main.c revision 1.341
1 /* $NetBSD: main.c,v 1.341 2020/09/22 20:19:46 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 1.341 2020/09/22 20:19:46 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 void MainParseArgs(int, char **); 175 static int ReadMakefile(const char *); 176 static void usage(void) MAKE_ATTR_DEAD; 177 static void purge_cached_realpaths(void); 178 179 static Boolean ignorePWD; /* if we use -C, PWD is meaningless */ 180 static char objdir[MAXPATHLEN + 1]; /* where we chdir'ed to */ 181 char curdir[MAXPATHLEN + 1]; /* Startup directory */ 182 char *progname; /* the program name */ 183 char *makeDependfile; 184 pid_t myPid; 185 int makelevel; 186 187 FILE *debug_file; 188 189 Boolean forceJobs = FALSE; 190 191 extern SearchPath *parseIncPath; 192 193 /* 194 * For compatibility with the POSIX version of MAKEFLAGS that includes 195 * all the options with out -, convert flags to -f -l -a -g -s. 196 */ 197 static char * 198 explode(const char *flags) 199 { 200 size_t len; 201 char *nf, *st; 202 const char *f; 203 204 if (flags == NULL) 205 return NULL; 206 207 for (f = flags; *f; f++) 208 if (!ch_isalpha(*f)) 209 break; 210 211 if (*f) 212 return bmake_strdup(flags); 213 214 len = strlen(flags); 215 st = nf = bmake_malloc(len * 3 + 1); 216 while (*flags) { 217 *nf++ = '-'; 218 *nf++ = *flags++; 219 *nf++ = ' '; 220 } 221 *nf = '\0'; 222 return st; 223 } 224 225 static void 226 parse_debug_options(const char *argvalue) 227 { 228 const char *modules; 229 const char *mode; 230 char *fname; 231 int len; 232 233 for (modules = argvalue; *modules; ++modules) { 234 switch (*modules) { 235 case 'A': 236 debug = ~(0|DEBUG_LINT); 237 break; 238 case 'a': 239 debug |= DEBUG_ARCH; 240 break; 241 case 'C': 242 debug |= DEBUG_CWD; 243 break; 244 case 'c': 245 debug |= DEBUG_COND; 246 break; 247 case 'd': 248 debug |= DEBUG_DIR; 249 break; 250 case 'e': 251 debug |= DEBUG_ERROR; 252 break; 253 case 'f': 254 debug |= DEBUG_FOR; 255 break; 256 case 'g': 257 if (modules[1] == '1') { 258 debug |= DEBUG_GRAPH1; 259 ++modules; 260 } 261 else if (modules[1] == '2') { 262 debug |= DEBUG_GRAPH2; 263 ++modules; 264 } 265 else if (modules[1] == '3') { 266 debug |= DEBUG_GRAPH3; 267 ++modules; 268 } 269 break; 270 case 'h': 271 debug |= DEBUG_HASH; 272 break; 273 case 'j': 274 debug |= DEBUG_JOB; 275 break; 276 case 'L': 277 debug |= DEBUG_LINT; 278 break; 279 case 'l': 280 debug |= DEBUG_LOUD; 281 break; 282 case 'M': 283 debug |= DEBUG_META; 284 break; 285 case 'm': 286 debug |= DEBUG_MAKE; 287 break; 288 case 'n': 289 debug |= DEBUG_SCRIPT; 290 break; 291 case 'p': 292 debug |= DEBUG_PARSE; 293 break; 294 case 's': 295 debug |= DEBUG_SUFF; 296 break; 297 case 't': 298 debug |= DEBUG_TARG; 299 break; 300 case 'V': 301 debugVflag = TRUE; 302 break; 303 case 'v': 304 debug |= DEBUG_VAR; 305 break; 306 case 'x': 307 debug |= DEBUG_SHELL; 308 break; 309 case 'F': 310 if (debug_file != stdout && debug_file != stderr) 311 fclose(debug_file); 312 if (*++modules == '+') { 313 modules++; 314 mode = "a"; 315 } else 316 mode = "w"; 317 if (strcmp(modules, "stdout") == 0) { 318 debug_file = stdout; 319 goto debug_setbuf; 320 } 321 if (strcmp(modules, "stderr") == 0) { 322 debug_file = stderr; 323 goto debug_setbuf; 324 } 325 len = strlen(modules); 326 fname = bmake_malloc(len + 20); 327 memcpy(fname, modules, len + 1); 328 /* Let the filename be modified by the pid */ 329 if (strcmp(fname + len - 3, ".%d") == 0) 330 snprintf(fname + len - 2, 20, "%d", getpid()); 331 debug_file = fopen(fname, mode); 332 if (!debug_file) { 333 fprintf(stderr, "Cannot open debug file %s\n", 334 fname); 335 usage(); 336 } 337 free(fname); 338 goto debug_setbuf; 339 default: 340 (void)fprintf(stderr, 341 "%s: illegal argument to d option -- %c\n", 342 progname, *modules); 343 usage(); 344 } 345 } 346 debug_setbuf: 347 /* 348 * Make the debug_file unbuffered, and make 349 * stdout line buffered (unless debugfile == stdout). 350 */ 351 setvbuf(debug_file, NULL, _IONBF, 0); 352 if (debug_file != stdout) { 353 setvbuf(stdout, NULL, _IOLBF, 0); 354 } 355 } 356 357 /* 358 * does path contain any relative components 359 */ 360 static Boolean 361 is_relpath(const char *path) 362 { 363 const char *cp; 364 365 if (path[0] != '/') 366 return TRUE; 367 cp = path; 368 while ((cp = strstr(cp, "/.")) != NULL) { 369 cp += 2; 370 if (cp[0] == '/' || cp[0] == '\0') 371 return TRUE; 372 else if (cp[0] == '.') { 373 if (cp[1] == '/' || cp[1] == '\0') 374 return TRUE; 375 } 376 } 377 return FALSE; 378 } 379 380 /*- 381 * MainParseArgs -- 382 * Parse a given argument vector. Called from main() and from 383 * Main_ParseArgLine() when the .MAKEFLAGS target is used. 384 * 385 * XXX: Deal with command line overriding .MAKEFLAGS in makefile 386 * 387 * Results: 388 * None 389 * 390 * Side Effects: 391 * Various global and local flags will be set depending on the flags 392 * given 393 */ 394 static void 395 MainParseArgs(int argc, char **argv) 396 { 397 char *p; 398 char c = '?'; 399 int arginc; 400 char *argvalue; 401 const char *getopt_def; 402 struct stat sa, sb; 403 char *optscan; 404 Boolean inOption, dashDash = FALSE; 405 char found_path[MAXPATHLEN + 1]; /* for searching for sys.mk */ 406 407 #define OPTFLAGS "BC:D:I:J:NST:V:WXd:ef:ij:km:nqrstv:w" 408 /* Can't actually use getopt(3) because rescanning is not portable */ 409 410 getopt_def = OPTFLAGS; 411 rearg: 412 inOption = FALSE; 413 optscan = NULL; 414 while(argc > 1) { 415 char *getopt_spec; 416 if(!inOption) 417 optscan = argv[1]; 418 c = *optscan++; 419 arginc = 0; 420 if(inOption) { 421 if(c == '\0') { 422 ++argv; 423 --argc; 424 inOption = FALSE; 425 continue; 426 } 427 } else { 428 if (c != '-' || dashDash) 429 break; 430 inOption = TRUE; 431 c = *optscan++; 432 } 433 /* '-' found at some earlier point */ 434 getopt_spec = strchr(getopt_def, c); 435 if(c != '\0' && getopt_spec != NULL && getopt_spec[1] == ':') { 436 /* -<something> found, and <something> should have an arg */ 437 inOption = FALSE; 438 arginc = 1; 439 argvalue = optscan; 440 if(*argvalue == '\0') { 441 if (argc < 3) 442 goto noarg; 443 argvalue = argv[2]; 444 arginc = 2; 445 } 446 } else { 447 argvalue = NULL; 448 } 449 switch(c) { 450 case '\0': 451 arginc = 1; 452 inOption = FALSE; 453 break; 454 case 'B': 455 compatMake = TRUE; 456 Var_Append(MAKEFLAGS, "-B", VAR_GLOBAL); 457 Var_Set(MAKE_MODE, "compat", VAR_GLOBAL); 458 break; 459 case 'C': 460 if (chdir(argvalue) == -1) { 461 (void)fprintf(stderr, 462 "%s: chdir %s: %s\n", 463 progname, argvalue, 464 strerror(errno)); 465 exit(1); 466 } 467 if (getcwd(curdir, MAXPATHLEN) == NULL) { 468 (void)fprintf(stderr, "%s: %s.