main.c revision 138071
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 138071 2004-11-24 22:03:45Z jmallett $"); 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 Takes a line of arguments, breaks them and 58 * treats them as if they were given when first 59 * invoked. Used by the parse module to implement 60 * the .MFLAGS target. 61 */ 62 63#include <sys/param.h> 64#include <sys/signal.h> 65#include <sys/stat.h> 66#if defined(__i386__) 67#include <sys/sysctl.h> 68#endif 69#include <sys/time.h> 70#include <sys/resource.h> 71#ifndef MACHINE 72#include <sys/utsname.h> 73#endif 74#include <sys/wait.h> 75 76#include <err.h> 77#include <errno.h> 78#include <fcntl.h> 79#include <signal.h> 80#include <stdarg.h> 81#include <stdio.h> 82#include <stdlib.h> 83#include <sysexits.h> 84#include <unistd.h> 85 86#include "make.h" 87#include "hash.h" 88#include "dir.h" 89#include "job.h" 90#include "pathnames.h" 91 92#define WANT_ENV_MKLVL 1 93#define MKLVL_MAXVAL 500 94#define MKLVL_ENVVAR "__MKLVL__" 95 96#define MAKEFLAGS ".MAKEFLAGS" 97 98Lst create; /* Targets to be made */ 99time_t now; /* Time at start of make */ 100GNode *DEFAULT; /* .DEFAULT node */ 101Boolean allPrecious; /* .PRECIOUS given on line by itself */ 102 103static Boolean noBuiltins; /* -r flag */ 104static Lst makefiles; /* ordered list of makefiles to read */ 105static Boolean expandVars; /* fully expand printed variables */ 106static Lst variables; /* list of variables to print */ 107int maxJobs; /* -j argument */ 108static Boolean forceJobs; /* -j argument given */ 109Boolean compatMake; /* -B argument */ 110Boolean debug; /* -d flag */ 111Boolean noExecute; /* -n flag */ 112Boolean keepgoing; /* -k flag */ 113Boolean queryFlag; /* -q flag */ 114Boolean touchFlag; /* -t flag */ 115Boolean usePipes; /* !-P flag */ 116Boolean ignoreErrors; /* -i flag */ 117Boolean beSilent; /* -s flag */ 118Boolean beVerbose; /* -v flag */ 119Boolean oldVars; /* variable substitution style */ 120Boolean checkEnvFirst; /* -e flag */ 121Lst envFirstVars; /* (-E) vars to override from env */ 122Boolean jobsRunning; /* TRUE if the jobs might be running */ 123 124static void MainParseArgs(int, char **); 125char * chdir_verify_path(char *, char *); 126static int ReadMakefile(void *, void *); 127static void usage(void); 128 129static char *curdir; /* startup directory */ 130static char *objdir; /* where we chdir'ed to */ 131 132/* 133 * Append a flag with an optional argument to MAKEFLAGS and MFLAGS 134 */ 135static void 136MFLAGS_append(char *flag, char *arg) 137{ 138 Var_Append(MAKEFLAGS, flag, VAR_GLOBAL); 139 if (arg != NULL) 140 Var_Append(MAKEFLAGS, arg, VAR_GLOBAL); 141 142 Var_Append("MFLAGS", flag, VAR_GLOBAL); 143 if (arg != NULL) 144 Var_Append("MFLAGS", arg, VAR_GLOBAL); 145} 146 147/*- 148 * MainParseArgs -- 149 * Parse a given argument vector. Called from main() and from 150 * Main_ParseArgLine() when the .MAKEFLAGS target is used. 151 * 152 * XXX: Deal with command line overriding .MAKEFLAGS in makefile 153 * 154 * Results: 155 * None 156 * 157 * Side Effects: 158 * Various global and local flags will be set depending on the flags 159 * given 160 */ 161static void 162MainParseArgs(int argc, char **argv) 163{ 164 char *p; 165 int c; 166 167 optind = 1; /* since we're called more than once */ 168#define OPTFLAGS "BC:D:E:I:PSV:Xd:ef:ij:km:nqrstv" 169rearg: while((c = getopt(argc, argv, OPTFLAGS)) != -1) { 170 switch(c) { 171 case 'C': 172 if (chdir(optarg) == -1) 173 err(1, "chdir %s", optarg); 174 break; 175 case 'D': 176 Var_Set(optarg, "1", VAR_GLOBAL); 177 MFLAGS_append("-D", optarg); 178 