parse.c revision 1.276
1 /* $NetBSD: parse.c,v 1.276 2020/09/04 17:59:36 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 1.276 2020/09/04 17:59:36 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 1.276 2020/09/04 17:59:36 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/mman.h> 128 #include <sys/stat.h> 129 #include <errno.h> 130 #include <stdarg.h> 131 #include <stdio.h> 132 #include <stdint.h> 133 134 #ifndef MAP_FILE 135 #define MAP_FILE 0 136 #endif 137 #ifndef MAP_COPY 138 #define MAP_COPY MAP_PRIVATE 139 #endif 140 141 #include "make.h" 142 #include "dir.h" 143 #include "job.h" 144 #include "pathnames.h" 145 146 /* types and constants */ 147 148 /* 149 * Structure for a file being read ("included file") 150 */ 151 typedef struct IFile { 152 char *fname; /* name of file */ 153 int lineno; /* current line number in file */ 154 int first_lineno; /* line number of start of text */ 155 int cond_depth; /* 'if' nesting when file opened */ 156 Boolean depending; /* state of doing_depend on EOF */ 157 char *P_str; /* point to base of string buffer */ 158 char *P_ptr; /* point to next char of string buffer */ 159 char *P_end; /* point to the end of string buffer */ 160 char *(*nextbuf)(void *, size_t *); /* Function to get more data */ 161 void *nextbuf_arg; /* Opaque arg for nextbuf() */ 162 struct loadedfile *lf; /* loadedfile object, if any */ 163 } IFile; 164 165 166 /* 167 * These values are returned by ParseEOF to tell Parse_File whether to 168 * CONTINUE parsing, i.e. it had only reached the end of an include file, 169 * or if it's DONE. 170 */ 171 #define CONTINUE 1 172 #define DONE 0 173 174 /* 175 * Tokens for target attributes 176 */ 177 typedef enum { 178 Begin, /* .BEGIN */ 179 Default, /* .DEFAULT */ 180 DeleteOnError, /* .DELETE_ON_ERROR */ 181 End, /* .END */ 182 dotError, /* .ERROR */ 183 Ignore, /* .IGNORE */ 184 Includes, /* .INCLUDES */ 185 Interrupt, /* .INTERRUPT */ 186 Libs, /* .LIBS */ 187 Meta, /* .META */ 188 MFlags, /* .MFLAGS or .MAKEFLAGS */ 189 Main, /* .MAIN and we don't have anything user-specified to 190 * make */ 191 NoExport, /* .NOEXPORT */ 192 NoMeta, /* .NOMETA */ 193 NoMetaCmp, /* .NOMETA_CMP */ 194 NoPath, /* .NOPATH */ 195 Not, /* Not special */ 196 NotParallel, /* .NOTPARALLEL */ 197 Null, /* .NULL */ 198 ExObjdir, /* .OBJDIR */ 199 Order, /* .ORDER */ 200 Parallel, /* .PARALLEL */ 201 ExPath, /* .PATH */ 202 Phony, /* .PHONY */ 203 #ifdef POSIX 204 Posix, /* .POSIX */ 205 #endif 206 Precious, /* .PRECIOUS */ 207 ExShell, /* .SHELL */ 208 Silent, /* .SILENT */ 209 SingleShell, /* .SINGLESHELL */ 210 Stale, /* .STALE */ 211 Suffixes, /* .SUFFIXES */ 212 Wait, /* .WAIT */ 213 Attribute /* Generic attribute */ 214 } ParseSpecial; 215 216 /* 217 * Other tokens 218 */ 219 #define LPAREN '(' 220 #define RPAREN ')' 221 222 223 /* result data */ 224 225 /* 226 * The main target to create. This is the first target on the first 227 * dependency line in the first makefile. 228 */ 229 static GNode *mainNode; 230 231 /* eval state */ 232 233 /* targets we're working on */ 234 static Lst targets; 235 236 #ifdef CLEANUP 237 /* command lines for targets */ 238 static Lst targCmds; 239 #endif 240 241 /* 242 * specType contains the SPECial TYPE of the current target. It is 243 * Not if the target is unspecial. If it *is* special, however, the children 244 * are linked as children of the parent but not vice versa. This variable is 245 * set in ParseDoDependency 246 */ 247 static ParseSpecial specType; 248 249 /* 250 * Predecessor node for handling .ORDER. Initialized to NULL when .ORDER 251 * seen, then set to each successive source on the line. 252 */ 253 static GNode *predecessor; 254 255 /* parser state */ 256 257 /* true if currently in a dependency line or its commands */ 258 static Boolean inLine; 259 260 /* number of fatal errors */ 261 static int fatals = 0; 262 263 /* 264 * Variables for doing includes 265 */ 266 267 /* current file being read */ 268 static IFile *curFile; 269 270 /* The current file from the command line (at the bottom of the stack) and 271 * further up all the files that are currently being read due to nested 272 * .include directives. */ 273 static Stack /* of *IFile */ includes; 274 275 /* include paths (lists of directories) */ 276 Lst parseIncPath; /* dirs for "..." includes */ 277 Lst sysIncPath; /* dirs for <...> includes */ 278 Lst defIncPath; /* default for sysIncPath */ 279 280 /* parser tables */ 281 282 /* 283 * The parseKeywords table is searched using binary search when deciding 284 * if a target or source is special. The 'spec' field is the ParseSpecial 285 * type of the keyword ("Not" if the keyword isn't special as a target) while 286 * the 'op' field is the operator to apply to the list of targets if the 287 * keyword is used as a source ("0" if the keyword isn't special as a source) 288 */ 289 static const struct { 290 const char *name; /* Name of keyword */ 291 ParseSpecial spec; /* Type when used as a target */ 292 int op; /* Operator when used as a source */ 293 } parseKeywords[] = { 294 { ".BEGIN", Begin, 0 }, 295 { ".DEFAULT", Default, 0 }, 296 { ".DELETE_ON_ERROR", DeleteOnError, 0 }, 297 { ".END", End, 0 }, 298 { ".ERROR", dotError, 0 }, 299 { ".EXEC", Attribute, OP_EXEC }, 300 { ".IGNORE", Ignore, OP_IGNORE }, 301 { ".INCLUDES", Includes, 0 }, 302 { ".INTERRUPT", Interrupt, 0 }, 303 { ".INVISIBLE", Attribute, OP_INVISIBLE }, 304 { ".JOIN", Attribute, OP_JOIN }, 305 { ".LIBS", Libs, 0 }, 306 { ".MADE", Attribute, OP_MADE }, 307 { ".MAIN", Main, 0 }, 308 { ".MAKE", Attribute, OP_MAKE }, 309 { ".MAKEFLAGS", MFlags, 0 }, 310 { ".META", Meta, OP_META }, 311 { ".MFLAGS", MFlags, 0 }, 312 { ".NOMETA", NoMeta, OP_NOMETA }, 313 { ".NOMETA_CMP", NoMetaCmp, OP_NOMETA_CMP }, 314 { ".NOPATH", NoPath, OP_NOPATH }, 315 { ".NOTMAIN", Attribute, OP_NOTMAIN }, 316 { ".NOTPARALLEL", NotParallel, 0 }, 317 { ".NO_PARALLEL", NotParallel, 0 }, 318 { ".NULL", Null, 0 }, 319 { ".OBJDIR", ExObjdir, 0 }, 320 { ".OPTIONAL", Attribute, OP_OPTIONAL }, 321 { ".ORDER", Order, 0 }, 322 { ".PARALLEL", Parallel, 0 }, 323 { ".PATH", ExPath, 0 }, 324 { ".PHONY", Phony, OP_PHONY }, 325 #ifdef POSIX 326 { ".POSIX", Posix, 0 }, 327 #endif 328 { ".PRECIOUS", Precious, OP_PRECIOUS }, 329 { ".RECURSIVE", Attribute, OP_MAKE }, 330 { ".SHELL", ExShell, 0 }, 331 { ".SILENT", Silent, OP_SILENT }, 332 { ".SINGLESHELL", SingleShell, 0 }, 333 { ".STALE", Stale, 0 }, 334 { ".SUFFIXES", Suffixes, 0 }, 335 { ".USE", Attribute, OP_USE }, 336 { ".USEBEFORE", Attribute, OP_USEBEFORE }, 337 { ".WAIT", Wait, 0 }, 338 }; 339 340 /* local functions */ 341 342 static int ParseIsEscaped(const char *, const char *); 343 static void ParseErrorInternal(const char *, size_t, int, const char *, ...) 344 MAKE_ATTR_PRINTFLIKE(4,5); 345 static void ParseVErrorInternal(FILE *, const char *, size_t, int, const char *, va_list) 346 MAKE_ATTR_PRINTFLIKE(5, 0); 347 static int ParseFindKeyword(const char *); 348 static int ParseLinkSrc(void *, void *); 349 static int ParseDoOp(void *, void *); 350 static void ParseDoSrc(int, const char *); 351 static int ParseFindMain(void *, void *); 352 static int ParseAddDir(void *, void *); 353 static int ParseClearPath(void *, void *); 354 static void ParseDoDependency(char *); 355 static int ParseAddCmd(void *, void *); 356 static void ParseHasCommands(void *); 357 static void ParseDoInclude(char *); 358 static void ParseSetParseFile(const char *); 359 static void ParseSetIncludedFile(void); 360 #ifdef GMAKEEXPORT 361 static void ParseGmakeExport(char *); 362 #endif 363 static int ParseEOF(void); 364 static char *ParseReadLine(void); 365 static void ParseFinishLine(void); 366 static void ParseMark(GNode *); 367 368 /* file loader */ 369 370 struct loadedfile { 371 const char *path; /* name, for error reports */ 372 char *buf; /* contents buffer */ 373 size_t len; /* length of contents */ 374 size_t maplen; /* length of mmap area, or 0 */ 375 Boolean used; /* XXX: have we used the data yet */ 376 }; 377 378 /* 379 * Constructor/destructor for loadedfile 380 */ 381 static struct loadedfile * 382 loadedfile_create(const char *path) 383 { 384 struct loadedfile *lf; 385 386 lf = bmake_malloc(sizeof(*lf)); 387 lf->path = path == NULL ? "(stdin)" : path; 388 lf->buf = NULL; 389 lf->len = 0; 390 lf->maplen = 0; 391 lf->used = FALSE; 392 return lf; 393 } 394 395 static void 396 loadedfile_destroy(struct loadedfile *lf) 397 { 398 if (lf->buf != NULL) { 399 if (lf->maplen > 0) { 400 munmap(lf->buf, lf->maplen); 401 } else { 402 free(lf->buf); 403 } 404 } 405 free(lf); 406 } 407 408 /* 409 * nextbuf() operation for loadedfile, as needed by the weird and twisted 410 * logic below. Once that's cleaned up, we can get rid of lf->used... 411 */ 412 static char * 413 loadedfile_nextbuf(void *x, size_t *len) 414 { 415 struct loadedfile *lf = x; 416 417 if (lf->used) { 418 return NULL; 419 } 420 lf->used = TRUE; 421 *len = lf->len; 422 return lf->buf; 423 } 424 425 /* 426 * Try to get the size of a file. 427 */ 428 static Boolean 429 load_getsize(int fd, size_t *ret) 430 { 431 struct stat st; 432 433 if (fstat(fd, &st) < 0) { 434 return FALSE; 435 } 436 437 if (!S_ISREG(st.st_mode)) { 438 return FALSE; 439 } 440 441 /* 442 * st_size is an off_t, which is 64 bits signed; *ret is 443 * size_t, which might be 32 bits unsigned or 64 bits 444 * unsigned. Rather than being elaborate, just punt on 445 * files that are more than 2^31 bytes. We should never 446 * see a makefile that size in practice... 447 * 448 * While we're at it reject negative sizes too, just in case. 449 */ 450 if (st.st_size < 0 || st.st_size > 0x7fffffff) { 451 return FALSE; 452 } 453 454 *ret = (size_t) st.st_size; 455 return TRUE; 456 } 457 458 /* 459 * Read in a file. 460 * 461 * Until the path search logic can be moved under here instead of 462 * being in the caller in another source file, we need to have the fd 463 * passed in already open. Bleh. 464 * 465 * If the path is NULL use stdin and (to insure against fd leaks) 466 * assert that the caller passed in -1. 467 */ 468 static struct loadedfile * 469 loadfile(const char *path, int fd) 470 { 471 struct loadedfile *lf; 472 static long pagesize = 0; 473 ssize_t result; 474 size_t bufpos; 475 476 lf = loadedfile_create(path); 477 478 if (path == NULL) { 479 assert(fd == -1); 480 fd = STDIN_FILENO; 481 } else { 482 #if 0 /* notyet */ 483 fd = open(path, O_RDONLY); 484 if (fd < 0) { 485 ... 486 Error("%s: %s", path, strerror(errno)); 487 exit(1); 488 } 489 #endif 490 } 491 492 if (load_getsize(fd, &lf->len)) { 493 /* found a size, try mmap */ 494 if (pagesize == 0) 495 pagesize = sysconf(_SC_PAGESIZE); 496 if (pagesize <= 0) { 497 pagesize = 0x1000; 498 } 499 /* round size up to a page */ 500 lf->maplen = pagesize * ((lf->len + pagesize - 1)/pagesize); 501 502 /* 503 * XXX hack for dealing with empty files; remove when 504 * we're no longer limited by interfacing to the old 505 * logic elsewhere in this file. 506 */ 507 if (lf->maplen == 0) { 508 lf->maplen = pagesize; 509 } 510 511 /* 512 * FUTURE: remove PROT_WRITE when the parser no longer 513 * needs to scribble on the input. 