main.c revision 120718
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 120718 2003-10-03 21:33:39Z 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 63#include <sys/types.h> 64#include <sys/time.h> 65#include <sys/param.h> 66#include <sys/resource.h> 67#include <sys/signal.h> 68#include <sys/stat.h> 69#if defined(__i386__) 70#include <sys/sysctl.h> 71#endif 72#ifndef MACHINE 73#include <sys/utsname.h> 74#endif 75#include <sys/wait.h> 76#include <err.h> 77#include <stdlib.h> 78#include <errno.h> 79#include <fcntl.h> 80#include <stdio.h> 81#include <sysexits.h> 82#include <stdarg.h> 83#include <unistd.h> 84#include "make.h" 85#include "hash.h" 86#include "dir.h" 87#include "job.h" 88#include "pathnames.h" 89 90#define WANT_ENV_MKLVL 1 91 92#ifndef DEFMAXLOCAL 93#define DEFMAXLOCAL DEFMAXJOBS 94#endif /* DEFMAXLOCAL */ 95 96#define MAKEFLAGS ".MAKEFLAGS" 97 98Lst create; /* Targets to be made */ 99time_t now; /* Time at start of make */ 100GNode *DEFAULT; /* .DEFAULT node */ 101Boolean allPrecious; /* .PRECIOUS given on line by itself */ 102 103static Boolean noBuiltins; /* -r flag */ 104static Lst makefiles; /* ordered list of makefiles to read */ 105static Boolean expandVars; /* fully expand printed variables */ 106static Lst variables; /* list of variables to print */ 107int maxJobs; /* -j argument */ 108static Boolean forceJobs; /* -j argument given */ 109static int maxLocal; /* -L argument */ 110Boolean compatMake; /* -B argument */ 111Boolean debug; /* -d flag */ 112Boolean noExecute; /* -n flag */ 113Boolean keepgoing; /* -k flag */ 114Boolean queryFlag; /* -q flag */ 115Boolean touchFlag; /* -t flag */ 116Boolean usePipes; /* !-P flag */ 117Boolean ignoreErrors; /* -i flag */ 118Boolean beSilent; /* -s flag */ 119Boolean beVerbose; /* -v flag */ 120Boolean oldVars; /* variable substitution style */ 121Boolean checkEnvFirst; /* -e flag */ 122Lst envFirstVars; /* (-E) vars to override from env */ 123Boolean jobsRunning; /* TRUE if the jobs might be running */ 124 125static void MainParseArgs(int, char **); 126char * chdir_verify_path(char *, char *); 127static int ReadMakefile(void *, void *); 128static void usage(void); 129 130static char *curdir; /* startup directory */ 131static char *objdir; /* where we chdir'ed to */ 132 133/*- 134 * MainParseArgs -- 135 * Parse a given argument vector. Called from main() and from 136 * Main_ParseArgLine() when the .MAKEFLAGS target is used. 137 * 138 * XXX: Deal with command line overriding .MAKEFLAGS in makefile 139 * 140 * Results: 141 * None 142 * 143 * Side Effects: 144 * Various global and local flags will be set depending on the flags 145 * given 146 */ 147static void 148MainParseArgs(int argc, char **argv) 149{ 150 char *p; 151 int c; 152 153 optind = 1; /* since we're called more than once */ 154#ifdef REMOTE 155# define OPTFLAGS "BC:D:E:I:L:PSV:Xd:ef:ij:km:nqrstv" 156#else 157# define OPTFLAGS "BC:D:E:I:PSV:Xd:ef:ij:km:nqrstv" 158#endif 159rearg: while((c = getopt(argc, argv, OPTFLAGS)) != -1) { 160 switch(c) { 161 case 'C': 162 if (chdir(optarg) == -1) 163 err(1, "chdir %s", optarg); 164 break; 165 case 'D': 166 Var_Set(optarg, "1", VAR_GLOBAL); 167 Var_Append(MAKEFLAGS, "-D", VAR_GLOBAL); 168 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); 169 break; 170 case 'I': 171 Parse_AddIncludeDir(optarg); 172 Var_Append(MAKEFLAGS, "-I", VAR_GLOBAL); 173 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); 174 break; 175 case 'V': 176 (void)Lst_AtEnd(variables, (void *)optarg); 177 Var_Append(MAKEFLAGS, "-V", VAR_GLOBAL); 178 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); 179 break; 180 case 'X': 181 expandVars = FALSE; 