main.c revision 94990
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 94990 2002-04-18 12:04:34Z ru $"); 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 * Error Print a tagged error message. The global 63 * MAKE variable must have been defined. This 64 * takes a format string and two optional 65 * arguments for it. 66 * 67 * Fatal Print an error message and exit. Also takes 68 * a format string and two arguments. 69 * 70 * Punt Aborts all jobs and exits with a message. Also 71 * takes a format string and two arguments. 72 * 73 * Finish Finish things up by printing the number of 74 * errors which occured, as passed to it, and 75 * exiting. 76 */ 77 78#include <sys/types.h> 79#include <sys/time.h> 80#include <sys/param.h> 81#include <sys/resource.h> 82#include <sys/signal.h> 83#include <sys/stat.h> 84#if defined(__i386__) 85#include <sys/sysctl.h> 86#endif 87#ifndef MACHINE 88#include <sys/utsname.h> 89#endif 90#include <sys/wait.h> 91#include <err.h> 92#include <stdlib.h> 93#include <errno.h> 94#include <fcntl.h> 95#include <stdio.h> 96#include <sysexits.h> 97#include <stdarg.h> 98#include <unistd.h> 99#include "make.h" 100#include "hash.h" 101#include "dir.h" 102#include "job.h" 103#include "pathnames.h" 104 105#ifndef DEFMAXLOCAL 106#define DEFMAXLOCAL DEFMAXJOBS 107#endif /* DEFMAXLOCAL */ 108 109#define MAKEFLAGS ".MAKEFLAGS" 110 111Lst create; /* Targets to be made */ 112time_t now; /* Time at start of make */ 113GNode *DEFAULT; /* .DEFAULT node */ 114Boolean allPrecious; /* .PRECIOUS given on line by itself */ 115 116static Boolean noBuiltins; /* -r flag */ 117static Lst makefiles; /* ordered list of makefiles to read */ 118static Boolean printVars; /* print value of one or more vars */ 119static Boolean expandVars; /* fully expand printed variables */ 120static Lst variables; /* list of variables to print */ 121int maxJobs; /* -j argument */ 122static Boolean forceJobs; /* -j argument given */ 123static int maxLocal; /* -L argument */ 124Boolean compatMake; /* -B argument */ 125Boolean debug; /* -d flag */ 126Boolean noExecute; /* -n flag */ 127Boolean keepgoing; /* -k flag */ 128Boolean queryFlag; /* -q flag */ 129Boolean touchFlag; /* -t flag */ 130Boolean usePipes; /* !-P flag */ 131Boolean ignoreErrors; /* -i flag */ 132Boolean beSilent; /* -s flag */ 133Boolean beVerbose; /* -v flag */ 134Boolean oldVars; /* variable substitution style */ 135Boolean checkEnvFirst; /* -e flag */ 136Lst envFirstVars; /* (-E) vars to override from env */ 137static Boolean jobsRunning; /* TRUE if the jobs might be running */ 138 139static void MainParseArgs(int, char **); 140char * chdir_verify_path(char *, char *); 141static int ReadMakefile(void *, void *); 142static void usage(void); 143 144static char *curdir; /* startup directory */ 145static char *objdir; /* where we chdir'ed to */ 146 147/*- 148 * MainParseArgs -- 149 * Parse a given argument vector. Called from main() and from 150 * Main_ParseArgLine() when the .MAKEFLAGS target is used. 151 * 152 * XXX: Deal with command line overriding .MAKEFLAGS in makefile 153 * 154 * Results: 155 * None 156 * 157 * Side Effects: 