main.c revision 127880
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 127880 2004-04-05 06:16:48Z des $"); 50 51/*- 52 * main.c -- 53 * The main file for this entire program. Exit routines etc 54 * reside here. 55 * 56 * Utility functions defined in this file: 57 * Main_ParseArgLine Takes a line of arguments, breaks them and 58 * treats them as if they were given when first 59 * invoked. Used by the parse module to implement 60 * the .MFLAGS target. 61 */ 62 63#include <sys/param.h> 64#include <sys/resource.h> 65#include <sys/signal.h> 66#include <sys/stat.h> 67#if defined(__i386__) 68#include <sys/sysctl.h> 69#endif 70#include <sys/time.h> 71#ifndef MACHINE 72#include <sys/utsname.h> 73#endif 74#include <sys/wait.h> 75 76#include <err.h> 77#include <errno.h> 78#include <fcntl.h> 79#include <signal.h> 80#include <stdarg.h> 81#include <stdio.h> 82#include <stdlib.h> 83#include <sysexits.h> 84#include <unistd.h> 85 86#include "make.h" 87#include "hash.h" 88#include "dir.h" 89#include "job.h" 90#include "pathnames.h" 91 92#define WANT_ENV_MKLVL 1 93 94#ifndef DEFMAXLOCAL 95#define DEFMAXLOCAL DEFMAXJOBS 96#endif /* DEFMAXLOCAL */ 97 98#define MAKEFLAGS ".MAKEFLAGS" 99 100Lst create; /* Targets to be made */ 101time_t now; /* Time at start of make */ 102GNode *DEFAULT; /* .DEFAULT node */ 103Boolean allPrecious; /* .PRECIOUS given on line by itself */ 104 105static Boolean noBuiltins; /* -r flag */ 106static Lst makefiles; /* ordered list of makefiles to read */ 107static Boolean expandVars; /* fully expand printed variables */ 108static Lst variables; /* list of variables to print */ 109int maxJobs; /* -j argument */ 110static Boolean forceJobs; /* -j argument given */ 111static int maxLocal; /* -L argument */ 112Boolean compatMake; /* -B argument */ 113Boolean debug; /* -d flag */ 114Boolean noExecute; /* -n flag */ 115Boolean keepgoing; /* -k flag */ 116Boolean queryFlag; /* -q flag */ 117Boolean touchFlag; /* -t flag */ 118Boolean usePipes; /* !-P flag */ 119Boolean ignoreErrors; /* -i flag */ 120Boolean beSilent; /* -s flag */ 121Boolean beVerbose; /* -v flag */ 122Boolean oldVars; /* variable substitution style */ 123Boolean checkEnvFirst; /* -e flag */ 124Lst envFirstVars; /* (-E) vars to override from env */ 125Boolean jobsRunning; /* TRUE if the jobs might be running */ 126 127static void MainParseArgs(int, char **); 128char * chdir_verify_path(char *, char *); 129static int ReadMakefile(void *, void *); 130static void usage(void); 131 132static char *curdir; /* startup directory */ 133static char *objdir; /* where we chdir'ed to */ 134 135/*- 136 * MainParseArgs -- 137 * Parse a given argument vector. Called from main() and from 138 * Main_ParseArgLine() when the .MAKEFLAGS target is used. 139 * 140 * XXX: Deal with command line overriding .MAKEFLAGS in makefile 141 * 142 * Results: 143 * None 144 * 145 * Side Effects: 146 * Various global and local flags will be set depending on the flags 147 * given 148 */ 149static void 150MainParseArgs(int argc, char **argv) 151{ 152 char *p; 153 int c; 154 155 optind = 1; /* since we're called more than once */ 156#ifdef REMOTE 157# define OPTFLAGS "BC:D:E:I:L:PSV:Xd:ef:ij:km:nqrstv" 158#else 159# define OPTFLAGS "BC:D:E:I:PSV:Xd:ef:ij:km:nqrstv" 160#endif 161rearg: while((c = getopt(argc, argv, OPTFLAGS)) != -1) { 162 switch(c) { 163 case 'C': 164 if (chdir(optarg) == -1) 165 err(1, "chdir %s", optarg); 166 break; 167 case 'D': 168 Var_Set(optarg, "1", VAR_GLOBAL); 169 Var_Append(MAKEFLAGS, "-D", VAR_GLOBAL); 170 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); 171 break; 172 case 'I': 173 Parse_AddIncludeDir(optarg); 174 Var_Append(MAKEFLAGS, "-I", VAR_GLOBAL); 175 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); 176 break; 