1 /* $NetBSD: parse.c,v 1.236 2020/07/03 08:13:23 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 1.236 2020/07/03 08:13:23 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 1.236 2020/07/03 08:13:23 rillig Exp $"); 80 #endif 81 #endif /* not lint */ 82 #endif 83 84 /*- 85 * parse.c -- 86 * Functions to parse a makefile. 87 * 88 * One function, Parse_Init, must be called before any functions 89 * in this module are used. After that, the function Parse_File is the 90 * main entry point and controls most of the other functions in this 91 * module. 92 * 93 * Most important structures are kept in Lsts. Directories for 94 * the .include "..." function are kept in the 'parseIncPath' Lst, while 95 * those for the .include <...> are kept in the 'sysIncPath' Lst. The 96 * targets currently being defined are kept in the 'targets' Lst. 97 * 98 * The variables 'fname' and 'lineno' are used to track the name 99 * of the current file and the line number in that file so that error 100 * messages can be more meaningful. 101 * 102 * Interface: 103 * Parse_Init Initialization function which must be 104 * called before anything else in this module 105 * is used. 106 * 107 * Parse_End Cleanup the module 108 * 109 * Parse_File Function used to parse a makefile. It must 110 * be given the name of the file, which should 111 * already have been opened, and a function 112 * to call to read a character from the file. 113 * 114 * Parse_IsVar Returns TRUE if the given line is a 115 * variable assignment. Used by MainParseArgs 116 * to determine if an argument is a target 117 * or a variable assignment. Used internally 118 * for pretty much the same thing... 119 * 120 * Parse_Error Function called when an error occurs in 121 * parsing. Used by the variable and 122 * conditional modules. 123 * Parse_MainName Returns a Lst of the main target to create. 124 */ 125 126 #include <sys/types.h> 127 #include <sys/stat.h> 128 #include <assert.h> 129 #include <ctype.h> 130 #include <errno.h> 131 #include <stdarg.h> 132 #include <stdio.h> 133 134 #include "make.h" 135 #include "hash.h" 136 #include "dir.h" 137 #include "job.h" 138 #include "buf.h" 139 #include "pathnames.h" 140 141 #ifdef HAVE_STDINT_H 142 #include <stdint.h> 143 #endif 144 145 #ifdef HAVE_MMAP 146 #include <sys/mman.h> 147 148 #ifndef MAP_COPY 149 #define MAP_COPY MAP_PRIVATE 150 #endif 151 #ifndef MAP_FILE 152 #define MAP_FILE 0 153 #endif 154 #endif 155 156 //////////////////////////////////////////////////////////// 157 // types and constants 158 159 /* 160 * Structure for a file being read ("included file") 161 */ 162 typedef struct IFile { 163 char *fname; /* name of file */ 164 int lineno; /* current line number in file */ 165 int first_lineno; /* line number of start of text */ 166 int cond_depth; /* 'if' nesting when file opened */ 167 Boolean depending; /* state of doing_depend on EOF */ 168 char *P_str; /* point to base of string buffer */ 169 char *P_ptr; /* point to next char of string buffer */ 170 char *P_end; /* point to the end of string buffer */ 171 char *(*nextbuf)(void *, size_t *); /* Function to get more data */ 172 void *nextbuf_arg; /* Opaque arg for nextbuf() */ 173 struct loadedfile *lf; /* loadedfile object, if any */ 174 } IFile; 175 176 177 /* 178 * These values are returned by ParseEOF to tell Parse_File whether to 179 * CONTINUE parsing, i.e. it had only reached the end of an include file, 180 * or if it's DONE. 181 */ 182 #define CONTINUE 1 183 #define DONE 0 184 185 /* 186 * Tokens for target attributes 187 */ 188 typedef enum { 189 Begin, /* .BEGIN */ 190 Default, /* .DEFAULT */ 191 DeleteOnError, /* .DELETE_ON_ERROR */ 192 End, /* .END */ 193 dotError, /* .ERROR */ 194 Ignore, /* .IGNORE */ 195 Includes, /* .INCLUDES */ 196 Interrupt, /* .INTERRUPT */ 197 Libs, /* .LIBS */ 198 Meta, /* .META */ 199 MFlags, /* .MFLAGS or .MAKEFLAGS */ 200 Main, /* .MAIN and we don't have anything user-specified to 201 * make */ 202 NoExport, /* .NOEXPORT */ 203 NoMeta, /* .NOMETA */ 204 NoMetaCmp, /* .NOMETA_CMP */ 205 NoPath, /* .NOPATH */ 206 Not, /* Not special */ 207 NotParallel, /* .NOTPARALLEL */ 208 Null, /* .NULL */ 209 ExObjdir, /* .OBJDIR */ 210 Order, /* .ORDER */ 211 