1 /* $NetBSD: main.c,v 1.137 2006/11/17 22:07:39 dsl Exp $ */ 2 3 /* 4 * Copyright (c) 1988, 1989, 1990, 1993 5 * The Regents of the University of California. 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. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 /* 36 * Copyright (c) 1989 by Berkeley Softworks 37 * All rights reserved. 38 * 39 * This code is derived from software contributed to Berkeley by 40 * Adam de Boor. 41 * 42 * Redistribution and use in source and binary forms, with or without 43 * modification, are permitted provided that the following conditions 44 * are met: 45 * 1. Redistributions of source code must retain the above copyright 46 * notice, this list of conditions and the following disclaimer. 47 * 2. Redistributions in binary form must reproduce the above copyright 48 * notice, this list of conditions and the following disclaimer in the 49 * documentation and/or other materials provided with the distribution. 50 * 3. All advertising materials mentioning features or use of this software 51 * must display the following acknowledgement: 52 * This product includes software developed by the University of 53 * California, Berkeley and its contributors. 54 * 4. Neither the name of the University nor the names of its contributors 55 * may be used to endorse or promote products derived from this software 56 * without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 68 * SUCH DAMAGE. 69 */ 70 71 #ifndef MAKE_NATIVE 72 static char rcsid[] = "$NetBSD: main.c,v 1.137 2006/11/17 22:07:39 dsl Exp $"; 73 #else 74 #include <sys/cdefs.h> 75 #ifndef lint 76 __COPYRIGHT("@(#) Copyright (c) 1988, 1989, 1990, 1993\n\ 77 The Regents of the University of California. All rights reserved.\n"); 78 #endif /* not lint */ 79 80 #ifndef lint 81 #if 0 82 static char sccsid[] = "@(#)main.c 8.3 (Berkeley) 3/19/94"; 83 #else 84 __RCSID("$NetBSD: main.c,v 1.137 2006/11/17 22:07:39 dsl Exp $"); 85 #endif 86 #endif /* not lint */ 87 #endif 88 89 /*- 90 * main.c -- 91 * The main file for this entire program. Exit routines etc 92 * reside here. 93 * 94 * Utility functions defined in this file: 95 * Main_ParseArgLine Takes a line of arguments, breaks them and 96 * treats them as if they were given when first 97 * invoked. Used by the parse module to implement 98 * the .MFLAGS target. 99 * 100 * Error Print a tagged error message. The global 101 * MAKE variable must have been defined. This 102 * takes a format string and two optional 103 * arguments for it. 104 * 105 * Fatal Print an error message and exit. Also takes 106 * a format string and two arguments. 107 * 108 * Punt Aborts all jobs and exits with a message. Also 109 * takes a format string and two arguments. 110 * 111 * Finish Finish things up by printing the number of 112 * errors which occurred, as passed to it, and 113 * exiting. 114 */ 115 116 #include <sys/types.h> 117 #include <sys/time.h> 118 #include <sys/param.h> 119 #include <sys/resource.h> 120 #include <sys/signal.h> 121 #include <sys/stat.h> 122 #ifdef MAKE_NATIVE 123 #include <sys/utsname.h> 124 #endif 125 #include <sys/wait.h> 126 127 #include <errno.h> 128 #include <fcntl.h> 129 #include <stdarg.h> 130 #include <stdio.h> 131 #include <stdlib.h> 132 #include <time.h> 133 134 #include "make.h" 135 #include "hash.h" 136 #include "dir.h" 137 #include "job.h" 138 #include "pathnames.h" 139 #include "trace.h" 140 141 #ifdef USE_IOVEC 142 #include <sys/uio.h> 143 #endif 144 145 #ifndef DEFMAXLOCAL 146 #define DEFMAXLOCAL DEFMAXJOBS 147 #endif /* DEFMAXLOCAL */ 148 149 Lst create; /* Targets to be made */ 150 time_t now; /* Time at start of make */ 151 GNode *DEFAULT; /* .DEFAULT node */ 152 Boolean allPrecious; /* .PRECIOUS given on line by itself */ 153 154 static Boolean noBuiltins; /* -r flag */ 155 static Lst makefiles; /* ordered list of makefiles to read */ 156 static Boolean printVars; /* print value of one or more vars */ 157 static Lst variables; /* list of variables to print */ 158 int maxJobs; /* -j argument */ 159 static int maxJobTokens; /* -j argument */ 160 Boolean compatMake; /* -B argument */ 161 int debug; /* -d argument */ 162 Boolean noExecute; /* -n flag */ 163 Boolean noRecursiveExecute; /* -N flag */ 164 Boolean keepgoing; /* -k flag */ 165 Boolean queryFlag; /* -q flag */ 166 Boolean touchFlag; /* -t flag */ 167 Boolean ignoreErrors; /* -i flag */ 168 Boolean beSilent; /* -s flag */ 169 Boolean oldVars; /* variable substitution style */ 170 Boolean checkEnvFirst; /* -e flag */ 171 Boolean parseWarnFatal; /* -W flag */ 172 Boolean jobServer; /* -J flag */ 173 static int jp_0 = -1, jp_1 = -1; /* ends of parent job pipe */ 174 Boolean varNoExportEnv; /* -X flag */ 175 static Boolean jobsRunning; /* TRUE if the jobs might be running */ 176 static const char * tracefile; 177 static char * Check_Cwd_av(int, char **, int); 178 static void MainParseArgs(int, char **); 179 static int ReadMakefile(ClientData, ClientData); 180 static void usage(void); 181 182 static char curdir[MAXPATHLEN + 1]; /* startup directory */ 183 static char objdir[MAXPATHLEN + 1]; /* where we chdir'ed to */ 184 char *progname; /* the program name */ 185 186 Boolean forceJobs = FALSE; 187 188 extern Lst parseIncPath; 189 190 static void 191 parse_debug_options(const char *argvalue) 192 { 193 const char *modules; 194 const char *mode; 195 char *fname; 196 int len; 197 198 for (modules = argvalue; *modules; ++modules) { 199 switch (*modules) { 200 case 'A': 201 debug = ~0; 202 break; 203 case 'a': 204 debug |= DEBUG_ARCH; 205 break; 206 case 'c': 207 debug |= DEBUG_COND; 208 break; 209 case 'd': 210 debug |= DEBUG_DIR; 211 break; 212 case 'e': 213 debug |= DEBUG_ERROR; 214 break; 215 case 'f': 216 debug |= DEBUG_FOR; 217 break; 218 case 'g': 219 if (modules[1] == '1') { 220 debug |= DEBUG_GRAPH1; 221 ++modules; 222 } 223 else if (modules[1] == '2') { 224 debug |= DEBUG_GRAPH2; 225 ++modules; 226 } 227 else if (modules[1] == '3') { 228 debug |= DEBUG_GRAPH3; 229 ++modules; 230 } 231 break; 232 case 'j': 233 debug |= DEBUG_JOB; 234 break; 235 case 'm': 236 debug |= DEBUG_MAKE; 237 break; 238 case 'n': 239 debug |= DEBUG_SCRIPT; 240 break; 241 case 'p': 242 debug |= DEBUG_PARSE; 243 break; 244 case 's': 245 debug |= DEBUG_SUFF; 246 break; 247 case 't': 248 debug |= DEBUG_TARG; 249 break; 250 case 'v': 251 debug |= DEBUG_VAR; 252 break; 253 case 'x': 254 debug |= DEBUG_SHELL; 255 break; 256 case 'F': 257 if (debug_file != stdout && debug_file != stderr) 258 fclose(debug_file); 259 if (*++modules == '+') 260 mode = "a"; 261 else { 262 if (!strcmp(modules, "stdout")) { 263 debug_file = stdout; 264 return; 265 } 266 if (!strcmp(modules, "stderr")) { 267 debug_file = stderr; 268 return; 269 } 270 mode = "w"; 271 } 272 len = strlen(modules); 273 fname = malloc(len + 20); 274 memcpy(fname, modules, len + 1); 275 /* Let the filename be modified by the pid */ 276 if (strcmp(fname + len - 3, ".%d") == 0) 277 snprintf(fname + len - 2, 20, "%d", getpid()); 278 debug_file = fopen(fname, mode); 279 if (!debug_file) { 280 fprintf(stderr, "Cannot open debug file %s", 281 fname); 282 usage(); 283 } 284 free(fname); 285 /* Have this non-buffered */ 286 setbuf(debug_file, NULL); 287 return; 288 default: 289 (void)fprintf(stderr, 290 "%s: illegal argument to d option -- %c\n", 291 progname, *modules); 292 usage(); 293 } 294 } 295 } 296 297 /*- 298 * MainParseArgs -- 299 * Parse a given argument vector. Called from main() and from 300 * Main_ParseArgLine() when the .MAKEFLAGS target is used. 301 * 302 * XXX: Deal with command line overriding .MAKEFLAGS in makefile 303 * 304 * Results: 305 * None 306 * 307 * Side Effects: 308 * Various global and local flags will be set depending on the flags 309 * given 310 */ 311 static void 312 MainParseArgs(int argc, char **argv) 313 { 314 char *p; 315 int c = '?'; 316 int arginc; 317 char *argvalue; 318 const char *getopt_def; 319 char *optscan; 320 Boolean inOption, dashDash = FALSE; 321 char found_path[MAXPATHLEN + 1]; /* for searching for sys.mk */ 322 323 #define OPTFLAGS "BD:I:J:NST:V:WXd:ef:ij:km:nqrst" 324 /* Can't actually use getopt(3) because rescanning is not portable */ 325 326 getopt_def = OPTFLAGS; 327 rearg: 328 inOption = FALSE; 329 optscan = NULL; 330 while(argc > 1) { 331 char *getopt_spec; 332 if(!inOption) 333 optscan = argv[1]; 334 c = *optscan++; 335 arginc = 0; 336 if(inOption) { 337 if(c == '\0') { 338 ++argv; 339 --argc; 340 inOption = FALSE; 341 continue; 342 } 343 } else { 344 if (c != '-' || dashDash) 345 break; 346 inOption = TRUE; 347 c = *optscan++; 348 } 349 /* '-' found at some earlier point */ 350 getopt_spec = strchr(getopt_def, c); 351 if(c != '\0' && getopt_spec != NULL && getopt_spec[1] == ':') { 352 /* -<something> found, and <something> should have an arg */ 353 inOption = FALSE; 354 arginc = 1; 355 argvalue = optscan; 356 if(*argvalue == '\0') { 357 if (argc < 3) 358 goto noarg; 359 argvalue = argv[2]; 360 arginc = 2; 361 } 362 } else { 363 argvalue = NULL; 364 } 365 switch(c) { 366 case '\0': 367 arginc = 1; 368 inOption = FALSE; 369 break; 370 case 'B': 371 compatMake = TRUE; 372 Var_Append(MAKEFLAGS, "-B", VAR_GLOBAL); 373 break; 374 case 'D': 375 if (argvalue == NULL) goto noarg; 376 Var_Set(argvalue, "1", VAR_GLOBAL, 0); 377 Var_Append(MAKEFLAGS, "-D", VAR_GLOBAL); 378 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 379 break; 380 case 'I': 381 if (argvalue == NULL) goto noarg; 382 Parse_AddIncludeDir(argvalue); 383 Var_Append(MAKEFLAGS, "-I", VAR_GLOBAL); 384 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 385 break; 386 case 'J': 387 if (argvalue == NULL) goto noarg; 388 if (sscanf(argvalue, "%d,%d", &jp_0, &jp_1) != 2) { 389 (void)fprintf(stderr, 390 "%s: internal error -- J option malformed (%s)\n", 391 progname, argvalue); 392 usage(); 393 } 394 if ((fcntl(jp_0, F_GETFD, 0) < 0) || 395 (fcntl(jp_1, F_GETFD, 0) < 0)) { 396 #if 0 397 (void)fprintf(stderr, 398 "%s: ###### warning -- J descriptors were closed!\n", 399 progname); 400 exit(2); 401 #endif 402 jp_0 = -1; 403 jp_1 = -1; 404 compatMake = TRUE; 405 } else { 406 Var_Append(MAKEFLAGS, "-J", VAR_GLOBAL); 407 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 408 jobServer = TRUE; 409 } 410 break; 411 case 'N': 412 noExecute = TRUE; 413 noRecursiveExecute = TRUE; 414 Var_Append(MAKEFLAGS, "-N", VAR_GLOBAL); 415 break; 416 case 'S': 417 keepgoing = FALSE; 418 Var_Append(MAKEFLAGS, "-S", VAR_GLOBAL); 419 break; 420 case 'T': 421 if (argvalue == NULL) goto noarg; 422 tracefile = estrdup(argvalue); 423 Var_Append(MAKEFLAGS, "-T", VAR_GLOBAL); 424 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 425 break; 426 case 'V': 427 if (argvalue == NULL) goto noarg; 428 printVars = TRUE; 429 (void)Lst_AtEnd(variables, argvalue); 430 Var_Append(MAKEFLAGS, "-V", VAR_GLOBAL); 431 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 432 break; 433 case 'W': 434 parseWarnFatal = TRUE; 435 break; 436 case 'X': 437 varNoExportEnv = TRUE; 438 Var_Append(MAKEFLAGS, "-X", VAR_GLOBAL); 439 break; 440 case 'd': 441 if (argvalue == NULL) goto noarg; 442 /* If '-d-opts' don't pass to children */ 443 if (argvalue[0] == '-') 444 argvalue++; 445 else { 446 Var_Append(MAKEFLAGS, "-d", VAR_GLOBAL); 447 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 448 } 449 parse_debug_options(argvalue); 450 break; 451 case 'e': 452 checkEnvFirst = TRUE; 453 Var_Append(MAKEFLAGS, "-e", VAR_GLOBAL); 454 break; 455 case 'f': 456 if (argvalue == NULL) goto noarg; 457 (void)Lst_AtEnd(makefiles, argvalue); 458 break; 459 case 'i': 460 ignoreErrors = TRUE; 461 Var_Append(MAKEFLAGS, "-i", VAR_GLOBAL); 462 break; 463 case 'j': 464 if (argvalue == NULL) goto noarg; 465 forceJobs = TRUE; 466 maxJobs = strtol(argvalue, &p, 0); 467 if (*p != '\0' || maxJobs < 1) { 468 (void)fprintf(stderr, "%s: illegal argument to -j -- must be positive integer!