main.c revision 1.578
1 /* $NetBSD: main.c,v 1.578 2022/02/09 20:52:06 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 1.578 2022/02/09 20:52:06 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 Var_SetExpand(SCOPE_GLOBAL, 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 Var_Expand(&path, SCOPE_GLOBAL, VARE_WANTRES); 747 748 (void)Main_SetObjdir(writable, "%s%s", path.str, suffix); 749 750 FStr_Done(&path); 751 return true; 752 } 753 754 /* 755 * Splits str into words, adding them to the list. 756 * The string must be kept alive as long as the list. 757 */ 758 int 759 str2Lst_Append(StringList *lp, char *str) 760 { 761 char *cp; 762 int n; 763 764 const char *sep = " \t"; 765 766 for (n = 0, cp = strtok(str, sep); cp != NULL; cp = strtok(NULL, sep)) { 767 Lst_Append(lp, cp); 768 n++; 769 } 770 return n; 771 } 772 773 #ifdef SIGINFO 774 /*ARGSUSED*/ 775 static void 776 siginfo(int signo MAKE_ATTR_UNUSED) 777 { 778 char dir[MAXPATHLEN]; 779 char str[2 * MAXPATHLEN]; 780 int len; 781 if (getcwd(dir, sizeof dir) == NULL) 782 return; 783 len = snprintf(str, sizeof str, "%s: Working in: %s\n", progname, dir); 784 if (len > 0) 785 (void)write(STDERR_FILENO, str, (size_t)len); 786 } 787 #endif 788 789 /* Allow makefiles some control over the mode we run in. */ 790 static void 791 MakeMode(void) 792 { 793 char *mode; 794 795 (void)Var_Subst("${" MAKE_MODE ":tl}", SCOPE_GLOBAL, VARE_WANTRES, &mode); 796 /* TODO: handle errors */ 797 798 if (mode[0] != '\0') { 799 if (strstr(mode, "compat") != NULL) { 800 opts.compatMake = true; 801 forceJobs = false; 802 } 803 #if USE_META 804 if (strstr(mode, "meta") != NULL) 805 meta_mode_init(mode); 806 #endif 807 } 808 809 free(mode); 810 } 811 812 static void 813 PrintVar(const char *varname, bool expandVars) 814 { 815 if (strchr(varname, '$') != NULL) { 816 char *evalue; 817 (void)Var_Subst(varname, SCOPE_GLOBAL, VARE_WANTRES, &evalue); 818 /* TODO: handle errors */ 819 printf("%s\n", evalue); 820 free(evalue); 821 822 } else if (expandVars) { 823 char *expr = str_concat3("${", varname, "}"); 824 char *evalue; 825 (void)Var_Subst(expr, SCOPE_GLOBAL, VARE_WANTRES, &evalue); 826 /* TODO: handle errors */ 827 free(expr); 828 printf("%s\n", evalue); 829 free(evalue); 830 831 } else { 832 FStr value = Var_Value(SCOPE_GLOBAL, varname); 833 printf("%s\n", value.str != NULL ? value.str : ""); 834 FStr_Done(&value); 835 } 836 } 837 838 /* 839 * Return a bool based on a variable. 840 * 841 * If the knob is not set, return the fallback. 842 * If set, anything that looks or smells like "No", "False", "Off", "0", etc. 843 * is false, otherwise true. 844 */ 845 bool 846 GetBooleanExpr(const char *expr, bool fallback) 847 { 848 char *value; 849 bool res; 850 851 (void)Var_Subst(expr, SCOPE_GLOBAL, VARE_WANTRES, &value); 852 /* TODO: handle errors */ 853 res = ParseBoolean(value, fallback); 854 free(value); 855 return res; 856 } 857 858 static void 859 doPrintVars(void) 860 { 861 StringListNode *ln; 862 bool expandVars; 863 864 if (opts.printVars == PVM_EXPANDED) 865 expandVars = true; 866 else if (opts.debugVflag) 867 expandVars = false; 868 else 869 expandVars = GetBooleanExpr("${.MAKE.EXPAND_VARIABLES}", 870 false); 871 872 for (ln = opts.variables.first; ln != NULL; ln = ln->next) { 873 const char *varname = ln->datum; 874 PrintVar(varname, expandVars); 875 } 876 } 877 878 static bool 879 runTargets(void) 880 { 881 GNodeList targs = LST_INIT; /* target nodes to create */ 882 bool outOfDate; /* false if all targets up to date */ 883 884 /* 885 * Have now read the entire graph and need to make a list of 886 * targets to create. If none was given on the command line, 887 * we consult the parsing module to find the main target(s) 888 * to create. 889 */ 890 if (Lst_IsEmpty(&opts.create)) 891 Parse_MainName(&targs); 892 else 893 Targ_FindList(&targs, &opts.create); 894 895 if (!opts.compatMake) { 896 /* 897 * Initialize job module before traversing the graph 898 * now that any .BEGIN and .END targets have been read. 899 * This is done only if the -q flag wasn't given 900 * (to prevent the .BEGIN from being executed should 901 * it exist). 902 */ 903 if (!opts.query) { 904 Job_Init(); 905 jobsRunning = true; 906 } 907 908 /* Traverse the graph, checking on all the targets */ 909 outOfDate = Make_Run(&targs); 910 } else { 911 /* 912 * Compat_Init will take care of creating all the 913 * targets as well as initializing the module. 914 */ 915 Compat_Run(&targs); 916 outOfDate = false; 917 } 918 Lst_Done(&targs); /* Don't free the targets themselves. */ 919 return outOfDate; 920 } 921 922 /* 923 * Set up the .TARGETS variable to contain the list of targets to be created. 