main.c revision 1.348
1 /* $NetBSD: main.c,v 1.348 2020/09/26 17:15:20 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 1.348 2020/09/26 17:15:20 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_option_F(const char *modules) 227 { 228 const char *mode; 229 size_t len; 230 char *fname; 231 232 if (debug_file != stdout && debug_file != stderr) 233 fclose(debug_file); 234 235 if (*modules == '+') { 236 modules++; 237 mode = "a"; 238 } else 239 mode = "w"; 240 241 if (strcmp(modules, "stdout") == 0) { 242 debug_file = stdout; 243 return; 244 } 245 if (strcmp(modules, "stderr") == 0) { 246 debug_file = stderr; 247 return; 248 } 249 250 len = strlen(modules); 251 fname = bmake_malloc(len + 20); 252 memcpy(fname, modules, len + 1); 253 254 /* Let the filename be modified by the pid */ 255 if (strcmp(fname + len - 3, ".%d") == 0) 256 snprintf(fname + len - 2, 20, "%d", getpid()); 257 258 debug_file = fopen(fname, mode); 259 if (!debug_file) { 260 fprintf(stderr, "Cannot open debug file %s\n", 261 fname); 262 usage(); 263 } 264 free(fname); 265 } 266 267 static void 268 parse_debug_options(const char *argvalue) 269 { 270 const char *modules; 271 272 for (modules = argvalue; *modules; ++modules) { 273 switch (*modules) { 274 case 'A': 275 debug = ~(0|DEBUG_LINT); 276 break; 277 case 'a': 278 debug |= DEBUG_ARCH; 279 break; 280 case 'C': 281 debug |= DEBUG_CWD; 282 break; 283 case 'c': 284 debug |= DEBUG_COND; 285 break; 286 case 'd': 287 debug |= DEBUG_DIR; 288 break; 289 case 'e': 290 debug |= DEBUG_ERROR; 291 break; 292 case 'f': 293 debug |= DEBUG_FOR; 294 break; 295 case 'g': 296 if (modules[1] == '1') { 297 debug |= DEBUG_GRAPH1; 298 ++modules; 299 } 300 else if (modules[1] == '2') { 301 debug |= DEBUG_GRAPH2; 302 ++modules; 303 } 304 else if (modules[1] == '3') { 305 debug |= DEBUG_GRAPH3; 306 ++modules; 307 } 308 break; 309 case 'h': 310 debug |= DEBUG_HASH; 311 break; 312 case 'j': 313 debug |= DEBUG_JOB; 314 break; 315 case 'L': 316 debug |= DEBUG_LINT; 317 break; 318 case 'l': 319 debug |= DEBUG_LOUD; 320 break; 321 case 'M': 322 debug |= DEBUG_META; 323 break; 324 case 'm': 325 debug |= DEBUG_MAKE; 326 break; 327 case 'n': 328 debug |= DEBUG_SCRIPT; 329 break; 330 case 'p': 331 debug |= DEBUG_PARSE; 332 break; 333 case 's': 334 debug |= DEBUG_SUFF; 335 break; 336 case 't': 337 debug |= DEBUG_TARG; 338 break; 339 case 'V': 340 debugVflag = TRUE; 341 break; 342 case 'v': 343 debug |= DEBUG_VAR; 344 break; 345 case 'x': 346 debug |= DEBUG_SHELL; 347 break; 348 case 'F': 349 parse_debug_option_F(modules + 1); 350 goto debug_setbuf; 351 default: 352 (void)fprintf(stderr, 353 "%s: illegal argument to d option -- %c\n", 354 progname, *modules); 355 usage(); 356 } 357 } 358 debug_setbuf: 359 /* 360 * Make the debug_file unbuffered, and make 361 * stdout line buffered (unless debugfile == stdout). 362 */ 363 setvbuf(debug_file, NULL, _IONBF, 0); 364 if (debug_file != stdout) { 365 setvbuf(stdout, NULL, _IOLBF, 0); 366 } 367 } 368 369 /* 370 * does path contain any relative components 371 */ 372 static Boolean 373 is_relpath(const char *path) 374 { 375 const char *cp; 376 377 if (path[0] != '/') 378 return TRUE; 379 cp = path; 380 while ((cp = strstr(cp, "/.")) != NULL) { 381 cp += 2; 382 if (cp[0] == '/' || cp[0] == '\0') 383 return TRUE; 384 else if (cp[0] == '.') { 385 if (cp[1] == '/' || cp[1] == '\0') 386 return TRUE; 387 } 388 } 389 return FALSE; 390 } 391 392 /* Parse the given arguments. Called from main() and from 393 * Main_ParseArgLine() when the .MAKEFLAGS target is used. 394 * 395 * The arguments must be treated as read-only and will be freed after the 396 * call. 397 * 398 * XXX: Deal with command line overriding .MAKEFLAGS in makefile */ 399 static void 400 MainParseArgs(int argc, char **argv) 401 { 402 char *p; 403 char c = '?'; 404 int arginc; 405 char *argvalue; 406 const char *getopt_def; 407 struct stat sa, sb; 408 char *optscan; 409 Boolean inOption, dashDash = FALSE; 410 char found_path[MAXPATHLEN + 1]; /* for searching for sys.mk */ 411 412 #define OPTFLAGS "BC:D:I:J:NST:V:WXd:ef:ij:km:nqrstv:w" 413 /* Can't actually use getopt(3) because rescanning is not portable */ 414 415 getopt_def = OPTFLAGS; 416 rearg: 417 inOption = FALSE; 418 optscan = NULL; 419 while(argc > 1) { 420 char *getopt_spec; 421 if(!inOption) 422 optscan = argv[1]; 423 c = *optscan++; 424 arginc = 0; 425 if(inOption) { 426 if(c == '\0') { 427 ++argv; 428 --argc; 429 inOption = FALSE; 430 continue; 431 } 432 } else { 433 if (c != '-' || dashDash) 434 break; 435 inOption = TRUE; 436 c = *optscan++; 437 } 438 /* '-' found at some earlier point */ 439 getopt_spec = strchr(getopt_def, c); 440 if(c != '\0' && getopt_spec != NULL && getopt_spec[1] == ':') { 441 /* -<something> found, and <something> should have an arg */ 442 inOption = FALSE; 443 arginc = 1; 444 argvalue = optscan; 445 if(*argvalue == '\0') { 446 if (argc < 3) 447 goto noarg; 448 argvalue = argv[2]; 449 arginc = 2; 450 } 451 } else { 452 argvalue = NULL; 453 } 454 switch(c) { 455 case '\0': 456 arginc = 1; 457 inOption = FALSE; 458 break; 459 case 'B': 460 compatMake = TRUE; 461 Var_Append(MAKEFLAGS, "-B", VAR_GLOBAL); 462 Var_Set(MAKE_MODE, "compat", VAR_GLOBAL); 463 break; 464 case 'C': 465 if (chdir(argvalue) == -1) { 466 (void)fprintf(stderr, 467 "%s: chdir %s: %s\n", 468 progname, argvalue, 469 strerror(errno)); 470 exit(1); 471 } 472 if (getcwd(curdir, MAXPATHLEN) == NULL) { 473 (void)fprintf(stderr, "%s: %s.\n", progname, strerror(errno)); 474 exit(2); 475 } 476 if (!is_relpath(argvalue) && 477 stat(argvalue, &sa) != -1 && 478 stat(curdir, &sb) != -1 && 479 sa.st_ino == sb.st_ino && 480 sa.st_dev == sb.st_dev) 481 strncpy(curdir, argvalue, MAXPATHLEN); 482 ignorePWD = TRUE; 483 break; 484 case 'D': 485 if (argvalue == NULL || argvalue[0] == 0) goto noarg; 486 Var_Set(argvalue, "1", VAR_GLOBAL); 487 Var_Append(MAKEFLAGS, "-D", VAR_GLOBAL); 488 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 489 break; 490 case 'I': 491 if (argvalue == NULL) goto noarg; 492 Parse_AddIncludeDir(argvalue); 493 Var_Append(MAKEFLAGS, "-I", VAR_GLOBAL); 494 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 495 break; 496 case 'J': 497 if (argvalue == NULL) goto noarg; 498 if (sscanf(argvalue, "%d,%d", &jp_0, &jp_1) != 2) { 499 (void)fprintf(stderr, 500 "%s: internal error -- J option malformed (%s)\n", 501 progname, argvalue); 502 usage(); 503 } 504 if ((fcntl(jp_0, F_GETFD, 0) < 0) || 505 (fcntl(jp_1, F_GETFD, 0) < 0)) { 506 #if 0 507 (void)fprintf(stderr, 508 "%s: ###### warning -- J descriptors were closed!