break; 179 case 'I': 180 Parse_AddIncludeDir(optarg); 181 MFLAGS_append("-I", optarg); 182 break; 183 case 'V': 184 (void)Lst_AtEnd(variables, (void *)optarg); 185 MFLAGS_append("-V", optarg); 186 break; 187 case 'X': 188 expandVars = FALSE; 189 break; 190 case 'B': 191 compatMake = TRUE; 192 MFLAGS_append("-B", NULL); 193 unsetenv("MAKE_JOBS_FIFO"); 194 break; 195 case 'P': 196 usePipes = FALSE; 197 MFLAGS_append("-P", NULL); 198 break; 199 case 'S': 200 keepgoing = FALSE; 201 MFLAGS_append("-S", NULL); 202 break; 203 case 'd': { 204 char *modules = optarg; 205 206 for (; *modules; ++modules) 207 switch (*modules) { 208 case 'A': 209 debug = ~0; 210 break; 211 case 'a': 212 debug |= DEBUG_ARCH; 213 break; 214 case 'c': 215 debug |= DEBUG_COND; 216 break; 217 case 'd': 218 debug |= DEBUG_DIR; 219 break; 220 case 'f': 221 debug |= DEBUG_FOR; 222 break; 223 case 'g': 224 if (modules[1] == '1') { 225 debug |= DEBUG_GRAPH1; 226 ++modules; 227 } 228 else if (modules[1] == '2') { 229 debug |= DEBUG_GRAPH2; 230 ++modules; 231 } 232 break; 233 case 'j': 234 debug |= DEBUG_JOB; 235 break; 236 case 'l': 237 debug |= DEBUG_LOUD; 238 break; 239 case 'm': 240 debug |= DEBUG_MAKE; 241 break; 242 case 's': 243 debug |= DEBUG_SUFF; 244 break; 245 case 't': 246 debug |= DEBUG_TARG; 247 break; 248 case 'v': 249 debug |= DEBUG_VAR; 250 break; 251 default: 252 warnx("illegal argument to d option -- %c", *modules); 253 usage(); 254 } 255 MFLAGS_append("-d", optarg); 256 break; 257 } 258 case 'E': 259 p = emalloc(strlen(optarg) + 1); 260 (void)strcpy(p, optarg); 261 (void)Lst_AtEnd(envFirstVars, (void *)p); 262 MFLAGS_append("-E", optarg); 263 break; 264 case 'e': 265 checkEnvFirst = TRUE; 266 MFLAGS_append("-e", NULL); 267 break; 268 case 'f': 269 (void)Lst_AtEnd(makefiles, (void *)optarg); 270 break; 271 case 'i': 272 ignoreErrors = TRUE; 273 MFLAGS_append("-i", NULL); 274 break; 275 case 'j': { 276 char *endptr; 277 278 forceJobs = TRUE; 279 maxJobs = strtol(optarg, &endptr, 10); 280 if (maxJobs <= 0 || *endptr != '\0') { 281 warnx("illegal number, -j argument -- %s", 282 optarg); 283 usage(); 284 } 285 MFLAGS_append("-j", optarg); 286 break; 287 } 288 case 'k': 289 keepgoing = TRUE; 290 MFLAGS_append("-k", NULL); 291 break; 292 case 'm': 293 Dir_AddDir(sysIncPath, optarg); 294 MFLAGS_append("-m", optarg); 295 break; 296 case 'n': 297 noExecute = TRUE; 298 MFLAGS_append("-n", NULL); 299 break; 300 case 'q': 301 queryFlag = TRUE; 302 /* Kind of nonsensical, wot? */ 303 MFLAGS_append("-q", NULL); 304 break; 305 case 'r': 306 noBuiltins = TRUE; 307 MFLAGS_append("-r", NULL); 308 break; 309 case 's': 310 beSilent = TRUE; 311 MFLAGS_append("-s", NULL); 312 break; 313 case 't': 314 touchFlag = TRUE; 315 MFLAGS_append("-t", NULL); 316 break; 317 case 'v': 318 beVerbose = TRUE; 319 MFLAGS_append("-v", NULL); 320 break; 321 default: 322 case '?': 323 usage(); 324 } 325 } 326 327 oldVars = TRUE; 328 329 /* 330 * See if the rest of the arguments are variable assignments and 331 * perform them if so. Else take them to be targets and stuff them 332 * on the end of the "create" list. 333 */ 334 for (argv += optind, argc -= optind; *argv; ++argv, --argc) 335 if (Parse_IsVar(*argv)) { 336 char *ptr = Var_Quote(*argv); 337 338 Var_Append(MAKEFLAGS, ptr, VAR_GLOBAL); 339 free(ptr); 340 341 Parse_DoVar(*argv, VAR_CMD); 342 } else { 343 if (!**argv) 344 Punt("illegal (null) argument."); 345 if (**argv == '-') { 346 if ((*argv)[1]) 347 optind = 0; /* -flag... */ 348 else 349 optind = 1; /* - */ 350 goto rearg; 351 } 352 (void)Lst_AtEnd(create, (void *)estrdup(*argv)); 353 } 354} 355 356/*- 357 * Main_ParseArgLine -- 358 * Used by the parse module when a .MFLAGS or .MAKEFLAGS target 359 * is encountered and by main() when reading the .MAKEFLAGS envariable. 