main.c revision 167330
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 167330 2007-03-08 09:16:11Z 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(); 699 700 LST_FOREACH(ln, &source_makefiles) { 701 LstNode *ln2; 702 struct GNode *gn; 703 const char *name = Lst_Datum(ln); 704 Boolean saveTouchFlag = touchFlag; 705 Boolean saveQueryFlag = queryFlag; 706 Boolean saveNoExecute = noExecute; 707 708 /* 709 * Create node 710 */ 711 gn = Targ_FindNode(name, TARG_CREATE); 712 DEBUGF(MAKE, ("Checking %s...", gn->name)); 713 Suff_FindDeps(gn); 714 715 /* 716 * ! dependencies as well as 717 * dependencies with .FORCE, .EXEC and .PHONY attributes 718 * are skipped to prevent infinite loops 719 */ 720 if (gn->type & (OP_FORCE | OP_EXEC | OP_PHONY)) { 721 DEBUGF(MAKE, ("skipping (force, exec or phony).\n", 722 gn->name)); 723 continue; 724 } 725 726 /* 727 * Skip :: targets that have commands and no children 728 * because such targets are always out-of-date 729 */ 730 if ((gn->type & OP_DOUBLEDEP) && 731 !Lst_IsEmpty(&gn->commands) && 732 Lst_IsEmpty(&gn->children)) { 733 DEBUGF(MAKE, ("skipping (doubledep, no sources " 734 "and has commands).\n")); 735 continue; 736 } 737 738 /* 739 * Skip targets without sources and without commands 740 */ 741 if (Lst_IsEmpty(&gn->commands) && 742 Lst_IsEmpty(&gn->children)) { 743 DEBUGF(MAKE, 744 ("skipping (no sources and no commands).\n")); 745 continue; 746 } 747 748 DEBUGF(MAKE, ("\n")); 749 750 /* 751 * -t, -q and -n has no effect unless the makefile is 752 * specified as one of the targets explicitly in the 753 * command line 754 */ 755 LST_FOREACH(ln2, &create) { 756 if (!strcmp(gn->name, Lst_Datum(ln2))) { 757 /* found as a target */ 758 break; 759 } 760 } 761 if (ln2 == NULL) { 762 touchFlag = FALSE; 763 queryFlag = FALSE; 764 noExecute = FALSE; 765 } 766 767 /* 768 * Check and remake the makefile 769 */ 770 Compat_Make(gn, gn); 771 772 /* 773 * Restore -t, -q and -n behaviour 774 */ 775 touchFlag = saveTouchFlag; 776 queryFlag = saveQueryFlag; 777 noExecute = saveNoExecute; 778 779 /* 780 * Compat_Make will leave the 'made' field of gn 781 * in one of the following states: 782 * UPTODATE gn was already up-to-date 783 * MADE gn was recreated successfully 784 * ERROR An error occurred while gn was being created 785 * ABORTED gn was not remade because one of its inferiors 786 * could not be made due to errors. 787 */ 788 if (gn->made == MADE) 789 remade_cnt++; 790 else if (gn->made == ERROR) 791 error_cnt++; 792 else if (gn->made == ABORTED) { 793 printf("`%s' not remade because of errors.\n", 794 gn->name); 795 error_cnt++; 796 } 797 } 798 799 if (error_cnt > 0) 800 Fatal("Failed to remake Makefiles."); 801 if (remade_cnt > 0) { 802 DEBUGF(MAKE, ("Restarting `%s'.\n", save_argv[0])); 803 804 /* 805 * Some of makefiles were remade -- restart from clean state 806 */ 807 if (save_makeflags != NULL) 808 setenv("MAKEFLAGS", save_makeflags, 1); 809 else 810 unsetenv("MAKEFLAGS"); 811 chdir(curdir); 812 if (execvp(save_argv[0], save_argv) < 0) { 813 Fatal("Can't restart `%s': %s.", 814 save_argv[0], strerror(errno)); 815 } 816 } 817} 818 819/** 820 * main 821 * The main function, for obvious reasons. Initializes variables 822 * and a few modules, then parses the arguments give it in the 823 * environment and on the command line. Reads the system makefile 824 * followed by either Makefile, makefile or the file given by the 825 * -f argument. Sets the .MAKEFLAGS PMake variable based on all the 826 * flags it has received by then uses either the Make or the Compat 827 * module to create the initial list of targets. 