158 * Various global and local flags will be set depending on the flags 159 * given 160 */ 161static void 162MainParseArgs(argc, argv) 163 int argc; 164 char **argv; 165{ 166 char *p; 167 int c; 168 169 optind = 1; /* since we're called more than once */ 170#ifdef REMOTE 171# define OPTFLAGS "BD:E:I:L:PSV:Xd:ef:ij:km:nqrstv" 172#else 173# define OPTFLAGS "BD:E:I:PSV:Xd:ef:ij:km:nqrstv" 174#endif 175rearg: while((c = getopt(argc, argv, OPTFLAGS)) != -1) { 176 switch(c) { 177 case 'D': 178 Var_Set(optarg, "1", VAR_GLOBAL); 179 Var_Append(MAKEFLAGS, "-D", VAR_GLOBAL); 180 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); 181 break; 182 case 'I': 183 Parse_AddIncludeDir(optarg); 184 Var_Append(MAKEFLAGS, "-I", VAR_GLOBAL); 185 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); 186 break; 187 case 'V': 188 printVars = TRUE; 189 (void)Lst_AtEnd(variables, (void *)optarg); 190 Var_Append(MAKEFLAGS, "-V", VAR_GLOBAL); 191 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); 192 break; 193 case 'X': 194 expandVars = FALSE; 195 break; 196 case 'B': 197 compatMake = TRUE; 198 Var_Append(MAKEFLAGS, "-B", VAR_GLOBAL); 199 break; 200#ifdef REMOTE 201 case 'L': { 202 char *endptr; 203 204 maxLocal = strtol(optarg, &endptr, 10); 205 if (maxLocal < 0 || *endptr != '\0') { 206 warnx("illegal number, -L argument -- %s", 207 optarg); 208 usage(); 209 } 210 Var_Append(MAKEFLAGS, "-L", VAR_GLOBAL); 211 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); 212 break; 213 } 214#endif 215 case 'P': 216 usePipes = FALSE; 217 Var_Append(MAKEFLAGS, "-P", VAR_GLOBAL); 218 break; 219 case 'S': 220 keepgoing = FALSE; 221 Var_Append(MAKEFLAGS, "-S", VAR_GLOBAL); 222 break; 223 case 'd': { 224 char *modules = optarg; 225 226 for (; *modules; ++modules) 227 switch (*modules) { 228 case 'A': 229 debug = ~0; 230 break; 231 case 'a': 232 debug |= DEBUG_ARCH; 233 break; 234 case 'c': 235 debug |= DEBUG_COND; 236 break; 237 case 'd': 238 debug |= DEBUG_DIR; 239 break; 240 case 'f': 241 debug |= DEBUG_FOR; 242 break; 243 case 'g': 244 if (modules[1] == '1') { 245 debug |= DEBUG_GRAPH1; 246 ++modules; 247 } 248 else if (modules[1] == '2') { 249 debug |= DEBUG_GRAPH2; 250 ++modules; 251 } 252 break; 253 case 'j': 254 debug |= DEBUG_JOB; 255 break; 256 case 'l': 257 debug |= DEBUG_LOUD; 258 break; 259 case 'm': 260 debug |= DEBUG_MAKE; 261 break; 262 case 's': 263 debug |= DEBUG_SUFF; 264 break; 265 case 't': 266 debug |= DEBUG_TARG; 267 break; 268 case 'v': 269 debug |= DEBUG_VAR; 270 break; 271 default: 272 warnx("illegal argument to d option -- %c", *modules); 273 usage(); 274 } 275 Var_Append(MAKEFLAGS, "-d", VAR_GLOBAL); 276 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); 277 break; 278 } 279 case 'E': 280 p = emalloc(strlen(optarg) + 1); 281 (void)strcpy(p, optarg); 282 (void)Lst_AtEnd(envFirstVars, (void *)p); 283 Var_Append(MAKEFLAGS, "-E", VAR_GLOBAL); 284 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); 285 break; 286 case 'e': 287 checkEnvFirst = TRUE; 288 Var_Append(MAKEFLAGS, "-e", VAR_GLOBAL); 289 break; 290 case 'f': 291 (void)Lst_AtEnd(makefiles, (void *)optarg); 292 break; 