main.c revision 141133
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 141133 2005-02-02 07:36:18Z 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#ifndef MACHINE 64#include <sys/utsname.h> 65#endif 66#include <sys/param.h> 67#include <sys/stat.h> 68#include <sys/sysctl.h> 69#include <sys/time.h> 70#include <sys/resource.h> 71#include <sys/wait.h> 72#include <err.h> 73#include <errno.h> 74#include <signal.h> 75#include <stdlib.h> 76#include <string.h> 77#include <unistd.h> 78 79#include "arch.h" 80#include "buf.h" 81#include "compat.h" 82#include "config.h" 83#include "dir.h" 84#include "globals.h" 85#include "job.h" 86#include "make.h" 87#include "nonints.h" 88#include "parse.h" 89#include "pathnames.h" 90#include "str.h" 91#include "suff.h" 92#include "targ.h" 93#include "util.h" 94#include "var.h" 95 96#define WANT_ENV_MKLVL 1 97#define MKLVL_MAXVAL 500 98#define MKLVL_ENVVAR "__MKLVL__" 99 100#define MAKEFLAGS ".MAKEFLAGS" 101 102/* Targets to be made */ 103Lst create = Lst_Initializer(create); 104 105time_t now; /* Time at start of make */ 106struct GNode *DEFAULT; /* .DEFAULT node */ 107Boolean allPrecious; /* .PRECIOUS given on line by itself */ 108 109static Boolean noBuiltins; /* -r flag */ 110 111/* ordered list of makefiles to read */ 112static Lst makefiles = Lst_Initializer(makefiles); 113 114static Boolean expandVars; /* fully expand printed variables */ 115 116/* list of variables to print */ 117static Lst variables = Lst_Initializer(variables); 118 119int maxJobs; /* -j argument */ 120static Boolean forceJobs; /* -j argument given */ 121Boolean compatMake; /* -B argument */ 122Boolean debug; /* -d flag */ 123Boolean noExecute; /* -n flag */ 124Boolean keepgoing; /* -k flag */ 125Boolean queryFlag; /* -q flag */ 126Boolean touchFlag; /* -t flag */ 127Boolean usePipes; /* !-P flag */ 128Boolean ignoreErrors; /* -i flag */ 129Boolean beSilent; /* -s flag */ 130Boolean beVerbose; /* -v flag */ 131Boolean oldVars; /* variable substitution style */ 132Boolean checkEnvFirst; /* -e flag */ 133 134/* (-E) vars to override from env */ 135Lst envFirstVars = Lst_Initializer(envFirstVars); 136 137Boolean jobsRunning; /* TRUE if the jobs might be running */ 138 139static void MainParseArgs(int, char **); 140char * chdir_verify_path(char *, char *); 141static int ReadMakefile(const void *, const void *); 142static void usage(void); 143 144static char *curdir; /* startup directory */ 145static char *objdir; /* where we chdir'ed to */ 146 147/* 148 * Append a flag with an optional argument to MAKEFLAGS and MFLAGS 149 */ 150static void 151MFLAGS_append(char *flag, char *arg) 152{ 153 char *str; 154 155 Var_Append(MAKEFLAGS, flag, VAR_GLOBAL); 156 if (arg != NULL) { 157 str = MAKEFLAGS_quote(arg); 158 Var_Append(MAKEFLAGS, str, VAR_GLOBAL); 159 free(str); 160 } 161 162 Var_Append("MFLAGS", flag, VAR_GLOBAL); 163 if (arg != NULL) { 164 str = MAKEFLAGS_quote(arg); 165 Var_Append("MFLAGS", str, VAR_GLOBAL); 166 free(str); 167 } 168} 169 170/*- 171 * MainParseArgs -- 172 * Parse a given argument vector. Called from main() and from 173 * Main_ParseArgLine() when the .MAKEFLAGS target is used. 174 * 175 * XXX: Deal with command line overriding .MAKEFLAGS in makefile 176 * 177 * Results: 178 * None 179 * 180 * Side Effects: 181 * Various global and local flags will be set depending on the flags 182 * given 183 */ 184static void 185MainParseArgs(int argc, char **argv) 186{ 187 int c; 188 189 optind = 1; /* since we're called more than once */ 190#define OPTFLAGS "BC:D:E:I:PSV:Xd:ef:ij:km:nqrstv" 191rearg: while((c = getopt(argc, argv, OPTFLAGS)) != -1) { 