182 break; 183 case 'B': 184 compatMake = TRUE; 185 Var_Append(MAKEFLAGS, "-B", VAR_GLOBAL); 186 break; 187#ifdef REMOTE 188 case 'L': { 189 char *endptr; 190 191 maxLocal = strtol(optarg, &endptr, 10); 192 if (maxLocal < 0 || *endptr != '\0') { 193 warnx("illegal number, -L argument -- %s", 194 optarg); 195 usage(); 196 } 197 Var_Append(MAKEFLAGS, "-L", VAR_GLOBAL); 198 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); 199 break; 200 } 201#endif 202 case 'P': 203 usePipes = FALSE; 204 Var_Append(MAKEFLAGS, "-P", VAR_GLOBAL); 205 break; 206 case 'S': 207 keepgoing = FALSE; 208 Var_Append(MAKEFLAGS, "-S", VAR_GLOBAL); 209 break; 210 case 'd': { 211 char *modules = optarg; 212 213 for (; *modules; ++modules) 214 switch (*modules) { 215 case 'A': 216 debug = ~0; 217 break; 218 case 'a': 219 debug |= DEBUG_ARCH; 220 break; 221 case 'c': 222 debug |= DEBUG_COND; 223 break; 224 case 'd': 225 debug |= DEBUG_DIR; 226 break; 227 case 'f': 228 debug |= DEBUG_FOR; 229 break; 230 case 'g': 231 if (modules[1] == '1') { 232 debug |= DEBUG_GRAPH1; 233 ++modules; 234 } 235 else if (modules[1] == '2') { 236 debug |= DEBUG_GRAPH2; 237 ++modules; 238 } 239 break; 240 case 'j': 241 debug |= DEBUG_JOB; 242 break; 243 case 'l': 244 debug |= DEBUG_LOUD; 245 break; 246 case 'm': 247 debug |= DEBUG_MAKE; 248 break; 249 case 's': 250 debug |= DEBUG_SUFF; 251 break; 252 case 't': 253 debug |= DEBUG_TARG; 254 break; 255 case 'v': 256 debug |= DEBUG_VAR; 257 break; 258 default: 259 warnx("illegal argument to d option -- %c", *modules); 260 usage(); 261 } 262 Var_Append(MAKEFLAGS, "-d", VAR_GLOBAL); 263 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); 264 break; 265 } 266 case 'E': 267 p = emalloc(strlen(optarg) + 1); 268 (void)strcpy(p, optarg); 269 (void)Lst_AtEnd(envFirstVars, (void *)p); 270 Var_Append(MAKEFLAGS, "-E", VAR_GLOBAL); 271 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); 272 break; 273 case 'e': 274 checkEnvFirst = TRUE; 275 Var_Append(MAKEFLAGS, "-e", VAR_GLOBAL); 276 break; 277 case 'f': 278 (void)Lst_AtEnd(makefiles, (void *)optarg); 279 break; 280 case 'i': 281 ignoreErrors = TRUE; 282 Var_Append(MAKEFLAGS, "-i", VAR_GLOBAL); 283 break; 284 case 'j': { 285 char *endptr; 286 287 forceJobs = TRUE; 288 maxJobs = strtol(optarg, &endptr, 10); 289 if (maxJobs <= 0 || *endptr != '\0') { 290 warnx("illegal number, -j argument -- %s", 291 optarg); 292 usage(); 293 } 294#ifndef REMOTE 295 maxLocal = maxJobs; 296#endif 297 Var_Append(MAKEFLAGS, "-j", VAR_GLOBAL); 298 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); 299 break; 300 } 301 case 'k': 302 keepgoing = TRUE; 303 Var_Append(MAKEFLAGS, "-k", VAR_GLOBAL); 304 break; 305 case 'm': 306 Dir_AddDir(sysIncPath, optarg); 307 Var_Append(MAKEFLAGS, "-m", VAR_GLOBAL); 308 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); 309 break; 310 case 'n': 311 noExecute = TRUE; 312 Var_Append(MAKEFLAGS, "-n", VAR_GLOBAL); 313 break; 314 case 'q': 315 queryFlag = TRUE; 316 /* Kind of nonsensical, wot? */ 317 Var_Append(MAKEFLAGS, "-q", VAR_GLOBAL); 318 break; 319 case 'r': 320 noBuiltins = TRUE; 321 Var_Append(MAKEFLAGS, "-r", VAR_GLOBAL); 322 break; 323 case 's': 324 beSilent = TRUE; 325 Var_Append(MAKEFLAGS, "-s", VAR_GLOBAL); 326 break; 327 case 't': 328 touchFlag = TRUE; 329 Var_Append(MAKEFLAGS, "-t", VAR_GLOBAL); 330 break; 331 case 'v': 332 beVerbose = TRUE; 333 Var_Append(MAKEFLAGS, "-v", VAR_GLOBAL); 334 break; 335 default: 336 case '?': 337 usage(); 338 } 339 } 340 341 oldVars = TRUE; 342 343 /* 344 * See if the rest of the arguments are variable assignments and 345 * perform them if so. Else take them to be targets and stuff them 346 * on the end of the "create" list. 347 */ 348 for (argv += optind, argc -= optind; *argv; ++argv, --argc) 349 if (Parse_IsVar(*argv)) 350 Parse_DoVar(*argv, VAR_CMD); 351 else { 352 if (!