1 /* $NetBSD: parse.c,v 1.205 2015/10/11 04:51:24 sjg 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 1.205 2015/10/11 04:51:24 sjg 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 1.205 2015/10/11 04:51:24 sjg 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 <assert.h> 129 #include <ctype.h> 130 #include <errno.h> 131 #include <fcntl.h> 132 #include <stdarg.h> 133 #include <stdio.h> 134 135 #include "make.h" 136 #include "hash.h" 137 #include "dir.h" 138 #include "job.h" 139 #include "buf.h" 140 #include "pathnames.h" 141 142 #ifdef HAVE_MMAP 143 #include <sys/mman.h> 144 145 #ifndef MAP_COPY 146 #define MAP_COPY MAP_PRIVATE 147 #endif 148 #ifndef MAP_FILE 149 #define MAP_FILE 0 150 #endif 151 #endif 152 153 //////////////////////////////////////////////////////////// 154 // types and constants 155 156 /* 157 * Structure for a file being read ("included file") 158 */ 159 typedef struct IFile { 160 char *fname; /* name of file */ 161 int lineno; /* current line number in file */ 162 int first_lineno; /* line number of start of text */ 163 int cond_depth; /* 'if' nesting when file opened */ 164 char *P_str; /* point to base of string buffer */ 165 char *P_ptr; /* point to next char of string buffer */ 166 char *P_end; /* point to the end of string buffer */ 167 char *(*nextbuf)(void *, size_t *); /* Function to get more data */ 168 void *nextbuf_arg; /* Opaque arg for nextbuf() */ 169 struct loadedfile *lf; /* loadedfile object, if any */ 170 } IFile; 171 172 173 /* 174 * These values are returned by ParseEOF to tell Parse_File whether to 175 * CONTINUE parsing, i.e. it had only reached the end of an include file, 176 * or if it's DONE. 177 */ 178 #define CONTINUE 1 179 #define DONE 0 180 181 /* 182 * Tokens for target attributes 183 */ 184 typedef enum { 185 Begin, /* .BEGIN */ 186 Default, /* .DEFAULT */ 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 //////////////////////////////////////////////////////////// 230 // result data 231 232 /* 233 * The main target to create. This is the first target on the first 234 * dependency line in the first makefile. 235 */ 236 static GNode *mainNode; 237 238 //////////////////////////////////////////////////////////// 239 // eval state 240 241 /* targets we're working on */ 242 static Lst targets; 243 244 #ifdef CLEANUP 245 /* command lines for targets */ 246 static Lst targCmds; 247 #endif 248 249 /* 250 * specType contains the SPECial TYPE of the current target. It is 251 * Not if the target is unspecial. If it *is* special, however, the children 252 * are linked as children of the parent but not vice versa. This variable is 253 * set in ParseDoDependency 254 */ 255 static ParseSpecial specType; 256 257 /* 258 * Predecessor node for handling .ORDER. Initialized to NULL when .ORDER 259 * seen, then set to each successive source on the line. 260 */ 261 static GNode *predecessor; 262 263 //////////////////////////////////////////////////////////// 264 // parser state 265 266 /* true if currently in a dependency line or its commands */ 267 static Boolean inLine; 268 269 /* number of fatal errors */ 270 static int fatals = 0; 271 272 /* 273 * Variables for doing includes 274 */ 275 276 /* current file being read */ 277 static IFile *curFile; 278 279 /* stack of IFiles generated by .includes */ 280 static Lst includes; 281 282 /* include paths (lists of directories) */ 283 Lst parseIncPath; /* dirs for "..." includes */ 284 Lst sysIncPath; /* dirs for <...> includes */ 285 Lst defIncPath; /* default for sysIncPath */ 286 287 //////////////////////////////////////////////////////////// 288 // parser tables 289 290 /* 291 * The parseKeywords table is searched using binary search when deciding 292 * if a target or source is special. The 'spec' field is the ParseSpecial 293 * type of the keyword ("Not" if the keyword isn't special as a target) while 294 * the 'op' field is the operator to apply to the list of targets if the 295 * keyword is used as a source ("0" if the keyword isn't special as a source) 296 */ 297 static const struct { 298 const char *name; /* Name of keyword */ 299 ParseSpecial spec; /* Type when used as a target */ 300 int op; /* Operator when used as a source */ 301 } parseKeywords[] = { 302 { ".BEGIN", Begin, 0 }, 303 { ".DEFAULT", Default, 0 }, 304 { ".END", End, 0 }, 305 { ".ERROR", dotError, 0 }, 306 { ".EXEC", Attribute, OP_EXEC }, 307 { ".IGNORE", Ignore, OP_IGNORE }, 308 { ".INCLUDES", Includes, 0 }, 309 { ".INTERRUPT", Interrupt, 0 }, 310 { ".INVISIBLE", Attribute, OP_INVISIBLE }, 311 { ".JOIN", Attribute, OP_JOIN }, 312 { ".LIBS", Libs, 0 }, 313 { ".MADE", Attribute, OP_MADE }, 314 { ".MAIN", Main, 0 }, 315 { ".MAKE", Attribute, OP_MAKE }, 316 { ".MAKEFLAGS", MFlags, 0 }, 317 { ".META", Meta, OP_META }, 318 { ".MFLAGS", MFlags, 0 }, 319 { ".NOMETA", NoMeta, OP_NOMETA }, 320 { ".NOMETA_CMP", NoMetaCmp, OP_NOMETA_CMP }, 321 { ".NOPATH", NoPath, OP_NOPATH }, 322 { ".NOTMAIN", Attribute, OP_NOTMAIN }, 323 { ".NOTPARALLEL", NotParallel, 0 }, 324 { ".NO_PARALLEL", NotParallel, 0 }, 325 { ".NULL", Null, 0 }, 326 { ".OBJDIR", ExObjdir, 0 }, 327 { ".OPTIONAL", Attribute, OP_OPTIONAL }, 328 { ".ORDER", Order, 0 }, 329 { ".PARALLEL", Parallel, 0 }, 330 { ".PATH", ExPath, 0 }, 331 { ".PHONY", Phony, OP_PHONY }, 332 #ifdef POSIX 333 { ".POSIX", Posix, 0 }, 334 #endif 335 { ".PRECIOUS", Precious, OP_PRECIOUS }, 336 { ".RECURSIVE", Attribute, OP_MAKE }, 337 { ".SHELL", ExShell, 0 }, 338 { ".SILENT", Silent, OP_SILENT }, 339 { ".SINGLESHELL", SingleShell, 0 }, 340 { ".STALE", Stale, 0 }, 341 { ".SUFFIXES", Suffixes, 0 }, 342 { ".USE", Attribute, OP_USE }, 343 { ".USEBEFORE", Attribute, OP_USEBEFORE }, 344 { ".WAIT", Wait, 0 }, 345 }; 346 347 //////////////////////////////////////////////////////////// 348 // local functions 349 350 static int ParseIsEscaped(const char *, const char *); 351 static void ParseErrorInternal(const char *, size_t, int, const char *, ...) 352 MAKE_ATTR_PRINTFLIKE(4,5); 353 static void ParseVErrorInternal(FILE *, const char *, size_t, int, const char *, va_list) 354 MAKE_ATTR_PRINTFLIKE(5, 0); 355 static int ParseFindKeyword(const char *); 356 static int ParseLinkSrc(void *, void *); 357 static int ParseDoOp(void *, void *); 358 static void ParseDoSrc(int, const char *); 359 static int ParseFindMain(void *, void *); 360 static int ParseAddDir(void *, void *); 361 static int ParseClearPath(void *, void *); 362 static void ParseDoDependency(char *); 363 static int ParseAddCmd(void *, void *); 364 static void ParseHasCommands(void *); 365 static void ParseDoInclude(char *); 366 static void ParseSetParseFile(const char *); 367 static void ParseSetIncludedFile(void); 368 #ifdef SYSVINCLUDE 369 static void ParseTraditionalInclude(char *); 370 #endif 371 #ifdef GMAKEEXPORT 372 static void ParseGmakeExport(char *); 373 #endif 374 static int ParseEOF(void); 375 static char *ParseReadLine(void); 376 static void ParseFinishLine(void); 377 static void ParseMark(GNode *); 378 379 //////////////////////////////////////////////////////////// 380 // file loader 381 382 struct loadedfile { 383 const char *path; /* name, for error reports */ 384 char *buf; /* contents buffer */ 385 size_t len; /* length of contents */ 386 size_t maplen; /* length of mmap area, or 0 */ 387 Boolean used; /* XXX: have we used the data yet */ 388 }; 389 390 /* 391 * Constructor/destructor for loadedfile 392 */ 393 static struct loadedfile * 394 loadedfile_create(const char *path) 395 { 396 struct loadedfile *lf; 397 398 lf = bmake_malloc(sizeof(*lf)); 399 lf->path = (path == NULL ? "(stdin)" : path); 400 lf->buf = NULL; 401 lf->len = 0; 402 lf->maplen = 0; 403 lf->used = FALSE; 404 return lf; 405 } 406 407 static void 408 loadedfile_destroy(struct loadedfile *lf) 409 { 410 if (lf->buf != NULL) { 411 if (lf->maplen > 0) { 412 #ifdef HAVE_MMAP 413 munmap(lf->buf, lf->maplen); 414 #endif 415 } else { 416 free(lf->buf); 417 } 418 } 419 free(lf); 420 } 421 422 /* 423 * nextbuf() operation for loadedfile, as needed by the weird and twisted 424 * logic below. Once that's cleaned up, we can get rid of lf->used... 425 */ 426 static char * 427 loadedfile_nextbuf(void *x, size_t *len) 428 { 429 struct loadedfile *lf = x; 430 431 if (lf->used) { 432 return NULL; 433 } 434 lf->used = TRUE; 435 *len = lf->len; 436 return lf->buf; 437 } 438 439 /* 440 * Try to get the size of a file. 441 */ 442 static ReturnStatus 443 load_getsize(int fd, size_t *ret) 444 { 445 struct stat st; 446 447 if (fstat(fd, &st) < 0) { 448 return FAILURE; 449 } 450 451 if (!S_ISREG(st.st_mode)) { 452 return FAILURE; 453 } 454 455 /* 456 * st_size is an off_t, which is 64 bits signed; *ret is 457 * size_t, which might be 32 bits unsigned or 64 bits 458 * unsigned. Rather than being elaborate, just punt on 459 * files that are more than 2^31 bytes. We should never 460 * see a makefile that size in practice... 461 * 462 * While we're at it reject negative sizes too, just in case. 463 */ 464 if (st.st_size < 0 || st.st_size > 0x7fffffff) { 465 return FAILURE; 466 } 467 468 *ret = (size_t) st.st_size; 469 return SUCCESS; 470 } 471 472 /* 473 * Read in a file. 474 * 475 * Until the path search logic can be moved under here instead of 476 * being in the caller in another source file, we need to have the fd 477 * passed in already open. Bleh. 478 * 479 * If the path is NULL use stdin and (to insure against fd leaks) 480 * assert that the caller passed in -1. 481 */ 482 static struct loadedfile * 483 loadfile(const char *path, int fd) 484 { 485 struct loadedfile *lf; 486 #ifdef HAVE_MMAP 487 long pagesize; 488 #endif 489 ssize_t result; 490 size_t bufpos; 491 492 lf = loadedfile_create(path); 493 494 if (path == NULL) { 495 assert(fd == -1); 496 fd = STDIN_FILENO; 497 } else { 498 #if 0 /* notyet */ 499 fd = open(path, O_RDONLY); 500 if (fd < 0) { 501 ... 502 Error("%s: %s", path, strerror(errno)); 503 exit(1); 504 } 505 #endif 506 } 507 508 #ifdef HAVE_MMAP 509 if (load_getsize(fd, &lf->len) == SUCCESS) { 510 /* found a size, try mmap */ 511 pagesize = sysconf(_SC_PAGESIZE); 512 if (pagesize <= 0) { 513 pagesize = 0x1000; 514 } 515 /* round size up to a page */ 516 lf->maplen = pagesize * ((lf->len + pagesize - 1)/pagesize); 517 518 /* 519 * XXX hack for dealing with empty files; remove when 520 * we're no longer limited by interfacing to the old 521 * logic elsewhere in this file. 522 */ 523 if (lf->maplen == 0) { 524 lf->maplen = pagesize; 525 } 526 527 /* 528 * FUTURE: remove PROT_WRITE when the parser no longer 529 * needs to scribble on the input. 