192 switch(c) { 193 case 'C': 194 if (chdir(optarg) == -1) 195 err(1, "chdir %s", optarg); 196 break; 197 case 'D': 198 Var_Set(optarg, "1", VAR_GLOBAL); 199 MFLAGS_append("-D", optarg); 200 break; 201 case 'I': 202 Parse_AddIncludeDir(optarg); 203 MFLAGS_append("-I", optarg); 204 break; 205 case 'V': 206 Lst_AtEnd(&variables, estrdup(optarg)); 207 MFLAGS_append("-V", optarg); 208 break; 209 case 'X': 210 expandVars = FALSE; 211 break; 212 case 'B': 213 compatMake = TRUE; 214 MFLAGS_append("-B", NULL); 215 unsetenv("MAKE_JOBS_FIFO"); 216 break; 217 case 'P': 218 usePipes = FALSE; 219 MFLAGS_append("-P", NULL); 220 break; 221 case 'S': 222 keepgoing = FALSE; 223 MFLAGS_append("-S", NULL); 224 break; 225 case 'd': { 226 char *modules = optarg; 227 228 for (; *modules; ++modules) 229 switch (*modules) { 230 case 'A': 231 debug = ~0; 232 break; 233 case 'a': 234 debug |= DEBUG_ARCH; 235 break; 236 case 'c': 237 debug |= DEBUG_COND; 238 break; 239 case 'd': 240 debug |= DEBUG_DIR; 241 break; 242 case 'f': 243 debug |= DEBUG_FOR; 244 break; 245 case 'g': 246 if (modules[1] == '1') { 247 debug |= DEBUG_GRAPH1; 248 ++modules; 249 } 250 else if (modules[1] == '2') { 251 debug |= DEBUG_GRAPH2; 252 ++modules; 253 } 254 break; 255 case 'j': 256 debug |= DEBUG_JOB; 257 break; 258 case 'l': 259 debug |= DEBUG_LOUD; 260 break; 261 case 'm': 262 debug |= DEBUG_MAKE; 263 break; 264 case 's': 265 debug |= DEBUG_SUFF; 266 break; 267 case 't': 268 debug |= DEBUG_TARG; 269 break; 270 case 'v': 271 debug |= DEBUG_VAR; 272 break; 273 default: 274 warnx("illegal argument to d option -- %c", *modules); 275 usage(); 276 } 277 MFLAGS_append("-d", optarg); 278 break; 279 } 280 case 'E': 281 Lst_AtEnd(&envFirstVars, estrdup(optarg)); 282 MFLAGS_append("-E", optarg); 283 break; 284 case 'e': 285 checkEnvFirst = TRUE; 286 MFLAGS_append("-e", NULL); 287 break; 288 case 'f': 289 Lst_AtEnd(&makefiles, estrdup(optarg)); 290 break; 291 case 'i': 292 ignoreErrors = TRUE; 293 MFLAGS_append("-i", NULL); 294 break; 295 case 'j': { 296 char *endptr; 297 298 forceJobs = TRUE; 299 maxJobs = strtol(optarg, &endptr, 10); 300 if (maxJobs <= 0 || *endptr != '\0') { 301 warnx("illegal number, -j argument -- %s", 302 optarg); 303 usage(); 304 } 305 MFLAGS_append("-j", optarg); 306 break; 307 } 308 case 'k': 309 keepgoing = TRUE; 310 MFLAGS_append("-k", NULL); 311 break; 312 case 'm': 313 Dir_AddDir(&sysIncPath, optarg); 314 MFLAGS_append("-m", optarg); 315 break; 316 case 'n': 317 noExecute = TRUE; 318 MFLAGS_append("-n", NULL); 319 break; 320 case 'q': 321 queryFlag = TRUE; 322 /* Kind of nonsensical, wot? */ 323 MFLAGS_append("-q", NULL); 324 break; 325 case 'r': 326 noBuiltins = TRUE; 327 MFLAGS_append("-r", NULL); 328 break; 329 case 's': 330 beSilent = TRUE; 331 MFLAGS_append("-s", NULL); 332 break; 333 case 't': 334 touchFlag = TRUE; 335 MFLAGS_append("-t", NULL); 336 break; 337 case 'v': 338 beVerbose = TRUE; 339 MFLAGS_append("-v", NULL); 340 break; 341 default: 342 case '?': 343 usage(); 344 } 345 } 346 347 oldVars = TRUE; 348 349 /* 350 * See if the rest of the arguments are variable assignments and 351 * perform them if so. Else take them to be targets and stuff them 352 * on the end of the "create" list. 353 */ 354 for (argv += optind, argc -= optind; *argv; ++argv, --argc) 355 if (Parse_IsVar(*argv)) { 356 char *ptr = MAKEFLAGS_quote(*argv); 357 358 Var_Append(MAKEFLAGS, ptr, VAR_GLOBAL); 359 free(ptr); 360 361 Parse_DoVar(*argv, VAR_CMD); 362 } else { 363 if (!