main.c revision 1.359
1 /* $NetBSD: main.c,v 1.359 2020/10/01 23:42:22 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 <ctype.h> 110 #include <errno.h> 111 #include <signal.h> 112 #include <stdarg.h> 113 #include <stdio.h> 114 #include <stdlib.h> 115 #include <time.h> 116 117 #include "make.h" 118 #include "hash.h" 119 #include "dir.h" 120 #include "job.h" 121 #include "pathnames.h" 122 #include "trace.h" 123 124 #ifdef USE_IOVEC 125 #include <sys/uio.h> 126 #endif 127 128 /* "@(#)main.c 8.3 (Berkeley) 3/19/94" */ 129 MAKE_RCSID("$NetBSD: main.c,v 1.359 2020/10/01 23:42:22 rillig Exp $"); 130 #if defined(MAKE_NATIVE) && !defined(lint) 131 __COPYRIGHT("@(#) Copyright (c) 1988, 1989, 1990, 1993\ 132 The Regents of the University of California. All rights reserved."); 133 #endif 134 135 #ifndef DEFMAXLOCAL 136 #define DEFMAXLOCAL DEFMAXJOBS 137 #endif 138 139 StringList * create; /* Targets to be made */ 140 time_t now; /* Time at start of make */ 141 GNode *DEFAULT; /* .DEFAULT node */ 142 Boolean allPrecious; /* .PRECIOUS given on line by itself */ 143 Boolean deleteOnError; /* .DELETE_ON_ERROR: set */ 144 145 static Boolean noBuiltins; /* -r flag */ 146 static StringList * makefiles; /* ordered list of makefiles to read */ 147 static int printVars; /* -[vV] argument */ 148 #define COMPAT_VARS 1 149 #define EXPAND_VARS 2 150 static StringList * variables; /* list of variables to print 151 * (for -v and -V) */ 152 int maxJobs; /* -j argument */ 153 static int maxJobTokens; /* -j argument */ 154 Boolean compatMake; /* -B argument */ 155 int debug; /* -d argument */ 156 Boolean debugVflag; /* -dV */ 157 Boolean noExecute; /* -n flag */ 158 Boolean noRecursiveExecute; /* -N flag */ 159 Boolean keepgoing; /* -k flag */ 160 Boolean queryFlag; /* -q flag */ 161 Boolean touchFlag; /* -t flag */ 162 Boolean enterFlag; /* -w flag */ 163 Boolean enterFlagObj; /* -w and objdir != srcdir */ 164 Boolean ignoreErrors; /* -i flag */ 165 Boolean beSilent; /* -s flag */ 166 Boolean oldVars; /* variable substitution style */ 167 Boolean checkEnvFirst; /* -e flag */ 168 Boolean parseWarnFatal; /* -W flag */ 169 static int jp_0 = -1, jp_1 = -1; /* ends of parent job pipe */ 170 Boolean varNoExportEnv; /* -X flag */ 171 Boolean doing_depend; /* Set while reading .depend */ 172 static Boolean jobsRunning; /* TRUE if the jobs might be running */ 173 static const char * tracefile; 174 static int ReadMakefile(const char *); 175 static void usage(void) MAKE_ATTR_DEAD; 176 static void purge_cached_realpaths(void); 177 178 static Boolean ignorePWD; /* if we use -C, PWD is meaningless */ 179 static char objdir[MAXPATHLEN + 1]; /* where we chdir'ed to */ 180 char curdir[MAXPATHLEN + 1]; /* Startup directory */ 181 char *progname; /* the program name */ 182 char *makeDependfile; 183 pid_t myPid; 184 int makelevel; 185 186 FILE *debug_file; 187 188 Boolean forceJobs = FALSE; 189 190 extern SearchPath *parseIncPath; 191 192 /* 193 * For compatibility with the POSIX version of MAKEFLAGS that includes 194 * all the options with out -, convert flags to -f -l -a -g -s. 195 */ 196 static char * 197 explode(const char *flags) 198 { 199 size_t len; 200 char *nf, *st; 201 const char *f; 202 203 if (flags == NULL) 204 return NULL; 205 206 for (f = flags; *f; f++) 207 if (!ch_isalpha(*f)) 208 break; 209 210 if (*f) 211 return bmake_strdup(flags); 212 213 len = strlen(flags); 214 st = nf = bmake_malloc(len * 3 + 1); 215 while (*flags) { 216 *nf++ = '-'; 217 *nf++ = *flags++; 218 *nf++ = ' '; 219 } 220 *nf = '\0'; 221 return st; 222 } 223 224 static void 225 parse_debug_option_F(const char *modules) 226 { 227 const char *mode; 228 size_t len; 229 char *fname; 230 231 if (debug_file != stdout && debug_file != stderr) 232 fclose(debug_file); 233 234 if (*modules == '+') { 235 modules++; 236 mode = "a"; 237 } else 238 mode = "w"; 239 240 if (strcmp(modules, "stdout") == 0) { 241 debug_file = stdout; 242 return; 243 } 244 if (strcmp(modules, "stderr") == 0) { 245 debug_file = stderr; 246 return; 247 } 248 249 len = strlen(modules); 250 fname = bmake_malloc(len + 20); 251 memcpy(fname, modules, len + 1); 252 253 /* Let the filename be modified by the pid */ 254 if (strcmp(fname + len - 3, ".