var_Set(".CURDIR", curdir, VAR_GLOBAL); 1294 1295 /* 1296 * Find the .OBJDIR. If MAKEOBJDIRPREFIX, or failing that, 1297 * MAKEOBJDIR is set in the environment, try only that value 1298 * and fall back to .CURDIR if it does not exist. 1299 * 1300 * Otherwise, try _PATH_OBJDIR.MACHINE-MACHINE_ARCH, _PATH_OBJDIR.MACHINE, 1301 * and * finally _PATH_OBJDIRPREFIX`pwd`, in that order. If none 1302 * of these paths exist, just use .CURDIR. 1303 */ 1304 Dir_InitDir(curdir); 1305 (void)Main_SetObjdir("%s", curdir); 1306 1307 if (!Main_SetVarObjdir("MAKEOBJDIRPREFIX", curdir) && 1308 !Main_SetVarObjdir("MAKEOBJDIR", "") && 1309 !Main_SetObjdir("%s.%s-%s", _PATH_OBJDIR, machine, machine_arch) && 1310 !Main_SetObjdir("%s.%s", _PATH_OBJDIR, machine) && 1311 !Main_SetObjdir("%s", _PATH_OBJDIR)) 1312 (void)Main_SetObjdir("%s%s", _PATH_OBJDIRPREFIX, curdir); 1313 1314 /* 1315 * Initialize archive, target and suffix modules in preparation for 1316 * parsing the makefile(s) 1317 */ 1318 Arch_Init(); 1319 Targ_Init(); 1320 Suff_Init(); 1321 Trace_Init(tracefile); 1322 1323 DEFAULT = NULL; 1324 (void)time(&now); 1325 1326 Trace_Log(MAKESTART, NULL); 1327 1328 InitVarTargets(); 1329 1330 /* 1331 * If no user-supplied system path was given (through the -m option) 1332 * add the directories from the DEFSYSPATH (more than one may be given 1333 * as dir1:...:dirn) to the system include path. 1334 */ 1335 /* XXX: mismatch: the -m option sets sysIncPath, not syspath */ 1336 if (syspath == NULL || syspath[0] == '\0') 1337 syspath = defsyspath; 1338 else 1339 syspath = bmake_strdup(syspath); 1340 1341 for (start = syspath; *start != '\0'; start = cp) { 1342 for (cp = start; *cp != '\0' && *cp != ':'; cp++) 1343 continue; 1344 if (*cp == ':') { 1345 *cp++ = '\0'; 1346 } 1347 /* look for magic parent directory search string */ 1348 if (strncmp(".../", start, 4) != 0) { 1349 (void)Dir_AddDir(defIncPath, start); 1350 } else { 1351 if (Dir_FindHereOrAbove(curdir, start+4, 1352 found_path, sizeof(found_path))) { 1353 (void)Dir_AddDir(defIncPath, found_path); 1354 } 1355 } 1356 } 1357 if (syspath != defsyspath) 1358 free(syspath); 1359 1360 /* 1361 * Read in the built-in rules first, followed by the specified 1362 * makefiles, or the default makefile and Makefile, in that order, 1363 * if no makefiles were given on the command line. 1364 */ 1365 if (!noBuiltins) { 1366 StringListNode *ln; 1367 1368 sysMkPath = Lst_Init(); 1369 Dir_Expand(_PATH_DEFSYSMK, 1370 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath, 1371 sysMkPath); 1372 if (Lst_IsEmpty(sysMkPath)) 1373 Fatal("%s: no system rules (%s).", progname, 1374 _PATH_DEFSYSMK); 1375 ln = Lst_Find(sysMkPath, ReadMakefileSucceeded, NULL); 1376 if (ln == NULL) 1377 Fatal("%s: cannot open %s.", progname, 1378 (char *)LstNode_Datum(Lst_First(sysMkPath))); 1379 } 1380 1381 if (!Lst_IsEmpty(makefiles)) { 