**argv) 364 Punt("illegal (null) argument."); 365 if (**argv == '-') { 366 if ((*argv)[1]) 367 optind = 0; /* -flag... */ 368 else 369 optind = 1; /* - */ 370 goto rearg; 371 } 372 Lst_AtEnd(&create, estrdup(*argv)); 373 } 374} 375 376/*- 377 * Main_ParseArgLine -- 378 * Used by the parse module when a .MFLAGS or .MAKEFLAGS target 379 * is encountered and by main() when reading the .MAKEFLAGS envariable. 380 * Takes a line of arguments and breaks it into its 381 * component words and passes those words and the number of them to the 382 * MainParseArgs function. 383 * The line should have all its leading whitespace removed. 384 * 385 * Results: 386 * None 387 * 388 * Side Effects: 389 * Only those that come from the various arguments. 390 */ 391void 392Main_ParseArgLine(char *line, int mflags) 393{ 394 char **argv; /* Manufactured argument vector */ 395 int argc; /* Number of arguments in argv */ 396 397 if (line == NULL) 398 return; 399 for (; *line == ' '; ++line) 400 continue; 401 if (!*line) 402 return; 403 404 if (mflags) 405 argv = MAKEFLAGS_break(line, &argc); 406 else 407 argv = brk_string(line, &argc, TRUE); 408 409 MainParseArgs(argc, argv); 410} 411 412char * 413chdir_verify_path(char *path, char *obpath) 414{ 415 struct stat sb; 416 417 if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) { 418 if (chdir(path) == -1 || getcwd(obpath, MAXPATHLEN) == NULL) { 419 warn("warning: %s", path); 420 return (0); 421 } 422 return (obpath); 423 } 424 425 return (0); 426} 427 428static void 429catch_child(int sig __unused) 430{ 431} 432 433/* 434 * In lieu of a good way to prevent every possible looping in 435 * make(1), stop there from being more than MKLVL_MAXVAL processes forked 436 * by make(1), to prevent a forkbomb from happening, in a dumb and 437 * mechanical way. 438 */ 439static void 440check_make_level(void) 441{ 442#ifdef WANT_ENV_MKLVL 443 char *value = getenv(MKLVL_ENVVAR); 444 int level = (value == NULL) ? 0 : atoi(value); 445 446 if (level < 0) { 447 errc(2, EAGAIN, "Invalid value for recursion level (%d).", level); 448 } else if (level > MKLVL_MAXVAL) { 449 errc(2, EAGAIN, "Max recursion level (%d) exceeded.", MKLVL_MAXVAL); 450 } else { 451 char new_value[32]; 452 sprintf(new_value, "%d", level + 1); 453 setenv(MKLVL_ENVVAR, new_value, 1); 454 } 455#endif /* WANT_ENV_MKLVL */ 456} 457 458/*- 459 * main -- 460 * The main function, for obvious reasons. Initializes variables 461 * and a few modules, then parses the arguments give it in the 462 * environment and on the command line. Reads the system makefile 463 * followed by either Makefile, makefile or the file given by the 464 * -f argument. Sets the .MAKEFLAGS PMake variable based on all the 465 * flags it has received by then uses either the Make or the Compat 466 * module to create the initial list of targets. 467 * 468 * Results: 469 * If -q was given, exits -1 if anything was out-of-date. Else it exits 470 * 0. 471 * 472 * Side Effects: 473 * The program exits when done. Targets are created. etc. etc. etc. 474 */ 475int 476main(int argc, char **argv) 477{ 478 Boolean outOfDate = TRUE; /* FALSE if all targets up to date */ 479 struct stat sa; 480 char *p, *p1, *path, *pathp; 481 char mdpath[MAXPATHLEN]; 482 char obpath[MAXPATHLEN]; 483 char cdpath[MAXPATHLEN]; 484 char *machine = getenv("MACHINE"); 485 char *machine_arch = getenv("MACHINE_ARCH"); 486 char *machine_cpu = getenv("MACHINE_CPU"); 487 char *cp = NULL, *start; 488 /* avoid faults on read-only strings */ 489 static char syspath[] = _PATH_DEFSYSPATH; 490 491 { 492 /* 493 * Catch SIGCHLD so that we get kicked out of select() when we 494 * need to look at a child. This is only known to matter for the 495 * -j case (perhaps without -P). 