\n", progname, strerror(errno)); 469 exit(2); 470 } 471 if (!is_relpath(argvalue) && 472 stat(argvalue, &sa) != -1 && 473 stat(curdir, &sb) != -1 && 474 sa.st_ino == sb.st_ino && 475 sa.st_dev == sb.st_dev) 476 strncpy(curdir, argvalue, MAXPATHLEN); 477 ignorePWD = TRUE; 478 break; 479 case 'D': 480 if (argvalue == NULL || argvalue[0] == 0) goto noarg; 481 Var_Set(argvalue, "1", VAR_GLOBAL); 482 Var_Append(MAKEFLAGS, "-D", VAR_GLOBAL); 483 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 484 break; 485 case 'I': 486 if (argvalue == NULL) goto noarg; 487 Parse_AddIncludeDir(argvalue); 488 Var_Append(MAKEFLAGS, "-I", VAR_GLOBAL); 489 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 490 break; 491 case 'J': 492 if (argvalue == NULL) goto noarg; 493 if (sscanf(argvalue, "%d,%d", &jp_0, &jp_1) != 2) { 494 (void)fprintf(stderr, 495 "%s: internal error -- J option malformed (%s)\n", 496 progname, argvalue); 497 usage(); 498 } 499 if ((fcntl(jp_0, F_GETFD, 0) < 0) || 500 (fcntl(jp_1, F_GETFD, 0) < 0)) { 501 #if 0 502 (void)fprintf(stderr, 503 "%s: ###### warning -- J descriptors were closed!\n", 504 progname); 505 exit(2); 506 #endif 507 jp_0 = -1; 508 jp_1 = -1; 509 compatMake = TRUE; 510 } else { 511 Var_Append(MAKEFLAGS, "-J", VAR_GLOBAL); 512 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 513 } 514 break; 515 case 'N': 516 noExecute = TRUE; 517 noRecursiveExecute = TRUE; 518 Var_Append(MAKEFLAGS, "-N", VAR_GLOBAL); 519 break; 520 case 'S': 521 keepgoing = FALSE; 522 Var_Append(MAKEFLAGS, "-S", VAR_GLOBAL); 523 break; 524 case 'T': 525 if (argvalue == NULL) goto noarg; 526 tracefile = bmake_strdup(argvalue); 527 Var_Append(MAKEFLAGS, "-T", VAR_GLOBAL); 528 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 529 break; 530 case 'V': 531 case 'v': 532 if (argvalue == NULL) goto noarg; 533 printVars = c == 'v' ? EXPAND_VARS : COMPAT_VARS; 534 Lst_Append(variables, argvalue); 535 Var_Append(MAKEFLAGS, "-V", VAR_GLOBAL); 536 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 537 break; 538 case 'W': 539 parseWarnFatal = TRUE; 540 break; 541 case 'X': 542 varNoExportEnv = TRUE; 543 Var_Append(MAKEFLAGS, "-X", VAR_GLOBAL); 544 break; 545 case 'd': 546 if (argvalue == NULL) goto noarg; 547 /* If '-d-opts' don't pass to children */ 548 if (argvalue[0] == '-') 549 argvalue++; 550 else { 551 Var_Append(MAKEFLAGS, "-d", VAR_GLOBAL); 552 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 553 } 554 parse_debug_options(argvalue); 555 break; 556 case 'e': 557 checkEnvFirst = TRUE; 558 Var_Append(MAKEFLAGS, "-e", VAR_GLOBAL); 559 break; 560 case 'f': 561 if (argvalue == NULL) goto noarg; 562 Lst_Append(makefiles, argvalue); 563 break; 564 case 'i': 565 ignoreErrors = TRUE; 566 Var_Append(MAKEFLAGS, "-i", VAR_GLOBAL); 567 break; 568 case 'j': 569 if (argvalue == NULL) goto noarg; 570 forceJobs = TRUE; 571 maxJobs = strtol(argvalue, &p, 0); 572 if (*p != '\0' || maxJobs < 1) { 573 (void)fprintf(stderr, "%s: illegal argument to -j -- must be positive integer!\n", 574 progname); 575 exit(1); 576 } 577 Var_Append(MAKEFLAGS, "-j", VAR_GLOBAL); 578 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 579 Var_Set(".MAKE.JOBS", argvalue, VAR_GLOBAL); 580 maxJobTokens = maxJobs; 581 break; 582 case 'k': 583 keepgoing = TRUE; 584 Var_Append(MAKEFLAGS, "-k", VAR_GLOBAL); 585 break; 586 case 'm': 587 if (argvalue == NULL) goto noarg; 588 /* look for magic parent directory search string */ 589 if (strncmp(".../", argvalue, 4) == 0) { 590 if (!Dir_FindHereOrAbove(curdir, argvalue+4, 591 found_path, sizeof(found_path))) 592 break; /* nothing doing */ 593 (void)Dir_AddDir(sysIncPath, found_path); 594 } else { 595 (void)Dir_AddDir(sysIncPath, argvalue); 596 } 597 Var_Append(MAKEFLAGS, "-m", VAR_GLOBAL); 598 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 599 break; 600 case 'n': 601 noExecute = TRUE; 602 Var_Append(MAKEFLAGS, "-n", VAR_GLOBAL); 603 break; 604 case 'q': 605 queryFlag = TRUE; 606 /* Kind of nonsensical, wot? */ 607 Var_Append(MAKEFLAGS, "-q", VAR_GLOBAL); 608 break; 609 case 'r': 610 noBuiltins = TRUE; 611 Var_Append(MAKEFLAGS, "-r", VAR_GLOBAL); 612 break; 613 case 's': 614 beSilent = TRUE; 615 Var_Append(MAKEFLAGS, "-s", VAR_GLOBAL); 616 break; 617 case 't': 618 touchFlag = TRUE; 619 Var_Append(MAKEFLAGS, "-t", VAR_GLOBAL); 620 break; 621 case 'w': 622 enterFlag = TRUE; 623 Var_Append(MAKEFLAGS, "-w", VAR_GLOBAL); 624 break; 625 case '-': 626 dashDash = TRUE; 627 break; 628 default: 629 case '?': 630 usage(); 631 } 632 argv += arginc; 633 argc -= arginc; 634 } 635 636 oldVars = TRUE; 637 638 /* 639 * See if the rest of the arguments are variable assignments and 640 * perform them if so. Else take them to be targets and stuff them 641 * on the end of the "create" list. 642 */ 643 for (; argc > 1; ++argv, --argc) 644 if (Parse_IsVar(argv[1])) { 645 Parse_DoVar(argv[1], VAR_CMD); 646 } else { 647 if (!*argv[1]) 648 Punt("illegal (null) argument."); 649 if (*argv[1] == '-' && !dashDash) 650 goto rearg; 651 Lst_Append(create, bmake_strdup(argv[1])); 652 } 653 654 return; 655 noarg: 656 (void)fprintf(stderr, "%s: option requires an argument -- %c\n", 657 progname, c); 658 usage(); 659 } 660 661 /*- 662 * Main_ParseArgLine -- 663 * Used by the parse module when a .MFLAGS or .MAKEFLAGS target 664 * is encountered and by main() when reading the .MAKEFLAGS envariable. 665 * Takes a line of arguments and breaks it into its 666 * component words and passes those words and the number of them to the 667 * MainParseArgs function. 668 * The line should have all its leading whitespace removed. 669 * 670 * Input: 671 * line Line to fracture 672 * 673 * Results: 674 * None 675 * 676 * Side Effects: 677 * Only those that come from the various arguments. 678 */ 679 void 680 Main_ParseArgLine(const char *line) 681 { 682 Words words; 683 char *p1; 684 const char *argv0 = Var_Value(".MAKE", VAR_GLOBAL, &p1); 685 char *buf; 686 687 if (line == NULL) 688 return; 689 for (; *line == ' '; ++line) 690 continue; 691 if (!