main.c revision 93056
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#include <sys/cdefs.h> 43__COPYRIGHT("@(#) Copyright (c) 1988, 1989, 1990, 1993 The Regents of the University of California. All rights reserved."); 44__RCSID("$FreeBSD: head/usr.bin/make/main.c 93056 2002-03-23 23:30:30Z imp $"); 45#endif /* not lint */ 46 47/*- 48 * main.c -- 49 * The main file for this entire program. Exit routines etc 50 * reside here. 51 * 52 * Utility functions defined in this file: 53 * Main_ParseArgLine Takes a line of arguments, breaks them and 54 * treats them as if they were given when first 55 * invoked. Used by the parse module to implement 56 * the .MFLAGS target. 57 * 58 * Error Print a tagged error message. The global 59 * MAKE variable must have been defined. This 60 * takes a format string and two optional 61 * arguments for it. 62 * 63 * Fatal Print an error message and exit. Also takes 64 * a format string and two arguments. 65 * 66 * Punt Aborts all jobs and exits with a message. Also 67 * takes a format string and two arguments. 68 * 69 * Finish Finish things up by printing the number of 70 * errors which occured, as passed to it, and 71 * exiting. 72 */ 73 74#include <sys/types.h> 75#include <sys/time.h> 76#include <sys/param.h> 77#include <sys/resource.h> 78#include <sys/signal.h> 79#include <sys/stat.h> 80#if defined(__i386__) 81#include <sys/sysctl.h> 82#endif 83#ifndef MACHINE 84#include <sys/utsname.h> 85#endif 86#include <sys/wait.h> 87#include <err.h> 88#include <stdlib.h> 89#include <errno.h> 90#include <fcntl.h> 91#include <stdio.h> 92#include <sysexits.h> 93#include <stdarg.h> 94#include <unistd.h> 95#include "make.h" 96#include "hash.h" 97#include "dir.h" 98#include "job.h" 99#include "pathnames.h" 100 101#ifndef DEFMAXLOCAL 102#define DEFMAXLOCAL DEFMAXJOBS 103#endif /* DEFMAXLOCAL */ 104 105#define MAKEFLAGS ".MAKEFLAGS" 106 107Lst create; /* Targets to be made */ 108time_t now; /* Time at start of make */ 109GNode *DEFAULT; /* .DEFAULT node */ 110Boolean allPrecious; /* .PRECIOUS given on line by itself */ 111 112static Boolean noBuiltins; /* -r flag */ 113static Lst makefiles; /* ordered list of makefiles to read */ 114static Boolean printVars; /* print value of one or more vars */ 115static Boolean expandVars; /* fully expand printed variables */ 116static Lst variables; /* list of variables to print */ 117int maxJobs; /* -j argument */ 118static Boolean forceJobs; /* -j argument given */ 119static int maxLocal; /* -L argument */ 120Boolean compatMake; /* -B argument */ 121Boolean debug; /* -d flag */ 122Boolean noExecute; /* -n flag */ 123Boolean keepgoing; /* -k flag */ 124Boolean queryFlag; /* -q flag */ 125Boolean touchFlag; /* -t flag */ 126Boolean usePipes; /* !-P flag */ 127Boolean ignoreErrors; /* -i flag */ 128Boolean beSilent; /* -s flag */ 129Boolean beVerbose; /* -v flag */ 130Boolean oldVars; /* variable substitution style */ 131Boolean checkEnvFirst; /* -e flag */ 132Lst envFirstVars; /* (-E) vars to override from env */ 133static Boolean jobsRunning; /* TRUE if the jobs might be running */ 134 135static void MainParseArgs(int, char **); 136char * chdir_verify_path(char *, char *); 137static int ReadMakefile(void *, void *); 138static void usage(void); 139 140static char *curdir; /* startup directory */ 141static char *objdir; /* where we chdir'ed to */ 142 143/*- 144 * MainParseArgs -- 145 * Parse a given argument vector. Called from main() and from 146 * Main_ParseArgLine() when the .MAKEFLAGS target is used. 147 * 148 * XXX: Deal with command line overriding .MAKEFLAGS in makefile 149 * 150 * Results: 151 * None 152 * 153 * Side Effects: 154 * Various global and local flags will be set depending on the flags 155 * given 156 */ 157static void 158MainParseArgs(argc, argv) 159 int argc; 160 char **argv; 161{ 162 char *p; 163 int c; 164 165 optind = 1; /* since we're called more than once */ 