514 */ 515 lf->buf = mmap(NULL, lf->maplen, PROT_READ|PROT_WRITE, 516 MAP_FILE|MAP_COPY, fd, 0); 517 if (lf->buf != MAP_FAILED) { 518 /* succeeded */ 519 if (lf->len == lf->maplen && lf->buf[lf->len - 1] != '\n') { 520 char *b = bmake_malloc(lf->len + 1); 521 b[lf->len] = '\n'; 522 memcpy(b, lf->buf, lf->len++); 523 munmap(lf->buf, lf->maplen); 524 lf->maplen = 0; 525 lf->buf = b; 526 } 527 goto done; 528 } 529 } 530 531 /* cannot mmap; load the traditional way */ 532 533 lf->maplen = 0; 534 lf->len = 1024; 535 lf->buf = bmake_malloc(lf->len); 536 537 bufpos = 0; 538 while (1) { 539 assert(bufpos <= lf->len); 540 if (bufpos == lf->len) { 541 if (lf->len > SIZE_MAX/2) { 542 errno = EFBIG; 543 Error("%s: file too large", path); 544 exit(1); 545 } 546 lf->len *= 2; 547 lf->buf = bmake_realloc(lf->buf, lf->len); 548 } 549 assert(bufpos < lf->len); 550 result = read(fd, lf->buf + bufpos, lf->len - bufpos); 551 if (result < 0) { 552 Error("%s: read error: %s", path, strerror(errno)); 553 exit(1); 554 } 555 if (result == 0) { 556 break; 557 } 558 bufpos += result; 559 } 560 assert(bufpos <= lf->len); 561 lf->len = bufpos; 562 563 /* truncate malloc region to actual length (maybe not useful) */ 564 if (lf->len > 0) { 565 /* as for mmap case, ensure trailing \n */ 566 if (lf->buf[lf->len - 1] != '\n') 567 lf->len++; 568 lf->buf = bmake_realloc(lf->buf, lf->len); 569 lf->buf[lf->len - 1] = '\n'; 570 } 571 572 done: 573 if (path != NULL) { 574 close(fd); 575 } 576 return lf; 577 } 578 579 /* old code */ 580 581 /*- 582 *---------------------------------------------------------------------- 583 * ParseIsEscaped -- 584 * Check if the current character is escaped on the current line 585 * 586 * Results: 587 * 0 if the character is not backslash escaped, 1 otherwise 588 * 589 * Side Effects: 590 * None 591 *---------------------------------------------------------------------- 592 */ 593 static int 594 ParseIsEscaped(const char *line, const char *c) 595 { 596 int active = 0; 597 for (;;) { 598 if (line == c) 599 return active; 600 if (*--c != '\\') 601 return active; 602 active = !active; 603 } 604 } 605 606 /*- 607 *---------------------------------------------------------------------- 608 * ParseFindKeyword -- 609 * Look in the table of keywords for one matching the given string. 610 * 611 * Input: 612 * str String to find 613 * 614 * Results: 615 * The index of the keyword, or -1 if it isn't there. 616 * 617 * Side Effects: 618 * None 619 *---------------------------------------------------------------------- 620 */ 621 static int 622 ParseFindKeyword(const char *str) 623 { 624 int start, end, cur; 625 int diff; 626 627 start = 0; 628 end = (sizeof(parseKeywords)/sizeof(parseKeywords[0])) - 1; 629 630 do { 631 cur = start + ((end - start) / 2); 632 diff = strcmp(str, parseKeywords[cur].name); 633 634 if (diff == 0) { 635 return cur; 636 } else if (diff < 0) { 637 end = cur - 1; 638 } else { 639 start = cur + 1; 640 } 641 } while (start <= end); 642 return -1; 643 } 644 645 /*- 646 * ParseVErrorInternal -- 647 * Error message abort function for parsing. Prints out the context 648 * of the error (line number and file) as well as the message with 649 * two optional arguments. 650 * 651 * Results: 652 * None 653 * 654 * Side Effects: 655 * "fatals" is incremented if the level is PARSE_FATAL. 656 */ 657 /* VARARGS */ 658 static void 659 ParseVErrorInternal(FILE *f, const char *cfname, size_t clineno, int type, 660 const char *fmt, va_list ap) 661 { 662 static Boolean fatal_warning_error_printed = FALSE; 663 char dirbuf[MAXPATHLEN+1]; 664 665 (void)fprintf(f, "%s: ", progname); 666 667 if (cfname != NULL) { 668 (void)fprintf(f, "\""); 669 if (*cfname != '/' && strcmp(cfname, "(stdin)") != 0) { 670 char *cp, *cp2; 671 const char *dir, *fname; 672 673 /* 674 * Nothing is more annoying than not knowing 675 * which Makefile is the culprit; we try ${.PARSEDIR} 676 * and apply realpath(3) if not absolute. 677 */ 678 dir = Var_Value(".PARSEDIR", VAR_GLOBAL, &cp); 679 if (dir == NULL) 680 dir = "."; 681 if (*dir != '/') { 682 dir = realpath(dir, dirbuf); 683 } 684 fname = Var_Value(".PARSEFILE", VAR_GLOBAL, &cp2); 685 if (fname == NULL) { 686 if ((fname = strrchr(cfname, '/'))) 687 fname++; 688 else 689 fname = cfname; 690 } 691 (void)fprintf(f, "%s/%s", dir, fname); 692 bmake_free(cp2); 693 bmake_free(cp); 694 } else 695 (void)fprintf(f, "%s", cfname); 696 697 (void)fprintf(f, "\" line %d: ", (int)clineno); 698 } 699 if (type == PARSE_WARNING) 700 (void)fprintf(f, "warning: "); 701 (void)vfprintf(f, fmt, ap); 702 (void)fprintf(f, "\n"); 703 (void)fflush(f); 704 if (type == PARSE_INFO) 705 return; 706 if (type == PARSE_FATAL || parseWarnFatal) 707 fatals += 1; 708 if (parseWarnFatal && !fatal_warning_error_printed) { 709 Error("parsing warnings being treated as errors"); 710 fatal_warning_error_printed = TRUE; 711 } 712 } 713 714 /*- 715 * ParseErrorInternal -- 716 * Error function 717 * 718 * Results: 719 * None 720 * 721 * Side Effects: 722 * None 723 */ 724 /* VARARGS */ 725 static void 726 ParseErrorInternal(const char *cfname, size_t clineno, int type, 727 const char *fmt, ...) 728 { 729 va_list ap; 730 731 va_start(ap, fmt); 732 (void)fflush(stdout); 733 ParseVErrorInternal(stderr, cfname, clineno, type, fmt, ap); 734 va_end(ap); 735 736 if (debug_file != stderr && debug_file != stdout) { 737 va_start(ap, fmt); 738 ParseVErrorInternal(debug_file, cfname, clineno, type, fmt, ap); 739 va_end(ap); 740 } 741 } 742 743 /*- 744 * Parse_Error -- 745 * External interface to ParseErrorInternal; uses the default filename 746 * Line number. 747 * 748 * Results: 749 * None 750 * 751 * Side Effects: 752 * None 753 */ 754 /* VARARGS */ 755 void 756 Parse_Error(int type, const char *fmt, ...) 757 { 758 va_list ap; 759 const char *fname; 760 size_t lineno; 761 762 if (curFile == NULL) { 763 fname = NULL; 764 lineno = 0; 765 } else { 766 fname = curFile->fname; 767 lineno = curFile->lineno; 768 } 769 770 va_start(ap, fmt); 771 (void)fflush(stdout); 772 ParseVErrorInternal(stderr, fname, lineno, type, fmt, ap); 773 va_end(ap); 774 775 if (debug_file != stderr && debug_file != stdout) { 776 va_start(ap, fmt); 777 ParseVErrorInternal(debug_file, fname, lineno, type, fmt, ap); 778 va_end(ap); 779 } 780 } 781 782 783 /* 784 * ParseMessage 785 * Parse a .info .warning or .error directive 786 * 787 * The input is the line minus the ".". We substitute 788 * variables, print the message and exit(1) (for .error) or just print 789 * a warning if the directive is malformed. 790 */ 791 static Boolean 792 ParseMessage(char *line) 793 { 794 int mtype; 795 796 switch(*line) { 797 case 'i': 798 mtype = PARSE_INFO; 799 break; 800 case 'w': 801 mtype = PARSE_WARNING; 802 break; 803 case 'e': 804 mtype = PARSE_FATAL; 805 break; 806 default: 807 Parse_Error(PARSE_WARNING, "invalid syntax: \".%s\"", line); 808 return FALSE; 809 } 810 811 while (isalpha((unsigned char)*line)) 812 line++; 813 if (!isspace((unsigned char)*line)) 814 return FALSE; /* not for us */ 815 while (isspace((unsigned char)*line)) 816 line++; 817 818 line = Var_Subst(line, VAR_CMD, VARE_WANTRES); 819 Parse_Error(mtype, "%s", line); 820 free(line); 821 822 if (mtype == PARSE_FATAL) { 823 /* Terminate immediately. */ 824 exit(1); 825 } 826 return TRUE; 827 } 828 829 /*- 830 *--------------------------------------------------------------------- 831 * ParseLinkSrc -- 832 * Link the parent node to its new child. Used in a Lst_ForEach by 833 * ParseDoDependency. If the specType isn't 'Not', the parent 834 * isn't linked as a parent of the child. 835 * 836 * Input: 837 * pgnp The parent node 838 * cgpn The child node 839 * 840 * Results: 841 * Always = 0 842 * 843 * Side Effects: 844 * New elements are added to the parents list of cgn and the 845 * children list of cgn. the unmade field of pgn is updated 846 * to reflect the additional child. 847 *--------------------------------------------------------------------- 848 */ 849 static int 850 ParseLinkSrc(void *pgnp, void *cgnp) 851 { 852 GNode *pgn = (GNode *)pgnp; 853 GNode *cgn = (GNode *)cgnp; 854 855 if ((pgn->type & OP_DOUBLEDEP) && !Lst_IsEmpty(pgn->cohorts)) 856 pgn = LstNode_Datum(Lst_Last(pgn->cohorts)); 857 Lst_Append(pgn->children, cgn); 858 if (specType == Not) 859 Lst_Append(cgn->parents, pgn); 860 pgn->unmade += 1; 861 if (DEBUG(PARSE)) { 862 fprintf(debug_file, "# %s: added child %s - %s\n", __func__, 863 pgn->name, cgn->name); 864 Targ_PrintNode(pgn, 0); 865 Targ_PrintNode(cgn, 0); 866 } 867 return 0; 868 } 869 870 /*- 871 *--------------------------------------------------------------------- 872 * ParseDoOp -- 873 * Apply the parsed operator to the given target node. Used in a 874 * Lst_ForEach call by ParseDoDependency once all targets have 875 * been found and their operator parsed. If the previous and new 876 * operators are incompatible, a major error is taken. 877 * 878 * Input: 879 * gnp The node to which the operator is to be applied 880 * opp The operator to apply 881 * 882 * Results: 883 * Always 0 884 * 885 * Side Effects: 886 * The type field of the node is altered to reflect any new bits in 887 * the op. 888 *--------------------------------------------------------------------- 889 */ 890 static int 891 ParseDoOp(void *gnp, void *opp) 892 { 893 GNode *gn = (GNode *)gnp; 894 int op = *(int *)opp; 895 /* 896 * If the dependency mask of the operator and the node don't match and 897 * the node has actually had an operator applied to it before, and 898 * the operator actually has some dependency information in it, complain. 899 */ 900 if (((op & OP_OPMASK) != (gn->type & OP_OPMASK)) && 901 !OP_NOP(gn->type) && !OP_NOP(op)) 902 { 903 Parse_Error(PARSE_FATAL, "Inconsistent operator for %s", gn->name); 904 return 1; 905 } 906 907 if (op == OP_DOUBLEDEP && (gn->type & OP_OPMASK) == OP_DOUBLEDEP) { 908 /* 909 * If the node was the object of a :: operator, we need to create a 910 * new instance of it for the children and commands on this dependency 911 * line. The new instance is placed on the 'cohorts' list of the 912 * initial one (note the initial one is not on its own cohorts list) 913 * and the new instance is linked to all parents of the initial 914 * instance. 915 */ 916 GNode *cohort; 917 918 /* 919 * Propagate copied bits to the initial node. They'll be propagated 920 * back to the rest of the cohorts later. 