main.c revision 1.567
1 /* $NetBSD: main.c,v 1.567 2022/01/07 21:00:49 rillig 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 /* 72 * The main file for this entire program. Exit routines etc. reside here. 73 * 74 * Utility functions defined in this file: 75 * 76 * Main_ParseArgLine 77 * Parse and process command line arguments from a 78 * single string. Used to implement the special targets 79 * .MFLAGS and .MAKEFLAGS. 80 * 81 * Error Print a tagged error message. 82 * 83 * Fatal Print an error message and exit. 84 * 85 * Punt Abort all jobs and exit with a message. 86 * 87 * Finish Finish things up by printing the number of errors 88 * that occurred, and exit. 89 */ 90 91 #include <sys/types.h> 92 #include <sys/time.h> 93 #include <sys/param.h> 94 #include <sys/resource.h> 95 #include <sys/stat.h> 96 #ifdef MAKE_NATIVE 97 #include <sys/sysctl.h> 98 #endif 99 #include <sys/utsname.h> 100 #include <sys/wait.h> 101 102 #include <errno.h> 103 #include <signal.h> 104 #include <stdarg.h> 105 #include <time.h> 106 107 #include "make.h" 108 #include "dir.h" 109 #include "job.h" 110 #include "pathnames.h" 111 #include "trace.h" 112 113 /* "@(#)main.c 8.3 (Berkeley) 3/19/94" */ 114 MAKE_RCSID("$NetBSD: main.c,v 1.567 2022/01/07 21:00:49 rillig Exp $"); 115 #if defined(MAKE_NATIVE) && !defined(lint) 116 __COPYRIGHT("@(#) Copyright (c) 1988, 1989, 1990, 1993 " 117 "The Regents of the University of California. " 118 "All rights reserved."); 119 #endif 120 121 CmdOpts opts; 122 time_t now; /* Time at start of make */ 123 GNode *defaultNode; /* .DEFAULT node */ 124 bool allPrecious; /* .PRECIOUS given on line by itself */ 125 bool deleteOnError; /* .DELETE_ON_ERROR: set */ 126 127 static int maxJobTokens; /* -j argument */ 128 bool enterFlagObj; /* -w and objdir != srcdir */ 129 130 static int jp_0 = -1, jp_1 = -1; /* ends of parent job pipe */ 131 bool doing_depend; /* Set while reading .depend */ 132 static bool jobsRunning; /* true if the jobs might be running */ 133 static const char *tracefile; 134 static bool ReadMakefile(const char *); 135 static void purge_relative_cached_realpaths(void); 136 137 static bool ignorePWD; /* if we use -C, PWD is meaningless */ 138 static char objdir[MAXPATHLEN + 1]; /* where we chdir'ed to */ 139 char curdir[MAXPATHLEN + 1]; /* Startup directory */ 140 const char *progname; 141 char *makeDependfile; 142 pid_t myPid; 143 int makelevel; 144 145 bool forceJobs = false; 146 static int main_errors = 0; 147 static HashTable cached_realpaths; 148 149 /* 150 * For compatibility with the POSIX version of MAKEFLAGS that includes 151 * all the options without '-', convert 'flags' to '-f -l -a -g -s'. 152 */ 153 static char * 154 explode(const char *flags) 155 { 156 char *exploded, *ep; 157 const char *p; 158 159 if (flags == NULL) 160 return NULL; 161 162 for (p = flags; *p != '\0'; p++) 163 if (!ch_isalpha(*p)) 164 return bmake_strdup(flags); 165 166 exploded = bmake_malloc((size_t)(p - flags) * 3 + 1); 167 for (p = flags, ep = exploded; *p != '\0'; p++) { 168 *ep++ = '-'; 169 *ep++ = *p; 170 *ep++ = ' '; 171 } 172 *ep = '\0'; 173 return exploded; 174 } 175 176 MAKE_ATTR_DEAD static void 177 usage(void) 178 { 179 size_t prognameLen = strcspn(progname, "["); 180 181 (void)fprintf(stderr, 182 "usage: %.*s [-BeikNnqrSstWwX]\n" 183 " [-C directory] [-D variable] [-d flags] [-f makefile]\n" 184 " [-I directory] [-J private] [-j max_jobs] [-m directory] [-T file]\n" 185 " [-V variable] [-v variable] [variable=value] [target ...]\n", 186 (int)prognameLen, progname); 187 exit(2); 188 } 189 190 static void 191 MainParseArgDebugFile(const char *arg) 192 { 193 const char *mode; 194 size_t len; 195 char *fname; 196 197 if (opts.debug_file != stdout && opts.debug_file != stderr) 198 fclose(opts.debug_file); 199 200 if (*arg == '+') { 201 arg++; 202 mode = "a"; 203 } else 204 mode = "w"; 205 206 if (strcmp(arg, "stdout") == 0) { 207 opts.debug_file = stdout; 208 return; 209 } 210 if (strcmp(arg, "stderr") == 0) { 211 opts.debug_file = stderr; 212 return; 213 } 214 215 len = strlen(arg); 216 fname = bmake_malloc(len + 20); 217 memcpy(fname, arg, len + 1); 218 219 /* Replace the trailing '%d' after '.%d' with the pid. */ 220 if (len >= 3 && memcmp(fname + len - 3, ".%d", 3) == 0) 221 snprintf(fname + len - 2, 20, "%d", getpid()); 222 223 opts.debug_file = fopen(fname, mode); 224 if (opts.debug_file == NULL) { 225 fprintf(stderr, "Cannot open debug file \"%s\"\n", 226 fname); 227 exit(2); 228 } 229 free(fname); 230 } 231 232 static void 233 MainParseArgDebug(const char *argvalue) 234 { 235 const char *modules; 236 DebugFlags debug = opts.debug; 237 238 for (modules = argvalue; *modules != '\0'; modules++) { 239 switch (*modules) { 240 case '0': /* undocumented, only intended for tests */ 241 memset(&debug, 0, sizeof(debug)); 242 break; 243 case 'A': 244 memset(&debug, ~0, sizeof(debug)); 245 break; 246 case 'a': 247 debug.DEBUG_ARCH = true; 248 break; 249 case 'C': 250 debug.DEBUG_CWD = true; 251 break; 252 case 'c': 253 debug.DEBUG_COND = true; 254 break; 255 case 'd': 256 debug.DEBUG_DIR = true; 257 break; 258 case 'e': 259 debug.DEBUG_ERROR = true; 260 break; 261 case 'f': 262 debug.DEBUG_FOR = true; 263 break; 264 case 'g': 265 if (modules[1] == '1') { 266 debug.DEBUG_GRAPH1 = true; 267 modules++; 268 } else if (modules[1] == '2') { 269 debug.DEBUG_GRAPH2 = true; 270 modules++; 271 } else if (modules[1] == '3') { 272 debug.DEBUG_GRAPH3 = true; 273 modules++; 274 } 275 break; 276 case 'h': 277 debug.DEBUG_HASH = true; 278 break; 279 case 'j': 280 debug.DEBUG_JOB = true; 281 break; 282 case 'L': 283 opts.strict = true; 284 break; 285 case 'l': 286 debug.DEBUG_LOUD = true; 287 break; 288 case 'M': 289 debug.DEBUG_META = true; 290 break; 291 case 'm': 292 debug.DEBUG_MAKE = true; 293 break; 294 case 'n': 295 debug.DEBUG_SCRIPT = true; 296 break; 297 case 'p': 298 debug.DEBUG_PARSE = true; 299 break; 300 case 's': 301 debug.DEBUG_SUFF = true; 302 break; 303 case 't': 304 debug.DEBUG_TARG = true; 305 break; 306 case 'V': 307 opts.debugVflag = true; 308 break; 309 case 'v': 310 debug.DEBUG_VAR = true; 311 break; 312 case 'x': 313 debug.DEBUG_SHELL = true; 314 break; 315 case 'F': 316 MainParseArgDebugFile(modules + 1); 317 goto debug_setbuf; 318 default: 319 (void)fprintf(stderr, 320 "%s: illegal argument to d option -- %c\n", 321 progname, *modules); 322 usage(); 323 } 324 } 325 326 debug_setbuf: 327 opts.debug = debug; 328 329 /* 330 * Make the debug_file unbuffered, and make 331 * stdout line buffered (unless debugfile == stdout). 332 */ 333 setvbuf(opts.debug_file, NULL, _IONBF, 0); 334 if (opts.debug_file != stdout) { 335 setvbuf(stdout, NULL, _IOLBF, 0); 336 } 337 } 338 339 /* Is path relative, or does it contain any relative component "." or ".."