924 * If none specified, make the variable empty for now, the parser will fill 925 * in the default or .MAIN target later. 926 */ 927 static void 928 InitVarTargets(void) 929 { 930 StringListNode *ln; 931 932 if (Lst_IsEmpty(&opts.create)) { 933 Global_Set(".TARGETS", ""); 934 return; 935 } 936 937 for (ln = opts.create.first; ln != NULL; ln = ln->next) { 938 const char *name = ln->datum; 939 Global_Append(".TARGETS", name); 940 } 941 } 942 943 static void 944 InitRandom(void) 945 { 946 struct timeval tv; 947 948 gettimeofday(&tv, NULL); 949 srandom((unsigned int)(tv.tv_sec + tv.tv_usec)); 950 } 951 952 static const char * 953 InitVarMachine(const struct utsname *utsname MAKE_ATTR_UNUSED) 954 { 955 const char *machine = getenv("MACHINE"); 956 if (machine != NULL) 957 return machine; 958 959 #if defined(MAKE_NATIVE) 960 return utsname->machine; 961 #elif defined(MAKE_MACHINE) 962 return MAKE_MACHINE; 963 #else 964 return "unknown"; 965 #endif 966 } 967 968 static const char * 969 InitVarMachineArch(void) 970 { 971 const char *env = getenv("MACHINE_ARCH"); 972 if (env != NULL) 973 return env; 974 975 #ifdef MAKE_NATIVE 976 { 977 struct utsname utsname; 978 static char machine_arch_buf[sizeof utsname.machine]; 979 const int mib[2] = { CTL_HW, HW_MACHINE_ARCH }; 980 size_t len = sizeof machine_arch_buf; 981 982 if (sysctl(mib, (unsigned int)__arraycount(mib), 983 machine_arch_buf, &len, NULL, 0) < 0) { 984 (void)fprintf(stderr, "%s: sysctl failed (%s).\n", 985 progname, strerror(errno)); 986 exit(2); 987 } 988 989 return machine_arch_buf; 990 } 991 #elif defined(MACHINE_ARCH) 992 return MACHINE_ARCH; 993 #elif defined(MAKE_MACHINE_ARCH) 994 return MAKE_MACHINE_ARCH; 995 #else 996 return "unknown"; 997 #endif 998 } 999 1000 #ifndef NO_PWD_OVERRIDE 1001 /* 1002 * All this code is so that we know where we are when we start up 1003 * on a different machine with pmake. 1004 * 1005 * XXX: Make no longer has "local" and "remote" mode. Is this code still 1006 * necessary? 1007 * 1008 * Overriding getcwd() with $PWD totally breaks MAKEOBJDIRPREFIX 1009 * since the value of curdir can vary depending on how we got 1010 * here. Ie sitting at a shell prompt (shell that provides $PWD) 1011 * or via subdir.mk in which case its likely a shell which does 1012 * not provide it. 1013 * 1014 * So, to stop it breaking this case only, we ignore PWD if 1015 * MAKEOBJDIRPREFIX is set or MAKEOBJDIR contains a variable expression. 1016 */ 1017 static void 1018 HandlePWD(const struct stat *curdir_st) 1019 { 1020 char *pwd; 1021 FStr makeobjdir; 1022 struct stat pwd_st; 1023 1024 if (ignorePWD || (pwd = getenv("PWD")) == NULL) 1025 return; 1026 1027 if (Var_Exists(SCOPE_CMDLINE, "MAKEOBJDIRPREFIX")) 1028 return; 1029 1030 makeobjdir = Var_Value(SCOPE_CMDLINE, "MAKEOBJDIR"); 1031 if (makeobjdir.str != NULL && strchr(makeobjdir.str, '$') != NULL) 1032 goto ignore_pwd; 1033 1034 if (stat(pwd, &pwd_st) == 0 && 1035 curdir_st->st_ino == pwd_st.st_ino && 1036 curdir_st->st_dev == pwd_st.st_dev) 1037 (void)strncpy(curdir, pwd, MAXPATHLEN); 1038 1039 ignore_pwd: 1040 FStr_Done(&makeobjdir); 1041 } 1042 #endif 1043 1044 /* 1045 * Find the .OBJDIR. If MAKEOBJDIRPREFIX, or failing that, MAKEOBJDIR is set 1046 * in the environment, try only that value and fall back to .CURDIR if it 1047 * does not exist. 1048 * 1049 * Otherwise, try _PATH_OBJDIR.MACHINE-MACHINE_ARCH, _PATH_OBJDIR.MACHINE, 1050 * and finally _PATH_OBJDIRPREFIX`pwd`, in that order. If none of these 1051 * paths exist, just use .CURDIR. 1052 */ 1053 static void 1054 InitObjdir(const char *machine, const char *machine_arch) 1055 { 1056 bool writable; 1057 1058 Dir_InitCur(curdir); 1059 writable = GetBooleanExpr("${MAKE_OBJDIR_CHECK_WRITABLE}", true); 1060 (void)Main_SetObjdir(false, "%s", curdir); 1061 1062 if (!SetVarObjdir(writable, "MAKEOBJDIRPREFIX", curdir) && 1063 !SetVarObjdir(writable, "MAKEOBJDIR", "") && 1064 !Main_SetObjdir(writable, "%s.%s-%s", _PATH_OBJDIR, machine, machine_arch) && 1065 !Main_SetObjdir(writable, "%s.%s", _PATH_OBJDIR, machine) && 1066 !Main_SetObjdir(writable, "%s", _PATH_OBJDIR)) 1067 (void)Main_SetObjdir(writable, "%s%s", _PATH_OBJDIRPREFIX, curdir); 1068 } 1069 1070 /* get rid of resource limit on file descriptors */ 1071 static void 1072 UnlimitFiles(void) 1073 { 1074 #if defined(MAKE_NATIVE) || (defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE)) 1075 struct rlimit rl; 1076 if (getrlimit(RLIMIT_NOFILE, &rl) != -1 && 1077 rl.rlim_cur != rl.rlim_max) { 1078 rl.rlim_cur = rl.rlim_max; 1079 (void)setrlimit(RLIMIT_NOFILE, &rl); 1080 } 1081 #endif 1082 } 1083 1084 static void 1085 CmdOpts_Init(void) 1086 { 1087 opts.compatMake = false; 1088 memset(&opts.debug, 0, sizeof(opts.debug)); 1089 /* opts.debug_file has