\n", 469 progname); 470 exit(1); 471 } 472 Var_Append(MAKEFLAGS, "-j", VAR_GLOBAL); 473 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 474 maxJobTokens = maxJobs; 475 break; 476 case 'k': 477 keepgoing = TRUE; 478 Var_Append(MAKEFLAGS, "-k", VAR_GLOBAL); 479 break; 480 case 'm': 481 if (argvalue == NULL) goto noarg; 482 /* look for magic parent directory search string */ 483 if (strncmp(".../", argvalue, 4) == 0) { 484 if (!Dir_FindHereOrAbove(curdir, argvalue+4, 485 found_path, sizeof(found_path))) 486 break; /* nothing doing */ 487 (void)Dir_AddDir(sysIncPath, found_path); 488 489 } else { 490 (void)Dir_AddDir(sysIncPath, argvalue); 491 } 492 Var_Append(MAKEFLAGS, "-m", VAR_GLOBAL); 493 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 494 break; 495 case 'n': 496 noExecute = TRUE; 497 Var_Append(MAKEFLAGS, "-n", VAR_GLOBAL); 498 break; 499 case 'q': 500 queryFlag = TRUE; 501 /* Kind of nonsensical, wot? */ 502 Var_Append(MAKEFLAGS, "-q", VAR_GLOBAL); 503 break; 504 case 'r': 505 noBuiltins = TRUE; 506 Var_Append(MAKEFLAGS, "-r", VAR_GLOBAL); 507 break; 508 case 's': 509 beSilent = TRUE; 510 Var_Append(MAKEFLAGS, "-s", VAR_GLOBAL); 511 break; 512 case 't': 513 touchFlag = TRUE; 514 Var_Append(MAKEFLAGS, "-t", VAR_GLOBAL); 515 break; 516 case '-': 517 dashDash = TRUE; 518 break; 519 default: 520 case '?': 521 usage(); 522 } 523 argv += arginc; 524 argc -= arginc; 525 } 526 527 oldVars = TRUE; 528 529 /* 530 * See if the rest of the arguments are variable assignments and 531 * perform them if so. Else take them to be targets and stuff them 532 * on the end of the "create" list. 533 */ 534 for (; argc > 1; ++argv, --argc) 535 if (Parse_IsVar(argv[1])) { 536 Parse_DoVar(argv[1], VAR_CMD); 537 } else { 538 if (!*argv[1]) 539 Punt("illegal (null) argument."); 540 if (*argv[1] == '-' && !dashDash) 541 goto rearg; 542 (void)Lst_AtEnd(create, estrdup(argv[1])); 543 } 544 545 return; 546 noarg: 547 (void)fprintf(stderr, "%s: option requires an argument -- %c\n", 548 progname, c); 549 usage(); 550 } 551 552 /*- 553 * Main_ParseArgLine -- 554 * Used by the parse module when a .MFLAGS or .MAKEFLAGS target 555 * is encountered and by main() when reading the .MAKEFLAGS envariable. 556 * Takes a line of arguments and breaks it into its 557 * component words and passes those words and the number of them to the 558 * MainParseArgs function. 559 * The line should have all its leading whitespace removed. 560 * 561 * Input: 562 * line Line to fracture 563 * 564 * Results: 565 * None 566 * 567 * Side Effects: 568 * Only those that come from the various arguments. 569 */ 570 void 571 Main_ParseArgLine(char *line) 572 { 573 char **argv; /* Manufactured argument vector */ 574 int argc; /* Number of arguments in argv */ 575 char *args; /* Space used by the args */ 576 char *buf, *p1; 577 char *argv0 = Var_Value(".MAKE", VAR_GLOBAL, &p1); 578 size_t len; 579 580 if (line == NULL) 581 return; 582 for (; *line == ' '; ++line) 583 continue; 584 if (!*line) 585 return; 586 587 buf = emalloc(len = strlen(line) + strlen(argv0) + 2); 588 (void)snprintf(buf, len, "%s %s", argv0, line); 589 if (p1) 590 free(p1); 591 592 argv = brk_string(buf, &argc, TRUE, &args); 593 free(buf); 594 MainParseArgs(argc, argv); 595 596 free(args); 597 free(argv); 598 } 599 600 Boolean 601 Main_SetObjdir(const char *path) 602 { 603 struct stat sb; 604 char *p = NULL; 605 char buf[MAXPATHLEN + 1]; 606 Boolean rc = FALSE; 607 608 /* expand variable substitutions */ 609 if (strchr(path, '$') != 0) { 610 snprintf(buf, MAXPATHLEN, "%s", path); 611 path = p = Var_Subst(NULL, buf, VAR_GLOBAL, 0); 612 } 613 614 if (path[0] != '/') { 615 snprintf(buf, MAXPATHLEN, "%s/%s", curdir, path); 616 path = buf; 617 } 618 619 /* look for the directory and try to chdir there */ 620 if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) { 621 if (chdir(path)) { 622 (void)fprintf(stderr, "make warning: %s: %s.\n", 623 path, strerror(errno)); 624 } else { 625 strncpy(objdir, path, MAXPATHLEN); 626 Var_Set(".OBJDIR", objdir, VAR_GLOBAL, 0); 627 setenv("PWD", objdir, 1); 628 Dir_InitDot(); 629 rc = TRUE; 630 } 631 } 632 633 if (p) 634 free(p); 635 return rc; 636 } 637 638 /*- 639 * ReadAllMakefiles -- 640 * wrapper around ReadMakefile() to read all. 641 * 642 * Results: 643 * TRUE if ok, FALSE on error 644 */ 645 static int 646 ReadAllMakefiles(ClientData p, ClientData q) 647 { 648 return (ReadMakefile(p, q) == 0); 649 } 650 651 /*- 652 * main -- 653 * The main function, for obvious reasons. Initializes variables 654 * and a few modules, then parses the arguments give it in the 655 * environment and on the command line. Reads the system makefile 656 * followed by either Makefile, makefile or the file given by the 657 * -f argument. Sets the .MAKEFLAGS PMake variable based on all the 658 * flags it has received by then uses either the Make or the Compat 659 * module to create the initial list of targets. 660 * 661 * Results: 662 * If -q was given, exits -1 if anything was out-of-date. Else it exits 663 * 0. 