1 /* $NetBSD: main.c,v 1.130 2006/08/26 22:19:03 christos 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 1.130 2006/08/26 22:19:03 christos 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 1.130 2006/08/26 22:19:03 christos 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 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 usePipes; /* !-P flag */ 168 Boolean ignoreErrors; /* -i flag */ 169 Boolean beSilent; /* -s flag */ 170 Boolean oldVars; /* variable substitution style */ 171 Boolean checkEnvFirst; /* -e flag */ 172 Boolean parseWarnFatal; /* -W flag */ 173 Boolean jobServer; /* -J flag */ 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 /*- 191 * MainParseArgs -- 192 * Parse a given argument vector. Called from main() and from 193 * Main_ParseArgLine() when the .MAKEFLAGS target is used. 194 * 195 * XXX: Deal with command line overriding .MAKEFLAGS in makefile 196 * 197 * Results: 198 * None 199 * 200 * Side Effects: 201 * Various global and local flags will be set depending on the flags 202 * given 203 */ 204 static void 205 MainParseArgs(int argc, char **argv) 206 { 207 char *p; 208 int c = '?'; 209 int arginc; 210 char *argvalue, *modules; 211 const char *getopt_def; 212 char *optscan; 213 Boolean inOption, dashDash = FALSE; 214 char found_path[MAXPATHLEN + 1]; /* for searching for sys.mk */ 215 216 #define OPTFLAGS "BD:I:J:NPST:V:WXd:ef:ij:km:nqrst" 217 /* Can't actually use getopt(3) because rescanning is not portable */ 218 219 getopt_def = OPTFLAGS; 220 rearg: 221 inOption = FALSE; 222 optscan = NULL; 223 while(argc > 1) { 224 char *getopt_spec; 225 if(!inOption) 226 optscan = argv[1]; 227 c = *optscan++; 228 arginc = 0; 229 if(inOption) { 230 if(c == '\0') { 231 ++argv; 232 --argc; 233 inOption = FALSE; 234 continue; 235 } 236 } else { 237 if (c != '-' || dashDash) 238 break; 239 inOption = TRUE; 240 c = *optscan++; 241 } 242 /* '-' found at some earlier point */ 243 getopt_spec = strchr(getopt_def, c); 244 if(c != '\0' && getopt_spec != NULL && getopt_spec[1] == ':') { 245 /* -<something> found, and <something> should have an arg */ 246 inOption = FALSE; 247 arginc = 1; 248 argvalue = optscan; 249 if(*argvalue == '\0') { 250 if (argc < 3) 251 goto noarg; 252 argvalue = argv[2]; 253 arginc = 2; 254 } 255 } else { 256 argvalue = NULL; 257 } 258 switch(c) { 259 case '\0': 260 arginc = 1; 261 inOption = FALSE; 262 break; 263 case 'B': 264 compatMake = TRUE; 265 Var_Append(MAKEFLAGS, "-B", VAR_GLOBAL); 266 break; 267 case 'D': 268 if (argvalue == NULL) goto noarg; 269 Var_Set(argvalue, "1", VAR_GLOBAL, 0); 270 Var_Append(MAKEFLAGS, "-D", VAR_GLOBAL); 271 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 272 break; 273 case 'I': 274 if (argvalue == NULL) goto noarg; 275 Parse_AddIncludeDir(argvalue); 276 Var_Append(MAKEFLAGS, "-I", VAR_GLOBAL); 277 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 278 break; 279 case 'J': 280 if (argvalue == NULL) goto noarg; 281 if (sscanf(argvalue, "%d,%d", &job_pipe[0], &job_pipe[1]) != 2) { 282 /* backslash to avoid trigraph ??) */ 283 (void)fprintf(stderr, 284 "%s: internal error -- J option malformed (%s?\?)\n", 285 progname, argvalue); 286 usage(); 287 } 288 if ((fcntl(job_pipe[0], F_GETFD, 0) < 0) || 289 (fcntl(job_pipe[1], F_GETFD, 0) < 0)) { 290 #if 0 291 (void)fprintf(stderr, 292 "%s: ###### warning -- J descriptors were closed!\n", 293 progname); 294 exit(2); 295 #endif 296 job_pipe[0] = -1; 297 job_pipe[1] = -1; 298 compatMake = TRUE; 299 } else { 300 Var_Append(MAKEFLAGS, "-J", VAR_GLOBAL); 301 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 302 jobServer = TRUE; 303 } 304 break; 305 case 'N': 306 noExecute = TRUE; 307 noRecursiveExecute = TRUE; 308 Var_Append(MAKEFLAGS, "-N", VAR_GLOBAL); 309 break; 310 case 'P': 311 usePipes = FALSE; 312 Var_Append(MAKEFLAGS, "-P", VAR_GLOBAL); 313 break; 314 case 'S': 315 keepgoing = FALSE; 316 Var_Append(MAKEFLAGS, "-S", VAR_GLOBAL); 317 break; 318 case 'T': 319 if (argvalue == NULL) goto noarg; 320 tracefile = estrdup(argvalue); 321 Var_Append(MAKEFLAGS, "-T", VAR_GLOBAL); 322 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 323 break; 324 case 'V': 325 if (argvalue == NULL) goto noarg; 326 printVars = TRUE; 327 (void)Lst_AtEnd(variables, (ClientData)argvalue); 328 Var_Append(MAKEFLAGS, "-V", VAR_GLOBAL); 329 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 330 break; 331 case 'W': 332 parseWarnFatal = TRUE; 333 break; 334 case 'X': 335 varNoExportEnv = TRUE; 336 Var_Append(MAKEFLAGS, "-X", VAR_GLOBAL); 337 break; 338 case 'd': { 339 if (argvalue == NULL) goto noarg; 340 for (modules = argvalue; *modules; ++modules) 341 switch (*modules) { 342 case 'A': 343 debug = ~0; 344 break; 345 case 'a': 346 debug |= DEBUG_ARCH; 347 break; 348 case 'c': 349 debug |= DEBUG_COND; 350 break; 351 case 'd': 352 debug |= DEBUG_DIR; 353 break; 354 case 'e': 355 debug |= DEBUG_ERROR; 356 break; 357 case 'f': 358 debug |= DEBUG_FOR; 359 break; 360 case 'g': 361 if (modules[1] == '1') { 