1 /* $NetBSD: main.c,v 1.121 2006/03/11 17:18:00 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 1.121 2006/03/11 17:18:00 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 1.121 2006/03/11 17:18:00 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 Boolean compatMake; /* -B argument */ 160 int debug; /* -d argument */ 161 Boolean noExecute; /* -n flag */ 162 Boolean noRecursiveExecute; /* -N flag */ 163 Boolean keepgoing; /* -k flag */ 164 Boolean queryFlag; /* -q flag */ 165 Boolean touchFlag; /* -t flag */ 166 Boolean usePipes; /* !-P 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 Boolean varNoExportEnv; /* -X flag */ 174 static Boolean jobsRunning; /* TRUE if the jobs might be running */ 175 static const char * tracefile; 176 static char * Check_Cwd_av(int, char **, int); 177 static void MainParseArgs(int, char **); 178 static int ReadMakefile(ClientData, ClientData); 179 static void usage(void); 180 181 static char curdir[MAXPATHLEN + 1]; /* startup directory */ 182 static char objdir[MAXPATHLEN + 1]; /* where we chdir'ed to */ 183 char *progname; /* the program name */ 184 185 Boolean forceJobs = FALSE; 186 187 extern Lst parseIncPath; 188 189 /*- 190 * MainParseArgs -- 191 * Parse a given argument vector. Called from main() and from 192 * Main_ParseArgLine() when the .MAKEFLAGS target is used. 193 * 194 * XXX: Deal with command line overriding .MAKEFLAGS in makefile 195 * 196 * Results: 197 * None 198 * 199 * Side Effects: 200 * Various global and local flags will be set depending on the flags 201 * given 202 */ 203 static void 204 MainParseArgs(int argc, char **argv) 205 { 206 char *p; 207 int c; 208 int arginc; 209 char *argvalue; 210 const char *getopt_def; 211 char *optscan; 212 Boolean inOption, dashDash = FALSE; 213 char found_path[MAXPATHLEN + 1]; /* for searching for sys.mk */ 214 215 #define OPTFLAGS "BD:I:J:NPST:V:WXd:ef:ij:km:nqrst" 216 #undef optarg 217 #define optarg argvalue 218 /* Can't actually use getopt(3) because rescanning is not portable */ 219 220 getopt_def = OPTFLAGS; 221 rearg: 222 inOption = FALSE; 223 optscan = NULL; 224 while(argc > 1) { 225 char *getopt_spec; 226 if(!inOption) 227 optscan = argv[1]; 228 c = *optscan++; 229 arginc = 0; 230 if(inOption) { 231 if(c == '\0') { 232 ++argv; 233 --argc; 234 inOption = FALSE; 235 continue; 236 } 237 } else { 238 if (c != '-' || dashDash) 239 break; 240 inOption = TRUE; 241 c = *optscan++; 242 } 243 /* '-' found at some earlier point */ 244 getopt_spec = strchr(getopt_def, c); 245 if(c != '\0' && getopt_spec != NULL && getopt_spec[1] == ':') { 246 /* -<something> found, and <something> should have an arg */ 247 inOption = FALSE; 248 arginc = 1; 249 argvalue = optscan; 250 if(*argvalue == '\0') { 251 if (argc < 3) { 252 (void)fprintf(stderr, 253 "%s: option requires " 254 "an argument -- %c\n", 255 progname, c); 256 usage(); 257 } 258 argvalue = argv[2]; 259 arginc = 2; 260 } 261 } else { 262 argvalue = NULL; 263 } 264 switch(c) { 265 case '\0': 266 arginc = 1; 267 inOption = FALSE; 268 break; 269 case 'B': 270 compatMake = TRUE; 271 Var_Append(MAKEFLAGS, "-B", VAR_GLOBAL); 272 break; 273 case 'D': 274 Var_Set(optarg, "1", VAR_GLOBAL, 0); 275 Var_Append(MAKEFLAGS, "-D", VAR_GLOBAL); 276 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); 277 break; 278 case 'I': 279 Parse_AddIncludeDir(optarg); 280 Var_Append(MAKEFLAGS, "-I", VAR_GLOBAL); 281 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); 282 break; 283 case 'J': 284 if (sscanf(optarg, "%d,%d", &job_pipe[0], &job_pipe[1]) != 2) { 285 /* backslash to avoid trigraph ??) */ 286 (void)fprintf(stderr, 287 "%s: internal error -- J option malformed (%s?\?)\n", 288 progname, optarg); 289 usage(); 290 } 291 if ((fcntl(job_pipe[0], F_GETFD, 0) < 0) || 292 (fcntl(job_pipe[1], F_GETFD, 0) < 0)) { 293 #if 0 294 (void)fprintf(stderr, 295 "%s: ###### warning -- J descriptors were closed!\n", 296 progname); 297 exit(2); 298 #endif 299 job_pipe[0] = -1; 300 job_pipe[1] = -1; 301 compatMake = TRUE; 302 } else { 303 Var_Append(MAKEFLAGS, "-J", VAR_GLOBAL); 304 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); 305 jobServer = TRUE; 306 } 307 break; 308 case 'N': 309 noExecute = TRUE; 310 noRecursiveExecute = TRUE; 311 Var_Append(MAKEFLAGS, "-N", VAR_GLOBAL); 312 break; 313 case 'P': 314 usePipes = FALSE; 315 Var_Append(MAKEFLAGS, "-P", VAR_GLOBAL); 316 break; 317 case 'S': 318 keepgoing = FALSE; 319 Var_Append(MAKEFLAGS, "-S", VAR_GLOBAL); 320 break; 321 case 'T': 322 tracefile = estrdup(optarg); 323 Var_Append(MAKEFLAGS, "-T", VAR_GLOBAL); 324 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); 325 break; 326 case 'V': 327 printVars = TRUE; 328 (void)Lst_AtEnd(variables, (ClientData)optarg); 329 Var_Append(MAKEFLAGS, "-V", VAR_GLOBAL); 330 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); 331 break; 332 case 'W': 333 parseWarnFatal = TRUE; 334 break; 335 case 'X': 336 varNoExportEnv = TRUE; 337 Var_Append(MAKEFLAGS, "-X", VAR_GLOBAL); 338 break; 339 