Parallel, /* .PARALLEL */ 212 ExPath, /* .PATH */ 213 Phony, /* .PHONY */ 214 #ifdef POSIX 215 Posix, /* .POSIX */ 216 #endif 217 Precious, /* .PRECIOUS */ 218 ExShell, /* .SHELL */ 219 Silent, /* .SILENT */ 220 SingleShell, /* .SINGLESHELL */ 221 Stale, /* .STALE */ 222 Suffixes, /* .SUFFIXES */ 223 Wait, /* .WAIT */ 224 Attribute /* Generic attribute */ 225 } ParseSpecial; 226 227 /* 228 * Other tokens 229 */ 230 #define LPAREN '(' 231 #define RPAREN ')' 232 233 234 //////////////////////////////////////////////////////////// 235 // result data 236 237 /* 238 * The main target to create. This is the first target on the first 239 * dependency line in the first makefile. 240 */ 241 static GNode *mainNode; 242 243 //////////////////////////////////////////////////////////// 244 // eval state 245 246 /* targets we're working on */ 247 static Lst targets; 248 249 #ifdef CLEANUP 250 /* command lines for targets */ 251 static Lst targCmds; 252 #endif 253 254 /* 255 * specType contains the SPECial TYPE of the current target. It is 256 * Not if the target is unspecial. If it *is* special, however, the children 257 * are linked as children of the parent but not vice versa. This variable is 258 * set in ParseDoDependency 259 */ 260 static ParseSpecial specType; 261 262 /* 263 * Predecessor node for handling .ORDER. Initialized to NULL when .ORDER 264 * seen, then set to each successive source on the line. 265 */ 266 static GNode *predecessor; 267 268 //////////////////////////////////////////////////////////// 269 // parser state 270 271 /* true if currently in a dependency line or its commands */ 272 static Boolean inLine; 273 274 /* number of fatal errors */ 275 static int fatals = 0; 276 277 /* 278 * Variables for doing includes 279 */ 280 281 /* current file being read */ 282 static IFile *curFile; 283 284 /* stack of IFiles generated by .includes */ 285 static Lst includes; 286 287 /* include paths (lists of directories) */ 288 Lst parseIncPath; /* dirs for "..." includes */ 289 Lst sysIncPath; /* dirs for <...> includes */ 290 Lst defIncPath; /* default for sysIncPath */ 291 292 //////////////////////////////////////////////////////////// 293 // parser tables 294 295 /* 296 * The parseKeywords table is searched using binary search when deciding 297 * if a target or source is special. The 'spec' field is the ParseSpecial 298 * type of the keyword ("Not" if the keyword isn't special as a target) while 299 * the 'op' field is the operator to apply to the list of targets if the 300 * keyword is used as a source ("0" if the keyword isn't special as a source) 301 */ 302 static const struct { 303 const char *name; /* Name of keyword */ 304 ParseSpecial spec; /* Type when used as a target */ 305 int op; /* Operator when used as a source */ 306 } parseKeywords[] = { 307 { ".BEGIN", Begin, 0 }, 308 { ".DEFAULT", Default, 0 }, 309 { ".DELETE_ON_ERROR", DeleteOnError, 0 }, 310 { ".END", End, 0 }, 311 { ".ERROR", dotError, 0 }, 312 { ".EXEC", Attribute, OP_EXEC }, 313 { ".IGNORE", Ignore, OP_IGNORE }, 314 { ".INCLUDES", Includes, 0 }, 315 { ".INTERRUPT", Interrupt, 0 }, 316 { ".INVISIBLE", Attribute, OP_INVISIBLE }, 317 { ".JOIN", Attribute, OP_JOIN }, 318 { ".LIBS", Libs, 0 }, 319 { ".MADE", Attribute, OP_MADE }, 320 { ".MAIN", Main, 0 }, 321 { ".MAKE", Attribute, OP_MAKE }, 322 { ".MAKEFLAGS", MFlags, 0 }, 323 { ".META", Meta, OP_META }, 324 { ".MFLAGS", MFlags, 0 }, 325 { ".NOMETA", NoMeta, OP_NOMETA }, 326 { ".NOMETA_CMP", NoMetaCmp, OP_NOMETA_CMP }, 327 { ".NOPATH", NoPath, OP_NOPATH }, 328 { ".NOTMAIN", Attribute, OP_NOTMAIN }, 329 { ".NOTPARALLEL", NotParallel, 0 }, 330 { ".NO_PARALLEL", NotParallel, 0 }, 331 { ".NULL", Null, 0 }, 332 { ".OBJDIR", ExObjdir, 0 }, 333 { ".OPTIONAL", Attribute, OP_OPTIONAL }, 334 { ".ORDER", Order, 0 }, 335 { ".PARALLEL", Parallel, 0 }, 336 { ".PATH", ExPath, 0 }, 337 { ".PHONY", Phony, OP_PHONY }, 338 #ifdef POSIX 339 { ".POSIX", Posix, 0 }, 340 #endif 341 { ".PRECIOUS", Precious, OP_PRECIOUS }, 342 { ".RECURSIVE", Attribute, OP_MAKE }, 343 { ".SHELL", ExShell, 0 }, 344 { ".SILENT", Silent, OP_SILENT }, 345 { ".SINGLESHELL", SingleShell, 0 }, 346 { ".STALE", Stale, 0 }, 347 { ".SUFFIXES", Suffixes, 0 }, 348 { ".USE", Attribute, OP_USE }, 349 { ".USEBEFORE", Attribute, OP_USEBEFORE }, 350 { ".WAIT", Wait, 0 }, 351 }; 352 353 //////////////////////////////////////////////////////////// 354 // local functions 355 356 static int ParseIsEscaped(const char *, const char *); 357 static void ParseErrorInternal(const char *, size_t, int, const char *, ...) 