921 */ 922 gn->type |= op & ~OP_OPMASK; 923 924 cohort = Targ_FindNode(gn->name, TARG_NOHASH); 925 if (doing_depend) 926 ParseMark(cohort); 927 /* 928 * Make the cohort invisible as well to avoid duplicating it into 929 * other variables. True, parents of this target won't tend to do 930 * anything with their local variables, but better safe than 931 * sorry. (I think this is pointless now, since the relevant list 932 * traversals will no longer see this node anyway. -mycroft) 933 */ 934 cohort->type = op | OP_INVISIBLE; 935 Lst_Append(gn->cohorts, cohort); 936 cohort->centurion = gn; 937 gn->unmade_cohorts += 1; 938 snprintf(cohort->cohort_num, sizeof cohort->cohort_num, "#%d", 939 gn->unmade_cohorts); 940 } else { 941 /* 942 * We don't want to nuke any previous flags (whatever they were) so we 943 * just OR the new operator into the old 944 */ 945 gn->type |= op; 946 } 947 948 return 0; 949 } 950 951 /*- 952 *--------------------------------------------------------------------- 953 * ParseDoSrc -- 954 * Given the name of a source, figure out if it is an attribute 955 * and apply it to the targets if it is. Else decide if there is 956 * some attribute which should be applied *to* the source because 957 * of some special target and apply it if so. Otherwise, make the 958 * source be a child of the targets in the list 'targets' 959 * 960 * Input: 961 * tOp operator (if any) from special targets 962 * src name of the source to handle 963 * 964 * Results: 965 * None 966 * 967 * Side Effects: 968 * Operator bits may be added to the list of targets or to the source. 969 * The targets may have a new source added to their lists of children. 970 *--------------------------------------------------------------------- 971 */ 972 static void 973 ParseDoSrc(int tOp, const char *src) 974 { 975 GNode *gn = NULL; 976 static int wait_number = 0; 977 char wait_src[16]; 978 979 if (*src == '.' && isupper ((unsigned char)src[1])) { 980 int keywd = ParseFindKeyword(src); 981 if (keywd != -1) { 982 int op = parseKeywords[keywd].op; 983 if (op != 0) { 984 if (targets != NULL) 985 Lst_ForEach(targets, ParseDoOp, &op); 986 return; 987 } 988 if (parseKeywords[keywd].spec == Wait) { 989 /* 990 * We add a .WAIT node in the dependency list. 991 * After any dynamic dependencies (and filename globbing) 992 * have happened, it is given a dependency on the each 993 * previous child back to and previous .WAIT node. 994 * The next child won't be scheduled until the .WAIT node 995 * is built. 996 * We give each .WAIT node a unique name (mainly for diag). 997 */ 998 snprintf(wait_src, sizeof wait_src, ".WAIT_%u", ++wait_number); 999 gn = Targ_FindNode(wait_src, TARG_NOHASH); 1000 if (doing_depend) 1001 ParseMark(gn); 1002 gn->type = OP_WAIT | OP_PHONY | OP_DEPENDS | OP_NOTMAIN; 1003 if (targets != NULL) 1004 Lst_ForEach(targets, ParseLinkSrc, gn); 1005 return; 1006 } 1007 } 1008 } 1009 1010 switch (specType) { 1011 case Main: 1012 /* 1013 * If we have noted the existence of a .MAIN, it means we need 1014 * to add the sources of said target to the list of things 1015 * to create. The string 'src' is likely to be free, so we 1016 * must make a new copy of it. Note that this will only be 1017 * invoked if the user didn't specify a target on the command 1018 * line. This is to allow #ifmake's to succeed, or something... 1019 */ 1020 Lst_Append(create, bmake_strdup(src)); 1021 /* 1022 * Add the name to the .TARGETS variable as well, so the user can 1023 * employ that, if desired. 1024 */ 1025 Var_Append(".TARGETS", src, VAR_GLOBAL); 1026 return; 1027 1028 case Order: 1029 /* 1030 * Create proper predecessor/successor links between the previous 1031 * source and the current one. 1032 */ 1033 gn = Targ_FindNode(src, TARG_CREATE); 1034 if (doing_depend) 1035 ParseMark(gn); 1036 if (predecessor != NULL) { 1037 Lst_Append(predecessor->order_succ, gn); 1038 Lst_Append(gn->order_pred, predecessor); 1039 if (DEBUG(PARSE)) { 1040 fprintf(debug_file, "# %s: added Order dependency %s - %s\n", 1041 __func__, predecessor->name, gn->name); 1042 Targ_PrintNode(predecessor, 0); 1043 Targ_PrintNode(gn, 0); 1044 } 1045 } 1046 /* 1047 * The current source now becomes the predecessor for the next one. 1048 */ 1049 predecessor = gn; 1050 break; 1051 1052 default: 1053 /* 1054 * If the source is not an attribute, we need to find/create 1055 * a node for it. After that we can apply any operator to it 1056 * from a special target or link it to its parents, as 1057 * appropriate. 1058 * 1059 * In the case of a source that was the object of a :: operator, 1060 * the attribute is applied to all of its instances (as kept in 1061 * the 'cohorts' list of the node) or all the cohorts are linked 1062 * to all the targets. 1063 */ 1064 1065 /* Find/create the 'src' node and attach to all targets */ 1066 gn = Targ_FindNode(src, TARG_CREATE); 1067 if (doing_depend) 1068 ParseMark(gn); 1069 if (tOp) { 1070 gn->type |= tOp; 1071 } else { 1072 if (targets != NULL) 1073 Lst_ForEach(targets, ParseLinkSrc, gn); 1074 } 1075 break; 1076 } 1077 } 1078 1079 /*- 1080 *----------------------------------------------------------------------- 1081 * ParseFindMain -- 1082 * Find a real target in the list and set it to be the main one. 1083 * Called by ParseDoDependency when a main target hasn't been found 1084 * yet. 1085 * 1086 * Input: 1087 * gnp Node to examine 1088 * 1089 * Results: 1090 * 0 if main not found yet, 1 if it is. 1091 * 1092 * Side Effects: 1093 * mainNode is changed and Targ_SetMain is called. 1094 * 1095 *----------------------------------------------------------------------- 1096 */ 1097 static int 1098 ParseFindMain(void *gnp, void *dummy MAKE_ATTR_UNUSED) 1099 { 1100 GNode *gn = (GNode *)gnp; 1101 if (!(gn->type & OP_NOTARGET)) { 1102 mainNode = gn; 1103 Targ_SetMain(gn); 1104 return 1; 1105 } else { 1106 return 0; 1107 } 1108 } 1109 1110 /*- 1111 *----------------------------------------------------------------------- 1112 * ParseAddDir -- 1113 * Front-end for Dir_AddDir to make sure Lst_ForEach keeps going 1114 * 1115 * Results: 1116 * === 0 1117 * 1118 * Side Effects: 1119 * See Dir_AddDir. 1120 * 1121 *----------------------------------------------------------------------- 1122 */ 1123 static int 1124 ParseAddDir(void *path, void *name) 1125 { 1126 (void)Dir_AddDir((Lst) path, (char *)name); 1127 return 0; 1128 } 1129 1130 /*- 1131 *----------------------------------------------------------------------- 1132 * ParseClearPath -- 1133 * Front-end for Dir_ClearPath to make sure Lst_ForEach keeps going 1134 * 1135 * Results: 1136 * === 0 1137 * 1138 * Side Effects: 1139 * See Dir_ClearPath 1140 * 1141 *----------------------------------------------------------------------- 1142 */ 1143 static int 1144 ParseClearPath(void *path, void *dummy MAKE_ATTR_UNUSED) 1145 { 1146 Dir_ClearPath((Lst) path); 1147 return 0; 1148 } 1149 1150 /*- 1151 *--------------------------------------------------------------------- 1152 * ParseDoDependency -- 1153 * Parse the dependency line in line. 1154 * 1155 * Input: 1156 * line the line to parse 1157 * 1158 * Results: 1159 * None 1160 * 1161 * Side Effects: 1162 * The nodes of the sources are linked as children to the nodes of the 1163 * targets. Some nodes may be created. 1164 * 1165 * We parse a dependency line by first extracting words from the line and 1166 * finding nodes in the list of all targets with that name. This is done 1167 * until a character is encountered which is an operator character. Currently 1168 * these are only ! and :. At this point the operator is parsed and the 1169 * pointer into the line advanced until the first source is encountered. 1170 * The parsed operator is applied to each node in the 'targets' list, 1171 * which is where the nodes found for the targets are kept, by means of 1172 * the ParseDoOp function. 1173 * The sources are read in much the same way as the targets were except 1174 * that now they are expanded using the wildcarding scheme of the C-Shell 1175 * and all instances of the resulting words in the list of all targets 1176 * are found. Each of the resulting nodes is then linked to each of the 1177 * targets as one of its children. 1178 * Certain targets are handled specially. These are the ones detailed 1179 * by the specType variable. 1180 * The storing of transformation rules is also taken care of here. 1181 * A target is recognized as a transformation rule by calling 1182 * Suff_IsTransform. If it is a transformation rule, its node is gotten 1183 * from the suffix module via Suff_AddTransform rather than the standard 1184 * Targ_FindNode in the target module. 1185 *--------------------------------------------------------------------- 1186 */ 1187 static void 1188 ParseDoDependency(char *line) 1189 { 1190 char *cp; /* our current position */ 1191 GNode *gn = NULL; /* a general purpose temporary node */ 1192 int op; /* the operator on the line */ 1193 char savec; /* a place to save a character */ 1194 Lst paths; /* List of search paths to alter when parsing 1195 * a list of .PATH targets */ 1196 int tOp; /* operator from special target */ 1197 Lst sources; /* list of archive source names after 1198 * expansion */ 1199 Lst curTargs; /* list of target names to be found and added 1200 * to the targets list */ 1201 char *lstart = line; 1202 1203 if (DEBUG(PARSE)) 1204 fprintf(debug_file, "ParseDoDependency(%s)\n", line); 1205 tOp = 0; 1206 1207 specType = Not; 1208 paths = NULL; 1209 1210 curTargs = Lst_Init(); 1211 1212 /* 1213 * First, grind through the targets. 1214 */ 1215 1216 do { 1217 /* 1218 * Here LINE points to the beginning of the next word, and 1219 * LSTART points to the actual beginning of the line. 1220 */ 1221 1222 /* Find the end of the next word. */ 1223 for (cp = line; *cp && (ParseIsEscaped(lstart, cp) || 1224 !(isspace((unsigned char)*cp) || 1225 *cp == '!' || *cp == ':' || *cp == LPAREN)); 1226 cp++) { 1227 if (*cp == '$') { 1228 /* 1229 * Must be a dynamic source (would have been expanded 1230 * otherwise), so call the Var module to parse the puppy 1231 * so we can safely advance beyond it...There should be 1232 * no errors in this, as they would have been discovered 1233 * in the initial Var_Subst and we wouldn't be here. 1234 */ 1235 int length; 1236 void *freeIt; 1237 1238 (void)Var_Parse(cp, VAR_CMD, VARE_UNDEFERR|VARE_WANTRES, 1239 &length, &freeIt); 1240 free(freeIt); 1241 cp += length - 1; 1242 } 1243 } 1244 1245 /* 1246 * If the word is followed by a left parenthesis, it's the 1247 * name of an object file inside an archive (ar file). 1248 */ 1249 if (!ParseIsEscaped(lstart, cp) && *cp == LPAREN) { 1250 /* 1251 * Archives must be handled specially to make sure the OP_ARCHV 1252 * flag is set in their 'type' field, for one thing, and because 1253 * things like "archive(file1.o file2.o file3.o)" are permissible. 1254 * Arch_ParseArchive will set 'line' to be the first non-blank 1255 * after the archive-spec. It creates/finds nodes for the members 1256 * and places them on the given list, returning TRUE if all 1257 * went well and FALSE if there was an error in the 1258 * specification. On error, line should remain untouched. 1259 */ 1260 if (!Arch_ParseArchive(&line, targets, VAR_CMD)) { 1261 Parse_Error(PARSE_FATAL, 1262 "Error in archive specification: \"%s\"", line); 1263 goto out; 1264 } else { 1265 /* Done with this word; on to the next. */ 1266 cp = line; 1267 continue; 1268 } 1269 } 1270 1271 if (!*cp) { 1272 /* 1273 * We got to the end of the line while we were still 1274 * looking at targets. 1275 * 1276 * Ending a dependency line without an operator is a Bozo 1277 * no-no. As a heuristic, this is also often triggered by 1278 * undetected conflicts from cvs/rcs merges. 