\n", 509 progname); 510 exit(2); 511 #endif 512 jp_0 = -1; 513 jp_1 = -1; 514 compatMake = TRUE; 515 } else { 516 Var_Append(MAKEFLAGS, "-J", VAR_GLOBAL); 517 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 518 } 519 break; 520 case 'N': 521 noExecute = TRUE; 522 noRecursiveExecute = TRUE; 523 Var_Append(MAKEFLAGS, "-N", VAR_GLOBAL); 524 break; 525 case 'S': 526 keepgoing = FALSE; 527 Var_Append(MAKEFLAGS, "-S", VAR_GLOBAL); 528 break; 529 case 'T': 530 if (argvalue == NULL) goto noarg; 531 tracefile = bmake_strdup(argvalue); 532 Var_Append(MAKEFLAGS, "-T", VAR_GLOBAL); 533 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 534 break; 535 case 'V': 536 case 'v': 537 if (argvalue == NULL) goto noarg; 538 printVars = c == 'v' ? EXPAND_VARS : COMPAT_VARS; 539 Lst_Append(variables, bmake_strdup(argvalue)); 540 Var_Append(MAKEFLAGS, "-V", VAR_GLOBAL); 541 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 542 break; 543 case 'W': 544 parseWarnFatal = TRUE; 545 break; 546 case 'X': 547 varNoExportEnv = TRUE; 548 Var_Append(MAKEFLAGS, "-X", VAR_GLOBAL); 549 break; 550 case 'd': 551 if (argvalue == NULL) goto noarg; 552 /* If '-d-opts' don't pass to children */ 553 if (argvalue[0] == '-') 554 argvalue++; 555 else { 556 Var_Append(MAKEFLAGS, "-d", VAR_GLOBAL); 557 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 558 } 559 parse_debug_options(argvalue); 560 break; 561 case 'e': 562 checkEnvFirst = TRUE; 563 Var_Append(MAKEFLAGS, "-e", VAR_GLOBAL); 564 break; 565 case 'f': 566 if (argvalue == NULL) goto noarg; 567 Lst_Append(makefiles, bmake_strdup(argvalue)); 568 break; 569 case 'i': 570 ignoreErrors = TRUE; 571 Var_Append(MAKEFLAGS, "-i", VAR_GLOBAL); 572 break; 573 case 'j': 574 if (argvalue == NULL) goto noarg; 575 forceJobs = TRUE; 576 maxJobs = strtol(argvalue, &p, 0); 577 if (*p != '\0' || maxJobs < 1) { 578 (void)fprintf(stderr, "%s: illegal argument to -j -- must be positive integer!\n", 579 progname); 580 exit(1); 581 } 582 Var_Append(MAKEFLAGS, "-j", VAR_GLOBAL); 583 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 584 Var_Set(".MAKE.JOBS", argvalue, VAR_GLOBAL); 585 maxJobTokens = maxJobs; 586 break; 587 case 'k': 588 keepgoing = TRUE; 589 Var_Append(MAKEFLAGS, "-k", VAR_GLOBAL); 590 break; 591 case 'm': 592 if (argvalue == NULL) goto noarg; 593 /* look for magic parent directory search string */ 594 if (strncmp(".../", argvalue, 4) == 0) { 595 if (!Dir_FindHereOrAbove(curdir, argvalue+4, 596 found_path, sizeof(found_path))) 597 break; /* nothing doing */ 598 (void)Dir_AddDir(sysIncPath, found_path); 599 } else { 600 (void)Dir_AddDir(sysIncPath, argvalue); 601 } 602 Var_Append(MAKEFLAGS, "-m", VAR_GLOBAL); 603 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 604 break; 605 case 'n': 606 noExecute = TRUE; 607 Var_Append(MAKEFLAGS, "-n", VAR_GLOBAL); 608 break; 609 case 'q': 610 queryFlag = TRUE; 611 /* Kind of nonsensical, wot? */ 612 Var_Append(MAKEFLAGS, "-q", VAR_GLOBAL); 613 break; 614 case 'r': 615 noBuiltins = TRUE; 616 Var_Append(MAKEFLAGS, "-r", VAR_GLOBAL); 617 break; 618 case 's': 619 beSilent = TRUE; 620 Var_Append(MAKEFLAGS, "-s", VAR_GLOBAL); 621 break; 622 case 't': 623 touchFlag = TRUE; 624 Var_Append(MAKEFLAGS, "-t", VAR_GLOBAL); 625 break; 626 case 'w': 627 enterFlag = TRUE; 628 Var_Append(MAKEFLAGS, "-w", VAR_GLOBAL); 629 break; 630 case '-': 631 dashDash = TRUE; 632 break; 633 default: 634 case '?': 635 usage(); 636 } 637 argv += arginc; 638 argc -= arginc; 639 } 640 641 oldVars = TRUE; 642 643 /* 644 * See if the rest of the arguments are variable assignments and 645 * perform them if so. Else take them to be targets and stuff them 646 * on the end of the "create" list. 647 */ 648 for (; argc > 1; ++argv, --argc) 649 if (Parse_IsVar(argv[1])) { 650 Parse_DoVar(argv[1], VAR_CMD); 651 } else { 652 if (!*argv[1]) 653 Punt("illegal (null) argument."); 654 if (*argv[1] == '-' && !dashDash) 655 goto rearg; 656 Lst_Append(create, bmake_strdup(argv[1])); 657 } 658 659 return; 660 noarg: 661 (void)fprintf(stderr, "%s: option requires an argument -- %c\n", 662 progname, c); 663 usage(); 664 } 665 666 /*- 667 * Main_ParseArgLine -- 668 * Used by the parse module when a .MFLAGS or .MAKEFLAGS target 669 * is encountered and by main() when reading the .MAKEFLAGS envariable. 670 * Takes a line of arguments and breaks it into its 671 * component words and passes those words and the number of them to the 672 * MainParseArgs function. 673 * The line should have all its leading whitespace removed. 674 * 675 * Input: 676 * line Line to fracture 677 * 678 * Results: 679 * None 680 * 681 * Side Effects: 682 * Only those that come from the various arguments. 683 */ 684 void 685 Main_ParseArgLine(const char *line) 686 { 687 Words words; 688 char *p1; 689 const char *argv0 = Var_Value(".MAKE", VAR_GLOBAL, &p1); 690 char *buf; 691 692 if (line == NULL) 693 return; 694 for (; *line == ' '; ++line) 695 continue; 696 if (!*line) 697 return; 698 699 buf = str_concat3(argv0, " ", line); 700 free(p1); 701 702 words = Str_Words(buf, TRUE); 703 if (words.words == NULL) { 704 Error("Unterminated quoted string [%s]", buf); 705 free(buf); 706 return; 707 } 708 free(buf); 709 MainParseArgs((int)words.len, words.words); 710 711 Words_Free(words); 712 } 713 714 Boolean 715 Main_SetObjdir(const char *fmt, ...) 716 { 717 struct stat sb; 718 char *path; 719 char buf[MAXPATHLEN + 1]; 720 char buf2[MAXPATHLEN + 1]; 721 Boolean rc = FALSE; 722 va_list ap; 723 724 va_start(ap, fmt); 725 vsnprintf(path = buf, MAXPATHLEN, fmt, ap); 726 va_end(ap); 727 728 if (path[0] != '/') { 729 snprintf(buf2, MAXPATHLEN, "%s/%s", curdir, path); 730 path = buf2; 731 } 732 733 /* look for the directory and try to chdir there */ 734 if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) { 735 if (chdir(path)) { 736 (void)fprintf(stderr, "make warning: %s: %s.