%d") == 0) 255 snprintf(fname + len - 2, 20, "%d", getpid()); 256 257 debug_file = fopen(fname, mode); 258 if (!debug_file) { 259 fprintf(stderr, "Cannot open debug file %s\n", 260 fname); 261 usage(); 262 } 263 free(fname); 264 } 265 266 static void 267 parse_debug_options(const char *argvalue) 268 { 269 const char *modules; 270 271 for (modules = argvalue; *modules; ++modules) { 272 switch (*modules) { 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, 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 if (Parse_IsVar(argv[1])) { 678 Parse_DoVar(argv[1], VAR_CMD); 679 } else { 680 if (!*argv[1]) 681 Punt("illegal (null) argument."); 682 if (*argv[1] == '-' && !dashDash) 683 goto rearg; 684 Lst_Append(create, bmake_strdup(argv[1])); 685 } 686 687 return; 688 noarg: 689 (void)fprintf(stderr, "%s: option requires an argument -- %c\n", 690 progname, c); 691 usage(); 692 } 693 694 /*- 695 * Main_ParseArgLine -- 696 * Used by the parse module when a .MFLAGS or .MAKEFLAGS target 697 * is encountered and by main() when reading the .MAKEFLAGS envariable. 698 * Takes a line of arguments and breaks it into its 699 * component words and passes those words and the number of them to the 700 * MainParseArgs function. 701 * The line should have all its leading whitespace removed. 702 * 703 * Input: 704 * line Line to fracture 705 * 706 * Results: 707 * None 708 * 709 * Side Effects: 710 * Only those that come from the various arguments. 711 */ 712 void 713 Main_ParseArgLine(const char *line) 714 { 715 Words words; 716 char *p1; 717 const char *argv0 = Var_Value(".MAKE", VAR_GLOBAL, &p1); 718 char *buf; 719 720 if (line == NULL) 721 return; 722 for (; *line == ' '; ++line) 723 continue; 724 if (!*line) 725 return; 726 727 buf = str_concat3(argv0, " ", line); 728 free(p1); 729 730 words = Str_Words(buf, TRUE); 731 if (words.words == NULL) { 732 Error("Unterminated quoted string [%s]", buf); 733 free(buf); 734 return; 735 } 736 free(buf); 737 MainParseArgs((int)words.len, words.words); 738 739 Words_Free(words); 740 } 741 742 Boolean 743 Main_SetObjdir(const char *fmt, ...) 744 { 745 struct stat sb; 746 char *path; 747 char buf[MAXPATHLEN + 1]; 748 char buf2[MAXPATHLEN + 1]; 749 Boolean rc = FALSE; 750 va_list ap; 751 752 va_start(ap, fmt); 753 vsnprintf(path = buf, MAXPATHLEN, fmt, ap); 754 va_end(ap); 755 756 if (path[0] != '/') { 757 snprintf(buf2, MAXPATHLEN, "%s/%s", curdir, path); 758 path = buf2; 759 } 760 761 /* look for the directory and try to chdir there */ 762 if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) { 763 if (chdir(path)) { 764 (void)fprintf(stderr, "make warning: %s: %s.\n", 765 path, strerror(errno)); 766 } else { 767 snprintf(objdir, sizeof objdir, "%s", path); 768 Var_Set(".OBJDIR", objdir, VAR_GLOBAL); 769 setenv("PWD", objdir, 1); 770 Dir_InitDot(); 771 purge_cached_realpaths(); 772 rc = TRUE; 773 if (enterFlag && strcmp(objdir, curdir) != 0) 774 enterFlagObj = TRUE; 775 } 776 } 777 778 return rc; 779 } 780 781 static Boolean 782 Main_SetVarObjdir(const char *var, const char *suffix) 783 { 784 char *path_freeIt; 785 const char *path = Var_Value(var, VAR_CMD, &path_freeIt); 786 const char *xpath; 787 char *xpath_freeIt; 788 789 if (path == NULL || path[0] == '\0') { 790 bmake_free(path_freeIt); 791 return FALSE; 792 } 793 794 /* expand variable substitutions */ 795 xpath = path; 796 xpath_freeIt = NULL; 797 if (strchr(path, '$') != 0) { 798 (void)Var_Subst(path, VAR_GLOBAL, VARE_WANTRES, &xpath_freeIt); 799 /* TODO: handle errors */ 800 xpath = xpath_freeIt; 801 } 802 803 (void)Main_SetObjdir("%s%s", xpath, suffix); 804 805 bmake_free(xpath_freeIt); 806 bmake_free(path_freeIt); 807 return TRUE; 808 } 809 810 /* Read and parse the makefile. 811 * Return TRUE if reading the makefile succeeded, for Lst_Find. */ 812 static Boolean 813 ReadMakefileSucceeded(const void *fname, const void *unused) 814 { 815 return ReadMakefile(fname) == 0; 816 } 817 818 /* Read and parse the makefile. 