530 */ 531 lf->buf = mmap(NULL, lf->maplen, PROT_READ|PROT_WRITE, 532 MAP_FILE|MAP_COPY, fd, 0); 533 if (lf->buf != MAP_FAILED) { 534 /* succeeded */ 535 if (lf->len == lf->maplen && lf->buf[lf->len - 1] != '\n') { 536 char *b = malloc(lf->len + 1); 537 b[lf->len] = '\n'; 538 memcpy(b, lf->buf, lf->len++); 539 munmap(lf->buf, lf->maplen); 540 lf->maplen = 0; 541 lf->buf = b; 542 } 543 goto done; 544 } 545 } 546 #endif 547 /* cannot mmap; load the traditional way */ 548 549 lf->maplen = 0; 550 lf->len = 1024; 551 lf->buf = bmake_malloc(lf->len); 552 553 bufpos = 0; 554 while (1) { 555 assert(bufpos <= lf->len); 556 if (bufpos == lf->len) { 557 lf->len *= 2; 558 lf->buf = bmake_realloc(lf->buf, lf->len); 559 } 560 result = read(fd, lf->buf + bufpos, lf->len - bufpos); 561 if (result < 0) { 562 Error("%s: read error: %s", path, strerror(errno)); 563 exit(1); 564 } 565 if (result == 0) { 566 break; 567 } 568 bufpos += result; 569 } 570 assert(bufpos <= lf->len); 571 lf->len = bufpos; 572 573 /* truncate malloc region to actual length (maybe not useful) */ 574 if (lf->len > 0) { 575 lf->buf = bmake_realloc(lf->buf, lf->len); 576 } 577 578 #ifdef HAVE_MMAP 579 done: 580 #endif 581 if (path != NULL) { 582 close(fd); 583 } 584 return lf; 585 } 586 587 //////////////////////////////////////////////////////////// 588 // old code 589 590 /*- 591 *---------------------------------------------------------------------- 592 * ParseIsEscaped -- 593 * Check if the current character is escaped on the current line 594 * 595 * Results: 596 * 0 if the character is not backslash escaped, 1 otherwise 597 * 598 * Side Effects: 599 * None 600 *---------------------------------------------------------------------- 601 */ 602 static int 603 ParseIsEscaped(const char *line, const char *c) 604 { 605 int active = 0; 606 for (;;) { 607 if (line == c) 608 return active; 609 if (*--c != '\\') 610 return active; 611 active = !active; 612 } 613 } 614 615 /*- 616 *---------------------------------------------------------------------- 617 * ParseFindKeyword -- 618 * Look in the table of keywords for one matching the given string. 619 * 620 * Input: 621 * str String to find 622 * 623 * Results: 624 * The index of the keyword, or -1 if it isn't there. 625 * 626 * Side Effects: 627 * None 628 *---------------------------------------------------------------------- 629 */ 630 static int 631 ParseFindKeyword(const char *str) 632 { 633 int start, end, cur; 634 int diff; 635 636 start = 0; 637 end = (sizeof(parseKeywords)/sizeof(parseKeywords[0])) - 1; 638 639 do { 640 cur = start + ((end - start) / 2); 641 diff = strcmp(str, parseKeywords[cur].name); 642 643 if (diff == 0) { 644 return (cur); 645 } else if (diff < 0) { 646 end = cur - 1; 647 } else { 648 start = cur + 1; 649 } 650 } while (start <= end); 651 return (-1); 652 } 653 654 /*- 655 * ParseVErrorInternal -- 656 * Error message abort function for parsing. Prints out the context 657 * of the error (line number and file) as well as the message with 658 * two optional arguments. 659 * 660 * Results: 661 * None 662 * 663 * Side Effects: 664 * "fatals" is incremented if the level is PARSE_FATAL. 665 */ 666 /* VARARGS */ 667 static void 668 ParseVErrorInternal(FILE *f, const char *cfname, size_t clineno, int type, 669 const char *fmt, va_list ap) 670 { 671 static Boolean fatal_warning_error_printed = FALSE; 672 673 (void)fprintf(f, "%s: ", progname); 674 675 if (cfname != NULL) { 676 (void)fprintf(f, "\""); 677 if (*cfname != '/' && strcmp(cfname, "(stdin)") != 0) { 678 char *cp; 679 const char *dir; 680 681 /* 682 * Nothing is more annoying than not knowing 683 * which Makefile is the culprit. 684 */ 685 dir = Var_Value(".PARSEDIR", VAR_GLOBAL, &cp); 686 if (dir == NULL || *dir == '\0' || 687 (*dir == '.' && dir[1] == '\0')) 688 dir = Var_Value(".CURDIR", VAR_GLOBAL, &cp); 689 if (dir == NULL) 690 dir = "."; 691 692 (void)fprintf(f, "%s/%s", dir, cfname); 693 } else 694 (void)fprintf(f, "%s", cfname); 695 696 (void)fprintf(f, "\" line %d: ", (int)clineno); 697 } 698 if (type == PARSE_WARNING) 699 (void)fprintf(f, "warning: "); 700 (void)vfprintf(f, fmt, ap); 701 (void)fprintf(f, "\n"); 702 (void)fflush(f); 703 if (type == PARSE_FATAL || parseWarnFatal) 704 fatals += 1; 705 if (parseWarnFatal && !fatal_warning_error_printed) { 706 Error("parsing warnings being treated as errors"); 707 fatal_warning_error_printed = TRUE; 708 } 709 } 710 711 /*- 712 * ParseErrorInternal -- 713 * Error function 714 * 715 * Results: 716 * None 717 * 718 * Side Effects: 719 * None 720 */ 721 /* VARARGS */ 722 static void 723 ParseErrorInternal(const char *cfname, size_t clineno, int type, 724 const char *fmt, ...) 725 { 726 va_list ap; 727 728 va_start(ap, fmt); 729 (void)fflush(stdout); 730 ParseVErrorInternal(stderr, cfname, clineno, type, fmt, ap); 731 va_end(ap); 732 733 if (debug_file != stderr && debug_file != stdout) { 734 va_start(ap, fmt); 735 ParseVErrorInternal(debug_file, cfname, clineno, type, fmt, ap); 736 va_end(ap); 737 } 738 } 739 740 /*- 741 * Parse_Error -- 742 * External interface to ParseErrorInternal; uses the default filename 743 * Line number. 744 * 745 * Results: 746 * None 747 * 748 * Side Effects: 749 * None 750 */ 751 /* VARARGS */ 752 void 753 Parse_Error(int type, const char *fmt, ...) 754 { 755 va_list ap; 756 const char *fname; 757 size_t lineno; 758 759 if (curFile == NULL) { 760 fname = NULL; 761 lineno = 0; 762 } else { 763 fname = curFile->fname; 764 lineno = curFile->lineno; 765 } 766 767 va_start(ap, fmt); 768 (void)fflush(stdout); 769 ParseVErrorInternal(stderr, fname, lineno, type, fmt, ap); 770 va_end(ap); 771 772 if (debug_file != stderr && debug_file != stdout) { 773 va_start(ap, fmt); 774 ParseVErrorInternal(debug_file, fname, lineno, type, fmt, ap); 775 va_end(ap); 776 } 777 } 778 779 780 /* 781 * ParseMessage 782 * Parse a .info .warning or .error directive 783 * 784 * The input is the line minus the ".". We substitute 785 * variables, print the message and exit(1) (for .error) or just print 786 * a warning if the directive is malformed. 787 */ 788 static Boolean 789 ParseMessage(char *line) 790 { 791 int mtype; 792 793 switch(*line) { 794 case 'i': 795 mtype = 0; 796 break; 797 case 'w': 798 mtype = PARSE_WARNING; 799 break; 800 case 'e': 801 mtype = PARSE_FATAL; 802 break; 803 default: 804 Parse_Error(PARSE_WARNING, "invalid syntax: \".%s\"", line); 805 return FALSE; 806 } 807 808 while (isalpha((u_char)*line)) 809 line++; 810 if (!isspace((u_char)*line)) 811 return FALSE; /* not for us */ 812 while (isspace((u_char)*line)) 813 line++; 814 815 line = Var_Subst(NULL, line, VAR_CMD, FALSE, TRUE); 816 Parse_Error(mtype, "%s", line); 817 free(line); 818 819 if (mtype == PARSE_FATAL) { 820 /* Terminate immediately. */ 821 exit(1); 822 } 823 return TRUE; 824 } 825 826 /*- 827 *--------------------------------------------------------------------- 828 * ParseLinkSrc -- 829 * Link the parent node to its new child. Used in a Lst_ForEach by 830 * ParseDoDependency. If the specType isn't 'Not', the parent 831 * isn't linked as a parent of the child. 832 * 833 * Input: 834 * pgnp The parent node 835 * cgpn The child node 836 * 837 * Results: 838 * Always = 0 839 * 840 * Side Effects: 841 * New elements are added to the parents list of cgn and the 842 * children list of cgn. the unmade field of pgn is updated 843 * to reflect the additional child. 844 *--------------------------------------------------------------------- 845 */ 846 static int 847 ParseLinkSrc(void *pgnp, void *cgnp) 848 { 849 GNode *pgn = (GNode *)pgnp; 850 GNode *cgn = (GNode *)cgnp; 851 852 if ((pgn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (pgn->cohorts)) 853 pgn = (GNode *)Lst_Datum(Lst_Last(pgn->cohorts)); 854 (void)Lst_AtEnd(pgn->children, cgn); 855 if (specType == Not) 856 (void)Lst_AtEnd(cgn->parents, pgn); 857 pgn->unmade += 1; 858 if (DEBUG(PARSE)) { 859 fprintf(debug_file, "# %s: added child %s - %s\n", __func__, 860 pgn->name, cgn->name); 861 Targ_PrintNode(pgn, 0); 862 Targ_PrintNode(cgn, 0); 863 } 864 return (0); 865 } 866 867 /*- 868 *--------------------------------------------------------------------- 869 * ParseDoOp -- 870 * Apply the parsed operator to the given target node. Used in a 871 * Lst_ForEach call by ParseDoDependency once all targets have 872 * been found and their operator parsed. If the previous and new 873 * operators are incompatible, a major error is taken. 874 * 875 * Input: 876 * gnp The node to which the operator is to be applied 877 * opp The operator to apply 878 * 879 * Results: 880 * Always 0 881 * 882 * Side Effects: 883 * The type field of the node is altered to reflect any new bits in 884 * the op. 885 *--------------------------------------------------------------------- 886 */ 887 static int 888 ParseDoOp(void *gnp, void *opp) 889 { 890 GNode *gn = (GNode *)gnp; 891 int op = *(int *)opp; 892 /* 893 * If the dependency mask of the operator and the node don't match and 894 * the node has actually had an operator applied to it before, and 895 * the operator actually has some dependency information in it, complain. 896 */ 897 if (((op & OP_OPMASK) != (gn->type & OP_OPMASK)) && 898 !OP_NOP(gn->type) && !OP_NOP(op)) 899 { 900 Parse_Error(PARSE_FATAL, "Inconsistent operator for %s", gn->name); 901 return (1); 902 } 903 904 if ((op == OP_DOUBLEDEP) && ((gn->type & OP_OPMASK) == OP_DOUBLEDEP)) { 905 /* 906 * If the node was the object of a :: operator, we need to create a 907 * new instance of it for the children and commands on this dependency 908 * line. The new instance is placed on the 'cohorts' list of the 909 * initial one (note the initial one is not on its own cohorts list) 910 * and the new instance is linked to all parents of the initial 911 * instance. 912 */ 913 GNode *cohort; 914 915 /* 916 * Propagate copied bits to the initial node. They'll be propagated 917 * back to the rest of the cohorts later. 918 */ 919 gn->type |= op & ~OP_OPMASK; 920 921 cohort = Targ_FindNode(gn->name, TARG_NOHASH); 922 if (doing_depend) 923 ParseMark(cohort); 924 /* 925 * Make the cohort invisible as well to avoid duplicating it into 926 * other variables. True, parents of this target won't tend to do 927 * anything with their local variables, but better safe than 928 * sorry. (I think this is pointless now, since the relevant list 929 * traversals will no longer see this node anyway. -mycroft) 930 */ 931 cohort->type = op | OP_INVISIBLE; 932 (void)Lst_AtEnd(gn->cohorts, cohort); 933 cohort->centurion = gn; 934 gn->unmade_cohorts += 1; 935 snprintf(cohort->cohort_num, sizeof cohort->cohort_num, "#%d", 936 gn->unmade_cohorts); 937 } else { 938 /* 939 * We don't want to nuke any previous flags (whatever they were) so we 940 * just OR the new operator into the old 941 */ 942 gn->type |= op; 943 } 944 945 return (0); 946 } 947 948 /*- 949 *--------------------------------------------------------------------- 950 * ParseDoSrc -- 951 * Given the name of a source, figure out if it is an attribute 952 * and apply it to the targets if it is. Else decide if there is 953 * some attribute which should be applied *to* the source because 954 * of some special target and apply it if so. Otherwise, make the 955 * source be a child of the targets in the list 'targets' 956 * 957 * Input: 958 * tOp operator (if any) from special targets 959 * src name of the source to handle 960 * 961 * Results: 962 * None 963 * 964 * Side Effects: 965 * Operator bits may be added to the list of targets or to the source. 