496 * 497 * XXX this is intentionally misplaced. 498 */ 499 struct sigaction sa; 500 501 sigemptyset(&sa.sa_mask); 502 sa.sa_flags = SA_RESTART | SA_NOCLDSTOP; 503 sa.sa_handler = catch_child; 504 sigaction(SIGCHLD, &sa, NULL); 505 } 506 507 check_make_level(); 508 509#if DEFSHELL == 2 510 /* 511 * Turn off ENV to make ksh happier. 512 */ 513 unsetenv("ENV"); 514#endif 515 516#ifdef RLIMIT_NOFILE 517 /* 518 * get rid of resource limit on file descriptors 519 */ 520 { 521 struct rlimit rl; 522 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 && 523 rl.rlim_cur != rl.rlim_max) { 524 rl.rlim_cur = rl.rlim_max; 525 setrlimit(RLIMIT_NOFILE, &rl); 526 } 527 } 528#endif 529 530 /* 531 * PC-98 kernel sets the `i386' string to the utsname.machine and 532 * it cannot be distinguished from IBM-PC by uname(3). Therefore, 533 * we check machine.ispc98 and adjust the machine variable before 534 * using usname(3) below. 535 * NOTE: machdep.ispc98 was defined on 1998/8/31. At that time, 536 * __FreeBSD_version was defined as 300003. So, this check can 537 * safely be done with any kernel with version > 300003. 538 */ 539 if (!machine) { 540 int ispc98; 541 size_t len; 542 543 len = sizeof(ispc98); 544 if (!sysctlbyname("machdep.ispc98", &ispc98, &len, NULL, 0)) { 545 if (ispc98) 546 machine = "pc98"; 547 } 548 } 549 550 /* 551 * Get the name of this type of MACHINE from utsname 552 * so we can share an executable for similar machines. 553 * (i.e. m68k: amiga hp300, mac68k, sun3, ...) 554 * 555 * Note that while MACHINE is decided at run-time, 556 * MACHINE_ARCH is always known at compile time. 557 */ 558 if (!machine) { 559#ifndef MACHINE 560 struct utsname utsname; 561 562 if (uname(&utsname) == -1) 563 err(2, "uname"); 564 machine = utsname.machine; 565#else 566 machine = MACHINE; 567#endif 568 } 569 570 if (!machine_arch) { 571#ifndef MACHINE_ARCH 572 machine_arch = "unknown"; 573#else 574 machine_arch = MACHINE_ARCH; 575#endif 576 } 577 578 /* 579 * Set machine_cpu to the minumum supported CPU revision based 580 * on the target architecture, if not already set. 581 */ 582 if (!machine_cpu) { 583 if (!strcmp(machine_arch, "i386")) 584 machine_cpu = "i386"; 585 else if (!strcmp(machine_arch, "alpha")) 586 machine_cpu = "ev4"; 587 else 588 machine_cpu = "unknown"; 589 } 590 591 expandVars = TRUE; 592 beSilent = FALSE; /* Print commands as executed */ 593 ignoreErrors = FALSE; /* Pay attention to non-zero returns */ 594 noExecute = FALSE; /* Execute all commands */ 595 keepgoing = FALSE; /* Stop on error */ 596 allPrecious = FALSE; /* Remove targets when interrupted */ 597 queryFlag = FALSE; /* This is not just a check-run */ 598 noBuiltins = FALSE; /* Read the built-in rules */ 599 touchFlag = FALSE; /* Actually update targets */ 600 usePipes = TRUE; /* Catch child output in pipes */ 601 debug = 0; /* No debug verbosity, please. */ 602 jobsRunning = FALSE; 603 604 maxJobs = DEFMAXJOBS; 605 forceJobs = FALSE; /* No -j flag */ 606 compatMake = FALSE; /* No compat mode */ 607 608 /* 609 * Initialize the parsing, directory and variable modules to prepare 610 * for the reading of inclusion paths and variable settings on the 611 * command line 612 */ 613 Dir_Init(); /* Initialize directory structures so -I flags 614 * can be processed correctly */ 615 Parse_Init(); /* Need to initialize the paths of #include 616 * directories */ 617 Var_Init(); /* As well as the lists of variables for 618 * parsing arguments */ 619 str_init(); 620 621 /* 622 * Initialize various variables. 