1 /* $NetBSD: parse.c,v 1.275 2020/09/01 17:38:26 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 #ifndef MAKE_NATIVE 72 static char rcsid[] = "$NetBSD: parse.c,v 1.275 2020/09/01 17:38:26 rillig Exp $"; 73 #else 74 #include <sys/cdefs.h> 75 #ifndef lint 76 #if 0 77 static char sccsid[] = "@(#)parse.c 8.3 (Berkeley) 3/19/94"; 78 #else 79 __RCSID("$NetBSD: parse.c,v 1.275 2020/09/01 17:38:26 rillig Exp $"); 80 #endif 81 #endif /* not lint */ 82 #endif 83 84 /*- 85 * parse.c -- 86 * Functions to parse a makefile. 87 * 88 * One function, Parse_Init, must be called before any functions 89 * in this module are used. After that, the function Parse_File is the 90 * main entry point and controls most of the other functions in this 91 * module. 92 * 93 * Most important structures are kept in Lsts. Directories for 94 * the .include "..." function are kept in the 'parseIncPath' Lst, while 95 * those for the .include <...> are kept in the 'sysIncPath' Lst. The 96 * targets currently being defined are kept in the 'targets' Lst. 97 * 98 * The variables 'fname' and 'lineno' are used to track the name 99 * of the current file and the line number in that file so that error 100 * messages can be more meaningful. 101 * 102 * Interface: 103 * Parse_Init Initialization function which must be 104 * called before anything else in this module 105 * is used. 106 * 107 * Parse_End Cleanup the module 108 * 109 * Parse_File Function used to parse a makefile. It must 110 * be given the name of the file, which should 111 * already have been opened, and a function 112 * to call to read a character from the file. 113 * 114 * Parse_IsVar Returns TRUE if the given line is a 115 * variable assignment. Used by MainParseArgs 116 * to determine if an argument is a target 117 * or a variable assignment. Used internally 118 * for pretty much the same thing... 119 * 120 * Parse_Error Function called when an error occurs in 121 * parsing. Used by the variable and 122 * conditional modules. 123 * Parse_MainName Returns a Lst of the main target to create. 124 */ 125 126 #include <sys/types.h> 127 #include <sys/stat.h> 128 #include <errno.h> 129 #include <stdarg.h> 130 #include <stdio.h> 131 132 #include "make.h" 133 #include "dir.h" 134 #include "job.h" 135 #include "pathnames.h" 136 137 #ifdef HAVE_STDINT_H 138 #include <stdint.h> 139 #endif 140 141 #ifdef HAVE_MMAP 142 #include <sys/mman.h> 143 144 #ifndef MAP_COPY 145 #define MAP_COPY MAP_PRIVATE 146 #endif 147 #ifndef MAP_FILE 148 #define MAP_FILE 0 149 #endif 150 #endif 151 152 /* types and constants */ 153 154 /* 155 * Structure for a file being read ("included file") 156 */ 157 typedef struct IFile { 158 char *fname; /* name of file */ 159 int lineno; /* current line number in file */ 160 int first_lineno; /* line number of start of text */ 161 int cond_depth; /* 'if' nesting when file opened */ 162 Boolean depending; /* state of doing_depend on EOF */ 163 char *P_str; /* point to base of string buffer */ 164 char *P_ptr; /* point to next char of string buffer */ 165 char *P_end; /* point to the end of string buffer */ 166 char *(*nextbuf)(void *, size_t *); /* Function to get more data */ 167 void *nextbuf_arg; /* Opaque arg for nextbuf() */ 168 struct loadedfile *lf; /* loadedfile object, if any */ 169 } IFile; 170 171 172 /* 173 * These values are returned by ParseEOF to tell Parse_File whether to 174 * CONTINUE parsing, i.e. it had only reached the end of an include file, 175 * or if it's DONE. 176 */ 177 #define CONTINUE 1 178 #define DONE 0 179 180 /* 181 * Tokens for target attributes 182 */ 183 typedef enum { 184 Begin, /* .BEGIN */ 185 Default, /* .DEFAULT */ 186 DeleteOnError, /* .DELETE_ON_ERROR */ 187 End, /* .END */ 188 dotError, /* .ERROR */ 189 Ignore, /* .IGNORE */ 190 Includes, /* .INCLUDES */ 191 Interrupt, /* .INTERRUPT */ 192 Libs, /* .LIBS */ 193 Meta, /* .META */ 194 MFlags, /* .MFLAGS or .MAKEFLAGS */ 195 Main, /* .MAIN and we don't have anything user-specified to 196 * make */ 197 NoExport, /* .NOEXPORT */ 198 NoMeta, /* .NOMETA */ 199 NoMetaCmp, /* .NOMETA_CMP */ 200 NoPath, /* .NOPATH */ 201 Not, /* Not special */ 202 NotParallel, /* .NOTPARALLEL */ 203 Null, /* .NULL */ 204 ExObjdir, /* .OBJDIR */ 205 Order, /* .ORDER */ 206 Parallel, /* .PARALLEL */ 207 ExPath, /* .PATH */ 208 Phony, /* .PHONY */ 209 #ifdef POSIX 210 Posix, /* .POSIX */ 211 #endif 212 Precious, /* .PRECIOUS */ 213 ExShell, /* .SHELL */ 214 Silent, /* .SILENT */ 215 SingleShell, /* .SINGLESHELL */ 216 Stale, /* .STALE */ 217 Suffixes, /* .SUFFIXES */ 218 Wait, /* .WAIT */ 219 Attribute /* Generic attribute */ 220 } ParseSpecial; 221 222 /* 223 * Other tokens 224 */ 225 #define LPAREN '(' 226 #define RPAREN ')' 227 228 229 /* result data */ 230 231 /* 232 * The main target to create. This is the first target on the first 233 * dependency line in the first makefile. 234 */ 235 static GNode *mainNode; 236 237 /* eval state */ 238 239 /* targets we're working on */ 240 static Lst targets; 241 242 #ifdef CLEANUP 243 /* command lines for targets */ 244 static Lst targCmds; 245 #endif 246 247 /* 248 * specType contains the SPECial TYPE of the current target. It is 249 * Not if the target is unspecial. If it *is* special, however, the children 250 * are linked as children of the parent but not vice versa. This variable is 251 * set in ParseDoDependency 252 */ 253 static ParseSpecial specType; 254 255 /* 256 * Predecessor node for handling .ORDER. Initialized to NULL when .ORDER 257 * seen, then set to each successive source on the line. 258 */ 259 static GNode *predecessor; 260 261 /* parser state */ 262 263 /* true if currently in a dependency line or its commands */ 264 static Boolean inLine; 265 266 /* number of fatal errors */ 267 static int fatals = 0; 268 269 /* 270 * Variables for doing includes 271 */ 272 273 /* current file being read */ 274 static IFile *curFile; 275 276 /* stack of IFiles generated by .includes */ 277 static Lst includes; 278 279 /* include paths (lists of directories) */ 280 Lst parseIncPath; /* dirs for "..." includes */ 281 Lst sysIncPath; /* dirs for <...> includes */ 282 Lst defIncPath; /* default for sysIncPath */ 283 284 /* parser tables */ 285 286 /* 287 * The parseKeywords table is searched using binary search when deciding 288 * if a target or source is special. The 'spec' field is the ParseSpecial 289 * type of the keyword ("Not" if the keyword isn't special as a target) while 290 * the 'op' field is the operator to apply to the list of targets if the 291 * keyword is used as a source ("0" if the keyword isn't special as a source) 292 */ 293 static const struct { 294 const char *name; /* Name of keyword */ 295 ParseSpecial spec; /* Type when used as a target */ 296 int op; /* Operator when used as a source */ 297 } parseKeywords[] = { 298 { ".BEGIN", Begin, 0 }, 299 { ".DEFAULT", Default, 0 }, 300 { ".DELETE_ON_ERROR", DeleteOnError, 0 }, 301 { ".END", End, 0 }, 302 { ".ERROR", dotError, 0 }, 303 { ".EXEC", Attribute, OP_EXEC }, 304 { ".IGNORE", Ignore, OP_IGNORE }, 305 { ".INCLUDES", Includes, 0 }, 306 { ".INTERRUPT", Interrupt, 0 }, 307 { ".INVISIBLE", Attribute, OP_INVISIBLE }, 308 { ".JOIN", Attribute, OP_JOIN }, 309 { ".LIBS", Libs, 0 }, 310 { ".MADE", Attribute, OP_MADE }, 311 { ".MAIN", Main, 0 }, 312 { ".MAKE", Attribute, OP_MAKE }, 313 { ".MAKEFLAGS", MFlags, 0 }, 314 { ".META", Meta, OP_META }, 315 { ".MFLAGS", MFlags, 0 }, 316 { ".NOMETA", NoMeta, OP_NOMETA }, 317 { ".NOMETA_CMP", NoMetaCmp, OP_NOMETA_CMP }, 318 { ".NOPATH", NoPath, OP_NOPATH }, 319 { ".NOTMAIN", Attribute, OP_NOTMAIN }, 320 { ".NOTPARALLEL", NotParallel, 0 }, 321 { ".NO_PARALLEL", NotParallel, 0 }, 322 { ".NULL", Null, 0 }, 323 { ".OBJDIR", ExObjdir, 0 }, 324 { ".OPTIONAL", Attribute, OP_OPTIONAL }, 325 { ".ORDER", Order, 0 }, 326 { ".PARALLEL", Parallel, 0 }, 327 { ".PATH", ExPath, 0 }, 328 { ".PHONY", Phony, OP_PHONY }, 329 #ifdef POSIX 330 { ".POSIX", Posix, 0 }, 331 #endif 332 { ".PRECIOUS", Precious, OP_PRECIOUS }, 333 { ".RECURSIVE", Attribute, OP_MAKE }, 334 { ".SHELL", ExShell, 0 }, 335 { ".SILENT", Silent, OP_SILENT }, 336 { ".SINGLESHELL", SingleShell, 0 }, 337 { ".STALE", Stale, 0 }, 338 { ".SUFFIXES", Suffixes, 0 }, 339 { ".USE", Attribute, OP_USE }, 340 { ".USEBEFORE", Attribute, OP_USEBEFORE }, 341 { ".WAIT", Wait, 0 }, 342 }; 343 344 /* local functions */ 345 346 static int ParseIsEscaped(const char *, const char *); 347 static void ParseErrorInternal(const char *, size_t, int, const char *, ...) 348 MAKE_ATTR_PRINTFLIKE(4,5); 349 static void ParseVErrorInternal(FILE *, const char *, size_t, int, const char *, va_list) 350 MAKE_ATTR_PRINTFLIKE(5, 0); 351 static int ParseFindKeyword(const char *); 352 static int ParseLinkSrc(void *, void *); 353 static int ParseDoOp(void *, void *); 354 static void ParseDoSrc(int, const char *); 355 static int ParseFindMain(void *, void *); 356 static int ParseAddDir(void *, void *); 357 static int ParseClearPath(void *, void *); 358 static void ParseDoDependency(char *); 359 static int ParseAddCmd(void *, void *); 360 static void ParseHasCommands(void *); 361 static void ParseDoInclude(char *); 362 static void ParseSetParseFile(const char *); 363 static void ParseSetIncludedFile(void); 364 #ifdef GMAKEEXPORT 365 static void ParseGmakeExport(char *); 366 #endif 367 static int ParseEOF(void); 368 static char *ParseReadLine(void); 369 static void ParseFinishLine(void); 370 static void ParseMark(GNode *); 371 372 /* file loader */ 373 374 struct loadedfile { 375 const char *path; /* name, for error reports */ 376 char *buf; /* contents buffer */ 377 size_t len; /* length of contents */ 378 size_t maplen; /* length of mmap area, or 0 */ 379 Boolean used; /* XXX: have we used the data yet */ 380 }; 381 382 /* 383 * Constructor/destructor for loadedfile 384 */ 385 static struct loadedfile * 386 loadedfile_create(const char *path) 387 { 388 struct loadedfile *lf; 389 390 lf = bmake_malloc(sizeof(*lf)); 391 lf->path = path == NULL ? "(stdin)" : path; 392 lf->buf = NULL; 393 lf->len = 0; 394 lf->maplen = 0; 395 lf->used = FALSE; 396 return lf; 397 } 398 399 static void 400 loadedfile_destroy(struct loadedfile *lf) 401 { 402 if (lf->buf != NULL) { 403 if (lf->maplen > 0) { 404 #ifdef HAVE_MMAP 405 munmap(lf->buf, lf->maplen); 406 #endif 407 } else { 408 free(lf->buf); 409 } 410 } 411 free(lf); 412 } 413 414 /* 415 * nextbuf() operation for loadedfile, as needed by the weird and twisted 416 * logic below. Once that's cleaned up, we can get rid of lf->used... 417 */ 418 static char * 419 loadedfile_nextbuf(void *x, size_t *len) 420 { 421 struct loadedfile *lf = x; 422 423 if (lf->used) { 424 return NULL; 425 } 426 lf->used = TRUE; 427 *len = lf->len; 428 return lf->buf; 429 } 430 431 /* 432 * Try to get the size of a file. 433 */ 434 static Boolean 435 load_getsize(int fd, size_t *ret) 436 { 437 struct stat st; 438 439 if (fstat(fd, &st) < 0) { 440 return FALSE; 441 } 442 443 if (!S_ISREG(st.st_mode)) { 444 return FALSE; 445 } 446 447 /* 448 * st_size is an off_t, which is 64 bits signed; *ret is 449 * size_t, which might be 32 bits unsigned or 64 bits 450 * unsigned. Rather than being elaborate, just punt on 451 * files that are more than 2^31 bytes. We should never 452 * see a makefile that size in practice... 