already been initialized earlier */ 1090 opts.strict = false; 1091 opts.debugVflag = false; 1092 opts.checkEnvFirst = false; 1093 Lst_Init(&opts.makefiles); 1094 opts.ignoreErrors = false; /* Pay attention to non-zero returns */ 1095 opts.maxJobs = 1; 1096 opts.keepgoing = false; /* Stop on error */ 1097 opts.noRecursiveExecute = false; /* Execute all .MAKE targets */ 1098 opts.noExecute = false; /* Execute all commands */ 1099 opts.query = false; 1100 opts.noBuiltins = false; /* Read the built-in rules */ 1101 opts.silent = false; /* Print commands as executed */ 1102 opts.touch = false; 1103 opts.printVars = PVM_NONE; 1104 Lst_Init(&opts.variables); 1105 opts.parseWarnFatal = false; 1106 opts.enterFlag = false; 1107 opts.varNoExportEnv = false; 1108 Lst_Init(&opts.create); 1109 } 1110 1111 /* 1112 * Initialize MAKE and .MAKE to the path of the executable, so that it can be 1113 * found by execvp(3) and the shells, even after a chdir. 1114 * 1115 * If it's a relative path and contains a '/', resolve it to an absolute path. 1116 * Otherwise keep it as is, assuming it will be found in the PATH. 1117 */ 1118 static void 1119 InitVarMake(const char *argv0) 1120 { 1121 const char *make = argv0; 1122 1123 if (argv0[0] != '/' && strchr(argv0, '/') != NULL) { 1124 char pathbuf[MAXPATHLEN]; 1125 const char *abspath = cached_realpath(argv0, pathbuf); 1126 struct stat st; 1127 if (abspath != NULL && abspath[0] == '/' && 1128 stat(make, &st) == 0) 1129 make = abspath; 1130 } 1131 1132 Global_Set("MAKE", make); 1133 Global_Set(".MAKE", make); 1134 } 1135 1136 /* 1137 * Add the directories from the colon-separated syspath to defSysIncPath. 1138 * After returning, the contents of syspath is unspecified. 1139 */ 1140 static void 1141 InitDefSysIncPath(char *syspath) 1142 { 1143 static char defsyspath[] = _PATH_DEFSYSPATH; 1144 char *start, *cp; 1145 1146 /* 1147 * If no user-supplied system path was given (through the -m option) 1148 * add the directories from the DEFSYSPATH (more than one may be given 1149 * as dir1:...:dirn) to the system include path. 1150 */ 1151 if (syspath == NULL || syspath[0] == '\0') 1152 syspath = defsyspath; 1153 else 1154 syspath = bmake_strdup(syspath); 1155 1156 for (start = syspath; *start != '\0'; start = cp) { 1157 for (cp = start; *cp != '\0' && *cp != ':'; cp++) 1158 continue; 1159 if (*cp == ':') 1160 *cp++ = '\0'; 1161 1162 /* look for magic parent directory search string */ 1163 if (strncmp(start, ".../", 4) == 0) { 1164 char *dir = Dir_FindHereOrAbove(curdir, start + 4); 1165 if (dir != NULL) { 1166 (void)SearchPath_Add(defSysIncPath, dir); 1167 free(dir); 1168 } 1169 } else { 1170 (void)SearchPath_Add(defSysIncPath, start); 1171 } 1172 } 1173 1174 if (syspath != defsyspath) 1175 free(syspath); 1176 } 1177 1178 static void 1179 ReadBuiltinRules(void) 1180 { 1181 StringListNode *ln; 1182 StringList sysMkFiles = LST_INIT; 1183 1184 SearchPath_Expand( 1185 Lst_IsEmpty(&sysIncPath->dirs) ? defSysIncPath : sysIncPath, 1186 _PATH_DEFSYSMK, 1187 &sysMkFiles); 1188 if (Lst_IsEmpty(&sysMkFiles)) 1189 Fatal("%s: no system rules (%s).", progname, _PATH_DEFSYSMK); 1190 1191 for (ln = sysMkFiles.first; ln != NULL; ln = ln->next) 1192 if (ReadMakefile(ln->datum)) 1193 break; 1194 1195 if (ln == NULL) 1196 Fatal("%s: cannot open %s.", 1197 progname, (const char *)sysMkFiles.first->datum); 1198 1199 Lst_DoneCall(&sysMkFiles, free); 1200 } 1201 1202 static void 1203 InitMaxJobs(void) 1204 { 1205 char *value; 1206 int n; 1207 1208 if (forceJobs || opts.compatMake || 1209 !Var_Exists(SCOPE_GLOBAL, ".MAKE.JOBS")) 1210 return; 1211 1212 (void)Var_Subst("${.MAKE.JOBS}", SCOPE_GLOBAL, VARE_WANTRES, &value); 1213 /* TODO: handle errors */ 1214 n = (int)strtol(value, NULL, 0); 1215 if (n < 1) { 1216 (void)fprintf(stderr, 1217 "%s: illegal value for .MAKE.JOBS " 1218 "-- must be positive integer!\n", 1219 progname); 1220 exit(2); /* Not 1 so -q can distinguish error */ 1221 } 1222 1223 if (n != opts.maxJobs) { 1224 Global_Append(MAKEFLAGS, "-j"); 1225 Global_Append(MAKEFLAGS, value); 1226 } 1227 1228 opts.maxJobs = n; 1229 maxJobTokens = opts.maxJobs; 1230 forceJobs = true; 1231 free(value); 1232 } 1233 1234 /* 1235 * For compatibility, look at the directories in the VPATH variable 1236 * and add them to the search path, if the variable is defined. The 1237 * variable's value is in the same format as the PATH environment 1238 * variable, i.e. <directory>:<directory>:<directory>... 