case 'd': { 340 char *modules = optarg; 341 342 for (; *modules; ++modules) 343 switch (*modules) { 344 case 'A': 345 debug = ~0; 346 break; 347 case 'a': 348 debug |= DEBUG_ARCH; 349 break; 350 case 'c': 351 debug |= DEBUG_COND; 352 break; 353 case 'd': 354 debug |= DEBUG_DIR; 355 break; 356 case 'e': 357 debug |= DEBUG_ERROR; 358 break; 359 case 'f': 360 debug |= DEBUG_FOR; 361 break; 362 case 'g': 363 if (modules[1] == '1') { 364 debug |= DEBUG_GRAPH1; 365 ++modules; 366 } 367 else if (modules[1] == '2') { 368 debug |= DEBUG_GRAPH2; 369 ++modules; 370 } 371 else if (modules[1] == '3') { 372 debug |= DEBUG_GRAPH3; 373 ++modules; 374 } 375 break; 376 case 'j': 377 debug |= DEBUG_JOB; 378 break; 379 case 'm': 380 debug |= DEBUG_MAKE; 381 break; 382 case 'n': 383 debug |= DEBUG_SCRIPT; 384 break; 385 case 'p': 386 debug |= DEBUG_PARSE; 387 break; 388 case 's': 389 debug |= DEBUG_SUFF; 390 break; 391 case 't': 392 debug |= DEBUG_TARG; 393 break; 394 case 'v': 395 debug |= DEBUG_VAR; 396 break; 397 case 'x': 398 debug |= DEBUG_SHELL; 399 break; 400 default: 401 (void)fprintf(stderr, 402 "%s: illegal argument to d option -- %c\n", 403 progname, *modules); 404 usage(); 405 } 406 Var_Append(MAKEFLAGS, "-d", VAR_GLOBAL); 407 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); 408 break; 409 } 410 case 'e': 411 checkEnvFirst = TRUE; 412 Var_Append(MAKEFLAGS, "-e", VAR_GLOBAL); 413 break; 414 case 'f': 415 (void)Lst_AtEnd(makefiles, (ClientData)optarg); 416 break; 417 case 'i': 418 ignoreErrors = TRUE; 419 Var_Append(MAKEFLAGS, "-i", VAR_GLOBAL); 420 break; 421 case 'j': 422 forceJobs = TRUE; 423 maxJobs = strtol(optarg, &p, 0); 424 if (*p != '\0' || maxJobs < 1) { 425 (void)fprintf(stderr, "%s: illegal argument to -j -- must be positive integer!\n", 426 progname); 427 exit(1); 428 } 429 Var_Append(MAKEFLAGS, "-j", VAR_GLOBAL); 430 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); 431 break; 432 case 'k': 433 keepgoing = TRUE; 434 Var_Append(MAKEFLAGS, "-k", VAR_GLOBAL); 435 break; 436 case 'm': 437 /* look for magic parent directory search string */ 438 if (strncmp(".../", optarg, 4) == 0) { 439 if (!Dir_FindHereOrAbove(curdir, optarg+4, 440 found_path, sizeof(found_path))) 441 break; /* nothing doing */ 442 (void)Dir_AddDir(sysIncPath, found_path); 443 444 } else { 445 (void)Dir_AddDir(sysIncPath, optarg); 446 } 447 Var_Append(MAKEFLAGS, "-m", VAR_GLOBAL); 448 Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); 449 break; 450 case 'n': 451 noExecute = TRUE; 452 Var_Append(MAKEFLAGS, "-n", VAR_GLOBAL); 453 break; 454 case 'q': 455 queryFlag = TRUE; 456 /* Kind of nonsensical, wot? */ 457 Var_Append(MAKEFLAGS, "-q", VAR_GLOBAL); 458 break; 459 case 'r': 460 noBuiltins = TRUE; 461 Var_Append(MAKEFLAGS, "-r", VAR_GLOBAL); 462 break; 463 case 's': 464 beSilent = TRUE; 465 Var_Append(MAKEFLAGS, "-s", VAR_GLOBAL); 466 break; 467 case 't': 468 touchFlag = TRUE; 469 Var_Append(MAKEFLAGS, "-t", VAR_GLOBAL); 470 break; 471 case '-': 472 dashDash = TRUE; 473 break; 474 default: 475 case '?': 476 usage(); 477 } 478 argv += arginc; 479 argc -= arginc; 480 } 481 482 oldVars = TRUE; 483 484 /* 485 * See if the rest of the arguments are variable assignments and 486 * perform them if so. Else take them to be targets and stuff them 487 * on the end of the "create" list. 488 */ 489 for (; argc > 1; ++argv, --argc) 490 if (Parse_IsVar(argv[1])) { 491 Parse_DoVar(argv[1], VAR_CMD); 492 } else { 493 if (!*argv[1]) 494 Punt("illegal (null) argument."); 495 if (*argv[1] == '-' && !dashDash) 496 goto rearg; 497 (void)Lst_AtEnd(create, (ClientData)estrdup(argv[1])); 498 } 499 } 500 501 /*- 502 * Main_ParseArgLine -- 503 * Used by the parse module when a .MFLAGS or .MAKEFLAGS target 504 * is encountered and by main() when reading the .MAKEFLAGS envariable. 505 * Takes a line of arguments and breaks it into its 506 * component words and passes those words and the number of them to the 507 * MainParseArgs function. 508 * The line should have all its leading whitespace removed. 509 * 510 * Input: 511 * line Line to fracture 512 * 513 * Results: 514 * None 515 * 516 * Side Effects: 517 * Only those that come from the various arguments. 518 */ 519 void 520 Main_ParseArgLine(char *line) 521 { 522 char **argv; /* Manufactured argument vector */ 523 int argc; /* Number of arguments in argv */ 524 char *args; /* Space used by the args */ 525 char *buf, *p1; 526 char *argv0 = Var_Value(".MAKE", VAR_GLOBAL, &p1); 527 size_t len; 528 529 if (line == NULL) 530 return; 531 for (; *line == ' '; ++line) 532 continue; 533 if (!