? */ 340 static bool 341 IsRelativePath(const char *path) 342 { 343 const char *p; 344 345 if (path[0] != '/') 346 return true; 347 p = path; 348 while ((p = strstr(p, "/.")) != NULL) { 349 p += 2; 350 if (*p == '.') 351 p++; 352 if (*p == '/' || *p == '\0') 353 return true; 354 } 355 return false; 356 } 357 358 static void 359 MainParseArgChdir(const char *argvalue) 360 { 361 struct stat sa, sb; 362 363 if (chdir(argvalue) == -1) { 364 (void)fprintf(stderr, "%s: chdir %s: %s\n", 365 progname, argvalue, strerror(errno)); 366 exit(2); /* Not 1 so -q can distinguish error */ 367 } 368 if (getcwd(curdir, MAXPATHLEN) == NULL) { 369 (void)fprintf(stderr, "%s: %s.\n", progname, strerror(errno)); 370 exit(2); 371 } 372 if (!IsRelativePath(argvalue) && 373 stat(argvalue, &sa) != -1 && 374 stat(curdir, &sb) != -1 && 375 sa.st_ino == sb.st_ino && 376 sa.st_dev == sb.st_dev) 377 strncpy(curdir, argvalue, MAXPATHLEN); 378 ignorePWD = true; 379 } 380 381 static void 382 MainParseArgJobsInternal(const char *argvalue) 383 { 384 char end; 385 if (sscanf(argvalue, "%d,%d%c", &jp_0, &jp_1, &end) != 2) { 386 (void)fprintf(stderr, 387 "%s: internal error -- J option malformed (%s)\n", 388 progname, argvalue); 389 usage(); 390 } 391 if ((fcntl(jp_0, F_GETFD, 0) < 0) || 392 (fcntl(jp_1, F_GETFD, 0) < 0)) { 393 jp_0 = -1; 394 jp_1 = -1; 395 opts.compatMake = true; 396 } else { 397 Global_Append(MAKEFLAGS, "-J"); 398 Global_Append(MAKEFLAGS, argvalue); 399 } 400 } 401 402 static void 403 MainParseArgJobs(const char *argvalue) 404 { 405 char *p; 406 407 forceJobs = true; 408 opts.maxJobs = (int)strtol(argvalue, &p, 0); 409 if (*p != '\0' || opts.maxJobs < 1) { 410 (void)fprintf(stderr, 411 "%s: illegal argument to -j -- must be positive integer!\n", 412 progname); 413 exit(2); /* Not 1 so -q can distinguish error */ 414 } 415 Global_Append(MAKEFLAGS, "-j"); 416 Global_Append(MAKEFLAGS, argvalue); 417 Global_Set(".MAKE.JOBS", argvalue); 418 maxJobTokens = opts.maxJobs; 419 } 420 421 static void 422 MainParseArgSysInc(const char *argvalue) 423 { 424 /* look for magic parent directory search string */ 425 if (strncmp(".../", argvalue, 4) == 0) { 426 char *found_path = Dir_FindHereOrAbove(curdir, argvalue + 4); 427 if (found_path == NULL) 428 return; 429 (void)SearchPath_Add(sysIncPath, found_path); 430 free(found_path); 431 } else { 432 (void)SearchPath_Add(sysIncPath, argvalue); 433 } 434 Global_Append(MAKEFLAGS, "-m"); 435 Global_Append(MAKEFLAGS, argvalue); 436 } 437 438 static bool 439 MainParseArg(char c, const char *argvalue) 440 { 441 switch (c) { 442 case '\0': 443 break; 444 case 'B': 445 opts.compatMake = true; 446 Global_Append(MAKEFLAGS, "-B"); 447 Global_Set(MAKE_MODE, "compat"); 448 break; 449 case 'C': 450 MainParseArgChdir(argvalue); 451 break; 452 case 'D': 453 if (argvalue[0] == '\0') 454 return false; 455 Global_SetExpand(argvalue, "1"); 456 Global_Append(MAKEFLAGS, "-D"); 457 Global_Append(MAKEFLAGS, argvalue); 458 break; 459 case 'I': 460 Parse_AddIncludeDir(argvalue); 461 Global_Append(MAKEFLAGS, "-I"); 462 Global_Append(MAKEFLAGS, argvalue); 463 break; 464 case 'J': 465 MainParseArgJobsInternal(argvalue); 466 break; 467 case 'N': 468 opts.noExecute = true; 469 opts.noRecursiveExecute = true; 470 Global_Append(MAKEFLAGS, "-N"); 471 break; 472 case 'S': 473 opts.keepgoing = false; 474 Global_Append(MAKEFLAGS, "-S"); 475 break; 476 case 'T': 477 tracefile = bmake_strdup(argvalue); 478 Global_Append(MAKEFLAGS, "-T"); 479 Global_Append(MAKEFLAGS, argvalue); 480 break; 481 case 'V': 482 case 'v': 483 opts.printVars = c == 'v' ? PVM_EXPANDED : PVM_UNEXPANDED; 484 Lst_Append(&opts.variables, bmake_strdup(argvalue)); 485 /* XXX: Why always -V? */ 486 Global_Append(MAKEFLAGS, "-V"); 487 Global_Append(MAKEFLAGS, argvalue); 488 break; 489 case 'W': 490 opts.parseWarnFatal = true; 491 /* XXX: why no Global_Append? */ 492 break; 493 case 'X': 494 opts.varNoExportEnv = true; 495 Global_Append(MAKEFLAGS, "-X"); 496 break; 497 case 'd': 498 /* If '-d-opts' don't pass to children */ 499 if (argvalue[0] == '-') 500 argvalue++; 501 else { 502 Global_Append(MAKEFLAGS, "-d"); 503 Global_Append(MAKEFLAGS, argvalue); 504 } 505 MainParseArgDebug(argvalue); 506 break; 507 case 'e': 508 opts.checkEnvFirst = true; 509 Global_Append(MAKEFLAGS, "-e"); 510 break; 511 case 'f': 512 Lst_Append(&opts.makefiles, bmake_strdup(argvalue)); 513 break; 514 case 'i': 515 opts.ignoreErrors = true; 516 Global_Append(MAKEFLAGS, "-i"); 517 break; 518 case 'j': 519 MainParseArgJobs(argvalue); 520 break; 521 case 'k': 522 opts.keepgoing = true; 523 Global_Append(MAKEFLAGS, "-k"); 524 break; 525 case 'm': 526 MainParseArgSysInc(argvalue); 527 /* XXX: why no Var_Append? */ 528 break; 529 case 'n': 530 opts.noExecute = true; 531 Global_Append(MAKEFLAGS, "-n"); 532 break; 533 case 'q': 534 opts.query = true; 535 /* Kind of nonsensical, wot? */ 536 Global_Append(MAKEFLAGS, "-q"); 537 break; 538 case 'r': 539 opts.noBuiltins = true; 540 Global_Append(MAKEFLAGS, "-r"); 541 break; 542 case 's': 543 opts.silent = true; 544 Global_Append(MAKEFLAGS, "-s"); 545 break; 546 case 't': 547 opts.touch = true; 548 Global_Append(MAKEFLAGS, "-t"); 549 break; 550 case 'w': 551 opts.enterFlag = true; 552 Global_Append(MAKEFLAGS, "-w"); 553 break; 554 default: 555 usage(); 556 } 557 return true; 558 } 559 560 /* 561 * Parse the given arguments. Called from main() and from 562 * Main_ParseArgLine() when the .MAKEFLAGS target is used. 563 * 564 * The arguments must be treated as read-only and will be freed after the 565 * call. 566 * 567 * XXX: Deal with command line overriding .MAKEFLAGS in makefile 568 */ 569 static void 570 MainParseArgs(int argc, char **argv) 571 { 572 char c; 573 int arginc; 574 char *argvalue; 575 char *optscan; 576 bool inOption, dashDash = false; 577 578 const char *optspecs = "BC:D:I:J:NST:V:WXd:ef:ij:km:nqrstv:w"; 579 /* Can't actually use getopt(3) because rescanning is not portable */ 580 581 rearg: 582 inOption = false; 583 optscan = NULL; 584 while (argc > 1) { 585 const char *optspec; 586 if (!inOption) 587 optscan = argv[1]; 588 c = *optscan++; 589 arginc = 0; 590 if (inOption) { 591 if (c == '\0') { 592 argv++; 593 argc--; 594 inOption = false; 595 continue; 596 } 597 } else { 598 if (c != '-' || dashDash) 599 break; 600 inOption = true; 601 c = *optscan++; 602 } 603 /* '-' found at some earlier point */ 604 optspec = strchr(optspecs, c); 605 if (c != '\0' && optspec != NULL && optspec[1] == ':') { 606 /* 607 * -<something> found, and <something> should have an 608 * argument 609 */ 610 inOption = false; 611 arginc = 1; 612 argvalue = optscan; 613 if (*argvalue == '\0') { 614 if (argc < 3) 615 goto noarg; 616 argvalue = argv[2]; 617 arginc = 2; 618 } 619 } else { 620 argvalue = NULL; 621 } 622 switch (c) { 623 case '\0': 624 arginc = 1; 625 inOption = false; 626 break; 627 case '-': 628 dashDash = true; 629 break; 630 default: 631 if (!MainParseArg(c, argvalue)) 632 goto noarg; 633 } 634 argv += arginc; 635 argc -= arginc; 636 } 637 638 /* 639 * See if the rest of the arguments are variable assignments and 640 * perform them if so. Else take them to be targets and stuff them 641 * on the end of the "create" list. 642 */ 643 for (; argc > 1; argv++, argc--) { 644 if (!Parse_VarAssign(argv[1], false, SCOPE_CMDLINE)) { 645 if (argv[1][0] == '\0') 646 Punt("illegal (null) argument."); 647 if (argv[1][0] == '-' && !dashDash) 648 goto rearg; 649 Lst_Append(&opts.create, bmake_strdup(argv[1])); 650 } 651 } 652 653 return; 654 noarg: 655 (void)fprintf(stderr, "%s: option requires an argument -- %c\n", 656 progname, c); 657 usage(); 658 } 659 660 /* 661 * Break a line of arguments into words and parse them. 662 * 663 * Used when a .MFLAGS or .MAKEFLAGS target is encountered during parsing and 664 * by main() when reading the MAKEFLAGS environment variable. 665 */ 666 void 667 Main_ParseArgLine(const char *line) 668 { 669 Words words; 670 char *buf; 671 672 if (line == NULL) 673 return; 674 /* XXX: don't use line as an iterator variable */ 675 for (; *line == ' '; line++) 676 continue; 677 if (line[0] == '\0') 678 return; 679 680 { 681 FStr argv0 = Var_Value(SCOPE_GLOBAL, ".MAKE"); 682 buf = str_concat3(argv0.str, " ", line); 683 FStr_Done(&argv0); 684 } 685 686 words = Str_Words(buf, true); 687 if (words.words == NULL) { 688 Error("Unterminated quoted string [%s]", buf); 689 free(buf); 690 return; 691 } 692 free(buf); 693 MainParseArgs((int)words.len, words.words); 694 695 Words_Free(words); 696 } 697 698 bool 699 Main_SetObjdir(bool writable, const char *fmt, ...) 700 { 701 struct stat sb; 702 char *path; 703 char buf[MAXPATHLEN + 1]; 704 char buf2[MAXPATHLEN + 1]; 705 va_list ap; 706 707 va_start(ap, fmt); 708 vsnprintf(path = buf, MAXPATHLEN, fmt, ap); 709 va_end(ap); 710 711 if (path[0] != '/') { 712 snprintf(buf2, MAXPATHLEN, "%s/%s", curdir, path); 713 path = buf2; 714 } 715 716 /* look for the directory and try to chdir there */ 717 if (stat(path, &sb) != 0 || !S_ISDIR(sb.st_mode)) 718 return false; 719 720 if ((writable && access(path, W_OK) != 0) || chdir(path) != 0) { 721 (void)fprintf(stderr, "%s warning: %s: %s.\n", 722 progname, path, strerror(errno)); 723 return false; 724 } 725 726 snprintf(objdir, sizeof objdir, "%s", path); 727 Global_Set(".OBJDIR", objdir); 728 setenv("PWD", objdir, 1); 729 Dir_InitDot(); 730 purge_relative_cached_realpaths(); 731 if (opts.enterFlag && strcmp(objdir, curdir) != 0) 732 enterFlagObj = true; 733 return true; 734 } 735 736 static bool 737 SetVarObjdir(bool writable, const char *var, const char *suffix) 738 { 739 FStr path = Var_Value(SCOPE_CMDLINE, var); 740 741 if (path.str == NULL || path.str[0] == '\0') { 742 FStr_Done(&path); 743 return false; 744 } 745 746 /* expand variable substitutions */ 747 if (strchr(path.str, '$') != 0) { 748 char *expanded; 749 (void)Var_Subst(path.str, SCOPE_GLOBAL, VARE_WANTRES, &expanded); 750 /* TODO: handle errors */ 751 FStr_Done(&path); 752 path = FStr_InitOwn(expanded); 753 } 754 755 (void)Main_SetObjdir(writable, "%s%s", path.str, suffix); 756 757 FStr_Done(&path); 758 return true; 759 } 760 761 /* 762 * Splits str into words, adding them to the list. 763 * The string must be kept alive as long as the list. 764 */ 765 int 766 str2Lst_Append(StringList *lp, char *str) 767 { 768 char *cp; 769 int n; 770 771 const char *sep = " \t"; 772 773 for (n = 0, cp = strtok(str, sep); cp != NULL; cp = strtok(NULL, sep)) { 774 Lst_Append(lp, cp); 775 n++; 776 } 777 return n; 778 } 779 780 #ifdef SIGINFO 781 /*ARGSUSED*/ 782 static void 783 siginfo(int signo MAKE_ATTR_UNUSED) 784 { 785 char dir[MAXPATHLEN]; 786 char str[2 * MAXPATHLEN]; 787 int len; 788 if (getcwd(dir, sizeof dir) == NULL) 789 return; 790 len = snprintf(str, sizeof str, "%s: Working in: %s\n", progname, dir); 791 if (len > 0) 792 (void)write(STDERR_FILENO, str, (size_t)len); 793 } 794 #endif 795 796 /* Allow makefiles some control over the mode we run in. */ 797 static void 798 MakeMode(void) 799 { 800 char *mode; 801 802 (void)Var_Subst("${" MAKE_MODE ":tl}", SCOPE_GLOBAL, VARE_WANTRES, &mode); 803 /* TODO: handle errors */ 804 805 if (mode[0] != '\0') { 806 if (strstr(mode, "compat") != NULL) { 807 opts.compatMake = true; 808 forceJobs = false; 809 } 810 #if USE_META 811 if (strstr(mode, "meta") != NULL) 812 meta_mode_init(mode); 813 #endif 814 } 815 816 free(mode); 817 } 818 819 static void 820 PrintVar(const char *varname, bool expandVars) 821 { 822 if (strchr(varname, '$') != NULL) { 823 char *evalue; 824 (void)Var_Subst(varname, SCOPE_GLOBAL, VARE_WANTRES, &evalue); 825 /* TODO: handle errors */ 826 printf("%s\n", evalue); 827 free(evalue); 828 829 } else if (expandVars) { 830 char *expr = str_concat3("${", varname, "}"); 831 char *evalue; 832 (void)Var_Subst(expr, SCOPE_GLOBAL, VARE_WANTRES, &evalue); 833 /* TODO: handle errors */ 834 free(expr); 835 printf("%s\n", evalue); 836 free(evalue); 837 838 } else { 839 FStr value = Var_Value(SCOPE_GLOBAL, varname); 840 printf("%s\n", value.str != NULL ? value.str : ""); 841 FStr_Done(&value); 842 } 843 } 844 845 /* 846 * Return a bool based on a variable. 847 * 848 * If the knob is not set, return the fallback. 849 * If set, anything that looks or smells like "No", "False", "Off", "0", etc. 850 * is false, otherwise true. 851 */ 852 static bool 853 GetBooleanExpr(const char *expr, bool fallback) 854 { 855 char *value; 856 bool res; 857 858 (void)Var_Subst(expr, SCOPE_GLOBAL, VARE_WANTRES, &value); 859 /* TODO: handle errors */ 860 res = ParseBoolean(value, fallback); 861 free(value); 862 return res; 863 } 864 865 static void 866 doPrintVars(void) 867 { 868 StringListNode *ln; 869 bool expandVars; 870 871 if (opts.printVars == PVM_EXPANDED) 872 expandVars = true; 873 else if (opts.debugVflag) 874 expandVars = false; 875 else 876 expandVars = GetBooleanExpr("${.MAKE.EXPAND_VARIABLES}", 877 false); 878 879 for (ln = opts.variables.first; ln != NULL; ln = ln->next) { 880 const char *varname = ln->datum; 881 PrintVar(varname, expandVars); 882 } 883 } 884 885 static bool 886 runTargets(void) 887 { 888 GNodeList targs = LST_INIT; /* target nodes to create */ 889 bool outOfDate; /* false if all targets up to date */ 890 891 /* 892 * Have now read the entire graph and need to make a list of 893 * targets to create. If none was given on the command line, 894 * we consult the parsing module to find the main target(s) 895 * to create. 896 */ 897 if (Lst_IsEmpty(&opts.create)) 898 Parse_MainName(&targs); 899 else 900 Targ_FindList(&targs, &opts.create); 901 902 if (!opts.compatMake) { 903 /* 904 * Initialize job module before traversing the graph 905 * now that any .BEGIN and .END targets have been read. 906 * This is done only if the -q flag wasn't given 907 * (to prevent the .BEGIN from being executed should 908 * it exist). 