828 * 829 * Results: 830 * If -q was given, exits -1 if anything was out-of-date. Else it exits 831 * 0. 832 * 833 * Side Effects: 834 * The program exits when done. Targets are created. etc. etc. etc. 835 */ 836int 837main(int argc, char **argv) 838{ 839 const char *machine; 840 const char *machine_arch; 841 const char *machine_cpu; 842 Boolean outOfDate = TRUE; /* FALSE if all targets up to date */ 843 const char *p; 844 const char *pathp; 845 const char *path; 846 char mdpath[MAXPATHLEN]; 847 char obpath[MAXPATHLEN]; 848 char cdpath[MAXPATHLEN]; 849 char *cp = NULL, *start; 850 851 save_argv = argv; 852 save_makeflags = getenv("MAKEFLAGS"); 853 if (save_makeflags != NULL) 854 save_makeflags = estrdup(save_makeflags); 855 856 /* 857 * Initialize file global variables. 858 */ 859 expandVars = TRUE; 860 noBuiltins = FALSE; /* Read the built-in rules */ 861 forceJobs = FALSE; /* No -j flag */ 862 curdir = cdpath; 863 864 /* 865 * Initialize program global variables. 866 */ 867 beSilent = FALSE; /* Print commands as executed */ 868 ignoreErrors = FALSE; /* Pay attention to non-zero returns */ 869 noExecute = FALSE; /* Execute all commands */ 870 keepgoing = FALSE; /* Stop on error */ 871 allPrecious = FALSE; /* Remove targets when interrupted */ 872 queryFlag = FALSE; /* This is not just a check-run */ 873 touchFlag = FALSE; /* Actually update targets */ 874 usePipes = TRUE; /* Catch child output in pipes */ 875 debug = 0; /* No debug verbosity, please. */ 876 jobsRunning = FALSE; 877 878 jobLimit = DEFMAXJOBS; 879 compatMake = FALSE; /* No compat mode */ 880 881 check_make_level(); 882 883#ifdef RLIMIT_NOFILE 884 /* 885 * get rid of resource limit on file descriptors 886 */ 887 { 888 struct rlimit rl; 889 if (getrlimit(RLIMIT_NOFILE, &rl) == -1) { 890 err(2, "getrlimit"); 891 } 892 rl.rlim_cur = rl.rlim_max; 893 if (setrlimit(RLIMIT_NOFILE, &rl) == -1) { 894 err(2, "setrlimit"); 895 } 896 } 897#endif 898 899 /* 900 * FreeBSD/pc98 kernel used to set the utsname.machine to 901 * "i386", and MACHINE was defined as "i386", so it could 902 * not be distinguished from FreeBSD/i386. Therefore, we 903 * had to check machine.ispc98 and adjust the MACHINE 904 * variable. 905 * NOTE: The code is still here to be able to compile new 906 * make binary on old FreeBSD/pc98 systems, and have the 907 * MACHINE variable set properly. 908 */ 909 if ((machine = getenv("MACHINE")) == NULL) { 910 int ispc98; 911 size_t len; 912 913 len = sizeof(ispc98); 914 if (!sysctlbyname("machdep.ispc98", &ispc98, &len, NULL, 0)) { 915 if (ispc98) 916 machine = "pc98"; 917 } 918 } 919 920 /* 921 * Get the name of this type of MACHINE from utsname 922 * so we can share an executable for similar machines. 923 * (i.e. m68k: amiga hp300, mac68k, sun3, ...) 