main.c revision 319884
1/* $NetBSD: main.c,v 1.265 2017/05/10 22:26:14 sjg 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#ifndef MAKE_NATIVE 72static char rcsid[] = "$NetBSD: main.c,v 1.265 2017/05/10 22:26:14 sjg Exp $"; 73#else 74#include <sys/cdefs.h> 75#ifndef lint 76__COPYRIGHT("@(#) Copyright (c) 1988, 1989, 1990, 1993\ 77 The Regents of the University of California. All rights reserved."); 78#endif /* not lint */ 79 80#ifndef lint 81#if 0 82static char sccsid[] = "@(#)main.c 8.3 (Berkeley) 3/19/94"; 83#else 84__RCSID("$NetBSD: main.c,v 1.265 2017/05/10 22:26:14 sjg Exp $"); 85#endif 86#endif /* not lint */ 87#endif 88 89/*- 90 * main.c -- 91 * The main file for this entire program. Exit routines etc 92 * reside here. 93 * 94 * Utility functions defined in this file: 95 * Main_ParseArgLine Takes a line of arguments, breaks them and 96 * treats them as if they were given when first 97 * invoked. Used by the parse module to implement 98 * the .MFLAGS target. 99 * 100 * Error Print a tagged error message. The global 101 * MAKE variable must have been defined. This 102 * takes a format string and optional arguments 103 * for it. 104 * 105 * Fatal Print an error message and exit. Also takes 106 * a format string and arguments for it. 107 * 108 * Punt Aborts all jobs and exits with a message. Also 109 * takes a format string and arguments for it. 110 * 111 * Finish Finish things up by printing the number of 112 * errors which occurred, as passed to it, and 113 * exiting. 114 */ 115 116#include <sys/types.h> 117#include <sys/time.h> 118#include <sys/param.h> 119#include <sys/resource.h> 120#include <sys/stat.h> 121#if defined(MAKE_NATIVE) && defined(HAVE_SYSCTL) 122#include <sys/sysctl.h> 123#endif 124#include <sys/utsname.h> 125#include "wait.h" 126 127#include <errno.h> 128#include <signal.h> 129#include <stdarg.h> 130#include <stdio.h> 131#include <stdlib.h> 132#include <time.h> 133#include <ctype.h> 134 135#include "make.h" 136#include "hash.h" 137#include "dir.h" 138#include "job.h" 139#include "pathnames.h" 140#include "trace.h" 141 142#ifdef USE_IOVEC 143#include <sys/uio.h> 144#endif 145 146#ifndef DEFMAXLOCAL 147#define DEFMAXLOCAL DEFMAXJOBS 148#endif /* DEFMAXLOCAL */ 149 150#ifndef __arraycount 151# define __arraycount(__x) (sizeof(__x) / sizeof(__x[0])) 152#endif 153 154Lst create; /* Targets to be made */ 155time_t now; /* Time at start of make */ 156GNode *DEFAULT; /* .DEFAULT node */ 157Boolean allPrecious; /* .PRECIOUS given on line by itself */ 158Boolean deleteOnError; /* .DELETE_ON_ERROR: set */ 159 160static Boolean noBuiltins; /* -r flag */ 161static Lst makefiles; /* ordered list of makefiles to read */ 162static Boolean printVars; /* print value of one or more vars */ 163static Lst variables; /* list of variables to print */ 164int maxJobs; /* -j argument */ 165static int maxJobTokens; /* -j argument */ 166Boolean compatMake; /* -B argument */ 167int debug; /* -d argument */ 168Boolean debugVflag; /* -dV */ 169Boolean noExecute; /* -n flag */ 170Boolean noRecursiveExecute; /* -N flag */ 171Boolean keepgoing; /* -k flag */ 172Boolean queryFlag; /* -q flag */ 173Boolean touchFlag; /* -t flag */ 174Boolean enterFlag; /* -w flag */ 175Boolean enterFlagObj; /* -w and objdir != srcdir */ 176Boolean ignoreErrors; /* -i flag */ 177Boolean beSilent; /* -s flag */ 178Boolean oldVars; /* variable substitution style */ 179Boolean checkEnvFirst; /* -e flag */ 180Boolean parseWarnFatal; /* -W flag */ 181Boolean jobServer; /* -J flag */ 182static int jp_0 = -1, jp_1 = -1; /* ends of parent job pipe */ 183Boolean varNoExportEnv; /* -X flag */ 184Boolean doing_depend; /* Set while reading .depend */ 185static Boolean jobsRunning; /* TRUE if the jobs might be running */ 186static const char * tracefile; 187static void MainParseArgs(int, char **); 188static int ReadMakefile(const void *, const void *); 189static void usage(void) MAKE_ATTR_DEAD; 190static void purge_cached_realpaths(void); 191 192static Boolean ignorePWD; /* if we use -C, PWD is meaningless */ 193static char objdir[MAXPATHLEN + 1]; /* where we chdir'ed to */ 194char curdir[MAXPATHLEN + 1]; /* Startup directory */ 195char *progname; /* the program name */ 196char *makeDependfile; 197pid_t myPid; 198int makelevel; 199 200Boolean forceJobs = FALSE; 201 202/* 203 * On some systems MACHINE is defined as something other than 204 * what we want. 205 */ 206#ifdef FORCE_MACHINE 207# undef MACHINE 208# define MACHINE FORCE_MACHINE 209#endif 210 211extern Lst parseIncPath; 212 213/* 214 * For compatibility with the POSIX version of MAKEFLAGS that includes 215 * all the options with out -, convert flags to -f -l -a -g -s. 216 */ 217static char * 218explode(const char *flags) 219{ 220 size_t len; 221 char *nf, *st; 222 const char *f; 223 224 if (flags == NULL) 225 return NULL; 226 227 for (f = flags; *f; f++) 228 if (!isalpha((unsigned char)*f)) 229 break; 230 231 if (*f) 232 return bmake_strdup(flags); 233 234 len = strlen(flags); 235 st = nf = bmake_malloc(len * 3 + 1); 236 while (*flags) { 237 *nf++ = '-'; 238 *nf++ = *flags++; 239 *nf++ = ' '; 240 } 241 *nf = '\0'; 242 return st; 243} 244 245static void 246parse_debug_options(const char *argvalue) 247{ 248 const char *modules; 249 const char *mode; 250 char *fname; 251 int len; 252 253 for (modules = argvalue; *modules; ++modules) { 254 switch (*modules) { 255 case 'A': 256 debug = ~0; 257 break; 258 case 'a': 259 debug |= DEBUG_ARCH; 260 break; 261 case 'C': 262 debug |= DEBUG_CWD; 263 break; 264 case 'c': 265 debug |= DEBUG_COND; 266 break; 267 case 'd': 268 debug |= DEBUG_DIR; 269 break; 270 case 'e': 271 debug |= DEBUG_ERROR; 272 break; 273 case 'f': 274 debug |= DEBUG_FOR; 275 break; 276 case 'g': 277 if (modules[1] == '1') { 278 debug |= DEBUG_GRAPH1; 279 ++modules; 280 } 281 else if (modules[1] == '2') { 282 debug |= DEBUG_GRAPH2; 283 ++modules; 284 } 285 else if (modules[1] == '3') { 286 debug |= DEBUG_GRAPH3; 287 ++modules; 288 } 289 break; 290 case 'j': 291 debug |= DEBUG_JOB; 292 break; 293 case 'l': 294 debug |= DEBUG_LOUD; 295 break; 296 case 'M': 297 debug |= DEBUG_META; 298 break; 299 case 'm': 300 debug |= DEBUG_MAKE; 301 break; 302 case 'n': 303 debug |= DEBUG_SCRIPT; 304 break; 305 case 'p': 306 debug |= DEBUG_PARSE; 307 break; 308 case 's': 309 debug |= DEBUG_SUFF; 310 break; 311 case 't': 312 debug |= DEBUG_TARG; 313 break; 314 case 'V': 315 debugVflag = TRUE; 316 break; 317 case 'v': 318 debug |= DEBUG_VAR; 319 break; 320 case 'x': 321 debug |= DEBUG_SHELL; 322 break; 323 case 'F': 324 if (debug_file != stdout && debug_file != stderr) 325 fclose(debug_file); 326 if (*++modules == '+') { 327 modules++; 328 mode = "a"; 329 } else 330 mode = "w"; 331 if (strcmp(modules, "stdout") == 0) { 332 debug_file = stdout; 333 goto debug_setbuf; 334 } 335 if (strcmp(modules, "stderr") == 0) { 336 debug_file = stderr; 337 goto debug_setbuf; 338 } 339 len = strlen(modules); 340 fname = bmake_malloc(len + 20); 341 memcpy(fname, modules, len + 1); 342 /* Let the filename be modified by the pid */ 343 if (strcmp(fname + len - 3, ".