360 * Takes a line of arguments and breaks it into its 361 * component words and passes those words and the number of them to the 362 * MainParseArgs function. 363 * The line should have all its leading whitespace removed. 364 * 365 * Results: 366 * None 367 * 368 * Side Effects: 369 * Only those that come from the various arguments. 370 */ 371void 372Main_ParseArgLine(char *line) 373{ 374 char **argv; /* Manufactured argument vector */ 375 int argc; /* Number of arguments in argv */ 376 377 if (line == NULL) 378 return; 379 for (; *line == ' '; ++line) 380 continue; 381 if (!*line) 382 return; 383 384 argv = brk_string(line, &argc, TRUE); 385 MainParseArgs(argc, argv); 386} 387 388char * 389chdir_verify_path(char *path, char *obpath) 390{ 391 struct stat sb; 392 393 if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) { 394 if (chdir(path) == -1 || getcwd(obpath, MAXPATHLEN) == NULL) { 395 warn("warning: %s", path); 396 return 0; 397 } 398 return obpath; 399 } 400 401 return 0; 402} 403 404static void 405catch_child(int sig __unused) 406{ 407} 408 409/* 410 * In lieu of a good way to prevent every possible looping in 411 * make(1), stop there from being more than MKLVL_MAXVAL processes forked 412 * by make(1), to prevent a forkbomb from happening, in a dumb and 413 * mechanical way. 414 */ 415static void 416check_make_level(void) 417{ 418#ifdef WANT_ENV_MKLVL 419 char *value = getenv(MKLVL_ENVVAR); 420 int level = (value == NULL) ? 0 : atoi(value); 421 422 if (level < 0) { 423 errc(2, EAGAIN, "Invalid value for recursion level (%d).", level); 424 } else if (level > MKLVL_MAXVAL) { 425 errc(2, EAGAIN, "Max recursion level (%d) exceeded.", MKLVL_MAXVAL); 426 } else { 427 char new_value[32]; 428 sprintf(new_value, "%d", level + 1); 429 setenv(MKLVL_ENVVAR, new_value, 1); 430 } 431#endif /* WANT_ENV_MKLVL */ 432} 433 434/*- 435 * main -- 436 * The main function, for obvious reasons. Initializes variables 437 * and a few modules, then parses the arguments give it in the 438 * environment and on the command line. Reads the system makefile 439 * followed by either Makefile, makefile or the file given by the 440 * -f argument. Sets the .MAKEFLAGS PMake variable based on all the 441 * flags it has received by then uses either the Make or the Compat 442 * module to create the initial list of targets. 443 * 444 * Results: 445 * If -q was given, exits -1 if anything was out-of-date. Else it exits 446 * 0. 447 * 448 * Side Effects: 449 * The program exits when done. Targets are created. etc. etc. etc. 450 */ 451int 452main(int argc, char **argv) 453{ 454 Lst targs; /* target nodes to create -- passed to Make_Init */ 455 Boolean outOfDate = TRUE; /* FALSE if all targets up to date */ 456 struct stat sa; 457 char *p, *p1, *path, *pathp; 458 char mdpath[MAXPATHLEN]; 459 char obpath[MAXPATHLEN]; 460 char cdpath[MAXPATHLEN]; 461 char *machine = getenv("MACHINE"); 462 char *machine_arch = getenv("MACHINE_ARCH"); 463 char *machine_cpu = getenv("MACHINE_CPU"); 464 Lst sysMkPath; /* Path of sys.mk */ 465 char *cp = NULL, *start; 466 /* avoid faults on read-only strings */ 467 static char syspath[] = _PATH_DEFSYSPATH; 468 469 { 470 /* 471 * Catch SIGCHLD so that we get kicked out of select() when we 472 * need to look at a child. This is only known to matter for the 473 * -j case (perhaps without -P). 474 * 475 * XXX this is intentionally misplaced. 