main.c revision 1.581
1 /* $NetBSD: main.c,v 1.581 2022/05/07 08:01:20 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 1.581 2022/05/07 08:01:20 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 finish; 318 default: 319 (void)fprintf(stderr, 320 "%s: illegal argument to d option -- %c\n", 321 progname, *modules); 322 usage(); 323 } 324 } 325 326 finish: 327 opts.debug = debug; 328 329 setvbuf(opts.debug_file, NULL, _IONBF, 0); 330 if (opts.debug_file != stdout) 331 setvbuf(stdout, NULL, _IOLBF, 0); 332 } 333 334 /* Is path relative or does it contain any relative component "." or ".."? */ 335 static bool 336 IsRelativePath(const char *path) 337 { 338 const char *p; 339 340 if (path[0] != '/') 341 return true; 342 p = path; 343 while ((p = strstr(p, "/.")) != NULL) { 344 p += 2; 345 if (*p == '.') 346 p++; 347 if (*p == '/' || *p == '\0') 348 return true; 349 } 350 return false; 351 } 352 353 static void 354 MainParseArgChdir(const char *argvalue) 355 { 356 struct stat sa, sb; 357 358 if (chdir(argvalue) == -1) { 359 (void)fprintf(stderr, "%s: chdir %s: %s\n", 360 progname, argvalue, strerror(errno)); 361 exit(2); /* Not 1 so -q can distinguish error */ 362 } 363 if (getcwd(curdir, MAXPATHLEN) == NULL) { 364 (void)fprintf(stderr, "%s: %s.\n", progname, strerror(errno)); 365 exit(2); 366 } 367 if (!IsRelativePath(argvalue) && 368 stat(argvalue, &sa) != -1 && 369 stat(curdir, &sb) != -1 && 370 sa.st_ino == sb.st_ino && 371 sa.st_dev == sb.st_dev) 372 strncpy(curdir, argvalue, MAXPATHLEN); 373 ignorePWD = true; 374 } 375 376 static void 377 MainParseArgJobsInternal(const char *argvalue) 378 { 379 char end; 380 if (sscanf(argvalue, "%d,%d%c", &jp_0, &jp_1, &end) != 2) { 381 (void)fprintf(stderr, 382 "%s: internal error -- J option malformed (%s)\n", 383 progname, argvalue); 384 usage(); 385 } 386 if ((fcntl(jp_0, F_GETFD, 0) < 0) || 387 (fcntl(jp_1, F_GETFD, 0) < 0)) { 388 jp_0 = -1; 389 jp_1 = -1; 390 opts.compatMake = true; 391 } else { 392 Global_Append(MAKEFLAGS, "-J"); 393 Global_Append(MAKEFLAGS, argvalue); 394 } 395 } 396 397 static void 398 MainParseArgJobs(const char *argvalue) 399 { 400 char *p; 401 402 forceJobs = true; 403 opts.maxJobs = (int)strtol(argvalue, &p, 0); 404 if (*p != '\0' || opts.maxJobs < 1) { 405 (void)fprintf(stderr, 406 "%s: illegal argument to -j -- must be positive integer!\n", 407 progname); 408 exit(2); /* Not 1 so -q can distinguish error */ 409 } 410 Global_Append(MAKEFLAGS, "-j"); 411 Global_Append(MAKEFLAGS, argvalue); 412 Global_Set(".MAKE.JOBS", argvalue); 413 maxJobTokens = opts.maxJobs; 414 } 415 416 static void 417 MainParseArgSysInc(const char *argvalue) 418 { 419 /* look for magic parent directory search string */ 420 if (strncmp(".../", argvalue, 4) == 0) { 421 char *found_path = Dir_FindHereOrAbove(curdir, argvalue + 4); 422 if (found_path == NULL) 423 return; 424 (void)SearchPath_Add(sysIncPath, found_path); 425 free(found_path); 426 } else { 427 (void)SearchPath_Add(sysIncPath, argvalue); 428 } 429 Global_Append(MAKEFLAGS, "-m"); 430 Global_Append(MAKEFLAGS, argvalue); 431 } 432 433 static bool 434 MainParseArg(char c, const char *argvalue) 435 { 436 switch (c) { 437 case '\0': 438 break; 439 case 'B': 440 opts.compatMake = true; 441 Global_Append(MAKEFLAGS, "-B"); 442 Global_Set(MAKE_MODE, "compat"); 443 break; 444 case 'C': 445 MainParseArgChdir(argvalue); 446 break; 447 case 'D': 448 if (argvalue[0] == '\0') 449 return false; 450 Var_SetExpand(SCOPE_GLOBAL, argvalue, "1"); 451 Global_Append(MAKEFLAGS, "-D"); 452 Global_Append(MAKEFLAGS, argvalue); 453 break; 454 case 'I': 455 Parse_AddIncludeDir(argvalue); 456 Global_Append(MAKEFLAGS, "-I"); 457 Global_Append(MAKEFLAGS, argvalue); 458 break; 459 case 'J': 460 MainParseArgJobsInternal(argvalue); 461 break; 462 case 'N': 463 opts.noExecute = true; 464 opts.noRecursiveExecute = true; 465 Global_Append(MAKEFLAGS, "-N"); 466 break; 467 case 'S': 468 opts.keepgoing = false; 469 Global_Append(MAKEFLAGS, "-S"); 470 break; 471 case 'T': 472 tracefile = bmake_strdup(argvalue); 473 Global_Append(MAKEFLAGS, "-T"); 474 Global_Append(MAKEFLAGS, argvalue); 475 break; 476 case 'V': 477 case 'v': 478 opts.printVars = c == 'v' ? PVM_EXPANDED : PVM_UNEXPANDED; 479 Lst_Append(&opts.variables, bmake_strdup(argvalue)); 480 /* XXX: Why always -V? */ 481 Global_Append(MAKEFLAGS, "-V"); 482 Global_Append(MAKEFLAGS, argvalue); 483 break; 484 case 'W': 485 opts.parseWarnFatal = true; 486 /* XXX: why no Global_Append? */ 487 break; 488 case 'X': 489 opts.varNoExportEnv = true; 490 Global_Append(MAKEFLAGS, "-X"); 491 break; 492 case 'd': 493 /* If '-d-opts' don't pass to children */ 494 if (argvalue[0] == '-') 495 argvalue++; 496 else { 497 Global_Append(MAKEFLAGS, "-d"); 498 Global_Append(MAKEFLAGS, argvalue); 499 } 500 MainParseArgDebug(argvalue); 501 break; 502 case 'e': 503 opts.checkEnvFirst = true; 504 Global_Append(MAKEFLAGS, "-e"); 505 break; 506 case 'f': 507 Lst_Append(&opts.makefiles, bmake_strdup(argvalue)); 508 break; 509 case 'i': 510 opts.ignoreErrors = true; 511 Global_Append(MAKEFLAGS, "-i"); 512 break; 513 case 'j': 514 MainParseArgJobs(argvalue); 515 break; 516 case 'k': 517 opts.keepgoing = true; 518 Global_Append(MAKEFLAGS, "-k"); 519 break; 520 case 'm': 521 MainParseArgSysInc(argvalue); 522 /* XXX: why no Var_Append? */ 523 break; 524 case 'n': 525 opts.noExecute = true; 526 Global_Append(MAKEFLAGS, "-n"); 527 break; 528 case 'q': 529 opts.query = true; 530 /* Kind of nonsensical, wot? */ 531 Global_Append(MAKEFLAGS, "-q"); 532 break; 533 case 'r': 534 opts.noBuiltins = true; 535 Global_Append(MAKEFLAGS, "-r"); 536 break; 537 case 's': 538 opts.silent = true; 539 Global_Append(MAKEFLAGS, "-s"); 540 break; 541 case 't': 542 opts.touch = true; 543 Global_Append(MAKEFLAGS, "-t"); 544 break; 545 case 'w': 546 opts.enterFlag = true; 547 Global_Append(MAKEFLAGS, "-w"); 548 break; 549 default: 550 usage(); 551 } 552 return true; 553 } 554 555 /* 556 * Parse the given