main.c revision 137810
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 137810 2004-11-17 11:32:46Z harti $"); 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 94#define MAKEFLAGS ".MAKEFLAGS" 95 96Lst create; /* Targets to be made */ 97time_t now; /* Time at start of make */ 98GNode *DEFAULT; /* .DEFAULT node */ 99Boolean allPrecious; /* .PRECIOUS given on line by itself */ 100 101static Boolean noBuiltins; /* -r flag */ 102static Lst makefiles; /* ordered list of makefiles to read */ 103static Boolean expandVars; /* fully expand printed variables */ 104static Lst variables; /* list of variables to print */ 105int maxJobs; /* -j argument */ 106static Boolean forceJobs; /* -j argument given */ 107Boolean compatMake; /* -B argument */ 108Boolean debug; /* -d flag */ 109Boolean noExecute; /* -n flag */ 110Boolean keepgoing; /* -k flag */ 111Boolean queryFlag; /* -q flag */ 112Boolean touchFlag; /* -t flag */ 113Boolean usePipes; /* !-P flag */ 114Boolean ignoreErrors; /* -i flag */ 115Boolean beSilent; /* -s flag */ 116Boolean beVerbose; /* -v flag */ 117Boolean oldVars; /* variable substitution style */ 118Boolean checkEnvFirst; /* -e flag */ 119Lst envFirstVars; /* (-E) vars to override from env */ 120Boolean jobsRunning; /* TRUE if the jobs might be running */ 121 122static void MainParseArgs(int, char **); 123char * chdir_verify_path(char *, char *); 124static int ReadMakefile(void *, void *); 125static void usage(void); 126 127static char *curdir; /* startup directory */ 128static char *objdir; /* where we chdir'ed to */ 129 130/* 131 * Append a flag with an optional argument to MAKEFLAGS and MFLAGS 132 */ 133static void 134MFLAGS_append(char *flag, char *arg) 135{ 136 Var_Append(MAKEFLAGS, flag, VAR_GLOBAL); 137 if (arg != NULL) 138 Var_Append(MAKEFLAGS, arg, VAR_GLOBAL); 139 140 Var_Append("MFLAGS", flag, VAR_GLOBAL); 141 if (arg != NULL) 142 Var_Append("MFLAGS", arg, VAR_GLOBAL); 143} 144 145/*- 146 * MainParseArgs -- 147 * Parse a given argument vector. Called from main() and from 148 * Main_ParseArgLine() when the .MAKEFLAGS target is used. 149 * 150 * XXX: Deal with command line overriding .MAKEFLAGS in makefile 151 * 152 * Results: 153 * None 154 * 155 * Side Effects: 156 * Various global and local flags will be set depending on the flags 157 * given 158 */ 159static void 160MainParseArgs(int argc, char **argv) 161{ 162 char *p; 163 int c; 164 165 optind = 1; /* since we're called more than once */ 166#define OPTFLAGS "BC:D:E:I:PSV:Xd:ef:ij:km:nqrstv" 167rearg: while((c = getopt(argc, argv, OPTFLAGS)) != -1) { 168 switch(c) { 169 case 'C': 170 if (chdir(optarg) == -1) 171 err(1, "chdir %s", optarg); 172 break; 173 case 'D': 174 Var_Set(optarg, "1", VAR_GLOBAL); 175 MFLAGS_append("-D", optarg); 176 break; 177 case 'I': 178 Parse_AddIncludeDir(optarg); 179 MFLAGS_append("-I", optarg); 180 break; 181 case 'V': 182 (void)Lst_AtEnd(variables, (void *)optarg); 183 MFLAGS_append("-V", optarg); 184 break; 185 case 'X': 186 expandVars = FALSE; 187 break; 188 case 'B': 189 compatMake = TRUE; 190 MFLAGS_append("-B", NULL); 191 unsetenv("MAKE_JOBS_FIFO"); 192 break; 193 case 'P': 194 usePipes = FALSE; 195 MFLAGS_append("-P", NULL); 196 break; 197 case 'S': 198 keepgoing = FALSE; 199 MFLAGS_append("-S", NULL); 200 break; 201 case 'd': { 202 char *modules = optarg; 203 204 for (; *modules; ++modules) 205 switch (*modules) { 206 case 'A': 207 debug = ~0; 208 break; 209 case 'a': 210 debug |= DEBUG_ARCH; 