main.c revision 170179
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 170179 2007-06-01 04:20:19Z fjoe $"); 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 beSilent; /* -s flag */ 127Boolean beVerbose; /* -v flag */ 128Boolean compatMake; /* -B argument */ 129int debug; /* -d flag */ 130Boolean ignoreErrors; /* -i flag */ 131int jobLimit; /* -j argument */ 132Boolean jobsRunning; /* TRUE if the jobs might be running */ 133Boolean keepgoing; /* -k flag */ 134Boolean noExecute; /* -n flag */ 135Boolean queryFlag; /* -q flag */ 136Boolean touchFlag; /* -t flag */ 137Boolean usePipes; /* !-P flag */ 138uint32_t warn_cmd; /* command line warning flags */ 139uint32_t warn_flags; /* actual warning flags */ 140uint32_t warn_nocmd; /* command line no-warning flags */ 141 142time_t now; /* Time at start of make */ 143struct GNode *DEFAULT; /* .DEFAULT node */ 144 145/** 146 * Exit with usage message. 147 */ 148static void 149usage(void) 150{ 151 fprintf(stderr, 152 "usage: make [-BPSXeiknqrstv] [-C directory] [-D variable]\n" 153 "\t[-d flags] [-E variable] [-f makefile] [-I directory]\n" 154 "\t[-j max_jobs] [-m directory] [-V variable]\n" 155 "\t[variable=value] [target ...]\n"); 156 exit(2); 157} 158 159/** 160 * MFLAGS_append 161 * Append a flag with an optional argument to MAKEFLAGS and MFLAGS 162 */ 163static void 164MFLAGS_append(const char *flag, char *arg) 165{ 166 char *str; 167 168 Var_Append(".MAKEFLAGS", flag, VAR_GLOBAL); 169 if (arg != NULL) { 170 str = MAKEFLAGS_quote(arg); 171 Var_Append(".MAKEFLAGS", str, VAR_GLOBAL); 172 free(str); 173 } 174 175 Var_Append("MFLAGS", flag, VAR_GLOBAL); 176 if (arg != NULL) { 177 str = MAKEFLAGS_quote(arg); 178 Var_Append("MFLAGS", str, VAR_GLOBAL); 179 free(str); 180 } 181} 182 183/** 184 * Main_ParseWarn 185 * 186 * Handle argument to warning option. 187 */ 188int 189Main_ParseWarn(const char *arg, int iscmd) 190{ 191 int i, neg; 192 193 static const struct { 194 const char *option; 195 uint32_t flag; 196 } options[] = { 197 { "dirsyntax", WARN_DIRSYNTAX }, 198 { NULL, 0 } 199 }; 200 201 neg = 0; 202 if (arg[0] == 'n' && arg[1] == 'o') { 203 neg = 1; 204 arg += 2; 205 } 206 207 for (i = 0; options[i].option != NULL; i++) 208 if (strcmp(arg, options[i].option) == 0) 209 break; 210 211 if (options[i].option == NULL) 212 /* unknown option */ 213 return (-1); 214 215 if (iscmd) { 216 if (!neg) { 217 warn_cmd |= options[i].flag; 218 warn_nocmd &= ~options[i].flag; 219 warn_flags |= options[i].flag; 220 } else { 221 warn_nocmd |= options[i].flag; 222 warn_cmd &= ~options[i].flag; 223 warn_flags &= ~options[i].flag; 224 } 225 } else { 226 if (!neg) { 227 warn_flags |= (options[i].flag & ~warn_nocmd); 228 } else { 229 warn_flags &= ~(options[i].flag | warn_cmd); 230 } 231 } 232 return (0); 233} 234 235/** 236 * Open and parse the given makefile. 237 * 238 * Results: 239 * TRUE if ok. FALSE if couldn't open file. 240 */ 241static Boolean 242ReadMakefile(const char p[]) 243{ 244 char *fname, *fnamesave; /* makefile to read */ 245 FILE *stream; 246 char *name, path[MAXPATHLEN]; 247 char *MAKEFILE; 248 int setMAKEFILE; 249 250 /* XXX - remove this once constification is done */ 251 fnamesave = fname = estrdup(p); 252 253 if (!strcmp(fname, "-")) { 254 Parse_File("(stdin)", stdin); 255 Var_SetGlobal("MAKEFILE", ""); 256 } else { 257 setMAKEFILE = strcmp(fname, ".depend"); 258 259 /* if we've chdir'd, rebuild the path name */ 260 if (curdir != objdir && *fname != '/') { 261 snprintf(path, MAXPATHLEN, "%s/%s", curdir, fname); 262 /* 263 * XXX The realpath stuff breaks relative includes 264 * XXX in some cases. The problem likely is in 265 * XXX parse.c where it does special things in 266 * XXX ParseDoInclude if the file is relateive 267 * XXX or absolute and not a system file. There 268 * XXX it assumes that if the current file that's 269 * XXX being included is absolute, that any files 270 * XXX that it includes shouldn't do the -I path 271 * XXX stuff, which is inconsistant with historical 272 * XXX behavior. However, I can't pentrate the mists 273 * XXX further, so I'm putting this workaround in 274 * XXX here until such time as the underlying bug 275 * XXX can be fixed. 