664 * 665 * Side Effects: 666 * The program exits when done. Targets are created. etc. etc. etc. 667 */ 668 int 669 main(int argc, char **argv) 670 { 671 Lst targs; /* target nodes to create -- passed to Make_Init */ 672 Boolean outOfDate = FALSE; /* FALSE if all targets up to date */ 673 struct stat sb, sa; 674 char *p1, *path, *pwd; 675 char mdpath[MAXPATHLEN]; 676 char *machine = getenv("MACHINE"); 677 const char *machine_arch = getenv("MACHINE_ARCH"); 678 char *syspath = getenv("MAKESYSPATH"); 679 Lst sysMkPath; /* Path of sys.mk */ 680 char *cp = NULL, *start; 681 /* avoid faults on read-only strings */ 682 static char defsyspath[] = _PATH_DEFSYSPATH; 683 char found_path[MAXPATHLEN + 1]; /* for searching for sys.mk */ 684 struct timeval rightnow; /* to initialize random seed */ 685 #ifdef MAKE_NATIVE 686 struct utsname utsname; 687 #endif 688 689 /* default to writing debug to stdout */ 690 debug_file = stdout; 691 692 /* 693 * Set the seed to produce a different random sequences 694 * on each program execution. 695 */ 696 gettimeofday(&rightnow, NULL); 697 srandom(rightnow.tv_sec + rightnow.tv_usec); 698 699 if ((progname = strrchr(argv[0], '/')) != NULL) 700 progname++; 701 else 702 progname = argv[0]; 703 #ifdef RLIMIT_NOFILE 704 /* 705 * get rid of resource limit on file descriptors 706 */ 707 { 708 struct rlimit rl; 709 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 && 710 rl.rlim_cur != rl.rlim_max) { 711 rl.rlim_cur = rl.rlim_max; 712 (void)setrlimit(RLIMIT_NOFILE, &rl); 713 } 714 } 715 #endif 716 /* 717 * Find where we are and take care of PWD for the automounter... 718 * All this code is so that we know where we are when we start up 719 * on a different machine with pmake. 720 */ 721 if (getcwd(curdir, MAXPATHLEN) == NULL) { 722 (void)fprintf(stderr, "%s: %s.\n", progname, strerror(errno)); 723 exit(2); 724 } 725 726 if (stat(curdir, &sa) == -1) { 727 (void)fprintf(stderr, "%s: %s: %s.\n", 728 progname, curdir, strerror(errno)); 729 exit(2); 730 } 731 732 /* 733 * Overriding getcwd() with $PWD totally breaks MAKEOBJDIRPREFIX 734 * since the value of curdir can very depending on how we got 735 * here. Ie sitting at a shell prompt (shell that provides $PWD) 736 * or via subdir.mk in which case its likely a shell which does 737 * not provide it. 738 * So, to stop it breaking this case only, we ignore PWD if 739 * MAKEOBJDIRPREFIX is set or MAKEOBJDIR contains a transform. 740 */ 741 if ((pwd = getenv("PWD")) != NULL && getenv("MAKEOBJDIRPREFIX") == NULL) { 742 const char *makeobjdir = getenv("MAKEOBJDIR"); 743 744 if (makeobjdir == NULL || !strchr(makeobjdir, '$')) { 745 if (stat(pwd, &sb) == 0 && sa.st_ino == sb.st_ino && 746 sa.st_dev == sb.st_dev) 747 (void)strncpy(curdir, pwd, MAXPATHLEN); 748 } 749 } 750 751 /* 752 * Get the name of this type of MACHINE from utsname 753 * so we can share an executable for similar machines. 754 * (i.e. m68k: amiga hp300, mac68k, sun3, ...) 755 * 756 * Note that both MACHINE and MACHINE_ARCH are decided at 757 * run-time. 758 */ 759 if (!machine) { 760 #ifdef MAKE_NATIVE 761 if (uname(&utsname) == -1) { 762 (void)fprintf(stderr, "%s: uname failed (%s).\n", progname, 763 strerror(errno)); 764 exit(2); 765 } 766 machine = utsname.machine; 767 #else 768 #ifdef MAKE_MACHINE 769 machine = MAKE_MACHINE; 770 #else 771 machine = "unknown"; 772 #endif 773 #endif 774 } 775 776 if (!machine_arch) { 777 #ifndef MACHINE_ARCH 778 #ifdef MAKE_MACHINE_ARCH 779 machine_arch = MAKE_MACHINE_ARCH; 780 #else 781 machine_arch = "unknown"; 782 #endif 783 #else 784 machine_arch = MACHINE_ARCH; 785 #endif 786 } 787 788 /* 789 * Just in case MAKEOBJDIR wants us to do something tricky. 790 */ 791 Var_Init(); /* Initialize the lists of variables for 792 * parsing arguments */ 793 Var_Set(".CURDIR", curdir, VAR_GLOBAL, 0); 794 Var_Set("MACHINE", machine, VAR_GLOBAL, 0); 795 Var_Set("MACHINE_ARCH", machine_arch, VAR_GLOBAL, 0); 796 #ifdef MAKE_VERSION 797 Var_Set("MAKE_VERSION", MAKE_VERSION, VAR_GLOBAL, 0); 798 #endif 799 Var_Set(".newline", "\n", VAR_GLOBAL, 0); /* handy for :@ loops */ 800 801 /* 802 * Find the .OBJDIR. If MAKEOBJDIRPREFIX, or failing that, 803 * MAKEOBJDIR is set in the environment, try only that value 804 * and fall back to .CURDIR if it does not exist. 805 * 806 * Otherwise, try _PATH_OBJDIR.MACHINE, _PATH_OBJDIR, and 807 * finally _PATH_OBJDIRPREFIX`pwd`, in that order. If none 808 * of these paths exist, just use .CURDIR. 809 */ 810 Dir_Init(curdir); 811 (void)Main_SetObjdir(curdir); 812 813 if ((path = getenv("MAKEOBJDIRPREFIX")) != NULL) { 814 (void)snprintf(mdpath, MAXPATHLEN, "%s%s", path, curdir); 815 (void)Main_SetObjdir(mdpath); 816 } else if ((path = getenv("MAKEOBJDIR")) != NULL) { 817 (void)Main_SetObjdir(path); 818 } else { 819 (void)snprintf(mdpath, MAXPATHLEN, "%s.%s", _PATH_OBJDIR, machine); 820 if (!Main_SetObjdir(mdpath) && !Main_SetObjdir(_PATH_OBJDIR)) { 821 (void)snprintf(mdpath, MAXPATHLEN, "%s%s", 822 _PATH_OBJDIRPREFIX, curdir); 823 (void)Main_SetObjdir(mdpath); 824 } 825 } 826 827 create = Lst_Init(FALSE); 828 makefiles = Lst_Init(FALSE); 829 printVars = FALSE; 830 variables = Lst_Init(FALSE); 831 beSilent = FALSE; /* Print commands as executed */ 832 ignoreErrors = FALSE; /* Pay attention to non-zero returns */ 833 noExecute = FALSE; /* Execute all commands */ 834 noRecursiveExecute = FALSE; /* Execute all .MAKE targets */ 835 keepgoing = FALSE; /* Stop on error */ 836 allPrecious = FALSE; /* Remove targets when interrupted */ 837 queryFlag = FALSE; /* This is not just a check-run */ 838 noBuiltins = FALSE; /* Read the built-in rules */ 839 touchFlag = FALSE; /* Actually update targets */ 840 debug = 0; /* No debug verbosity, please. */ 841 jobsRunning = FALSE; 842 843 maxJobs = DEFMAXLOCAL; /* Set default local max concurrency */ 844 maxJobTokens = maxJobs; 845 compatMake = FALSE; /* No compat mode */ 846 847 848 /* 849 * Initialize the parsing, directory and variable modules to prepare 850 * for the reading of inclusion paths and variable settings on the 851 * command line 852 */ 853 854 /* 855 * Initialize various variables. 