main.c revision 213493
1/*- 2 * Copyright (c) 1988, 1989, 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * Copyright (c) 1989 by Berkeley Softworks 5 * 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. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)main.c 8.3 (Berkeley) 3/19/94 39 */ 40 41#ifndef lint 42#if 0 43static char copyright[] = 44"@(#) Copyright (c) 1988, 1989, 1990, 1993\n\ 45 The Regents of the University of California. All rights reserved.\n"; 46#endif 47#endif /* not lint */ 48#include <sys/cdefs.h> 49__FBSDID("$FreeBSD: head/usr.bin/make/main.c 213493 2010-10-06 20:49:45Z imp $"); 50 51/* 52 * main.c 53 * The main file for this entire program. Exit routines etc 54 * reside here. 55 * 56 * Utility functions defined in this file: 57 * Main_ParseArgLine 58 * Takes a line of arguments, breaks them and 59 * treats them as if they were given when first 60 * invoked. Used by the parse module to implement 61 * the .MFLAGS target. 62 */ 63 64#include <sys/param.h> 65#include <sys/stat.h> 66#include <sys/sysctl.h> 67#include <sys/time.h> 68#include <sys/queue.h> 69#include <sys/resource.h> 70#include <sys/utsname.h> 71#include <sys/wait.h> 72#include <err.h> 73#include <errno.h> 74#include <stdlib.h> 75#include <string.h> 76#include <unistd.h> 77 78#include "arch.h" 79#include "buf.h" 80#include "config.h" 81#include "dir.h" 82#include "globals.h" 83#include "GNode.h" 84#include "job.h" 85#include "make.h" 86#include "parse.h" 87#include "pathnames.h" 88#include "shell.h" 89#include "str.h" 90#include "suff.h" 91#include "targ.h" 92#include "util.h" 93#include "var.h" 94 95extern char **environ; /* XXX what header declares this variable? */ 96 97#define WANT_ENV_MKLVL 1 98#define MKLVL_MAXVAL 500 99#define MKLVL_ENVVAR "__MKLVL__" 100 101/* ordered list of makefiles to read */ 102static Lst makefiles = Lst_Initializer(makefiles); 103 104/* ordered list of source makefiles */ 105static Lst source_makefiles = Lst_Initializer(source_makefiles); 106 107/* list of variables to print */ 108static Lst variables = Lst_Initializer(variables); 109 110static Boolean expandVars; /* fully expand printed variables */ 111static Boolean noBuiltins; /* -r flag */ 112static Boolean forceJobs; /* -j argument given */ 113static char *curdir; /* startup directory */ 114static char *objdir; /* where we chdir'ed to */ 115static char **save_argv; /* saved argv */ 116static char *save_makeflags;/* saved MAKEFLAGS */ 117 118/* (-E) vars to override from env */ 119Lst envFirstVars = Lst_Initializer(envFirstVars); 120 121/* Targets to be made */ 122Lst create = Lst_Initializer(create); 123 124Boolean allPrecious; /* .PRECIOUS given on line by itself */ 125Boolean is_posix; /* .POSIX target seen */ 126Boolean mfAutoDeps; /* .MAKEFILEDEPS target seen */ 127Boolean remakingMakefiles; /* True if remaking makefiles is in progress */ 128Boolean beSilent; /* -s flag */ 129Boolean beVerbose; /* -v flag */ 130Boolean beQuiet; /* -Q flag */ 131Boolean compatMake; /* -B argument */ 132int debug; /* -d flag */ 133Boolean ignoreErrors; /* -i flag */ 134int jobLimit; /* -j argument */ 135int makeErrors; /* Number of targets not remade due to errors */ 136Boolean jobsRunning; /* TRUE if the jobs might be running */ 137Boolean keepgoing; /* -k flag */ 138Boolean noExecute; /* -n flag */ 139Boolean printGraphOnly; /* -p flag */ 140Boolean queryFlag; /* -q flag */ 141Boolean touchFlag; /* -t flag */ 142Boolean usePipes; /* !-P flag */ 143uint32_t warn_cmd; /* command line warning flags */ 144uint32_t warn_flags; /* actual warning flags */ 145uint32_t warn_nocmd; /* command line no-warning flags */ 146 147time_t now; /* Time at start of make */ 148struct GNode *DEFAULT; /* .DEFAULT node */ 149 150/** 151 * Exit with usage message. 152 */ 153static void 154usage(void) 155{ 156 fprintf(stderr, 157 "usage: make [-BPSXeiknpqrstv] [-C directory] [-D variable]\n" 158 "\t[-d flags] [-E variable] [-f makefile] [-I directory]\n" 159 "\t[-j max_jobs] [-m directory] [-V variable]\n" 160 "\t[variable=value] [target ...]