623 * MAKE also gets this name, for compatibility 624 * .MAKEFLAGS gets set to the empty string just in case. 625 * MFLAGS also gets initialized empty, for compatibility. 626 */ 627 Var_Set("MAKE", argv[0], VAR_GLOBAL); 628 Var_Set(MAKEFLAGS, "", VAR_GLOBAL); 629 Var_Set("MFLAGS", "", VAR_GLOBAL); 630 Var_Set("MACHINE", machine, VAR_GLOBAL); 631 Var_Set("MACHINE_ARCH", machine_arch, VAR_GLOBAL); 632 Var_Set("MACHINE_CPU", machine_cpu, VAR_GLOBAL); 633#ifdef MAKE_VERSION 634 Var_Set("MAKE_VERSION", MAKE_VERSION, VAR_GLOBAL); 635#endif 636 637 /* 638 * First snag any flags out of the MAKE environment variable. 639 * (Note this is *not* MAKEFLAGS since /bin/make uses that and it's 640 * in a different format). 641 */ 642 Main_ParseArgLine(getenv("MAKEFLAGS"), 1); 643 644 MainParseArgs(argc, argv); 645 646 /* 647 * Find where we are... 648 * All this code is so that we know where we are when we start up 649 * on a different machine with pmake. 650 */ 651 curdir = cdpath; 652 if (getcwd(curdir, MAXPATHLEN) == NULL) 653 err(2, NULL); 654 655 if (stat(curdir, &sa) == -1) 656 err(2, "%s", curdir); 657 658 /* 659 * The object directory location is determined using the 660 * following order of preference: 661 * 662 * 1. MAKEOBJDIRPREFIX`cwd` 663 * 2. MAKEOBJDIR 664 * 3. _PATH_OBJDIR.${MACHINE} 665 * 4. _PATH_OBJDIR 666 * 5. _PATH_OBJDIRPREFIX`cwd` 667 * 668 * If one of the first two fails, use the current directory. 669 * If the remaining three all fail, use the current directory. 670 * 671 * Once things are initted, 672 * have to add the original directory to the search path, 673 * and modify the paths for the Makefiles apropriately. The 674 * current directory is also placed as a variable for make scripts. 675 */ 676 if (!(pathp = getenv("MAKEOBJDIRPREFIX"))) { 677 if (!(path = getenv("MAKEOBJDIR"))) { 678 path = _PATH_OBJDIR; 679 pathp = _PATH_OBJDIRPREFIX; 680 snprintf(mdpath, MAXPATHLEN, "%s.%s", 681 path, machine); 682 if (!(objdir = chdir_verify_path(mdpath, obpath))) 683 if (!(objdir=chdir_verify_path(path, obpath))) { 684 snprintf(mdpath, MAXPATHLEN, 685 "%s%s", pathp, curdir); 686 if (!(objdir=chdir_verify_path(mdpath, 687 obpath))) 688 objdir = curdir; 689 } 690 } 691 else if (!(objdir = chdir_verify_path(path, obpath))) 692 objdir = curdir; 693 } 694 else { 695 snprintf(mdpath, MAXPATHLEN, "%s%s", pathp, curdir); 696 if (!(objdir = chdir_verify_path(mdpath, obpath))) 697 objdir = curdir; 698 } 699 Dir_InitDot(); /* Initialize the "." directory */ 700 if (objdir != curdir) 701 Dir_AddDir(&dirSearchPath, curdir); 702 Var_Set(".CURDIR", curdir, VAR_GLOBAL); 703 Var_Set(".OBJDIR", objdir, VAR_GLOBAL); 704 705 if (getenv("MAKE_JOBS_FIFO") != NULL) 706 forceJobs = TRUE; 707 /* 708 * Be compatible if user did not specify -j and did not explicitly 709 * turned compatibility on 710 */ 711 if (!compatMake && !forceJobs) 712 compatMake = TRUE; 713 714 /* 715 * Initialize archive, target and suffix modules in preparation for 716 * parsing the makefile(s) 717 */ 718 Arch_Init(); 719 Targ_Init(); 720 Suff_Init(); 721 722 DEFAULT = NULL; 723 time(&now); 724 725 /* 726 * Set up the .TARGETS variable to contain the list of targets to be 727 * created. If none specified, make the variable empty -- the parser 728 * will fill the thing in with the default or .MAIN target. 