362 debug |= DEBUG_GRAPH1; 363 ++modules; 364 } 365 else if (modules[1] == '2') { 366 debug |= DEBUG_GRAPH2; 367 ++modules; 368 } 369 else if (modules[1] == '3') { 370 debug |= DEBUG_GRAPH3; 371 ++modules; 372 } 373 break; 374 case 'j': 375 debug |= DEBUG_JOB; 376 break; 377 case 'm': 378 debug |= DEBUG_MAKE; 379 break; 380 case 'n': 381 debug |= DEBUG_SCRIPT; 382 break; 383 case 'p': 384 debug |= DEBUG_PARSE; 385 break; 386 case 's': 387 debug |= DEBUG_SUFF; 388 break; 389 case 't': 390 debug |= DEBUG_TARG; 391 break; 392 case 'v': 393 debug |= DEBUG_VAR; 394 break; 395 case 'x': 396 debug |= DEBUG_SHELL; 397 break; 398 default: 399 (void)fprintf(stderr, 400 "%s: illegal argument to d option -- %c\n", 401 progname, *modules); 402 usage(); 403 } 404 Var_Append(MAKEFLAGS, "-d", VAR_GLOBAL); 405 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 406 break; 407 } 408 case 'e': 409 checkEnvFirst = TRUE; 410 Var_Append(MAKEFLAGS, "-e", VAR_GLOBAL); 411 break; 412 case 'f': 413 if (argvalue == NULL) goto noarg; 414 (void)Lst_AtEnd(makefiles, (ClientData)argvalue); 415 break; 416 case 'i': 417 ignoreErrors = TRUE; 418 Var_Append(MAKEFLAGS, "-i", VAR_GLOBAL); 419 break; 420 case 'j': 421 if (argvalue == NULL) goto noarg; 422 forceJobs = TRUE; 423 maxJobs = strtol(argvalue, &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, argvalue, VAR_GLOBAL); 431 maxJobTokens = maxJobs; 432 break; 433 case 'k': 434 keepgoing = TRUE; 435 Var_Append(MAKEFLAGS, "-k", VAR_GLOBAL); 436 break; 437 case 'm': 438 if (argvalue == NULL) goto noarg; 439 /* look for magic parent directory search string */ 440 if (strncmp(".../", argvalue, 4) == 0) { 441 if (!Dir_FindHereOrAbove(curdir, argvalue+4, 442 found_path, sizeof(found_path))) 443 break; /* nothing doing */ 444 (void)Dir_AddDir(sysIncPath, found_path); 445 446 } else { 447 (void)Dir_AddDir(sysIncPath, argvalue); 448 } 449 Var_Append(MAKEFLAGS, "-m", VAR_GLOBAL); 450 Var_Append(MAKEFLAGS, argvalue, VAR_GLOBAL); 451 break; 452 case 'n': 453 noExecute = TRUE; 454 Var_Append(MAKEFLAGS, "-n", VAR_GLOBAL); 455 break; 456 case 'q': 457 queryFlag = TRUE; 458 /* Kind of nonsensical, wot? */ 459 Var_Append(MAKEFLAGS, "-q", VAR_GLOBAL); 460 break; 461 case 'r': 462 noBuiltins = TRUE; 463 Var_Append(MAKEFLAGS, "-r", VAR_GLOBAL); 464 break; 465 case 's': 466 beSilent = TRUE; 467 Var_Append(MAKEFLAGS, "-s", VAR_GLOBAL); 468 break; 469 case 't': 470 touchFlag = TRUE; 471 Var_Append(MAKEFLAGS, "-t", VAR_GLOBAL); 472 break; 473 case '-': 474 dashDash = TRUE; 475 break; 476 default: 477 case '?': 478 usage(); 479 } 480 argv += arginc; 481 argc -= arginc; 482 } 483 484 oldVars = TRUE; 485 486 /* 487 * See if the rest of the arguments are variable assignments and 488 * perform them if so. Else take them to be targets and stuff them 489 * on the end of the "create" list. 490 */ 491 for (; argc > 1; ++argv, --argc) 492 if (Parse_IsVar(argv[1])) { 493 Parse_DoVar(argv[1], VAR_CMD); 494 } else { 495 if (!*argv[1]) 496 Punt("illegal (null) argument."); 497 if (*argv[1] == '-' && !dashDash) 498 goto rearg; 499 (void)Lst_AtEnd(create, (ClientData)estrdup(argv[1])); 500 } 501 502 return; 503 noarg: 504 (void)fprintf(stderr, "%s: option requires an argument -- %c\n", 505 progname, c); 506 usage(); 507 } 508 509 /*- 510 * Main_ParseArgLine -- 511 * Used by the parse module when a .MFLAGS or .MAKEFLAGS target 512 * is encountered and by main() when reading the .MAKEFLAGS envariable. 513 * Takes a line of arguments and breaks it into its 514 * component words and passes those words and the number of them to the 515 * MainParseArgs function. 516 * The line should have all its leading whitespace removed. 517 * 518 * Input: 519 * line Line to fracture 520 * 521 * Results: 522 * None 523 * 524 * Side Effects: 525 * Only those that come from the various arguments. 526 */ 527 void 528 Main_ParseArgLine(char *line) 529 { 530 char **argv; /* Manufactured argument vector */ 531 int argc; /* Number of arguments in argv */ 532 char *args; /* Space used by the args */ 533 char *buf, *p1; 534 char *argv0 = Var_Value(".MAKE", VAR_GLOBAL, &p1); 535 size_t len; 536 537 if (line == NULL) 538 return; 539 for (; *line == ' '; ++line) 540 continue; 541 if (!*line) 542 return; 543 544 buf = emalloc(len = strlen(line) + strlen(argv0) + 2); 545 (void)snprintf(buf, len, "%s %s", argv0, line); 546 if (p1) 547 free(p1); 548 549 argv = brk_string(buf, &argc, TRUE, &args); 550 free(buf); 551 MainParseArgs(argc, argv); 552 553 free(args); 554 free(argv); 555 } 556 557 Boolean 558 Main_SetObjdir(const char *path) 559 { 560 struct stat sb; 561 char *p = NULL; 562 char buf[MAXPATHLEN + 1]; 563 Boolean rc = FALSE; 564 565 /* expand variable substitutions */ 566 if (strchr(path, '$') != 0) { 567 snprintf(buf, MAXPATHLEN, "%s", path); 568 path = p = Var_Subst(NULL, buf, VAR_GLOBAL, 0); 569 } 570 571 if (path[0] != '/') { 572 snprintf(buf, MAXPATHLEN, "%s/%s", curdir, path); 573 path = buf; 574 } 575 576 /* look for the directory and try to chdir there */ 577 if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) { 578 if (chdir(path)) { 579 (void)fprintf(stderr, "make warning: %s: %s.