**argv) 353 Punt("illegal (null) argument."); 354 if (**argv == '-') { 355 if ((*argv)[1]) 356 optind = 0; /* -flag... */ 357 else 358 optind = 1; /* - */ 359 goto rearg; 360 } 361 (void)Lst_AtEnd(create, (void *)estrdup(*argv)); 362 } 363} 364 365/*- 366 * Main_ParseArgLine -- 367 * Used by the parse module when a .MFLAGS or .MAKEFLAGS target 368 * is encountered and by main() when reading the .MAKEFLAGS envariable. 369 * Takes a line of arguments and breaks it into its 370 * component words and passes those words and the number of them to the 371 * MainParseArgs function. 372 * The line should have all its leading whitespace removed. 373 * 374 * Results: 375 * None 376 * 377 * Side Effects: 378 * Only those that come from the various arguments. 379 */ 380void 381Main_ParseArgLine(char *line) 382{ 383 char **argv; /* Manufactured argument vector */ 384 int argc; /* Number of arguments in argv */ 385 386 if (line == NULL) 387 return; 388 for (; *line == ' '; ++line) 389 continue; 390 if (!*line) 391 return; 392 393 argv = brk_string(line, &argc, TRUE); 394 MainParseArgs(argc, argv); 395} 396 397char * 398chdir_verify_path(char *path, char *obpath) 399{ 400 struct stat sb; 401 402 if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) { 403 if (chdir(path) == -1 || getcwd(obpath, MAXPATHLEN) == NULL) { 404 warn("warning: %s", path); 405 return 0; 406 } 407 return obpath; 408 } 409 410 return 0; 411} 412 413 414/*- 415 * main -- 416 * The main function, for obvious reasons. Initializes variables 417 * and a few modules, then parses the arguments give it in the 418 * environment and on the command line. Reads the system makefile 419 * followed by either Makefile, makefile or the file given by the 420 * -f argument. Sets the .MAKEFLAGS PMake variable based on all the 421 * flags it has received by then uses either the Make or the Compat 422 * module to create the initial list of targets. 423 * 424 * Results: 425 * If -q was given, exits -1 if anything was out-of-date. Else it exits 426 * 0. 427 * 428 * Side Effects: 429 * The program exits when done. Targets are created. etc. etc. etc. 430 */ 431int 432main(int argc, char **argv) 433{ 434 Lst targs; /* target nodes to create -- passed to Make_Init */ 435 Boolean outOfDate = TRUE; /* FALSE if all targets up to date */ 436 struct stat sa; 437 char *p, *p1, *path, *pathp; 438#ifdef WANT_ENV_MKLVL 439#define MKLVL_MAXVAL 500 440#define MKLVL_ENVVAR "__MKLVL__" 441 int iMkLvl = 0; 442 char *szMkLvl = getenv(MKLVL_ENVVAR); 443#endif /* WANT_ENV_MKLVL */ 444 char mdpath[MAXPATHLEN]; 445 char obpath[MAXPATHLEN]; 446 char cdpath[MAXPATHLEN]; 447 char *machine = getenv("MACHINE"); 448 char *machine_arch = getenv("MACHINE_ARCH"); 449 char *machine_cpu = getenv("MACHINE_CPU"); 450 Lst sysMkPath; /* Path of sys.mk */ 451 char *cp = NULL, *start; 452 /* avoid faults on read-only strings */ 453 static char syspath[] = _PATH_DEFSYSPATH; 454 455#ifdef WANT_ENV_MKLVL 456 if ((iMkLvl = szMkLvl ? atoi(szMkLvl) : 0) < 0) { 457 iMkLvl = 0; 458 } 459 if (iMkLvl++ > MKLVL_MAXVAL) { 460 errc(2, EAGAIN, 461 "Max recursion level (%d) exceeded.", MKLVL_MAXVAL); 462 } 463 bzero(szMkLvl = emalloc(32), 32); 464 sprintf(szMkLvl, "%d", iMkLvl); 465 setenv(MKLVL_ENVVAR, szMkLvl, 1); 466#endif /* WANT_ENV_MKLVL */ 467 468#if DEFSHELL == 2 469 /* 470 * Turn off ENV to make ksh happier. 