*line) 534 return; 535 536 buf = emalloc(len = strlen(line) + strlen(argv0) + 2); 537 (void)snprintf(buf, len, "%s %s", argv0, line); 538 if (p1) 539 free(p1); 540 541 argv = brk_string(buf, &argc, TRUE, &args); 542 free(buf); 543 MainParseArgs(argc, argv); 544 545 free(args); 546 free(argv); 547 } 548 549 Boolean 550 Main_SetObjdir(const char *path) 551 { 552 struct stat sb; 553 char *p = NULL; 554 char buf[MAXPATHLEN + 1]; 555 Boolean rc = FALSE; 556 557 /* expand variable substitutions */ 558 if (strchr(path, '$') != 0) { 559 snprintf(buf, MAXPATHLEN, "%s", path); 560 path = p = Var_Subst(NULL, buf, VAR_GLOBAL, 0); 561 } 562 563 if (path[0] != '/') { 564 snprintf(buf, MAXPATHLEN, "%s/%s", curdir, path); 565 path = buf; 566 } 567 568 /* look for the directory and try to chdir there */ 569 if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) { 570 if (chdir(path)) { 571 (void)fprintf(stderr, "make warning: %s: %s.\n", 572 path, strerror(errno)); 573 } else { 574 strncpy(objdir, path, MAXPATHLEN); 575 Var_Set(".OBJDIR", objdir, VAR_GLOBAL, 0); 576 setenv("PWD", objdir, 1); 577 Dir_InitDot(); 578 rc = TRUE; 579 } 580 } 581 582 if (p) 583 free(p); 584 return rc; 585 } 586 587 588 /*- 589 * main -- 590 * The main function, for obvious reasons. Initializes variables 591 * and a few modules, then parses the arguments give it in the 592 * environment and on the command line. Reads the system makefile 593 * followed by either Makefile, makefile or the file given by the 594 * -f argument. Sets the .MAKEFLAGS PMake variable based on all the 595 * flags it has received by then uses either the Make or the Compat 596 * module to create the initial list of targets. 597 * 598 * Results: 599 * If -q was given, exits -1 if anything was out-of-date. Else it exits 600 * 0. 601 * 602 * Side Effects: 603 * The program exits when done. Targets are created. etc. etc. etc. 604 */ 605 int 606 main(int argc, char **argv) 607 { 608 Lst targs; /* target nodes to create -- passed to Make_Init */ 609 Boolean outOfDate = TRUE; /* FALSE if all targets up to date */ 610 struct stat sb, sa; 611 char *p1, *path, *pwd; 612 char mdpath[MAXPATHLEN]; 613 char *machine = getenv("MACHINE"); 614 const char *machine_arch = getenv("MACHINE_ARCH"); 615 char *syspath = getenv("MAKESYSPATH"); 616 Lst sysMkPath; /* Path of sys.mk */ 617 char *cp = NULL, *start; 618 /* avoid faults on read-only strings */ 619 static char defsyspath[] = _PATH_DEFSYSPATH; 620 char found_path[MAXPATHLEN + 1]; /* for searching for sys.mk */ 621 struct timeval rightnow; /* to initialize random seed */ 622 #ifdef MAKE_NATIVE 623 struct utsname utsname; 624 #endif 625 626 /* 627 * Set the seed to produce a different random sequences 628 * on each program execution. 629 */ 630 gettimeofday(&rightnow, NULL); 631 srandom(rightnow.tv_sec + rightnow.tv_usec); 632 633 if ((progname = strrchr(argv[0], '/')) != NULL) 634 progname++; 635 else 636 progname = argv[0]; 637 #ifdef RLIMIT_NOFILE 638 /* 639 * get rid of resource limit on file descriptors 640 */ 641 { 642 struct rlimit rl; 643 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 && 644 rl.rlim_cur != rl.rlim_max) { 645 rl.rlim_cur = rl.rlim_max; 646 (void)setrlimit(RLIMIT_NOFILE, &rl); 647 } 648 } 649 #endif 650 /* 651 * Find where we are and take care of PWD for the automounter... 652 * All this code is so that we know where we are when we start up 653 * on a different machine with pmake. 654 */ 655 if (getcwd(curdir, MAXPATHLEN) == NULL) { 656 (void)fprintf(stderr, "%s: %s.\n", progname, strerror(errno)); 657 exit(2); 658 } 659 660 if (stat(curdir, &sa) == -1) { 661 (void)fprintf(stderr, "%s: %s: %s.\n", 662 progname, curdir, strerror(errno)); 663 exit(2); 664 } 665 666 /* 667 * Overriding getcwd() with $PWD totally breaks MAKEOBJDIRPREFIX 668 * since the value of curdir can very depending on how we got 669 * here. Ie sitting at a shell prompt (shell that provides $PWD) 670 * or via subdir.mk in which case its likely a shell which does 671 * not provide it. 672 * So, to stop it breaking this case only, we ignore PWD if 673 * MAKEOBJDIRPREFIX is set or MAKEOBJDIR contains a transform. 674 */ 675 if ((pwd = getenv("PWD")) != NULL && getenv("MAKEOBJDIRPREFIX") == NULL) { 676 const char *makeobjdir = getenv("MAKEOBJDIR"); 677 678 if (makeobjdir == NULL || !strchr(makeobjdir, '$')) { 679 if (stat(pwd, &sb) == 0 && sa.st_ino == sb.st_ino && 680 sa.st_dev == sb.st_dev) 681 (void)strncpy(curdir, pwd, MAXPATHLEN); 682 } 683 } 684 685 /* 686 * Get the name of this type of MACHINE from utsname 687 * so we can share an executable for similar machines. 688 * (i.e. m68k: amiga hp300, mac68k, sun3, ...) 689 * 690 * Note that both MACHINE and MACHINE_ARCH are decided at 691 * run-time. 692 */ 693 if (!machine) { 694 #ifdef MAKE_NATIVE 695 if (uname(&utsname) == -1) { 696 (void)fprintf(stderr, "%s: uname failed (%s).\n", progname, 697 strerror(errno)); 698 exit(2); 699 } 700 machine = utsname.machine; 701 #else 702 #ifdef MAKE_MACHINE 703 machine = MAKE_MACHINE; 704 #else 705 machine = "unknown"; 706 #endif 707 #endif 708 } 709 710 if (!machine_arch) { 711 #ifndef MACHINE_ARCH 712 #ifdef MAKE_MACHINE_ARCH 713 machine_arch = MAKE_MACHINE_ARCH; 714 #else 715 machine_arch = "unknown"; 716 #endif 717 #else 718 machine_arch = MACHINE_ARCH; 719 #endif 720 } 721 722 /* 723 * Just in case MAKEOBJDIR wants us to do something tricky. 