arguments. Called from main() and from 557 * Main_ParseArgLine() when the .MAKEFLAGS target is used. 558 * 559 * The arguments must be treated as read-only and will be freed after the 560 * call. 561 * 562 * XXX: Deal with command line overriding .MAKEFLAGS in makefile 563 */ 564 static void 565 MainParseArgs(int argc, char **argv) 566 { 567 char c; 568 int arginc; 569 char *argvalue; 570 char *optscan; 571 bool inOption, dashDash = false; 572 573 const char *optspecs = "BC:D:I:J:NST:V:WXd:ef:ij:km:nqrstv:w"; 574 /* Can't actually use getopt(3) because rescanning is not portable */ 575 576 rearg: 577 inOption = false; 578 optscan = NULL; 579 while (argc > 1) { 580 const char *optspec; 581 if (!inOption) 582 optscan = argv[1]; 583 c = *optscan++; 584 arginc = 0; 585 if (inOption) { 586 if (c == '\0') { 587 argv++; 588 argc--; 589 inOption = false; 590 continue; 591 } 592 } else { 593 if (c != '-' || dashDash) 594 break; 595 inOption = true; 596 c = *optscan++; 597 } 598 /* '-' found at some earlier point */ 599 optspec = strchr(optspecs, c); 600 if (c != '\0' && optspec != NULL && optspec[1] == ':') { 601 /* 602 * -<something> found, and <something> should have an 603 * argument 604 */ 605 inOption = false; 606 arginc = 1; 607 argvalue = optscan; 608 if (*argvalue == '\0') { 609 if (argc < 3) 610 goto noarg; 611 argvalue = argv[2]; 612 arginc = 2; 613 } 614 } else { 615 argvalue = NULL; 616 } 617 switch (c) { 618 case '\0': 619 arginc = 1; 620 inOption = false; 621 break; 622 case '-': 623 dashDash = true; 624 break; 625 default: 626 if (!MainParseArg(c, argvalue)) 627 goto noarg; 628 } 629 argv += arginc; 630 argc -= arginc; 631 } 632 633 /* 634 * See if the rest of the arguments are variable assignments and 635 * perform them if so. Else take them to be targets and stuff them 636 * on the end of the "create" list. 637 */ 638 for (; argc > 1; argv++, argc--) { 639 if (!Parse_VarAssign(argv[1], false, SCOPE_CMDLINE)) { 640 if (argv[1][0] == '\0') 641 Punt("illegal (null) argument."); 642 if (argv[1][0] == '-' && !dashDash) 643 goto rearg; 644 Lst_Append(&opts.create, bmake_strdup(argv[1])); 645 } 646 } 647 648 return; 649 noarg: 650 (void)fprintf(stderr, "%s: option requires an argument -- %c\n", 651 progname, c); 652 usage(); 653 } 654 655 /* 656 * Break a line of arguments into words and parse them. 657 * 658 * Used when a .MFLAGS or .MAKEFLAGS target is encountered during parsing and 659 * by main() when reading the MAKEFLAGS environment variable. 660 */ 661 void 662 Main_ParseArgLine(const char *line) 663 { 664 Words words; 665 char *buf; 666 667 if (line == NULL) 668 return; 669 /* XXX: don't use line as an iterator variable */ 670 for (; *line == ' '; line++) 671 continue; 672 if (line[0] == '\0') 673 return; 674 675 { 676 FStr argv0 = Var_Value(SCOPE_GLOBAL, ".MAKE"); 677 buf = str_concat3(argv0.str, " ", line); 678 FStr_Done(&argv0); 679 } 680 681 words = Str_Words(buf, true); 682 if (words.words == NULL) { 683 Error("Unterminated quoted string [%s]", buf); 684 free(buf); 685 return; 686 } 687 free(buf); 688 MainParseArgs((int)words.len, words.words); 689 690 Words_Free(words); 691 } 692 693 bool 694 Main_SetObjdir(bool writable, const char *fmt, ...) 695 { 696 struct stat sb; 697 char *path; 698 char buf[MAXPATHLEN + 1]; 699 char buf2[MAXPATHLEN + 1]; 700 va_list ap; 701 702 va_start(ap, fmt); 703 vsnprintf(path = buf, MAXPATHLEN, fmt, ap); 704 va_end(ap); 705 706 if (path[0] != '/') { 707 snprintf(buf2, MAXPATHLEN, "%s/%s", curdir, path); 708 path = buf2; 709 } 710 711 /* look for the directory and try to chdir there */ 712 if (stat(path, &sb) != 0 || !S_ISDIR(sb.st_mode)) 713 return false; 714 715 if ((writable && access(path, W_OK) != 0) || chdir(path) != 0) { 716 (void)fprintf(stderr, "%s: warning: %s: %s.\n", 717 progname, path, strerror(errno)); 718 return false; 719 } 720 721 snprintf(objdir, sizeof objdir, "%s", path); 722 Global_Set(".OBJDIR", objdir); 723 setenv("PWD", objdir, 1); 724 Dir_InitDot(); 725 purge_relative_cached_realpaths(); 726 if (opts.enterFlag && strcmp(objdir, curdir) != 0) 727 enterFlagObj = true; 728 return true; 729 } 730 731 static bool 732 SetVarObjdir(bool writable, const char *var, const char *suffix) 733 { 734 FStr path = Var_Value(SCOPE_CMDLINE, var); 735 736 if (path.str == NULL || path.str[0] == '\0') { 737 FStr_Done(&path); 738 return false; 739 } 740 741 Var_Expand(&path, SCOPE_GLOBAL, VARE_WANTRES); 742 743 (void)Main_SetObjdir(writable, "%s%s", path.str, suffix); 744 745 FStr_Done(&path); 746 return true; 747 } 748 749 /* 750 * Splits str into words, adding them to the list. 751 * The string must be kept alive as long as the list. 752 */ 753 int 754 str2Lst_Append(StringList *lp, char *str) 755 { 756 char *cp; 757 int n; 758 759 const char *sep = " \t"; 760 761 for (n = 0, cp = strtok(str, sep); cp != NULL; cp = strtok(NULL, sep)) { 762 Lst_Append(lp, cp); 763 n++; 764 } 765 return n; 766 } 767 768 #ifdef SIGINFO 769 /*ARGSUSED*/ 770 static void 771 siginfo(int signo MAKE_ATTR_UNUSED) 772 { 773 char dir[MAXPATHLEN]; 774 char str[2 * MAXPATHLEN]; 775 int len; 776 if (getcwd(dir, sizeof dir) == NULL) 777 return; 778 len = snprintf(str, sizeof str, "%s: Working in: %s\n", progname, dir); 779 if (len > 0) 780 (void)write(STDERR_FILENO, str, (size_t)len); 781 } 782 #endif 783 784 /* Allow makefiles some control over the mode we run in. */ 785 static void 786 MakeMode(void) 787 { 788 char *mode; 789 790 (void)Var_Subst("${" MAKE_MODE ":tl}", SCOPE_GLOBAL, VARE_WANTRES, &mode); 791 /* TODO: handle errors */ 792 793 if (mode[0] != '\0') { 794 if (strstr(mode, "compat") != NULL) { 795 opts.compatMake = true; 796 forceJobs = false; 797 } 798 #if USE_META 799 if (strstr(mode, "meta") != NULL) 800 meta_mode_init(mode); 801 #endif 802 } 803 804 free(mode); 805 } 806 807 static void 808 PrintVar(const char *varname, bool expandVars) 809 { 810 if (strchr(varname, '$') != NULL) { 811 char *evalue; 812 (void)Var_Subst(varname, SCOPE_GLOBAL, VARE_WANTRES, &evalue); 813 /* TODO: handle errors */ 814 printf("%s\n", evalue); 815 free(evalue); 816 817 } else if (expandVars) { 818 char *expr = str_concat3("${", varname, "}"); 819 char *evalue; 820 (void)Var_Subst(expr, SCOPE_GLOBAL, VARE_WANTRES, &evalue); 821 /* TODO: handle errors */ 822 free(expr); 823 printf("%s\n", evalue); 824 free(evalue); 825 826 } else { 827 FStr value = Var_Value(SCOPE_GLOBAL, varname); 828 printf("%s\n", value.str != NULL ? value.str : ""); 829 FStr_Done(&value); 830 } 831 } 832 833 /* 834 * Return a bool based on a variable. 