1279 */ 1280 if ((strncmp(line, "<<<<<<", 6) == 0) || 1281 (strncmp(line, "======", 6) == 0) || 1282 (strncmp(line, ">>>>>>", 6) == 0)) 1283 Parse_Error(PARSE_FATAL, 1284 "Makefile appears to contain unresolved cvs/rcs/??? merge conflicts"); 1285 else if (lstart[0] == '.') { 1286 const char *dirstart = lstart + 1; 1287 const char *dirend; 1288 while (isspace((unsigned char)*dirstart)) 1289 dirstart++; 1290 dirend = dirstart; 1291 while (isalnum((unsigned char)*dirend) || *dirend == '-') 1292 dirend++; 1293 Parse_Error(PARSE_FATAL, "Unknown directive \"%.*s\"", 1294 (int)(dirend - dirstart), dirstart); 1295 } else 1296 Parse_Error(PARSE_FATAL, "Need an operator"); 1297 goto out; 1298 } 1299 1300 /* Insert a null terminator. */ 1301 savec = *cp; 1302 *cp = '\0'; 1303 1304 /* 1305 * Got the word. See if it's a special target and if so set 1306 * specType to match it. 1307 */ 1308 if (*line == '.' && isupper ((unsigned char)line[1])) { 1309 /* 1310 * See if the target is a special target that must have it 1311 * or its sources handled specially. 1312 */ 1313 int keywd = ParseFindKeyword(line); 1314 if (keywd != -1) { 1315 if (specType == ExPath && parseKeywords[keywd].spec != ExPath) { 1316 Parse_Error(PARSE_FATAL, "Mismatched special targets"); 1317 goto out; 1318 } 1319 1320 specType = parseKeywords[keywd].spec; 1321 tOp = parseKeywords[keywd].op; 1322 1323 /* 1324 * Certain special targets have special semantics: 1325 * .PATH Have to set the dirSearchPath 1326 * variable too 1327 * .MAIN Its sources are only used if 1328 * nothing has been specified to 1329 * create. 1330 * .DEFAULT Need to create a node to hang 1331 * commands on, but we don't want 1332 * it in the graph, nor do we want 1333 * it to be the Main Target, so we 1334 * create it, set OP_NOTMAIN and 1335 * add it to the list, setting 1336 * DEFAULT to the new node for 1337 * later use. We claim the node is 1338 * A transformation rule to make 1339 * life easier later, when we'll 1340 * use Make_HandleUse to actually 1341 * apply the .DEFAULT commands. 1342 * .PHONY The list of targets 1343 * .NOPATH Don't search for file in the path 1344 * .STALE 1345 * .BEGIN 1346 * .END 1347 * .ERROR 1348 * .DELETE_ON_ERROR 1349 * .INTERRUPT Are not to be considered the 1350 * main target. 1351 * .NOTPARALLEL Make only one target at a time. 1352 * .SINGLESHELL Create a shell for each command. 1353 * .ORDER Must set initial predecessor to NULL 1354 */ 1355 switch (specType) { 1356 case ExPath: 1357 if (paths == NULL) { 1358 paths = Lst_Init(); 1359 } 1360 Lst_Append(paths, dirSearchPath); 1361 break; 1362 case Main: 1363 if (!Lst_IsEmpty(create)) { 1364 specType = Not; 1365 } 1366 break; 1367 case Begin: 1368 case End: 1369 case Stale: 1370 case dotError: 1371 case Interrupt: 1372 gn = Targ_FindNode(line, TARG_CREATE); 1373 if (doing_depend) 1374 ParseMark(gn); 1375 gn->type |= OP_NOTMAIN|OP_SPECIAL; 1376 Lst_Append(targets, gn); 1377 break; 1378 case Default: 1379 gn = Targ_NewGN(".DEFAULT"); 1380 gn->type |= (OP_NOTMAIN|OP_TRANSFORM); 1381 Lst_Append(targets, gn); 1382 DEFAULT = gn; 1383 break; 1384 case DeleteOnError: 1385 deleteOnError = TRUE; 1386 break; 1387 case NotParallel: 1388 maxJobs = 1; 1389 break; 1390 case SingleShell: 1391 compatMake = TRUE; 1392 break; 1393 case Order: 1394 predecessor = NULL; 1395 break; 1396 default: 1397 break; 1398 } 1399 } else if (strncmp(line, ".PATH", 5) == 0) { 1400 /* 1401 * .PATH<suffix> has to be handled specially. 1402 * Call on the suffix module to give us a path to 1403 * modify. 1404 */ 1405 Lst path; 1406 1407 specType = ExPath; 1408 path = Suff_GetPath(&line[5]); 1409 if (path == NULL) { 1410 Parse_Error(PARSE_FATAL, 1411 "Suffix '%s' not defined (yet)", 1412 &line[5]); 1413 goto out; 1414 } else { 1415 if (paths == NULL) { 1416 paths = Lst_Init(); 1417 } 1418 Lst_Append(paths, path); 1419 } 1420 } 1421 } 1422 1423 /* 1424 * Have word in line. Get or create its node and stick it at 1425 * the end of the targets list 1426 */ 1427 if (specType == Not && *line != '\0') { 1428 if (Dir_HasWildcards(line)) { 1429 /* 1430 * Targets are to be sought only in the current directory, 1431 * so create an empty path for the thing. Note we need to 1432 * use Dir_Destroy in the destruction of the path as the 1433 * Dir module could have added a directory to the path... 1434 */ 1435 Lst emptyPath = Lst_Init(); 1436 1437 Dir_Expand(line, emptyPath, curTargs); 1438 1439 Lst_Destroy(emptyPath, Dir_Destroy); 1440 } else { 1441 /* 1442 * No wildcards, but we want to avoid code duplication, 1443 * so create a list with the word on it. 1444 */ 1445 Lst_Append(curTargs, line); 1446 } 1447 1448 /* Apply the targets. */ 1449 1450 while(!Lst_IsEmpty(curTargs)) { 1451 char *targName = Lst_Dequeue(curTargs); 1452 1453 if (!Suff_IsTransform (targName)) { 1454 gn = Targ_FindNode(targName, TARG_CREATE); 1455 } else { 1456 gn = Suff_AddTransform(targName); 1457 } 1458 if (doing_depend) 1459 ParseMark(gn); 1460 1461 Lst_Append(targets, gn); 1462 } 1463 } else if (specType == ExPath && *line != '.' && *line != '\0') { 1464 Parse_Error(PARSE_WARNING, "Extra target (%s) ignored", line); 1465 } 1466 1467 /* Don't need the inserted null terminator any more. */ 1468 *cp = savec; 1469 1470 /* 1471 * If it is a special type and not .PATH, it's the only target we 1472 * allow on this line... 1473 */ 1474 if (specType != Not && specType != ExPath) { 1475 Boolean warning = FALSE; 1476 1477 while (*cp && (ParseIsEscaped(lstart, cp) || 1478 (*cp != '!' && *cp != ':'))) { 1479 if (ParseIsEscaped(lstart, cp) || 1480 (*cp != ' ' && *cp != '\t')) { 1481 warning = TRUE; 1482 } 1483 cp++; 1484 } 1485 if (warning) { 1486 Parse_Error(PARSE_WARNING, "Extra target ignored"); 1487 } 1488 } else { 1489 while (*cp && isspace ((unsigned char)*cp)) { 1490 cp++; 1491 } 1492 } 1493 line = cp; 1494 } while (*line && (ParseIsEscaped(lstart, line) || 1495 (*line != '!' && *line != ':'))); 1496 1497 /* 1498 * Don't need the list of target names anymore... 1499 */ 1500 Lst_Free(curTargs); 1501 curTargs = NULL; 1502 1503 if (targets != NULL && !Lst_IsEmpty(targets)) { 1504 switch(specType) { 1505 default: 1506 Parse_Error(PARSE_WARNING, "Special and mundane targets don't mix. Mundane ones ignored"); 1507 break; 1508 case Default: 1509 case Stale: 1510 case Begin: 1511 case End: 1512 case dotError: 1513 case Interrupt: 1514 /* 1515 * These four create nodes on which to hang commands, so 1516 * targets shouldn't be empty... 1517 */ 1518 case Not: 1519 /* 1520 * Nothing special here -- targets can be empty if it wants. 1521 */ 1522 break; 1523 } 1524 } 1525 1526 /* 1527 * Have now parsed all the target names. Must parse the operator next. The 1528 * result is left in op . 1529 */ 1530 if (*cp == '!') { 1531 op = OP_FORCE; 1532 } else if (*cp == ':') { 1533 if (cp[1] == ':') { 1534 op = OP_DOUBLEDEP; 1535 cp++; 1536 } else { 1537 op = OP_DEPENDS; 1538 } 1539 } else { 1540 Parse_Error(PARSE_FATAL, lstart[0] == '.' ? "Unknown directive" 1541 : "Missing dependency operator"); 1542 goto out; 1543 } 1544 1545 /* Advance beyond the operator */ 1546 cp++; 1547 1548 /* 1549 * Apply the operator to the target. This is how we remember which 1550 * operator a target was defined with. It fails if the operator 1551 * used isn't consistent across all references. 1552 */ 1553 if (targets != NULL) 1554 Lst_ForEach(targets, ParseDoOp, &op); 1555 1556 /* 1557 * Onward to the sources. 1558 * 1559 * LINE will now point to the first source word, if any, or the 1560 * end of the string if not. 1561 */ 1562 while (*cp && isspace ((unsigned char)*cp)) { 1563 cp++; 1564 } 1565 line = cp; 1566 1567 /* 1568 * Several special targets take different actions if present with no 1569 * sources: 1570 * a .SUFFIXES line with no sources clears out all old suffixes 1571 * a .PRECIOUS line makes all targets precious 1572 * a .IGNORE line ignores errors for all targets 1573 * a .SILENT line creates silence when making all targets 1574 * a .PATH removes all directories from the search path(s). 1575 */ 1576 if (!*line) { 1577 switch (specType) { 1578 case Suffixes: 1579 Suff_ClearSuffixes(); 1580 break; 1581 case Precious: 1582 allPrecious = TRUE; 1583 break; 1584 case Ignore: 1585 ignoreErrors = TRUE; 1586 break; 1587 case Silent: 1588 beSilent = TRUE; 1589 break; 1590 case ExPath: 1591 if (paths != NULL) 1592 Lst_ForEach(paths, ParseClearPath, NULL); 1593 Dir_SetPATH(); 1594 break; 1595 #ifdef POSIX 1596 case Posix: 1597 Var_Set("%POSIX", "1003.2", VAR_GLOBAL); 1598 break; 1599 #endif 1600 default: 1601 break; 1602 } 1603 } else if (specType == MFlags) { 1604 /* 1605 * Call on functions in main.c to deal with these arguments and 1606 * set the initial character to a null-character so the loop to 1607 * get sources won't get anything 1608 */ 1609 Main_ParseArgLine(line); 1610 *line = '\0'; 1611 } else if (specType == ExShell) { 1612 if (!Job_ParseShell(line)) { 1613 Parse_Error(PARSE_FATAL, "improper shell specification"); 1614 goto out; 1615 } 1616 *line = '\0'; 1617 } else if (specType == NotParallel || specType == SingleShell || 1618 specType == DeleteOnError) { 1619 *line = '\0'; 1620 } 1621 1622 /* 1623 * NOW GO FOR THE SOURCES 1624 */ 1625 if (specType == Suffixes || specType == ExPath || 1626 specType == Includes || specType == Libs || 1627 specType == Null || specType == ExObjdir) 1628 { 1629 while (*line) { 1630 /* 1631 * If the target was one that doesn't take files as its sources 1632 * but takes something like suffixes, we take each 1633 * space-separated word on the line as a something and deal 1634 * with it accordingly. 1635 * 1636 * If the target was .SUFFIXES, we take each source as a 1637 * suffix and add it to the list of suffixes maintained by the 1638 * Suff module. 1639 * 1640 * If the target was a .PATH, we add the source as a directory 1641 * to search on the search path. 1642 * 1643 * If it was .INCLUDES, the source is taken to be the suffix of 1644 * files which will be #included and whose search path should 1645 * be present in the .INCLUDES variable. 1646 * 1647 * If it was .LIBS, the source is taken to be the suffix of 1648 * files which are considered libraries and whose search path 1649 * should be present in the .LIBS variable. 1650 * 1651 * If it was .NULL, the source is the suffix to use when a file 1652 * has no valid suffix. 1653 * 1654 * If it was .OBJDIR, the source is a new definition for .OBJDIR, 1655 * and will cause make to do a new chdir to that path. 1656 */ 1657 while (*cp && !isspace ((unsigned char)*cp)) { 1658 cp++; 1659 } 1660 savec = *cp; 1661 *cp = '\0'; 1662 switch (specType) { 1663 case Suffixes: 1664 Suff_AddSuffix(line, &mainNode); 1665 break; 1666 case ExPath: 1667 if (paths != NULL) 1668 Lst_ForEach(paths, ParseAddDir, line); 1669 break; 1670 case Includes: 1671 Suff_AddInclude(line); 1672 break; 1673 case Libs: 1674 Suff_AddLib(line); 1675 break; 1676 case Null: 1677 Suff_SetNull(line); 1678 break; 1679 case ExObjdir: 1680 Main_SetObjdir("%s", line); 1681 break; 1682 default: 1683 break; 1684 } 1685 *cp = savec; 1686 if (savec != '\0') { 1687 cp++; 1688 } 1689 while (*cp && isspace ((unsigned char)*cp)) { 1690 cp++; 1691 } 1692 line = cp; 1693 } 1694 if (paths) { 1695 Lst_Free(paths); 1696 paths = NULL; 1697 } 1698 if (specType == ExPath) 1699 Dir_SetPATH(); 1700 } else { 1701 assert(paths == NULL); 1702 while (*line) { 1703 /* 1704 * The targets take real sources, so we must beware of archive 1705 * specifications (i.e. things with left parentheses in them) 1706 * and handle them accordingly. 