909 */ 910 if (!opts.query) { 911 Job_Init(); 912 jobsRunning = true; 913 } 914 915 /* Traverse the graph, checking on all the targets */ 916 outOfDate = Make_Run(&targs); 917 } else { 918 /* 919 * Compat_Init will take care of creating all the 920 * targets as well as initializing the module. 921 */ 922 Compat_Run(&targs); 923 outOfDate = false; 924 } 925 Lst_Done(&targs); /* Don't free the targets themselves. */ 926 return outOfDate; 927 } 928 929 /* 930 * Set up the .TARGETS variable to contain the list of targets to be 931 * created. If none specified, make the variable empty -- the parser 932 * will fill the thing in with the default or .MAIN target. 933 */ 934 static void 935 InitVarTargets(void) 936 { 937 StringListNode *ln; 938 939 if (Lst_IsEmpty(&opts.create)) { 940 Global_Set(".TARGETS", ""); 941 return; 942 } 943 944 for (ln = opts.create.first; ln != NULL; ln = ln->next) { 945 const char *name = ln->datum; 946 Global_Append(".TARGETS", name); 947 } 948 } 949 950 static void 951 InitRandom(void) 952 { 953 struct timeval tv; 954 955 gettimeofday(&tv, NULL); 956 srandom((unsigned int)(tv.tv_sec + tv.tv_usec)); 957 } 958 959 static const char * 960 InitVarMachine(const struct utsname *utsname MAKE_ATTR_UNUSED) 961 { 962 const char *machine = getenv("MACHINE"); 963 if (machine != NULL) 964 return machine; 965 966 #if defined(MAKE_NATIVE) 967 return utsname->machine; 968 #elif defined(MAKE_MACHINE) 969 return MAKE_MACHINE; 970 #else 971 return "unknown"; 972 #endif 973 } 974 975 static const char * 976 InitVarMachineArch(void) 977 { 978 const char *env = getenv("MACHINE_ARCH"); 979 if (env != NULL) 980 return env; 981 982 #ifdef MAKE_NATIVE 983 { 984 struct utsname utsname; 985 static char machine_arch_buf[sizeof utsname.machine]; 986 const int mib[2] = { CTL_HW, HW_MACHINE_ARCH }; 987 size_t len = sizeof machine_arch_buf; 988 989 if (sysctl(mib, (unsigned int)__arraycount(mib), 990 machine_arch_buf, &len, NULL, 0) < 0) { 991 (void)fprintf(stderr, "%s: sysctl failed (%s).\n", 992 progname, strerror(errno)); 993 exit(2); 994 } 995 996 return machine_arch_buf; 997 } 998 #elif defined(MACHINE_ARCH) 999 return MACHINE_ARCH; 1000 #elif defined(MAKE_MACHINE_ARCH) 1001 return MAKE_MACHINE_ARCH; 1002 #else 1003 return "unknown"; 1004 #endif 1005 } 1006 1007 #ifndef NO_PWD_OVERRIDE 1008 /* 1009 * All this code is so that we know where we are when we start up 1010 * on a different machine with pmake. 1011 * 1012 * XXX: Make no longer has "local" and "remote" mode. Is this code still 1013 * necessary? 1014 * 1015 * Overriding getcwd() with $PWD totally breaks MAKEOBJDIRPREFIX 1016 * since the value of curdir can vary depending on how we got 1017 * here. Ie sitting at a shell prompt (shell that provides $PWD) 1018 * or via subdir.mk in which case its likely a shell which does 1019 * not provide it. 1020 * 1021 * So, to stop it breaking this case only, we ignore PWD if 1022 * MAKEOBJDIRPREFIX is set or MAKEOBJDIR contains a variable expression. 1023 */ 1024 static void 1025 HandlePWD(const struct stat *curdir_st) 1026 { 1027 char *pwd; 1028 FStr prefix, makeobjdir; 1029 struct stat pwd_st; 1030 1031 if (ignorePWD || (pwd = getenv("PWD")) == NULL) 1032 return; 1033 1034 prefix = Var_Value(SCOPE_CMDLINE, "MAKEOBJDIRPREFIX"); 1035 if (prefix.str != NULL) { 1036 FStr_Done(&prefix); 1037 return; 1038 } 1039 1040 makeobjdir = Var_Value(SCOPE_CMDLINE, "MAKEOBJDIR"); 1041 if (makeobjdir.str != NULL && strchr(makeobjdir.str, '$') != NULL) 1042 goto ignore_pwd; 1043 1044 if (stat(pwd, &pwd_st) == 0 && 1045 curdir_st->st_ino == pwd_st.st_ino && 1046 curdir_st->st_dev == pwd_st.st_dev) 1047 (void)strncpy(curdir, pwd, MAXPATHLEN); 1048 1049 ignore_pwd: 1050 FStr_Done(&makeobjdir); 1051 } 1052 #endif 1053 1054 /* 1055 * Find the .OBJDIR. If MAKEOBJDIRPREFIX, or failing that, MAKEOBJDIR is set 1056 * in the environment, try only that value and fall back to .CURDIR if it 1057 * does not exist. 1058 * 1059 * Otherwise, try _PATH_OBJDIR.MACHINE-MACHINE_ARCH, _PATH_OBJDIR.MACHINE, 1060 * and finally _PATH_OBJDIRPREFIX`pwd`, in that order. If none of these 1061 * paths exist, just use .CURDIR. 1062 */ 1063 static void 1064 InitObjdir(const char *machine, const char *machine_arch) 1065 { 1066 bool writable; 1067 1068 Dir_InitCur(curdir); 1069 writable = GetBooleanExpr("${MAKE_OBJDIR_CHECK_WRITABLE}", true); 1070 (void)Main_SetObjdir(false, "%s", curdir); 1071 1072 if (!SetVarObjdir(writable, "MAKEOBJDIRPREFIX", curdir) && 1073 !SetVarObjdir(writable, "MAKEOBJDIR", "") && 1074 !Main_SetObjdir(writable, "%s.%s-%s", _PATH_OBJDIR, machine, machine_arch) && 1075 !Main_SetObjdir(writable, "%s.%s", _PATH_OBJDIR, machine) && 1076 !Main_SetObjdir(writable, "%s", _PATH_OBJDIR)) 1077 (void)Main_SetObjdir(writable, "%s%s", _PATH_OBJDIRPREFIX, curdir); 1078 } 1079 1080 /* get rid of resource limit on file descriptors */ 1081 static void 1082 UnlimitFiles(void) 1083 { 1084 #if defined(MAKE_NATIVE) || (defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE)) 1085 struct rlimit rl; 1086 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 && 1087 rl.rlim_cur != rl.rlim_max) { 1088 rl.rlim_cur = rl.rlim_max; 1089 (void)setrlimit(RLIMIT_NOFILE, &rl); 1090 } 1091 #endif 1092 } 1093 1094 static void 1095 CmdOpts_Init(void) 1096 { 1097 opts.compatMake = false; 1098 memset(&opts.debug, 0, sizeof(opts.debug)); 1099 /* opts.debug_file has already been initialized earlier */ 1100 opts.strict = false; 1101 opts.debugVflag = false; 1102 opts.checkEnvFirst = false; 1103 Lst_Init(&opts.makefiles); 1104 opts.ignoreErrors = false; /* Pay attention to non-zero returns */ 1105 opts.maxJobs = 1; 1106 opts.keepgoing = false; /* Stop on error */ 1107 opts.noRecursiveExecute = false; /* Execute all .MAKE targets */ 1108 opts.noExecute = false; /* Execute all commands */ 1109 opts.query = false; 1110 opts.noBuiltins = false; /* Read the built-in rules */ 1111 opts.silent = false; /* Print commands as executed */ 1112 opts.touch = false; 1113 opts.printVars = PVM_NONE; 1114 Lst_Init(&opts.variables); 1115 opts.parseWarnFatal = false; 1116 opts.enterFlag = false; 1117 opts.varNoExportEnv = false; 1118 Lst_Init(&opts.create); 1119 } 1120 1121 /* 1122 * Initialize MAKE and .MAKE to the path of the executable, so that it can be 1123 * found by execvp(3) and the shells, even after a chdir. 