835 * 836 * If the knob is not set, return the fallback. 837 * If set, anything that looks or smells like "No", "False", "Off", "0", etc. 838 * is false, otherwise true. 839 */ 840 bool 841 GetBooleanExpr(const char *expr, bool fallback) 842 { 843 char *value; 844 bool res; 845 846 (void)Var_Subst(expr, SCOPE_GLOBAL, VARE_WANTRES, &value); 847 /* TODO: handle errors */ 848 res = ParseBoolean(value, fallback); 849 free(value); 850 return res; 851 } 852 853 static void 854 doPrintVars(void) 855 { 856 StringListNode *ln; 857 bool expandVars; 858 859 if (opts.printVars == PVM_EXPANDED) 860 expandVars = true; 861 else if (opts.debugVflag) 862 expandVars = false; 863 else 864 expandVars = GetBooleanExpr("${.MAKE.EXPAND_VARIABLES}", 865 false); 866 867 for (ln = opts.variables.first; ln != NULL; ln = ln->next) { 868 const char *varname = ln->datum; 869 PrintVar(varname, expandVars); 870 } 871 } 872 873 static bool 874 runTargets(void) 875 { 876 GNodeList targs = LST_INIT; /* target nodes to create */ 877 bool outOfDate; /* false if all targets up to date */ 878 879 /* 880 * Have now read the entire graph and need to make a list of 881 * targets to create. If none was given on the command line, 882 * we consult the parsing module to find the main target(s) 883 * to create. 884 */ 885 if (Lst_IsEmpty(&opts.create)) 886 Parse_MainName(&targs); 887 else 888 Targ_FindList(&targs, &opts.create); 889 890 if (!opts.compatMake) { 891 /* 892 * Initialize job module before traversing the graph 893 * now that any .BEGIN and .END targets have been read. 894 * This is done only if the -q flag wasn't given 895 * (to prevent the .BEGIN from being executed should 896 * it exist). 897 */ 898 if (!opts.query) { 899 Job_Init(); 900 jobsRunning = true; 901 } 902 903 /* Traverse the graph, checking on all the targets */ 904 outOfDate = Make_Run(&targs); 905 } else { 906 Compat_MakeAll(&targs); 907 outOfDate = false; 908 } 909 Lst_Done(&targs); /* Don't free the targets themselves. */ 910 return outOfDate; 911 } 912 913 /* 914 * Set up the .TARGETS variable to contain the list of targets to be created. 915 * If none specified, make the variable empty for now, the parser will fill 916 * in the default or .MAIN target later. 917 */ 918 static void 919 InitVarTargets(void) 920 { 921 StringListNode *ln; 922 923 if (Lst_IsEmpty(&opts.create)) { 924 Global_Set(".TARGETS", ""); 925 return; 926 } 927 928 for (ln = opts.create.first; ln != NULL; ln = ln->next) { 929 const char *name = ln->datum; 930 Global_Append(".TARGETS", name); 931 } 932 } 933 934 static void 935 InitRandom(void) 936 { 937 struct timeval tv; 938 939 gettimeofday(&tv, NULL); 940 srandom((unsigned int)(tv.tv_sec + tv.tv_usec)); 941 } 942 943 static const char * 944 InitVarMachine(const struct utsname *utsname MAKE_ATTR_UNUSED) 945 { 946 const char *machine = getenv("MACHINE"); 947 if (machine != NULL) 948 return machine; 949 950 #if defined(MAKE_NATIVE) 951 return utsname->machine; 952 #elif defined(MAKE_MACHINE) 953 return MAKE_MACHINE; 954 #else 955 return "unknown"; 956 #endif 957 } 958 959 static const char * 960 InitVarMachineArch(void) 961 { 962 const char *env = getenv("MACHINE_ARCH"); 963 if (env != NULL) 964 return env; 965 966 #ifdef MAKE_NATIVE 967 { 968 struct utsname utsname; 969 static char machine_arch_buf[sizeof utsname.machine]; 970 const int mib[2] = { CTL_HW, HW_MACHINE_ARCH }; 971 size_t len = sizeof machine_arch_buf; 972 973 if (sysctl(mib, (unsigned int)__arraycount(mib), 974 machine_arch_buf, &len, NULL, 0) < 0) { 975 (void)fprintf(stderr, "%s: sysctl failed (%s).\n", 976 progname, strerror(errno)); 977 exit(2); 978 } 979 980 return machine_arch_buf; 981 } 982 #elif defined(MACHINE_ARCH) 983 return MACHINE_ARCH; 984 #elif defined(MAKE_MACHINE_ARCH) 985 return MAKE_MACHINE_ARCH; 986 #else 987 return "unknown"; 988 #endif 989 } 990 991 #ifndef NO_PWD_OVERRIDE 992 /* 993 * All this code is so that we know where we are when we start up 994 * on a different machine with pmake. 995 * 996 * XXX: Make no longer has "local" and "remote" mode. Is this code still 997 * necessary? 998 * 999 * Overriding getcwd() with $PWD totally breaks MAKEOBJDIRPREFIX 1000 * since the value of curdir can vary depending on how we got 1001 * here. Ie sitting at a shell prompt (shell that provides $PWD) 1002 * or via subdir.mk in which case its likely a shell which does 1003 * not provide it. 1004 * 1005 * So, to stop it breaking this case only, we ignore PWD if 1006 * MAKEOBJDIRPREFIX is set or MAKEOBJDIR contains a variable expression. 1007 */ 1008 static void 1009 HandlePWD(const struct stat *curdir_st) 1010 { 1011 char *pwd; 1012 FStr makeobjdir; 1013 struct stat pwd_st; 1014 1015 if (ignorePWD || (pwd = getenv("PWD")) == NULL) 1016 return; 1017 1018 if (Var_Exists(SCOPE_CMDLINE, "MAKEOBJDIRPREFIX")) 1019 return; 1020 1021 makeobjdir = Var_Value(SCOPE_CMDLINE, "MAKEOBJDIR"); 1022 if (makeobjdir.str != NULL && strchr(makeobjdir.str, '$') != NULL) 1023 goto ignore_pwd; 1024 1025 if (stat(pwd, &pwd_st) == 0 && 1026 curdir_st->st_ino == pwd_st.st_ino && 1027 curdir_st->st_dev == pwd_st.st_dev) 1028 (void)strncpy(curdir, pwd, MAXPATHLEN); 1029 1030 ignore_pwd: 1031 FStr_Done(&makeobjdir); 1032 } 1033 #endif 1034 1035 /* 1036 * Find the .OBJDIR. If MAKEOBJDIRPREFIX, or failing that, MAKEOBJDIR is set 1037 * in the environment, try only that value and fall back to .CURDIR if it 1038 * does not exist. 