177 case 'V': 178 (void)Lst_AtEnd(variables, (void *)optarg); 179 Var_Append(MAKEFLAGS, "-V", VAR_GLOBAL); 180 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); 181 break; 182 case 'X': 183 expandVars = FALSE; 184 break; 185 case 'B': 186 compatMake = TRUE; 187 Var_Append(MAKEFLAGS, "-B", VAR_GLOBAL); 188 break; 189#ifdef REMOTE 190 case 'L': { 191 char *endptr; 192 193 maxLocal = strtol(optarg, &endptr, 10); 194 if (maxLocal < 0 || *endptr != '\0') { 195 warnx("illegal number, -L argument -- %s", 196 optarg); 197 usage(); 198 } 199 Var_Append(MAKEFLAGS, "-L", VAR_GLOBAL); 200 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); 201 break; 202 } 203#endif 204 case 'P': 205 usePipes = FALSE; 206 Var_Append(MAKEFLAGS, "-P", VAR_GLOBAL); 207 break; 208 case 'S': 209 keepgoing = FALSE; 210 Var_Append(MAKEFLAGS, "-S", VAR_GLOBAL); 211 break; 212 case 'd': { 213 char *modules = optarg; 214 215 for (; *modules; ++modules) 216 switch (*modules) { 217 case 'A': 218 debug = ~0; 219 break; 220 case 'a': 221 debug |= DEBUG_ARCH; 222 break; 223 case 'c': 224 debug |= DEBUG_COND; 225 break; 226 case 'd': 227 debug |= DEBUG_DIR; 228 break; 229 case 'f': 230 debug |= DEBUG_FOR; 231 break; 232 case 'g': 233 if (modules[1] == '1') { 234 debug |= DEBUG_GRAPH1; 235 ++modules; 236 } 237 else if (modules[1] == '2') { 238 debug |= DEBUG_GRAPH2; 239 ++modules; 240 } 241 break; 242 case 'j': 243 debug |= DEBUG_JOB; 244 break; 245 case 'l': 246 debug |= DEBUG_LOUD; 247 break; 248 case 'm': 249 debug |= DEBUG_MAKE; 250 break; 251 case 's': 252 debug |= DEBUG_SUFF; 253 break; 254 case 't': 255 debug |= DEBUG_TARG; 256 break; 257 case 'v': 258 debug |= DEBUG_VAR; 259 break; 260 default: 261 warnx("illegal argument to d option -- %c", *modules); 262 usage(); 263 } 264 Var_Append(MAKEFLAGS, "-d", VAR_GLOBAL); 265 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); 266 break; 267 } 268 case 'E': 269 p = emalloc(strlen(optarg) + 1); 270 (void)strcpy(p, optarg); 271 (void)Lst_AtEnd(envFirstVars, (void *)p); 272 Var_Append(MAKEFLAGS, "-E", VAR_GLOBAL); 273 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); 274 break; 275 case 'e': 276 checkEnvFirst = TRUE; 277 Var_Append(MAKEFLAGS, "-e", VAR_GLOBAL); 278 break; 279 case 'f': 280 (void)Lst_AtEnd(makefiles, (void *)optarg); 281 break; 282 case 'i': 283 ignoreErrors = TRUE; 284 Var_Append(MAKEFLAGS, "-i", VAR_GLOBAL); 285 break; 286 case 'j': { 287 char *endptr; 288 289 forceJobs = TRUE; 290 maxJobs = strtol(optarg, &endptr, 10); 291 if (maxJobs <= 0 || *endptr != '\0') { 292 warnx("illegal number, -j argument -- %s", 293 optarg); 294 usage(); 295 } 296#ifndef REMOTE 297 maxLocal = maxJobs; 298#endif 299 Var_Append(MAKEFLAGS, "-j", VAR_GLOBAL); 300 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); 301 break; 302 } 303 case 'k': 304 keepgoing = TRUE; 305 Var_Append(MAKEFLAGS, "-k", VAR_GLOBAL); 306 break; 307 case 'm': 308 Dir_AddDir(sysIncPath, optarg); 309 Var_Append(MAKEFLAGS, "-m", VAR_GLOBAL); 310 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); 311 break; 312 case 'n': 313 noExecute = TRUE; 314 Var_Append(MAKEFLAGS, "-n", VAR_GLOBAL); 315 break; 316 case 'q': 317 queryFlag = TRUE; 318 /* Kind of nonsensical, wot? */ 319 Var_Append(MAKEFLAGS, "-q", VAR_GLOBAL); 320 break; 321 case 'r': 322 noBuiltins = TRUE; 323 Var_Append(MAKEFLAGS, "-r", VAR_GLOBAL); 324 break; 325 case 's': 326 beSilent = TRUE; 327 Var_Append(MAKEFLAGS, "-s", VAR_GLOBAL); 328 break; 329 case 't': 330 touchFlag = TRUE; 331 Var_Append(MAKEFLAGS, "-t", VAR_GLOBAL); 332 break; 333 case 'v': 334 beVerbose = TRUE; 335 Var_Append(MAKEFLAGS, "-v", VAR_GLOBAL); 336 break; 337 default: 338 case '?': 339 usage(); 340 } 341 } 342 343 oldVars = TRUE; 344 345 /* 346 * See if the rest of the arguments are variable assignments and 347 * perform them if so. Else take them to be targets and stuff them 348 * on the end of the "create" list. 349 */ 350 for (argv += optind, argc -= optind; *argv; ++argv, --argc) 351 if (Parse_IsVar(*argv)) 352 Parse_DoVar(*argv, VAR_CMD); 353 else { 354 if (!