1382 StringListNode *ln; 1383 1384 ln = Lst_Find(makefiles, ReadMakefileFailed, NULL); 1385 if (ln != NULL) 1386 Fatal("%s: cannot open %s.", progname, 1387 (char *)LstNode_Datum(ln)); 1388 } else { 1389 (void)Var_Subst("${" MAKEFILE_PREFERENCE "}", 1390 VAR_CMD, VARE_WANTRES, &p1); 1391 /* TODO: handle errors */ 1392 (void)str2Lst_Append(makefiles, p1, NULL); 1393 (void)Lst_Find(makefiles, ReadMakefileSucceeded, NULL); 1394 free(p1); 1395 } 1396 1397 /* In particular suppress .depend for '-r -V .OBJDIR -f /dev/null' */ 1398 if (!noBuiltins || !printVars) { 1399 (void)Var_Subst("${.MAKE.DEPENDFILE:T}", 1400 VAR_CMD, VARE_WANTRES, &makeDependfile); 1401 /* TODO: handle errors */ 1402 doing_depend = TRUE; 1403 (void)ReadMakefile(makeDependfile); 1404 doing_depend = FALSE; 1405 } 1406 1407 if (enterFlagObj) 1408 printf("%s: Entering directory `%s'\n", progname, objdir); 1409 1410 MakeMode(NULL); 1411 1412 Var_Append("MFLAGS", Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1), VAR_GLOBAL); 1413 bmake_free(p1); 1414 1415 if (!forceJobs && !compatMake && 1416 Var_Exists(".MAKE.JOBS", VAR_GLOBAL)) { 1417 char *value; 1418 int n; 1419 1420 (void)Var_Subst("${.MAKE.JOBS}", VAR_GLOBAL, VARE_WANTRES, &value); 1421 /* TODO: handle errors */ 1422 n = strtol(value, NULL, 0); 1423 if (n < 1) { 1424 (void)fprintf(stderr, "%s: illegal value for .MAKE.JOBS -- must be positive integer!\n", 1425 progname); 1426 exit(1); 1427 } 1428 if (n != maxJobs) { 1429 Var_Append(MAKEFLAGS, "-j", VAR_GLOBAL); 1430 Var_Append(MAKEFLAGS, value, VAR_GLOBAL); 1431 } 1432 maxJobs = n; 1433 maxJobTokens = maxJobs; 1434 forceJobs = TRUE; 1435 free(value); 1436 } 1437 1438 /* 1439 * Be compatible if user did not specify -j and did not explicitly 1440 * turned compatibility on 1441 */ 1442 if (!compatMake && !forceJobs) { 1443 compatMake = TRUE; 1444 } 1445 1446 if (!compatMake) 1447 Job_ServerStart(maxJobTokens, jp_0, jp_1); 1448 DEBUG5(JOB, "job_pipe %d %d, maxjobs %d, tokens %d, compat %d\n", 1449 jp_0, jp_1, maxJobs, maxJobTokens, compatMake ? 1 : 0); 1450 1451 if (!printVars) 1452 Main_ExportMAKEFLAGS(TRUE); /* initial export */ 1453 1454 1455 /* 1456 * For compatibility, look at the directories in the VPATH variable 1457 * and add them to the search path, if the variable is defined. The 1458 * variable's value is in the same format as the PATH envariable, i.e. 1459 * <directory>:<directory>:<directory>... 1460 */ 1461 if (Var_Exists("VPATH", VAR_CMD)) { 1462 char *vpath, savec; 1463 /* 1464 * GCC stores string constants in read-only memory, but 1465 * Var_Subst will want to write this thing, so store it 1466 * in an array 1467 */ 1468 static char VPATH[] = "${VPATH}"; 1469 1470 (void)Var_Subst(VPATH, VAR_CMD, VARE_WANTRES, &vpath); 1471 /* TODO: handle errors */ 1472 path = vpath; 1473 do { 1474 /* skip to end of directory */ 1475 for (cp = path; *cp != ':' && *cp != '\0'; cp++) 1476 continue; 1477 /* Save terminator character so know when to stop */ 1478 savec = *cp; 1479 *cp = '\0'; 1480 /* Add directory to search path */ 1481 (void)Dir_AddDir(dirSearchPath, path); 1482 *cp = savec; 1483 path = cp + 1; 1484 } while (savec == ':'); 1485 free(vpath); 1486 } 1487 1488 /* 1489 * Now that all search paths have been read for suffixes et al, it's 1490 * time to add the default search path to their lists... 1491 */ 1492 Suff_DoPaths(); 1493 1494 /* 1495 * Propagate attributes through :: dependency lists. 1496 */ 1497 Targ_Propagate(); 1498 1499 /* print the initial graph, if the user requested it */ 1500 if (DEBUG(GRAPH1)) 1501 Targ_PrintGraph(1); 1502 1503 /* print the values of any variables requested by the user */ 1504 if (printVars) { 1505 doPrintVars(); 1506 outOfDate = FALSE; 1507 } else { 1508 outOfDate = runTargets(); 1509 } 1510 1511 #ifdef CLEANUP 1512 Lst_Free(variables); 1513 Lst_Free(makefiles); 1514 Lst_Destroy(create, free); 1515 #endif 1516 1517 /* print the graph now it's been processed if the user requested it */ 1518 if (DEBUG(GRAPH2)) 1519 Targ_PrintGraph(2); 1520 1521 Trace_Log(MAKEEND, 0); 1522 1523 if (enterFlagObj) 1524 printf("%s: Leaving directory `%s'\n", progname, objdir); 1525 if (enterFlag) 1526 printf("%s: Leaving directory `%s'\n", progname, curdir); 1527 1528 #ifdef USE_META 1529 meta_finish(); 1530 #endif 1531 Suff_End(); 1532 Targ_End(); 1533 Arch_End(); 1534 Var_End(); 1535 Parse_End(); 1536 Dir_End(); 1537 Job_End(); 1538 Trace_End(); 1539 1540 return outOfDate ? 1 : 0; 1541 } 1542 1543 /* Open and parse the given makefile, with all its side effects. 1544 * 1545 * Results: 1546 * 0 if ok. -1 if couldn't open file. 1547 */ 1548 static int 1549 ReadMakefile(const char *fname) 1550 { 1551 int fd; 1552 char *name, *path = NULL; 1553 1554 if (!strcmp(fname, "-")) { 1555 Parse_File(NULL /*stdin*/, -1); 1556 Var_Set("MAKEFILE", "", VAR_INTERNAL); 1557 } else { 1558 /* if we've chdir'd, rebuild the path name */ 1559 if (strcmp(curdir, objdir) && *fname != '/') { 1560 path = str_concat3(curdir, "/", fname); 1561 fd = open(path, O_RDONLY); 1562 if (fd != -1) { 1563 fname = path; 1564 goto found; 1565 } 1566 free(path); 1567 1568 /* If curdir failed, try objdir (ala .depend) */ 1569 path = str_concat3(objdir, "/", fname); 1570 fd = open(path, O_RDONLY); 1571 if (fd != -1) { 1572 fname = path; 1573 goto found; 1574 } 1575 } else { 1576 fd = open(fname, O_RDONLY); 1577 if (fd != -1) 1578 goto found; 1579 } 1580 /* look in -I and system include directories. */ 1581 name = Dir_FindFile(fname, parseIncPath); 1582 if (!name) 1583 name = Dir_FindFile(fname, 1584 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath); 1585 if (!name || (fd = open(name, O_RDONLY)) == -1) { 1586 free(name); 1587 free(path); 1588 return -1; 1589 } 1590 fname = name; 1591 /* 1592 * set the MAKEFILE variable desired by System V fans -- the 1593 * placement of the setting here means it gets set to the last 1594 * makefile specified, as it is set by SysV make. 1595 */ 1596 found: 1597 if (!doing_depend) 1598 Var_Set("MAKEFILE", fname, VAR_INTERNAL); 1599 Parse_File(fname, fd); 1600 } 1601 free(path); 1602 return 0; 1603 } 1604 1605 1606 1607 /*- 1608 * Cmd_Exec -- 1609 * Execute the command in cmd, and return the output of that command 1610 * in a string. In the output, newlines are replaced with spaces. 1611 * 1612 * Results: 1613 * A string containing the output of the command, or the empty string. 1614 * *errfmt returns a format string describing the command failure, 1615 * if any, using a single %s conversion specification. 1616 * 1617 * Side Effects: 1618 * The string must be freed by the caller. 1619 */ 1620 char * 1621 Cmd_Exec(const char *cmd, const char **errfmt) 1622 { 1623 const char *args[4]; /* Args for invoking the shell */ 1624 int fds[2]; /* Pipe streams */ 1625 int cpid; /* Child PID */ 1626 int pid; /* PID from wait() */ 1627 int status; /* command exit status */ 1628 Buffer buf; /* buffer to store the result */ 1629 ssize_t bytes_read; 1630 char *res; /* result */ 1631 size_t res_len; 1632 char *cp; 1633 int savederr; /* saved errno */ 1634 1635 *errfmt = NULL; 1636 1637 if (!shellName) 1638 Shell_Init(); 1639 /* 1640 * Set up arguments for shell 1641 */ 1642 args[0] = shellName; 1643 args[1] = "-c"; 1644 args[2] = cmd; 1645 args[3] = NULL; 1646 1647 /* 1648 * Open a pipe for fetching its output 1649 */ 1650 if (pipe(fds) == -1) { 1651 *errfmt = "Couldn't create pipe for \"%s\""; 1652 goto bad; 1653 } 1654 1655 /* 1656 * Fork 1657 */ 1658 switch (cpid = vFork()) { 1659 case 0: 1660 /* 1661 * Close input side of pipe 1662 */ 1663 (void)close(fds[0]); 1664 1665 /* 1666 * Duplicate the output stream to the shell's output, then 1667 * shut the extra thing down. Note we don't fetch the error 1668 * stream...why not? Why? 1669 */ 1670 (void)dup2(fds[1], 1); 1671 (void)close(fds[1]); 1672 1673 Var_ExportVars(); 1674 1675 (void)execv(shellPath, UNCONST(args)); 1676 _exit(1); 1677 /*NOTREACHED*/ 1678 1679 case -1: 1680 *errfmt = "Couldn't exec \"%s\""; 1681 goto bad; 1682 1683 default: 1684 /* 1685 * No need for the writing half 1686 */ 1687 (void)close(fds[1]); 1688 1689 savederr = 0; 1690 Buf_Init(&buf, 0); 1691 1692 do { 1693 char result[BUFSIZ]; 1694 bytes_read = read(fds[0], result, sizeof(result)); 1695 if (bytes_read > 0) 1696 Buf_AddBytes(&buf, result, (size_t)bytes_read); 1697 } 1698 while (bytes_read > 0 || (bytes_read == -1 && errno == EINTR)); 1699 if (bytes_read == -1) 1700 savederr = errno; 1701 1702 /* 1703 * Close the input side of the pipe. 1704 */ 1705 (void)close(fds[0]); 1706 1707 /* 1708 * Wait for the process to exit. 1709 */ 1710 while(((pid = waitpid(cpid, &status, 