166#ifdef REMOTE 167# define OPTFLAGS "BD:E:I:L:PSV:Xd:ef:ij:km:nqrstv" 168#else 169# define OPTFLAGS "BD:E:I:PSV:Xd:ef:ij:km:nqrstv" 170#endif 171rearg: while((c = getopt(argc, argv, OPTFLAGS)) != -1) { 172 switch(c) { 173 case 'D': 174 Var_Set(optarg, "1", VAR_GLOBAL); 175 Var_Append(MAKEFLAGS, "-D", VAR_GLOBAL); 176 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); 177 break; 178 case 'I': 179 Parse_AddIncludeDir(optarg); 180 Var_Append(MAKEFLAGS, "-I", VAR_GLOBAL); 181 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); 182 break; 183 case 'V': 184 printVars = TRUE; 185 (void)Lst_AtEnd(variables, (void *)optarg); 186 Var_Append(MAKEFLAGS, "-V", VAR_GLOBAL); 187 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); 188 break; 189 case 'X': 190 expandVars = FALSE; 191 break; 192 case 'B': 193 compatMake = TRUE; 194 Var_Append(MAKEFLAGS, "-B", VAR_GLOBAL); 195 break; 196#ifdef REMOTE 197 case 'L': { 198 char *endptr; 199 200 maxLocal = strtol(optarg, &endptr, 10); 201 if (maxLocal < 0 || *endptr != '\0') { 202 warnx("illegal number, -L argument -- %s", 203 optarg); 204 usage(); 205 } 206 Var_Append(MAKEFLAGS, "-L", VAR_GLOBAL); 207 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); 208 break; 209 } 210#endif 211 case 'P': 212 usePipes = FALSE; 213 Var_Append(MAKEFLAGS, "-P", VAR_GLOBAL); 214 break; 215 case 'S': 216 keepgoing = FALSE; 217 Var_Append(MAKEFLAGS, "-S", VAR_GLOBAL); 218 break; 219 case 'd': { 220 char *modules = optarg; 221 222 for (; *modules; ++modules) 223 switch (*modules) { 224 case 'A': 225 debug = ~0; 226 break; 227 case 'a': 228 debug |= DEBUG_ARCH; 229 break; 230 case 'c': 231 debug |= DEBUG_COND; 232 break; 233 case 'd': 234 debug |= DEBUG_DIR; 235 break; 236 case 'f': 237 debug |= DEBUG_FOR; 238 break; 239 case 'g': 240 if (modules[1] == '1') { 241 debug |= DEBUG_GRAPH1; 242 ++modules; 243 } 244 else if (modules[1] == '2') { 245 debug |= DEBUG_GRAPH2; 246 ++modules; 247 } 248 break; 249 case 'j': 250 debug |= DEBUG_JOB; 251 break; 252 case 'l': 253 debug |= DEBUG_LOUD; 254 break; 255 case 'm': 256 debug |= DEBUG_MAKE; 257 break; 258 case 's': 259 debug |= DEBUG_SUFF; 260 break; 261 case 't': 262 debug |= DEBUG_TARG; 263 break; 264 case 'v': 265 debug |= DEBUG_VAR; 266 break; 267 default: 268 warnx("illegal argument to d option -- %c", *modules); 269 usage(); 270 } 271 Var_Append(MAKEFLAGS, "-d", VAR_GLOBAL); 272 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); 273 break; 274 } 275 case 'E': 276 p = malloc(strlen(optarg) + 1); 277 if (!p) 278 Punt("make: cannot allocate memory."); 279 (void)strcpy(p, optarg); 280 (void)Lst_AtEnd(envFirstVars, (void *)p); 281 Var_Append(MAKEFLAGS, "-E", VAR_GLOBAL); 282 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); 283 break; 284 case 'e': 285 checkEnvFirst = TRUE; 286 Var_Append(MAKEFLAGS, "-e", VAR_GLOBAL); 287 break; 288 case 'f': 289 (void)Lst_AtEnd(makefiles, (void *)optarg); 290 break; 291 case 'i': 292 ignoreErrors = TRUE; 293 Var_Append(MAKEFLAGS, "-i", VAR_GLOBAL); 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#ifndef REMOTE 306 maxLocal = maxJobs; 307#endif 308 Var_Append(MAKEFLAGS, "-j", VAR_GLOBAL); 309 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); 310 break; 311 } 312 case 'k': 313 keepgoing = TRUE; 314 Var_Append(MAKEFLAGS, "-k", VAR_GLOBAL); 315 break; 316 case 'm': 317 Dir_AddDir(sysIncPath, optarg); 318 Var_Append(MAKEFLAGS, "-m", VAR_GLOBAL); 319 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); 320 break; 321 case 'n': 322 noExecute = TRUE; 323 Var_Append(MAKEFLAGS, "-n", VAR_GLOBAL); 324 break; 325 case 'q': 326 queryFlag = TRUE; 327 /* Kind of nonsensical, wot? */ 328 Var_Append(MAKEFLAGS, "-q", VAR_GLOBAL); 329 break; 330 case 'r': 331 noBuiltins = TRUE; 332 Var_Append(MAKEFLAGS, "-r", VAR_GLOBAL); 333 break; 334 case 's': 335 beSilent = TRUE; 336 Var_Append(MAKEFLAGS, "-s", VAR_GLOBAL); 337 break; 