\n", 580 path, strerror(errno)); 581 } else { 582 strncpy(objdir, path, MAXPATHLEN); 583 Var_Set(".OBJDIR", objdir, VAR_GLOBAL, 0); 584 setenv("PWD", objdir, 1); 585 Dir_InitDot(); 586 rc = TRUE; 587 } 588 } 589 590 if (p) 591 free(p); 592 return rc; 593 } 594 595 /*- 596 * ReadAllMakefiles -- 597 * wrapper around ReadMakefile() to read all. 598 * 599 * Results: 600 * TRUE if ok, FALSE on error 601 */ 602 static int 603 ReadAllMakefiles(ClientData p, ClientData q) 604 { 605 return (ReadMakefile(p, q) == 0); 606 } 607 608 /*- 609 * main -- 610 * The main function, for obvious reasons. Initializes variables 611 * and a few modules, then parses the arguments give it in the 612 * environment and on the command line. Reads the system makefile 613 * followed by either Makefile, makefile or the file given by the 614 * -f argument. Sets the .MAKEFLAGS PMake variable based on all the 615 * flags it has received by then uses either the Make or the Compat 616 * module to create the initial list of targets. 617 * 618 * Results: 619 * If -q was given, exits -1 if anything was out-of-date. Else it exits 620 * 0. 621 * 622 * Side Effects: 623 * The program exits when done. Targets are created. etc. etc. etc. 624 */ 625 int 626 main(int argc, char **argv) 627 { 628 Lst targs; /* target nodes to create -- passed to Make_Init */ 629 Boolean outOfDate = TRUE; /* FALSE if all targets up to date */ 630 struct stat sb, sa; 631 char *p1, *path, *pwd; 632 char mdpath[MAXPATHLEN]; 633 char *machine = getenv("MACHINE"); 634 const char *machine_arch = getenv("MACHINE_ARCH"); 635 char *syspath = getenv("MAKESYSPATH"); 636 Lst sysMkPath; /* Path of sys.mk */ 637 char *cp = NULL, *start; 638 /* avoid faults on read-only strings */ 639 static char defsyspath[] = _PATH_DEFSYSPATH; 640 char found_path[MAXPATHLEN + 1]; /* for searching for sys.mk */ 641 struct timeval rightnow; /* to initialize random seed */ 642 #ifdef MAKE_NATIVE 643 struct utsname utsname; 644 #endif 645 646 /* 647 * Set the seed to produce a different random sequences 648 * on each program execution. 649 */ 650 gettimeofday(&rightnow, NULL); 651 srandom(rightnow.tv_sec + rightnow.tv_usec); 652 653 if ((progname = strrchr(argv[0], '/')) != NULL) 654 progname++; 655 else 656 progname = argv[0]; 657 #ifdef RLIMIT_NOFILE 658 /* 659 * get rid of resource limit on file descriptors 660 */ 661 { 662 struct rlimit rl; 663 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 && 664 rl.rlim_cur != rl.rlim_max) { 665 rl.rlim_cur = rl.rlim_max; 666 (void)setrlimit(RLIMIT_NOFILE, &rl); 667 } 668 } 669 #endif 670 /* 671 * Find where we are and take care of PWD for the automounter... 672 * All this code is so that we know where we are when we start up 673 * on a different machine with pmake. 674 */ 675 if (getcwd(curdir, MAXPATHLEN) == NULL) { 676 (void)fprintf(stderr, "%s: %s.\n", progname, strerror(errno)); 677 exit(2); 678 } 679 680 if (stat(curdir, &sa) == -1) { 681 (void)fprintf(stderr, "%s: %s: %s.\n", 682 progname, curdir, strerror(errno)); 683 exit(2); 684 } 685 686 /* 687 * Overriding getcwd() with $PWD totally breaks MAKEOBJDIRPREFIX 688 * since the value of curdir can very depending on how we got 689 * here. Ie sitting at a shell prompt (shell that provides $PWD) 690 * or via subdir.mk in which case its likely a shell which does 691 * not provide it. 692 * So, to stop it breaking this case only, we ignore PWD if 693 * MAKEOBJDIRPREFIX is set or MAKEOBJDIR contains a transform. 694 */ 695 if ((pwd = getenv("PWD")) != NULL && getenv("MAKEOBJDIRPREFIX") == NULL) { 696 const char *makeobjdir = getenv("MAKEOBJDIR"); 697 698 if (makeobjdir == NULL || !strchr(makeobjdir, '$')) { 699 if (stat(pwd, &sb) == 0 && sa.st_ino == sb.st_ino && 700 sa.st_dev == sb.st_dev) 701 (void)strncpy(curdir, pwd, MAXPATHLEN); 702 } 703 } 704 705 /* 706 * Get the name of this type of MACHINE from utsname 707 * so we can share an executable for similar machines. 708 * (i.e. m68k: amiga hp300, mac68k, sun3, ...) 709 * 710 * Note that both MACHINE and MACHINE_ARCH are decided at 711 * run-time. 712 */ 713 if (!machine) { 714 #ifdef MAKE_NATIVE 715 if (uname(&utsname) == -1) { 716 (void)fprintf(stderr, "%s: uname failed (%s).\n", progname, 717 strerror(errno)); 718 exit(2); 719 } 720 machine = utsname.machine; 721 #else 722 #ifdef MAKE_MACHINE 723 machine = MAKE_MACHINE; 724 #else 725 machine = "unknown"; 726 #endif 727 #endif 728 } 729 730 if (!machine_arch) { 731 #ifndef MACHINE_ARCH 732 #ifdef MAKE_MACHINE_ARCH 733 machine_arch = MAKE_MACHINE_ARCH; 734 #else 735 machine_arch = "unknown"; 736 #endif 737 #else 738 machine_arch = MACHINE_ARCH; 739 #endif 740 } 741 742 /* 743 * Just in case MAKEOBJDIR wants us to do something tricky. 