358 MAKE_ATTR_PRINTFLIKE(4,5); 359 static void ParseVErrorInternal(FILE *, const char *, size_t, int, const char *, va_list) 360 MAKE_ATTR_PRINTFLIKE(5, 0); 361 static int ParseFindKeyword(const char *); 362 static int ParseLinkSrc(void *, void *); 363 static int ParseDoOp(void *, void *); 364 static void ParseDoSrc(int, const char *); 365 static int ParseFindMain(void *, void *); 366 static int ParseAddDir(void *, void *); 367 static int ParseClearPath(void *, void *); 368 static void ParseDoDependency(char *); 369 static int ParseAddCmd(void *, void *); 370 static void ParseHasCommands(void *); 371 static void ParseDoInclude(char *); 372 static void ParseSetParseFile(const char *); 373 static void ParseSetIncludedFile(void); 374 #ifdef GMAKEEXPORT 375 static void ParseGmakeExport(char *); 376 #endif 377 static int ParseEOF(void); 378 static char *ParseReadLine(void); 379 static void ParseFinishLine(void); 380 static void ParseMark(GNode *); 381 382 //////////////////////////////////////////////////////////// 383 // file loader 384 385 struct loadedfile { 386 const char *path; /* name, for error reports */ 387 char *buf; /* contents buffer */ 388 size_t len; /* length of contents */ 389 size_t maplen; /* length of mmap area, or 0 */ 390 Boolean used; /* XXX: have we used the data yet */ 391 }; 392 393 /* 394 * Constructor/destructor for loadedfile 395 */ 396 static struct loadedfile * 397 loadedfile_create(const char *path) 398 { 399 struct loadedfile *lf; 400 401 lf = bmake_malloc(sizeof(*lf)); 402 lf->path = (path == NULL ? "(stdin)" : path); 403 lf->buf = NULL; 404 lf->len = 0; 405 lf->maplen = 0; 406 lf->used = FALSE; 407 return lf; 408 } 409 410 static void 411 loadedfile_destroy(struct loadedfile *lf) 412 { 413 if (lf->buf != NULL) { 414 if (lf->maplen > 0) { 415 #ifdef HAVE_MMAP 416 munmap(lf->buf, lf->maplen); 417 #endif 418 } else { 419 free(lf->buf); 420 } 421 } 422 free(lf); 423 } 424 425 /* 426 * nextbuf() operation for loadedfile, as needed by the weird and twisted 427 * logic below. Once that's cleaned up, we can get rid of lf->used... 428 */ 429 static char * 430 loadedfile_nextbuf(void *x, size_t *len) 431 { 432 struct loadedfile *lf = x; 433 434 if (lf->used) { 435 return NULL; 436 } 437 lf->used = TRUE; 438 *len = lf->len; 439 return lf->buf; 440 } 441 442 /* 443 * Try to get the size of a file. 444 */ 445 static ReturnStatus 446 load_getsize(int fd, size_t *ret) 447 { 448 struct stat st; 449 450 if (fstat(fd, &st) < 0) { 451 return FAILURE; 452 } 453 454 if (!S_ISREG(st.st_mode)) { 455 return FAILURE; 456 } 457 458 /* 459 * st_size is an off_t, which is 64 bits signed; *ret is 460 * size_t, which might be 32 bits unsigned or 64 bits 461 * unsigned. Rather than being elaborate, just punt on 462 * files that are more than 2^31 bytes. We should never 463 * see a makefile that size in practice... 464 * 465 * While we're at it reject negative sizes too, just in case. 466 */ 467 if (st.st_size < 0 || st.st_size > 0x7fffffff) { 468 return FAILURE; 469 } 470 471 *ret = (size_t) st.st_size; 472 return SUCCESS; 473 } 474 475 /* 476 * Read in a file. 477 * 478 * Until the path search logic can be moved under here instead of 479 * being in the caller in another source file, we need to have the fd 480 * passed in already open. Bleh. 481 * 482 * If the path is NULL use stdin and (to insure against fd leaks) 483 * assert that the caller passed in -1. 484 */ 485 static struct loadedfile * 486 loadfile(const char *path, int fd) 487 { 488 struct loadedfile *lf; 489 #ifdef HAVE_MMAP 490 static long pagesize = 0; 491 #endif 492 ssize_t result; 493 size_t bufpos; 494 495 lf = loadedfile_create(path); 496 497 if (path == NULL) { 498 assert(fd == -1); 499 fd = STDIN_FILENO; 500 } else { 501 #if 0 /* notyet */ 502 fd = open(path, O_RDONLY); 503 if (fd < 0) { 504 ... 