276 */ 277#if THIS_BREAKS_THINGS 278 if (realpath(path, path) != NULL && 279 (stream = fopen(path, "r")) != NULL) { 280 MAKEFILE = fname; 281 fname = path; 282 goto found; 283 } 284 } else if (realpath(fname, path) != NULL) { 285 MAKEFILE = fname; 286 fname = path; 287 if ((stream = fopen(fname, "r")) != NULL) 288 goto found; 289 } 290#else 291 if ((stream = fopen(path, "r")) != NULL) { 292 MAKEFILE = fname; 293 fname = path; 294 goto found; 295 } 296 } else { 297 MAKEFILE = fname; 298 if ((stream = fopen(fname, "r")) != NULL) 299 goto found; 300 } 301#endif 302 /* look in -I and system include directories. */ 303 name = Path_FindFile(fname, &parseIncPath); 304 if (!name) 305 name = Path_FindFile(fname, &sysIncPath); 306 if (!name || !(stream = fopen(name, "r"))) { 307 free(fnamesave); 308 return (FALSE); 309 } 310 MAKEFILE = fname = name; 311 /* 312 * set the MAKEFILE variable desired by System V fans -- the 313 * placement of the setting here means it gets set to the last 314 * makefile specified, as it is set by SysV make. 315 */ 316found: 317 if (setMAKEFILE) 318 Var_SetGlobal("MAKEFILE", MAKEFILE); 319 Parse_File(fname, stream); 320 } 321 free(fnamesave); 322 return (TRUE); 323} 324 325/** 326 * Open and parse the given makefile. 327 * If open is successful add it to the list of makefiles. 328 * 329 * Results: 330 * TRUE if ok. FALSE if couldn't open file. 331 */ 332static Boolean 333TryReadMakefile(const char p[]) 334{ 335 char *data; 336 LstNode *last = Lst_Last(&source_makefiles); 337 338 if (!ReadMakefile(p)) 339 return (FALSE); 340 341 data = estrdup(p); 342 if (last == NULL) { 343 LstNode *first = Lst_First(&source_makefiles); 344 Lst_Insert(&source_makefiles, first, data); 345 } else 346 Lst_Append(&source_makefiles, last, estrdup(p)); 347 return (TRUE); 348} 349 350/** 351 * MainParseArgs 352 * Parse a given argument vector. Called from main() and from 353 * Main_ParseArgLine() when the .MAKEFLAGS target is used. 354 * 355 * XXX: Deal with command line overriding .MAKEFLAGS in makefile 356 * 357 * Side Effects: 358 * Various global and local flags will be set depending on the flags 359 * given 360 */ 361static void 362MainParseArgs(int argc, char **argv) 363{ 364 int c; 365 Boolean found_dd = FALSE; 366 367rearg: 368 optind = 1; /* since we're called more than once */ 369 optreset = 1; 370#define OPTFLAGS "ABC:D:E:I:PSV:Xd:ef:ij:km:nqrstvx:" 371 for (;;) { 372 if ((optind < argc) && strcmp(argv[optind], "--") == 0) { 373 found_dd = TRUE; 374 } 375 if ((c = getopt(argc, argv, OPTFLAGS)) == -1) { 376 break; 377 } 378 switch(c) { 379 380 case 'A': 381 arch_fatal = FALSE; 382 MFLAGS_append("-A", NULL); 383 break; 384 case 'C': 385 if (chdir(optarg) == -1) 386 err(1, "chdir %s", optarg); 387 break; 388 case 'D': 389 Var_SetGlobal(optarg, "1"); 390 MFLAGS_append("-D", optarg); 391 break; 392 case 'I': 393 Parse_AddIncludeDir(optarg); 394 MFLAGS_append("-I", optarg); 395 break; 396 case 'V': 397 Lst_AtEnd(&variables, estrdup(optarg)); 398 MFLAGS_append("-V", optarg); 399 break; 400 case 'X': 401 expandVars = FALSE; 402 break; 403 case 'B': 404 compatMake = TRUE; 405 MFLAGS_append("-B", NULL); 406 unsetenv("MAKE_JOBS_FIFO"); 407 break; 408 case 'P': 409 usePipes = FALSE; 410 MFLAGS_append("-P", NULL); 411 break; 412 case 'S': 413 keepgoing = FALSE; 414 MFLAGS_append("-S", NULL); 415 break; 416 case 'd': { 417 char *modules = optarg; 418 419 for (; *modules; ++modules) 420 switch (*modules) { 421 case 'A': 422 debug = ~0; 423 break; 424 case 'a': 425 debug |= DEBUG_ARCH; 426 break; 427 case 'c': 428 debug |= DEBUG_COND; 429 break; 430 case 'd': 431 debug |= DEBUG_DIR; 432 break; 433 case 'f': 434 debug |= DEBUG_FOR; 435 break; 436 case 'g': 437 if (modules[1] == '1') { 438 debug |= DEBUG_GRAPH1; 439 ++modules; 440 } 441 else if (modules[1] == '2') { 442 debug |= DEBUG_GRAPH2; 443 ++modules; 444 } 445 break; 446 case 'j': 447 debug |= DEBUG_JOB; 448 break; 449 case 'l': 450 debug |= DEBUG_LOUD; 451 break; 452 case 'm': 453 debug |= DEBUG_MAKE; 454 break; 455 case 's': 456 debug |= DEBUG_SUFF; 457 break; 458 case 't': 459 debug |= DEBUG_TARG; 460 break; 461 case 'v': 462 debug |= DEBUG_VAR; 463 break; 464 default: 465 warnx("illegal argument to d option " 466 "-- %c", *modules); 467 usage(); 468 } 469 MFLAGS_append("-d", optarg); 470 break; 471 } 472 case 'E': 473 Lst_AtEnd(&envFirstVars, estrdup(optarg)); 474 MFLAGS_append("-E", optarg); 475 break; 476 case 'e': 477 checkEnvFirst = TRUE; 478 MFLAGS_append("-e", NULL); 479 break; 480 case 'f': 481 Lst_AtEnd(&makefiles, estrdup(optarg)); 482 break; 483 case 'i': 484 ignoreErrors = TRUE; 485 MFLAGS_append("-i", NULL); 486 break; 487 case 'j': { 488 char *endptr; 489 490 forceJobs = TRUE; 491 jobLimit = strtol(optarg, &endptr, 10); 492 if (jobLimit <= 0 || *endptr != '\0') { 493 warnx("illegal number, -j argument -- %s", 494 optarg); 495 usage(); 496 } 497 MFLAGS_append("-j", optarg); 498 break; 499 } 500 case 'k': 501 keepgoing = TRUE; 502 MFLAGS_append("-k", NULL); 503 break; 504 case 'm': 505 Path_AddDir(&sysIncPath, optarg); 506 MFLAGS_append("-m", optarg); 507 break; 508 case 'n': 509 noExecute = TRUE; 510 MFLAGS_append("-n", NULL); 511 break; 512 case 'q': 513 queryFlag = TRUE; 514 /* Kind of nonsensical, wot? */ 515 MFLAGS_append("-q", NULL); 516 break; 517 case 'r': 518 noBuiltins = TRUE; 519 MFLAGS_append("-r", NULL); 520 break; 521 case 's': 522 beSilent = TRUE; 523 MFLAGS_append("-s", NULL); 524 break; 525 case 't': 526 touchFlag = TRUE; 527 MFLAGS_append("-t", NULL); 528 break; 529 case 'v': 530 beVerbose = TRUE; 531 MFLAGS_append("-v", NULL); 532 break; 533 case 'x': 534 if (Main_ParseWarn(optarg, 1) != -1) 535 MFLAGS_append("-x", optarg); 536 break; 537 538 default: 539 case '?': 540 usage(); 541 } 542 } 543 argv += optind; 544 argc -= optind; 545 546 oldVars = TRUE; 547 548 /* 549 * Parse the rest of the arguments. 550 * o Check for variable assignments and perform them if so. 551 * o Check for more flags and restart getopt if so. 552 * o Anything else is taken to be a target and added 553 * to the end of the "create" list. 554 */ 555 for (; *argv != NULL; ++argv, --argc) { 556 if (Parse_IsVar(*argv)) { 557 char *ptr = MAKEFLAGS_quote(*argv); 558 char *v = estrdup(*argv); 559 560 Var_Append(".MAKEFLAGS", ptr, VAR_GLOBAL); 561 Parse_DoVar(v, VAR_CMD); 562 free(ptr); 563 free(v); 564 565 } else if ((*argv)[0] == '-') { 566 if ((*argv)[1] == '\0') { 567 /* 568 * (*argv) is a single dash, so we 569 * just ignore it. 570 */ 571 } else if (found_dd) { 572 /* 573 * Double dash has been found, ignore 574 * any more options. But what do we do 575 * with it? For now treat it like a target. 576 */ 577 Lst_AtEnd(&create, estrdup(*argv)); 578 } else { 579 /* 580 * (*argv) is a -flag, so backup argv and 581 * argc. getopt() expects options to start 582 * in the 2nd position. 583 */ 584 argc++; 585 argv--; 586 goto rearg; 587 } 588 589 } else if ((*argv)[0] == '\0') { 590 Punt("illegal (null) argument."); 591 592 } else { 593 Lst_AtEnd(&create, estrdup(*argv)); 594 } 595 } 596} 597 598/** 599 * Main_ParseArgLine 600 * Used by the parse module when a .MFLAGS or .MAKEFLAGS target 601 * is encountered and by main() when reading the .MAKEFLAGS envariable. 