924 * 925 * Note that both MACHINE and MACHINE_ARCH are decided at 926 * run-time. 927 */ 928 if (machine == NULL) { 929 static struct utsname utsname; 930 931 if (uname(&utsname) == -1) 932 err(2, "uname"); 933 machine = utsname.machine; 934 } 935 936 if ((machine_arch = getenv("MACHINE_ARCH")) == NULL) { 937#ifdef MACHINE_ARCH 938 machine_arch = MACHINE_ARCH; 939#else 940 machine_arch = "unknown"; 941#endif 942 } 943 944 /* 945 * Set machine_cpu to the minumum supported CPU revision based 946 * on the target architecture, if not already set. 947 */ 948 if ((machine_cpu = getenv("MACHINE_CPU")) == NULL) { 949 if (!strcmp(machine_arch, "i386")) 950 machine_cpu = "i386"; 951 else if (!strcmp(machine_arch, "alpha")) 952 machine_cpu = "ev4"; 953 else 954 machine_cpu = "unknown"; 955 } 956 957 /* 958 * Initialize the parsing, directory and variable modules to prepare 959 * for the reading of inclusion paths and variable settings on the 960 * command line 961 */ 962 Proc_Init(); 963 964 Dir_Init(); /* Initialize directory structures so -I flags 965 * can be processed correctly */ 966 Var_Init(environ); /* As well as the lists of variables for 967 * parsing arguments */ 968 969 /* 970 * Initialize the Shell so that we have a shell for != assignments 971 * on the command line. 972 */ 973 Shell_Init(); 974 975 /* 976 * Initialize various variables. 977 * MAKE also gets this name, for compatibility 978 * .MAKEFLAGS gets set to the empty string just in case. 979 * MFLAGS also gets initialized empty, for compatibility. 980 */ 981 Var_SetGlobal("MAKE", argv[0]); 982 Var_SetGlobal(".MAKEFLAGS", ""); 983 Var_SetGlobal("MFLAGS", ""); 984 Var_SetGlobal("MACHINE", machine); 985 Var_SetGlobal("MACHINE_ARCH", machine_arch); 986 Var_SetGlobal("MACHINE_CPU", machine_cpu); 987#ifdef MAKE_VERSION 988 Var_SetGlobal("MAKE_VERSION", MAKE_VERSION); 989#endif 990 991 /* 992 * First snag things out of the MAKEFLAGS environment 993 * variable. Then parse the command line arguments. 994 */ 995 Main_ParseArgLine(getenv("MAKEFLAGS"), 1); 996 997 MainParseArgs(argc, argv); 998 999 /* 1000 * Find where we are... 1001 */ 1002 if (getcwd(curdir, MAXPATHLEN) == NULL) 1003 err(2, NULL); 1004 1005 { 1006 struct stat sa; 1007 1008 if (stat(curdir, &sa) == -1) 1009 err(2, "%s", curdir); 1010 } 1011 1012 /* 1013 * The object directory location is determined using the 1014 * following order of preference: 1015 * 1016 * 1. MAKEOBJDIRPREFIX`cwd` 1017 * 2. MAKEOBJDIR 1018 * 3. PATH_OBJDIR.${MACHINE} 1019 * 4. PATH_OBJDIR 1020 * 5. PATH_OBJDIRPREFIX`cwd` 1021 * 1022 * If one of the first two fails, use the current directory. 1023 * If the remaining three all fail, use the current directory. 1024 * 1025 * Once things are initted, 1026 * have to add the original directory to the search path, 1027 * and modify the paths for the Makefiles apropriately. The 1028 * current directory is also placed as a variable for make scripts. 1029 */ 1030 if (!(pathp = getenv("MAKEOBJDIRPREFIX"))) { 1031 if (!(path = getenv("MAKEOBJDIR"))) { 1032 path = PATH_OBJDIR; 1033 pathp = PATH_OBJDIRPREFIX; 1034 snprintf(mdpath, MAXPATHLEN, "%s.%s", path, machine); 1035 if (!(objdir = chdir_verify_path(mdpath, obpath))) 1036 if (!(objdir=chdir_verify_path(path, obpath))) { 1037 snprintf(mdpath, MAXPATHLEN, 1038 "%s%s", pathp, curdir); 1039 if (!(objdir=chdir_verify_path(mdpath, 1040 obpath))) 1041 objdir = curdir; 1042 } 1043 } 1044 else if (!