338 case 't': 339 touchFlag = TRUE; 340 Var_Append(MAKEFLAGS, "-t", VAR_GLOBAL); 341 break; 342 case 'v': 343 beVerbose = TRUE; 344 Var_Append(MAKEFLAGS, "-v", VAR_GLOBAL); 345 break; 346 default: 347 case '?': 348 usage(); 349 } 350 } 351 352 oldVars = TRUE; 353 354 /* 355 * See if the rest of the arguments are variable assignments and 356 * perform them if so. Else take them to be targets and stuff them 357 * on the end of the "create" list. 358 */ 359 for (argv += optind, argc -= optind; *argv; ++argv, --argc) 360 if (Parse_IsVar(*argv)) 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 (void)Lst_AtEnd(create, (void *)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(line) 393 char *line; /* Line to fracture */ 394{ 395 char **argv; /* Manufactured argument vector */ 396 int argc; /* Number of arguments in argv */ 397 398 if (line == NULL) 399 return; 400 for (; *line == ' '; ++line) 401 continue; 402 if (!*line) 403 return; 404 405 argv = brk_string(line, &argc, TRUE); 406 MainParseArgs(argc, argv); 407} 408 409char * 410chdir_verify_path(path, obpath) 411 char *path; 412 char *obpath; 413{ 414 struct stat sb; 415 416 if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) { 417 if (chdir(path) == -1 || getcwd(obpath, MAXPATHLEN) == NULL) { 418 warn("warning: %s", path); 419 return 0; 420 } 421 return obpath; 422 } 423 424 return 0; 425} 426 427 428/*- 429 * main -- 430 * The main function, for obvious reasons. Initializes variables 431 * and a few modules, then parses the arguments give it in the 432 * environment and on the command line. Reads the system makefile 433 * followed by either Makefile, makefile or the file given by the 434 * -f argument. Sets the .MAKEFLAGS PMake variable based on all the 435 * flags it has received by then uses either the Make or the Compat 436 * module to create the initial list of targets. 437 * 438 * Results: 439 * If -q was given, exits -1 if anything was out-of-date. Else it exits 440 * 0. 441 * 442 * Side Effects: 443 * The program exits when done. Targets are created. etc. etc. etc. 444 */ 445int 446main(argc, argv) 447 int argc; 448 char **argv; 449{ 450 Lst targs; /* target nodes to create -- passed to Make_Init */ 451 Boolean outOfDate = TRUE; /* FALSE if all targets up to date */ 452 struct stat sa; 453 char *p, *p1, *path, *pathp; 454 char mdpath[MAXPATHLEN]; 455 char obpath[MAXPATHLEN]; 456 char cdpath[MAXPATHLEN]; 457 char *machine = getenv("MACHINE"); 458 char *machine_arch = getenv("MACHINE_ARCH"); 459 char *machine_cpu = getenv("MACHINE_CPU"); 460 Lst sysMkPath; /* Path of sys.mk */ 461 char *cp = NULL, *start; 462 /* avoid faults on read-only strings */ 463 static char syspath[] = _PATH_DEFSYSPATH; 464 465#if DEFSHELL == 2 466 /* 467 * Turn off ENV to make ksh happier. 468 */ 469 unsetenv("ENV"); 470#endif 471 472#ifdef RLIMIT_NOFILE 473 /* 474 * get rid of resource limit on file descriptors 475 */ 476 { 477 struct rlimit rl; 478 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 && 479 rl.rlim_cur != rl.rlim_max) { 480 rl.rlim_cur = rl.rlim_max; 481 (void) setrlimit(RLIMIT_NOFILE, &rl); 482 } 483 } 484#endif 485 /* 486 * Find where we are... 487 * All this code is so that we know where we are when we start up 488 * on a different machine with pmake. 489 */ 490 curdir = cdpath; 491 if (getcwd(curdir, MAXPATHLEN) == NULL) 492 err(2, NULL); 493 494 if (stat(curdir, &sa) == -1) 495 err(2, "%s", curdir); 496 497#if defined(__i386__) && defined(__FreeBSD_version) && \ 498 __FreeBSD_version > 300003 499 /* 500 * PC-98 kernel sets the `i386' string to the utsname.machine and 501 * it cannot be distinguished from IBM-PC by uname(3). Therefore, 502 * we check machine.ispc98 and adjust the machine variable before 503 * using usname(3) below. 504 * NOTE: machdep.ispc98 was defined on 1998/8/31. At that time, 505 * __FreeBSD_version was defined as 300003. So, this check can 506 * safely be done with any kernel with version > 300003. 