856 * MAKE also gets this name, for compatibility 857 * .MAKEFLAGS gets set to the empty string just in case. 858 * MFLAGS also gets initialized empty, for compatibility. 859 */ 860 Parse_Init(); 861 Var_Set("MAKE", argv[0], VAR_GLOBAL, 0); 862 Var_Set(".MAKE", argv[0], VAR_GLOBAL, 0); 863 Var_Set(MAKEFLAGS, "", VAR_GLOBAL, 0); 864 Var_Set(MAKEOVERRIDES, "", VAR_GLOBAL, 0); 865 Var_Set("MFLAGS", "", VAR_GLOBAL, 0); 866 Var_Set(".ALLTARGETS", "", VAR_GLOBAL, 0); 867 868 /* 869 * First snag any flags out of the MAKE environment variable. 870 * (Note this is *not* MAKEFLAGS since /bin/make uses that and it's 871 * in a different format). 872 */ 873 #ifdef POSIX 874 Main_ParseArgLine(getenv("MAKEFLAGS")); 875 #else 876 Main_ParseArgLine(getenv("MAKE")); 877 #endif 878 879 MainParseArgs(argc, argv); 880 881 /* 882 * Be compatible if user did not specify -j and did not explicitly 883 * turned compatibility on 884 */ 885 if (!compatMake && !forceJobs) { 886 compatMake = TRUE; 887 } 888 889 /* 890 * Initialize archive, target and suffix modules in preparation for 891 * parsing the makefile(s) 892 */ 893 Arch_Init(); 894 Targ_Init(); 895 Suff_Init(); 896 Trace_Init(tracefile); 897 898 DEFAULT = NILGNODE; 899 (void)time(&now); 900 901 Trace_Log(MAKESTART, NULL); 902 903 /* 904 * Set up the .TARGETS variable to contain the list of targets to be 905 * created. If none specified, make the variable empty -- the parser 906 * will fill the thing in with the default or .MAIN target. 907 */ 908 if (!Lst_IsEmpty(create)) { 909 LstNode ln; 910 911 for (ln = Lst_First(create); ln != NILLNODE; 912 ln = Lst_Succ(ln)) { 913 char *name = (char *)Lst_Datum(ln); 914 915 Var_Append(".TARGETS", name, VAR_GLOBAL); 916 } 917 } else 918 Var_Set(".TARGETS", "", VAR_GLOBAL, 0); 919 920 921 /* 922 * If no user-supplied system path was given (through the -m option) 923 * add the directories from the DEFSYSPATH (more than one may be given 924 * as dir1:...:dirn) to the system include path. 925 */ 926 if (syspath == NULL || *syspath == '\0') 927 syspath = defsyspath; 928 else 929 syspath = strdup(syspath); 930 931 for (start = syspath; *start != '\0'; start = cp) { 932 for (cp = start; *cp != '\0' && *cp != ':'; cp++) 933 continue; 934 if (*cp == ':') { 935 *cp++ = '\0'; 936 } 937 /* look for magic parent directory search string */ 938 if (strncmp(".../", start, 4) != 0) { 939 (void)Dir_AddDir(defIncPath, start); 940 } else { 941 if (Dir_FindHereOrAbove(curdir, start+4, 942 found_path, sizeof(found_path))) { 943 (void)Dir_AddDir(defIncPath, found_path); 944 } 945 } 946 } 947 if (syspath != defsyspath) 948 free(syspath); 949 950 /* 951 * Read in the built-in rules first, followed by the specified 952 * makefile, if it was (makefile != NULL), or the default 953 * makefile and Makefile, in that order, if it wasn't. 954 */ 955 if (!noBuiltins) { 956 LstNode ln; 957 958 sysMkPath = Lst_Init(FALSE); 959 Dir_Expand(_PATH_DEFSYSMK, 960 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath, 961 sysMkPath); 962 if (Lst_IsEmpty(sysMkPath)) 963 Fatal("%s: no system rules (%s).", progname, 964 _PATH_DEFSYSMK); 965 ln = Lst_Find(sysMkPath, NULL, ReadMakefile); 966 if (ln == NILLNODE) 967 Fatal("%s: cannot open %s.", progname, 968 (char *)Lst_Datum(ln)); 969 } 970 971 if (!Lst_IsEmpty(makefiles)) { 972 LstNode ln; 973 974 ln = Lst_Find(makefiles, NULL, ReadAllMakefiles); 975 if (ln != NILLNODE) 976 Fatal("%s: cannot open %s.", progname, 977 (char *)Lst_Datum(ln)); 978 } else if (ReadMakefile(UNCONST("makefile"), NULL) != 0) 979 (void)ReadMakefile(UNCONST("Makefile"), NULL); 980 981 (void)ReadMakefile(UNCONST(".depend"), NULL); 982 983 Var_Append("MFLAGS", Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1), VAR_GLOBAL); 984 if (p1) 985 free(p1); 986 987 if (!compatMake) 988 Job_ServerStart(maxJobTokens, jp_0, jp_1); 989 if (DEBUG(JOB)) 990 fprintf(debug_file, "job_pipe %d %d, maxjobs %d, tokens %d, compat %d\n", 991 jp_0, jp_1, maxJobs, maxJobTokens, compatMake); 992 993 Main_ExportMAKEFLAGS(TRUE); /* initial export */ 994 995 Check_Cwd_av(0, NULL, 0); /* initialize it */ 996 997 998 /* 999 * For compatibility, look at the directories in the VPATH variable 1000 * and add them to the search path, if the variable is defined. The 1001 * variable's value is in the same format as the PATH envariable, i.e. 1002 * <directory>:<directory>:<directory>... 1003 */ 1004 if (Var_Exists("VPATH", VAR_CMD)) { 1005 char *vpath, savec; 1006 /* 1007 * GCC stores string constants in read-only memory, but 1008 * Var_Subst will want to write this thing, so store it 1009 * in an array 1010 */ 1011 static char VPATH[] = "${VPATH}"; 1012 1013 vpath = Var_Subst(NULL, VPATH, VAR_CMD, FALSE); 1014 path = vpath; 1015 do { 1016 /* skip to end of directory */ 1017 for (cp = path; *cp != ':' && *cp != '\0'; cp++) 1018 continue; 1019 /* Save terminator character so know when to stop */ 1020 savec = *cp; 1021 *cp = '\0'; 1022 /* Add directory to search path */ 1023 (void)Dir_AddDir(dirSearchPath, path); 1024 *cp = savec; 1025 path = cp + 1; 1026 } while (savec == ':'); 1027 free(vpath); 1028 } 1029 1030 /* 1031 * Now that all search paths have been read for suffixes et al, it's 1032 * time to add the default search path to their lists... 1033 */ 1034 Suff_DoPaths(); 1035 1036 /* 1037 * Propagate attributes through :: dependency lists. 