1 /* $NetBSD: main.c,v 1.133 2006/10/15 08:38:21 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 1.133 2006/10/15 08:38:21 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 1.133 2006/10/15 08:38:21 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; 194 195 for (modules = argvalue; *modules; ++modules) { 196 switch (*modules) { 197 case 'A': 198 debug = ~0; 199 break; 200 case 'a': 201 debug |= DEBUG_ARCH; 202 break; 203 case 'c': 204 debug |= DEBUG_COND; 205 break; 206 case 'd': 207 debug |= DEBUG_DIR; 208 break; 209 case 'e': 210 debug |= DEBUG_ERROR; 211 break; 212 case 'f': 213 debug |= DEBUG_FOR; 214 break; 215 case 'g': 216 if (modules[1] == '1') { 217 debug |= DEBUG_GRAPH1; 218 ++modules; 219 } 220 else if (modules[1] == '2') { 221 debug |= DEBUG_GRAPH2; 222 ++modules; 223 } 224 else if (modules[1] == '3') { 225 debug |= DEBUG_GRAPH3; 226 ++modules; 227 } 228 break; 229 case 'j': 230 debug |= DEBUG_JOB; 231 break; 232 case 'm': 233 debug |= DEBUG_MAKE; 234 break; 235 case 'n': 236 debug |= DEBUG_SCRIPT; 237 break; 238 case 'p': 239 debug |= DEBUG_PARSE; 240 break; 241 case 's': 242 debug |= DEBUG_SUFF; 243 break; 244 case 't': 245 debug |= DEBUG_TARG; 246 break; 247 case 'v': 248 debug |= DEBUG_VAR; 249 break; 250 case 'x': 251 debug |= DEBUG_SHELL; 252 break; 253 case 'F': 254 if (debug_file != stdout && debug_file != stderr) 255 fclose(debug_file); 256 if (*++modules == '+') 257 debug_file = fopen(++modules, "a"); 258 else { 259 if (!strcmp(modules, "stdout")) 260 debug_file = stdout; 261 else if (!strcmp(modules, "stderr")) 262 debug_file = stderr; 263 else 264 debug_file = fopen(modules, "w"); 265 } 266 if (!debug_file) { 267 fprintf(stderr, "Cannot open debug file %s", 268 modules); 269 usage(); 270 } 271 /* Have this non-buffered */ 272 if (debug_file != stdout && debug_file != stderr) 273 setbuf(debug_file, NULL); 274 return; 275 default: 276 (void)fprintf(stderr, 277 "%s: illegal argument to d option -- %c\n", 278 progname, *modules); 279 usage(); 280 } 281 } 282 } 283 284 /*- 285 * MainParseArgs -- 286 * Parse a given argument vector. Called from main() and from 287 * Main_ParseArgLine() when the .MAKEFLAGS target is used. 288 * 289 * XXX: Deal with command line overriding .MAKEFLAGS in makefile 290 * 291 * Results: 292 * None 293 * 294 * Side Effects: 295 * Various global and local flags will be set depending on the flags 296 * given 297 */ 298 static void 299 MainParseArgs(int argc, char **argv) 300 { 301 char *p; 302 int c = '?'; 303 int arginc; 304 char *argvalue; 305 const char *getopt_def; 306 char *optscan; 307 Boolean inOption, dashDash = FALSE; 308 char found_path[MAXPATHLEN + 1]; /* for searching for sys.mk */ 309 310 #define OPTFLAGS "BD:I:J:NST:V:WXd:ef:ij:km:nqrst" 311 /* Can't actually use getopt(3) because rescanning is not portable */ 312 313 getopt_def = OPTFLAGS; 314 rearg: 315 inOption = FALSE; 316 optscan = NULL; 317 while(argc > 1) { 318 char *getopt_spec; 319 if(!inOption) 320 optscan = argv[1]; 321 c = *optscan++; 322 arginc = 0; 323 if(inOption) { 324 if(c == '\0') { 325 ++argv; 326 --argc; 327 inOption = FALSE; 328 continue; 329 } 330 } else { 331 if (c != '-' || dashDash) 332 break; 333 inOption = TRUE; 334 c = *optscan++; 335 } 336 /* '-' found at some earlier point */ 337 getopt_spec = strchr(getopt_def, c); 338 if(c != '\0' && getopt_spec != NULL && getopt_spec[1] == ':') { 339 /* -<something> found, and <something> should have an arg */ 340 inOption = FALSE; 341 arginc = 1; 342 argvalue = optscan; 343 if(*argvalue == '\0') { 344 if (argc < 3) 345 goto noarg; 346 argvalue = argv[2]; 347 arginc = 2; 348 } 349 } else { 350 argvalue = NULL; 351 } 352 switch(c) { 353 case '\0': 354 arginc = 1; 355 inOption = FALSE; 356 break; 357 case 'B': 358 compatMake = TRUE; 359 Var_Append(MAKEFLAGS, "-B", VAR_GLOBAL); 360 break; 361 case 'D': 362 if (argvalue == NULL) goto noarg; 363 Var_Set(argvalue, "1", VAR_GLOBAL, 0); 364 Var_Append(MAKEFLAGS, "-D", VAR_GLOBAL); 365 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 366 break; 367 case 'I': 368 if (argvalue == NULL) goto noarg; 369 Parse_AddIncludeDir(argvalue); 370 Var_Append(MAKEFLAGS, "-I", VAR_GLOBAL); 371 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 372 break; 373 case 'J': 374 if (argvalue == NULL) goto noarg; 375 if (sscanf(argvalue, "%d,%d", &jp_0, &jp_1) != 2) { 376 (void)fprintf(stderr, 377 "%s: internal error -- J option malformed (%s)\n", 378 progname, argvalue); 379 usage(); 380 } 381 if ((fcntl(jp_0, F_GETFD, 0) < 0) || 382 (fcntl(jp_1, F_GETFD, 0) < 0)) { 383 #if 0 384 (void)fprintf(stderr, 385 "%s: ###### warning -- J descriptors were closed!