*line) 692 return; 693 694 buf = str_concat3(argv0, " ", line); 695 free(p1); 696 697 words = Str_Words(buf, TRUE); 698 if (words.words == NULL) { 699 Error("Unterminated quoted string [%s]", buf); 700 free(buf); 701 return; 702 } 703 free(buf); 704 MainParseArgs((int)words.len, words.words); 705 706 Words_Free(words); 707 } 708 709 Boolean 710 Main_SetObjdir(const char *fmt, ...) 711 { 712 struct stat sb; 713 char *path; 714 char buf[MAXPATHLEN + 1]; 715 char buf2[MAXPATHLEN + 1]; 716 Boolean rc = FALSE; 717 va_list ap; 718 719 va_start(ap, fmt); 720 vsnprintf(path = buf, MAXPATHLEN, fmt, ap); 721 va_end(ap); 722 723 if (path[0] != '/') { 724 snprintf(buf2, MAXPATHLEN, "%s/%s", curdir, path); 725 path = buf2; 726 } 727 728 /* look for the directory and try to chdir there */ 729 if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) { 730 if (chdir(path)) { 731 (void)fprintf(stderr, "make warning: %s: %s.\n", 732 path, strerror(errno)); 733 } else { 734 snprintf(objdir, sizeof objdir, "%s", path); 735 Var_Set(".OBJDIR", objdir, VAR_GLOBAL); 736 setenv("PWD", objdir, 1); 737 Dir_InitDot(); 738 purge_cached_realpaths(); 739 rc = TRUE; 740 if (enterFlag && strcmp(objdir, curdir) != 0) 741 enterFlagObj = TRUE; 742 } 743 } 744 745 return rc; 746 } 747 748 static Boolean 749 Main_SetVarObjdir(const char *var, const char *suffix) 750 { 751 char *path_freeIt; 752 const char *path = Var_Value(var, VAR_CMD, &path_freeIt); 753 const char *xpath; 754 char *xpath_freeIt; 755 756 if (path == NULL || path[0] == '\0') { 757 bmake_free(path_freeIt); 758 return FALSE; 759 } 760 761 /* expand variable substitutions */ 762 xpath = path; 763 xpath_freeIt = NULL; 764 if (strchr(path, '$') != 0) { 765 (void)Var_Subst(path, VAR_GLOBAL, VARE_WANTRES, &xpath_freeIt); 766 /* TODO: handle errors */ 767 xpath = xpath_freeIt; 768 } 769 770 (void)Main_SetObjdir("%s%s", xpath, suffix); 771 772 bmake_free(xpath_freeIt); 773 bmake_free(path_freeIt); 774 return TRUE; 775 } 776 777 /* Read and parse the makefile. 778 * Return TRUE if reading the makefile succeeded, for Lst_Find. */ 779 static Boolean 780 ReadMakefileSucceeded(const void *fname, const void *unused) 781 { 782 return ReadMakefile(fname) == 0; 783 } 784 785 /* Read and parse the makefile. 786 * Return TRUE if reading the makefile failed, for Lst_Find. */ 787 static Boolean 788 ReadMakefileFailed(const void *fname, const void *unused) 789 { 790 return ReadMakefile(fname) != 0; 791 } 792 793 int 794 str2Lst_Append(StringList *lp, char *str, const char *sep) 795 { 796 char *cp; 797 int n; 798 799 if (!sep) 800 sep = " \t"; 801 802 for (n = 0, cp = strtok(str, sep); cp; cp = strtok(NULL, sep)) { 803 Lst_Append(lp, cp); 804 n++; 805 } 806 return n; 807 } 808 809 #ifdef SIGINFO 810 /*ARGSUSED*/ 811 static void 812 siginfo(int signo MAKE_ATTR_UNUSED) 813 { 814 char dir[MAXPATHLEN]; 815 char str[2 * MAXPATHLEN]; 816 int len; 817 if (getcwd(dir, sizeof(dir)) == NULL) 818 return; 819 len = snprintf(str, sizeof(str), "%s: Working in: %s\n", progname, dir); 820 if (len > 0) 821 (void)write(STDERR_FILENO, str, (size_t)len); 822 } 823 #endif 824 825 /* 826 * Allow makefiles some control over the mode we run in. 827 */ 828 void 829 MakeMode(const char *mode) 830 { 831 char *mode_freeIt = NULL; 832 833 if (mode == NULL) { 834 (void)Var_Subst("${" MAKE_MODE ":tl}", 835 VAR_GLOBAL, VARE_WANTRES, &mode_freeIt); 836 /* TODO: handle errors */ 837 mode = mode_freeIt; 838 } 839 840 if (mode[0] != '\0') { 841 if (strstr(mode, "compat")) { 842 compatMake = TRUE; 843 forceJobs = FALSE; 844 } 845 #if USE_META 846 if (strstr(mode, "meta")) 847 meta_mode_init(mode); 848 #endif 849 } 850 851 free(mode_freeIt); 852 } 853 854 static void 855 doPrintVars(void) 856 { 857 StringListNode *ln; 858 Boolean expandVars; 859 860 if (printVars == EXPAND_VARS) 861 expandVars = TRUE; 862 else if (debugVflag) 863 expandVars = FALSE; 864 else 865 expandVars = getBoolean(".MAKE.EXPAND_VARIABLES", FALSE); 866 867 for (ln = Lst_First(variables); ln != NULL; ln = LstNode_Next(ln)) { 868 char *var = LstNode_Datum(ln); 869 const char *value; 870 char *p1; 871 872 if (strchr(var, '$')) { 873 (void)Var_Subst(var, VAR_GLOBAL, VARE_WANTRES, &p1); 874 /* TODO: handle errors */ 875 value = p1; 876 } else if (expandVars) { 877 char *expr = str_concat3("${", var, "}"); 878 (void)Var_Subst(expr, VAR_GLOBAL, VARE_WANTRES, &p1); 879 /* TODO: handle errors */ 880 value = p1; 881 free(expr); 882 } else { 883 value = Var_Value(var, VAR_GLOBAL, &p1); 884 } 885 printf("%s\n", value ? value : ""); 886 bmake_free(p1); 887 } 888 } 889 890 static Boolean 891 runTargets(void) 892 { 893 GNodeList *targs; /* target nodes to create -- passed to Make_Init */ 894 Boolean outOfDate; /* FALSE if all targets up to date */ 895 896 /* 897 * Have now read the entire graph and need to make a list of 898 * targets to create. If none was given on the command line, 899 * we consult the parsing module to find the main target(s) 900 * to create. 901 */ 902 if (Lst_IsEmpty(create)) 903 targs = Parse_MainName(); 904 else 905 targs = Targ_FindList(create, TARG_CREATE); 906 907 if (!compatMake) { 908 /* 909 * Initialize job module before traversing the graph 910 * now that any .BEGIN and .END targets have been read. 911 * This is done only if the -q flag wasn't given 912 * (to prevent the .BEGIN from being executed should 913 * it exist). 914 */ 915 if (!queryFlag) { 916 Job_Init(); 917 jobsRunning = TRUE; 918 } 919 920 /* Traverse the graph, checking on all the targets */ 921 outOfDate = Make_Run(targs); 922 } else { 923 /* 924 * Compat_Init will take care of creating all the 925 * targets as well as initializing the module. 926 */ 927 Compat_Run(targs); 928 outOfDate = FALSE; 929 } 930 Lst_Free(targs); 931 return outOfDate; 932 } 933 934 /*- 935 * main -- 936 * The main function, for obvious reasons. Initializes variables 937 * and a few modules, then parses the arguments give it in the 938 * environment and on the command line. Reads the system makefile 939 * followed by either Makefile, makefile or the file given by the 940 * -f argument. Sets the .MAKEFLAGS PMake variable based on all the 941 * flags it has received by then uses either the Make or the Compat 942 * module to create the initial list of targets. 943 * 944 * Results: 945 * If -q was given, exits -1 if anything was out-of-date. Else it exits 946 * 0. 