\n", 737 path, strerror(errno)); 738 } else { 739 snprintf(objdir, sizeof objdir, "%s", path); 740 Var_Set(".OBJDIR", objdir, VAR_GLOBAL); 741 setenv("PWD", objdir, 1); 742 Dir_InitDot(); 743 purge_cached_realpaths(); 744 rc = TRUE; 745 if (enterFlag && strcmp(objdir, curdir) != 0) 746 enterFlagObj = TRUE; 747 } 748 } 749 750 return rc; 751 } 752 753 static Boolean 754 Main_SetVarObjdir(const char *var, const char *suffix) 755 { 756 char *path_freeIt; 757 const char *path = Var_Value(var, VAR_CMD, &path_freeIt); 758 const char *xpath; 759 char *xpath_freeIt; 760 761 if (path == NULL || path[0] == '\0') { 762 bmake_free(path_freeIt); 763 return FALSE; 764 } 765 766 /* expand variable substitutions */ 767 xpath = path; 768 xpath_freeIt = NULL; 769 if (strchr(path, '$') != 0) { 770 (void)Var_Subst(path, VAR_GLOBAL, VARE_WANTRES, &xpath_freeIt); 771 /* TODO: handle errors */ 772 xpath = xpath_freeIt; 773 } 774 775 (void)Main_SetObjdir("%s%s", xpath, suffix); 776 777 bmake_free(xpath_freeIt); 778 bmake_free(path_freeIt); 779 return TRUE; 780 } 781 782 /* Read and parse the makefile. 783 * Return TRUE if reading the makefile succeeded, for Lst_Find. */ 784 static Boolean 785 ReadMakefileSucceeded(const void *fname, const void *unused) 786 { 787 return ReadMakefile(fname) == 0; 788 } 789 790 /* Read and parse the makefile. 791 * Return TRUE if reading the makefile failed, for Lst_Find. */ 792 static Boolean 793 ReadMakefileFailed(const void *fname, const void *unused) 794 { 795 return ReadMakefile(fname) != 0; 796 } 797 798 int 799 str2Lst_Append(StringList *lp, char *str, const char *sep) 800 { 801 char *cp; 802 int n; 803 804 if (!sep) 805 sep = " \t"; 806 807 for (n = 0, cp = strtok(str, sep); cp; cp = strtok(NULL, sep)) { 808 Lst_Append(lp, cp); 809 n++; 810 } 811 return n; 812 } 813 814 #ifdef SIGINFO 815 /*ARGSUSED*/ 816 static void 817 siginfo(int signo MAKE_ATTR_UNUSED) 818 { 819 char dir[MAXPATHLEN]; 820 char str[2 * MAXPATHLEN]; 821 int len; 822 if (getcwd(dir, sizeof(dir)) == NULL) 823 return; 824 len = snprintf(str, sizeof(str), "%s: Working in: %s\n", progname, dir); 825 if (len > 0) 826 (void)write(STDERR_FILENO, str, (size_t)len); 827 } 828 #endif 829 830 /* 831 * Allow makefiles some control over the mode we run in. 832 */ 833 void 834 MakeMode(const char *mode) 835 { 836 char *mode_freeIt = NULL; 837 838 if (mode == NULL) { 839 (void)Var_Subst("${" MAKE_MODE ":tl}", 840 VAR_GLOBAL, VARE_WANTRES, &mode_freeIt); 841 /* TODO: handle errors */ 842 mode = mode_freeIt; 843 } 844 845 if (mode[0] != '\0') { 846 if (strstr(mode, "compat")) { 847 compatMake = TRUE; 848 forceJobs = FALSE; 849 } 850 #if USE_META 851 if (strstr(mode, "meta")) 852 meta_mode_init(mode); 853 #endif 854 } 855 856 free(mode_freeIt); 857 } 858 859 static void 860 doPrintVars(void) 861 { 862 StringListNode *ln; 863 Boolean expandVars; 864 865 if (printVars == EXPAND_VARS) 866 expandVars = TRUE; 867 else if (debugVflag) 868 expandVars = FALSE; 869 else 870 expandVars = getBoolean(".MAKE.EXPAND_VARIABLES", FALSE); 871 872 for (ln = variables->first; ln != NULL; ln = ln->next) { 873 const char *var = ln->datum; 874 const char *value; 875 char *p1; 876 877 if (strchr(var, '$')) { 878 (void)Var_Subst(var, VAR_GLOBAL, VARE_WANTRES, &p1); 879 /* TODO: handle errors */ 880 value = p1; 881 } else if (expandVars) { 882 char *expr = str_concat3("${", var, "}"); 883 (void)Var_Subst(expr, VAR_GLOBAL, VARE_WANTRES, &p1); 884 /* TODO: handle errors */ 885 value = p1; 886 free(expr); 887 } else { 888 value = Var_Value(var, VAR_GLOBAL, &p1); 889 } 890 printf("%s\n", value ? value : ""); 891 bmake_free(p1); 892 } 893 } 894 895 static Boolean 896 runTargets(void) 897 { 898 GNodeList *targs; /* target nodes to create -- passed to Make_Init */ 899 Boolean outOfDate; /* FALSE if all targets up to date */ 900 901 /* 902 * Have now read the entire graph and need to make a list of 903 * targets to create. If none was given on the command line, 904 * we consult the parsing module to find the main target(s) 905 * to create. 906 */ 907 if (Lst_IsEmpty(create)) 908 targs = Parse_MainName(); 909 else 910 targs = Targ_FindList(create); 911 912 if (!compatMake) { 913 /* 914 * Initialize job module before traversing the graph 915 * now that any .BEGIN and .END targets have been read. 916 * This is done only if the -q flag wasn't given 917 * (to prevent the .BEGIN from being executed should 918 * it exist). 919 */ 920 if (!queryFlag) { 921 Job_Init(); 922 jobsRunning = TRUE; 923 } 924 925 /* Traverse the graph, checking on all the targets */ 926 outOfDate = Make_Run(targs); 927 } else { 928 /* 929 * Compat_Init will take care of creating all the 930 * targets as well as initializing the module. 931 */ 932 Compat_Run(targs); 933 outOfDate = FALSE; 934 } 935 Lst_Free(targs); 936 return outOfDate; 937 } 938 939 /* 940 * Set up the .TARGETS variable to contain the list of targets to be 941 * created. If none specified, make the variable empty -- the parser 942 * will fill the thing in with the default or .MAIN target. 943 */ 944 static void 945 InitVarTargets(void) 946 { 947 StringListNode *ln; 948 949 if (Lst_IsEmpty(create)) { 950 Var_Set(".TARGETS", "", VAR_GLOBAL); 951 return; 952 } 953 954 for (ln = create->first; ln != NULL; ln = ln->next) { 955 char *name = ln->datum; 956 Var_Append(".TARGETS", name, VAR_GLOBAL); 957 } 958 } 959 960 /*- 961 * main -- 962 * The main function, for obvious reasons. Initializes variables 963 * and a few modules, then parses the arguments give it in the 964 * environment and on the command line. Reads the system makefile 965 * followed by either Makefile, makefile or the file given by the 966 * -f argument. Sets the .MAKEFLAGS PMake variable based on all the 967 * flags it has received by then uses either the Make or the Compat 968 * module to create the initial list of targets. 969 * 970 * Results: 971 * If -q was given, exits -1 if anything was out-of-date. Else it exits 972 * 0. 