1039 * 1040 * Otherwise, try _PATH_OBJDIR.MACHINE-MACHINE_ARCH, _PATH_OBJDIR.MACHINE, 1041 * and finally _PATH_OBJDIRPREFIX`pwd`, in that order. If none of these 1042 * paths exist, just use .CURDIR. 1043 */ 1044 static void 1045 InitObjdir(const char *machine, const char *machine_arch) 1046 { 1047 bool writable; 1048 1049 Dir_InitCur(curdir); 1050 writable = GetBooleanExpr("${MAKE_OBJDIR_CHECK_WRITABLE}", true); 1051 (void)Main_SetObjdir(false, "%s", curdir); 1052 1053 if (!SetVarObjdir(writable, "MAKEOBJDIRPREFIX", curdir) && 1054 !SetVarObjdir(writable, "MAKEOBJDIR", "") && 1055 !Main_SetObjdir(writable, "%s.%s-%s", _PATH_OBJDIR, machine, machine_arch) && 1056 !Main_SetObjdir(writable, "%s.%s", _PATH_OBJDIR, machine) && 1057 !Main_SetObjdir(writable, "%s", _PATH_OBJDIR)) 1058 (void)Main_SetObjdir(writable, "%s%s", _PATH_OBJDIRPREFIX, curdir); 1059 } 1060 1061 /* get rid of resource limit on file descriptors */ 1062 static void 1063 UnlimitFiles(void) 1064 { 1065 #if defined(MAKE_NATIVE) || (defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE)) 1066 struct rlimit rl; 1067 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 && 1068 rl.rlim_cur != rl.rlim_max) { 1069 rl.rlim_cur = rl.rlim_max; 1070 (void)setrlimit(RLIMIT_NOFILE, &rl); 1071 } 1072 #endif 1073 } 1074 1075 static void 1076 CmdOpts_Init(void) 1077 { 1078 opts.compatMake = false; 1079 memset(&opts.debug, 0, sizeof(opts.debug)); 1080 /* opts.debug_file has already been initialized earlier */ 1081 opts.strict = false; 1082 opts.debugVflag = false; 1083 opts.checkEnvFirst = false; 1084 Lst_Init(&opts.makefiles); 1085 opts.ignoreErrors = false; /* Pay attention to non-zero returns */ 1086 opts.maxJobs = 1; 1087 opts.keepgoing = false; /* Stop on error */ 1088 opts.noRecursiveExecute = false; /* Execute all .MAKE targets */ 1089 opts.noExecute = false; /* Execute all commands */ 1090 opts.query = false; 1091 opts.noBuiltins = false; /* Read the built-in rules */ 1092 opts.silent = false; /* Print commands as executed */ 1093 opts.touch = false; 1094 opts.printVars = PVM_NONE; 1095 Lst_Init(&opts.variables); 1096 opts.parseWarnFatal = false; 1097 opts.enterFlag = false; 1098 opts.varNoExportEnv = false; 1099 Lst_Init(&opts.create); 1100 } 1101 1102 /* 1103 * Initialize MAKE and .MAKE to the path of the executable, so that it can be 1104 * found by execvp(3) and the shells, even after a chdir. 1105 * 1106 * If it's a relative path and contains a '/', resolve it to an absolute path. 1107 * Otherwise keep it as is, assuming it will be found in the PATH. 1108 */ 1109 static void 1110 InitVarMake(const char *argv0) 1111 { 1112 const char *make = argv0; 1113 1114 if (argv0[0] != '/' && strchr(argv0, '/') != NULL) { 1115 char pathbuf[MAXPATHLEN]; 1116 const char *abspath = cached_realpath(argv0, pathbuf); 1117 struct stat st; 1118 if (abspath != NULL && abspath[0] == '/' && 1119 stat(make, &st) == 0) 1120 make = abspath; 1121 } 1122 1123 Global_Set("MAKE", make); 1124 Global_Set(".MAKE", make); 1125 } 1126 1127 /* 1128 * Add the directories from the colon-separated syspath to defSysIncPath. 1129 * After returning, the contents of syspath is unspecified. 1130 */ 1131 static void 1132 InitDefSysIncPath(char *syspath) 1133 { 1134 static char defsyspath[] = _PATH_DEFSYSPATH; 1135 char *start, *cp; 1136 1137 /* 1138 * If no user-supplied system path was given (through the -m option) 1139 * add the directories from the DEFSYSPATH (more than one may be given 1140 * as dir1:...:dirn) to the system include path. 1141 */ 1142 if (syspath == NULL || syspath[0] == '\0') 1143 syspath = defsyspath; 1144 else 1145 syspath = bmake_strdup(syspath); 1146 1147 for (start = syspath; *start != '\0'; start = cp) { 1148 for (cp = start; *cp != '\0' && *cp != ':'; cp++) 1149 continue; 1150 if (*cp == ':') 1151 *cp++ = '\0'; 1152 1153 /* look for magic parent directory search string */ 1154 if (strncmp(start, ".../", 4) == 0) { 1155 char *dir = Dir_FindHereOrAbove(curdir, start + 4); 1156 if (dir != NULL) { 1157 (void)SearchPath_Add(defSysIncPath, dir); 1158 free(dir); 1159 } 1160 } else { 1161 (void)SearchPath_Add(defSysIncPath, start); 1162 } 1163 } 1164 1165 if (syspath != defsyspath) 1166 free(syspath); 1167 } 1168 1169 static void 1170 ReadBuiltinRules(void) 1171 { 1172 StringListNode *ln; 1173 StringList sysMkFiles = LST_INIT; 1174 1175 SearchPath_Expand( 1176 Lst_IsEmpty(&sysIncPath->dirs) ? defSysIncPath : sysIncPath, 1177 _PATH_DEFSYSMK, 1178 &sysMkFiles); 1179 if (Lst_IsEmpty(&sysMkFiles)) 1180 Fatal("%s: no system rules (%s).", progname, _PATH_DEFSYSMK); 1181 1182 for (ln = sysMkFiles.first; ln != NULL; ln = ln->next) 1183 if (ReadMakefile(ln->datum)) 1184 break; 1185 1186 if (ln == NULL) 1187 Fatal("%s: cannot open %s.", 1188 progname, (const char *)sysMkFiles.first->datum); 1189 1190 Lst_DoneCall(&sysMkFiles, free); 1191 } 1192 1193 static void 1194 InitMaxJobs(void) 1195 { 1196 char *value; 1197 int n; 1198 1199 if (forceJobs || opts.compatMake || 1200 !Var_Exists(SCOPE_GLOBAL, ".MAKE.JOBS")) 1201 return; 1202 1203 (void)Var_Subst("${.MAKE.JOBS}", SCOPE_GLOBAL, VARE_WANTRES, &value); 1204 /* TODO: handle errors */ 1205 n = (int)strtol(value, NULL, 0); 1206 if (n < 1) { 1207 (void)fprintf(stderr, 1208 "%s: illegal value for .MAKE.JOBS " 1209 "-- must be positive integer!\n", 1210 progname); 1211 exit(2); /* Not 1 so -q can distinguish error */ 1212 } 1213 1214 if (n != opts.maxJobs) { 1215 Global_Append(MAKEFLAGS, "-j"); 1216 Global_Append(MAKEFLAGS, value); 1217 } 1218 1219 opts.maxJobs = n; 1220 maxJobTokens = opts.maxJobs; 1221 forceJobs = true; 1222 free(value); 1223 } 1224 1225 /* 1226 * For compatibility, look at the directories in the VPATH variable 1227 * and add them to the search path, if the variable is defined. The 1228 * variable's value is in the same format as the PATH environment 1229 * variable, i.e. <directory>:<directory>:<directory>... 