main.c revision 1.354
1 /* $NetBSD: main.c,v 1.354 2020/10/01 23:02:07 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 1.354 2020/10/01 23:02:07 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 Boolean 392 MainParseArg(char c, char *argvalue) 393 { 394 struct stat sa, sb; 395 char *p; 396 char found_path[MAXPATHLEN + 1]; /* for searching for sys.mk */ 397 398 switch (c) { 399 case '\0': 400 break; 401 case 'B': 402 compatMake = TRUE; 403 Var_Append(MAKEFLAGS, "-B", VAR_GLOBAL); 404 Var_Set(MAKE_MODE, "compat", VAR_GLOBAL); 405 break; 406 case 'C': 407 if (chdir(argvalue) == -1) { 408 (void)fprintf(stderr, 409 "%s: chdir %s: %s\n", 410 progname, argvalue, 411 strerror(errno)); 412 exit(1); 413 } 414 if (getcwd(curdir, MAXPATHLEN) == NULL) { 415 (void)fprintf(stderr, "%s: %s.\n", progname, strerror(errno)); 416 exit(2); 417 } 418 if (!is_relpath(argvalue) && 419 stat(argvalue, &sa) != -1 && 420 stat(curdir, &sb) != -1 && 421 sa.st_ino == sb.st_ino && 422 sa.st_dev == sb.st_dev) 423 strncpy(curdir, argvalue, MAXPATHLEN); 424 ignorePWD = TRUE; 425 break; 426 case 'D': 427 if (argvalue == NULL || argvalue[0] == 0) return FALSE; 428 Var_Set(argvalue, "1", VAR_GLOBAL); 429 Var_Append(MAKEFLAGS, "-D", VAR_GLOBAL); 430 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 431 break; 432 case 'I': 433 if (argvalue == NULL) return FALSE; 434 Parse_AddIncludeDir(argvalue); 435 Var_Append(MAKEFLAGS, "-I", VAR_GLOBAL); 436 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 437 break; 438 case 'J': 439 if (argvalue == NULL) return FALSE; 440 if (sscanf(argvalue, "%d,%d", &jp_0, &jp_1) != 2) { 441 (void)fprintf(stderr, 442 "%s: internal error -- J option malformed (%s)\n", 443 progname, argvalue); 444 usage(); 445 } 446 if ((fcntl(jp_0, F_GETFD, 0) < 0) || 447 (fcntl(jp_1, F_GETFD, 0) < 0)) { 448 #if 0 449 (void)fprintf(stderr, 450 "%s: ###### warning -- J descriptors were closed!\n", 451 progname); 452 exit(2); 453 #endif 454 jp_0 = -1; 455 jp_1 = -1; 456 compatMake = TRUE; 457 } else { 458 Var_Append(MAKEFLAGS, "-J", VAR_GLOBAL); 459 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 460 } 461 break; 462 case 'N': 463 noExecute = TRUE; 464 noRecursiveExecute = TRUE; 465 Var_Append(MAKEFLAGS, "-N", VAR_GLOBAL); 466 break; 467 case 'S': 468 keepgoing = FALSE; 469 Var_Append(MAKEFLAGS, "-S", VAR_GLOBAL); 470 break; 471 case 'T': 472 if (argvalue == NULL) return FALSE; 473 tracefile = bmake_strdup(argvalue); 474 Var_Append(MAKEFLAGS, "-T", VAR_GLOBAL); 475 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 476 break; 477 case 'V': 478 case 'v': 479 if (argvalue == NULL) return FALSE; 480 printVars = c == 'v' ? EXPAND_VARS : COMPAT_VARS; 481 Lst_Append(variables, bmake_strdup(argvalue)); 482 Var_Append(MAKEFLAGS, "-V", VAR_GLOBAL); 483 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 484 break; 485 case 'W': 486 parseWarnFatal = TRUE; 487 break; 488 case 'X': 489 varNoExportEnv = TRUE; 490 Var_Append(MAKEFLAGS, "-X", VAR_GLOBAL); 491 break; 492 case 'd': 493 if (argvalue == NULL) return FALSE; 494 /* If '-d-opts' don't pass to children */ 495 if (argvalue[0] == '-') 496 argvalue++; 497 else { 498 Var_Append(MAKEFLAGS, "-d", VAR_GLOBAL); 499 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 500 } 501 parse_debug_options(argvalue); 502 break; 503 case 'e': 504 checkEnvFirst = TRUE; 505 Var_Append(MAKEFLAGS, "-e", VAR_GLOBAL); 506 break; 507 case 'f': 508 if (argvalue == NULL) return FALSE; 509 Lst_Append(makefiles, bmake_strdup(argvalue)); 510 break; 511 case 'i': 512 ignoreErrors = TRUE; 513 Var_Append(MAKEFLAGS, "-i", VAR_GLOBAL); 514 break; 515 case 'j': 516 if (argvalue == NULL) return FALSE; 517 forceJobs = TRUE; 518 maxJobs = strtol(argvalue, &p, 0); 519 if (*p != '\0' || maxJobs < 1) { 520 (void)fprintf(stderr, "%s: illegal argument to -j -- must be positive integer!\n", 521 progname); 522 exit(1); 523 } 524 Var_Append(MAKEFLAGS, "-j", VAR_GLOBAL); 525 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 526 Var_Set(".MAKE.JOBS", argvalue, VAR_GLOBAL); 527 maxJobTokens = maxJobs; 528 break; 529 case 'k': 530 keepgoing = TRUE; 531 Var_Append(MAKEFLAGS, "-k", VAR_GLOBAL); 532 break; 533 case 'm': 534 if (argvalue == NULL) return FALSE; 535 /* look for magic parent directory search string */ 536 if (strncmp(".../", argvalue, 4) == 0) { 537 if (!Dir_FindHereOrAbove(curdir, argvalue + 4, 538 found_path, sizeof(found_path))) 539 break; /* nothing doing */ 540 (void)Dir_AddDir(sysIncPath, found_path); 541 } else { 542 (void)Dir_AddDir(sysIncPath, argvalue); 543 } 544 Var_Append(MAKEFLAGS, "-m", VAR_GLOBAL); 545 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 546 break; 547 case 'n': 548 noExecute = TRUE; 549 Var_Append(MAKEFLAGS, "-n", VAR_GLOBAL); 550 break; 551 case 'q': 552 queryFlag = TRUE; 553 /* Kind of nonsensical, wot? */ 554 Var_Append(MAKEFLAGS, "-q", VAR_GLOBAL); 555 break; 556 case 'r': 557 noBuiltins = TRUE; 558 Var_Append(MAKEFLAGS, "-r", VAR_GLOBAL); 559 break; 560 case 's': 561 beSilent = TRUE; 562 Var_Append(MAKEFLAGS, "-s", VAR_GLOBAL); 563 break; 564 case 't': 565 touchFlag = TRUE; 566 Var_Append(MAKEFLAGS, "-t", VAR_GLOBAL); 567 break; 568 case 'w': 569 enterFlag = TRUE; 570 Var_Append(MAKEFLAGS, "-w", VAR_GLOBAL); 571 break; 572 default: 573 case '?': 574 usage(); 575 } 576 return TRUE; 577 } 578 579 /* Parse the given arguments. Called from main() and from 580 * Main_ParseArgLine() when the .MAKEFLAGS target is used. 581 * 582 * The arguments must be treated as read-only and will be freed after the 583 * call. 584 * 585 * XXX: Deal with command line overriding .MAKEFLAGS in makefile */ 586 static void 587 MainParseArgs(int argc, char **argv) 588 { 589 char c = '?'; 590 int arginc; 591 char *argvalue; 592 const char *getopt_def; 593 char *optscan; 594 Boolean inOption, dashDash = FALSE; 595 596 #define OPTFLAGS "BC:D:I:J:NST:V:WXd:ef:ij:km:nqrstv:w" 597 /* Can't actually use getopt(3) because rescanning is not portable */ 598 599 getopt_def = OPTFLAGS; 600 rearg: 601 inOption = FALSE; 602 optscan = NULL; 603 while(argc > 1) { 604 char *getopt_spec; 605 if(!inOption) 606 optscan = argv[1]; 607 c = *optscan++; 608 arginc = 0; 609 if(inOption) { 610 if(c == '\0') { 611 ++argv; 612 --argc; 613 inOption = FALSE; 614 continue; 615 } 616 } else { 617 if (c != '-' || dashDash) 618 break; 619 inOption = TRUE; 620 c = *optscan++; 621 } 622 /* '-' found at some earlier point */ 623 getopt_spec = strchr(getopt_def, c); 624 if(c != '\0' && getopt_spec != NULL && getopt_spec[1] == ':') { 625 /* -<something> found, and <something> should have an arg */ 626 inOption = FALSE; 627 arginc = 1; 628 argvalue = optscan; 629 if(*argvalue == '\0') { 630 if (argc < 3) 631 goto noarg; 632 argvalue = argv[2]; 633 arginc = 2; 634 } 635 } else { 636 argvalue = NULL; 637 } 638 switch (c) { 639 case '\0': 640 arginc = 1; 641 inOption = FALSE; 642 break; 643 case '-': 644 dashDash = TRUE; 645 break; 646 default: 647 if (!MainParseArg(c, argvalue)) 648 goto noarg; 649 } 650 argv += arginc; 651 argc -= arginc; 652 } 653 654 oldVars = TRUE; 655 656 /* 657 * See if the rest of the arguments are variable assignments and 658 * perform them if so. Else take them to be targets and stuff them 659 * on the end of the "create" list. 660 */ 661 for (; argc > 1; ++argv, --argc) 662 if (Parse_IsVar(argv[1])) { 663 Parse_DoVar(argv[1], VAR_CMD); 664 } else { 665 if (!*argv[1]) 666 Punt("illegal (null) argument."); 667 if (*argv[1] == '-' && !dashDash) 668 goto rearg; 669 Lst_Append(create, bmake_strdup(argv[1])); 670 } 671 672 return; 673 noarg: 674 (void)fprintf(stderr, "%s: option requires an argument -- %c\n", 675 progname, c); 676 usage(); 677 } 678 679 /*- 680 * Main_ParseArgLine -- 681 * Used by the parse module when a .MFLAGS or .MAKEFLAGS target 682 * is encountered and by main() when reading the .MAKEFLAGS envariable. 683 * Takes a line of arguments and breaks it into its 684 * component words and passes those words and the number of them to the 685 * MainParseArgs function. 686 * The line should have all its leading whitespace removed. 687 * 688 * Input: 689 * line Line to fracture 690 * 691 * Results: 692 * None 693 * 694 * Side Effects: 695 * Only those that come from the various arguments. 696 */ 697 void 698 Main_ParseArgLine(const char *line) 699 { 700 Words words; 701 char *p1; 702 const char *argv0 = Var_Value(".MAKE", VAR_GLOBAL, &p1); 703 char *buf; 704 705 if (line == NULL) 706 return; 707 for (; *line == ' '; ++line) 708 continue; 709 if (!*line) 710 return; 711 712 buf = str_concat3(argv0, " ", line); 713 free(p1); 714 715 words = Str_Words(buf, TRUE); 716 if (words.words == NULL) { 717 Error("Unterminated quoted string [%s]", buf); 718 free(buf); 719 return; 720 } 721 free(buf); 722 MainParseArgs((int)words.len, words.words); 723 724 Words_Free(words); 725 } 726 727 Boolean 728 Main_SetObjdir(const char *fmt, ...) 729 { 730 struct stat sb; 731 char *path; 732 char buf[MAXPATHLEN + 1]; 733 char buf2[MAXPATHLEN + 1]; 734 Boolean rc = FALSE; 735 va_list ap; 736 737 va_start(ap, fmt); 738 vsnprintf(path = buf, MAXPATHLEN, fmt, ap); 739 va_end(ap); 740 741 if (path[0] != '/') { 742 snprintf(buf2, MAXPATHLEN, "%s/%s", curdir, path); 743 path = buf2; 744 } 745 746 /* look for the directory and try to chdir there */ 747 if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) { 748 if (chdir(path)) { 749 (void)fprintf(stderr, "make warning: %s: %s.\n", 750 path, strerror(errno)); 751 } else { 752 snprintf(objdir, sizeof objdir, "%s", path); 753 Var_Set(".OBJDIR", objdir, VAR_GLOBAL); 754 setenv("PWD", objdir, 1); 755 Dir_InitDot(); 756 purge_cached_realpaths(); 757 rc = TRUE; 758 if (enterFlag && strcmp(objdir, curdir) != 0) 759 enterFlagObj = TRUE; 760 } 761 } 762 763 return rc; 764 } 765 766 static Boolean 767 Main_SetVarObjdir(const char *var, const char *suffix) 768 { 769 char *path_freeIt; 770 const char *path = Var_Value(var, VAR_CMD, &path_freeIt); 771 const char *xpath; 772 char *xpath_freeIt; 773 774 if (path == NULL || path[0] == '\0') { 775 bmake_free(path_freeIt); 776 return FALSE; 777 } 778 779 /* expand variable substitutions */ 780 xpath = path; 781 xpath_freeIt = NULL; 782 if (strchr(path, '$') != 0) { 783 (void)Var_Subst(path, VAR_GLOBAL, VARE_WANTRES, &xpath_freeIt); 784 /* TODO: handle errors */ 785 xpath = xpath_freeIt; 786 } 787 788 (void)Main_SetObjdir("%s%s", xpath, suffix); 789 790 bmake_free(xpath_freeIt); 791 bmake_free(path_freeIt); 792 return TRUE; 793 } 794 795 /* Read and parse the makefile. 796 * Return TRUE if reading the makefile succeeded, for Lst_Find. */ 797 static Boolean 798 ReadMakefileSucceeded(const void *fname, const void *unused) 799 { 800 return ReadMakefile(fname) == 0; 801 } 802 803 /* Read and parse the makefile. 804 * Return TRUE if reading the makefile failed, for Lst_Find. */ 805 static Boolean 806 ReadMakefileFailed(const void *fname, const void *unused) 807 { 808 return ReadMakefile(fname) != 0; 809 } 810 811 int 812 str2Lst_Append(StringList *lp, char *str, const char *sep) 813 { 814 char *cp; 815 int n; 816 817 if (!sep) 818 sep = " \t"; 819 820 for (n = 0, cp = strtok(str, sep); cp; cp = strtok(NULL, sep)) { 821 Lst_Append(lp, cp); 822 n++; 823 } 824 return n; 825 } 826 827 #ifdef SIGINFO 828 /*ARGSUSED*/ 829 static void 830 siginfo(int signo MAKE_ATTR_UNUSED) 831 { 832 char dir[MAXPATHLEN]; 833 char str[2 * MAXPATHLEN]; 834 int len; 835 if (getcwd(dir, sizeof(dir)) == NULL) 836 return; 837 len = snprintf(str, sizeof(str), "%s: Working in: %s\n", progname, dir); 838 if (len > 0) 839 (void)write(STDERR_FILENO, str, (size_t)len); 840 } 841 #endif 842 843 /* 844 * Allow makefiles some control over the mode we run in. 845 */ 846 void 847 MakeMode(const char *mode) 848 { 849 char *mode_freeIt = NULL; 850 851 if (mode == NULL) { 852 (void)Var_Subst("${" MAKE_MODE ":tl}", 853 VAR_GLOBAL, VARE_WANTRES, &mode_freeIt); 854 /* TODO: handle errors */ 855 mode = mode_freeIt; 856 } 857 858 if (mode[0] != '\0') { 859 if (strstr(mode, "compat")) { 860 compatMake = TRUE; 861 forceJobs = FALSE; 862 } 863 #if USE_META 864 if (strstr(mode, "meta")) 865 meta_mode_init(mode); 866 #endif 867 } 868 869 free(mode_freeIt); 870 } 871 872 static void 873 doPrintVars(void) 874 { 875 StringListNode *ln; 876 Boolean expandVars; 877 878 if (printVars == EXPAND_VARS) 879 expandVars = TRUE; 880 else if (debugVflag) 881 expandVars = FALSE; 882 else 883 expandVars = getBoolean(".MAKE.EXPAND_VARIABLES", FALSE); 884 885 for (ln = variables->first; ln != NULL; ln = ln->next) { 886 const char *var = ln->datum; 887 const char *value; 888 char *p1; 889 890 if (strchr(var, '$')) { 891 (void)Var_Subst(var, VAR_GLOBAL, VARE_WANTRES, &p1); 892 /* TODO: handle errors */ 893 value = p1; 894 } else if (expandVars) { 895 char *expr = str_concat3("${", var, "}"); 896 (void)Var_Subst(expr, VAR_GLOBAL, VARE_WANTRES, &p1); 897 /* TODO: handle errors */ 898 value = p1; 899 free(expr); 900 } else { 901 value = Var_Value(var, VAR_GLOBAL, &p1); 902 } 903 printf("%s\n", value ? value : ""); 904 bmake_free(p1); 905 } 906 } 907 908 static Boolean 909 runTargets(void) 910 { 911 GNodeList *targs; /* target nodes to create -- passed to Make_Init */ 912 Boolean outOfDate; /* FALSE if all targets up to date */ 913 914 /* 915 * Have now read the entire graph and need to make a list of 916 * targets to create. If none was given on the command line, 917 * we consult the parsing module to find the main target(s) 918 * to create. 919 */ 920 if (Lst_IsEmpty(create)) 921 targs = Parse_MainName(); 922 else 923 targs = Targ_FindList(create); 924 925 if (!compatMake) { 926 /* 927 * Initialize job module before traversing the graph 928 * now that any .BEGIN and .END targets have been read. 929 * This is done only if the -q flag wasn't given 930 * (to prevent the .BEGIN from being executed should 931 * it exist). 932 */ 933 if (!queryFlag) { 934 Job_Init(); 935 jobsRunning = TRUE; 936 } 937 938 /* Traverse the graph, checking on all the targets */ 939 outOfDate = Make_Run(targs); 940 } else { 941 /* 942 * Compat_Init will take care of creating all the 943 * targets as well as initializing the module. 944 */ 945 Compat_Run(targs); 946 outOfDate = FALSE; 947 } 948 Lst_Free(targs); 949 return outOfDate; 950 } 951 952 /* 953 * Set up the .TARGETS variable to contain the list of targets to be 954 * created. If none specified, make the variable empty -- the parser 955 * will fill the thing in with the default or .MAIN target. 956 */ 957 static void 958 InitVarTargets(void) 959 { 960 StringListNode *ln; 961 962 if (Lst_IsEmpty(create)) { 963 Var_Set(".TARGETS", "", VAR_GLOBAL); 964 return; 965 } 966 967 for (ln = create->first; ln != NULL; ln = ln->next) { 968 char *name = ln->datum; 969 Var_Append(".TARGETS", name, VAR_GLOBAL); 970 } 971 } 972 973 /*- 974 * main -- 975 * The main function, for obvious reasons. Initializes variables 976 * and a few modules, then parses the arguments give it in the 977 * environment and on the command line. Reads the system makefile 978 * followed by either Makefile, makefile or the file given by the 979 * -f argument. Sets the .MAKEFLAGS PMake variable based on all the 980 * flags it has received by then uses either the Make or the Compat 981 * module to create the initial list of targets. 982 * 983 * Results: 984 * If -q was given, exits -1 if anything was out-of-date. Else it exits 985 * 0. 986 * 987 * Side Effects: 988 * The program exits when done. Targets are created. etc. etc. etc. 989 */ 990 int 991 main(int argc, char **argv) 992 { 993 Boolean outOfDate; /* FALSE if all targets up to date */ 994 struct stat sb, sa; 995 char *p1, *path; 996 char mdpath[MAXPATHLEN]; 997 const char *machine = getenv("MACHINE"); 998 const char *machine_arch = getenv("MACHINE_ARCH"); 999 char *syspath = getenv("MAKESYSPATH"); 1000 StringList *sysMkPath; /* Path of sys.mk */ 1001 char *cp = NULL, *start; 1002 /* avoid faults on read-only strings */ 1003 static char defsyspath[] = _PATH_DEFSYSPATH; 1004 char found_path[MAXPATHLEN + 1]; /* for searching for sys.mk */ 1005 struct timeval rightnow; /* to initialize random seed */ 1006 struct utsname utsname; 1007 1008 /* default to writing debug to stderr */ 1009 debug_file = stderr; 1010 1011 #ifdef SIGINFO 1012 (void)bmake_signal(SIGINFO, siginfo); 1013 #endif 1014 /* 1015 * Set the seed to produce a different random sequence 1016 * on each program execution. 1017 */ 1018 gettimeofday(&rightnow, NULL); 1019 srandom(rightnow.tv_sec + rightnow.tv_usec); 1020 1021 if ((progname = strrchr(argv[0], '/')) != NULL) 1022 progname++; 1023 else 1024 progname = argv[0]; 1025 #if defined(MAKE_NATIVE) || (defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE)) 1026 /* 1027 * get rid of resource limit on file descriptors 1028 */ 1029 { 1030 struct rlimit rl; 1031 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 && 1032 rl.rlim_cur != rl.rlim_max) { 1033 rl.rlim_cur = rl.rlim_max; 1034 (void)setrlimit(RLIMIT_NOFILE, &rl); 1035 } 1036 } 1037 #endif 1038 1039 if (uname(&utsname) == -1) { 1040 (void)fprintf(stderr, "%s: uname failed (%s).\n", progname, 1041 strerror(errno)); 1042 exit(2); 1043 } 1044 1045 /* 1046 * Get the name of this type of MACHINE from utsname 1047 * so we can share an executable for similar machines. 1048 * (i.e. m68k: amiga hp300, mac68k, sun3, ...) 1049 * 1050 * Note that both MACHINE and MACHINE_ARCH are decided at 1051 * run-time. 1052 */ 1053 if (!machine) { 1054 #ifdef MAKE_NATIVE 1055 machine = utsname.machine; 1056 #else 1057 #ifdef MAKE_MACHINE 1058 machine = MAKE_MACHINE; 1059 #else 1060 machine = "unknown"; 1061 #endif 1062 #endif 1063 } 1064 1065 if (!machine_arch) { 1066 #ifdef MAKE_NATIVE 1067 static char machine_arch_buf[sizeof(utsname.machine)]; 1068 const int mib[2] = { CTL_HW, HW_MACHINE_ARCH }; 1069 size_t len = sizeof(machine_arch_buf); 1070 1071 if (sysctl(mib, __arraycount(mib), machine_arch_buf, 1072 &len, NULL, 0) < 0) { 1073 (void)fprintf(stderr, "%s: sysctl failed (%s).