\n", 386 progname); 387 exit(2); 388 #endif 389 jp_0 = -1; 390 jp_1 = -1; 391 compatMake = TRUE; 392 } else { 393 Var_Append(MAKEFLAGS, "-J", VAR_GLOBAL); 394 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 395 jobServer = TRUE; 396 } 397 break; 398 case 'N': 399 noExecute = TRUE; 400 noRecursiveExecute = TRUE; 401 Var_Append(MAKEFLAGS, "-N", VAR_GLOBAL); 402 break; 403 case 'S': 404 keepgoing = FALSE; 405 Var_Append(MAKEFLAGS, "-S", VAR_GLOBAL); 406 break; 407 case 'T': 408 if (argvalue == NULL) goto noarg; 409 tracefile = estrdup(argvalue); 410 Var_Append(MAKEFLAGS, "-T", VAR_GLOBAL); 411 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 412 break; 413 case 'V': 414 if (argvalue == NULL) goto noarg; 415 printVars = TRUE; 416 (void)Lst_AtEnd(variables, (ClientData)argvalue); 417 Var_Append(MAKEFLAGS, "-V", VAR_GLOBAL); 418 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 419 break; 420 case 'W': 421 parseWarnFatal = TRUE; 422 break; 423 case 'X': 424 varNoExportEnv = TRUE; 425 Var_Append(MAKEFLAGS, "-X", VAR_GLOBAL); 426 break; 427 case 'd': 428 if (argvalue == NULL) goto noarg; 429 /* If '-d-opts' don't pass to children */ 430 if (argvalue[0] == '-') 431 argvalue++; 432 else { 433 Var_Append(MAKEFLAGS, "-d", VAR_GLOBAL); 434 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 435 } 436 parse_debug_options(argvalue); 437 break; 438 case 'e': 439 checkEnvFirst = TRUE; 440 Var_Append(MAKEFLAGS, "-e", VAR_GLOBAL); 441 break; 442 case 'f': 443 if (argvalue == NULL) goto noarg; 444 (void)Lst_AtEnd(makefiles, (ClientData)argvalue); 445 break; 446 case 'i': 447 ignoreErrors = TRUE; 448 Var_Append(MAKEFLAGS, "-i", VAR_GLOBAL); 449 break; 450 case 'j': 451 if (argvalue == NULL) goto noarg; 452 forceJobs = TRUE; 453 maxJobs = strtol(argvalue, &p, 0); 454 if (*p != '\0' || maxJobs < 1) { 455 (void)fprintf(stderr, "%s: illegal argument to -j -- must be positive integer!\n", 456 progname); 457 exit(1); 458 } 459 Var_Append(MAKEFLAGS, "-j", VAR_GLOBAL); 460 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 461 maxJobTokens = maxJobs; 462 break; 463 case 'k': 464 keepgoing = TRUE; 465 Var_Append(MAKEFLAGS, "-k", VAR_GLOBAL); 466 break; 467 case 'm': 468 if (argvalue == NULL) goto noarg; 469 /* look for magic parent directory search string */ 470 if (strncmp(".../", argvalue, 4) == 0) { 471 if (!Dir_FindHereOrAbove(curdir, argvalue+4, 472 found_path, sizeof(found_path))) 473 break; /* nothing doing */ 474 (void)Dir_AddDir(sysIncPath, found_path); 475 476 } else { 477 (void)Dir_AddDir(sysIncPath, argvalue); 478 } 479 Var_Append(MAKEFLAGS, "-m", VAR_GLOBAL); 480 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 481 break; 482 case 'n': 483 noExecute = TRUE; 484 Var_Append(MAKEFLAGS, "-n", VAR_GLOBAL); 485 break; 486 case 'q': 487 queryFlag = TRUE; 488 /* Kind of nonsensical, wot? */ 489 Var_Append(MAKEFLAGS, "-q", VAR_GLOBAL); 490 break; 491 case 'r': 492 noBuiltins = TRUE; 493 Var_Append(MAKEFLAGS, "-r", VAR_GLOBAL); 494 break; 495 case 's': 496 beSilent = TRUE; 497 Var_Append(MAKEFLAGS, "-s", VAR_GLOBAL); 498 break; 499 case 't': 500 touchFlag = TRUE; 501 Var_Append(MAKEFLAGS, "-t", VAR_GLOBAL); 502 break; 503 case '-': 504 dashDash = TRUE; 505 break; 506 default: 507 case '?': 508 usage(); 509 } 510 argv += arginc; 511 argc -= arginc; 512 } 513 514 oldVars = TRUE; 515 516 /* 517 * See if the rest of the arguments are variable assignments and 518 * perform them if so. Else take them to be targets and stuff them 519 * on the end of the "create" list. 520 */ 521 for (; argc > 1; ++argv, --argc) 522 if (Parse_IsVar(argv[1])) { 523 Parse_DoVar(argv[1], VAR_CMD); 524 } else { 525 if (!*argv[1]) 526 Punt("illegal (null) argument."); 527 if (*argv[1] == '-' && !dashDash) 528 goto rearg; 529 (void)Lst_AtEnd(create, (ClientData)estrdup(argv[1])); 530 } 531 532 return; 533 noarg: 534 (void)fprintf(stderr, "%s: option requires an argument -- %c\n", 535 progname, c); 536 usage(); 537 } 538 539 /*- 540 * Main_ParseArgLine -- 541 * Used by the parse module when a .MFLAGS or .MAKEFLAGS target 542 * is encountered and by main() when reading the .MAKEFLAGS envariable. 543 * Takes a line of arguments and breaks it into its 544 * component words and passes those words and the number of them to the 545 * MainParseArgs function. 546 * The line should have all its leading whitespace removed. 547 * 548 * Input: 549 * line Line to fracture 550 * 551 * Results: 552 * None 553 * 554 * Side Effects: 555 * Only those that come from the various arguments. 556 */ 557 void 558 Main_ParseArgLine(char *line) 559 { 560 char **argv; /* Manufactured argument vector */ 561 int argc; /* Number of arguments in argv */ 562 char *args; /* Space used by the args */ 563 char *buf, *p1; 564 char *argv0 = Var_Value(".MAKE", VAR_GLOBAL, &p1); 565 size_t len; 566 567 if (line == NULL) 568 return; 569 for (; *line == ' '; ++line) 570 continue; 571 if (!*line) 572 return; 573 574 buf = emalloc(len = strlen(line) + strlen(argv0) + 2); 575 (void)snprintf(buf, len, "%s %s", argv0, line); 576 if (p1) 577 free(p1); 578 579 argv = brk_string(buf, &argc, TRUE, &args); 580 free(buf); 581 MainParseArgs(argc, argv); 582 583 free(args); 584 free(argv); 585 } 586 587 Boolean 588 Main_SetObjdir(const char *path) 589 { 590 struct stat sb; 591 char *p = NULL; 592 char buf[MAXPATHLEN + 1]; 593 Boolean rc = FALSE; 594 595 /* expand variable substitutions */ 596 if (strchr(path, '$') != 0) { 597 snprintf(buf, MAXPATHLEN, "%s", path); 598 path = p = Var_Subst(NULL, buf, VAR_GLOBAL, 0); 599 } 600 601 if (path[0] != '/') { 602 snprintf(buf, MAXPATHLEN, "%s/%s", curdir, path); 603 path = buf; 604 } 605 606 /* look for the directory and try to chdir there */ 607 if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) { 608 if (chdir(path)) { 609 (void)fprintf(stderr, "make warning: %s: %s.