507 */ 508 if (!machine) { 509 int ispc98; 510 size_t len; 511 512 len = sizeof(ispc98); 513 if (!sysctlbyname("machdep.ispc98", &ispc98, &len, NULL, 0)) { 514 if (ispc98) 515 machine = "pc98"; 516 } 517 } 518#endif 519 520 /* 521 * Get the name of this type of MACHINE from utsname 522 * so we can share an executable for similar machines. 523 * (i.e. m68k: amiga hp300, mac68k, sun3, ...) 524 * 525 * Note that while MACHINE is decided at run-time, 526 * MACHINE_ARCH is always known at compile time. 527 */ 528 if (!machine) { 529#ifndef MACHINE 530 struct utsname utsname; 531 532 if (uname(&utsname) == -1) { 533 perror("make: uname"); 534 exit(2); 535 } 536 machine = utsname.machine; 537#else 538 machine = MACHINE; 539#endif 540 } 541 542 if (!machine_arch) { 543#ifndef MACHINE_ARCH 544 machine_arch = "unknown"; 545#else 546 machine_arch = MACHINE_ARCH; 547#endif 548 } 549 550 /* 551 * Set machine_cpu to the minumum supported CPU revision based 552 * on the target architecture, if not already set. 553 */ 554 if (!machine_cpu) { 555 if (!strcmp(machine_arch, "i386")) 556 machine_cpu = "i386"; 557 else if (!strcmp(machine_arch, "alpha")) 558 machine_cpu = "ev4"; 559 else 560 machine_cpu = "unknown"; 561 } 562 563 /* 564 * The object directory location is determined using the 565 * following order of preference: 566 * 567 * 1. MAKEOBJDIRPREFIX`cwd` 568 * 2. MAKEOBJDIR 569 * 3. _PATH_OBJDIR.${MACHINE} 570 * 4. _PATH_OBJDIR 571 * 5. _PATH_OBJDIRPREFIX`cwd` 572 * 573 * If one of the first two fails, use the current directory. 574 * If the remaining three all fail, use the current directory. 575 * 576 * Once things are initted, 577 * have to add the original directory to the search path, 578 * and modify the paths for the Makefiles apropriately. The 579 * current directory is also placed as a variable for make scripts. 580 */ 581 if (!(pathp = getenv("MAKEOBJDIRPREFIX"))) { 582 if (!(path = getenv("MAKEOBJDIR"))) { 583 path = _PATH_OBJDIR; 584 pathp = _PATH_OBJDIRPREFIX; 585 (void) snprintf(mdpath, MAXPATHLEN, "%s.%s", 586 path, machine); 587 if (!(objdir = chdir_verify_path(mdpath, obpath))) 588 if (!(objdir=chdir_verify_path(path, obpath))) { 589 (void) snprintf(mdpath, MAXPATHLEN, 590 "%s%s", pathp, curdir); 591 if (!(objdir=chdir_verify_path(mdpath, 592 obpath))) 593 objdir = curdir; 594 } 595 } 596 else if (!(objdir = chdir_verify_path(path, obpath))) 597 objdir = curdir; 598 } 599 else { 600 (void) snprintf(mdpath, MAXPATHLEN, "%s%s", pathp, curdir); 601 if (!(objdir = chdir_verify_path(mdpath, obpath))) 602 objdir = curdir; 603 } 604 605 create = Lst_Init(FALSE); 606 makefiles = Lst_Init(FALSE); 607 envFirstVars = Lst_Init(FALSE); 608 printVars = FALSE; 609 expandVars = TRUE; 610 variables = Lst_Init(FALSE); 611 beSilent = FALSE; /* Print commands as executed */ 612 ignoreErrors = FALSE; /* Pay attention to non-zero returns */ 613 noExecute = FALSE; /* Execute all commands */ 614 keepgoing = FALSE; /* Stop on error */ 615 allPrecious = FALSE; /* Remove targets when interrupted */ 616 queryFlag = FALSE; /* This is not just a check-run */ 617 noBuiltins = FALSE; /* Read the built-in rules */ 618 touchFlag = FALSE; /* Actually update targets */ 619 usePipes = TRUE; /* Catch child output in pipes */ 620 debug = 0; /* No debug verbosity, please. */ 621 jobsRunning = FALSE; 622 623 maxLocal = DEFMAXLOCAL; /* Set default local max concurrency */ 624#ifdef REMOTE 625 maxJobs = DEFMAXJOBS; /* Set default max concurrency */ 626#else 627 maxJobs = maxLocal; 628#endif 629 forceJobs = FALSE; /* No -j flag */ 630 compatMake = FALSE; /* No compat mode */ 631 632 633 /* 634 * Initialize the parsing, directory and variable modules to prepare 635 * for the reading of inclusion paths and variable settings on the 636 * command line 637 */ 638 Dir_Init(); /* Initialize directory structures so -I flags 639 * can be processed correctly */ 640 Parse_Init(); /* Need to initialize the paths of #include 641 * directories */ 642 Var_Init(); /* As well as the lists of variables for 643 * parsing arguments */ 644 str_init(); 645 if (objdir != curdir) 646 Dir_AddDir(dirSearchPath, curdir); 647 Var_Set(".CURDIR", curdir, VAR_GLOBAL); 648 Var_Set(".OBJDIR", objdir, VAR_GLOBAL); 649 650 /* 651 * Initialize various variables. 