744 */ 745 Var_Init(); /* Initialize the lists of variables for 746 * parsing arguments */ 747 Var_Set(".CURDIR", curdir, VAR_GLOBAL, 0); 748 Var_Set("MACHINE", machine, VAR_GLOBAL, 0); 749 Var_Set("MACHINE_ARCH", machine_arch, VAR_GLOBAL, 0); 750 #ifdef MAKE_VERSION 751 Var_Set("MAKE_VERSION", MAKE_VERSION, VAR_GLOBAL, 0); 752 #endif 753 Var_Set(".newline", "\n", VAR_GLOBAL, 0); /* handy for :@ loops */ 754 755 /* 756 * Find the .OBJDIR. If MAKEOBJDIRPREFIX, or failing that, 757 * MAKEOBJDIR is set in the environment, try only that value 758 * and fall back to .CURDIR if it does not exist. 759 * 760 * Otherwise, try _PATH_OBJDIR.MACHINE, _PATH_OBJDIR, and 761 * finally _PATH_OBJDIRPREFIX`pwd`, in that order. If none 762 * of these paths exist, just use .CURDIR. 763 */ 764 Dir_Init(curdir); 765 (void)Main_SetObjdir(curdir); 766 767 if ((path = getenv("MAKEOBJDIRPREFIX")) != NULL) { 768 (void)snprintf(mdpath, MAXPATHLEN, "%s%s", path, curdir); 769 (void)Main_SetObjdir(mdpath); 770 } else if ((path = getenv("MAKEOBJDIR")) != NULL) { 771 (void)Main_SetObjdir(path); 772 } else { 773 (void)snprintf(mdpath, MAXPATHLEN, "%s.%s", _PATH_OBJDIR, machine); 774 if (!Main_SetObjdir(mdpath) && !Main_SetObjdir(_PATH_OBJDIR)) { 775 (void)snprintf(mdpath, MAXPATHLEN, "%s%s", 776 _PATH_OBJDIRPREFIX, curdir); 777 (void)Main_SetObjdir(mdpath); 778 } 779 } 780 781 create = Lst_Init(FALSE); 782 makefiles = Lst_Init(FALSE); 783 printVars = FALSE; 784 variables = Lst_Init(FALSE); 785 beSilent = FALSE; /* Print commands as executed */ 786 ignoreErrors = FALSE; /* Pay attention to non-zero returns */ 787 noExecute = FALSE; /* Execute all commands */ 788 noRecursiveExecute = FALSE; /* Execute all .MAKE targets */ 789 keepgoing = FALSE; /* Stop on error */ 790 allPrecious = FALSE; /* Remove targets when interrupted */ 791 queryFlag = FALSE; /* This is not just a check-run */ 792 noBuiltins = FALSE; /* Read the built-in rules */ 793 touchFlag = FALSE; /* Actually update targets */ 794 usePipes = TRUE; /* Catch child output in pipes */ 795 debug = 0; /* No debug verbosity, please. */ 796 jobsRunning = FALSE; 797 798 maxJobs = DEFMAXLOCAL; /* Set default local max concurrency */ 799 maxJobTokens = maxJobs; 800 compatMake = FALSE; /* No compat mode */ 801 802 803 /* 804 * Initialize the parsing, directory and variable modules to prepare 805 * for the reading of inclusion paths and variable settings on the 806 * command line 807 */ 808 809 /* 810 * Initialize various variables. 811 * MAKE also gets this name, for compatibility 812 * .MAKEFLAGS gets set to the empty string just in case. 813 * MFLAGS also gets initialized empty, for compatibility. 814 */ 815 Parse_Init(); 816 Var_Set("MAKE", argv[0], VAR_GLOBAL, 0); 817 Var_Set(".MAKE", argv[0], VAR_GLOBAL, 0); 818 Var_Set(MAKEFLAGS, "", VAR_GLOBAL, 0); 819 Var_Set(MAKEOVERRIDES, "", VAR_GLOBAL, 0); 820 Var_Set("MFLAGS", "", VAR_GLOBAL, 0); 821 Var_Set(".ALLTARGETS", "", VAR_GLOBAL, 0); 822 823 /* 824 * First snag any flags out of the MAKE environment variable. 825 * (Note this is *not* MAKEFLAGS since /bin/make uses that and it's 826 * in a different format). 827 */ 828 #ifdef POSIX 829 Main_ParseArgLine(getenv("MAKEFLAGS")); 830 #else 831 Main_ParseArgLine(getenv("MAKE")); 832 #endif 833 834 MainParseArgs(argc, argv); 835 836 /* 837 * Be compatible if user did not specify -j and did not explicitly 838 * turned compatibility on 839 */ 840 if (!compatMake && !forceJobs) { 841 compatMake = TRUE; 842 } 843 844 /* 845 * Initialize archive, target and suffix modules in preparation for 846 * parsing the makefile(s) 847 */ 848 Arch_Init(); 849 Targ_Init(); 850 Suff_Init(); 851 Trace_Init(tracefile); 852 853 DEFAULT = NILGNODE; 854 (void)time(&now); 855 856 Trace_Log(MAKESTART, NULL); 857 858 /* 859 * Set up the .TARGETS variable to contain the list of targets to be 860 * created. If none specified, make the variable empty -- the parser 861 * will fill the thing in with the default or .MAIN target. 862 */ 863 if (!Lst_IsEmpty(create)) { 864 LstNode ln; 865 866 for (ln = Lst_First(create); ln != NILLNODE; 867 ln = Lst_Succ(ln)) { 868 char *name = (char *)Lst_Datum(ln); 869 870 Var_Append(".TARGETS", name, VAR_GLOBAL); 871 } 872 } else 873 Var_Set(".TARGETS", "", VAR_GLOBAL, 0); 874 875 876 /* 877 * If no user-supplied system path was given (through the -m option) 878 * add the directories from the DEFSYSPATH (more than one may be given 879 * as dir1:...:dirn) to the system include path. 880 */ 881 if (syspath == NULL || *syspath == '\0') 882 syspath = defsyspath; 883 else 884 syspath = strdup(syspath); 885 886 for (start = syspath; *start != '\0'; start = cp) { 887 for (cp = start; *cp != '\0' && *cp != ':'; cp++) 888 continue; 889 if (*cp == ':') { 890 *cp++ = '\0'; 891 } 892 /* look for magic parent directory search string */ 893 if (strncmp(".../", start, 4) != 0) { 894 (void)Dir_AddDir(defIncPath, start); 895 } else { 896 if (Dir_FindHereOrAbove(curdir, start+4, 897 found_path, sizeof(found_path))) { 898 (void)Dir_AddDir(defIncPath, found_path); 899 } 900 } 901 } 902 if (syspath != defsyspath) 903 free(syspath); 904 905 /* 906 * Read in the built-in rules first, followed by the specified 907 * makefile, if it was (makefile != NULL), or the default 908 * makefile and Makefile, in that order, if it wasn't. 909 */ 910 if (!noBuiltins) { 911 LstNode ln; 912 913 sysMkPath = Lst_Init(FALSE); 914 Dir_Expand(_PATH_DEFSYSMK, 915 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath, 916 sysMkPath); 917 if (Lst_IsEmpty(sysMkPath)) 918 Fatal("%s: no system rules (%s).", progname, 919 _PATH_DEFSYSMK); 920 ln = Lst_Find(sysMkPath, (ClientData)NULL, ReadMakefile); 921 if (ln == NILLNODE) 922 Fatal("%s: cannot open %s.", progname, 923 (char *)Lst_Datum(ln)); 924 } 925 926 if (!Lst_IsEmpty(makefiles)) { 927 LstNode ln; 928 929 ln = Lst_Find(makefiles, (ClientData)NULL, ReadAllMakefiles); 930 if (ln != NILLNODE) 931 Fatal("%s: cannot open %s.", progname, 932 (char *)Lst_Datum(ln)); 933 } else if (ReadMakefile(UNCONST("makefile"), NULL) != 0) 934 (void)ReadMakefile(UNCONST("Makefile"), NULL); 935 936 (void)ReadMakefile(UNCONST(".depend"), NULL); 937 938 Var_Append("MFLAGS", Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1), VAR_GLOBAL); 939 if (p1) 940 free(p1); 941 942 if (!jobServer && !compatMake) 943 Job_ServerStart(); 944 if (DEBUG(JOB)) 945 printf("job_pipe %d %d, maxjobs %d, tokens %d, compat %d\n", 946 job_pipe[0], job_pipe[1], maxJobs, maxJobTokens, compatMake); 947 948 Main_ExportMAKEFLAGS(TRUE); /* initial export */ 949 950 Check_Cwd_av(0, NULL, 0); /* initialize it */ 951 952 953 /* 954 * For compatibility, look at the directories in the VPATH variable 955 * and add them to the search path, if the variable is defined. The 956 * variable's value is in the same format as the PATH envariable, i.e. 957 * <directory>:<directory>:<directory>... 958 */ 959 if (Var_Exists("VPATH", VAR_CMD)) { 960 char *vpath, savec; 961 /* 962 * GCC stores string constants in read-only memory, but 963 * Var_Subst will want to write this thing, so store it 964 * in an array 965 */ 966 static char VPATH[] = "${VPATH}"; 967 968 vpath = Var_Subst(NULL, VPATH, VAR_CMD, FALSE); 969 path = vpath; 970 do { 971 /* skip to end of directory */ 972 for (cp = path; *cp != ':' && *cp != '\0'; cp++) 973 continue; 974 /* Save terminator character so know when to stop */ 975 savec = *cp; 976 *cp = '\0'; 977 /* Add directory to search path */ 978 (void)Dir_AddDir(dirSearchPath, path); 979 *cp = savec; 980 path = cp + 1; 981 } while (savec == ':'); 982 free(vpath); 983 } 984 985 /* 986 * Now that all search paths have been read for suffixes et al, it's 987 * time to add the default search path to their lists... 988 */ 989 Suff_DoPaths(); 990 991 /* 992 * Propagate attributes through :: dependency lists. 993 * 994 * Also propagate recursive dependencies for .WAIT. 995 */ 996 Targ_Propagate(); 997 998 /* print the initial graph, if the user requested it */ 999 if (DEBUG(GRAPH1)) 1000 Targ_PrintGraph(1); 1001 1002 /* print the values of any variables requested by the user */ 1003 if (printVars) { 1004 LstNode ln; 1005 1006 for (ln = Lst_First(variables); ln != NILLNODE; 1007 ln = Lst_Succ(ln)) { 1008 char *var = (char *)Lst_Datum(ln); 1009 char *value; 1010 1011 if (strchr(var, '$')) { 1012 value = p1 = Var_Subst(NULL, var, VAR_GLOBAL, 0); 1013 } else { 1014 value = Var_Value(var, VAR_GLOBAL, &p1); 1015 } 1016 printf("%s\n", value ? value : ""); 1017 if (p1) 1018 free(p1); 1019 } 1020 } 1021 1022 /* 1023 * Have now read the entire graph and need to make a list of targets 1024 * to create. If none was given on the command line, we consult the 1025 * parsing module to find the main target(s) to create. 1026 */ 1027 if (Lst_IsEmpty(create)) 1028 targs = Parse_MainName(); 1029 else 1030 targs = Targ_FindList(create, TARG_CREATE); 1031 1032 if (!compatMake && !printVars) { 1033 /* 1034 * Initialize job module before traversing the graph, now that 1035 * any .BEGIN and .END targets have been read. This is done 1036 * only if the -q flag wasn't given (to prevent the .BEGIN from 1037 * being executed should it exist). 1038 */ 1039 if (!queryFlag) { 1040 Job_Init(); 1041 jobsRunning = TRUE; 1042 } 1043 1044 /* Traverse the graph, checking on all the targets */ 1045 outOfDate = Make_Run(targs); 1046 } else if (!printVars) { 1047 /* 1048 * Compat_Init will take care of creating all the targets as 1049 * well as initializing the module. 1050 */ 1051 Compat_Run(targs); 1052 } 1053 1054 #ifdef CLEANUP 1055 Lst_Destroy(targs, NOFREE); 1056 Lst_Destroy(variables, NOFREE); 1057 Lst_Destroy(makefiles, NOFREE); 1058 Lst_Destroy(create, (FreeProc *)free); 1059 #endif 1060 1061 /* print the graph now it's been processed if the user requested it */ 1062 if (DEBUG(GRAPH2)) 1063 Targ_PrintGraph(2); 1064 1065 Trace_Log(MAKEEND, 0); 1066 1067 Suff_End(); 1068 Targ_End(); 1069 Arch_End(); 1070 Var_End(); 1071 Parse_End(); 1072 Dir_End(); 1073 Job_End(); 1074 Trace_End(); 1075 1076 if (queryFlag && outOfDate) 1077 return(1); 1078 else 1079 return(0); 1080 } 1081 1082 /*- 1083 * ReadMakefile -- 1084 * Open and parse the given makefile. 