819 * Return TRUE if reading the makefile failed, for Lst_Find. */ 820 static Boolean 821 ReadMakefileFailed(const void *fname, const void *unused) 822 { 823 return ReadMakefile(fname) != 0; 824 } 825 826 int 827 str2Lst_Append(StringList *lp, char *str, const char *sep) 828 { 829 char *cp; 830 int n; 831 832 if (!sep) 833 sep = " \t"; 834 835 for (n = 0, cp = strtok(str, sep); cp; cp = strtok(NULL, sep)) { 836 Lst_Append(lp, cp); 837 n++; 838 } 839 return n; 840 } 841 842 #ifdef SIGINFO 843 /*ARGSUSED*/ 844 static void 845 siginfo(int signo MAKE_ATTR_UNUSED) 846 { 847 char dir[MAXPATHLEN]; 848 char str[2 * MAXPATHLEN]; 849 int len; 850 if (getcwd(dir, sizeof(dir)) == NULL) 851 return; 852 len = snprintf(str, sizeof(str), "%s: Working in: %s\n", progname, dir); 853 if (len > 0) 854 (void)write(STDERR_FILENO, str, (size_t)len); 855 } 856 #endif 857 858 /* 859 * Allow makefiles some control over the mode we run in. 860 */ 861 void 862 MakeMode(const char *mode) 863 { 864 char *mode_freeIt = NULL; 865 866 if (mode == NULL) { 867 (void)Var_Subst("${" MAKE_MODE ":tl}", 868 VAR_GLOBAL, VARE_WANTRES, &mode_freeIt); 869 /* TODO: handle errors */ 870 mode = mode_freeIt; 871 } 872 873 if (mode[0] != '\0') { 874 if (strstr(mode, "compat")) { 875 compatMake = TRUE; 876 forceJobs = FALSE; 877 } 878 #if USE_META 879 if (strstr(mode, "meta")) 880 meta_mode_init(mode); 881 #endif 882 } 883 884 free(mode_freeIt); 885 } 886 887 static void 888 doPrintVars(void) 889 { 890 StringListNode *ln; 891 Boolean expandVars; 892 893 if (printVars == EXPAND_VARS) 894 expandVars = TRUE; 895 else if (debugVflag) 896 expandVars = FALSE; 897 else 898 expandVars = getBoolean(".MAKE.EXPAND_VARIABLES", FALSE); 899 900 for (ln = variables->first; ln != NULL; ln = ln->next) { 901 const char *var = ln->datum; 902 const char *value; 903 char *p1; 904 905 if (strchr(var, '$')) { 906 (void)Var_Subst(var, VAR_GLOBAL, VARE_WANTRES, &p1); 907 /* TODO: handle errors */ 908 value = p1; 909 } else if (expandVars) { 910 char *expr = str_concat3("${", var, "}"); 911 (void)Var_Subst(expr, VAR_GLOBAL, VARE_WANTRES, &p1); 912 /* TODO: handle errors */ 913 value = p1; 914 free(expr); 915 } else { 916 value = Var_Value(var, VAR_GLOBAL, &p1); 917 } 918 printf("%s\n", value ? value : ""); 919 bmake_free(p1); 920 } 921 } 922 923 static Boolean 924 runTargets(void) 925 { 926 GNodeList *targs; /* target nodes to create -- passed to Make_Init */ 927 Boolean outOfDate; /* FALSE if all targets up to date */ 928 929 /* 930 * Have now read the entire graph and need to make a list of 931 * targets to create. If none was given on the command line, 932 * we consult the parsing module to find the main target(s) 933 * to create. 934 */ 935 if (Lst_IsEmpty(create)) 936 targs = Parse_MainName(); 937 else 938 targs = Targ_FindList(create); 939 940 if (!compatMake) { 941 /* 942 * Initialize job module before traversing the graph 943 * now that any .BEGIN and .END targets have been read. 944 * This is done only if the -q flag wasn't given 945 * (to prevent the .BEGIN from being executed should 946 * it exist). 947 */ 948 if (!queryFlag) { 949 Job_Init(); 950 jobsRunning = TRUE; 951 } 952 953 /* Traverse the graph, checking on all the targets */ 954 outOfDate = Make_Run(targs); 955 } else { 956 /* 957 * Compat_Init will take care of creating all the 958 * targets as well as initializing the module. 959 */ 960 Compat_Run(targs); 961 outOfDate = FALSE; 962 } 963 Lst_Free(targs); 964 return outOfDate; 965 } 966 967 /* 968 * Set up the .TARGETS variable to contain the list of targets to be 969 * created. If none specified, make the variable empty -- the parser 970 * will fill the thing in with the default or .MAIN target. 971 */ 972 static void 973 InitVarTargets(void) 974 { 975 StringListNode *ln; 976 977 if (Lst_IsEmpty(create)) { 978 Var_Set(".TARGETS", "", VAR_GLOBAL); 979 return; 980 } 981 982 for (ln = create->first; ln != NULL; ln = ln->next) { 983 char *name = ln->datum; 984 Var_Append(".TARGETS", name, VAR_GLOBAL); 985 } 986 } 987 988 /*- 989 * main -- 990 * The main function, for obvious reasons. Initializes variables 991 * and a few modules, then parses the arguments give it in the 992 * environment and on the command line. Reads the system makefile 993 * followed by either Makefile, makefile or the file given by the 994 * -f argument. Sets the .MAKEFLAGS PMake variable based on all the 995 * flags it has received by then uses either the Make or the Compat 996 * module to create the initial list of targets. 997 * 998 * Results: 999 * If -q was given, exits -1 if anything was out-of-date. Else it exits 1000 * 0. 