453 * 454 * While we're at it reject negative sizes too, just in case. 455 */ 456 if (st.st_size < 0 || st.st_size > 0x7fffffff) { 457 return FALSE; 458 } 459 460 *ret = (size_t) st.st_size; 461 return TRUE; 462 } 463 464 /* 465 * Read in a file. 466 * 467 * Until the path search logic can be moved under here instead of 468 * being in the caller in another source file, we need to have the fd 469 * passed in already open. Bleh. 470 * 471 * If the path is NULL use stdin and (to insure against fd leaks) 472 * assert that the caller passed in -1. 473 */ 474 static struct loadedfile * 475 loadfile(const char *path, int fd) 476 { 477 struct loadedfile *lf; 478 #ifdef HAVE_MMAP 479 static long pagesize = 0; 480 #endif 481 ssize_t result; 482 size_t bufpos; 483 484 lf = loadedfile_create(path); 485 486 if (path == NULL) { 487 assert(fd == -1); 488 fd = STDIN_FILENO; 489 } else { 490 #if 0 /* notyet */ 491 fd = open(path, O_RDONLY); 492 if (fd < 0) { 493 ... 494 Error("%s: %s", path, strerror(errno)); 495 exit(1); 496 } 497 #endif 498 } 499 500 #ifdef HAVE_MMAP 501 if (load_getsize(fd, &lf->len)) { 502 /* found a size, try mmap */ 503 #ifdef _SC_PAGESIZE 504 if (pagesize == 0) 505 pagesize = sysconf(_SC_PAGESIZE); 506 #endif 507 if (pagesize <= 0) { 508 pagesize = 0x1000; 509 } 510 /* round size up to a page */ 511 lf->maplen = pagesize * ((lf->len + pagesize - 1)/pagesize); 512 513 /* 514 * XXX hack for dealing with empty files; remove when 515 * we're no longer limited by interfacing to the old 516 * logic elsewhere in this file. 517 */ 518 if (lf->maplen == 0) { 519 lf->maplen = pagesize; 520 } 521 522 /* 523 * FUTURE: remove PROT_WRITE when the parser no longer 524 * needs to scribble on the input. 525 */ 526 lf->buf = mmap(NULL, lf->maplen, PROT_READ|PROT_WRITE, 527 MAP_FILE|MAP_COPY, fd, 0); 528 if (lf->buf != MAP_FAILED) { 529 /* succeeded */ 530 if (lf->len == lf->maplen && lf->buf[lf->len - 1] != '\n') { 531 char *b = bmake_malloc(lf->len + 1); 532 b[lf->len] = '\n'; 533 memcpy(b, lf->buf, lf->len++); 534 munmap(lf->buf, lf->maplen); 535 lf->maplen = 0; 536 lf->buf = b; 537 } 538 goto done; 539 } 540 } 541 #endif 542 /* cannot mmap; load the traditional way */ 543 544 lf->maplen = 0; 545 lf->len = 1024; 546 lf->buf = bmake_malloc(lf->len); 547 548 bufpos = 0; 549 while (1) { 550 assert(bufpos <= lf->len); 551 if (bufpos == lf->len) { 552 if (lf->len > SIZE_MAX/2) { 553 errno = EFBIG; 554 Error("%s: file too large", path); 555 exit(1); 556 } 557 lf->len *= 2; 558 lf->buf = bmake_realloc(lf->buf, lf->len); 559 } 560 assert(bufpos < lf->len); 561 result = read(fd, lf->buf + bufpos, lf->len - bufpos); 562 if (result < 0) { 563 Error("%s: read error: %s", path, strerror(errno)); 564 exit(1); 565 } 566 if (result == 0) { 567 break; 568 } 569 bufpos += result; 570 } 571 assert(bufpos <= lf->len); 572 lf->len = bufpos; 573 574 /* truncate malloc region to actual length (maybe not useful) */ 575 if (lf->len > 0) { 576 /* as for mmap case, ensure trailing \n */ 577 if (lf->buf[lf->len - 1] != '\n') 578 lf->len++; 579 lf->buf = bmake_realloc(lf->buf, lf->len); 580 lf->buf[lf->len - 1] = '\n'; 581 } 582 583 #ifdef HAVE_MMAP 584 done: 585 #endif 586 if (path != NULL) { 587 close(fd); 588 } 589 return lf; 590 } 591 592 /* old code */ 593 594 /*- 595 *---------------------------------------------------------------------- 596 * ParseIsEscaped -- 597 * Check if the current character is escaped on the current line 598 * 599 * Results: 600 * 0 if the character is not backslash escaped, 1 otherwise 601 * 602 * Side Effects: 603 * None 604 *---------------------------------------------------------------------- 605 */ 606 static int 607 ParseIsEscaped(const char *line, const char *c) 608 { 609 int active = 0; 610 for (;;) { 611 if (line == c) 612 return active; 613 if (*--c != '\\') 614 return active; 615 active = !active; 616 } 617 } 618 619 /*- 620 *---------------------------------------------------------------------- 621 * ParseFindKeyword -- 622 * Look in the table of keywords for one matching the given string. 623 * 624 * Input: 625 * str String to find 626 * 627 * Results: 628 * The index of the keyword, or -1 if it isn't there. 629 * 630 * Side Effects: 631 * None 632 *---------------------------------------------------------------------- 633 */ 634 static int 635 ParseFindKeyword(const char *str) 636 { 637 int start, end, cur; 638 int diff; 639 640 start = 0; 641 end = (sizeof(parseKeywords)/sizeof(parseKeywords[0])) - 1; 642 643 do { 644 cur = start + ((end - start) / 2); 645 diff = strcmp(str, parseKeywords[cur].name); 646 647 if (diff == 0) { 648 return cur; 649 } else if (diff < 0) { 650 end = cur - 1; 651 } else { 652 start = cur + 1; 653 } 654 } while (start <= end); 655 return -1; 656 } 657 658 /*- 659 * ParseVErrorInternal -- 660 * Error message abort function for parsing. Prints out the context 661 * of the error (line number and file) as well as the message with 662 * two optional arguments. 663 * 664 * Results: 665 * None 666 * 667 * Side Effects: 668 * "fatals" is incremented if the level is PARSE_FATAL. 669 */ 670 /* VARARGS */ 671 static void 672 ParseVErrorInternal(FILE *f, const char *cfname, size_t clineno, int type, 673 const char *fmt, va_list ap) 674 { 675 static Boolean fatal_warning_error_printed = FALSE; 676 char dirbuf[MAXPATHLEN+1]; 677 678 (void)fprintf(f, "%s: ", progname); 679 680 if (cfname != NULL) { 681 (void)fprintf(f, "\""); 682 if (*cfname != '/' && strcmp(cfname, "(stdin)") != 0) { 683 char *cp, *cp2; 684 const char *dir, *fname; 685 686 /* 687 * Nothing is more annoying than not knowing 688 * which Makefile is the culprit; we try ${.PARSEDIR} 689 * and apply realpath(3) if not absolute. 690 */ 691 dir = Var_Value(".PARSEDIR", VAR_GLOBAL, &cp); 692 if (dir == NULL) 693 dir = "."; 694 if (*dir != '/') { 695 dir = realpath(dir, dirbuf); 696 } 697 fname = Var_Value(".PARSEFILE", VAR_GLOBAL, &cp2); 698 if (fname == NULL) { 699 if ((fname = strrchr(cfname, '/'))) 700 fname++; 701 else 702 fname = cfname; 703 } 704 (void)fprintf(f, "%s/%s", dir, fname); 705 bmake_free(cp2); 706 bmake_free(cp); 707 } else 708 (void)fprintf(f, "%s", cfname); 709 710 (void)fprintf(f, "\" line %d: ", (int)clineno); 711 } 712 if (type == PARSE_WARNING) 713 (void)fprintf(f, "warning: "); 714 (void)vfprintf(f, fmt, ap); 715 (void)fprintf(f, "\n"); 716 (void)fflush(f); 717 if (type == PARSE_INFO) 718 return; 719 if (type == PARSE_FATAL || parseWarnFatal) 720 fatals += 1; 721 if (parseWarnFatal && !fatal_warning_error_printed) { 722 Error("parsing warnings being treated as errors"); 723 fatal_warning_error_printed = TRUE; 724 } 725 } 726 727 /*- 728 * ParseErrorInternal -- 729 * Error function 730 * 731 * Results: 732 * None 733 * 734 * Side Effects: 735 * None 736 */ 737 /* VARARGS */ 738 static void 739 ParseErrorInternal(const char *cfname, size_t clineno, int type, 740 const char *fmt, ...) 741 { 742 va_list ap; 743 744 va_start(ap, fmt); 745 (void)fflush(stdout); 746 ParseVErrorInternal(stderr, cfname, clineno, type, fmt, ap); 747 va_end(ap); 748 749 if (debug_file != stderr && debug_file != stdout) { 750 va_start(ap, fmt); 751 ParseVErrorInternal(debug_file, cfname, clineno, type, fmt, ap); 752 va_end(ap); 753 } 754 } 755 756 /*- 757 * Parse_Error -- 758 * External interface to ParseErrorInternal; uses the default filename 759 * Line number. 760 * 761 * Results: 762 * None 763 * 764 * Side Effects: 765 * None 766 */ 767 /* VARARGS */ 768 void 769 Parse_Error(int type, const char *fmt, ...) 770 { 771 va_list ap; 772 const char *fname; 773 size_t lineno; 774 775 if (curFile == NULL) { 776 fname = NULL; 777 lineno = 0; 778 } else { 779 fname = curFile->fname; 780 lineno = curFile->lineno; 781 } 782 783 va_start(ap, fmt); 784 (void)fflush(stdout); 785 ParseVErrorInternal(stderr, fname, lineno, type, fmt, ap); 786 va_end(ap); 787 788 if (debug_file != stderr && debug_file != stdout) { 789 va_start(ap, fmt); 790 ParseVErrorInternal(debug_file, fname, lineno, type, fmt, ap); 791 va_end(ap); 792 } 793 } 794 795 796 /* 797 * ParseMessage 798 * Parse a .info .warning or .error directive 799 * 800 * The input is the line minus the ".". We substitute 801 * variables, print the message and exit(1) (for .error) or just print 802 * a warning if the directive is malformed. 803 */ 804 static Boolean 805 ParseMessage(char *line) 806 { 807 int mtype; 808 809 switch(*line) { 810 case 'i': 811 mtype = PARSE_INFO; 812 break; 813 case 'w': 814 mtype = PARSE_WARNING; 815 break; 816 case 'e': 817 mtype = PARSE_FATAL; 818 break; 819 default: 820 Parse_Error(PARSE_WARNING, "invalid syntax: \".%s\"", line); 821 return FALSE; 822 } 823 824 while (isalpha((unsigned char)*line)) 825 line++; 826 if (!isspace((unsigned char)*line)) 827 return FALSE; /* not for us */ 828 while (isspace((unsigned char)*line)) 829 line++; 830 831 line = Var_Subst(line, VAR_CMD, VARE_WANTRES); 832 Parse_Error(mtype, "%s", line); 833 free(line); 834 835 if (mtype == PARSE_FATAL) { 836 /* Terminate immediately. */ 837 exit(1); 838 } 839 return TRUE; 840 } 841 842 /*- 843 *--------------------------------------------------------------------- 844 * ParseLinkSrc -- 845 * Link the parent node to its new child. Used in a Lst_ForEach by 846 * ParseDoDependency. If the specType isn't 'Not', the parent 847 * isn't linked as a parent of the child. 848 * 849 * Input: 850 * pgnp The parent node 851 * cgpn The child node 852 * 853 * Results: 854 * Always = 0 855 * 856 * Side Effects: 857 * New elements are added to the parents list of cgn and the 858 * children list of cgn. the unmade field of pgn is updated 859 * to reflect the additional child. 860 *--------------------------------------------------------------------- 861 */ 862 static int 863 ParseLinkSrc(void *pgnp, void *cgnp) 864 { 865 GNode *pgn = (GNode *)pgnp; 866 GNode *cgn = (GNode *)cgnp; 867 868 if ((pgn->type & OP_DOUBLEDEP) && !Lst_IsEmpty(pgn->cohorts)) 869 pgn = LstNode_Datum(Lst_Last(pgn->cohorts)); 870 Lst_Append(pgn->children, cgn); 871 if (specType == Not) 872 Lst_Append(cgn->parents, pgn); 873 pgn->unmade += 1; 874 if (DEBUG(PARSE)) { 875 fprintf(debug_file, "# %s: added child %s - %s\n", __func__, 876 pgn->name, cgn->name); 877 Targ_PrintNode(pgn, 0); 878 Targ_PrintNode(cgn, 0); 879 } 880 return 0; 881 } 882 883 /*- 884 *--------------------------------------------------------------------- 885 * ParseDoOp -- 886 * Apply the parsed operator to the given target node. Used in a 887 * Lst_ForEach call by ParseDoDependency once all targets have 888 * been found and their operator parsed. If the previous and new 889 * operators are incompatible, a major error is taken. 890 * 891 * Input: 892 * gnp The node to which the operator is to be applied 893 * opp The operator to apply 894 * 895 * Results: 896 * Always 0 897 * 898 * Side Effects: 899 * The type field of the node is altered to reflect any new bits in 900 * the op. 901 *--------------------------------------------------------------------- 902 */ 903 static int 904 ParseDoOp(void *gnp, void *opp) 905 { 906 GNode *gn = (GNode *)gnp; 907 int op = *(int *)opp; 908 /* 909 * If the dependency mask of the operator and the node don't match and 910 * the node has actually had an operator applied to it before, and 911 * the operator actually has some dependency information in it, complain. 