%d") == 0) 344 snprintf(fname + len - 2, 20, "%d", getpid()); 345 debug_file = fopen(fname, mode); 346 if (!debug_file) { 347 fprintf(stderr, "Cannot open debug file %s\n", 348 fname); 349 usage(); 350 } 351 free(fname); 352 goto debug_setbuf; 353 default: 354 (void)fprintf(stderr, 355 "%s: illegal argument to d option -- %c\n", 356 progname, *modules); 357 usage(); 358 } 359 } 360debug_setbuf: 361 /* 362 * Make the debug_file unbuffered, and make 363 * stdout line buffered (unless debugfile == stdout). 364 */ 365 setvbuf(debug_file, NULL, _IONBF, 0); 366 if (debug_file != stdout) { 367 setvbuf(stdout, NULL, _IOLBF, 0); 368 } 369} 370 371/* 372 * does path contain any relative components 373 */ 374static int 375is_relpath(const char *path) 376{ 377 const char *cp; 378 379 if (path[0] != '/') 380 return TRUE; 381 cp = path; 382 do { 383 cp = strstr(cp, "/."); 384 if (!cp) 385 break; 386 cp += 2; 387 if (cp[0] == '/' || cp[0] == '\0') 388 return TRUE; 389 else if (cp[0] == '.') { 390 if (cp[1] == '/' || cp[1] == '\0') 391 return TRUE; 392 } 393 } while (cp); 394 return FALSE; 395} 396 397/*- 398 * MainParseArgs -- 399 * Parse a given argument vector. Called from main() and from 400 * Main_ParseArgLine() when the .MAKEFLAGS target is used. 401 * 402 * XXX: Deal with command line overriding .MAKEFLAGS in makefile 403 * 404 * Results: 405 * None 406 * 407 * Side Effects: 408 * Various global and local flags will be set depending on the flags 409 * given 410 */ 411static void 412MainParseArgs(int argc, char **argv) 413{ 414 char *p; 415 int c = '?'; 416 int arginc; 417 char *argvalue; 418 const char *getopt_def; 419 struct stat sa, sb; 420 char *optscan; 421 Boolean inOption, dashDash = FALSE; 422 char found_path[MAXPATHLEN + 1]; /* for searching for sys.mk */ 423 424#define OPTFLAGS "BC:D:I:J:NST:V:WXd:ef:ij:km:nqrstw" 425/* Can't actually use getopt(3) because rescanning is not portable */ 426 427 getopt_def = OPTFLAGS; 428rearg: 429 inOption = FALSE; 430 optscan = NULL; 431 while(argc > 1) { 432 char *getopt_spec; 433 if(!inOption) 434 optscan = argv[1]; 435 c = *optscan++; 436 arginc = 0; 437 if(inOption) { 438 if(c == '\0') { 439 ++argv; 440 --argc; 441 inOption = FALSE; 442 continue; 443 } 444 } else { 445 if (c != '-' || dashDash) 446 break; 447 inOption = TRUE; 448 c = *optscan++; 449 } 450 /* '-' found at some earlier point */ 451 getopt_spec = strchr(getopt_def, c); 452 if(c != '\0' && getopt_spec != NULL && getopt_spec[1] == ':') { 453 /* -<something> found, and <something> should have an arg */ 454 inOption = FALSE; 455 arginc = 1; 456 argvalue = optscan; 457 if(*argvalue == '\0') { 458 if (argc < 3) 459 goto noarg; 460 argvalue = argv[2]; 461 arginc = 2; 462 } 463 } else { 464 argvalue = NULL; 465 } 466 switch(c) { 467 case '\0': 468 arginc = 1; 469 inOption = FALSE; 470 break; 471 case 'B': 472 compatMake = TRUE; 473 Var_Append(MAKEFLAGS, "-B", VAR_GLOBAL); 474 Var_Set(MAKE_MODE, "compat", VAR_GLOBAL, 0); 475 break; 476 case 'C': 477 if (chdir(argvalue) == -1) { 478 (void)fprintf(stderr, 479 "%s: chdir %s: %s\n", 480 progname, argvalue, 481 strerror(errno)); 482 exit(1); 483 } 484 if (getcwd(curdir, MAXPATHLEN) == NULL) { 485 (void)fprintf(stderr, "%s: %s.\n", progname, strerror(errno)); 486 exit(2); 487 } 488 if (!is_relpath(argvalue) && 489 stat(argvalue, &sa) != -1 && 490 stat(curdir, &sb) != -1 && 491 sa.st_ino == sb.st_ino && 492 sa.st_dev == sb.st_dev) 493 strncpy(curdir, argvalue, MAXPATHLEN); 494 ignorePWD = TRUE; 495 break; 496 case 'D': 497 if (argvalue == NULL || argvalue[0] == 0) goto noarg; 498 Var_Set(argvalue, "1", VAR_GLOBAL, 0); 499 Var_Append(MAKEFLAGS, "-D", VAR_GLOBAL); 500 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 501 break; 502 case 'I': 503 if (argvalue == NULL) goto noarg; 504 Parse_AddIncludeDir(argvalue); 505 Var_Append(MAKEFLAGS, "-I", VAR_GLOBAL); 506 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 507 break; 508 case 'J': 509 if (argvalue == NULL) goto noarg; 510 if (sscanf(argvalue, "%d,%d", &jp_0, &jp_1) != 2) { 511 (void)fprintf(stderr, 512 "%s: internal error -- J option malformed (%s)\n", 513 progname, argvalue); 514 usage(); 515 } 516 if ((fcntl(jp_0, F_GETFD, 0) < 0) || 517 (fcntl(jp_1, F_GETFD, 0) < 0)) { 518#if 0 519 (void)fprintf(stderr, 520 "%s: ###### warning -- J descriptors were closed!\n", 521 progname); 522 exit(2); 523#endif 524 jp_0 = -1; 525 jp_1 = -1; 526 compatMake = TRUE; 527 } else { 528 Var_Append(MAKEFLAGS, "-J", VAR_GLOBAL); 529 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 530 jobServer = TRUE; 531 } 532 break; 533 case 'N': 534 noExecute = TRUE; 535 noRecursiveExecute = TRUE; 536 Var_Append(MAKEFLAGS, "-N", VAR_GLOBAL); 537 break; 538 case 'S': 539 keepgoing = FALSE; 540 Var_Append(MAKEFLAGS, "-S", VAR_GLOBAL); 541 break; 542 case 'T': 543 if (argvalue == NULL) goto noarg; 544 tracefile = bmake_strdup(argvalue); 545 Var_Append(MAKEFLAGS, "-T", VAR_GLOBAL); 546 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 547 break; 548 case 'V': 549 if (argvalue == NULL) goto noarg; 550 printVars = TRUE; 551 (void)Lst_AtEnd(variables, argvalue); 552 Var_Append(MAKEFLAGS, "-V", VAR_GLOBAL); 553 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 554 break; 555 case 'W': 556 parseWarnFatal = TRUE; 557 break; 558 case 'X': 559 varNoExportEnv = TRUE; 560 Var_Append(MAKEFLAGS, "-X", VAR_GLOBAL); 561 break; 562 case 'd': 563 if (argvalue == NULL) goto noarg; 564 /* If '-d-opts' don't pass to children */ 565 if (argvalue[0] == '-') 566 argvalue++; 567 else { 568 Var_Append(MAKEFLAGS, "-d", VAR_GLOBAL); 569 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 570 } 571 parse_debug_options(argvalue); 572 break; 573 case 'e': 574 checkEnvFirst = TRUE; 575 Var_Append(MAKEFLAGS, "-e", VAR_GLOBAL); 576 break; 577 case 'f': 578 if (argvalue == NULL) goto noarg; 579 (void)Lst_AtEnd(makefiles, argvalue); 580 break; 581 case 'i': 582 ignoreErrors = TRUE; 583 Var_Append(MAKEFLAGS, "-i", VAR_GLOBAL); 584 break; 585 case 'j': 586 if (argvalue == NULL) goto noarg; 587 forceJobs = TRUE; 588 maxJobs = strtol(argvalue, &p, 0); 589 if (*p != '\0' || maxJobs < 1) { 590 (void)fprintf(stderr, "%s: illegal argument to -j -- must be positive integer!