293 case 'i': 294 ignoreErrors = TRUE; 295 Var_Append(MAKEFLAGS, "-i", VAR_GLOBAL); 296 break; 297 case 'j': { 298 char *endptr; 299 300 forceJobs = TRUE; 301 maxJobs = strtol(optarg, &endptr, 10); 302 if (maxJobs <= 0 || *endptr != '\0') { 303 warnx("illegal number, -j argument -- %s", 304 optarg); 305 usage(); 306 } 307#ifndef REMOTE 308 maxLocal = maxJobs; 309#endif 310 Var_Append(MAKEFLAGS, "-j", VAR_GLOBAL); 311 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); 312 break; 313 } 314 case 'k': 315 keepgoing = TRUE; 316 Var_Append(MAKEFLAGS, "-k", VAR_GLOBAL); 317 break; 318 case 'm': 319 Dir_AddDir(sysIncPath, optarg); 320 Var_Append(MAKEFLAGS, "-m", VAR_GLOBAL); 321 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); 322 break; 323 case 'n': 324 noExecute = TRUE; 325 Var_Append(MAKEFLAGS, "-n", VAR_GLOBAL); 326 break; 327 case 'q': 328 queryFlag = TRUE; 329 /* Kind of nonsensical, wot? */ 330 Var_Append(MAKEFLAGS, "-q", VAR_GLOBAL); 331 break; 332 case 'r': 333 noBuiltins = TRUE; 334 Var_Append(MAKEFLAGS, "-r", VAR_GLOBAL); 335 break; 336 case 's': 337 beSilent = TRUE; 338 Var_Append(MAKEFLAGS, "-s", VAR_GLOBAL); 339 break; 340 case 't': 341 touchFlag = TRUE; 342 Var_Append(MAKEFLAGS, "-t", VAR_GLOBAL); 343 break; 344 case 'v': 345 beVerbose = TRUE; 346 Var_Append(MAKEFLAGS, "-v", VAR_GLOBAL); 347 break; 348 default: 349 case '?': 350 usage(); 351 } 352 } 353 354 oldVars = TRUE; 355 356 /* 357 * See if the rest of the arguments are variable assignments and 358 * perform them if so. Else take them to be targets and stuff them 359 * on the end of the "create" list. 360 */ 361 for (argv += optind, argc -= optind; *argv; ++argv, --argc) 362 if (Parse_IsVar(*argv)) 363 Parse_DoVar(*argv, VAR_CMD); 364 else { 365 if (!**argv) 366 Punt("illegal (null) argument."); 367 if (**argv == '-') { 368 if ((*argv)[1]) 369 optind = 0; /* -flag... */ 370 else 371 optind = 1; /* - */ 372 goto rearg; 373 } 374 (void)Lst_AtEnd(create, (void *)estrdup(*argv)); 375 } 376} 377 378/*- 379 * Main_ParseArgLine -- 380 * Used by the parse module when a .MFLAGS or .MAKEFLAGS target 381 * is encountered and by main() when reading the .MAKEFLAGS envariable. 382 * Takes a line of arguments and breaks it into its 383 * component words and passes those words and the number of them to the 384 * MainParseArgs function. 385 * The line should have all its leading whitespace removed. 386 * 387 * Results: 388 * None 389 * 390 * Side Effects: 391 * Only those that come from the various arguments. 392 */ 393void 394Main_ParseArgLine(line) 395 char *line; /* Line to fracture */ 396{ 397 char **argv; /* Manufactured argument vector */ 398 int argc; /* Number of arguments in argv */ 399 400 if (line == NULL) 401 return; 402 for (; *line == ' '; ++line) 403 continue; 404 if (!