\n", 610 path, strerror(errno)); 611 } else { 612 strncpy(objdir, path, MAXPATHLEN); 613 Var_Set(".OBJDIR", objdir, VAR_GLOBAL, 0); 614 setenv("PWD", objdir, 1); 615 Dir_InitDot(); 616 rc = TRUE; 617 } 618 } 619 620 if (p) 621 free(p); 622 return rc; 623 } 624 625 /*- 626 * ReadAllMakefiles -- 627 * wrapper around ReadMakefile() to read all. 628 * 629 * Results: 630 * TRUE if ok, FALSE on error 631 */ 632 static int 633 ReadAllMakefiles(ClientData p, ClientData q) 634 { 635 return (ReadMakefile(p, q) == 0); 636 } 637 638 /*- 639 * main -- 640 * The main function, for obvious reasons. Initializes variables 641 * and a few modules, then parses the arguments give it in the 642 * environment and on the command line. Reads the system makefile 643 * followed by either Makefile, makefile or the file given by the 644 * -f argument. Sets the .MAKEFLAGS PMake variable based on all the 645 * flags it has received by then uses either the Make or the Compat 646 * module to create the initial list of targets. 647 * 648 * Results: 649 * If -q was given, exits -1 if anything was out-of-date. Else it exits 650 * 0. 651 * 652 * Side Effects: 653 * The program exits when done. Targets are created. etc. etc. etc. 654 */ 655 int 656 main(int argc, char **argv) 657 { 658 Lst targs; /* target nodes to create -- passed to Make_Init */ 659 Boolean outOfDate = TRUE; /* FALSE if all targets up to date */ 660 struct stat sb, sa; 661 char *p1, *path, *pwd; 662 char mdpath[MAXPATHLEN]; 663 char *machine = getenv("MACHINE"); 664 const char *machine_arch = getenv("MACHINE_ARCH"); 665 char *syspath = getenv("MAKESYSPATH"); 666 Lst sysMkPath; /* Path of sys.mk */ 667 char *cp = NULL, *start; 668 /* avoid faults on read-only strings */ 669 static char defsyspath[] = _PATH_DEFSYSPATH; 670 char found_path[MAXPATHLEN + 1]; /* for searching for sys.mk */ 671 struct timeval rightnow; /* to initialize random seed */ 672 #ifdef MAKE_NATIVE 673 struct utsname utsname; 674 #endif 675 676 /* default to writing debug to stdout */ 677 debug_file = stdout; 678 679 /* 680 * Set the seed to produce a different random sequences 681 * on each program execution. 682 */ 683 gettimeofday(&rightnow, NULL); 684 srandom(rightnow.tv_sec + rightnow.tv_usec); 685 686 if ((progname = strrchr(argv[0], '/')) != NULL) 687 progname++; 688 else 689 progname = argv[0]; 690 #ifdef RLIMIT_NOFILE 691 /* 692 * get rid of resource limit on file descriptors 693 */ 694 { 695 struct rlimit rl; 696 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 && 697 rl.rlim_cur != rl.rlim_max) { 698 rl.rlim_cur = rl.rlim_max; 699 (void)setrlimit(RLIMIT_NOFILE, &rl); 700 } 701 } 702 #endif 703 /* 704 * Find where we are and take care of PWD for the automounter... 705 * All this code is so that we know where we are when we start up 706 * on a different machine with pmake. 707 */ 708 if (getcwd(curdir, MAXPATHLEN) == NULL) { 709 (void)fprintf(stderr, "%s: %s.\n", progname, strerror(errno)); 710 exit(2); 711 } 712 713 if (stat(curdir, &sa) == -1) { 714 (void)fprintf(stderr, "%s: %s: %s.\n", 715 progname, curdir, strerror(errno)); 716 exit(2); 717 } 718 719 /* 720 * Overriding getcwd() with $PWD totally breaks MAKEOBJDIRPREFIX 721 * since the value of curdir can very depending on how we got 722 * here. Ie sitting at a shell prompt (shell that provides $PWD) 723 * or via subdir.mk in which case its likely a shell which does 724 * not provide it. 725 * So, to stop it breaking this case only, we ignore PWD if 726 * MAKEOBJDIRPREFIX is set or MAKEOBJDIR contains a transform. 727 */ 728 if ((pwd = getenv("PWD")) != NULL && getenv("MAKEOBJDIRPREFIX") == NULL) { 729 const char *makeobjdir = getenv("MAKEOBJDIR"); 730 731 if (makeobjdir == NULL || !strchr(makeobjdir, '$')) { 732 if (stat(pwd, &sb) == 0 && sa.st_ino == sb.st_ino && 733 sa.st_dev == sb.st_dev) 734 (void)strncpy(curdir, pwd, MAXPATHLEN); 735 } 736 } 737 738 /* 739 * Get the name of this type of MACHINE from utsname 740 * so we can share an executable for similar machines. 741 * (i.e. m68k: amiga hp300, mac68k, sun3, ...) 742 * 743 * Note that both MACHINE and MACHINE_ARCH are decided at 744 * run-time. 745 */ 746 if (!machine) { 747 #ifdef MAKE_NATIVE 748 if (uname(&utsname) == -1) { 749 (void)fprintf(stderr, "%s: uname failed (%s).\n", progname, 750 strerror(errno)); 751 exit(2); 752 } 753 machine = utsname.machine; 754 #else 755 #ifdef MAKE_MACHINE 756 machine = MAKE_MACHINE; 757 #else 758 machine = "unknown"; 759 #endif 760 #endif 761 } 762 763 if (!machine_arch) { 764 #ifndef MACHINE_ARCH 765 #ifdef MAKE_MACHINE_ARCH 766 machine_arch = MAKE_MACHINE_ARCH; 767 #else 768 machine_arch = "unknown"; 769 #endif 770 #else 771 machine_arch = MACHINE_ARCH; 772 #endif 773 } 774 775 /* 776 * Just in case MAKEOBJDIR wants us to do something tricky. 