1001 * 1002 * Side Effects: 1003 * The program exits when done. Targets are created. etc. etc. etc. 1004 */ 1005 int 1006 main(int argc, char **argv) 1007 { 1008 Boolean outOfDate; /* FALSE if all targets up to date */ 1009 struct stat sb, sa; 1010 char *p1, *path; 1011 char mdpath[MAXPATHLEN]; 1012 const char *machine = getenv("MACHINE"); 1013 const char *machine_arch = getenv("MACHINE_ARCH"); 1014 char *syspath = getenv("MAKESYSPATH"); 1015 StringList *sysMkPath; /* Path of sys.mk */ 1016 char *cp = NULL, *start; 1017 /* avoid faults on read-only strings */ 1018 static char defsyspath[] = _PATH_DEFSYSPATH; 1019 char found_path[MAXPATHLEN + 1]; /* for searching for sys.mk */ 1020 struct timeval rightnow; /* to initialize random seed */ 1021 struct utsname utsname; 1022 1023 /* default to writing debug to stderr */ 1024 debug_file = stderr; 1025 1026 #ifdef SIGINFO 1027 (void)bmake_signal(SIGINFO, siginfo); 1028 #endif 1029 /* 1030 * Set the seed to produce a different random sequence 1031 * on each program execution. 1032 */ 1033 gettimeofday(&rightnow, NULL); 1034 srandom(rightnow.tv_sec + rightnow.tv_usec); 1035 1036 if ((progname = strrchr(argv[0], '/')) != NULL) 1037 progname++; 1038 else 1039 progname = argv[0]; 1040 #if defined(MAKE_NATIVE) || (defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE)) 1041 /* 1042 * get rid of resource limit on file descriptors 1043 */ 1044 { 1045 struct rlimit rl; 1046 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 && 1047 rl.rlim_cur != rl.rlim_max) { 1048 rl.rlim_cur = rl.rlim_max; 1049 (void)setrlimit(RLIMIT_NOFILE, &rl); 1050 } 1051 } 1052 #endif 1053 1054 if (uname(&utsname) == -1) { 1055 (void)fprintf(stderr, "%s: uname failed (%s).\n", progname, 1056 strerror(errno)); 1057 exit(2); 1058 } 1059 1060 /* 1061 * Get the name of this type of MACHINE from utsname 1062 * so we can share an executable for similar machines. 1063 * (i.e. m68k: amiga hp300, mac68k, sun3, ...) 1064 * 1065 * Note that both MACHINE and MACHINE_ARCH are decided at 1066 * run-time. 1067 */ 1068 if (!machine) { 1069 #ifdef MAKE_NATIVE 1070 machine = utsname.machine; 1071 #else 1072 #ifdef MAKE_MACHINE 1073 machine = MAKE_MACHINE; 1074 #else 1075 machine = "unknown"; 1076 #endif 1077 #endif 1078 } 1079 1080 if (!machine_arch) { 1081 #ifdef MAKE_NATIVE 1082 static char machine_arch_buf[sizeof(utsname.machine)]; 1083 const int mib[2] = { CTL_HW, HW_MACHINE_ARCH }; 1084 size_t len = sizeof(machine_arch_buf); 1085 1086 if (sysctl(mib, __arraycount(mib), machine_arch_buf, 1087 &len, NULL, 0) < 0) { 1088 (void)fprintf(stderr, "%s: sysctl failed (%s).\n", progname, 1089 strerror(errno)); 1090 exit(2); 1091 } 1092 1093 machine_arch = machine_arch_buf; 1094 #else 1095 #ifndef MACHINE_ARCH 1096 #ifdef MAKE_MACHINE_ARCH 1097 machine_arch = MAKE_MACHINE_ARCH; 1098 #else 1099 machine_arch = "unknown"; 1100 #endif 1101 #else 1102 machine_arch = MACHINE_ARCH; 1103 #endif 1104 #endif 1105 } 1106 1107 myPid = getpid(); /* remember this for vFork() */ 1108 1109 /* 1110 * Just in case MAKEOBJDIR wants us to do something tricky. 1111 */ 1112 Var_Init(); /* Initialize the lists of variables for 1113 * parsing arguments */ 1114 Var_Set(".MAKE.OS", utsname.sysname, VAR_GLOBAL); 1115 Var_Set("MACHINE", machine, VAR_GLOBAL); 1116 Var_Set("MACHINE_ARCH", machine_arch, VAR_GLOBAL); 1117 #ifdef MAKE_VERSION 1118 Var_Set("MAKE_VERSION", MAKE_VERSION, VAR_GLOBAL); 1119 #endif 1120 Var_Set(".newline", "\n", VAR_GLOBAL); /* handy for :@ loops */ 1121 /* 1122 * This is the traditional preference for makefiles. 1123 */ 1124 #ifndef MAKEFILE_PREFERENCE_LIST 1125 # define MAKEFILE_PREFERENCE_LIST "makefile Makefile" 1126 #endif 1127 Var_Set(MAKEFILE_PREFERENCE, MAKEFILE_PREFERENCE_LIST, 1128 VAR_GLOBAL); 1129 Var_Set(MAKE_DEPENDFILE, ".depend", VAR_GLOBAL); 1130 1131 create = Lst_Init(); 1132 makefiles = Lst_Init(); 1133 printVars = 0; 1134 debugVflag = FALSE; 1135 variables = Lst_Init(); 1136 beSilent = FALSE; /* Print commands as executed */ 1137 ignoreErrors = FALSE; /* Pay attention to non-zero returns */ 1138 noExecute = FALSE; /* Execute all commands */ 1139 noRecursiveExecute = FALSE; /* Execute all .MAKE targets */ 1140 keepgoing = FALSE; /* Stop on error */ 1141 allPrecious = FALSE; /* Remove targets when interrupted */ 1142 deleteOnError = FALSE; /* Historical default behavior */ 1143 queryFlag = FALSE; /* This is not just a check-run */ 1144 noBuiltins = FALSE; /* Read the built-in rules */ 1145 touchFlag = FALSE; /* Actually update targets */ 1146 debug = 0; /* No debug verbosity, please. */ 1147 jobsRunning = FALSE; 1148 1149 maxJobs = DEFMAXLOCAL; /* Set default local max concurrency */ 1150 maxJobTokens = maxJobs; 1151 compatMake = FALSE; /* No compat mode */ 1152 ignorePWD = FALSE; 1153 1154 /* 1155 * Initialize the parsing, directory and variable modules to prepare 1156 * for the reading of inclusion paths and variable settings on the 1157 * command line 1158 */ 1159 1160 /* 1161 * Initialize various variables. 1162 * MAKE also gets this name, for compatibility 1163 * .MAKEFLAGS gets set to the empty string just in case. 1164 * MFLAGS also gets initialized empty, for compatibility. 1165 */ 1166 Parse_Init(); 1167 if (argv[0][0] == '/' || strchr(argv[0], '/') == NULL) { 1168 /* 1169 * Leave alone if it is an absolute path, or if it does 1170 * not contain a '/' in which case we need to find it in 1171 * the path, like execvp(3) and the shells do. 1172 */ 1173 p1 = argv[0]; 1174 } else { 1175 /* 1176 * A relative path, canonicalize it. 1177 */ 1178 p1 = cached_realpath(argv[0], mdpath); 1179 if (!p1 || *p1 != '/' || stat(p1, &sb) < 0) { 1180 p1 = argv[0]; /* realpath failed */ 1181 } 1182 } 1183 Var_Set("MAKE", p1, VAR_GLOBAL); 1184 Var_Set(".MAKE", p1, VAR_GLOBAL); 1185 Var_Set(MAKEFLAGS, "", VAR_GLOBAL); 1186 Var_Set(MAKEOVERRIDES, "", VAR_GLOBAL); 1187 Var_Set("MFLAGS", "", VAR_GLOBAL); 1188 Var_Set(".ALLTARGETS", "", VAR_GLOBAL); 1189 /* some makefiles need to know this */ 1190 Var_Set(MAKE_LEVEL ".ENV", MAKE_LEVEL_ENV, VAR_CMD); 1191 1192 /* 1193 * Set some other useful macros 1194 */ 1195 { 1196 char tmp[64], *ep; 1197 1198 makelevel = ((ep = getenv(MAKE_LEVEL_ENV)) && *ep) ? atoi(ep) : 0; 1199 if (makelevel < 0) 1200 makelevel = 0; 1201 snprintf(tmp, sizeof(tmp), "%d", makelevel); 1202 Var_Set(MAKE_LEVEL, tmp, VAR_GLOBAL); 1203 snprintf(tmp, sizeof(tmp), "%u", myPid); 1204 Var_Set(".MAKE.PID", tmp, VAR_GLOBAL); 1205 snprintf(tmp, sizeof(tmp), "%u", getppid()); 1206 Var_Set(".MAKE.PPID", tmp, VAR_GLOBAL); 1207 } 1208 if (makelevel > 0) { 1209 char pn[1024]; 1210 snprintf(pn, sizeof(pn), "%s[%d]", progname, makelevel); 1211 progname = bmake_strdup(pn); 1212 } 1213 1214 #ifdef USE_META 1215 meta_init(); 1216 #endif 1217 Dir_Init(); 1218 1219 /* 1220 * First snag any flags out of the MAKE environment variable. 1221 * (Note this is *not* MAKEFLAGS since /bin/make uses that and it's 1222 * in a different format). 1223 */ 1224 #ifdef POSIX 1225 p1 = explode(getenv("MAKEFLAGS")); 1226 Main_ParseArgLine(p1); 1227 free(p1); 1228 #else 1229 Main_ParseArgLine(getenv("MAKE")); 1230 #endif 1231 1232 /* 1233 * Find where we are (now). 1234 * We take care of PWD for the automounter below... 1235 */ 1236 if (getcwd(curdir, MAXPATHLEN) == NULL) { 1237 (void)fprintf(stderr, "%s: getcwd: %s.\n", 1238 progname, strerror(errno)); 1239 exit(2); 1240 } 1241 1242 MainParseArgs(argc, argv); 1243 1244 if (enterFlag) 1245 printf("%s: Entering directory `%s'\n", progname, curdir); 1246 1247 /* 1248 * Verify that cwd is sane. 1249 */ 1250 if (stat(curdir, &sa) == -1) { 1251 (void)fprintf(stderr, "%s: %s: %s.\n", 1252 progname, curdir, strerror(errno)); 1253 exit(2); 1254 } 1255 1256 /* 1257 * All this code is so that we know where we are when we start up 1258 * on a different machine with pmake. 1259 * Overriding getcwd() with $PWD totally breaks MAKEOBJDIRPREFIX 1260 * since the value of curdir can vary depending on how we got 1261 * here. Ie sitting at a shell prompt (shell that provides $PWD) 1262 * or via subdir.mk in which case its likely a shell which does 1263 * not provide it. 1264 * So, to stop it breaking this case only, we ignore PWD if 1265 * MAKEOBJDIRPREFIX is set or MAKEOBJDIR contains a transform. 