\n"); 161 exit(2); 162} 163 164/** 165 * MFLAGS_append 166 * Append a flag with an optional argument to MAKEFLAGS and MFLAGS 167 */ 168static void 169MFLAGS_append(const char *flag, char *arg) 170{ 171 char *str; 172 173 Var_Append(".MAKEFLAGS", flag, VAR_GLOBAL); 174 if (arg != NULL) { 175 str = MAKEFLAGS_quote(arg); 176 Var_Append(".MAKEFLAGS", str, VAR_GLOBAL); 177 free(str); 178 } 179 180 Var_Append("MFLAGS", flag, VAR_GLOBAL); 181 if (arg != NULL) { 182 str = MAKEFLAGS_quote(arg); 183 Var_Append("MFLAGS", str, VAR_GLOBAL); 184 free(str); 185 } 186} 187 188/** 189 * Main_ParseWarn 190 * 191 * Handle argument to warning option. 192 */ 193int 194Main_ParseWarn(const char *arg, int iscmd) 195{ 196 int i, neg; 197 198 static const struct { 199 const char *option; 200 uint32_t flag; 201 } options[] = { 202 { "dirsyntax", WARN_DIRSYNTAX }, 203 { NULL, 0 } 204 }; 205 206 neg = 0; 207 if (arg[0] == 'n' && arg[1] == 'o') { 208 neg = 1; 209 arg += 2; 210 } 211 212 for (i = 0; options[i].option != NULL; i++) 213 if (strcmp(arg, options[i].option) == 0) 214 break; 215 216 if (options[i].option == NULL) 217 /* unknown option */ 218 return (-1); 219 220 if (iscmd) { 221 if (!neg) { 222 warn_cmd |= options[i].flag; 223 warn_nocmd &= ~options[i].flag; 224 warn_flags |= options[i].flag; 225 } else { 226 warn_nocmd |= options[i].flag; 227 warn_cmd &= ~options[i].flag; 228 warn_flags &= ~options[i].flag; 229 } 230 } else { 231 if (!neg) { 232 warn_flags |= (options[i].flag & ~warn_nocmd); 233 } else { 234 warn_flags &= ~(options[i].flag | warn_cmd); 235 } 236 } 237 return (0); 238} 239 240/** 241 * Open and parse the given makefile. 242 * 243 * Results: 244 * TRUE if ok. FALSE if couldn't open file. 245 */ 246static Boolean 247ReadMakefile(const char p[]) 248{ 249 char *fname, *fnamesave; /* makefile to read */ 250 FILE *stream; 251 char *name, path[MAXPATHLEN]; 252 char *MAKEFILE; 253 int setMAKEFILE; 254 255 /* XXX - remove this once constification is done */ 256 fnamesave = fname = estrdup(p); 257 258 if (!strcmp(fname, "-")) { 259 Parse_File("(stdin)", stdin); 260 Var_SetGlobal("MAKEFILE", ""); 261 } else { 262 setMAKEFILE = strcmp(fname, ".depend"); 263 264 /* if we've chdir'd, rebuild the path name */ 265 if (curdir != objdir && *fname != '/') { 266 snprintf(path, MAXPATHLEN, "%s/%s", curdir, fname); 267 /* 268 * XXX The realpath stuff breaks relative includes 269 * XXX in some cases. The problem likely is in 270 * XXX parse.c where it does special things in 271 * XXX ParseDoInclude if the file is relateive 272 * XXX or absolute and not a system file. There 273 * XXX it assumes that if the current file that's 274 * XXX being included is absolute, that any files 275 * XXX that it includes shouldn't do the -I path 276 * XXX stuff, which is inconsistant with historical 277 * XXX behavior. However, I can't pentrate the mists 278 * XXX further, so I'm putting this workaround in 279 * XXX here until such time as the underlying bug 280 * XXX can be fixed. 281 */ 282#if THIS_BREAKS_THINGS 283 if (realpath(path, path) != NULL && 284 (stream = fopen(path, "r")) != NULL) { 285 MAKEFILE = fname; 286 fname = path; 287 goto found; 288 } 289 } else if (realpath(fname, path) != NULL) { 290 MAKEFILE = fname; 291 fname = path; 292 if ((stream = fopen(fname, "r")) != NULL) 293 goto found; 294 } 295#else 296 if ((stream = fopen(path, "r")) != NULL) { 297 MAKEFILE = fname; 298 fname = path; 299 goto found; 300 } 301 } else { 302 MAKEFILE = fname; 303 if ((stream = fopen(fname, "r")) != NULL) 304 goto found; 305 } 306#endif 307 /* look in -I and system include directories. */ 308 name = Path_FindFile(fname, &parseIncPath); 309 if (!name) 310 name = Path_FindFile(fname, &sysIncPath); 311 if (!name || !(stream = fopen(name, "r"))) { 312 free(fnamesave); 313 return (FALSE); 314 } 315 MAKEFILE = fname = name; 316 /* 317 * set the MAKEFILE variable desired by System V fans -- the 318 * placement of the setting here means it gets set to the last 319 * makefile specified, as it is set by SysV make. 320 */ 321found: 322 if (setMAKEFILE) 323 Var_SetGlobal("MAKEFILE", MAKEFILE); 324 Parse_File(fname, stream); 325 } 326 free(fnamesave); 327 return (TRUE); 328} 329 330/** 331 * Open and parse the given makefile. 332 * If open is successful add it to the list of makefiles. 