912 */ 913 if (((op & OP_OPMASK) != (gn->type & OP_OPMASK)) && 914 !OP_NOP(gn->type) && !OP_NOP(op)) 915 { 916 Parse_Error(PARSE_FATAL, "Inconsistent operator for %s", gn->name); 917 return 1; 918 } 919 920 if (op == OP_DOUBLEDEP && (gn->type & OP_OPMASK) == OP_DOUBLEDEP) { 921 /* 922 * If the node was the object of a :: operator, we need to create a 923 * new instance of it for the children and commands on this dependency 924 * line. The new instance is placed on the 'cohorts' list of the 925 * initial one (note the initial one is not on its own cohorts list) 926 * and the new instance is linked to all parents of the initial 927 * instance. 928 */ 929 GNode *cohort; 930 931 /* 932 * Propagate copied bits to the initial node. They'll be propagated 933 * back to the rest of the cohorts later. 934 */ 935 gn->type |= op & ~OP_OPMASK; 936 937 cohort = Targ_FindNode(gn->name, TARG_NOHASH); 938 if (doing_depend) 939 ParseMark(cohort); 940 /* 941 * Make the cohort invisible as well to avoid duplicating it into 942 * other variables. True, parents of this target won't tend to do 943 * anything with their local variables, but better safe than 944 * sorry. (I think this is pointless now, since the relevant list 945 * traversals will no longer see this node anyway. -mycroft) 946 */ 947 cohort->type = op | OP_INVISIBLE; 948 Lst_Append(gn->cohorts, cohort); 949 cohort->centurion = gn; 950 gn->unmade_cohorts += 1; 951 snprintf(cohort->cohort_num, sizeof cohort->cohort_num, "#%d", 952 gn->unmade_cohorts); 953 } else { 954 /* 955 * We don't want to nuke any previous flags (whatever they were) so we 956 * just OR the new operator into the old 957 */ 958 gn->type |= op; 959 } 960 961 return 0; 962 } 963 964 /*- 965 *--------------------------------------------------------------------- 966 * ParseDoSrc -- 967 * Given the name of a source, figure out if it is an attribute 968 * and apply it to the targets if it is. Else decide if there is 969 * some attribute which should be applied *to* the source because 970 * of some special target and apply it if so. Otherwise, make the 971 * source be a child of the targets in the list 'targets' 972 * 973 * Input: 974 * tOp operator (if any) from special targets 975 * src name of the source to handle 976 * 977 * Results: 978 * None 979 * 980 * Side Effects: 981 * Operator bits may be added to the list of targets or to the source. 982 * The targets may have a new source added to their lists of children. 983 *--------------------------------------------------------------------- 984 */ 985 static void 986 ParseDoSrc(int tOp, const char *src) 987 { 988 GNode *gn = NULL; 989 static int wait_number = 0; 990 char wait_src[16]; 991 992 if (*src == '.' && isupper ((unsigned char)src[1])) { 993 int keywd = ParseFindKeyword(src); 994 if (keywd != -1) { 995 int op = parseKeywords[keywd].op; 996 if (op != 0) { 997 if (targets != NULL) 998 Lst_ForEach(targets, ParseDoOp, &op); 999 return; 1000 } 1001 if (parseKeywords[keywd].spec == Wait) { 1002 /* 1003 * We add a .WAIT node in the dependency list. 1004 * After any dynamic dependencies (and filename globbing) 1005 * have happened, it is given a dependency on the each 1006 * previous child back to and previous .WAIT node. 1007 * The next child won't be scheduled until the .WAIT node 1008 * is built. 1009 * We give each .WAIT node a unique name (mainly for diag). 1010 */ 1011 snprintf(wait_src, sizeof wait_src, ".WAIT_%u", ++wait_number); 1012 gn = Targ_FindNode(wait_src, TARG_NOHASH); 1013 if (doing_depend) 1014 ParseMark(gn); 1015 gn->type = OP_WAIT | OP_PHONY | OP_DEPENDS | OP_NOTMAIN; 1016 if (targets != NULL) 1017 Lst_ForEach(targets, ParseLinkSrc, gn); 1018 return; 1019 } 1020 } 1021 } 1022 1023 switch (specType) { 1024 case Main: 1025 /* 1026 * If we have noted the existence of a .MAIN, it means we need 1027 * to add the sources of said target to the list of things 1028 * to create. The string 'src' is likely to be free, so we 1029 * must make a new copy of it. Note that this will only be 1030 * invoked if the user didn't specify a target on the command 1031 * line. This is to allow #ifmake's to succeed, or something... 1032 */ 1033 Lst_Append(create, bmake_strdup(src)); 1034 /* 1035 * Add the name to the .TARGETS variable as well, so the user can 1036 * employ that, if desired. 1037 */ 1038 Var_Append(".TARGETS", src, VAR_GLOBAL); 1039 return; 1040 1041 case Order: 1042 /* 1043 * Create proper predecessor/successor links between the previous 1044 * source and the current one. 1045 */ 1046 gn = Targ_FindNode(src, TARG_CREATE); 1047 if (doing_depend) 1048 ParseMark(gn); 1049 if (predecessor != NULL) { 1050 Lst_Append(predecessor->order_succ, gn); 1051 Lst_Append(gn->order_pred, predecessor); 1052 if (DEBUG(PARSE)) { 1053 fprintf(debug_file, "# %s: added Order dependency %s - %s\n", 1054 __func__, predecessor->name, gn->name); 1055 Targ_PrintNode(predecessor, 0); 1056 Targ_PrintNode(gn, 0); 1057 } 1058 } 1059 /* 1060 * The current source now becomes the predecessor for the next one. 1061 */ 1062 predecessor = gn; 1063 break; 1064 1065 default: 1066 /* 1067 * If the source is not an attribute, we need to find/create 1068 * a node for it. After that we can apply any operator to it 1069 * from a special target or link it to its parents, as 1070 * appropriate. 1071 * 1072 * In the case of a source that was the object of a :: operator, 1073 * the attribute is applied to all of its instances (as kept in 1074 * the 'cohorts' list of the node) or all the cohorts are linked 1075 * to all the targets. 1076 */ 1077 1078 /* Find/create the 'src' node and attach to all targets */ 1079 gn = Targ_FindNode(src, TARG_CREATE); 1080 if (doing_depend) 1081 ParseMark(gn); 1082 if (tOp) { 1083 gn->type |= tOp; 1084 } else { 1085 if (targets != NULL) 1086 Lst_ForEach(targets, ParseLinkSrc, gn); 1087 } 1088 break; 1089 } 1090 } 1091 1092 /*- 1093 *----------------------------------------------------------------------- 1094 * ParseFindMain -- 1095 * Find a real target in the list and set it to be the main one. 1096 * Called by ParseDoDependency when a main target hasn't been found 1097 * yet. 1098 * 1099 * Input: 1100 * gnp Node to examine 1101 * 1102 * Results: 1103 * 0 if main not found yet, 1 if it is. 1104 * 1105 * Side Effects: 1106 * mainNode is changed and Targ_SetMain is called. 1107 * 1108 *----------------------------------------------------------------------- 1109 */ 1110 static int 1111 ParseFindMain(void *gnp, void *dummy MAKE_ATTR_UNUSED) 1112 { 1113 GNode *gn = (GNode *)gnp; 1114 if (!(gn->type & OP_NOTARGET)) { 1115 mainNode = gn; 1116 Targ_SetMain(gn); 1117 return 1; 1118 } else { 1119 return 0; 1120 } 1121 } 1122 1123 /*- 1124 *----------------------------------------------------------------------- 1125 * ParseAddDir -- 1126 * Front-end for Dir_AddDir to make sure Lst_ForEach keeps going 1127 * 1128 * Results: 1129 * === 0 1130 * 1131 * Side Effects: 1132 * See Dir_AddDir. 1133 * 1134 *----------------------------------------------------------------------- 1135 */ 1136 static int 1137 ParseAddDir(void *path, void *name) 1138 { 1139 (void)Dir_AddDir((Lst) path, (char *)name); 1140 return 0; 1141 } 1142 1143 /*- 1144 *----------------------------------------------------------------------- 1145 * ParseClearPath -- 1146 * Front-end for Dir_ClearPath to make sure Lst_ForEach keeps going 1147 * 1148 * Results: 1149 * === 0 1150 * 1151 * Side Effects: 1152 * See Dir_ClearPath 1153 * 1154 *----------------------------------------------------------------------- 1155 */ 1156 static int 1157 ParseClearPath(void *path, void *dummy MAKE_ATTR_UNUSED) 1158 { 1159 Dir_ClearPath((Lst) path); 1160 return 0; 1161 } 1162 1163 /*- 1164 *--------------------------------------------------------------------- 1165 * ParseDoDependency -- 1166 * Parse the dependency line in line. 1167 * 1168 * Input: 1169 * line the line to parse 1170 * 1171 * Results: 1172 * None 1173 * 1174 * Side Effects: 1175 * The nodes of the sources are linked as children to the nodes of the 1176 * targets. Some nodes may be created. 1177 * 1178 * We parse a dependency line by first extracting words from the line and 1179 * finding nodes in the list of all targets with that name. This is done 1180 * until a character is encountered which is an operator character. Currently 1181 * these are only ! and :. At this point the operator is parsed and the 1182 * pointer into the line advanced until the first source is encountered. 1183 * The parsed operator is applied to each node in the 'targets' list, 1184 * which is where the nodes found for the targets are kept, by means of 1185 * the ParseDoOp function. 1186 * The sources are read in much the same way as the targets were except 1187 * that now they are expanded using the wildcarding scheme of the C-Shell 1188 * and all instances of the resulting words in the list of all targets 1189 * are found. Each of the resulting nodes is then linked to each of the 1190 * targets as one of its children. 1191 * Certain targets are handled specially. These are the ones detailed 1192 * by the specType variable. 1193 * The storing of transformation rules is also taken care of here. 1194 * A target is recognized as a transformation rule by calling 1195 * Suff_IsTransform. If it is a transformation rule, its node is gotten 1196 * from the suffix module via Suff_AddTransform rather than the standard 1197 * Targ_FindNode in the target module. 1198 *--------------------------------------------------------------------- 1199 */ 1200 static void 1201 ParseDoDependency(char *line) 1202 { 1203 char *cp; /* our current position */ 1204 GNode *gn = NULL; /* a general purpose temporary node */ 1205 int op; /* the operator on the line */ 1206 char savec; /* a place to save a character */ 1207 Lst paths; /* List of search paths to alter when parsing 1208 * a list of .PATH targets */ 1209 int tOp; /* operator from special target */ 1210 Lst sources; /* list of archive source names after 1211 * expansion */ 1212 Lst curTargs; /* list of target names to be found and added 1213 * to the targets list */ 1214 char *lstart = line; 1215 1216 if (DEBUG(PARSE)) 1217 fprintf(debug_file, "ParseDoDependency(%s)\n", line); 1218 tOp = 0; 1219 1220 specType = Not; 1221 paths = NULL; 1222 1223 curTargs = Lst_Init(); 1224 1225 /* 1226 * First, grind through the targets. 1227 */ 1228 1229 do { 1230 /* 1231 * Here LINE points to the beginning of the next word, and 1232 * LSTART points to the actual beginning of the line. 1233 */ 1234 1235 /* Find the end of the next word. */ 1236 for (cp = line; *cp && (ParseIsEscaped(lstart, cp) || 1237 !(isspace((unsigned char)*cp) || 1238 *cp == '!' || *cp == ':' || *cp == LPAREN)); 1239 cp++) { 1240 if (*cp == '$') { 1241 /* 1242 * Must be a dynamic source (would have been expanded 1243 * otherwise), so call the Var module to parse the puppy 1244 * so we can safely advance beyond it...There should be 1245 * no errors in this, as they would have been discovered 1246 * in the initial Var_Subst and we wouldn't be here. 1247 */ 1248 int length; 1249 void *freeIt; 1250 1251 (void)Var_Parse(cp, VAR_CMD, VARE_UNDEFERR|VARE_WANTRES, 1252 &length, &freeIt); 1253 free(freeIt); 1254 cp += length - 1; 1255 } 1256 } 1257 1258 /* 1259 * If the word is followed by a left parenthesis, it's the 1260 * name of an object file inside an archive (ar file). 