471 */ 472 unsetenv("ENV"); 473#endif 474 475#ifdef RLIMIT_NOFILE 476 /* 477 * get rid of resource limit on file descriptors 478 */ 479 { 480 struct rlimit rl; 481 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 && 482 rl.rlim_cur != rl.rlim_max) { 483 rl.rlim_cur = rl.rlim_max; 484 (void) setrlimit(RLIMIT_NOFILE, &rl); 485 } 486 } 487#endif 488 489 /* 490 * PC-98 kernel sets the `i386' string to the utsname.machine and 491 * it cannot be distinguished from IBM-PC by uname(3). Therefore, 492 * we check machine.ispc98 and adjust the machine variable before 493 * using usname(3) below. 494 * NOTE: machdep.ispc98 was defined on 1998/8/31. At that time, 495 * __FreeBSD_version was defined as 300003. So, this check can 496 * safely be done with any kernel with version > 300003. 497 */ 498 if (!machine) { 499 int ispc98; 500 size_t len; 501 502 len = sizeof(ispc98); 503 if (!sysctlbyname("machdep.ispc98", &ispc98, &len, NULL, 0)) { 504 if (ispc98) 505 machine = "pc98"; 506 } 507 } 508 509 /* 510 * Get the name of this type of MACHINE from utsname 511 * so we can share an executable for similar machines. 512 * (i.e. m68k: amiga hp300, mac68k, sun3, ...) 513 * 514 * Note that while MACHINE is decided at run-time, 515 * MACHINE_ARCH is always known at compile time. 516 */ 517 if (!machine) { 518#ifndef MACHINE 519 struct utsname utsname; 520 521 if (uname(&utsname) == -1) 522 err(2, "uname"); 523 machine = utsname.machine; 524#else 525 machine = MACHINE; 526#endif 527 } 528 529 if (!machine_arch) { 530#ifndef MACHINE_ARCH 531 machine_arch = "unknown"; 532#else 533 machine_arch = MACHINE_ARCH; 534#endif 535 } 536 537 /* 538 * Set machine_cpu to the minumum supported CPU revision based 539 * on the target architecture, if not already set. 540 */ 541 if (!machine_cpu) { 542 if (!strcmp(machine_arch, "i386")) 543 machine_cpu = "i386"; 544 else if (!strcmp(machine_arch, "alpha")) 545 machine_cpu = "ev4"; 546 else 547 machine_cpu = "unknown"; 548 } 549 550 create = Lst_Init(FALSE); 551 makefiles = Lst_Init(FALSE); 552 envFirstVars = Lst_Init(FALSE); 553 expandVars = TRUE; 554 variables = Lst_Init(FALSE); 555 beSilent = FALSE; /* Print commands as executed */ 556 ignoreErrors = FALSE; /* Pay attention to non-zero returns */ 557 noExecute = FALSE; /* Execute all commands */ 558 keepgoing = FALSE; /* Stop on error */ 559 allPrecious = FALSE; /* Remove targets when interrupted */ 560 queryFlag = FALSE; /* This is not just a check-run */ 561 noBuiltins = FALSE; /* Read the built-in rules */ 562 touchFlag = FALSE; /* Actually update targets */ 563 usePipes = TRUE; /* Catch child output in pipes */ 564 debug = 0; /* No debug verbosity, please. */ 565 jobsRunning = FALSE; 566 567 maxLocal = DEFMAXLOCAL; /* Set default local max concurrency */ 568#ifdef REMOTE 569 maxJobs = DEFMAXJOBS; /* Set default max concurrency */ 570#else 571 maxJobs = maxLocal; 572#endif 573 forceJobs = FALSE; /* No -j flag */ 574 compatMake = FALSE; /* No compat mode */ 575 576 577 /* 578 * Initialize the parsing, directory and variable modules to prepare 579 * for the reading of inclusion paths and variable settings on the 580 * command line 581 */ 582 Dir_Init(); /* Initialize directory structures so -I flags 583 * can be processed correctly */ 584 Parse_Init(); /* Need to initialize the paths of #include 585 * directories */ 586 Var_Init(); /* As well as the lists of variables for 587 * parsing arguments */ 588 str_init(); 589 590 /* 591 * Initialize various variables. 592 * MAKE also gets this name, for compatibility 593 * .MAKEFLAGS gets set to the empty string just in case. 594 * MFLAGS also gets initialized empty, for compatibility. 