\n", progname, 1074 strerror(errno)); 1075 exit(2); 1076 } 1077 1078 machine_arch = machine_arch_buf; 1079 #else 1080 #ifndef MACHINE_ARCH 1081 #ifdef MAKE_MACHINE_ARCH 1082 machine_arch = MAKE_MACHINE_ARCH; 1083 #else 1084 machine_arch = "unknown"; 1085 #endif 1086 #else 1087 machine_arch = MACHINE_ARCH; 1088 #endif 1089 #endif 1090 } 1091 1092 myPid = getpid(); /* remember this for vFork() */ 1093 1094 /* 1095 * Just in case MAKEOBJDIR wants us to do something tricky. 1096 */ 1097 Var_Init(); /* Initialize the lists of variables for 1098 * parsing arguments */ 1099 Var_Set(".MAKE.OS", utsname.sysname, VAR_GLOBAL); 1100 Var_Set("MACHINE", machine, VAR_GLOBAL); 1101 Var_Set("MACHINE_ARCH", machine_arch, VAR_GLOBAL); 1102 #ifdef MAKE_VERSION 1103 Var_Set("MAKE_VERSION", MAKE_VERSION, VAR_GLOBAL); 1104 #endif 1105 Var_Set(".newline", "\n", VAR_GLOBAL); /* handy for :@ loops */ 1106 /* 1107 * This is the traditional preference for makefiles. 1108 */ 1109 #ifndef MAKEFILE_PREFERENCE_LIST 1110 # define MAKEFILE_PREFERENCE_LIST "makefile Makefile" 1111 #endif 1112 Var_Set(MAKEFILE_PREFERENCE, MAKEFILE_PREFERENCE_LIST, 1113 VAR_GLOBAL); 1114 Var_Set(MAKE_DEPENDFILE, ".depend", VAR_GLOBAL); 1115 1116 create = Lst_Init(); 1117 makefiles = Lst_Init(); 1118 printVars = 0; 1119 debugVflag = FALSE; 1120 variables = Lst_Init(); 1121 beSilent = FALSE; /* Print commands as executed */ 1122 ignoreErrors = FALSE; /* Pay attention to non-zero returns */ 1123 noExecute = FALSE; /* Execute all commands */ 1124 noRecursiveExecute = FALSE; /* Execute all .MAKE targets */ 1125 keepgoing = FALSE; /* Stop on error */ 1126 allPrecious = FALSE; /* Remove targets when interrupted */ 1127 deleteOnError = FALSE; /* Historical default behavior */ 1128 queryFlag = FALSE; /* This is not just a check-run */ 1129 noBuiltins = FALSE; /* Read the built-in rules */ 1130 touchFlag = FALSE; /* Actually update targets */ 1131 debug = 0; /* No debug verbosity, please. */ 1132 jobsRunning = FALSE; 1133 1134 maxJobs = DEFMAXLOCAL; /* Set default local max concurrency */ 1135 maxJobTokens = maxJobs; 1136 compatMake = FALSE; /* No compat mode */ 1137 ignorePWD = FALSE; 1138 1139 /* 1140 * Initialize the parsing, directory and variable modules to prepare 1141 * for the reading of inclusion paths and variable settings on the 1142 * command line 1143 */ 1144 1145 /* 1146 * Initialize various variables. 1147 * MAKE also gets this name, for compatibility 1148 * .MAKEFLAGS gets set to the empty string just in case. 1149 * MFLAGS also gets initialized empty, for compatibility. 1150 */ 1151 Parse_Init(); 1152 if (argv[0][0] == '/' || strchr(argv[0], '/') == NULL) { 1153 /* 1154 * Leave alone if it is an absolute path, or if it does 1155 * not contain a '/' in which case we need to find it in 1156 * the path, like execvp(3) and the shells do. 1157 */ 1158 p1 = argv[0]; 1159 } else { 1160 /* 1161 * A relative path, canonicalize it. 1162 */ 1163 p1 = cached_realpath(argv[0], mdpath); 1164 if (!p1 || *p1 != '/' || stat(p1, &sb) < 0) { 1165 p1 = argv[0]; /* realpath failed */ 1166 } 1167 } 1168 Var_Set("MAKE", p1, VAR_GLOBAL); 1169 Var_Set(".MAKE", p1, VAR_GLOBAL); 1170 Var_Set(MAKEFLAGS, "", VAR_GLOBAL); 1171 Var_Set(MAKEOVERRIDES, "", VAR_GLOBAL); 1172 Var_Set("MFLAGS", "", VAR_GLOBAL); 1173 Var_Set(".ALLTARGETS", "", VAR_GLOBAL); 1174 /* some makefiles need to know this */ 1175 Var_Set(MAKE_LEVEL ".ENV", MAKE_LEVEL_ENV, VAR_CMD); 1176 1177 /* 1178 * Set some other useful macros 1179 */ 1180 { 1181 char tmp[64], *ep; 1182 1183 makelevel = ((ep = getenv(MAKE_LEVEL_ENV)) && *ep) ? atoi(ep) : 0; 1184 if (makelevel < 0) 1185 makelevel = 0; 1186 snprintf(tmp, sizeof(tmp), "%d", makelevel); 1187 Var_Set(MAKE_LEVEL, tmp, VAR_GLOBAL); 1188 snprintf(tmp, sizeof(tmp), "%u", myPid); 1189 Var_Set(".MAKE.PID", tmp, VAR_GLOBAL); 1190 snprintf(tmp, sizeof(tmp), "%u", getppid()); 1191 Var_Set(".MAKE.PPID", tmp, VAR_GLOBAL); 1192 } 1193 if (makelevel > 0) { 1194 char pn[1024]; 1195 snprintf(pn, sizeof(pn), "%s[%d]", progname, makelevel); 1196 progname = bmake_strdup(pn); 1197 } 1198 1199 #ifdef USE_META 1200 meta_init(); 1201 #endif 1202 Dir_Init(); 1203 1204 /* 1205 * First snag any flags out of the MAKE environment variable. 1206 * (Note this is *not* MAKEFLAGS since /bin/make uses that and it's 1207 * in a different format). 1208 */ 1209 #ifdef POSIX 1210 p1 = explode(getenv("MAKEFLAGS")); 1211 Main_ParseArgLine(p1); 1212 free(p1); 1213 #else 1214 Main_ParseArgLine(getenv("MAKE")); 1215 #endif 1216 1217 /* 1218 * Find where we are (now). 1219 * We take care of PWD for the automounter below... 1220 */ 1221 if (getcwd(curdir, MAXPATHLEN) == NULL) { 1222 (void)fprintf(stderr, "%s: getcwd: %s.\n", 1223 progname, strerror(errno)); 1224 exit(2); 1225 } 1226 1227 MainParseArgs(argc, argv); 1228 1229 if (enterFlag) 1230 printf("%s: Entering directory `%s'\n", progname, curdir); 1231 1232 /* 1233 * Verify that cwd is sane. 1234 */ 1235 if (stat(curdir, &sa) == -1) { 1236 (void)fprintf(stderr, "%s: %s: %s.\n", 1237 progname, curdir, strerror(errno)); 1238 exit(2); 1239 } 1240 1241 /* 1242 * All this code is so that we know where we are when we start up 1243 * on a different machine with pmake. 1244 * Overriding getcwd() with $PWD totally breaks MAKEOBJDIRPREFIX 1245 * since the value of curdir can vary depending on how we got 1246 * here. Ie sitting at a shell prompt (shell that provides $PWD) 1247 * or via subdir.mk in which case its likely a shell which does 1248 * not provide it. 1249 * So, to stop it breaking this case only, we ignore PWD if 1250 * MAKEOBJDIRPREFIX is set or MAKEOBJDIR contains a transform. 