333 * 334 * Results: 335 * TRUE if ok. FALSE if couldn't open file. 336 */ 337static Boolean 338TryReadMakefile(const char p[]) 339{ 340 char *data; 341 LstNode *last = Lst_Last(&source_makefiles); 342 343 if (!ReadMakefile(p)) 344 return (FALSE); 345 346 data = estrdup(p); 347 if (last == NULL) { 348 LstNode *first = Lst_First(&source_makefiles); 349 Lst_Insert(&source_makefiles, first, data); 350 } else 351 Lst_Append(&source_makefiles, last, estrdup(p)); 352 return (TRUE); 353} 354 355/** 356 * MainParseArgs 357 * Parse a given argument vector. Called from main() and from 358 * Main_ParseArgLine() when the .MAKEFLAGS target is used. 359 * 360 * XXX: Deal with command line overriding .MAKEFLAGS in makefile 361 * 362 * Side Effects: 363 * Various global and local flags will be set depending on the flags 364 * given 365 */ 366static void 367MainParseArgs(int argc, char **argv) 368{ 369 int c; 370 Boolean found_dd = FALSE; 371 char found_dir[MAXPATHLEN + 1]; /* for searching for sys.mk */ 372 373rearg: 374 optind = 1; /* since we're called more than once */ 375 optreset = 1; 376#define OPTFLAGS "ABC:D:d:E:ef:I:ij:km:nPpQqrSstV:vXx:" 377 for (;;) { 378 if ((optind < argc) && strcmp(argv[optind], "--") == 0) { 379 found_dd = TRUE; 380 } 381 if ((c = getopt(argc, argv, OPTFLAGS)) == -1) { 382 break; 383 } 384 switch(c) { 385 386 case 'A': 387 arch_fatal = FALSE; 388 MFLAGS_append("-A", NULL); 389 break; 390 case 'B': 391 compatMake = TRUE; 392 MFLAGS_append("-B", NULL); 393 unsetenv("MAKE_JOBS_FIFO"); 394 break; 395 case 'C': 396 if (chdir(optarg) == -1) 397 err(1, "chdir %s", optarg); 398 if (getcwd(curdir, MAXPATHLEN) == NULL) 399 err(2, NULL); 400 break; 401 case 'D': 402 Var_SetGlobal(optarg, "1"); 403 MFLAGS_append("-D", optarg); 404 break; 405 case 'd': { 406 char *modules = optarg; 407 408 for (; *modules; ++modules) 409 switch (*modules) { 410 case 'A': 411 debug = ~0; 412 break; 413 case 'a': 414 debug |= DEBUG_ARCH; 415 break; 416 case 'c': 417 debug |= DEBUG_COND; 418 break; 419 case 'd': 420 debug |= DEBUG_DIR; 421 break; 422 case 'f': 423 debug |= DEBUG_FOR; 424 break; 425 case 'g': 426 if (modules[1] == '1') { 427 debug |= DEBUG_GRAPH1; 428 ++modules; 429 } 430 else if (modules[1] == '2') { 431 debug |= DEBUG_GRAPH2; 432 ++modules; 433 } 434 break; 435 case 'j': 436 debug |= DEBUG_JOB; 437 break; 438 case 'l': 439 debug |= DEBUG_LOUD; 440 break; 441 case 'm': 442 debug |= DEBUG_MAKE; 443 break; 444 case 's': 445 debug |= DEBUG_SUFF; 446 break; 447 case 't': 448 debug |= DEBUG_TARG; 449 break; 450 case 'v': 451 debug |= DEBUG_VAR; 452 break; 453 default: 454 warnx("illegal argument to d option " 455 "-- %c", *modules); 456 usage(); 457 } 458 MFLAGS_append("-d", optarg); 459 break; 460 } 461 case 'E': 462 Lst_AtEnd(&envFirstVars, estrdup(optarg)); 463 MFLAGS_append("-E", optarg); 464 break; 465 case 'e': 466 checkEnvFirst = TRUE; 467 MFLAGS_append("-e", NULL); 468 break; 469 case 'f': 470 Lst_AtEnd(&makefiles, estrdup(optarg)); 471 break; 472 case 'I': 473 Parse_AddIncludeDir(optarg); 474 MFLAGS_append("-I", optarg); 475 break; 476 case 'i': 477 ignoreErrors = TRUE; 478 MFLAGS_append("-i", NULL); 479 break; 480 case 'j': { 481 char *endptr; 482 483 forceJobs = TRUE; 484 jobLimit = strtol(optarg, &endptr, 10); 485 if (jobLimit <= 0 || *endptr != '\0') { 486 warnx("illegal number, -j argument -- %s", 487 optarg); 488 usage(); 489 } 490 MFLAGS_append("-j", optarg); 491 break; 492 } 493 case 'k': 494 keepgoing = TRUE; 495 MFLAGS_append("-k", NULL); 496 break; 497 case 'm': 498 /* look for magic parent directory search string */ 499 if (strncmp(".../", optarg, 4) == 0) { 500 if (!Dir_FindHereOrAbove(curdir, optarg + 4, 501 found_dir, sizeof(found_dir))) 502 break; /* nothing doing */ 503 Path_AddDir(&sysIncPath, found_dir); 504 } else { 505 Path_AddDir(&sysIncPath, optarg); 506 } 507 MFLAGS_append("-m", optarg); 508 break; 509 case 'n': 510 noExecute = TRUE; 511 MFLAGS_append("-n", NULL); 512 break; 513 case 'P': 514 usePipes = FALSE; 515 MFLAGS_append("-P", NULL); 516 break; 517 case 'p': 518 printGraphOnly = TRUE; 519 debug |= DEBUG_GRAPH1; 520 break; 521 case 'Q': 522 beQuiet = TRUE; 523 beVerbose = FALSE; 524 MFLAGS_append("-Q", NULL); 525 break; 526 case 'q': 527 queryFlag = TRUE; 528 /* Kind of nonsensical, wot? */ 529 MFLAGS_append("-q", NULL); 530 break; 531 case 'r': 532 noBuiltins = TRUE; 533 MFLAGS_append("-r", NULL); 534 break; 535 case 'S': 536 keepgoing = FALSE; 537 MFLAGS_append("-S", NULL); 538 break; 539 case 's': 540 beSilent = TRUE; 541 MFLAGS_append("-s", NULL); 542 break; 543 case 't': 544 touchFlag = TRUE; 545 MFLAGS_append("-t", NULL); 546 break; 547 case 'V': 548 Lst_AtEnd(&variables, estrdup(optarg)); 549 MFLAGS_append("-V", optarg); 550 break; 551 case 'v': 552 beVerbose = TRUE; 553 beQuiet = FALSE; 554 MFLAGS_append("-v", NULL); 555 break; 556 case 'X': 557 expandVars = FALSE; 558 break; 559 case 'x': 560 if (Main_ParseWarn(optarg, 1) != -1) 561 MFLAGS_append("-x", optarg); 562 break; 563 564 default: 565 case '?': 566 usage(); 567 } 568 } 569 argv += optind; 570 argc -= optind; 571 572 oldVars = TRUE; 573 574 /* 575 * Parse the rest of the arguments. 