1085 * 1086 * Results: 1087 * 0 if ok. -1 if couldn't open file. 1088 * 1089 * Side Effects: 1090 * lots 1091 */ 1092 static int 1093 ReadMakefile(ClientData p, ClientData q __unused) 1094 { 1095 char *fname = p; /* makefile to read */ 1096 FILE *stream; 1097 size_t len = MAXPATHLEN; 1098 char *name, *path = emalloc(len); 1099 int setMAKEFILE; 1100 1101 if (!strcmp(fname, "-")) { 1102 Parse_File("(stdin)", stdin); 1103 Var_Set("MAKEFILE", "", VAR_GLOBAL, 0); 1104 } else { 1105 setMAKEFILE = strcmp(fname, ".depend"); 1106 1107 /* if we've chdir'd, rebuild the path name */ 1108 if (strcmp(curdir, objdir) && *fname != '/') { 1109 size_t plen = strlen(curdir) + strlen(fname) + 2; 1110 if (len < plen) 1111 path = erealloc(path, len = 2 * plen); 1112 1113 (void)snprintf(path, len, "%s/%s", curdir, fname); 1114 if ((stream = fopen(path, "r")) != NULL) { 1115 fname = path; 1116 goto found; 1117 } 1118 1119 /* If curdir failed, try objdir (ala .depend) */ 1120 plen = strlen(objdir) + strlen(fname) + 2; 1121 if (len < plen) 1122 path = erealloc(path, len = 2 * plen); 1123 (void)snprintf(path, len, "%s/%s", objdir, fname); 1124 if ((stream = fopen(path, "r")) != NULL) { 1125 fname = path; 1126 goto found; 1127 } 1128 } else if ((stream = fopen(fname, "r")) != NULL) 1129 goto found; 1130 /* look in -I and system include directories. */ 1131 name = Dir_FindFile(fname, parseIncPath); 1132 if (!name) 1133 name = Dir_FindFile(fname, 1134 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath); 1135 if (!name || (stream = fopen(name, "r")) == NULL) { 1136 if (name) 1137 free(name); 1138 free(path); 1139 return(-1); 1140 } 1141 fname = name; 1142 /* 1143 * set the MAKEFILE variable desired by System V fans -- the 1144 * placement of the setting here means it gets set to the last 1145 * makefile specified, as it is set by SysV make. 1146 */ 1147 found: 1148 if (setMAKEFILE) 1149 Var_Set("MAKEFILE", fname, VAR_GLOBAL, 0); 1150 Parse_File(fname, stream); 1151 (void)fclose(stream); 1152 } 1153 free(path); 1154 return(0); 1155 } 1156 1157 1158 /* 1159 * If MAKEOBJDIRPREFIX is in use, make ends up not in .CURDIR 1160 * in situations that would not arrise with ./obj (links or not). 1161 * This tends to break things like: 1162 * 1163 * build: 1164 * ${MAKE} includes 1165 * 1166 * This function spots when ${.MAKE:T} or ${.MAKE} is a command (as 1167 * opposed to an argument) in a command line and if so returns 1168 * ${.CURDIR} so caller can chdir() so that the assumptions made by 1169 * the Makefile hold true. 1170 * 1171 * If ${.MAKE} does not contain any '/', then ${.MAKE:T} is skipped. 1172 * 1173 * The chdir() only happens in the child process, and does nothing if 1174 * MAKEOBJDIRPREFIX and MAKEOBJDIR are not in the environment so it 1175 * should not break anything. Also if NOCHECKMAKECHDIR is set we 1176 * do nothing - to ensure historic semantics can be retained. 1177 */ 1178 static int Check_Cwd_Off = 0; 1179 1180 static char * 1181 Check_Cwd_av(int ac, char **av, int copy) 1182 { 1183 static char *make[4]; 1184 static char *cur_dir = NULL; 1185 char **mp; 1186 char *cp; 1187 int is_cmd, next_cmd; 1188 int i; 1189 int n; 1190 1191 if (Check_Cwd_Off) 1192 return NULL; 1193 1194 if (make[0] == NULL) { 1195 if (Var_Exists("NOCHECKMAKECHDIR", VAR_GLOBAL)) { 1196 Check_Cwd_Off = 1; 1197 return NULL; 1198 } 1199 1200 make[1] = Var_Value(".MAKE", VAR_GLOBAL, &cp); 1201 if ((make[0] = strrchr(make[1], '/')) == NULL) { 1202 make[0] = make[1]; 1203 make[1] = NULL; 1204 } else 1205 ++make[0]; 1206 make[2] = NULL; 1207 cur_dir = Var_Value(".CURDIR", VAR_GLOBAL, &cp); 1208 } 1209 if (ac == 0 || av == NULL) 1210 return NULL; /* initialization only */ 1211 1212 if (getenv("MAKEOBJDIR") == NULL && 1213 getenv("MAKEOBJDIRPREFIX") == NULL) 1214 return NULL; 1215 1216 1217 next_cmd = 1; 1218 for (i = 0; i < ac; ++i) { 1219 is_cmd = next_cmd; 1220 1221 n = strlen(av[i]); 1222 cp = &(av[i])[n - 1]; 1223 if (strspn(av[i], "|&;") == (size_t)n) { 1224 next_cmd = 1; 1225 continue; 1226 } else if (*cp == ';' || *cp == '&' || *cp == '|' || *cp == ')') { 1227 next_cmd = 1; 1228 if (copy) { 1229 do { 1230 *cp-- = '\0'; 1231 } while (*cp == ';' || *cp == '&' || *cp == '|' || 1232 *cp == ')' || *cp == '}') ; 1233 } else { 1234 /* 1235 * XXX this should not happen. 1236 */ 1237 fprintf(stderr, "WARNING: raw arg ends in shell meta '%s'\n", 1238 av[i]); 1239 } 1240 } else 1241 next_cmd = 0; 1242 1243 cp = av[i]; 1244 if (*cp == ';' || *cp == '&' || *cp == '|') 1245 is_cmd = 1; 1246 1247 #ifdef check_cwd_debug 1248 fprintf(stderr, "av[%d] == %s '%s'", 1249 i, (is_cmd) ? "cmd" : "arg", av[i]); 1250 #endif 1251 if (is_cmd != 0) { 1252 if (*cp == '(' || *cp == '{' || 1253 *cp == ';' || *cp == '&' || *cp == '|') { 1254 do { 1255 ++cp; 1256 } while (*cp == '(' || *cp == '{' || 1257 *cp == ';' || *cp == '&' || *cp == '|'); 1258 if (*cp == '\0') { 1259 next_cmd = 1; 1260 continue; 1261 } 1262 } 1263 if (strcmp(cp, "cd") == 0 || strcmp(cp, "chdir") == 0) { 1264 #ifdef check_cwd_debug 1265 fprintf(stderr, " == cd, done.