**argv) 355 Punt("illegal (null) argument."); 356 if (**argv == '-') { 357 if ((*argv)[1]) 358 optind = 0; /* -flag... */ 359 else 360 optind = 1; /* - */ 361 goto rearg; 362 } 363 (void)Lst_AtEnd(create, (void *)estrdup(*argv)); 364 } 365} 366 367/*- 368 * Main_ParseArgLine -- 369 * Used by the parse module when a .MFLAGS or .MAKEFLAGS target 370 * is encountered and by main() when reading the .MAKEFLAGS envariable. 371 * Takes a line of arguments and breaks it into its 372 * component words and passes those words and the number of them to the 373 * MainParseArgs function. 374 * The line should have all its leading whitespace removed. 375 * 376 * Results: 377 * None 378 * 379 * Side Effects: 380 * Only those that come from the various arguments. 381 */ 382void 383Main_ParseArgLine(char *line) 384{ 385 char **argv; /* Manufactured argument vector */ 386 int argc; /* Number of arguments in argv */ 387 388 if (line == NULL) 389 return; 390 for (; *line == ' '; ++line) 391 continue; 392 if (!*line) 393 return; 394 395 argv = brk_string(line, &argc, TRUE); 396 MainParseArgs(argc, argv); 397} 398 399char * 400chdir_verify_path(char *path, char *obpath) 401{ 402 struct stat sb; 403 404 if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) { 405 if (chdir(path) == -1 || getcwd(obpath, MAXPATHLEN) == NULL) { 406 warn("warning: %s", path); 407 return 0; 408 } 409 return obpath; 410 } 411 412 return 0; 413} 414 415void 416catch_child(int sig) 417{ 418} 419 420/*- 421 * main -- 422 * The main function, for obvious reasons. Initializes variables 423 * and a few modules, then parses the arguments give it in the 424 * environment and on the command line. Reads the system makefile 425 * followed by either Makefile, makefile or the file given by the 426 * -f argument. Sets the .MAKEFLAGS PMake variable based on all the 427 * flags it has received by then uses either the Make or the Compat 428 * module to create the initial list of targets. 429 * 430 * Results: 431 * If -q was given, exits -1 if anything was out-of-date. Else it exits 432 * 0. 433 * 434 * Side Effects: 435 * The program exits when done. Targets are created. etc. etc. etc. 436 */ 437int 438main(int argc, char **argv) 439{ 440 Lst targs; /* target nodes to create -- passed to Make_Init */ 441 Boolean outOfDate = TRUE; /* FALSE if all targets up to date */ 442 struct stat sa; 443 char *p, *p1, *path, *pathp; 444#ifdef WANT_ENV_MKLVL 445#define MKLVL_MAXVAL 500 446#define MKLVL_ENVVAR "__MKLVL__" 447 int iMkLvl = 0; 448 char *szMkLvl = getenv(MKLVL_ENVVAR); 449#endif /* WANT_ENV_MKLVL */ 450 char mdpath[MAXPATHLEN]; 451 char obpath[MAXPATHLEN]; 452 char cdpath[MAXPATHLEN]; 453 char *machine = getenv("MACHINE"); 454 char *machine_arch = getenv("MACHINE_ARCH"); 455 char *machine_cpu = getenv("MACHINE_CPU"); 456 Lst sysMkPath; /* Path of sys.mk */ 457 char *cp = NULL, *start; 458 /* avoid faults on read-only strings */ 459 static char syspath[] = _PATH_DEFSYSPATH; 460 461 { 462 /* 463 * Catch SIGCHLD so that we get kicked out of select() when we 464 * need to look at a child. This is only known to matter for the 465 * -j case (perhaps without -P). 466 * 467 * XXX this is intentionally misplaced. 