724 */ 725 Var_Init(); /* Initialize the lists of variables for 726 * parsing arguments */ 727 Var_Set(".CURDIR", curdir, VAR_GLOBAL, 0); 728 Var_Set("MACHINE", machine, VAR_GLOBAL, 0); 729 Var_Set("MACHINE_ARCH", machine_arch, VAR_GLOBAL, 0); 730 #ifdef MAKE_VERSION 731 Var_Set("MAKE_VERSION", MAKE_VERSION, VAR_GLOBAL, 0); 732 #endif 733 Var_Set(".newline", "\n", VAR_GLOBAL, 0); /* handy for :@ loops */ 734 735 /* 736 * Find the .OBJDIR. If MAKEOBJDIRPREFIX, or failing that, 737 * MAKEOBJDIR is set in the environment, try only that value 738 * and fall back to .CURDIR if it does not exist. 739 * 740 * Otherwise, try _PATH_OBJDIR.MACHINE, _PATH_OBJDIR, and 741 * finally _PATH_OBJDIRPREFIX`pwd`, in that order. If none 742 * of these paths exist, just use .CURDIR. 743 */ 744 Dir_Init(curdir); 745 (void)Main_SetObjdir(curdir); 746 747 if ((path = getenv("MAKEOBJDIRPREFIX")) != NULL) { 748 (void)snprintf(mdpath, MAXPATHLEN, "%s%s", path, curdir); 749 (void)Main_SetObjdir(mdpath); 750 } else if ((path = getenv("MAKEOBJDIR")) != NULL) { 751 (void)Main_SetObjdir(path); 752 } else { 753 (void)snprintf(mdpath, MAXPATHLEN, "%s.%s", _PATH_OBJDIR, machine); 754 if (!Main_SetObjdir(mdpath) && !Main_SetObjdir(_PATH_OBJDIR)) { 755 (void)snprintf(mdpath, MAXPATHLEN, "%s%s", 756 _PATH_OBJDIRPREFIX, curdir); 757 (void)Main_SetObjdir(mdpath); 758 } 759 } 760 761 create = Lst_Init(FALSE); 762 makefiles = Lst_Init(FALSE); 763 printVars = FALSE; 764 variables = Lst_Init(FALSE); 765 beSilent = FALSE; /* Print commands as executed */ 766 ignoreErrors = FALSE; /* Pay attention to non-zero returns */ 767 noExecute = FALSE; /* Execute all commands */ 768 noRecursiveExecute = FALSE; /* Execute all .MAKE targets */ 769 keepgoing = FALSE; /* Stop on error */ 770 allPrecious = FALSE; /* Remove targets when interrupted */ 771 queryFlag = FALSE; /* This is not just a check-run */ 772 noBuiltins = FALSE; /* Read the built-in rules */ 773 touchFlag = FALSE; /* Actually update targets */ 774 usePipes = TRUE; /* Catch child output in pipes */ 775 debug = 0; /* No debug verbosity, please. */ 776 jobsRunning = FALSE; 777 778 maxJobs = DEFMAXLOCAL; /* Set default local max concurrency */ 779 compatMake = FALSE; /* No compat mode */ 780 781 782 /* 783 * Initialize the parsing, directory and variable modules to prepare 784 * for the reading of inclusion paths and variable settings on the 785 * command line 786 */ 787 788 /* 789 * Initialize various variables. 790 * MAKE also gets this name, for compatibility 791 * .MAKEFLAGS gets set to the empty string just in case. 792 * MFLAGS also gets initialized empty, for compatibility. 793 */ 794 Parse_Init(); 795 Var_Set("MAKE", argv[0], VAR_GLOBAL, 0); 796 Var_Set(".MAKE", argv[0], VAR_GLOBAL, 0); 797 Var_Set(MAKEFLAGS, "", VAR_GLOBAL, 0); 798 Var_Set(MAKEOVERRIDES, "", VAR_GLOBAL, 0); 799 Var_Set("MFLAGS", "", VAR_GLOBAL, 0); 800 Var_Set(".ALLTARGETS", "", VAR_GLOBAL, 0); 801 802 /* 803 * First snag any flags out of the MAKE environment variable. 804 * (Note this is *not* MAKEFLAGS since /bin/make uses that and it's 805 * in a different format). 806 */ 807 #ifdef POSIX 808 Main_ParseArgLine(getenv("MAKEFLAGS")); 809 #else 810 Main_ParseArgLine(getenv("MAKE")); 811 #endif 812 813 MainParseArgs(argc, argv); 814 815 /* 816 * Be compatible if user did not specify -j and did not explicitly 817 * turned compatibility on 818 */ 819 if (!compatMake && !forceJobs) { 820 compatMake = TRUE; 821 } 822 823 /* 824 * Initialize archive, target and suffix modules in preparation for 825 * parsing the makefile(s) 826 */ 827 Arch_Init(); 828 Targ_Init(); 829 Suff_Init(); 830 Trace_Init(tracefile); 831 832 DEFAULT = NILGNODE; 833 (void)time(&now); 834 835 Trace_Log(MAKESTART, NULL); 836 837 /* 838 * Set up the .TARGETS variable to contain the list of targets to be 839 * created. If none specified, make the variable empty -- the parser 840 * will fill the thing in with the default or .MAIN target. 841 */ 842 if (!Lst_IsEmpty(create)) { 843 LstNode ln; 844 845 for (ln = Lst_First(create); ln != NILLNODE; 846 ln = Lst_Succ(ln)) { 847 char *name = (char *)Lst_Datum(ln); 848 849 Var_Append(".TARGETS", name, VAR_GLOBAL); 850 } 851 } else 852 Var_Set(".TARGETS", "", VAR_GLOBAL, 0); 853 854 855 /* 856 * If no user-supplied system path was given (through the -m option) 857 * add the directories from the DEFSYSPATH (more than one may be given 858 * as dir1:...:dirn) to the system include path. 859 */ 860 if (syspath == NULL || *syspath == '\0') 861 syspath = defsyspath; 862 else 863 syspath = strdup(syspath); 864 865 for (start = syspath; *start != '\0'; start = cp) { 866 for (cp = start; *cp != '\0' && *cp != ':'; cp++) 867 continue; 868 if (*cp == ':') { 869 *cp++ = '\0'; 870 } 871 /* look for magic parent directory search string */ 872 if (strncmp(".../", start, 4) != 0) { 873 (void)Dir_AddDir(defIncPath, start); 874 } else { 875 if (Dir_FindHereOrAbove(curdir, start+4, 876 found_path, sizeof(found_path))) { 877 (void)Dir_AddDir(defIncPath, found_path); 