652 * MAKE also gets this name, for compatibility 653 * .MAKEFLAGS gets set to the empty string just in case. 654 * MFLAGS also gets initialized empty, for compatibility. 655 */ 656 Var_Set("MAKE", argv[0], VAR_GLOBAL); 657 Var_Set(MAKEFLAGS, "", VAR_GLOBAL); 658 Var_Set("MFLAGS", "", VAR_GLOBAL); 659 Var_Set("MACHINE", machine, VAR_GLOBAL); 660 Var_Set("MACHINE_ARCH", machine_arch, VAR_GLOBAL); 661 Var_Set("MACHINE_CPU", machine_cpu, VAR_GLOBAL); 662 663 /* 664 * First snag any flags out of the MAKE environment variable. 665 * (Note this is *not* MAKEFLAGS since /bin/make uses that and it's 666 * in a different format). 667 */ 668#ifdef POSIX 669 Main_ParseArgLine(getenv("MAKEFLAGS")); 670#else 671 Main_ParseArgLine(getenv("MAKE")); 672#endif 673 674 MainParseArgs(argc, argv); 675 676 /* 677 * Be compatible if user did not specify -j and did not explicitly 678 * turned compatibility on 679 */ 680 if (!compatMake && !forceJobs) 681 compatMake = TRUE; 682 683 /* 684 * Initialize archive, target and suffix modules in preparation for 685 * parsing the makefile(s) 686 */ 687 Arch_Init(); 688 Targ_Init(); 689 Suff_Init(); 690 691 DEFAULT = NULL; 692 (void)time(&now); 693 694 /* 695 * Set up the .TARGETS variable to contain the list of targets to be 696 * created. If none specified, make the variable empty -- the parser 697 * will fill the thing in with the default or .MAIN target. 698 */ 699 if (!Lst_IsEmpty(create)) { 700 LstNode ln; 701 702 for (ln = Lst_First(create); ln != NULL; 703 ln = Lst_Succ(ln)) { 704 char *name = (char *)Lst_Datum(ln); 705 706 Var_Append(".TARGETS", name, VAR_GLOBAL); 707 } 708 } else 709 Var_Set(".TARGETS", "", VAR_GLOBAL); 710 711 712 /* 713 * If no user-supplied system path was given (through the -m option) 714 * add the directories from the DEFSYSPATH (more than one may be given 715 * as dir1:...:dirn) to the system include path. 716 */ 717 if (Lst_IsEmpty(sysIncPath)) { 718 for (start = syspath; *start != '\0'; start = cp) { 719 for (cp = start; *cp != '\0' && *cp != ':'; cp++) 720 continue; 721 if (*cp == '\0') { 722 Dir_AddDir(sysIncPath, start); 723 } else { 724 *cp++ = '\0'; 725 Dir_AddDir(sysIncPath, start); 726 } 727 } 728 } 729 730 /* 731 * Read in the built-in rules first, followed by the specified 732 * makefile, if it was (makefile != (char *) NULL), or the default 733 * Makefile and makefile, in that order, if it wasn't. 734 */ 735 if (!noBuiltins) { 736 LstNode ln; 737 738 sysMkPath = Lst_Init (FALSE); 739 Dir_Expand (_PATH_DEFSYSMK, sysIncPath, sysMkPath); 740 if (Lst_IsEmpty(sysMkPath)) 741 Fatal("make: no system rules (%s).", _PATH_DEFSYSMK); 742 ln = Lst_Find(sysMkPath, (void *)NULL, ReadMakefile); 743 if (ln != NULL) 744 Fatal("make: cannot open %s.", (char *)Lst_Datum(ln)); 745 } 746 747 if (!Lst_IsEmpty(makefiles)) { 748 LstNode ln; 749 750 ln = Lst_Find(makefiles, (void *)NULL, ReadMakefile); 751 if (ln != NULL) 752 Fatal("make: cannot open %s.", (char *)Lst_Datum(ln)); 753 } else if (!ReadMakefile("makefile", NULL)) 754 (void)ReadMakefile("Makefile", NULL); 755 756 (void)ReadMakefile(".depend", NULL); 757 758 Var_Append("MFLAGS", Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1), VAR_GLOBAL); 759 efree(p1); 760 761 /* Install all the flags into the MAKE envariable. */ 762 if (((p = Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1)) != NULL) && *p) 763#ifdef POSIX 764 setenv("MAKEFLAGS", p, 1); 765#else 766 setenv("MAKE", p, 1); 767#endif 768 efree(p1); 769 770 /* 771 * For compatibility, look at the directories in the VPATH variable 772 * and add them to the search path, if the variable is defined. The 773 * variable's value is in the same format as the PATH envariable, i.e. 774 * <directory>:<directory>:<directory>... 