973 * 974 * Side Effects: 975 * The program exits when done. Targets are created. etc. etc. etc. 976 */ 977 int 978 main(int argc, char **argv) 979 { 980 Boolean outOfDate; /* FALSE if all targets up to date */ 981 struct stat sb, sa; 982 char *p1, *path; 983 char mdpath[MAXPATHLEN]; 984 const char *machine = getenv("MACHINE"); 985 const char *machine_arch = getenv("MACHINE_ARCH"); 986 char *syspath = getenv("MAKESYSPATH"); 987 StringList *sysMkPath; /* Path of sys.mk */ 988 char *cp = NULL, *start; 989 /* avoid faults on read-only strings */ 990 static char defsyspath[] = _PATH_DEFSYSPATH; 991 char found_path[MAXPATHLEN + 1]; /* for searching for sys.mk */ 992 struct timeval rightnow; /* to initialize random seed */ 993 struct utsname utsname; 994 995 /* default to writing debug to stderr */ 996 debug_file = stderr; 997 998 #ifdef SIGINFO 999 (void)bmake_signal(SIGINFO, siginfo); 1000 #endif 1001 /* 1002 * Set the seed to produce a different random sequence 1003 * on each program execution. 1004 */ 1005 gettimeofday(&rightnow, NULL); 1006 srandom(rightnow.tv_sec + rightnow.tv_usec); 1007 1008 if ((progname = strrchr(argv[0], '/')) != NULL) 1009 progname++; 1010 else 1011 progname = argv[0]; 1012 #if defined(MAKE_NATIVE) || (defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE)) 1013 /* 1014 * get rid of resource limit on file descriptors 1015 */ 1016 { 1017 struct rlimit rl; 1018 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 && 1019 rl.rlim_cur != rl.rlim_max) { 1020 rl.rlim_cur = rl.rlim_max; 1021 (void)setrlimit(RLIMIT_NOFILE, &rl); 1022 } 1023 } 1024 #endif 1025 1026 if (uname(&utsname) == -1) { 1027 (void)fprintf(stderr, "%s: uname failed (%s).\n", progname, 1028 strerror(errno)); 1029 exit(2); 1030 } 1031 1032 /* 1033 * Get the name of this type of MACHINE from utsname 1034 * so we can share an executable for similar machines. 1035 * (i.e. m68k: amiga hp300, mac68k, sun3, ...) 1036 * 1037 * Note that both MACHINE and MACHINE_ARCH are decided at 1038 * run-time. 1039 */ 1040 if (!machine) { 1041 #ifdef MAKE_NATIVE 1042 machine = utsname.machine; 1043 #else 1044 #ifdef MAKE_MACHINE 1045 machine = MAKE_MACHINE; 1046 #else 1047 machine = "unknown"; 1048 #endif 1049 #endif 1050 } 1051 1052 if (!machine_arch) { 1053 #ifdef MAKE_NATIVE 1054 static char machine_arch_buf[sizeof(utsname.machine)]; 1055 const int mib[2] = { CTL_HW, HW_MACHINE_ARCH }; 1056 size_t len = sizeof(machine_arch_buf); 1057 1058 if (sysctl(mib, __arraycount(mib), machine_arch_buf, 1059 &len, NULL, 0) < 0) { 1060 (void)fprintf(stderr, "%s: sysctl failed (%s).\n", progname, 1061 strerror(errno)); 1062 exit(2); 1063 } 1064 1065 machine_arch = machine_arch_buf; 1066 #else 1067 #ifndef MACHINE_ARCH 1068 #ifdef MAKE_MACHINE_ARCH 1069 machine_arch = MAKE_MACHINE_ARCH; 1070 #else 1071 machine_arch = "unknown"; 1072 #endif 1073 #else 1074 machine_arch = MACHINE_ARCH; 1075 #endif 1076 #endif 1077 } 1078 1079 myPid = getpid(); /* remember this for vFork() */ 1080 1081 /* 1082 * Just in case MAKEOBJDIR wants us to do something tricky. 1083 */ 1084 Var_Init(); /* Initialize the lists of variables for 1085 * parsing arguments */ 1086 Var_Set(".MAKE.OS", utsname.sysname, VAR_GLOBAL); 1087 Var_Set("MACHINE", machine, VAR_GLOBAL); 1088 Var_Set("MACHINE_ARCH", machine_arch, VAR_GLOBAL); 1089 #ifdef MAKE_VERSION 1090 Var_Set("MAKE_VERSION", MAKE_VERSION, VAR_GLOBAL); 1091 #endif 1092 Var_Set(".newline", "\n", VAR_GLOBAL); /* handy for :@ loops */ 1093 /* 1094 * This is the traditional preference for makefiles. 1095 */ 1096 #ifndef MAKEFILE_PREFERENCE_LIST 1097 # define MAKEFILE_PREFERENCE_LIST "makefile Makefile" 1098 #endif 1099 Var_Set(MAKEFILE_PREFERENCE, MAKEFILE_PREFERENCE_LIST, 1100 VAR_GLOBAL); 1101 Var_Set(MAKE_DEPENDFILE, ".depend", VAR_GLOBAL); 1102 1103 create = Lst_Init(); 1104 makefiles = Lst_Init(); 1105 printVars = 0; 1106 debugVflag = FALSE; 1107 variables = Lst_Init(); 1108 beSilent = FALSE; /* Print commands as executed */ 1109 ignoreErrors = FALSE; /* Pay attention to non-zero returns */ 1110 noExecute = FALSE; /* Execute all commands */ 1111 noRecursiveExecute = FALSE; /* Execute all .MAKE targets */ 1112 keepgoing = FALSE; /* Stop on error */ 1113 allPrecious = FALSE; /* Remove targets when interrupted */ 1114 deleteOnError = FALSE; /* Historical default behavior */ 1115 queryFlag = FALSE; /* This is not just a check-run */ 1116 noBuiltins = FALSE; /* Read the built-in rules */ 1117 touchFlag = FALSE; /* Actually update targets */ 1118 debug = 0; /* No debug verbosity, please. */ 1119 jobsRunning = FALSE; 1120 1121 maxJobs = DEFMAXLOCAL; /* Set default local max concurrency */ 1122 maxJobTokens = maxJobs; 1123 compatMake = FALSE; /* No compat mode */ 1124 ignorePWD = FALSE; 1125 1126 /* 1127 * Initialize the parsing, directory and variable modules to prepare 1128 * for the reading of inclusion paths and variable settings on the 1129 * command line 1130 */ 1131 1132 /* 1133 * Initialize various variables. 1134 * MAKE also gets this name, for compatibility 1135 * .MAKEFLAGS gets set to the empty string just in case. 1136 * MFLAGS also gets initialized empty, for compatibility. 1137 */ 1138 Parse_Init(); 1139 if (argv[0][0] == '/' || strchr(argv[0], '/') == NULL) { 1140 /* 1141 * Leave alone if it is an absolute path, or if it does 1142 * not contain a '/' in which case we need to find it in 1143 * the path, like execvp(3) and the shells do. 1144 */ 1145 p1 = argv[0]; 1146 } else { 1147 /* 1148 * A relative path, canonicalize it. 1149 */ 1150 p1 = cached_realpath(argv[0], mdpath); 1151 if (!p1 || *p1 != '/' || stat(p1, &sb) < 0) { 1152 p1 = argv[0]; /* realpath failed */ 1153 } 1154 } 1155 Var_Set("MAKE", p1, VAR_GLOBAL); 1156 Var_Set(".MAKE", p1, VAR_GLOBAL); 1157 Var_Set(MAKEFLAGS, "", VAR_GLOBAL); 1158 Var_Set(MAKEOVERRIDES, "", VAR_GLOBAL); 1159 Var_Set("MFLAGS", "", VAR_GLOBAL); 1160 Var_Set(".ALLTARGETS", "", VAR_GLOBAL); 1161 /* some makefiles need to know this */ 1162 Var_Set(MAKE_LEVEL ".ENV", MAKE_LEVEL_ENV, VAR_CMD); 1163 1164 /* 1165 * Set some other useful macros 1166 */ 1167 { 1168 char tmp[64], *ep; 1169 1170 makelevel = ((ep = getenv(MAKE_LEVEL_ENV)) && *ep) ? atoi(ep) : 0; 1171 if (makelevel < 0) 1172 makelevel = 0; 1173 snprintf(tmp, sizeof(tmp), "%d", makelevel); 1174 Var_Set(MAKE_LEVEL, tmp, VAR_GLOBAL); 1175 snprintf(tmp, sizeof(tmp), "%u", myPid); 1176 Var_Set(".MAKE.PID", tmp, VAR_GLOBAL); 1177 snprintf(tmp, sizeof(tmp), "%u", getppid()); 1178 Var_Set(".MAKE.PPID", tmp, VAR_GLOBAL); 1179 } 1180 if (makelevel > 0) { 1181 char pn[1024]; 1182 snprintf(pn, sizeof(pn), "%s[%d]", progname, makelevel); 1183 progname = bmake_strdup(pn); 1184 } 1185 1186 #ifdef USE_META 1187 meta_init(); 1188 #endif 1189 Dir_Init(); 1190 1191 /* 1192 * First snag any flags out of the MAKE environment variable. 