966 * The targets may have a new source added to their lists of children. 967 *--------------------------------------------------------------------- 968 */ 969 static void 970 ParseDoSrc(int tOp, const char *src) 971 { 972 GNode *gn = NULL; 973 static int wait_number = 0; 974 char wait_src[16]; 975 976 if (*src == '.' && isupper ((unsigned char)src[1])) { 977 int keywd = ParseFindKeyword(src); 978 if (keywd != -1) { 979 int op = parseKeywords[keywd].op; 980 if (op != 0) { 981 Lst_ForEach(targets, ParseDoOp, &op); 982 return; 983 } 984 if (parseKeywords[keywd].spec == Wait) { 985 /* 986 * We add a .WAIT node in the dependency list. 987 * After any dynamic dependencies (and filename globbing) 988 * have happened, it is given a dependency on the each 989 * previous child back to and previous .WAIT node. 990 * The next child won't be scheduled until the .WAIT node 991 * is built. 992 * We give each .WAIT node a unique name (mainly for diag). 993 */ 994 snprintf(wait_src, sizeof wait_src, ".WAIT_%u", ++wait_number); 995 gn = Targ_FindNode(wait_src, TARG_NOHASH); 996 if (doing_depend) 997 ParseMark(gn); 998 gn->type = OP_WAIT | OP_PHONY | OP_DEPENDS | OP_NOTMAIN; 999 Lst_ForEach(targets, ParseLinkSrc, gn); 1000 return; 1001 } 1002 } 1003 } 1004 1005 switch (specType) { 1006 case Main: 1007 /* 1008 * If we have noted the existence of a .MAIN, it means we need 1009 * to add the sources of said target to the list of things 1010 * to create. The string 'src' is likely to be free, so we 1011 * must make a new copy of it. Note that this will only be 1012 * invoked if the user didn't specify a target on the command 1013 * line. This is to allow #ifmake's to succeed, or something... 1014 */ 1015 (void)Lst_AtEnd(create, bmake_strdup(src)); 1016 /* 1017 * Add the name to the .TARGETS variable as well, so the user can 1018 * employ that, if desired. 1019 */ 1020 Var_Append(".TARGETS", src, VAR_GLOBAL); 1021 return; 1022 1023 case Order: 1024 /* 1025 * Create proper predecessor/successor links between the previous 1026 * source and the current one. 1027 */ 1028 gn = Targ_FindNode(src, TARG_CREATE); 1029 if (doing_depend) 1030 ParseMark(gn); 1031 if (predecessor != NULL) { 1032 (void)Lst_AtEnd(predecessor->order_succ, gn); 1033 (void)Lst_AtEnd(gn->order_pred, predecessor); 1034 if (DEBUG(PARSE)) { 1035 fprintf(debug_file, "# %s: added Order dependency %s - %s\n", 1036 __func__, predecessor->name, gn->name); 1037 Targ_PrintNode(predecessor, 0); 1038 Targ_PrintNode(gn, 0); 1039 } 1040 } 1041 /* 1042 * The current source now becomes the predecessor for the next one. 1043 */ 1044 predecessor = gn; 1045 break; 1046 1047 default: 1048 /* 1049 * If the source is not an attribute, we need to find/create 1050 * a node for it. After that we can apply any operator to it 1051 * from a special target or link it to its parents, as 1052 * appropriate. 1053 * 1054 * In the case of a source that was the object of a :: operator, 1055 * the attribute is applied to all of its instances (as kept in 1056 * the 'cohorts' list of the node) or all the cohorts are linked 1057 * to all the targets. 1058 */ 1059 1060 /* Find/create the 'src' node and attach to all targets */ 1061 gn = Targ_FindNode(src, TARG_CREATE); 1062 if (doing_depend) 1063 ParseMark(gn); 1064 if (tOp) { 1065 gn->type |= tOp; 1066 } else { 1067 Lst_ForEach(targets, ParseLinkSrc, gn); 1068 } 1069 break; 1070 } 1071 } 1072 1073 /*- 1074 *----------------------------------------------------------------------- 1075 * ParseFindMain -- 1076 * Find a real target in the list and set it to be the main one. 1077 * Called by ParseDoDependency when a main target hasn't been found 1078 * yet. 1079 * 1080 * Input: 1081 * gnp Node to examine 1082 * 1083 * Results: 1084 * 0 if main not found yet, 1 if it is. 1085 * 1086 * Side Effects: 1087 * mainNode is changed and Targ_SetMain is called. 1088 * 1089 *----------------------------------------------------------------------- 1090 */ 1091 static int 1092 ParseFindMain(void *gnp, void *dummy) 1093 { 1094 GNode *gn = (GNode *)gnp; 1095 if ((gn->type & OP_NOTARGET) == 0) { 1096 mainNode = gn; 1097 Targ_SetMain(gn); 1098 return (dummy ? 1 : 1); 1099 } else { 1100 return (dummy ? 0 : 0); 1101 } 1102 } 1103 1104 /*- 1105 *----------------------------------------------------------------------- 1106 * ParseAddDir -- 1107 * Front-end for Dir_AddDir to make sure Lst_ForEach keeps going 1108 * 1109 * Results: 1110 * === 0 1111 * 1112 * Side Effects: 1113 * See Dir_AddDir. 1114 * 1115 *----------------------------------------------------------------------- 1116 */ 1117 static int 1118 ParseAddDir(void *path, void *name) 1119 { 1120 (void)Dir_AddDir((Lst) path, (char *)name); 1121 return(0); 1122 } 1123 1124 /*- 1125 *----------------------------------------------------------------------- 1126 * ParseClearPath -- 1127 * Front-end for Dir_ClearPath to make sure Lst_ForEach keeps going 1128 * 1129 * Results: 1130 * === 0 1131 * 1132 * Side Effects: 1133 * See Dir_ClearPath 1134 * 1135 *----------------------------------------------------------------------- 1136 */ 1137 static int 1138 ParseClearPath(void *path, void *dummy) 1139 { 1140 Dir_ClearPath((Lst) path); 1141 return(dummy ? 0 : 0); 1142 } 1143 1144 /*- 1145 *--------------------------------------------------------------------- 1146 * ParseDoDependency -- 1147 * Parse the dependency line in line. 1148 * 1149 * Input: 1150 * line the line to parse 1151 * 1152 * Results: 1153 * None 1154 * 1155 * Side Effects: 1156 * The nodes of the sources are linked as children to the nodes of the 1157 * targets. Some nodes may be created. 1158 * 1159 * We parse a dependency line by first extracting words from the line and 1160 * finding nodes in the list of all targets with that name. This is done 1161 * until a character is encountered which is an operator character. Currently 1162 * these are only ! and :. At this point the operator is parsed and the 1163 * pointer into the line advanced until the first source is encountered. 1164 * The parsed operator is applied to each node in the 'targets' list, 1165 * which is where the nodes found for the targets are kept, by means of 1166 * the ParseDoOp function. 1167 * The sources are read in much the same way as the targets were except 1168 * that now they are expanded using the wildcarding scheme of the C-Shell 1169 * and all instances of the resulting words in the list of all targets 1170 * are found. Each of the resulting nodes is then linked to each of the 1171 * targets as one of its children. 1172 * Certain targets are handled specially. These are the ones detailed 1173 * by the specType variable. 1174 * The storing of transformation rules is also taken care of here. 1175 * A target is recognized as a transformation rule by calling 1176 * Suff_IsTransform. If it is a transformation rule, its node is gotten 1177 * from the suffix module via Suff_AddTransform rather than the standard 1178 * Targ_FindNode in the target module. 1179 *--------------------------------------------------------------------- 1180 */ 1181 static void 1182 ParseDoDependency(char *line) 1183 { 1184 char *cp; /* our current position */ 1185 GNode *gn = NULL; /* a general purpose temporary node */ 1186 int op; /* the operator on the line */ 1187 char savec; /* a place to save a character */ 1188 Lst paths; /* List of search paths to alter when parsing 1189 * a list of .PATH targets */ 1190 int tOp; /* operator from special target */ 1191 Lst sources; /* list of archive source names after 1192 * expansion */ 1193 Lst curTargs; /* list of target names to be found and added 1194 * to the targets list */ 1195 char *lstart = line; 1196 1197 if (DEBUG(PARSE)) 1198 fprintf(debug_file, "ParseDoDependency(%s)\n", line); 1199 tOp = 0; 1200 1201 specType = Not; 1202 paths = NULL; 1203 1204 curTargs = Lst_Init(FALSE); 1205 1206 /* 1207 * First, grind through the targets. 1208 */ 1209 1210 do { 1211 /* 1212 * Here LINE points to the beginning of the next word, and 1213 * LSTART points to the actual beginning of the line. 1214 */ 1215 1216 /* Find the end of the next word. */ 1217 for (cp = line; *cp && (ParseIsEscaped(lstart, cp) || 1218 !(isspace((unsigned char)*cp) || 1219 *cp == '!' || *cp == ':' || *cp == LPAREN)); 1220 cp++) { 1221 if (*cp == '$') { 1222 /* 1223 * Must be a dynamic source (would have been expanded 1224 * otherwise), so call the Var module to parse the puppy 1225 * so we can safely advance beyond it...There should be 1226 * no errors in this, as they would have been discovered 1227 * in the initial Var_Subst and we wouldn't be here. 1228 */ 1229 int length; 1230 void *freeIt; 1231 1232 (void)Var_Parse(cp, VAR_CMD, TRUE, TRUE, &length, &freeIt); 1233 if (freeIt) 1234 free(freeIt); 1235 cp += length-1; 1236 } 1237 } 1238 1239 /* 1240 * If the word is followed by a left parenthesis, it's the 1241 * name of an object file inside an archive (ar file). 1242 */ 1243 if (!ParseIsEscaped(lstart, cp) && *cp == LPAREN) { 1244 /* 1245 * Archives must be handled specially to make sure the OP_ARCHV 1246 * flag is set in their 'type' field, for one thing, and because 1247 * things like "archive(file1.o file2.o file3.o)" are permissible. 1248 * Arch_ParseArchive will set 'line' to be the first non-blank 1249 * after the archive-spec. It creates/finds nodes for the members 1250 * and places them on the given list, returning SUCCESS if all 1251 * went well and FAILURE if there was an error in the 1252 * specification. On error, line should remain untouched. 1253 */ 1254 if (Arch_ParseArchive(&line, targets, VAR_CMD) != SUCCESS) { 1255 Parse_Error(PARSE_FATAL, 1256 "Error in archive specification: \"%s\"", line); 1257 goto out; 1258 } else { 1259 /* Done with this word; on to the next. */ 1260 continue; 1261 } 1262 } 1263 1264 if (!*cp) { 1265 /* 1266 * We got to the end of the line while we were still 1267 * looking at targets. 1268 * 1269 * Ending a dependency line without an operator is a Bozo 1270 * no-no. As a heuristic, this is also often triggered by 1271 * undetected conflicts from cvs/rcs merges. 