476 */ 477 struct sigaction sa; 478 479 sigemptyset(&sa.sa_mask); 480 sa.sa_flags = SA_RESTART | SA_NOCLDSTOP; 481 sa.sa_handler = catch_child; 482 sigaction(SIGCHLD, &sa, NULL); 483 } 484 485 check_make_level(); 486 487#if DEFSHELL == 2 488 /* 489 * Turn off ENV to make ksh happier. 490 */ 491 unsetenv("ENV"); 492#endif 493 494#ifdef RLIMIT_NOFILE 495 /* 496 * get rid of resource limit on file descriptors 497 */ 498 { 499 struct rlimit rl; 500 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 && 501 rl.rlim_cur != rl.rlim_max) { 502 rl.rlim_cur = rl.rlim_max; 503 (void) setrlimit(RLIMIT_NOFILE, &rl); 504 } 505 } 506#endif 507 508 /* 509 * PC-98 kernel sets the `i386' string to the utsname.machine and 510 * it cannot be distinguished from IBM-PC by uname(3). Therefore, 511 * we check machine.ispc98 and adjust the machine variable before 512 * using usname(3) below. 513 * NOTE: machdep.ispc98 was defined on 1998/8/31. At that time, 514 * __FreeBSD_version was defined as 300003. So, this check can 515 * safely be done with any kernel with version > 300003. 516 */ 517 if (!machine) { 518 int ispc98; 519 size_t len; 520 521 len = sizeof(ispc98); 522 if (!sysctlbyname("machdep.ispc98", &ispc98, &len, NULL, 0)) { 523 if (ispc98) 524 machine = "pc98"; 525 } 526 } 527 528 /* 529 * Get the name of this type of MACHINE from utsname 530 * so we can share an executable for similar machines. 531 * (i.e. m68k: amiga hp300, mac68k, sun3, ...) 532 * 533 * Note that while MACHINE is decided at run-time, 534 * MACHINE_ARCH is always known at compile time. 535 */ 536 if (!machine) { 537#ifndef MACHINE 538 struct utsname utsname; 539 540 if (uname(&utsname) == -1) 541 err(2, "uname"); 542 machine = utsname.machine; 543#else 544 machine = MACHINE; 545#endif 546 } 547 548 if (!machine_arch) { 549#ifndef MACHINE_ARCH 550 machine_arch = "unknown"; 551#else 552 machine_arch = MACHINE_ARCH; 553#endif 554 } 555 556 /* 557 * Set machine_cpu to the minumum supported CPU revision based 558 * on the target architecture, if not already set. 559 */ 560 if (!machine_cpu) { 561 if (!strcmp(machine_arch, "i386")) 562 machine_cpu = "i386"; 563 else if (!strcmp(machine_arch, "alpha")) 564 machine_cpu = "ev4"; 565 else 566 machine_cpu = "unknown"; 567 } 568 569 create = Lst_Init(FALSE); 570 makefiles = Lst_Init(FALSE); 571 envFirstVars = Lst_Init(FALSE); 572 expandVars = TRUE; 573 variables = Lst_Init(FALSE); 574 beSilent = FALSE; /* Print commands as executed */ 575 ignoreErrors = FALSE; /* Pay attention to non-zero returns */ 576 noExecute = FALSE; /* Execute all commands */ 577 keepgoing = FALSE; /* Stop on error */ 578 allPrecious = FALSE; /* Remove targets when interrupted */ 579 queryFlag = FALSE; /* This is not just a check-run */ 580 noBuiltins = FALSE; /* Read the built-in rules */ 581 touchFlag = FALSE; /* Actually update targets */ 582 usePipes = TRUE; /* Catch child output in pipes */ 583 debug = 0; /* No debug verbosity, please. */ 584 jobsRunning = FALSE; 585 586 maxJobs = DEFMAXJOBS; 587 forceJobs = FALSE; /* No -j flag */ 588 compatMake = FALSE; /* No compat mode */ 589 590 591 /* 592 * Initialize the parsing, directory and variable modules to prepare 593 * for the reading of inclusion paths and variable settings on the 594 * command line 595 */ 596 Dir_Init(); /* Initialize directory structures so -I flags 597 * can be processed correctly */ 598 Parse_Init(); /* Need to initialize the paths of #include 599 * directories */ 600 Var_Init(); /* As well as the lists of variables for 601 * parsing arguments */ 602 str_init(); 603 604 /* 605 * Initialize various variables. 