576 * o Check for variable assignments and perform them if so. 577 * o Check for more flags and restart getopt if so. 578 * o Anything else is taken to be a target and added 579 * to the end of the "create" list. 580 */ 581 for (; *argv != NULL; ++argv, --argc) { 582 if (Parse_IsVar(*argv)) { 583 char *ptr = MAKEFLAGS_quote(*argv); 584 char *v = estrdup(*argv); 585 586 Var_Append(".MAKEFLAGS", ptr, VAR_GLOBAL); 587 Parse_DoVar(v, VAR_CMD); 588 free(ptr); 589 free(v); 590 591 } else if ((*argv)[0] == '-') { 592 if ((*argv)[1] == '\0') { 593 /* 594 * (*argv) is a single dash, so we 595 * just ignore it. 596 */ 597 } else if (found_dd) { 598 /* 599 * Double dash has been found, ignore 600 * any more options. But what do we do 601 * with it? For now treat it like a target. 602 */ 603 Lst_AtEnd(&create, estrdup(*argv)); 604 } else { 605 /* 606 * (*argv) is a -flag, so backup argv and 607 * argc. getopt() expects options to start 608 * in the 2nd position. 609 */ 610 argc++; 611 argv--; 612 goto rearg; 613 } 614 615 } else if ((*argv)[0] == '\0') { 616 Punt("illegal (null) argument."); 617 618 } else { 619 Lst_AtEnd(&create, estrdup(*argv)); 620 } 621 } 622} 623 624/** 625 * Main_ParseArgLine 626 * Used by the parse module when a .MFLAGS or .MAKEFLAGS target 627 * is encountered and by main() when reading the .MAKEFLAGS envariable. 628 * Takes a line of arguments and breaks it into its 629 * component words and passes those words and the number of them to the 630 * MainParseArgs function. 631 * The line should have all its leading whitespace removed. 632 * 633 * Side Effects: 634 * Only those that come from the various arguments. 635 */ 636void 637Main_ParseArgLine(char *line, int mflags) 638{ 639 ArgArray aa; 640 641 if (line == NULL) 642 return; 643 for (; *line == ' '; ++line) 644 continue; 645 if (!*line) 646 return; 647 648 if (mflags) 649 MAKEFLAGS_break(&aa, line); 650 else 651 brk_string(&aa, line, TRUE); 652 653 MainParseArgs(aa.argc, aa.argv); 654 ArgArray_Done(&aa); 655} 656 657static char * 658chdir_verify_path(const char *path, char *obpath) 659{ 660 struct stat sb; 661 662 if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) { 663 if (chdir(path) == -1 || getcwd(obpath, MAXPATHLEN) == NULL) { 664 warn("warning: %s", path); 665 return (NULL); 666 } 667 return (obpath); 668 } 669 670 return (NULL); 671} 672 673/** 674 * In lieu of a good way to prevent every possible looping in make(1), stop 675 * there from being more than MKLVL_MAXVAL processes forked by make(1), to 676 * prevent a forkbomb from happening, in a dumb and mechanical way. 677 * 678 * Side Effects: 679 * Creates or modifies enviornment variable MKLVL_ENVVAR via setenv(). 680 */ 681static void 682check_make_level(void) 683{ 684#ifdef WANT_ENV_MKLVL 685 char *value = getenv(MKLVL_ENVVAR); 686 int level = (value == NULL) ? 0 : atoi(value); 687 688 if (level < 0) { 689 errx(2, "Invalid value for recursion level (%d).", level); 690 } else if (level > MKLVL_MAXVAL) { 691 errx(2, "Max recursion level (%d) exceeded.", MKLVL_MAXVAL); 692 } else { 693 char new_value[32]; 694 sprintf(new_value, "%d", level + 1); 695 setenv(MKLVL_ENVVAR, new_value, 1); 696 } 697#endif /* WANT_ENV_MKLVL */ 698} 699 700/** 701 * Main_AddSourceMakefile 702 * Add a file to the list of source makefiles 703 */ 704void 705Main_AddSourceMakefile(const char *name) 706{ 707 708 Lst_AtEnd(&source_makefiles, estrdup(name)); 709} 710 711/** 712 * Remake_Makefiles 713 * Remake all the makefiles 714 */ 715static void 716Remake_Makefiles(void) 717{ 718 Lst cleanup; 719 LstNode *ln; 720 int error_cnt = 0; 721 int remade_cnt = 0; 722 723 Compat_InstallSignalHandlers(); 724 if (curdir != objdir) { 725 if (chdir(curdir) < 0) 726 Fatal("Failed to change directory to %s.", curdir); 727 } 728 729 Lst_Init(&cleanup); 730 