*line) 405 return; 406 407 argv = brk_string(line, &argc, TRUE); 408 MainParseArgs(argc, argv); 409} 410 411char * 412chdir_verify_path(path, obpath) 413 char *path; 414 char *obpath; 415{ 416 struct stat sb; 417 418 if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) { 419 if (chdir(path) == -1 || getcwd(obpath, MAXPATHLEN) == NULL) { 420 warn("warning: %s", path); 421 return 0; 422 } 423 return obpath; 424 } 425 426 return 0; 427} 428 429 430/*- 431 * main -- 432 * The main function, for obvious reasons. Initializes variables 433 * and a few modules, then parses the arguments give it in the 434 * environment and on the command line. Reads the system makefile 435 * followed by either Makefile, makefile or the file given by the 436 * -f argument. Sets the .MAKEFLAGS PMake variable based on all the 437 * flags it has received by then uses either the Make or the Compat 438 * module to create the initial list of targets. 439 * 440 * Results: 441 * If -q was given, exits -1 if anything was out-of-date. Else it exits 442 * 0. 443 * 444 * Side Effects: 445 * The program exits when done. Targets are created. etc. etc. etc. 446 */ 447int 448main(argc, argv) 449 int argc; 450 char **argv; 451{ 452 Lst targs; /* target nodes to create -- passed to Make_Init */ 453 Boolean outOfDate = TRUE; /* FALSE if all targets up to date */ 454 struct stat sa; 455 char *p, *p1, *path, *pathp; 456 char mdpath[MAXPATHLEN]; 457 char obpath[MAXPATHLEN]; 458 char cdpath[MAXPATHLEN]; 459 char *machine = getenv("MACHINE"); 460 char *machine_arch = getenv("MACHINE_ARCH"); 461 char *machine_cpu = getenv("MACHINE_CPU"); 462 Lst sysMkPath; /* Path of sys.mk */ 463 char *cp = NULL, *start; 464 /* avoid faults on read-only strings */ 465 static char syspath[] = _PATH_DEFSYSPATH; 466 467#if DEFSHELL == 2 468 /* 469 * Turn off ENV to make ksh happier. 470 */ 471 unsetenv("ENV"); 472#endif 473 474#ifdef RLIMIT_NOFILE 475 /* 476 * get rid of resource limit on file descriptors 477 */ 478 { 479 struct rlimit rl; 480 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 && 481 rl.rlim_cur != rl.rlim_max) { 482 rl.rlim_cur = rl.rlim_max; 483 (void) setrlimit(RLIMIT_NOFILE, &rl); 484 } 485 } 486#endif 487 /* 488 * Find where we are... 489 * All this code is so that we know where we are when we start up 490 * on a different machine with pmake. 491 */ 492 curdir = cdpath; 493 if (getcwd(curdir, MAXPATHLEN) == NULL) 494 err(2, NULL); 495 496 if (stat(curdir, &sa) == -1) 497 err(2, "%s", curdir); 498 499#if defined(__i386__) && defined(__FreeBSD_version) && \ 500 __FreeBSD_version > 300003 501 /* 502 * PC-98 kernel sets the `i386' string to the utsname.machine and 503 * it cannot be distinguished from IBM-PC by uname(3). Therefore, 504 * we check machine.ispc98 and adjust the machine variable before 505 * using usname(3) below. 506 * NOTE: machdep.ispc98 was defined on 1998/8/31. At that time, 507 * __FreeBSD_version was defined as 300003. So, this check can 508 * safely be done with any kernel with version > 300003. 509 */ 510 if (!machine) { 511 int ispc98; 512 size_t len; 513 514 len = sizeof(ispc98); 515 if (!sysctlbyname("machdep.ispc98", &ispc98, &len, NULL, 0)) { 516 if (ispc98) 517 machine = "pc98"; 518 } 519 } 520#endif 521 522 /* 523 * Get the name of this type of MACHINE from utsname 524 * so we can share an executable for similar machines. 525 * (i.e. m68k: amiga hp300, mac68k, sun3, ...) 