777 */ 778 Var_Init(); /* Initialize the lists of variables for 779 * parsing arguments */ 780 Var_Set(".CURDIR", curdir, VAR_GLOBAL, 0); 781 Var_Set("MACHINE", machine, VAR_GLOBAL, 0); 782 Var_Set("MACHINE_ARCH", machine_arch, VAR_GLOBAL, 0); 783 #ifdef MAKE_VERSION 784 Var_Set("MAKE_VERSION", MAKE_VERSION, VAR_GLOBAL, 0); 785 #endif 786 Var_Set(".newline", "\n", VAR_GLOBAL, 0); /* handy for :@ loops */ 787 788 /* 789 * Find the .OBJDIR. If MAKEOBJDIRPREFIX, or failing that, 790 * MAKEOBJDIR is set in the environment, try only that value 791 * and fall back to .CURDIR if it does not exist. 792 * 793 * Otherwise, try _PATH_OBJDIR.MACHINE, _PATH_OBJDIR, and 794 * finally _PATH_OBJDIRPREFIX`pwd`, in that order. If none 795 * of these paths exist, just use .CURDIR. 796 */ 797 Dir_Init(curdir); 798 (void)Main_SetObjdir(curdir); 799 800 if ((path = getenv("MAKEOBJDIRPREFIX")) != NULL) { 801 (void)snprintf(mdpath, MAXPATHLEN, "%s%s", path, curdir); 802 (void)Main_SetObjdir(mdpath); 803 } else if ((path = getenv("MAKEOBJDIR")) != NULL) { 804 (void)Main_SetObjdir(path); 805 } else { 806 (void)snprintf(mdpath, MAXPATHLEN, "%s.%s", _PATH_OBJDIR, machine); 807 if (!Main_SetObjdir(mdpath) && !Main_SetObjdir(_PATH_OBJDIR)) { 808 (void)snprintf(mdpath, MAXPATHLEN, "%s%s", 809 _PATH_OBJDIRPREFIX, curdir); 810 (void)Main_SetObjdir(mdpath); 811 } 812 } 813 814 create = Lst_Init(FALSE); 815 makefiles = Lst_Init(FALSE); 816 printVars = FALSE; 817 variables = Lst_Init(FALSE); 818 beSilent = FALSE; /* Print commands as executed */ 819 ignoreErrors = FALSE; /* Pay attention to non-zero returns */ 820 noExecute = FALSE; /* Execute all commands */ 821 noRecursiveExecute = FALSE; /* Execute all .MAKE targets */ 822 keepgoing = FALSE; /* Stop on error */ 823 allPrecious = FALSE; /* Remove targets when interrupted */ 824 queryFlag = FALSE; /* This is not just a check-run */ 825 noBuiltins = FALSE; /* Read the built-in rules */ 826 touchFlag = FALSE; /* Actually update targets */ 827 debug = 0; /* No debug verbosity, please. */ 828 jobsRunning = FALSE; 829 830 maxJobs = DEFMAXLOCAL; /* Set default local max concurrency */ 831 maxJobTokens = maxJobs; 832 compatMake = FALSE; /* No compat mode */ 833 834 835 /* 836 * Initialize the parsing, directory and variable modules to prepare 837 * for the reading of inclusion paths and variable settings on the 838 * command line 839 */ 840 841 /* 842 * Initialize various variables. 843 * MAKE also gets this name, for compatibility 844 * .MAKEFLAGS gets set to the empty string just in case. 845 * MFLAGS also gets initialized empty, for compatibility. 846 */ 847 Parse_Init(); 848 Var_Set("MAKE", argv[0], VAR_GLOBAL, 0); 849 Var_Set(".MAKE", argv[0], VAR_GLOBAL, 0); 850 Var_Set(MAKEFLAGS, "", VAR_GLOBAL, 0); 851 Var_Set(MAKEOVERRIDES, "", VAR_GLOBAL, 0); 852 Var_Set("MFLAGS", "", VAR_GLOBAL, 0); 853 Var_Set(".ALLTARGETS", "", VAR_GLOBAL, 0); 854 855 /* 856 * First snag any flags out of the MAKE environment variable. 857 * (Note this is *not* MAKEFLAGS since /bin/make uses that and it's 858 * in a different format). 859 */ 860 #ifdef POSIX 861 Main_ParseArgLine(getenv("MAKEFLAGS")); 862 #else 863 Main_ParseArgLine(getenv("MAKE")); 864 #endif 865 866 MainParseArgs(argc, argv); 867 868 /* 869 * Be compatible if user did not specify -j and did not explicitly 870 * turned compatibility on 871 */ 872 if (!compatMake && !forceJobs) { 873 compatMake = TRUE; 874 } 875 876 /* 877 * Initialize archive, target and suffix modules in preparation for 878 * parsing the makefile(s) 879 */ 880 Arch_Init(); 881 Targ_Init(); 882 Suff_Init(); 883 Trace_Init(tracefile); 884 885 DEFAULT = NILGNODE; 886 (void)time(&now); 887 888 Trace_Log(MAKESTART, NULL); 889 890 /* 891 * Set up the .TARGETS variable to contain the list of targets to be 892 * created. If none specified, make the variable empty -- the parser 893 * will fill the thing in with the default or .MAIN target. 894 */ 895 if (!Lst_IsEmpty(create)) { 896 LstNode ln; 897 898 for (ln = Lst_First(create); ln != NILLNODE; 899 ln = Lst_Succ(ln)) { 900 char *name = (char *)Lst_Datum(ln); 901 902 Var_Append(".TARGETS", name, VAR_GLOBAL); 903 } 904 } else 905 Var_Set(".TARGETS", "", VAR_GLOBAL, 0); 906 907 908 /* 909 * If no user-supplied system path was given (through the -m option) 910 * add the directories from the DEFSYSPATH (more than one may be given 911 * as dir1:...:dirn) to the system include path. 912 */ 913 if (syspath == NULL || *syspath == '\0') 914 syspath = defsyspath; 915 else 916 syspath = strdup(syspath); 917 918 for (start = syspath; *start != '\0'; start = cp) { 919 for (cp = start; *cp != '\0' && *cp != ':'; cp++) 920 continue; 921 if (*cp == ':') { 922 *cp++ = '\0'; 923 } 924 /* look for magic parent directory search string */ 925 if (strncmp(".../", start, 4) != 0) { 926 (void)Dir_AddDir(defIncPath, start); 927 } else { 928 if (Dir_FindHereOrAbove(curdir, start+4, 929 found_path, sizeof(found_path))) { 930 (void)Dir_AddDir(defIncPath, found_path); 931 } 932 } 933 } 934 if (syspath != defsyspath) 935 free(syspath); 936 937 /* 938 * Read in the built-in rules first, followed by the specified 939 * makefile, if it was (makefile != NULL), or the default 940 * makefile and Makefile, in that order, if it wasn't. 941 */ 942 if (!noBuiltins) { 943 LstNode ln; 944 945 sysMkPath = Lst_Init(FALSE); 946 Dir_Expand(_PATH_DEFSYSMK, 947 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath, 948 sysMkPath); 949 if (Lst_IsEmpty(sysMkPath)) 950 Fatal("%s: no system rules (%s).", progname, 951 _PATH_DEFSYSMK); 952 ln = Lst_Find(sysMkPath, (ClientData)NULL, ReadMakefile); 953 if (ln == NILLNODE) 954 Fatal("%s: cannot open %s.", progname, 955 (char *)Lst_Datum(ln)); 956 } 957 958 if (!Lst_IsEmpty(makefiles)) { 959 LstNode ln; 960 961 ln = Lst_Find(makefiles, (ClientData)NULL, ReadAllMakefiles); 962 if (ln != NILLNODE) 963 Fatal("%s: cannot open %s.", progname, 964 (char *)Lst_Datum(ln)); 965 } else if (ReadMakefile(UNCONST("makefile"), NULL) != 0) 966 (void)ReadMakefile(UNCONST("Makefile"), NULL); 967 968 (void)ReadMakefile(UNCONST(".depend"), NULL); 969 970 Var_Append("MFLAGS", Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1), VAR_GLOBAL); 971 if (p1) 972 free(p1); 973 974 if (!compatMake) 975 Job_ServerStart(maxJobTokens, jp_0, jp_1); 976 if (DEBUG(JOB)) 977 fprintf(debug_file, "job_pipe %d %d, maxjobs %d, tokens %d, compat %d\n", 978 jp_0, jp_1, maxJobs, maxJobTokens, compatMake); 979 980 Main_ExportMAKEFLAGS(TRUE); /* initial export */ 981 982 Check_Cwd_av(0, NULL, 0); /* initialize it */ 983 984 985 /* 986 * For compatibility, look at the directories in the VPATH variable 987 * and add them to the search path, if the variable is defined. The 988 * variable's value is in the same format as the PATH envariable, i.e. 989 * <directory>:<directory>:<directory>... 990 */ 991 if (Var_Exists("VPATH", VAR_CMD)) { 992 char *vpath, savec; 993 /* 994 * GCC stores string constants in read-only memory, but 995 * Var_Subst will want to write this thing, so store it 996 * in an array 997 */ 998 static char VPATH[] = "${VPATH}"; 999 1000 vpath = Var_Subst(NULL, VPATH, VAR_CMD, FALSE); 1001 path = vpath; 1002 do { 1003 /* skip to end of directory */ 1004 for (cp = path; *cp != ':' && *cp != '\0'; cp++) 1005 continue; 1006 /* Save terminator character so know when to stop */ 1007 savec = *cp; 1008 *cp = '\0'; 1009 /* Add directory to search path */ 1010 (void)Dir_AddDir(dirSearchPath, path); 1011 *cp = savec; 1012 path = cp + 1; 1013 } while (savec == ':'); 1014 free(vpath); 1015 } 1016 1017 /* 1018 * Now that all search paths have been read for suffixes et al, it's 1019 * time to add the default search path to their lists... 1020 */ 1021 Suff_DoPaths(); 1022 1023 /* 1024 * Propagate attributes through :: dependency lists. 1025 * 1026 * Also propagate recursive dependencies for .WAIT. 1027 */ 1028 Targ_Propagate(); 1029 1030 /* print the initial graph, if the user requested it */ 1031 if (DEBUG(GRAPH1)) 1032 Targ_PrintGraph(1); 1033 1034 /* print the values of any variables requested by the user */ 1035 if (printVars) { 1036 LstNode ln; 1037 1038 for (ln = Lst_First(variables); ln != NILLNODE; 1039 ln = Lst_Succ(ln)) { 1040 char *var = (char *)Lst_Datum(ln); 1041 char *value; 1042 1043 if (strchr(var, '$')) { 1044 value = p1 = Var_Subst(NULL, var, VAR_GLOBAL, 0); 1045 } else { 1046 value = Var_Value(var, VAR_GLOBAL, &p1); 1047 } 1048 printf("%s\n", value ? value : ""); 1049 if (p1) 1050 free(p1); 1051 } 1052 } 1053 1054 /* 1055 * Have now read the entire graph and need to make a list of targets 1056 * to create. If none was given on the command line, we consult the 1057 * parsing module to find the main target(s) to create. 1058 */ 1059 if (Lst_IsEmpty(create)) 1060 targs = Parse_MainName(); 1061 else 1062 targs = Targ_FindList(create, TARG_CREATE); 1063 1064 if (!compatMake && !printVars) { 1065 /* 1066 * Initialize job module before traversing the graph, now that 1067 * any .BEGIN and .END targets have been read. This is done 1068 * only if the -q flag wasn't given (to prevent the .BEGIN from 1069 * being executed should it exist). 1070 */ 1071 if (!queryFlag) { 1072 Job_Init(); 1073 jobsRunning = TRUE; 1074 } 1075 1076 /* Traverse the graph, checking on all the targets */ 1077 outOfDate = Make_Run(targs); 1078 } else if (!printVars) { 1079 /* 1080 * Compat_Init will take care of creating all the targets as 1081 * well as initializing the module. 1082 */ 1083 Compat_Run(targs); 1084 } 1085 1086 #ifdef CLEANUP 1087 Lst_Destroy(targs, NOFREE); 1088 Lst_Destroy(variables, NOFREE); 1089 Lst_Destroy(makefiles, NOFREE); 1090 Lst_Destroy(create, (FreeProc *)free); 1091 #endif 1092 1093 /* print the graph now it's been processed if the user requested it */ 1094 if (DEBUG(GRAPH2)) 1095 Targ_PrintGraph(2); 1096 1097 Trace_Log(MAKEEND, 0); 1098 1099 Suff_End(); 1100 Targ_End(); 1101 Arch_End(); 1102 Var_End(); 1103 Parse_End(); 1104 Dir_End(); 1105 Job_End(); 1106 Trace_End(); 1107 1108 if (queryFlag && outOfDate) 1109 return(1); 1110 else 1111 return(0); 1112 } 1113 1114 /*- 1115 * ReadMakefile -- 1116 * Open and parse the given makefile. 