(objdir = chdir_verify_path(path, obpath))) 1045 objdir = curdir; 1046 } 1047 else { 1048 snprintf(mdpath, MAXPATHLEN, "%s%s", pathp, curdir); 1049 if (!(objdir = chdir_verify_path(mdpath, obpath))) 1050 objdir = curdir; 1051 } 1052 Dir_InitDot(); /* Initialize the "." directory */ 1053 if (objdir != curdir) 1054 Path_AddDir(&dirSearchPath, curdir); 1055 Var_SetGlobal(".ST_EXPORTVAR", "YES"); 1056 Var_SetGlobal(".CURDIR", curdir); 1057 Var_SetGlobal(".OBJDIR", objdir); 1058 1059 if (getenv("MAKE_JOBS_FIFO") != NULL) 1060 forceJobs = TRUE; 1061 /* 1062 * Be compatible if user did not specify -j and did not explicitly 1063 * turned compatibility on 1064 */ 1065 if (!compatMake && !forceJobs) 1066 compatMake = TRUE; 1067 1068 /* 1069 * Initialize target and suffix modules in preparation for 1070 * parsing the makefile(s) 1071 */ 1072 Targ_Init(); 1073 Suff_Init(); 1074 1075 DEFAULT = NULL; 1076 time(&now); 1077 1078 /* 1079 * Set up the .TARGETS variable to contain the list of targets to be 1080 * created. If none specified, make the variable empty -- the parser 1081 * will fill the thing in with the default or .MAIN target. 1082 */ 1083 if (Lst_IsEmpty(&create)) { 1084 Var_SetGlobal(".TARGETS", ""); 1085 } else { 1086 LstNode *ln; 1087 1088 for (ln = Lst_First(&create); ln != NULL; ln = Lst_Succ(ln)) { 1089 char *name = Lst_Datum(ln); 1090 1091 Var_Append(".TARGETS", name, VAR_GLOBAL); 1092 } 1093 } 1094 1095 1096 /* 1097 * If no user-supplied system path was given (through the -m option) 1098 * add the directories from the DEFSYSPATH (more than one may be given 1099 * as dir1:...:dirn) to the system include path. 1100 */ 1101 if (TAILQ_EMPTY(&sysIncPath)) { 1102 char syspath[] = PATH_DEFSYSPATH; 1103 1104 for (start = syspath; *start != '\0'; start = cp) { 1105 for (cp = start; *cp != '\0' && *cp != ':'; cp++) 1106 continue; 1107 if (*cp == '\0') { 1108 Path_AddDir(&sysIncPath, start); 1109 } else { 1110 *cp++ = '\0'; 1111 Path_AddDir(&sysIncPath, start); 1112 } 1113 } 1114 } 1115 1116 /* 1117 * Read in the built-in rules first, followed by the specified 1118 * makefile, if it was (makefile != (char *) NULL), or the default 1119 * Makefile and makefile, in that order, if it wasn't. 1120 */ 1121 if (!noBuiltins) { 1122 /* Path of sys.mk */ 1123 Lst sysMkPath = Lst_Initializer(sysMkPath); 1124 LstNode *ln; 1125 char defsysmk[] = PATH_DEFSYSMK; 1126 1127 Path_Expand(defsysmk, &sysIncPath, &sysMkPath); 1128 if (Lst_IsEmpty(&sysMkPath)) 1129 Fatal("make: no system rules (%s).", PATH_DEFSYSMK); 1130 LST_FOREACH(ln, &sysMkPath) { 1131 if (!ReadMakefile(Lst_Datum(ln))) 1132 break; 1133 } 1134 if (ln != NULL) 1135 Fatal("make: cannot open %s.", (char *)Lst_Datum(ln)); 1136 Lst_Destroy(&sysMkPath, free); 1137 } 1138 1139 if (!Lst_IsEmpty(&makefiles)) { 1140 LstNode *ln; 1141 1142 LST_FOREACH(ln, &makefiles) { 1143 if (!TryReadMakefile(Lst_Datum(ln))) 1144 break; 1145 } 1146 if (ln != NULL) 1147 Fatal("make: cannot open %s.", (char *)Lst_Datum(ln)); 1148 } else if (!TryReadMakefile("BSDmakefile")) 1149 if (!TryReadMakefile("makefile")) 1150 TryReadMakefile("Makefile"); 1151 1152 ReadMakefile(".depend"); 1153 1154 /* Install all the flags into the MAKE envariable. */ 1155 if (((p = Var_Value(".MAKEFLAGS", VAR_GLOBAL)) != NULL) && *p) 1156 setenv("MAKEFLAGS", p, 1); 1157 1158 /* 1159 * For compatibility, look at the directories in the VPATH variable 1160 * and add them to the search path, if the variable is defined. The 1161 * variable's value is in the same format as the PATH envariable, i.e. 1162 * <directory>:<directory>:<directory>... 