595 */ 596 Var_Set("MAKE", argv[0], VAR_GLOBAL); 597 Var_Set(MAKEFLAGS, "", VAR_GLOBAL); 598 Var_Set("MFLAGS", "", VAR_GLOBAL); 599 Var_Set("MACHINE", machine, VAR_GLOBAL); 600 Var_Set("MACHINE_ARCH", machine_arch, VAR_GLOBAL); 601 Var_Set("MACHINE_CPU", machine_cpu, VAR_GLOBAL); 602#ifdef MAKE_VERSION 603 Var_Set("MAKE_VERSION", MAKE_VERSION, VAR_GLOBAL); 604#endif 605 606 /* 607 * First snag any flags out of the MAKE environment variable. 608 * (Note this is *not* MAKEFLAGS since /bin/make uses that and it's 609 * in a different format). 610 */ 611#ifdef POSIX 612 Main_ParseArgLine(getenv("MAKEFLAGS")); 613#else 614 Main_ParseArgLine(getenv("MAKE")); 615#endif 616 617 MainParseArgs(argc, argv); 618 619 /* 620 * Find where we are... 621 * All this code is so that we know where we are when we start up 622 * on a different machine with pmake. 623 */ 624 curdir = cdpath; 625 if (getcwd(curdir, MAXPATHLEN) == NULL) 626 err(2, NULL); 627 628 if (stat(curdir, &sa) == -1) 629 err(2, "%s", curdir); 630 631 /* 632 * The object directory location is determined using the 633 * following order of preference: 634 * 635 * 1. MAKEOBJDIRPREFIX`cwd` 636 * 2. MAKEOBJDIR 637 * 3. _PATH_OBJDIR.${MACHINE} 638 * 4. _PATH_OBJDIR 639 * 5. _PATH_OBJDIRPREFIX`cwd` 640 * 641 * If one of the first two fails, use the current directory. 642 * If the remaining three all fail, use the current directory. 643 * 644 * Once things are initted, 645 * have to add the original directory to the search path, 646 * and modify the paths for the Makefiles apropriately. The 647 * current directory is also placed as a variable for make scripts. 648 */ 649 if (!(pathp = getenv("MAKEOBJDIRPREFIX"))) { 650 if (!(path = getenv("MAKEOBJDIR"))) { 651 path = _PATH_OBJDIR; 652 pathp = _PATH_OBJDIRPREFIX; 653 (void) snprintf(mdpath, MAXPATHLEN, "%s.%s", 654 path, machine); 655 if (!(objdir = chdir_verify_path(mdpath, obpath))) 656 if (!(objdir=chdir_verify_path(path, obpath))) { 657 (void) snprintf(mdpath, MAXPATHLEN, 658 "%s%s", pathp, curdir); 659 if (!(objdir=chdir_verify_path(mdpath, 660 obpath))) 661 objdir = curdir; 662 } 663 } 664 else if (!(objdir = chdir_verify_path(path, obpath))) 665 objdir = curdir; 666 } 667 else { 668 (void) snprintf(mdpath, MAXPATHLEN, "%s%s", pathp, curdir); 669 if (!(objdir = chdir_verify_path(mdpath, obpath))) 670 objdir = curdir; 671 } 672 Dir_InitDot(); /* Initialize the "." directory */ 673 if (objdir != curdir) 674 Dir_AddDir(dirSearchPath, curdir); 675 Var_Set(".CURDIR", curdir, VAR_GLOBAL); 676 Var_Set(".OBJDIR", objdir, VAR_GLOBAL); 677 678 /* 679 * Be compatible if user did not specify -j and did not explicitly 680 * turned compatibility on 681 */ 682 if (!compatMake && !forceJobs) 683 compatMake = TRUE; 684 685 /* 686 * Initialize archive, target and suffix modules in preparation for 687 * parsing the makefile(s) 688 */ 689 Arch_Init(); 690 Targ_Init(); 691 Suff_Init(); 692 693 DEFAULT = NULL; 694 (void)time(&now); 695 696 /* 697 * Set up the .TARGETS variable to contain the list of targets to be 698 * created. If none specified, make the variable empty -- the parser 699 * will fill the thing in with the default or .MAIN target. 700 */ 701 if (!Lst_IsEmpty(create)) { 702 LstNode ln; 703 704 for (ln = Lst_First(create); ln != NULL; 705 ln = Lst_Succ(ln)) { 706 char *name = (char *)Lst_Datum(ln); 707 708 Var_Append(".TARGETS", name, VAR_GLOBAL); 709 } 710 } else 711 Var_Set(".TARGETS", "", VAR_GLOBAL); 712 713 714 /* 715 * If no user-supplied system path was given (through the -m option) 716 * add the directories from the DEFSYSPATH (more than one may be given 717 * as dir1:...:dirn) to the system include path. 718 */ 719 if (Lst_IsEmpty(sysIncPath)) { 720 for (start = syspath; *start != '\0'; start = cp) { 721 for (cp = start; *cp != '\0' && *cp != ':'; cp++) 722 continue; 723 if (*cp == '\0') { 724 Dir_AddDir(sysIncPath, start); 725 } else { 726 *cp++ = '\0'; 727 Dir_AddDir(sysIncPath, start); 728 } 729 } 730 } 731 732 /* 733 * Read in the built-in rules first, followed by the specified 734 * makefile, if it was (makefile != (char *) NULL), or the default 735 * Makefile and makefile, in that order, if it wasn't. 736 */ 737 if (!noBuiltins) { 738 LstNode ln; 739 740 sysMkPath = Lst_Init (FALSE); 741 Dir_Expand (_PATH_DEFSYSMK, sysIncPath, sysMkPath); 742 if (Lst_IsEmpty(sysMkPath)) 743 Fatal("make: no system rules (%s).", _PATH_DEFSYSMK); 744 ln = Lst_Find(sysMkPath, (void *)NULL, ReadMakefile); 745 if (ln != NULL) 746 Fatal("make: cannot open %s.", (char *)Lst_Datum(ln)); 747 } 748 749 if (!Lst_IsEmpty(makefiles)) { 750 LstNode ln; 751 752 ln = Lst_Find(makefiles, (void *)NULL, ReadMakefile); 753 if (ln != NULL) 754 Fatal("make: cannot open %s.", (char *)Lst_Datum(ln)); 755 } else if (!ReadMakefile("BSDmakefile", NULL)) 756 if (!ReadMakefile("makefile", NULL)) 757 (void)ReadMakefile("Makefile", NULL); 758 759 (void)ReadMakefile(".depend", NULL); 760 761 Var_Append("MFLAGS", Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1), VAR_GLOBAL); 762 free(p1); 763 764 /* Install all the flags into the MAKE envariable. */ 765 if (((p = Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1)) != NULL) && *p) 766#ifdef POSIX 767 setenv("MAKEFLAGS", p, 1); 768#else 769 setenv("MAKE", p, 1); 770#endif 771 free(p1); 772 773 /* 774 * For compatibility, look at the directories in the VPATH variable 775 * and add them to the search path, if the variable is defined. The 776 * variable's value is in the same format as the PATH envariable, i.e. 777 * <directory>:<directory>:<directory>... 778 */ 779 if (Var_Exists("VPATH", VAR_CMD)) { 780 char *vpath, savec; 781 /* 782 * GCC stores string constants in read-only memory, but 783 * Var_Subst will want to write this thing, so store it 784 * in an array 785 */ 786 static char VPATH[] = "${VPATH}"; 787 788 vpath = Var_Subst(NULL, VPATH, VAR_CMD, FALSE); 789 path = vpath; 790 do { 791 /* skip to end of directory */ 792 for (cp = path; *cp != ':' && *cp != '\0'; cp++) 793 continue; 794 /* Save terminator character so know when to stop */ 795 savec = *cp; 796 *cp = '\0'; 797 /* Add directory to search path */ 798 Dir_AddDir(dirSearchPath, path); 799 *cp = savec; 800 path = cp + 1; 801 } while (savec == ':'); 802 (void)free(vpath); 803 } 804 805 /* 806 * Now that all search paths have been read for suffixes et al, it's 807 * time to add the default search path to their lists... 808 */ 809 Suff_DoPaths(); 810 811 /* print the initial graph, if the user requested it */ 812 if (DEBUG(GRAPH1)) 813 Targ_PrintGraph(1); 814 815 /* print the values of any variables requested by the user */ 816 if (!Lst_IsEmpty(variables)) { 817 LstNode ln; 818 819 for (ln = Lst_First(variables); ln != NULL; 820 ln = Lst_Succ(ln)) { 821 char *value; 822 if (expandVars) { 823 p1 = emalloc(strlen((char *)Lst_Datum(ln)) + 1 + 3); 824 /* This sprintf is safe, because of the malloc above */ 825 (void)sprintf(p1, "${%s}", (char *)Lst_Datum(ln)); 826 value = Var_Subst(NULL, p1, VAR_GLOBAL, FALSE); 827 } else { 828 value = Var_Value((char *)Lst_Datum(ln), 829 VAR_GLOBAL, &p1); 830 } 831 printf("%s\n", value ? value : ""); 832 if (p1) 833 free(p1); 834 } 835 } else { 836 837 /* 838 * Have now read the entire graph and need to make a list of targets 839 * to create. If none was given on the command line, we consult the 840 * parsing module to find the main target(s) to create. 