LST_FOREACH(ln, &source_makefiles) { 731 LstNode *ln2; 732 struct GNode *gn; 733 const char *name = Lst_Datum(ln); 734 Boolean saveTouchFlag = touchFlag; 735 Boolean saveQueryFlag = queryFlag; 736 Boolean saveNoExecute = noExecute; 737 int mtime; 738 739 /* 740 * Create node 741 */ 742 gn = Targ_FindNode(name, TARG_CREATE); 743 DEBUGF(MAKE, ("Checking %s...", gn->name)); 744 Suff_FindDeps(gn); 745 746 /* 747 * -t, -q and -n has no effect unless the makefile is 748 * specified as one of the targets explicitly in the 749 * command line 750 */ 751 LST_FOREACH(ln2, &create) { 752 if (!strcmp(gn->name, Lst_Datum(ln2))) { 753 /* found as a target */ 754 break; 755 } 756 } 757 if (ln2 == NULL) { 758 touchFlag = FALSE; 759 queryFlag = FALSE; 760 noExecute = FALSE; 761 } 762 763 /* 764 * Check and remake the makefile 765 */ 766 mtime = Dir_MTime(gn); 767 remakingMakefiles = TRUE; 768 Compat_Make(gn, gn); 769 remakingMakefiles = FALSE; 770 771 /* 772 * Restore -t, -q and -n behaviour 773 */ 774 touchFlag = saveTouchFlag; 775 queryFlag = saveQueryFlag; 776 noExecute = saveNoExecute; 777 778 /* 779 * Compat_Make will leave the 'made' field of gn 780 * in one of the following states: 781 * UPTODATE gn was already up-to-date 782 * MADE gn was recreated successfully 783 * ERROR An error occurred while gn was being created 784 * ABORTED gn was not remade because one of its inferiors 785 * could not be made due to errors. 786 */ 787 if (gn->made == MADE) { 788 if (mtime != Dir_MTime(gn)) { 789 DEBUGF(MAKE, 790 ("%s updated (%d -> %d).\n", 791 gn->name, mtime, gn->mtime)); 792 remade_cnt++; 793 } else { 794 DEBUGF(MAKE, 795 ("%s not updated: skipping restart.\n", 796 gn->name)); 797 } 798 } else if (gn->made == ERROR) 799 error_cnt++; 800 else if (gn->made == ABORTED) { 801 printf("`%s' not remade because of errors.\n", 802 gn->name); 803 error_cnt++; 804 } else if (gn->made == UPTODATE) { 805 Lst_EnQueue(&cleanup, gn); 806 } 807 } 808 809 if (error_cnt > 0) 810 Fatal("Failed to remake Makefiles."); 811 if (remade_cnt > 0) { 812 DEBUGF(MAKE, ("Restarting `%s'.\n", save_argv[0])); 813 814 /* 815 * Some of makefiles were remade -- restart from clean state 816 */ 817 if (save_makeflags != NULL) 818 setenv("MAKEFLAGS", save_makeflags, 1); 819 else 820 unsetenv("MAKEFLAGS"); 821 if (execvp(save_argv[0], save_argv) < 0) { 822 Fatal("Can't restart `%s': %s.", 823 save_argv[0], strerror(errno)); 824 } 825 } 826 827 while (!Lst_IsEmpty(&cleanup)) { 828 GNode *gn = Lst_DeQueue(&cleanup); 829 830 gn->unmade = 0; 831 gn->make = FALSE; 832 gn->made = UNMADE; 833 gn->childMade = FALSE; 834 gn->mtime = gn->cmtime = 0; 835 gn->cmtime_gn = NULL; 836 837 LST_FOREACH(ln, &gn->children) { 838 GNode *cgn = Lst_Datum(ln); 839 840 gn->unmade++; 841 Lst_EnQueue(&cleanup, cgn); 842 } 843 } 844 845 if (curdir != objdir) { 846 if (chdir(objdir) < 0) 847 Fatal("Failed to change directory to %s.", objdir); 848 } 849} 850 851/** 852 * main 853 * The main function, for obvious reasons. Initializes variables 854 * and a few modules, then parses the arguments give it in the 855 * environment and on the command line. Reads the system makefile 856 * followed by either Makefile, makefile or the file given by the 857 * -f argument. Sets the .MAKEFLAGS PMake variable based on all the 858 * flags it has received by then uses either the Make or the Compat 859 * module to create the initial list of targets. 860 * 861 * Results: 862 * If -q was given, exits -1 if anything was out-of-date. Else it exits 863 * 0. 864 * 865 * Side Effects: 866 * The program exits when done. Targets are created. etc. etc. etc. 867 */ 868int 869main(int argc, char **argv) 870{ 871 const char *machine; 872 const char *machine_arch; 873 const char *machine_cpu; 874 Boolean outOfDate = TRUE; /* FALSE if all targets up to date */ 875 const char *p; 876 const char *pathp; 877 const char *path; 878 char mdpath[MAXPATHLEN]; 879 char obpath[MAXPATHLEN]; 880 char cdpath[MAXPATHLEN]; 881 char found_dir[MAXPATHLEN + 1]; /* for searching for sys.mk */ 882 char *cp = NULL, *start; 883 884 save_argv = argv; 885 save_makeflags = getenv("MAKEFLAGS"); 886 if (save_makeflags != NULL) 887 save_makeflags = estrdup(save_makeflags); 888 889 /* 890 * Initialize file global variables. 891 */ 892 expandVars = TRUE; 893 noBuiltins = FALSE; /* Read the built-in rules */ 894 forceJobs = FALSE; /* No -j flag */ 895 curdir = cdpath; 896 897 /* 898 * Initialize program global variables. 