878 } 879 } 880 } 881 if (syspath != defsyspath) 882 free(syspath); 883 884 /* 885 * Read in the built-in rules first, followed by the specified 886 * makefile, if it was (makefile != NULL), or the default 887 * makefile and Makefile, in that order, if it wasn't. 888 */ 889 if (!noBuiltins) { 890 LstNode ln; 891 892 sysMkPath = Lst_Init(FALSE); 893 Dir_Expand(_PATH_DEFSYSMK, 894 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath, 895 sysMkPath); 896 if (Lst_IsEmpty(sysMkPath)) 897 Fatal("%s: no system rules (%s).", progname, 898 _PATH_DEFSYSMK); 899 ln = Lst_Find(sysMkPath, (ClientData)NULL, ReadMakefile); 900 if (ln != NILLNODE) 901 Fatal("%s: cannot open %s.", progname, 902 (char *)Lst_Datum(ln)); 903 } 904 905 if (!Lst_IsEmpty(makefiles)) { 906 LstNode ln; 907 908 ln = Lst_Find(makefiles, (ClientData)NULL, ReadMakefile); 909 if (ln != NILLNODE) 910 Fatal("%s: cannot open %s.", progname, 911 (char *)Lst_Datum(ln)); 912 } else if (!ReadMakefile(UNCONST("makefile"), NULL)) 913 (void)ReadMakefile(UNCONST("Makefile"), NULL); 914 915 (void)ReadMakefile(UNCONST(".depend"), NULL); 916 917 Var_Append("MFLAGS", Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1), VAR_GLOBAL); 918 if (p1) 919 free(p1); 920 921 if (!jobServer && !compatMake) 922 Job_ServerStart(maxJobs); 923 if (DEBUG(JOB)) 924 printf("job_pipe %d %d, maxjobs %d compat %d\n", 925 job_pipe[0], job_pipe[1], maxJobs, compatMake); 926 927 Main_ExportMAKEFLAGS(TRUE); /* initial export */ 928 929 Check_Cwd_av(0, NULL, 0); /* initialize it */ 930 931 932 /* 933 * For compatibility, look at the directories in the VPATH variable 934 * and add them to the search path, if the variable is defined. The 935 * variable's value is in the same format as the PATH envariable, i.e. 936 * <directory>:<directory>:<directory>... 937 */ 938 if (Var_Exists("VPATH", VAR_CMD)) { 939 char *vpath, savec; 940 /* 941 * GCC stores string constants in read-only memory, but 942 * Var_Subst will want to write this thing, so store it 943 * in an array 944 */ 945 static char VPATH[] = "${VPATH}"; 946 947 vpath = Var_Subst(NULL, VPATH, VAR_CMD, FALSE); 948 path = vpath; 949 do { 950 /* skip to end of directory */ 951 for (cp = path; *cp != ':' && *cp != '\0'; cp++) 952 continue; 953 /* Save terminator character so know when to stop */ 954 savec = *cp; 955 *cp = '\0'; 956 /* Add directory to search path */ 957 (void)Dir_AddDir(dirSearchPath, path); 958 *cp = savec; 959 path = cp + 1; 960 } while (savec == ':'); 961 free(vpath); 962 } 963 964 /* 965 * Now that all search paths have been read for suffixes et al, it's 966 * time to add the default search path to their lists... 967 */ 968 Suff_DoPaths(); 969 970 /* 971 * Propagate attributes through :: dependency lists. 972 * 973 * Also propagate recursive dependencies for .WAIT. 974 */ 975 Targ_Propagate(); 976 977 /* print the initial graph, if the user requested it */ 978 if (DEBUG(GRAPH1)) 979 Targ_PrintGraph(1); 980 981 /* print the values of any variables requested by the user */ 982 if (printVars) { 983 LstNode ln; 984 985 for (ln = Lst_First(variables); ln != NILLNODE; 986 ln = Lst_Succ(ln)) { 987 char *var = (char *)Lst_Datum(ln); 988 char *value; 989 990 if (strchr(var, '$')) { 991 value = p1 = Var_Subst(NULL, var, VAR_GLOBAL, 0); 992 } else { 993 value = Var_Value(var, VAR_GLOBAL, &p1); 994 } 995 printf("%s\n", value ? value : ""); 996 if (p1) 997 free(p1); 998 } 999 } 1000 1001 /* 1002 * Have now read the entire graph and need to make a list of targets 1003 * to create. If none was given on the command line, we consult the 1004 * parsing module to find the main target(s) to create. 1005 */ 1006 if (Lst_IsEmpty(create)) 1007 targs = Parse_MainName(); 1008 else 1009 targs = Targ_FindList(create, TARG_CREATE); 1010 1011 if (!compatMake && !printVars) { 1012 /* 1013 * Initialize job module before traversing the graph, now that 1014 * any .BEGIN and .END targets have been read. This is done 1015 * only if the -q flag wasn't given (to prevent the .BEGIN from 1016 * being executed should it exist). 1017 */ 1018 if (!queryFlag) { 1019 Job_Init(maxJobs); 1020 jobsRunning = TRUE; 1021 } 1022 1023 /* Traverse the graph, checking on all the targets */ 1024 outOfDate = Make_Run(targs); 1025 } else if (!printVars) { 1026 /* 1027 * Compat_Init will take care of creating all the targets as 1028 * well as initializing the module. 1029 */ 1030 Compat_Run(targs); 1031 } 1032 1033 #ifdef CLEANUP 1034 Lst_Destroy(targs, NOFREE); 1035 Lst_Destroy(variables, NOFREE); 1036 Lst_Destroy(makefiles, NOFREE); 1037 Lst_Destroy(create, (FreeProc *)free); 1038 #endif 1039 1040 /* print the graph now it's been processed if the user requested it */ 1041 if (DEBUG(GRAPH2)) 1042 Targ_PrintGraph(2); 1043 1044 Trace_Log(MAKEEND, 0); 1045 1046 Suff_End(); 1047 Targ_End(); 1048 Arch_End(); 1049 Var_End(); 1050 Parse_End(); 1051 Dir_End(); 1052 Job_End(); 1053 Trace_End(); 1054 1055 if (queryFlag && outOfDate) 1056 return(1); 1057 else 1058 return(0); 1059 } 1060 1061 /*- 1062 * ReadMakefile -- 1063 * Open and parse the given makefile. 