602 * Takes a line of arguments and breaks it into its 603 * component words and passes those words and the number of them to the 604 * MainParseArgs function. 605 * The line should have all its leading whitespace removed. 606 * 607 * Side Effects: 608 * Only those that come from the various arguments. 609 */ 610void 611Main_ParseArgLine(char *line, int mflags) 612{ 613 ArgArray aa; 614 615 if (line == NULL) 616 return; 617 for (; *line == ' '; ++line) 618 continue; 619 if (!*line) 620 return; 621 622 if (mflags) 623 MAKEFLAGS_break(&aa, line); 624 else 625 brk_string(&aa, line, TRUE); 626 627 MainParseArgs(aa.argc, aa.argv); 628 ArgArray_Done(&aa); 629} 630 631static char * 632chdir_verify_path(const char *path, char *obpath) 633{ 634 struct stat sb; 635 636 if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) { 637 if (chdir(path) == -1 || getcwd(obpath, MAXPATHLEN) == NULL) { 638 warn("warning: %s", path); 639 return (NULL); 640 } 641 return (obpath); 642 } 643 644 return (NULL); 645} 646 647/** 648 * In lieu of a good way to prevent every possible looping in make(1), stop 649 * there from being more than MKLVL_MAXVAL processes forked by make(1), to 650 * prevent a forkbomb from happening, in a dumb and mechanical way. 651 * 652 * Side Effects: 653 * Creates or modifies enviornment variable MKLVL_ENVVAR via setenv(). 654 */ 655static void 656check_make_level(void) 657{ 658#ifdef WANT_ENV_MKLVL 659 char *value = getenv(MKLVL_ENVVAR); 660 int level = (value == NULL) ? 0 : atoi(value); 661 662 if (level < 0) { 663 errc(2, EAGAIN, "Invalid value for recursion level (%d).", 664 level); 665 } else if (level > MKLVL_MAXVAL) { 666 errc(2, EAGAIN, "Max recursion level (%d) exceeded.", 667 MKLVL_MAXVAL); 668 } else { 669 char new_value[32]; 670 sprintf(new_value, "%d", level + 1); 671 setenv(MKLVL_ENVVAR, new_value, 1); 672 } 673#endif /* WANT_ENV_MKLVL */ 674} 675 676/** 677 * Main_AddSourceMakefile 678 * Add a file to the list of source makefiles 679 */ 680void 681Main_AddSourceMakefile(const char *name) 682{ 683 684 Lst_AtEnd(&source_makefiles, estrdup(name)); 685} 686 687/** 688 * Remake_Makefiles 689 * Remake all the makefiles 690 */ 691static void 692Remake_Makefiles(void) 693{ 694 LstNode *ln; 695 int error_cnt = 0; 696 int remade_cnt = 0; 697 698 Compat_InstallSignalHandlers(); 699 if (curdir != objdir) { 700 if (chdir(curdir) < 0) 701 Fatal("Failed to change directory to %s.", curdir); 702 } 703 704 LST_FOREACH(ln, &source_makefiles) { 705 LstNode *ln2; 706 struct GNode *gn; 707 const char *name = Lst_Datum(ln); 708 Boolean saveTouchFlag = touchFlag; 709 Boolean saveQueryFlag = queryFlag; 710 Boolean saveNoExecute = noExecute; 711 int mtime; 712 713 /* 714 * Create node 715 */ 716 gn = Targ_FindNode(name, TARG_CREATE); 717 DEBUGF(MAKE, ("Checking %s...", gn->name)); 718 Suff_FindDeps(gn); 719 720 /* 721 * ! dependencies as well as 722 * dependencies with .FORCE, .EXEC and .PHONY attributes 723 * are skipped to prevent infinite loops 724 */ 725 if (gn->type & (OP_FORCE | OP_EXEC | OP_PHONY)) { 726 DEBUGF(MAKE, ("skipping (force, exec or phony).\n", 727 gn->name)); 728 continue; 729 } 730 731 /* 732 * Skip :: targets that have commands and no children 733 * because such targets are always out-of-date 734 */ 735 if ((gn->type & OP_DOUBLEDEP) && 736 !Lst_IsEmpty(&gn->commands) && 737 Lst_IsEmpty(&gn->children)) { 738 DEBUGF(MAKE, ("skipping (doubledep, no sources " 739 "and has commands).\n")); 740 continue; 741 } 742 743 /* 744 * Skip targets without sources and without commands 745 */ 746 if (Lst_IsEmpty(&gn->commands) && 747 Lst_IsEmpty(&gn->children)) { 748 DEBUGF(MAKE, 749 ("skipping (no sources and no commands).