1261 */ 1262 if (!ParseIsEscaped(lstart, cp) && *cp == LPAREN) { 1263 /* 1264 * Archives must be handled specially to make sure the OP_ARCHV 1265 * flag is set in their 'type' field, for one thing, and because 1266 * things like "archive(file1.o file2.o file3.o)" are permissible. 1267 * Arch_ParseArchive will set 'line' to be the first non-blank 1268 * after the archive-spec. It creates/finds nodes for the members 1269 * and places them on the given list, returning TRUE if all 1270 * went well and FALSE if there was an error in the 1271 * specification. On error, line should remain untouched. 1272 */ 1273 if (!Arch_ParseArchive(&line, targets, VAR_CMD)) { 1274 Parse_Error(PARSE_FATAL, 1275 "Error in archive specification: \"%s\"", line); 1276 goto out; 1277 } else { 1278 /* Done with this word; on to the next. */ 1279 cp = line; 1280 continue; 1281 } 1282 } 1283 1284 if (!*cp) { 1285 /* 1286 * We got to the end of the line while we were still 1287 * looking at targets. 1288 * 1289 * Ending a dependency line without an operator is a Bozo 1290 * no-no. As a heuristic, this is also often triggered by 1291 * undetected conflicts from cvs/rcs merges. 1292 */ 1293 if ((strncmp(line, "<<<<<<", 6) == 0) || 1294 (strncmp(line, "======", 6) == 0) || 1295 (strncmp(line, ">>>>>>", 6) == 0)) 1296 Parse_Error(PARSE_FATAL, 1297 "Makefile appears to contain unresolved cvs/rcs/??? merge conflicts"); 1298 else if (lstart[0] == '.') { 1299 const char *dirstart = lstart + 1; 1300 const char *dirend; 1301 while (isspace((unsigned char)*dirstart)) 1302 dirstart++; 1303 dirend = dirstart; 1304 while (isalnum((unsigned char)*dirend) || *dirend == '-') 1305 dirend++; 1306 Parse_Error(PARSE_FATAL, "Unknown directive \"%.*s\"", 1307 (int)(dirend - dirstart), dirstart); 1308 } else 1309 Parse_Error(PARSE_FATAL, "Need an operator"); 1310 goto out; 1311 } 1312 1313 /* Insert a null terminator. */ 1314 savec = *cp; 1315 *cp = '\0'; 1316 1317 /* 1318 * Got the word. See if it's a special target and if so set 1319 * specType to match it. 1320 */ 1321 if (*line == '.' && isupper ((unsigned char)line[1])) { 1322 /* 1323 * See if the target is a special target that must have it 1324 * or its sources handled specially. 1325 */ 1326 int keywd = ParseFindKeyword(line); 1327 if (keywd != -1) { 1328 if (specType == ExPath && parseKeywords[keywd].spec != ExPath) { 1329 Parse_Error(PARSE_FATAL, "Mismatched special targets"); 1330 goto out; 1331 } 1332 1333 specType = parseKeywords[keywd].spec; 1334 tOp = parseKeywords[keywd].op; 1335 1336 /* 1337 * Certain special targets have special semantics: 1338 * .PATH Have to set the dirSearchPath 1339 * variable too 1340 * .MAIN Its sources are only used if 1341 * nothing has been specified to 1342 * create. 1343 * .DEFAULT Need to create a node to hang 1344 * commands on, but we don't want 1345 * it in the graph, nor do we want 1346 * it to be the Main Target, so we 1347 * create it, set OP_NOTMAIN and 1348 * add it to the list, setting 1349 * DEFAULT to the new node for 1350 * later use. We claim the node is 1351 * A transformation rule to make 1352 * life easier later, when we'll 1353 * use Make_HandleUse to actually 1354 * apply the .DEFAULT commands. 1355 * .PHONY The list of targets 1356 * .NOPATH Don't search for file in the path 1357 * .STALE 1358 * .BEGIN 1359 * .END 1360 * .ERROR 1361 * .DELETE_ON_ERROR 1362 * .INTERRUPT Are not to be considered the 1363 * main target. 1364 * .NOTPARALLEL Make only one target at a time. 1365 * .SINGLESHELL Create a shell for each command. 1366 * .ORDER Must set initial predecessor to NULL 1367 */ 1368 switch (specType) { 1369 case ExPath: 1370 if (paths == NULL) { 1371 paths = Lst_Init(); 1372 } 1373 Lst_Append(paths, dirSearchPath); 1374 break; 1375 case Main: 1376 if (!Lst_IsEmpty(create)) { 1377 specType = Not; 1378 } 1379 break; 1380 case Begin: 1381 case End: 1382 case Stale: 1383 case dotError: 1384 case Interrupt: 1385 gn = Targ_FindNode(line, TARG_CREATE); 1386 if (doing_depend) 1387 ParseMark(gn); 1388 gn->type |= OP_NOTMAIN|OP_SPECIAL; 1389 Lst_Append(targets, gn); 1390 break; 1391 case Default: 1392 gn = Targ_NewGN(".DEFAULT"); 1393 gn->type |= (OP_NOTMAIN|OP_TRANSFORM); 1394 Lst_Append(targets, gn); 1395 DEFAULT = gn; 1396 break; 1397 case DeleteOnError: 1398 deleteOnError = TRUE; 1399 break; 1400 case NotParallel: 1401 maxJobs = 1; 1402 break; 1403 case SingleShell: 1404 compatMake = TRUE; 1405 break; 1406 case Order: 1407 predecessor = NULL; 1408 break; 1409 default: 1410 break; 1411 } 1412 } else if (strncmp(line, ".PATH", 5) == 0) { 1413 /* 1414 * .PATH<suffix> has to be handled specially. 1415 * Call on the suffix module to give us a path to 1416 * modify. 1417 */ 1418 Lst path; 1419 1420 specType = ExPath; 1421 path = Suff_GetPath(&line[5]); 1422 if (path == NULL) { 1423 Parse_Error(PARSE_FATAL, 1424 "Suffix '%s' not defined (yet)", 1425 &line[5]); 1426 goto out; 1427 } else { 1428 if (paths == NULL) { 1429 paths = Lst_Init(); 1430 } 1431 Lst_Append(paths, path); 1432 } 1433 } 1434 } 1435 1436 /* 1437 * Have word in line. Get or create its node and stick it at 1438 * the end of the targets list 1439 */ 1440 if (specType == Not && *line != '\0') { 1441 if (Dir_HasWildcards(line)) { 1442 /* 1443 * Targets are to be sought only in the current directory, 1444 * so create an empty path for the thing. Note we need to 1445 * use Dir_Destroy in the destruction of the path as the 1446 * Dir module could have added a directory to the path... 1447 */ 1448 Lst emptyPath = Lst_Init(); 1449 1450 Dir_Expand(line, emptyPath, curTargs); 1451 1452 Lst_Destroy(emptyPath, Dir_Destroy); 1453 } else { 1454 /* 1455 * No wildcards, but we want to avoid code duplication, 1456 * so create a list with the word on it. 1457 */ 1458 Lst_Append(curTargs, line); 1459 } 1460 1461 /* Apply the targets. */ 1462 1463 while(!Lst_IsEmpty(curTargs)) { 1464 char *targName = Lst_Dequeue(curTargs); 1465 1466 if (!Suff_IsTransform (targName)) { 1467 gn = Targ_FindNode(targName, TARG_CREATE); 1468 } else { 1469 gn = Suff_AddTransform(targName); 1470 } 1471 if (doing_depend) 1472 ParseMark(gn); 1473 1474 Lst_Append(targets, gn); 1475 } 1476 } else if (specType == ExPath && *line != '.' && *line != '\0') { 1477 Parse_Error(PARSE_WARNING, "Extra target (%s) ignored", line); 1478 } 1479 1480 /* Don't need the inserted null terminator any more. */ 1481 *cp = savec; 1482 1483 /* 1484 * If it is a special type and not .PATH, it's the only target we 1485 * allow on this line... 1486 */ 1487 if (specType != Not && specType != ExPath) { 1488 Boolean warning = FALSE; 1489 1490 while (*cp && (ParseIsEscaped(lstart, cp) || 1491 (*cp != '!' && *cp != ':'))) { 1492 if (ParseIsEscaped(lstart, cp) || 1493 (*cp != ' ' && *cp != '\t')) { 1494 warning = TRUE; 1495 } 1496 cp++; 1497 } 1498 if (warning) { 1499 Parse_Error(PARSE_WARNING, "Extra target ignored"); 1500 } 1501 } else { 1502 while (*cp && isspace ((unsigned char)*cp)) { 1503 cp++; 1504 } 1505 } 1506 line = cp; 1507 } while (*line && (ParseIsEscaped(lstart, line) || 1508 (*line != '!' && *line != ':'))); 1509 1510 /* 1511 * Don't need the list of target names anymore... 1512 */ 1513 Lst_Free(curTargs); 1514 curTargs = NULL; 1515 1516 if (targets != NULL && !Lst_IsEmpty(targets)) { 1517 switch(specType) { 1518 default: 1519 Parse_Error(PARSE_WARNING, "Special and mundane targets don't mix. Mundane ones ignored"); 1520 break; 1521 case Default: 1522 case Stale: 1523 case Begin: 1524 case End: 1525 case dotError: 1526 case Interrupt: 1527 /* 1528 * These four create nodes on which to hang commands, so 1529 * targets shouldn't be empty... 1530 */ 1531 case Not: 1532 /* 1533 * Nothing special here -- targets can be empty if it wants. 1534 */ 1535 break; 1536 } 1537 } 1538 1539 /* 1540 * Have now parsed all the target names. Must parse the operator next. The 1541 * result is left in op . 1542 */ 1543 if (*cp == '!') { 1544 op = OP_FORCE; 1545 } else if (*cp == ':') { 1546 if (cp[1] == ':') { 1547 op = OP_DOUBLEDEP; 1548 cp++; 1549 } else { 1550 op = OP_DEPENDS; 1551 } 1552 } else { 1553 Parse_Error(PARSE_FATAL, lstart[0] == '.' ? "Unknown directive" 1554 : "Missing dependency operator"); 1555 goto out; 1556 } 1557 1558 /* Advance beyond the operator */ 1559 cp++; 1560 1561 /* 1562 * Apply the operator to the target. This is how we remember which 1563 * operator a target was defined with. It fails if the operator 1564 * used isn't consistent across all references. 1565 */ 1566 if (targets != NULL) 1567 Lst_ForEach(targets, ParseDoOp, &op); 1568 1569 /* 1570 * Onward to the sources. 1571 * 1572 * LINE will now point to the first source word, if any, or the 1573 * end of the string if not. 1574 */ 1575 while (*cp && isspace ((unsigned char)*cp)) { 1576 cp++; 1577 } 1578 line = cp; 1579 1580 /* 1581 * Several special targets take different actions if present with no 1582 * sources: 1583 * a .SUFFIXES line with no sources clears out all old suffixes 1584 * a .PRECIOUS line makes all targets precious 1585 * a .IGNORE line ignores errors for all targets 1586 * a .SILENT line creates silence when making all targets 1587 * a .PATH removes all directories from the search path(s). 1588 */ 1589 if (!*line) { 1590 switch (specType) { 1591 case Suffixes: 1592 Suff_ClearSuffixes(); 1593 break; 1594 case Precious: 1595 allPrecious = TRUE; 1596 break; 1597 case Ignore: 1598 ignoreErrors = TRUE; 1599 break; 1600 case Silent: 1601 beSilent = TRUE; 1602 break; 1603 case ExPath: 1604 if (paths != NULL) 1605 Lst_ForEach(paths, ParseClearPath, NULL); 1606 Dir_SetPATH(); 1607 break; 1608 #ifdef POSIX 1609 case Posix: 1610 Var_Set("%POSIX", "1003.2", VAR_GLOBAL); 1611 break; 1612 #endif 1613 default: 1614 break; 1615 } 1616 } else if (specType == MFlags) { 1617 /* 1618 * Call on functions in main.c to deal with these arguments and 1619 * set the initial character to a null-character so the loop to 1620 * get sources won't get anything 1621 */ 1622 Main_ParseArgLine(line); 1623 *line = '\0'; 1624 } else if (specType == ExShell) { 1625 if (!Job_ParseShell(line)) { 1626 Parse_Error(PARSE_FATAL, "improper shell specification"); 1627 goto out; 1628 } 1629 *line = '\0'; 1630 } else if (specType == NotParallel || specType == SingleShell || 1631 specType == DeleteOnError) { 1632 *line = '\0'; 1633 } 1634 1635 /* 1636 * NOW GO FOR THE SOURCES 1637 */ 1638 if (specType == Suffixes || specType == ExPath || 1639 specType == Includes || specType == Libs || 1640 specType == Null || specType == ExObjdir) 1641 { 1642 while (*line) { 1643 /* 1644 * If the target was one that doesn't take files as its sources 1645 * but takes something like suffixes, we take each 1646 * space-separated word on the line as a something and deal 1647 * with it accordingly. 1648 * 1649 * If the target was .SUFFIXES, we take each source as a 1650 * suffix and add it to the list of suffixes maintained by the 1651 * Suff module. 1652 * 1653 * If the target was a .PATH, we add the source as a directory 1654 * to search on the search path. 1655 * 1656 * If it was .INCLUDES, the source is taken to be the suffix of 1657 * files which will be #included and whose search path should 1658 * be present in the .INCLUDES variable. 1659 * 1660 * If it was .LIBS, the source is taken to be the suffix of 1661 * files which are considered libraries and whose search path 1662 * should be present in the .LIBS variable. 