\n", 591 progname); 592 exit(1); 593 } 594 Var_Append(MAKEFLAGS, "-j", VAR_GLOBAL); 595 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 596 Var_Set(".MAKE.JOBS", argvalue, VAR_GLOBAL, 0); 597 maxJobTokens = maxJobs; 598 break; 599 case 'k': 600 keepgoing = TRUE; 601 Var_Append(MAKEFLAGS, "-k", VAR_GLOBAL); 602 break; 603 case 'm': 604 if (argvalue == NULL) goto noarg; 605 /* look for magic parent directory search string */ 606 if (strncmp(".../", argvalue, 4) == 0) { 607 if (!Dir_FindHereOrAbove(curdir, argvalue+4, 608 found_path, sizeof(found_path))) 609 break; /* nothing doing */ 610 (void)Dir_AddDir(sysIncPath, found_path); 611 } else { 612 (void)Dir_AddDir(sysIncPath, argvalue); 613 } 614 Var_Append(MAKEFLAGS, "-m", VAR_GLOBAL); 615 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 616 break; 617 case 'n': 618 noExecute = TRUE; 619 Var_Append(MAKEFLAGS, "-n", VAR_GLOBAL); 620 break; 621 case 'q': 622 queryFlag = TRUE; 623 /* Kind of nonsensical, wot? */ 624 Var_Append(MAKEFLAGS, "-q", VAR_GLOBAL); 625 break; 626 case 'r': 627 noBuiltins = TRUE; 628 Var_Append(MAKEFLAGS, "-r", VAR_GLOBAL); 629 break; 630 case 's': 631 beSilent = TRUE; 632 Var_Append(MAKEFLAGS, "-s", VAR_GLOBAL); 633 break; 634 case 't': 635 touchFlag = TRUE; 636 Var_Append(MAKEFLAGS, "-t", VAR_GLOBAL); 637 break; 638 case 'w': 639 enterFlag = TRUE; 640 Var_Append(MAKEFLAGS, "-w", VAR_GLOBAL); 641 break; 642 case '-': 643 dashDash = TRUE; 644 break; 645 default: 646 case '?': 647#ifndef MAKE_NATIVE 648 fprintf(stderr, "getopt(%s) -> %d (%c)\n", 649 OPTFLAGS, c, c); 650#endif 651 usage(); 652 } 653 argv += arginc; 654 argc -= arginc; 655 } 656 657 oldVars = TRUE; 658 659 /* 660 * See if the rest of the arguments are variable assignments and 661 * perform them if so. Else take them to be targets and stuff them 662 * on the end of the "create" list. 663 */ 664 for (; argc > 1; ++argv, --argc) 665 if (Parse_IsVar(argv[1])) { 666 Parse_DoVar(argv[1], VAR_CMD); 667 } else { 668 if (!*argv[1]) 669 Punt("illegal (null) argument."); 670 if (*argv[1] == '-' && !dashDash) 671 goto rearg; 672 (void)Lst_AtEnd(create, bmake_strdup(argv[1])); 673 } 674 675 return; 676noarg: 677 (void)fprintf(stderr, "%s: option requires an argument -- %c\n", 678 progname, c); 679 usage(); 680} 681 682/*- 683 * Main_ParseArgLine -- 684 * Used by the parse module when a .MFLAGS or .MAKEFLAGS target 685 * is encountered and by main() when reading the .MAKEFLAGS envariable. 686 * Takes a line of arguments and breaks it into its 687 * component words and passes those words and the number of them to the 688 * MainParseArgs function. 689 * The line should have all its leading whitespace removed. 690 * 691 * Input: 692 * line Line to fracture 693 * 694 * Results: 695 * None 696 * 697 * Side Effects: 698 * Only those that come from the various arguments. 699 */ 700void 701Main_ParseArgLine(const char *line) 702{ 703 char **argv; /* Manufactured argument vector */ 704 int argc; /* Number of arguments in argv */ 705 char *args; /* Space used by the args */ 706 char *buf, *p1; 707 char *argv0 = Var_Value(".MAKE", VAR_GLOBAL, &p1); 708 size_t len; 709 710 if (line == NULL) 711 return; 712 for (; *line == ' '; ++line) 713 continue; 714 if (!*line) 715 return; 716 717#ifndef POSIX 718 { 719 /* 720 * $MAKE may simply be naming the make(1) binary 721 */ 722 char *cp; 723 724 if (!(cp = strrchr(line, '/'))) 725 cp = line; 726 if ((cp = strstr(cp, "make")) && 727 strcmp(cp, "make") == 0) 728 return; 729 } 730#endif 731 buf = bmake_malloc(len = strlen(line) + strlen(argv0) + 2); 732 (void)snprintf(buf, len, "%s %s", argv0, line); 733 free(p1); 734 735 argv = brk_string(buf, &argc, TRUE, &args); 736 if (argv == NULL) { 737 Error("Unterminated quoted string [%s]", buf); 738 free(buf); 739 return; 740 } 741 free(buf); 742 MainParseArgs(argc, argv); 743 744 free(args); 745 free(argv); 746} 747 748Boolean 749Main_SetObjdir(const char *fmt, ...) 750{ 751 struct stat sb; 752 char *path; 753 char buf[MAXPATHLEN + 1]; 754 char buf2[MAXPATHLEN + 1]; 755 Boolean rc = FALSE; 756 va_list ap; 757 758 va_start(ap, fmt); 759 vsnprintf(path = buf, MAXPATHLEN, fmt, ap); 760 va_end(ap); 761 762 if (path[0] != '/') { 763 snprintf(buf2, MAXPATHLEN, "%s/%s", curdir, path); 764 path = buf2; 765 } 766 767 /* look for the directory and try to chdir there */ 768 if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) { 769 if (chdir(path)) { 770 (void)fprintf(stderr, "make warning: %s: %s.\n", 771 path, strerror(errno)); 772 } else { 773 strncpy(objdir, path, MAXPATHLEN); 774 Var_Set(".OBJDIR", objdir, VAR_GLOBAL, 0); 775 setenv("PWD", objdir, 1); 776 Dir_InitDot(); 777 purge_cached_realpaths(); 778 rc = TRUE; 779 if (enterFlag && strcmp(objdir, curdir) != 0) 780 enterFlagObj = TRUE; 781 } 782 } 783 784 return rc; 785} 786 787static Boolean 788Main_SetVarObjdir(const char *var, const char *suffix) 789{ 790 char *p, *path, *xpath; 791 792 if ((path = Var_Value(var, VAR_CMD, &p)) == NULL) 793 return FALSE; 794 795 /* expand variable substitutions */ 796 if (strchr(path, '$') != 0) 797 xpath = Var_Subst(NULL, path, VAR_GLOBAL, VARF_WANTRES); 798 else 799 xpath = path; 800 801 (void)Main_SetObjdir("%s%s", xpath, suffix); 802 803 if (xpath != path) 804 free(xpath); 805 free(p); 806 return TRUE; 807} 808 809/*- 810 * ReadAllMakefiles -- 811 * wrapper around ReadMakefile() to read all. 812 * 813 * Results: 814 * TRUE if ok, FALSE on error 815 */ 816static int 817ReadAllMakefiles(const void *p, const void *q) 818{ 819 return (ReadMakefile(p, q) == 0); 820} 821 822int 823str2Lst_Append(Lst lp, char *str, const char *sep) 824{ 825 char *cp; 826 int n; 827 828 if (!sep) 829 sep = " \t"; 830 831 for (n = 0, cp = strtok(str, sep); cp; cp = strtok(NULL, sep)) { 832 (void)Lst_AtEnd(lp, cp); 833 n++; 834 } 835 return (n); 836} 837 838#ifdef SIGINFO 839/*ARGSUSED*/ 840static void 841siginfo(int signo MAKE_ATTR_UNUSED) 842{ 843 char dir[MAXPATHLEN]; 844 char str[2 * MAXPATHLEN]; 845 int len; 846 if (getcwd(dir, sizeof(dir)) == NULL) 847 return; 848 len = snprintf(str, sizeof(str), "%s: Working in: %s\n", progname, dir); 849 if (len > 0) 850 (void)write(STDERR_FILENO, str, (size_t)len); 851} 852#endif 853 854/* 855 * Allow makefiles some control over the mode we run in. 856 */ 857void 858MakeMode(const char *mode) 859{ 860 char *mp = NULL; 861 862 if (!mode) 863 mode = mp = Var_Subst(NULL, "${" MAKE_MODE ":tl}", 864 VAR_GLOBAL, VARF_WANTRES); 865 866 if (mode && *mode) { 867 if (strstr(mode, "compat")) { 868 compatMake = TRUE; 869 forceJobs = FALSE; 870 } 871#if USE_META 872 if (strstr(mode, "meta")) 873 meta_mode_init(mode); 874#endif 875 } 876 877 free(mp); 878} 879 880/*- 881 * main -- 882 * The main function, for obvious reasons. Initializes variables 883 * and a few modules, then parses the arguments give it in the 884 * environment and on the command line. Reads the system makefile 885 * followed by either Makefile, makefile or the file given by the 886 * -f argument. Sets the .MAKEFLAGS PMake variable based on all the 887 * flags it has received by then uses either the Make or the Compat 888 * module to create the initial list of targets. 