1707 */ 1708 for (; *cp && !isspace ((unsigned char)*cp); cp++) { 1709 if (*cp == LPAREN && cp > line && cp[-1] != '$') { 1710 /* 1711 * Only stop for a left parenthesis if it isn't at the 1712 * start of a word (that'll be for variable changes 1713 * later) and isn't preceded by a dollar sign (a dynamic 1714 * source). 1715 */ 1716 break; 1717 } 1718 } 1719 1720 if (*cp == LPAREN) { 1721 sources = Lst_Init(); 1722 if (!Arch_ParseArchive(&line, sources, VAR_CMD)) { 1723 Parse_Error(PARSE_FATAL, 1724 "Error in source archive spec \"%s\"", line); 1725 goto out; 1726 } 1727 1728 while (!Lst_IsEmpty(sources)) { 1729 gn = Lst_Dequeue(sources); 1730 ParseDoSrc(tOp, gn->name); 1731 } 1732 Lst_Free(sources); 1733 cp = line; 1734 } else { 1735 if (*cp) { 1736 *cp = '\0'; 1737 cp += 1; 1738 } 1739 1740 ParseDoSrc(tOp, line); 1741 } 1742 while (*cp && isspace ((unsigned char)*cp)) { 1743 cp++; 1744 } 1745 line = cp; 1746 } 1747 } 1748 1749 if (mainNode == NULL && targets != NULL) { 1750 /* 1751 * If we have yet to decide on a main target to make, in the 1752 * absence of any user input, we want the first target on 1753 * the first dependency line that is actually a real target 1754 * (i.e. isn't a .USE or .EXEC rule) to be made. 1755 */ 1756 Lst_ForEach(targets, ParseFindMain, NULL); 1757 } 1758 1759 out: 1760 if (paths != NULL) 1761 Lst_Free(paths); 1762 if (curTargs != NULL) 1763 Lst_Free(curTargs); 1764 } 1765 1766 /*- 1767 *--------------------------------------------------------------------- 1768 * Parse_IsVar -- 1769 * Return TRUE if the passed line is a variable assignment. A variable 1770 * assignment consists of a single word followed by optional whitespace 1771 * followed by either a += or an = operator. 1772 * This function is used both by the Parse_File function and main when 1773 * parsing the command-line arguments. 1774 * 1775 * Input: 1776 * line the line to check 1777 * 1778 * Results: 1779 * TRUE if it is. FALSE if it ain't 1780 * 1781 * Side Effects: 1782 * none 1783 *--------------------------------------------------------------------- 1784 */ 1785 Boolean 1786 Parse_IsVar(char *line) 1787 { 1788 Boolean wasSpace = FALSE; /* set TRUE if found a space */ 1789 char ch; 1790 int level = 0; 1791 #define ISEQOPERATOR(c) \ 1792 (((c) == '+') || ((c) == ':') || ((c) == '?') || ((c) == '!')) 1793 1794 /* 1795 * Skip to variable name 1796 */ 1797 while (*line == ' ' || *line == '\t') 1798 line++; 1799 1800 /* Scan for one of the assignment operators outside a variable expansion */ 1801 while ((ch = *line++) != 0) { 1802 if (ch == '(' || ch == '{') { 1803 level++; 1804 continue; 1805 } 1806 if (ch == ')' || ch == '}') { 1807 level--; 1808 continue; 1809 } 1810 if (level != 0) 1811 continue; 1812 while (ch == ' ' || ch == '\t') { 1813 ch = *line++; 1814 wasSpace = TRUE; 1815 } 1816 #ifdef SUNSHCMD 1817 if (ch == ':' && strncmp(line, "sh", 2) == 0) { 1818 line += 2; 1819 continue; 1820 } 1821 #endif 1822 if (ch == '=') 1823 return TRUE; 1824 if (*line == '=' && ISEQOPERATOR(ch)) 1825 return TRUE; 1826 if (wasSpace) 1827 return FALSE; 1828 } 1829 1830 return FALSE; 1831 } 1832 1833 /*- 1834 *--------------------------------------------------------------------- 1835 * Parse_DoVar -- 1836 * Take the variable assignment in the passed line and do it in the 1837 * global context. 1838 * 1839 * Note: There is a lexical ambiguity with assignment modifier characters 1840 * in variable names. This routine interprets the character before the = 1841 * as a modifier. Therefore, an assignment like 1842 * C++=/usr/bin/CC 1843 * is interpreted as "C+ +=" instead of "C++ =". 1844 * 1845 * Input: 1846 * line a line guaranteed to be a variable assignment. 1847 * This reduces error checks 1848 * ctxt Context in which to do the assignment 1849 * 1850 * Results: 1851 * none 1852 * 1853 * Side Effects: 1854 * the variable structure of the given variable name is altered in the 1855 * global context. 1856 *--------------------------------------------------------------------- 1857 */ 1858 void 1859 Parse_DoVar(char *line, GNode *ctxt) 1860 { 1861 char *cp; /* pointer into line */ 1862 enum { 1863 VAR_SUBST, VAR_APPEND, VAR_SHELL, VAR_NORMAL 1864 } type; /* Type of assignment */ 1865 char *opc; /* ptr to operator character to 1866 * null-terminate the variable name */ 1867 Boolean freeCp = FALSE; /* TRUE if cp needs to be freed, 1868 * i.e. if any variable expansion was 1869 * performed */ 1870 int depth; 1871 1872 /* 1873 * Skip to variable name 1874 */ 1875 while (*line == ' ' || *line == '\t') 1876 line++; 1877 1878 /* 1879 * Skip to operator character, nulling out whitespace as we go 1880 * XXX Rather than counting () and {} we should look for $ and 1881 * then expand the variable. 1882 */ 1883 for (depth = 0, cp = line; depth > 0 || *cp != '='; cp++) { 1884 if (*cp == '(' || *cp == '{') { 1885 depth++; 1886 continue; 1887 } 1888 if (*cp == ')' || *cp == '}') { 1889 depth--; 1890 continue; 1891 } 1892 if (depth == 0 && isspace ((unsigned char)*cp)) { 1893 *cp = '\0'; 1894 } 1895 } 1896 opc = cp-1; /* operator is the previous character */ 1897 *cp++ = '\0'; /* nuke the = */ 1898 1899 /* 1900 * Check operator type 1901 */ 1902 switch (*opc) { 1903 case '+': 1904 type = VAR_APPEND; 1905 *opc = '\0'; 1906 break; 1907 1908 case '?': 1909 /* 1910 * If the variable already has a value, we don't do anything. 1911 */ 1912 *opc = '\0'; 1913 if (Var_Exists(line, ctxt)) { 1914 return; 1915 } else { 1916 type = VAR_NORMAL; 1917 } 1918 break; 1919 1920 case ':': 1921 type = VAR_SUBST; 1922 *opc = '\0'; 1923 break; 1924 1925 case '!': 1926 type = VAR_SHELL; 1927 *opc = '\0'; 1928 break; 1929 1930 default: 1931 #ifdef SUNSHCMD 1932 while (opc > line && *opc != ':') 1933 opc--; 1934 1935 if (strncmp(opc, ":sh", 3) == 0) { 1936 type = VAR_SHELL; 1937 *opc = '\0'; 1938 break; 1939 } 1940 #endif 1941 type = VAR_NORMAL; 1942 break; 1943 } 1944 1945 while (isspace((unsigned char)*cp)) 1946 cp++; 1947 1948 if (DEBUG(LINT)) { 1949 if (type != VAR_SUBST && strchr(cp, '$') != NULL) { 1950 /* sanity check now */ 1951 char *cp2; 1952 1953 cp2 = Var_Subst(cp, ctxt, VARE_ASSIGN); 1954 free(cp2); 1955 } 1956 } 1957 1958 if (type == VAR_APPEND) { 1959 Var_Append(line, cp, ctxt); 1960 } else if (type == VAR_SUBST) { 1961 /* 1962 * Allow variables in the old value to be undefined, but leave their 1963 * invocation alone -- this is done by forcing oldVars to be false. 1964 * XXX: This can cause recursive variables, but that's not hard to do, 1965 * and this allows someone to do something like 1966 * 1967 * CFLAGS = $(.INCLUDES) 1968 * CFLAGS := -I.. $(CFLAGS) 1969 * 1970 * And not get an error. 1971 */ 1972 Boolean oldOldVars = oldVars; 1973 1974 oldVars = FALSE; 1975 1976 /* 1977 * make sure that we set the variable the first time to nothing 1978 * so that it gets substituted! 1979 */ 1980 if (!Var_Exists(line, ctxt)) 1981 Var_Set(line, "", ctxt); 1982 1983 cp = Var_Subst(cp, ctxt, VARE_WANTRES|VARE_ASSIGN); 1984 oldVars = oldOldVars; 1985 freeCp = TRUE; 1986 1987 Var_Set(line, cp, ctxt); 1988 } else if (type == VAR_SHELL) { 1989 char *res; 1990 const char *error; 1991 1992 if (strchr(cp, '$') != NULL) { 1993 /* 1994 * There's a dollar sign in the command, so perform variable 1995 * expansion on the whole thing. The resulting string will need 1996 * freeing when we're done. 1997 */ 1998 cp = Var_Subst(cp, VAR_CMD, VARE_UNDEFERR|VARE_WANTRES); 1999 freeCp = TRUE; 2000 } 2001 2002 res = Cmd_Exec(cp, &error); 2003 Var_Set(line, res, ctxt); 2004 free(res); 2005 2006 if (error) 2007 Parse_Error(PARSE_WARNING, error, cp); 2008 } else { 2009 /* 2010 * Normal assignment -- just do it. 2011 */ 2012 Var_Set(line, cp, ctxt); 2013 } 2014 if (strcmp(line, MAKEOVERRIDES) == 0) 2015 Main_ExportMAKEFLAGS(FALSE); /* re-export MAKEFLAGS */ 2016 else if (strcmp(line, ".CURDIR") == 0) { 2017 /* 2018 * Somone is being (too?) clever... 2019 * Let's pretend they know what they are doing and 2020 * re-initialize the 'cur' Path. 2021 */ 2022 Dir_InitCur(cp); 2023 Dir_SetPATH(); 2024 } else if (strcmp(line, MAKE_JOB_PREFIX) == 0) { 2025 Job_SetPrefix(); 2026 } else if (strcmp(line, MAKE_EXPORTED) == 0) { 2027 Var_Export(cp, FALSE); 2028 } 2029 if (freeCp) 2030 free(cp); 2031 } 2032 2033 2034 /* 2035 * ParseMaybeSubMake -- 2036 * Scan the command string to see if it a possible submake node 2037 * Input: 2038 * cmd the command to scan 2039 * Results: 2040 * TRUE if the command is possibly a submake, FALSE if not. 2041 */ 2042 static Boolean 2043 ParseMaybeSubMake(const char *cmd) 2044 { 2045 size_t i; 2046 static struct { 2047 const char *name; 2048 size_t len; 2049 } vals[] = { 2050 #define MKV(A) { A, sizeof(A) - 1 } 2051 MKV("${MAKE}"), 2052 MKV("${.MAKE}"), 2053 MKV("$(MAKE)"), 2054 MKV("$(.MAKE)"), 2055 MKV("make"), 2056 }; 2057 for (i = 0; i < sizeof(vals)/sizeof(vals[0]); i++) { 2058 char *ptr; 2059 if ((ptr = strstr(cmd, vals[i].name)) == NULL) 2060 continue; 2061 if ((ptr == cmd || !isalnum((unsigned char)ptr[-1])) 2062 && !isalnum((unsigned char)ptr[vals[i].len])) 2063 return TRUE; 2064 } 2065 return FALSE; 2066 } 2067 2068 /*- 2069 * ParseAddCmd -- 2070 * Lst_ForEach function to add a command line to all targets 2071 * 2072 * Input: 2073 * gnp the node to which the command is to be added 2074 * cmd the command to add 2075 * 2076 * Results: 2077 * Always 0 2078 * 2079 * Side Effects: 2080 * A new element is added to the commands list of the node, 2081 * and the node can be marked as a submake node if the command is 2082 * determined to be that. 2083 */ 2084 static int 2085 ParseAddCmd(void *gnp, void *cmd) 2086 { 2087 GNode *gn = (GNode *)gnp; 2088 2089 /* Add to last (ie current) cohort for :: targets */ 2090 if ((gn->type & OP_DOUBLEDEP) && !Lst_IsEmpty(gn->cohorts)) 2091 gn = LstNode_Datum(Lst_Last(gn->cohorts)); 2092 2093 /* if target already supplied, ignore commands */ 2094 if (!(gn->type & OP_HAS_COMMANDS)) { 2095 Lst_Append(gn->commands, cmd); 2096 if (ParseMaybeSubMake(cmd)) 2097 gn->type |= OP_SUBMAKE; 2098 ParseMark(gn); 2099 } else { 2100 #ifdef notyet 2101 /* XXX: We cannot do this until we fix the tree */ 2102 Lst_Append(gn->commands, cmd); 2103 Parse_Error(PARSE_WARNING, 2104 "overriding commands for target \"%s\"; " 2105 "previous commands defined at %s: %d ignored", 2106 gn->name, gn->fname, gn->lineno); 2107 #else 2108 Parse_Error(PARSE_WARNING, 2109 "duplicate script for target \"%s\" ignored", 2110 gn->name); 2111 ParseErrorInternal(gn->fname, gn->lineno, PARSE_WARNING, 2112 "using previous script for \"%s\" defined here", 2113 gn->name); 2114 #endif 2115 } 2116 return 0; 2117 } 2118 2119 /*- 2120 *----------------------------------------------------------------------- 2121 * ParseHasCommands -- 2122 * Callback procedure for Parse_File when destroying the list of 2123 * targets on the last dependency line. Marks a target as already 2124 * having commands if it does, to keep from having shell commands 2125 * on multiple dependency lines. 