1038 */ 1039 Targ_Propagate(); 1040 1041 /* print the initial graph, if the user requested it */ 1042 if (DEBUG(GRAPH1)) 1043 Targ_PrintGraph(1); 1044 1045 /* print the values of any variables requested by the user */ 1046 if (printVars) { 1047 LstNode ln; 1048 1049 for (ln = Lst_First(variables); ln != NILLNODE; 1050 ln = Lst_Succ(ln)) { 1051 char *var = (char *)Lst_Datum(ln); 1052 char *value; 1053 1054 if (strchr(var, '$')) { 1055 value = p1 = Var_Subst(NULL, var, VAR_GLOBAL, 0); 1056 } else { 1057 value = Var_Value(var, VAR_GLOBAL, &p1); 1058 } 1059 printf("%s\n", value ? value : ""); 1060 if (p1) 1061 free(p1); 1062 } 1063 } 1064 1065 /* 1066 * Have now read the entire graph and need to make a list of targets 1067 * to create. If none was given on the command line, we consult the 1068 * parsing module to find the main target(s) to create. 1069 */ 1070 if (Lst_IsEmpty(create)) 1071 targs = Parse_MainName(); 1072 else 1073 targs = Targ_FindList(create, TARG_CREATE); 1074 1075 if (!compatMake && !printVars) { 1076 /* 1077 * Initialize job module before traversing the graph, now that 1078 * any .BEGIN and .END targets have been read. This is done 1079 * only if the -q flag wasn't given (to prevent the .BEGIN from 1080 * being executed should it exist). 1081 */ 1082 if (!queryFlag) { 1083 Job_Init(); 1084 jobsRunning = TRUE; 1085 } 1086 1087 /* Traverse the graph, checking on all the targets */ 1088 outOfDate = Make_Run(targs); 1089 } else if (!printVars) { 1090 /* 1091 * Compat_Init will take care of creating all the targets as 1092 * well as initializing the module. 1093 */ 1094 Compat_Run(targs); 1095 } 1096 1097 #ifdef CLEANUP 1098 Lst_Destroy(targs, NOFREE); 1099 Lst_Destroy(variables, NOFREE); 1100 Lst_Destroy(makefiles, NOFREE); 1101 Lst_Destroy(create, (FreeProc *)free); 1102 #endif 1103 1104 /* print the graph now it's been processed if the user requested it */ 1105 if (DEBUG(GRAPH2)) 1106 Targ_PrintGraph(2); 1107 1108 Trace_Log(MAKEEND, 0); 1109 1110 Suff_End(); 1111 Targ_End(); 1112 Arch_End(); 1113 Var_End(); 1114 Parse_End(); 1115 Dir_End(); 1116 Job_End(); 1117 Trace_End(); 1118 1119 return outOfDate ? 1 : 0; 1120 } 1121 1122 /*- 1123 * ReadMakefile -- 1124 * Open and parse the given makefile. 1125 * 1126 * Results: 1127 * 0 if ok. -1 if couldn't open file. 1128 * 1129 * Side Effects: 1130 * lots 1131 */ 1132 static int 1133 ReadMakefile(ClientData p, ClientData q __unused) 1134 { 1135 char *fname = p; /* makefile to read */ 1136 FILE *stream; 1137 size_t len = MAXPATHLEN; 1138 char *name, *path = emalloc(len); 1139 int setMAKEFILE; 1140 1141 if (!strcmp(fname, "-")) { 1142 Parse_File("(stdin)", stdin); 1143 Var_Set("MAKEFILE", "", VAR_GLOBAL, 0); 1144 } else { 1145 setMAKEFILE = strcmp(fname, ".depend"); 1146 1147 /* if we've chdir'd, rebuild the path name */ 1148 if (strcmp(curdir, objdir) && *fname != '/') { 1149 size_t plen = strlen(curdir) + strlen(fname) + 2; 1150 if (len < plen) 1151 path = erealloc(path, len = 2 * plen); 1152 1153 (void)snprintf(path, len, "%s/%s", curdir, fname); 1154 if ((stream = fopen(path, "r")) != NULL) { 1155 fname = path; 1156 goto found; 1157 } 1158 1159 /* If curdir failed, try objdir (ala .depend) */ 1160 plen = strlen(objdir) + strlen(fname) + 2; 1161 if (len < plen) 1162 path = erealloc(path, len = 2 * plen); 1163 (void)snprintf(path, len, "%s/%s", objdir, fname); 1164 if ((stream = fopen(path, "r")) != NULL) { 1165 fname = path; 1166 goto found; 1167 } 1168 } else if ((stream = fopen(fname, "r")) != NULL) 1169 goto found; 1170 /* look in -I and system include directories. */ 1171 name = Dir_FindFile(fname, parseIncPath); 1172 if (!name) 1173 name = Dir_FindFile(fname, 1174 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath); 1175 if (!name || (stream = fopen(name, "r")) == NULL) { 1176 if (name) 1177 free(name); 1178 free(path); 1179 return(-1); 1180 } 1181 fname = name; 1182 /* 1183 * set the MAKEFILE variable desired by System V fans -- the 1184 * placement of the setting here means it gets set to the last 1185 * makefile specified, as it is set by SysV make. 1186 */ 1187 found: 1188 if (setMAKEFILE) 1189 Var_Set("MAKEFILE", fname, VAR_GLOBAL, 0); 1190 Parse_File(fname, stream); 1191 (void)fclose(stream); 1192 } 1193 free(path); 1194 return(0); 1195 } 1196 1197 1198 /* 1199 * If MAKEOBJDIRPREFIX is in use, make ends up not in .CURDIR 1200 * in situations that would not arrise with ./obj (links or not). 1201 * This tends to break things like: 1202 * 1203 * build: 1204 * ${MAKE} includes 1205 * 1206 * This function spots when ${.MAKE:T} or ${.MAKE} is a command (as 1207 * opposed to an argument) in a command line and if so returns 1208 * ${.CURDIR} so caller can chdir() so that the assumptions made by 1209 * the Makefile hold true. 1210 * 1211 * If ${.MAKE} does not contain any '/', then ${.MAKE:T} is skipped. 1212 * 1213 * The chdir() only happens in the child process, and does nothing if 1214 * MAKEOBJDIRPREFIX and MAKEOBJDIR are not in the environment so it 1215 * should not break anything. Also if NOCHECKMAKECHDIR is set we 1216 * do nothing - to ensure historic semantics can be retained. 1217 */ 1218 static int Check_Cwd_Off = 0; 1219 1220 static char * 1221 Check_Cwd_av(int ac, char **av, int copy) 1222 { 1223 static char *make[4]; 1224 static char *cur_dir = NULL; 1225 char **mp; 1226 char *cp; 1227 int is_cmd, next_cmd; 1228 int i; 1229 int n; 1230 1231 if (Check_Cwd_Off) 1232 return NULL; 1233 1234 if (make[0] == NULL) { 1235 if (Var_Exists("NOCHECKMAKECHDIR", VAR_GLOBAL)) { 1236 Check_Cwd_Off = 1; 1237 return NULL; 1238 } 1239 1240 make[1] = Var_Value(".MAKE", VAR_GLOBAL, &cp); 1241 if ((make[0] = strrchr(make[1], '/')) == NULL) { 1242 make[0] = make[1]; 1243 make[1] = NULL; 1244 } else 1245 ++make[0]; 1246 make[2] = NULL; 1247 cur_dir = Var_Value(".CURDIR", VAR_GLOBAL, &cp); 1248 } 1249 if (ac == 0 || av == NULL) 1250 return NULL; /* initialization only */ 1251 1252 if (getenv("MAKEOBJDIR") == NULL && 1253 getenv("MAKEOBJDIRPREFIX") == NULL) 1254 return NULL; 1255 1256 1257 next_cmd = 1; 1258 for (i = 0; i < ac; ++i) { 1259 is_cmd = next_cmd; 1260 1261 n = strlen(av[i]); 1262 cp = &(av[i])[n - 1]; 1263 if (strspn(av[i], "|&;") == (size_t)n) { 1264 next_cmd = 1; 1265 continue; 1266 } else if (*cp == ';' || *cp == '&' || *cp == '|' || *cp == ')') { 1267 next_cmd = 1; 1268 if (copy) { 1269 do { 1270 *cp-- = '\0'; 1271 } while (*cp == ';' || *cp == '&' || *cp == '|' || 1272 *cp == ')' || *cp == '}') ; 1273 } else { 1274 /* 1275 * XXX this should not happen. 