1163 */ 1164 if (Var_Exists("VPATH", VAR_CMD)) { 1165 /* 1166 * GCC stores string constants in read-only memory, but 1167 * Var_Subst will want to write this thing, so store it 1168 * in an array 1169 */ 1170 static char VPATH[] = "${VPATH}"; 1171 Buffer *buf; 1172 char *vpath; 1173 char *ptr; 1174 char savec; 1175 1176 buf = Var_Subst(VPATH, VAR_CMD, FALSE); 1177 1178 vpath = Buf_Data(buf); 1179 do { 1180 /* skip to end of directory */ 1181 for (ptr = vpath; *ptr != ':' && *ptr != '\0'; ptr++) 1182 ; 1183 1184 /* Save terminator character so know when to stop */ 1185 savec = *ptr; 1186 *ptr = '\0'; 1187 1188 /* Add directory to search path */ 1189 Path_AddDir(&dirSearchPath, vpath); 1190 1191 vpath = ptr + 1; 1192 } while (savec != '\0'); 1193 1194 Buf_Destroy(buf, TRUE); 1195 } 1196 1197 /* 1198 * Now that all search paths have been read for suffixes et al, it's 1199 * time to add the default search path to their lists... 1200 */ 1201 Suff_DoPaths(); 1202 1203 /* print the initial graph, if the user requested it */ 1204 if (DEBUG(GRAPH1)) 1205 Targ_PrintGraph(1); 1206 1207 /* print the values of any variables requested by the user */ 1208 if (Lst_IsEmpty(&variables)) { 1209 /* 1210 * Since the user has not requested that any variables 1211 * be printed, we can build targets. 1212 * 1213 * Have read the entire graph and need to make a list of targets 1214 * to create. If none was given on the command line, we consult 1215 * the parsing module to find the main target(s) to create. 1216 */ 1217 Lst targs = Lst_Initializer(targs); 1218 1219 if (!is_posix) { 1220 /* 1221 * Check if any of the makefiles are out-of-date. 1222 */ 1223 Remake_Makefiles(); 1224 } 1225 1226 if (Lst_IsEmpty(&create)) 1227 Parse_MainName(&targs); 1228 else 1229 Targ_FindList(&targs, &create, TARG_CREATE); 1230 1231 if (compatMake) { 1232 /* 1233 * Compat_Init will take care of creating 1234 * all the targets as well as initializing 1235 * the module. 1236 */ 1237 Compat_Run(&targs); 1238 outOfDate = 0; 1239 } else { 1240 /* 1241 * Initialize job module before traversing 1242 * the graph, now that any .BEGIN and .END 1243 * targets have been read. This is done 1244 * only if the -q flag wasn't given (to 1245 * prevent the .BEGIN from being executed 1246 * should it exist). 1247 */ 1248 if (!queryFlag) { 1249 Job_Init(jobLimit); 1250 jobsRunning = TRUE; 1251 } 1252 1253 /* Traverse the graph, checking on all the targets */ 1254 outOfDate = Make_Run(&targs); 1255 } 1256 Lst_Destroy(&targs, NOFREE); 1257 1258 } else { 1259 Var_Print(&variables, expandVars); 1260 } 1261 1262 Lst_Destroy(&variables, free); 1263 Lst_Destroy(&makefiles, free); 1264 Lst_Destroy(&source_makefiles, free); 1265 Lst_Destroy(&create, free); 1266 1267 /* print the graph now it's been processed if the user requested it */ 1268 if (DEBUG(GRAPH2)) 1269 Targ_PrintGraph(2); 1270 1271 if (queryFlag && outOfDate) 1272 return (1); 1273 else 1274 return (0); 1275} 1276 1277