899 */ 900 beSilent = FALSE; /* Print commands as executed */ 901 ignoreErrors = FALSE; /* Pay attention to non-zero returns */ 902 noExecute = FALSE; /* Execute all commands */ 903 printGraphOnly = FALSE; /* Don't stop after printing graph */ 904 keepgoing = FALSE; /* Stop on error */ 905 allPrecious = FALSE; /* Remove targets when interrupted */ 906 queryFlag = FALSE; /* This is not just a check-run */ 907 touchFlag = FALSE; /* Actually update targets */ 908 usePipes = TRUE; /* Catch child output in pipes */ 909 debug = 0; /* No debug verbosity, please. */ 910 jobsRunning = FALSE; 911 912 jobLimit = DEFMAXJOBS; 913 compatMake = FALSE; /* No compat mode */ 914 915 check_make_level(); 916 917#ifdef RLIMIT_NOFILE 918 /* 919 * get rid of resource limit on file descriptors 920 */ 921 { 922 struct rlimit rl; 923 if (getrlimit(RLIMIT_NOFILE, &rl) == -1) { 924 err(2, "getrlimit"); 925 } 926 rl.rlim_cur = rl.rlim_max; 927 if (setrlimit(RLIMIT_NOFILE, &rl) == -1) { 928 err(2, "setrlimit"); 929 } 930 } 931#endif 932 933 /* 934 * Prior to 7.0, FreeBSD/pc98 kernel used to set the 935 * utsname.machine to "i386", and MACHINE was defined as 936 * "i386", so it could not be distinguished from FreeBSD/i386. 937 * Therefore, we had to check machine.ispc98 and adjust the 938 * MACHINE variable. NOTE: The code is still here to be able 939 * to compile new make binary on old FreeBSD/pc98 systems, and 940 * have the MACHINE variable set properly. 941 */ 942 if ((machine = getenv("MACHINE")) == NULL) { 943 int ispc98; 944 size_t len; 945 946 len = sizeof(ispc98); 947 if (!sysctlbyname("machdep.ispc98", &ispc98, &len, NULL, 0)) { 948 if (ispc98) 949 machine = "pc98"; 950 } 951 } 952 953 /* 954 * Get the name of this type of MACHINE from utsname 955 * so we can share an executable for similar machines. 956 * (i.e. m68k: amiga hp300, mac68k, sun3, ...) 957 * 958 * Note that both MACHINE and MACHINE_ARCH are decided at 959 * run-time. 960 */ 961 if (machine == NULL) { 962 static struct utsname utsname; 963 964 if (uname(&utsname) == -1) 965 err(2, "uname"); 966 machine = utsname.machine; 967 } 968 969 if ((machine_arch = getenv("MACHINE_ARCH")) == NULL) { 970#ifdef MACHINE_ARCH 971 machine_arch = MACHINE_ARCH; 972#else 973 machine_arch = "unknown"; 974#endif 975 } 976 977 /* 978 * Set machine_cpu to the minumum supported CPU revision based 979 * on the target architecture, if not already set. 980 */ 981 if ((machine_cpu = getenv("MACHINE_CPU")) == NULL) { 982 if (!strcmp(machine_arch, "i386")) 983 machine_cpu = "i386"; 984 else 985 machine_cpu = "unknown"; 986 } 987 988 /* 989 * Initialize the parsing, directory and variable modules to prepare 990 * for the reading of inclusion paths and variable settings on the 991 * command line 992 */ 993 Proc_Init(); 994 995 Dir_Init(); /* Initialize directory structures so -I flags 996 * can be processed correctly */ 997 Var_Init(environ); /* As well as the lists of variables for 998 * parsing arguments */ 999 1000 /* 1001 * Initialize the Shell so that we have a shell for != assignments 1002 * on the command line. 1003 */ 1004 Shell_Init(); 1005 1006 /* 1007 * Initialize various variables. 1008 * MAKE also gets this name, for compatibility 1009 * .MAKEFLAGS gets set to the empty string just in case. 1010 * MFLAGS also gets initialized empty, for compatibility. 1011 */ 1012 Var_SetGlobal("MAKE", argv[0]); 1013 Var_SetGlobal(".MAKEFLAGS", ""); 1014 Var_SetGlobal("MFLAGS", ""); 1015 Var_SetGlobal("MACHINE", machine); 1016 Var_SetGlobal("MACHINE_ARCH", machine_arch); 1017 Var_SetGlobal("MACHINE_CPU", machine_cpu); 1018#ifdef MAKE_VERSION 1019 Var_SetGlobal("MAKE_VERSION", MAKE_VERSION); 1020#endif 1021 Var_SetGlobal(".newline", "\n"); /* handy for :@ loops */ 1022 { 1023 char tmp[64]; 1024 1025 snprintf(tmp, sizeof(tmp), "%u", getpid()); 1026 Var_SetGlobal(".MAKE.PID", tmp); 1027 snprintf(tmp, sizeof(tmp), "%u", getppid()); 1028 Var_SetGlobal(".MAKE.PPID", tmp); 1029 } 1030 Job_SetPrefix(); 1031 1032 /* 1033 * Find where we are... 1034 */ 1035 if (getcwd(curdir, MAXPATHLEN) == NULL) 1036 err(2, NULL); 1037 1038 /* 1039 * First snag things out of the MAKEFLAGS environment 1040 * variable. Then parse the command line arguments. 