526 * 527 * Note that while MACHINE is decided at run-time, 528 * MACHINE_ARCH is always known at compile time. 529 */ 530 if (!machine) { 531#ifndef MACHINE 532 struct utsname utsname; 533 534 if (uname(&utsname) == -1) 535 err(2, "uname"); 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("BSDmakefile", NULL)) 754 if (!ReadMakefile("makefile", NULL)) 755 (void)ReadMakefile("Makefile", NULL); 756 757 (void)ReadMakefile(".depend", NULL); 758 759 Var_Append("MFLAGS", Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1), VAR_GLOBAL); 760 efree(p1); 761 762 /* Install all the flags into the MAKE envariable. */ 763 if (((p = Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1)) != NULL) && *p) 764#ifdef POSIX 765 setenv("MAKEFLAGS", p, 1); 766#else 767 setenv("MAKE", p, 1); 768#endif 769 efree(p1); 770 771 /* 772 * For compatibility, look at the directories in the VPATH variable 773 * and add them to the search path, if the variable is defined. The 774 * variable's value is in the same format as the PATH envariable, i.e. 775 * <directory>:<directory>:<directory>... 776 */ 777 if (Var_Exists("VPATH", VAR_CMD)) { 778 char *vpath, *path, *cp, savec; 779 /* 780 * GCC stores string constants in read-only memory, but 781 * Var_Subst will want to write this thing, so store it 782 * in an array 783 */ 784 static char VPATH[] = "${VPATH}"; 785 786 vpath = Var_Subst(NULL, VPATH, VAR_CMD, FALSE); 787 path = vpath; 788 do { 789 /* skip to end of directory */ 790 for (cp = path; *cp != ':' && *cp != '\0'; cp++) 791 continue; 792 /* Save terminator character so know when to stop */ 793 savec = *cp; 794 *cp = '\0'; 795 /* Add directory to search path */ 796 Dir_AddDir(dirSearchPath, path); 797 *cp = savec; 798 path = cp + 1; 799 } while (savec == ':'); 800 (void)free(vpath); 801 } 802 803 /* 804 * Now that all search paths have been read for suffixes et al, it's 805 * time to add the default search path to their lists... 806 */ 807 Suff_DoPaths(); 808 809 /* print the initial graph, if the user requested it */ 810 if (DEBUG(GRAPH1)) 811 Targ_PrintGraph(1); 812 813 /* print the values of any variables requested by the user */ 814 if (printVars) { 815 LstNode ln; 816 817 for (ln = Lst_First(variables); ln != NULL; 818 ln = Lst_Succ(ln)) { 819 char *value; 820 if (expandVars) { 821 p1 = emalloc(strlen((char *)Lst_Datum(ln)) + 1 + 3); 822 /* This sprintf is safe, because of the malloc above */ 823 (void)sprintf(p1, "${%s}", (char *)Lst_Datum(ln)); 824 value = Var_Subst(NULL, p1, VAR_GLOBAL, FALSE); 825 } else { 826 value = Var_Value((char *)Lst_Datum(ln), 827 VAR_GLOBAL, &p1); 828 } 829 printf("%s\n", value ? value : ""); 830 if (p1) 831 free(p1); 832 } 833 } 834 835 /* 836 * Have now read the entire graph and need to make a list of targets 837 * to create. If none was given on the command line, we consult the 838 * parsing module to find the main target(s) to create. 839 */ 840 if (Lst_IsEmpty(create)) 841 targs = Parse_MainName(); 842 else 843 targs = Targ_FindList(create, TARG_CREATE); 844 845 if (!compatMake && !printVars) { 846 /* 847 * Initialize job module before traversing the graph, now that 848 * any .BEGIN and .END targets have been read. This is done 849 * only if the -q flag wasn't given (to prevent the .BEGIN from 850 * being executed should it exist). 