1124 * 1125 * If it's a relative path and contains a '/', resolve it to an absolute path. 1126 * Otherwise keep it as is, assuming it will be found in the PATH. 1127 */ 1128 static void 1129 InitVarMake(const char *argv0) 1130 { 1131 const char *make = argv0; 1132 1133 if (argv0[0] != '/' && strchr(argv0, '/') != NULL) { 1134 char pathbuf[MAXPATHLEN]; 1135 const char *abspath = cached_realpath(argv0, pathbuf); 1136 struct stat st; 1137 if (abspath != NULL && abspath[0] == '/' && 1138 stat(make, &st) == 0) 1139 make = abspath; 1140 } 1141 1142 Global_Set("MAKE", make); 1143 Global_Set(".MAKE", make); 1144 } 1145 1146 /* 1147 * Add the directories from the colon-separated syspath to defSysIncPath. 1148 * After returning, the contents of syspath is unspecified. 1149 */ 1150 static void 1151 InitDefSysIncPath(char *syspath) 1152 { 1153 static char defsyspath[] = _PATH_DEFSYSPATH; 1154 char *start, *cp; 1155 1156 /* 1157 * If no user-supplied system path was given (through the -m option) 1158 * add the directories from the DEFSYSPATH (more than one may be given 1159 * as dir1:...:dirn) to the system include path. 1160 */ 1161 if (syspath == NULL || syspath[0] == '\0') 1162 syspath = defsyspath; 1163 else 1164 syspath = bmake_strdup(syspath); 1165 1166 for (start = syspath; *start != '\0'; start = cp) { 1167 for (cp = start; *cp != '\0' && *cp != ':'; cp++) 1168 continue; 1169 if (*cp == ':') 1170 *cp++ = '\0'; 1171 1172 /* look for magic parent directory search string */ 1173 if (strncmp(start, ".../", 4) == 0) { 1174 char *dir = Dir_FindHereOrAbove(curdir, start + 4); 1175 if (dir != NULL) { 1176 (void)SearchPath_Add(defSysIncPath, dir); 1177 free(dir); 1178 } 1179 } else { 1180 (void)SearchPath_Add(defSysIncPath, start); 1181 } 1182 } 1183 1184 if (syspath != defsyspath) 1185 free(syspath); 1186 } 1187 1188 static void 1189 ReadBuiltinRules(void) 1190 { 1191 StringListNode *ln; 1192 StringList sysMkFiles = LST_INIT; 1193 1194 SearchPath_Expand( 1195 Lst_IsEmpty(&sysIncPath->dirs) ? defSysIncPath : sysIncPath, 1196 _PATH_DEFSYSMK, 1197 &sysMkFiles); 1198 if (Lst_IsEmpty(&sysMkFiles)) 1199 Fatal("%s: no system rules (%s).", progname, _PATH_DEFSYSMK); 1200 1201 for (ln = sysMkFiles.first; ln != NULL; ln = ln->next) 1202 if (ReadMakefile(ln->datum)) 1203 break; 1204 1205 if (ln == NULL) 1206 Fatal("%s: cannot open %s.", 1207 progname, (const char *)sysMkFiles.first->datum); 1208 1209 Lst_DoneCall(&sysMkFiles, free); 1210 } 1211 1212 static void 1213 InitMaxJobs(void) 1214 { 1215 char *value; 1216 int n; 1217 1218 if (forceJobs || opts.compatMake || 1219 !Var_Exists(SCOPE_GLOBAL, ".MAKE.JOBS")) 1220 return; 1221 1222 (void)Var_Subst("${.MAKE.JOBS}", SCOPE_GLOBAL, VARE_WANTRES, &value); 1223 /* TODO: handle errors */ 1224 n = (int)strtol(value, NULL, 0); 1225 if (n < 1) { 1226 (void)fprintf(stderr, 1227 "%s: illegal value for .MAKE.JOBS " 1228 "-- must be positive integer!\n", 1229 progname); 1230 exit(2); /* Not 1 so -q can distinguish error */ 1231 } 1232 1233 if (n != opts.maxJobs) { 1234 Global_Append(MAKEFLAGS, "-j"); 1235 Global_Append(MAKEFLAGS, value); 1236 } 1237 1238 opts.maxJobs = n; 1239 maxJobTokens = opts.maxJobs; 1240 forceJobs = true; 1241 free(value); 1242 } 1243 1244 /* 1245 * For compatibility, look at the directories in the VPATH variable 1246 * and add them to the search path, if the variable is defined. The 1247 * variable's value is in the same format as the PATH environment 1248 * variable, i.e. <directory>:<directory>:<directory>... 1249 */ 1250 static void 1251 InitVpath(void) 1252 { 1253 char *vpath, savec, *path; 1254 if (!Var_Exists(SCOPE_CMDLINE, "VPATH")) 1255 return; 1256 1257 (void)Var_Subst("${VPATH}", SCOPE_CMDLINE, VARE_WANTRES, &vpath); 1258 /* TODO: handle errors */ 1259 path = vpath; 1260 do { 1261 char *cp; 1262 /* skip to end of directory */ 1263 for (cp = path; *cp != ':' && *cp != '\0'; cp++) 1264 continue; 1265 /* Save terminator character so know when to stop */ 1266 savec = *cp; 1267 *cp = '\0'; 1268 /* Add directory to search path */ 1269 (void)SearchPath_Add(&dirSearchPath, path); 1270 *cp = savec; 1271 path = cp + 1; 1272 } while (savec == ':'); 1273 free(vpath); 1274 } 1275 1276 static void 1277 ReadAllMakefiles(const StringList *makefiles) 1278 { 1279 StringListNode *ln; 1280 1281 for (ln = makefiles->first; ln != NULL; ln = ln->next) { 1282 const char *fname = ln->datum; 1283 if (!ReadMakefile(fname)) 1284 Fatal("%s: cannot open %s.", progname, fname); 1285 } 1286 } 1287 1288 static void 1289 ReadFirstDefaultMakefile(void) 1290 { 1291 StringList makefiles = LST_INIT; 1292 StringListNode *ln; 1293 char *prefs; 1294 1295 (void)Var_Subst("${" MAKE_MAKEFILE_PREFERENCE "}", 1296 SCOPE_CMDLINE, VARE_WANTRES, &prefs); 1297 /* TODO: handle errors */ 1298 1299 (void)str2Lst_Append(&makefiles, prefs); 1300 1301 for (ln = makefiles.first; ln != NULL; ln = ln->next) 1302 if (ReadMakefile(ln->datum)) 1303 break; 1304 1305 Lst_Done(&makefiles); 1306 free(prefs); 1307 } 1308 1309 /* 1310 * Initialize variables such as MAKE, MACHINE, .MAKEFLAGS. 1311 * Initialize a few modules. 1312 * Parse the arguments from MAKEFLAGS and the command line. 1313 */ 1314 static void 1315 main_Init(int argc, char **argv) 1316 { 1317 struct stat sa; 1318 const char *machine; 1319 const char *machine_arch; 1320 char *syspath = getenv("MAKESYSPATH"); 1321 struct utsname utsname; 1322 1323 /* default to writing debug to stderr */ 1324 opts.debug_file = stderr; 1325 1326 Str_Intern_Init(); 1327 HashTable_Init(&cached_realpaths); 1328 1329 #ifdef SIGINFO 1330 (void)bmake_signal(SIGINFO, siginfo); 1331 #endif 1332 1333 InitRandom(); 1334 1335 progname = str_basename(argv[0]); 1336 1337 UnlimitFiles(); 1338 1339 if (uname(&utsname) == -1) { 1340 (void)fprintf(stderr, "%s: uname failed (%s).\n", progname, 1341 strerror(errno)); 1342 exit(2); 1343 } 1344 1345 /* 1346 * Get the name of this type of MACHINE from utsname 1347 * so we can share an executable for similar machines. 1348 * (i.e. m68k: amiga hp300, mac68k, sun3, ...) 1349 * 1350 * Note that both MACHINE and MACHINE_ARCH are decided at 1351 * run-time. 1352 */ 1353 machine = InitVarMachine(&utsname); 1354 machine_arch = InitVarMachineArch(); 1355 1356 myPid = getpid(); /* remember this for vFork() */ 1357 1358 /* 1359 * Just in case MAKEOBJDIR wants us to do something tricky. 1360 */ 1361 Targ_Init(); 1362 Var_Init(); 1363 Global_Set(".MAKE.OS", utsname.sysname); 1364 Global_Set("MACHINE", machine); 1365 Global_Set("MACHINE_ARCH", machine_arch); 1366 #ifdef MAKE_VERSION 1367 Global_Set("MAKE_VERSION", MAKE_VERSION); 1368 #endif 1369 Global_Set(".newline", "\n"); /* handy for :@ loops */ 1370 #ifndef MAKEFILE_PREFERENCE_LIST 1371 /* This is the traditional preference for makefiles. */ 1372 # define MAKEFILE_PREFERENCE_LIST "makefile Makefile" 1373 #endif 1374 Global_Set(MAKE_MAKEFILE_PREFERENCE, MAKEFILE_PREFERENCE_LIST); 1375 Global_Set(MAKE_DEPENDFILE, ".depend"); 1376 1377 CmdOpts_Init(); 1378 allPrecious = false; /* Remove targets when interrupted */ 1379 deleteOnError = false; /* Historical default behavior */ 1380 jobsRunning = false; 1381 1382 maxJobTokens = opts.maxJobs; 1383 ignorePWD = false; 1384 1385 /* 1386 * Initialize the parsing, directory and variable modules to prepare 1387 * for the reading of inclusion paths and variable settings on the 1388 * command line 1389 */ 1390 1391 /* 1392 * Initialize various variables. 