606 * MAKE also gets this name, for compatibility 607 * .MAKEFLAGS gets set to the empty string just in case. 608 * MFLAGS also gets initialized empty, for compatibility. 609 */ 610 Var_Set("MAKE", argv[0], VAR_GLOBAL); 611 Var_Set(MAKEFLAGS, "", VAR_GLOBAL); 612 Var_Set("MFLAGS", "", VAR_GLOBAL); 613 Var_Set("MACHINE", machine, VAR_GLOBAL); 614 Var_Set("MACHINE_ARCH", machine_arch, VAR_GLOBAL); 615 Var_Set("MACHINE_CPU", machine_cpu, VAR_GLOBAL); 616#ifdef MAKE_VERSION 617 Var_Set("MAKE_VERSION", MAKE_VERSION, VAR_GLOBAL); 618#endif 619 620 /* 621 * First snag any flags out of the MAKE environment variable. 622 * (Note this is *not* MAKEFLAGS since /bin/make uses that and it's 623 * in a different format). 624 */ 625 Main_ParseArgLine(getenv("MAKEFLAGS")); 626 627 MainParseArgs(argc, argv); 628 629 /* 630 * Find where we are... 631 * All this code is so that we know where we are when we start up 632 * on a different machine with pmake. 633 */ 634 curdir = cdpath; 635 if (getcwd(curdir, MAXPATHLEN) == NULL) 636 err(2, NULL); 637 638 if (stat(curdir, &sa) == -1) 639 err(2, "%s", curdir); 640 641 /* 642 * The object directory location is determined using the 643 * following order of preference: 644 * 645 * 1. MAKEOBJDIRPREFIX`cwd` 646 * 2. MAKEOBJDIR 647 * 3. _PATH_OBJDIR.${MACHINE} 648 * 4. _PATH_OBJDIR 649 * 5. _PATH_OBJDIRPREFIX`cwd` 650 * 651 * If one of the first two fails, use the current directory. 652 * If the remaining three all fail, use the current directory. 653 * 654 * Once things are initted, 655 * have to add the original directory to the search path, 656 * and modify the paths for the Makefiles apropriately. The 657 * current directory is also placed as a variable for make scripts. 658 */ 659 if (!(pathp = getenv("MAKEOBJDIRPREFIX"))) { 660 if (!(path = getenv("MAKEOBJDIR"))) { 661 path = _PATH_OBJDIR; 662 pathp = _PATH_OBJDIRPREFIX; 663 (void) snprintf(mdpath, MAXPATHLEN, "%s.%s", 664 path, machine); 665 if (!(objdir = chdir_verify_path(mdpath, obpath))) 666 if (!(objdir=chdir_verify_path(path, obpath))) { 667 (void) snprintf(mdpath, MAXPATHLEN, 668 "%s%s", pathp, curdir); 669 if (!(objdir=chdir_verify_path(mdpath, 670 obpath))) 671 objdir = curdir; 672 } 673 } 674 else if (!(objdir = chdir_verify_path(path, obpath))) 675 objdir = curdir; 676 } 677 else { 678 (void) snprintf(mdpath, MAXPATHLEN, "%s%s", pathp, curdir); 679 if (!(objdir = chdir_verify_path(mdpath, obpath))) 680 objdir = curdir; 681 } 682 Dir_InitDot(); /* Initialize the "." directory */ 683 if (objdir != curdir) 684 Dir_AddDir(dirSearchPath, curdir); 685 Var_Set(".CURDIR", curdir, VAR_GLOBAL); 686 Var_Set(".OBJDIR", objdir, VAR_GLOBAL); 687 688 if (getenv("MAKE_JOBS_FIFO") != NULL) 689 forceJobs = TRUE; 690 /* 691 * Be compatible if user did not specify -j and did not explicitly 692 * turned compatibility on 693 */ 694 if (!compatMake && !forceJobs) 695 compatMake = TRUE; 696 697 /* 698 * Initialize archive, target and suffix modules in preparation for 699 * parsing the makefile(s) 700 */ 701 Arch_Init(); 702 Targ_Init(); 703 Suff_Init(); 704 705 DEFAULT = NULL; 706 (void)time(&now); 707 708 /* 709 * Set up the .TARGETS variable to contain the list of targets to be 710 * created. If none specified, make the variable empty -- the parser 711 * will fill the thing in with the default or .MAIN target. 