1251 */ 1252 #ifndef NO_PWD_OVERRIDE 1253 if (!ignorePWD) { 1254 char *pwd, *ptmp1 = NULL, *ptmp2 = NULL; 1255 1256 if ((pwd = getenv("PWD")) != NULL && 1257 Var_Value("MAKEOBJDIRPREFIX", VAR_CMD, &ptmp1) == NULL) { 1258 const char *makeobjdir = Var_Value("MAKEOBJDIR", 1259 VAR_CMD, &ptmp2); 1260 1261 if (makeobjdir == NULL || !strchr(makeobjdir, '$')) { 1262 if (stat(pwd, &sb) == 0 && 1263 sa.st_ino == sb.st_ino && 1264 sa.st_dev == sb.st_dev) 1265 (void)strncpy(curdir, pwd, MAXPATHLEN); 1266 } 1267 } 1268 bmake_free(ptmp1); 1269 bmake_free(ptmp2); 1270 } 1271 #endif 1272 Var_Set(".CURDIR", curdir, VAR_GLOBAL); 1273 1274 /* 1275 * Find the .OBJDIR. If MAKEOBJDIRPREFIX, or failing that, 1276 * MAKEOBJDIR is set in the environment, try only that value 1277 * and fall back to .CURDIR if it does not exist. 1278 * 1279 * Otherwise, try _PATH_OBJDIR.MACHINE-MACHINE_ARCH, _PATH_OBJDIR.MACHINE, 1280 * and * finally _PATH_OBJDIRPREFIX`pwd`, in that order. If none 1281 * of these paths exist, just use .CURDIR. 1282 */ 1283 Dir_InitDir(curdir); 1284 (void)Main_SetObjdir("%s", curdir); 1285 1286 if (!Main_SetVarObjdir("MAKEOBJDIRPREFIX", curdir) && 1287 !Main_SetVarObjdir("MAKEOBJDIR", "") && 1288 !Main_SetObjdir("%s.%s-%s", _PATH_OBJDIR, machine, machine_arch) && 1289 !Main_SetObjdir("%s.%s", _PATH_OBJDIR, machine) && 1290 !Main_SetObjdir("%s", _PATH_OBJDIR)) 1291 (void)Main_SetObjdir("%s%s", _PATH_OBJDIRPREFIX, curdir); 1292 1293 /* 1294 * Initialize archive, target and suffix modules in preparation for 1295 * parsing the makefile(s) 1296 */ 1297 Arch_Init(); 1298 Targ_Init(); 1299 Suff_Init(); 1300 Trace_Init(tracefile); 1301 1302 DEFAULT = NULL; 1303 (void)time(&now); 1304 1305 Trace_Log(MAKESTART, NULL); 1306 1307 InitVarTargets(); 1308 1309 /* 1310 * If no user-supplied system path was given (through the -m option) 1311 * add the directories from the DEFSYSPATH (more than one may be given 1312 * as dir1:...:dirn) to the system include path. 1313 */ 1314 /* XXX: mismatch: the -m option sets sysIncPath, not syspath */ 1315 if (syspath == NULL || syspath[0] == '\0') 1316 syspath = defsyspath; 1317 else 1318 syspath = bmake_strdup(syspath); 1319 1320 for (start = syspath; *start != '\0'; start = cp) { 1321 for (cp = start; *cp != '\0' && *cp != ':'; cp++) 1322 continue; 1323 if (*cp == ':') { 1324 *cp++ = '\0'; 1325 } 1326 /* look for magic parent directory search string */ 1327 if (strncmp(".../", start, 4) != 0) { 1328 (void)Dir_AddDir(defIncPath, start); 1329 } else { 1330 if (Dir_FindHereOrAbove(curdir, start+4, 1331 found_path, sizeof(found_path))) { 1332 (void)Dir_AddDir(defIncPath, found_path); 1333 } 1334 } 1335 } 1336 if (syspath != defsyspath) 1337 free(syspath); 1338 1339 /* 1340 * Read in the built-in rules first, followed by the specified 1341 * makefiles, or the default makefile and Makefile, in that order, 1342 * if no makefiles were given on the command line. 1343 */ 1344 if (!noBuiltins) { 1345 StringListNode *ln; 1346 1347 sysMkPath = Lst_Init(); 1348 Dir_Expand(_PATH_DEFSYSMK, 1349 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath, 1350 sysMkPath); 1351 if (Lst_IsEmpty(sysMkPath)) 1352 Fatal("%s: no system rules (%s).", progname, 1353 _PATH_DEFSYSMK); 1354 ln = Lst_Find(sysMkPath, ReadMakefileSucceeded, NULL); 1355 if (ln == NULL) 1356 Fatal("%s: cannot open %s.", progname, 1357 (char *)LstNode_Datum(Lst_First(sysMkPath))); 1358 } 1359 1360 if (!Lst_IsEmpty(makefiles)) { 1361 StringListNode *ln; 1362 1363 ln = Lst_Find(makefiles, ReadMakefileFailed, NULL); 1364 if (ln != NULL) 1365 Fatal("%s: cannot open %s.", progname, 1366 (char *)LstNode_Datum(ln)); 1367 } else { 1368 (void)Var_Subst("${" MAKEFILE_PREFERENCE "}", 1369 VAR_CMD, VARE_WANTRES, &p1); 1370 /* TODO: handle errors */ 1371 (void)str2Lst_Append(makefiles, p1, NULL); 1372 (void)Lst_Find(makefiles, ReadMakefileSucceeded, NULL); 1373 free(p1); 1374 } 1375 1376 /* In particular suppress .depend for '-r -V .OBJDIR -f /dev/null' */ 1377 if (!noBuiltins || !printVars) { 1378 (void)Var_Subst("${.MAKE.DEPENDFILE:T}", 1379 VAR_CMD, VARE_WANTRES, &makeDependfile); 1380 /* TODO: handle errors */ 1381 doing_depend = TRUE; 1382 (void)ReadMakefile(makeDependfile); 1383 doing_depend = FALSE; 1384 } 1385 1386 if (enterFlagObj) 1387 printf("%s: Entering directory `%s'\n", progname, objdir); 1388 1389 MakeMode(NULL); 1390 1391 Var_Append("MFLAGS", Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1), VAR_GLOBAL); 1392 bmake_free(p1); 1393 1394 if (!forceJobs && !compatMake && 1395 Var_Exists(".MAKE.JOBS", VAR_GLOBAL)) { 1396 char *value; 1397 int n; 1398 1399 (void)Var_Subst("${.MAKE.JOBS}", VAR_GLOBAL, VARE_WANTRES, &value); 1400 /* TODO: handle errors */ 1401 n = strtol(value, NULL, 0); 1402 if (n < 1) { 1403 (void)fprintf(stderr, "%s: illegal value for .MAKE.JOBS -- must be positive integer!\n", 1404 progname); 1405 exit(1); 1406 } 1407 if (n != maxJobs) { 1408 Var_Append(MAKEFLAGS, "-j", VAR_GLOBAL); 1409 Var_Append(MAKEFLAGS, value, VAR_GLOBAL); 1410 } 1411 maxJobs = n; 1412 maxJobTokens = maxJobs; 1413 forceJobs = TRUE; 1414 free(value); 1415 } 1416 1417 /* 1418 * Be compatible if user did not specify -j and did not explicitly 1419 * turned compatibility on 1420 */ 1421 if (!compatMake && !forceJobs) { 1422 compatMake = TRUE; 1423 } 1424 1425 if (!compatMake) 1426 Job_ServerStart(maxJobTokens, jp_0, jp_1); 1427 DEBUG5(JOB, "job_pipe %d %d, maxjobs %d, tokens %d, compat %d\n", 1428 jp_0, jp_1, maxJobs, maxJobTokens, compatMake ? 1 : 0); 1429 1430 if (!printVars) 1431 Main_ExportMAKEFLAGS(TRUE); /* initial export */ 1432 1433 1434 /* 1435 * For compatibility, look at the directories in the VPATH variable 1436 * and add them to the search path, if the variable is defined. The 1437 * variable's value is in the same format as the PATH envariable, i.e. 1438 * <directory>:<directory>:<directory>... 