1393 * MAKE also gets this name, for compatibility 1394 * .MAKEFLAGS gets set to the empty string just in case. 1395 * MFLAGS also gets initialized empty, for compatibility. 1396 */ 1397 Parse_Init(); 1398 InitVarMake(argv[0]); 1399 Global_Set(MAKEFLAGS, ""); 1400 Global_Set(MAKEOVERRIDES, ""); 1401 Global_Set("MFLAGS", ""); 1402 Global_Set(".ALLTARGETS", ""); 1403 Var_Set(SCOPE_CMDLINE, MAKE_LEVEL ".ENV", MAKE_LEVEL_ENV); 1404 1405 /* Set some other useful variables. */ 1406 { 1407 char buf[64], *ep = getenv(MAKE_LEVEL_ENV); 1408 1409 makelevel = ep != NULL && ep[0] != '\0' ? atoi(ep) : 0; 1410 if (makelevel < 0) 1411 makelevel = 0; 1412 snprintf(buf, sizeof buf, "%d", makelevel); 1413 Global_Set(MAKE_LEVEL, buf); 1414 snprintf(buf, sizeof buf, "%u", myPid); 1415 Global_Set(".MAKE.PID", buf); 1416 snprintf(buf, sizeof buf, "%u", getppid()); 1417 Global_Set(".MAKE.PPID", buf); 1418 snprintf(buf, sizeof buf, "%u", getuid()); 1419 Global_Set(".MAKE.UID", buf); 1420 snprintf(buf, sizeof buf, "%u", getgid()); 1421 Global_Set(".MAKE.GID", buf); 1422 } 1423 if (makelevel > 0) { 1424 char pn[1024]; 1425 snprintf(pn, sizeof pn, "%s[%d]", progname, makelevel); 1426 progname = bmake_strdup(pn); 1427 } 1428 1429 #ifdef USE_META 1430 meta_init(); 1431 #endif 1432 Dir_Init(); 1433 1434 #ifdef POSIX 1435 { 1436 char *makeflags = explode(getenv("MAKEFLAGS")); 1437 Main_ParseArgLine(makeflags); 1438 free(makeflags); 1439 } 1440 #else 1441 /* 1442 * First snag any flags out of the MAKE environment variable. 1443 * (Note this is *not* MAKEFLAGS since /bin/make uses that and it's 1444 * in a different format). 1445 */ 1446 Main_ParseArgLine(getenv("MAKE")); 1447 #endif 1448 1449 if (getcwd(curdir, MAXPATHLEN) == NULL) { 1450 (void)fprintf(stderr, "%s: getcwd: %s.\n", 1451 progname, strerror(errno)); 1452 exit(2); 1453 } 1454 1455 MainParseArgs(argc, argv); 1456 1457 if (opts.enterFlag) 1458 printf("%s: Entering directory `%s'\n", progname, curdir); 1459 1460 if (stat(curdir, &sa) == -1) { 1461 (void)fprintf(stderr, "%s: %s: %s.\n", 1462 progname, curdir, strerror(errno)); 1463 exit(2); 1464 } 1465 1466 #ifndef NO_PWD_OVERRIDE 1467 HandlePWD(&sa); 1468 #endif 1469 Global_Set(".CURDIR", curdir); 1470 1471 InitObjdir(machine, machine_arch); 1472 1473 Arch_Init(); 1474 Suff_Init(); 1475 Trace_Init(tracefile); 1476 1477 defaultNode = NULL; 1478 (void)time(&now); 1479 1480 Trace_Log(MAKESTART, NULL); 1481 1482 InitVarTargets(); 1483 1484 InitDefSysIncPath(syspath); 1485 } 1486 1487 /* 1488 * Read the system makefile followed by either makefile, Makefile or the 1489 * files given by the -f option. Exit on parse errors. 1490 */ 1491 static void 1492 main_ReadFiles(void) 1493 { 1494 1495 if (!opts.noBuiltins) 1496 ReadBuiltinRules(); 1497 1498 if (!Lst_IsEmpty(&opts.makefiles)) 1499 ReadAllMakefiles(&opts.makefiles); 1500 else 1501 ReadFirstDefaultMakefile(); 1502 } 1503 1504 /* Compute the dependency graph. */ 1505 static void 1506 main_PrepareMaking(void) 1507 { 1508 /* In particular suppress .depend for '-r -V .OBJDIR -f /dev/null' */ 1509 if (!opts.noBuiltins || opts.printVars == PVM_NONE) { 1510 (void)Var_Subst("${.MAKE.DEPENDFILE}", 1511 SCOPE_CMDLINE, VARE_WANTRES, &makeDependfile); 1512 if (makeDependfile[0] != '\0') { 1513 /* TODO: handle errors */ 1514 doing_depend = true; 1515 (void)ReadMakefile(makeDependfile); 1516 doing_depend = false; 1517 } 1518 } 1519 1520 if (enterFlagObj) 1521 printf("%s: Entering directory `%s'\n", progname, objdir); 1522 1523 MakeMode(); 1524 1525 { 1526 FStr makeflags = Var_Value(SCOPE_GLOBAL, MAKEFLAGS); 1527 Global_Append("MFLAGS", makeflags.str); 1528 FStr_Done(&makeflags); 1529 } 1530 1531 InitMaxJobs(); 1532 1533 if (!opts.compatMake && !forceJobs) 1534 opts.compatMake = true; 1535 1536 if (!opts.compatMake) 1537 Job_ServerStart(maxJobTokens, jp_0, jp_1); 1538 DEBUG5(JOB, "job_pipe %d %d, maxjobs %d, tokens %d, compat %d\n", 1539 jp_0, jp_1, opts.maxJobs, maxJobTokens, opts.compatMake ? 1 : 0); 1540 1541 if (opts.printVars == PVM_NONE) 1542 Main_ExportMAKEFLAGS(true); /* initial export */ 1543 1544 InitVpath(); 1545 1546 /* 1547 * Now that all search paths have been read for suffixes et al, it's 1548 * time to add the default search path to their lists... 1549 */ 1550 Suff_ExtendPaths(); 1551 1552 /* 1553 * Propagate attributes through :: dependency lists. 1554 */ 1555 Targ_Propagate(); 1556 1557 /* print the initial graph, if the user requested it */ 1558 if (DEBUG(GRAPH1)) 1559 Targ_PrintGraph(1); 1560 } 1561 1562 /* 1563 * Make the targets. 1564 * If the -v or -V options are given, print variables instead. 1565 * Return whether any of the targets is out-of-date. 1566 */ 1567 static bool 1568 main_Run(void) 1569 { 1570 if (opts.printVars != PVM_NONE) { 1571 /* print the values of any variables requested by the user */ 1572 doPrintVars(); 1573 return false; 1574 } else { 1575 return runTargets(); 1576 } 1577 } 1578 1579 /* Clean up after making the targets. */ 1580 static void 1581 main_CleanUp(void) 1582 { 1583 #ifdef CLEANUP 1584 Lst_DoneCall(&opts.variables, free); 1585 Lst_DoneCall(&opts.makefiles, free); 1586 Lst_DoneCall(&opts.create, free); 1587 #endif 1588 1589 if (DEBUG(GRAPH2)) 1590 Targ_PrintGraph(2); 1591 1592 Trace_Log(MAKEEND, NULL); 1593 1594 if (enterFlagObj) 1595 printf("%s: Leaving directory `%s'\n", progname, objdir); 1596 if (opts.enterFlag) 1597 printf("%s: Leaving directory `%s'\n", progname, curdir); 1598 1599 #ifdef USE_META 1600 meta_finish(); 1601 #endif 1602 Suff_End(); 1603 Targ_End(); 1604 Arch_End(); 1605 Var_End(); 1606 Parse_End(); 1607 Dir_End(); 1608 Job_End(); 1609 Trace_End(); 1610 Str_Intern_End(); 1611 } 1612 1613 /* Determine the exit code. */ 1614 static int 1615 main_Exit(bool outOfDate) 1616 { 1617 if (opts.strict && (main_errors > 0 || Parse_NumErrors() > 0)) 1618 return 2; /* Not 1 so -q can distinguish error */ 1619 return outOfDate ? 1 : 0; 1620 } 1621 1622 int 1623 main(int argc, char **argv) 1624 { 1625 bool outOfDate; 1626 1627 main_Init(argc, argv); 1628 main_ReadFiles(); 1629 main_PrepareMaking(); 1630 outOfDate = main_Run(); 1631 main_CleanUp(); 1632 return main_Exit(outOfDate); 1633 } 1634 1635 /* 1636 * Open and parse the given makefile, with all its side effects. 1637 * Return false if the file could not be opened. 