505 Error("%s: %s", path, strerror(errno)); 506 exit(1); 507 } 508 #endif 509 } 510 511 #ifdef HAVE_MMAP 512 if (load_getsize(fd, &lf->len) == SUCCESS) { 513 /* found a size, try mmap */ 514 #ifdef _SC_PAGESIZE 515 if (pagesize == 0) 516 pagesize = sysconf(_SC_PAGESIZE); 517 #endif 518 if (pagesize <= 0) { 519 pagesize = 0x1000; 520 } 521 /* round size up to a page */ 522 lf->maplen = pagesize * ((lf->len + pagesize - 1)/pagesize); 523 524 /* 525 * XXX hack for dealing with empty files; remove when 526 * we're no longer limited by interfacing to the old 527 * logic elsewhere in this file. 528 */ 529 if (lf->maplen == 0) { 530 lf->maplen = pagesize; 531 } 532 533 /* 534 * FUTURE: remove PROT_WRITE when the parser no longer 535 * needs to scribble on the input. 536 */ 537 lf->buf = mmap(NULL, lf->maplen, PROT_READ|PROT_WRITE, 538 MAP_FILE|MAP_COPY, fd, 0); 539 if (lf->buf != MAP_FAILED) { 540 /* succeeded */ 541 if (lf->len == lf->maplen && lf->buf[lf->len - 1] != '\n') { 542 char *b = bmake_malloc(lf->len + 1); 543 b[lf->len] = '\n'; 544 memcpy(b, lf->buf, lf->len++); 545 munmap(lf->buf, lf->maplen); 546 lf->maplen = 0; 547 lf->buf = b; 548 } 549 goto done; 550 } 551 } 552 #endif 553 /* cannot mmap; load the traditional way */ 554 555 lf->maplen = 0; 556 lf->len = 1024; 557 lf->buf = bmake_malloc(lf->len); 558 559 bufpos = 0; 560 while (1) { 561 assert(bufpos <= lf->len); 562 if (bufpos == lf->len) { 563 if (lf->len > SIZE_MAX/2) { 564 errno = EFBIG; 565 Error("%s: file too large", path); 566 exit(1); 567 } 568 lf->len *= 2; 569 lf->buf = bmake_realloc(lf->buf, lf->len); 570 } 571 assert(bufpos < lf->len); 572 result = read(fd, lf->buf + bufpos, lf->len - bufpos); 573 if (result < 0) { 574 Error("%s: read error: %s", path, strerror(errno)); 575 exit(1); 576 } 577 if (result == 0) { 578 break; 579 } 580 bufpos += result; 581 } 582 assert(bufpos <= lf->len); 583 lf->len = bufpos; 584 585 /* truncate malloc region to actual length (maybe not useful) */ 586 if (lf->len > 0) { 587 /* as for mmap case, ensure trailing \n */ 588 if (lf->buf[lf->len - 1] != '\n') 589 lf->len++; 590 lf->buf = bmake_realloc(lf->buf, lf->len); 591 lf->buf[lf->len - 1] = '\n'; 592 } 593 594 #ifdef HAVE_MMAP 595 done: 596 #endif 597 if (path != NULL) { 598 close(fd); 599 } 600 return lf; 601 } 602 603 //////////////////////////////////////////////////////////// 604 // old code 605 606 /*- 607 *---------------------------------------------------------------------- 608 * ParseIsEscaped -- 609 * Check if the current character is escaped on the current line 610 * 611 * Results: 612 * 0 if the character is not backslash escaped, 1 otherwise 613 * 614 * Side Effects: 615 * None 616 *---------------------------------------------------------------------- 617 */ 618 static int 619 ParseIsEscaped(const char *line, const char *c) 620 { 621 int active = 0; 622 for (;;) { 623 if (line == c) 624 return active; 625 if (*--c != '\\') 626 return active; 627 active = !active; 628 } 629 } 630 631 /*- 632 *---------------------------------------------------------------------- 633 * ParseFindKeyword -- 634 * Look in the table of keywords for one matching the given string. 635 * 636 * Input: 637 * str String to find 638 * 639 * Results: 640 * The index of the keyword, or -1 if it isn't there. 641 * 642 * Side Effects: 643 * None 644 *---------------------------------------------------------------------- 645 */ 646 static int 647 ParseFindKeyword(const char *str) 648 { 649 int start, end, cur; 650 int diff; 651 652 start = 0; 653 end = (sizeof(parseKeywords)/sizeof(parseKeywords[0])) - 1; 654 655 do { 656 cur = start + ((end - start) / 2); 657 diff = strcmp(str, parseKeywords[cur].name); 658 659 if (diff == 0) { 660 return cur; 661 } else if (diff < 0) { 662 end = cur - 1; 663 } else { 664 start = cur + 1; 665 } 666 } while (start <= end); 667 return -1; 668 } 669 670 /*- 671 * ParseVErrorInternal -- 672 * Error message abort function for parsing. Prints out the context 673 * of the error (line number and file) as well as the message with 674 * two optional arguments. 675 * 676 * Results: 677 * None 678 * 679 * Side Effects: 680 * "fatals" is incremented if the level is PARSE_FATAL. 