729 */ 730 if (!Lst_IsEmpty(&create)) { 731 LstNode *ln; 732 733 for (ln = Lst_First(&create); ln != NULL; ln = Lst_Succ(ln)) { 734 char *name = Lst_Datum(ln); 735 736 Var_Append(".TARGETS", name, VAR_GLOBAL); 737 } 738 } else 739 Var_Set(".TARGETS", "", VAR_GLOBAL); 740 741 742 /* 743 * If no user-supplied system path was given (through the -m option) 744 * add the directories from the DEFSYSPATH (more than one may be given 745 * as dir1:...:dirn) to the system include path. 746 */ 747 if (Lst_IsEmpty(&sysIncPath)) { 748 for (start = syspath; *start != '\0'; start = cp) { 749 for (cp = start; *cp != '\0' && *cp != ':'; cp++) 750 continue; 751 if (*cp == '\0') { 752 Dir_AddDir(&sysIncPath, start); 753 } else { 754 *cp++ = '\0'; 755 Dir_AddDir(&sysIncPath, start); 756 } 757 } 758 } 759 760 /* 761 * Read in the built-in rules first, followed by the specified 762 * makefile, if it was (makefile != (char *) NULL), or the default 763 * Makefile and makefile, in that order, if it wasn't. 764 */ 765 if (!noBuiltins) { 766 /* Path of sys.mk */ 767 Lst sysMkPath = Lst_Initializer(sysMkPath); 768 LstNode *ln; 769 770 Dir_Expand(_PATH_DEFSYSMK, &sysIncPath, &sysMkPath); 771 if (Lst_IsEmpty(&sysMkPath)) 772 Fatal("make: no system rules (%s).", _PATH_DEFSYSMK); 773 ln = Lst_Find(&sysMkPath, NULL, ReadMakefile); 774 if (ln != NULL) 775 Fatal("make: cannot open %s.", (char *)Lst_Datum(ln)); 776 Lst_Destroy(&sysMkPath, free); 777 } 778 779 if (!Lst_IsEmpty(&makefiles)) { 780 LstNode *ln; 781 782 ln = Lst_Find(&makefiles, NULL, ReadMakefile); 783 if (ln != NULL) 784 Fatal("make: cannot open %s.", (char *)Lst_Datum(ln)); 785 } else if (!ReadMakefile("BSDmakefile", NULL)) 786 if (!ReadMakefile("makefile", NULL)) 787 ReadMakefile("Makefile", NULL); 788 789 ReadMakefile(".depend", NULL); 790 791 /* Install all the flags into the MAKE envariable. */ 792 if (((p = Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1)) != NULL) && *p) 793 setenv("MAKEFLAGS", p, 1); 794 free(p1); 795 796 /* 797 * For compatibility, look at the directories in the VPATH variable 798 * and add them to the search path, if the variable is defined. The 799 * variable's value is in the same format as the PATH envariable, i.e. 800 * <directory>:<directory>:<directory>... 801 */ 802 if (Var_Exists("VPATH", VAR_CMD)) { 803 char *vpath, savec; 804 /* 805 * GCC stores string constants in read-only memory, but 806 * Var_Subst will want to write this thing, so store it 807 * in an array 808 */ 809 static char VPATH[] = "${VPATH}"; 810 811 vpath = Var_Subst(NULL, VPATH, VAR_CMD, FALSE); 812 path = vpath; 813 do { 814 /* skip to end of directory */ 815 for (cp = path; *cp != ':' && *cp != '\0'; cp++) 816 continue; 817 /* Save terminator character so know when to stop */ 818 savec = *cp; 819 *cp = '\0'; 820 /* Add directory to search path */ 821 Dir_AddDir(&dirSearchPath, path); 822 *cp = savec; 823 path = cp + 1; 824 } while (savec == ':'); 825 free(vpath); 826 } 827 828 /* 829 * Now that all search paths have been read for suffixes et al, it's 830 * time to add the default search path to their lists... 831 */ 832 Suff_DoPaths(); 833 834 /* print the initial graph, if the user requested it */ 835 if (DEBUG(GRAPH1)) 836 Targ_PrintGraph(1); 837 838 /* print the values of any variables requested by the user */ 839 if (!Lst_IsEmpty(&variables)) { 840 LstNode *ln; 841 842 for (ln = Lst_First(&variables); ln != NULL; 843 ln = Lst_Succ(ln)) { 844 char *value; 845 if (expandVars) { 846 p1 = emalloc(strlen(Lst_Datum(ln)) + 1 + 3); 847 /* This sprintf is safe, because of the malloc above */ 848 sprintf(p1, "${%s}", (char *)Lst_Datum(ln)); 849 value = Var_Subst(NULL, p1, VAR_GLOBAL, FALSE); 850 } else { 851 value = Var_Value(Lst_Datum(ln), 852 VAR_GLOBAL, &p1); 853 } 854 printf("%s\n", value ? value : ""); 855 if (p1) 856 free(p1); 857 } 858 } else { 859 860 /* 861 * Have now read the entire graph and need to make a list of targets 862 * to create. If none was given on the command line, we consult the 863 * parsing module to find the main target(s) to create. 