1064 * 1065 * Results: 1066 * TRUE if ok. FALSE if couldn't open file. 1067 * 1068 * Side Effects: 1069 * lots 1070 */ 1071 static Boolean 1072 ReadMakefile(ClientData p, ClientData q __unused) 1073 { 1074 char *fname = p; /* makefile to read */ 1075 FILE *stream; 1076 size_t len = MAXPATHLEN; 1077 char *name, *path = emalloc(len); 1078 int setMAKEFILE; 1079 1080 if (!strcmp(fname, "-")) { 1081 Parse_File("(stdin)", stdin); 1082 Var_Set("MAKEFILE", "", VAR_GLOBAL, 0); 1083 } else { 1084 setMAKEFILE = strcmp(fname, ".depend"); 1085 1086 /* if we've chdir'd, rebuild the path name */ 1087 if (strcmp(curdir, objdir) && *fname != '/') { 1088 size_t plen = strlen(curdir) + strlen(fname) + 2; 1089 if (len < plen) 1090 path = erealloc(path, len = 2 * plen); 1091 1092 (void)snprintf(path, len, "%s/%s", curdir, fname); 1093 if ((stream = fopen(path, "r")) != NULL) { 1094 fname = path; 1095 goto found; 1096 } 1097 1098 /* If curdir failed, try objdir (ala .depend) */ 1099 plen = strlen(objdir) + strlen(fname) + 2; 1100 if (len < plen) 1101 path = erealloc(path, len = 2 * plen); 1102 (void)snprintf(path, len, "%s/%s", objdir, fname); 1103 if ((stream = fopen(path, "r")) != NULL) { 1104 fname = path; 1105 goto found; 1106 } 1107 } else if ((stream = fopen(fname, "r")) != NULL) 1108 goto found; 1109 /* look in -I and system include directories. */ 1110 name = Dir_FindFile(fname, parseIncPath); 1111 if (!name) 1112 name = Dir_FindFile(fname, 1113 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath); 1114 if (!name || !(stream = fopen(name, "r"))) { 1115 free(path); 1116 return(FALSE); 1117 } 1118 fname = name; 1119 /* 1120 * set the MAKEFILE variable desired by System V fans -- the 1121 * placement of the setting here means it gets set to the last 1122 * makefile specified, as it is set by SysV make. 1123 */ 1124 found: 1125 if (setMAKEFILE) 1126 Var_Set("MAKEFILE", fname, VAR_GLOBAL, 0); 1127 Parse_File(fname, stream); 1128 (void)fclose(stream); 1129 } 1130 free(path); 1131 return(TRUE); 1132 } 1133 1134 1135 /* 1136 * If MAKEOBJDIRPREFIX is in use, make ends up not in .CURDIR 1137 * in situations that would not arrise with ./obj (links or not). 1138 * This tends to break things like: 1139 * 1140 * build: 1141 * ${MAKE} includes 1142 * 1143 * This function spots when ${.MAKE:T} or ${.MAKE} is a command (as 1144 * opposed to an argument) in a command line and if so returns 1145 * ${.CURDIR} so caller can chdir() so that the assumptions made by 1146 * the Makefile hold true. 1147 * 1148 * If ${.MAKE} does not contain any '/', then ${.MAKE:T} is skipped. 1149 * 1150 * The chdir() only happens in the child process, and does nothing if 1151 * MAKEOBJDIRPREFIX and MAKEOBJDIR are not in the environment so it 1152 * should not break anything. Also if NOCHECKMAKECHDIR is set we 1153 * do nothing - to ensure historic semantics can be retained. 1154 */ 1155 static int Check_Cwd_Off = 0; 1156 1157 static char * 1158 Check_Cwd_av(int ac, char **av, int copy) 1159 { 1160 static char *make[4]; 1161 static char *cur_dir = NULL; 1162 char **mp; 1163 char *cp; 1164 int is_cmd, next_cmd; 1165 int i; 1166 int n; 1167 1168 if (Check_Cwd_Off) 1169 return NULL; 1170 1171 if (make[0] == NULL) { 1172 if (Var_Exists("NOCHECKMAKECHDIR", VAR_GLOBAL)) { 1173 Check_Cwd_Off = 1; 1174 return NULL; 1175 } 1176 1177 make[1] = Var_Value(".MAKE", VAR_GLOBAL, &cp); 1178 if ((make[0] = strrchr(make[1], '/')) == NULL) { 1179 make[0] = make[1]; 1180 make[1] = NULL; 1181 } else 1182 ++make[0]; 1183 make[2] = NULL; 1184 cur_dir = Var_Value(".CURDIR", VAR_GLOBAL, &cp); 1185 } 1186 if (ac == 0 || av == NULL) 1187 return NULL; /* initialization only */ 1188 1189 if (getenv("MAKEOBJDIR") == NULL && 1190 getenv("MAKEOBJDIRPREFIX") == NULL) 1191 return NULL; 1192 1193 1194 next_cmd = 1; 1195 for (i = 0; i < ac; ++i) { 1196 is_cmd = next_cmd; 1197 1198 n = strlen(av[i]); 1199 cp = &(av[i])[n - 1]; 1200 if (strspn(av[i], "|&;") == n) { 1201 next_cmd = 1; 1202 continue; 1203 } else if (*cp == ';' || *cp == '&' || *cp == '|' || *cp == ')') { 1204 next_cmd = 1; 1205 if (copy) { 1206 do { 1207 *cp-- = '\0'; 1208 } while (*cp == ';' || *cp == '&' || *cp == '|' || 1209 *cp == ')' || *cp == '}') ; 1210 } else { 1211 /* 1212 * XXX this should not happen. 1213 */ 1214 fprintf(stderr, "WARNING: raw arg ends in shell meta '%s'\n", 1215 av[i]); 1216 } 1217 } else 1218 next_cmd = 0; 1219 1220 cp = av[i]; 1221 if (*cp == ';' || *cp == '&' || *cp == '|') 1222 is_cmd = 1; 1223 1224 #ifdef check_cwd_debug 1225 fprintf(stderr, "av[%d] == %s '%s'", 1226 i, (is_cmd) ? "cmd" : "arg", av[i]); 1227 #endif 1228 if (is_cmd != 0) { 1229 if (*cp == '(' || *cp == '{' || 1230 *cp == ';' || *cp == '&' || *cp == '|') { 1231 do { 1232 ++cp; 1233 } while (*cp == '(' || *cp == '{' || 1234 *cp == ';' || *cp == '&' || *cp == '|'); 1235 if (*cp == '\0') { 1236 next_cmd = 1; 1237 continue; 1238 } 1239 } 1240 if (strcmp(cp, "cd") == 0 || strcmp(cp, "chdir") == 0) { 1241 #ifdef check_cwd_debug 1242 fprintf(stderr, " == cd, done.