775 */ 776 if (Var_Exists("VPATH", VAR_CMD)) { 777 char *vpath, *path, *cp, savec; 778 /* 779 * GCC stores string constants in read-only memory, but 780 * Var_Subst will want to write this thing, so store it 781 * in an array 782 */ 783 static char VPATH[] = "${VPATH}"; 784 785 vpath = Var_Subst(NULL, VPATH, VAR_CMD, FALSE); 786 path = vpath; 787 do { 788 /* skip to end of directory */ 789 for (cp = path; *cp != ':' && *cp != '\0'; cp++) 790 continue; 791 /* Save terminator character so know when to stop */ 792 savec = *cp; 793 *cp = '\0'; 794 /* Add directory to search path */ 795 Dir_AddDir(dirSearchPath, path); 796 *cp = savec; 797 path = cp + 1; 798 } while (savec == ':'); 799 (void)free(vpath); 800 } 801 802 /* 803 * Now that all search paths have been read for suffixes et al, it's 804 * time to add the default search path to their lists... 805 */ 806 Suff_DoPaths(); 807 808 /* print the initial graph, if the user requested it */ 809 if (DEBUG(GRAPH1)) 810 Targ_PrintGraph(1); 811 812 /* print the values of any variables requested by the user */ 813 if (printVars) { 814 LstNode ln; 815 816 for (ln = Lst_First(variables); ln != NULL; 817 ln = Lst_Succ(ln)) { 818 char *value; 819 if (expandVars) { 820 p1 = malloc(strlen((char *)Lst_Datum(ln)) + 1 + 3); 821 if (!p1) 822 Punt("make: cannot allocate memory."); 823 /* This sprintf is safe, because of the malloc above */ 824 (void)sprintf(p1, "${%s}", (char *)Lst_Datum(ln)); 825 value = Var_Subst(NULL, p1, VAR_GLOBAL, FALSE); 826 } else { 827 value = Var_Value((char *)Lst_Datum(ln), 828 VAR_GLOBAL, &p1); 829 } 830 printf("%s\n", value ? value : ""); 831 if (p1) 832 free(p1); 833 } 834 } 835 836 /* 837 * Have now read the entire graph and need to make a list of targets 838 * to create. If none was given on the command line, we consult the 839 * parsing module to find the main target(s) to create. 840 */ 841 if (Lst_IsEmpty(create)) 842 targs = Parse_MainName(); 843 else 844 targs = Targ_FindList(create, TARG_CREATE); 845 846 if (!compatMake && !printVars) { 847 /* 848 * Initialize job module before traversing the graph, now that 849 * any .BEGIN and .END targets have been read. This is done 850 * only if the -q flag wasn't given (to prevent the .BEGIN from 851 * being executed should it exist). 852 */ 853 if (!queryFlag) { 854 if (maxLocal == -1) 855 maxLocal = maxJobs; 856 Job_Init(maxJobs, maxLocal); 857 jobsRunning = TRUE; 858 } 859 860 /* Traverse the graph, checking on all the targets */ 861 outOfDate = Make_Run(targs); 862 } else if (!printVars) { 863 /* 864 * Compat_Init will take care of creating all the targets as 865 * well as initializing the module. 866 */ 867 Compat_Run(targs); 868 } 869 870 Lst_Destroy(targs, NOFREE); 871 Lst_Destroy(variables, NOFREE); 872 Lst_Destroy(makefiles, NOFREE); 873 Lst_Destroy(create, (void (*)(void *)) free); 874 875 /* print the graph now it's been processed if the user requested it */ 876 if (DEBUG(GRAPH2)) 877 Targ_PrintGraph(2); 878 879 Suff_End(); 880 Targ_End(); 881 Arch_End(); 882 str_end(); 883 Var_End(); 884 Parse_End(); 885 Dir_End(); 886 887 if (queryFlag && outOfDate) 888 return(1); 889 else 890 return(0); 891} 892 893/*- 894 * ReadMakefile -- 895 * Open and parse the given makefile. 