\n")); 750 continue; 751 } 752 753 DEBUGF(MAKE, ("\n")); 754 755 /* 756 * -t, -q and -n has no effect unless the makefile is 757 * specified as one of the targets explicitly in the 758 * command line 759 */ 760 LST_FOREACH(ln2, &create) { 761 if (!strcmp(gn->name, Lst_Datum(ln2))) { 762 /* found as a target */ 763 break; 764 } 765 } 766 if (ln2 == NULL) { 767 touchFlag = FALSE; 768 queryFlag = FALSE; 769 noExecute = FALSE; 770 } 771 772 /* 773 * Check and remake the makefile 774 */ 775 mtime = Dir_MTime(gn); 776 Compat_Make(gn, gn); 777 778 /* 779 * Restore -t, -q and -n behaviour 780 */ 781 touchFlag = saveTouchFlag; 782 queryFlag = saveQueryFlag; 783 noExecute = saveNoExecute; 784 785 /* 786 * Compat_Make will leave the 'made' field of gn 787 * in one of the following states: 788 * UPTODATE gn was already up-to-date 789 * MADE gn was recreated successfully 790 * ERROR An error occurred while gn was being created 791 * ABORTED gn was not remade because one of its inferiors 792 * could not be made due to errors. 793 */ 794 if (gn->made == MADE) { 795 if (mtime != Dir_MTime(gn)) { 796 DEBUGF(MAKE, 797 ("%s updated (%d -> %d).\n", 798 gn->name, mtime, gn->mtime)); 799 remade_cnt++; 800 } else { 801 DEBUGF(MAKE, 802 ("%s not updated: skipping restart.\n", 803 gn->name)); 804 } 805 } else if (gn->made == ERROR) 806 error_cnt++; 807 else if (gn->made == ABORTED) { 808 printf("`%s' not remade because of errors.\n", 809 gn->name); 810 error_cnt++; 811 } 812 } 813 814 if (error_cnt > 0) 815 Fatal("Failed to remake Makefiles."); 816 if (remade_cnt > 0) { 817 DEBUGF(MAKE, ("Restarting `%s'.\n", save_argv[0])); 818 819 /* 820 * Some of makefiles were remade -- restart from clean state 821 */ 822 if (save_makeflags != NULL) 823 setenv("MAKEFLAGS", save_makeflags, 1); 824 else 825 unsetenv("MAKEFLAGS"); 826 if (execvp(save_argv[0], save_argv) < 0) { 827 Fatal("Can't restart `%s': %s.", 828 save_argv[0], strerror(errno)); 829 } 830 } 831 832 if (curdir != objdir) { 833 if (chdir(objdir) < 0) 834 Fatal("Failed to change directory to %s.", objdir); 835 } 836} 837 838/** 839 * main 840 * The main function, for obvious reasons. Initializes variables 841 * and a few modules, then parses the arguments give it in the 842 * environment and on the command line. Reads the system makefile 843 * followed by either Makefile, makefile or the file given by the 844 * -f argument. Sets the .MAKEFLAGS PMake variable based on all the 845 * flags it has received by then uses either the Make or the Compat 846 * module to create the initial list of targets. 847 * 848 * Results: 849 * If -q was given, exits -1 if anything was out-of-date. Else it exits 850 * 0. 851 * 852 * Side Effects: 853 * The program exits when done. Targets are created. etc. etc. etc. 854 */ 855int 856main(int argc, char **argv) 857{ 858 const char *machine; 859 const char *machine_arch; 860 const char *machine_cpu; 861 Boolean outOfDate = TRUE; /* FALSE if all targets up to date */ 862 const char *p; 863 const char *pathp; 864 const char *path; 865 char mdpath[MAXPATHLEN]; 866 char obpath[MAXPATHLEN]; 867 char cdpath[MAXPATHLEN]; 868 char *cp = NULL, *start; 869 870 save_argv = argv; 871 save_makeflags = getenv("MAKEFLAGS"); 872 if (save_makeflags != NULL) 873 save_makeflags = estrdup(save_makeflags); 874 875 /* 876 * Initialize file global variables. 877 */ 878 expandVars = TRUE; 879 noBuiltins = FALSE; /* Read the built-in rules */ 880 forceJobs = FALSE; /* No -j flag */ 881 curdir = cdpath; 882 883 /* 884 * Initialize program global variables. 