1193 * (Note this is *not* MAKEFLAGS since /bin/make uses that and it's 1194 * in a different format). 1195 */ 1196 #ifdef POSIX 1197 p1 = explode(getenv("MAKEFLAGS")); 1198 Main_ParseArgLine(p1); 1199 free(p1); 1200 #else 1201 Main_ParseArgLine(getenv("MAKE")); 1202 #endif 1203 1204 /* 1205 * Find where we are (now). 1206 * We take care of PWD for the automounter below... 1207 */ 1208 if (getcwd(curdir, MAXPATHLEN) == NULL) { 1209 (void)fprintf(stderr, "%s: getcwd: %s.\n", 1210 progname, strerror(errno)); 1211 exit(2); 1212 } 1213 1214 MainParseArgs(argc, argv); 1215 1216 if (enterFlag) 1217 printf("%s: Entering directory `%s'\n", progname, curdir); 1218 1219 /* 1220 * Verify that cwd is sane. 1221 */ 1222 if (stat(curdir, &sa) == -1) { 1223 (void)fprintf(stderr, "%s: %s: %s.\n", 1224 progname, curdir, strerror(errno)); 1225 exit(2); 1226 } 1227 1228 /* 1229 * All this code is so that we know where we are when we start up 1230 * on a different machine with pmake. 1231 * Overriding getcwd() with $PWD totally breaks MAKEOBJDIRPREFIX 1232 * since the value of curdir can vary depending on how we got 1233 * here. Ie sitting at a shell prompt (shell that provides $PWD) 1234 * or via subdir.mk in which case its likely a shell which does 1235 * not provide it. 1236 * So, to stop it breaking this case only, we ignore PWD if 1237 * MAKEOBJDIRPREFIX is set or MAKEOBJDIR contains a transform. 1238 */ 1239 #ifndef NO_PWD_OVERRIDE 1240 if (!ignorePWD) { 1241 char *pwd, *ptmp1 = NULL, *ptmp2 = NULL; 1242 1243 if ((pwd = getenv("PWD")) != NULL && 1244 Var_Value("MAKEOBJDIRPREFIX", VAR_CMD, &ptmp1) == NULL) { 1245 const char *makeobjdir = Var_Value("MAKEOBJDIR", 1246 VAR_CMD, &ptmp2); 1247 1248 if (makeobjdir == NULL || !strchr(makeobjdir, '$')) { 1249 if (stat(pwd, &sb) == 0 && 1250 sa.st_ino == sb.st_ino && 1251 sa.st_dev == sb.st_dev) 1252 (void)strncpy(curdir, pwd, MAXPATHLEN); 1253 } 1254 } 1255 bmake_free(ptmp1); 1256 bmake_free(ptmp2); 1257 } 1258 #endif 1259 Var_Set(".CURDIR", curdir, VAR_GLOBAL); 1260 1261 /* 1262 * Find the .OBJDIR. If MAKEOBJDIRPREFIX, or failing that, 1263 * MAKEOBJDIR is set in the environment, try only that value 1264 * and fall back to .CURDIR if it does not exist. 1265 * 1266 * Otherwise, try _PATH_OBJDIR.MACHINE-MACHINE_ARCH, _PATH_OBJDIR.MACHINE, 1267 * and * finally _PATH_OBJDIRPREFIX`pwd`, in that order. If none 1268 * of these paths exist, just use .CURDIR. 1269 */ 1270 Dir_InitDir(curdir); 1271 (void)Main_SetObjdir("%s", curdir); 1272 1273 if (!Main_SetVarObjdir("MAKEOBJDIRPREFIX", curdir) && 1274 !Main_SetVarObjdir("MAKEOBJDIR", "") && 1275 !Main_SetObjdir("%s.%s-%s", _PATH_OBJDIR, machine, machine_arch) && 1276 !Main_SetObjdir("%s.%s", _PATH_OBJDIR, machine) && 1277 !Main_SetObjdir("%s", _PATH_OBJDIR)) 1278 (void)Main_SetObjdir("%s%s", _PATH_OBJDIRPREFIX, curdir); 1279 1280 /* 1281 * Initialize archive, target and suffix modules in preparation for 1282 * parsing the makefile(s) 1283 */ 1284 Arch_Init(); 1285 Targ_Init(); 1286 Suff_Init(); 1287 Trace_Init(tracefile); 1288 1289 DEFAULT = NULL; 1290 (void)time(&now); 1291 1292 Trace_Log(MAKESTART, NULL); 1293 1294 InitVarTargets(); 1295 1296 /* 1297 * If no user-supplied system path was given (through the -m option) 1298 * add the directories from the DEFSYSPATH (more than one may be given 1299 * as dir1:...:dirn) to the system include path. 1300 */ 1301 /* XXX: mismatch: the -m option sets sysIncPath, not syspath */ 1302 if (syspath == NULL || syspath[0] == '\0') 1303 syspath = defsyspath; 1304 else 1305 syspath = bmake_strdup(syspath); 1306 1307 for (start = syspath; *start != '\0'; start = cp) { 1308 for (cp = start; *cp != '\0' && *cp != ':'; cp++) 1309 continue; 1310 if (*cp == ':') { 1311 *cp++ = '\0'; 1312 } 1313 /* look for magic parent directory search string */ 1314 if (strncmp(".../", start, 4) != 0) { 1315 (void)Dir_AddDir(defIncPath, start); 1316 } else { 1317 if (Dir_FindHereOrAbove(curdir, start+4, 1318 found_path, sizeof(found_path))) { 1319 (void)Dir_AddDir(defIncPath, found_path); 1320 } 1321 } 1322 } 1323 if (syspath != defsyspath) 1324 free(syspath); 1325 1326 /* 1327 * Read in the built-in rules first, followed by the specified 1328 * makefiles, or the default makefile and Makefile, in that order, 1329 * if no makefiles were given on the command line. 1330 */ 1331 if (!noBuiltins) { 1332 StringListNode *ln; 1333 1334 sysMkPath = Lst_Init(); 1335 Dir_Expand(_PATH_DEFSYSMK, 1336 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath, 1337 sysMkPath); 1338 if (Lst_IsEmpty(sysMkPath)) 1339 Fatal("%s: no system rules (%s).", progname, 1340 _PATH_DEFSYSMK); 1341 ln = Lst_Find(sysMkPath, ReadMakefileSucceeded, NULL); 1342 if (ln == NULL) 1343 Fatal("%s: cannot open %s.", progname, 1344 (char *)LstNode_Datum(Lst_First(sysMkPath))); 1345 } 1346 1347 if (!Lst_IsEmpty(makefiles)) { 1348 StringListNode *ln; 1349 1350 ln = Lst_Find(makefiles, ReadMakefileFailed, NULL); 1351 if (ln != NULL) 1352 Fatal("%s: cannot open %s.", progname, 1353 (char *)LstNode_Datum(ln)); 1354 } else { 1355 (void)Var_Subst("${" MAKEFILE_PREFERENCE "}", 1356 VAR_CMD, VARE_WANTRES, &p1); 1357 /* TODO: handle errors */ 1358 (void)str2Lst_Append(makefiles, p1, NULL); 1359 (void)Lst_Find(makefiles, ReadMakefileSucceeded, NULL); 1360 free(p1); 1361 } 1362 1363 /* In particular suppress .depend for '-r -V .OBJDIR -f /dev/null' */ 1364 if (!noBuiltins || !printVars) { 1365 (void)Var_Subst("${.MAKE.DEPENDFILE:T}", 1366 VAR_CMD, VARE_WANTRES, &makeDependfile); 1367 /* TODO: handle errors */ 1368 doing_depend = TRUE; 1369 (void)ReadMakefile(makeDependfile); 1370 doing_depend = FALSE; 1371 } 1372 1373 if (enterFlagObj) 1374 printf("%s: Entering directory `%s'\n", progname, objdir); 1375 1376 MakeMode(NULL); 1377 1378 Var_Append("MFLAGS", Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1), VAR_GLOBAL); 1379 bmake_free(p1); 1380 1381 if (!forceJobs && !compatMake && 1382 Var_Exists(".MAKE.JOBS", VAR_GLOBAL)) { 1383 char *value; 1384 int n; 1385 1386 (void)Var_Subst("${.MAKE.JOBS}", VAR_GLOBAL, VARE_WANTRES, &value); 1387 /* TODO: handle errors */ 1388 n = strtol(value, NULL, 0); 1389 if (n < 1) { 1390 (void)fprintf(stderr, "%s: illegal value for .MAKE.JOBS -- must be positive integer!