889 * 890 * Results: 891 * If -q was given, exits -1 if anything was out-of-date. Else it exits 892 * 0. 893 * 894 * Side Effects: 895 * The program exits when done. Targets are created. etc. etc. etc. 896 */ 897int 898main(int argc, char **argv) 899{ 900 Lst targs; /* target nodes to create -- passed to Make_Init */ 901 Boolean outOfDate = FALSE; /* FALSE if all targets up to date */ 902 struct stat sb, sa; 903 char *p1, *path; 904 char mdpath[MAXPATHLEN]; 905#ifdef FORCE_MACHINE 906 const char *machine = FORCE_MACHINE; 907#else 908 const char *machine = getenv("MACHINE"); 909#endif 910 const char *machine_arch = getenv("MACHINE_ARCH"); 911 char *syspath = getenv("MAKESYSPATH"); 912 Lst sysMkPath; /* Path of sys.mk */ 913 char *cp = NULL, *start; 914 /* avoid faults on read-only strings */ 915 static char defsyspath[] = _PATH_DEFSYSPATH; 916 char found_path[MAXPATHLEN + 1]; /* for searching for sys.mk */ 917 struct timeval rightnow; /* to initialize random seed */ 918 struct utsname utsname; 919 920 /* default to writing debug to stderr */ 921 debug_file = stderr; 922 923#ifdef SIGINFO 924 (void)bmake_signal(SIGINFO, siginfo); 925#endif 926 /* 927 * Set the seed to produce a different random sequence 928 * on each program execution. 929 */ 930 gettimeofday(&rightnow, NULL); 931 srandom(rightnow.tv_sec + rightnow.tv_usec); 932 933 if ((progname = strrchr(argv[0], '/')) != NULL) 934 progname++; 935 else 936 progname = argv[0]; 937#if defined(MAKE_NATIVE) || (defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE)) 938 /* 939 * get rid of resource limit on file descriptors 940 */ 941 { 942 struct rlimit rl; 943 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 && 944 rl.rlim_cur != rl.rlim_max) { 945 rl.rlim_cur = rl.rlim_max; 946 (void)setrlimit(RLIMIT_NOFILE, &rl); 947 } 948 } 949#endif 950 951 if (uname(&utsname) == -1) { 952 (void)fprintf(stderr, "%s: uname failed (%s).\n", progname, 953 strerror(errno)); 954 exit(2); 955 } 956 957 /* 958 * Get the name of this type of MACHINE from utsname 959 * so we can share an executable for similar machines. 960 * (i.e. m68k: amiga hp300, mac68k, sun3, ...) 961 * 962 * Note that both MACHINE and MACHINE_ARCH are decided at 963 * run-time. 964 */ 965 if (!machine) { 966#ifdef MAKE_NATIVE 967 machine = utsname.machine; 968#else 969#ifdef MAKE_MACHINE 970 machine = MAKE_MACHINE; 971#else 972 machine = "unknown"; 973#endif 974#endif 975 } 976 977 if (!machine_arch) { 978#if defined(MAKE_NATIVE) && defined(HAVE_SYSCTL) && defined(CTL_HW) && defined(HW_MACHINE_ARCH) 979 static char machine_arch_buf[sizeof(utsname.machine)]; 980 int mib[2] = { CTL_HW, HW_MACHINE_ARCH }; 981 size_t len = sizeof(machine_arch_buf); 982 983 if (sysctl(mib, __arraycount(mib), machine_arch_buf, 984 &len, NULL, 0) < 0) { 985 (void)fprintf(stderr, "%s: sysctl failed (%s).\n", progname, 986 strerror(errno)); 987 exit(2); 988 } 989 990 machine_arch = machine_arch_buf; 991#else 992#ifndef MACHINE_ARCH 993#ifdef MAKE_MACHINE_ARCH 994 machine_arch = MAKE_MACHINE_ARCH; 995#else 996 machine_arch = "unknown"; 997#endif 998#else 999 machine_arch = MACHINE_ARCH; 1000#endif 1001#endif 1002 } 1003 1004 myPid = getpid(); /* remember this for vFork() */ 1005 1006 /* 1007 * Just in case MAKEOBJDIR wants us to do something tricky. 1008 */ 1009 Var_Init(); /* Initialize the lists of variables for 1010 * parsing arguments */ 1011 Var_Set(".MAKE.OS", utsname.sysname, VAR_GLOBAL, 0); 1012 Var_Set("MACHINE", machine, VAR_GLOBAL, 0); 1013 Var_Set("MACHINE_ARCH", machine_arch, VAR_GLOBAL, 0); 1014#ifdef MAKE_VERSION 1015 Var_Set("MAKE_VERSION", MAKE_VERSION, VAR_GLOBAL, 0); 1016#endif 1017 Var_Set(".newline", "\n", VAR_GLOBAL, 0); /* handy for :@ loops */ 1018 /* 1019 * This is the traditional preference for makefiles. 1020 */ 1021#ifndef MAKEFILE_PREFERENCE_LIST 1022# define MAKEFILE_PREFERENCE_LIST "makefile Makefile" 1023#endif 1024 Var_Set(MAKEFILE_PREFERENCE, MAKEFILE_PREFERENCE_LIST, 1025 VAR_GLOBAL, 0); 1026 Var_Set(MAKE_DEPENDFILE, ".depend", VAR_GLOBAL, 0); 1027 1028 create = Lst_Init(FALSE); 1029 makefiles = Lst_Init(FALSE); 1030 printVars = FALSE; 1031 debugVflag = FALSE; 1032 variables = Lst_Init(FALSE); 1033 beSilent = FALSE; /* Print commands as executed */ 1034 ignoreErrors = FALSE; /* Pay attention to non-zero returns */ 1035 noExecute = FALSE; /* Execute all commands */ 1036 noRecursiveExecute = FALSE; /* Execute all .MAKE targets */ 1037 keepgoing = FALSE; /* Stop on error */ 1038 allPrecious = FALSE; /* Remove targets when interrupted */ 1039 deleteOnError = FALSE; /* Historical default behavior */ 1040 queryFlag = FALSE; /* This is not just a check-run */ 1041 noBuiltins = FALSE; /* Read the built-in rules */ 1042 touchFlag = FALSE; /* Actually update targets */ 1043 debug = 0; /* No debug verbosity, please. */ 1044 jobsRunning = FALSE; 1045 1046 maxJobs = DEFMAXLOCAL; /* Set default local max concurrency */ 1047 maxJobTokens = maxJobs; 1048 compatMake = FALSE; /* No compat mode */ 1049 ignorePWD = FALSE; 1050 1051 /* 1052 * Initialize the parsing, directory and variable modules to prepare 1053 * for the reading of inclusion paths and variable settings on the 1054 * command line 1055 */ 1056 1057 /* 1058 * Initialize various variables. 1059 * MAKE also gets this name, for compatibility 1060 * .MAKEFLAGS gets set to the empty string just in case. 1061 * MFLAGS also gets initialized empty, for compatibility. 1062 */ 1063 Parse_Init(); 1064 if (argv[0][0] == '/' || strchr(argv[0], '/') == NULL) { 1065 /* 1066 * Leave alone if it is an absolute path, or if it does 1067 * not contain a '/' in which case we need to find it in 1068 * the path, like execvp(3) and the shells do. 1069 */ 1070 p1 = argv[0]; 1071 } else { 1072 /* 1073 * A relative path, canonicalize it. 1074 */ 1075 p1 = cached_realpath(argv[0], mdpath); 1076 if (!p1 || *p1 != '/' || stat(p1, &sb) < 0) { 1077 p1 = argv[0]; /* realpath failed */ 1078 } 1079 } 1080 Var_Set("MAKE", p1, VAR_GLOBAL, 0); 1081 Var_Set(".MAKE", p1, VAR_GLOBAL, 0); 1082 Var_Set(MAKEFLAGS, "", VAR_GLOBAL, 0); 1083 Var_Set(MAKEOVERRIDES, "", VAR_GLOBAL, 0); 1084 Var_Set("MFLAGS", "", VAR_GLOBAL, 0); 1085 Var_Set(".ALLTARGETS", "", VAR_GLOBAL, 0); 1086 /* some makefiles need to know this */ 1087 Var_Set(MAKE_LEVEL ".ENV", MAKE_LEVEL_ENV, VAR_CMD, 0); 1088 1089 /* 1090 * Set some other useful macros 1091 */ 1092 { 1093 char tmp[64], *ep; 1094 1095 makelevel = ((ep = getenv(MAKE_LEVEL_ENV)) && *ep) ? atoi(ep) : 0; 1096 if (makelevel < 0) 1097 makelevel = 0; 1098 snprintf(tmp, sizeof(tmp), "%d", makelevel); 1099 Var_Set(MAKE_LEVEL, tmp, VAR_GLOBAL, 0); 1100 snprintf(tmp, sizeof(tmp), "%u", myPid); 1101 Var_Set(".MAKE.PID", tmp, VAR_GLOBAL, 0); 1102 snprintf(tmp, sizeof(tmp), "%u", getppid()); 1103 Var_Set(".MAKE.PPID", tmp, VAR_GLOBAL, 0); 1104 } 1105 if (makelevel > 0) { 1106 char pn[1024]; 1107 snprintf(pn, sizeof(pn), "%s[%d]", progname, makelevel); 1108 progname = bmake_strdup(pn); 1109 } 1110 1111#ifdef USE_META 1112 meta_init(); 1113#endif 1114 Dir_Init(NULL); /* Dir_* safe to call from MainParseArgs */ 1115 1116 /* 1117 * First snag any flags out of the MAKE environment variable. 