2126 * 2127 * Input: 2128 * gnp Node to examine 2129 * 2130 * Results: 2131 * None 2132 * 2133 * Side Effects: 2134 * OP_HAS_COMMANDS may be set for the target. 2135 * 2136 *----------------------------------------------------------------------- 2137 */ 2138 static void 2139 ParseHasCommands(void *gnp) 2140 { 2141 GNode *gn = (GNode *)gnp; 2142 if (!Lst_IsEmpty(gn->commands)) { 2143 gn->type |= OP_HAS_COMMANDS; 2144 } 2145 } 2146 2147 /*- 2148 *----------------------------------------------------------------------- 2149 * Parse_AddIncludeDir -- 2150 * Add a directory to the path searched for included makefiles 2151 * bracketed by double-quotes. Used by functions in main.c 2152 * 2153 * Input: 2154 * dir The name of the directory to add 2155 * 2156 * Results: 2157 * None. 2158 * 2159 * Side Effects: 2160 * The directory is appended to the list. 2161 * 2162 *----------------------------------------------------------------------- 2163 */ 2164 void 2165 Parse_AddIncludeDir(char *dir) 2166 { 2167 (void)Dir_AddDir(parseIncPath, dir); 2168 } 2169 2170 /*- 2171 *--------------------------------------------------------------------- 2172 * ParseDoInclude -- 2173 * Push to another file. 2174 * 2175 * The input is the line minus the `.'. A file spec is a string 2176 * enclosed in <> or "". The former is looked for only in sysIncPath. 2177 * The latter in . and the directories specified by -I command line 2178 * options 2179 * 2180 * Results: 2181 * None 2182 * 2183 * Side Effects: 2184 * A structure is added to the includes Lst and readProc, lineno, 2185 * fname and curFILE are altered for the new file 2186 *--------------------------------------------------------------------- 2187 */ 2188 2189 static void 2190 Parse_include_file(char *file, Boolean isSystem, Boolean depinc, int silent) 2191 { 2192 struct loadedfile *lf; 2193 char *fullname; /* full pathname of file */ 2194 char *newName; 2195 char *prefEnd, *incdir; 2196 int fd; 2197 int i; 2198 2199 /* 2200 * Now we know the file's name and its search path, we attempt to 2201 * find the durn thing. A return of NULL indicates the file don't 2202 * exist. 2203 */ 2204 fullname = file[0] == '/' ? bmake_strdup(file) : NULL; 2205 2206 if (fullname == NULL && !isSystem) { 2207 /* 2208 * Include files contained in double-quotes are first searched for 2209 * relative to the including file's location. We don't want to 2210 * cd there, of course, so we just tack on the old file's 2211 * leading path components and call Dir_FindFile to see if 2212 * we can locate the beast. 2213 */ 2214 2215 incdir = bmake_strdup(curFile->fname); 2216 prefEnd = strrchr(incdir, '/'); 2217 if (prefEnd != NULL) { 2218 *prefEnd = '\0'; 2219 /* Now do lexical processing of leading "../" on the filename */ 2220 for (i = 0; strncmp(file + i, "../", 3) == 0; i += 3) { 2221 prefEnd = strrchr(incdir + 1, '/'); 2222 if (prefEnd == NULL || strcmp(prefEnd, "/..") == 0) 2223 break; 2224 *prefEnd = '\0'; 2225 } 2226 newName = str_concat3(incdir, "/", file + i); 2227 fullname = Dir_FindFile(newName, parseIncPath); 2228 if (fullname == NULL) 2229 fullname = Dir_FindFile(newName, dirSearchPath); 2230 free(newName); 2231 } 2232 free(incdir); 2233 2234 if (fullname == NULL) { 2235 /* 2236 * Makefile wasn't found in same directory as included makefile. 2237 * Search for it first on the -I search path, 2238 * then on the .PATH search path, if not found in a -I directory. 2239 * If we have a suffix specific path we should use that. 2240 */ 2241 char *suff; 2242 Lst suffPath = NULL; 2243 2244 if ((suff = strrchr(file, '.'))) { 2245 suffPath = Suff_GetPath(suff); 2246 if (suffPath != NULL) { 2247 fullname = Dir_FindFile(file, suffPath); 2248 } 2249 } 2250 if (fullname == NULL) { 2251 fullname = Dir_FindFile(file, parseIncPath); 2252 if (fullname == NULL) { 2253 fullname = Dir_FindFile(file, dirSearchPath); 2254 } 2255 } 2256 } 2257 } 2258 2259 /* Looking for a system file or file still not found */ 2260 if (fullname == NULL) { 2261 /* 2262 * Look for it on the system path 2263 */ 2264 fullname = Dir_FindFile(file, 2265 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath); 2266 } 2267 2268 if (fullname == NULL) { 2269 if (!silent) 2270 Parse_Error(PARSE_FATAL, "Could not find %s", file); 2271 return; 2272 } 2273 2274 /* Actually open the file... */ 2275 fd = open(fullname, O_RDONLY); 2276 if (fd == -1) { 2277 if (!silent) 2278 Parse_Error(PARSE_FATAL, "Cannot open %s", fullname); 2279 free(fullname); 2280 return; 2281 } 2282 2283 /* load it */ 2284 lf = loadfile(fullname, fd); 2285 2286 ParseSetIncludedFile(); 2287 /* Start reading from this file next */ 2288 Parse_SetInput(fullname, 0, -1, loadedfile_nextbuf, lf); 2289 curFile->lf = lf; 2290 if (depinc) 2291 doing_depend = depinc; /* only turn it on */ 2292 } 2293 2294 static void 2295 ParseDoInclude(char *line) 2296 { 2297 char endc; /* the character which ends the file spec */ 2298 char *cp; /* current position in file spec */ 2299 int silent = *line != 'i'; 2300 char *file = &line[7 + silent]; 2301 2302 /* Skip to delimiter character so we know where to look */ 2303 while (*file == ' ' || *file == '\t') 2304 file++; 2305 2306 if (*file != '"' && *file != '<') { 2307 Parse_Error(PARSE_FATAL, 2308 ".include filename must be delimited by '\"' or '<'"); 2309 return; 2310 } 2311 2312 /* 2313 * Set the search path on which to find the include file based on the 2314 * characters which bracket its name. Angle-brackets imply it's 2315 * a system Makefile while double-quotes imply it's a user makefile 2316 */ 2317 if (*file == '<') { 2318 endc = '>'; 2319 } else { 2320 endc = '"'; 2321 } 2322 2323 /* Skip to matching delimiter */ 2324 for (cp = ++file; *cp && *cp != endc; cp++) 2325 continue; 2326 2327 if (*cp != endc) { 2328 Parse_Error(PARSE_FATAL, 2329 "Unclosed %cinclude filename. '%c' expected", 2330 '.', endc); 2331 return; 2332 } 2333 *cp = '\0'; 2334 2335 /* 2336 * Substitute for any variables in the file name before trying to 2337 * find the thing. 2338 */ 2339 file = Var_Subst(file, VAR_CMD, VARE_WANTRES); 2340 2341 Parse_include_file(file, endc == '>', *line == 'd', silent); 2342 free(file); 2343 } 2344 2345 2346 /*- 2347 *--------------------------------------------------------------------- 2348 * ParseSetIncludedFile -- 2349 * Set the .INCLUDEDFROMFILE variable to the contents of .PARSEFILE 2350 * and the .INCLUDEDFROMDIR variable to the contents of .PARSEDIR 2351 * 2352 * Results: 2353 * None 2354 * 2355 * Side Effects: 2356 * The .INCLUDEDFROMFILE variable is overwritten by the contents 2357 * of .PARSEFILE and the .INCLUDEDFROMDIR variable is overwriten 2358 * by the contents of .PARSEDIR 2359 *--------------------------------------------------------------------- 2360 */ 2361 static void 2362 ParseSetIncludedFile(void) 2363 { 2364 const char *pf, *pd; 2365 char *pf_freeIt, *pd_freeIt; 2366 2367 pf = Var_Value(".PARSEFILE", VAR_GLOBAL, &pf_freeIt); 2368 Var_Set(".INCLUDEDFROMFILE", pf, VAR_GLOBAL); 2369 pd = Var_Value(".PARSEDIR", VAR_GLOBAL, &pd_freeIt); 2370 Var_Set(".INCLUDEDFROMDIR", pd, VAR_GLOBAL); 2371 2372 if (DEBUG(PARSE)) 2373 fprintf(debug_file, "%s: ${.INCLUDEDFROMDIR} = `%s' " 2374 "${.INCLUDEDFROMFILE} = `%s'\n", __func__, pd, pf); 2375 2376 bmake_free(pf_freeIt); 2377 bmake_free(pd_freeIt); 2378 } 2379 /*- 2380 *--------------------------------------------------------------------- 2381 * ParseSetParseFile -- 2382 * Set the .PARSEDIR and .PARSEFILE variables to the dirname and 2383 * basename of the given filename 2384 * 2385 * Results: 2386 * None 2387 * 2388 * Side Effects: 2389 * The .PARSEDIR and .PARSEFILE variables are overwritten by the 2390 * dirname and basename of the given filename. 2391 *--------------------------------------------------------------------- 2392 */ 2393 static void 2394 ParseSetParseFile(const char *filename) 2395 { 2396 char *slash, *dirname; 2397 const char *pd, *pf; 2398 2399 slash = strrchr(filename, '/'); 2400 if (slash == NULL) { 2401 Var_Set(".PARSEDIR", pd = curdir, VAR_GLOBAL); 2402 Var_Set(".PARSEFILE", pf = filename, VAR_GLOBAL); 2403 dirname = NULL; 2404 } else { 2405 dirname = bmake_strsedup(filename, slash); 2406 Var_Set(".PARSEDIR", pd = dirname, VAR_GLOBAL); 2407 Var_Set(".PARSEFILE", pf = slash + 1, VAR_GLOBAL); 2408 } 2409 if (DEBUG(PARSE)) 2410 fprintf(debug_file, "%s: ${.PARSEDIR} = `%s' ${.PARSEFILE} = `%s'\n", 2411 __func__, pd, pf); 2412 free(dirname); 2413 } 2414 2415 /* 2416 * Track the makefiles we read - so makefiles can 2417 * set dependencies on them. 2418 * Avoid adding anything more than once. 2419 */ 2420 2421 static void 2422 ParseTrackInput(const char *name) 2423 { 2424 char *fp = NULL; 2425 2426 const char *old = Var_Value(MAKE_MAKEFILES, VAR_GLOBAL, &fp); 2427 if (old) { 2428 size_t name_len = strlen(name); 2429 const char *ep = old + strlen(old) - name_len; 2430 /* does it contain name? */ 2431 for (; old != NULL; old = strchr(old, ' ')) { 2432 if (*old == ' ') 2433 old++; 2434 if (old >= ep) 2435 break; /* cannot contain name */ 2436 if (memcmp(old, name, name_len) == 0 2437 && (old[name_len] == 0 || old[name_len] == ' ')) 2438 goto cleanup; 2439 } 2440 } 2441 Var_Append (MAKE_MAKEFILES, name, VAR_GLOBAL); 2442 cleanup: 2443 bmake_free(fp); 2444 } 2445 2446 2447 /* Start Parsing from the given source. 2448 * 2449 * The given file is added to the includes stack. */ 2450 void 2451 Parse_SetInput(const char *name, int line, int fd, 2452 char *(*nextbuf)(void *, size_t *), void *arg) 2453 { 2454 char *buf; 2455 size_t len; 2456 2457 if (name == NULL) 2458 name = curFile->fname; 2459 else 2460 ParseTrackInput(name); 2461 2462 if (DEBUG(PARSE)) 2463 fprintf(debug_file, "%s: file %s, line %d, fd %d, nextbuf %p, arg %p\n", 2464 __func__, name, line, fd, nextbuf, arg); 2465 2466 if (fd == -1 && nextbuf == NULL) 2467 /* sanity */ 2468 return; 2469 2470 if (curFile != NULL) 2471 /* Save exiting file info */ 2472 Stack_Push(&includes, curFile); 2473 2474 /* Allocate and fill in new structure */ 2475 curFile = bmake_malloc(sizeof *curFile); 2476 2477 /* 2478 * Once the previous state has been saved, we can get down to reading 2479 * the new file. We set up the name of the file to be the absolute 2480 * name of the include file so error messages refer to the right 2481 * place. 