1272 */ 1273 if ((strncmp(line, "<<<<<<", 6) == 0) || 1274 (strncmp(line, "======", 6) == 0) || 1275 (strncmp(line, ">>>>>>", 6) == 0)) 1276 Parse_Error(PARSE_FATAL, 1277 "Makefile appears to contain unresolved cvs/rcs/??? merge conflicts"); 1278 else 1279 Parse_Error(PARSE_FATAL, lstart[0] == '.' ? "Unknown directive" 1280 : "Need an operator"); 1281 goto out; 1282 } 1283 1284 /* Insert a null terminator. */ 1285 savec = *cp; 1286 *cp = '\0'; 1287 1288 /* 1289 * Got the word. See if it's a special target and if so set 1290 * specType to match it. 1291 */ 1292 if (*line == '.' && isupper ((unsigned char)line[1])) { 1293 /* 1294 * See if the target is a special target that must have it 1295 * or its sources handled specially. 1296 */ 1297 int keywd = ParseFindKeyword(line); 1298 if (keywd != -1) { 1299 if (specType == ExPath && parseKeywords[keywd].spec != ExPath) { 1300 Parse_Error(PARSE_FATAL, "Mismatched special targets"); 1301 goto out; 1302 } 1303 1304 specType = parseKeywords[keywd].spec; 1305 tOp = parseKeywords[keywd].op; 1306 1307 /* 1308 * Certain special targets have special semantics: 1309 * .PATH Have to set the dirSearchPath 1310 * variable too 1311 * .MAIN Its sources are only used if 1312 * nothing has been specified to 1313 * create. 1314 * .DEFAULT Need to create a node to hang 1315 * commands on, but we don't want 1316 * it in the graph, nor do we want 1317 * it to be the Main Target, so we 1318 * create it, set OP_NOTMAIN and 1319 * add it to the list, setting 1320 * DEFAULT to the new node for 1321 * later use. We claim the node is 1322 * A transformation rule to make 1323 * life easier later, when we'll 1324 * use Make_HandleUse to actually 1325 * apply the .DEFAULT commands. 1326 * .PHONY The list of targets 1327 * .NOPATH Don't search for file in the path 1328 * .STALE 1329 * .BEGIN 1330 * .END 1331 * .ERROR 1332 * .INTERRUPT Are not to be considered the 1333 * main target. 1334 * .NOTPARALLEL Make only one target at a time. 1335 * .SINGLESHELL Create a shell for each command. 1336 * .ORDER Must set initial predecessor to NULL 1337 */ 1338 switch (specType) { 1339 case ExPath: 1340 if (paths == NULL) { 1341 paths = Lst_Init(FALSE); 1342 } 1343 (void)Lst_AtEnd(paths, dirSearchPath); 1344 break; 1345 case Main: 1346 if (!Lst_IsEmpty(create)) { 1347 specType = Not; 1348 } 1349 break; 1350 case Begin: 1351 case End: 1352 case Stale: 1353 case dotError: 1354 case Interrupt: 1355 gn = Targ_FindNode(line, TARG_CREATE); 1356 if (doing_depend) 1357 ParseMark(gn); 1358 gn->type |= OP_NOTMAIN|OP_SPECIAL; 1359 (void)Lst_AtEnd(targets, gn); 1360 break; 1361 case Default: 1362 gn = Targ_NewGN(".DEFAULT"); 1363 gn->type |= (OP_NOTMAIN|OP_TRANSFORM); 1364 (void)Lst_AtEnd(targets, gn); 1365 DEFAULT = gn; 1366 break; 1367 case NotParallel: 1368 maxJobs = 1; 1369 break; 1370 case SingleShell: 1371 compatMake = TRUE; 1372 break; 1373 case Order: 1374 predecessor = NULL; 1375 break; 1376 default: 1377 break; 1378 } 1379 } else if (strncmp(line, ".PATH", 5) == 0) { 1380 /* 1381 * .PATH<suffix> has to be handled specially. 1382 * Call on the suffix module to give us a path to 1383 * modify. 1384 */ 1385 Lst path; 1386 1387 specType = ExPath; 1388 path = Suff_GetPath(&line[5]); 1389 if (path == NULL) { 1390 Parse_Error(PARSE_FATAL, 1391 "Suffix '%s' not defined (yet)", 1392 &line[5]); 1393 goto out; 1394 } else { 1395 if (paths == NULL) { 1396 paths = Lst_Init(FALSE); 1397 } 1398 (void)Lst_AtEnd(paths, path); 1399 } 1400 } 1401 } 1402 1403 /* 1404 * Have word in line. Get or create its node and stick it at 1405 * the end of the targets list 1406 */ 1407 if ((specType == Not) && (*line != '\0')) { 1408 if (Dir_HasWildcards(line)) { 1409 /* 1410 * Targets are to be sought only in the current directory, 1411 * so create an empty path for the thing. Note we need to 1412 * use Dir_Destroy in the destruction of the path as the 1413 * Dir module could have added a directory to the path... 1414 */ 1415 Lst emptyPath = Lst_Init(FALSE); 1416 1417 Dir_Expand(line, emptyPath, curTargs); 1418 1419 Lst_Destroy(emptyPath, Dir_Destroy); 1420 } else { 1421 /* 1422 * No wildcards, but we want to avoid code duplication, 1423 * so create a list with the word on it. 1424 */ 1425 (void)Lst_AtEnd(curTargs, line); 1426 } 1427 1428 /* Apply the targets. */ 1429 1430 while(!Lst_IsEmpty(curTargs)) { 1431 char *targName = (char *)Lst_DeQueue(curTargs); 1432 1433 if (!Suff_IsTransform (targName)) { 1434 gn = Targ_FindNode(targName, TARG_CREATE); 1435 } else { 1436 gn = Suff_AddTransform(targName); 1437 } 1438 if (doing_depend) 1439 ParseMark(gn); 1440 1441 (void)Lst_AtEnd(targets, gn); 1442 } 1443 } else if (specType == ExPath && *line != '.' && *line != '\0') { 1444 Parse_Error(PARSE_WARNING, "Extra target (%s) ignored", line); 1445 } 1446 1447 /* Don't need the inserted null terminator any more. */ 1448 *cp = savec; 1449 1450 /* 1451 * If it is a special type and not .PATH, it's the only target we 1452 * allow on this line... 1453 */ 1454 if (specType != Not && specType != ExPath) { 1455 Boolean warning = FALSE; 1456 1457 while (*cp && (ParseIsEscaped(lstart, cp) || 1458 ((*cp != '!') && (*cp != ':')))) { 1459 if (ParseIsEscaped(lstart, cp) || 1460 (*cp != ' ' && *cp != '\t')) { 1461 warning = TRUE; 1462 } 1463 cp++; 1464 } 1465 if (warning) { 1466 Parse_Error(PARSE_WARNING, "Extra target ignored"); 1467 } 1468 } else { 1469 while (*cp && isspace ((unsigned char)*cp)) { 1470 cp++; 1471 } 1472 } 1473 line = cp; 1474 } while (*line && (ParseIsEscaped(lstart, line) || 1475 ((*line != '!') && (*line != ':')))); 1476 1477 /* 1478 * Don't need the list of target names anymore... 1479 */ 1480 Lst_Destroy(curTargs, NULL); 1481 curTargs = NULL; 1482 1483 if (!Lst_IsEmpty(targets)) { 1484 switch(specType) { 1485 default: 1486 Parse_Error(PARSE_WARNING, "Special and mundane targets don't mix. Mundane ones ignored"); 1487 break; 1488 case Default: 1489 case Stale: 1490 case Begin: 1491 case End: 1492 case dotError: 1493 case Interrupt: 1494 /* 1495 * These four create nodes on which to hang commands, so 1496 * targets shouldn't be empty... 1497 */ 1498 case Not: 1499 /* 1500 * Nothing special here -- targets can be empty if it wants. 1501 */ 1502 break; 1503 } 1504 } 1505 1506 /* 1507 * Have now parsed all the target names. Must parse the operator next. The 1508 * result is left in op . 1509 */ 1510 if (*cp == '!') { 1511 op = OP_FORCE; 1512 } else if (*cp == ':') { 1513 if (cp[1] == ':') { 1514 op = OP_DOUBLEDEP; 1515 cp++; 1516 } else { 1517 op = OP_DEPENDS; 1518 } 1519 } else { 1520 Parse_Error(PARSE_FATAL, lstart[0] == '.' ? "Unknown directive" 1521 : "Missing dependency operator"); 1522 goto out; 1523 } 1524 1525 /* Advance beyond the operator */ 1526 cp++; 1527 1528 /* 1529 * Apply the operator to the target. This is how we remember which 1530 * operator a target was defined with. It fails if the operator 1531 * used isn't consistent across all references. 1532 */ 1533 Lst_ForEach(targets, ParseDoOp, &op); 1534 1535 /* 1536 * Onward to the sources. 1537 * 1538 * LINE will now point to the first source word, if any, or the 1539 * end of the string if not. 1540 */ 1541 while (*cp && isspace ((unsigned char)*cp)) { 1542 cp++; 1543 } 1544 line = cp; 1545 1546 /* 1547 * Several special targets take different actions if present with no 1548 * sources: 1549 * a .SUFFIXES line with no sources clears out all old suffixes 1550 * a .PRECIOUS line makes all targets precious 1551 * a .IGNORE line ignores errors for all targets 1552 * a .SILENT line creates silence when making all targets 1553 * a .PATH removes all directories from the search path(s). 1554 */ 1555 if (!*line) { 1556 switch (specType) { 1557 case Suffixes: 1558 Suff_ClearSuffixes(); 1559 break; 1560 case Precious: 1561 allPrecious = TRUE; 1562 break; 1563 case Ignore: 1564 ignoreErrors = TRUE; 1565 break; 1566 case Silent: 1567 beSilent = TRUE; 1568 break; 1569 case ExPath: 1570 Lst_ForEach(paths, ParseClearPath, NULL); 1571 Dir_SetPATH(); 1572 break; 1573 #ifdef POSIX 1574 case Posix: 1575 Var_Set("%POSIX", "1003.2", VAR_GLOBAL, 0); 1576 break; 1577 #endif 1578 default: 1579 break; 1580 } 1581 } else if (specType == MFlags) { 1582 /* 1583 * Call on functions in main.c to deal with these arguments and 1584 * set the initial character to a null-character so the loop to 1585 * get sources won't get anything 1586 */ 1587 Main_ParseArgLine(line); 1588 *line = '\0'; 1589 } else if (specType == ExShell) { 1590 if (Job_ParseShell(line) != SUCCESS) { 1591 Parse_Error(PARSE_FATAL, "improper shell specification"); 1592 goto out; 1593 } 1594 *line = '\0'; 1595 } else if ((specType == NotParallel) || (specType == SingleShell)) { 1596 *line = '\0'; 1597 } 1598 1599 /* 1600 * NOW GO FOR THE SOURCES 1601 */ 1602 if ((specType == Suffixes) || (specType == ExPath) || 1603 (specType == Includes) || (specType == Libs) || 1604 (specType == Null) || (specType == ExObjdir)) 1605 { 1606 while (*line) { 1607 /* 1608 * If the target was one that doesn't take files as its sources 1609 * but takes something like suffixes, we take each 1610 * space-separated word on the line as a something and deal 1611 * with it accordingly. 1612 * 1613 * If the target was .SUFFIXES, we take each source as a 1614 * suffix and add it to the list of suffixes maintained by the 1615 * Suff module. 1616 * 1617 * If the target was a .PATH, we add the source as a directory 1618 * to search on the search path. 1619 * 1620 * If it was .INCLUDES, the source is taken to be the suffix of 1621 * files which will be #included and whose search path should 1622 * be present in the .INCLUDES variable. 1623 * 1624 * If it was .LIBS, the source is taken to be the suffix of 1625 * files which are considered libraries and whose search path 1626 * should be present in the .LIBS variable. 1627 * 1628 * If it was .NULL, the source is the suffix to use when a file 1629 * has no valid suffix. 1630 * 1631 * If it was .OBJDIR, the source is a new definition for .OBJDIR, 1632 * and will cause make to do a new chdir to that path. 1633 */ 1634 while (*cp && !isspace ((unsigned char)*cp)) { 1635 cp++; 1636 } 1637 savec = *cp; 1638 *cp = '\0'; 1639 switch (specType) { 1640 case Suffixes: 1641 Suff_AddSuffix(line, &mainNode); 1642 break; 1643 case ExPath: 1644 Lst_ForEach(paths, ParseAddDir, line); 1645 break; 1646 case Includes: 1647 Suff_AddInclude(line); 1648 break; 1649 case Libs: 1650 Suff_AddLib(line); 1651 break; 1652 case Null: 1653 Suff_SetNull(line); 1654 break; 1655 case ExObjdir: 1656 Main_SetObjdir(line); 1657 break; 1658 default: 1659 break; 1660 } 1661 *cp = savec; 1662 if (savec != '\0') { 1663 cp++; 1664 } 1665 while (*cp && isspace ((unsigned char)*cp)) { 1666 cp++; 1667 } 1668 line = cp; 1669 } 1670 if (paths) { 1671 Lst_Destroy(paths, NULL); 1672 } 1673 if (specType == ExPath) 1674 Dir_SetPATH(); 1675 } else { 1676 while (*line) { 1677 /* 1678 * The targets take real sources, so we must beware of archive 1679 * specifications (i.e. things with left parentheses in them) 1680 * and handle them accordingly. 