1118 * (Note this is *not* MAKEFLAGS since /bin/make uses that and it's 1119 * in a different format). 1120 */ 1121#ifdef POSIX 1122 p1 = explode(getenv("MAKEFLAGS")); 1123 Main_ParseArgLine(p1); 1124 free(p1); 1125#else 1126 Main_ParseArgLine(getenv("MAKE")); 1127#endif 1128 1129 /* 1130 * Find where we are (now). 1131 * We take care of PWD for the automounter below... 1132 */ 1133 if (getcwd(curdir, MAXPATHLEN) == NULL) { 1134 (void)fprintf(stderr, "%s: getcwd: %s.\n", 1135 progname, strerror(errno)); 1136 exit(2); 1137 } 1138 1139 MainParseArgs(argc, argv); 1140 1141 if (enterFlag) 1142 printf("%s: Entering directory `%s'\n", progname, curdir); 1143 1144 /* 1145 * Verify that cwd is sane. 1146 */ 1147 if (stat(curdir, &sa) == -1) { 1148 (void)fprintf(stderr, "%s: %s: %s.\n", 1149 progname, curdir, strerror(errno)); 1150 exit(2); 1151 } 1152 1153 /* 1154 * All this code is so that we know where we are when we start up 1155 * on a different machine with pmake. 1156 * Overriding getcwd() with $PWD totally breaks MAKEOBJDIRPREFIX 1157 * since the value of curdir can vary depending on how we got 1158 * here. Ie sitting at a shell prompt (shell that provides $PWD) 1159 * or via subdir.mk in which case its likely a shell which does 1160 * not provide it. 1161 * So, to stop it breaking this case only, we ignore PWD if 1162 * MAKEOBJDIRPREFIX is set or MAKEOBJDIR contains a transform. 1163 */ 1164#ifndef NO_PWD_OVERRIDE 1165 if (!ignorePWD) { 1166 char *pwd, *ptmp1 = NULL, *ptmp2 = NULL; 1167 1168 if ((pwd = getenv("PWD")) != NULL && 1169 Var_Value("MAKEOBJDIRPREFIX", VAR_CMD, &ptmp1) == NULL) { 1170 const char *makeobjdir = Var_Value("MAKEOBJDIR", 1171 VAR_CMD, &ptmp2); 1172 1173 if (makeobjdir == NULL || !strchr(makeobjdir, '$')) { 1174 if (stat(pwd, &sb) == 0 && 1175 sa.st_ino == sb.st_ino && 1176 sa.st_dev == sb.st_dev) 1177 (void)strncpy(curdir, pwd, MAXPATHLEN); 1178 } 1179 } 1180 free(ptmp1); 1181 free(ptmp2); 1182 } 1183#endif 1184 Var_Set(".CURDIR", curdir, VAR_GLOBAL, 0); 1185 1186 /* 1187 * Find the .OBJDIR. If MAKEOBJDIRPREFIX, or failing that, 1188 * MAKEOBJDIR is set in the environment, try only that value 1189 * and fall back to .CURDIR if it does not exist. 1190 * 1191 * Otherwise, try _PATH_OBJDIR.MACHINE-MACHINE_ARCH, _PATH_OBJDIR.MACHINE, 1192 * and * finally _PATH_OBJDIRPREFIX`pwd`, in that order. If none 1193 * of these paths exist, just use .CURDIR. 1194 */ 1195 Dir_Init(curdir); 1196 (void)Main_SetObjdir("%s", curdir); 1197 1198 if (!Main_SetVarObjdir("MAKEOBJDIRPREFIX", curdir) && 1199 !Main_SetVarObjdir("MAKEOBJDIR", "") && 1200 !Main_SetObjdir("%s.%s-%s", _PATH_OBJDIR, machine, machine_arch) && 1201 !Main_SetObjdir("%s.%s", _PATH_OBJDIR, machine) && 1202 !Main_SetObjdir("%s", _PATH_OBJDIR)) 1203 (void)Main_SetObjdir("%s%s", _PATH_OBJDIRPREFIX, curdir); 1204 1205 /* 1206 * Initialize archive, target and suffix modules in preparation for 1207 * parsing the makefile(s) 1208 */ 1209 Arch_Init(); 1210 Targ_Init(); 1211 Suff_Init(); 1212 Trace_Init(tracefile); 1213 1214 DEFAULT = NULL; 1215 (void)time(&now); 1216 1217 Trace_Log(MAKESTART, NULL); 1218 1219 /* 1220 * Set up the .TARGETS variable to contain the list of targets to be 1221 * created. If none specified, make the variable empty -- the parser 1222 * will fill the thing in with the default or .MAIN target. 1223 */ 1224 if (!Lst_IsEmpty(create)) { 1225 LstNode ln; 1226 1227 for (ln = Lst_First(create); ln != NULL; 1228 ln = Lst_Succ(ln)) { 1229 char *name = (char *)Lst_Datum(ln); 1230 1231 Var_Append(".TARGETS", name, VAR_GLOBAL); 1232 } 1233 } else 1234 Var_Set(".TARGETS", "", VAR_GLOBAL, 0); 1235 1236 1237 /* 1238 * If no user-supplied system path was given (through the -m option) 1239 * add the directories from the DEFSYSPATH (more than one may be given 1240 * as dir1:...:dirn) to the system include path. 1241 */ 1242 if (syspath == NULL || *syspath == '\0') 1243 syspath = defsyspath; 1244 else 1245 syspath = bmake_strdup(syspath); 1246 1247 for (start = syspath; *start != '\0'; start = cp) { 1248 for (cp = start; *cp != '\0' && *cp != ':'; cp++) 1249 continue; 1250 if (*cp == ':') { 1251 *cp++ = '\0'; 1252 } 1253 /* look for magic parent directory search string */ 1254 if (strncmp(".../", start, 4) != 0) { 1255 (void)Dir_AddDir(defIncPath, start); 1256 } else { 1257 if (Dir_FindHereOrAbove(curdir, start+4, 1258 found_path, sizeof(found_path))) { 1259 (void)Dir_AddDir(defIncPath, found_path); 1260 } 1261 } 1262 } 1263 if (syspath != defsyspath) 1264 free(syspath); 1265 1266 /* 1267 * Read in the built-in rules first, followed by the specified 1268 * makefile, if it was (makefile != NULL), or the default 1269 * makefile and Makefile, in that order, if it wasn't. 1270 */ 1271 if (!noBuiltins) { 1272 LstNode ln; 1273 1274 sysMkPath = Lst_Init(FALSE); 1275 Dir_Expand(_PATH_DEFSYSMK, 1276 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath, 1277 sysMkPath); 1278 if (Lst_IsEmpty(sysMkPath)) 1279 Fatal("%s: no system rules (%s).", progname, 1280 _PATH_DEFSYSMK); 1281 ln = Lst_Find(sysMkPath, NULL, ReadMakefile); 1282 if (ln == NULL) 1283 Fatal("%s: cannot open %s.", progname, 1284 (char *)Lst_Datum(ln)); 1285 } 1286 1287 if (!Lst_IsEmpty(makefiles)) { 1288 LstNode ln; 1289 1290 ln = Lst_Find(makefiles, NULL, ReadAllMakefiles); 1291 if (ln != NULL) 1292 Fatal("%s: cannot open %s.", progname, 1293 (char *)Lst_Datum(ln)); 1294 } else { 1295 p1 = Var_Subst(NULL, "${" MAKEFILE_PREFERENCE "}", 1296 VAR_CMD, VARF_WANTRES); 1297 if (p1) { 1298 (void)str2Lst_Append(makefiles, p1, NULL); 1299 (void)Lst_Find(makefiles, NULL, ReadMakefile); 1300 free(p1); 1301 } 1302 } 1303 1304 /* In particular suppress .depend for '-r -V .OBJDIR -f /dev/null' */ 1305 if (!noBuiltins || !printVars) { 1306 makeDependfile = Var_Subst(NULL, "${.MAKE.DEPENDFILE:T}", 1307 VAR_CMD, VARF_WANTRES); 1308 doing_depend = TRUE; 1309 (void)ReadMakefile(makeDependfile, NULL); 1310 doing_depend = FALSE; 1311 } 1312 1313 if (enterFlagObj) 1314 printf("%s: Entering directory `%s'\n", progname, objdir); 1315 1316 MakeMode(NULL); 1317 1318 Var_Append("MFLAGS", Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1), VAR_GLOBAL); 1319 free(p1); 1320 1321 if (!forceJobs && !compatMake && 1322 Var_Exists(".MAKE.JOBS", VAR_GLOBAL)) { 1323 char *value; 1324 int n; 1325 1326 value = Var_Subst(NULL, "${.MAKE.JOBS}", VAR_GLOBAL, VARF_WANTRES); 1327 n = strtol(value, NULL, 0); 1328 if (n < 1) { 1329 (void)fprintf(stderr, "%s: illegal value for .MAKE.JOBS -- must be positive integer!