1266 */ 1267 #ifndef NO_PWD_OVERRIDE 1268 if (!ignorePWD) { 1269 char *pwd, *ptmp1 = NULL, *ptmp2 = NULL; 1270 1271 if ((pwd = getenv("PWD")) != NULL && 1272 Var_Value("MAKEOBJDIRPREFIX", VAR_CMD, &ptmp1) == NULL) { 1273 const char *makeobjdir = Var_Value("MAKEOBJDIR", 1274 VAR_CMD, &ptmp2); 1275 1276 if (makeobjdir == NULL || !strchr(makeobjdir, '$')) { 1277 if (stat(pwd, &sb) == 0 && 1278 sa.st_ino == sb.st_ino && 1279 sa.st_dev == sb.st_dev) 1280 (void)strncpy(curdir, pwd, MAXPATHLEN); 1281 } 1282 } 1283 bmake_free(ptmp1); 1284 bmake_free(ptmp2); 1285 } 1286 #endif 1287 Var_Set(".CURDIR", curdir, VAR_GLOBAL); 1288 1289 /* 1290 * Find the .OBJDIR. If MAKEOBJDIRPREFIX, or failing that, 1291 * MAKEOBJDIR is set in the environment, try only that value 1292 * and fall back to .CURDIR if it does not exist. 1293 * 1294 * Otherwise, try _PATH_OBJDIR.MACHINE-MACHINE_ARCH, _PATH_OBJDIR.MACHINE, 1295 * and * finally _PATH_OBJDIRPREFIX`pwd`, in that order. If none 1296 * of these paths exist, just use .CURDIR. 1297 */ 1298 Dir_InitDir(curdir); 1299 (void)Main_SetObjdir("%s", curdir); 1300 1301 if (!Main_SetVarObjdir("MAKEOBJDIRPREFIX", curdir) && 1302 !Main_SetVarObjdir("MAKEOBJDIR", "") && 1303 !Main_SetObjdir("%s.%s-%s", _PATH_OBJDIR, machine, machine_arch) && 1304 !Main_SetObjdir("%s.%s", _PATH_OBJDIR, machine) && 1305 !Main_SetObjdir("%s", _PATH_OBJDIR)) 1306 (void)Main_SetObjdir("%s%s", _PATH_OBJDIRPREFIX, curdir); 1307 1308 /* 1309 * Initialize archive, target and suffix modules in preparation for 1310 * parsing the makefile(s) 1311 */ 1312 Arch_Init(); 1313 Targ_Init(); 1314 Suff_Init(); 1315 Trace_Init(tracefile); 1316 1317 DEFAULT = NULL; 1318 (void)time(&now); 1319 1320 Trace_Log(MAKESTART, NULL); 1321 1322 InitVarTargets(); 1323 1324 /* 1325 * If no user-supplied system path was given (through the -m option) 1326 * add the directories from the DEFSYSPATH (more than one may be given 1327 * as dir1:...:dirn) to the system include path. 1328 */ 1329 /* XXX: mismatch: the -m option sets sysIncPath, not syspath */ 1330 if (syspath == NULL || syspath[0] == '\0') 1331 syspath = defsyspath; 1332 else 1333 syspath = bmake_strdup(syspath); 1334 1335 for (start = syspath; *start != '\0'; start = cp) { 1336 for (cp = start; *cp != '\0' && *cp != ':'; cp++) 1337 continue; 1338 if (*cp == ':') { 1339 *cp++ = '\0'; 1340 } 1341 /* look for magic parent directory search string */ 1342 if (strncmp(".../", start, 4) != 0) { 1343 (void)Dir_AddDir(defIncPath, start); 1344 } else { 1345 if (Dir_FindHereOrAbove(curdir, start+4, 1346 found_path, sizeof(found_path))) { 1347 (void)Dir_AddDir(defIncPath, found_path); 1348 } 1349 } 1350 } 1351 if (syspath != defsyspath) 1352 free(syspath); 1353 1354 /* 1355 * Read in the built-in rules first, followed by the specified 1356 * makefiles, or the default makefile and Makefile, in that order, 1357 * if no makefiles were given on the command line. 1358 */ 1359 if (!noBuiltins) { 1360 StringListNode *ln; 1361 1362 sysMkPath = Lst_Init(); 1363 Dir_Expand(_PATH_DEFSYSMK, 1364 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath, 1365 sysMkPath); 1366 if (Lst_IsEmpty(sysMkPath)) 1367 Fatal("%s: no system rules (%s).", progname, 1368 _PATH_DEFSYSMK); 1369 ln = Lst_Find(sysMkPath, ReadMakefileSucceeded, NULL); 1370 if (ln == NULL) 1371 Fatal("%s: cannot open %s.", progname, 1372 (char *)LstNode_Datum(Lst_First(sysMkPath))); 1373 } 1374 1375 if (!Lst_IsEmpty(makefiles)) { 1376 StringListNode *ln; 1377 1378 ln = Lst_Find(makefiles, ReadMakefileFailed, NULL); 1379 if (ln != NULL) 1380 Fatal("%s: cannot open %s.", progname, 1381 (char *)LstNode_Datum(ln)); 1382 } else { 1383 (void)Var_Subst("${" MAKEFILE_PREFERENCE "}", 1384 VAR_CMD, VARE_WANTRES, &p1); 1385 /* TODO: handle errors */ 1386 (void)str2Lst_Append(makefiles, p1, NULL); 1387 (void)Lst_Find(makefiles, ReadMakefileSucceeded, NULL); 1388 free(p1); 1389 } 1390 1391 /* In particular suppress .depend for '-r -V .OBJDIR -f /dev/null' */ 1392 if (!noBuiltins || !printVars) { 1393 (void)Var_Subst("${.MAKE.DEPENDFILE:T}", 1394 VAR_CMD, VARE_WANTRES, &makeDependfile); 1395 /* TODO: handle errors */ 1396 doing_depend = TRUE; 1397 (void)ReadMakefile(makeDependfile); 1398 doing_depend = FALSE; 1399 } 1400 1401 if (enterFlagObj) 1402 printf("%s: Entering directory `%s'\n", progname, objdir); 1403 1404 MakeMode(NULL); 1405 1406 Var_Append("MFLAGS", Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1), VAR_GLOBAL); 1407 bmake_free(p1); 1408 1409 if (!forceJobs && !compatMake && 1410 Var_Exists(".MAKE.JOBS", VAR_GLOBAL)) { 1411 char *value; 1412 int n; 1413 1414 (void)Var_Subst("${.MAKE.JOBS}", VAR_GLOBAL, VARE_WANTRES, &value); 1415 /* TODO: handle errors */ 1416 n = strtol(value, NULL, 0); 1417 if (n < 1) { 1418 (void)fprintf(stderr, "%s: illegal value for .MAKE.JOBS -- must be positive integer!