468 */ 469 struct sigaction sa; 470 471 sigemptyset(&sa.sa_mask); 472 sa.sa_flags = SA_RESTART | SA_NOCLDSTOP; 473 sa.sa_handler = catch_child; 474 sigaction(SIGCHLD, &sa, NULL); 475 } 476 477#ifdef WANT_ENV_MKLVL 478 if ((iMkLvl = szMkLvl ? atoi(szMkLvl) : 0) < 0) { 479 iMkLvl = 0; 480 } 481 if (iMkLvl++ > MKLVL_MAXVAL) { 482 errc(2, EAGAIN, 483 "Max recursion level (%d) exceeded.", MKLVL_MAXVAL); 484 } 485 bzero(szMkLvl = emalloc(32), 32); 486 sprintf(szMkLvl, "%d", iMkLvl); 487 setenv(MKLVL_ENVVAR, szMkLvl, 1); 488#endif /* WANT_ENV_MKLVL */ 489 490#if DEFSHELL == 2 491 /* 492 * Turn off ENV to make ksh happier. 493 */ 494 unsetenv("ENV"); 495#endif 496 497#ifdef RLIMIT_NOFILE 498 /* 499 * get rid of resource limit on file descriptors 500 */ 501 { 502 struct rlimit rl; 503 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 && 504 rl.rlim_cur != rl.rlim_max) { 505 rl.rlim_cur = rl.rlim_max; 506 (void) setrlimit(RLIMIT_NOFILE, &rl); 507 } 508 } 509#endif 510 511 /* 512 * PC-98 kernel sets the `i386' string to the utsname.machine and 513 * it cannot be distinguished from IBM-PC by uname(3). Therefore, 514 * we check machine.ispc98 and adjust the machine variable before 515 * using usname(3) below. 516 * NOTE: machdep.ispc98 was defined on 1998/8/31. At that time, 517 * __FreeBSD_version was defined as 300003. So, this check can 518 * safely be done with any kernel with version > 300003. 519 */ 520 if (!machine) { 521 int ispc98; 522 size_t len; 523 524 len = sizeof(ispc98); 525 if (!sysctlbyname("machdep.ispc98", &ispc98, &len, NULL, 0)) { 526 if (ispc98) 527 machine = "pc98"; 528 } 529 } 530 531 /* 532 * Get the name of this type of MACHINE from utsname 533 * so we can share an executable for similar machines. 534 * (i.e. m68k: amiga hp300, mac68k, sun3, ...) 535 * 536 * Note that while MACHINE is decided at run-time, 537 * MACHINE_ARCH is always known at compile time. 538 */ 539 if (!machine) { 540#ifndef MACHINE 541 struct utsname utsname; 542 543 if (uname(&utsname) == -1) 544 err(2, "uname"); 545 machine = utsname.machine; 546#else 547 machine = MACHINE; 548#endif 549 } 550 551 if (!machine_arch) { 552#ifndef MACHINE_ARCH 553 machine_arch = "unknown"; 554#else 555 machine_arch = MACHINE_ARCH; 556#endif 557 } 558 559 /* 560 * Set machine_cpu to the minumum supported CPU revision based 561 * on the target architecture, if not already set. 562 */ 563 if (!machine_cpu) { 564 if (!strcmp(machine_arch, "i386")) 565 machine_cpu = "i386"; 566 else if (!strcmp(machine_arch, "alpha")) 567 machine_cpu = "ev4"; 568 else 569 machine_cpu = "unknown"; 570 } 571 572 create = Lst_Init(FALSE); 573 makefiles = Lst_Init(FALSE); 574 envFirstVars = Lst_Init(FALSE); 575 expandVars = TRUE; 576 variables = Lst_Init(FALSE); 577 beSilent = FALSE; /* Print commands as executed */ 578 ignoreErrors = FALSE; /* Pay attention to non-zero returns */ 579 noExecute = FALSE; /* Execute all commands */ 580 keepgoing = FALSE; /* Stop on error */ 581 allPrecious = FALSE; /* Remove targets when interrupted */ 582 queryFlag = FALSE; /* This is not just a check-run */ 583 noBuiltins = FALSE; /* Read the built-in rules */ 584 touchFlag = FALSE; /* Actually update targets */ 585 usePipes = TRUE; /* Catch child output in pipes */ 586 debug = 0; /* No debug verbosity, please. */ 587 jobsRunning = FALSE; 588 589 maxLocal = DEFMAXLOCAL; /* Set default local max concurrency */ 590#ifdef REMOTE 591 maxJobs = DEFMAXJOBS; /* Set default max concurrency */ 592#else 593 maxJobs = maxLocal; 594#endif 595 forceJobs = FALSE; /* No -j flag */ 596 compatMake = FALSE; /* No compat mode */ 597 598 599 /* 600 * Initialize the parsing, directory and variable modules to prepare 601 * for the reading of inclusion paths and variable settings on the 602 * command line 603 */ 604 Dir_Init(); /* Initialize directory structures so -I flags 605 * can be processed correctly */ 606 Parse_Init(); /* Need to initialize the paths of #include 607 * directories */ 608 Var_Init(); /* As well as the lists of variables for 609 * parsing arguments */ 610 str_init(); 611 612 /* 613 * Initialize various variables. 