712 */ 713 if (!Lst_IsEmpty(create)) { 714 LstNode ln; 715 716 for (ln = Lst_First(create); ln != NULL; 717 ln = Lst_Succ(ln)) { 718 char *name = (char *)Lst_Datum(ln); 719 720 Var_Append(".TARGETS", name, VAR_GLOBAL); 721 } 722 } else 723 Var_Set(".TARGETS", "", VAR_GLOBAL); 724 725 726 /* 727 * If no user-supplied system path was given (through the -m option) 728 * add the directories from the DEFSYSPATH (more than one may be given 729 * as dir1:...:dirn) to the system include path. 730 */ 731 if (Lst_IsEmpty(sysIncPath)) { 732 for (start = syspath; *start != '\0'; start = cp) { 733 for (cp = start; *cp != '\0' && *cp != ':'; cp++) 734 continue; 735 if (*cp == '\0') { 736 Dir_AddDir(sysIncPath, start); 737 } else { 738 *cp++ = '\0'; 739 Dir_AddDir(sysIncPath, start); 740 } 741 } 742 } 743 744 /* 745 * Read in the built-in rules first, followed by the specified 746 * makefile, if it was (makefile != (char *) NULL), or the default 747 * Makefile and makefile, in that order, if it wasn't. 748 */ 749 if (!noBuiltins) { 750 LstNode ln; 751 752 sysMkPath = Lst_Init (FALSE); 753 Dir_Expand (_PATH_DEFSYSMK, sysIncPath, sysMkPath); 754 if (Lst_IsEmpty(sysMkPath)) 755 Fatal("make: no system rules (%s).", _PATH_DEFSYSMK); 756 ln = Lst_Find(sysMkPath, (void *)NULL, ReadMakefile); 757 if (ln != NULL) 758 Fatal("make: cannot open %s.", (char *)Lst_Datum(ln)); 759 } 760 761 if (!Lst_IsEmpty(makefiles)) { 762 LstNode ln; 763 764 ln = Lst_Find(makefiles, (void *)NULL, ReadMakefile); 765 if (ln != NULL) 766 Fatal("make: cannot open %s.", (char *)Lst_Datum(ln)); 767 } else if (!ReadMakefile("BSDmakefile", NULL)) 768 if (!ReadMakefile("makefile", NULL)) 769 (void)ReadMakefile("Makefile", NULL); 770 771 (void)ReadMakefile(".depend", NULL); 772 773 /* Install all the flags into the MAKE envariable. */ 774 if (((p = Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1)) != NULL) && *p) 775 setenv("MAKEFLAGS", p, 1); 776 free(p1); 777 778 /* 779 * For compatibility, look at the directories in the VPATH variable 780 * and add them to the search path, if the variable is defined. The 781 * variable's value is in the same format as the PATH envariable, i.e. 782 * <directory>:<directory>:<directory>... 783 */ 784 if (Var_Exists("VPATH", VAR_CMD)) { 785 char *vpath, savec; 786 /* 787 * GCC stores string constants in read-only memory, but 788 * Var_Subst will want to write this thing, so store it 789 * in an array 790 */ 791 static char VPATH[] = "${VPATH}"; 792 793 vpath = Var_Subst(NULL, VPATH, VAR_CMD, FALSE); 794 path = vpath; 795 do { 796 /* skip to end of directory */ 797 for (cp = path; *cp != ':' && *cp != '\0'; cp++) 798 continue; 799 /* Save terminator character so know when to stop */ 800 savec = *cp; 801 *cp = '\0'; 802 /* Add directory to search path */ 803 Dir_AddDir(dirSearchPath, path); 804 *cp = savec; 805 path = cp + 1; 806 } while (savec == ':'); 807 (void)free(vpath); 808 } 809 810 /* 811 * Now that all search paths have been read for suffixes et al, it's 812 * time to add the default search path to their lists... 813 */ 814 Suff_DoPaths(); 815 816 /* print the initial graph, if the user requested it */ 817 if (DEBUG(GRAPH1)) 818 Targ_PrintGraph(1); 819 820 /* print the values of any variables requested by the user */ 821 if (!Lst_IsEmpty(variables)) { 822 LstNode ln; 823 824 for (ln = Lst_First(variables); ln != NULL; 825 ln = Lst_Succ(ln)) { 826 char *value; 827 if (expandVars) { 828 p1 = emalloc(strlen((char *)Lst_Datum(ln)) + 1 + 3); 829 /* This sprintf is safe, because of the malloc above */ 830 (void)sprintf(p1, "${%s}", (char *)Lst_Datum(ln)); 831 value = Var_Subst(NULL, p1, VAR_GLOBAL, FALSE); 832 } else { 833 value = Var_Value((char *)Lst_Datum(ln), 834 VAR_GLOBAL, &p1); 835 } 836 printf("%s\n", value ? value : ""); 837 if (p1) 838 free(p1); 839 } 840 } else { 841 842 /* 843 * Have now read the entire graph and need to make a list of targets 844 * to create. If none was given on the command line, we consult the 845 * parsing module to find the main target(s) to create. 