1638 */ 1639 static bool 1640 ReadMakefile(const char *fname) 1641 { 1642 int fd; 1643 char *name, *path = NULL; 1644 1645 if (strcmp(fname, "-") == 0) { 1646 Parse_File("(stdin)", -1); 1647 Var_Set(SCOPE_INTERNAL, "MAKEFILE", ""); 1648 } else { 1649 /* if we've chdir'd, rebuild the path name */ 1650 if (strcmp(curdir, objdir) != 0 && *fname != '/') { 1651 path = str_concat3(curdir, "/", fname); 1652 fd = open(path, O_RDONLY); 1653 if (fd != -1) { 1654 fname = path; 1655 goto found; 1656 } 1657 free(path); 1658 1659 /* If curdir failed, try objdir (ala .depend) */ 1660 path = str_concat3(objdir, "/", fname); 1661 fd = open(path, O_RDONLY); 1662 if (fd != -1) { 1663 fname = path; 1664 goto found; 1665 } 1666 } else { 1667 fd = open(fname, O_RDONLY); 1668 if (fd != -1) 1669 goto found; 1670 } 1671 /* look in -I and system include directories. */ 1672 name = Dir_FindFile(fname, parseIncPath); 1673 if (name == NULL) { 1674 SearchPath *sysInc = Lst_IsEmpty(&sysIncPath->dirs) 1675 ? defSysIncPath : sysIncPath; 1676 name = Dir_FindFile(fname, sysInc); 1677 } 1678 if (name == NULL || (fd = open(name, O_RDONLY)) == -1) { 1679 free(name); 1680 free(path); 1681 return false; 1682 } 1683 fname = name; 1684 /* 1685 * set the MAKEFILE variable desired by System V fans -- the 1686 * placement of the setting here means it gets set to the last 1687 * makefile specified, as it is set by SysV make. 1688 */ 1689 found: 1690 if (!doing_depend) 1691 Var_Set(SCOPE_INTERNAL, "MAKEFILE", fname); 1692 Parse_File(fname, fd); 1693 } 1694 free(path); 1695 return true; 1696 } 1697 1698 /* 1699 * Execute the command in cmd, and return its output (only stdout, not 1700 * stderr). In the output, replace newlines with spaces. 1701 * 1702 * Results: 1703 * The output of the command, can be empty. 1704 * *errfmt returns a format string describing the command failure, 1705 * if any, using a single %s conversion specification. 1706 * TODO: replace errfmt with an actual error message. 1707 */ 1708 char * 1709 Cmd_Exec(const char *cmd, const char **errfmt) 1710 { 1711 const char *args[4]; /* Arguments for invoking the shell */ 1712 int pipefds[2]; 1713 int cpid; /* Child PID */ 1714 int pid; /* PID from wait() */ 1715 int status; /* command exit status */ 1716 Buffer buf; /* buffer to store the result */ 1717 ssize_t bytes_read; 1718 char *res; /* result */ 1719 char *cp; 1720 int saved_errno; 1721 1722 *errfmt = NULL; 1723 1724 if (shellName == NULL) 1725 Shell_Init(); 1726 1727 args[0] = shellName; 1728 args[1] = "-c"; 1729 args[2] = cmd; 1730 args[3] = NULL; 1731 1732 if (pipe(pipefds) == -1) { 1733 *errfmt = "Couldn't create pipe for \"%s\""; 1734 return bmake_strdup(""); 1735 } 1736 1737 Var_ReexportVars(); 1738 1739 switch (cpid = vfork()) { 1740 case 0: 1741 (void)close(pipefds[0]); 1742 (void)dup2(pipefds[1], STDOUT_FILENO); 1743 (void)close(pipefds[1]); 1744 1745 (void)execv(shellPath, UNCONST(args)); 1746 _exit(1); 1747 /* NOTREACHED */ 1748 1749 case -1: 1750 *errfmt = "Couldn't exec \"%s\""; 1751 return bmake_strdup(""); 1752 } 1753 1754 (void)close(pipefds[1]); /* No need for the writing half */ 1755 1756 saved_errno = 0; 1757 Buf_Init(&buf); 1758 1759 do { 1760 char result[BUFSIZ]; 1761 bytes_read = read(pipefds[0], result, sizeof result); 1762 if (bytes_read > 0) 1763 Buf_AddBytes(&buf, result, (size_t)bytes_read); 1764 } while (bytes_read > 0 || (bytes_read == -1 && errno == EINTR)); 1765 if (bytes_read == -1) 1766 saved_errno = errno; 1767 1768 (void)close(pipefds[0]); /* Close the input side of the pipe. */ 1769 1770 while ((pid = waitpid(cpid, &status, 0)) != cpid && pid >= 0) 1771 JobReapChild(pid, status, false); 1772 1773 if (Buf_EndsWith(&buf, '\n')) 1774 buf.data[buf.len - 1] = '\0'; 1775 res = Buf_DoneData(&buf); 1776 1777 for (cp = res; *cp != '\0'; cp++) 1778 if (*cp == '\n') 1779 *cp = ' '; 1780 1781 if (WIFSIGNALED(status)) 1782 *errfmt = "\"%s\" exited on a signal"; 1783 else if (WEXITSTATUS(status) != 0) 1784 *errfmt = "\"%s\" returned non-zero status"; 1785 else if (saved_errno != 0) 1786 *errfmt = "Couldn't read shell's output for \"%s\""; 1787 1788 return res; 1789 } 1790 1791 /* 1792 * Print a printf-style error message. 1793 * 1794 * In default mode, this error message has no consequences, for compatibility 1795 * reasons, in particular it does not affect the exit status. Only in lint 1796 * mode (-dL) it does. 1797 */ 1798 void 1799 Error(const char *fmt, ...) 1800 { 1801 va_list ap; 1802 FILE *f; 1803 1804 f = opts.debug_file; 1805 if (f == stdout) 1806 f = stderr; 1807 (void)fflush(stdout); 1808 1809 for (;;) { 1810 fprintf(f, "%s: ", progname); 1811 va_start(ap, fmt); 1812 (void)vfprintf(f, fmt, ap); 1813 va_end(ap); 1814 (void)fprintf(f, "\n"); 1815 (void)fflush(f); 1816 if (f == stderr) 1817 break; 1818 f = stderr; 1819 } 1820 main_errors++; 1821 } 1822 1823 /* 1824 * Wait for any running jobs to finish, then produce an error message, 1825 * finally exit immediately. 1826 * 1827 * Exiting immediately differs from Parse_Error, which exits only after the 1828 * current top-level makefile has been parsed completely. 1829 */ 1830 void 1831 Fatal(const char *fmt, ...) 1832 { 1833 va_list ap; 1834 1835 if (jobsRunning) 1836 Job_Wait(); 1837 1838 (void)fflush(stdout); 1839 va_start(ap, fmt); 1840 (void)vfprintf(stderr, fmt, ap); 1841 va_end(ap); 1842 (void)fprintf(stderr, "\n"); 1843 (void)fflush(stderr); 1844 1845 PrintOnError(NULL, NULL); 1846 1847 if (DEBUG(GRAPH2) || DEBUG(GRAPH3)) 1848 Targ_PrintGraph(2); 1849 Trace_Log(MAKEERROR, NULL); 1850 exit(2); /* Not 1 so -q can distinguish error */ 1851 } 1852 1853 /* 1854 * Major exception once jobs are being created. 1855 * Kills all jobs, prints a message and exits. 1856 */ 1857 void 1858 Punt(const char *fmt, ...) 1859 { 1860 va_list ap; 1861 1862 (void)fflush(stdout); 1863 (void)fprintf(stderr, "%s: ", progname); 1864 va_start(ap, fmt); 1865 (void)vfprintf(stderr, fmt, ap); 1866 va_end(ap); 1867 (void)fprintf(stderr, "\n"); 1868 (void)fflush(stderr); 1869 1870 PrintOnError(NULL, NULL); 1871 1872 DieHorribly(); 1873 } 1874 1875 /* Exit without giving a message. */ 1876 void 1877 DieHorribly(void) 1878 { 1879 if (jobsRunning) 1880 Job_AbortAll(); 1881 if (DEBUG(GRAPH2)) 1882 Targ_PrintGraph(2); 1883 Trace_Log(MAKEERROR, NULL); 1884 exit(2); /* Not 1 so -q can distinguish error */ 1885 } 1886 1887 /* 1888 * Called when aborting due to errors in child shell to signal abnormal exit. 1889 * The program exits. 