\n"); 1266 #endif 1267 return NULL; 1268 } 1269 for (mp = make; *mp != NULL; ++mp) { 1270 n = strlen(*mp); 1271 if (strcmp(cp, *mp) == 0) { 1272 #ifdef check_cwd_debug 1273 fprintf(stderr, " %s == '%s', chdir(%s)\n", 1274 cp, *mp, cur_dir); 1275 #endif 1276 return cur_dir; 1277 } 1278 } 1279 } 1280 #ifdef check_cwd_debug 1281 fprintf(stderr, "\n"); 1282 #endif 1283 } 1284 return NULL; 1285 } 1286 1287 char * 1288 Check_Cwd_Cmd(const char *cmd) 1289 { 1290 char *cp, *bp; 1291 char **av; 1292 int ac; 1293 1294 if (Check_Cwd_Off) 1295 return NULL; 1296 1297 if (cmd) { 1298 av = brk_string(cmd, &ac, TRUE, &bp); 1299 #ifdef check_cwd_debug 1300 fprintf(stderr, "splitting: '%s' -> %d words\n", 1301 cmd, ac); 1302 #endif 1303 } else { 1304 ac = 0; 1305 av = NULL; 1306 bp = NULL; 1307 } 1308 cp = Check_Cwd_av(ac, av, 1); 1309 if (bp) 1310 free(bp); 1311 if (av) 1312 free(av); 1313 return cp; 1314 } 1315 1316 void 1317 Check_Cwd(const char **argv) 1318 { 1319 char *cp; 1320 int ac; 1321 1322 if (Check_Cwd_Off) 1323 return; 1324 1325 for (ac = 0; argv[ac] != NULL; ++ac) 1326 /* NOTHING */; 1327 if (ac == 3 && *argv[1] == '-') { 1328 cp = Check_Cwd_Cmd(argv[2]); 1329 } else { 1330 cp = Check_Cwd_av(ac, UNCONST(argv), 0); 1331 } 1332 if (cp) { 1333 chdir(cp); 1334 } 1335 } 1336 1337 /*- 1338 * Cmd_Exec -- 1339 * Execute the command in cmd, and return the output of that command 1340 * in a string. 1341 * 1342 * Results: 1343 * A string containing the output of the command, or the empty string 1344 * If errnum is not NULL, it contains the reason for the command failure 1345 * 1346 * Side Effects: 1347 * The string must be freed by the caller. 1348 */ 1349 char * 1350 Cmd_Exec(const char *cmd, const char **errnum) 1351 { 1352 const char *args[4]; /* Args for invoking the shell */ 1353 int fds[2]; /* Pipe streams */ 1354 int cpid; /* Child PID */ 1355 int pid; /* PID from wait() */ 1356 char *res; /* result */ 1357 int status; /* command exit status */ 1358 Buffer buf; /* buffer to store the result */ 1359 char *cp; 1360 int cc; 1361 1362 1363 *errnum = NULL; 1364 1365 if (!shellName) 1366 Shell_Init(); 1367 /* 1368 * Set up arguments for shell 1369 */ 1370 args[0] = shellName; 1371 args[1] = "-c"; 1372 args[2] = cmd; 1373 args[3] = NULL; 1374 1375 /* 1376 * Open a pipe for fetching its output 1377 */ 1378 if (pipe(fds) == -1) { 1379 *errnum = "Couldn't create pipe for \"%s\""; 1380 goto bad; 1381 } 1382 1383 /* 1384 * Fork 1385 */ 1386 switch (cpid = vfork()) { 1387 case 0: 1388 /* 1389 * Close input side of pipe 1390 */ 1391 (void)close(fds[0]); 1392 1393 /* 1394 * Duplicate the output stream to the shell's output, then 1395 * shut the extra thing down. Note we don't fetch the error 1396 * stream...why not? Why? 1397 */ 1398 (void)dup2(fds[1], 1); 1399 (void)close(fds[1]); 1400 1401 (void)execv(shellPath, UNCONST(args)); 1402 _exit(1); 1403 /*NOTREACHED*/ 1404 1405 case -1: 1406 *errnum = "Couldn't exec \"%s\""; 1407 goto bad; 1408 1409 default: 1410 /* 1411 * No need for the writing half 1412 */ 1413 (void)close(fds[1]); 1414 1415 buf = Buf_Init(MAKE_BSIZE); 1416 1417 do { 1418 char result[BUFSIZ]; 1419 cc = read(fds[0], result, sizeof(result)); 1420 if (cc > 0) 1421 Buf_AddBytes(buf, cc, (Byte *)result); 1422 } 1423 while (cc > 0 || (cc == -1 && errno == EINTR)); 1424 1425 /* 1426 * Close the input side of the pipe. 1427 */ 1428 (void)close(fds[0]); 1429 1430 /* 1431 * Wait for the process to exit. 1432 */ 1433 while(((pid = wait(&status)) != cpid) && (pid >= 0)) 1434 continue; 1435 1436 res = (char *)Buf_GetAll(buf, &cc); 1437 Buf_Destroy(buf, FALSE); 1438 1439 if (cc == 0) 1440 *errnum = "Couldn't read shell's output for \"%s\""; 1441 1442 if (status) 1443 *errnum = "\"%s\" returned non-zero status"; 1444 1445 /* 1446 * Null-terminate the result, convert newlines to spaces and 1447 * install it in the variable. 1448 */ 1449 res[cc] = '\0'; 1450 cp = &res[cc]; 1451 1452 if (cc > 0 && *--cp == '\n') { 1453 /* 1454 * A final newline is just stripped 1455 */ 1456 *cp-- = '\0'; 1457 } 1458 while (cp >= res) { 1459 if (*cp == '\n') { 1460 *cp = ' '; 1461 } 1462 cp--; 1463 } 1464 break; 1465 } 1466 return res; 1467 bad: 1468 res = emalloc(1); 1469 *res = '\0'; 1470 return res; 1471 } 1472 1473 /*- 1474 * Error -- 1475 * Print an error message given its format. 1476 * 1477 * Results: 1478 * None. 1479 * 1480 * Side Effects: 1481 * The message is printed. 1482 */ 1483 /* VARARGS */ 1484 void 1485 Error(const char *fmt, ...) 1486 { 1487 va_list ap; 1488 1489 va_start(ap, fmt); 1490 fprintf(stderr, "%s: ", progname); 1491 (void)vfprintf(stderr, fmt, ap); 1492 va_end(ap); 1493 (void)fprintf(stderr, "\n"); 1494 (void)fflush(stderr); 1495 } 1496 1497 /*- 1498 * Fatal -- 1499 * Produce a Fatal error message. If jobs are running, waits for them 1500 * to finish. 