1041 */ 1042 Main_ParseArgLine(getenv("MAKEFLAGS"), 1); 1043 1044 MainParseArgs(argc, argv); 1045 1046 /* 1047 * Verify that cwd is sane (after -C may have changed it). 1048 */ 1049 { 1050 struct stat sa; 1051 1052 if (stat(curdir, &sa) == -1) 1053 err(2, "%s", curdir); 1054 } 1055 1056 /* 1057 * The object directory location is determined using the 1058 * following order of preference: 1059 * 1060 * 1. MAKEOBJDIRPREFIX`cwd` 1061 * 2. MAKEOBJDIR 1062 * 3. PATH_OBJDIR.${MACHINE} 1063 * 4. PATH_OBJDIR 1064 * 5. PATH_OBJDIRPREFIX`cwd` 1065 * 1066 * If one of the first two fails, use the current directory. 1067 * If the remaining three all fail, use the current directory. 1068 * 1069 * Once things are initted, 1070 * have to add the original directory to the search path, 1071 * and modify the paths for the Makefiles apropriately. The 1072 * current directory is also placed as a variable for make scripts. 1073 */ 1074 if (!(pathp = getenv("MAKEOBJDIRPREFIX"))) { 1075 if (!(path = getenv("MAKEOBJDIR"))) { 1076 path = PATH_OBJDIR; 1077 pathp = PATH_OBJDIRPREFIX; 1078 snprintf(mdpath, MAXPATHLEN, "%s.%s", path, machine); 1079 if (!(objdir = chdir_verify_path(mdpath, obpath))) 1080 if (!(objdir=chdir_verify_path(path, obpath))) { 1081 snprintf(mdpath, MAXPATHLEN, 1082 "%s%s", pathp, curdir); 1083 if (!(objdir=chdir_verify_path(mdpath, 1084 obpath))) 1085 objdir = curdir; 1086 } 1087 } 1088 else if (!(objdir = chdir_verify_path(path, obpath))) 1089 objdir = curdir; 1090 } 1091 else { 1092 snprintf(mdpath, MAXPATHLEN, "%s%s", pathp, curdir); 1093 if (!(objdir = chdir_verify_path(mdpath, obpath))) 1094 objdir = curdir; 1095 } 1096 Dir_InitDot(); /* Initialize the "." directory */ 1097 if (objdir != curdir) 1098 Path_AddDir(&dirSearchPath, curdir); 1099 Var_SetGlobal(".ST_EXPORTVAR", "YES"); 1100 Var_SetGlobal(".CURDIR", curdir); 1101 Var_SetGlobal(".OBJDIR", objdir); 1102 1103 if (getenv("MAKE_JOBS_FIFO") != NULL) 1104 forceJobs = TRUE; 1105 /* 1106 * Be compatible if user did not specify -j and did not explicitly 1107 * turned compatibility on 1108 */ 1109 if (!compatMake && !forceJobs) 1110 compatMake = TRUE; 1111 1112 /* 1113 * Initialize target and suffix modules in preparation for 1114 * parsing the makefile(s) 1115 */ 1116 Targ_Init(); 1117 Suff_Init(); 1118 1119 DEFAULT = NULL; 1120 time(&now); 1121 1122 /* 1123 * Set up the .TARGETS variable to contain the list of targets to be 1124 * created. If none specified, make the variable empty -- the parser 1125 * will fill the thing in with the default or .MAIN target. 1126 */ 1127 if (Lst_IsEmpty(&create)) { 1128 Var_SetGlobal(".TARGETS", ""); 1129 } else { 1130 LstNode *ln; 1131 1132 for (ln = Lst_First(&create); ln != NULL; ln = Lst_Succ(ln)) { 1133 char *name = Lst_Datum(ln); 1134 1135 Var_Append(".TARGETS", name, VAR_GLOBAL); 1136 } 1137 } 1138 1139 1140 /* 1141 * If no user-supplied system path was given (through the -m option) 1142 * add the directories from the DEFSYSPATH (more than one may be given 1143 * as dir1:...:dirn) to the system include path. 1144 */ 1145 if (TAILQ_EMPTY(&sysIncPath)) { 1146 char defsyspath[] = PATH_DEFSYSPATH; 1147 char *syspath = getenv("MAKESYSPATH"); 1148 1149 /* 1150 * If no user-supplied system path was given (thru -m option) 1151 * add the directories from the DEFSYSPATH (more than one may 1152 * be given as dir1:...:dirn) to the system include path. 1153 */ 1154 if (syspath == NULL || *syspath == '\0') 1155 syspath = defsyspath; 1156 else 1157 syspath = estrdup(syspath); 1158 1159 for (start = syspath; *start != '\0'; start = cp) { 1160 for (cp = start; *cp != '\0' && *cp != ':'; cp++) 1161 continue; 1162 if (*cp == ':') { 1163 *cp++ = '\0'; 1164 } 1165 /* look for magic parent directory search string */ 1166 if (strncmp(".../", start, 4) == 0) { 1167 if (Dir_FindHereOrAbove(curdir, start + 4, 1168 found_dir, sizeof(found_dir))) { 1169 Path_AddDir(&sysIncPath, found_dir); 1170 } 1171 } else { 1172 Path_AddDir(&sysIncPath, start); 1173 } 1174 } 1175 if (syspath != defsyspath) 1176 free(syspath); 1177 } 1178 1179 /* 1180 * Read in the built-in rules first, followed by the specified 1181 * makefile, if it was (makefile != (char *) NULL), or the default 1182 * Makefile and makefile, in that order, if it wasn't. 1183 */ 1184 if (!noBuiltins) { 1185 /* Path of sys.mk */ 1186 Lst sysMkPath = Lst_Initializer(sysMkPath); 