2482 */ 2483 curFile->fname = bmake_strdup(name); 2484 curFile->lineno = line; 2485 curFile->first_lineno = line; 2486 curFile->nextbuf = nextbuf; 2487 curFile->nextbuf_arg = arg; 2488 curFile->lf = NULL; 2489 curFile->depending = doing_depend; /* restore this on EOF */ 2490 2491 assert(nextbuf != NULL); 2492 2493 /* Get first block of input data */ 2494 buf = curFile->nextbuf(curFile->nextbuf_arg, &len); 2495 if (buf == NULL) { 2496 /* Was all a waste of time ... */ 2497 if (curFile->fname) 2498 free(curFile->fname); 2499 free(curFile); 2500 return; 2501 } 2502 curFile->P_str = buf; 2503 curFile->P_ptr = buf; 2504 curFile->P_end = buf+len; 2505 2506 curFile->cond_depth = Cond_save_depth(); 2507 ParseSetParseFile(name); 2508 } 2509 2510 /*- 2511 *----------------------------------------------------------------------- 2512 * IsInclude -- 2513 * Check if the line is an include directive 2514 * 2515 * Results: 2516 * TRUE if it is. 2517 * 2518 * Side Effects: 2519 * None 2520 * 2521 *----------------------------------------------------------------------- 2522 */ 2523 static Boolean 2524 IsInclude(const char *line, Boolean sysv) 2525 { 2526 static const char inc[] = "include"; 2527 static const size_t inclen = sizeof(inc) - 1; 2528 2529 /* 'd' is not valid for sysv */ 2530 int o = strchr(sysv ? "s-" : "ds-", *line) != NULL; 2531 2532 if (strncmp(line + o, inc, inclen) != 0) 2533 return FALSE; 2534 2535 /* Space is not mandatory for BSD .include */ 2536 return !sysv || isspace((unsigned char)line[inclen + o]); 2537 } 2538 2539 2540 #ifdef SYSVINCLUDE 2541 /*- 2542 *----------------------------------------------------------------------- 2543 * IsSysVInclude -- 2544 * Check if the line is a SYSV include directive 2545 * 2546 * Results: 2547 * TRUE if it is. 2548 * 2549 * Side Effects: 2550 * None 2551 * 2552 *----------------------------------------------------------------------- 2553 */ 2554 static Boolean 2555 IsSysVInclude(const char *line) 2556 { 2557 const char *p; 2558 2559 if (!IsInclude(line, TRUE)) 2560 return FALSE; 2561 2562 /* Avoid interpeting a dependency line as an include */ 2563 for (p = line; (p = strchr(p, ':')) != NULL;) { 2564 if (*++p == '\0') { 2565 /* end of line -> dependency */ 2566 return FALSE; 2567 } 2568 if (*p == ':' || isspace((unsigned char)*p)) { 2569 /* :: operator or ': ' -> dependency */ 2570 return FALSE; 2571 } 2572 } 2573 return TRUE; 2574 } 2575 2576 /*- 2577 *--------------------------------------------------------------------- 2578 * ParseTraditionalInclude -- 2579 * Push to another file. 2580 * 2581 * The input is the current line. The file name(s) are 2582 * following the "include". 2583 * 2584 * Results: 2585 * None 2586 * 2587 * Side Effects: 2588 * A structure is added to the includes Lst and readProc, lineno, 2589 * fname and curFILE are altered for the new file 2590 *--------------------------------------------------------------------- 2591 */ 2592 static void 2593 ParseTraditionalInclude(char *line) 2594 { 2595 char *cp; /* current position in file spec */ 2596 int done = 0; 2597 int silent = line[0] != 'i'; 2598 char *file = &line[silent + 7]; 2599 char *all_files; 2600 2601 if (DEBUG(PARSE)) { 2602 fprintf(debug_file, "%s: %s\n", __func__, file); 2603 } 2604 2605 /* 2606 * Skip over whitespace 2607 */ 2608 while (isspace((unsigned char)*file)) 2609 file++; 2610 2611 /* 2612 * Substitute for any variables in the file name before trying to 2613 * find the thing. 2614 */ 2615 all_files = Var_Subst(file, VAR_CMD, VARE_WANTRES); 2616 2617 if (*file == '\0') { 2618 Parse_Error(PARSE_FATAL, 2619 "Filename missing from \"include\""); 2620 goto out; 2621 } 2622 2623 for (file = all_files; !done; file = cp + 1) { 2624 /* Skip to end of line or next whitespace */ 2625 for (cp = file; *cp && !isspace((unsigned char) *cp); cp++) 2626 continue; 2627 2628 if (*cp) 2629 *cp = '\0'; 2630 else 2631 done = 1; 2632 2633 Parse_include_file(file, FALSE, FALSE, silent); 2634 } 2635 out: 2636 free(all_files); 2637 } 2638 #endif 2639 2640 #ifdef GMAKEEXPORT 2641 /*- 2642 *--------------------------------------------------------------------- 2643 * ParseGmakeExport -- 2644 * Parse export <variable>=<value> 2645 * 2646 * And set the environment with it. 2647 * 2648 * Results: 2649 * None 2650 * 2651 * Side Effects: 2652 * None 2653 *--------------------------------------------------------------------- 2654 */ 2655 static void 2656 ParseGmakeExport(char *line) 2657 { 2658 char *variable = &line[6]; 2659 char *value; 2660 2661 if (DEBUG(PARSE)) { 2662 fprintf(debug_file, "%s: %s\n", __func__, variable); 2663 } 2664 2665 /* 2666 * Skip over whitespace 2667 */ 2668 while (isspace((unsigned char)*variable)) 2669 variable++; 2670 2671 for (value = variable; *value && *value != '='; value++) 2672 continue; 2673 2674 if (*value != '=') { 2675 Parse_Error(PARSE_FATAL, 2676 "Variable/Value missing from \"export\""); 2677 return; 2678 } 2679 *value++ = '\0'; /* terminate variable */ 2680 2681 /* 2682 * Expand the value before putting it in the environment. 2683 */ 2684 value = Var_Subst(value, VAR_CMD, VARE_WANTRES); 2685 setenv(variable, value, 1); 2686 free(value); 2687 } 2688 #endif 2689 2690 /*- 2691 *--------------------------------------------------------------------- 2692 * ParseEOF -- 2693 * Called when EOF is reached in the current file. If we were reading 2694 * an include file, the includes stack is popped and things set up 2695 * to go back to reading the previous file at the previous location. 2696 * 2697 * Results: 2698 * CONTINUE if there's more to do. DONE if not. 2699 * 2700 * Side Effects: 2701 * The old curFILE, is closed. The includes list is shortened. 2702 * lineno, curFILE, and fname are changed if CONTINUE is returned. 2703 *--------------------------------------------------------------------- 2704 */ 2705 static int 2706 ParseEOF(void) 2707 { 2708 char *ptr; 2709 size_t len; 2710 2711 assert(curFile->nextbuf != NULL); 2712 2713 doing_depend = curFile->depending; /* restore this */ 2714 /* get next input buffer, if any */ 2715 ptr = curFile->nextbuf(curFile->nextbuf_arg, &len); 2716 curFile->P_ptr = ptr; 2717 curFile->P_str = ptr; 2718 curFile->P_end = ptr + len; 2719 curFile->lineno = curFile->first_lineno; 2720 if (ptr != NULL) { 2721 /* Iterate again */ 2722 return CONTINUE; 2723 } 2724 2725 /* Ensure the makefile (or loop) didn't have mismatched conditionals */ 2726 Cond_restore_depth(curFile->cond_depth); 2727 2728 if (curFile->lf != NULL) { 2729 loadedfile_destroy(curFile->lf); 2730 curFile->lf = NULL; 2731 } 2732 2733 /* Dispose of curFile info */ 2734 /* Leak curFile->fname because all the gnodes have pointers to it */ 2735 free(curFile->P_str); 2736 free(curFile); 2737 2738 if (Stack_IsEmpty(&includes)) { 2739 curFile = NULL; 2740 /* We've run out of input */ 2741 Var_Delete(".PARSEDIR", VAR_GLOBAL); 2742 Var_Delete(".PARSEFILE", VAR_GLOBAL); 2743 Var_Delete(".INCLUDEDFROMDIR", VAR_GLOBAL); 2744 Var_Delete(".INCLUDEDFROMFILE", VAR_GLOBAL); 2745 return DONE; 2746 } 2747 2748 curFile = Stack_Pop(&includes); 2749 if (DEBUG(PARSE)) 2750 fprintf(debug_file, "ParseEOF: returning to file %s, line %d\n", 2751 curFile->fname, curFile->lineno); 2752 2753 /* Restore the PARSEDIR/PARSEFILE variables */ 2754 ParseSetParseFile(curFile->fname); 2755 return CONTINUE; 2756 } 2757 2758 #define PARSE_RAW 1 2759 #define PARSE_SKIP 2 2760 2761 static char * 2762 ParseGetLine(int flags, int *length) 2763 { 2764 IFile *cf = curFile; 2765 char *ptr; 2766 char ch; 2767 char *line; 2768 char *line_end; 2769 char *escaped; 2770 char *comment; 2771 char *tp; 2772 2773 /* Loop through blank lines and comment lines */ 2774 for (;;) { 2775 cf->lineno++; 2776 line = cf->P_ptr; 2777 ptr = line; 2778 line_end = line; 2779 escaped = NULL; 2780 comment = NULL; 2781 for (;;) { 2782 if (cf->P_end != NULL && ptr == cf->P_end) { 2783 /* end of buffer */ 2784 ch = 0; 2785 break; 2786 } 2787 ch = *ptr; 2788 if (ch == 0 || (ch == '\\' && ptr[1] == 0)) { 2789 if (cf->P_end == NULL) 2790 /* End of string (aka for loop) data */ 2791 break; 2792 /* see if there is more we can parse */ 2793 while (ptr++ < cf->P_end) { 2794 if ((ch = *ptr) == '\n') { 2795 if (ptr > line && ptr[-1] == '\\') 2796 continue; 2797 Parse_Error(PARSE_WARNING, 2798 "Zero byte read from file, skipping rest of line."); 2799 break; 2800 } 2801 } 2802 if (cf->nextbuf != NULL) { 2803 /* 2804 * End of this buffer; return EOF and outer logic 2805 * will get the next one. (eww) 2806 */ 2807 break; 2808 } 2809 Parse_Error(PARSE_FATAL, "Zero byte read from file"); 2810 return NULL; 2811 } 2812 2813 if (ch == '\\') { 2814 /* Don't treat next character as special, remember first one */ 2815 if (escaped == NULL) 2816 escaped = ptr; 2817 if (ptr[1] == '\n') 2818 cf->lineno++; 2819 ptr += 2; 2820 line_end = ptr; 2821 continue; 2822 } 2823 if (ch == '#' && comment == NULL) { 2824 /* Remember first '#' for comment stripping */ 2825 /* Unless previous char was '[', as in modifier :[#] */ 2826 if (!(ptr > line && ptr[-1] == '[')) 2827 comment = line_end; 2828 } 2829 ptr++; 2830 if (ch == '\n') 2831 break; 2832 if (!isspace((unsigned char)ch)) 2833 /* We are not interested in trailing whitespace */ 2834 line_end = ptr; 2835 } 2836 2837 /* Save next 'to be processed' location */ 2838 cf->P_ptr = ptr; 2839 2840 /* Check we have a non-comment, non-blank line */ 2841 if (line_end == line || comment == line) { 2842 if (ch == 0) 2843 /* At end of file */ 2844 return NULL; 2845 /* Parse another line */ 2846 continue; 2847 } 2848 2849 /* We now have a line of data */ 2850 *line_end = 0; 2851 2852 if (flags & PARSE_RAW) { 2853 /* Leave '\' (etc) in line buffer (eg 'for' lines) */ 2854 *length = line_end - line; 2855 return line; 2856 } 2857 2858 if (flags & PARSE_SKIP) { 2859 /* Completely ignore non-directives */ 2860 if (line[0] != '.') 2861 continue; 2862 /* We could do more of the .else/.elif/.endif checks here */ 2863 } 2864 break; 2865 } 2866 2867 /* Brutally ignore anything after a non-escaped '#' in non-commands */ 2868 if (comment != NULL && line[0] != '\t') { 2869 line_end = comment; 2870 *line_end = 0; 2871 } 2872 2873 /* If we didn't see a '\\' then the in-situ data is fine */ 2874 if (escaped == NULL) { 2875 *length = line_end - line; 2876 return line; 2877 } 2878 2879 /* Remove escapes from '\n' and '#' */ 2880 tp = ptr = escaped; 2881 escaped = line; 2882 for (; ; *tp++ = ch) { 2883 ch = *ptr++; 2884 if (ch != '\\') { 2885 if (ch == 0) 2886 break; 2887 continue; 2888 } 2889 2890 ch = *ptr++; 2891 if (ch == 0) { 2892 /* Delete '\\' at end of buffer */ 2893 tp--; 2894 break; 2895 } 2896 2897 if (ch == '#' && line[0] != '\t') 2898 /* Delete '\\' from before '#' on non-command lines */ 2899 continue; 2900 2901 if (ch != '\n') { 2902 /* Leave '\\' in buffer for later */ 2903 *tp++ = '\\'; 2904 /* Make sure we don't delete an escaped ' ' from the line end */ 2905 escaped = tp + 1; 2906 continue; 2907 } 2908 2909 /* Escaped '\n' replace following whitespace with a single ' ' */ 2910 while (ptr[0] == ' ' || ptr[0] == '\t') 2911 ptr++; 2912 ch = ' '; 2913 } 2914 2915 /* Delete any trailing spaces - eg from empty continuations */ 2916 while (tp > escaped && isspace((unsigned char)tp[-1])) 2917 tp--; 2918 2919 *tp = 0; 2920 *length = tp - line; 2921 return line; 2922 } 2923 2924 /*- 2925 *--------------------------------------------------------------------- 2926 * ParseReadLine -- 2927 * Read an entire line from the input file. Called only by Parse_File. 2928 * 2929 * Results: 2930 * A line w/o its newline 2931 * 2932 * Side Effects: 2933 * Only those associated with reading a character 2934 *--------------------------------------------------------------------- 2935 */ 2936 static char * 2937 ParseReadLine(void) 2938 { 2939 char *line; /* Result */ 2940 int lineLength; /* Length of result */ 2941 int lineno; /* Saved line # */ 2942 int rval; 2943 2944 for (;;) { 2945 line = ParseGetLine(0, &lineLength); 2946 if (line == NULL) 2947 return NULL; 2948 2949 if (line[0] != '.') 