0)) != cpid) && (pid >= 0)) { 1711 JobReapChild(pid, status, FALSE); 1712 continue; 1713 } 1714 res_len = Buf_Len(&buf); 1715 res = Buf_Destroy(&buf, FALSE); 1716 1717 if (savederr != 0) 1718 *errfmt = "Couldn't read shell's output for \"%s\""; 1719 1720 if (WIFSIGNALED(status)) 1721 *errfmt = "\"%s\" exited on a signal"; 1722 else if (WEXITSTATUS(status) != 0) 1723 *errfmt = "\"%s\" returned non-zero status"; 1724 1725 /* Convert newlines to spaces. A final newline is just stripped */ 1726 if (res_len > 0 && res[res_len - 1] == '\n') 1727 res[res_len - 1] = '\0'; 1728 for (cp = res; *cp != '\0'; cp++) 1729 if (*cp == '\n') 1730 *cp = ' '; 1731 break; 1732 } 1733 return res; 1734 bad: 1735 return bmake_strdup(""); 1736 } 1737 1738 /* Print a printf-style error message. 1739 * 1740 * This error message has no consequences, in particular it does not affect 1741 * the exit status. */ 1742 void 1743 Error(const char *fmt, ...) 1744 { 1745 va_list ap; 1746 FILE *err_file; 1747 1748 err_file = debug_file; 1749 if (err_file == stdout) 1750 err_file = stderr; 1751 (void)fflush(stdout); 1752 for (;;) { 1753 va_start(ap, fmt); 1754 fprintf(err_file, "%s: ", progname); 1755 (void)vfprintf(err_file, fmt, ap); 1756 va_end(ap); 1757 (void)fprintf(err_file, "\n"); 1758 (void)fflush(err_file); 1759 if (err_file == stderr) 1760 break; 1761 err_file = stderr; 1762 } 1763 } 1764 1765 /* Produce a Fatal error message, then exit immediately. 1766 * 1767 * If jobs are running, waits for them to finish. */ 1768 void 1769 Fatal(const char *fmt, ...) 1770 { 1771 va_list ap; 1772 1773 va_start(ap, fmt); 1774 if (jobsRunning) 1775 Job_Wait(); 1776 1777 (void)fflush(stdout); 1778 (void)vfprintf(stderr, fmt, ap); 1779 va_end(ap); 1780 (void)fprintf(stderr, "\n"); 1781 (void)fflush(stderr); 1782 1783 PrintOnError(NULL, NULL); 1784 1785 if (DEBUG(GRAPH2) || DEBUG(GRAPH3)) 1786 Targ_PrintGraph(2); 1787 Trace_Log(MAKEERROR, 0); 1788 exit(2); /* Not 1 so -q can distinguish error */ 1789 } 1790 1791 /* 1792 * Punt -- 1793 * Major exception once jobs are being created. Kills all jobs, prints 1794 * a message and exits. 1795 * 1796 * Results: 1797 * None 1798 * 1799 * Side Effects: 1800 * All children are killed indiscriminately and the program Lib_Exits 1801 */ 1802 void 1803 Punt(const char *fmt, ...) 1804 { 1805 va_list ap; 1806 1807 va_start(ap, fmt); 1808 (void)fflush(stdout); 1809 (void)fprintf(stderr, "%s: ", progname); 1810 (void)vfprintf(stderr, fmt, ap); 1811 va_end(ap); 1812 (void)fprintf(stderr, "\n"); 1813 (void)fflush(stderr); 1814 1815 PrintOnError(NULL, NULL); 1816 1817 DieHorribly(); 1818 } 1819 1820 /*- 1821 * DieHorribly -- 1822 * Exit without giving a message. 