1439 */ 1440 if (Var_Exists("VPATH", VAR_CMD)) { 1441 char *vpath, savec; 1442 /* 1443 * GCC stores string constants in read-only memory, but 1444 * Var_Subst will want to write this thing, so store it 1445 * in an array 1446 */ 1447 static char VPATH[] = "${VPATH}"; 1448 1449 (void)Var_Subst(VPATH, VAR_CMD, VARE_WANTRES, &vpath); 1450 /* TODO: handle errors */ 1451 path = vpath; 1452 do { 1453 /* skip to end of directory */ 1454 for (cp = path; *cp != ':' && *cp != '\0'; cp++) 1455 continue; 1456 /* Save terminator character so know when to stop */ 1457 savec = *cp; 1458 *cp = '\0'; 1459 /* Add directory to search path */ 1460 (void)Dir_AddDir(dirSearchPath, path); 1461 *cp = savec; 1462 path = cp + 1; 1463 } while (savec == ':'); 1464 free(vpath); 1465 } 1466 1467 /* 1468 * Now that all search paths have been read for suffixes et al, it's 1469 * time to add the default search path to their lists... 1470 */ 1471 Suff_DoPaths(); 1472 1473 /* 1474 * Propagate attributes through :: dependency lists. 1475 */ 1476 Targ_Propagate(); 1477 1478 /* print the initial graph, if the user requested it */ 1479 if (DEBUG(GRAPH1)) 1480 Targ_PrintGraph(1); 1481 1482 /* print the values of any variables requested by the user */ 1483 if (printVars) { 1484 doPrintVars(); 1485 outOfDate = FALSE; 1486 } else { 1487 outOfDate = runTargets(); 1488 } 1489 1490 #ifdef CLEANUP 1491 Lst_Free(variables); 1492 Lst_Free(makefiles); 1493 Lst_Destroy(create, free); 1494 #endif 1495 1496 /* print the graph now it's been processed if the user requested it */ 1497 if (DEBUG(GRAPH2)) 1498 Targ_PrintGraph(2); 1499 1500 Trace_Log(MAKEEND, 0); 1501 1502 if (enterFlagObj) 1503 printf("%s: Leaving directory `%s'\n", progname, objdir); 1504 if (enterFlag) 1505 printf("%s: Leaving directory `%s'\n", progname, curdir); 1506 1507 #ifdef USE_META 1508 meta_finish(); 1509 #endif 1510 Suff_End(); 1511 Targ_End(); 1512 Arch_End(); 1513 Var_End(); 1514 Parse_End(); 1515 Dir_End(); 1516 Job_End(); 1517 Trace_End(); 1518 1519 return outOfDate ? 1 : 0; 1520 } 1521 1522 /* Open and parse the given makefile, with all its side effects. 1523 * 1524 * Results: 1525 * 0 if ok. -1 if couldn't open file. 1526 */ 1527 static int 1528 ReadMakefile(const char *fname) 1529 { 1530 int fd; 1531 char *name, *path = NULL; 1532 1533 if (!strcmp(fname, "-")) { 1534 Parse_File(NULL /*stdin*/, -1); 1535 Var_Set("MAKEFILE", "", VAR_INTERNAL); 1536 } else { 1537 /* if we've chdir'd, rebuild the path name */ 1538 if (strcmp(curdir, objdir) && *fname != '/') { 1539 path = str_concat3(curdir, "/", fname); 1540 fd = open(path, O_RDONLY); 1541 if (fd != -1) { 1542 fname = path; 1543 goto found; 1544 } 1545 free(path); 1546 1547 /* If curdir failed, try objdir (ala .depend) */ 1548 path = str_concat3(objdir, "/", fname); 1549 fd = open(path, O_RDONLY); 1550 if (fd != -1) { 1551 fname = path; 1552 goto found; 1553 } 1554 } else { 1555 fd = open(fname, O_RDONLY); 1556 if (fd != -1) 1557 goto found; 1558 } 1559 /* look in -I and system include directories. */ 1560 name = Dir_FindFile(fname, parseIncPath); 1561 if (!name) 1562 name = Dir_FindFile(fname, 1563 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath); 1564 if (!name || (fd = open(name, O_RDONLY)) == -1) { 1565 free(name); 1566 free(path); 1567 return -1; 1568 } 1569 fname = name; 1570 /* 1571 * set the MAKEFILE variable desired by System V fans -- the 1572 * placement of the setting here means it gets set to the last 1573 * makefile specified, as it is set by SysV make. 1574 */ 1575 found: 1576 if (!doing_depend) 1577 Var_Set("MAKEFILE", fname, VAR_INTERNAL); 1578 Parse_File(fname, fd); 1579 } 1580 free(path); 1581 return 0; 1582 } 1583 1584 1585 1586 /*- 1587 * Cmd_Exec -- 1588 * Execute the command in cmd, and return the output of that command 1589 * in a string. In the output, newlines are replaced with spaces. 1590 * 1591 * Results: 1592 * A string containing the output of the command, or the empty string. 1593 * *errfmt returns a format string describing the command failure, 1594 * if any, using a single %s conversion specification. 1595 * 1596 * Side Effects: 1597 * The string must be freed by the caller. 1598 */ 1599 char * 1600 Cmd_Exec(const char *cmd, const char **errfmt) 1601 { 1602 const char *args[4]; /* Args for invoking the shell */ 1603 int fds[2]; /* Pipe streams */ 1604 int cpid; /* Child PID */ 1605 int pid; /* PID from wait() */ 1606 int status; /* command exit status */ 1607 Buffer buf; /* buffer to store the result */ 1608 ssize_t bytes_read; 1609 char *res; /* result */ 1610 size_t res_len; 1611 char *cp; 1612 int savederr; /* saved errno */ 1613 1614 *errfmt = NULL; 1615 1616 if (!shellName) 1617 Shell_Init(); 1618 /* 1619 * Set up arguments for shell 1620 */ 1621 args[0] = shellName; 1622 args[1] = "-c"; 1623 args[2] = cmd; 1624 args[3] = NULL; 1625 1626 /* 1627 * Open a pipe for fetching its output 1628 */ 1629 if (pipe(fds) == -1) { 1630 *errfmt = "Couldn't create pipe for \"%s\""; 1631 goto bad; 1632 } 1633 1634 /* 1635 * Fork 1636 */ 1637 switch (cpid = vFork()) { 1638 case 0: 1639 /* 1640 * Close input side of pipe 1641 */ 1642 (void)close(fds[0]); 1643 1644 /* 1645 * Duplicate the output stream to the shell's output, then 1646 * shut the extra thing down. Note we don't fetch the error 1647 * stream...why not? Why? 1648 */ 1649 (void)dup2(fds[1], 1); 1650 (void)close(fds[1]); 1651 1652 Var_ExportVars(); 1653 1654 (void)execv(shellPath, UNCONST(args)); 1655 _exit(1); 1656 /*NOTREACHED*/ 1657 1658 case -1: 1659 *errfmt = "Couldn't exec \"%s\""; 1660 goto bad; 1661 1662 default: 1663 /* 1664 * No need for the writing half 1665 */ 1666 (void)close(fds[1]); 1667 1668 savederr = 0; 1669 Buf_Init(&buf, 0); 1670 1671 do { 1672 char result[BUFSIZ]; 1673 bytes_read = read(fds[0], result, sizeof(result)); 1674 if (bytes_read > 0) 1675 Buf_AddBytes(&buf, result, (size_t)bytes_read); 1676 } 