1663 * 1664 * If it was .NULL, the source is the suffix to use when a file 1665 * has no valid suffix. 1666 * 1667 * If it was .OBJDIR, the source is a new definition for .OBJDIR, 1668 * and will cause make to do a new chdir to that path. 1669 */ 1670 while (*cp && !isspace ((unsigned char)*cp)) { 1671 cp++; 1672 } 1673 savec = *cp; 1674 *cp = '\0'; 1675 switch (specType) { 1676 case Suffixes: 1677 Suff_AddSuffix(line, &mainNode); 1678 break; 1679 case ExPath: 1680 if (paths != NULL) 1681 Lst_ForEach(paths, ParseAddDir, line); 1682 break; 1683 case Includes: 1684 Suff_AddInclude(line); 1685 break; 1686 case Libs: 1687 Suff_AddLib(line); 1688 break; 1689 case Null: 1690 Suff_SetNull(line); 1691 break; 1692 case ExObjdir: 1693 Main_SetObjdir("%s", line); 1694 break; 1695 default: 1696 break; 1697 } 1698 *cp = savec; 1699 if (savec != '\0') { 1700 cp++; 1701 } 1702 while (*cp && isspace ((unsigned char)*cp)) { 1703 cp++; 1704 } 1705 line = cp; 1706 } 1707 if (paths) { 1708 Lst_Free(paths); 1709 paths = NULL; 1710 } 1711 if (specType == ExPath) 1712 Dir_SetPATH(); 1713 } else { 1714 assert(paths == NULL); 1715 while (*line) { 1716 /* 1717 * The targets take real sources, so we must beware of archive 1718 * specifications (i.e. things with left parentheses in them) 1719 * and handle them accordingly. 1720 */ 1721 for (; *cp && !isspace ((unsigned char)*cp); cp++) { 1722 if (*cp == LPAREN && cp > line && cp[-1] != '$') { 1723 /* 1724 * Only stop for a left parenthesis if it isn't at the 1725 * start of a word (that'll be for variable changes 1726 * later) and isn't preceded by a dollar sign (a dynamic 1727 * source). 1728 */ 1729 break; 1730 } 1731 } 1732 1733 if (*cp == LPAREN) { 1734 sources = Lst_Init(); 1735 if (!Arch_ParseArchive(&line, sources, VAR_CMD)) { 1736 Parse_Error(PARSE_FATAL, 1737 "Error in source archive spec \"%s\"", line); 1738 goto out; 1739 } 1740 1741 while (!Lst_IsEmpty(sources)) { 1742 gn = Lst_Dequeue(sources); 1743 ParseDoSrc(tOp, gn->name); 1744 } 1745 Lst_Free(sources); 1746 cp = line; 1747 } else { 1748 if (*cp) { 1749 *cp = '\0'; 1750 cp += 1; 1751 } 1752 1753 ParseDoSrc(tOp, line); 1754 } 1755 while (*cp && isspace ((unsigned char)*cp)) { 1756 cp++; 1757 } 1758 line = cp; 1759 } 1760 } 1761 1762 if (mainNode == NULL && targets != NULL) { 1763 /* 1764 * If we have yet to decide on a main target to make, in the 1765 * absence of any user input, we want the first target on 1766 * the first dependency line that is actually a real target 1767 * (i.e. isn't a .USE or .EXEC rule) to be made. 1768 */ 1769 Lst_ForEach(targets, ParseFindMain, NULL); 1770 } 1771 1772 out: 1773 if (paths != NULL) 1774 Lst_Free(paths); 1775 if (curTargs != NULL) 1776 Lst_Free(curTargs); 1777 } 1778 1779 /*- 1780 *--------------------------------------------------------------------- 1781 * Parse_IsVar -- 1782 * Return TRUE if the passed line is a variable assignment. A variable 1783 * assignment consists of a single word followed by optional whitespace 1784 * followed by either a += or an = operator. 1785 * This function is used both by the Parse_File function and main when 1786 * parsing the command-line arguments. 1787 * 1788 * Input: 1789 * line the line to check 1790 * 1791 * Results: 1792 * TRUE if it is. FALSE if it ain't 1793 * 1794 * Side Effects: 1795 * none 1796 *--------------------------------------------------------------------- 1797 */ 1798 Boolean 1799 Parse_IsVar(char *line) 1800 { 1801 Boolean wasSpace = FALSE; /* set TRUE if found a space */ 1802 char ch; 1803 int level = 0; 1804 #define ISEQOPERATOR(c) \ 1805 (((c) == '+') || ((c) == ':') || ((c) == '?') || ((c) == '!')) 1806 1807 /* 1808 * Skip to variable name 1809 */ 1810 while (*line == ' ' || *line == '\t') 1811 line++; 1812 1813 /* Scan for one of the assignment operators outside a variable expansion */ 1814 while ((ch = *line++) != 0) { 1815 if (ch == '(' || ch == '{') { 1816 level++; 1817 continue; 1818 } 1819 if (ch == ')' || ch == '}') { 1820 level--; 1821 continue; 1822 } 1823 if (level != 0) 1824 continue; 1825 while (ch == ' ' || ch == '\t') { 1826 ch = *line++; 1827 wasSpace = TRUE; 1828 } 1829 #ifdef SUNSHCMD 1830 if (ch == ':' && strncmp(line, "sh", 2) == 0) { 1831 line += 2; 1832 continue; 1833 } 1834 #endif 1835 if (ch == '=') 1836 return TRUE; 1837 if (*line == '=' && ISEQOPERATOR(ch)) 1838 return TRUE; 1839 if (wasSpace) 1840 return FALSE; 1841 } 1842 1843 return FALSE; 1844 } 1845 1846 /*- 1847 *--------------------------------------------------------------------- 1848 * Parse_DoVar -- 1849 * Take the variable assignment in the passed line and do it in the 1850 * global context. 1851 * 1852 * Note: There is a lexical ambiguity with assignment modifier characters 1853 * in variable names. This routine interprets the character before the = 1854 * as a modifier. Therefore, an assignment like 1855 * C++=/usr/bin/CC 1856 * is interpreted as "C+ +=" instead of "C++ =". 1857 * 1858 * Input: 1859 * line a line guaranteed to be a variable assignment. 1860 * This reduces error checks 1861 * ctxt Context in which to do the assignment 1862 * 1863 * Results: 1864 * none 1865 * 1866 * Side Effects: 1867 * the variable structure of the given variable name is altered in the 1868 * global context. 1869 *--------------------------------------------------------------------- 1870 */ 1871 void 1872 Parse_DoVar(char *line, GNode *ctxt) 1873 { 1874 char *cp; /* pointer into line */ 1875 enum { 1876 VAR_SUBST, VAR_APPEND, VAR_SHELL, VAR_NORMAL 1877 } type; /* Type of assignment */ 1878 char *opc; /* ptr to operator character to 1879 * null-terminate the variable name */ 1880 Boolean freeCp = FALSE; /* TRUE if cp needs to be freed, 1881 * i.e. if any variable expansion was 1882 * performed */ 1883 int depth; 1884 1885 /* 1886 * Skip to variable name 1887 */ 1888 while (*line == ' ' || *line == '\t') 1889 line++; 1890 1891 /* 1892 * Skip to operator character, nulling out whitespace as we go 1893 * XXX Rather than counting () and {} we should look for $ and 1894 * then expand the variable. 1895 */ 1896 for (depth = 0, cp = line; depth > 0 || *cp != '='; cp++) { 1897 if (*cp == '(' || *cp == '{') { 1898 depth++; 1899 continue; 1900 } 1901 if (*cp == ')' || *cp == '}') { 1902 depth--; 1903 continue; 1904 } 1905 if (depth == 0 && isspace ((unsigned char)*cp)) { 1906 *cp = '\0'; 1907 } 1908 } 1909 opc = cp-1; /* operator is the previous character */ 1910 *cp++ = '\0'; /* nuke the = */ 1911 1912 /* 1913 * Check operator type 1914 */ 1915 switch (*opc) { 1916 case '+': 1917 type = VAR_APPEND; 1918 *opc = '\0'; 1919 break; 1920 1921 case '?': 1922 /* 1923 * If the variable already has a value, we don't do anything. 1924 */ 1925 *opc = '\0'; 1926 if (Var_Exists(line, ctxt)) { 1927 return; 1928 } else { 1929 type = VAR_NORMAL; 1930 } 1931 break; 1932 1933 case ':': 1934 type = VAR_SUBST; 1935 *opc = '\0'; 1936 break; 1937 1938 case '!': 1939 type = VAR_SHELL; 1940 *opc = '\0'; 1941 break; 1942 1943 default: 1944 #ifdef SUNSHCMD 1945 while (opc > line && *opc != ':') 1946 opc--; 1947 1948 if (strncmp(opc, ":sh", 3) == 0) { 1949 type = VAR_SHELL; 1950 *opc = '\0'; 1951 break; 1952 } 1953 #endif 1954 type = VAR_NORMAL; 1955 break; 1956 } 1957 1958 while (isspace((unsigned char)*cp)) 1959 cp++; 1960 1961 if (DEBUG(LINT)) { 1962 if (type != VAR_SUBST && strchr(cp, '$') != NULL) { 1963 /* sanity check now */ 1964 char *cp2; 1965 1966 cp2 = Var_Subst(cp, ctxt, VARE_ASSIGN); 1967 free(cp2); 1968 } 1969 } 1970 1971 if (type == VAR_APPEND) { 1972 Var_Append(line, cp, ctxt); 1973 } else if (type == VAR_SUBST) { 1974 /* 1975 * Allow variables in the old value to be undefined, but leave their 1976 * invocation alone -- this is done by forcing oldVars to be false. 1977 * XXX: This can cause recursive variables, but that's not hard to do, 1978 * and this allows someone to do something like 1979 * 1980 * CFLAGS = $(.INCLUDES) 1981 * CFLAGS := -I.. $(CFLAGS) 1982 * 1983 * And not get an error. 1984 */ 1985 Boolean oldOldVars = oldVars; 1986 1987 oldVars = FALSE; 1988 1989 /* 1990 * make sure that we set the variable the first time to nothing 1991 * so that it gets substituted! 1992 */ 1993 if (!Var_Exists(line, ctxt)) 1994 Var_Set(line, "", ctxt); 1995 1996 cp = Var_Subst(cp, ctxt, VARE_WANTRES|VARE_ASSIGN); 1997 oldVars = oldOldVars; 1998 freeCp = TRUE; 1999 2000 Var_Set(line, cp, ctxt); 2001 } else if (type == VAR_SHELL) { 2002 char *res; 2003 const char *error; 2004 2005 if (strchr(cp, '$') != NULL) { 2006 /* 2007 * There's a dollar sign in the command, so perform variable 2008 * expansion on the whole thing. The resulting string will need 2009 * freeing when we're done. 2010 */ 2011 cp = Var_Subst(cp, VAR_CMD, VARE_UNDEFERR|VARE_WANTRES); 2012 freeCp = TRUE; 2013 } 2014 2015 res = Cmd_Exec(cp, &error); 2016 Var_Set(line, res, ctxt); 2017 free(res); 2018 2019 if (error) 2020 Parse_Error(PARSE_WARNING, error, cp); 2021 } else { 2022 /* 2023 * Normal assignment -- just do it. 2024 */ 2025 Var_Set(line, cp, ctxt); 2026 } 2027 if (strcmp(line, MAKEOVERRIDES) == 0) 2028 Main_ExportMAKEFLAGS(FALSE); /* re-export MAKEFLAGS */ 2029 else if (strcmp(line, ".CURDIR") == 0) { 2030 /* 2031 * Somone is being (too?) clever... 2032 * Let's pretend they know what they are doing and 2033 * re-initialize the 'cur' Path. 2034 */ 2035 Dir_InitCur(cp); 2036 Dir_SetPATH(); 2037 } else if (strcmp(line, MAKE_JOB_PREFIX) == 0) { 2038 Job_SetPrefix(); 2039 } else if (strcmp(line, MAKE_EXPORTED) == 0) { 2040 Var_Export(cp, FALSE); 2041 } 2042 if (freeCp) 2043 free(cp); 2044 } 2045 2046 2047 /* 2048 * ParseMaybeSubMake -- 2049 * Scan the command string to see if it a possible submake node 2050 * Input: 2051 * cmd the command to scan 2052 * Results: 2053 * TRUE if the command is possibly a submake, FALSE if not. 2054 */ 2055 static Boolean 2056 ParseMaybeSubMake(const char *cmd) 2057 { 2058 size_t i; 2059 static struct { 2060 const char *name; 2061 size_t len; 2062 } vals[] = { 2063 #define MKV(A) { A, sizeof(A) - 1 } 2064 MKV("${MAKE}"), 2065 MKV("${.MAKE}"), 2066 MKV("$(MAKE)"), 2067 MKV("$(.MAKE)"), 2068 MKV("make"), 2069 }; 2070 for (i = 0; i < sizeof(vals)/sizeof(vals[0]); i++) { 2071 char *ptr; 2072 if ((ptr = strstr(cmd, vals[i].name)) == NULL) 2073 continue; 2074 if ((ptr == cmd || !isalnum((unsigned char)ptr[-1])) 2075 && !isalnum((unsigned char)ptr[vals[i].len])) 2076 return TRUE; 2077 } 2078 return FALSE; 2079 } 2080 2081 /*- 2082 * ParseAddCmd -- 2083 * Lst_ForEach function to add a command line to all targets 2084 * 2085 * Input: 2086 * gnp the node to which the command is to be added 2087 * cmd the command to add 2088 * 2089 * Results: 2090 * Always 0 2091 * 2092 * Side Effects: 2093 * A new element is added to the commands list of the node, 2094 * and the node can be marked as a submake node if the command is 2095 * determined to be that. 2096 */ 2097 static int 2098 ParseAddCmd(void *gnp, void *cmd) 2099 { 2100 GNode *gn = (GNode *)gnp; 2101 2102 /* Add to last (ie current) cohort for :: targets */ 2103 if ((gn->type & OP_DOUBLEDEP) && !Lst_IsEmpty(gn->cohorts)) 2104 gn = LstNode_Datum(Lst_Last(gn->cohorts)); 2105 2106 /* if target already supplied, ignore commands */ 2107 if (!