947 * 948 * Side Effects: 949 * The program exits when done. Targets are created. etc. etc. etc. 950 */ 951 int 952 main(int argc, char **argv) 953 { 954 Boolean outOfDate; /* FALSE if all targets up to date */ 955 struct stat sb, sa; 956 char *p1, *path; 957 char mdpath[MAXPATHLEN]; 958 const char *machine = getenv("MACHINE"); 959 const char *machine_arch = getenv("MACHINE_ARCH"); 960 char *syspath = getenv("MAKESYSPATH"); 961 StringList *sysMkPath; /* Path of sys.mk */ 962 char *cp = NULL, *start; 963 /* avoid faults on read-only strings */ 964 static char defsyspath[] = _PATH_DEFSYSPATH; 965 char found_path[MAXPATHLEN + 1]; /* for searching for sys.mk */ 966 struct timeval rightnow; /* to initialize random seed */ 967 struct utsname utsname; 968 969 /* default to writing debug to stderr */ 970 debug_file = stderr; 971 972 #ifdef SIGINFO 973 (void)bmake_signal(SIGINFO, siginfo); 974 #endif 975 /* 976 * Set the seed to produce a different random sequence 977 * on each program execution. 978 */ 979 gettimeofday(&rightnow, NULL); 980 srandom(rightnow.tv_sec + rightnow.tv_usec); 981 982 if ((progname = strrchr(argv[0], '/')) != NULL) 983 progname++; 984 else 985 progname = argv[0]; 986 #if defined(MAKE_NATIVE) || (defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE)) 987 /* 988 * get rid of resource limit on file descriptors 989 */ 990 { 991 struct rlimit rl; 992 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 && 993 rl.rlim_cur != rl.rlim_max) { 994 rl.rlim_cur = rl.rlim_max; 995 (void)setrlimit(RLIMIT_NOFILE, &rl); 996 } 997 } 998 #endif 999 1000 if (uname(&utsname) == -1) { 1001 (void)fprintf(stderr, "%s: uname failed (%s).\n", progname, 1002 strerror(errno)); 1003 exit(2); 1004 } 1005 1006 /* 1007 * Get the name of this type of MACHINE from utsname 1008 * so we can share an executable for similar machines. 1009 * (i.e. m68k: amiga hp300, mac68k, sun3, ...) 1010 * 1011 * Note that both MACHINE and MACHINE_ARCH are decided at 1012 * run-time. 1013 */ 1014 if (!machine) { 1015 #ifdef MAKE_NATIVE 1016 machine = utsname.machine; 1017 #else 1018 #ifdef MAKE_MACHINE 1019 machine = MAKE_MACHINE; 1020 #else 1021 machine = "unknown"; 1022 #endif 1023 #endif 1024 } 1025 1026 if (!machine_arch) { 1027 #ifdef MAKE_NATIVE 1028 static char machine_arch_buf[sizeof(utsname.machine)]; 1029 const int mib[2] = { CTL_HW, HW_MACHINE_ARCH }; 1030 size_t len = sizeof(machine_arch_buf); 1031 1032 if (sysctl(mib, __arraycount(mib), machine_arch_buf, 1033 &len, NULL, 0) < 0) { 1034 (void)fprintf(stderr, "%s: sysctl failed (%s).\n", progname, 1035 strerror(errno)); 1036 exit(2); 1037 } 1038 1039 machine_arch = machine_arch_buf; 1040 #else 1041 #ifndef MACHINE_ARCH 1042 #ifdef MAKE_MACHINE_ARCH 1043 machine_arch = MAKE_MACHINE_ARCH; 1044 #else 1045 machine_arch = "unknown"; 1046 #endif 1047 #else 1048 machine_arch = MACHINE_ARCH; 1049 #endif 1050 #endif 1051 } 1052 1053 myPid = getpid(); /* remember this for vFork() */ 1054 1055 /* 1056 * Just in case MAKEOBJDIR wants us to do something tricky. 1057 */ 1058 Var_Init(); /* Initialize the lists of variables for 1059 * parsing arguments */ 1060 Var_Set(".MAKE.OS", utsname.sysname, VAR_GLOBAL); 1061 Var_Set("MACHINE", machine, VAR_GLOBAL); 1062 Var_Set("MACHINE_ARCH", machine_arch, VAR_GLOBAL); 1063 #ifdef MAKE_VERSION 1064 Var_Set("MAKE_VERSION", MAKE_VERSION, VAR_GLOBAL); 1065 #endif 1066 Var_Set(".newline", "\n", VAR_GLOBAL); /* handy for :@ loops */ 1067 /* 1068 * This is the traditional preference for makefiles. 1069 */ 1070 #ifndef MAKEFILE_PREFERENCE_LIST 1071 # define MAKEFILE_PREFERENCE_LIST "makefile Makefile" 1072 #endif 1073 Var_Set(MAKEFILE_PREFERENCE, MAKEFILE_PREFERENCE_LIST, 1074 VAR_GLOBAL); 1075 Var_Set(MAKE_DEPENDFILE, ".depend", VAR_GLOBAL); 1076 1077 create = Lst_Init(); 1078 makefiles = Lst_Init(); 1079 printVars = 0; 1080 debugVflag = FALSE; 1081 variables = Lst_Init(); 1082 beSilent = FALSE; /* Print commands as executed */ 1083 ignoreErrors = FALSE; /* Pay attention to non-zero returns */ 1084 noExecute = FALSE; /* Execute all commands */ 1085 noRecursiveExecute = FALSE; /* Execute all .MAKE targets */ 1086 keepgoing = FALSE; /* Stop on error */ 1087 allPrecious = FALSE; /* Remove targets when interrupted */ 1088 deleteOnError = FALSE; /* Historical default behavior */ 1089 queryFlag = FALSE; /* This is not just a check-run */ 1090 noBuiltins = FALSE; /* Read the built-in rules */ 1091 touchFlag = FALSE; /* Actually update targets */ 1092 debug = 0; /* No debug verbosity, please. */ 1093 jobsRunning = FALSE; 1094 1095 maxJobs = DEFMAXLOCAL; /* Set default local max concurrency */ 1096 maxJobTokens = maxJobs; 1097 compatMake = FALSE; /* No compat mode */ 1098 ignorePWD = FALSE; 1099 1100 /* 1101 * Initialize the parsing, directory and variable modules to prepare 1102 * for the reading of inclusion paths and variable settings on the 1103 * command line 1104 */ 1105 1106 /* 1107 * Initialize various variables. 1108 * MAKE also gets this name, for compatibility 1109 * .MAKEFLAGS gets set to the empty string just in case. 1110 * MFLAGS also gets initialized empty, for compatibility. 1111 */ 1112 Parse_Init(); 1113 if (argv[0][0] == '/' || strchr(argv[0], '/') == NULL) { 1114 /* 1115 * Leave alone if it is an absolute path, or if it does 1116 * not contain a '/' in which case we need to find it in 1117 * the path, like execvp(3) and the shells do. 1118 */ 1119 p1 = argv[0]; 1120 } else { 1121 /* 1122 * A relative path, canonicalize it. 1123 */ 1124 p1 = cached_realpath(argv[0], mdpath); 1125 if (!p1 || *p1 != '/' || stat(p1, &sb) < 0) { 1126 p1 = argv[0]; /* realpath failed */ 1127 } 1128 } 1129 Var_Set("MAKE", p1, VAR_GLOBAL); 1130 Var_Set(".MAKE", p1, VAR_GLOBAL); 1131 Var_Set(MAKEFLAGS, "", VAR_GLOBAL); 1132 Var_Set(MAKEOVERRIDES, "", VAR_GLOBAL); 1133 Var_Set("MFLAGS", "", VAR_GLOBAL); 1134 Var_Set(".ALLTARGETS", "", VAR_GLOBAL); 1135 /* some makefiles need to know this */ 1136 Var_Set(MAKE_LEVEL ".ENV", MAKE_LEVEL_ENV, VAR_CMD); 1137 1138 /* 1139 * Set some other useful macros 1140 */ 1141 { 1142 char tmp[64], *ep; 1143 1144 makelevel = ((ep = getenv(MAKE_LEVEL_ENV)) && *ep) ? atoi(ep) : 0; 1145 if (makelevel < 0) 1146 makelevel = 0; 1147 snprintf(tmp, sizeof(tmp), "%d", makelevel); 1148 Var_Set(MAKE_LEVEL, tmp, VAR_GLOBAL); 1149 snprintf(tmp, sizeof(tmp), "%u", myPid); 1150 Var_Set(".MAKE.PID", tmp, VAR_GLOBAL); 1151 snprintf(tmp, sizeof(tmp), "%u", getppid()); 1152 Var_Set(".MAKE.PPID", tmp, VAR_GLOBAL); 1153 } 1154 if (makelevel > 0) { 1155 char pn[1024]; 1156 snprintf(pn, sizeof(pn), "%s[%d]", progname, makelevel); 1157 progname = bmake_strdup(pn); 1158 } 1159 1160 #ifdef USE_META 1161 meta_init(); 1162 #endif 1163 Dir_Init(); 1164 1165 /* 1166 * First snag any flags out of the MAKE environment variable. 