896 * 897 * Results: 898 * TRUE if ok. FALSE if couldn't open file. 899 * 900 * Side Effects: 901 * lots 902 */ 903static Boolean 904ReadMakefile(p, q) 905 void *p; 906 void *q; 907{ 908 char *fname = p; /* makefile to read */ 909 extern Lst parseIncPath; 910 FILE *stream; 911 char *name, path[MAXPATHLEN]; 912 913 if (!strcmp(fname, "-")) { 914 Parse_File("(stdin)", stdin); 915 Var_Set("MAKEFILE", "", VAR_GLOBAL); 916 } else { 917 /* if we've chdir'd, rebuild the path name */ 918 if (curdir != objdir && *fname != '/') { 919 (void)snprintf(path, MAXPATHLEN, "%s/%s", curdir, fname); 920 if ((stream = fopen(path, "r")) != NULL) { 921 fname = path; 922 goto found; 923 } 924 } else if ((stream = fopen(fname, "r")) != NULL) 925 goto found; 926 /* look in -I and system include directories. */ 927 name = Dir_FindFile(fname, parseIncPath); 928 if (!name) 929 name = Dir_FindFile(fname, sysIncPath); 930 if (!name || !(stream = fopen(name, "r"))) 931 return(FALSE); 932 fname = name; 933 /* 934 * set the MAKEFILE variable desired by System V fans -- the 935 * placement of the setting here means it gets set to the last 936 * makefile specified, as it is set by SysV make. 937 */ 938found: Var_Set("MAKEFILE", fname, VAR_GLOBAL); 939 Parse_File(fname, stream); 940 (void)fclose(stream); 941 } 942 return(TRUE); 943} 944 945/*- 946 * Cmd_Exec -- 947 * Execute the command in cmd, and return the output of that command 948 * in a string. 949 * 950 * Results: 951 * A string containing the output of the command, or the empty string 952 * If err is not NULL, it contains the reason for the command failure 953 * 954 * Side Effects: 955 * The string must be freed by the caller. 956 */ 957char * 958Cmd_Exec(cmd, err) 959 char *cmd; 960 char **err; 961{ 962 char *args[4]; /* Args for invoking the shell */ 963 int fds[2]; /* Pipe streams */ 964 int cpid; /* Child PID */ 965 int pid; /* PID from wait() */ 966 char *res; /* result */ 967 int status; /* command exit status */ 968 Buffer buf; /* buffer to store the result */ 969 char *cp; 970 int cc; 971 972 973 *err = NULL; 974 975 /* 976 * Set up arguments for shell 977 */ 978 args[0] = "sh"; 979 args[1] = "-c"; 980 args[2] = cmd; 981 args[3] = NULL; 982 983 /* 984 * Open a pipe for fetching its output 985 */ 986 if (pipe(fds) == -1) { 987 *err = "Couldn't create pipe for \"%s\""; 988 goto bad; 989 } 990 991 /* 992 * Fork 993 */ 994 switch (cpid = vfork()) { 995 case 0: 996 /* 997 * Close input side of pipe 998 */ 999 (void) close(fds[0]); 1000 1001 /* 1002 * Duplicate the output stream to the shell's output, then 1003 * shut the extra thing down. Note we don't fetch the error 1004 * stream...why not? Why? 1005 */ 1006 (void) dup2(fds[1], 1); 1007 (void) close(fds[1]); 1008 1009#if DEFSHELL == 1 1010 (void) execv("/bin/sh", args); 1011#elif DEFSHELL == 2 1012 (void) execv("/bin/ksh", args); 1013#else 1014#error "DEFSHELL must be 1 or 2." 1015#endif 1016 _exit(1); 1017 /*NOTREACHED*/ 1018 1019 case -1: 1020 *err = "Couldn't exec \"%s\""; 1021 goto bad; 1022 1023 default: 1024 /* 1025 * No need for the writing half 1026 */ 1027 (void) close(fds[1]); 1028 1029 buf = Buf_Init (MAKE_BSIZE); 1030 1031 do { 1032 char result[BUFSIZ]; 1033 cc = read(fds[0], result, sizeof(result)); 1034 if (cc > 0) 1035 Buf_AddBytes(buf, cc, (Byte *) result); 1036 } 1037 while (cc > 0 || (cc == -1 && errno == EINTR)); 1038 1039 /* 1040 * Close the input side of the pipe. 1041 */ 1042 (void) close(fds[0]); 1043 1044 /* 1045 * Wait for the process to exit. 1046 */ 1047 while(((pid = wait(&status)) != cpid) && (pid >= 0)) 1048 continue; 1049 1050 if (cc == -1) 1051 *err = "Error reading shell's output for \"%s\""; 1052 1053 res = (char *)Buf_GetAll (buf, &cc); 1054 Buf_Destroy (buf, FALSE); 1055 1056 if (status) 1057 *err = "\"%s\" returned non-zero status"; 1058 1059 /* 1060 * Null-terminate the result, convert newlines to spaces and 1061 * install it in the variable. 1062 */ 1063 res[cc] = '\0'; 1064 cp = &res[cc] - 1; 1065 1066 if (*cp == '\n') { 1067 /* 1068 * A final newline is just stripped 1069 */ 1070 *cp-- = '\0'; 1071 } 1072 while (cp >= res) { 1073 if (*cp == '\n') { 1074 *cp = ' '; 1075 } 1076 cp--; 1077 } 1078 break; 1079 } 1080 return res; 1081bad: 1082 res = emalloc(1); 1083 *res = '\0'; 1084 return res; 1085} 1086 1087/*- 1088 * Error -- 1089 * Print an error message given its format. 