885 */ 886 beSilent = FALSE; /* Print commands as executed */ 887 ignoreErrors = FALSE; /* Pay attention to non-zero returns */ 888 noExecute = FALSE; /* Execute all commands */ 889 keepgoing = FALSE; /* Stop on error */ 890 allPrecious = FALSE; /* Remove targets when interrupted */ 891 queryFlag = FALSE; /* This is not just a check-run */ 892 touchFlag = FALSE; /* Actually update targets */ 893 usePipes = TRUE; /* Catch child output in pipes */ 894 debug = 0; /* No debug verbosity, please. */ 895 jobsRunning = FALSE; 896 897 jobLimit = DEFMAXJOBS; 898 compatMake = FALSE; /* No compat mode */ 899 900 check_make_level(); 901 902#ifdef RLIMIT_NOFILE 903 /* 904 * get rid of resource limit on file descriptors 905 */ 906 { 907 struct rlimit rl; 908 if (getrlimit(RLIMIT_NOFILE, &rl) == -1) { 909 err(2, "getrlimit"); 910 } 911 rl.rlim_cur = rl.rlim_max; 912 if (setrlimit(RLIMIT_NOFILE, &rl) == -1) { 913 err(2, "setrlimit"); 914 } 915 } 916#endif 917 918 /* 919 * FreeBSD/pc98 kernel used to set the utsname.machine to 920 * "i386", and MACHINE was defined as "i386", so it could 921 * not be distinguished from FreeBSD/i386. Therefore, we 922 * had to check machine.ispc98 and adjust the MACHINE 923 * variable. 924 * NOTE: The code is still here to be able to compile new 925 * make binary on old FreeBSD/pc98 systems, and have the 926 * MACHINE variable set properly. 927 */ 928 if ((machine = getenv("MACHINE")) == NULL) { 929 int ispc98; 930 size_t len; 931 932 len = sizeof(ispc98); 933 if (!sysctlbyname("machdep.ispc98", &ispc98, &len, NULL, 0)) { 934 if (ispc98) 935 machine = "pc98"; 936 } 937 } 938 939 /* 940 * Get the name of this type of MACHINE from utsname 941 * so we can share an executable for similar machines. 942 * (i.e. m68k: amiga hp300, mac68k, sun3, ...) 943 * 944 * Note that both MACHINE and MACHINE_ARCH are decided at 945 * run-time. 946 */ 947 if (machine == NULL) { 948 static struct utsname utsname; 949 950 if (uname(&utsname) == -1) 951 err(2, "uname"); 952 machine = utsname.machine; 953 } 954 955 if ((machine_arch = getenv("MACHINE_ARCH")) == NULL) { 956#ifdef MACHINE_ARCH 957 machine_arch = MACHINE_ARCH; 958#else 959 machine_arch = "unknown"; 960#endif 961 } 962 963 /* 964 * Set machine_cpu to the minumum supported CPU revision based 965 * on the target architecture, if not already set. 966 */ 967 if ((machine_cpu = getenv("MACHINE_CPU")) == NULL) { 968 if (!strcmp(machine_arch, "i386")) 969 machine_cpu = "i386"; 970 else if (!strcmp(machine_arch, "alpha")) 971 machine_cpu = "ev4"; 972 else 973 machine_cpu = "unknown"; 974 } 975 976 /* 977 * Initialize the parsing, directory and variable modules to prepare 978 * for the reading of inclusion paths and variable settings on the 979 * command line 980 */ 981 Proc_Init(); 982 983 Dir_Init(); /* Initialize directory structures so -I flags 984 * can be processed correctly */ 985 Var_Init(environ); /* As well as the lists of variables for 986 * parsing arguments */ 987 988 /* 989 * Initialize the Shell so that we have a shell for != assignments 990 * on the command line. 991 */ 992 Shell_Init(); 993 994 /* 995 * Initialize various variables. 996 * MAKE also gets this name, for compatibility 997 * .MAKEFLAGS gets set to the empty string just in case. 998 * MFLAGS also gets initialized empty, for compatibility. 999 */ 1000 Var_SetGlobal("MAKE", argv[0]); 1001 Var_SetGlobal(".MAKEFLAGS", ""); 1002 Var_SetGlobal("MFLAGS", ""); 1003 Var_SetGlobal("MACHINE", machine); 1004 Var_SetGlobal("MACHINE_ARCH", machine_arch); 1005 Var_SetGlobal("MACHINE_CPU", machine_cpu); 1006#ifdef MAKE_VERSION 1007 Var_SetGlobal("MAKE_VERSION", MAKE_VERSION); 1008#endif 1009 1010 /* 1011 * First snag things out of the MAKEFLAGS environment 1012 * variable. Then parse the command line arguments. 1013 */ 1014 Main_ParseArgLine(getenv("MAKEFLAGS"), 1); 1015 1016 MainParseArgs(argc, argv); 1017 1018 /* 1019 * Find where we are... 1020 */ 1021 if (getcwd(curdir, MAXPATHLEN) == NULL) 1022 err(2, NULL); 1023 1024 { 1025 struct stat sa; 1026 1027 if (stat(curdir, &sa) == -1) 1028 err(2, "%s", curdir); 1029 } 1030 1031 /* 1032 * The object directory location is determined using the 1033 * following order of preference: 1034 * 1035 * 1. MAKEOBJDIRPREFIX`cwd` 1036 * 2. MAKEOBJDIR 1037 * 3. PATH_OBJDIR.