1823 * 1824 * Results: 1825 * None 1826 * 1827 * Side Effects: 1828 * A big one... 1829 */ 1830 void 1831 DieHorribly(void) 1832 { 1833 if (jobsRunning) 1834 Job_AbortAll(); 1835 if (DEBUG(GRAPH2)) 1836 Targ_PrintGraph(2); 1837 Trace_Log(MAKEERROR, 0); 1838 exit(2); /* Not 1, so -q can distinguish error */ 1839 } 1840 1841 /* 1842 * Finish -- 1843 * Called when aborting due to errors in child shell to signal 1844 * abnormal exit. 1845 * 1846 * Results: 1847 * None 1848 * 1849 * Side Effects: 1850 * The program exits 1851 */ 1852 void 1853 Finish(int errors) 1854 /* number of errors encountered in Make_Make */ 1855 { 1856 if (dieQuietly(NULL, -1)) 1857 exit(2); 1858 Fatal("%d error%s", errors, errors == 1 ? "" : "s"); 1859 } 1860 1861 /* 1862 * eunlink -- 1863 * Remove a file carefully, avoiding directories. 1864 */ 1865 int 1866 eunlink(const char *file) 1867 { 1868 struct stat st; 1869 1870 if (lstat(file, &st) == -1) 1871 return -1; 1872 1873 if (S_ISDIR(st.st_mode)) { 1874 errno = EISDIR; 1875 return -1; 1876 } 1877 return unlink(file); 1878 } 1879 1880 /* 1881 * execError -- 1882 * Print why exec failed, avoiding stdio. 1883 */ 1884 void 1885 execError(const char *af, const char *av) 1886 { 1887 #ifdef USE_IOVEC 1888 int i = 0; 1889 struct iovec iov[8]; 1890 #define IOADD(s) \ 1891 (void)(iov[i].iov_base = UNCONST(s), \ 1892 iov[i].iov_len = strlen(iov[i].iov_base), \ 1893 i++) 1894 #else 1895 #define IOADD(void)write(2, s, strlen(s)) 1896 #endif 1897 1898 IOADD(progname); 1899 IOADD(": "); 1900 IOADD(af); 1901 IOADD("("); 1902 IOADD(av); 1903 IOADD(") failed ("); 1904 IOADD(strerror(errno)); 1905 IOADD(")\n"); 1906 1907 #ifdef USE_IOVEC 1908 while (writev(2, iov, 8) == -1 && errno == EAGAIN) 1909 continue; 1910 #endif 1911 } 1912 1913 /* 1914 * usage -- 1915 * exit with usage message 1916 */ 1917 static void 1918 usage(void) 1919 { 1920 char *p; 1921 if ((p = strchr(progname, '[')) != NULL) 1922 *p = '\0'; 1923 1924 (void)fprintf(stderr, 1925 "usage: %s [-BeikNnqrstWwX] \n" 1926 " [-C directory] [-D variable] [-d flags] [-f makefile]\n" 1927 " [-I directory] [-J private] [-j max_jobs] [-m directory] [-T file]\n" 1928 " [-V variable] [-v variable] [variable=value] [target ...]\n", 1929 progname); 1930 exit(2); 1931 } 1932 1933 /* 1934 * realpath(3) can get expensive, cache results... 1935 */ 1936 static GNode *cached_realpaths = NULL; 1937 1938 static GNode * 1939 get_cached_realpaths(void) 1940 { 1941 1942 if (!cached_realpaths) { 1943 cached_realpaths = Targ_NewGN("Realpath"); 1944 #ifndef DEBUG_REALPATH_CACHE 1945 cached_realpaths->flags = INTERNAL; 1946 #endif 1947 } 1948 1949 return cached_realpaths; 1950 } 1951 1952 /* purge any relative paths */ 1953 static void 1954 purge_cached_realpaths(void) 1955 { 1956 GNode *cache = get_cached_realpaths(); 1957 Hash_Entry *he, *nhe; 1958 Hash_Search hs; 1959 1960 he = Hash_EnumFirst(&cache->context, &hs); 1961 while (he) { 1962 nhe = Hash_EnumNext(&hs); 1963 if (he->name[0] != '/') { 1964 if (DEBUG(DIR)) 1965 fprintf(stderr, "cached_realpath: purging %s\n", he->name); 1966 Hash_DeleteEntry(&cache->context, he); 1967 } 1968 he = nhe; 1969 } 1970 } 1971 1972 char * 1973 cached_realpath(const char *pathname, char *resolved) 1974 { 1975 GNode *cache; 1976 const char *rp; 1977 char *cp; 1978 1979 if (!pathname || !pathname[0]) 1980 return NULL; 1981 1982 cache = get_cached_realpaths(); 1983 1984 if ((rp = Var_Value(pathname, cache, &cp)) != NULL) { 1985 /* a hit */ 1986 strncpy(resolved, rp, MAXPATHLEN); 1987 resolved[MAXPATHLEN - 1] = '\0'; 1988 } else if ((rp = realpath(pathname, resolved)) != NULL) { 1989 Var_Set(pathname, rp, cache); 1990 } /* else should we negative-cache? */ 1991 1992 bmake_free(cp); 1993 return rp ? resolved : NULL; 1994 } 1995 1996 1997 static int 1998 addErrorCMD(void *cmdp, void *gnp) 1999 { 2000 if (cmdp == NULL) 2001 return 1; /* stop */ 2002 Var_Append(".ERROR_CMD", cmdp, VAR_GLOBAL); 2003 return 0; 2004 } 2005 2006 /* 2007 * Return true if we should die without noise. 2008 * For example our failing child was a sub-make 2009 * or failure happend elsewhere. 2010 */ 2011 int 2012 dieQuietly(GNode *gn, int bf) 2013 { 2014 static int quietly = -1; 2015 2016 if (quietly < 0) { 2017 if (DEBUG(JOB) || getBoolean(".MAKE.DIE_QUIETLY", 1) == 0) 2018 quietly = 0; 2019 else if (bf >= 0) 2020 quietly = bf; 2021 else 2022 quietly = (gn) ? ((gn->type & (OP_MAKE)) != 0) : 0; 2023 } 2024 return quietly; 2025 } 2026 2027 void 2028 PrintOnError(GNode *gn, const char *s) 2029 { 2030 static GNode *en = NULL; 2031 const char *expr; 2032 char *cp; 2033 2034 if (DEBUG(HASH)) { 2035 Targ_Stats(); 2036 Var_Stats(); 2037 } 2038 2039 /* we generally want to keep quiet if a sub-make died */ 2040 if (dieQuietly(gn, -1)) 2041 return; 2042 2043 if (s) 2044 printf("%s", s); 2045 2046 printf("\n%s: stopped in %s\n", progname, curdir); 2047 2048 if (en) 2049 return; /* we've been here! */ 2050 if (gn) { 2051 /* 2052 * We can print this even if there is no .ERROR target. 2053 */ 2054 Var_Set(".ERROR_TARGET", gn->name, VAR_GLOBAL); 2055 Var_Delete(".ERROR_CMD", VAR_GLOBAL); 2056 Lst_ForEachUntil(gn->commands, addErrorCMD, gn); 2057 } 2058 expr = "${MAKE_PRINT_VAR_ON_ERROR:@v@$v='${$v}'\n@}"; 2059 (void)Var_Subst(expr, VAR_GLOBAL, VARE_WANTRES, &cp); 2060 /* TODO: handle errors */ 2061 printf("%s", cp); 2062 free(cp); 2063 fflush(stdout); 2064 2065 /* 2066 * Finally, see if there is a .ERROR target, and run it if so. 2067 */ 2068 en = Targ_FindNode(".ERROR"); 2069 if (en) { 2070 en->type |= OP_SPECIAL; 2071 Compat_Make(en, en); 2072 } 2073 } 2074 2075 void 2076 Main_ExportMAKEFLAGS(Boolean first) 2077 { 2078 static Boolean once = TRUE; 2079 const char *expr; 2080 char *s; 2081 2082 if (once != first) 2083 return; 2084 once = FALSE; 2085 2086 expr = "${.MAKEFLAGS} ${.MAKEOVERRIDES:O:u:@v@$v=${$v:Q}@}"; 2087 (void)Var_Subst(expr, VAR_CMD, VARE_WANTRES, &s); 2088 /* TODO: handle errors */ 2089 if (s[0] != '\0') { 2090 #ifdef POSIX 2091 setenv("MAKEFLAGS", s, 1); 2092 #else 2093 setenv("MAKE", s, 1); 2094 #endif 2095 } 2096 } 2097 2098 char * 2099 getTmpdir(void) 2100 { 2101 static char *tmpdir = NULL; 2102 2103 if (!tmpdir) { 2104 struct stat st; 2105 2106 /* 2107 * Honor $TMPDIR but only if it is valid. 