1501 * 1502 * Results: 1503 * None 1504 * 1505 * Side Effects: 1506 * The program exits 1507 */ 1508 /* VARARGS */ 1509 void 1510 Fatal(const char *fmt, ...) 1511 { 1512 va_list ap; 1513 1514 va_start(ap, fmt); 1515 if (jobsRunning) 1516 Job_Wait(); 1517 1518 (void)vfprintf(stderr, fmt, ap); 1519 va_end(ap); 1520 (void)fprintf(stderr, "\n"); 1521 (void)fflush(stderr); 1522 1523 PrintOnError(NULL); 1524 1525 if (DEBUG(GRAPH2) || DEBUG(GRAPH3)) 1526 Targ_PrintGraph(2); 1527 Trace_Log(MAKEERROR, 0); 1528 exit(2); /* Not 1 so -q can distinguish error */ 1529 } 1530 1531 /* 1532 * Punt -- 1533 * Major exception once jobs are being created. Kills all jobs, prints 1534 * a message and exits. 1535 * 1536 * Results: 1537 * None 1538 * 1539 * Side Effects: 1540 * All children are killed indiscriminately and the program Lib_Exits 1541 */ 1542 /* VARARGS */ 1543 void 1544 Punt(const char *fmt, ...) 1545 { 1546 va_list ap; 1547 1548 va_start(ap, fmt); 1549 (void)fprintf(stderr, "%s: ", progname); 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 DieHorribly(); 1558 } 1559 1560 /*- 1561 * DieHorribly -- 1562 * Exit without giving a message. 1563 * 1564 * Results: 1565 * None 1566 * 1567 * Side Effects: 1568 * A big one... 1569 */ 1570 void 1571 DieHorribly(void) 1572 { 1573 if (jobsRunning) 1574 Job_AbortAll(); 1575 if (DEBUG(GRAPH2)) 1576 Targ_PrintGraph(2); 1577 Trace_Log(MAKEERROR, 0); 1578 exit(2); /* Not 1, so -q can distinguish error */ 1579 } 1580 1581 /* 1582 * Finish -- 1583 * Called when aborting due to errors in child shell to signal 1584 * abnormal exit. 1585 * 1586 * Results: 1587 * None 1588 * 1589 * Side Effects: 1590 * The program exits 1591 */ 1592 void 1593 Finish(int errors) 1594 /* number of errors encountered in Make_Make */ 1595 { 1596 Fatal("%d error%s", errors, errors == 1 ? "" : "s"); 1597 } 1598 1599 #ifndef MAKE_NATIVE 1600 /* 1601 * emalloc -- 1602 * malloc, but die on error. 1603 */ 1604 void * 1605 emalloc(size_t len) 1606 { 1607 void *p; 1608 1609 if ((p = malloc(len)) == NULL) 1610 enomem(); 1611 return(p); 1612 } 1613 1614 /* 1615 * estrdup -- 1616 * strdup, but die on error. 1617 */ 1618 char * 1619 estrdup(const char *str) 1620 { 1621 char *p; 1622 1623 if ((p = strdup(str)) == NULL) 1624 enomem(); 1625 return(p); 1626 } 1627 1628 /* 1629 * erealloc -- 1630 * realloc, but die on error. 1631 */ 1632 void * 1633 erealloc(void *ptr, size_t size) 1634 { 1635 if ((ptr = realloc(ptr, size)) == NULL) 1636 enomem(); 1637 return(ptr); 1638 } 1639 1640 /* 1641 * enomem -- 1642 * die when out of memory. 1643 */ 1644 void 1645 enomem(void) 1646 { 1647 (void)fprintf(stderr, "%s: %s.\n", progname, strerror(errno)); 1648 exit(2); 1649 } 1650 #endif 1651 1652 /* 1653 * enunlink -- 1654 * Remove a file carefully, avoiding directories. 1655 */ 1656 int 1657 eunlink(const char *file) 1658 { 1659 struct stat st; 1660 1661 if (lstat(file, &st) == -1) 1662 return -1; 1663 1664 if (S_ISDIR(st.st_mode)) { 1665 errno = EISDIR; 1666 return -1; 1667 } 1668 return unlink(file); 1669 } 1670 1671 /* 1672 * execError -- 1673 * Print why exec failed, avoiding stdio. 1674 */ 1675 void 1676 execError(const char *af, const char *av) 1677 { 1678 #ifdef USE_IOVEC 1679 int i = 0; 1680 struct iovec iov[8]; 1681 #define IOADD(s) \ 1682 (void)(iov[i].iov_base = UNCONST(s), \ 1683 iov[i].iov_len = strlen(iov[i].iov_base), \ 1684 i++) 1685 #else 1686 #define IOADD(void)write(2, s, strlen(s)) 1687 #endif 1688 1689 IOADD(progname); 1690 IOADD(": "); 1691 IOADD(af); 1692 IOADD("("); 1693 IOADD(av); 1694 IOADD(") failed ("); 1695 IOADD(strerror(errno)); 1696 IOADD(")\n"); 1697 1698 #ifdef USE_IOVEC 1699 (void)writev(2, iov, 8); 1700 #endif 1701 } 1702 1703 /* 1704 * usage -- 1705 * exit with usage message 1706 */ 1707 static void 1708 usage(void) 1709 { 1710 (void)fprintf(stderr, 1711 "usage: %s [-BeikNnqrstWX] [-D variable] [-d flags] [-f makefile]\n\ 1712 [-I directory] [-J private] [-j max_jobs] [-m directory] [-T file]\n\ 1713 [-V variable] [variable=value] [target ...]\n", progname); 1714 exit(2); 1715 } 1716 1717 1718 int 1719 PrintAddr(ClientData a, ClientData b) 1720 { 1721 printf("%lx ", (unsigned long) a); 1722 return b ? 0 : 0; 1723 } 1724 1725 1726 1727 void 1728 PrintOnError(const char *s) 1729 { 1730 char tmp[64]; 1731 char *cp; 1732 1733 if (s) 1734 printf("%s", s); 1735 1736 printf("\n%s: stopped in %s\n", progname, curdir); 1737 strncpy(tmp, "${MAKE_PRINT_VAR_ON_ERROR:@v@$v='${$v}'\n@}", 1738 sizeof(tmp) - 1); 1739 cp = Var_Subst(NULL, tmp, VAR_GLOBAL, 0); 1740 if (cp) { 1741 if (*cp) 1742 printf("%s", cp); 1743 free(cp); 1744 } 1745 } 1746 1747 void 1748 Main_ExportMAKEFLAGS(Boolean first) 1749 { 1750 static int once = 1; 1751 char tmp[64]; 1752 char *s; 1753 1754 if (once != first) 1755 return; 1756 once = 0; 1757 1758 strncpy(tmp, "${.MAKEFLAGS} ${.MAKEOVERRIDES:O:u:@v@$v=${$v:Q}@}", 1759 sizeof(tmp)); 1760 s = Var_Subst(NULL, tmp, VAR_CMD, 0); 1761 if (s && *s) { 1762 #ifdef POSIX 1763 setenv("MAKEFLAGS", s, 1); 1764 #else 1765 setenv("MAKE", s, 1); 1766 #endif 1767 } 1768 } 1769