1681 */ 1682 for (; *cp && !isspace ((unsigned char)*cp); cp++) { 1683 if ((*cp == LPAREN) && (cp > line) && (cp[-1] != '$')) { 1684 /* 1685 * Only stop for a left parenthesis if it isn't at the 1686 * start of a word (that'll be for variable changes 1687 * later) and isn't preceded by a dollar sign (a dynamic 1688 * source). 1689 */ 1690 break; 1691 } 1692 } 1693 1694 if (*cp == LPAREN) { 1695 sources = Lst_Init(FALSE); 1696 if (Arch_ParseArchive(&line, sources, VAR_CMD) != SUCCESS) { 1697 Parse_Error(PARSE_FATAL, 1698 "Error in source archive spec \"%s\"", line); 1699 goto out; 1700 } 1701 1702 while (!Lst_IsEmpty (sources)) { 1703 gn = (GNode *)Lst_DeQueue(sources); 1704 ParseDoSrc(tOp, gn->name); 1705 } 1706 Lst_Destroy(sources, NULL); 1707 cp = line; 1708 } else { 1709 if (*cp) { 1710 *cp = '\0'; 1711 cp += 1; 1712 } 1713 1714 ParseDoSrc(tOp, line); 1715 } 1716 while (*cp && isspace ((unsigned char)*cp)) { 1717 cp++; 1718 } 1719 line = cp; 1720 } 1721 } 1722 1723 if (mainNode == NULL) { 1724 /* 1725 * If we have yet to decide on a main target to make, in the 1726 * absence of any user input, we want the first target on 1727 * the first dependency line that is actually a real target 1728 * (i.e. isn't a .USE or .EXEC rule) to be made. 1729 */ 1730 Lst_ForEach(targets, ParseFindMain, NULL); 1731 } 1732 1733 out: 1734 if (curTargs) 1735 Lst_Destroy(curTargs, NULL); 1736 } 1737 1738 /*- 1739 *--------------------------------------------------------------------- 1740 * Parse_IsVar -- 1741 * Return TRUE if the passed line is a variable assignment. A variable 1742 * assignment consists of a single word followed by optional whitespace 1743 * followed by either a += or an = operator. 1744 * This function is used both by the Parse_File function and main when 1745 * parsing the command-line arguments. 1746 * 1747 * Input: 1748 * line the line to check 1749 * 1750 * Results: 1751 * TRUE if it is. FALSE if it ain't 1752 * 1753 * Side Effects: 1754 * none 1755 *--------------------------------------------------------------------- 1756 */ 1757 Boolean 1758 Parse_IsVar(char *line) 1759 { 1760 Boolean wasSpace = FALSE; /* set TRUE if found a space */ 1761 char ch; 1762 int level = 0; 1763 #define ISEQOPERATOR(c) \ 1764 (((c) == '+') || ((c) == ':') || ((c) == '?') || ((c) == '!')) 1765 1766 /* 1767 * Skip to variable name 1768 */ 1769 for (;(*line == ' ') || (*line == '\t'); line++) 1770 continue; 1771 1772 /* Scan for one of the assignment operators outside a variable expansion */ 1773 while ((ch = *line++) != 0) { 1774 if (ch == '(' || ch == '{') { 1775 level++; 1776 continue; 1777 } 1778 if (ch == ')' || ch == '}') { 1779 level--; 1780 continue; 1781 } 1782 if (level != 0) 1783 continue; 1784 while (ch == ' ' || ch == '\t') { 1785 ch = *line++; 1786 wasSpace = TRUE; 1787 } 1788 #ifdef SUNSHCMD 1789 if (ch == ':' && strncmp(line, "sh", 2) == 0) { 1790 line += 2; 1791 continue; 1792 } 1793 #endif 1794 if (ch == '=') 1795 return TRUE; 1796 if (*line == '=' && ISEQOPERATOR(ch)) 1797 return TRUE; 1798 if (wasSpace) 1799 return FALSE; 1800 } 1801 1802 return FALSE; 1803 } 1804 1805 /*- 1806 *--------------------------------------------------------------------- 1807 * Parse_DoVar -- 1808 * Take the variable assignment in the passed line and do it in the 1809 * global context. 1810 * 1811 * Note: There is a lexical ambiguity with assignment modifier characters 1812 * in variable names. This routine interprets the character before the = 1813 * as a modifier. Therefore, an assignment like 1814 * C++=/usr/bin/CC 1815 * is interpreted as "C+ +=" instead of "C++ =". 1816 * 1817 * Input: 1818 * line a line guaranteed to be a variable assignment. 1819 * This reduces error checks 1820 * ctxt Context in which to do the assignment 1821 * 1822 * Results: 1823 * none 1824 * 1825 * Side Effects: 1826 * the variable structure of the given variable name is altered in the 1827 * global context. 1828 *--------------------------------------------------------------------- 1829 */ 1830 void 1831 Parse_DoVar(char *line, GNode *ctxt) 1832 { 1833 char *cp; /* pointer into line */ 1834 enum { 1835 VAR_SUBST, VAR_APPEND, VAR_SHELL, VAR_NORMAL 1836 } type; /* Type of assignment */ 1837 char *opc; /* ptr to operator character to 1838 * null-terminate the variable name */ 1839 Boolean freeCp = FALSE; /* TRUE if cp needs to be freed, 1840 * i.e. if any variable expansion was 1841 * performed */ 1842 int depth; 1843 1844 /* 1845 * Skip to variable name 1846 */ 1847 while ((*line == ' ') || (*line == '\t')) { 1848 line++; 1849 } 1850 1851 /* 1852 * Skip to operator character, nulling out whitespace as we go 1853 * XXX Rather than counting () and {} we should look for $ and 1854 * then expand the variable. 1855 */ 1856 for (depth = 0, cp = line + 1; depth != 0 || *cp != '='; cp++) { 1857 if (*cp == '(' || *cp == '{') { 1858 depth++; 1859 continue; 1860 } 1861 if (*cp == ')' || *cp == '}') { 1862 depth--; 1863 continue; 1864 } 1865 if (depth == 0 && isspace ((unsigned char)*cp)) { 1866 *cp = '\0'; 1867 } 1868 } 1869 opc = cp-1; /* operator is the previous character */ 1870 *cp++ = '\0'; /* nuke the = */ 1871 1872 /* 1873 * Check operator type 1874 */ 1875 switch (*opc) { 1876 case '+': 1877 type = VAR_APPEND; 1878 *opc = '\0'; 1879 break; 1880 1881 case '?': 1882 /* 1883 * If the variable already has a value, we don't do anything. 1884 */ 1885 *opc = '\0'; 1886 if (Var_Exists(line, ctxt)) { 1887 return; 1888 } else { 1889 type = VAR_NORMAL; 1890 } 1891 break; 1892 1893 case ':': 1894 type = VAR_SUBST; 1895 *opc = '\0'; 1896 break; 1897 1898 case '!': 1899 type = VAR_SHELL; 1900 *opc = '\0'; 1901 break; 1902 1903 default: 1904 #ifdef SUNSHCMD 1905 while (opc > line && *opc != ':') 1906 opc--; 1907 1908 if (strncmp(opc, ":sh", 3) == 0) { 1909 type = VAR_SHELL; 1910 *opc = '\0'; 1911 break; 1912 } 1913 #endif 1914 type = VAR_NORMAL; 1915 break; 1916 } 1917 1918 while (isspace ((unsigned char)*cp)) { 1919 cp++; 1920 } 1921 1922 if (type == VAR_APPEND) { 1923 Var_Append(line, cp, ctxt); 1924 } else if (type == VAR_SUBST) { 1925 /* 1926 * Allow variables in the old value to be undefined, but leave their 1927 * invocation alone -- this is done by forcing oldVars to be false. 1928 * XXX: This can cause recursive variables, but that's not hard to do, 1929 * and this allows someone to do something like 1930 * 1931 * CFLAGS = $(.INCLUDES) 1932 * CFLAGS := -I.. $(CFLAGS) 1933 * 1934 * And not get an error. 1935 */ 1936 Boolean oldOldVars = oldVars; 1937 1938 oldVars = FALSE; 1939 1940 /* 1941 * make sure that we set the variable the first time to nothing 1942 * so that it gets substituted! 1943 */ 1944 if (!Var_Exists(line, ctxt)) 1945 Var_Set(line, "", ctxt, 0); 1946 1947 cp = Var_Subst(NULL, cp, ctxt, FALSE, TRUE); 1948 oldVars = oldOldVars; 1949 freeCp = TRUE; 1950 1951 Var_Set(line, cp, ctxt, 0); 1952 } else if (type == VAR_SHELL) { 1953 char *res; 1954 const char *error; 1955 1956 if (strchr(cp, '$') != NULL) { 1957 /* 1958 * There's a dollar sign in the command, so perform variable 1959 * expansion on the whole thing. The resulting string will need 1960 * freeing when we're done, so set freeCmd to TRUE. 1961 */ 1962 cp = Var_Subst(NULL, cp, VAR_CMD, TRUE, TRUE); 1963 freeCp = TRUE; 1964 } 1965 1966 res = Cmd_Exec(cp, &error); 1967 Var_Set(line, res, ctxt, 0); 1968 free(res); 1969 1970 if (error) 1971 Parse_Error(PARSE_WARNING, error, cp); 1972 } else { 1973 /* 1974 * Normal assignment -- just do it. 1975 */ 1976 Var_Set(line, cp, ctxt, 0); 1977 } 1978 if (strcmp(line, MAKEOVERRIDES) == 0) 1979 Main_ExportMAKEFLAGS(FALSE); /* re-export MAKEFLAGS */ 1980 else if (strcmp(line, ".CURDIR") == 0) { 1981 /* 1982 * Somone is being (too?) clever... 1983 * Let's pretend they know what they are doing and 1984 * re-initialize the 'cur' Path. 1985 */ 1986 Dir_InitCur(cp); 1987 Dir_SetPATH(); 1988 } else if (strcmp(line, MAKE_JOB_PREFIX) == 0) { 1989 Job_SetPrefix(); 1990 } else if (strcmp(line, MAKE_EXPORTED) == 0) { 1991 Var_Export(cp, 0); 1992 } 1993 if (freeCp) 1994 free(cp); 1995 } 1996 1997 1998 /* 1999 * ParseMaybeSubMake -- 2000 * Scan the command string to see if it a possible submake node 2001 * Input: 2002 * cmd the command to scan 2003 * Results: 2004 * TRUE if the command is possibly a submake, FALSE if not. 2005 */ 2006 static Boolean 2007 ParseMaybeSubMake(const char *cmd) 2008 { 2009 size_t i; 2010 static struct { 2011 const char *name; 2012 size_t len; 2013 } vals[] = { 2014 #define MKV(A) { A, sizeof(A) - 1 } 2015 MKV("${MAKE}"), 2016 MKV("${.MAKE}"), 2017 MKV("$(MAKE)"), 2018 MKV("$(.MAKE)"), 2019 MKV("make"), 2020 }; 2021 for (i = 0; i < sizeof(vals)/sizeof(vals[0]); i++) { 2022 char *ptr; 2023 if ((ptr = strstr(cmd, vals[i].name)) == NULL) 2024 continue; 2025 if ((ptr == cmd || !isalnum((unsigned char)ptr[-1])) 2026 && !isalnum((unsigned char)ptr[vals[i].len])) 2027 return TRUE; 2028 } 2029 return FALSE; 2030 } 2031 2032 /*- 2033 * ParseAddCmd -- 2034 * Lst_ForEach function to add a command line to all targets 2035 * 2036 * Input: 2037 * gnp the node to which the command is to be added 2038 * cmd the command to add 2039 * 2040 * Results: 2041 * Always 0 2042 * 2043 * Side Effects: 2044 * A new element is added to the commands list of the node, 2045 * and the node can be marked as a submake node if the command is 2046 * determined to be that. 2047 */ 2048 static int 2049 ParseAddCmd(void *gnp, void *cmd) 2050 { 2051 GNode *gn = (GNode *)gnp; 2052 2053 /* Add to last (ie current) cohort for :: targets */ 2054 if ((gn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (gn->cohorts)) 2055 gn = (GNode *)Lst_Datum(Lst_Last(gn->cohorts)); 2056 2057 /* if target already supplied, ignore commands */ 2058 if (!