1890 * Errors is the number of errors encountered in Make_Make. 1891 */ 1892 void 1893 Finish(int errs) 1894 { 1895 if (shouldDieQuietly(NULL, -1)) 1896 exit(2); 1897 Fatal("%d error%s", errs, errs == 1 ? "" : "s"); 1898 } 1899 1900 bool 1901 unlink_file(const char *file) 1902 { 1903 struct stat st; 1904 1905 if (lstat(file, &st) == -1) 1906 return false; 1907 1908 if (S_ISDIR(st.st_mode)) { 1909 errno = EISDIR; 1910 return false; 1911 } 1912 return unlink(file) == 0; 1913 } 1914 1915 static void 1916 write_all(int fd, const void *data, size_t n) 1917 { 1918 const char *mem = data; 1919 1920 while (n > 0) { 1921 ssize_t written = write(fd, mem, n); 1922 /* XXX: Should this EAGAIN be EINTR? */ 1923 if (written == -1 && errno == EAGAIN) 1924 continue; 1925 if (written == -1) 1926 break; 1927 mem += written; 1928 n -= (size_t)written; 1929 } 1930 } 1931 1932 /* Print why exec failed, avoiding stdio. */ 1933 void MAKE_ATTR_DEAD 1934 execDie(const char *af, const char *av) 1935 { 1936 Buffer buf; 1937 1938 Buf_Init(&buf); 1939 Buf_AddStr(&buf, progname); 1940 Buf_AddStr(&buf, ": "); 1941 Buf_AddStr(&buf, af); 1942 Buf_AddStr(&buf, "("); 1943 Buf_AddStr(&buf, av); 1944 Buf_AddStr(&buf, ") failed ("); 1945 Buf_AddStr(&buf, strerror(errno)); 1946 Buf_AddStr(&buf, ")\n"); 1947 1948 write_all(STDERR_FILENO, buf.data, buf.len); 1949 1950 Buf_Done(&buf); 1951 _exit(1); 1952 } 1953 1954 static void 1955 purge_relative_cached_realpaths(void) 1956 { 1957 HashEntry *he, *nhe; 1958 HashIter hi; 1959 1960 HashIter_Init(&hi, &cached_realpaths); 1961 he = HashIter_Next(&hi); 1962 while (he != NULL) { 1963 nhe = HashIter_Next(&hi); 1964 if (he->key[0] != '/') { 1965 DEBUG1(DIR, "cached_realpath: purging %s\n", he->key); 1966 HashTable_DeleteEntry(&cached_realpaths, he); 1967 /* 1968 * XXX: What about the allocated he->value? Either 1969 * free them or document why they cannot be freed. 1970 */ 1971 } 1972 he = nhe; 1973 } 1974 } 1975 1976 const char * 1977 cached_realpath(const char *pathname, char *resolved) 1978 { 1979 const char *rp; 1980 1981 if (pathname == NULL || pathname[0] == '\0') 1982 return NULL; 1983 1984 rp = HashTable_FindValue(&cached_realpaths, pathname); 1985 if (rp != NULL) { 1986 /* a hit */ 1987 strncpy(resolved, rp, MAXPATHLEN); 1988 resolved[MAXPATHLEN - 1] = '\0'; 1989 return resolved; 1990 } 1991 1992 rp = realpath(pathname, resolved); 1993 if (rp != NULL) { 1994 HashTable_Set(&cached_realpaths, pathname, bmake_strdup(rp)); 1995 DEBUG2(DIR, "cached_realpath: %s -> %s\n", pathname, rp); 1996 return resolved; 1997 } 1998 1999 /* should we negative-cache? */ 2000 return NULL; 2001 } 2002 2003 /* 2004 * Return true if we should die without noise. 2005 * For example our failing child was a sub-make or failure happened elsewhere. 2006 */ 2007 bool 2008 shouldDieQuietly(GNode *gn, int bf) 2009 { 2010 static int quietly = -1; 2011 2012 if (quietly < 0) { 2013 if (DEBUG(JOB) || 2014 !GetBooleanExpr("${.MAKE.DIE_QUIETLY}", true)) 2015 quietly = 0; 2016 else if (bf >= 0) 2017 quietly = bf; 2018 else 2019 quietly = (gn != NULL && (gn->type & OP_MAKE)) ? 1 : 0; 2020 } 2021 return quietly != 0; 2022 } 2023 2024 static void 2025 SetErrorVars(GNode *gn) 2026 { 2027 StringListNode *ln; 2028 2029 /* 2030 * We can print this even if there is no .ERROR target. 2031 */ 2032 Global_Set(".ERROR_TARGET", gn->name); 2033 Global_Delete(".ERROR_CMD"); 2034 2035 for (ln = gn->commands.first; ln != NULL; ln = ln->next) { 2036 const char *cmd = ln->datum; 2037 2038 if (cmd == NULL) 2039 break; 2040 Global_Append(".ERROR_CMD", cmd); 2041 } 2042 } 2043 2044 /* 2045 * Print some helpful information in case of an error. 2046 * The caller should exit soon after calling this function. 2047 */ 2048 void 2049 PrintOnError(GNode *gn, const char *msg) 2050 { 2051 static GNode *errorNode = NULL; 2052 2053 if (DEBUG(HASH)) { 2054 Targ_Stats(); 2055 Var_Stats(); 2056 } 2057 2058 if (errorNode != NULL) 2059 return; /* we've been here! */ 2060 2061 if (msg != NULL) 2062 printf("%s", msg); 2063 printf("\n%s: stopped in %s\n", progname, curdir); 2064 2065 /* we generally want to keep quiet if a sub-make died */ 2066 if (shouldDieQuietly(gn, -1)) 2067 return; 2068 2069 if (gn != NULL) 2070 SetErrorVars(gn); 2071 2072 { 2073 char *errorVarsValues; 2074 (void)Var_Subst("${MAKE_PRINT_VAR_ON_ERROR:@v@$v='${$v}'\n@}", 2075 SCOPE_GLOBAL, VARE_WANTRES, &errorVarsValues); 2076 /* TODO: handle errors */ 2077 printf("%s", errorVarsValues); 2078 free(errorVarsValues); 2079 } 2080 2081 fflush(stdout); 2082 2083 /* 2084 * Finally, see if there is a .ERROR target, and run it if so. 2085 */ 2086 errorNode = Targ_FindNode(".ERROR"); 2087 if (errorNode != NULL) { 2088 errorNode->type |= OP_SPECIAL; 2089 Compat_Make(errorNode, errorNode); 2090 } 2091 } 2092 2093 void 2094 Main_ExportMAKEFLAGS(bool first) 2095 { 2096 static bool once = true; 2097 char *flags; 2098 2099 if (once != first) 2100 return; 2101 once = false; 2102 2103 (void)Var_Subst( 2104 "${.MAKEFLAGS} ${.MAKEOVERRIDES:O:u:@v@$v=${$v:Q}@}", 2105 SCOPE_CMDLINE, VARE_WANTRES, &flags); 2106 /* TODO: handle errors */ 2107 if (flags[0] != '\0') { 2108 #ifdef POSIX 2109 setenv("MAKEFLAGS", flags, 1); 2110 #else 2111 setenv("MAKE", flags, 1); 2112 #endif 2113 } 2114 } 2115 2116 char * 2117 getTmpdir(void) 2118 { 2119 static char *tmpdir = NULL; 2120 struct stat st; 2121 2122 if (tmpdir != NULL) 2123 return tmpdir; 2124 2125 /* Honor $TMPDIR if it is valid, strip a trailing '/'. */ 2126 (void)Var_Subst("${TMPDIR:tA:U" _PATH_TMP ":S,/$,,W}/", 2127 SCOPE_GLOBAL, VARE_WANTRES, &tmpdir); 2128 /* TODO: handle errors */ 2129 2130 if (stat(tmpdir, &st) < 0 || !S_ISDIR(st.st_mode)) { 2131 free(tmpdir); 2132 tmpdir = bmake_strdup(_PATH_TMP); 2133 } 2134 return tmpdir; 2135 } 2136 2137 /* 2138 * Create and open a temp file using "pattern". 2139 * If out_fname is provided, set it to a copy of the filename created. 2140 * Otherwise unlink the file once open. 2141 */ 2142 int 2143 mkTempFile(const char *pattern, char *tfile, size_t tfile_sz) 2144 { 2145 static char *tmpdir = NULL; 2146 char tbuf[MAXPATHLEN]; 2147 int fd; 2148 2149 if (pattern == NULL) 2150 pattern = TMPPAT; 2151 if (tmpdir == NULL) 2152 tmpdir = getTmpdir(); 2153 if (tfile == NULL) { 2154 tfile = tbuf; 2155 tfile_sz = sizeof tbuf; 2156 } 2157 2158 if (pattern[0] == '/') 2159 snprintf(tfile, tfile_sz, "%s", pattern); 2160 else 2161 snprintf(tfile, tfile_sz, "%s%s", tmpdir, pattern); 2162 2163 if ((fd = mkstemp(tfile)) < 0) 2164 Punt("Could not create temporary file %s: %s", tfile, 2165 strerror(errno)); 2166 if (tfile == tbuf) 2167 unlink(tfile); /* we just want the descriptor */ 2168 2169 return fd; 2170 } 2171 2172 /* 2173 * Convert a string representation of a boolean into a boolean value. 2174 * Anything that looks like "No", "False", "Off", "0" etc. is false, 2175 * the empty string is the fallback, everything else is true. 2176 */ 2177 bool 2178 ParseBoolean(const char *s, bool fallback) 2179 { 2180 char ch = ch_tolower(s[0]); 2181 if (ch == '\0') 2182 return fallback; 2183 if (ch == '0' || ch == 'f' || ch == 'n') 2184 return false; 2185 if (ch == 'o') 2186 return ch_tolower(s[1]) != 'f'; 2187 return true; 2188 } 2189
Indexes created Tue Sep 23 14:10:03 GMT 2025