614 * MAKE also gets this name, for compatibility 615 * .MAKEFLAGS gets set to the empty string just in case. 616 * MFLAGS also gets initialized empty, for compatibility. 617 */ 618 Var_Set("MAKE", argv[0], VAR_GLOBAL); 619 Var_Set(MAKEFLAGS, "", VAR_GLOBAL); 620 Var_Set("MFLAGS", "", VAR_GLOBAL); 621 Var_Set("MACHINE", machine, VAR_GLOBAL); 622 Var_Set("MACHINE_ARCH", machine_arch, VAR_GLOBAL); 623 Var_Set("MACHINE_CPU", machine_cpu, VAR_GLOBAL); 624#ifdef MAKE_VERSION 625 Var_Set("MAKE_VERSION", MAKE_VERSION, VAR_GLOBAL); 626#endif 627 628 /* 629 * First snag any flags out of the MAKE environment variable. 630 * (Note this is *not* MAKEFLAGS since /bin/make uses that and it's 631 * in a different format). 632 */ 633#ifdef POSIX 634 Main_ParseArgLine(getenv("MAKEFLAGS")); 635#else 636 Main_ParseArgLine(getenv("MAKE")); 637#endif 638 639 MainParseArgs(argc, argv); 640 641 /* 642 * Find where we are... 643 * All this code is so that we know where we are when we start up 644 * on a different machine with pmake. 645 */ 646 curdir = cdpath; 647 if (getcwd(curdir, MAXPATHLEN) == NULL) 648 err(2, NULL); 649 650 if (stat(curdir, &sa) == -1) 651 err(2, "%s", curdir); 652 653 /* 654 * The object directory location is determined using the 655 * following order of preference: 656 * 657 * 1. MAKEOBJDIRPREFIX`cwd` 658 * 2. MAKEOBJDIR 659 * 3. _PATH_OBJDIR.${MACHINE} 660 * 4. _PATH_OBJDIR 661 * 5. _PATH_OBJDIRPREFIX`cwd` 662 * 663 * If one of the first two fails, use the current directory. 664 * If the remaining three all fail, use the current directory. 665 * 666 * Once things are initted, 667 * have to add the original directory to the search path, 668 * and modify the paths for the Makefiles apropriately. The 669 * current directory is also placed as a variable for make scripts. 670 */ 671 if (!(pathp = getenv("MAKEOBJDIRPREFIX"))) { 672 if (!(path = getenv("MAKEOBJDIR"))) { 673 path = _PATH_OBJDIR; 674 pathp = _PATH_OBJDIRPREFIX; 675 (void) snprintf(mdpath, MAXPATHLEN, "%s.%s", 676 path, machine); 677 if (!(objdir = chdir_verify_path(mdpath, obpath))) 678 if (!(objdir=chdir_verify_path(path, obpath))) { 679 (void) snprintf(mdpath, MAXPATHLEN, 680 "%s%s", pathp, curdir); 681 if (!(objdir=chdir_verify_path(mdpath, 682 obpath))) 683 objdir = curdir; 684 } 685 } 686 else if (!(objdir = chdir_verify_path(path, obpath))) 687 objdir = curdir; 688 } 689 else { 690 (void) snprintf(mdpath, MAXPATHLEN, "%s%s", pathp, curdir); 691 if (!(objdir = chdir_verify_path(mdpath, obpath))) 692 objdir = curdir; 693 } 694 Dir_InitDot(); /* Initialize the "." directory */ 695 if (objdir != curdir) 696 Dir_AddDir(dirSearchPath, curdir); 697 Var_Set(".CURDIR", curdir, VAR_GLOBAL); 698 Var_Set(".OBJDIR", objdir, VAR_GLOBAL); 699 700 /* 701 * Be compatible if user did not specify -j and did not explicitly 702 * turned compatibility on 703 */ 704 if (!compatMake && !forceJobs) 705 compatMake = TRUE; 706 707 /* 708 * Initialize archive, target and suffix modules in preparation for 709 * parsing the makefile(s) 710 */ 711 Arch_Init(); 712 Targ_Init(); 713 Suff_Init(); 714 715 DEFAULT = NULL; 716 (void)time(&now); 717 718 /* 719 * Set up the .TARGETS variable to contain the list of targets to be 720 * created. If none specified, make the variable empty -- the parser 721 * will fill the thing in with the default or .MAIN target. 