211 break; 212 case 'c': 213 debug |= DEBUG_COND; 214 break; 215 case 'd': 216 debug |= DEBUG_DIR; 217 break; 218 case 'f': 219 debug |= DEBUG_FOR; 220 break; 221 case 'g': 222 if (modules[1] == '1') { 223 debug |= DEBUG_GRAPH1; 224 ++modules; 225 } 226 else if (modules[1] == '2') { 227 debug |= DEBUG_GRAPH2; 228 ++modules; 229 } 230 break; 231 case 'j': 232 debug |= DEBUG_JOB; 233 break; 234 case 'l': 235 debug |= DEBUG_LOUD; 236 break; 237 case 'm': 238 debug |= DEBUG_MAKE; 239 break; 240 case 's': 241 debug |= DEBUG_SUFF; 242 break; 243 case 't': 244 debug |= DEBUG_TARG; 245 break; 246 case 'v': 247 debug |= DEBUG_VAR; 248 break; 249 default: 250 warnx("illegal argument to d option -- %c", *modules); 251 usage(); 252 } 253 MFLAGS_append("-d", optarg); 254 break; 255 } 256 case 'E': 257 p = emalloc(strlen(optarg) + 1); 258 (void)strcpy(p, optarg); 259 (void)Lst_AtEnd(envFirstVars, (void *)p); 260 MFLAGS_append("-E", optarg); 261 break; 262 case 'e': 263 checkEnvFirst = TRUE; 264 MFLAGS_append("-e", NULL); 265 break; 266 case 'f': 267 (void)Lst_AtEnd(makefiles, (void *)optarg); 268 break; 269 case 'i': 270 ignoreErrors = TRUE; 271 MFLAGS_append("-i", NULL); 272 break; 273 case 'j': { 274 char *endptr; 275 276 forceJobs = TRUE; 277 maxJobs = strtol(optarg, &endptr, 10); 278 if (maxJobs <= 0 || *endptr != '\0') { 279 warnx("illegal number, -j argument -- %s", 280 optarg); 281 usage(); 282 } 283 MFLAGS_append("-j", optarg); 284 break; 285 } 286 case 'k': 287 keepgoing = TRUE; 288 MFLAGS_append("-k", NULL); 289 break; 290 case 'm': 291 Dir_AddDir(sysIncPath, optarg); 292 MFLAGS_append("-m", optarg); 293 break; 294 case 'n': 295 noExecute = TRUE; 296 MFLAGS_append("-n", NULL); 297 break; 298 case 'q': 299 queryFlag = TRUE; 300 /* Kind of nonsensical, wot? */ 301 MFLAGS_append("-q", NULL); 302 break; 303 case 'r': 304 noBuiltins = TRUE; 305 MFLAGS_append("-r", NULL); 306 break; 307 case 's': 308 beSilent = TRUE; 309 MFLAGS_append("-s", NULL); 310 break; 311 case 't': 312 touchFlag = TRUE; 313 MFLAGS_append("-t", NULL); 314 break; 315 case 'v': 316 beVerbose = TRUE; 317 MFLAGS_append("-v", NULL); 318 break; 319 default: 320 case '?': 321 usage(); 322 } 323 } 324 325 oldVars = TRUE; 326 327 /* 328 * See if the rest of the arguments are variable assignments and 329 * perform them if so. Else take them to be targets and stuff them 330 * on the end of the "create" list. 331 */ 332 for (argv += optind, argc -= optind; *argv; ++argv, --argc) 333 if (Parse_IsVar(*argv)) { 334 char *ptr = Var_Quote(*argv); 335 336 Var_Append(MAKEFLAGS, ptr, VAR_GLOBAL); 337 free(ptr); 338 339 Parse_DoVar(*argv, VAR_CMD); 340 } else { 341 if (!**argv) 342 Punt("illegal (null) argument."); 343 if (**argv == '-') { 344 if ((*argv)[1]) 345 optind = 0; /* -flag... */ 346 else 347 optind = 1; /* - */ 348 goto rearg; 349 } 350 (void)Lst_AtEnd(create, (void *)estrdup(*argv)); 351 } 352} 353 354/*- 355 * Main_ParseArgLine -- 356 * Used by the parse module when a .MFLAGS or .MAKEFLAGS target 357 * is encountered and by main() when reading the .MAKEFLAGS envariable. 358 * Takes a line of arguments and breaks it into its 359 * component words and passes those words and the number of them to the 360 * MainParseArgs function. 361 * The line should have all its leading whitespace removed. 362 * 363 * Results: 364 * None 365 * 366 * Side Effects: 367 * Only those that come from the various arguments. 