(gn->type & OP_HAS_COMMANDS)) { 2059 (void)Lst_AtEnd(gn->commands, cmd); 2060 if (ParseMaybeSubMake(cmd)) 2061 gn->type |= OP_SUBMAKE; 2062 ParseMark(gn); 2063 } else { 2064 #ifdef notyet 2065 /* XXX: We cannot do this until we fix the tree */ 2066 (void)Lst_AtEnd(gn->commands, cmd); 2067 Parse_Error(PARSE_WARNING, 2068 "overriding commands for target \"%s\"; " 2069 "previous commands defined at %s: %d ignored", 2070 gn->name, gn->fname, gn->lineno); 2071 #else 2072 Parse_Error(PARSE_WARNING, 2073 "duplicate script for target \"%s\" ignored", 2074 gn->name); 2075 ParseErrorInternal(gn->fname, gn->lineno, PARSE_WARNING, 2076 "using previous script for \"%s\" defined here", 2077 gn->name); 2078 #endif 2079 } 2080 return(0); 2081 } 2082 2083 /*- 2084 *----------------------------------------------------------------------- 2085 * ParseHasCommands -- 2086 * Callback procedure for Parse_File when destroying the list of 2087 * targets on the last dependency line. Marks a target as already 2088 * having commands if it does, to keep from having shell commands 2089 * on multiple dependency lines. 2090 * 2091 * Input: 2092 * gnp Node to examine 2093 * 2094 * Results: 2095 * None 2096 * 2097 * Side Effects: 2098 * OP_HAS_COMMANDS may be set for the target. 2099 * 2100 *----------------------------------------------------------------------- 2101 */ 2102 static void 2103 ParseHasCommands(void *gnp) 2104 { 2105 GNode *gn = (GNode *)gnp; 2106 if (!Lst_IsEmpty(gn->commands)) { 2107 gn->type |= OP_HAS_COMMANDS; 2108 } 2109 } 2110 2111 /*- 2112 *----------------------------------------------------------------------- 2113 * Parse_AddIncludeDir -- 2114 * Add a directory to the path searched for included makefiles 2115 * bracketed by double-quotes. Used by functions in main.c 2116 * 2117 * Input: 2118 * dir The name of the directory to add 2119 * 2120 * Results: 2121 * None. 2122 * 2123 * Side Effects: 2124 * The directory is appended to the list. 2125 * 2126 *----------------------------------------------------------------------- 2127 */ 2128 void 2129 Parse_AddIncludeDir(char *dir) 2130 { 2131 (void)Dir_AddDir(parseIncPath, dir); 2132 } 2133 2134 /*- 2135 *--------------------------------------------------------------------- 2136 * ParseDoInclude -- 2137 * Push to another file. 2138 * 2139 * The input is the line minus the `.'. A file spec is a string 2140 * enclosed in <> or "". The former is looked for only in sysIncPath. 2141 * The latter in . and the directories specified by -I command line 2142 * options 2143 * 2144 * Results: 2145 * None 2146 * 2147 * Side Effects: 2148 * A structure is added to the includes Lst and readProc, lineno, 2149 * fname and curFILE are altered for the new file 2150 *--------------------------------------------------------------------- 2151 */ 2152 2153 static void 2154 Parse_include_file(char *file, Boolean isSystem, int silent) 2155 { 2156 struct loadedfile *lf; 2157 char *fullname; /* full pathname of file */ 2158 char *newName; 2159 char *prefEnd, *incdir; 2160 int fd; 2161 int i; 2162 2163 /* 2164 * Now we know the file's name and its search path, we attempt to 2165 * find the durn thing. A return of NULL indicates the file don't 2166 * exist. 2167 */ 2168 fullname = file[0] == '/' ? bmake_strdup(file) : NULL; 2169 2170 if (fullname == NULL && !isSystem) { 2171 /* 2172 * Include files contained in double-quotes are first searched for 2173 * relative to the including file's location. We don't want to 2174 * cd there, of course, so we just tack on the old file's 2175 * leading path components and call Dir_FindFile to see if 2176 * we can locate the beast. 2177 */ 2178 2179 incdir = bmake_strdup(curFile->fname); 2180 prefEnd = strrchr(incdir, '/'); 2181 if (prefEnd != NULL) { 2182 *prefEnd = '\0'; 2183 /* Now do lexical processing of leading "../" on the filename */ 2184 for (i = 0; strncmp(file + i, "../", 3) == 0; i += 3) { 2185 prefEnd = strrchr(incdir + 1, '/'); 2186 if (prefEnd == NULL || strcmp(prefEnd, "/..") == 0) 2187 break; 2188 *prefEnd = '\0'; 2189 } 2190 newName = str_concat(incdir, file + i, STR_ADDSLASH); 2191 fullname = Dir_FindFile(newName, parseIncPath); 2192 if (fullname == NULL) 2193 fullname = Dir_FindFile(newName, dirSearchPath); 2194 free(newName); 2195 } 2196 free(incdir); 2197 2198 if (fullname == NULL) { 2199 /* 2200 * Makefile wasn't found in same directory as included makefile. 2201 * Search for it first on the -I search path, 2202 * then on the .PATH search path, if not found in a -I directory. 2203 * If we have a suffix specific path we should use that. 2204 */ 2205 char *suff; 2206 Lst suffPath = NULL; 2207 2208 if ((suff = strrchr(file, '.'))) { 2209 suffPath = Suff_GetPath(suff); 2210 if (suffPath != NULL) { 2211 fullname = Dir_FindFile(file, suffPath); 2212 } 2213 } 2214 if (fullname == NULL) { 2215 fullname = Dir_FindFile(file, parseIncPath); 2216 if (fullname == NULL) { 2217 fullname = Dir_FindFile(file, dirSearchPath); 2218 } 2219 } 2220 } 2221 } 2222 2223 /* Looking for a system file or file still not found */ 2224 if (fullname == NULL) { 2225 /* 2226 * Look for it on the system path 2227 */ 2228 fullname = Dir_FindFile(file, 2229 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath); 2230 } 2231 2232 if (fullname == NULL) { 2233 if (!silent) 2234 Parse_Error(PARSE_FATAL, "Could not find %s", file); 2235 return; 2236 } 2237 2238 /* Actually open the file... */ 2239 fd = open(fullname, O_RDONLY); 2240 if (fd == -1) { 2241 if (!silent) 2242 Parse_Error(PARSE_FATAL, "Cannot open %s", fullname); 2243 free(fullname); 2244 return; 2245 } 2246 2247 /* load it */ 2248 lf = loadfile(fullname, fd); 2249 2250 ParseSetIncludedFile(); 2251 /* Start reading from this file next */ 2252 Parse_SetInput(fullname, 0, -1, loadedfile_nextbuf, lf); 2253 curFile->lf = lf; 2254 } 2255 2256 static void 2257 ParseDoInclude(char *line) 2258 { 2259 char endc; /* the character which ends the file spec */ 2260 char *cp; /* current position in file spec */ 2261 int silent = (*line != 'i') ? 1 : 0; 2262 char *file = &line[7 + silent]; 2263 2264 /* Skip to delimiter character so we know where to look */ 2265 while (*file == ' ' || *file == '\t') 2266 file++; 2267 2268 if (*file != '"' && *file != '<') { 2269 Parse_Error(PARSE_FATAL, 2270 ".include filename must be delimited by '\"' or '<'"); 2271 return; 2272 } 2273 2274 /* 2275 * Set the search path on which to find the include file based on the 2276 * characters which bracket its name. Angle-brackets imply it's 2277 * a system Makefile while double-quotes imply it's a user makefile 2278 */ 2279 if (*file == '<') { 2280 endc = '>'; 2281 } else { 2282 endc = '"'; 2283 } 2284 2285 /* Skip to matching delimiter */ 2286 for (cp = ++file; *cp && *cp != endc; cp++) 2287 continue; 2288 2289 if (*cp != endc) { 2290 Parse_Error(PARSE_FATAL, 2291 "Unclosed %cinclude filename. '%c' expected", 2292 '.', endc); 2293 return; 2294 } 2295 *cp = '\0'; 2296 2297 /* 2298 * Substitute for any variables in the file name before trying to 2299 * find the thing. 2300 */ 2301 file = Var_Subst(NULL, file, VAR_CMD, FALSE, TRUE); 2302 2303 Parse_include_file(file, endc == '>', silent); 2304 free(file); 2305 } 2306 2307 2308 /*- 2309 *--------------------------------------------------------------------- 2310 * ParseSetIncludedFile -- 2311 * Set the .INCLUDEDFROMFILE variable to the contents of .PARSEFILE 2312 * and the .INCLUDEDFROMDIR variable to the contents of .PARSEDIR 2313 * 2314 * Results: 2315 * None 2316 * 2317 * Side Effects: 2318 * The .INCLUDEDFROMFILE variable is overwritten by the contents 2319 * of .PARSEFILE and the .INCLUDEDFROMDIR variable is overwriten 2320 * by the contents of .PARSEDIR 2321 *--------------------------------------------------------------------- 2322 */ 2323 static void 2324 ParseSetIncludedFile(void) 2325 { 2326 char *pf, *fp = NULL; 2327 char *pd, *dp = NULL; 2328 2329 pf = Var_Value(".PARSEFILE", VAR_GLOBAL, &fp); 2330 Var_Set(".INCLUDEDFROMFILE", pf, VAR_GLOBAL, 0); 2331 pd = Var_Value(".PARSEDIR", VAR_GLOBAL, &dp); 2332 Var_Set(".INCLUDEDFROMDIR", pd, VAR_GLOBAL, 0); 2333 2334 if (DEBUG(PARSE)) 2335 fprintf(debug_file, "%s: ${.INCLUDEDFROMDIR} = `%s' " 2336 "${.INCLUDEDFROMFILE} = `%s'\n", __func__, pd, pf); 2337 2338 if (fp) 2339 free(fp); 2340 if (dp) 2341 free(dp); 2342 } 2343 /*- 2344 *--------------------------------------------------------------------- 2345 * ParseSetParseFile -- 2346 * Set the .PARSEDIR and .PARSEFILE variables to the dirname and 2347 * basename of the given filename 2348 * 2349 * Results: 2350 * None 2351 * 2352 * Side Effects: 2353 * The .PARSEDIR and .PARSEFILE variables are overwritten by the 2354 * dirname and basename of the given filename. 2355 *--------------------------------------------------------------------- 2356 */ 2357 static void 2358 ParseSetParseFile(const char *filename) 2359 { 2360 char *slash, *dirname; 2361 const char *pd, *pf; 2362 int len; 2363 2364 slash = strrchr(filename, '/'); 2365 if (slash == NULL) { 2366 Var_Set(".PARSEDIR", pd = curdir, VAR_GLOBAL, 0); 2367 Var_Set(".PARSEFILE", pf = filename, VAR_GLOBAL, 0); 2368 dirname= NULL; 2369 } else { 2370 len = slash - filename; 2371 dirname = bmake_malloc(len + 1); 2372 memcpy(dirname, filename, len); 2373 dirname[len] = '\0'; 2374 Var_Set(".PARSEDIR", pd = dirname, VAR_GLOBAL, 0); 2375 Var_Set(".PARSEFILE", pf = slash + 1, VAR_GLOBAL, 0); 2376 } 2377 if (DEBUG(PARSE)) 2378 fprintf(debug_file, "%s: ${.PARSEDIR} = `%s' ${.PARSEFILE} = `%s'\n", 2379 __func__, pd, pf); 2380 free(dirname); 2381 } 2382 2383 /* 2384 * Track the makefiles we read - so makefiles can 2385 * set dependencies on them. 2386 * Avoid adding anything more than once. 2387 */ 2388 2389 static void 2390 ParseTrackInput(const char *name) 2391 { 2392 char *old; 2393 char *fp = NULL; 2394 size_t name_len = strlen(name); 2395 2396 old = Var_Value(MAKE_MAKEFILES, VAR_GLOBAL, &fp); 2397 if (old) { 2398 /* does it contain name? */ 2399 for (; old != NULL; old = strchr(old, ' ')) { 2400 if (*old == ' ') 2401 old++; 2402 if (memcmp(old, name, name_len) == 0 2403 && (old[name_len] == 0 || old[name_len] == ' ')) 2404 goto cleanup; 2405 } 2406 } 2407 Var_Append (MAKE_MAKEFILES, name, VAR_GLOBAL); 2408 cleanup: 2409 if (fp) { 2410 free(fp); 2411 } 2412 } 2413 2414 2415 /*- 2416 *--------------------------------------------------------------------- 2417 * Parse_setInput -- 2418 * Start Parsing from the given source 2419 * 2420 * Results: 2421 * None 2422 * 2423 * Side Effects: 2424 * A structure is added to the includes Lst and readProc, lineno, 2425 * fname and curFile are altered for the new file 2426 *--------------------------------------------------------------------- 2427 */ 2428 void 2429 Parse_SetInput(const char *name, int line, int fd, 2430 char *(*nextbuf)(void *, size_t *), void *arg) 2431 { 2432 char *buf; 2433 size_t len; 2434 2435 if (name == NULL) 2436 name = curFile->fname; 2437 else 2438 ParseTrackInput(name); 2439 2440 if (DEBUG(PARSE)) 2441 fprintf(debug_file, "%s: file %s, line %d, fd %d, nextbuf %p, arg %p\n", 2442 __func__, name, line, fd, nextbuf, arg); 2443 2444 if (fd == -1 && nextbuf == NULL) 2445 /* sanity */ 2446 return; 2447 2448 if (curFile != NULL) 2449 /* Save exiting file info */ 2450 Lst_AtFront(includes, curFile); 2451 2452 /* Allocate and fill in new structure */ 2453 curFile = bmake_malloc(sizeof *curFile); 2454 2455 /* 2456 * Once the previous state has been saved, we can get down to reading 2457 * the new file. We set up the name of the file to be the absolute 2458 * name of the include file so error messages refer to the right 2459 * place. 