1239 */ 1240 static void 1241 InitVpath(void) 1242 { 1243 char *vpath, savec, *path; 1244 if (!Var_Exists(SCOPE_CMDLINE, "VPATH")) 1245 return; 1246 1247 (void)Var_Subst("${VPATH}", SCOPE_CMDLINE, VARE_WANTRES, &vpath); 1248 /* TODO: handle errors */ 1249 path = vpath; 1250 do { 1251 char *cp; 1252 /* skip to end of directory */ 1253 for (cp = path; *cp != ':' && *cp != '\0'; cp++) 1254 continue; 1255 /* Save terminator character so know when to stop */ 1256 savec = *cp; 1257 *cp = '\0'; 1258 /* Add directory to search path */ 1259 (void)SearchPath_Add(&dirSearchPath, path); 1260 *cp = savec; 1261 path = cp + 1; 1262 } while (savec == ':'); 1263 free(vpath); 1264 } 1265 1266 static void 1267 ReadAllMakefiles(const StringList *makefiles) 1268 { 1269 StringListNode *ln; 1270 1271 for (ln = makefiles->first; ln != NULL; ln = ln->next) { 1272 const char *fname = ln->datum; 1273 if (!ReadMakefile(fname)) 1274 Fatal("%s: cannot open %s.", progname, fname); 1275 } 1276 } 1277 1278 static void 1279 ReadFirstDefaultMakefile(void) 1280 { 1281 StringList makefiles = LST_INIT; 1282 StringListNode *ln; 1283 char *prefs; 1284 1285 (void)Var_Subst("${" MAKE_MAKEFILE_PREFERENCE "}", 1286 SCOPE_CMDLINE, VARE_WANTRES, &prefs); 1287 /* TODO: handle errors */ 1288 1289 (void)str2Lst_Append(&makefiles, prefs); 1290 1291 for (ln = makefiles.first; ln != NULL; ln = ln->next) 1292 if (ReadMakefile(ln->datum)) 1293 break; 1294 1295 Lst_Done(&makefiles); 1296 free(prefs); 1297 } 1298 1299 /* 1300 * Initialize variables such as MAKE, MACHINE, .MAKEFLAGS. 1301 * Initialize a few modules. 1302 * Parse the arguments from MAKEFLAGS and the command line. 1303 */ 1304 static void 1305 main_Init(int argc, char **argv) 1306 { 1307 struct stat sa; 1308 const char *machine; 1309 const char *machine_arch; 1310 char *syspath = getenv("MAKESYSPATH"); 1311 struct utsname utsname; 1312 1313 /* default to writing debug to stderr */ 1314 opts.debug_file = stderr; 1315 1316 Str_Intern_Init(); 1317 HashTable_Init(&cached_realpaths); 1318 1319 #ifdef SIGINFO 1320 (void)bmake_signal(SIGINFO, siginfo); 1321 #endif 1322 1323 InitRandom(); 1324 1325 progname = str_basename(argv[0]); 1326 1327 UnlimitFiles(); 1328 1329 if (uname(&utsname) == -1) { 1330 (void)fprintf(stderr, "%s: uname failed (%s).\n", progname, 1331 strerror(errno)); 1332 exit(2); 1333 } 1334 1335 /* 1336 * Get the name of this type of MACHINE from utsname 1337 * so we can share an executable for similar machines. 1338 * (i.e. m68k: amiga hp300, mac68k, sun3, ...) 1339 * 1340 * Note that both MACHINE and MACHINE_ARCH are decided at 1341 * run-time. 1342 */ 1343 machine = InitVarMachine(&utsname); 1344 machine_arch = InitVarMachineArch(); 1345 1346 myPid = getpid(); /* remember this for vFork() */ 1347 1348 /* 1349 * Just in case MAKEOBJDIR wants us to do something tricky. 1350 */ 1351 Targ_Init(); 1352 Var_Init(); 1353 Global_Set(".MAKE.OS", utsname.sysname); 1354 Global_Set("MACHINE", machine); 1355 Global_Set("MACHINE_ARCH", machine_arch); 1356 #ifdef MAKE_VERSION 1357 Global_Set("MAKE_VERSION", MAKE_VERSION); 1358 #endif 1359 Global_Set(".newline", "\n"); /* handy for :@ loops */ 1360 #ifndef MAKEFILE_PREFERENCE_LIST 1361 /* This is the traditional preference for makefiles. */ 1362 # define MAKEFILE_PREFERENCE_LIST "makefile Makefile" 1363 #endif 1364 Global_Set(MAKE_MAKEFILE_PREFERENCE, MAKEFILE_PREFERENCE_LIST); 1365 Global_Set(MAKE_DEPENDFILE, ".depend"); 1366 1367 CmdOpts_Init(); 1368 allPrecious = false; /* Remove targets when interrupted */ 1369 deleteOnError = false; /* Historical default behavior */ 1370 jobsRunning = false; 1371 1372 maxJobTokens = opts.maxJobs; 1373 ignorePWD = false; 1374 1375 /* 1376 * Initialize the parsing, directory and variable modules to prepare 1377 * for the reading of inclusion paths and variable settings on the 1378 * command line 1379 */ 1380 1381 /* 1382 * Initialize various variables. 1383 * MAKE also gets this name, for compatibility 1384 * .MAKEFLAGS gets set to the empty string just in case. 1385 * MFLAGS also gets initialized empty, for compatibility. 1386 */ 1387 Parse_Init(); 1388 InitVarMake(argv[0]); 1389 Global_Set(MAKEFLAGS, ""); 1390 Global_Set(MAKEOVERRIDES, ""); 1391 Global_Set("MFLAGS", ""); 1392 Global_Set(".ALLTARGETS", ""); 1393 Var_Set(SCOPE_CMDLINE, MAKE_LEVEL ".ENV", MAKE_LEVEL_ENV); 1394 1395 /* Set some other useful variables. */ 1396 { 1397 char buf[64], *ep = getenv(MAKE_LEVEL_ENV); 1398 1399 makelevel = ep != NULL && ep[0] != '\0' ? atoi(ep) : 0; 1400 if (makelevel < 0) 1401 makelevel = 0; 1402 snprintf(buf, sizeof buf, "%d", makelevel); 1403 Global_Set(MAKE_LEVEL, buf); 1404 snprintf(buf, sizeof buf, "%u", myPid); 1405 Global_Set(".MAKE.PID", buf); 1406 snprintf(buf, sizeof buf, "%u", getppid()); 1407 Global_Set(".MAKE.PPID", buf); 1408 snprintf(buf, sizeof buf, "%u", getuid()); 1409 Global_Set(".MAKE.UID", buf); 1410 snprintf(buf, sizeof buf, "%u", getgid()); 1411 Global_Set(".MAKE.GID", buf); 1412 } 1413 if (makelevel > 0) { 1414 char pn[1024]; 1415 snprintf(pn, sizeof pn, "%s[%d]", progname, makelevel); 1416 progname = bmake_strdup(pn); 1417 } 1418 1419 #ifdef USE_META 1420 meta_init(); 1421 #endif 1422 Dir_Init(); 1423 1424 #ifdef POSIX 1425 { 1426 char *makeflags = explode(getenv("MAKEFLAGS")); 1427 Main_ParseArgLine(makeflags); 1428 free(makeflags); 1429 } 1430 #else 1431 /* 1432 * First snag any flags out of the MAKE environment variable. 