368 */ 369void 370Main_ParseArgLine(char *line) 371{ 372 char **argv; /* Manufactured argument vector */ 373 int argc; /* Number of arguments in argv */ 374 375 if (line == NULL) 376 return; 377 for (; *line == ' '; ++line) 378 continue; 379 if (!*line) 380 return; 381 382 argv = brk_string(line, &argc, TRUE); 383 MainParseArgs(argc, argv); 384} 385 386char * 387chdir_verify_path(char *path, char *obpath) 388{ 389 struct stat sb; 390 391 if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) { 392 if (chdir(path) == -1 || getcwd(obpath, MAXPATHLEN) == NULL) { 393 warn("warning: %s", path); 394 return 0; 395 } 396 return obpath; 397 } 398 399 return 0; 400} 401 402static void 403catch_child(int sig __unused) 404{ 405} 406 407/*- 408 * main -- 409 * The main function, for obvious reasons. Initializes variables 410 * and a few modules, then parses the arguments give it in the 411 * environment and on the command line. Reads the system makefile 412 * followed by either Makefile, makefile or the file given by the 413 * -f argument. Sets the .MAKEFLAGS PMake variable based on all the 414 * flags it has received by then uses either the Make or the Compat 415 * module to create the initial list of targets. 416 * 417 * Results: 418 * If -q was given, exits -1 if anything was out-of-date. Else it exits 419 * 0. 420 * 421 * Side Effects: 422 * The program exits when done. Targets are created. etc. etc. etc. 423 */ 424int 425main(int argc, char **argv) 426{ 427 Lst targs; /* target nodes to create -- passed to Make_Init */ 428 Boolean outOfDate = TRUE; /* FALSE if all targets up to date */ 429 struct stat sa; 430 char *p, *p1, *path, *pathp; 431#ifdef WANT_ENV_MKLVL 432#define MKLVL_MAXVAL 500 433#define MKLVL_ENVVAR "__MKLVL__" 434 int iMkLvl = 0; 435 char *szMkLvl = getenv(MKLVL_ENVVAR); 436#endif /* WANT_ENV_MKLVL */ 437 char mdpath[MAXPATHLEN]; 438 char obpath[MAXPATHLEN]; 439 char cdpath[MAXPATHLEN]; 440 char *machine = getenv("MACHINE"); 441 char *machine_arch = getenv("MACHINE_ARCH"); 442 char *machine_cpu = getenv("MACHINE_CPU"); 443 Lst sysMkPath; /* Path of sys.mk */ 444 char *cp = NULL, *start; 445 /* avoid faults on read-only strings */ 446 static char syspath[] = _PATH_DEFSYSPATH; 447 448 { 449 /* 450 * Catch SIGCHLD so that we get kicked out of select() when we 451 * need to look at a child. This is only known to matter for the 452 * -j case (perhaps without -P). 453 * 454 * XXX this is intentionally misplaced. 455 */ 456 struct sigaction sa; 457 458 sigemptyset(&sa.sa_mask); 459 sa.sa_flags = SA_RESTART | SA_NOCLDSTOP; 460 sa.sa_handler = catch_child; 461 sigaction(SIGCHLD, &sa, NULL); 462 } 463 464#ifdef WANT_ENV_MKLVL 465 if ((iMkLvl = szMkLvl ? atoi(szMkLvl) : 0) < 0) { 466 iMkLvl = 0; 467 } 468 if (iMkLvl++ > MKLVL_MAXVAL) { 469 errc(2, EAGAIN, 470 "Max recursion level (%d) exceeded.", MKLVL_MAXVAL); 471 } 472 bzero(szMkLvl = emalloc(32), 32); 473 sprintf(szMkLvl, "%d", iMkLvl); 474 setenv(MKLVL_ENVVAR, szMkLvl, 1); 475#endif /* WANT_ENV_MKLVL */ 476 477#if DEFSHELL == 2 478 /* 479 * Turn off ENV to make ksh happier. 480 */ 481 unsetenv("ENV"); 482#endif 483 484#ifdef RLIMIT_NOFILE 485 /* 486 * get rid of resource limit on file descriptors 487 */ 488 { 489 struct rlimit rl; 490 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 && 491 rl.rlim_cur != rl.rlim_max) { 492 rl.rlim_cur = rl.rlim_max; 493 (void) setrlimit(RLIMIT_NOFILE, &rl); 494 } 495 } 496#endif 497 498 /* 499 * PC-98 kernel sets the `i386' string to the utsname.machine and 500 * it cannot be distinguished from IBM-PC by uname(3). Therefore, 501 * we check machine.ispc98 and adjust the machine variable before 502 * using usname(3) below. 