722 */ 723 if (!Lst_IsEmpty(create)) { 724 LstNode ln; 725 726 for (ln = Lst_First(create); ln != NULL; 727 ln = Lst_Succ(ln)) { 728 char *name = (char *)Lst_Datum(ln); 729 730 Var_Append(".TARGETS", name, VAR_GLOBAL); 731 } 732 } else 733 Var_Set(".TARGETS", "", VAR_GLOBAL); 734 735 736 /* 737 * If no user-supplied system path was given (through the -m option) 738 * add the directories from the DEFSYSPATH (more than one may be given 739 * as dir1:...:dirn) to the system include path. 740 */ 741 if (Lst_IsEmpty(sysIncPath)) { 742 for (start = syspath; *start != '\0'; start = cp) { 743 for (cp = start; *cp != '\0' && *cp != ':'; cp++) 744 continue; 745 if (*cp == '\0') { 746 Dir_AddDir(sysIncPath, start); 747 } else { 748 *cp++ = '\0'; 749 Dir_AddDir(sysIncPath, start); 750 } 751 } 752 } 753 754 /* 755 * Read in the built-in rules first, followed by the specified 756 * makefile, if it was (makefile != (char *) NULL), or the default 757 * Makefile and makefile, in that order, if it wasn't. 758 */ 759 if (!noBuiltins) { 760 LstNode ln; 761 762 sysMkPath = Lst_Init (FALSE); 763 Dir_Expand (_PATH_DEFSYSMK, sysIncPath, sysMkPath); 764 if (Lst_IsEmpty(sysMkPath)) 765 Fatal("make: no system rules (%s).", _PATH_DEFSYSMK); 766 ln = Lst_Find(sysMkPath, (void *)NULL, ReadMakefile); 767 if (ln != NULL) 768 Fatal("make: cannot open %s.", (char *)Lst_Datum(ln)); 769 } 770 771 if (!Lst_IsEmpty(makefiles)) { 772 LstNode ln; 773 774 ln = Lst_Find(makefiles, (void *)NULL, ReadMakefile); 775 if (ln != NULL) 776 Fatal("make: cannot open %s.", (char *)Lst_Datum(ln)); 777 } else if (!ReadMakefile("BSDmakefile", NULL)) 778 if (!ReadMakefile("makefile", NULL)) 779 (void)ReadMakefile("Makefile", NULL); 780 781 (void)ReadMakefile(".depend", NULL); 782 783 Var_Append("MFLAGS", Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1), VAR_GLOBAL); 784 free(p1); 785 786 /* Install all the flags into the MAKE envariable. */ 787 if (((p = Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1)) != NULL) && *p) 788#ifdef POSIX 789 setenv("MAKEFLAGS", p, 1); 790#else 791 setenv("MAKE", p, 1); 792#endif 793 free(p1); 794 795 /* 796 * For compatibility, look at the directories in the VPATH variable 797 * and add them to the search path, if the variable is defined. The 798 * variable's value is in the same format as the PATH envariable, i.e. 799 * <directory>:<directory>:<directory>... 800 */ 801 if (Var_Exists("VPATH", VAR_CMD)) { 802 char *vpath, savec; 803 /* 804 * GCC stores string constants in read-only memory, but 805 * Var_Subst will want to write this thing, so store it 806 * in an array 807 */ 808 static char VPATH[] = "${VPATH}"; 809 810 vpath = Var_Subst(NULL, VPATH, VAR_CMD, FALSE); 811 path = vpath; 812 do { 813 /* skip to end of directory */ 814 for (cp = path; *cp != ':' && *cp != '\0'; cp++) 815 continue; 816 /* Save terminator character so know when to stop */ 817 savec = *cp; 818 *cp = '\0'; 819 /* Add directory to search path */ 820 Dir_AddDir(dirSearchPath, path); 821 *cp = savec; 822 path = cp + 1; 823 } while (savec == ':'); 824 (void)free(vpath); 825 } 826 827 /* 828 * Now that all search paths have been read for suffixes et al, it's 829 * time to add the default search path to their lists... 830 */ 831 Suff_DoPaths(); 832 833 /* print the initial graph, if the user requested it */ 834 if (DEBUG(GRAPH1)) 835 Targ_PrintGraph(1); 836 837 /* print the values of any variables requested by the user */ 838 if (!Lst_IsEmpty(variables)) { 839 LstNode ln; 840 841 for (ln = Lst_First(variables); ln != NULL; 842 ln = Lst_Succ(ln)) { 843 char *value; 844 if (expandVars) { 845 p1 = emalloc(strlen((char *)Lst_Datum(ln)) + 1 + 3); 846 /* This sprintf is safe, because of the malloc above */ 847 (void)sprintf(p1, "${%s}", (char *)Lst_Datum(ln)); 848 value = Var_Subst(NULL, p1, VAR_GLOBAL, FALSE); 849 } else { 850 value = Var_Value((char *)Lst_Datum(ln), 851 VAR_GLOBAL, &p1); 852 } 853 printf("%s\n", value ? value : ""); 854 if (p1) 855 free(p1); 856 } 857 } else { 858 859 /* 860 * Have now read the entire graph and need to make a list of targets 861 * to create. If none was given on the command line, we consult the 862 * parsing module to find the main target(s) to create. 