1433 * (Note this is *not* MAKEFLAGS since /bin/make uses that and it's 1434 * in a different format). 1435 */ 1436 Main_ParseArgLine(getenv("MAKE")); 1437 #endif 1438 1439 if (getcwd(curdir, MAXPATHLEN) == NULL) { 1440 (void)fprintf(stderr, "%s: getcwd: %s.\n", 1441 progname, strerror(errno)); 1442 exit(2); 1443 } 1444 1445 MainParseArgs(argc, argv); 1446 1447 if (opts.enterFlag) 1448 printf("%s: Entering directory `%s'\n", progname, curdir); 1449 1450 if (stat(curdir, &sa) == -1) { 1451 (void)fprintf(stderr, "%s: %s: %s.\n", 1452 progname, curdir, strerror(errno)); 1453 exit(2); 1454 } 1455 1456 #ifndef NO_PWD_OVERRIDE 1457 HandlePWD(&sa); 1458 #endif 1459 Global_Set(".CURDIR", curdir); 1460 1461 InitObjdir(machine, machine_arch); 1462 1463 Arch_Init(); 1464 Suff_Init(); 1465 Trace_Init(tracefile); 1466 1467 defaultNode = NULL; 1468 (void)time(&now); 1469 1470 Trace_Log(MAKESTART, NULL); 1471 1472 InitVarTargets(); 1473 1474 InitDefSysIncPath(syspath); 1475 } 1476 1477 /* 1478 * Read the system makefile followed by either makefile, Makefile or the 1479 * files given by the -f option. Exit on parse errors. 1480 */ 1481 static void 1482 main_ReadFiles(void) 1483 { 1484 1485 if (!opts.noBuiltins) 1486 ReadBuiltinRules(); 1487 1488 if (!Lst_IsEmpty(&opts.makefiles)) 1489 ReadAllMakefiles(&opts.makefiles); 1490 else 1491 ReadFirstDefaultMakefile(); 1492 } 1493 1494 /* Compute the dependency graph. */ 1495 static void 1496 main_PrepareMaking(void) 1497 { 1498 /* In particular suppress .depend for '-r -V .OBJDIR -f /dev/null' */ 1499 if (!opts.noBuiltins || opts.printVars == PVM_NONE) { 1500 (void)Var_Subst("${.MAKE.DEPENDFILE}", 1501 SCOPE_CMDLINE, VARE_WANTRES, &makeDependfile); 1502 if (makeDependfile[0] != '\0') { 1503 /* TODO: handle errors */ 1504 doing_depend = true; 1505 (void)ReadMakefile(makeDependfile); 1506 doing_depend = false; 1507 } 1508 } 1509 1510 if (enterFlagObj) 1511 printf("%s: Entering directory `%s'\n", progname, objdir); 1512 1513 MakeMode(); 1514 1515 { 1516 FStr makeflags = Var_Value(SCOPE_GLOBAL, MAKEFLAGS); 1517 Global_Append("MFLAGS", makeflags.str); 1518 FStr_Done(&makeflags); 1519 } 1520 1521 InitMaxJobs(); 1522 1523 if (!opts.compatMake && !forceJobs) 1524 opts.compatMake = true; 1525 1526 if (!opts.compatMake) 1527 Job_ServerStart(maxJobTokens, jp_0, jp_1); 1528 DEBUG5(JOB, "job_pipe %d %d, maxjobs %d, tokens %d, compat %d\n", 1529 jp_0, jp_1, opts.maxJobs, maxJobTokens, opts.compatMake ? 1 : 0); 1530 1531 if (opts.printVars == PVM_NONE) 1532 Main_ExportMAKEFLAGS(true); /* initial export */ 1533 1534 InitVpath(); 1535 1536 /* 1537 * Now that all search paths have been read for suffixes et al, it's 1538 * time to add the default search path to their lists... 1539 */ 1540 Suff_ExtendPaths(); 1541 1542 /* 1543 * Propagate attributes through :: dependency lists. 1544 */ 1545 Targ_Propagate(); 1546 1547 /* print the initial graph, if the user requested it */ 1548 if (DEBUG(GRAPH1)) 1549 Targ_PrintGraph(1); 1550 } 1551 1552 /* 1553 * Make the targets. 1554 * If the -v or -V options are given, print variables instead. 1555 * Return whether any of the targets is out-of-date. 1556 */ 1557 static bool 1558 main_Run(void) 1559 { 1560 if (opts.printVars != PVM_NONE) { 1561 /* print the values of any variables requested by the user */ 1562 doPrintVars(); 1563 return false; 1564 } else { 1565 return runTargets(); 1566 } 1567 } 1568 1569 /* Clean up after making the targets. */ 1570 static void 1571 main_CleanUp(void) 1572 { 1573 #ifdef CLEANUP 1574 Lst_DoneCall(&opts.variables, free); 1575 Lst_DoneCall(&opts.makefiles, free); 1576 Lst_DoneCall(&opts.create, free); 1577 #endif 1578 1579 if (DEBUG(GRAPH2)) 1580 Targ_PrintGraph(2); 1581 1582 Trace_Log(MAKEEND, NULL); 1583 1584 if (enterFlagObj) 1585 printf("%s: Leaving directory `%s'\n", progname, objdir); 1586 if (opts.enterFlag) 1587 printf("%s: Leaving directory `%s'\n", progname, curdir); 1588 1589 #ifdef USE_META 1590 meta_finish(); 1591 #endif 1592 Suff_End(); 1593 Targ_End(); 1594 Arch_End(); 1595 Var_End(); 1596 Parse_End(); 1597 Dir_End(); 1598 Job_End(); 1599 Trace_End(); 1600 Str_Intern_End(); 1601 } 1602 1603 /* Determine the exit code. */ 1604 static int 1605 main_Exit(bool outOfDate) 1606 { 1607 if (opts.strict && (main_errors > 0 || Parse_NumErrors() > 0)) 1608 return 2; /* Not 1 so -q can distinguish error */ 1609 return outOfDate ? 