846 */ 847 if (Lst_IsEmpty(create)) 848 targs = Parse_MainName(); 849 else 850 targs = Targ_FindList(create, TARG_CREATE); 851 852 if (!compatMake) { 853 /* 854 * Initialize job module before traversing the graph, now that 855 * any .BEGIN and .END targets have been read. This is done 856 * only if the -q flag wasn't given (to prevent the .BEGIN from 857 * being executed should it exist). 858 */ 859 if (!queryFlag) { 860 Job_Init(maxJobs); 861 jobsRunning = TRUE; 862 } 863 864 /* Traverse the graph, checking on all the targets */ 865 outOfDate = Make_Run(targs); 866 } else { 867 /* 868 * Compat_Init will take care of creating all the targets as 869 * well as initializing the module. 870 */ 871 Compat_Run(targs); 872 outOfDate = 0; 873 } 874 Lst_Destroy(targs, NOFREE); 875 } 876 877 Lst_Destroy(variables, NOFREE); 878 Lst_Destroy(makefiles, NOFREE); 879 Lst_Destroy(create, (void (*)(void *)) free); 880 881 /* print the graph now it's been processed if the user requested it */ 882 if (DEBUG(GRAPH2)) 883 Targ_PrintGraph(2); 884 885 Suff_End(); 886 Targ_End(); 887 Arch_End(); 888 str_end(); 889 Var_End(); 890 Parse_End(); 891 Dir_End(); 892 893 if (queryFlag && outOfDate) 894 return(1); 895 else 896 return(0); 897} 898 899/*- 900 * ReadMakefile -- 901 * Open and parse the given makefile. 902 * 903 * Results: 904 * TRUE if ok. FALSE if couldn't open file. 905 * 906 * Side Effects: 907 * lots 908 */ 909static Boolean 910ReadMakefile(void *p, void *q __unused) 911{ 912 char *fname; /* makefile to read */ 913 FILE *stream; 914 char *name, path[MAXPATHLEN]; 915 char *MAKEFILE; 916 int setMAKEFILE; 917 918 fname = p; 919 920 if (!strcmp(fname, "-")) { 921 Parse_File("(stdin)", stdin); 922 Var_Set("MAKEFILE", "", VAR_GLOBAL); 923 } else { 924 setMAKEFILE = strcmp(fname, ".depend"); 925 926 /* if we've chdir'd, rebuild the path name */ 927 if (curdir != objdir && *fname != '/') { 928 (void)snprintf(path, MAXPATHLEN, "%s/%s", curdir, fname); 929 /* 930 * XXX The realpath stuff breaks relative includes 931 * XXX in some cases. The problem likely is in 932 * XXX parse.c where it does special things in 933 * XXX ParseDoInclude if the file is relateive 934 * XXX or absolute and not a system file. There 935 * XXX it assumes that if the current file that's 936 * XXX being included is absolute, that any files 937 * XXX that it includes shouldn't do the -I path 938 * XXX stuff, which is inconsistant with historical 939 * XXX behavior. However, I can't pentrate the mists 940 * XXX further, so I'm putting this workaround in 941 * XXX here until such time as the underlying bug 942 * XXX can be fixed. 943 */ 944#if THIS_BREAKS_THINGS 945 if (realpath(path, path) != NULL && 946 (stream = fopen(path, "r")) != NULL) { 947 MAKEFILE = fname; 948 fname = path; 949 goto found; 950 } 951 } else if (realpath(fname, path) != NULL) { 952 MAKEFILE = fname; 953 fname = path; 954 if ((stream = fopen(fname, "r")) != NULL) 955 goto found; 956 } 957#else 958 if ((stream = fopen(path, "r")) != NULL) { 959 MAKEFILE = fname; 960 fname = path; 961 goto found; 962 } 963 } else { 964 MAKEFILE = fname; 965 if ((stream = fopen(fname, "r")) != NULL) 966 goto found; 967 } 968#endif 969 /* look in -I and system include directories. */ 970 name = Dir_FindFile(fname, parseIncPath); 971 if (!name) 972 name = Dir_FindFile(fname, sysIncPath); 973 if (!name || !