1230 */ 1231 static void 1232 InitVpath(void) 1233 { 1234 char *vpath, savec, *path; 1235 if (!Var_Exists(SCOPE_CMDLINE, "VPATH")) 1236 return; 1237 1238 (void)Var_Subst("${VPATH}", SCOPE_CMDLINE, VARE_WANTRES, &vpath); 1239 /* TODO: handle errors */ 1240 path = vpath; 1241 do { 1242 char *cp; 1243 /* skip to end of directory */ 1244 for (cp = path; *cp != ':' && *cp != '\0'; cp++) 1245 continue; 1246 /* Save terminator character so know when to stop */ 1247 savec = *cp; 1248 *cp = '\0'; 1249 /* Add directory to search path */ 1250 (void)SearchPath_Add(&dirSearchPath, path); 1251 *cp = savec; 1252 path = cp + 1; 1253 } while (savec == ':'); 1254 free(vpath); 1255 } 1256 1257 static void 1258 ReadAllMakefiles(const StringList *makefiles) 1259 { 1260 StringListNode *ln; 1261 1262 for (ln = makefiles->first; ln != NULL; ln = ln->next) { 1263 const char *fname = ln->datum; 1264 if (!ReadMakefile(fname)) 1265 Fatal("%s: cannot open %s.", progname, fname); 1266 } 1267 } 1268 1269 static void 1270 ReadFirstDefaultMakefile(void) 1271 { 1272 StringList makefiles = LST_INIT; 1273 StringListNode *ln; 1274 char *prefs; 1275 1276 (void)Var_Subst("${" MAKE_MAKEFILE_PREFERENCE "}", 1277 SCOPE_CMDLINE, VARE_WANTRES, &prefs); 1278 /* TODO: handle errors */ 1279 1280 (void)str2Lst_Append(&makefiles, prefs); 1281 1282 for (ln = makefiles.first; ln != NULL; ln = ln->next) 1283 if (ReadMakefile(ln->datum)) 1284 break; 1285 1286 Lst_Done(&makefiles); 1287 free(prefs); 1288 } 1289 1290 /* 1291 * Initialize variables such as MAKE, MACHINE, .MAKEFLAGS. 1292 * Initialize a few modules. 1293 * Parse the arguments from MAKEFLAGS and the command line. 1294 */ 1295 static void 1296 main_Init(int argc, char **argv) 1297 { 1298 struct stat sa; 1299 const char *machine; 1300 const char *machine_arch; 1301 char *syspath = getenv("MAKESYSPATH"); 1302 struct utsname utsname; 1303 1304 /* default to writing debug to stderr */ 1305 opts.debug_file = stderr; 1306 1307 Str_Intern_Init(); 1308 HashTable_Init(&cached_realpaths); 1309 1310 #ifdef SIGINFO 1311 (void)bmake_signal(SIGINFO, siginfo); 1312 #endif 1313 1314 InitRandom(); 1315 1316 progname = str_basename(argv[0]); 1317 1318 UnlimitFiles(); 1319 1320 if (uname(&utsname) == -1) { 1321 (void)fprintf(stderr, "%s: uname failed (%s).\n", progname, 1322 strerror(errno)); 1323 exit(2); 1324 } 1325 1326 /* 1327 * Get the name of this type of MACHINE from utsname 1328 * so we can share an executable for similar machines. 1329 * (i.e. m68k: amiga hp300, mac68k, sun3, ...) 1330 * 1331 * Note that both MACHINE and MACHINE_ARCH are decided at 1332 * run-time. 1333 */ 1334 machine = InitVarMachine(&utsname); 1335 machine_arch = InitVarMachineArch(); 1336 1337 myPid = getpid(); /* remember this for vFork() */ 1338 1339 /* 1340 * Just in case MAKEOBJDIR wants us to do something tricky. 1341 */ 1342 Targ_Init(); 1343 Var_Init(); 1344 Global_Set(".MAKE.OS", utsname.sysname); 1345 Global_Set("MACHINE", machine); 1346 Global_Set("MACHINE_ARCH", machine_arch); 1347 #ifdef MAKE_VERSION 1348 Global_Set("MAKE_VERSION", MAKE_VERSION); 1349 #endif 1350 Global_Set(".newline", "\n"); /* handy for :@ loops */ 1351 #ifndef MAKEFILE_PREFERENCE_LIST 1352 /* This is the traditional preference for makefiles. */ 1353 # define MAKEFILE_PREFERENCE_LIST "makefile Makefile" 1354 #endif 1355 Global_Set(MAKE_MAKEFILE_PREFERENCE, MAKEFILE_PREFERENCE_LIST); 1356 Global_Set(MAKE_DEPENDFILE, ".depend"); 1357 1358 CmdOpts_Init(); 1359 allPrecious = false; /* Remove targets when interrupted */ 1360 deleteOnError = false; /* Historical default behavior */ 1361 jobsRunning = false; 1362 1363 maxJobTokens = opts.maxJobs; 1364 ignorePWD = false; 1365 1366 /* 1367 * Initialize the parsing, directory and variable modules to prepare 1368 * for the reading of inclusion paths and variable settings on the 1369 * command line 1370 */ 1371 1372 /* 1373 * Initialize various variables. 1374 * MAKE also gets this name, for compatibility 1375 * .MAKEFLAGS gets set to the empty string just in case. 1376 * MFLAGS also gets initialized empty, for compatibility. 1377 */ 1378 Parse_Init(); 1379 InitVarMake(argv[0]); 1380 Global_Set(MAKEFLAGS, ""); 1381 Global_Set(MAKEOVERRIDES, ""); 1382 Global_Set("MFLAGS", ""); 1383 Global_Set(".ALLTARGETS", ""); 1384 Var_Set(SCOPE_CMDLINE, MAKE_LEVEL ".ENV", MAKE_LEVEL_ENV); 1385 1386 /* Set some other useful variables. */ 1387 { 1388 char buf[64], *ep = getenv(MAKE_LEVEL_ENV); 1389 1390 makelevel = ep != NULL && ep[0] != '\0' ? atoi(ep) : 0; 1391 if (makelevel < 0) 1392 makelevel = 0; 1393 snprintf(buf, sizeof buf, "%d", makelevel); 1394 Global_Set(MAKE_LEVEL, buf); 1395 snprintf(buf, sizeof buf, "%u", myPid); 1396 Global_Set(".MAKE.PID", buf); 1397 snprintf(buf, sizeof buf, "%u", getppid()); 1398 Global_Set(".MAKE.PPID", buf); 1399 snprintf(buf, sizeof buf, "%u", getuid()); 1400 Global_Set(".MAKE.UID", buf); 1401 snprintf(buf, sizeof buf, "%u", getgid()); 1402 Global_Set(".MAKE.GID", buf); 1403 } 1404 if (makelevel > 0) { 1405 char pn[1024]; 1406 snprintf(pn, sizeof pn, "%s[%d]", progname, makelevel); 1407 progname = bmake_strdup(pn); 1408 } 1409 1410 #ifdef USE_META 1411 meta_init(); 1412 #endif 1413 Dir_Init(); 1414 1415 #ifdef POSIX 1416 { 1417 char *makeflags = explode(getenv("MAKEFLAGS")); 1418 Main_ParseArgLine(makeflags); 1419 free(makeflags); 1420 } 1421 #else 1422 /* 1423 * First snag any flags out of the MAKE environment variable. 1424 * (Note this is *not* MAKEFLAGS since /bin/make uses that and it's 1425 * in a different format). 1426 */ 1427 Main_ParseArgLine(getenv("MAKE")); 1428 #endif 1429 1430 if (getcwd(curdir, MAXPATHLEN) == NULL) { 1431 (void)fprintf(stderr, "%s: getcwd: %s.\n", 1432 progname, strerror(errno)); 1433 exit(2); 1434 } 1435 1436 MainParseArgs(argc, argv); 1437 1438 if (opts.enterFlag) 1439 printf("%s: Entering directory `%s'\n", progname, curdir); 1440 1441 if (stat(curdir, &sa) == -1) { 1442 (void)fprintf(stderr, "%s: %s: %s.