(gn->type & OP_HAS_COMMANDS)) { 2108 Lst_Append(gn->commands, cmd); 2109 if (ParseMaybeSubMake(cmd)) 2110 gn->type |= OP_SUBMAKE; 2111 ParseMark(gn); 2112 } else { 2113 #ifdef notyet 2114 /* XXX: We cannot do this until we fix the tree */ 2115 Lst_Append(gn->commands, cmd); 2116 Parse_Error(PARSE_WARNING, 2117 "overriding commands for target \"%s\"; " 2118 "previous commands defined at %s: %d ignored", 2119 gn->name, gn->fname, gn->lineno); 2120 #else 2121 Parse_Error(PARSE_WARNING, 2122 "duplicate script for target \"%s\" ignored", 2123 gn->name); 2124 ParseErrorInternal(gn->fname, gn->lineno, PARSE_WARNING, 2125 "using previous script for \"%s\" defined here", 2126 gn->name); 2127 #endif 2128 } 2129 return 0; 2130 } 2131 2132 /*- 2133 *----------------------------------------------------------------------- 2134 * ParseHasCommands -- 2135 * Callback procedure for Parse_File when destroying the list of 2136 * targets on the last dependency line. Marks a target as already 2137 * having commands if it does, to keep from having shell commands 2138 * on multiple dependency lines. 2139 * 2140 * Input: 2141 * gnp Node to examine 2142 * 2143 * Results: 2144 * None 2145 * 2146 * Side Effects: 2147 * OP_HAS_COMMANDS may be set for the target. 2148 * 2149 *----------------------------------------------------------------------- 2150 */ 2151 static void 2152 ParseHasCommands(void *gnp) 2153 { 2154 GNode *gn = (GNode *)gnp; 2155 if (!Lst_IsEmpty(gn->commands)) { 2156 gn->type |= OP_HAS_COMMANDS; 2157 } 2158 } 2159 2160 /*- 2161 *----------------------------------------------------------------------- 2162 * Parse_AddIncludeDir -- 2163 * Add a directory to the path searched for included makefiles 2164 * bracketed by double-quotes. Used by functions in main.c 2165 * 2166 * Input: 2167 * dir The name of the directory to add 2168 * 2169 * Results: 2170 * None. 2171 * 2172 * Side Effects: 2173 * The directory is appended to the list. 2174 * 2175 *----------------------------------------------------------------------- 2176 */ 2177 void 2178 Parse_AddIncludeDir(char *dir) 2179 { 2180 (void)Dir_AddDir(parseIncPath, dir); 2181 } 2182 2183 /*- 2184 *--------------------------------------------------------------------- 2185 * ParseDoInclude -- 2186 * Push to another file. 2187 * 2188 * The input is the line minus the `.'. A file spec is a string 2189 * enclosed in <> or "". The former is looked for only in sysIncPath. 2190 * The latter in . and the directories specified by -I command line 2191 * options 2192 * 2193 * Results: 2194 * None 2195 * 2196 * Side Effects: 2197 * A structure is added to the includes Lst and readProc, lineno, 2198 * fname and curFILE are altered for the new file 2199 *--------------------------------------------------------------------- 2200 */ 2201 2202 static void 2203 Parse_include_file(char *file, Boolean isSystem, Boolean depinc, int silent) 2204 { 2205 struct loadedfile *lf; 2206 char *fullname; /* full pathname of file */ 2207 char *newName; 2208 char *prefEnd, *incdir; 2209 int fd; 2210 int i; 2211 2212 /* 2213 * Now we know the file's name and its search path, we attempt to 2214 * find the durn thing. A return of NULL indicates the file don't 2215 * exist. 2216 */ 2217 fullname = file[0] == '/' ? bmake_strdup(file) : NULL; 2218 2219 if (fullname == NULL && !isSystem) { 2220 /* 2221 * Include files contained in double-quotes are first searched for 2222 * relative to the including file's location. We don't want to 2223 * cd there, of course, so we just tack on the old file's 2224 * leading path components and call Dir_FindFile to see if 2225 * we can locate the beast. 2226 */ 2227 2228 incdir = bmake_strdup(curFile->fname); 2229 prefEnd = strrchr(incdir, '/'); 2230 if (prefEnd != NULL) { 2231 *prefEnd = '\0'; 2232 /* Now do lexical processing of leading "../" on the filename */ 2233 for (i = 0; strncmp(file + i, "../", 3) == 0; i += 3) { 2234 prefEnd = strrchr(incdir + 1, '/'); 2235 if (prefEnd == NULL || strcmp(prefEnd, "/..") == 0) 2236 break; 2237 *prefEnd = '\0'; 2238 } 2239 newName = str_concat3(incdir, "/", file + i); 2240 fullname = Dir_FindFile(newName, parseIncPath); 2241 if (fullname == NULL) 2242 fullname = Dir_FindFile(newName, dirSearchPath); 2243 free(newName); 2244 } 2245 free(incdir); 2246 2247 if (fullname == NULL) { 2248 /* 2249 * Makefile wasn't found in same directory as included makefile. 2250 * Search for it first on the -I search path, 2251 * then on the .PATH search path, if not found in a -I directory. 2252 * If we have a suffix specific path we should use that. 2253 */ 2254 char *suff; 2255 Lst suffPath = NULL; 2256 2257 if ((suff = strrchr(file, '.'))) { 2258 suffPath = Suff_GetPath(suff); 2259 if (suffPath != NULL) { 2260 fullname = Dir_FindFile(file, suffPath); 2261 } 2262 } 2263 if (fullname == NULL) { 2264 fullname = Dir_FindFile(file, parseIncPath); 2265 if (fullname == NULL) { 2266 fullname = Dir_FindFile(file, dirSearchPath); 2267 } 2268 } 2269 } 2270 } 2271 2272 /* Looking for a system file or file still not found */ 2273 if (fullname == NULL) { 2274 /* 2275 * Look for it on the system path 2276 */ 2277 fullname = Dir_FindFile(file, 2278 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath); 2279 } 2280 2281 if (fullname == NULL) { 2282 if (!silent) 2283 Parse_Error(PARSE_FATAL, "Could not find %s", file); 2284 return; 2285 } 2286 2287 /* Actually open the file... */ 2288 fd = open(fullname, O_RDONLY); 2289 if (fd == -1) { 2290 if (!silent) 2291 Parse_Error(PARSE_FATAL, "Cannot open %s", fullname); 2292 free(fullname); 2293 return; 2294 } 2295 2296 /* load it */ 2297 lf = loadfile(fullname, fd); 2298 2299 ParseSetIncludedFile(); 2300 /* Start reading from this file next */ 2301 Parse_SetInput(fullname, 0, -1, loadedfile_nextbuf, lf); 2302 curFile->lf = lf; 2303 if (depinc) 2304 doing_depend = depinc; /* only turn it on */ 2305 } 2306 2307 static void 2308 ParseDoInclude(char *line) 2309 { 2310 char endc; /* the character which ends the file spec */ 2311 char *cp; /* current position in file spec */ 2312 int silent = *line != 'i'; 2313 char *file = &line[7 + silent]; 2314 2315 /* Skip to delimiter character so we know where to look */ 2316 while (*file == ' ' || *file == '\t') 2317 file++; 2318 2319 if (*file != '"' && *file != '<') { 2320 Parse_Error(PARSE_FATAL, 2321 ".include filename must be delimited by '\"' or '<'"); 2322 return; 2323 } 2324 2325 /* 2326 * Set the search path on which to find the include file based on the 2327 * characters which bracket its name. Angle-brackets imply it's 2328 * a system Makefile while double-quotes imply it's a user makefile 2329 */ 2330 if (*file == '<') { 2331 endc = '>'; 2332 } else { 2333 endc = '"'; 2334 } 2335 2336 /* Skip to matching delimiter */ 2337 for (cp = ++file; *cp && *cp != endc; cp++) 2338 continue; 2339 2340 if (*cp != endc) { 2341 Parse_Error(PARSE_FATAL, 2342 "Unclosed %cinclude filename. '%c' expected", 2343 '.', endc); 2344 return; 2345 } 2346 *cp = '\0'; 2347 2348 /* 2349 * Substitute for any variables in the file name before trying to 2350 * find the thing. 2351 */ 2352 file = Var_Subst(file, VAR_CMD, VARE_WANTRES); 2353 2354 Parse_include_file(file, endc == '>', *line == 'd', silent); 2355 free(file); 2356 } 2357 2358 2359 /*- 2360 *--------------------------------------------------------------------- 2361 * ParseSetIncludedFile -- 2362 * Set the .INCLUDEDFROMFILE variable to the contents of .PARSEFILE 2363 * and the .INCLUDEDFROMDIR variable to the contents of .PARSEDIR 2364 * 2365 * Results: 2366 * None 2367 * 2368 * Side Effects: 2369 * The .INCLUDEDFROMFILE variable is overwritten by the contents 2370 * of .PARSEFILE and the .INCLUDEDFROMDIR variable is overwriten 2371 * by the contents of .PARSEDIR 2372 *--------------------------------------------------------------------- 2373 */ 2374 static void 2375 ParseSetIncludedFile(void) 2376 { 2377 const char *pf, *pd; 2378 char *pf_freeIt, *pd_freeIt; 2379 2380 pf = Var_Value(".PARSEFILE", VAR_GLOBAL, &pf_freeIt); 2381 Var_Set(".INCLUDEDFROMFILE", pf, VAR_GLOBAL); 2382 pd = Var_Value(".PARSEDIR", VAR_GLOBAL, &pd_freeIt); 2383 Var_Set(".INCLUDEDFROMDIR", pd, VAR_GLOBAL); 2384 2385 if (DEBUG(PARSE)) 2386 fprintf(debug_file, "%s: ${.INCLUDEDFROMDIR} = `%s' " 2387 "${.INCLUDEDFROMFILE} = `%s'\n", __func__, pd, pf); 2388 2389 bmake_free(pf_freeIt); 2390 bmake_free(pd_freeIt); 2391 } 2392 /*- 2393 *--------------------------------------------------------------------- 2394 * ParseSetParseFile -- 2395 * Set the .PARSEDIR and .PARSEFILE variables to the dirname and 2396 * basename of the given filename 2397 * 2398 * Results: 2399 * None 2400 * 2401 * Side Effects: 2402 * The .PARSEDIR and .PARSEFILE variables are overwritten by the 2403 * dirname and basename of the given filename. 2404 *--------------------------------------------------------------------- 2405 */ 2406 static void 2407 ParseSetParseFile(const char *filename) 2408 { 2409 char *slash, *dirname; 2410 const char *pd, *pf; 2411 2412 slash = strrchr(filename, '/'); 2413 if (slash == NULL) { 2414 Var_Set(".PARSEDIR", pd = curdir, VAR_GLOBAL); 2415 Var_Set(".PARSEFILE", pf = filename, VAR_GLOBAL); 2416 dirname = NULL; 2417 } else { 2418 dirname = bmake_strsedup(filename, slash); 2419 Var_Set(".PARSEDIR", pd = dirname, VAR_GLOBAL); 2420 Var_Set(".PARSEFILE", pf = slash + 1, VAR_GLOBAL); 2421 } 2422 if (DEBUG(PARSE)) 2423 fprintf(debug_file, "%s: ${.PARSEDIR} = `%s' ${.PARSEFILE} = `%s'\n", 2424 __func__, pd, pf); 2425 free(dirname); 2426 } 2427 2428 /* 2429 * Track the makefiles we read - so makefiles can 2430 * set dependencies on them. 2431 * Avoid adding anything more than once. 2432 */ 2433 2434 static void 2435 ParseTrackInput(const char *name) 2436 { 2437 char *fp = NULL; 2438 2439 const char *old = Var_Value(MAKE_MAKEFILES, VAR_GLOBAL, &fp); 2440 if (old) { 2441 size_t name_len = strlen(name); 2442 const char *ep = old + strlen(old) - name_len; 2443 /* does it contain name? */ 2444 for (; old != NULL; old = strchr(old, ' ')) { 2445 if (*old == ' ') 2446 old++; 2447 if (old >= ep) 2448 break; /* cannot contain name */ 2449 if (memcmp(old, name, name_len) == 0 2450 && (old[name_len] == 0 || old[name_len] == ' ')) 2451 goto cleanup; 2452 } 2453 } 2454 Var_Append (MAKE_MAKEFILES, name, VAR_GLOBAL); 2455 cleanup: 2456 bmake_free(fp); 2457 } 2458 2459 2460 /*- 2461 *--------------------------------------------------------------------- 2462 * Parse_setInput -- 2463 * Start Parsing from the given source 2464 * 2465 * Results: 2466 * None 2467 * 2468 * Side Effects: 2469 * A structure is added to the includes Lst and readProc, lineno, 2470 * fname and curFile are altered for the new file 2471 *--------------------------------------------------------------------- 2472 */ 2473 void 2474 Parse_SetInput(const char *name, int line, int fd, 2475 char *(*nextbuf)(void *, size_t *), void *arg) 2476 { 2477 char *buf; 2478 size_t len; 2479 2480 if (name == NULL) 2481 name = curFile->fname; 2482 else 2483 ParseTrackInput(name); 2484 2485 if (DEBUG(PARSE)) 2486 fprintf(debug_file, "%s: file %s, line %d, fd %d, nextbuf %p, arg %p\n", 2487 __func__, name, line, fd, nextbuf, arg); 2488 2489 if (fd == -1 && nextbuf == NULL) 2490 /* sanity */ 2491 return; 2492 2493 if (curFile != NULL) 2494 /* Save exiting file info */ 2495 Lst_Prepend(includes, curFile); 2496 2497 /* Allocate and fill in new structure */ 2498 curFile = bmake_malloc(sizeof *curFile); 2499 2500 /* 2501 * Once the previous state has been saved, we can get down to reading 2502 * the new file. We set up the name of the file to be the absolute 2503 * name of the include file so error messages refer to the right 2504 * place. 