851 */ 852 if (!queryFlag) { 853 if (maxLocal == -1) 854 maxLocal = maxJobs; 855 Job_Init(maxJobs, maxLocal); 856 jobsRunning = TRUE; 857 } 858 859 /* Traverse the graph, checking on all the targets */ 860 outOfDate = Make_Run(targs); 861 } else if (!printVars) { 862 /* 863 * Compat_Init will take care of creating all the targets as 864 * well as initializing the module. 865 */ 866 Compat_Run(targs); 867 } 868 869 Lst_Destroy(targs, NOFREE); 870 Lst_Destroy(variables, NOFREE); 871 Lst_Destroy(makefiles, NOFREE); 872 Lst_Destroy(create, (void (*)(void *)) free); 873 874 /* print the graph now it's been processed if the user requested it */ 875 if (DEBUG(GRAPH2)) 876 Targ_PrintGraph(2); 877 878 Suff_End(); 879 Targ_End(); 880 Arch_End(); 881 str_end(); 882 Var_End(); 883 Parse_End(); 884 Dir_End(); 885 886 if (queryFlag && outOfDate) 887 return(1); 888 else 889 return(0); 890} 891 892/*- 893 * ReadMakefile -- 894 * Open and parse the given makefile. 895 * 896 * Results: 897 * TRUE if ok. FALSE if couldn't open file. 898 * 899 * Side Effects: 900 * lots 901 */ 902static Boolean 903ReadMakefile(p, q) 904 void *p; 905 void *q; 906{ 907 char *fname = p; /* makefile to read */ 908 extern Lst parseIncPath; 909 FILE *stream; 910 char *name, path[MAXPATHLEN]; 911 int setMAKEFILE; 912 913 if (!strcmp(fname, "-")) { 914 Parse_File("(stdin)", stdin); 915 Var_Set("MAKEFILE", "", VAR_GLOBAL); 916 } else { 917 setMAKEFILE = strcmp(fname, ".depend"); 918 919 /* if we've chdir'd, rebuild the path name */ 920 if (curdir != objdir && *fname != '/') { 921 (void)snprintf(path, MAXPATHLEN, "%s/%s", curdir, fname); 922 if ((stream = fopen(path, "r")) != NULL) { 923 fname = path; 924 goto found; 925 } 926 } else if ((stream = fopen(fname, "r")) != NULL) 927 goto found; 928 /* look in -I and system include directories. */ 929 name = Dir_FindFile(fname, parseIncPath); 930 if (!name) 931 name = Dir_FindFile(fname, sysIncPath); 932 if (!name || !(stream = fopen(name, "r"))) 933 return(FALSE); 934 fname = name; 935 /* 936 * set the MAKEFILE variable desired by System V fans -- the 937 * placement of the setting here means it gets set to the last 938 * makefile specified, as it is set by SysV make. 939 */ 940found: 941 if (setMAKEFILE) 942 Var_Set("MAKEFILE", fname, VAR_GLOBAL); 943 Parse_File(fname, stream); 944 (void)fclose(stream); 945 } 946 return(TRUE); 947} 948 949/*- 950 * Cmd_Exec -- 951 * Execute the command in cmd, and return the output of that command 952 * in a string. 953 * 954 * Results: 955 * A string containing the output of the command, or the empty string 956 * If err is not NULL, it contains the reason for the command failure 957 * 958 * Side Effects: 959 * The string must be freed by the caller. 