\n", 1419 progname); 1420 exit(1); 1421 } 1422 if (n != maxJobs) { 1423 Var_Append(MAKEFLAGS, "-j", VAR_GLOBAL); 1424 Var_Append(MAKEFLAGS, value, VAR_GLOBAL); 1425 } 1426 maxJobs = n; 1427 maxJobTokens = maxJobs; 1428 forceJobs = TRUE; 1429 free(value); 1430 } 1431 1432 /* 1433 * Be compatible if user did not specify -j and did not explicitly 1434 * turned compatibility on 1435 */ 1436 if (!compatMake && !forceJobs) { 1437 compatMake = TRUE; 1438 } 1439 1440 if (!compatMake) 1441 Job_ServerStart(maxJobTokens, jp_0, jp_1); 1442 DEBUG5(JOB, "job_pipe %d %d, maxjobs %d, tokens %d, compat %d\n", 1443 jp_0, jp_1, maxJobs, maxJobTokens, compatMake ? 1 : 0); 1444 1445 if (!printVars) 1446 Main_ExportMAKEFLAGS(TRUE); /* initial export */ 1447 1448 1449 /* 1450 * For compatibility, look at the directories in the VPATH variable 1451 * and add them to the search path, if the variable is defined. The 1452 * variable's value is in the same format as the PATH envariable, i.e. 1453 * <directory>:<directory>:<directory>... 1454 */ 1455 if (Var_Exists("VPATH", VAR_CMD)) { 1456 char *vpath, savec; 1457 /* 1458 * GCC stores string constants in read-only memory, but 1459 * Var_Subst will want to write this thing, so store it 1460 * in an array 1461 */ 1462 static char VPATH[] = "${VPATH}"; 1463 1464 (void)Var_Subst(VPATH, VAR_CMD, VARE_WANTRES, &vpath); 1465 /* TODO: handle errors */ 1466 path = vpath; 1467 do { 1468 /* skip to end of directory */ 1469 for (cp = path; *cp != ':' && *cp != '\0'; cp++) 1470 continue; 1471 /* Save terminator character so know when to stop */ 1472 savec = *cp; 1473 *cp = '\0'; 1474 /* Add directory to search path */ 1475 (void)Dir_AddDir(dirSearchPath, path); 1476 *cp = savec; 1477 path = cp + 1; 1478 } while (savec == ':'); 1479 free(vpath); 1480 } 1481 1482 /* 1483 * Now that all search paths have been read for suffixes et al, it's 1484 * time to add the default search path to their lists... 1485 */ 1486 Suff_DoPaths(); 1487 1488 /* 1489 * Propagate attributes through :: dependency lists. 1490 */ 1491 Targ_Propagate(); 1492 1493 /* print the initial graph, if the user requested it */ 1494 if (DEBUG(GRAPH1)) 1495 Targ_PrintGraph(1); 1496 1497 /* print the values of any variables requested by the user */ 1498 if (printVars) { 1499 doPrintVars(); 1500 outOfDate = FALSE; 1501 } else { 1502 outOfDate = runTargets(); 1503 } 1504 1505 #ifdef CLEANUP 1506 Lst_Free(variables); 1507 Lst_Free(makefiles); 1508 Lst_Destroy(create, free); 1509 #endif 1510 1511 /* print the graph now it's been processed if the user requested it */ 1512 if (DEBUG(GRAPH2)) 1513 Targ_PrintGraph(2); 1514 1515 Trace_Log(MAKEEND, 0); 1516 1517 if (enterFlagObj) 1518 printf("%s: Leaving directory `%s'\n", progname, objdir); 1519 if (enterFlag) 1520 printf("%s: Leaving directory `%s'\n", progname, curdir); 1521 1522 #ifdef USE_META 1523 meta_finish(); 1524 #endif 1525 Suff_End(); 1526 Targ_End(); 1527 Arch_End(); 1528 Var_End(); 1529 Parse_End(); 1530 Dir_End(); 1531 Job_End(); 1532 Trace_End(); 1533 1534 return outOfDate ? 1 : 0; 1535 } 1536 1537 /* Open and parse the given makefile, with all its side effects. 1538 * 1539 * Results: 1540 * 0 if ok. -1 if couldn't open file. 1541 */ 1542 static int 1543 ReadMakefile(const char *fname) 1544 { 1545 int fd; 1546 char *name, *path = NULL; 1547 1548 if (!strcmp(fname, "-")) { 1549 Parse_File(NULL /*stdin*/, -1); 1550 Var_Set("MAKEFILE", "", VAR_INTERNAL); 1551 } else { 1552 /* if we've chdir'd, rebuild the path name */ 1553 if (strcmp(curdir, objdir) && *fname != '/') { 1554 path = str_concat3(curdir, "/", fname); 1555 fd = open(path, O_RDONLY); 1556 if (fd != -1) { 1557 fname = path; 1558 goto found; 1559 } 1560 free(path); 1561 1562 /* If curdir failed, try objdir (ala .depend) */ 1563 path = str_concat3(objdir, "/", fname); 1564 fd = open(path, O_RDONLY); 1565 if (fd != -1) { 1566 fname = path; 1567 goto found; 1568 } 1569 } else { 1570 fd = open(fname, O_RDONLY); 