1167 * (Note this is *not* MAKEFLAGS since /bin/make uses that and it's 1168 * in a different format). 1169 */ 1170 #ifdef POSIX 1171 p1 = explode(getenv("MAKEFLAGS")); 1172 Main_ParseArgLine(p1); 1173 free(p1); 1174 #else 1175 Main_ParseArgLine(getenv("MAKE")); 1176 #endif 1177 1178 /* 1179 * Find where we are (now). 1180 * We take care of PWD for the automounter below... 1181 */ 1182 if (getcwd(curdir, MAXPATHLEN) == NULL) { 1183 (void)fprintf(stderr, "%s: getcwd: %s.\n", 1184 progname, strerror(errno)); 1185 exit(2); 1186 } 1187 1188 MainParseArgs(argc, argv); 1189 1190 if (enterFlag) 1191 printf("%s: Entering directory `%s'\n", progname, curdir); 1192 1193 /* 1194 * Verify that cwd is sane. 1195 */ 1196 if (stat(curdir, &sa) == -1) { 1197 (void)fprintf(stderr, "%s: %s: %s.\n", 1198 progname, curdir, strerror(errno)); 1199 exit(2); 1200 } 1201 1202 /* 1203 * All this code is so that we know where we are when we start up 1204 * on a different machine with pmake. 1205 * Overriding getcwd() with $PWD totally breaks MAKEOBJDIRPREFIX 1206 * since the value of curdir can vary depending on how we got 1207 * here. Ie sitting at a shell prompt (shell that provides $PWD) 1208 * or via subdir.mk in which case its likely a shell which does 1209 * not provide it. 1210 * So, to stop it breaking this case only, we ignore PWD if 1211 * MAKEOBJDIRPREFIX is set or MAKEOBJDIR contains a transform. 1212 */ 1213 #ifndef NO_PWD_OVERRIDE 1214 if (!ignorePWD) { 1215 char *pwd, *ptmp1 = NULL, *ptmp2 = NULL; 1216 1217 if ((pwd = getenv("PWD")) != NULL && 1218 Var_Value("MAKEOBJDIRPREFIX", VAR_CMD, &ptmp1) == NULL) { 1219 const char *makeobjdir = Var_Value("MAKEOBJDIR", 1220 VAR_CMD, &ptmp2); 1221 1222 if (makeobjdir == NULL || !strchr(makeobjdir, '$')) { 1223 if (stat(pwd, &sb) == 0 && 1224 sa.st_ino == sb.st_ino && 1225 sa.st_dev == sb.st_dev) 1226 (void)strncpy(curdir, pwd, MAXPATHLEN); 1227 } 1228 } 1229 bmake_free(ptmp1); 1230 bmake_free(ptmp2); 1231 } 1232 #endif 1233 Var_Set(".CURDIR", curdir, VAR_GLOBAL); 1234 1235 /* 1236 * Find the .OBJDIR. If MAKEOBJDIRPREFIX, or failing that, 1237 * MAKEOBJDIR is set in the environment, try only that value 1238 * and fall back to .CURDIR if it does not exist. 1239 * 1240 * Otherwise, try _PATH_OBJDIR.MACHINE-MACHINE_ARCH, _PATH_OBJDIR.MACHINE, 1241 * and * finally _PATH_OBJDIRPREFIX`pwd`, in that order. If none 1242 * of these paths exist, just use .CURDIR. 1243 */ 1244 Dir_InitDir(curdir); 1245 (void)Main_SetObjdir("%s", curdir); 1246 1247 if (!Main_SetVarObjdir("MAKEOBJDIRPREFIX", curdir) && 1248 !Main_SetVarObjdir("MAKEOBJDIR", "") && 1249 !Main_SetObjdir("%s.%s-%s", _PATH_OBJDIR, machine, machine_arch) && 1250 !Main_SetObjdir("%s.%s", _PATH_OBJDIR, machine) && 1251 !Main_SetObjdir("%s", _PATH_OBJDIR)) 1252 (void)Main_SetObjdir("%s%s", _PATH_OBJDIRPREFIX, curdir); 1253 1254 /* 1255 * Initialize archive, target and suffix modules in preparation for 1256 * parsing the makefile(s) 1257 */ 1258 Arch_Init(); 1259 Targ_Init(); 1260 Suff_Init(); 1261 Trace_Init(tracefile); 1262 1263 DEFAULT = NULL; 1264 (void)time(&now); 1265 1266 Trace_Log(MAKESTART, NULL); 1267 1268 /* 1269 * Set up the .TARGETS variable to contain the list of targets to be 1270 * created. If none specified, make the variable empty -- the parser 1271 * will fill the thing in with the default or .MAIN target. 1272 */ 1273 if (!Lst_IsEmpty(create)) { 1274 StringListNode *ln; 1275 1276 for (ln = Lst_First(create); ln != NULL; ln = LstNode_Next(ln)) { 1277 char *name = LstNode_Datum(ln); 1278 Var_Append(".TARGETS", name, VAR_GLOBAL); 1279 } 1280 } else 1281 Var_Set(".TARGETS", "", VAR_GLOBAL); 1282 1283 1284 /* 1285 * If no user-supplied system path was given (through the -m option) 1286 * add the directories from the DEFSYSPATH (more than one may be given 1287 * as dir1:...:dirn) to the system include path. 1288 */ 1289 /* XXX: mismatch: the -m option sets sysIncPath, not syspath */ 1290 if (syspath == NULL || syspath[0] == '\0') 1291 syspath = defsyspath; 1292 else 1293 syspath = bmake_strdup(syspath); 1294 1295 for (start = syspath; *start != '\0'; start = cp) { 1296 for (cp = start; *cp != '\0' && *cp != ':'; cp++) 1297 continue; 1298 if (*cp == ':') { 1299 *cp++ = '\0'; 1300 } 1301 /* look for magic parent directory search string */ 1302 if (strncmp(".../", start, 4) != 0) { 1303 (void)Dir_AddDir(defIncPath, start); 1304 } else { 1305 if (Dir_FindHereOrAbove(curdir, start+4, 1306 found_path, sizeof(found_path))) { 1307 (void)Dir_AddDir(defIncPath, found_path); 1308 } 1309 } 1310 } 1311 if (syspath != defsyspath) 1312 free(syspath); 1313 1314 /* 1315 * Read in the built-in rules first, followed by the specified 1316 * makefiles, or the default makefile and Makefile, in that order, 1317 * if no makefiles were given on the command line. 1318 */ 1319 if (!noBuiltins) { 1320 StringListNode *ln; 1321 1322 sysMkPath = Lst_Init(); 1323 Dir_Expand(_PATH_DEFSYSMK, 1324 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath, 1325 sysMkPath); 1326 if (Lst_IsEmpty(sysMkPath)) 1327 Fatal("%s: no system rules (%s).", progname, 1328 _PATH_DEFSYSMK); 1329 ln = Lst_Find(sysMkPath, ReadMakefileSucceeded, NULL); 1330 if (ln == NULL) 1331 Fatal("%s: cannot open %s.", progname, 1332 (char *)LstNode_Datum(Lst_First(sysMkPath))); 1333 } 1334 1335 if (!Lst_IsEmpty(makefiles)) { 1336 StringListNode *ln; 1337 1338 ln = Lst_Find(makefiles, ReadMakefileFailed, NULL); 1339 if (ln != NULL) 1340 Fatal("%s: cannot open %s.", progname, 1341 (char *)LstNode_Datum(ln)); 1342 } else { 1343 (void)Var_Subst("${" MAKEFILE_PREFERENCE "}", 1344 VAR_CMD, VARE_WANTRES, &p1); 1345 /* TODO: handle errors */ 1346 (void)str2Lst_Append(makefiles, p1, NULL); 1347 (void)Lst_Find(makefiles, ReadMakefileSucceeded, NULL); 1348 free(p1); 1349 } 1350 1351 /* In particular suppress .depend for '-r -V .OBJDIR -f /dev/null' */ 1352 if (!noBuiltins || !printVars) { 1353 (void)Var_Subst("${.MAKE.DEPENDFILE:T}", 1354 VAR_CMD, VARE_WANTRES, &makeDependfile); 1355 /* TODO: handle errors */ 1356 doing_depend = TRUE; 1357 (void)ReadMakefile(makeDependfile); 1358 doing_depend = FALSE; 1359 } 1360 1361 if (enterFlagObj) 1362 printf("%s: Entering directory `%s'\n", progname, objdir); 1363 1364 MakeMode(NULL); 1365 1366 Var_Append("MFLAGS", Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1), VAR_GLOBAL); 1367 bmake_free(p1); 1368 1369 if (!forceJobs && !compatMake && 1370 Var_Exists(".MAKE.JOBS", VAR_GLOBAL)) { 1371 char *value; 1372 int n; 1373 1374 (void)Var_Subst("${.MAKE.JOBS}", VAR_GLOBAL, VARE_WANTRES, &value); 1375 /* TODO: handle errors */ 1376 n = strtol(value, NULL, 0); 1377 if (n < 1) { 1378 (void)fprintf(stderr, "%s: illegal value for .MAKE.JOBS -- must be positive integer!