503 * NOTE: machdep.ispc98 was defined on 1998/8/31. At that time, 504 * __FreeBSD_version was defined as 300003. So, this check can 505 * safely be done with any kernel with version > 300003. 506 */ 507 if (!machine) { 508 int ispc98; 509 size_t len; 510 511 len = sizeof(ispc98); 512 if (!sysctlbyname("machdep.ispc98", &ispc98, &len, NULL, 0)) { 513 if (ispc98) 514 machine = "pc98"; 515 } 516 } 517 518 /* 519 * Get the name of this type of MACHINE from utsname 520 * so we can share an executable for similar machines. 521 * (i.e. m68k: amiga hp300, mac68k, sun3, ...) 522 * 523 * Note that while MACHINE is decided at run-time, 524 * MACHINE_ARCH is always known at compile time. 525 */ 526 if (!machine) { 527#ifndef MACHINE 528 struct utsname utsname; 529 530 if (uname(&utsname) == -1) 531 err(2, "uname"); 532 machine = utsname.machine; 533#else 534 machine = MACHINE; 535#endif 536 } 537 538 if (!machine_arch) { 539#ifndef MACHINE_ARCH 540 machine_arch = "unknown"; 541#else 542 machine_arch = MACHINE_ARCH; 543#endif 544 } 545 546 /* 547 * Set machine_cpu to the minumum supported CPU revision based 548 * on the target architecture, if not already set. 549 */ 550 if (!machine_cpu) { 551 if (!strcmp(machine_arch, "i386")) 552 machine_cpu = "i386"; 553 else if (!strcmp(machine_arch, "alpha")) 554 machine_cpu = "ev4"; 555 else 556 machine_cpu = "unknown"; 557 } 558 559 create = Lst_Init(FALSE); 560 makefiles = Lst_Init(FALSE); 561 envFirstVars = Lst_Init(FALSE); 562 expandVars = TRUE; 563 variables = Lst_Init(FALSE); 564 beSilent = FALSE; /* Print commands as executed */ 565 ignoreErrors = FALSE; /* Pay attention to non-zero returns */ 566 noExecute = FALSE; /* Execute all commands */ 567 keepgoing = FALSE; /* Stop on error */ 568 allPrecious = FALSE; /* Remove targets when interrupted */ 569 queryFlag = FALSE; /* This is not just a check-run */ 570 noBuiltins = FALSE; /* Read the built-in rules */ 571 touchFlag = FALSE; /* Actually update targets */ 572 usePipes = TRUE; /* Catch child output in pipes */ 573 debug = 0; /* No debug verbosity, please. */ 574 jobsRunning = FALSE; 575 576 maxJobs = DEFMAXJOBS; 577 forceJobs = FALSE; /* No -j flag */ 578 compatMake = FALSE; /* No compat mode */ 579 580 581 /* 582 * Initialize the parsing, directory and variable modules to prepare 583 * for the reading of inclusion paths and variable settings on the 584 * command line 585 */ 586 Dir_Init(); /* Initialize directory structures so -I flags 587 * can be processed correctly */ 588 Parse_Init(); /* Need to initialize the paths of #include 589 * directories */ 590 Var_Init(); /* As well as the lists of variables for 591 * parsing arguments */ 592 str_init(); 593 594 /* 595 * Initialize various variables. 596 * MAKE also gets this name, for compatibility 597 * .MAKEFLAGS gets set to the empty string just in case. 598 * MFLAGS also gets initialized empty, for compatibility. 599 */ 600 Var_Set("MAKE", argv[0], VAR_GLOBAL); 601 Var_Set(MAKEFLAGS, "", VAR_GLOBAL); 602 Var_Set("MFLAGS", "", VAR_GLOBAL); 603 Var_Set("MACHINE", machine, VAR_GLOBAL); 604 Var_Set("MACHINE_ARCH", machine_arch, VAR_GLOBAL); 605 Var_Set("MACHINE_CPU", machine_cpu, VAR_GLOBAL); 606#ifdef MAKE_VERSION 607 Var_Set("MAKE_VERSION", MAKE_VERSION, VAR_GLOBAL); 608#endif 609 610 /* 611 * First snag any flags out of the MAKE environment variable. 