1571 if (fd != -1) 1572 goto found; 1573 } 1574 /* look in -I and system include directories. */ 1575 name = Dir_FindFile(fname, parseIncPath); 1576 if (!name) 1577 name = Dir_FindFile(fname, 1578 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath); 1579 if (!name || (fd = open(name, O_RDONLY)) == -1) { 1580 free(name); 1581 free(path); 1582 return -1; 1583 } 1584 fname = name; 1585 /* 1586 * set the MAKEFILE variable desired by System V fans -- the 1587 * placement of the setting here means it gets set to the last 1588 * makefile specified, as it is set by SysV make. 1589 */ 1590 found: 1591 if (!doing_depend) 1592 Var_Set("MAKEFILE", fname, VAR_INTERNAL); 1593 Parse_File(fname, fd); 1594 } 1595 free(path); 1596 return 0; 1597 } 1598 1599 1600 1601 /*- 1602 * Cmd_Exec -- 1603 * Execute the command in cmd, and return the output of that command 1604 * in a string. In the output, newlines are replaced with spaces. 1605 * 1606 * Results: 1607 * A string containing the output of the command, or the empty string. 1608 * *errfmt returns a format string describing the command failure, 1609 * if any, using a single %s conversion specification. 1610 * 1611 * Side Effects: 1612 * The string must be freed by the caller. 1613 */ 1614 char * 1615 Cmd_Exec(const char *cmd, const char **errfmt) 1616 { 1617 const char *args[4]; /* Args for invoking the shell */ 1618 int fds[2]; /* Pipe streams */ 1619 int cpid; /* Child PID */ 1620 int pid; /* PID from wait() */ 1621 int status; /* command exit status */ 1622 Buffer buf; /* buffer to store the result */ 1623 ssize_t bytes_read; 1624 char *res; /* result */ 1625 size_t res_len; 1626 char *cp; 1627 int savederr; /* saved errno */ 1628 1629 *errfmt = NULL; 1630 1631 if (!shellName) 1632 Shell_Init(); 1633 /* 1634 * Set up arguments for shell 1635 */ 1636 args[0] = shellName; 1637 args[1] = "-c"; 1638 args[2] = cmd; 1639 args[3] = NULL; 1640 1641 /* 1642 * Open a pipe for fetching its output 1643 */ 1644 if (pipe(fds) == -1) { 1645 *errfmt = "Couldn't create pipe for \"%s\""; 1646 goto bad; 1647 } 1648 1649 /* 1650 * Fork 1651 */ 1652 switch (cpid = vFork()) { 1653 case 0: 1654 /* 1655 * Close input side of pipe 1656 */ 1657 (void)close(fds[0]); 1658 1659 /* 1660 * Duplicate the output stream to the shell's output, then 1661 * shut the extra thing down. Note we don't fetch the error 1662 * stream...why not? Why? 1663 */ 1664 (void)dup2(fds[1], 1); 1665 (void)close(fds[1]); 1666 1667 Var_ExportVars(); 1668 1669 (void)execv(shellPath, UNCONST(args)); 1670 _exit(1); 1671 /*NOTREACHED*/ 1672 1673 case -1: 1674 *errfmt = "Couldn't exec \"%s\""; 1675 goto bad; 1676 1677 default: 1678 /* 1679 * No need for the writing half 1680 */ 1681 (void)close(fds[1]); 1682 1683 savederr = 0; 1684 Buf_Init(&buf, 0); 1685 1686 do { 1687 char result[BUFSIZ]; 1688 bytes_read = read(fds[0], result, sizeof(result)); 1689 if (bytes_read > 0) 1690 Buf_AddBytes(&buf, result, (size_t)bytes_read); 1691 } 1692 while (bytes_read > 0 || (bytes_read == -1 && errno == EINTR)); 1693 if (bytes_read == -1) 1694 savederr = errno; 1695 1696 /* 1697 * Close the input side of the pipe. 1698 */ 1699 (void)close(fds[0]); 1700 1701 /* 1702 * Wait for the process to exit. 1703 */ 1704 while(((pid = waitpid(cpid, &status, 0)) != cpid) && (pid >= 0)) { 1705 JobReapChild(pid, status, FALSE); 1706 continue; 1707 } 1708 res_len = Buf_Len(&buf); 1709 res = Buf_Destroy(&buf, FALSE); 1710 1711 if (savederr != 0) 1712 *errfmt = "Couldn't read shell's output for \"%s\""; 1713 1714 if (WIFSIGNALED(status)) 1715 *errfmt = "\"%s\" exited on a signal"; 1716 else if (WEXITSTATUS(status) != 0) 1717 *errfmt = "\"%s\" returned non-zero status"; 1718 1719 /* Convert newlines to spaces. A final newline is just stripped */ 1720 if (res_len > 0 && res[res_len - 1] == '\n') 1721 res[res_len - 1] = '\0'; 1722 for (cp = res; *cp != '\0'; cp++) 1723 if (*cp == '\n') 1724 *cp = ' '; 1725 break; 1726 } 1727 return res; 1728 bad: 1729 return bmake_strdup(""); 1730 } 1731 1732 /*- 1733 * Error -- 1734 * Print an error message given its format. 1735 * 1736 * Results: 1737 * None. 1738 * 1739 * Side Effects: 1740 * The message is printed. 1741 */ 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 Tue Sep 23 14:10:03 GMT 2025