681 */ 682 /* VARARGS */ 683 static void 684 ParseVErrorInternal(FILE *f, const char *cfname, size_t clineno, int type, 685 const char *fmt, va_list ap) 686 { 687 static Boolean fatal_warning_error_printed = FALSE; 688 char dirbuf[MAXPATHLEN+1]; 689 690 (void)fprintf(f, "%s: ", progname); 691 692 if (cfname != NULL) { 693 (void)fprintf(f, "\""); 694 if (*cfname != '/' && strcmp(cfname, "(stdin)") != 0) { 695 char *cp, *cp2; 696 const char *dir, *fname; 697 698 /* 699 * Nothing is more annoying than not knowing 700 * which Makefile is the culprit; we try ${.PARSEDIR} 701 * and apply realpath(3) if not absolute. 702 */ 703 dir = Var_Value(".PARSEDIR", VAR_GLOBAL, &cp); 704 if (dir == NULL) 705 dir = "."; 706 if (*dir != '/') { 707 dir = realpath(dir, dirbuf); 708 } 709 fname = Var_Value(".PARSEFILE", VAR_GLOBAL, &cp2); 710 if (fname == NULL) { 711 if ((fname = strrchr(cfname, '/'))) 712 fname++; 713 else 714 fname = cfname; 715 } 716 (void)fprintf(f, "%s/%s", dir, fname); 717 free(cp2); 718 free(cp); 719 } else 720 (void)fprintf(f, "%s", cfname); 721 722 (void)fprintf(f, "\" line %d: ", (int)clineno); 723 } 724 if (type == PARSE_WARNING) 725 (void)fprintf(f, "warning: "); 726 (void)vfprintf(f, fmt, ap); 727 (void)fprintf(f, "\n"); 728 (void)fflush(f); 729 if (type == PARSE_INFO) 730 return; 731 if (type == PARSE_FATAL || parseWarnFatal) 732 fatals += 1; 733 if (parseWarnFatal && !fatal_warning_error_printed) { 734 Error("parsing warnings being treated as errors"); 735 fatal_warning_error_printed = TRUE; 736 } 737 } 738 739 /*- 740 * ParseErrorInternal -- 741 * Error function 742 * 743 * Results: 744 * None 745 * 746 * Side Effects: 747 * None 748 */ 749 /* VARARGS */ 750 static void 751 ParseErrorInternal(const char *cfname, size_t clineno, int type, 752 const char *fmt, ...) 753 { 754 va_list ap; 755 756 va_start(ap, fmt); 757 (void)fflush(stdout); 758 ParseVErrorInternal(stderr, cfname, clineno, type, fmt, ap); 759 va_end(ap); 760 761 if (debug_file != stderr && debug_file != stdout) { 762 va_start(ap, fmt); 763 ParseVErrorInternal(debug_file, cfname, clineno, type, fmt, ap); 764 va_end(ap); 765 } 766 } 767 768 /*- 769 * Parse_Error -- 770 * External interface to ParseErrorInternal; uses the default filename 771 * Line number. 772 * 773 * Results: 774 * None 775 * 776 * Side Effects: 777 * None 778 */ 779 /* VARARGS */ 780 void 781 Parse_Error(int type, const char *fmt, ...) 782 { 783 va_list ap; 784 const char *fname; 785 size_t lineno; 786 787 if (curFile == NULL) { 788 fname = NULL; 789 lineno = 0; 790 } else { 791 fname = curFile->fname; 792 lineno = curFile->lineno; 793 } 794 795 va_start(ap, fmt); 796 (void)fflush(stdout); 797 ParseVErrorInternal(stderr, fname, lineno, type, fmt, ap); 798 va_end(ap); 799 800 if (debug_file != stderr && debug_file != stdout) { 801 va_start(ap, fmt); 802 ParseVErrorInternal(debug_file, fname, lineno, type, fmt, ap); 803 va_end(ap); 804 } 805 } 806 807 808 /* 809 * ParseMessage 810 * Parse a .info .warning or .error directive 811 * 812 * The input is the line minus the ".". We substitute 813 * variables, print the message and exit(1) (for .error) or just print 814 * a warning if the directive is malformed. 815 */ 816 static Boolean 817 ParseMessage(char *line) 818 { 819 int mtype; 820 821 switch(*line) { 822 case 'i': 823 mtype = PARSE_INFO; 824 break; 825 case 'w': 826 mtype = PARSE_WARNING; 827 break; 828 case 'e': 829 mtype = PARSE_FATAL; 830 break; 831 default: 832 Parse_Error(PARSE_WARNING, "invalid syntax: \".%s\"", line); 833 return FALSE; 834 } 835 836 while (isalpha((unsigned char)*line)) 837 line++; 838 if (!isspace((unsigned char)*line)) 839 return FALSE; /* not for us */ 840 while (isspace((unsigned char)*line)) 841 line++; 842 843 line = Var_Subst(NULL, line, VAR_CMD, VARF_WANTRES); 844 Parse_Error(mtype, "%s", line); 845 free(line); 846 847 if (mtype == PARSE_FATAL) { 848 /* Terminate immediately. */ 849 exit(1); 850 } 851 return TRUE; 852 } 853 854 /*- 855 *--------------------------------------------------------------------- 856 * ParseLinkSrc -- 857 * Link the parent node to its new child. Used in a Lst_ForEach by 858 * ParseDoDependency. If the specType isn't 'Not', the parent 859 * isn't linked as a parent of the child. 