1117 * 1118 * Results: 1119 * 0 if ok. -1 if couldn't open file. 1120 * 1121 * Side Effects: 1122 * lots 1123 */ 1124 static int 1125 ReadMakefile(ClientData p, ClientData q __unused) 1126 { 1127 char *fname = p; /* makefile to read */ 1128 FILE *stream; 1129 size_t len = MAXPATHLEN; 1130 char *name, *path = emalloc(len); 1131 int setMAKEFILE; 1132 1133 if (!strcmp(fname, "-")) { 1134 Parse_File("(stdin)", stdin); 1135 Var_Set("MAKEFILE", "", VAR_GLOBAL, 0); 1136 } else { 1137 setMAKEFILE = strcmp(fname, ".depend"); 1138 1139 /* if we've chdir'd, rebuild the path name */ 1140 if (strcmp(curdir, objdir) && *fname != '/') { 1141 size_t plen = strlen(curdir) + strlen(fname) + 2; 1142 if (len < plen) 1143 path = erealloc(path, len = 2 * plen); 1144 1145 (void)snprintf(path, len, "%s/%s", curdir, fname); 1146 if ((stream = fopen(path, "r")) != NULL) { 1147 fname = path; 1148 goto found; 1149 } 1150 1151 /* If curdir failed, try objdir (ala .depend) */ 1152 plen = strlen(objdir) + strlen(fname) + 2; 1153 if (len < plen) 1154 path = erealloc(path, len = 2 * plen); 1155 (void)snprintf(path, len, "%s/%s", objdir, fname); 1156 if ((stream = fopen(path, "r")) != NULL) { 1157 fname = path; 1158 goto found; 1159 } 1160 } else if ((stream = fopen(fname, "r")) != NULL) 1161 goto found; 1162 /* look in -I and system include directories. */ 1163 name = Dir_FindFile(fname, parseIncPath); 1164 if (!name) 1165 name = Dir_FindFile(fname, 1166 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath); 1167 if (!name || (stream = fopen(name, "r")) == NULL) { 1168 if (name) 1169 free(name); 1170 free(path); 1171 return(-1); 1172 } 1173 fname = name; 1174 /* 1175 * set the MAKEFILE variable desired by System V fans -- the 1176 * placement of the setting here means it gets set to the last 1177 * makefile specified, as it is set by SysV make. 1178 */ 1179 found: 1180 if (setMAKEFILE) 1181 Var_Set("MAKEFILE", fname, VAR_GLOBAL, 0); 1182 Parse_File(fname, stream); 1183 (void)fclose(stream); 1184 } 1185 free(path); 1186 return(0); 1187 } 1188 1189 1190 /* 1191 * If MAKEOBJDIRPREFIX is in use, make ends up not in .CURDIR 1192 * in situations that would not arrise with ./obj (links or not). 1193 * This tends to break things like: 1194 * 1195 * build: 1196 * ${MAKE} includes 1197 * 1198 * This function spots when ${.MAKE:T} or ${.MAKE} is a command (as 1199 * opposed to an argument) in a command line and if so returns 1200 * ${.CURDIR} so caller can chdir() so that the assumptions made by 1201 * the Makefile hold true. 1202 * 1203 * If ${.MAKE} does not contain any '/', then ${.MAKE:T} is skipped. 1204 * 1205 * The chdir() only happens in the child process, and does nothing if 1206 * MAKEOBJDIRPREFIX and MAKEOBJDIR are not in the environment so it 1207 * should not break anything. Also if NOCHECKMAKECHDIR is set we 1208 * do nothing - to ensure historic semantics can be retained. 1209 */ 1210 static int Check_Cwd_Off = 0; 1211 1212 static char * 1213 Check_Cwd_av(int ac, char **av, int copy) 1214 { 1215 static char *make[4]; 1216 static char *cur_dir = NULL; 1217 char **mp; 1218 char *cp; 1219 int is_cmd, next_cmd; 1220 int i; 1221 int n; 1222 1223 if (Check_Cwd_Off) 1224 return NULL; 1225 1226 if (make[0] == NULL) { 1227 if (Var_Exists("NOCHECKMAKECHDIR", VAR_GLOBAL)) { 1228 Check_Cwd_Off = 1; 1229 return NULL; 1230 } 1231 1232 make[1] = Var_Value(".MAKE", VAR_GLOBAL, &cp); 1233 if ((make[0] = strrchr(make[1], '/')) == NULL) { 1234 make[0] = make[1]; 1235 make[1] = NULL; 1236 } else 1237 ++make[0]; 1238 make[2] = NULL; 1239 cur_dir = Var_Value(".CURDIR", VAR_GLOBAL, &cp); 1240 } 1241 if (ac == 0 || av == NULL) 1242 return NULL; /* initialization only */ 1243 1244 if (getenv("MAKEOBJDIR") == NULL && 1245 getenv("MAKEOBJDIRPREFIX") == NULL) 1246 return NULL; 1247 1248 1249 next_cmd = 1; 1250 for (i = 0; i < ac; ++i) { 1251 is_cmd = next_cmd; 1252 1253 n = strlen(av[i]); 1254 cp = &(av[i])[n - 1]; 1255 if (strspn(av[i], "|&;") == (size_t)n) { 1256 next_cmd = 1; 1257 continue; 1258 } else if (*cp == ';' || *cp == '&' || *cp == '|' || *cp == ')') { 1259 next_cmd = 1; 1260 if (copy) { 1261 do { 1262 *cp-- = '\0'; 1263 } while (*cp == ';' || *cp == '&' || *cp == '|' || 1264 *cp == ')' || *cp == '}') ; 1265 } else { 1266 /* 1267 * XXX this should not happen. 1268 */ 1269 fprintf(stderr, "WARNING: raw arg ends in shell meta '%s'\n", 1270 av[i]); 1271 } 1272 } else 1273 next_cmd = 0; 1274 1275 cp = av[i]; 1276 if (*cp == ';' || *cp == '&' || *cp == '|') 1277 is_cmd = 1; 1278 1279 #ifdef check_cwd_debug 1280 fprintf(stderr, "av[%d] == %s '%s'", 1281 i, (is_cmd) ? "cmd" : "arg", av[i]); 1282 #endif 1283 if (is_cmd != 0) { 1284 if (*cp == '(' || *cp == '{' || 1285 *cp == ';' || *cp == '&' || *cp == '|') { 1286 do { 1287 ++cp; 1288 } while (*cp == '(' || *cp == '{' || 1289 *cp == ';' || *cp == '&' || *cp == '|'); 1290 if (*cp == '\0') { 1291 next_cmd = 1; 1292 continue; 1293 } 1294 } 1295 if (strcmp(cp, "cd") == 0 || strcmp(cp, "chdir") == 0) { 1296 #ifdef check_cwd_debug 1297 fprintf(stderr, " == cd, done.