2950 return line; 2951 2952 /* 2953 * The line might be a conditional. Ask the conditional module 2954 * about it and act accordingly 2955 */ 2956 switch (Cond_Eval(line)) { 2957 case COND_SKIP: 2958 /* Skip to next conditional that evaluates to COND_PARSE. */ 2959 do { 2960 line = ParseGetLine(PARSE_SKIP, &lineLength); 2961 } while (line && Cond_Eval(line) != COND_PARSE); 2962 if (line == NULL) 2963 break; 2964 continue; 2965 case COND_PARSE: 2966 continue; 2967 case COND_INVALID: /* Not a conditional line */ 2968 /* Check for .for loops */ 2969 rval = For_Eval(line); 2970 if (rval == 0) 2971 /* Not a .for line */ 2972 break; 2973 if (rval < 0) 2974 /* Syntax error - error printed, ignore line */ 2975 continue; 2976 /* Start of a .for loop */ 2977 lineno = curFile->lineno; 2978 /* Accumulate loop lines until matching .endfor */ 2979 do { 2980 line = ParseGetLine(PARSE_RAW, &lineLength); 2981 if (line == NULL) { 2982 Parse_Error(PARSE_FATAL, 2983 "Unexpected end of file in for loop."); 2984 break; 2985 } 2986 } while (For_Accum(line)); 2987 /* Stash each iteration as a new 'input file' */ 2988 For_Run(lineno); 2989 /* Read next line from for-loop buffer */ 2990 continue; 2991 } 2992 return line; 2993 } 2994 } 2995 2996 /*- 2997 *----------------------------------------------------------------------- 2998 * ParseFinishLine -- 2999 * Handle the end of a dependency group. 3000 * 3001 * Results: 3002 * Nothing. 3003 * 3004 * Side Effects: 3005 * inLine set FALSE. 'targets' list destroyed. 3006 * 3007 *----------------------------------------------------------------------- 3008 */ 3009 static void 3010 ParseFinishLine(void) 3011 { 3012 if (inLine) { 3013 if (targets != NULL) { 3014 Lst_ForEach(targets, Suff_EndTransform, NULL); 3015 Lst_Destroy(targets, ParseHasCommands); 3016 } 3017 targets = NULL; 3018 inLine = FALSE; 3019 } 3020 } 3021 3022 3023 /*- 3024 *--------------------------------------------------------------------- 3025 * Parse_File -- 3026 * Parse a file into its component parts, incorporating it into the 3027 * current dependency graph. This is the main function and controls 3028 * almost every other function in this module 3029 * 3030 * Input: 3031 * name the name of the file being read 3032 * fd Open file to makefile to parse 3033 * 3034 * Results: 3035 * None 3036 * 3037 * Side Effects: 3038 * closes fd. 3039 * Loads. Nodes are added to the list of all targets, nodes and links 3040 * are added to the dependency graph. etc. etc. etc. 3041 *--------------------------------------------------------------------- 3042 */ 3043 void 3044 Parse_File(const char *name, int fd) 3045 { 3046 char *cp; /* pointer into the line */ 3047 char *line; /* the line we're working on */ 3048 struct loadedfile *lf; 3049 3050 lf = loadfile(name, fd); 3051 3052 inLine = FALSE; 3053 fatals = 0; 3054 3055 if (name == NULL) 3056 name = "(stdin)"; 3057 3058 Parse_SetInput(name, 0, -1, loadedfile_nextbuf, lf); 3059 curFile->lf = lf; 3060 3061 do { 3062 for (; (line = ParseReadLine()) != NULL; ) { 3063 if (DEBUG(PARSE)) 3064 fprintf(debug_file, "ParseReadLine (%d): '%s'\n", 3065 curFile->lineno, line); 3066 if (*line == '.') { 3067 /* 3068 * Lines that begin with the special character may be 3069 * include or undef directives. 3070 * On the other hand they can be suffix rules (.c.o: ...) 3071 * or just dependencies for filenames that start '.'. 3072 */ 3073 for (cp = line + 1; isspace((unsigned char)*cp); cp++) { 3074 continue; 3075 } 3076 if (IsInclude(cp, FALSE)) { 3077 ParseDoInclude(cp); 3078 continue; 3079 } 3080 if (strncmp(cp, "undef", 5) == 0) { 3081 char *cp2; 3082 for (cp += 5; isspace((unsigned char) *cp); cp++) 3083 continue; 3084 for (cp2 = cp; !isspace((unsigned char) *cp2) && 3085 *cp2 != '\0'; cp2++) 3086 continue; 3087 *cp2 = '\0'; 3088 Var_Delete(cp, VAR_GLOBAL); 3089 continue; 3090 } else if (strncmp(cp, "export", 6) == 0) { 3091 for (cp += 6; isspace((unsigned char) *cp); cp++) 3092 continue; 3093 Var_Export(cp, TRUE); 3094 continue; 3095 } else if (strncmp(cp, "unexport", 8) == 0) { 3096 Var_UnExport(cp); 3097 continue; 3098 } else if (strncmp(cp, "info", 4) == 0 || 3099 strncmp(cp, "error", 5) == 0 || 3100 strncmp(cp, "warning", 7) == 0) { 3101 if (ParseMessage(cp)) 3102 continue; 3103 } 3104 } 3105 3106 if (*line == '\t') { 3107 /* 3108 * If a line starts with a tab, it can only hope to be 3109 * a creation command. 3110 */ 3111 cp = line + 1; 3112 shellCommand: 3113 for (; isspace ((unsigned char)*cp); cp++) { 3114 continue; 3115 } 3116 if (*cp) { 3117 if (!inLine) 3118 Parse_Error(PARSE_FATAL, 3119 "Unassociated shell command \"%s\"", 3120 cp); 3121 /* 3122 * So long as it's not a blank line and we're actually 3123 * in a dependency spec, add the command to the list of 3124 * commands of all targets in the dependency spec 3125 */ 3126 if (targets) { 3127 cp = bmake_strdup(cp); 3128 Lst_ForEach(targets, ParseAddCmd, cp); 3129 #ifdef CLEANUP 3130 Lst_Append(targCmds, cp); 3131 #endif 3132 } 3133 } 3134 continue; 3135 } 3136 3137 #ifdef SYSVINCLUDE 3138 if (IsSysVInclude(line)) { 3139 /* 3140 * It's an S3/S5-style "include". 3141 */ 3142 ParseTraditionalInclude(line); 3143 continue; 3144 } 3145 #endif 3146 #ifdef GMAKEEXPORT 3147 if (strncmp(line, "export", 6) == 0 && 3148 isspace((unsigned char) line[6]) && 3149 strchr(line, ':') == NULL) { 3150 /* 3151 * It's a Gmake "export". 3152 */ 3153 ParseGmakeExport(line); 3154 continue; 3155 } 3156 #endif 3157 if (Parse_IsVar(line)) { 3158 ParseFinishLine(); 3159 Parse_DoVar(line, VAR_GLOBAL); 3160 continue; 3161 } 3162 3163 #ifndef POSIX 3164 /* 3165 * To make life easier on novices, if the line is indented we 3166 * first make sure the line has a dependency operator in it. 3167 * If it doesn't have an operator and we're in a dependency 3168 * line's script, we assume it's actually a shell command 3169 * and add it to the current list of targets. 3170 */ 3171 cp = line; 3172 if (isspace((unsigned char) line[0])) { 3173 while (isspace((unsigned char) *cp)) 3174 cp++; 3175 while (*cp && (ParseIsEscaped(line, cp) || 3176 *cp != ':' && *cp != '!')) { 3177 cp++; 3178 } 3179 if (*cp == '\0') { 3180 if (inLine) { 3181 Parse_Error(PARSE_WARNING, 3182 "Shell command needs a leading tab"); 3183 goto shellCommand; 3184 } 3185 } 3186 } 3187 #endif 3188 ParseFinishLine(); 3189 3190 /* 3191 * For some reason - probably to make the parser impossible - 3192 * a ';' can be used to separate commands from dependencies. 3193 * Attempt to avoid ';' inside substitution patterns. 3194 */ 3195 { 3196 int level = 0; 3197 3198 for (cp = line; *cp != 0; cp++) { 3199 if (*cp == '\\' && cp[1] != 0) { 3200 cp++; 3201 continue; 3202 } 3203 if (*cp == '$' && 3204 (cp[1] == '(' || cp[1] == '{')) { 3205 level++; 3206 continue; 3207 } 3208 if (level > 0) { 3209 if (*cp == ')' || *cp == '}') { 3210 level--; 3211 continue; 3212 } 3213 } else if (*cp == ';') { 3214 break; 3215 } 3216 } 3217 } 3218 if (*cp != 0) 3219 /* Terminate the dependency list at the ';' */ 3220 *cp++ = 0; 3221 else 3222 cp = NULL; 3223 3224 /* 3225 * We now know it's a dependency line so it needs to have all 3226 * variables expanded before being parsed. Tell the variable 3227 * module to complain if some variable is undefined... 3228 */ 3229 line = Var_Subst(line, VAR_CMD, VARE_UNDEFERR|VARE_WANTRES); 3230 3231 /* 3232 * Need a non-circular list for the target nodes 3233 */ 3234 if (targets != NULL) 3235 Lst_Free(targets); 3236 3237 targets = Lst_Init(); 3238 inLine = TRUE; 3239 3240 ParseDoDependency(line); 3241 free(line); 3242 3243 /* If there were commands after a ';', add them now */ 3244 if (cp != NULL) { 3245 goto shellCommand; 3246 } 3247 } 3248 /* 3249 * Reached EOF, but it may be just EOF of an include file... 3250 */ 3251 } while (ParseEOF() == CONTINUE); 3252 3253 if (fatals) { 3254 (void)fflush(stdout); 3255 (void)fprintf(stderr, 3256 "%s: Fatal errors encountered -- cannot continue", 3257 progname); 3258 PrintOnError(NULL, NULL); 3259 exit(1); 3260 } 3261 } 3262 3263 /*- 3264 *--------------------------------------------------------------------- 3265 * Parse_Init -- 3266 * initialize the parsing module 3267 * 3268 * Results: 3269 * none 3270 * 3271 * Side Effects: 3272 * the parseIncPath list is initialized... 3273 *--------------------------------------------------------------------- 3274 */ 3275 void 3276 Parse_Init(void) 3277 { 3278 mainNode = NULL; 3279 parseIncPath = Lst_Init(); 3280 sysIncPath = Lst_Init(); 3281 defIncPath = Lst_Init(); 3282 Stack_Init(&includes); 3283 #ifdef CLEANUP 3284 targCmds = Lst_Init(); 3285 #endif 3286 } 3287 3288 void 3289 Parse_End(void) 3290 { 3291 #ifdef CLEANUP 3292 Lst_Destroy(targCmds, free); 3293 if (targets) 3294 Lst_Free(targets); 3295 Lst_Destroy(defIncPath, Dir_Destroy); 3296 Lst_Destroy(sysIncPath, Dir_Destroy); 3297 Lst_Destroy(parseIncPath, Dir_Destroy); 3298 assert(Stack_IsEmpty(&includes)); 3299 Stack_Done(&includes); 3300 #endif 3301 } 3302 3303 3304 /*- 3305 *----------------------------------------------------------------------- 3306 * Parse_MainName -- 3307 * Return a Lst of the main target to create for main()'s sake. If 3308 * no such target exists, we Punt with an obnoxious error message. 3309 * 3310 * Results: 3311 * A Lst of the single node to create. 3312 * 3313 * Side Effects: 3314 * None. 3315 * 3316 *----------------------------------------------------------------------- 3317 */ 3318 Lst 3319 Parse_MainName(void) 3320 { 3321 Lst mainList; /* result list */ 3322 3323 mainList = Lst_Init(); 3324 3325 if (mainNode == NULL) { 3326 Punt("no target to make."); 3327 /*NOTREACHED*/ 3328 } else if (mainNode->type & OP_DOUBLEDEP) { 3329 Lst_Append(mainList, mainNode); 3330 Lst_AppendAll(mainList, mainNode->cohorts); 3331 } 3332 else 3333 Lst_Append(mainList, mainNode); 3334 Var_Append(".TARGETS", mainNode->name, VAR_GLOBAL); 3335 return mainList; 3336 } 3337 3338 /*- 3339 *----------------------------------------------------------------------- 3340 * ParseMark -- 3341 * Add the filename and lineno to the GNode so that we remember 3342 * where it was first defined. 3343 * 3344 * Side Effects: 3345 * None. 3346 * 3347 *----------------------------------------------------------------------- 3348 */ 3349 static void 3350 ParseMark(GNode *gn) 3351 { 3352 gn->fname = curFile->fname; 3353 gn->lineno = curFile->lineno; 3354 } 3355
Indexes created Sun Sep 21 20:09:37 GMT 2025