863 */ 864 if (Lst_IsEmpty(create)) 865 targs = Parse_MainName(); 866 else 867 targs = Targ_FindList(create, TARG_CREATE); 868 869 if (!compatMake) { 870 /* 871 * Initialize job module before traversing the graph, now that 872 * any .BEGIN and .END targets have been read. This is done 873 * only if the -q flag wasn't given (to prevent the .BEGIN from 874 * being executed should it exist). 875 */ 876 if (!queryFlag) { 877 if (maxLocal == -1) 878 maxLocal = maxJobs; 879 Job_Init(maxJobs, maxLocal); 880 jobsRunning = TRUE; 881 } 882 883 /* Traverse the graph, checking on all the targets */ 884 outOfDate = Make_Run(targs); 885 } else { 886 /* 887 * Compat_Init will take care of creating all the targets as 888 * well as initializing the module. 889 */ 890 Compat_Run(targs); 891 outOfDate = 0; 892 } 893 Lst_Destroy(targs, NOFREE); 894 } 895 896 Lst_Destroy(variables, NOFREE); 897 Lst_Destroy(makefiles, NOFREE); 898 Lst_Destroy(create, (void (*)(void *)) free); 899 900 /* print the graph now it's been processed if the user requested it */ 901 if (DEBUG(GRAPH2)) 902 Targ_PrintGraph(2); 903 904 Suff_End(); 905 Targ_End(); 906 Arch_End(); 907 str_end(); 908 Var_End(); 909 Parse_End(); 910 Dir_End(); 911 912 if (queryFlag && outOfDate) 913 return(1); 914 else 915 return(0); 916} 917 918/*- 919 * ReadMakefile -- 920 * Open and parse the given makefile. 921 * 922 * Results: 923 * TRUE if ok. FALSE if couldn't open file. 924 * 925 * Side Effects: 926 * lots 927 */ 928static Boolean 929ReadMakefile(void *p, void *q __unused) 930{ 931 char *fname; /* makefile to read */ 932 FILE *stream; 933 char *name, path[MAXPATHLEN]; 934 char *MAKEFILE; 935 int setMAKEFILE; 936 937 fname = p; 938 939 if (!strcmp(fname, "-")) { 940 Parse_File("(stdin)", stdin); 941 Var_Set("MAKEFILE", "", VAR_GLOBAL); 942 } else { 943 setMAKEFILE = strcmp(fname, ".depend"); 944 945 /* if we've chdir'd, rebuild the path name */ 946 if (curdir != objdir && *fname != '/') { 947 (void)snprintf(path, MAXPATHLEN, "%s/%s", curdir, fname); 948 /* 949 * XXX The realpath stuff breaks relative includes 950 * XXX in some cases. The problem likely is in 951 * XXX parse.c where it does special things in 952 * XXX ParseDoInclude if the file is relateive 953 * XXX or absolute and not a system file. There 954 * XXX it assumes that if the current file that's 955 * XXX being included is absolute, that any files 956 * XXX that it includes shouldn't do the -I path 957 * XXX stuff, which is inconsistant with historical 958 * XXX behavior. However, I can't pentrate the mists 959 * XXX further, so I'm putting this workaround in 960 * XXX here until such time as the underlying bug 961 * XXX can be fixed. 962 */ 963#if THIS_BREAKS_THINGS 964 if (realpath(path, path) != NULL && 965 (stream = fopen(path, "r")) != NULL) { 966 MAKEFILE = fname; 967 fname = path; 968 goto found; 969 } 970 } else if (realpath(fname, path) != NULL) { 971 MAKEFILE = fname; 972 fname = path; 973 if ((stream = fopen(fname, "r")) != NULL) 974 goto found; 975 } 976#else 977 if ((stream = fopen(path, "r")) != NULL) { 978 MAKEFILE = fname; 979 fname = path; 980 goto found; 981 } 982 } else { 983 MAKEFILE = fname; 984 if ((stream = fopen(fname, "r")) != NULL) 985 goto found; 986 } 987#endif 988 /* look in -I and system include directories. */ 989 name = Dir_FindFile(fname, parseIncPath); 990 if (!name) 991 name = Dir_FindFile(fname, sysIncPath); 992 if (!name || !