\n", 1443 progname, curdir, strerror(errno)); 1444 exit(2); 1445 } 1446 1447 #ifndef NO_PWD_OVERRIDE 1448 HandlePWD(&sa); 1449 #endif 1450 Global_Set(".CURDIR", curdir); 1451 1452 InitObjdir(machine, machine_arch); 1453 1454 Arch_Init(); 1455 Suff_Init(); 1456 Trace_Init(tracefile); 1457 1458 defaultNode = NULL; 1459 (void)time(&now); 1460 1461 Trace_Log(MAKESTART, NULL); 1462 1463 InitVarTargets(); 1464 1465 InitDefSysIncPath(syspath); 1466 } 1467 1468 /* 1469 * Read the system makefile followed by either makefile, Makefile or the 1470 * files given by the -f option. Exit on parse errors. 1471 */ 1472 static void 1473 main_ReadFiles(void) 1474 { 1475 1476 if (!opts.noBuiltins) 1477 ReadBuiltinRules(); 1478 1479 posix_state = PS_MAYBE_NEXT_LINE; 1480 if (!Lst_IsEmpty(&opts.makefiles)) 1481 ReadAllMakefiles(&opts.makefiles); 1482 else 1483 ReadFirstDefaultMakefile(); 1484 } 1485 1486 /* Compute the dependency graph. */ 1487 static void 1488 main_PrepareMaking(void) 1489 { 1490 /* In particular suppress .depend for '-r -V .OBJDIR -f /dev/null' */ 1491 if (!opts.noBuiltins || opts.printVars == PVM_NONE) { 1492 (void)Var_Subst("${.MAKE.DEPENDFILE}", 1493 SCOPE_CMDLINE, VARE_WANTRES, &makeDependfile); 1494 if (makeDependfile[0] != '\0') { 1495 /* TODO: handle errors */ 1496 doing_depend = true; 1497 (void)ReadMakefile(makeDependfile); 1498 doing_depend = false; 1499 } 1500 } 1501 1502 if (enterFlagObj) 1503 printf("%s: Entering directory `%s'\n", progname, objdir); 1504 1505 MakeMode(); 1506 1507 { 1508 FStr makeflags = Var_Value(SCOPE_GLOBAL, MAKEFLAGS); 1509 Global_Append("MFLAGS", makeflags.str); 1510 FStr_Done(&makeflags); 1511 } 1512 1513 InitMaxJobs(); 1514 1515 if (!opts.compatMake && !forceJobs) 1516 opts.compatMake = true; 1517 1518 if (!opts.compatMake) 1519 Job_ServerStart(maxJobTokens, jp_0, jp_1); 1520 DEBUG5(JOB, "job_pipe %d %d, maxjobs %d, tokens %d, compat %d\n", 1521 jp_0, jp_1, opts.maxJobs, maxJobTokens, opts.compatMake ? 1 : 0); 1522 1523 if (opts.printVars == PVM_NONE) 1524 Main_ExportMAKEFLAGS(true); /* initial export */ 1525 1526 InitVpath(); 1527 1528 /* 1529 * Now that all search paths have been read for suffixes et al, it's 1530 * time to add the default search path to their lists... 1531 */ 1532 Suff_ExtendPaths(); 1533 1534 /* 1535 * Propagate attributes through :: dependency lists. 1536 */ 1537 Targ_Propagate(); 1538 1539 /* print the initial graph, if the user requested it */ 1540 if (DEBUG(GRAPH1)) 1541 Targ_PrintGraph(1); 1542 } 1543 1544 /* 1545 * Make the targets. 1546 * If the -v or -V options are given, print variables instead. 1547 * Return whether any of the targets is out-of-date. 1548 */ 1549 static bool 1550 main_Run(void) 1551 { 1552 if (opts.printVars != PVM_NONE) { 1553 /* print the values of any variables requested by the user */ 1554 doPrintVars(); 1555 return false; 1556 } else { 1557 return runTargets(); 1558 } 1559 } 1560 1561 /* Clean up after making the targets. */ 1562 static void 1563 main_CleanUp(void) 1564 { 1565 #ifdef CLEANUP 1566 Lst_DoneCall(&opts.variables, free); 1567 Lst_DoneCall(&opts.makefiles, free); 1568 Lst_DoneCall(&opts.create, free); 1569 #endif 1570 1571 if (DEBUG(GRAPH2)) 1572 Targ_PrintGraph(2); 1573 1574 Trace_Log(MAKEEND, NULL); 1575 1576 if (enterFlagObj) 1577 printf("%s: Leaving directory `%s'\n", progname, objdir); 1578 if (opts.enterFlag) 1579 printf("%s: Leaving directory `%s'\n", progname, curdir); 1580 1581 #ifdef USE_META 1582 meta_finish(); 1583 #endif 1584 Suff_End(); 1585 Targ_End(); 1586 Arch_End(); 1587 Var_End(); 1588 Parse_End(); 1589 Dir_End(); 1590 Job_End(); 1591 Trace_End(); 1592 Str_Intern_End(); 1593 } 1594 1595 /* Determine the exit code. */ 1596 static int 1597 main_Exit(bool outOfDate) 1598 { 1599 if (opts.strict && (main_errors > 0 || Parse_NumErrors() > 0)) 1600 return 2; /* Not 1 so -q can distinguish error */ 1601 return outOfDate ? 1 : 0; 1602 } 1603 1604 int 1605 main(int argc, char **argv) 1606 { 1607 bool outOfDate; 1608 1609 main_Init(argc, argv); 1610 main_ReadFiles(); 1611 main_PrepareMaking(); 1612 outOfDate = main_Run(); 1613 main_CleanUp(); 1614 return main_Exit(outOfDate); 1615 } 1616 1617 /* 1618 * Open and parse the given makefile, with all its side effects. 1619 * Return false if the file could not be opened. 1620 */ 1621 static bool 1622 ReadMakefile(const char *fname) 1623 { 1624 int fd; 1625 char *name, *path = NULL; 1626 1627 if (strcmp(fname, "-") == 0) { 1628 Parse_File("(stdin)", -1); 1629 Var_Set(SCOPE_INTERNAL, "MAKEFILE", ""); 1630 } else { 1631 /* if we've chdir'd, rebuild the path name */ 1632 if (strcmp(curdir, objdir) != 0 && *fname != '/') { 1633 path = str_concat3(curdir, "/", fname); 1634 fd = open(path, O_RDONLY); 1635 if (fd != -1) { 1636 fname = path; 1637 goto found; 1638 } 1639 free(path); 1640 1641 /* If curdir failed, try objdir (ala .depend) */ 1642 path = str_concat3(objdir, "/", fname); 1643 fd = open(path, O_RDONLY); 1644 if (fd != -1) { 1645 fname = path; 1646 goto found; 1647 } 1648 } else { 1649 fd = open(fname, O_RDONLY); 1650 if (fd != -1) 1651 goto found; 1652 } 1653 /* look in -I and system include directories. */ 1654 name = Dir_FindFile(fname, parseIncPath); 1655 if (name == NULL) { 1656 SearchPath *sysInc = Lst_IsEmpty(&sysIncPath->dirs) 1657 ? defSysIncPath : sysIncPath; 1658 name = Dir_FindFile(fname, sysInc); 1659 } 1660 if (name == NULL || (fd = open(name, O_RDONLY)) == -1) { 1661 free(name); 1662 free(path); 1663 return false; 1664 } 1665 fname = name; 1666 /* 1667 * set the MAKEFILE variable desired by System V fans -- the 1668 * placement of the setting here means it gets set to the last 1669 * makefile specified, as it is set by SysV make. 1670 */ 1671 found: 1672 if (!doing_depend) 1673 Var_Set(SCOPE_INTERNAL, "MAKEFILE", fname); 1674 Parse_File(fname, fd); 1675 } 1676 free(path); 1677 return true; 1678 } 1679 1680 /* 1681 * Execute the command in cmd, and return its output (only stdout, not 1682 * stderr, possibly empty). In the output, replace newlines with spaces. 