860 * 861 * Input: 862 * pgnp The parent node 863 * cgpn The child node 864 * 865 * Results: 866 * Always = 0 867 * 868 * Side Effects: 869 * New elements are added to the parents list of cgn and the 870 * children list of cgn. the unmade field of pgn is updated 871 * to reflect the additional child. 872 *--------------------------------------------------------------------- 873 */ 874 static int 875 ParseLinkSrc(void *pgnp, void *cgnp) 876 { 877 GNode *pgn = (GNode *)pgnp; 878 GNode *cgn = (GNode *)cgnp; 879 880 if ((pgn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (pgn->cohorts)) 881 pgn = (GNode *)Lst_Datum(Lst_Last(pgn->cohorts)); 882 (void)Lst_AtEnd(pgn->children, cgn); 883 if (specType == Not) 884 (void)Lst_AtEnd(cgn->parents, pgn); 885 pgn->unmade += 1; 886 if (DEBUG(PARSE)) { 887 fprintf(debug_file, "# %s: added child %s - %s\n", __func__, 888 pgn->name, cgn->name); 889 Targ_PrintNode(pgn, 0); 890 Targ_PrintNode(cgn, 0); 891 } 892 return 0; 893 } 894 895 /*- 896 *--------------------------------------------------------------------- 897 * ParseDoOp -- 898 * Apply the parsed operator to the given target node. Used in a 899 * Lst_ForEach call by ParseDoDependency once all targets have 900 * been found and their operator parsed. If the previous and new 901 * operators are incompatible, a major error is taken. 902 * 903 * Input: 904 * gnp The node to which the operator is to be applied 905 * opp The operator to apply 906 * 907 * Results: 908 * Always 0 909 * 910 * Side Effects: 911 * The type field of the node is altered to reflect any new bits in 912 * the op. 913 *--------------------------------------------------------------------- 914 */ 915 static int 916 ParseDoOp(void *gnp, void *opp) 917 { 918 GNode *gn = (GNode *)gnp; 919 int op = *(int *)opp; 920 /* 921 * If the dependency mask of the operator and the node don't match and 922 * the node has actually had an operator applied to it before, and 923 * the operator actually has some dependency information in it, complain. 924 */ 925 if (((op & OP_OPMASK) != (gn->type & OP_OPMASK)) && 926 !OP_NOP(gn->type) && !OP_NOP(op)) 927 { 928 Parse_Error(PARSE_FATAL, "Inconsistent operator for %s", gn->name); 929 return 1; 930 } 931 932 if ((op == OP_DOUBLEDEP) && ((gn->type & OP_OPMASK) == OP_DOUBLEDEP)) { 933 /* 934 * If the node was the object of a :: operator, we need to create a 935 * new instance of it for the children and commands on this dependency 936 * line. The new instance is placed on the 'cohorts' list of the 937 * initial one (note the initial one is not on its own cohorts list) 938 * and the new instance is linked to all parents of the initial 939 * instance. 940 */ 941 GNode *cohort; 942 943 /* 944 * Propagate copied bits to the initial node. They'll be propagated 945 * back to the rest of the cohorts later. 946 */ 947 gn->type |= op & ~OP_OPMASK; 948 949 cohort = Targ_FindNode(gn->name, TARG_NOHASH); 950 if (doing_depend) 951 ParseMark(cohort); 952 /* 953 * Make the cohort invisible as well to avoid duplicating it into 954 * other variables. True, parents of this target won't tend to do 955 * anything with their local variables, but better safe than 956 * sorry. (I think this is pointless now, since the relevant list 957 * traversals will no longer see this node anyway. -mycroft) 958 */ 959 cohort->type = op | OP_INVISIBLE; 960 (void)Lst_AtEnd(gn->cohorts, cohort); 961 cohort->centurion = gn; 962 gn->unmade_cohorts += 1; 963 snprintf(cohort->cohort_num, sizeof cohort->cohort_num, "#%d", 964 gn->unmade_cohorts); 965 } else { 966 /* 967 * We don't want to nuke any previous flags (whatever they were) so we 968 * just OR the new operator into the old 969 */ 970 gn->type |= op; 971 } 972 973 return 0; 974 } 975 976 /*- 977 *--------------------------------------------------------------------- 978 * ParseDoSrc -- 979 * Given the name of a source, figure out if it is an attribute 980 * and apply it to the targets if it is. Else decide if there is 981 * some attribute which should be applied *to* the source because 982 * of some special target and apply it if so. Otherwise, make the 983 * source be a child of the targets in the list 'targets' 984 * 985 * Input: 986 * tOp operator (if any) from special targets 987 * src name of the source to handle 988 * 989 * Results: 990 * None 991 * 992 * Side Effects: 993 * Operator bits may be added to the list of targets or to the source. 