960 */ 961char * 962Cmd_Exec(cmd, err) 963 char *cmd; 964 char **err; 965{ 966 char *args[4]; /* Args for invoking the shell */ 967 int fds[2]; /* Pipe streams */ 968 int cpid; /* Child PID */ 969 int pid; /* PID from wait() */ 970 char *res; /* result */ 971 int status; /* command exit status */ 972 Buffer buf; /* buffer to store the result */ 973 char *cp; 974 int cc; 975 976 977 *err = NULL; 978 979 /* 980 * Set up arguments for shell 981 */ 982 args[0] = "sh"; 983 args[1] = "-c"; 984 args[2] = cmd; 985 args[3] = NULL; 986 987 /* 988 * Open a pipe for fetching its output 989 */ 990 if (pipe(fds) == -1) { 991 *err = "Couldn't create pipe for \"%s\""; 992 goto bad; 993 } 994 995 /* 996 * Fork 997 */ 998 switch (cpid = vfork()) { 999 case 0: 1000 /* 1001 * Close input side of pipe 1002 */ 1003 (void) close(fds[0]); 1004 1005 /* 1006 * Duplicate the output stream to the shell's output, then 1007 * shut the extra thing down. Note we don't fetch the error 1008 * stream...why not? Why? 1009 */ 1010 (void) dup2(fds[1], 1); 1011 (void) close(fds[1]); 1012 1013#if DEFSHELL == 1 1014 (void) execv("/bin/sh", args); 1015#elif DEFSHELL == 2 1016 (void) execv("/bin/ksh", args); 1017#else 1018#error "DEFSHELL must be 1 or 2." 1019#endif 1020 _exit(1); 1021 /*NOTREACHED*/ 1022 1023 case -1: 1024 *err = "Couldn't exec \"%s\""; 1025 goto bad; 1026 1027 default: 1028 /* 1029 * No need for the writing half 1030 */ 1031 (void) close(fds[1]); 1032 1033 buf = Buf_Init (MAKE_BSIZE); 1034 1035 do { 1036 char result[BUFSIZ]; 1037 cc = read(fds[0], result, sizeof(result)); 1038 if (cc > 0) 1039 Buf_AddBytes(buf, cc, (Byte *) result); 1040 } 1041 while (cc > 0 || (cc == -1 && errno == EINTR)); 1042 1043 /* 1044 * Close the input side of the pipe. 1045 */ 1046 (void) close(fds[0]); 1047 1048 /* 1049 * Wait for the process to exit. 1050 */ 1051 while(((pid = wait(&status)) != cpid) && (pid >= 0)) 1052 continue; 1053 1054 if (cc == -1) 1055 *err = "Error reading shell's output for \"%s\""; 1056 1057 res = (char *)Buf_GetAll (buf, &cc); 1058 Buf_Destroy (buf, FALSE); 1059 1060 if (status) 1061 *err = "\"%s\" returned non-zero status"; 1062 1063 /* 1064 * Null-terminate the result, convert newlines to spaces and 1065 * install it in the variable. 1066 */ 1067 res[cc] = '\0'; 1068 cp = &res[cc] - 1; 1069 1070 if (*cp == '\n') { 1071 /* 1072 * A final newline is just stripped 1073 */ 1074 *cp-- = '\0'; 1075 } 1076 while (cp >= res) { 1077 if (*cp == '\n') { 1078 *cp = ' '; 1079 } 1080 cp--; 1081 } 1082 break; 1083 } 1084 return res; 1085bad: 1086 res = emalloc(1); 1087 *res = '\0'; 1088 return res; 1089} 1090 1091/*- 1092 * Error -- 1093 * Print an error message given its format. 1094 * 1095 * Results: 1096 * None. 1097 * 1098 * Side Effects: 1099 * The message is printed. 1100 */ 1101/* VARARGS */ 1102void 1103Error(char *fmt, ...) 1104{ 1105 va_list ap; 1106 1107 va_start(ap, fmt); 1108 (void)vfprintf(stderr, fmt, ap); 1109 va_end(ap); 1110 (void)fprintf(stderr, "\n"); 1111 (void)fflush(stderr); 1112} 1113 1114/*- 1115 * Fatal -- 1116 * Produce a Fatal error message. If jobs are running, waits for them 1117 * to finish. 1118 * 1119 * Results: 1120 * None 1121 * 1122 * Side Effects: 1123 * The program exits 1124 */ 1125/* VARARGS */ 1126void 1127Fatal(char *fmt, ...) 