612 * (Note this is *not* MAKEFLAGS since /bin/make uses that and it's 613 * in a different format). 614 */ 615 Main_ParseArgLine(getenv("MAKEFLAGS")); 616 617 MainParseArgs(argc, argv); 618 619 /* 620 * Find where we are... 621 * All this code is so that we know where we are when we start up 622 * on a different machine with pmake. 623 */ 624 curdir = cdpath; 625 if (getcwd(curdir, MAXPATHLEN) == NULL) 626 err(2, NULL); 627 628 if (stat(curdir, &sa) == -1) 629 err(2, "%s", curdir); 630 631 /* 632 * The object directory location is determined using the 633 * following order of preference: 634 * 635 * 1. MAKEOBJDIRPREFIX`cwd` 636 * 2. MAKEOBJDIR 637 * 3. _PATH_OBJDIR.${MACHINE} 638 * 4. _PATH_OBJDIR 639 * 5. _PATH_OBJDIRPREFIX`cwd` 640 * 641 * If one of the first two fails, use the current directory. 642 * If the remaining three all fail, use the current directory. 643 * 644 * Once things are initted, 645 * have to add the original directory to the search path, 646 * and modify the paths for the Makefiles apropriately. The 647 * current directory is also placed as a variable for make scripts. 648 */ 649 if (!(pathp = getenv("MAKEOBJDIRPREFIX"))) { 650 if (!(path = getenv("MAKEOBJDIR"))) { 651 path = _PATH_OBJDIR; 652 pathp = _PATH_OBJDIRPREFIX; 653 (void) snprintf(mdpath, MAXPATHLEN, "%s.%s", 654 path, machine); 655 if (!(objdir = chdir_verify_path(mdpath, obpath))) 656 if (!(objdir=chdir_verify_path(path, obpath))) { 657 (void) snprintf(mdpath, MAXPATHLEN, 658 "%s%s", pathp, curdir); 659 if (!(objdir=chdir_verify_path(mdpath, 660 obpath))) 661 objdir = curdir; 662 } 663 } 664 else if (!(objdir = chdir_verify_path(path, obpath))) 665 objdir = curdir; 666 } 667 else { 668 (void) snprintf(mdpath, MAXPATHLEN, "%s%s", pathp, curdir); 669 if (!(objdir = chdir_verify_path(mdpath, obpath))) 670 objdir = curdir; 671 } 672 Dir_InitDot(); /* Initialize the "." directory */ 673 if (objdir != curdir) 674 Dir_AddDir(dirSearchPath, curdir); 675 Var_Set(".CURDIR", curdir, VAR_GLOBAL); 676 Var_Set(".OBJDIR", objdir, VAR_GLOBAL); 677 678 if (getenv("MAKE_JOBS_FIFO") != NULL) 679 forceJobs = TRUE; 680 /* 681 * Be compatible if user did not specify -j and did not explicitly 682 * turned compatibility on 683 */ 684 if (!compatMake && !forceJobs) 685 compatMake = TRUE; 686 687 /* 688 * Initialize archive, target and suffix modules in preparation for 689 * parsing the makefile(s) 690 */ 691 Arch_Init(); 692 Targ_Init(); 693 Suff_Init(); 694 695 DEFAULT = NULL; 696 (void)time(&now); 697 698 /* 699 * Set up the .TARGETS variable to contain the list of targets to be 700 * created. If none specified, make the variable empty -- the parser 701 * will fill the thing in with the default or .MAIN target. 702 */ 703 if (!Lst_IsEmpty(create)) { 704 LstNode ln; 705 706 for (ln = Lst_First(create); ln != NULL; 707 ln = Lst_Succ(ln)) { 708 char *name = (char *)Lst_Datum(ln); 709 710 Var_Append(".TARGETS", name, VAR_GLOBAL); 711 } 712 } else 713 Var_Set(".TARGETS", "", VAR_GLOBAL); 714 715 716 /* 717 * If no user-supplied system path was given (through the -m option) 718 * add the directories from the DEFSYSPATH (more than one may be given 719 * as dir1:...:dirn) to the system include path. 720 */ 721 if (Lst_IsEmpty(sysIncPath)) { 722 for (start = syspath; *start != '\0'; start = cp) { 723 for (cp = start; *cp != '\0' && *cp != ':'; cp++) 724 continue; 725 if (*cp == '\0') { 726 Dir_AddDir(sysIncPath, start); 727 } else { 728 *cp++ = '\0'; 729 Dir_AddDir(sysIncPath, start); 730 } 731 } 732 } 733 734 /* 735 * Read in the built-in rules first, followed by the specified 736 * makefile, if it was (makefile != (char *) NULL), or the default 737 * Makefile and makefile, in that order, if it wasn't. 738 */ 739 if (!noBuiltins) { 740 LstNode ln; 741 742 sysMkPath = Lst_Init (FALSE); 743 Dir_Expand (_PATH_DEFSYSMK, sysIncPath, sysMkPath); 744 if (Lst_IsEmpty(sysMkPath)) 745 Fatal("make: no system rules (%s).", _PATH_DEFSYSMK); 746 ln = Lst_Find(sysMkPath, (void *)NULL, ReadMakefile); 747 if (ln != NULL) 748 Fatal("make: cannot open %s.", (char *)Lst_Datum(ln)); 749 } 750 751 if (!Lst_IsEmpty(makefiles)) { 752 LstNode ln; 753 754 ln = Lst_Find(makefiles, (void *)NULL, ReadMakefile); 755 if (ln != NULL) 756 Fatal("make: cannot open %s.", (char *)Lst_Datum(ln)); 757 } else if (!ReadMakefile("BSDmakefile", NULL)) 758 if (!ReadMakefile("makefile", NULL)) 759 (void)ReadMakefile("Makefile", NULL); 760 761 (void)ReadMakefile(".depend", NULL); 762 763 /* Install all the flags into the MAKE envariable. */ 764 if (((p = Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1)) != NULL) && *p) 765 setenv("MAKEFLAGS", p, 1); 766 free(p1); 767 768 /* 769 * For compatibility, look at the directories in the VPATH variable 770 * and add them to the search path, if the variable is defined. The 771 * variable's value is in the same format as the PATH envariable, i.e. 772 * <directory>:<directory>:<directory>... 773 */ 774 if (Var_Exists("VPATH", VAR_CMD)) { 775 char *vpath, savec; 776 /* 777 * GCC stores string constants in read-only memory, but 778 * Var_Subst will want to write this thing, so store it 779 * in an array 780 */ 781 static char VPATH[] = "${VPATH}"; 782 783 vpath = Var_Subst(NULL, VPATH, VAR_CMD, FALSE); 784 path = vpath; 785 do { 786 /* skip to end of directory */ 787 for (cp = path; *cp != ':' && *cp != '\0'; cp++) 788 continue; 789 /* Save terminator character so know when to stop */ 790 savec = *cp; 791 *cp = '\0'; 792 /* Add directory to search path */ 793 Dir_AddDir(dirSearchPath, path); 794 *cp = savec; 795 path = cp + 1; 796 } while (savec == ':'); 797 (void)free(vpath); 798 } 799 800 /* 801 * Now that all search paths have been read for suffixes et al, it's 802 * time to add the default search path to their lists... 803 */ 804 Suff_DoPaths(); 805 806 /* print the initial graph, if the user requested it */ 807 if (DEBUG(GRAPH1)) 808 Targ_PrintGraph(1); 809 810 /* print the values of any variables requested by the user */ 811 if (!Lst_IsEmpty(variables)) { 812 LstNode ln; 813 814 for (ln = Lst_First(variables); ln != NULL; 815 ln = Lst_Succ(ln)) { 816 char *value; 817 if (expandVars) { 818 p1 = emalloc(strlen((char *)Lst_Datum(ln)) + 1 + 3); 819 /* This sprintf is safe, because of the malloc above */ 820 (void)sprintf(p1, "${%s}", (char *)Lst_Datum(ln)); 821 value = Var_Subst(NULL, p1, VAR_GLOBAL, FALSE); 822 } else { 823 value = Var_Value((char *)Lst_Datum(ln), 824 VAR_GLOBAL, &p1); 825 } 826 printf("%s\n", value ? value : ""); 827 if (p1) 828 free(p1); 829 } 830 } else { 831 832 /* 833 * Have now read the entire graph and need to make a list of targets 834 * to create. If none was given on the command line, we consult the 835 * parsing module to find the main target(s) to create. 