1 : 0; 1610 } 1611 1612 int 1613 main(int argc, char **argv) 1614 { 1615 bool outOfDate; 1616 1617 main_Init(argc, argv); 1618 main_ReadFiles(); 1619 main_PrepareMaking(); 1620 outOfDate = main_Run(); 1621 main_CleanUp(); 1622 return main_Exit(outOfDate); 1623 } 1624 1625 /* 1626 * Open and parse the given makefile, with all its side effects. 1627 * Return false if the file could not be opened. 1628 */ 1629 static bool 1630 ReadMakefile(const char *fname) 1631 { 1632 int fd; 1633 char *name, *path = NULL; 1634 1635 if (strcmp(fname, "-") == 0) { 1636 Parse_File("(stdin)", -1); 1637 Var_Set(SCOPE_INTERNAL, "MAKEFILE", ""); 1638 } else { 1639 /* if we've chdir'd, rebuild the path name */ 1640 if (strcmp(curdir, objdir) != 0 && *fname != '/') { 1641 path = str_concat3(curdir, "/", fname); 1642 fd = open(path, O_RDONLY); 1643 if (fd != -1) { 1644 fname = path; 1645 goto found; 1646 } 1647 free(path); 1648 1649 /* If curdir failed, try objdir (ala .depend) */ 1650 path = str_concat3(objdir, "/", fname); 1651 fd = open(path, O_RDONLY); 1652 if (fd != -1) { 1653 fname = path; 1654 goto found; 1655 } 1656 } else { 1657 fd = open(fname, O_RDONLY); 1658 if (fd != -1) 1659 goto found; 1660 } 1661 /* look in -I and system include directories. */ 1662 name = Dir_FindFile(fname, parseIncPath); 1663 if (name == NULL) { 1664 SearchPath *sysInc = Lst_IsEmpty(&sysIncPath->dirs) 1665 ? defSysIncPath : sysIncPath; 1666 name = Dir_FindFile(fname, sysInc); 1667 } 1668 if (name == NULL || (fd = open(name, O_RDONLY)) == -1) { 1669 free(name); 1670 free(path); 1671 return false; 1672 } 1673 fname = name; 1674 /* 1675 * set the MAKEFILE variable desired by System V fans -- the 1676 * placement of the setting here means it gets set to the last 1677 * makefile specified, as it is set by SysV make. 1678 */ 1679 found: 1680 if (!doing_depend) 1681 Var_Set(SCOPE_INTERNAL, "MAKEFILE", fname); 1682 Parse_File(fname, fd); 1683 } 1684 free(path); 1685 return true; 1686 } 1687 1688 /* 1689 * Execute the command in cmd, and return its output (only stdout, not 1690 * stderr, possibly empty). In the output, replace newlines with spaces. 1691 */ 1692 char * 1693 Cmd_Exec(const char *cmd, char **error) 1694 { 1695 const char *args[4]; /* Arguments for invoking the shell */ 1696 int pipefds[2]; 1697 int cpid; /* Child PID */ 1698 int pid; /* PID from wait() */ 1699 int status; /* command exit status */ 1700 Buffer buf; /* buffer to store the result */ 1701 ssize_t bytes_read; 1702 char *output; 1703 char *cp; 1704 int saved_errno; 1705 1706 if (shellName == NULL) 1707 Shell_Init(); 1708 1709 args[0] = shellName; 1710 args[1] = "-c"; 1711 args[2] = cmd; 1712 args[3] = NULL; 1713 DEBUG1(VAR, "Capturing the output of command \"%s\"\n", cmd); 1714 1715 if (pipe(pipefds) == -1) { 1716 *error = str_concat3( 1717 "Couldn't create pipe for \"", cmd, "\""); 1718 return bmake_strdup(""); 1719 } 1720 1721 Var_ReexportVars(); 1722 1723 switch (cpid = vfork()) { 1724 case 0: 1725 (void)close(pipefds[0]); 1726 (void)dup2(pipefds[1], STDOUT_FILENO); 1727 (void)close(pipefds[1]); 1728 1729 (void)execv(shellPath, UNCONST(args)); 1730 _exit(1); 1731 /* NOTREACHED */ 1732 1733 case -1: 1734 *error = str_concat3("Couldn't exec \"", cmd, "\""); 1735 return bmake_strdup(""); 1736 } 1737 1738 (void)close(pipefds[1]); /* No need for the writing half */ 1739 1740 saved_errno = 0; 1741 Buf_Init(&buf); 1742 1743 do { 1744 char result[BUFSIZ]; 1745 bytes_read = read(pipefds[0], result, sizeof result); 1746 if (bytes_read > 0) 1747 Buf_AddBytes(&buf, result, (size_t)bytes_read); 1748 } while (bytes_read > 0 || (bytes_read == -1 && errno == EINTR)); 1749 if (bytes_read == -1) 1750 saved_errno = errno; 1751 1752 (void)close(pipefds[0]); /* Close the input side of the pipe. */ 1753 1754 while ((pid = waitpid(cpid, &status, 0)) != cpid && pid >= 0) 1755 JobReapChild(pid, status, false); 1756 1757 if (Buf_EndsWith(&buf, '\n')) 1758 buf.data[buf.len - 1] = '\0'; 1759 1760 output = Buf_DoneData(&buf); 1761 for (cp = output; *cp != '\0'; cp++) 1762 if (*cp == '\n') 1763 *cp = ' '; 1764 1765 if (WIFSIGNALED(status)) 1766 *error = str_concat3("\"", cmd, "\" exited on a signal"); 1767 else if (WEXITSTATUS(status) != 0) 1768 *error = str_concat3( 1769 "\"", cmd, "\" returned non-zero status"); 1770 else if (saved_errno != 0) 1771 *error = str_concat3( 1772 "Couldn't read shell's output for \"", cmd, "\""); 1773 else 1774 *error = NULL; 1775 return output; 1776 } 1777 1778 /* 1779 * Print a printf-style error message. 