1090 * 1091 * Results: 1092 * None. 1093 * 1094 * Side Effects: 1095 * The message is printed. 1096 */ 1097/* VARARGS */ 1098void 1099Error(char *fmt, ...) 1100{ 1101 va_list ap; 1102 1103 va_start(ap, fmt); 1104 (void)vfprintf(stderr, fmt, ap); 1105 va_end(ap); 1106 (void)fprintf(stderr, "\n"); 1107 (void)fflush(stderr); 1108} 1109 1110/*- 1111 * Fatal -- 1112 * Produce a Fatal error message. If jobs are running, waits for them 1113 * to finish. 1114 * 1115 * Results: 1116 * None 1117 * 1118 * Side Effects: 1119 * The program exits 1120 */ 1121/* VARARGS */ 1122void 1123Fatal(char *fmt, ...) 1124{ 1125 va_list ap; 1126 1127 va_start(ap, fmt); 1128 if (jobsRunning) 1129 Job_Wait(); 1130 1131 (void)vfprintf(stderr, fmt, ap); 1132 va_end(ap); 1133 (void)fprintf(stderr, "\n"); 1134 (void)fflush(stderr); 1135 1136 if (DEBUG(GRAPH2)) 1137 Targ_PrintGraph(2); 1138 exit(2); /* Not 1 so -q can distinguish error */ 1139} 1140 1141/* 1142 * Punt -- 1143 * Major exception once jobs are being created. Kills all jobs, prints 1144 * a message and exits. 1145 * 1146 * Results: 1147 * None 1148 * 1149 * Side Effects: 1150 * All children are killed indiscriminately and the program Lib_Exits 1151 */ 1152/* VARARGS */ 1153void 1154Punt(char *fmt, ...) 1155{ 1156 va_list ap; 1157 1158 va_start(ap, fmt); 1159 (void)fprintf(stderr, "make: "); 1160 (void)vfprintf(stderr, fmt, ap); 1161 va_end(ap); 1162 (void)fprintf(stderr, "\n"); 1163 (void)fflush(stderr); 1164 1165 DieHorribly(); 1166} 1167 1168/*- 1169 * DieHorribly -- 1170 * Exit without giving a message. 1171 * 1172 * Results: 1173 * None 1174 * 1175 * Side Effects: 1176 * A big one... 1177 */ 1178void 1179DieHorribly() 1180{ 1181 if (jobsRunning) 1182 Job_AbortAll(); 1183 if (DEBUG(GRAPH2)) 1184 Targ_PrintGraph(2); 1185 exit(2); /* Not 1, so -q can distinguish error */ 1186} 1187 1188/* 1189 * Finish -- 1190 * Called when aborting due to errors in child shell to signal 1191 * abnormal exit. 1192 * 1193 * Results: 1194 * None 1195 * 1196 * Side Effects: 1197 * The program exits 1198 */ 1199void 1200Finish(errors) 1201 int errors; /* number of errors encountered in Make_Make */ 1202{ 1203 Fatal("%d error%s", errors, errors == 1 ? "" : "s"); 1204} 1205 1206/* 1207 * emalloc -- 1208 * malloc, but die on error. 1209 */ 1210void * 1211emalloc(len) 1212 size_t len; 1213{ 1214 void *p; 1215 1216 if ((p = malloc(len)) == NULL) 1217 enomem(); 1218 return(p); 1219} 1220 1221/* 1222 * estrdup -- 1223 * strdup, but die on error. 1224 */ 1225char * 1226estrdup(str) 1227 const char *str; 1228{ 1229 char *p; 1230 1231 if ((p = strdup(str)) == NULL) 1232 enomem(); 1233 return(p); 1234} 1235 1236/* 1237 * erealloc -- 1238 * realloc, but die on error. 1239 */ 1240void * 1241erealloc(ptr, size) 1242 void *ptr; 1243 size_t size; 1244{ 1245 if ((ptr = realloc(ptr, size)) == NULL) 1246 enomem(); 1247 return(ptr); 1248} 1249 1250/* 1251 * enomem -- 1252 * die when out of memory. 1253 */ 1254void 1255enomem() 1256{ 1257 err(2, NULL); 1258} 1259 1260/* 1261 * enunlink -- 1262 * Remove a file carefully, avoiding directories. 1263 */ 1264int 1265eunlink(file) 1266 const char *file; 1267{ 1268 struct stat st; 1269 1270 if (lstat(file, &st) == -1) 1271 return -1; 1272 1273 if (S_ISDIR(st.st_mode)) { 1274 errno = EISDIR; 1275 return -1; 1276 } 1277 return unlink(file); 1278} 1279 1280/* 1281 * usage -- 1282 * exit with usage message 1283 */ 1284static void 1285usage() 1286{ 1287 (void)fprintf(stderr, "%s\n%s\n%s\n", 1288"usage: make [-Beiknqrstv] [-D variable] [-d flags] [-E variable] [-f makefile]", 1289" [-I directory] [-j max_jobs] [-m directory] [-V variable]", 1290" [variable=value] [target ...]"); 1291 exit(2); 1292} 1293 1294 1295int 1296PrintAddr(a, b) 1297 void * a; 1298 void * b; 1299{ 1300 printf("%lx ", (unsigned long) a); 1301 return b ? 0 : 0; 1302} 1303