1276 */ 1277 fprintf(stderr, "WARNING: raw arg ends in shell meta '%s'\n", 1278 av[i]); 1279 } 1280 } else 1281 next_cmd = 0; 1282 1283 cp = av[i]; 1284 if (*cp == ';' || *cp == '&' || *cp == '|') 1285 is_cmd = 1; 1286 1287 #ifdef check_cwd_debug 1288 fprintf(stderr, "av[%d] == %s '%s'", 1289 i, (is_cmd) ? "cmd" : "arg", av[i]); 1290 #endif 1291 if (is_cmd != 0) { 1292 if (*cp == '(' || *cp == '{' || 1293 *cp == ';' || *cp == '&' || *cp == '|') { 1294 do { 1295 ++cp; 1296 } while (*cp == '(' || *cp == '{' || 1297 *cp == ';' || *cp == '&' || *cp == '|'); 1298 if (*cp == '\0') { 1299 next_cmd = 1; 1300 continue; 1301 } 1302 } 1303 if (strcmp(cp, "cd") == 0 || strcmp(cp, "chdir") == 0) { 1304 #ifdef check_cwd_debug 1305 fprintf(stderr, " == cd, done.\n"); 1306 #endif 1307 return NULL; 1308 } 1309 for (mp = make; *mp != NULL; ++mp) { 1310 n = strlen(*mp); 1311 if (strcmp(cp, *mp) == 0) { 1312 #ifdef check_cwd_debug 1313 fprintf(stderr, " %s == '%s', chdir(%s)\n", 1314 cp, *mp, cur_dir); 1315 #endif 1316 return cur_dir; 1317 } 1318 } 1319 } 1320 #ifdef check_cwd_debug 1321 fprintf(stderr, "\n"); 1322 #endif 1323 } 1324 return NULL; 1325 } 1326 1327 char * 1328 Check_Cwd_Cmd(const char *cmd) 1329 { 1330 char *cp, *bp; 1331 char **av; 1332 int ac; 1333 1334 if (Check_Cwd_Off) 1335 return NULL; 1336 1337 if (cmd) { 1338 av = brk_string(cmd, &ac, TRUE, &bp); 1339 #ifdef check_cwd_debug 1340 fprintf(stderr, "splitting: '%s' -> %d words\n", 1341 cmd, ac); 1342 #endif 1343 } else { 1344 ac = 0; 1345 av = NULL; 1346 bp = NULL; 1347 } 1348 cp = Check_Cwd_av(ac, av, 1); 1349 if (bp) 1350 free(bp); 1351 if (av) 1352 free(av); 1353 return cp; 1354 } 1355 1356 void 1357 Check_Cwd(const char **argv) 1358 { 1359 char *cp; 1360 int ac; 1361 1362 if (Check_Cwd_Off) 1363 return; 1364 1365 for (ac = 0; argv[ac] != NULL; ++ac) 1366 /* NOTHING */; 1367 if (ac == 3 && *argv[1] == '-') { 1368 cp = Check_Cwd_Cmd(argv[2]); 1369 } else { 1370 cp = Check_Cwd_av(ac, UNCONST(argv), 0); 1371 } 1372 if (cp) { 1373 chdir(cp); 1374 } 1375 } 1376 1377 /*- 1378 * Cmd_Exec -- 1379 * Execute the command in cmd, and return the output of that command 1380 * in a string. 1381 * 1382 * Results: 1383 * A string containing the output of the command, or the empty string 1384 * If errnum is not NULL, it contains the reason for the command failure 1385 * 1386 * Side Effects: 1387 * The string must be freed by the caller. 1388 */ 1389 char * 1390 Cmd_Exec(const char *cmd, const char **errnum) 1391 { 1392 const char *args[4]; /* Args for invoking the shell */ 1393 int fds[2]; /* Pipe streams */ 1394 int cpid; /* Child PID */ 1395 int pid; /* PID from wait() */ 1396 char *res; /* result */ 1397 int status; /* command exit status */ 1398 Buffer buf; /* buffer to store the result */ 1399 char *cp; 1400 int cc; 1401 1402 1403 *errnum = NULL; 1404 1405 if (!shellName) 1406 Shell_Init(); 1407 /* 1408 * Set up arguments for shell 1409 */ 1410 args[0] = shellName; 1411 args[1] = "-c"; 1412 args[2] = cmd; 1413 args[3] = NULL; 1414 1415 /* 1416 * Open a pipe for fetching its output 1417 */ 1418 if (pipe(fds) == -1) { 1419 *errnum = "Couldn't create pipe for \"%s\""; 1420 goto bad; 1421 } 1422 1423 /* 1424 * Fork 1425 */ 1426 switch (cpid = vfork()) { 1427 case 0: 1428 /* 1429 * Close input side of pipe 1430 */ 1431 (void)close(fds[0]); 1432 1433 /* 1434 * Duplicate the output stream to the shell's output, then 1435 * shut the extra thing down. Note we don't fetch the error 1436 * stream...why not? Why? 1437 */ 1438 (void)dup2(fds[1], 1); 1439 (void)close(fds[1]); 1440 1441 (void)execv(shellPath, UNCONST(args)); 1442 _exit(1); 1443 /*NOTREACHED*/ 1444 1445 case -1: 1446 *errnum = "Couldn't exec \"%s\""; 1447 goto bad; 1448 1449 default: 1450 /* 1451 * No need for the writing half 1452 */ 1453 (void)close(fds[1]); 1454 1455 buf = Buf_Init(MAKE_BSIZE); 1456 1457 do { 1458 char result[BUFSIZ]; 1459 cc = read(fds[0], result, sizeof(result)); 1460 if (cc > 0) 1461 Buf_AddBytes(buf, cc, (Byte *)result); 1462 } 1463 while (cc > 0 || (cc == -1 && errno == EINTR)); 1464 1465 /* 1466 * Close the input side of the pipe. 1467 */ 1468 (void)close(fds[0]); 1469 1470 /* 1471 * Wait for the process to exit. 1472 */ 1473 while(((pid = wait(&status)) != cpid) && (pid >= 0)) 1474 continue; 1475 1476 res = (char *)Buf_GetAll(buf, &cc); 1477 Buf_Destroy(buf, FALSE); 1478 1479 if (cc == 0) 1480 *errnum = "Couldn't read shell's output for \"%s\""; 1481 1482 if (status) 1483 *errnum = "\"%s\" returned non-zero status"; 1484 1485 /* 1486 * Null-terminate the result, convert newlines to spaces and 1487 * install it in the variable. 1488 */ 1489 res[cc] = '\0'; 1490 cp = &res[cc]; 1491 1492 if (cc > 0 && *--cp == '\n') { 1493 /* 1494 * A final newline is just stripped 1495 */ 1496 *cp-- = '\0'; 1497 } 1498 while (cp >= res) { 1499 if (*cp == '\n') { 1500 *cp = ' '; 1501 } 1502 cp--; 1503 } 1504 break; 1505 } 1506 return res; 1507 bad: 1508 res = emalloc(1); 1509 *res = '\0'; 1510 return res; 1511 } 1512 1513 /*- 1514 * Error -- 1515 * Print an error message given its format. 