\n", 1379 progname); 1380 exit(1); 1381 } 1382 if (n != maxJobs) { 1383 Var_Append(MAKEFLAGS, "-j", VAR_GLOBAL); 1384 Var_Append(MAKEFLAGS, value, VAR_GLOBAL); 1385 } 1386 maxJobs = n; 1387 maxJobTokens = maxJobs; 1388 forceJobs = TRUE; 1389 free(value); 1390 } 1391 1392 /* 1393 * Be compatible if user did not specify -j and did not explicitly 1394 * turned compatibility on 1395 */ 1396 if (!compatMake && !forceJobs) { 1397 compatMake = TRUE; 1398 } 1399 1400 if (!compatMake) 1401 Job_ServerStart(maxJobTokens, jp_0, jp_1); 1402 if (DEBUG(JOB)) 1403 fprintf(debug_file, 1404 "job_pipe %d %d, maxjobs %d, tokens %d, compat %d\n", 1405 jp_0, jp_1, maxJobs, maxJobTokens, compatMake ? 1 : 0); 1406 1407 if (!printVars) 1408 Main_ExportMAKEFLAGS(TRUE); /* initial export */ 1409 1410 1411 /* 1412 * For compatibility, look at the directories in the VPATH variable 1413 * and add them to the search path, if the variable is defined. The 1414 * variable's value is in the same format as the PATH envariable, i.e. 1415 * <directory>:<directory>:<directory>... 1416 */ 1417 if (Var_Exists("VPATH", VAR_CMD)) { 1418 char *vpath, savec; 1419 /* 1420 * GCC stores string constants in read-only memory, but 1421 * Var_Subst will want to write this thing, so store it 1422 * in an array 1423 */ 1424 static char VPATH[] = "${VPATH}"; 1425 1426 (void)Var_Subst(VPATH, VAR_CMD, VARE_WANTRES, &vpath); 1427 /* TODO: handle errors */ 1428 path = vpath; 1429 do { 1430 /* skip to end of directory */ 1431 for (cp = path; *cp != ':' && *cp != '\0'; cp++) 1432 continue; 1433 /* Save terminator character so know when to stop */ 1434 savec = *cp; 1435 *cp = '\0'; 1436 /* Add directory to search path */ 1437 (void)Dir_AddDir(dirSearchPath, path); 1438 *cp = savec; 1439 path = cp + 1; 1440 } while (savec == ':'); 1441 free(vpath); 1442 } 1443 1444 /* 1445 * Now that all search paths have been read for suffixes et al, it's 1446 * time to add the default search path to their lists... 1447 */ 1448 Suff_DoPaths(); 1449 1450 /* 1451 * Propagate attributes through :: dependency lists. 1452 */ 1453 Targ_Propagate(); 1454 1455 /* print the initial graph, if the user requested it */ 1456 if (DEBUG(GRAPH1)) 1457 Targ_PrintGraph(1); 1458 1459 /* print the values of any variables requested by the user */ 1460 if (printVars) { 1461 doPrintVars(); 1462 outOfDate = FALSE; 1463 } else { 1464 outOfDate = runTargets(); 1465 } 1466 1467 #ifdef CLEANUP 1468 Lst_Free(variables); 1469 Lst_Free(makefiles); 1470 Lst_Destroy(create, free); 1471 #endif 1472 1473 /* print the graph now it's been processed if the user requested it */ 1474 if (DEBUG(GRAPH2)) 1475 Targ_PrintGraph(2); 1476 1477 Trace_Log(MAKEEND, 0); 1478 1479 if (enterFlagObj) 1480 printf("%s: Leaving directory `%s'\n", progname, objdir); 1481 if (enterFlag) 1482 printf("%s: Leaving directory `%s'\n", progname, curdir); 1483 1484 #ifdef USE_META 1485 meta_finish(); 1486 #endif 1487 Suff_End(); 1488 Targ_End(); 1489 Arch_End(); 1490 Var_End(); 1491 Parse_End(); 1492 Dir_End(); 1493 Job_End(); 1494 Trace_End(); 1495 1496 return outOfDate ? 1 : 0; 1497 } 1498 1499 /* Open and parse the given makefile, with all its side effects. 1500 * 1501 * Results: 1502 * 0 if ok. -1 if couldn't open file. 1503 */ 1504 static int 1505 ReadMakefile(const char *fname) 1506 { 1507 int fd; 1508 char *name, *path = NULL; 1509 1510 if (!strcmp(fname, "-")) { 1511 Parse_File(NULL /*stdin*/, -1); 1512 Var_Set("MAKEFILE", "", VAR_INTERNAL); 1513 } else { 1514 /* if we've chdir'd, rebuild the path name */ 1515 if (strcmp(curdir, objdir) && *fname != '/') { 1516 path = str_concat3(curdir, "/", fname); 1517 fd = open(path, O_RDONLY); 1518 if (fd != -1) { 1519 fname = path; 1520 goto found; 1521 } 1522 free(path); 1523 1524 /* If curdir failed, try objdir (ala .depend) */ 1525 path = str_concat3(objdir, "/", fname); 1526 fd = open(path, O_RDONLY); 1527 if (fd != -1) { 1528 fname = path; 1529 goto found; 1530 } 1531 } else { 1532 fd = open(fname, O_RDONLY); 1533 if (fd != -1) 1534 goto found; 1535 } 1536 /* look in -I and system include directories. */ 1537 name = Dir_FindFile(fname, parseIncPath); 1538 if (!name) 1539 name = Dir_FindFile(fname, 1540 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath); 1541 if (!name || (fd = open(name, O_RDONLY)) == -1) { 1542 free(name); 1543 free(path); 1544 return -1; 1545 } 1546 fname = name; 1547 /* 1548 * set the MAKEFILE variable desired by System V fans -- the 1549 * placement of the setting here means it gets set to the last 1550 * makefile specified, as it is set by SysV make. 1551 */ 1552 found: 1553 if (!doing_depend) 1554 Var_Set("MAKEFILE", fname, VAR_INTERNAL); 1555 Parse_File(fname, fd); 1556 } 1557 free(path); 1558 return 0; 1559 } 1560 1561 1562 1563 /*- 1564 * Cmd_Exec -- 1565 * Execute the command in cmd, and return the output of that command 1566 * in a string. In the output, newlines are replaced with spaces. 1567 * 1568 * Results: 1569 * A string containing the output of the command, or the empty string. 1570 * *errfmt returns a format string describing the command failure, 1571 * if any, using a single %s conversion specification. 1572 * 1573 * Side Effects: 1574 * The string must be freed by the caller. 