${MACHINE} 1038 * 4. PATH_OBJDIR 1039 * 5. PATH_OBJDIRPREFIX`cwd` 1040 * 1041 * If one of the first two fails, use the current directory. 1042 * If the remaining three all fail, use the current directory. 1043 * 1044 * Once things are initted, 1045 * have to add the original directory to the search path, 1046 * and modify the paths for the Makefiles apropriately. The 1047 * current directory is also placed as a variable for make scripts. 1048 */ 1049 if (!(pathp = getenv("MAKEOBJDIRPREFIX"))) { 1050 if (!(path = getenv("MAKEOBJDIR"))) { 1051 path = PATH_OBJDIR; 1052 pathp = PATH_OBJDIRPREFIX; 1053 snprintf(mdpath, MAXPATHLEN, "%s.%s", path, machine); 1054 if (!(objdir = chdir_verify_path(mdpath, obpath))) 1055 if (!(objdir=chdir_verify_path(path, obpath))) { 1056 snprintf(mdpath, MAXPATHLEN, 1057 "%s%s", pathp, curdir); 1058 if (!(objdir=chdir_verify_path(mdpath, 1059 obpath))) 1060 objdir = curdir; 1061 } 1062 } 1063 else if (!(objdir = chdir_verify_path(path, obpath))) 1064 objdir = curdir; 1065 } 1066 else { 1067 snprintf(mdpath, MAXPATHLEN, "%s%s", pathp, curdir); 1068 if (!(objdir = chdir_verify_path(mdpath, obpath))) 1069 objdir = curdir; 1070 } 1071 Dir_InitDot(); /* Initialize the "." directory */ 1072 if (objdir != curdir) 1073 Path_AddDir(&dirSearchPath, curdir); 1074 Var_SetGlobal(".ST_EXPORTVAR", "YES"); 1075 Var_SetGlobal(".CURDIR", curdir); 1076 Var_SetGlobal(".OBJDIR", objdir); 1077 1078 if (getenv("MAKE_JOBS_FIFO") != NULL) 1079 forceJobs = TRUE; 1080 /* 1081 * Be compatible if user did not specify -j and did not explicitly 1082 * turned compatibility on 1083 */ 1084 if (!compatMake && !forceJobs) 1085 compatMake = TRUE; 1086 1087 /* 1088 * Initialize target and suffix modules in preparation for 1089 * parsing the makefile(s) 1090 */ 1091 Targ_Init(); 1092 Suff_Init(); 1093 1094 DEFAULT = NULL; 1095 time(&now); 1096 1097 /* 1098 * Set up the .TARGETS variable to contain the list of targets to be 1099 * created. If none specified, make the variable empty -- the parser 1100 * will fill the thing in with the default or .MAIN target. 1101 */ 1102 if (Lst_IsEmpty(&create)) { 1103 Var_SetGlobal(".TARGETS", ""); 1104 } else { 1105 LstNode *ln; 1106 1107 for (ln = Lst_First(&create); ln != NULL; ln = Lst_Succ(ln)) { 1108 char *name = Lst_Datum(ln); 1109 1110 Var_Append(".TARGETS", name, VAR_GLOBAL); 1111 } 1112 } 1113 1114 1115 /* 1116 * If no user-supplied system path was given (through the -m option) 1117 * add the directories from the DEFSYSPATH (more than one may be given 1118 * as dir1:...:dirn) to the system include path. 1119 */ 1120 if (TAILQ_EMPTY(&sysIncPath)) { 1121 char syspath[] = PATH_DEFSYSPATH; 1122 1123 for (start = syspath; *start != '\0'; start = cp) { 1124 for (cp = start; *cp != '\0' && *cp != ':'; cp++) 1125 continue; 1126 if (*cp == '\0') { 1127 Path_AddDir(&sysIncPath, start); 1128 } else { 1129 *cp++ = '\0'; 1130 Path_AddDir(&sysIncPath, start); 1131 } 1132 } 1133 } 1134 1135 /* 1136 * Read in the built-in rules first, followed by the specified 1137 * makefile, if it was (makefile != (char *) NULL), or the default 1138 * Makefile and makefile, in that order, if it wasn't. 1139 */ 1140 if (!noBuiltins) { 1141 /* Path of sys.mk */ 1142 Lst sysMkPath = Lst_Initializer(sysMkPath); 1143 LstNode *ln; 1144 char defsysmk[] = PATH_DEFSYSMK; 1145 1146 Path_Expand(defsysmk, &sysIncPath, &sysMkPath); 1147 if (Lst_IsEmpty(&sysMkPath)) 1148 Fatal("make: no system rules (%s).", PATH_DEFSYSMK); 1149 LST_FOREACH(ln, &sysMkPath) { 1150 if (!ReadMakefile(Lst_Datum(ln))) 1151 break; 1152 } 1153 if (ln != NULL) 1154 Fatal("make: cannot open %s.", (char *)Lst_Datum(ln)); 1155 Lst_Destroy(&sysMkPath, free); 