\n", 1330 progname); 1331 exit(1); 1332 } 1333 if (n != maxJobs) { 1334 Var_Append(MAKEFLAGS, "-j", VAR_GLOBAL); 1335 Var_Append(MAKEFLAGS, value, VAR_GLOBAL); 1336 } 1337 maxJobs = n; 1338 maxJobTokens = maxJobs; 1339 forceJobs = TRUE; 1340 free(value); 1341 } 1342 1343 /* 1344 * Be compatible if user did not specify -j and did not explicitly 1345 * turned compatibility on 1346 */ 1347 if (!compatMake && !forceJobs) { 1348 compatMake = TRUE; 1349 } 1350 1351 if (!compatMake) 1352 Job_ServerStart(maxJobTokens, jp_0, jp_1); 1353 if (DEBUG(JOB)) 1354 fprintf(debug_file, "job_pipe %d %d, maxjobs %d, tokens %d, compat %d\n", 1355 jp_0, jp_1, maxJobs, maxJobTokens, compatMake); 1356 1357 if (!printVars) 1358 Main_ExportMAKEFLAGS(TRUE); /* initial export */ 1359 1360 /* 1361 * For compatibility, look at the directories in the VPATH variable 1362 * and add them to the search path, if the variable is defined. The 1363 * variable's value is in the same format as the PATH envariable, i.e. 1364 * <directory>:<directory>:<directory>... 1365 */ 1366 if (Var_Exists("VPATH", VAR_CMD)) { 1367 char *vpath, savec; 1368 /* 1369 * GCC stores string constants in read-only memory, but 1370 * Var_Subst will want to write this thing, so store it 1371 * in an array 1372 */ 1373 static char VPATH[] = "${VPATH}"; 1374 1375 vpath = Var_Subst(NULL, VPATH, VAR_CMD, VARF_WANTRES); 1376 path = vpath; 1377 do { 1378 /* skip to end of directory */ 1379 for (cp = path; *cp != ':' && *cp != '\0'; cp++) 1380 continue; 1381 /* Save terminator character so know when to stop */ 1382 savec = *cp; 1383 *cp = '\0'; 1384 /* Add directory to search path */ 1385 (void)Dir_AddDir(dirSearchPath, path); 1386 *cp = savec; 1387 path = cp + 1; 1388 } while (savec == ':'); 1389 free(vpath); 1390 } 1391 1392 /* 1393 * Now that all search paths have been read for suffixes et al, it's 1394 * time to add the default search path to their lists... 1395 */ 1396 Suff_DoPaths(); 1397 1398 /* 1399 * Propagate attributes through :: dependency lists. 1400 */ 1401 Targ_Propagate(); 1402 1403 /* print the initial graph, if the user requested it */ 1404 if (DEBUG(GRAPH1)) 1405 Targ_PrintGraph(1); 1406 1407 /* print the values of any variables requested by the user */ 1408 if (printVars) { 1409 LstNode ln; 1410 Boolean expandVars; 1411 1412 if (debugVflag) 1413 expandVars = FALSE; 1414 else 1415 expandVars = getBoolean(".MAKE.EXPAND_VARIABLES", FALSE); 1416 for (ln = Lst_First(variables); ln != NULL; 1417 ln = Lst_Succ(ln)) { 1418 char *var = (char *)Lst_Datum(ln); 1419 char *value; 1420 1421 if (strchr(var, '$')) { 1422 value = p1 = Var_Subst(NULL, var, VAR_GLOBAL, 1423 VARF_WANTRES); 1424 } else if (expandVars) { 1425 char tmp[128]; 1426 1427 if (snprintf(tmp, sizeof(tmp), "${%s}", var) >= (int)(sizeof(tmp))) 1428 Fatal("%s: variable name too big: %s", 1429 progname, var); 1430 value = p1 = Var_Subst(NULL, tmp, VAR_GLOBAL, 1431 VARF_WANTRES); 1432 } else { 1433 value = Var_Value(var, VAR_GLOBAL, &p1); 1434 } 1435 printf("%s\n", value ? value : ""); 1436 free(p1); 1437 } 1438 } else { 1439 /* 1440 * Have now read the entire graph and need to make a list of 1441 * targets to create. If none was given on the command line, 1442 * we consult the parsing module to find the main target(s) 1443 * to create. 1444 */ 1445 if (Lst_IsEmpty(create)) 1446 targs = Parse_MainName(); 1447 else 1448 targs = Targ_FindList(create, TARG_CREATE); 1449 1450 if (!compatMake) { 1451 /* 1452 * Initialize job module before traversing the graph 1453 * now that any .BEGIN and .END targets have been read. 1454 * This is done only if the -q flag wasn't given 1455 * (to prevent the .BEGIN from being executed should 1456 * it exist). 1457 */ 1458 if (!queryFlag) { 1459 Job_Init(); 1460 jobsRunning = TRUE; 1461 } 1462 1463 /* Traverse the graph, checking on all the targets */ 1464 outOfDate = Make_Run(targs); 1465 } else { 1466 /* 1467 * Compat_Init will take care of creating all the 1468 * targets as well as initializing the module. 1469 */ 1470 Compat_Run(targs); 1471 } 1472 } 1473 1474#ifdef CLEANUP 1475 Lst_Destroy(targs, NULL); 1476 Lst_Destroy(variables, NULL); 1477 Lst_Destroy(makefiles, NULL); 1478 Lst_Destroy(create, (FreeProc *)free); 1479#endif 1480 1481 /* print the graph now it's been processed if the user requested it */ 1482 if (DEBUG(GRAPH2)) 1483 Targ_PrintGraph(2); 1484 1485 Trace_Log(MAKEEND, 0); 1486 1487 if (enterFlagObj) 1488 printf("%s: Leaving directory `%s'\n", progname, objdir); 1489 if (enterFlag) 1490 printf("%s: Leaving directory `%s'\n", progname, curdir); 1491 1492#ifdef USE_META 1493 meta_finish(); 1494#endif 1495 Suff_End(); 1496 Targ_End(); 1497 Arch_End(); 1498 Var_End(); 1499 Parse_End(); 1500 Dir_End(); 1501 Job_End(); 1502 Trace_End(); 1503 1504 return outOfDate ? 1 : 0; 1505} 1506 1507/*- 1508 * ReadMakefile -- 1509 * Open and parse the given makefile. 1510 * 1511 * Results: 1512 * 0 if ok. -1 if couldn't open file. 1513 * 1514 * Side Effects: 1515 * lots 1516 */ 1517static int 1518ReadMakefile(const void *p, const void *q MAKE_ATTR_UNUSED) 1519{ 1520 const char *fname = p; /* makefile to read */ 1521 int fd; 1522 size_t len = MAXPATHLEN; 1523 char *name, *path = bmake_malloc(len); 1524 1525 if (!strcmp(fname, "-")) { 1526 Parse_File(NULL /*stdin*/, -1); 1527 Var_Set("MAKEFILE", "", VAR_INTERNAL, 0); 1528 } else { 1529 /* if we've chdir'd, rebuild the path name */ 1530 if (strcmp(curdir, objdir) && *fname != '/') { 1531 size_t plen = strlen(curdir) + strlen(fname) + 2; 1532 if (len < plen) 1533 path = bmake_realloc(path, len = 2 * plen); 1534 1535 (void)snprintf(path, len, "%s/%s", curdir, fname); 1536 fd = open(path, O_RDONLY); 1537 if (fd != -1) { 1538 fname = path; 1539 goto found; 1540 } 1541 1542 /* If curdir failed, try objdir (ala .depend) */ 1543 plen = strlen(objdir) + strlen(fname) + 2; 1544 if (len < plen) 1545 path = bmake_realloc(path, len = 2 * plen); 1546 (void)snprintf(path, len, "%s/%s", objdir, fname); 1547 fd = open(path, O_RDONLY); 1548 if (fd != -1) { 1549 fname = path; 1550 goto found; 1551 } 1552 } else { 1553 fd = open(fname, O_RDONLY); 1554 if (fd != -1) 1555 goto found; 1556 } 1557 /* look in -I and system include directories. */ 1558 name = Dir_FindFile(fname, parseIncPath); 1559 if (!name) 1560 name = Dir_FindFile(fname, 1561 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath); 1562 if (!name || (fd = open(name, O_RDONLY)) == -1) { 1563 free(name); 1564 free(path); 1565 return(-1); 1566 } 1567 fname = name; 1568 /* 1569 * set the MAKEFILE variable desired by System V fans -- the 1570 * placement of the setting here means it gets set to the last 1571 * makefile specified, as it is set by SysV make. 1572 */ 1573found: 1574 if (!doing_depend) 1575 Var_Set("MAKEFILE", fname, VAR_INTERNAL, 0); 1576 Parse_File(fname, fd); 1577 } 1578 free(path); 1579 return(0); 1580} 1581 1582 1583 1584/*- 1585 * Cmd_Exec -- 1586 * Execute the command in cmd, and return the output of that command 1587 * in a string. 