994 * The targets may have a new source added to their lists of children. 995 *--------------------------------------------------------------------- 996 */ 997 static void 998 ParseDoSrc(int tOp, const char *src) 999 { 1000 GNode *gn = NULL; 1001 static int wait_number = 0; 1002 char wait_src[16]; 1003 1004 if (*src == '.' && isupper ((unsigned char)src[1])) { 1005 int keywd = ParseFindKeyword(src); 1006 if (keywd != -1) { 1007 int op = parseKeywords[keywd].op; 1008 if (op != 0) { 1009 Lst_ForEach(targets, ParseDoOp, &op); 1010 return; 1011 } 1012 if (parseKeywords[keywd].spec == Wait) { 1013 /* 1014 * We add a .WAIT node in the dependency list. 1015 * After any dynamic dependencies (and filename globbing) 1016 * have happened, it is given a dependency on the each 1017 * previous child back to and previous .WAIT node. 1018 * The next child won't be scheduled until the .WAIT node 1019 * is built. 1020 * We give each .WAIT node a unique name (mainly for diag). 1021 */ 1022 snprintf(wait_src, sizeof wait_src, ".WAIT_%u", ++wait_number); 1023 gn = Targ_FindNode(wait_src, TARG_NOHASH); 1024 if (doing_depend) 1025 ParseMark(gn); 1026 gn->type = OP_WAIT | OP_PHONY | OP_DEPENDS | OP_NOTMAIN; 1027 Lst_ForEach(targets, ParseLinkSrc, gn); 1028 return; 1029 } 1030 } 1031 } 1032 1033 switch (specType) { 1034 case Main: 1035 /* 1036 * If we have noted the existence of a .MAIN, it means we need 1037 * to add the sources of said target to the list of things 1038 * to create. The string 'src' is likely to be free, so we 1039 * must make a new copy of it. Note that this will only be 1040 * invoked if the user didn't specify a target on the command 1041 * line. This is to allow #ifmake's to succeed, or something... 1042 */ 1043 (void)Lst_AtEnd(create, bmake_strdup(src)); 1044 /* 1045 * Add the name to the .TARGETS variable as well, so the user can 1046 * employ that, if desired. 1047 */ 1048 Var_Append(".TARGETS", src, VAR_GLOBAL); 1049 return; 1050 1051 case Order: 1052 /* 1053 * Create proper predecessor/successor links between the previous 1054 * source and the current one. 1055 */ 1056 gn = Targ_FindNode(src, TARG_CREATE); 1057 if (doing_depend) 1058 ParseMark(gn); 1059 if (predecessor != NULL) { 1060 (void)Lst_AtEnd(predecessor->order_succ, gn); 1061 (void)Lst_AtEnd(gn->order_pred, predecessor); 1062 if (DEBUG(PARSE)) { 1063 fprintf(debug_file, "# %s: added Order dependency %s - %s\n", 1064 __func__, predecessor->name, gn->name); 1065 Targ_PrintNode(predecessor, 0); 1066 Targ_PrintNode(gn, 0); 1067 } 1068 } 1069 /* 1070 * The current source now becomes the predecessor for the next one. 1071 */ 1072 predecessor = gn; 1073 break; 1074 1075 default: 1076 /* 1077 * If the source is not an attribute, we need to find/create 1078 * a node for it. After that we can apply any operator to it 1079 * from a special target or link it to its parents, as 1080 * appropriate. 1081 * 1082 * In the case of a source that was the object of a :: operator, 1083 * the attribute is applied to all of its instances (as kept in 1084 * the 'cohorts' list of the node) or all the cohorts are linked 1085 * to all the targets. 1086 */ 1087 1088 /* Find/create the 'src' node and attach to all targets */ 1089 gn = Targ_FindNode(src, TARG_CREATE); 1090 if (doing_depend) 1091 ParseMark(gn); 1092 if (tOp) { 1093 gn->type |= tOp; 1094 } else { 1095 Lst_ForEach(targets, ParseLinkSrc, gn); 1096 } 1097 break; 1098 } 1099 } 1100 1101 /*- 1102 *----------------------------------------------------------------------- 1103 * ParseFindMain -- 1104 * Find a real target in the list and set it to be the main one. 1105 * Called by ParseDoDependency when a main target hasn't been found 1106 * yet. 1107 * 1108 * Input: 1109 * gnp Node to examine 1110 * 1111 * Results: 1112 * 0 if main not found yet, 1 if it is. 1113 * 1114 * Side Effects: 1115 * mainNode is changed and Targ_SetMain is called. 