1187 LstNode *ln; 1188 char defsysmk[] = PATH_DEFSYSMK; 1189 1190 Path_Expand(defsysmk, &sysIncPath, &sysMkPath); 1191 if (Lst_IsEmpty(&sysMkPath)) 1192 Fatal("make: no system rules (%s).", PATH_DEFSYSMK); 1193 LST_FOREACH(ln, &sysMkPath) { 1194 if (!ReadMakefile(Lst_Datum(ln))) 1195 break; 1196 } 1197 if (ln != NULL) 1198 Fatal("make: cannot open %s.", (char *)Lst_Datum(ln)); 1199 Lst_Destroy(&sysMkPath, free); 1200 } 1201 1202 if (!Lst_IsEmpty(&makefiles)) { 1203 LstNode *ln; 1204 1205 LST_FOREACH(ln, &makefiles) { 1206 if (!TryReadMakefile(Lst_Datum(ln))) 1207 break; 1208 } 1209 if (ln != NULL) 1210 Fatal("make: cannot open %s.", (char *)Lst_Datum(ln)); 1211 } else if (!TryReadMakefile("BSDmakefile")) 1212 if (!TryReadMakefile("makefile")) 1213 TryReadMakefile("Makefile"); 1214 1215 ReadMakefile(".depend"); 1216 1217 /* Install all the flags into the MAKEFLAGS envariable. */ 1218 if (((p = Var_Value(".MAKEFLAGS", VAR_GLOBAL)) != NULL) && *p) 1219 setenv("MAKEFLAGS", p, 1); 1220 else 1221 setenv("MAKEFLAGS", "", 1); 1222 1223 /* 1224 * For compatibility, look at the directories in the VPATH variable 1225 * and add them to the search path, if the variable is defined. The 1226 * variable's value is in the same format as the PATH envariable, i.e. 1227 * <directory>:<directory>:<directory>... 1228 */ 1229 if (Var_Exists("VPATH", VAR_CMD)) { 1230 /* 1231 * GCC stores string constants in read-only memory, but 1232 * Var_Subst will want to write this thing, so store it 1233 * in an array 1234 */ 1235 static char VPATH[] = "${VPATH}"; 1236 Buffer *buf; 1237 char *vpath; 1238 char *ptr; 1239 char savec; 1240 1241 buf = Var_Subst(VPATH, VAR_CMD, FALSE); 1242 1243 vpath = Buf_Data(buf); 1244 do { 1245 /* skip to end of directory */ 1246 for (ptr = vpath; *ptr != ':' && *ptr != '\0'; ptr++) 1247 ; 1248 1249 /* Save terminator character so know when to stop */ 1250 savec = *ptr; 1251 *ptr = '\0'; 1252 1253 /* Add directory to search path */ 1254 Path_AddDir(&dirSearchPath, vpath); 1255 1256 vpath = ptr + 1; 1257 } while (savec != '\0'); 1258 1259 Buf_Destroy(buf, TRUE); 1260 } 1261 1262 /* 1263 * Now that all search paths have been read for suffixes et al, it's 1264 * time to add the default search path to their lists... 1265 */ 1266 Suff_DoPaths(); 1267 1268 /* print the initial graph, if the user requested it */ 1269 if (DEBUG(GRAPH1)) 1270 Targ_PrintGraph(1); 1271 1272 /* print the values of any variables requested by the user */ 1273 if (Lst_IsEmpty(&variables) && !printGraphOnly) { 1274 /* 1275 * Since the user has not requested that any variables 1276 * be printed, we can build targets. 1277 * 1278 * Have read the entire graph and need to make a list of targets 1279 * to create. If none was given on the command line, we consult 1280 * the parsing module to find the main target(s) to create. 1281 */ 1282 Lst targs = Lst_Initializer(targs); 1283 1284 if (!is_posix && mfAutoDeps) { 1285 /* 1286 * Check if any of the makefiles are out-of-date. 1287 */ 1288 Remake_Makefiles(); 1289 } 1290 1291 if (Lst_IsEmpty(&create)) 1292 Parse_MainName(&targs); 1293 else 1294 Targ_FindList(&targs, &create, TARG_CREATE); 1295 1296 if (compatMake) { 1297 /* 1298 * Compat_Init will take care of creating 1299 * all the targets as well as initializing 1300 * the module. 1301 */ 1302 Compat_Run(&targs); 1303 outOfDate = 0; 1304 } else { 1305 /* 1306 * Initialize job module before traversing 1307 * the graph, now that any .BEGIN and .END 1308 * targets have been read. This is done 1309 * only if the -q flag wasn't given (to 1310 * prevent the .BEGIN from being executed 1311 * should it exist). 1312 */ 1313 if (!queryFlag) { 1314 Job_Init(jobLimit); 1315 jobsRunning = TRUE; 1316 } 1317 1318 /* Traverse the graph, checking on all the targets */ 1319 outOfDate = Make_Run(&targs); 1320 } 1321 Lst_Destroy(&targs, NOFREE); 1322 1323 } else { 1324 Var_Print(&variables, expandVars); 1325 } 1326 1327 Lst_Destroy(&variables, free); 1328 Lst_Destroy(&makefiles, free); 1329 Lst_Destroy(&source_makefiles, free); 1330 Lst_Destroy(&create, free); 1331 1332 /* print the graph now it's been processed if the user requested it */ 1333 if (DEBUG(GRAPH2)) 1334 Targ_PrintGraph(2); 1335 1336 if (queryFlag) 1337 return (outOfDate); 1338 1339 if (makeErrors != 0) 1340 Finish(makeErrors); 1341 1342 return (0); 1343} 1344