1683 */ 1684 char * 1685 Cmd_Exec(const char *cmd, char **error) 1686 { 1687 const char *args[4]; /* Arguments for invoking the shell */ 1688 int pipefds[2]; 1689 int cpid; /* Child PID */ 1690 int pid; /* PID from wait() */ 1691 int status; /* command exit status */ 1692 Buffer buf; /* buffer to store the result */ 1693 ssize_t bytes_read; 1694 char *output; 1695 char *cp; 1696 int saved_errno; 1697 1698 if (shellName == NULL) 1699 Shell_Init(); 1700 1701 args[0] = shellName; 1702 args[1] = "-c"; 1703 args[2] = cmd; 1704 args[3] = NULL; 1705 DEBUG1(VAR, "Capturing the output of command \"%s\"\n", cmd); 1706 1707 if (pipe(pipefds) == -1) { 1708 *error = str_concat3( 1709 "Couldn't create pipe for \"", cmd, "\""); 1710 return bmake_strdup(""); 1711 } 1712 1713 Var_ReexportVars(); 1714 1715 switch (cpid = vfork()) { 1716 case 0: 1717 (void)close(pipefds[0]); 1718 (void)dup2(pipefds[1], STDOUT_FILENO); 1719 (void)close(pipefds[1]); 1720 1721 (void)execv(shellPath, UNCONST(args)); 1722 _exit(1); 1723 /* NOTREACHED */ 1724 1725 case -1: 1726 *error = str_concat3("Couldn't exec \"", cmd, "\""); 1727 return bmake_strdup(""); 1728 } 1729 1730 (void)close(pipefds[1]); /* No need for the writing half */ 1731 1732 saved_errno = 0; 1733 Buf_Init(&buf); 1734 1735 do { 1736 char result[BUFSIZ]; 1737 bytes_read = read(pipefds[0], result, sizeof result); 1738 if (bytes_read > 0) 1739 Buf_AddBytes(&buf, result, (size_t)bytes_read); 1740 } while (bytes_read > 0 || (bytes_read == -1 && errno == EINTR)); 1741 if (bytes_read == -1) 1742 saved_errno = errno; 1743 1744 (void)close(pipefds[0]); /* Close the input side of the pipe. */ 1745 1746 while ((pid = waitpid(cpid, &status, 0)) != cpid && pid >= 0) 1747 JobReapChild(pid, status, false); 1748 1749 if (Buf_EndsWith(&buf, '\n')) 1750 buf.data[buf.len - 1] = '\0'; 1751 1752 output = Buf_DoneData(&buf); 1753 for (cp = output; *cp != '\0'; cp++) 1754 if (*cp == '\n') 1755 *cp = ' '; 1756 1757 if (WIFSIGNALED(status)) 1758 *error = str_concat3("\"", cmd, "\" exited on a signal"); 1759 else if (WEXITSTATUS(status) != 0) 1760 *error = str_concat3( 1761 "\"", cmd, "\" returned non-zero status"); 1762 else if (saved_errno != 0) 1763 *error = str_concat3( 1764 "Couldn't read shell's output for \"", cmd, "\""); 1765 else 1766 *error = NULL; 1767 return output; 1768 } 1769 1770 /* 1771 * Print a printf-style error message. 1772 * 1773 * In default mode, this error message has no consequences, for compatibility 1774 * reasons, in particular it does not affect the exit status. Only in lint 1775 * mode (-dL) it does. 1776 */ 1777 void 1778 Error(const char *fmt, ...) 1779 { 1780 va_list ap; 1781 FILE *f; 1782 1783 f = opts.debug_file; 1784 if (f == stdout) 1785 f = stderr; 1786 (void)fflush(stdout); 1787 1788 for (;;) { 1789 fprintf(f, "%s: ", progname); 1790 va_start(ap, fmt); 1791 (void)vfprintf(f, fmt, ap); 1792 va_end(ap); 1793 (void)fprintf(f, "\n"); 1794 (void)fflush(f); 1795 if (f == stderr) 1796 break; 1797 f = stderr; 1798 } 1799 main_errors++; 1800 } 1801 1802 /* 1803 * Wait for any running jobs to finish, then produce an error message, 1804 * finally exit immediately. 1805 * 1806 * Exiting immediately differs from Parse_Error, which exits only after the 1807 * current top-level makefile has been parsed completely. 1808 */ 1809 void 1810 Fatal(const char *fmt, ...) 1811 { 1812 va_list ap; 1813 1814 if (jobsRunning) 1815 Job_Wait(); 1816 1817 (void)fflush(stdout); 1818 va_start(ap, fmt); 1819 (void)vfprintf(stderr, fmt, ap); 1820 va_end(ap); 1821 (void)fprintf(stderr, "\n"); 1822 (void)fflush(stderr); 1823 PrintStackTrace(true); 1824 1825 PrintOnError(NULL, "\n"); 1826 1827 if (DEBUG(GRAPH2) || DEBUG(GRAPH3)) 1828 Targ_PrintGraph(2); 1829 Trace_Log(MAKEERROR, NULL); 1830 exit(2); /* Not 1 so -q can distinguish error */ 1831 } 1832 1833 /* 1834 * Major exception once jobs are being created. 1835 * Kills all jobs, prints a message and exits. 1836 */ 1837 void 1838 Punt(const char *fmt, ...) 1839 { 1840 va_list ap; 1841 1842 (void)fflush(stdout); 1843 (void)fprintf(stderr, "%s: ", progname); 1844 va_start(ap, fmt); 1845 (void)vfprintf(stderr, fmt, ap); 1846 va_end(ap); 1847 (void)fprintf(stderr, "\n"); 1848 (void)fflush(stderr); 1849 1850 PrintOnError(NULL, "\n"); 1851 1852 DieHorribly(); 1853 } 1854 1855 /* Exit without giving a message. */ 1856 void 1857 DieHorribly(void) 1858 { 1859 if (jobsRunning) 1860 Job_AbortAll(); 1861 if (DEBUG(GRAPH2)) 1862 Targ_PrintGraph(2); 1863 Trace_Log(MAKEERROR, NULL); 1864 exit(2); /* Not 1 so -q can distinguish error */ 1865 } 1866 1867 /* 1868 * Called when aborting due to errors in child shell to signal abnormal exit. 1869 * The program exits. 1870 * Errors is the number of errors encountered in Make_Make. 1871 */ 1872 void 1873 Finish(int errs) 1874 { 1875 if (shouldDieQuietly(NULL, -1)) 1876 exit(2); 1877 Fatal("%d error%s", errs, errs == 1 ? "" : "s"); 1878 } 1879 1880 bool 1881 unlink_file(const char *file) 1882 { 1883 struct stat st; 1884 1885 if (lstat(file, &st) == -1) 1886 return false; 1887 1888 if (S_ISDIR(st.st_mode)) { 1889 errno = EISDIR; 1890 return false; 1891 } 1892 return unlink(file) == 0; 1893 } 1894 1895 static void 1896 write_all(int fd, const void *data, size_t n) 1897 { 1898 const char *mem = data; 1899 1900 while (n > 0) { 1901 ssize_t written = write(fd, mem, n); 1902 /* XXX: Should this EAGAIN be EINTR? */ 1903 if (written == -1 && errno == EAGAIN) 1904 continue; 1905 if (written == -1) 1906 break; 1907 mem += written; 1908 n -= (size_t)written; 1909 } 1910 } 1911 1912 /* Print why exec failed, avoiding stdio. */ 1913 void MAKE_ATTR_DEAD 1914 execDie(const char *af, const char *av) 1915 { 1916 Buffer buf; 1917 1918 Buf_Init(&buf); 1919 Buf_AddStr(&buf, progname); 1920 Buf_AddStr(&buf, ": "); 1921 Buf_AddStr(&buf, af); 1922 Buf_AddStr(&buf, "("); 1923 Buf_AddStr(&buf, av); 1924 Buf_AddStr(&buf, ") failed ("); 1925 Buf_AddStr(&buf, strerror(errno)); 1926 Buf_AddStr(&buf, ")\n"); 1927 1928 write_all(STDERR_FILENO, buf.data, buf.len); 1929 1930 Buf_Done(&buf); 1931 _exit(1); 1932 } 1933 1934 static void 1935 purge_relative_cached_realpaths(void) 1936 { 1937 HashEntry *he, *nhe; 1938 HashIter hi; 1939 1940 HashIter_Init(&hi, &cached_realpaths); 1941 he = HashIter_Next(&hi); 1942 while (he != NULL) { 1943 nhe = HashIter_Next(&hi); 1944 if (he->key[0] != '/') { 1945 DEBUG1(DIR, "cached_realpath: purging %s\n", he->key); 1946 HashTable_DeleteEntry(&cached_realpaths, he); 1947 /* 1948 * XXX: What about the allocated he->value? Either 1949 * free them or document why they cannot be freed. 