2505 */ 2506 curFile->fname = bmake_strdup(name); 2507 curFile->lineno = line; 2508 curFile->first_lineno = line; 2509 curFile->nextbuf = nextbuf; 2510 curFile->nextbuf_arg = arg; 2511 curFile->lf = NULL; 2512 curFile->depending = doing_depend; /* restore this on EOF */ 2513 2514 assert(nextbuf != NULL); 2515 2516 /* Get first block of input data */ 2517 buf = curFile->nextbuf(curFile->nextbuf_arg, &len); 2518 if (buf == NULL) { 2519 /* Was all a waste of time ... */ 2520 if (curFile->fname) 2521 free(curFile->fname); 2522 free(curFile); 2523 return; 2524 } 2525 curFile->P_str = buf; 2526 curFile->P_ptr = buf; 2527 curFile->P_end = buf+len; 2528 2529 curFile->cond_depth = Cond_save_depth(); 2530 ParseSetParseFile(name); 2531 } 2532 2533 /*- 2534 *----------------------------------------------------------------------- 2535 * IsInclude -- 2536 * Check if the line is an include directive 2537 * 2538 * Results: 2539 * TRUE if it is. 2540 * 2541 * Side Effects: 2542 * None 2543 * 2544 *----------------------------------------------------------------------- 2545 */ 2546 static Boolean 2547 IsInclude(const char *line, Boolean sysv) 2548 { 2549 static const char inc[] = "include"; 2550 static const size_t inclen = sizeof(inc) - 1; 2551 2552 /* 'd' is not valid for sysv */ 2553 int o = strchr(sysv ? "s-" : "ds-", *line) != NULL; 2554 2555 if (strncmp(line + o, inc, inclen) != 0) 2556 return FALSE; 2557 2558 /* Space is not mandatory for BSD .include */ 2559 return !sysv || isspace((unsigned char)line[inclen + o]); 2560 } 2561 2562 2563 #ifdef SYSVINCLUDE 2564 /*- 2565 *----------------------------------------------------------------------- 2566 * IsSysVInclude -- 2567 * Check if the line is a SYSV include directive 2568 * 2569 * Results: 2570 * TRUE if it is. 2571 * 2572 * Side Effects: 2573 * None 2574 * 2575 *----------------------------------------------------------------------- 2576 */ 2577 static Boolean 2578 IsSysVInclude(const char *line) 2579 { 2580 const char *p; 2581 2582 if (!IsInclude(line, TRUE)) 2583 return FALSE; 2584 2585 /* Avoid interpeting a dependency line as an include */ 2586 for (p = line; (p = strchr(p, ':')) != NULL;) { 2587 if (*++p == '\0') { 2588 /* end of line -> dependency */ 2589 return FALSE; 2590 } 2591 if (*p == ':' || isspace((unsigned char)*p)) { 2592 /* :: operator or ': ' -> dependency */ 2593 return FALSE; 2594 } 2595 } 2596 return TRUE; 2597 } 2598 2599 /*- 2600 *--------------------------------------------------------------------- 2601 * ParseTraditionalInclude -- 2602 * Push to another file. 2603 * 2604 * The input is the current line. The file name(s) are 2605 * following the "include". 2606 * 2607 * Results: 2608 * None 2609 * 2610 * Side Effects: 2611 * A structure is added to the includes Lst and readProc, lineno, 2612 * fname and curFILE are altered for the new file 2613 *--------------------------------------------------------------------- 2614 */ 2615 static void 2616 ParseTraditionalInclude(char *line) 2617 { 2618 char *cp; /* current position in file spec */ 2619 int done = 0; 2620 int silent = line[0] != 'i'; 2621 char *file = &line[silent + 7]; 2622 char *all_files; 2623 2624 if (DEBUG(PARSE)) { 2625 fprintf(debug_file, "%s: %s\n", __func__, file); 2626 } 2627 2628 /* 2629 * Skip over whitespace 2630 */ 2631 while (isspace((unsigned char)*file)) 2632 file++; 2633 2634 /* 2635 * Substitute for any variables in the file name before trying to 2636 * find the thing. 2637 */ 2638 all_files = Var_Subst(file, VAR_CMD, VARE_WANTRES); 2639 2640 if (*file == '\0') { 2641 Parse_Error(PARSE_FATAL, 2642 "Filename missing from \"include\""); 2643 goto out; 2644 } 2645 2646 for (file = all_files; !done; file = cp + 1) { 2647 /* Skip to end of line or next whitespace */ 2648 for (cp = file; *cp && !isspace((unsigned char) *cp); cp++) 2649 continue; 2650 2651 if (*cp) 2652 *cp = '\0'; 2653 else 2654 done = 1; 2655 2656 Parse_include_file(file, FALSE, FALSE, silent); 2657 } 2658 out: 2659 free(all_files); 2660 } 2661 #endif 2662 2663 #ifdef GMAKEEXPORT 2664 /*- 2665 *--------------------------------------------------------------------- 2666 * ParseGmakeExport -- 2667 * Parse export <variable>=<value> 2668 * 2669 * And set the environment with it. 2670 * 2671 * Results: 2672 * None 2673 * 2674 * Side Effects: 2675 * None 2676 *--------------------------------------------------------------------- 2677 */ 2678 static void 2679 ParseGmakeExport(char *line) 2680 { 2681 char *variable = &line[6]; 2682 char *value; 2683 2684 if (DEBUG(PARSE)) { 2685 fprintf(debug_file, "%s: %s\n", __func__, variable); 2686 } 2687 2688 /* 2689 * Skip over whitespace 2690 */ 2691 while (isspace((unsigned char)*variable)) 2692 variable++; 2693 2694 for (value = variable; *value && *value != '='; value++) 2695 continue; 2696 2697 if (*value != '=') { 2698 Parse_Error(PARSE_FATAL, 2699 "Variable/Value missing from \"export\""); 2700 return; 2701 } 2702 *value++ = '\0'; /* terminate variable */ 2703 2704 /* 2705 * Expand the value before putting it in the environment. 2706 */ 2707 value = Var_Subst(value, VAR_CMD, VARE_WANTRES); 2708 setenv(variable, value, 1); 2709 free(value); 2710 } 2711 #endif 2712 2713 /*- 2714 *--------------------------------------------------------------------- 2715 * ParseEOF -- 2716 * Called when EOF is reached in the current file. If we were reading 2717 * an include file, the includes stack is popped and things set up 2718 * to go back to reading the previous file at the previous location. 2719 * 2720 * Results: 2721 * CONTINUE if there's more to do. DONE if not. 2722 * 2723 * Side Effects: 2724 * The old curFILE, is closed. The includes list is shortened. 2725 * lineno, curFILE, and fname are changed if CONTINUE is returned. 2726 *--------------------------------------------------------------------- 2727 */ 2728 static int 2729 ParseEOF(void) 2730 { 2731 char *ptr; 2732 size_t len; 2733 2734 assert(curFile->nextbuf != NULL); 2735 2736 doing_depend = curFile->depending; /* restore this */ 2737 /* get next input buffer, if any */ 2738 ptr = curFile->nextbuf(curFile->nextbuf_arg, &len); 2739 curFile->P_ptr = ptr; 2740 curFile->P_str = ptr; 2741 curFile->P_end = ptr + len; 2742 curFile->lineno = curFile->first_lineno; 2743 if (ptr != NULL) { 2744 /* Iterate again */ 2745 return CONTINUE; 2746 } 2747 2748 /* Ensure the makefile (or loop) didn't have mismatched conditionals */ 2749 Cond_restore_depth(curFile->cond_depth); 2750 2751 if (curFile->lf != NULL) { 2752 loadedfile_destroy(curFile->lf); 2753 curFile->lf = NULL; 2754 } 2755 2756 /* Dispose of curFile info */ 2757 /* Leak curFile->fname because all the gnodes have pointers to it */ 2758 free(curFile->P_str); 2759 free(curFile); 2760 2761 if (Lst_IsEmpty(includes)) { 2762 curFile = NULL; 2763 /* We've run out of input */ 2764 Var_Delete(".PARSEDIR", VAR_GLOBAL); 2765 Var_Delete(".PARSEFILE", VAR_GLOBAL); 2766 Var_Delete(".INCLUDEDFROMDIR", VAR_GLOBAL); 2767 Var_Delete(".INCLUDEDFROMFILE", VAR_GLOBAL); 2768 return DONE; 2769 } 2770 2771 curFile = Lst_Dequeue(includes); 2772 if (DEBUG(PARSE)) 2773 fprintf(debug_file, "ParseEOF: returning to file %s, line %d\n", 2774 curFile->fname, curFile->lineno); 2775 2776 /* Restore the PARSEDIR/PARSEFILE variables */ 2777 ParseSetParseFile(curFile->fname); 2778 return CONTINUE; 2779 } 2780 2781 #define PARSE_RAW 1 2782 #define PARSE_SKIP 2 2783 2784 static char * 2785 ParseGetLine(int flags, int *length) 2786 { 2787 IFile *cf = curFile; 2788 char *ptr; 2789 char ch; 2790 char *line; 2791 char *line_end; 2792 char *escaped; 2793 char *comment; 2794 char *tp; 2795 2796 /* Loop through blank lines and comment lines */ 2797 for (;;) { 2798 cf->lineno++; 2799 line = cf->P_ptr; 2800 ptr = line; 2801 line_end = line; 2802 escaped = NULL; 2803 comment = NULL; 2804 for (;;) { 2805 if (cf->P_end != NULL && ptr == cf->P_end) { 2806 /* end of buffer */ 2807 ch = 0; 2808 break; 2809 } 2810 ch = *ptr; 2811 if (ch == 0 || (ch == '\\' && ptr[1] == 0)) { 2812 if (cf->P_end == NULL) 2813 /* End of string (aka for loop) data */ 2814 break; 2815 /* see if there is more we can parse */ 2816 while (ptr++ < cf->P_end) { 2817 if ((ch = *ptr) == '\n') { 2818 if (ptr > line && ptr[-1] == '\\') 2819 continue; 2820 Parse_Error(PARSE_WARNING, 2821 "Zero byte read from file, skipping rest of line."); 2822 break; 2823 } 2824 } 2825 if (cf->nextbuf != NULL) { 2826 /* 2827 * End of this buffer; return EOF and outer logic 2828 * will get the next one. (eww) 2829 */ 2830 break; 2831 } 2832 Parse_Error(PARSE_FATAL, "Zero byte read from file"); 2833 return NULL; 2834 } 2835 2836 if (ch == '\\') { 2837 /* Don't treat next character as special, remember first one */ 2838 if (escaped == NULL) 2839 escaped = ptr; 2840 if (ptr[1] == '\n') 2841 cf->lineno++; 2842 ptr += 2; 2843 line_end = ptr; 2844 continue; 2845 } 2846 if (ch == '#' && comment == NULL) { 2847 /* Remember first '#' for comment stripping */ 2848 /* Unless previous char was '[', as in modifier :[#] */ 2849 if (!(ptr > line && ptr[-1] == '[')) 2850 comment = line_end; 2851 } 2852 ptr++; 2853 if (ch == '\n') 2854 break; 2855 if (!isspace((unsigned char)ch)) 2856 /* We are not interested in trailing whitespace */ 2857 line_end = ptr; 2858 } 2859 2860 /* Save next 'to be processed' location */ 2861 cf->P_ptr = ptr; 2862 2863 /* Check we have a non-comment, non-blank line */ 2864 if (line_end == line || comment == line) { 2865 if (ch == 0) 2866 /* At end of file */ 2867 return NULL; 2868 /* Parse another line */ 2869 continue; 2870 } 2871 2872 /* We now have a line of data */ 2873 *line_end = 0; 2874 2875 if (flags & PARSE_RAW) { 2876 /* Leave '\' (etc) in line buffer (eg 'for' lines) */ 2877 *length = line_end - line; 2878 return line; 2879 } 2880 2881 if (flags & PARSE_SKIP) { 2882 /* Completely ignore non-directives */ 2883 if (line[0] != '.') 2884 continue; 2885 /* We could do more of the .else/.elif/.endif checks here */ 2886 } 2887 break; 2888 } 2889 2890 /* Brutally ignore anything after a non-escaped '#' in non-commands */ 2891 if (comment != NULL && line[0] != '\t') { 2892 line_end = comment; 2893 *line_end = 0; 2894 } 2895 2896 /* If we didn't see a '\\' then the in-situ data is fine */ 2897 if (escaped == NULL) { 2898 *length = line_end - line; 2899 return line; 2900 } 2901 2902 /* Remove escapes from '\n' and '#' */ 2903 tp = ptr = escaped; 2904 escaped = line; 2905 for (; ; *tp++ = ch) { 2906 ch = *ptr++; 2907 if (ch != '\\') { 2908 if (ch == 0) 2909 break; 2910 continue; 2911 } 2912 2913 ch = *ptr++; 2914 if (ch == 0) { 2915 /* Delete '\\' at end of buffer */ 2916 tp--; 2917 break; 2918 } 2919 2920 if (ch == '#' && line[0] != '\t') 2921 /* Delete '\\' from before '#' on non-command lines */ 2922 continue; 2923 2924 if (ch != '\n') { 2925 /* Leave '\\' in buffer for later */ 2926 *tp++ = '\\'; 2927 /* Make sure we don't delete an escaped ' ' from the line end */ 2928 escaped = tp + 1; 2929 continue; 2930 } 2931 2932 /* Escaped '\n' replace following whitespace with a single ' ' */ 2933 while (ptr[0] == ' ' || ptr[0] == '\t') 2934 ptr++; 2935 ch = ' '; 2936 } 2937 2938 /* Delete any trailing spaces - eg from empty continuations */ 2939 while (tp > escaped && isspace((unsigned char)tp[-1])) 2940 tp--; 2941 2942 *tp = 0; 2943 *length = tp - line; 2944 return line; 2945 } 2946 2947 /*- 2948 *--------------------------------------------------------------------- 2949 * ParseReadLine -- 2950 * Read an entire line from the input file. Called only by Parse_File. 2951 * 2952 * Results: 2953 * A line w/o its newline 2954 * 2955 * Side Effects: 2956 * Only those associated with reading a character 2957 *--------------------------------------------------------------------- 2958 */ 2959 static char * 2960 ParseReadLine(void) 2961 { 2962 char *line; /* Result */ 2963 int lineLength; /* Length of result */ 2964 int lineno; /* Saved line # */ 2965 int rval; 2966 2967 for (;;) { 2968 line = ParseGetLine(0, &lineLength); 2969 if (line == NULL) 2970 return NULL; 2971 2972 if (line[0] != '.') 