864 */ 865 Lst targs = Lst_Initializer(targs); 866 867 if (Lst_IsEmpty(&create)) 868 Parse_MainName(&targs); 869 else 870 Targ_FindList(&targs, &create, TARG_CREATE); 871 872 if (!compatMake) { 873 /* 874 * Initialize job module before traversing the graph, now that 875 * any .BEGIN and .END targets have been read. This is done 876 * only if the -q flag wasn't given (to prevent the .BEGIN from 877 * being executed should it exist). 878 */ 879 if (!queryFlag) { 880 Job_Init(maxJobs); 881 jobsRunning = TRUE; 882 } 883 884 /* Traverse the graph, checking on all the targets */ 885 outOfDate = Make_Run(&targs); 886 } else { 887 /* 888 * Compat_Init will take care of creating all the targets as 889 * well as initializing the module. 890 */ 891 Compat_Run(&targs); 892 outOfDate = 0; 893 } 894 Lst_Destroy(&targs, NOFREE); 895 } 896 897 Lst_Destroy(&variables, free); 898 Lst_Destroy(&makefiles, free); 899 Lst_Destroy(&create, free); 900 901 /* print the graph now it's been processed if the user requested it */ 902 if (DEBUG(GRAPH2)) 903 Targ_PrintGraph(2); 904 905 if (queryFlag && outOfDate) 906 return (1); 907 else 908 return (0); 909} 910 911/*- 912 * ReadMakefile -- 913 * Open and parse the given makefile. 914 * 915 * Results: 916 * TRUE if ok. FALSE if couldn't open file. 917 * 918 * Side Effects: 919 * lots 920 */ 921static Boolean 922ReadMakefile(const void *p, const void *q __unused) 923{ 924 char *fname; /* makefile to read */ 925 FILE *stream; 926 char *name, path[MAXPATHLEN]; 927 char *MAKEFILE; 928 int setMAKEFILE; 929 930 /* XXX - remove this once constification is done */ 931 fname = estrdup(p); 932 933 if (!strcmp(fname, "-")) { 934 Parse_File("(stdin)", stdin); 935 Var_Set("MAKEFILE", "", VAR_GLOBAL); 936 } else { 937 setMAKEFILE = strcmp(fname, ".depend"); 938 939 /* if we've chdir'd, rebuild the path name */ 940 if (curdir != objdir && *fname != '/') { 941 snprintf(path, MAXPATHLEN, "%s/%s", curdir, fname); 942 /* 943 * XXX The realpath stuff breaks relative includes 944 * XXX in some cases. The problem likely is in 945 * XXX parse.c where it does special things in 946 * XXX ParseDoInclude if the file is relateive 947 * XXX or absolute and not a system file. There 948 * XXX it assumes that if the current file that's 949 * XXX being included is absolute, that any files 950 * XXX that it includes shouldn't do the -I path 951 * XXX stuff, which is inconsistant with historical 952 * XXX behavior. However, I can't pentrate the mists 953 * XXX further, so I'm putting this workaround in 954 * XXX here until such time as the underlying bug 955 * XXX can be fixed. 956 */ 957#if THIS_BREAKS_THINGS 958 if (realpath(path, path) != NULL && 959 (stream = fopen(path, "r")) != NULL) { 960 MAKEFILE = fname; 961 fname = path; 962 goto found; 963 } 964 } else if (realpath(fname, path) != NULL) { 965 MAKEFILE = fname; 966 fname = path; 967 if ((stream = fopen(fname, "r")) != NULL) 968 goto found; 969 } 970#else 971 if ((stream = fopen(path, "r")) != NULL) { 972 MAKEFILE = fname; 973 fname = path; 974 goto found; 975 } 976 } else { 977 MAKEFILE = fname; 978 if ((stream = fopen(fname, "r")) != NULL) 979 goto found; 980 } 981#endif 982 /* look in -I and system include directories. */ 983 name = Dir_FindFile(fname, &parseIncPath); 984 if (!name) 985 name = Dir_FindFile(fname, &sysIncPath); 986 if (!name || !