\n"); 1298 #endif 1299 return NULL; 1300 } 1301 for (mp = make; *mp != NULL; ++mp) { 1302 n = strlen(*mp); 1303 if (strcmp(cp, *mp) == 0) { 1304 #ifdef check_cwd_debug 1305 fprintf(stderr, " %s == '%s', chdir(%s)\n", 1306 cp, *mp, cur_dir); 1307 #endif 1308 return cur_dir; 1309 } 1310 } 1311 } 1312 #ifdef check_cwd_debug 1313 fprintf(stderr, "\n"); 1314 #endif 1315 } 1316 return NULL; 1317 } 1318 1319 char * 1320 Check_Cwd_Cmd(const char *cmd) 1321 { 1322 char *cp, *bp; 1323 char **av; 1324 int ac; 1325 1326 if (Check_Cwd_Off) 1327 return NULL; 1328 1329 if (cmd) { 1330 av = brk_string(cmd, &ac, TRUE, &bp); 1331 #ifdef check_cwd_debug 1332 fprintf(stderr, "splitting: '%s' -> %d words\n", 1333 cmd, ac); 1334 #endif 1335 } else { 1336 ac = 0; 1337 av = NULL; 1338 bp = NULL; 1339 } 1340 cp = Check_Cwd_av(ac, av, 1); 1341 if (bp) 1342 free(bp); 1343 if (av) 1344 free(av); 1345 return cp; 1346 } 1347 1348 void 1349 Check_Cwd(const char **argv) 1350 { 1351 char *cp; 1352 int ac; 1353 1354 if (Check_Cwd_Off) 1355 return; 1356 1357 for (ac = 0; argv[ac] != NULL; ++ac) 1358 /* NOTHING */; 1359 if (ac == 3 && *argv[1] == '-') { 1360 cp = Check_Cwd_Cmd(argv[2]); 1361 } else { 1362 cp = Check_Cwd_av(ac, UNCONST(argv), 0); 1363 } 1364 if (cp) { 1365 chdir(cp); 1366 } 1367 } 1368 1369 /*- 1370 * Cmd_Exec -- 1371 * Execute the command in cmd, and return the output of that command 1372 * in a string. 1373 * 1374 * Results: 1375 * A string containing the output of the command, or the empty string 1376 * If errnum is not NULL, it contains the reason for the command failure 1377 * 1378 * Side Effects: 1379 * The string must be freed by the caller. 1380 */ 1381 char * 1382 Cmd_Exec(const char *cmd, const char **errnum) 1383 { 1384 const char *args[4]; /* Args for invoking the shell */ 1385 int fds[2]; /* Pipe streams */ 1386 int cpid; /* Child PID */ 1387 int pid; /* PID from wait() */ 1388 char *res; /* result */ 1389 int status; /* command exit status */ 1390 Buffer buf; /* buffer to store the result */ 1391 char *cp; 1392 int cc; 1393 1394 1395 *errnum = NULL; 1396 1397 if (!shellName) 1398 Shell_Init(); 1399 /* 1400 * Set up arguments for shell 1401 */ 1402 args[0] = shellName; 1403 args[1] = "-c"; 1404 args[2] = cmd; 1405 args[3] = NULL; 1406 1407 /* 1408 * Open a pipe for fetching its output 1409 */ 1410 if (pipe(fds) == -1) { 1411 *errnum = "Couldn't create pipe for \"%s\""; 1412 goto bad; 1413 } 1414 1415 /* 1416 * Fork 1417 */ 1418 switch (cpid = vfork()) { 1419 case 0: 1420 /* 1421 * Close input side of pipe 1422 */ 1423 (void)close(fds[0]); 1424 1425 /* 1426 * Duplicate the output stream to the shell's output, then 1427 * shut the extra thing down. Note we don't fetch the error 1428 * stream...why not? Why? 1429 */ 1430 (void)dup2(fds[1], 1); 1431 (void)close(fds[1]); 1432 1433 (void)execv(shellPath, UNCONST(args)); 1434 _exit(1); 1435 /*NOTREACHED*/ 1436 1437 case -1: 1438 *errnum = "Couldn't exec \"%s\""; 1439 goto bad; 1440 1441 default: 1442 /* 1443 * No need for the writing half 1444 */ 1445 (void)close(fds[1]); 1446 1447 buf = Buf_Init(MAKE_BSIZE); 1448 1449 do { 1450 char result[BUFSIZ]; 1451 cc = read(fds[0], result, sizeof(result)); 1452 if (cc > 0) 1453 Buf_AddBytes(buf, cc, (Byte *)result); 1454 } 1455 while (cc > 0 || (cc == -1 && errno == EINTR)); 1456 1457 /* 1458 * Close the input side of the pipe. 1459 */ 1460 (void)close(fds[0]); 1461 1462 /* 1463 * Wait for the process to exit. 1464 */ 1465 while(((pid = wait(&status)) != cpid) && (pid >= 0)) 1466 continue; 1467 1468 res = (char *)Buf_GetAll(buf, &cc); 1469 Buf_Destroy(buf, FALSE); 1470 1471 if (cc == 0) 1472 *errnum = "Couldn't read shell's output for \"%s\""; 1473 1474 if (status) 1475 *errnum = "\"%s\" returned non-zero status"; 1476 1477 /* 1478 * Null-terminate the result, convert newlines to spaces and 1479 * install it in the variable. 1480 */ 1481 res[cc] = '\0'; 1482 cp = &res[cc]; 1483 1484 if (cc > 0 && *--cp == '\n') { 1485 /* 1486 * A final newline is just stripped 1487 */ 1488 *cp-- = '\0'; 1489 } 1490 while (cp >= res) { 1491 if (*cp == '\n') { 1492 *cp = ' '; 1493 } 1494 cp--; 1495 } 1496 break; 1497 } 1498 return res; 1499 bad: 1500 res = emalloc(1); 1501 *res = '\0'; 1502 return res; 1503 } 1504 1505 /*- 1506 * Error -- 1507 * Print an error message given its format. 1508 * 1509 * Results: 1510 * None. 1511 * 1512 * Side Effects: 1513 * The message is printed. 1514 */ 1515 /* VARARGS */ 1516 void 1517 Error(const char *fmt, ...) 1518 { 1519 va_list ap; 1520 1521 va_start(ap, fmt); 1522 fprintf(stderr, "%s: ", progname); 1523 (void)vfprintf(stderr, fmt, ap); 1524 va_end(ap); 1525 (void)fprintf(stderr, "\n"); 1526 (void)fflush(stderr); 1527 } 1528 1529 /*- 1530 * Fatal -- 1531 * Produce a Fatal error message. If jobs are running, waits for them 1532 * to finish. 1533 * 1534 * Results: 1535 * None 1536 * 1537 * Side Effects: 1538 * The program exits 1539 */ 1540 /* VARARGS */ 1541 void 1542 Fatal(const char *fmt, ...) 