836 */ 837 if (Lst_IsEmpty(create)) 838 targs = Parse_MainName(); 839 else 840 targs = Targ_FindList(create, TARG_CREATE); 841 842 if (!compatMake) { 843 /* 844 * Initialize job module before traversing the graph, now that 845 * any .BEGIN and .END targets have been read. This is done 846 * only if the -q flag wasn't given (to prevent the .BEGIN from 847 * being executed should it exist). 848 */ 849 if (!queryFlag) { 850 Job_Init(maxJobs); 851 jobsRunning = TRUE; 852 } 853 854 /* Traverse the graph, checking on all the targets */ 855 outOfDate = Make_Run(targs); 856 } else { 857 /* 858 * Compat_Init will take care of creating all the targets as 859 * well as initializing the module. 860 */ 861 Compat_Run(targs); 862 outOfDate = 0; 863 } 864 Lst_Destroy(targs, NOFREE); 865 } 866 867 Lst_Destroy(variables, NOFREE); 868 Lst_Destroy(makefiles, NOFREE); 869 Lst_Destroy(create, (void (*)(void *)) free); 870 871 /* print the graph now it's been processed if the user requested it */ 872 if (DEBUG(GRAPH2)) 873 Targ_PrintGraph(2); 874 875 Suff_End(); 876 Targ_End(); 877 Arch_End(); 878 str_end(); 879 Var_End(); 880 Parse_End(); 881 Dir_End(); 882 883 if (queryFlag && outOfDate) 884 return(1); 885 else 886 return(0); 887} 888 889/*- 890 * ReadMakefile -- 891 * Open and parse the given makefile. 892 * 893 * Results: 894 * TRUE if ok. FALSE if couldn't open file. 895 * 896 * Side Effects: 897 * lots 898 */ 899static Boolean 900ReadMakefile(void *p, void *q __unused) 901{ 902 char *fname; /* makefile to read */ 903 FILE *stream; 904 char *name, path[MAXPATHLEN]; 905 char *MAKEFILE; 906 int setMAKEFILE; 907 908 fname = p; 909 910 if (!strcmp(fname, "-")) { 911 Parse_File("(stdin)", stdin); 912 Var_Set("MAKEFILE", "", VAR_GLOBAL); 913 } else { 914 setMAKEFILE = strcmp(fname, ".depend"); 915 916 /* if we've chdir'd, rebuild the path name */ 917 if (curdir != objdir && *fname != '/') { 918 (void)snprintf(path, MAXPATHLEN, "%s/%s", curdir, fname); 919 /* 920 * XXX The realpath stuff breaks relative includes 921 * XXX in some cases. The problem likely is in 922 * XXX parse.c where it does special things in 923 * XXX ParseDoInclude if the file is relateive 924 * XXX or absolute and not a system file. There 925 * XXX it assumes that if the current file that's 926 * XXX being included is absolute, that any files 927 * XXX that it includes shouldn't do the -I path 928 * XXX stuff, which is inconsistant with historical 929 * XXX behavior. However, I can't pentrate the mists 930 * XXX further, so I'm putting this workaround in 931 * XXX here until such time as the underlying bug 932 * XXX can be fixed. 933 */ 934#if THIS_BREAKS_THINGS 935 if (realpath(path, path) != NULL && 936 (stream = fopen(path, "r")) != NULL) { 937 MAKEFILE = fname; 938 fname = path; 939 goto found; 940 } 941 } else if (realpath(fname, path) != NULL) { 942 MAKEFILE = fname; 943 fname = path; 944 if ((stream = fopen(fname, "r")) != NULL) 945 goto found; 946 } 947#else 948 if ((stream = fopen(path, "r")) != NULL) { 949 MAKEFILE = fname; 950 fname = path; 951 goto found; 952 } 953 } else { 954 MAKEFILE = fname; 955 if ((stream = fopen(fname, "r")) != NULL) 956 goto found; 957 } 958#endif 959 /* look in -I and system include directories. */ 960 name = Dir_FindFile(fname, parseIncPath); 961 if (!name) 962 name = Dir_FindFile(fname, sysIncPath); 963 if (!name || !