1575 */ 1576 char * 1577 Cmd_Exec(const char *cmd, const char **errfmt) 1578 { 1579 const char *args[4]; /* Args for invoking the shell */ 1580 int fds[2]; /* Pipe streams */ 1581 int cpid; /* Child PID */ 1582 int pid; /* PID from wait() */ 1583 int status; /* command exit status */ 1584 Buffer buf; /* buffer to store the result */ 1585 ssize_t bytes_read; 1586 char *res; /* result */ 1587 size_t res_len; 1588 char *cp; 1589 int savederr; /* saved errno */ 1590 1591 *errfmt = NULL; 1592 1593 if (!shellName) 1594 Shell_Init(); 1595 /* 1596 * Set up arguments for shell 1597 */ 1598 args[0] = shellName; 1599 args[1] = "-c"; 1600 args[2] = cmd; 1601 args[3] = NULL; 1602 1603 /* 1604 * Open a pipe for fetching its output 1605 */ 1606 if (pipe(fds) == -1) { 1607 *errfmt = "Couldn't create pipe for \"%s\""; 1608 goto bad; 1609 } 1610 1611 /* 1612 * Fork 1613 */ 1614 switch (cpid = vFork()) { 1615 case 0: 1616 /* 1617 * Close input side of pipe 1618 */ 1619 (void)close(fds[0]); 1620 1621 /* 1622 * Duplicate the output stream to the shell's output, then 1623 * shut the extra thing down. Note we don't fetch the error 1624 * stream...why not? Why? 1625 */ 1626 (void)dup2(fds[1], 1); 1627 (void)close(fds[1]); 1628 1629 Var_ExportVars(); 1630 1631 (void)execv(shellPath, UNCONST(args)); 1632 _exit(1); 1633 /*NOTREACHED*/ 1634 1635 case -1: 1636 *errfmt = "Couldn't exec \"%s\""; 1637 goto bad; 1638 1639 default: 1640 /* 1641 * No need for the writing half 1642 */ 1643 (void)close(fds[1]); 1644 1645 savederr = 0; 1646 Buf_Init(&buf, 0); 1647 1648 do { 1649 char result[BUFSIZ]; 1650 bytes_read = read(fds[0], result, sizeof(result)); 1651 if (bytes_read > 0) 1652 Buf_AddBytes(&buf, result, (size_t)bytes_read); 1653 } 1654 while (bytes_read > 0 || (bytes_read == -1 && errno == EINTR)); 1655 if (bytes_read == -1) 1656 savederr = errno; 1657 1658 /* 1659 * Close the input side of the pipe. 1660 */ 1661 (void)close(fds[0]); 1662 1663 /* 1664 * Wait for the process to exit. 1665 */ 1666 while(((pid = waitpid(cpid, &status, 0)) != cpid) && (pid >= 0)) { 1667 JobReapChild(pid, status, FALSE); 1668 continue; 1669 } 1670 res_len = Buf_Size(&buf); 1671 res = Buf_Destroy(&buf, FALSE); 1672 1673 if (savederr != 0) 1674 *errfmt = "Couldn't read shell's output for \"%s\""; 1675 1676 if (WIFSIGNALED(status)) 1677 *errfmt = "\"%s\" exited on a signal"; 1678 else if (WEXITSTATUS(status) != 0) 1679 *errfmt = "\"%s\" returned non-zero status"; 1680 1681 /* Convert newlines to spaces. A final newline is just stripped */ 1682 if (res_len > 0 && res[res_len - 1] == '\n') 1683 res[res_len - 1] = '\0'; 1684 for (cp = res; *cp != '\0'; cp++) 1685 if (*cp == '\n') 1686 *cp = ' '; 1687 break; 1688 } 1689 return res; 1690 bad: 1691 return bmake_strdup(""); 1692 } 1693 1694 /*- 1695 * Error -- 1696 * Print an error message given its format. 1697 * 1698 * Results: 1699 * None. 1700 * 1701 * Side Effects: 1702 * The message is printed. 1703 */ 1704 void 1705 Error(const char *fmt, ...) 1706 { 1707 va_list ap; 1708 FILE *err_file; 1709 1710 err_file = debug_file; 1711 if (err_file == stdout) 1712 err_file = stderr; 1713 (void)fflush(stdout); 1714 for (;;) { 1715 va_start(ap, fmt); 1716 fprintf(err_file, "%s: ", progname); 1717 (void)vfprintf(err_file, fmt, ap); 1718 va_end(ap); 1719 (void)fprintf(err_file, "\n"); 1720 (void)fflush(err_file); 1721 if (err_file == stderr) 1722 break; 1723 err_file = stderr; 1724 } 1725 } 1726 1727 /* Produce a Fatal error message, then exit immediately. 1728 * 1729 * If jobs are running, waits for them to finish. */ 1730 void 1731 Fatal(const char *fmt, ...) 1732 { 1733 va_list ap; 1734 1735 va_start(ap, fmt); 1736 if (jobsRunning) 1737 Job_Wait(); 1738 1739 (void)fflush(stdout); 1740 (void)vfprintf(stderr, fmt, ap); 1741 va_end(ap); 1742 (void)fprintf(stderr, "\n"); 1743 (void)fflush(stderr); 1744 1745 PrintOnError(NULL, NULL); 1746 1747 if (DEBUG(GRAPH2) || DEBUG(GRAPH3)) 1748 Targ_PrintGraph(2); 1749 Trace_Log(MAKEERROR, 0); 1750 exit(2); /* Not 1 so -q can distinguish error */ 1751 } 1752 1753 /* 1754 * Punt -- 1755 * Major exception once jobs are being created. Kills all jobs, prints 1756 * a message and exits. 1757 * 1758 * Results: 1759 * None 1760 * 1761 * Side Effects: 1762 * All children are killed indiscriminately and the program Lib_Exits 1763 */ 1764 void 1765 Punt(const char *fmt, ...) 1766 { 1767 va_list ap; 1768 1769 va_start(ap, fmt); 1770 (void)fflush(stdout); 1771 (void)fprintf(stderr, "%s: ", progname); 1772 (void)vfprintf(stderr, fmt, ap); 1773 va_end(ap); 1774 (void)fprintf(stderr, "\n"); 1775 (void)fflush(stderr); 1776 1777 PrintOnError(NULL, NULL); 1778 1779 DieHorribly(); 1780 } 1781 1782 /*- 1783 * DieHorribly -- 1784 * Exit without giving a message. 1785 * 1786 * Results: 1787 * None 1788 * 1789 * Side Effects: 1790 * A big one... 1791 */ 1792 void 1793 DieHorribly(void) 1794 { 1795 if (jobsRunning) 1796 Job_AbortAll(); 1797 if (DEBUG(GRAPH2)) 1798 Targ_PrintGraph(2); 1799 Trace_Log(MAKEERROR, 0); 1800 exit(2); /* Not 1, so -q can distinguish error */ 1801 } 1802 1803 /* 1804 * Finish -- 1805 * Called when aborting due to errors in child shell to signal 1806 * abnormal exit. 1807 * 1808 * Results: 1809 * None 1810 * 1811 * Side Effects: 1812 * The program exits 1813 */ 1814 void 1815 Finish(int errors) 1816 /* number of errors encountered in Make_Make */ 1817 { 1818 if (dieQuietly(NULL, -1)) 1819 exit(2); 1820 Fatal("%d error%s", errors, errors == 1 ? "" : "s"); 1821 } 1822 1823 /* 1824 * eunlink -- 1825 * Remove a file carefully, avoiding directories. 1826 */ 1827 int 1828 eunlink(const char *file) 1829 { 1830 struct stat st; 1831 1832 if (lstat(file, &st) == -1) 1833 return -1; 1834 1835 if (S_ISDIR(st.st_mode)) { 1836 errno = EISDIR; 1837 return -1; 1838 } 1839 return unlink(file); 1840 } 1841 1842 /* 1843 * execError -- 1844 * Print why exec failed, avoiding stdio. 1845 */ 1846 void 1847 execError(const char *af, const char *av) 1848 { 1849 #ifdef USE_IOVEC 1850 int i = 0; 1851 struct iovec iov[8]; 1852 #define IOADD(s) \ 1853 (void)(iov[i].iov_base = UNCONST(s), \ 1854 iov[i].iov_len = strlen(iov[i].iov_base), \ 1855 i++) 1856 #else 1857 #define IOADD(void)write(2, s, strlen(s)) 1858 #endif 1859 1860 IOADD(progname); 1861 IOADD(": "); 1862 IOADD(af); 1863 IOADD("("); 1864 IOADD(av); 1865 IOADD(") failed ("); 1866 IOADD(strerror(errno)); 1867 IOADD(")\n"); 1868 1869 #ifdef USE_IOVEC 1870 while (writev(2, iov, 8) == -1 && errno == EAGAIN) 1871 continue; 1872 #endif 1873 } 1874 1875 /* 1876 * usage -- 1877 * exit with usage message 1878 */ 1879 static void 1880 usage(void) 1881 { 1882 char *p; 1883 if ((p = strchr(progname, '[')) != NULL) 1884 *p = '\0'; 1885 1886 (void)fprintf(stderr, 1887 "usage: %s [-BeikNnqrstWwX] \n" 1888 " [-C directory] [-D variable] [-d flags] [-f makefile]\n" 1889 " [-I directory] [-J private] [-j max_jobs] [-m directory] [-T file]\n" 1890 " [-V variable] [-v variable] [variable=value] [target ...]\n", 1891 progname); 1892 exit(2); 1893 } 1894 1895 /* 1896 * realpath(3) can get expensive, cache results... 