1780 * 1781 * In default mode, this error message has no consequences, for compatibility 1782 * reasons, in particular it does not affect the exit status. Only in lint 1783 * mode (-dL) it does. 1784 */ 1785 void 1786 Error(const char *fmt, ...) 1787 { 1788 va_list ap; 1789 FILE *f; 1790 1791 f = opts.debug_file; 1792 if (f == stdout) 1793 f = stderr; 1794 (void)fflush(stdout); 1795 1796 for (;;) { 1797 fprintf(f, "%s: ", progname); 1798 va_start(ap, fmt); 1799 (void)vfprintf(f, fmt, ap); 1800 va_end(ap); 1801 (void)fprintf(f, "\n"); 1802 (void)fflush(f); 1803 if (f == stderr) 1804 break; 1805 f = stderr; 1806 } 1807 main_errors++; 1808 } 1809 1810 /* 1811 * Wait for any running jobs to finish, then produce an error message, 1812 * finally exit immediately. 1813 * 1814 * Exiting immediately differs from Parse_Error, which exits only after the 1815 * current top-level makefile has been parsed completely. 1816 */ 1817 void 1818 Fatal(const char *fmt, ...) 1819 { 1820 va_list ap; 1821 1822 if (jobsRunning) 1823 Job_Wait(); 1824 1825 (void)fflush(stdout); 1826 va_start(ap, fmt); 1827 (void)vfprintf(stderr, fmt, ap); 1828 va_end(ap); 1829 (void)fprintf(stderr, "\n"); 1830 (void)fflush(stderr); 1831 PrintStackTrace(true); 1832 1833 PrintOnError(NULL, "\n"); 1834 1835 if (DEBUG(GRAPH2) || DEBUG(GRAPH3)) 1836 Targ_PrintGraph(2); 1837 Trace_Log(MAKEERROR, NULL); 1838 exit(2); /* Not 1 so -q can distinguish error */ 1839 } 1840 1841 /* 1842 * Major exception once jobs are being created. 1843 * Kills all jobs, prints a message and exits. 1844 */ 1845 void 1846 Punt(const char *fmt, ...) 1847 { 1848 va_list ap; 1849 1850 (void)fflush(stdout); 1851 (void)fprintf(stderr, "%s: ", progname); 1852 va_start(ap, fmt); 1853 (void)vfprintf(stderr, fmt, ap); 1854 va_end(ap); 1855 (void)fprintf(stderr, "\n"); 1856 (void)fflush(stderr); 1857 1858 PrintOnError(NULL, "\n"); 1859 1860 DieHorribly(); 1861 } 1862 1863 /* Exit without giving a message. */ 1864 void 1865 DieHorribly(void) 1866 { 1867 if (jobsRunning) 1868 Job_AbortAll(); 1869 if (DEBUG(GRAPH2)) 1870 Targ_PrintGraph(2); 1871 Trace_Log(MAKEERROR, NULL); 1872 exit(2); /* Not 1 so -q can distinguish error */ 1873 } 1874 1875 /* 1876 * Called when aborting due to errors in child shell to signal abnormal exit. 1877 * The program exits. 1878 * Errors is the number of errors encountered in Make_Make. 1879 */ 1880 void 1881 Finish(int errs) 1882 { 1883 if (shouldDieQuietly(NULL, -1)) 1884 exit(2); 1885 Fatal("%d error%s", errs, errs == 1 ? "" : "s"); 1886 } 1887 1888 bool 1889 unlink_file(const char *file) 1890 { 1891 struct stat st; 1892 1893 if (lstat(file, &st) == -1) 1894 return false; 1895 1896 if (S_ISDIR(st.st_mode)) { 1897 errno = EISDIR; 1898 return false; 1899 } 1900 return unlink(file) == 0; 1901 } 1902 1903 static void 1904 write_all(int fd, const void *data, size_t n) 1905 { 1906 const char *mem = data; 1907 1908 while (n > 0) { 1909 ssize_t written = write(fd, mem, n); 1910 /* XXX: Should this EAGAIN be EINTR? */ 1911 if (written == -1 && errno == EAGAIN) 1912 continue; 1913 if (written == -1) 1914 break; 1915 mem += written; 1916 n -= (size_t)written; 1917 } 1918 } 1919 1920 /* Print why exec failed, avoiding stdio. */ 1921 void MAKE_ATTR_DEAD 1922 execDie(const char *af, const char *av) 1923 { 1924 Buffer buf; 1925 1926 Buf_Init(&buf); 1927 Buf_AddStr(&buf, progname); 1928 Buf_AddStr(&buf, ": "); 1929 Buf_AddStr(&buf, af); 1930 Buf_AddStr(&buf, "("); 1931 Buf_AddStr(&buf, av); 1932 Buf_AddStr(&buf, ") failed ("); 1933 Buf_AddStr(&buf, strerror(errno)); 1934 Buf_AddStr(&buf, ")\n"); 1935 1936 write_all(STDERR_FILENO, buf.data, buf.len); 1937 1938 Buf_Done(&buf); 1939 _exit(1); 1940 } 1941 1942 static void 1943 purge_relative_cached_realpaths(void) 1944 { 1945 HashEntry *he, *nhe; 1946 HashIter hi; 1947 1948 HashIter_Init(&hi, &cached_realpaths); 1949 he = HashIter_Next(&hi); 1950 while (he != NULL) { 1951 nhe = HashIter_Next(&hi); 1952 if (he->key[0] != '/') { 1953 DEBUG1(DIR, "cached_realpath: purging %s\n", he->key); 1954 HashTable_DeleteEntry(&cached_realpaths, he); 1955 /* 1956 * XXX: What about the allocated he->value? Either 1957 * free them or document why they cannot be freed. 1958 */ 1959 } 1960 he = nhe; 1961 } 1962 } 1963 1964 const char * 1965 cached_realpath(const char *pathname, char *resolved) 1966 { 1967 const char *rp; 1968 1969 if (pathname == NULL || pathname[0] == '\0') 1970 return NULL; 1971 1972 rp = HashTable_FindValue(&cached_realpaths, pathname); 1973 if (rp != NULL) { 1974 /* a hit */ 1975 strncpy(resolved, rp, MAXPATHLEN); 1976 resolved[MAXPATHLEN - 1] = '\0'; 1977 return resolved; 1978 } 1979 1980 rp = realpath(pathname, resolved); 1981 if (rp != NULL) { 1982 HashTable_Set(&cached_realpaths, pathname, bmake_strdup(rp)); 1983 DEBUG2(DIR, "cached_realpath: %s -> %s\n", pathname, rp); 1984 return resolved; 1985 } 1986 1987 /* should we negative-cache? */ 1988 return NULL; 1989 } 1990 1991 /* 1992 * Return true if we should die without noise. 