1677 while (bytes_read > 0 || (bytes_read == -1 && errno == EINTR)); 1678 if (bytes_read == -1) 1679 savederr = errno; 1680 1681 /* 1682 * Close the input side of the pipe. 1683 */ 1684 (void)close(fds[0]); 1685 1686 /* 1687 * Wait for the process to exit. 1688 */ 1689 while(((pid = waitpid(cpid, &status, 0)) != cpid) && (pid >= 0)) { 1690 JobReapChild(pid, status, FALSE); 1691 continue; 1692 } 1693 res_len = Buf_Len(&buf); 1694 res = Buf_Destroy(&buf, FALSE); 1695 1696 if (savederr != 0) 1697 *errfmt = "Couldn't read shell's output for \"%s\""; 1698 1699 if (WIFSIGNALED(status)) 1700 *errfmt = "\"%s\" exited on a signal"; 1701 else if (WEXITSTATUS(status) != 0) 1702 *errfmt = "\"%s\" returned non-zero status"; 1703 1704 /* Convert newlines to spaces. A final newline is just stripped */ 1705 if (res_len > 0 && res[res_len - 1] == '\n') 1706 res[res_len - 1] = '\0'; 1707 for (cp = res; *cp != '\0'; cp++) 1708 if (*cp == '\n') 1709 *cp = ' '; 1710 break; 1711 } 1712 return res; 1713 bad: 1714 return bmake_strdup(""); 1715 } 1716 1717 /*- 1718 * Error -- 1719 * Print an error message given its format. 1720 * 1721 * Results: 1722 * None. 1723 * 1724 * Side Effects: 1725 * The message is printed. 1726 */ 1727 void 1728 Error(const char *fmt, ...) 1729 { 1730 va_list ap; 1731 FILE *err_file; 1732 1733 err_file = debug_file; 1734 if (err_file == stdout) 1735 err_file = stderr; 1736 (void)fflush(stdout); 1737 for (;;) { 1738 va_start(ap, fmt); 1739 fprintf(err_file, "%s: ", progname); 1740 (void)vfprintf(err_file, fmt, ap); 1741 va_end(ap); 1742 (void)fprintf(err_file, "\n"); 1743 (void)fflush(err_file); 1744 if (err_file == stderr) 1745 break; 1746 err_file = stderr; 1747 } 1748 } 1749 1750 /* Produce a Fatal error message, then exit immediately. 1751 * 1752 * If jobs are running, waits for them to finish. */ 1753 void 1754 Fatal(const char *fmt, ...) 1755 { 1756 va_list ap; 1757 1758 va_start(ap, fmt); 1759 if (jobsRunning) 1760 Job_Wait(); 1761 1762 (void)fflush(stdout); 1763 (void)vfprintf(stderr, fmt, ap); 1764 va_end(ap); 1765 (void)fprintf(stderr, "\n"); 1766 (void)fflush(stderr); 1767 1768 PrintOnError(NULL, NULL); 1769 1770 if (DEBUG(GRAPH2) || DEBUG(GRAPH3)) 1771 Targ_PrintGraph(2); 1772 Trace_Log(MAKEERROR, 0); 1773 exit(2); /* Not 1 so -q can distinguish error */ 1774 } 1775 1776 /* 1777 * Punt -- 1778 * Major exception once jobs are being created. Kills all jobs, prints 1779 * a message and exits. 1780 * 1781 * Results: 1782 * None 1783 * 1784 * Side Effects: 1785 * All children are killed indiscriminately and the program Lib_Exits 1786 */ 1787 void 1788 Punt(const char *fmt, ...) 1789 { 1790 va_list ap; 1791 1792 va_start(ap, fmt); 1793 (void)fflush(stdout); 1794 (void)fprintf(stderr, "%s: ", progname); 1795 (void)vfprintf(stderr, fmt, ap); 1796 va_end(ap); 1797 (void)fprintf(stderr, "\n"); 1798 (void)fflush(stderr); 1799 1800 PrintOnError(NULL, NULL); 1801 1802 DieHorribly(); 1803 } 1804 1805 /*- 1806 * DieHorribly -- 1807 * Exit without giving a message. 1808 * 1809 * Results: 1810 * None 1811 * 1812 * Side Effects: 1813 * A big one... 1814 */ 1815 void 1816 DieHorribly(void) 1817 { 1818 if (jobsRunning) 1819 Job_AbortAll(); 1820 if (DEBUG(GRAPH2)) 1821 Targ_PrintGraph(2); 1822 Trace_Log(MAKEERROR, 0); 1823 exit(2); /* Not 1, so -q can distinguish error */ 1824 } 1825 1826 /* 1827 * Finish -- 1828 * Called when aborting due to errors in child shell to signal 1829 * abnormal exit. 1830 * 1831 * Results: 1832 * None 1833 * 1834 * Side Effects: 1835 * The program exits 1836 */ 1837 void 1838 Finish(int errors) 1839 /* number of errors encountered in Make_Make */ 1840 { 1841 if (dieQuietly(NULL, -1)) 1842 exit(2); 1843 Fatal("%d error%s", errors, errors == 1 ? "" : "s"); 1844 } 1845 1846 /* 1847 * eunlink -- 1848 * Remove a file carefully, avoiding directories. 1849 */ 1850 int 1851 eunlink(const char *file) 1852 { 1853 struct stat st; 1854 1855 if (lstat(file, &st) == -1) 1856 return -1; 1857 1858 if (S_ISDIR(st.st_mode)) { 1859 errno = EISDIR; 1860 return -1; 1861 } 1862 return unlink(file); 1863 } 1864 1865 /* 1866 * execError -- 1867 * Print why exec failed, avoiding stdio. 1868 */ 1869 void 1870 execError(const char *af, const char *av) 1871 { 1872 #ifdef USE_IOVEC 1873 int i = 0; 1874 struct iovec iov[8]; 1875 #define IOADD(s) \ 1876 (void)(iov[i].iov_base = UNCONST(s), \ 1877 iov[i].iov_len = strlen(iov[i].iov_base), \ 1878 i++) 1879 #else 1880 #define IOADD(void)write(2, s, strlen(s)) 1881 #endif 1882 1883 IOADD(progname); 1884 IOADD(": "); 1885 IOADD(af); 1886 IOADD("("); 1887 IOADD(av); 1888 IOADD(") failed ("); 1889 IOADD(strerror(errno)); 1890 IOADD(")\n"); 1891 1892 #ifdef USE_IOVEC 1893 while (writev(2, iov, 8) == -1 && errno == EAGAIN) 1894 continue; 1895 #endif 1896 } 1897 1898 /* 1899 * usage -- 1900 * exit with usage message 1901 */ 1902 static void 1903 usage(void) 1904 { 1905 char *p; 1906 if ((p = strchr(progname, '[')) != NULL) 1907 *p = '\0'; 1908 1909 (void)fprintf(stderr, 1910 "usage: %s [-BeikNnqrstWwX] \n" 1911 " [-C directory] [-D variable] [-d flags] [-f makefile]\n" 1912 " [-I directory] [-J private] [-j max_jobs] [-m directory] [-T file]\n" 1913 " [-V variable] [-v variable] [variable=value] [target ...]\n", 1914 progname); 1915 exit(2); 1916 } 1917 1918 /* 1919 * realpath(3) can get expensive, cache results... 