2460 */ 2461 curFile->fname = bmake_strdup(name); 2462 curFile->lineno = line; 2463 curFile->first_lineno = line; 2464 curFile->nextbuf = nextbuf; 2465 curFile->nextbuf_arg = arg; 2466 curFile->lf = NULL; 2467 2468 assert(nextbuf != NULL); 2469 2470 /* Get first block of input data */ 2471 buf = curFile->nextbuf(curFile->nextbuf_arg, &len); 2472 if (buf == NULL) { 2473 /* Was all a waste of time ... */ 2474 if (curFile->fname) 2475 free(curFile->fname); 2476 free(curFile); 2477 return; 2478 } 2479 curFile->P_str = buf; 2480 curFile->P_ptr = buf; 2481 curFile->P_end = buf+len; 2482 2483 curFile->cond_depth = Cond_save_depth(); 2484 ParseSetParseFile(name); 2485 } 2486 2487 #ifdef SYSVINCLUDE 2488 /*- 2489 *--------------------------------------------------------------------- 2490 * ParseTraditionalInclude -- 2491 * Push to another file. 2492 * 2493 * The input is the current line. The file name(s) are 2494 * following the "include". 2495 * 2496 * Results: 2497 * None 2498 * 2499 * Side Effects: 2500 * A structure is added to the includes Lst and readProc, lineno, 2501 * fname and curFILE are altered for the new file 2502 *--------------------------------------------------------------------- 2503 */ 2504 static void 2505 ParseTraditionalInclude(char *line) 2506 { 2507 char *cp; /* current position in file spec */ 2508 int done = 0; 2509 int silent = (line[0] != 'i') ? 1 : 0; 2510 char *file = &line[silent + 7]; 2511 char *all_files; 2512 2513 if (DEBUG(PARSE)) { 2514 fprintf(debug_file, "%s: %s\n", __func__, file); 2515 } 2516 2517 /* 2518 * Skip over whitespace 2519 */ 2520 while (isspace((unsigned char)*file)) 2521 file++; 2522 2523 /* 2524 * Substitute for any variables in the file name before trying to 2525 * find the thing. 2526 */ 2527 all_files = Var_Subst(NULL, file, VAR_CMD, FALSE, TRUE); 2528 2529 if (*file == '\0') { 2530 Parse_Error(PARSE_FATAL, 2531 "Filename missing from \"include\""); 2532 return; 2533 } 2534 2535 for (file = all_files; !done; file = cp + 1) { 2536 /* Skip to end of line or next whitespace */ 2537 for (cp = file; *cp && !isspace((unsigned char) *cp); cp++) 2538 continue; 2539 2540 if (*cp) 2541 *cp = '\0'; 2542 else 2543 done = 1; 2544 2545 Parse_include_file(file, FALSE, silent); 2546 } 2547 free(all_files); 2548 } 2549 #endif 2550 2551 #ifdef GMAKEEXPORT 2552 /*- 2553 *--------------------------------------------------------------------- 2554 * ParseGmakeExport -- 2555 * Parse export <variable>=<value> 2556 * 2557 * And set the environment with it. 2558 * 2559 * Results: 2560 * None 2561 * 2562 * Side Effects: 2563 * None 2564 *--------------------------------------------------------------------- 2565 */ 2566 static void 2567 ParseGmakeExport(char *line) 2568 { 2569 char *variable = &line[6]; 2570 char *value; 2571 2572 if (DEBUG(PARSE)) { 2573 fprintf(debug_file, "%s: %s\n", __func__, variable); 2574 } 2575 2576 /* 2577 * Skip over whitespace 2578 */ 2579 while (isspace((unsigned char)*variable)) 2580 variable++; 2581 2582 for (value = variable; *value && *value != '='; value++) 2583 continue; 2584 2585 if (*value != '=') { 2586 Parse_Error(PARSE_FATAL, 2587 "Variable/Value missing from \"export\""); 2588 return; 2589 } 2590 *value++ = '\0'; /* terminate variable */ 2591 2592 /* 2593 * Expand the value before putting it in the environment. 2594 */ 2595 value = Var_Subst(NULL, value, VAR_CMD, FALSE, TRUE); 2596 setenv(variable, value, 1); 2597 } 2598 #endif 2599 2600 /*- 2601 *--------------------------------------------------------------------- 2602 * ParseEOF -- 2603 * Called when EOF is reached in the current file. If we were reading 2604 * an include file, the includes stack is popped and things set up 2605 * to go back to reading the previous file at the previous location. 2606 * 2607 * Results: 2608 * CONTINUE if there's more to do. DONE if not. 2609 * 2610 * Side Effects: 2611 * The old curFILE, is closed. The includes list is shortened. 2612 * lineno, curFILE, and fname are changed if CONTINUE is returned. 2613 *--------------------------------------------------------------------- 2614 */ 2615 static int 2616 ParseEOF(void) 2617 { 2618 char *ptr; 2619 size_t len; 2620 2621 assert(curFile->nextbuf != NULL); 2622 2623 /* get next input buffer, if any */ 2624 ptr = curFile->nextbuf(curFile->nextbuf_arg, &len); 2625 curFile->P_ptr = ptr; 2626 curFile->P_str = ptr; 2627 curFile->P_end = ptr + len; 2628 curFile->lineno = curFile->first_lineno; 2629 if (ptr != NULL) { 2630 /* Iterate again */ 2631 return CONTINUE; 2632 } 2633 2634 /* Ensure the makefile (or loop) didn't have mismatched conditionals */ 2635 Cond_restore_depth(curFile->cond_depth); 2636 2637 if (curFile->lf != NULL) { 2638 loadedfile_destroy(curFile->lf); 2639 curFile->lf = NULL; 2640 } 2641 2642 /* Dispose of curFile info */ 2643 /* Leak curFile->fname because all the gnodes have pointers to it */ 2644 free(curFile->P_str); 2645 free(curFile); 2646 2647 curFile = Lst_DeQueue(includes); 2648 2649 if (curFile == NULL) { 2650 /* We've run out of input */ 2651 Var_Delete(".PARSEDIR", VAR_GLOBAL); 2652 Var_Delete(".PARSEFILE", VAR_GLOBAL); 2653 Var_Delete(".INCLUDEDFROMDIR", VAR_GLOBAL); 2654 Var_Delete(".INCLUDEDFROMFILE", VAR_GLOBAL); 2655 return DONE; 2656 } 2657 2658 if (DEBUG(PARSE)) 2659 fprintf(debug_file, "ParseEOF: returning to file %s, line %d\n", 2660 curFile->fname, curFile->lineno); 2661 2662 /* Restore the PARSEDIR/PARSEFILE variables */ 2663 ParseSetParseFile(curFile->fname); 2664 return (CONTINUE); 2665 } 2666 2667 #define PARSE_RAW 1 2668 #define PARSE_SKIP 2 2669 2670 static char * 2671 ParseGetLine(int flags, int *length) 2672 { 2673 IFile *cf = curFile; 2674 char *ptr; 2675 char ch; 2676 char *line; 2677 char *line_end; 2678 char *escaped; 2679 char *comment; 2680 char *tp; 2681 2682 /* Loop through blank lines and comment lines */ 2683 for (;;) { 2684 cf->lineno++; 2685 line = cf->P_ptr; 2686 ptr = line; 2687 line_end = line; 2688 escaped = NULL; 2689 comment = NULL; 2690 for (;;) { 2691 if (cf->P_end != NULL && ptr == cf->P_end) { 2692 /* end of buffer */ 2693 ch = 0; 2694 break; 2695 } 2696 ch = *ptr; 2697 if (ch == 0 || (ch == '\\' && ptr[1] == 0)) { 2698 if (cf->P_end == NULL) 2699 /* End of string (aka for loop) data */ 2700 break; 2701 /* see if there is more we can parse */ 2702 while (ptr++ < cf->P_end) { 2703 if ((ch = *ptr) == '\n') { 2704 if (ptr > line && ptr[-1] == '\\') 2705 continue; 2706 Parse_Error(PARSE_WARNING, 2707 "Zero byte read from file, skipping rest of line."); 2708 break; 2709 } 2710 } 2711 if (cf->nextbuf != NULL) { 2712 /* 2713 * End of this buffer; return EOF and outer logic 2714 * will get the next one. (eww) 2715 */ 2716 break; 2717 } 2718 Parse_Error(PARSE_FATAL, "Zero byte read from file"); 2719 return NULL; 2720 } 2721 2722 if (ch == '\\') { 2723 /* Don't treat next character as special, remember first one */ 2724 if (escaped == NULL) 2725 escaped = ptr; 2726 if (ptr[1] == '\n') 2727 cf->lineno++; 2728 ptr += 2; 2729 line_end = ptr; 2730 continue; 2731 } 2732 if (ch == '#' && comment == NULL) { 2733 /* Remember first '#' for comment stripping */ 2734 /* Unless previous char was '[', as in modifier :[#] */ 2735 if (!(ptr > line && ptr[-1] == '[')) 2736 comment = line_end; 2737 } 2738 ptr++; 2739 if (ch == '\n') 2740 break; 2741 if (!isspace((unsigned char)ch)) 2742 /* We are not interested in trailing whitespace */ 2743 line_end = ptr; 2744 } 2745 2746 /* Save next 'to be processed' location */ 2747 cf->P_ptr = ptr; 2748 2749 /* Check we have a non-comment, non-blank line */ 2750 if (line_end == line || comment == line) { 2751 if (ch == 0) 2752 /* At end of file */ 2753 return NULL; 2754 /* Parse another line */ 2755 continue; 2756 } 2757 2758 /* We now have a line of data */ 2759 *line_end = 0; 2760 2761 if (flags & PARSE_RAW) { 2762 /* Leave '\' (etc) in line buffer (eg 'for' lines) */ 2763 *length = line_end - line; 2764 return line; 2765 } 2766 2767 if (flags & PARSE_SKIP) { 2768 /* Completely ignore non-directives */ 2769 if (line[0] != '.') 2770 continue; 2771 /* We could do more of the .else/.elif/.endif checks here */ 2772 } 2773 break; 2774 } 2775 2776 /* Brutally ignore anything after a non-escaped '#' in non-commands */ 2777 if (comment != NULL && line[0] != '\t') { 2778 line_end = comment; 2779 *line_end = 0; 2780 } 2781 2782 /* If we didn't see a '\\' then the in-situ data is fine */ 2783 if (escaped == NULL) { 2784 *length = line_end - line; 2785 return line; 2786 } 2787 2788 /* Remove escapes from '\n' and '#' */ 2789 tp = ptr = escaped; 2790 escaped = line; 2791 for (; ; *tp++ = ch) { 2792 ch = *ptr++; 2793 if (ch != '\\') { 2794 if (ch == 0) 2795 break; 2796 continue; 2797 } 2798 2799 ch = *ptr++; 2800 if (ch == 0) { 2801 /* Delete '\\' at end of buffer */ 2802 tp--; 2803 break; 2804 } 2805 2806 if (ch == '#' && line[0] != '\t') 2807 /* Delete '\\' from before '#' on non-command lines */ 2808 continue; 2809 2810 if (ch != '\n') { 2811 /* Leave '\\' in buffer for later */ 2812 *tp++ = '\\'; 2813 /* Make sure we don't delete an escaped ' ' from the line end */ 2814 escaped = tp + 1; 2815 continue; 2816 } 2817 2818 /* Escaped '\n' replace following whitespace with a single ' ' */ 2819 while (ptr[0] == ' ' || ptr[0] == '\t') 2820 ptr++; 2821 ch = ' '; 2822 } 2823 2824 /* Delete any trailing spaces - eg from empty continuations */ 2825 while (tp > escaped && isspace((unsigned char)tp[-1])) 2826 tp--; 2827 2828 *tp = 0; 2829 *length = tp - line; 2830 return line; 2831 } 2832 2833 /*- 2834 *--------------------------------------------------------------------- 2835 * ParseReadLine -- 2836 * Read an entire line from the input file. Called only by Parse_File. 2837 * 2838 * Results: 2839 * A line w/o its newline 2840 * 2841 * Side Effects: 2842 * Only those associated with reading a character 2843 *--------------------------------------------------------------------- 2844 */ 2845 static char * 2846 ParseReadLine(void) 2847 { 2848 char *line; /* Result */ 2849 int lineLength; /* Length of result */ 2850 int lineno; /* Saved line # */ 2851 int rval; 2852 2853 for (;;) { 2854 line = ParseGetLine(0, &lineLength); 2855 if (line == NULL) 2856 return NULL; 2857 2858 if (line[0] != '.') 