1543 { 1544 va_list ap; 1545 1546 va_start(ap, fmt); 1547 if (jobsRunning) 1548 Job_Wait(); 1549 1550 (void)vfprintf(stderr, fmt, ap); 1551 va_end(ap); 1552 (void)fprintf(stderr, "\n"); 1553 (void)fflush(stderr); 1554 1555 PrintOnError(NULL); 1556 1557 if (DEBUG(GRAPH2) || DEBUG(GRAPH3)) 1558 Targ_PrintGraph(2); 1559 Trace_Log(MAKEERROR, 0); 1560 exit(2); /* Not 1 so -q can distinguish error */ 1561 } 1562 1563 /* 1564 * Punt -- 1565 * Major exception once jobs are being created. Kills all jobs, prints 1566 * a message and exits. 1567 * 1568 * Results: 1569 * None 1570 * 1571 * Side Effects: 1572 * All children are killed indiscriminately and the program Lib_Exits 1573 */ 1574 /* VARARGS */ 1575 void 1576 Punt(const char *fmt, ...) 1577 { 1578 va_list ap; 1579 1580 va_start(ap, fmt); 1581 (void)fprintf(stderr, "%s: ", progname); 1582 (void)vfprintf(stderr, fmt, ap); 1583 va_end(ap); 1584 (void)fprintf(stderr, "\n"); 1585 (void)fflush(stderr); 1586 1587 PrintOnError(NULL); 1588 1589 DieHorribly(); 1590 } 1591 1592 /*- 1593 * DieHorribly -- 1594 * Exit without giving a message. 1595 * 1596 * Results: 1597 * None 1598 * 1599 * Side Effects: 1600 * A big one... 1601 */ 1602 void 1603 DieHorribly(void) 1604 { 1605 if (jobsRunning) 1606 Job_AbortAll(); 1607 if (DEBUG(GRAPH2)) 1608 Targ_PrintGraph(2); 1609 Trace_Log(MAKEERROR, 0); 1610 exit(2); /* Not 1, so -q can distinguish error */ 1611 } 1612 1613 /* 1614 * Finish -- 1615 * Called when aborting due to errors in child shell to signal 1616 * abnormal exit. 1617 * 1618 * Results: 1619 * None 1620 * 1621 * Side Effects: 1622 * The program exits 1623 */ 1624 void 1625 Finish(int errors) 1626 /* number of errors encountered in Make_Make */ 1627 { 1628 Fatal("%d error%s", errors, errors == 1 ? "" : "s"); 1629 } 1630 1631 #ifndef MAKE_NATIVE 1632 /* 1633 * emalloc -- 1634 * malloc, but die on error. 1635 */ 1636 void * 1637 emalloc(size_t len) 1638 { 1639 void *p; 1640 1641 if ((p = malloc(len)) == NULL) 1642 enomem(); 1643 return(p); 1644 } 1645 1646 /* 1647 * estrdup -- 1648 * strdup, but die on error. 1649 */ 1650 char * 1651 estrdup(const char *str) 1652 { 1653 char *p; 1654 1655 if ((p = strdup(str)) == NULL) 1656 enomem(); 1657 return(p); 1658 } 1659 1660 /* 1661 * erealloc -- 1662 * realloc, but die on error. 1663 */ 1664 void * 1665 erealloc(void *ptr, size_t size) 1666 { 1667 if ((ptr = realloc(ptr, size)) == NULL) 1668 enomem(); 1669 return(ptr); 1670 } 1671 1672 /* 1673 * enomem -- 1674 * die when out of memory. 1675 */ 1676 void 1677 enomem(void) 1678 { 1679 (void)fprintf(stderr, "%s: %s.\n", progname, strerror(errno)); 1680 exit(2); 1681 } 1682 #endif 1683 1684 /* 1685 * enunlink -- 1686 * Remove a file carefully, avoiding directories. 1687 */ 1688 int 1689 eunlink(const char *file) 1690 { 1691 struct stat st; 1692 1693 if (lstat(file, &st) == -1) 1694 return -1; 1695 1696 if (S_ISDIR(st.st_mode)) { 1697 errno = EISDIR; 1698 return -1; 1699 } 1700 return unlink(file); 1701 } 1702 1703 /* 1704 * execError -- 1705 * Print why exec failed, avoiding stdio. 1706 */ 1707 void 1708 execError(const char *af, const char *av) 1709 { 1710 #ifdef USE_IOVEC 1711 int i = 0; 1712 struct iovec iov[8]; 1713 #define IOADD(s) \ 1714 (void)(iov[i].iov_base = UNCONST(s), \ 1715 iov[i].iov_len = strlen(iov[i].iov_base), \ 1716 i++) 1717 #else 1718 #define IOADD(void)write(2, s, strlen(s)) 1719 #endif 1720 1721 IOADD(progname); 1722 IOADD(": "); 1723 IOADD(af); 1724 IOADD("("); 1725 IOADD(av); 1726 IOADD(") failed ("); 1727 IOADD(strerror(errno)); 1728 IOADD(")\n"); 1729 1730 #ifdef USE_IOVEC 1731 (void)writev(2, iov, 8); 1732 #endif 1733 } 1734 1735 /* 1736 * usage -- 1737 * exit with usage message 1738 */ 1739 static void 1740 usage(void) 1741 { 1742 (void)fprintf(stderr, 1743 "usage: %s [-BeikNnqrstWX] [-D variable] [-d flags] [-f makefile]\n\ 1744 [-I directory] [-J private] [-j max_jobs] [-m directory] [-T file]\n\ 1745 [-V variable] [variable=value] [target ...]\n", progname); 1746 exit(2); 1747 } 1748 1749 1750 int 1751 PrintAddr(ClientData a, ClientData b) 1752 { 1753 printf("%lx ", (unsigned long) a); 1754 return b ? 0 : 0; 1755 } 1756 1757 1758 1759 void 1760 PrintOnError(const char *s) 1761 { 1762 char tmp[64]; 1763 char *cp; 1764 1765 if (s) 1766 printf("%s", s); 1767 1768 printf("\n%s: stopped in %s\n", progname, curdir); 1769 strncpy(tmp, "${MAKE_PRINT_VAR_ON_ERROR:@v@$v='${$v}'\n@}", 1770 sizeof(tmp) - 1); 1771 cp = Var_Subst(NULL, tmp, VAR_GLOBAL, 0); 1772 if (cp) { 1773 if (*cp) 1774 printf("%s", cp); 1775 free(cp); 1776 } 1777 } 1778 1779 void 1780 Main_ExportMAKEFLAGS(Boolean first) 1781 { 1782 static int once = 1; 1783 char tmp[64]; 1784 char *s; 1785 1786 if (once != first) 1787 return; 1788 once = 0; 1789 1790 strncpy(tmp, "${.MAKEFLAGS} ${.MAKEOVERRIDES:O:u:@v@$v=${$v:Q}@}", 1791 sizeof(tmp)); 1792 s = Var_Subst(NULL, tmp, VAR_CMD, 0); 1793 if (s && *s) { 1794 #ifdef POSIX 1795 setenv("MAKEFLAGS", s, 1); 1796 #else 1797 setenv("MAKE", s, 1); 1798 #endif 1799 } 1800 } 1801