2108 * Ensure it ends with /. 2109 */ 2110 (void)Var_Subst("${TMPDIR:tA:U" _PATH_TMP "}/", VAR_GLOBAL, 2111 VARE_WANTRES, &tmpdir); 2112 /* TODO: handle errors */ 2113 if (stat(tmpdir, &st) < 0 || !S_ISDIR(st.st_mode)) { 2114 free(tmpdir); 2115 tmpdir = bmake_strdup(_PATH_TMP); 2116 } 2117 } 2118 return tmpdir; 2119 } 2120 2121 /* 2122 * Create and open a temp file using "pattern". 2123 * If "fnamep" is provided set it to a copy of the filename created. 2124 * Otherwise unlink the file once open. 2125 */ 2126 int 2127 mkTempFile(const char *pattern, char **fnamep) 2128 { 2129 static char *tmpdir = NULL; 2130 char tfile[MAXPATHLEN]; 2131 int fd; 2132 2133 if (!pattern) 2134 pattern = TMPPAT; 2135 if (!tmpdir) 2136 tmpdir = getTmpdir(); 2137 if (pattern[0] == '/') { 2138 snprintf(tfile, sizeof(tfile), "%s", pattern); 2139 } else { 2140 snprintf(tfile, sizeof(tfile), "%s%s", tmpdir, pattern); 2141 } 2142 if ((fd = mkstemp(tfile)) < 0) 2143 Punt("Could not create temporary file %s: %s", tfile, strerror(errno)); 2144 if (fnamep) { 2145 *fnamep = bmake_strdup(tfile); 2146 } else { 2147 unlink(tfile); /* we just want the descriptor */ 2148 } 2149 return fd; 2150 } 2151 2152 /* 2153 * Convert a string representation of a boolean. 2154 * Anything that looks like "No", "False", "Off", "0" etc, 2155 * is FALSE, otherwise TRUE. 2156 */ 2157 Boolean 2158 s2Boolean(const char *s, Boolean bf) 2159 { 2160 if (s) { 2161 switch(*s) { 2162 case '\0': /* not set - the default wins */ 2163 break; 2164 case '0': 2165 case 'F': 2166 case 'f': 2167 case 'N': 2168 case 'n': 2169 bf = FALSE; 2170 break; 2171 case 'O': 2172 case 'o': 2173 switch (s[1]) { 2174 case 'F': 2175 case 'f': 2176 bf = FALSE; 2177 break; 2178 default: 2179 bf = TRUE; 2180 break; 2181 } 2182 break; 2183 default: 2184 bf = TRUE; 2185 break; 2186 } 2187 } 2188 return bf; 2189 } 2190 2191 /* 2192 * Return a Boolean based on setting of a knob. 2193 * 2194 * If the knob is not set, the supplied default is the return value. 2195 * If set, anything that looks or smells like "No", "False", "Off", "0" etc, 2196 * is FALSE, otherwise TRUE. 2197 */ 2198 Boolean 2199 getBoolean(const char *name, Boolean fallback) 2200 { 2201 char *expr = str_concat3("${", name, ":U:tl}"); 2202 char *value; 2203 Boolean res; 2204 2205 (void)Var_Subst(expr, VAR_GLOBAL, VARE_WANTRES, &value); 2206 /* TODO: handle errors */ 2207 res = s2Boolean(value, fallback); 2208 free(value); 2209 free(expr); 2210 return res; 2211 } 2212
Indexes created Mon Sep 22 13:09:51 GMT 2025