1993 * For example our failing child was a sub-make or failure happened elsewhere. 1994 */ 1995 bool 1996 shouldDieQuietly(GNode *gn, int bf) 1997 { 1998 static int quietly = -1; 1999 2000 if (quietly < 0) { 2001 if (DEBUG(JOB) || 2002 !GetBooleanExpr("${.MAKE.DIE_QUIETLY}", true)) 2003 quietly = 0; 2004 else if (bf >= 0) 2005 quietly = bf; 2006 else 2007 quietly = (gn != NULL && (gn->type & OP_MAKE)) ? 1 : 0; 2008 } 2009 return quietly != 0; 2010 } 2011 2012 static void 2013 SetErrorVars(GNode *gn) 2014 { 2015 StringListNode *ln; 2016 2017 /* 2018 * We can print this even if there is no .ERROR target. 2019 */ 2020 Global_Set(".ERROR_TARGET", gn->name); 2021 Global_Delete(".ERROR_CMD"); 2022 2023 for (ln = gn->commands.first; ln != NULL; ln = ln->next) { 2024 const char *cmd = ln->datum; 2025 2026 if (cmd == NULL) 2027 break; 2028 Global_Append(".ERROR_CMD", cmd); 2029 } 2030 } 2031 2032 /* 2033 * Print some helpful information in case of an error. 2034 * The caller should exit soon after calling this function. 2035 */ 2036 void 2037 PrintOnError(GNode *gn, const char *msg) 2038 { 2039 static GNode *errorNode = NULL; 2040 2041 if (DEBUG(HASH)) { 2042 Targ_Stats(); 2043 Var_Stats(); 2044 } 2045 2046 if (errorNode != NULL) 2047 return; /* we've been here! */ 2048 2049 printf("%s%s: stopped in %s\n", msg, progname, curdir); 2050 2051 /* we generally want to keep quiet if a sub-make died */ 2052 if (shouldDieQuietly(gn, -1)) 2053 return; 2054 2055 if (gn != NULL) 2056 SetErrorVars(gn); 2057 2058 { 2059 char *errorVarsValues; 2060 (void)Var_Subst("${MAKE_PRINT_VAR_ON_ERROR:@v@$v='${$v}'\n@}", 2061 SCOPE_GLOBAL, VARE_WANTRES, &errorVarsValues); 2062 /* TODO: handle errors */ 2063 printf("%s", errorVarsValues); 2064 free(errorVarsValues); 2065 } 2066 2067 fflush(stdout); 2068 2069 /* 2070 * Finally, see if there is a .ERROR target, and run it if so. 2071 */ 2072 errorNode = Targ_FindNode(".ERROR"); 2073 if (errorNode != NULL) { 2074 errorNode->type |= OP_SPECIAL; 2075 Compat_Make(errorNode, errorNode); 2076 } 2077 } 2078 2079 void 2080 Main_ExportMAKEFLAGS(bool first) 2081 { 2082 static bool once = true; 2083 char *flags; 2084 2085 if (once != first) 2086 return; 2087 once = false; 2088 2089 (void)Var_Subst( 2090 "${.MAKEFLAGS} ${.MAKEOVERRIDES:O:u:@v@$v=${$v:Q}@}", 2091 SCOPE_CMDLINE, VARE_WANTRES, &flags); 2092 /* TODO: handle errors */ 2093 if (flags[0] != '\0') { 2094 #ifdef POSIX 2095 setenv("MAKEFLAGS", flags, 1); 2096 #else 2097 setenv("MAKE", flags, 1); 2098 #endif 2099 } 2100 } 2101 2102 char * 2103 getTmpdir(void) 2104 { 2105 static char *tmpdir = NULL; 2106 struct stat st; 2107 2108 if (tmpdir != NULL) 2109 return tmpdir; 2110 2111 /* Honor $TMPDIR if it is valid, strip a trailing '/'. */ 2112 (void)Var_Subst("${TMPDIR:tA:U" _PATH_TMP ":S,/$,,W}/", 2113 SCOPE_GLOBAL, VARE_WANTRES, &tmpdir); 2114 /* TODO: handle errors */ 2115 2116 if (stat(tmpdir, &st) < 0 || !S_ISDIR(st.st_mode)) { 2117 free(tmpdir); 2118 tmpdir = bmake_strdup(_PATH_TMP); 2119 } 2120 return tmpdir; 2121 } 2122 2123 /* 2124 * Create and open a temp file using "pattern". 2125 * If out_fname is provided, set it to a copy of the filename created. 2126 * Otherwise unlink the file once open. 2127 */ 2128 int 2129 mkTempFile(const char *pattern, char *tfile, size_t tfile_sz) 2130 { 2131 static char *tmpdir = NULL; 2132 char tbuf[MAXPATHLEN]; 2133 int fd; 2134 2135 if (pattern == NULL) 2136 pattern = TMPPAT; 2137 if (tmpdir == NULL) 2138 tmpdir = getTmpdir(); 2139 if (tfile == NULL) { 2140 tfile = tbuf; 2141 tfile_sz = sizeof tbuf; 2142 } 2143 2144 if (pattern[0] == '/') 2145 snprintf(tfile, tfile_sz, "%s", pattern); 2146 else 2147 snprintf(tfile, tfile_sz, "%s%s", tmpdir, pattern); 2148 2149 if ((fd = mkstemp(tfile)) < 0) 2150 Punt("Could not create temporary file %s: %s", tfile, 2151 strerror(errno)); 2152 if (tfile == tbuf) 2153 unlink(tfile); /* we just want the descriptor */ 2154 2155 return fd; 2156 } 2157 2158 /* 2159 * Convert a string representation of a boolean into a boolean value. 2160 * Anything that looks like "No", "False", "Off", "0" etc. is false, 2161 * the empty string is the fallback, everything else is true. 2162 */ 2163 bool 2164 ParseBoolean(const char *s, bool fallback) 2165 { 2166 char ch = ch_tolower(s[0]); 2167 if (ch == '\0') 2168 return fallback; 2169 if (ch == '0' || ch == 'f' || ch == 'n') 2170 return false; 2171 if (ch == 'o') 2172 return ch_tolower(s[1]) != 'f'; 2173 return true; 2174 } 2175
Indexes created Mon Sep 22 13:09:51 GMT 2025