841 */ 842 if (Lst_IsEmpty(create)) 843 targs = Parse_MainName(); 844 else 845 targs = Targ_FindList(create, TARG_CREATE); 846 847 if (!compatMake) { 848 /* 849 * Initialize job module before traversing the graph, now that 850 * any .BEGIN and .END targets have been read. This is done 851 * only if the -q flag wasn't given (to prevent the .BEGIN from 852 * being executed should it exist). 853 */ 854 if (!queryFlag) { 855 if (maxLocal == -1) 856 maxLocal = maxJobs; 857 Job_Init(maxJobs, maxLocal); 858 jobsRunning = TRUE; 859 } 860 861 /* Traverse the graph, checking on all the targets */ 862 outOfDate = Make_Run(targs); 863 } else { 864 /* 865 * Compat_Init will take care of creating all the targets as 866 * well as initializing the module. 867 */ 868 Compat_Run(targs); 869 outOfDate = 0; 870 } 871 Lst_Destroy(targs, NOFREE); 872 } 873 874 Lst_Destroy(variables, NOFREE); 875 Lst_Destroy(makefiles, NOFREE); 876 Lst_Destroy(create, (void (*)(void *)) free); 877 878 /* print the graph now it's been processed if the user requested it */ 879 if (DEBUG(GRAPH2)) 880 Targ_PrintGraph(2); 881 882 Suff_End(); 883 Targ_End(); 884 Arch_End(); 885 str_end(); 886 Var_End(); 887 Parse_End(); 888 Dir_End(); 889 890 if (queryFlag && outOfDate) 891 return(1); 892 else 893 return(0); 894} 895 896/*- 897 * ReadMakefile -- 898 * Open and parse the given makefile. 899 * 900 * Results: 901 * TRUE if ok. FALSE if couldn't open file. 902 * 903 * Side Effects: 904 * lots 905 */ 906static Boolean 907ReadMakefile(void *p, void *q __unused) 908{ 909 char *fname; /* makefile to read */ 910 FILE *stream; 911 char *name, path[MAXPATHLEN]; 912 char *MAKEFILE; 913 int setMAKEFILE; 914 915 fname = p; 916 917 if (!strcmp(fname, "-")) { 918 Parse_File("(stdin)", stdin); 919 Var_Set("MAKEFILE", "", VAR_GLOBAL); 920 } else { 921 setMAKEFILE = strcmp(fname, ".depend"); 922 923 /* if we've chdir'd, rebuild the path name */ 924 if (curdir != objdir && *fname != '/') { 925 (void)snprintf(path, MAXPATHLEN, "%s/%s", curdir, fname); 926 /* 927 * XXX The realpath stuff breaks relative includes 928 * XXX in some cases. The problem likely is in 929 * XXX parse.c where it does special things in 930 * XXX ParseDoInclude if the file is relateive 931 * XXX or absolute and not a system file. There 932 * XXX it assumes that if the current file that's 933 * XXX being included is absolute, that any files 934 * XXX that it includes shouldn't do the -I path 935 * XXX stuff, which is inconsistant with historical 936 * XXX behavior. However, I can't pentrate the mists 937 * XXX further, so I'm putting this workaround in 938 * XXX here until such time as the underlying bug 939 * XXX can be fixed. 940 */ 941#if THIS_BREAKS_THINGS 942 if (realpath(path, path) != NULL && 943 (stream = fopen(path, "r")) != NULL) { 944 MAKEFILE = fname; 945 fname = path; 946 goto found; 947 } 948 } else if (realpath(fname, path) != NULL) { 949 MAKEFILE = fname; 950 fname = path; 951 if ((stream = fopen(fname, "r")) != NULL) 952 goto found; 953 } 954#else 955 if ((stream = fopen(path, "r")) != NULL) { 956 MAKEFILE = fname; 957 fname = path; 958 goto found; 959 } 960 } else { 961 MAKEFILE = fname; 962 if ((stream = fopen(fname, "r")) != NULL) 963 goto found; 964 } 965#endif 966 /* look in -I and system include directories. */ 967 name = Dir_FindFile(fname, parseIncPath); 968 if (!name) 969 name = Dir_FindFile(fname, sysIncPath); 970 if (!name || !