(stream = fopen(name, "r"))) 987 return (FALSE); 988 MAKEFILE = fname = name; 989 /* 990 * set the MAKEFILE variable desired by System V fans -- the 991 * placement of the setting here means it gets set to the last 992 * makefile specified, as it is set by SysV make. 993 */ 994found: 995 if (setMAKEFILE) 996 Var_Set("MAKEFILE", MAKEFILE, VAR_GLOBAL); 997 Parse_File(fname, stream); 998 fclose(stream); 999 } 1000 return (TRUE); 1001} 1002 1003/*- 1004 * Cmd_Exec -- 1005 * Execute the command in cmd, and return the output of that command 1006 * in a string. 1007 * 1008 * Results: 1009 * A string containing the output of the command, or the empty string 1010 * If error is not NULL, it contains the reason for the command failure 1011 * 1012 * Side Effects: 1013 * The string must be freed by the caller. 1014 */ 1015char * 1016Cmd_Exec(char *cmd, char **error) 1017{ 1018 char *args[4]; /* Args for invoking the shell */ 1019 int fds[2]; /* Pipe streams */ 1020 int cpid; /* Child PID */ 1021 int pid; /* PID from wait() */ 1022 char *res; /* result */ 1023 int status; /* command exit status */ 1024 Buffer *buf; /* buffer to store the result */ 1025 char *cp; 1026 size_t blen; 1027 ssize_t rcnt; 1028 1029 *error = NULL; 1030 1031 if (shellPath == NULL) 1032 Shell_Init(); 1033 /* 1034 * Set up arguments for shell 1035 */ 1036 args[0] = shellName; 1037 args[1] = "-c"; 1038 args[2] = cmd; 1039 args[3] = NULL; 1040 1041 /* 1042 * Open a pipe for fetching its output 1043 */ 1044 if (pipe(fds) == -1) { 1045 *error = "Couldn't create pipe for \"%s\""; 1046 goto bad; 1047 } 1048 1049 /* 1050 * Fork 1051 */ 1052 switch (cpid = vfork()) { 1053 case 0: 1054 /* 1055 * Close input side of pipe 1056 */ 1057 close(fds[0]); 1058 1059 /* 1060 * Duplicate the output stream to the shell's output, then 1061 * shut the extra thing down. Note we don't fetch the error 1062 * stream...why not? Why? 1063 */ 1064 dup2(fds[1], 1); 1065 close(fds[1]); 1066 1067 execv(shellPath, args); 1068 _exit(1); 1069 /*NOTREACHED*/ 1070 1071 case -1: 1072 *error = "Couldn't exec \"%s\""; 1073 goto bad; 1074 1075 default: 1076 /* 1077 * No need for the writing half 1078 */ 1079 close(fds[1]); 1080 1081 buf = Buf_Init(MAKE_BSIZE); 1082 1083 do { 1084 char result[BUFSIZ]; 1085 rcnt = read(fds[0], result, sizeof(result)); 1086 if (rcnt != -1) 1087 Buf_AddBytes(buf, (size_t)rcnt, (Byte *)result); 1088 } while (rcnt > 0 || (rcnt == -1 && errno == EINTR)); 1089 /* 1090 * Close the input side of the pipe. 1091 */ 1092 close(fds[0]); 1093 1094 /* 1095 * Wait for the process to exit. 1096 */ 1097 while (((pid = wait(&status)) != cpid) && (pid >= 0)) 1098 continue; 1099 1100 if (rcnt == -1) 1101 *error = "Error reading shell's output for \"%s\""; 1102 1103 res = (char *)Buf_GetAll(buf, &blen); 1104 Buf_Destroy(buf, FALSE); 1105 1106 if (status) 1107 *error = "\"%s\" returned non-zero status"; 1108 1109 /* 1110 * Null-terminate the result, convert newlines to spaces and 1111 * install it in the variable. 1112 */ 1113 res[blen] = '\0'; 1114 cp = &res[blen] - 1; 1115 1116 if (*cp == '\n') { 1117 /* 1118 * A final newline is just stripped 1119 */ 1120 *cp-- = '\0'; 1121 } 1122 while (cp >= res) { 1123 if (*cp == '\n') { 1124 *cp = ' '; 1125 } 1126 cp--; 1127 } 1128 break; 1129 } 1130 return (res); 1131bad: 1132 res = emalloc(1); 1133 *res = '\0'; 1134 return (res); 1135} 1136 1137/* 1138 * usage -- 1139 * exit with usage message 1140 */ 1141static void 1142usage(void) 1143{ 1144 fprintf(stderr, "%s\n%s\n%s\n", 1145"usage: make [-BPSXeiknqrstv] [-C directory] [-D variable] [-d flags]", 1146" [-E variable] [-f makefile] [-I directory] [-j max_jobs]", 1147" [-m directory] [-V variable] [variable=value] [target ...]"); 1148 exit(2); 1149} 1150