1588 * 1589 * Results: 1590 * A string containing the output of the command, or the empty string 1591 * If errnum is not NULL, it contains the reason for the command failure 1592 * 1593 * Side Effects: 1594 * The string must be freed by the caller. 1595 */ 1596char * 1597Cmd_Exec(const char *cmd, const char **errnum) 1598{ 1599 const char *args[4]; /* Args for invoking the shell */ 1600 int fds[2]; /* Pipe streams */ 1601 int cpid; /* Child PID */ 1602 int pid; /* PID from wait() */ 1603 char *res; /* result */ 1604 WAIT_T status; /* command exit status */ 1605 Buffer buf; /* buffer to store the result */ 1606 char *cp; 1607 int cc; /* bytes read, or -1 */ 1608 int savederr; /* saved errno */ 1609 1610 1611 *errnum = NULL; 1612 1613 if (!shellName) 1614 Shell_Init(); 1615 /* 1616 * Set up arguments for shell 1617 */ 1618 args[0] = shellName; 1619 args[1] = "-c"; 1620 args[2] = cmd; 1621 args[3] = NULL; 1622 1623 /* 1624 * Open a pipe for fetching its output 1625 */ 1626 if (pipe(fds) == -1) { 1627 *errnum = "Couldn't create pipe for \"%s\""; 1628 goto bad; 1629 } 1630 1631 /* 1632 * Fork 1633 */ 1634 switch (cpid = vFork()) { 1635 case 0: 1636 /* 1637 * Close input side of pipe 1638 */ 1639 (void)close(fds[0]); 1640 1641 /* 1642 * Duplicate the output stream to the shell's output, then 1643 * shut the extra thing down. Note we don't fetch the error 1644 * stream...why not? Why? 1645 */ 1646 (void)dup2(fds[1], 1); 1647 (void)close(fds[1]); 1648 1649 Var_ExportVars(); 1650 1651 (void)execv(shellPath, UNCONST(args)); 1652 _exit(1); 1653 /*NOTREACHED*/ 1654 1655 case -1: 1656 *errnum = "Couldn't exec \"%s\""; 1657 goto bad; 1658 1659 default: 1660 /* 1661 * No need for the writing half 1662 */ 1663 (void)close(fds[1]); 1664 1665 savederr = 0; 1666 Buf_Init(&buf, 0); 1667 1668 do { 1669 char result[BUFSIZ]; 1670 cc = read(fds[0], result, sizeof(result)); 1671 if (cc > 0) 1672 Buf_AddBytes(&buf, cc, result); 1673 } 1674 while (cc > 0 || (cc == -1 && errno == EINTR)); 1675 if (cc == -1) 1676 savederr = errno; 1677 1678 /* 1679 * Close the input side of the pipe. 1680 */ 1681 (void)close(fds[0]); 1682 1683 /* 1684 * Wait for the process to exit. 1685 */ 1686 while(((pid = waitpid(cpid, &status, 0)) != cpid) && (pid >= 0)) { 1687 JobReapChild(pid, status, FALSE); 1688 continue; 1689 } 1690 cc = Buf_Size(&buf); 1691 res = Buf_Destroy(&buf, FALSE); 1692 1693 if (savederr != 0) 1694 *errnum = "Couldn't read shell's output for \"%s\""; 1695 1696 if (WIFSIGNALED(status)) 1697 *errnum = "\"%s\" exited on a signal"; 1698 else if (WEXITSTATUS(status) != 0) 1699 *errnum = "\"%s\" returned non-zero status"; 1700 1701 /* 1702 * Null-terminate the result, convert newlines to spaces and 1703 * install it in the variable. 1704 */ 1705 res[cc] = '\0'; 1706 cp = &res[cc]; 1707 1708 if (cc > 0 && *--cp == '\n') { 1709 /* 1710 * A final newline is just stripped 1711 */ 1712 *cp-- = '\0'; 1713 } 1714 while (cp >= res) { 1715 if (*cp == '\n') { 1716 *cp = ' '; 1717 } 1718 cp--; 1719 } 1720 break; 1721 } 1722 return res; 1723bad: 1724 res = bmake_malloc(1); 1725 *res = '\0'; 1726 return res; 1727} 1728 1729/*- 1730 * Error -- 1731 * Print an error message given its format. 1732 * 1733 * Results: 1734 * None. 1735 * 1736 * Side Effects: 1737 * The message is printed. 1738 */ 1739/* VARARGS */ 1740void 1741Error(const char *fmt, ...) 1742{ 1743 va_list ap; 1744 FILE *err_file; 1745 1746 err_file = debug_file; 1747 if (err_file == stdout) 1748 err_file = stderr; 1749 (void)fflush(stdout); 1750 for (;;) { 1751 va_start(ap, fmt); 1752 fprintf(err_file, "%s: ", progname); 1753 (void)vfprintf(err_file, fmt, ap); 1754 va_end(ap); 1755 (void)fprintf(err_file, "\n"); 1756 (void)fflush(err_file); 1757 if (err_file == stderr) 1758 break; 1759 err_file = stderr; 1760 } 1761} 1762 1763/*- 1764 * Fatal -- 1765 * Produce a Fatal error message. If jobs are running, waits for them 1766 * to finish. 1767 * 1768 * Results: 1769 * None 1770 * 1771 * Side Effects: 1772 * The program exits 1773 */ 1774/* VARARGS */ 1775void 1776Fatal(const char *fmt, ...) 1777{ 1778 va_list ap; 1779 1780 va_start(ap, fmt); 1781 if (jobsRunning) 1782 Job_Wait(); 1783 1784 (void)fflush(stdout); 1785 (void)vfprintf(stderr, fmt, ap); 1786 va_end(ap); 1787 (void)fprintf(stderr, "\n"); 1788 (void)fflush(stderr); 1789 1790 PrintOnError(NULL, NULL); 1791 1792 if (DEBUG(GRAPH2) || DEBUG(GRAPH3)) 1793 Targ_PrintGraph(2); 1794 Trace_Log(MAKEERROR, 0); 1795 exit(2); /* Not 1 so -q can distinguish error */ 1796} 1797 1798/* 1799 * Punt -- 1800 * Major exception once jobs are being created. Kills all jobs, prints 1801 * a message and exits. 1802 * 1803 * Results: 1804 * None 1805 * 1806 * Side Effects: 1807 * All children are killed indiscriminately and the program Lib_Exits 1808 */ 1809/* VARARGS */ 1810void 1811Punt(const char *fmt, ...) 1812{ 1813 va_list ap; 1814 1815 va_start(ap, fmt); 1816 (void)fflush(stdout); 1817 (void)fprintf(stderr, "%s: ", progname); 1818 (void)vfprintf(stderr, fmt, ap); 1819 va_end(ap); 1820 (void)fprintf(stderr, "\n"); 1821 (void)fflush(stderr); 1822 1823 PrintOnError(NULL, NULL); 1824 1825 DieHorribly(); 1826} 1827 1828/*- 1829 * DieHorribly -- 1830 * Exit without giving a message. 1831 * 1832 * Results: 1833 * None 1834 * 1835 * Side Effects: 1836 * A big one... 1837 */ 1838void 1839DieHorribly(void) 1840{ 1841 if (jobsRunning) 1842 Job_AbortAll(); 1843 if (DEBUG(GRAPH2)) 1844 Targ_PrintGraph(2); 1845 Trace_Log(MAKEERROR, 0); 1846 exit(2); /* Not 1, so -q can distinguish error */ 1847} 1848 1849/* 1850 * Finish -- 1851 * Called when aborting due to errors in child shell to signal 1852 * abnormal exit. 1853 * 1854 * Results: 1855 * None 1856 * 1857 * Side Effects: 1858 * The program exits 1859 */ 1860void 1861Finish(int errors) 1862 /* number of errors encountered in Make_Make */ 1863{ 1864 Fatal("%d error%s", errors, errors == 1 ? "" : "s"); 1865} 1866 1867/* 1868 * eunlink -- 1869 * Remove a file carefully, avoiding directories. 1870 */ 1871int 1872eunlink(const char *file) 1873{ 1874 struct stat st; 1875 1876 if (lstat(file, &st) == -1) 1877 return -1; 1878 1879 if (S_ISDIR(st.st_mode)) { 1880 errno = EISDIR; 1881 return -1; 1882 } 1883 return unlink(file); 1884} 1885 1886/* 1887 * execError -- 1888 * Print why exec failed, avoiding stdio. 