\n", 1391 progname); 1392 exit(1); 1393 } 1394 if (n != maxJobs) { 1395 Var_Append(MAKEFLAGS, "-j", VAR_GLOBAL); 1396 Var_Append(MAKEFLAGS, value, VAR_GLOBAL); 1397 } 1398 maxJobs = n; 1399 maxJobTokens = maxJobs; 1400 forceJobs = TRUE; 1401 free(value); 1402 } 1403 1404 /* 1405 * Be compatible if user did not specify -j and did not explicitly 1406 * turned compatibility on 1407 */ 1408 if (!compatMake && !forceJobs) { 1409 compatMake = TRUE; 1410 } 1411 1412 if (!compatMake) 1413 Job_ServerStart(maxJobTokens, jp_0, jp_1); 1414 if (DEBUG(JOB)) 1415 fprintf(debug_file, 1416 "job_pipe %d %d, maxjobs %d, tokens %d, compat %d\n", 1417 jp_0, jp_1, maxJobs, maxJobTokens, compatMake ? 1 : 0); 1418 1419 if (!printVars) 1420 Main_ExportMAKEFLAGS(TRUE); /* initial export */ 1421 1422 1423 /* 1424 * For compatibility, look at the directories in the VPATH variable 1425 * and add them to the search path, if the variable is defined. The 1426 * variable's value is in the same format as the PATH envariable, i.e. 1427 * <directory>:<directory>:<directory>... 1428 */ 1429 if (Var_Exists("VPATH", VAR_CMD)) { 1430 char *vpath, savec; 1431 /* 1432 * GCC stores string constants in read-only memory, but 1433 * Var_Subst will want to write this thing, so store it 1434 * in an array 1435 */ 1436 static char VPATH[] = "${VPATH}"; 1437 1438 (void)Var_Subst(VPATH, VAR_CMD, VARE_WANTRES, &vpath); 1439 /* TODO: handle errors */ 1440 path = vpath; 1441 do { 1442 /* skip to end of directory */ 1443 for (cp = path; *cp != ':' && *cp != '\0'; cp++) 1444 continue; 1445 /* Save terminator character so know when to stop */ 1446 savec = *cp; 1447 *cp = '\0'; 1448 /* Add directory to search path */ 1449 (void)Dir_AddDir(dirSearchPath, path); 1450 *cp = savec; 1451 path = cp + 1; 1452 } while (savec == ':'); 1453 free(vpath); 1454 } 1455 1456 /* 1457 * Now that all search paths have been read for suffixes et al, it's 1458 * time to add the default search path to their lists... 1459 */ 1460 Suff_DoPaths(); 1461 1462 /* 1463 * Propagate attributes through :: dependency lists. 1464 */ 1465 Targ_Propagate(); 1466 1467 /* print the initial graph, if the user requested it */ 1468 if (DEBUG(GRAPH1)) 1469 Targ_PrintGraph(1); 1470 1471 /* print the values of any variables requested by the user */ 1472 if (printVars) { 1473 doPrintVars(); 1474 outOfDate = FALSE; 1475 } else { 1476 outOfDate = runTargets(); 1477 } 1478 1479 #ifdef CLEANUP 1480 Lst_Free(variables); 1481 Lst_Free(makefiles); 1482 Lst_Destroy(create, free); 1483 #endif 1484 1485 /* print the graph now it's been processed if the user requested it */ 1486 if (DEBUG(GRAPH2)) 1487 Targ_PrintGraph(2); 1488 1489 Trace_Log(MAKEEND, 0); 1490 1491 if (enterFlagObj) 1492 printf("%s: Leaving directory `%s'\n", progname, objdir); 1493 if (enterFlag) 1494 printf("%s: Leaving directory `%s'\n", progname, curdir); 1495 1496 #ifdef USE_META 1497 meta_finish(); 1498 #endif 1499 Suff_End(); 1500 Targ_End(); 1501 Arch_End(); 1502 Var_End(); 1503 Parse_End(); 1504 Dir_End(); 1505 Job_End(); 1506 Trace_End(); 1507 1508 return outOfDate ? 1 : 0; 1509 } 1510 1511 /* Open and parse the given makefile, with all its side effects. 1512 * 1513 * Results: 1514 * 0 if ok. -1 if couldn't open file. 1515 */ 1516 static int 1517 ReadMakefile(const char *fname) 1518 { 1519 int fd; 1520 char *name, *path = NULL; 1521 1522 if (!strcmp(fname, "-")) { 1523 Parse_File(NULL /*stdin*/, -1); 1524 Var_Set("MAKEFILE", "", VAR_INTERNAL); 1525 } else { 1526 /* if we've chdir'd, rebuild the path name */ 1527 if (strcmp(curdir, objdir) && *fname != '/') { 1528 path = str_concat3(curdir, "/", fname); 1529 fd = open(path, O_RDONLY); 1530 if (fd != -1) { 1531 fname = path; 1532 goto found; 1533 } 1534 free(path); 1535 1536 /* If curdir failed, try objdir (ala .depend) */ 1537 path = str_concat3(objdir, "/", fname); 1538 fd = open(path, O_RDONLY); 1539 if (fd != -1) { 1540 fname = path; 1541 goto found; 1542 } 1543 } else { 1544 fd = open(fname, O_RDONLY); 1545 if (fd != -1) 1546 goto found; 1547 } 1548 /* look in -I and system include directories. */ 1549 name = Dir_FindFile(fname, parseIncPath); 1550 if (!name) 1551 name = Dir_FindFile(fname, 1552 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath); 1553 if (!name || (fd = open(name, O_RDONLY)) == -1) { 1554 free(name); 1555 free(path); 1556 return -1; 1557 } 1558 fname = name; 1559 /* 1560 * set the MAKEFILE variable desired by System V fans -- the 1561 * placement of the setting here means it gets set to the last 1562 * makefile specified, as it is set by SysV make. 1563 */ 1564 found: 1565 if (!doing_depend) 1566 Var_Set("MAKEFILE", fname, VAR_INTERNAL); 1567 Parse_File(fname, fd); 1568 } 1569 free(path); 1570 return 0; 1571 } 1572 1573 1574 1575 /*- 1576 * Cmd_Exec -- 1577 * Execute the command in cmd, and return the output of that command 1578 * in a string. In the output, newlines are replaced with spaces. 1579 * 1580 * Results: 1581 * A string containing the output of the command, or the empty string. 1582 * *errfmt returns a format string describing the command failure, 1583 * if any, using a single %s conversion specification. 1584 * 1585 * Side Effects: 1586 * The string must be freed by the caller. 1587 */ 1588 char * 1589 Cmd_Exec(const char *cmd, const char **errfmt) 1590 { 1591 const char *args[4]; /* Args for invoking the shell */ 1592 int fds[2]; /* Pipe streams */ 1593 int cpid; /* Child PID */ 1594 int pid; /* PID from wait() */ 1595 int status; /* command exit status */ 1596 Buffer buf; /* buffer to store the result */ 1597 ssize_t bytes_read; 1598 char *res; /* result */ 1599 size_t res_len; 1600 char *cp; 1601 int savederr; /* saved errno */ 1602 1603 *errfmt = NULL; 1604 1605 if (!shellName) 1606 Shell_Init(); 1607 /* 1608 * Set up arguments for shell 1609 */ 1610 args[0] = shellName; 1611 args[1] = "-c"; 1612 args[2] = cmd; 1613 args[3] = NULL; 1614 1615 /* 1616 * Open a pipe for fetching its output 1617 */ 1618 if (pipe(fds) == -1) { 1619 *errfmt = "Couldn't create pipe for \"%s\""; 1620 goto bad; 1621 } 1622 1623 /* 1624 * Fork 1625 */ 1626 switch (cpid = vFork()) { 1627 case 0: 1628 /* 1629 * Close input side of pipe 1630 */ 1631 (void)close(fds[0]); 