(stream = fopen(name, "r"))) 993 return(FALSE); 994 MAKEFILE = fname = name; 995 /* 996 * set the MAKEFILE variable desired by System V fans -- the 997 * placement of the setting here means it gets set to the last 998 * makefile specified, as it is set by SysV make. 999 */ 1000found: 1001 if (setMAKEFILE) 1002 Var_Set("MAKEFILE", MAKEFILE, VAR_GLOBAL); 1003 Parse_File(fname, stream); 1004 (void)fclose(stream); 1005 } 1006 return(TRUE); 1007} 1008 1009/*- 1010 * Cmd_Exec -- 1011 * Execute the command in cmd, and return the output of that command 1012 * in a string. 1013 * 1014 * Results: 1015 * A string containing the output of the command, or the empty string 1016 * If error is not NULL, it contains the reason for the command failure 1017 * 1018 * Side Effects: 1019 * The string must be freed by the caller. 1020 */ 1021char * 1022Cmd_Exec(char *cmd, char **error) 1023{ 1024 char *args[4]; /* Args for invoking the shell */ 1025 int fds[2]; /* Pipe streams */ 1026 int cpid; /* Child PID */ 1027 int pid; /* PID from wait() */ 1028 char *res; /* result */ 1029 int status; /* command exit status */ 1030 Buffer buf; /* buffer to store the result */ 1031 char *cp; 1032 int cc; 1033 1034 *error = NULL; 1035 1036 /* 1037 * Set up arguments for shell 1038 */ 1039 args[0] = "sh"; 1040 args[1] = "-c"; 1041 args[2] = cmd; 1042 args[3] = NULL; 1043 1044 /* 1045 * Open a pipe for fetching its output 1046 */ 1047 if (pipe(fds) == -1) { 1048 *error = "Couldn't create pipe for \"%s\""; 1049 goto bad; 1050 } 1051 1052 /* 1053 * Fork 1054 */ 1055 switch (cpid = vfork()) { 1056 case 0: 1057 /* 1058 * Close input side of pipe 1059 */ 1060 (void) close(fds[0]); 1061 1062 /* 1063 * Duplicate the output stream to the shell's output, then 1064 * shut the extra thing down. Note we don't fetch the error 1065 * stream...why not? Why? 1066 */ 1067 (void) dup2(fds[1], 1); 1068 (void) close(fds[1]); 1069 1070#if defined(DEFSHELL) && DEFSHELL == 0 1071 (void) execv("/bin/csh", args); 1072#elif DEFSHELL == 1 1073 (void) execv("/bin/sh", args); 1074#elif DEFSHELL == 2 1075 (void) execv("/bin/ksh", args); 1076#else 1077#error "DEFSHELL must be 1 or 2." 1078#endif 1079 _exit(1); 1080 /*NOTREACHED*/ 1081 1082 case -1: 1083 *error = "Couldn't exec \"%s\""; 1084 goto bad; 1085 1086 default: 1087 /* 1088 * No need for the writing half 1089 */ 1090 (void) close(fds[1]); 1091 1092 buf = Buf_Init (MAKE_BSIZE); 1093 1094 do { 1095 char result[BUFSIZ]; 1096 cc = read(fds[0], result, sizeof(result)); 1097 if (cc > 0) 1098 Buf_AddBytes(buf, cc, (Byte *) result); 1099 } 1100 while (cc > 0 || (cc == -1 && errno == EINTR)); 1101 1102 /* 1103 * Close the input side of the pipe. 1104 */ 1105 (void) close(fds[0]); 1106 1107 /* 1108 * Wait for the process to exit. 1109 */ 1110 while(((pid = wait(&status)) != cpid) && (pid >= 0)) 1111 continue; 1112 1113 if (cc == -1) 1114 *error = "Error reading shell's output for \"%s\""; 1115 1116 res = (char *)Buf_GetAll (buf, &cc); 1117 Buf_Destroy (buf, FALSE); 1118 1119 if (status) 1120 *error = "\"%s\" returned non-zero status"; 1121 1122 /* 1123 * Null-terminate the result, convert newlines to spaces and 1124 * install it in the variable. 1125 */ 1126 res[cc] = '\0'; 1127 cp = &res[cc] - 1; 1128 1129 if (*cp == '\n') { 1130 /* 1131 * A final newline is just stripped 1132 */ 1133 *cp-- = '\0'; 1134 } 1135 while (cp >= res) { 1136 if (*cp == '\n') { 1137 *cp = ' '; 1138 } 1139 cp--; 1140 } 1141 break; 1142 } 1143 return res; 1144bad: 1145 res = emalloc(1); 1146 *res = '\0'; 1147 return res; 1148} 1149 1150/* 1151 * usage -- 1152 * exit with usage message 1153 */ 1154static void 1155usage(void) 1156{ 1157 (void)fprintf(stderr, "%s\n%s\n%s\n", 1158"usage: make [-BPSXeiknqrstv] [-C directory] [-D variable] [-d flags]", 1159" [-E variable] [-f makefile] [-I directory] [-j max_jobs]", 1160" [-m directory] [-V variable] [variable=value] [target ...]"); 1161 exit(2); 1162} 1163