(stream = fopen(name, "r"))) 974 return(FALSE); 975 MAKEFILE = fname = name; 976 /* 977 * set the MAKEFILE variable desired by System V fans -- the 978 * placement of the setting here means it gets set to the last 979 * makefile specified, as it is set by SysV make. 980 */ 981found: 982 if (setMAKEFILE) 983 Var_Set("MAKEFILE", MAKEFILE, VAR_GLOBAL); 984 Parse_File(fname, stream); 985 (void)fclose(stream); 986 } 987 return(TRUE); 988} 989 990/*- 991 * Cmd_Exec -- 992 * Execute the command in cmd, and return the output of that command 993 * in a string. 994 * 995 * Results: 996 * A string containing the output of the command, or the empty string 997 * If error is not NULL, it contains the reason for the command failure 998 * 999 * Side Effects: 1000 * The string must be freed by the caller. 1001 */ 1002char * 1003Cmd_Exec(char *cmd, char **error) 1004{ 1005 char *args[4]; /* Args for invoking the shell */ 1006 int fds[2]; /* Pipe streams */ 1007 int cpid; /* Child PID */ 1008 int pid; /* PID from wait() */ 1009 char *res; /* result */ 1010 int status; /* command exit status */ 1011 Buffer buf; /* buffer to store the result */ 1012 char *cp; 1013 int cc; 1014 1015 *error = NULL; 1016 1017 if (shellPath == NULL) 1018 Shell_Init(); 1019 /* 1020 * Set up arguments for shell 1021 */ 1022 args[0] = shellName; 1023 args[1] = "-c"; 1024 args[2] = cmd; 1025 args[3] = NULL; 1026 1027 /* 1028 * Open a pipe for fetching its output 1029 */ 1030 if (pipe(fds) == -1) { 1031 *error = "Couldn't create pipe for \"%s\""; 1032 goto bad; 1033 } 1034 1035 /* 1036 * Fork 1037 */ 1038 switch (cpid = vfork()) { 1039 case 0: 1040 /* 1041 * Close input side of pipe 1042 */ 1043 (void) close(fds[0]); 1044 1045 /* 1046 * Duplicate the output stream to the shell's output, then 1047 * shut the extra thing down. Note we don't fetch the error 1048 * stream...why not? Why? 1049 */ 1050 (void) dup2(fds[1], 1); 1051 (void) close(fds[1]); 1052 1053 (void) execv(shellPath, args); 1054 _exit(1); 1055 /*NOTREACHED*/ 1056 1057 case -1: 1058 *error = "Couldn't exec \"%s\""; 1059 goto bad; 1060 1061 default: 1062 /* 1063 * No need for the writing half 1064 */ 1065 (void) close(fds[1]); 1066 1067 buf = Buf_Init (MAKE_BSIZE); 1068 1069 do { 1070 char result[BUFSIZ]; 1071 cc = read(fds[0], result, sizeof(result)); 1072 if (cc > 0) 1073 Buf_AddBytes(buf, cc, (Byte *) result); 1074 } 1075 while (cc > 0 || (cc == -1 && errno == EINTR)); 1076 1077 /* 1078 * Close the input side of the pipe. 1079 */ 1080 (void) close(fds[0]); 1081 1082 /* 1083 * Wait for the process to exit. 1084 */ 1085 while(((pid = wait(&status)) != cpid) && (pid >= 0)) 1086 continue; 1087 1088 if (cc == -1) 1089 *error = "Error reading shell's output for \"%s\""; 1090 1091 res = (char *)Buf_GetAll (buf, &cc); 1092 Buf_Destroy (buf, FALSE); 1093 1094 if (status) 1095 *error = "\"%s\" returned non-zero status"; 1096 1097 /* 1098 * Null-terminate the result, convert newlines to spaces and 1099 * install it in the variable. 1100 */ 1101 res[cc] = '\0'; 1102 cp = &res[cc] - 1; 1103 1104 if (*cp == '\n') { 1105 /* 1106 * A final newline is just stripped 1107 */ 1108 *cp-- = '\0'; 1109 } 1110 while (cp >= res) { 1111 if (*cp == '\n') { 1112 *cp = ' '; 1113 } 1114 cp--; 1115 } 1116 break; 1117 } 1118 return res; 1119bad: 1120 res = emalloc(1); 1121 *res = '\0'; 1122 return res; 1123} 1124 1125/* 1126 * usage -- 1127 * exit with usage message 1128 */ 1129static void 1130usage(void) 1131{ 1132 (void)fprintf(stderr, "%s\n%s\n%s\n", 1133"usage: make [-BPSXeiknqrstv] [-C directory] [-D variable] [-d flags]", 1134" [-E variable] [-f makefile] [-I directory] [-j max_jobs]", 1135" [-m directory] [-V variable] [variable=value] [target ...]"); 1136 exit(2); 1137} 1138