1950 */ 1951 } 1952 he = nhe; 1953 } 1954 } 1955 1956 const char * 1957 cached_realpath(const char *pathname, char *resolved) 1958 { 1959 const char *rp; 1960 1961 if (pathname == NULL || pathname[0] == '\0') 1962 return NULL; 1963 1964 rp = HashTable_FindValue(&cached_realpaths, pathname); 1965 if (rp != NULL) { 1966 /* a hit */ 1967 strncpy(resolved, rp, MAXPATHLEN); 1968 resolved[MAXPATHLEN - 1] = '\0'; 1969 return resolved; 1970 } 1971 1972 rp = realpath(pathname, resolved); 1973 if (rp != NULL) { 1974 HashTable_Set(&cached_realpaths, pathname, bmake_strdup(rp)); 1975 DEBUG2(DIR, "cached_realpath: %s -> %s\n", pathname, rp); 1976 return resolved; 1977 } 1978 1979 /* should we negative-cache? */ 1980 return NULL; 1981 } 1982 1983 /* 1984 * Return true if we should die without noise. 1985 * For example our failing child was a sub-make or failure happened elsewhere. 1986 */ 1987 bool 1988 shouldDieQuietly(GNode *gn, int bf) 1989 { 1990 static int quietly = -1; 1991 1992 if (quietly < 0) { 1993 if (DEBUG(JOB) || 1994 !GetBooleanExpr("${.MAKE.DIE_QUIETLY}", true)) 1995 quietly = 0; 1996 else if (bf >= 0) 1997 quietly = bf; 1998 else 1999 quietly = (gn != NULL && (gn->type & OP_MAKE)) ? 1 : 0; 2000 } 2001 return quietly != 0; 2002 } 2003 2004 static void 2005 SetErrorVars(GNode *gn) 2006 { 2007 StringListNode *ln; 2008 2009 /* 2010 * We can print this even if there is no .ERROR target. 2011 */ 2012 Global_Set(".ERROR_TARGET", gn->name); 2013 Global_Delete(".ERROR_CMD"); 2014 2015 for (ln = gn->commands.first; ln != NULL; ln = ln->next) { 2016 const char *cmd = ln->datum; 2017 2018 if (cmd == NULL) 2019 break; 2020 Global_Append(".ERROR_CMD", cmd); 2021 } 2022 } 2023 2024 /* 2025 * Print some helpful information in case of an error. 2026 * The caller should exit soon after calling this function. 2027 */ 2028 void 2029 PrintOnError(GNode *gn, const char *msg) 2030 { 2031 static GNode *errorNode = NULL; 2032 2033 if (DEBUG(HASH)) { 2034 Targ_Stats(); 2035 Var_Stats(); 2036 } 2037 2038 if (errorNode != NULL) 2039 return; /* we've been here! */ 2040 2041 printf("%s%s: stopped in %s\n", msg, progname, curdir); 2042 2043 /* we generally want to keep quiet if a sub-make died */ 2044 if (shouldDieQuietly(gn, -1)) 2045 return; 2046 2047 if (gn != NULL) 2048 SetErrorVars(gn); 2049 2050 { 2051 char *errorVarsValues; 2052 (void)Var_Subst("${MAKE_PRINT_VAR_ON_ERROR:@v@$v='${$v}'\n@}", 2053 SCOPE_GLOBAL, VARE_WANTRES, &errorVarsValues); 2054 /* TODO: handle errors */ 2055 printf("%s", errorVarsValues); 2056 free(errorVarsValues); 2057 } 2058 2059 fflush(stdout); 2060 2061 /* 2062 * Finally, see if there is a .ERROR target, and run it if so. 2063 */ 2064 errorNode = Targ_FindNode(".ERROR"); 2065 if (errorNode != NULL) { 2066 errorNode->type |= OP_SPECIAL; 2067 Compat_Make(errorNode, errorNode); 2068 } 2069 } 2070 2071 void 2072 Main_ExportMAKEFLAGS(bool first) 2073 { 2074 static bool once = true; 2075 char *flags; 2076 2077 if (once != first) 2078 return; 2079 once = false; 2080 2081 (void)Var_Subst( 2082 "${.MAKEFLAGS} ${.MAKEOVERRIDES:O:u:@v@$v=${$v:Q}@}", 2083 SCOPE_CMDLINE, VARE_WANTRES, &flags); 2084 /* TODO: handle errors */ 2085 if (flags[0] != '\0') { 2086 #ifdef POSIX 2087 setenv("MAKEFLAGS", flags, 1); 2088 #else 2089 setenv("MAKE", flags, 1); 2090 #endif 2091 } 2092 } 2093 2094 char * 2095 getTmpdir(void) 2096 { 2097 static char *tmpdir = NULL; 2098 struct stat st; 2099 2100 if (tmpdir != NULL) 2101 return tmpdir; 2102 2103 /* Honor $TMPDIR if it is valid, strip a trailing '/'. */ 2104 (void)Var_Subst("${TMPDIR:tA:U" _PATH_TMP ":S,/$,,W}/", 2105 SCOPE_GLOBAL, VARE_WANTRES, &tmpdir); 2106 /* TODO: handle errors */ 2107 2108 if (stat(tmpdir, &st) < 0 || !S_ISDIR(st.st_mode)) { 2109 free(tmpdir); 2110 tmpdir = bmake_strdup(_PATH_TMP); 2111 } 2112 return tmpdir; 2113 } 2114 2115 /* 2116 * Create and open a temp file using "pattern". 2117 * If out_fname is provided, set it to a copy of the filename created. 2118 * Otherwise unlink the file once open. 2119 */ 2120 int 2121 mkTempFile(const char *pattern, char *tfile, size_t tfile_sz) 2122 { 2123 static char *tmpdir = NULL; 2124 char tbuf[MAXPATHLEN]; 2125 int fd; 2126 2127 if (pattern == NULL) 2128 pattern = TMPPAT; 2129 if (tmpdir == NULL) 2130 tmpdir = getTmpdir(); 2131 if (tfile == NULL) { 2132 tfile = tbuf; 2133 tfile_sz = sizeof tbuf; 2134 } 2135 2136 if (pattern[0] == '/') 2137 snprintf(tfile, tfile_sz, "%s", pattern); 2138 else 2139 snprintf(tfile, tfile_sz, "%s%s", tmpdir, pattern); 2140 2141 if ((fd = mkstemp(tfile)) < 0) 2142 Punt("Could not create temporary file %s: %s", tfile, 2143 strerror(errno)); 2144 if (tfile == tbuf) 2145 unlink(tfile); /* we just want the descriptor */ 2146 2147 return fd; 2148 } 2149 2150 /* 2151 * Convert a string representation of a boolean into a boolean value. 2152 * Anything that looks like "No", "False", "Off", "0" etc. is false, 2153 * the empty string is the fallback, everything else is true. 2154 */ 2155 bool 2156 ParseBoolean(const char *s, bool fallback) 2157 { 2158 char ch = ch_tolower(s[0]); 2159 if (ch == '\0') 2160 return fallback; 2161 if (ch == '0' || ch == 'f' || ch == 'n') 2162 return false; 2163 if (ch == 'o') 2164 return ch_tolower(s[1]) != 'f'; 2165 return true; 2166 } 2167
Indexes created Mon Sep 22 13:09:51 GMT 2025