1156 } 1157 1158 if (!Lst_IsEmpty(&makefiles)) { 1159 LstNode *ln; 1160 1161 LST_FOREACH(ln, &makefiles) { 1162 if (!TryReadMakefile(Lst_Datum(ln))) 1163 break; 1164 } 1165 if (ln != NULL) 1166 Fatal("make: cannot open %s.", (char *)Lst_Datum(ln)); 1167 } else if (!TryReadMakefile("BSDmakefile")) 1168 if (!TryReadMakefile("makefile")) 1169 TryReadMakefile("Makefile"); 1170 1171 ReadMakefile(".depend"); 1172 1173 /* Install all the flags into the MAKE envariable. */ 1174 if (((p = Var_Value(".MAKEFLAGS", VAR_GLOBAL)) != NULL) && *p) 1175 setenv("MAKEFLAGS", p, 1); 1176 1177 /* 1178 * For compatibility, look at the directories in the VPATH variable 1179 * and add them to the search path, if the variable is defined. The 1180 * variable's value is in the same format as the PATH envariable, i.e. 1181 * <directory>:<directory>:<directory>... 1182 */ 1183 if (Var_Exists("VPATH", VAR_CMD)) { 1184 /* 1185 * GCC stores string constants in read-only memory, but 1186 * Var_Subst will want to write this thing, so store it 1187 * in an array 1188 */ 1189 static char VPATH[] = "${VPATH}"; 1190 Buffer *buf; 1191 char *vpath; 1192 char *ptr; 1193 char savec; 1194 1195 buf = Var_Subst(VPATH, VAR_CMD, FALSE); 1196 1197 vpath = Buf_Data(buf); 1198 do { 1199 /* skip to end of directory */ 1200 for (ptr = vpath; *ptr != ':' && *ptr != '\0'; ptr++) 1201 ; 1202 1203 /* Save terminator character so know when to stop */ 1204 savec = *ptr; 1205 *ptr = '\0'; 1206 1207 /* Add directory to search path */ 1208 Path_AddDir(&dirSearchPath, vpath); 1209 1210 vpath = ptr + 1; 1211 } while (savec != '\0'); 1212 1213 Buf_Destroy(buf, TRUE); 1214 } 1215 1216 /* 1217 * Now that all search paths have been read for suffixes et al, it's 1218 * time to add the default search path to their lists... 1219 */ 1220 Suff_DoPaths(); 1221 1222 /* print the initial graph, if the user requested it */ 1223 if (DEBUG(GRAPH1)) 1224 Targ_PrintGraph(1); 1225 1226 /* print the values of any variables requested by the user */ 1227 if (Lst_IsEmpty(&variables)) { 1228 /* 1229 * Since the user has not requested that any variables 1230 * be printed, we can build targets. 1231 * 1232 * Have read the entire graph and need to make a list of targets 1233 * to create. If none was given on the command line, we consult 1234 * the parsing module to find the main target(s) to create. 1235 */ 1236 Lst targs = Lst_Initializer(targs); 1237 1238 if (!is_posix) { 1239 /* 1240 * Check if any of the makefiles are out-of-date. 1241 */ 1242 Remake_Makefiles(); 1243 } 1244 1245 if (Lst_IsEmpty(&create)) 1246 Parse_MainName(&targs); 1247 else 1248 Targ_FindList(&targs, &create, TARG_CREATE); 1249 1250 if (compatMake) { 1251 /* 1252 * Compat_Init will take care of creating 1253 * all the targets as well as initializing 1254 * the module. 1255 */ 1256 Compat_Run(&targs); 1257 outOfDate = 0; 1258 } else { 1259 /* 1260 * Initialize job module before traversing 1261 * the graph, now that any .BEGIN and .END 1262 * targets have been read. This is done 1263 * only if the -q flag wasn't given (to 1264 * prevent the .BEGIN from being executed 1265 * should it exist). 1266 */ 1267 if (!queryFlag) { 1268 Job_Init(jobLimit); 1269 jobsRunning = TRUE; 1270 } 1271 1272 /* Traverse the graph, checking on all the targets */ 1273 outOfDate = Make_Run(&targs); 1274 } 1275 Lst_Destroy(&targs, NOFREE); 1276 1277 } else { 1278 Var_Print(&variables, expandVars); 1279 } 1280 1281 Lst_Destroy(&variables, free); 1282 Lst_Destroy(&makefiles, free); 1283 Lst_Destroy(&source_makefiles, free); 1284 Lst_Destroy(&create, free); 1285 1286 /* print the graph now it's been processed if the user requested it */ 1287 if (DEBUG(GRAPH2)) 1288 Targ_PrintGraph(2); 1289 1290 if (queryFlag && outOfDate) 1291 return (1); 1292 else 1293 return (0); 1294} 1295 1296