1920 */ 1921 static GNode *cached_realpaths = NULL; 1922 1923 static GNode * 1924 get_cached_realpaths(void) 1925 { 1926 1927 if (!cached_realpaths) { 1928 cached_realpaths = Targ_NewGN("Realpath"); 1929 #ifndef DEBUG_REALPATH_CACHE 1930 cached_realpaths->flags = INTERNAL; 1931 #endif 1932 } 1933 1934 return cached_realpaths; 1935 } 1936 1937 /* purge any relative paths */ 1938 static void 1939 purge_cached_realpaths(void) 1940 { 1941 GNode *cache = get_cached_realpaths(); 1942 Hash_Entry *he, *nhe; 1943 Hash_Search hs; 1944 1945 he = Hash_EnumFirst(&cache->context, &hs); 1946 while (he) { 1947 nhe = Hash_EnumNext(&hs); 1948 if (he->name[0] != '/') { 1949 if (DEBUG(DIR)) 1950 fprintf(stderr, "cached_realpath: purging %s\n", he->name); 1951 Hash_DeleteEntry(&cache->context, he); 1952 } 1953 he = nhe; 1954 } 1955 } 1956 1957 char * 1958 cached_realpath(const char *pathname, char *resolved) 1959 { 1960 GNode *cache; 1961 const char *rp; 1962 char *cp; 1963 1964 if (!pathname || !pathname[0]) 1965 return NULL; 1966 1967 cache = get_cached_realpaths(); 1968 1969 if ((rp = Var_Value(pathname, cache, &cp)) != NULL) { 1970 /* a hit */ 1971 strncpy(resolved, rp, MAXPATHLEN); 1972 resolved[MAXPATHLEN - 1] = '\0'; 1973 } else if ((rp = realpath(pathname, resolved)) != NULL) { 1974 Var_Set(pathname, rp, cache); 1975 } /* else should we negative-cache? */ 1976 1977 bmake_free(cp); 1978 return rp ? resolved : NULL; 1979 } 1980 1981 1982 static int 1983 addErrorCMD(void *cmdp, void *gnp) 1984 { 1985 if (cmdp == NULL) 1986 return 1; /* stop */ 1987 Var_Append(".ERROR_CMD", cmdp, VAR_GLOBAL); 1988 return 0; 1989 } 1990 1991 /* 1992 * Return true if we should die without noise. 1993 * For example our failing child was a sub-make 1994 * or failure happend elsewhere. 1995 */ 1996 int 1997 dieQuietly(GNode *gn, int bf) 1998 { 1999 static int quietly = -1; 2000 2001 if (quietly < 0) { 2002 if (DEBUG(JOB) || getBoolean(".MAKE.DIE_QUIETLY", 1) == 0) 2003 quietly = 0; 2004 else if (bf >= 0) 2005 quietly = bf; 2006 else 2007 quietly = (gn) ? ((gn->type & (OP_MAKE)) != 0) : 0; 2008 } 2009 return quietly; 2010 } 2011 2012 void 2013 PrintOnError(GNode *gn, const char *s) 2014 { 2015 static GNode *en = NULL; 2016 const char *expr; 2017 char *cp; 2018 2019 if (DEBUG(HASH)) { 2020 Targ_Stats(); 2021 Var_Stats(); 2022 } 2023 2024 /* we generally want to keep quiet if a sub-make died */ 2025 if (dieQuietly(gn, -1)) 2026 return; 2027 2028 if (s) 2029 printf("%s", s); 2030 2031 printf("\n%s: stopped in %s\n", progname, curdir); 2032 2033 if (en) 2034 return; /* we've been here! */ 2035 if (gn) { 2036 /* 2037 * We can print this even if there is no .ERROR target. 2038 */ 2039 Var_Set(".ERROR_TARGET", gn->name, VAR_GLOBAL); 2040 Var_Delete(".ERROR_CMD", VAR_GLOBAL); 2041 Lst_ForEachUntil(gn->commands, addErrorCMD, gn); 2042 } 2043 expr = "${MAKE_PRINT_VAR_ON_ERROR:@v@$v='${$v}'\n@}"; 2044 (void)Var_Subst(expr, VAR_GLOBAL, VARE_WANTRES, &cp); 2045 /* TODO: handle errors */ 2046 printf("%s", cp); 2047 free(cp); 2048 fflush(stdout); 2049 2050 /* 2051 * Finally, see if there is a .ERROR target, and run it if so. 2052 */ 2053 en = Targ_FindNode(".ERROR"); 2054 if (en) { 2055 en->type |= OP_SPECIAL; 2056 Compat_Make(en, en); 2057 } 2058 } 2059 2060 void 2061 Main_ExportMAKEFLAGS(Boolean first) 2062 { 2063 static Boolean once = TRUE; 2064 const char *expr; 2065 char *s; 2066 2067 if (once != first) 2068 return; 2069 once = FALSE; 2070 2071 expr = "${.MAKEFLAGS} ${.MAKEOVERRIDES:O:u:@v@$v=${$v:Q}@}"; 2072 (void)Var_Subst(expr, VAR_CMD, VARE_WANTRES, &s); 2073 /* TODO: handle errors */ 2074 if (s[0] != '\0') { 2075 #ifdef POSIX 2076 setenv("MAKEFLAGS", s, 1); 2077 #else 2078 setenv("MAKE", s, 1); 2079 #endif 2080 } 2081 } 2082 2083 char * 2084 getTmpdir(void) 2085 { 2086 static char *tmpdir = NULL; 2087 2088 if (!tmpdir) { 2089 struct stat st; 2090 2091 /* 2092 * Honor $TMPDIR but only if it is valid. 2093 * Ensure it ends with /. 2094 */ 2095 (void)Var_Subst("${TMPDIR:tA:U" _PATH_TMP "}/", VAR_GLOBAL, 2096 VARE_WANTRES, &tmpdir); 2097 /* TODO: handle errors */ 2098 if (stat(tmpdir, &st) < 0 || !S_ISDIR(st.st_mode)) { 2099 free(tmpdir); 2100 tmpdir = bmake_strdup(_PATH_TMP); 2101 } 2102 } 2103 return tmpdir; 2104 } 2105 2106 /* 2107 * Create and open a temp file using "pattern". 2108 * If "fnamep" is provided set it to a copy of the filename created. 2109 * Otherwise unlink the file once open. 2110 */ 2111 int 2112 mkTempFile(const char *pattern, char **fnamep) 2113 { 2114 static char *tmpdir = NULL; 2115 char tfile[MAXPATHLEN]; 2116 int fd; 2117 2118 if (!pattern) 2119 pattern = TMPPAT; 2120 if (!tmpdir) 2121 tmpdir = getTmpdir(); 2122 if (pattern[0] == '/') { 2123 snprintf(tfile, sizeof(tfile), "%s", pattern); 2124 } else { 2125 snprintf(tfile, sizeof(tfile), "%s%s", tmpdir, pattern); 2126 } 2127 if ((fd = mkstemp(tfile)) < 0) 2128 Punt("Could not create temporary file %s: %s", tfile, strerror(errno)); 2129 if (fnamep) { 2130 *fnamep = bmake_strdup(tfile); 2131 } else { 2132 unlink(tfile); /* we just want the descriptor */ 2133 } 2134 return fd; 2135 } 2136 2137 /* 2138 * Convert a string representation of a boolean. 2139 * Anything that looks like "No", "False", "Off", "0" etc, 2140 * is FALSE, otherwise TRUE. 2141 */ 2142 Boolean 2143 s2Boolean(const char *s, Boolean bf) 2144 { 2145 if (s) { 2146 switch(*s) { 2147 case '\0': /* not set - the default wins */ 2148 break; 2149 case '0': 2150 case 'F': 2151 case 'f': 2152 case 'N': 2153 case 'n': 2154 bf = FALSE; 2155 break; 2156 case 'O': 2157 case 'o': 2158 switch (s[1]) { 2159 case 'F': 2160 case 'f': 2161 bf = FALSE; 2162 break; 2163 default: 2164 bf = TRUE; 2165 break; 2166 } 2167 break; 2168 default: 2169 bf = TRUE; 2170 break; 2171 } 2172 } 2173 return bf; 2174 } 2175 2176 /* 2177 * Return a Boolean based on setting of a knob. 2178 * 2179 * If the knob is not set, the supplied default is the return value. 2180 * If set, anything that looks or smells like "No", "False", "Off", "0" etc, 2181 * is FALSE, otherwise TRUE. 2182 */ 2183 Boolean 2184 getBoolean(const char *name, Boolean fallback) 2185 { 2186 char *expr = str_concat3("${", name, ":U:tl}"); 2187 char *value; 2188 Boolean res; 2189 2190 (void)Var_Subst(expr, VAR_GLOBAL, VARE_WANTRES, &value); 2191 /* TODO: handle errors */ 2192 res = s2Boolean(value, fallback); 2193 free(value); 2194 free(expr); 2195 return res; 2196 } 2197
Indexes created Mon Sep 22 13:09:51 GMT 2025