1632 1633 /* 1634 * Duplicate the output stream to the shell's output, then 1635 * shut the extra thing down. Note we don't fetch the error 1636 * stream...why not? Why? 1637 */ 1638 (void)dup2(fds[1], 1); 1639 (void)close(fds[1]); 1640 1641 Var_ExportVars(); 1642 1643 (void)execv(shellPath, UNCONST(args)); 1644 _exit(1); 1645 /*NOTREACHED*/ 1646 1647 case -1: 1648 *errfmt = "Couldn't exec \"%s\""; 1649 goto bad; 1650 1651 default: 1652 /* 1653 * No need for the writing half 1654 */ 1655 (void)close(fds[1]); 1656 1657 savederr = 0; 1658 Buf_Init(&buf, 0); 1659 1660 do { 1661 char result[BUFSIZ]; 1662 bytes_read = read(fds[0], result, sizeof(result)); 1663 if (bytes_read > 0) 1664 Buf_AddBytes(&buf, result, (size_t)bytes_read); 1665 } 1666 while (bytes_read > 0 || (bytes_read == -1 && errno == EINTR)); 1667 if (bytes_read == -1) 1668 savederr = errno; 1669 1670 /* 1671 * Close the input side of the pipe. 1672 */ 1673 (void)close(fds[0]); 1674 1675 /* 1676 * Wait for the process to exit. 1677 */ 1678 while(((pid = waitpid(cpid, &status, 0)) != cpid) && (pid >= 0)) { 1679 JobReapChild(pid, status, FALSE); 1680 continue; 1681 } 1682 res_len = Buf_Size(&buf); 1683 res = Buf_Destroy(&buf, FALSE); 1684 1685 if (savederr != 0) 1686 *errfmt = "Couldn't read shell's output for \"%s\""; 1687 1688 if (WIFSIGNALED(status)) 1689 *errfmt = "\"%s\" exited on a signal"; 1690 else if (WEXITSTATUS(status) != 0) 1691 *errfmt = "\"%s\" returned non-zero status"; 1692 1693 /* Convert newlines to spaces. A final newline is just stripped */ 1694 if (res_len > 0 && res[res_len - 1] == '\n') 1695 res[res_len - 1] = '\0'; 1696 for (cp = res; *cp != '\0'; cp++) 1697 if (*cp == '\n') 1698 *cp = ' '; 1699 break; 1700 } 1701 return res; 1702 bad: 1703 return bmake_strdup(""); 1704 } 1705 1706 /*- 1707 * Error -- 1708 * Print an error message given its format. 1709 * 1710 * Results: 1711 * None. 1712 * 1713 * Side Effects: 1714 * The message is printed. 1715 */ 1716 void 1717 Error(const char *fmt, ...) 1718 { 1719 va_list ap; 1720 FILE *err_file; 1721 1722 err_file = debug_file; 1723 if (err_file == stdout) 1724 err_file = stderr; 1725 (void)fflush(stdout); 1726 for (;;) { 1727 va_start(ap, fmt); 1728 fprintf(err_file, "%s: ", progname); 1729 (void)vfprintf(err_file, fmt, ap); 1730 va_end(ap); 1731 (void)fprintf(err_file, "\n"); 1732 (void)fflush(err_file); 1733 if (err_file == stderr) 1734 break; 1735 err_file = stderr; 1736 } 1737 } 1738 1739 /* Produce a Fatal error message, then exit immediately. 1740 * 1741 * If jobs are running, waits for them to finish. */ 1742 void 1743 Fatal(const char *fmt, ...) 1744 { 1745 va_list ap; 1746 1747 va_start(ap, fmt); 1748 if (jobsRunning) 1749 Job_Wait(); 1750 1751 (void)fflush(stdout); 1752 (void)vfprintf(stderr, fmt, ap); 1753 va_end(ap); 1754 (void)fprintf(stderr, "\n"); 1755 (void)fflush(stderr); 1756 1757 PrintOnError(NULL, NULL); 1758 1759 if (DEBUG(GRAPH2) || DEBUG(GRAPH3)) 1760 Targ_PrintGraph(2); 1761 Trace_Log(MAKEERROR, 0); 1762 exit(2); /* Not 1 so -q can distinguish error */ 1763 } 1764 1765 /* 1766 * Punt -- 1767 * Major exception once jobs are being created. Kills all jobs, prints 1768 * a message and exits. 1769 * 1770 * Results: 1771 * None 1772 * 1773 * Side Effects: 1774 * All children are killed indiscriminately and the program Lib_Exits 1775 */ 1776 void 1777 Punt(const char *fmt, ...) 1778 { 1779 va_list ap; 1780 1781 va_start(ap, fmt); 1782 (void)fflush(stdout); 1783 (void)fprintf(stderr, "%s: ", progname); 1784 (void)vfprintf(stderr, fmt, ap); 1785 va_end(ap); 1786 (void)fprintf(stderr, "\n"); 1787 (void)fflush(stderr); 1788 1789 PrintOnError(NULL, NULL); 1790 1791 DieHorribly(); 1792 } 1793 1794 /*- 1795 * DieHorribly -- 1796 * Exit without giving a message. 1797 * 1798 * Results: 1799 * None 1800 * 1801 * Side Effects: 1802 * A big one... 1803 */ 1804 void 1805 DieHorribly(void) 1806 { 1807 if (jobsRunning) 1808 Job_AbortAll(); 1809 if (DEBUG(GRAPH2)) 1810 Targ_PrintGraph(2); 1811 Trace_Log(MAKEERROR, 0); 1812 exit(2); /* Not 1, so -q can distinguish error */ 1813 } 1814 1815 /* 1816 * Finish -- 1817 * Called when aborting due to errors in child shell to signal 1818 * abnormal exit. 1819 * 1820 * Results: 1821 * None 1822 * 1823 * Side Effects: 1824 * The program exits 1825 */ 1826 void 1827 Finish(int errors) 1828 /* number of errors encountered in Make_Make */ 1829 { 1830 if (dieQuietly(NULL, -1)) 1831 exit(2); 1832 Fatal("%d error%s", errors, errors == 1 ? "" : "s"); 1833 } 1834 1835 /* 1836 * eunlink -- 1837 * Remove a file carefully, avoiding directories. 1838 */ 1839 int 1840 eunlink(const char *file) 1841 { 1842 struct stat st; 1843 1844 if (lstat(file, &st) == -1) 1845 return -1; 1846 1847 if (S_ISDIR(st.st_mode)) { 1848 errno = EISDIR; 1849 return -1; 1850 } 1851 return unlink(file); 1852 } 1853 1854 /* 1855 * execError -- 1856 * Print why exec failed, avoiding stdio. 1857 */ 1858 void 1859 execError(const char *af, const char *av) 1860 { 1861 #ifdef USE_IOVEC 1862 int i = 0; 1863 struct iovec iov[8]; 1864 #define IOADD(s) \ 1865 (void)(iov[i].iov_base = UNCONST(s), \ 1866 iov[i].iov_len = strlen(iov[i].iov_base), \ 1867 i++) 1868 #else 1869 #define IOADD(void)write(2, s, strlen(s)) 1870 #endif 1871 1872 IOADD(progname); 1873 IOADD(": "); 1874 IOADD(af); 1875 IOADD("("); 1876 IOADD(av); 1877 IOADD(") failed ("); 1878 IOADD(strerror(errno)); 1879 IOADD(")\n"); 1880 1881 #ifdef USE_IOVEC 1882 while (writev(2, iov, 8) == -1 && errno == EAGAIN) 1883 continue; 1884 #endif 1885 } 1886 1887 /* 1888 * usage -- 1889 * exit with usage message 1890 */ 1891 static void 1892 usage(void) 1893 { 1894 char *p; 1895 if ((p = strchr(progname, '[')) != NULL) 1896 *p = '\0'; 1897 1898 (void)fprintf(stderr, 1899 "usage: %s [-BeikNnqrstWwX] \n" 1900 " [-C directory] [-D variable] [-d flags] [-f makefile]\n" 1901 " [-I directory] [-J private] [-j max_jobs] [-m directory] [-T file]\n" 1902 " [-V variable] [-v variable] [variable=value] [target ...]\n", 1903 progname); 1904 exit(2); 1905 } 1906 1907 /* 1908 * realpath(3) can get expensive, cache results... 