(stream = fopen(name, "r"))) 964 return(FALSE); 965 MAKEFILE = fname = name; 966 /* 967 * set the MAKEFILE variable desired by System V fans -- the 968 * placement of the setting here means it gets set to the last 969 * makefile specified, as it is set by SysV make. 970 */ 971found: 972 if (setMAKEFILE) 973 Var_Set("MAKEFILE", MAKEFILE, VAR_GLOBAL); 974 Parse_File(fname, stream); 975 (void)fclose(stream); 976 } 977 return(TRUE); 978} 979 980/*- 981 * Cmd_Exec -- 982 * Execute the command in cmd, and return the output of that command 983 * in a string. 984 * 985 * Results: 986 * A string containing the output of the command, or the empty string 987 * If error is not NULL, it contains the reason for the command failure 988 * 989 * Side Effects: 990 * The string must be freed by the caller. 991 */ 992char * 993Cmd_Exec(char *cmd, char **error) 994{ 995 char *args[4]; /* Args for invoking the shell */ 996 int fds[2]; /* Pipe streams */ 997 int cpid; /* Child PID */ 998 int pid; /* PID from wait() */ 999 char *res; /* result */ 1000 int status; /* command exit status */ 1001 Buffer buf; /* buffer to store the result */ 1002 char *cp; 1003 int cc; 1004 1005 *error = NULL; 1006 1007 if (shellPath == NULL) 1008 Shell_Init(); 1009 /* 1010 * Set up arguments for shell 1011 */ 1012 args[0] = shellName; 1013 args[1] = "-c"; 1014 args[2] = cmd; 1015 args[3] = NULL; 1016 1017 /* 1018 * Open a pipe for fetching its output 1019 */ 1020 if (pipe(fds) == -1) { 1021 *error = "Couldn't create pipe for \"%s\""; 1022 goto bad; 1023 } 1024 1025 /* 1026 * Fork 1027 */ 1028 switch (cpid = vfork()) { 1029 case 0: 1030 /* 1031 * Close input side of pipe 1032 */ 1033 (void) close(fds[0]); 1034 1035 /* 1036 * Duplicate the output stream to the shell's output, then 1037 * shut the extra thing down. Note we don't fetch the error 1038 * stream...why not? Why? 1039 */ 1040 (void) dup2(fds[1], 1); 1041 (void) close(fds[1]); 1042 1043 (void) execv(shellPath, args); 1044 _exit(1); 1045 /*NOTREACHED*/ 1046 1047 case -1: 1048 *error = "Couldn't exec \"%s\""; 1049 goto bad; 1050 1051 default: 1052 /* 1053 * No need for the writing half 1054 */ 1055 (void) close(fds[1]); 1056 1057 buf = Buf_Init (MAKE_BSIZE); 1058 1059 do { 1060 char result[BUFSIZ]; 1061 cc = read(fds[0], result, sizeof(result)); 1062 if (cc > 0) 1063 Buf_AddBytes(buf, cc, (Byte *) result); 1064 } 1065 while (cc > 0 || (cc == -1 && errno == EINTR)); 1066 1067 /* 1068 * Close the input side of the pipe. 1069 */ 1070 (void) close(fds[0]); 1071 1072 /* 1073 * Wait for the process to exit. 1074 */ 1075 while(((pid = wait(&status)) != cpid) && (pid >= 0)) 1076 continue; 1077 1078 if (cc == -1) 1079 *error = "Error reading shell's output for \"%s\""; 1080 1081 res = (char *)Buf_GetAll (buf, &cc); 1082 Buf_Destroy (buf, FALSE); 1083 1084 if (status) 1085 *error = "\"%s\" returned non-zero status"; 1086 1087 /* 1088 * Null-terminate the result, convert newlines to spaces and 1089 * install it in the variable. 1090 */ 1091 res[cc] = '\0'; 1092 cp = &res[cc] - 1; 1093 1094 if (*cp == '\n') { 1095 /* 1096 * A final newline is just stripped 1097 */ 1098 *cp-- = '\0'; 1099 } 1100 while (cp >= res) { 1101 if (*cp == '\n') { 1102 *cp = ' '; 1103 } 1104 cp--; 1105 } 1106 break; 1107 } 1108 return res; 1109bad: 1110 res = emalloc(1); 1111 *res = '\0'; 1112 return res; 1113} 1114 1115/* 1116 * usage -- 1117 * exit with usage message 1118 */ 1119static void 1120usage(void) 1121{ 1122 (void)fprintf(stderr, "%s\n%s\n%s\n", 1123"usage: make [-BPSXeiknqrstv] [-C directory] [-D variable] [-d flags]", 1124" [-E variable] [-f makefile] [-I directory] [-j max_jobs]", 1125" [-m directory] [-V variable] [variable=value] [target ...]"); 1126 exit(2); 1127} 1128