\n"); 1243 #endif 1244 return NULL; 1245 } 1246 for (mp = make; *mp != NULL; ++mp) { 1247 n = strlen(*mp); 1248 if (strcmp(cp, *mp) == 0) { 1249 #ifdef check_cwd_debug 1250 fprintf(stderr, " %s == '%s', chdir(%s)\n", 1251 cp, *mp, cur_dir); 1252 #endif 1253 return cur_dir; 1254 } 1255 } 1256 } 1257 #ifdef check_cwd_debug 1258 fprintf(stderr, "\n"); 1259 #endif 1260 } 1261 return NULL; 1262 } 1263 1264 char * 1265 Check_Cwd_Cmd(const char *cmd) 1266 { 1267 char *cp, *bp; 1268 char **av; 1269 int ac; 1270 1271 if (Check_Cwd_Off) 1272 return NULL; 1273 1274 if (cmd) { 1275 av = brk_string(cmd, &ac, TRUE, &bp); 1276 #ifdef check_cwd_debug 1277 fprintf(stderr, "splitting: '%s' -> %d words\n", 1278 cmd, ac); 1279 #endif 1280 } else { 1281 ac = 0; 1282 av = NULL; 1283 bp = NULL; 1284 } 1285 cp = Check_Cwd_av(ac, av, 1); 1286 if (bp) { 1287 free(av); 1288 free(bp); 1289 } 1290 return cp; 1291 } 1292 1293 void 1294 Check_Cwd(const char **argv) 1295 { 1296 char *cp; 1297 int ac; 1298 1299 if (Check_Cwd_Off) 1300 return; 1301 1302 for (ac = 0; argv[ac] != NULL; ++ac) 1303 /* NOTHING */; 1304 if (ac == 3 && *argv[1] == '-') { 1305 cp = Check_Cwd_Cmd(argv[2]); 1306 } else { 1307 cp = Check_Cwd_av(ac, UNCONST(argv), 0); 1308 } 1309 if (cp) { 1310 chdir(cp); 1311 } 1312 } 1313 1314 /*- 1315 * Cmd_Exec -- 1316 * Execute the command in cmd, and return the output of that command 1317 * in a string. 1318 * 1319 * Results: 1320 * A string containing the output of the command, or the empty string 1321 * If err is not NULL, it contains the reason for the command failure 1322 * 1323 * Side Effects: 1324 * The string must be freed by the caller. 1325 */ 1326 char * 1327 Cmd_Exec(const char *cmd, const char **err) 1328 { 1329 const char *args[4]; /* Args for invoking the shell */ 1330 int fds[2]; /* Pipe streams */ 1331 int cpid; /* Child PID */ 1332 int pid; /* PID from wait() */ 1333 char *res; /* result */ 1334 int status; /* command exit status */ 1335 Buffer buf; /* buffer to store the result */ 1336 char *cp; 1337 int cc; 1338 1339 1340 *err = NULL; 1341 1342 if (!shellName) 1343 Shell_Init(); 1344 /* 1345 * Set up arguments for shell 1346 */ 1347 args[0] = shellName; 1348 args[1] = "-c"; 1349 args[2] = cmd; 1350 args[3] = NULL; 1351 1352 /* 1353 * Open a pipe for fetching its output 1354 */ 1355 if (pipe(fds) == -1) { 1356 *err = "Couldn't create pipe for \"%s\""; 1357 goto bad; 1358 } 1359 1360 /* 1361 * Fork 1362 */ 1363 switch (cpid = vfork()) { 1364 case 0: 1365 /* 1366 * Close input side of pipe 1367 */ 1368 (void)close(fds[0]); 1369 1370 /* 1371 * Duplicate the output stream to the shell's output, then 1372 * shut the extra thing down. Note we don't fetch the error 1373 * stream...why not? Why? 1374 */ 1375 (void)dup2(fds[1], 1); 1376 (void)close(fds[1]); 1377 1378 (void)execv(shellPath, UNCONST(args)); 1379 _exit(1); 1380 /*NOTREACHED*/ 1381 1382 case -1: 1383 *err = "Couldn't exec \"%s\""; 1384 goto bad; 1385 1386 default: 1387 /* 1388 * No need for the writing half 1389 */ 1390 (void)close(fds[1]); 1391 1392 buf = Buf_Init(MAKE_BSIZE); 1393 1394 do { 1395 char result[BUFSIZ]; 1396 cc = read(fds[0], result, sizeof(result)); 1397 if (cc > 0) 1398 Buf_AddBytes(buf, cc, (Byte *)result); 1399 } 1400 while (cc > 0 || (cc == -1 && errno == EINTR)); 1401 1402 /* 1403 * Close the input side of the pipe. 1404 */ 1405 (void)close(fds[0]); 1406 1407 /* 1408 * Wait for the process to exit. 1409 */ 1410 while(((pid = wait(&status)) != cpid) && (pid >= 0)) 1411 continue; 1412 1413 res = (char *)Buf_GetAll(buf, &cc); 1414 Buf_Destroy(buf, FALSE); 1415 1416 if (cc == 0) 1417 *err = "Couldn't read shell's output for \"%s\""; 1418 1419 if (status) 1420 *err = "\"%s\" returned non-zero status"; 1421 1422 /* 1423 * Null-terminate the result, convert newlines to spaces and 1424 * install it in the variable. 1425 */ 1426 res[cc] = '\0'; 1427 cp = &res[cc]; 1428 1429 if (cc > 0 && *--cp == '\n') { 1430 /* 1431 * A final newline is just stripped 1432 */ 1433 *cp-- = '\0'; 1434 } 1435 while (cp >= res) { 1436 if (*cp == '\n') { 1437 *cp = ' '; 1438 } 1439 cp--; 1440 } 1441 break; 1442 } 1443 return res; 1444 bad: 1445 res = emalloc(1); 1446 *res = '\0'; 1447 return res; 1448 } 1449 1450 /*- 1451 * Error -- 1452 * Print an error message given its format. 1453 * 1454 * Results: 1455 * None. 1456 * 1457 * Side Effects: 1458 * The message is printed. 1459 */ 1460 /* VARARGS */ 1461 void 1462 Error(const char *fmt, ...) 1463 { 1464 va_list ap; 1465 1466 va_start(ap, fmt); 1467 fprintf(stderr, "%s: ", progname); 1468 (void)vfprintf(stderr, fmt, ap); 1469 va_end(ap); 1470 (void)fprintf(stderr, "\n"); 1471 (void)fflush(stderr); 1472 } 1473 1474 /*- 1475 * Fatal -- 1476 * Produce a Fatal error message. If jobs are running, waits for them 1477 * to finish. 1478 * 1479 * Results: 1480 * None 1481 * 1482 * Side Effects: 1483 * The program exits 1484 */ 1485 /* VARARGS */ 1486 void 1487 Fatal(const char *fmt, ...) 