1897 */ 1898 static GNode *cached_realpaths = NULL; 1899 1900 static GNode * 1901 get_cached_realpaths(void) 1902 { 1903 1904 if (!cached_realpaths) { 1905 cached_realpaths = Targ_NewGN("Realpath"); 1906 #ifndef DEBUG_REALPATH_CACHE 1907 cached_realpaths->flags = INTERNAL; 1908 #endif 1909 } 1910 1911 return cached_realpaths; 1912 } 1913 1914 /* purge any relative paths */ 1915 static void 1916 purge_cached_realpaths(void) 1917 { 1918 GNode *cache = get_cached_realpaths(); 1919 Hash_Entry *he, *nhe; 1920 Hash_Search hs; 1921 1922 he = Hash_EnumFirst(&cache->context, &hs); 1923 while (he) { 1924 nhe = Hash_EnumNext(&hs); 1925 if (he->name[0] != '/') { 1926 if (DEBUG(DIR)) 1927 fprintf(stderr, "cached_realpath: purging %s\n", he->name); 1928 Hash_DeleteEntry(&cache->context, he); 1929 } 1930 he = nhe; 1931 } 1932 } 1933 1934 char * 1935 cached_realpath(const char *pathname, char *resolved) 1936 { 1937 GNode *cache; 1938 const char *rp; 1939 char *cp; 1940 1941 if (!pathname || !pathname[0]) 1942 return NULL; 1943 1944 cache = get_cached_realpaths(); 1945 1946 if ((rp = Var_Value(pathname, cache, &cp)) != NULL) { 1947 /* a hit */ 1948 strncpy(resolved, rp, MAXPATHLEN); 1949 resolved[MAXPATHLEN - 1] = '\0'; 1950 } else if ((rp = realpath(pathname, resolved)) != NULL) { 1951 Var_Set(pathname, rp, cache); 1952 } /* else should we negative-cache? */ 1953 1954 bmake_free(cp); 1955 return rp ? resolved : NULL; 1956 } 1957 1958 1959 static int 1960 addErrorCMD(void *cmdp, void *gnp) 1961 { 1962 if (cmdp == NULL) 1963 return 1; /* stop */ 1964 Var_Append(".ERROR_CMD", cmdp, VAR_GLOBAL); 1965 return 0; 1966 } 1967 1968 /* 1969 * Return true if we should die without noise. 1970 * For example our failing child was a sub-make 1971 * or failure happend elsewhere. 1972 */ 1973 int 1974 dieQuietly(GNode *gn, int bf) 1975 { 1976 static int quietly = -1; 1977 1978 if (quietly < 0) { 1979 if (DEBUG(JOB) || getBoolean(".MAKE.DIE_QUIETLY", 1) == 0) 1980 quietly = 0; 1981 else if (bf >= 0) 1982 quietly = bf; 1983 else 1984 quietly = (gn) ? ((gn->type & (OP_MAKE)) != 0) : 0; 1985 } 1986 return quietly; 1987 } 1988 1989 void 1990 PrintOnError(GNode *gn, const char *s) 1991 { 1992 static GNode *en = NULL; 1993 const char *expr; 1994 char *cp; 1995 1996 if (DEBUG(HASH)) { 1997 Targ_Stats(); 1998 Var_Stats(); 1999 } 2000 2001 /* we generally want to keep quiet if a sub-make died */ 2002 if (dieQuietly(gn, -1)) 2003 return; 2004 2005 if (s) 2006 printf("%s", s); 2007 2008 printf("\n%s: stopped in %s\n", progname, curdir); 2009 2010 if (en) 2011 return; /* we've been here! */ 2012 if (gn) { 2013 /* 2014 * We can print this even if there is no .ERROR target. 2015 */ 2016 Var_Set(".ERROR_TARGET", gn->name, VAR_GLOBAL); 2017 Var_Delete(".ERROR_CMD", VAR_GLOBAL); 2018 Lst_ForEach(gn->commands, addErrorCMD, gn); 2019 } 2020 expr = "${MAKE_PRINT_VAR_ON_ERROR:@v@$v='${$v}'\n@}"; 2021 (void)Var_Subst(expr, VAR_GLOBAL, VARE_WANTRES, &cp); 2022 /* TODO: handle errors */ 2023 printf("%s", cp); 2024 free(cp); 2025 fflush(stdout); 2026 2027 /* 2028 * Finally, see if there is a .ERROR target, and run it if so. 2029 */ 2030 en = Targ_FindNode(".ERROR", TARG_NOCREATE); 2031 if (en) { 2032 en->type |= OP_SPECIAL; 2033 Compat_Make(en, en); 2034 } 2035 } 2036 2037 void 2038 Main_ExportMAKEFLAGS(Boolean first) 2039 { 2040 static Boolean once = TRUE; 2041 const char *expr; 2042 char *s; 2043 2044 if (once != first) 2045 return; 2046 once = FALSE; 2047 2048 expr = "${.MAKEFLAGS} ${.MAKEOVERRIDES:O:u:@v@$v=${$v:Q}@}"; 2049 (void)Var_Subst(expr, VAR_CMD, VARE_WANTRES, &s); 2050 /* TODO: handle errors */ 2051 if (s[0] != '\0') { 2052 #ifdef POSIX 2053 setenv("MAKEFLAGS", s, 1); 2054 #else 2055 setenv("MAKE", s, 1); 2056 #endif 2057 } 2058 } 2059 2060 char * 2061 getTmpdir(void) 2062 { 2063 static char *tmpdir = NULL; 2064 2065 if (!tmpdir) { 2066 struct stat st; 2067 2068 /* 2069 * Honor $TMPDIR but only if it is valid. 2070 * Ensure it ends with /. 2071 */ 2072 (void)Var_Subst("${TMPDIR:tA:U" _PATH_TMP "}/", VAR_GLOBAL, 2073 VARE_WANTRES, &tmpdir); 2074 /* TODO: handle errors */ 2075 if (stat(tmpdir, &st) < 0 || !S_ISDIR(st.st_mode)) { 2076 free(tmpdir); 2077 tmpdir = bmake_strdup(_PATH_TMP); 2078 } 2079 } 2080 return tmpdir; 2081 } 2082 2083 /* 2084 * Create and open a temp file using "pattern". 2085 * If "fnamep" is provided set it to a copy of the filename created. 2086 * Otherwise unlink the file once open. 2087 */ 2088 int 2089 mkTempFile(const char *pattern, char **fnamep) 2090 { 2091 static char *tmpdir = NULL; 2092 char tfile[MAXPATHLEN]; 2093 int fd; 2094 2095 if (!pattern) 2096 pattern = TMPPAT; 2097 if (!tmpdir) 2098 tmpdir = getTmpdir(); 2099 if (pattern[0] == '/') { 2100 snprintf(tfile, sizeof(tfile), "%s", pattern); 2101 } else { 2102 snprintf(tfile, sizeof(tfile), "%s%s", tmpdir, pattern); 2103 } 2104 if ((fd = mkstemp(tfile)) < 0) 2105 Punt("Could not create temporary file %s: %s", tfile, strerror(errno)); 2106 if (fnamep) { 2107 *fnamep = bmake_strdup(tfile); 2108 } else { 2109 unlink(tfile); /* we just want the descriptor */ 2110 } 2111 return fd; 2112 } 2113 2114 /* 2115 * Convert a string representation of a boolean. 2116 * Anything that looks like "No", "False", "Off", "0" etc, 2117 * is FALSE, otherwise TRUE. 2118 */ 2119 Boolean 2120 s2Boolean(const char *s, Boolean bf) 2121 { 2122 if (s) { 2123 switch(*s) { 2124 case '\0': /* not set - the default wins */ 2125 break; 2126 case '0': 2127 case 'F': 2128 case 'f': 2129 case 'N': 2130 case 'n': 2131 bf = FALSE; 2132 break; 2133 case 'O': 2134 case 'o': 2135 switch (s[1]) { 2136 case 'F': 2137 case 'f': 2138 bf = FALSE; 2139 break; 2140 default: 2141 bf = TRUE; 2142 break; 2143 } 2144 break; 2145 default: 2146 bf = TRUE; 2147 break; 2148 } 2149 } 2150 return bf; 2151 } 2152 2153 /* 2154 * Return a Boolean based on setting of a knob. 2155 * 2156 * If the knob is not set, the supplied default is the return value. 2157 * If set, anything that looks or smells like "No", "False", "Off", "0" etc, 2158 * is FALSE, otherwise TRUE. 2159 */ 2160 Boolean 2161 getBoolean(const char *name, Boolean fallback) 2162 { 2163 char *expr = str_concat3("${", name, ":U:tl}"); 2164 char *value; 2165 Boolean res; 2166 2167 (void)Var_Subst(expr, VAR_GLOBAL, VARE_WANTRES, &value); 2168 /* TODO: handle errors */ 2169 res = s2Boolean(value, fallback); 2170 free(value); 2171 free(expr); 2172 return res; 2173 } 2174
Indexes created Mon Sep 22 21:09:42 GMT 2025