2859 return line; 2860 2861 /* 2862 * The line might be a conditional. Ask the conditional module 2863 * about it and act accordingly 2864 */ 2865 switch (Cond_Eval(line)) { 2866 case COND_SKIP: 2867 /* Skip to next conditional that evaluates to COND_PARSE. */ 2868 do { 2869 line = ParseGetLine(PARSE_SKIP, &lineLength); 2870 } while (line && Cond_Eval(line) != COND_PARSE); 2871 if (line == NULL) 2872 break; 2873 continue; 2874 case COND_PARSE: 2875 continue; 2876 case COND_INVALID: /* Not a conditional line */ 2877 /* Check for .for loops */ 2878 rval = For_Eval(line); 2879 if (rval == 0) 2880 /* Not a .for line */ 2881 break; 2882 if (rval < 0) 2883 /* Syntax error - error printed, ignore line */ 2884 continue; 2885 /* Start of a .for loop */ 2886 lineno = curFile->lineno; 2887 /* Accumulate loop lines until matching .endfor */ 2888 do { 2889 line = ParseGetLine(PARSE_RAW, &lineLength); 2890 if (line == NULL) { 2891 Parse_Error(PARSE_FATAL, 2892 "Unexpected end of file in for loop."); 2893 break; 2894 } 2895 } while (For_Accum(line)); 2896 /* Stash each iteration as a new 'input file' */ 2897 For_Run(lineno); 2898 /* Read next line from for-loop buffer */ 2899 continue; 2900 } 2901 return (line); 2902 } 2903 } 2904 2905 /*- 2906 *----------------------------------------------------------------------- 2907 * ParseFinishLine -- 2908 * Handle the end of a dependency group. 2909 * 2910 * Results: 2911 * Nothing. 2912 * 2913 * Side Effects: 2914 * inLine set FALSE. 'targets' list destroyed. 2915 * 2916 *----------------------------------------------------------------------- 2917 */ 2918 static void 2919 ParseFinishLine(void) 2920 { 2921 if (inLine) { 2922 Lst_ForEach(targets, Suff_EndTransform, NULL); 2923 Lst_Destroy(targets, ParseHasCommands); 2924 targets = NULL; 2925 inLine = FALSE; 2926 } 2927 } 2928 2929 2930 /*- 2931 *--------------------------------------------------------------------- 2932 * Parse_File -- 2933 * Parse a file into its component parts, incorporating it into the 2934 * current dependency graph. This is the main function and controls 2935 * almost every other function in this module 2936 * 2937 * Input: 2938 * name the name of the file being read 2939 * fd Open file to makefile to parse 2940 * 2941 * Results: 2942 * None 2943 * 2944 * Side Effects: 2945 * closes fd. 2946 * Loads. Nodes are added to the list of all targets, nodes and links 2947 * are added to the dependency graph. etc. etc. etc. 2948 *--------------------------------------------------------------------- 2949 */ 2950 void 2951 Parse_File(const char *name, int fd) 2952 { 2953 char *cp; /* pointer into the line */ 2954 char *line; /* the line we're working on */ 2955 struct loadedfile *lf; 2956 2957 lf = loadfile(name, fd); 2958 2959 inLine = FALSE; 2960 fatals = 0; 2961 2962 if (name == NULL) { 2963 name = "(stdin)"; 2964 } 2965 2966 Parse_SetInput(name, 0, -1, loadedfile_nextbuf, lf); 2967 curFile->lf = lf; 2968 2969 do { 2970 for (; (line = ParseReadLine()) != NULL; ) { 2971 if (DEBUG(PARSE)) 2972 fprintf(debug_file, "ParseReadLine (%d): '%s'\n", 2973 curFile->lineno, line); 2974 if (*line == '.') { 2975 /* 2976 * Lines that begin with the special character may be 2977 * include or undef directives. 2978 * On the other hand they can be suffix rules (.c.o: ...) 2979 * or just dependencies for filenames that start '.'. 2980 */ 2981 for (cp = line + 1; isspace((unsigned char)*cp); cp++) { 2982 continue; 2983 } 2984 if (strncmp(cp, "include", 7) == 0 || 2985 ((cp[0] == 's' || cp[0] == '-') && 2986 strncmp(&cp[1], "include", 7) == 0)) { 2987 ParseDoInclude(cp); 2988 continue; 2989 } 2990 if (strncmp(cp, "undef", 5) == 0) { 2991 char *cp2; 2992 for (cp += 5; isspace((unsigned char) *cp); cp++) 2993 continue; 2994 for (cp2 = cp; !isspace((unsigned char) *cp2) && 2995 (*cp2 != '\0'); cp2++) 2996 continue; 2997 *cp2 = '\0'; 2998 Var_Delete(cp, VAR_GLOBAL); 2999 continue; 3000 } else if (strncmp(cp, "export", 6) == 0) { 3001 for (cp += 6; isspace((unsigned char) *cp); cp++) 3002 continue; 3003 Var_Export(cp, 1); 3004 continue; 3005 } else if (strncmp(cp, "unexport", 8) == 0) { 3006 Var_UnExport(cp); 3007 continue; 3008 } else if (strncmp(cp, "info", 4) == 0 || 3009 strncmp(cp, "error", 5) == 0 || 3010 strncmp(cp, "warning", 7) == 0) { 3011 if (ParseMessage(cp)) 3012 continue; 3013 } 3014 } 3015 3016 if (*line == '\t') { 3017 /* 3018 * If a line starts with a tab, it can only hope to be 3019 * a creation command. 3020 */ 3021 cp = line + 1; 3022 shellCommand: 3023 for (; isspace ((unsigned char)*cp); cp++) { 3024 continue; 3025 } 3026 if (*cp) { 3027 if (!inLine) 3028 Parse_Error(PARSE_FATAL, 3029 "Unassociated shell command \"%s\"", 3030 cp); 3031 /* 3032 * So long as it's not a blank line and we're actually 3033 * in a dependency spec, add the command to the list of 3034 * commands of all targets in the dependency spec 3035 */ 3036 if (targets) { 3037 cp = bmake_strdup(cp); 3038 Lst_ForEach(targets, ParseAddCmd, cp); 3039 #ifdef CLEANUP 3040 Lst_AtEnd(targCmds, cp); 3041 #endif 3042 } 3043 } 3044 continue; 3045 } 3046 3047 #ifdef SYSVINCLUDE 3048 if (((strncmp(line, "include", 7) == 0 && 3049 isspace((unsigned char) line[7])) || 3050 ((line[0] == 's' || line[0] == '-') && 3051 strncmp(&line[1], "include", 7) == 0 && 3052 isspace((unsigned char) line[8]))) && 3053 strchr(line, ':') == NULL) { 3054 /* 3055 * It's an S3/S5-style "include". 3056 */ 3057 ParseTraditionalInclude(line); 3058 continue; 3059 } 3060 #endif 3061 #ifdef GMAKEEXPORT 3062 if (strncmp(line, "export", 6) == 0 && 3063 isspace((unsigned char) line[6]) && 3064 strchr(line, ':') == NULL) { 3065 /* 3066 * It's a Gmake "export". 3067 */ 3068 ParseGmakeExport(line); 3069 continue; 3070 } 3071 #endif 3072 if (Parse_IsVar(line)) { 3073 ParseFinishLine(); 3074 Parse_DoVar(line, VAR_GLOBAL); 3075 continue; 3076 } 3077 3078 #ifndef POSIX 3079 /* 3080 * To make life easier on novices, if the line is indented we 3081 * first make sure the line has a dependency operator in it. 3082 * If it doesn't have an operator and we're in a dependency 3083 * line's script, we assume it's actually a shell command 3084 * and add it to the current list of targets. 3085 */ 3086 cp = line; 3087 if (isspace((unsigned char) line[0])) { 3088 while ((*cp != '\0') && isspace((unsigned char) *cp)) 3089 cp++; 3090 while (*cp && (ParseIsEscaped(line, cp) || 3091 (*cp != ':') && (*cp != '!'))) { 3092 cp++; 3093 } 3094 if (*cp == '\0') { 3095 if (inLine) { 3096 Parse_Error(PARSE_WARNING, 3097 "Shell command needs a leading tab"); 3098 goto shellCommand; 3099 } 3100 } 3101 } 3102 #endif 3103 ParseFinishLine(); 3104 3105 /* 3106 * For some reason - probably to make the parser impossible - 3107 * a ';' can be used to separate commands from dependencies. 3108 * Attempt to avoid ';' inside substitution patterns. 3109 */ 3110 { 3111 int level = 0; 3112 3113 for (cp = line; *cp != 0; cp++) { 3114 if (*cp == '\\' && cp[1] != 0) { 3115 cp++; 3116 continue; 3117 } 3118 if (*cp == '$' && 3119 (cp[1] == '(' || cp[1] == '{')) { 3120 level++; 3121 continue; 3122 } 3123 if (level > 0) { 3124 if (*cp == ')' || *cp == '}') { 3125 level--; 3126 continue; 3127 } 3128 } else if (*cp == ';') { 3129 break; 3130 } 3131 } 3132 } 3133 if (*cp != 0) 3134 /* Terminate the dependency list at the ';' */ 3135 *cp++ = 0; 3136 else 3137 cp = NULL; 3138 3139 /* 3140 * We now know it's a dependency line so it needs to have all 3141 * variables expanded before being parsed. Tell the variable 3142 * module to complain if some variable is undefined... 3143 */ 3144 line = Var_Subst(NULL, line, VAR_CMD, TRUE, TRUE); 3145 3146 /* 3147 * Need a non-circular list for the target nodes 3148 */ 3149 if (targets) 3150 Lst_Destroy(targets, NULL); 3151 3152 targets = Lst_Init(FALSE); 3153 inLine = TRUE; 3154 3155 ParseDoDependency(line); 3156 free(line); 3157 3158 /* If there were commands after a ';', add them now */ 3159 if (cp != NULL) { 3160 goto shellCommand; 3161 } 3162 } 3163 /* 3164 * Reached EOF, but it may be just EOF of an include file... 3165 */ 3166 } while (ParseEOF() == CONTINUE); 3167 3168 if (fatals) { 3169 (void)fflush(stdout); 3170 (void)fprintf(stderr, 3171 "%s: Fatal errors encountered -- cannot continue", 3172 progname); 3173 PrintOnError(NULL, NULL); 3174 exit(1); 3175 } 3176 } 3177 3178 /*- 3179 *--------------------------------------------------------------------- 3180 * Parse_Init -- 3181 * initialize the parsing module 3182 * 3183 * Results: 3184 * none 3185 * 3186 * Side Effects: 3187 * the parseIncPath list is initialized... 3188 *--------------------------------------------------------------------- 3189 */ 3190 void 3191 Parse_Init(void) 3192 { 3193 mainNode = NULL; 3194 parseIncPath = Lst_Init(FALSE); 3195 sysIncPath = Lst_Init(FALSE); 3196 defIncPath = Lst_Init(FALSE); 3197 includes = Lst_Init(FALSE); 3198 #ifdef CLEANUP 3199 targCmds = Lst_Init(FALSE); 3200 #endif 3201 } 3202 3203 void 3204 Parse_End(void) 3205 { 3206 #ifdef CLEANUP 3207 Lst_Destroy(targCmds, (FreeProc *)free); 3208 if (targets) 3209 Lst_Destroy(targets, NULL); 3210 Lst_Destroy(defIncPath, Dir_Destroy); 3211 Lst_Destroy(sysIncPath, Dir_Destroy); 3212 Lst_Destroy(parseIncPath, Dir_Destroy); 3213 Lst_Destroy(includes, NULL); /* Should be empty now */ 3214 #endif 3215 } 3216 3217 3218 /*- 3219 *----------------------------------------------------------------------- 3220 * Parse_MainName -- 3221 * Return a Lst of the main target to create for main()'s sake. If 3222 * no such target exists, we Punt with an obnoxious error message. 3223 * 3224 * Results: 3225 * A Lst of the single node to create. 3226 * 3227 * Side Effects: 3228 * None. 3229 * 3230 *----------------------------------------------------------------------- 3231 */ 3232 Lst 3233 Parse_MainName(void) 3234 { 3235 Lst mainList; /* result list */ 3236 3237 mainList = Lst_Init(FALSE); 3238 3239 if (mainNode == NULL) { 3240 Punt("no target to make."); 3241 /*NOTREACHED*/ 3242 } else if (mainNode->type & OP_DOUBLEDEP) { 3243 (void)Lst_AtEnd(mainList, mainNode); 3244 Lst_Concat(mainList, mainNode->cohorts, LST_CONCNEW); 3245 } 3246 else 3247 (void)Lst_AtEnd(mainList, mainNode); 3248 Var_Append(".TARGETS", mainNode->name, VAR_GLOBAL); 3249 return (mainList); 3250 } 3251 3252 /*- 3253 *----------------------------------------------------------------------- 3254 * ParseMark -- 3255 * Add the filename and lineno to the GNode so that we remember 3256 * where it was first defined. 3257 * 3258 * Side Effects: 3259 * None. 3260 * 3261 *----------------------------------------------------------------------- 3262 */ 3263 static void 3264 ParseMark(GNode *gn) 3265 { 3266 gn->fname = curFile->fname; 3267 gn->lineno = curFile->lineno; 3268 } 3269