1889 */ 1890void 1891execError(const char *af, const char *av) 1892{ 1893#ifdef USE_IOVEC 1894 int i = 0; 1895 struct iovec iov[8]; 1896#define IOADD(s) \ 1897 (void)(iov[i].iov_base = UNCONST(s), \ 1898 iov[i].iov_len = strlen(iov[i].iov_base), \ 1899 i++) 1900#else 1901#define IOADD(s) (void)write(2, s, strlen(s)) 1902#endif 1903 1904 IOADD(progname); 1905 IOADD(": "); 1906 IOADD(af); 1907 IOADD("("); 1908 IOADD(av); 1909 IOADD(") failed ("); 1910 IOADD(strerror(errno)); 1911 IOADD(")\n"); 1912 1913#ifdef USE_IOVEC 1914 while (writev(2, iov, 8) == -1 && errno == EAGAIN) 1915 continue; 1916#endif 1917} 1918 1919/* 1920 * usage -- 1921 * exit with usage message 1922 */ 1923static void 1924usage(void) 1925{ 1926 char *p; 1927 if ((p = strchr(progname, '[')) != NULL) 1928 *p = '\0'; 1929 1930 (void)fprintf(stderr, 1931"usage: %s [-BeikNnqrstWwX] \n\ 1932 [-C directory] [-D variable] [-d flags] [-f makefile]\n\ 1933 [-I directory] [-J private] [-j max_jobs] [-m directory] [-T file]\n\ 1934 [-V variable] [variable=value] [target ...]\n", progname); 1935 exit(2); 1936} 1937 1938/* 1939 * realpath(3) can get expensive, cache results... 1940 */ 1941static GNode *cached_realpaths = NULL; 1942 1943static GNode * 1944get_cached_realpaths(void) 1945{ 1946 1947 if (!cached_realpaths) { 1948 cached_realpaths = Targ_NewGN("Realpath"); 1949#ifndef DEBUG_REALPATH_CACHE 1950 cached_realpaths->flags = INTERNAL; 1951#endif 1952 } 1953 1954 return cached_realpaths; 1955} 1956 1957/* purge any relative paths */ 1958static void 1959purge_cached_realpaths(void) 1960{ 1961 GNode *cache = get_cached_realpaths(); 1962 Hash_Entry *he, *nhe; 1963 Hash_Search hs; 1964 1965 he = Hash_EnumFirst(&cache->context, &hs); 1966 while (he) { 1967 nhe = Hash_EnumNext(&hs); 1968 if (he->name[0] != '/') { 1969 if (DEBUG(DIR)) 1970 fprintf(stderr, "cached_realpath: purging %s\n", he->name); 1971 Hash_DeleteEntry(&cache->context, he); 1972 } 1973 he = nhe; 1974 } 1975} 1976 1977char * 1978cached_realpath(const char *pathname, char *resolved) 1979{ 1980 GNode *cache; 1981 char *rp, *cp; 1982 1983 if (!pathname || !pathname[0]) 1984 return NULL; 1985 1986 cache = get_cached_realpaths(); 1987 1988 if ((rp = Var_Value(pathname, cache, &cp)) != NULL) { 1989 /* a hit */ 1990 strlcpy(resolved, rp, MAXPATHLEN); 1991 } else if ((rp = realpath(pathname, resolved)) != NULL) { 1992 Var_Set(pathname, rp, cache, 0); 1993 } 1994 free(cp); 1995 return rp ? resolved : NULL; 1996} 1997 1998int 1999PrintAddr(void *a, void *b) 2000{ 2001 printf("%lx ", (unsigned long) a); 2002 return b ? 0 : 0; 2003} 2004 2005 2006static int 2007addErrorCMD(void *cmdp, void *gnp MAKE_ATTR_UNUSED) 2008{ 2009 if (cmdp == NULL) 2010 return 1; /* stop */ 2011 Var_Append(".ERROR_CMD", cmdp, VAR_GLOBAL); 2012 return 0; 2013} 2014 2015void 2016PrintOnError(GNode *gn, const char *s) 2017{ 2018 static GNode *en = NULL; 2019 char tmp[64]; 2020 char *cp; 2021 2022 if (s) 2023 printf("%s", s); 2024 2025 printf("\n%s: stopped in %s\n", progname, curdir); 2026 2027 if (en) 2028 return; /* we've been here! */ 2029 if (gn) { 2030 /* 2031 * We can print this even if there is no .ERROR target. 2032 */ 2033 Var_Set(".ERROR_TARGET", gn->name, VAR_GLOBAL, 0); 2034 Var_Delete(".ERROR_CMD", VAR_GLOBAL); 2035 Lst_ForEach(gn->commands, addErrorCMD, gn); 2036 } 2037 strncpy(tmp, "${MAKE_PRINT_VAR_ON_ERROR:@v@$v='${$v}'\n@}", 2038 sizeof(tmp) - 1); 2039 cp = Var_Subst(NULL, tmp, VAR_GLOBAL, VARF_WANTRES); 2040 if (cp) { 2041 if (*cp) 2042 printf("%s", cp); 2043 free(cp); 2044 } 2045 fflush(stdout); 2046 2047 /* 2048 * Finally, see if there is a .ERROR target, and run it if so. 2049 */ 2050 en = Targ_FindNode(".ERROR", TARG_NOCREATE); 2051 if (en) { 2052 en->type |= OP_SPECIAL; 2053 Compat_Make(en, en); 2054 } 2055} 2056 2057void 2058Main_ExportMAKEFLAGS(Boolean first) 2059{ 2060 static int once = 1; 2061 char tmp[64]; 2062 char *s; 2063 2064 if (once != first) 2065 return; 2066 once = 0; 2067 2068 strncpy(tmp, "${.MAKEFLAGS} ${.MAKEOVERRIDES:O:u:@v@$v=${$v:Q}@}", 2069 sizeof(tmp)); 2070 s = Var_Subst(NULL, tmp, VAR_CMD, VARF_WANTRES); 2071 if (s && *s) { 2072#ifdef POSIX 2073 setenv("MAKEFLAGS", s, 1); 2074#else 2075 setenv("MAKE", s, 1); 2076#endif 2077 } 2078} 2079 2080char * 2081getTmpdir(void) 2082{ 2083 static char *tmpdir = NULL; 2084 2085 if (!tmpdir) { 2086 struct stat st; 2087 2088 /* 2089 * Honor $TMPDIR but only if it is valid. 2090 * Ensure it ends with /. 2091 */ 2092 tmpdir = Var_Subst(NULL, "${TMPDIR:tA:U" _PATH_TMP "}/", VAR_GLOBAL, 2093 VARF_WANTRES); 2094 if (stat(tmpdir, &st) < 0 || !S_ISDIR(st.st_mode)) { 2095 free(tmpdir); 2096 tmpdir = bmake_strdup(_PATH_TMP); 2097 } 2098 } 2099 return tmpdir; 2100} 2101 2102/* 2103 * Create and open a temp file using "pattern". 2104 * If "fnamep" is provided set it to a copy of the filename created. 2105 * Otherwise unlink the file once open. 2106 */ 2107int 2108mkTempFile(const char *pattern, char **fnamep) 2109{ 2110 static char *tmpdir = NULL; 2111 char tfile[MAXPATHLEN]; 2112 int fd; 2113 2114 if (!pattern) 2115 pattern = TMPPAT; 2116 if (!tmpdir) 2117 tmpdir = getTmpdir(); 2118 if (pattern[0] == '/') { 2119 snprintf(tfile, sizeof(tfile), "%s", pattern); 2120 } else { 2121 snprintf(tfile, sizeof(tfile), "%s%s", tmpdir, pattern); 2122 } 2123 if ((fd = mkstemp(tfile)) < 0) 2124 Punt("Could not create temporary file %s: %s", tfile, strerror(errno)); 2125 if (fnamep) { 2126 *fnamep = bmake_strdup(tfile); 2127 } else { 2128 unlink(tfile); /* we just want the descriptor */ 2129 } 2130 return fd; 2131} 2132 2133/* 2134 * Convert a string representation of a boolean. 2135 * Anything that looks like "No", "False", "Off", "0" etc, 2136 * is FALSE, otherwise TRUE. 2137 */ 2138Boolean 2139s2Boolean(const char *s, Boolean bf) 2140{ 2141 if (s) { 2142 switch(*s) { 2143 case '\0': /* not set - the default wins */ 2144 break; 2145 case '0': 2146 case 'F': 2147 case 'f': 2148 case 'N': 2149 case 'n': 2150 bf = FALSE; 2151 break; 2152 case 'O': 2153 case 'o': 2154 switch (s[1]) { 2155 case 'F': 2156 case 'f': 2157 bf = FALSE; 2158 break; 2159 default: 2160 bf = TRUE; 2161 break; 2162 } 2163 break; 2164 default: 2165 bf = TRUE; 2166 break; 2167 } 2168 } 2169 return (bf); 2170} 2171 2172/* 2173 * Return a Boolean based on setting of a knob. 2174 * 2175 * If the knob is not set, the supplied default is the return value. 2176 * If set, anything that looks or smells like "No", "False", "Off", "0" etc, 2177 * is FALSE, otherwise TRUE. 2178 */ 2179Boolean 2180getBoolean(const char *name, Boolean bf) 2181{ 2182 char tmp[64]; 2183 char *cp; 2184 2185 if (snprintf(tmp, sizeof(tmp), "${%s:U:tl}", name) < (int)(sizeof(tmp))) { 2186 cp = Var_Subst(NULL, tmp, VAR_GLOBAL, VARF_WANTRES); 2187 2188 if (cp) { 2189 bf = s2Boolean(cp, bf); 2190 free(cp); 2191 } 2192 } 2193 return (bf); 2194} 2195