1516 * 1517 * Results: 1518 * None. 1519 * 1520 * Side Effects: 1521 * The message is printed. 1522 */ 1523 /* VARARGS */ 1524 void 1525 Error(const char *fmt, ...) 1526 { 1527 va_list ap; 1528 1529 va_start(ap, fmt); 1530 fprintf(stderr, "%s: ", progname); 1531 (void)vfprintf(stderr, fmt, ap); 1532 va_end(ap); 1533 (void)fprintf(stderr, "\n"); 1534 (void)fflush(stderr); 1535 } 1536 1537 /*- 1538 * Fatal -- 1539 * Produce a Fatal error message. If jobs are running, waits for them 1540 * to finish. 1541 * 1542 * Results: 1543 * None 1544 * 1545 * Side Effects: 1546 * The program exits 1547 */ 1548 /* VARARGS */ 1549 void 1550 Fatal(const char *fmt, ...) 1551 { 1552 va_list ap; 1553 1554 va_start(ap, fmt); 1555 if (jobsRunning) 1556 Job_Wait(); 1557 1558 (void)vfprintf(stderr, fmt, ap); 1559 va_end(ap); 1560 (void)fprintf(stderr, "\n"); 1561 (void)fflush(stderr); 1562 1563 PrintOnError(NULL); 1564 1565 if (DEBUG(GRAPH2) || DEBUG(GRAPH3)) 1566 Targ_PrintGraph(2); 1567 Trace_Log(MAKEERROR, 0); 1568 exit(2); /* Not 1 so -q can distinguish error */ 1569 } 1570 1571 /* 1572 * Punt -- 1573 * Major exception once jobs are being created. Kills all jobs, prints 1574 * a message and exits. 1575 * 1576 * Results: 1577 * None 1578 * 1579 * Side Effects: 1580 * All children are killed indiscriminately and the program Lib_Exits 1581 */ 1582 /* VARARGS */ 1583 void 1584 Punt(const char *fmt, ...) 1585 { 1586 va_list ap; 1587 1588 va_start(ap, fmt); 1589 (void)fprintf(stderr, "%s: ", progname); 1590 (void)vfprintf(stderr, fmt, ap); 1591 va_end(ap); 1592 (void)fprintf(stderr, "\n"); 1593 (void)fflush(stderr); 1594 1595 PrintOnError(NULL); 1596 1597 DieHorribly(); 1598 } 1599 1600 /*- 1601 * DieHorribly -- 1602 * Exit without giving a message. 1603 * 1604 * Results: 1605 * None 1606 * 1607 * Side Effects: 1608 * A big one... 1609 */ 1610 void 1611 DieHorribly(void) 1612 { 1613 if (jobsRunning) 1614 Job_AbortAll(); 1615 if (DEBUG(GRAPH2)) 1616 Targ_PrintGraph(2); 1617 Trace_Log(MAKEERROR, 0); 1618 exit(2); /* Not 1, so -q can distinguish error */ 1619 } 1620 1621 /* 1622 * Finish -- 1623 * Called when aborting due to errors in child shell to signal 1624 * abnormal exit. 1625 * 1626 * Results: 1627 * None 1628 * 1629 * Side Effects: 1630 * The program exits 1631 */ 1632 void 1633 Finish(int errors) 1634 /* number of errors encountered in Make_Make */ 1635 { 1636 Fatal("%d error%s", errors, errors == 1 ? "" : "s"); 1637 } 1638 1639 #ifndef HAVE_EMALLOC 1640 /* 1641 * emalloc -- 1642 * malloc, but die on error. 1643 */ 1644 void * 1645 emalloc(size_t len) 1646 { 1647 void *p; 1648 1649 if ((p = malloc(len)) == NULL) 1650 enomem(); 1651 return(p); 1652 } 1653 1654 /* 1655 * estrdup -- 1656 * strdup, but die on error. 1657 */ 1658 char * 1659 estrdup(const char *str) 1660 { 1661 char *p; 1662 1663 if ((p = strdup(str)) == NULL) 1664 enomem(); 1665 return(p); 1666 } 1667 1668 /* 1669 * erealloc -- 1670 * realloc, but die on error. 1671 */ 1672 void * 1673 erealloc(void *ptr, size_t size) 1674 { 1675 if ((ptr = realloc(ptr, size)) == NULL) 1676 enomem(); 1677 return(ptr); 1678 } 1679 1680 /* 1681 * enomem -- 1682 * die when out of memory. 1683 */ 1684 void 1685 enomem(void) 1686 { 1687 (void)fprintf(stderr, "%s: %s.\n", progname, strerror(errno)); 1688 exit(2); 1689 } 1690 #endif 1691 1692 /* 1693 * enunlink -- 1694 * Remove a file carefully, avoiding directories. 1695 */ 1696 int 1697 eunlink(const char *file) 1698 { 1699 struct stat st; 1700 1701 if (lstat(file, &st) == -1) 1702 return -1; 1703 1704 if (S_ISDIR(st.st_mode)) { 1705 errno = EISDIR; 1706 return -1; 1707 } 1708 return unlink(file); 1709 } 1710 1711 /* 1712 * execError -- 1713 * Print why exec failed, avoiding stdio. 1714 */ 1715 void 1716 execError(const char *af, const char *av) 1717 { 1718 #ifdef USE_IOVEC 1719 int i = 0; 1720 struct iovec iov[8]; 1721 #define IOADD(s) \ 1722 (void)(iov[i].iov_base = UNCONST(s), \ 1723 iov[i].iov_len = strlen(iov[i].iov_base), \ 1724 i++) 1725 #else 1726 #define IOADD(void)write(2, s, strlen(s)) 1727 #endif 1728 1729 IOADD(progname); 1730 IOADD(": "); 1731 IOADD(af); 1732 IOADD("("); 1733 IOADD(av); 1734 IOADD(") failed ("); 1735 IOADD(strerror(errno)); 1736 IOADD(")\n"); 1737 1738 #ifdef USE_IOVEC 1739 (void)writev(2, iov, 8); 1740 #endif 1741 } 1742 1743 /* 1744 * usage -- 1745 * exit with usage message 1746 */ 1747 static void 1748 usage(void) 1749 { 1750 (void)fprintf(stderr, 1751 "usage: %s [-BeikNnqrstWX] [-D variable] [-d flags] [-f makefile]\n\ 1752 [-I directory] [-J private] [-j max_jobs] [-m directory] [-T file]\n\ 1753 [-V variable] [variable=value] [target ...]\n", progname); 1754 exit(2); 1755 } 1756 1757 1758 int 1759 PrintAddr(ClientData a, ClientData b) 1760 { 1761 printf("%lx ", (unsigned long) a); 1762 return b ? 0 : 0; 1763 } 1764 1765 1766 1767 void 1768 PrintOnError(const char *s) 1769 { 1770 char tmp[64]; 1771 char *cp; 1772 1773 if (s) 1774 printf("%s", s); 1775 1776 printf("\n%s: stopped in %s\n", progname, curdir); 1777 strncpy(tmp, "${MAKE_PRINT_VAR_ON_ERROR:@v@$v='${$v}'\n@}", 1778 sizeof(tmp) - 1); 1779 cp = Var_Subst(NULL, tmp, VAR_GLOBAL, 0); 1780 if (cp) { 1781 if (*cp) 1782 printf("%s", cp); 1783 free(cp); 1784 } 1785 } 1786 1787 void 1788 Main_ExportMAKEFLAGS(Boolean first) 1789 { 1790 static int once = 1; 1791 char tmp[64]; 1792 char *s; 1793 1794 if (once != first) 1795 return; 1796 once = 0; 1797 1798 strncpy(tmp, "${.MAKEFLAGS} ${.MAKEOVERRIDES:O:u:@v@$v=${$v:Q}@}", 1799 sizeof(tmp)); 1800 s = Var_Subst(NULL, tmp, VAR_CMD, 0); 1801 if (s && *s) { 1802 #ifdef POSIX 1803 setenv("MAKEFLAGS", s, 1); 1804 #else 1805 setenv("MAKE", s, 1); 1806 #endif 1807 } 1808 } 1809