1909 */ 1910 static GNode *cached_realpaths = NULL; 1911 1912 static GNode * 1913 get_cached_realpaths(void) 1914 { 1915 1916 if (!cached_realpaths) { 1917 cached_realpaths = Targ_NewGN("Realpath"); 1918 #ifndef DEBUG_REALPATH_CACHE 1919 cached_realpaths->flags = INTERNAL; 1920 #endif 1921 } 1922 1923 return cached_realpaths; 1924 } 1925 1926 /* purge any relative paths */ 1927 static void 1928 purge_cached_realpaths(void) 1929 { 1930 GNode *cache = get_cached_realpaths(); 1931 Hash_Entry *he, *nhe; 1932 Hash_Search hs; 1933 1934 he = Hash_EnumFirst(&cache->context, &hs); 1935 while (he) { 1936 nhe = Hash_EnumNext(&hs); 1937 if (he->name[0] != '/') { 1938 if (DEBUG(DIR)) 1939 fprintf(stderr, "cached_realpath: purging %s\n", he->name); 1940 Hash_DeleteEntry(&cache->context, he); 1941 } 1942 he = nhe; 1943 } 1944 } 1945 1946 char * 1947 cached_realpath(const char *pathname, char *resolved) 1948 { 1949 GNode *cache; 1950 const char *rp; 1951 char *cp; 1952 1953 if (!pathname || !pathname[0]) 1954 return NULL; 1955 1956 cache = get_cached_realpaths(); 1957 1958 if ((rp = Var_Value(pathname, cache, &cp)) != NULL) { 1959 /* a hit */ 1960 strncpy(resolved, rp, MAXPATHLEN); 1961 resolved[MAXPATHLEN - 1] = '\0'; 1962 } else if ((rp = realpath(pathname, resolved)) != NULL) { 1963 Var_Set(pathname, rp, cache); 1964 } /* else should we negative-cache? */ 1965 1966 bmake_free(cp); 1967 return rp ? resolved : NULL; 1968 } 1969 1970 1971 static int 1972 addErrorCMD(void *cmdp, void *unused) 1973 { 1974 if (cmdp == NULL) 1975 return 1; /* stop */ 1976 Var_Append(".ERROR_CMD", cmdp, VAR_GLOBAL); 1977 return 0; 1978 } 1979 1980 /* 1981 * Return true if we should die without noise. 1982 * For example our failing child was a sub-make 1983 * or failure happend elsewhere. 1984 */ 1985 int 1986 dieQuietly(GNode *gn, int bf) 1987 { 1988 static int quietly = -1; 1989 1990 if (quietly < 0) { 1991 if (DEBUG(JOB) || getBoolean(".MAKE.DIE_QUIETLY", 1) == 0) 1992 quietly = 0; 1993 else if (bf >= 0) 1994 quietly = bf; 1995 else 1996 quietly = (gn) ? ((gn->type & (OP_MAKE)) != 0) : 0; 1997 } 1998 return quietly; 1999 } 2000 2001 void 2002 PrintOnError(GNode *gn, const char *s) 2003 { 2004 static GNode *en = NULL; 2005 const char *expr; 2006 char *cp; 2007 2008 if (DEBUG(HASH)) { 2009 Targ_Stats(); 2010 Var_Stats(); 2011 } 2012 2013 /* we generally want to keep quiet if a sub-make died */ 2014 if (dieQuietly(gn, -1)) 2015 return; 2016 2017 if (s) 2018 printf("%s", s); 2019 2020 printf("\n%s: stopped in %s\n", progname, curdir); 2021 2022 if (en) 2023 return; /* we've been here! */ 2024 if (gn) { 2025 /* 2026 * We can print this even if there is no .ERROR target. 2027 */ 2028 Var_Set(".ERROR_TARGET", gn->name, VAR_GLOBAL); 2029 Var_Delete(".ERROR_CMD", VAR_GLOBAL); 2030 Lst_ForEachUntil(gn->commands, addErrorCMD, gn); 2031 } 2032 expr = "${MAKE_PRINT_VAR_ON_ERROR:@v@$v='${$v}'\n@}"; 2033 (void)Var_Subst(expr, VAR_GLOBAL, VARE_WANTRES, &cp); 2034 /* TODO: handle errors */ 2035 printf("%s", cp); 2036 free(cp); 2037 fflush(stdout); 2038 2039 /* 2040 * Finally, see if there is a .ERROR target, and run it if so. 2041 */ 2042 en = Targ_FindNode(".ERROR"); 2043 if (en) { 2044 en->type |= OP_SPECIAL; 2045 Compat_Make(en, en); 2046 } 2047 } 2048 2049 void 2050 Main_ExportMAKEFLAGS(Boolean first) 2051 { 2052 static Boolean once = TRUE; 2053 const char *expr; 2054 char *s; 2055 2056 if (once != first) 2057 return; 2058 once = FALSE; 2059 2060 expr = "${.MAKEFLAGS} ${.MAKEOVERRIDES:O:u:@v@$v=${$v:Q}@}"; 2061 (void)Var_Subst(expr, VAR_CMD, VARE_WANTRES, &s); 2062 /* TODO: handle errors */ 2063 if (s[0] != '\0') { 2064 #ifdef POSIX 2065 setenv("MAKEFLAGS", s, 1); 2066 #else 2067 setenv("MAKE", s, 1); 2068 #endif 2069 } 2070 } 2071 2072 char * 2073 getTmpdir(void) 2074 { 2075 static char *tmpdir = NULL; 2076 2077 if (!tmpdir) { 2078 struct stat st; 2079 2080 /* 2081 * Honor $TMPDIR but only if it is valid. 2082 * Ensure it ends with /. 2083 */ 2084 (void)Var_Subst("${TMPDIR:tA:U" _PATH_TMP "}/", VAR_GLOBAL, 2085 VARE_WANTRES, &tmpdir); 2086 /* TODO: handle errors */ 2087 if (stat(tmpdir, &st) < 0 || !S_ISDIR(st.st_mode)) { 2088 free(tmpdir); 2089 tmpdir = bmake_strdup(_PATH_TMP); 2090 } 2091 } 2092 return tmpdir; 2093 } 2094 2095 /* 2096 * Create and open a temp file using "pattern". 2097 * If "fnamep" is provided set it to a copy of the filename created. 2098 * Otherwise unlink the file once open. 2099 */ 2100 int 2101 mkTempFile(const char *pattern, char **fnamep) 2102 { 2103 static char *tmpdir = NULL; 2104 char tfile[MAXPATHLEN]; 2105 int fd; 2106 2107 if (!pattern) 2108 pattern = TMPPAT; 2109 if (!tmpdir) 2110 tmpdir = getTmpdir(); 2111 if (pattern[0] == '/') { 2112 snprintf(tfile, sizeof(tfile), "%s", pattern); 2113 } else { 2114 snprintf(tfile, sizeof(tfile), "%s%s", tmpdir, pattern); 2115 } 2116 if ((fd = mkstemp(tfile)) < 0) 2117 Punt("Could not create temporary file %s: %s", tfile, strerror(errno)); 2118 if (fnamep) { 2119 *fnamep = bmake_strdup(tfile); 2120 } else { 2121 unlink(tfile); /* we just want the descriptor */ 2122 } 2123 return fd; 2124 } 2125 2126 /* 2127 * Convert a string representation of a boolean. 2128 * Anything that looks like "No", "False", "Off", "0" etc, 2129 * is FALSE, otherwise TRUE. 2130 */ 2131 Boolean 2132 s2Boolean(const char *s, Boolean bf) 2133 { 2134 if (s) { 2135 switch(*s) { 2136 case '\0': /* not set - the default wins */ 2137 break; 2138 case '0': 2139 case 'F': 2140 case 'f': 2141 case 'N': 2142 case 'n': 2143 bf = FALSE; 2144 break; 2145 case 'O': 2146 case 'o': 2147 switch (s[1]) { 2148 case 'F': 2149 case 'f': 2150 bf = FALSE; 2151 break; 2152 default: 2153 bf = TRUE; 2154 break; 2155 } 2156 break; 2157 default: 2158 bf = TRUE; 2159 break; 2160 } 2161 } 2162 return bf; 2163 } 2164 2165 /* 2166 * Return a Boolean based on setting of a knob. 2167 * 2168 * If the knob is not set, the supplied default is the return value. 2169 * If set, anything that looks or smells like "No", "False", "Off", "0" etc, 2170 * is FALSE, otherwise TRUE. 2171 */ 2172 Boolean 2173 getBoolean(const char *name, Boolean fallback) 2174 { 2175 char *expr = str_concat3("${", name, ":U:tl}"); 2176 char *value; 2177 Boolean res; 2178 2179 (void)Var_Subst(expr, VAR_GLOBAL, VARE_WANTRES, &value); 2180 /* TODO: handle errors */ 2181 res = s2Boolean(value, fallback); 2182 free(value); 2183 free(expr); 2184 return res; 2185 } 2186
Indexes created Mon Sep 22 13:09:51 GMT 2025