(stream = fopen(name, "r"))) 971 return(FALSE); 972 MAKEFILE = fname = name; 973 /* 974 * set the MAKEFILE variable desired by System V fans -- the 975 * placement of the setting here means it gets set to the last 976 * makefile specified, as it is set by SysV make. 977 */ 978found: 979 if (setMAKEFILE) 980 Var_Set("MAKEFILE", MAKEFILE, VAR_GLOBAL); 981 Parse_File(fname, stream); 982 (void)fclose(stream); 983 } 984 return(TRUE); 985} 986 987/*- 988 * Cmd_Exec -- 989 * Execute the command in cmd, and return the output of that command 990 * in a string. 991 * 992 * Results: 993 * A string containing the output of the command, or the empty string 994 * If error is not NULL, it contains the reason for the command failure 995 * 996 * Side Effects: 997 * The string must be freed by the caller. 998 */ 999char * 1000Cmd_Exec(char *cmd, char **error) 1001{ 1002 char *args[4]; /* Args for invoking the shell */ 1003 int fds[2]; /* Pipe streams */ 1004 int cpid; /* Child PID */ 1005 int pid; /* PID from wait() */ 1006 char *res; /* result */ 1007 int status; /* command exit status */ 1008 Buffer buf; /* buffer to store the result */ 1009 char *cp; 1010 int cc; 1011 1012 *error = NULL; 1013 1014 /* 1015 * Set up arguments for shell 1016 */ 1017 args[0] = "sh"; 1018 args[1] = "-c"; 1019 args[2] = cmd; 1020 args[3] = NULL; 1021 1022 /* 1023 * Open a pipe for fetching its output 1024 */ 1025 if (pipe(fds) == -1) { 1026 *error = "Couldn't create pipe for \"%s\""; 1027 goto bad; 1028 } 1029 1030 /* 1031 * Fork 1032 */ 1033 switch (cpid = vfork()) { 1034 case 0: 1035 /* 1036 * Close input side of pipe 1037 */ 1038 (void) close(fds[0]); 1039 1040 /* 1041 * Duplicate the output stream to the shell's output, then 1042 * shut the extra thing down. Note we don't fetch the error 1043 * stream...why not? Why? 1044 */ 1045 (void) dup2(fds[1], 1); 1046 (void) close(fds[1]); 1047 1048#if defined(DEFSHELL) && DEFSHELL == 0 1049 (void) execv("/bin/csh", args); 1050#elif DEFSHELL == 1 1051 (void) execv("/bin/sh", args); 1052#elif DEFSHELL == 2 1053 (void) execv("/bin/ksh", args); 1054#else 1055#error "DEFSHELL must be 1 or 2." 1056#endif 1057 _exit(1); 1058 /*NOTREACHED*/ 1059 1060 case -1: 1061 *error = "Couldn't exec \"%s\""; 1062 goto bad; 1063 1064 default: 1065 /* 1066 * No need for the writing half 1067 */ 1068 (void) close(fds[1]); 1069 1070 buf = Buf_Init (MAKE_BSIZE); 1071 1072 do { 1073 char result[BUFSIZ]; 1074 cc = read(fds[0], result, sizeof(result)); 1075 if (cc > 0) 1076 Buf_AddBytes(buf, cc, (Byte *) result); 1077 } 1078 while (cc > 0 || (cc == -1 && errno == EINTR)); 1079 1080 /* 1081 * Close the input side of the pipe. 1082 */ 1083 (void) close(fds[0]); 1084 1085 /* 1086 * Wait for the process to exit. 1087 */ 1088 while(((pid = wait(&status)) != cpid) && (pid >= 0)) 1089 continue; 1090 1091 if (cc == -1) 1092 *error = "Error reading shell's output for \"%s\""; 1093 1094 res = (char *)Buf_GetAll (buf, &cc); 1095 Buf_Destroy (buf, FALSE); 1096 1097 if (status) 1098 *error = "\"%s\" returned non-zero status"; 1099 1100 /* 1101 * Null-terminate the result, convert newlines to spaces and 1102 * install it in the variable. 1103 */ 1104 res[cc] = '\0'; 1105 cp = &res[cc] - 1; 1106 1107 if (*cp == '\n') { 1108 /* 1109 * A final newline is just stripped 1110 */ 1111 *cp-- = '\0'; 1112 } 1113 while (cp >= res) { 1114 if (*cp == '\n') { 1115 *cp = ' '; 1116 } 1117 cp--; 1118 } 1119 break; 1120 } 1121 return res; 1122bad: 1123 res = emalloc(1); 1124 *res = '\0'; 1125 return res; 1126} 1127 1128/* 1129 * usage -- 1130 * exit with usage message 1131 */ 1132static void 1133usage(void) 1134{ 1135 (void)fprintf(stderr, "%s\n%s\n%s\n", 1136"usage: make [-BPSXeiknqrstv] [-C directory] [-D variable] [-d flags]", 1137" [-E variable] [-f makefile] [-I directory] [-j max_jobs]", 1138" [-m directory] [-V variable] [variable=value] [target ...]"); 1139 exit(2); 1140} 1141