2973 return line; 2974 2975 /* 2976 * The line might be a conditional. Ask the conditional module 2977 * about it and act accordingly 2978 */ 2979 switch (Cond_Eval(line)) { 2980 case COND_SKIP: 2981 /* Skip to next conditional that evaluates to COND_PARSE. */ 2982 do { 2983 line = ParseGetLine(PARSE_SKIP, &lineLength); 2984 } while (line && Cond_Eval(line) != COND_PARSE); 2985 if (line == NULL) 2986 break; 2987 continue; 2988 case COND_PARSE: 2989 continue; 2990 case COND_INVALID: /* Not a conditional line */ 2991 /* Check for .for loops */ 2992 rval = For_Eval(line); 2993 if (rval == 0) 2994 /* Not a .for line */ 2995 break; 2996 if (rval < 0) 2997 /* Syntax error - error printed, ignore line */ 2998 continue; 2999 /* Start of a .for loop */ 3000 lineno = curFile->lineno; 3001 /* Accumulate loop lines until matching .endfor */ 3002 do { 3003 line = ParseGetLine(PARSE_RAW, &lineLength); 3004 if (line == NULL) { 3005 Parse_Error(PARSE_FATAL, 3006 "Unexpected end of file in for loop."); 3007 break; 3008 } 3009 } while (For_Accum(line)); 3010 /* Stash each iteration as a new 'input file' */ 3011 For_Run(lineno); 3012 /* Read next line from for-loop buffer */ 3013 continue; 3014 } 3015 return line; 3016 } 3017 } 3018 3019 /*- 3020 *----------------------------------------------------------------------- 3021 * ParseFinishLine -- 3022 * Handle the end of a dependency group. 3023 * 3024 * Results: 3025 * Nothing. 3026 * 3027 * Side Effects: 3028 * inLine set FALSE. 'targets' list destroyed. 3029 * 3030 *----------------------------------------------------------------------- 3031 */ 3032 static void 3033 ParseFinishLine(void) 3034 { 3035 if (inLine) { 3036 if (targets != NULL) { 3037 Lst_ForEach(targets, Suff_EndTransform, NULL); 3038 Lst_Destroy(targets, ParseHasCommands); 3039 } 3040 targets = NULL; 3041 inLine = FALSE; 3042 } 3043 } 3044 3045 3046 /*- 3047 *--------------------------------------------------------------------- 3048 * Parse_File -- 3049 * Parse a file into its component parts, incorporating it into the 3050 * current dependency graph. This is the main function and controls 3051 * almost every other function in this module 3052 * 3053 * Input: 3054 * name the name of the file being read 3055 * fd Open file to makefile to parse 3056 * 3057 * Results: 3058 * None 3059 * 3060 * Side Effects: 3061 * closes fd. 3062 * Loads. Nodes are added to the list of all targets, nodes and links 3063 * are added to the dependency graph. etc. etc. etc. 3064 *--------------------------------------------------------------------- 3065 */ 3066 void 3067 Parse_File(const char *name, int fd) 3068 { 3069 char *cp; /* pointer into the line */ 3070 char *line; /* the line we're working on */ 3071 struct loadedfile *lf; 3072 3073 lf = loadfile(name, fd); 3074 3075 inLine = FALSE; 3076 fatals = 0; 3077 3078 if (name == NULL) 3079 name = "(stdin)"; 3080 3081 Parse_SetInput(name, 0, -1, loadedfile_nextbuf, lf); 3082 curFile->lf = lf; 3083 3084 do { 3085 for (; (line = ParseReadLine()) != NULL; ) { 3086 if (DEBUG(PARSE)) 3087 fprintf(debug_file, "ParseReadLine (%d): '%s'\n", 3088 curFile->lineno, line); 3089 if (*line == '.') { 3090 /* 3091 * Lines that begin with the special character may be 3092 * include or undef directives. 3093 * On the other hand they can be suffix rules (.c.o: ...) 3094 * or just dependencies for filenames that start '.'. 3095 */ 3096 for (cp = line + 1; isspace((unsigned char)*cp); cp++) { 3097 continue; 3098 } 3099 if (IsInclude(cp, FALSE)) { 3100 ParseDoInclude(cp); 3101 continue; 3102 } 3103 if (strncmp(cp, "undef", 5) == 0) { 3104 char *cp2; 3105 for (cp += 5; isspace((unsigned char) *cp); cp++) 3106 continue; 3107 for (cp2 = cp; !isspace((unsigned char) *cp2) && 3108 *cp2 != '\0'; cp2++) 3109 continue; 3110 *cp2 = '\0'; 3111 Var_Delete(cp, VAR_GLOBAL); 3112 continue; 3113 } else if (strncmp(cp, "export", 6) == 0) { 3114 for (cp += 6; isspace((unsigned char) *cp); cp++) 3115 continue; 3116 Var_Export(cp, TRUE); 3117 continue; 3118 } else if (strncmp(cp, "unexport", 8) == 0) { 3119 Var_UnExport(cp); 3120 continue; 3121 } else if (strncmp(cp, "info", 4) == 0 || 3122 strncmp(cp, "error", 5) == 0 || 3123 strncmp(cp, "warning", 7) == 0) { 3124 if (ParseMessage(cp)) 3125 continue; 3126 } 3127 } 3128 3129 if (*line == '\t') { 3130 /* 3131 * If a line starts with a tab, it can only hope to be 3132 * a creation command. 3133 */ 3134 cp = line + 1; 3135 shellCommand: 3136 for (; isspace ((unsigned char)*cp); cp++) { 3137 continue; 3138 } 3139 if (*cp) { 3140 if (!inLine) 3141 Parse_Error(PARSE_FATAL, 3142 "Unassociated shell command \"%s\"", 3143 cp); 3144 /* 3145 * So long as it's not a blank line and we're actually 3146 * in a dependency spec, add the command to the list of 3147 * commands of all targets in the dependency spec 3148 */ 3149 if (targets) { 3150 cp = bmake_strdup(cp); 3151 Lst_ForEach(targets, ParseAddCmd, cp); 3152 #ifdef CLEANUP 3153 Lst_Append(targCmds, cp); 3154 #endif 3155 } 3156 } 3157 continue; 3158 } 3159 3160 #ifdef SYSVINCLUDE 3161 if (IsSysVInclude(line)) { 3162 /* 3163 * It's an S3/S5-style "include". 3164 */ 3165 ParseTraditionalInclude(line); 3166 continue; 3167 } 3168 #endif 3169 #ifdef GMAKEEXPORT 3170 if (strncmp(line, "export", 6) == 0 && 3171 isspace((unsigned char) line[6]) && 3172 strchr(line, ':') == NULL) { 3173 /* 3174 * It's a Gmake "export". 3175 */ 3176 ParseGmakeExport(line); 3177 continue; 3178 } 3179 #endif 3180 if (Parse_IsVar(line)) { 3181 ParseFinishLine(); 3182 Parse_DoVar(line, VAR_GLOBAL); 3183 continue; 3184 } 3185 3186 #ifndef POSIX 3187 /* 3188 * To make life easier on novices, if the line is indented we 3189 * first make sure the line has a dependency operator in it. 3190 * If it doesn't have an operator and we're in a dependency 3191 * line's script, we assume it's actually a shell command 3192 * and add it to the current list of targets. 3193 */ 3194 cp = line; 3195 if (isspace((unsigned char) line[0])) { 3196 while (isspace((unsigned char) *cp)) 3197 cp++; 3198 while (*cp && (ParseIsEscaped(line, cp) || 3199 *cp != ':' && *cp != '!')) { 3200 cp++; 3201 } 3202 if (*cp == '\0') { 3203 if (inLine) { 3204 Parse_Error(PARSE_WARNING, 3205 "Shell command needs a leading tab"); 3206 goto shellCommand; 3207 } 3208 } 3209 } 3210 #endif 3211 ParseFinishLine(); 3212 3213 /* 3214 * For some reason - probably to make the parser impossible - 3215 * a ';' can be used to separate commands from dependencies. 3216 * Attempt to avoid ';' inside substitution patterns. 3217 */ 3218 { 3219 int level = 0; 3220 3221 for (cp = line; *cp != 0; cp++) { 3222 if (*cp == '\\' && cp[1] != 0) { 3223 cp++; 3224 continue; 3225 } 3226 if (*cp == '$' && 3227 (cp[1] == '(' || cp[1] == '{')) { 3228 level++; 3229 continue; 3230 } 3231 if (level > 0) { 3232 if (*cp == ')' || *cp == '}') { 3233 level--; 3234 continue; 3235 } 3236 } else if (*cp == ';') { 3237 break; 3238 } 3239 } 3240 } 3241 if (*cp != 0) 3242 /* Terminate the dependency list at the ';' */ 3243 *cp++ = 0; 3244 else 3245 cp = NULL; 3246 3247 /* 3248 * We now know it's a dependency line so it needs to have all 3249 * variables expanded before being parsed. Tell the variable 3250 * module to complain if some variable is undefined... 3251 */ 3252 line = Var_Subst(line, VAR_CMD, VARE_UNDEFERR|VARE_WANTRES); 3253 3254 /* 3255 * Need a non-circular list for the target nodes 3256 */ 3257 if (targets != NULL) 3258 Lst_Free(targets); 3259 3260 targets = Lst_Init(); 3261 inLine = TRUE; 3262 3263 ParseDoDependency(line); 3264 free(line); 3265 3266 /* If there were commands after a ';', add them now */ 3267 if (cp != NULL) { 3268 goto shellCommand; 3269 } 3270 } 3271 /* 3272 * Reached EOF, but it may be just EOF of an include file... 3273 */ 3274 } while (ParseEOF() == CONTINUE); 3275 3276 if (fatals) { 3277 (void)fflush(stdout); 3278 (void)fprintf(stderr, 3279 "%s: Fatal errors encountered -- cannot continue", 3280 progname); 3281 PrintOnError(NULL, NULL); 3282 exit(1); 3283 } 3284 } 3285 3286 /*- 3287 *--------------------------------------------------------------------- 3288 * Parse_Init -- 3289 * initialize the parsing module 3290 * 3291 * Results: 3292 * none 3293 * 3294 * Side Effects: 3295 * the parseIncPath list is initialized... 3296 *--------------------------------------------------------------------- 3297 */ 3298 void 3299 Parse_Init(void) 3300 { 3301 mainNode = NULL; 3302 parseIncPath = Lst_Init(); 3303 sysIncPath = Lst_Init(); 3304 defIncPath = Lst_Init(); 3305 includes = Lst_Init(); 3306 #ifdef CLEANUP 3307 targCmds = Lst_Init(); 3308 #endif 3309 } 3310 3311 void 3312 Parse_End(void) 3313 { 3314 #ifdef CLEANUP 3315 Lst_Destroy(targCmds, free); 3316 if (targets) 3317 Lst_Free(targets); 3318 Lst_Destroy(defIncPath, Dir_Destroy); 3319 Lst_Destroy(sysIncPath, Dir_Destroy); 3320 Lst_Destroy(parseIncPath, Dir_Destroy); 3321 Lst_Free(includes); /* Should be empty now */ 3322 #endif 3323 } 3324 3325 3326 /*- 3327 *----------------------------------------------------------------------- 3328 * Parse_MainName -- 3329 * Return a Lst of the main target to create for main()'s sake. If 3330 * no such target exists, we Punt with an obnoxious error message. 3331 * 3332 * Results: 3333 * A Lst of the single node to create. 3334 * 3335 * Side Effects: 3336 * None. 3337 * 3338 *----------------------------------------------------------------------- 3339 */ 3340 Lst 3341 Parse_MainName(void) 3342 { 3343 Lst mainList; /* result list */ 3344 3345 mainList = Lst_Init(); 3346 3347 if (mainNode == NULL) { 3348 Punt("no target to make."); 3349 /*NOTREACHED*/ 3350 } else if (mainNode->type & OP_DOUBLEDEP) { 3351 Lst_Append(mainList, mainNode); 3352 Lst_AppendAll(mainList, mainNode->cohorts); 3353 } 3354 else 3355 Lst_Append(mainList, mainNode); 3356 Var_Append(".TARGETS", mainNode->name, VAR_GLOBAL); 3357 return mainList; 3358 } 3359 3360 /*- 3361 *----------------------------------------------------------------------- 3362 * ParseMark -- 3363 * Add the filename and lineno to the GNode so that we remember 3364 * where it was first defined. 3365 * 3366 * Side Effects: 3367 * None. 3368 * 3369 *----------------------------------------------------------------------- 3370 */ 3371 static void 3372 ParseMark(GNode *gn) 3373 { 3374 gn->fname = curFile->fname; 3375 gn->lineno = curFile->lineno; 3376 } 3377