1128{ 1129 va_list ap; 1130 1131 va_start(ap, fmt); 1132 if (jobsRunning) 1133 Job_Wait(); 1134 1135 (void)vfprintf(stderr, fmt, ap); 1136 va_end(ap); 1137 (void)fprintf(stderr, "\n"); 1138 (void)fflush(stderr); 1139 1140 if (DEBUG(GRAPH2)) 1141 Targ_PrintGraph(2); 1142 exit(2); /* Not 1 so -q can distinguish error */ 1143} 1144 1145/* 1146 * Punt -- 1147 * Major exception once jobs are being created. Kills all jobs, prints 1148 * a message and exits. 1149 * 1150 * Results: 1151 * None 1152 * 1153 * Side Effects: 1154 * All children are killed indiscriminately and the program Lib_Exits 1155 */ 1156/* VARARGS */ 1157void 1158Punt(char *fmt, ...) 1159{ 1160 va_list ap; 1161 1162 va_start(ap, fmt); 1163 (void)fprintf(stderr, "make: "); 1164 (void)vfprintf(stderr, fmt, ap); 1165 va_end(ap); 1166 (void)fprintf(stderr, "\n"); 1167 (void)fflush(stderr); 1168 1169 DieHorribly(); 1170} 1171 1172/*- 1173 * DieHorribly -- 1174 * Exit without giving a message. 1175 * 1176 * Results: 1177 * None 1178 * 1179 * Side Effects: 1180 * A big one... 1181 */ 1182void 1183DieHorribly() 1184{ 1185 if (jobsRunning) 1186 Job_AbortAll(); 1187 if (DEBUG(GRAPH2)) 1188 Targ_PrintGraph(2); 1189 exit(2); /* Not 1, so -q can distinguish error */ 1190} 1191 1192/* 1193 * Finish -- 1194 * Called when aborting due to errors in child shell to signal 1195 * abnormal exit. 1196 * 1197 * Results: 1198 * None 1199 * 1200 * Side Effects: 1201 * The program exits 1202 */ 1203void 1204Finish(errors) 1205 int errors; /* number of errors encountered in Make_Make */ 1206{ 1207 Fatal("%d error%s", errors, errors == 1 ? "" : "s"); 1208} 1209 1210/* 1211 * emalloc -- 1212 * malloc, but die on error. 1213 */ 1214void * 1215emalloc(len) 1216 size_t len; 1217{ 1218 void *p; 1219 1220 if ((p = malloc(len)) == NULL) 1221 enomem(); 1222 return(p); 1223} 1224 1225/* 1226 * estrdup -- 1227 * strdup, but die on error. 1228 */ 1229char * 1230estrdup(str) 1231 const char *str; 1232{ 1233 char *p; 1234 1235 if ((p = strdup(str)) == NULL) 1236 enomem(); 1237 return(p); 1238} 1239 1240/* 1241 * erealloc -- 1242 * realloc, but die on error. 1243 */ 1244void * 1245erealloc(ptr, size) 1246 void *ptr; 1247 size_t size; 1248{ 1249 if ((ptr = realloc(ptr, size)) == NULL) 1250 enomem(); 1251 return(ptr); 1252} 1253 1254/* 1255 * enomem -- 1256 * die when out of memory. 1257 */ 1258void 1259enomem() 1260{ 1261 err(2, NULL); 1262} 1263 1264/* 1265 * enunlink -- 1266 * Remove a file carefully, avoiding directories. 1267 */ 1268int 1269eunlink(file) 1270 const char *file; 1271{ 1272 struct stat st; 1273 1274 if (lstat(file, &st) == -1) 1275 return -1; 1276 1277 if (S_ISDIR(st.st_mode)) { 1278 errno = EISDIR; 1279 return -1; 1280 } 1281 return unlink(file); 1282} 1283 1284/* 1285 * usage -- 1286 * exit with usage message 1287 */ 1288static void 1289usage() 1290{ 1291 (void)fprintf(stderr, "%s\n%s\n%s\n", 1292"usage: make [-Beiknqrstv] [-D variable] [-d flags] [-E variable] [-f makefile]", 1293" [-I directory] [-j max_jobs] [-m directory] [-V variable]", 1294" [variable=value] [target ...]"); 1295 exit(2); 1296} 1297 1298 1299int 1300PrintAddr(a, b) 1301 void * a; 1302 void * b; 1303{ 1304 printf("%lx ", (unsigned long) a); 1305 return b ? 0 : 0; 1306} 1307