1488 { 1489 va_list ap; 1490 1491 va_start(ap, fmt); 1492 if (jobsRunning) 1493 Job_Wait(); 1494 1495 (void)vfprintf(stderr, fmt, ap); 1496 va_end(ap); 1497 (void)fprintf(stderr, "\n"); 1498 (void)fflush(stderr); 1499 1500 PrintOnError(NULL); 1501 1502 if (DEBUG(GRAPH2) || DEBUG(GRAPH3)) 1503 Targ_PrintGraph(2); 1504 Trace_Log(MAKEERROR, 0); 1505 exit(2); /* Not 1 so -q can distinguish error */ 1506 } 1507 1508 /* 1509 * Punt -- 1510 * Major exception once jobs are being created. Kills all jobs, prints 1511 * a message and exits. 1512 * 1513 * Results: 1514 * None 1515 * 1516 * Side Effects: 1517 * All children are killed indiscriminately and the program Lib_Exits 1518 */ 1519 /* VARARGS */ 1520 void 1521 Punt(const char *fmt, ...) 1522 { 1523 va_list ap; 1524 1525 va_start(ap, fmt); 1526 (void)fprintf(stderr, "%s: ", progname); 1527 (void)vfprintf(stderr, fmt, ap); 1528 va_end(ap); 1529 (void)fprintf(stderr, "\n"); 1530 (void)fflush(stderr); 1531 1532 PrintOnError(NULL); 1533 1534 DieHorribly(); 1535 } 1536 1537 /*- 1538 * DieHorribly -- 1539 * Exit without giving a message. 1540 * 1541 * Results: 1542 * None 1543 * 1544 * Side Effects: 1545 * A big one... 1546 */ 1547 void 1548 DieHorribly(void) 1549 { 1550 if (jobsRunning) 1551 Job_AbortAll(); 1552 if (DEBUG(GRAPH2)) 1553 Targ_PrintGraph(2); 1554 Trace_Log(MAKEERROR, 0); 1555 exit(2); /* Not 1, so -q can distinguish error */ 1556 } 1557 1558 /* 1559 * Finish -- 1560 * Called when aborting due to errors in child shell to signal 1561 * abnormal exit. 1562 * 1563 * Results: 1564 * None 1565 * 1566 * Side Effects: 1567 * The program exits 1568 */ 1569 void 1570 Finish(int errors) 1571 /* number of errors encountered in Make_Make */ 1572 { 1573 Fatal("%d error%s", errors, errors == 1 ? "" : "s"); 1574 } 1575 1576 /* 1577 * emalloc -- 1578 * malloc, but die on error. 1579 */ 1580 void * 1581 emalloc(size_t len) 1582 { 1583 void *p; 1584 1585 if ((p = malloc(len)) == NULL) 1586 enomem(); 1587 return(p); 1588 } 1589 1590 /* 1591 * estrdup -- 1592 * strdup, but die on error. 1593 */ 1594 char * 1595 estrdup(const char *str) 1596 { 1597 char *p; 1598 1599 if ((p = strdup(str)) == NULL) 1600 enomem(); 1601 return(p); 1602 } 1603 1604 /* 1605 * erealloc -- 1606 * realloc, but die on error. 1607 */ 1608 void * 1609 erealloc(void *ptr, size_t size) 1610 { 1611 if ((ptr = realloc(ptr, size)) == NULL) 1612 enomem(); 1613 return(ptr); 1614 } 1615 1616 /* 1617 * enomem -- 1618 * die when out of memory. 1619 */ 1620 void 1621 enomem(void) 1622 { 1623 (void)fprintf(stderr, "%s: %s.\n", progname, strerror(errno)); 1624 exit(2); 1625 } 1626 1627 /* 1628 * enunlink -- 1629 * Remove a file carefully, avoiding directories. 1630 */ 1631 int 1632 eunlink(const char *file) 1633 { 1634 struct stat st; 1635 1636 if (lstat(file, &st) == -1) 1637 return -1; 1638 1639 if (S_ISDIR(st.st_mode)) { 1640 errno = EISDIR; 1641 return -1; 1642 } 1643 return unlink(file); 1644 } 1645 1646 /* 1647 * execError -- 1648 * Print why exec failed, avoiding stdio. 1649 */ 1650 void 1651 execError(const char *af, const char *av) 1652 { 1653 #ifdef USE_IOVEC 1654 int i = 0; 1655 struct iovec iov[8]; 1656 #define IOADD(s) \ 1657 (void)(iov[i].iov_base = UNCONST(s), \ 1658 iov[i].iov_len = strlen(iov[i].iov_base), \ 1659 i++) 1660 #else 1661 #define IOADD(void)write(2, s, strlen(s)) 1662 #endif 1663 1664 IOADD(progname); 1665 IOADD(": "); 1666 IOADD(af); 1667 IOADD("("); 1668 IOADD(av); 1669 IOADD(") failed ("); 1670 IOADD(strerror(errno)); 1671 IOADD(")\n"); 1672 1673 #ifdef USE_IOVEC 1674 (void)writev(2, iov, 8); 1675 #endif 1676 } 1677 1678 /* 1679 * usage -- 1680 * exit with usage message 1681 */ 1682 static void 1683 usage(void) 1684 { 1685 (void)fprintf(stderr, 1686 "usage: %s [-BeikNnqrstWX] [-D variable] [-d flags] [-f makefile]\n\ 1687 [-I directory] [-J private] [-j max_jobs] [-m directory] [-T file]\n\ 1688 [-V variable] [variable=value] [target ...]\n", progname); 1689 exit(2); 1690 } 1691 1692 1693 int 1694 PrintAddr(ClientData a, ClientData b) 1695 { 1696 printf("%lx ", (unsigned long) a); 1697 return b ? 0 : 0; 1698 } 1699 1700 1701 1702 void 1703 PrintOnError(const char *s) 1704 { 1705 char tmp[64]; 1706 1707 if (s) 1708 printf("%s", s); 1709 1710 printf("\n%s: stopped in %s\n", progname, curdir); 1711 strncpy(tmp, "${MAKE_PRINT_VAR_ON_ERROR:@v@$v='${$v}'\n@}", 1712 sizeof(tmp) - 1); 1713 s = Var_Subst(NULL, tmp, VAR_GLOBAL, 0); 1714 if (s && *s) 1715 printf("%s", s); 1716 } 1717 1718 void 1719 Main_ExportMAKEFLAGS(Boolean first) 1720 { 1721 static int once = 1; 1722 char tmp[64]; 1723 char *s; 1724 1725 if (once != first) 1726 return; 1727 once = 0; 1728 1729 strncpy(tmp, "${.MAKEFLAGS} ${.MAKEOVERRIDES:O:u:@v@$v=${$v:Q}@}", 1730 sizeof(tmp)); 1731 s = Var_Subst(NULL, tmp, VAR_CMD, 0); 1732 if (s && *s) { 1733 #ifdef POSIX 1734 setenv("MAKEFLAGS", s, 1); 1735 #else 1736 setenv("MAKE", s, 1); 1737 #endif 1738 } 1739 } 1740