1116 * 1117 *----------------------------------------------------------------------- 1118 */ 1119 static int 1120 ParseFindMain(void *gnp, void *dummy MAKE_ATTR_UNUSED) 1121 { 1122 GNode *gn = (GNode *)gnp; 1123 if ((gn->type & OP_NOTARGET) == 0) { 1124 mainNode = gn; 1125 Targ_SetMain(gn); 1126 return 1; 1127 } else { 1128 return 0; 1129 } 1130 } 1131 1132 /*- 1133 *----------------------------------------------------------------------- 1134 * ParseAddDir -- 1135 * Front-end for Dir_AddDir to make sure Lst_ForEach keeps going 1136 * 1137 * Results: 1138 * === 0 1139 * 1140 * Side Effects: 1141 * See Dir_AddDir. 1142 * 1143 *----------------------------------------------------------------------- 1144 */ 1145 static int 1146 ParseAddDir(void *path, void *name) 1147 { 1148 (void)Dir_AddDir((Lst) path, (char *)name); 1149 return 0; 1150 } 1151 1152 /*- 1153 *----------------------------------------------------------------------- 1154 * ParseClearPath -- 1155 * Front-end for Dir_ClearPath to make sure Lst_ForEach keeps going 1156 * 1157 * Results: 1158 * === 0 1159 * 1160 * Side Effects: 1161 * See Dir_ClearPath 1162 * 1163 *----------------------------------------------------------------------- 1164 */ 1165 static int 1166 ParseClearPath(void *path, void *dummy MAKE_ATTR_UNUSED) 1167 { 1168 Dir_ClearPath((Lst) path); 1169 return 0; 1170 } 1171 1172 /*- 1173 *--------------------------------------------------------------------- 1174 * ParseDoDependency -- 1175 * Parse the dependency line in line. 1176 * 1177 * Input: 1178 * line the line to parse 1179 * 1180 * Results: 1181 * None 1182 * 1183 * Side Effects: 1184 * The nodes of the sources are linked as children to the nodes of the 1185 * targets. Some nodes may be created. 1186 * 1187 * We parse a dependency line by first extracting words from the line and 1188 * finding nodes in the list of all targets with that name. This is done 1189 * until a character is encountered which is an operator character. Currently 1190 * these are only ! and :. At this point the operator is parsed and the 1191 * pointer into the line advanced until the first source is encountered. 1192 * The parsed operator is applied to each node in the 'targets' list, 1193 * which is where the nodes found for the targets are kept, by means of 1194 * the ParseDoOp function. 1195 * The sources are read in much the same way as the targets were except 1196 * that now they are expanded using the wildcarding scheme of the C-Shell 1197 * and all instances of the resulting words in the list of all targets 1198 * are found. Each of the resulting nodes is then linked to each of the 1199 * targets as one of its children. 1200 * Certain targets are handled specially. These are the ones detailed 1201 * by the specType variable. 1202 * The storing of transformation rules is also taken care of here. 1203 * A target is recognized as a transformation rule by calling 1204 * Suff_IsTransform. If it is a transformation rule, its node is gotten 1205 * from the suffix module via Suff_AddTransform rather than the standard 1206 * Targ_FindNode in the target module. 1207 *--------------------------------------------------------------------- 1208 */ 1209 static void 1210 ParseDoDependency(char *line) 1211 { 1212 char *cp; /* our current position */ 1213 GNode *gn = NULL; /* a general purpose temporary node */ 1214 int op; /* the operator on the line */ 1215 char savec; /* a place to save a character */ 1216 Lst paths; /* List of search paths to alter when parsing 1217 * a list of .PATH targets */ 1218 int tOp; /* operator from special target */ 1219 Lst sources; /* list of archive source names after 1220 * expansion */ 1221 Lst curTargs; /* list of target names to be found and added 1222 * to the targets list */ 1223 char *lstart = line; 1224 1225 if (DEBUG(PARSE)) 1226 fprintf(debug_file, "ParseDoDependency(%s)\n", line); 1227 tOp = 0; 1228 1229 specType = Not; 1230 paths = NULL; 1231 1232 curTargs = Lst_Init(FALSE); 1233 1234 /* 1235 * First, grind through the targets. 1236 */ 1237 1238 do { 1239 /* 1240 * Here LINE points to the beginning of the next word, and 1241 * LSTART points to the actual beginning of the line. 1242 */ 1243 1244 /* Find the end of the next word. */ 1245 for (cp = line; *cp && (ParseIsEscaped(lstart, cp) || 1246 !(isspace((unsigned char)*cp) || 1247 *cp == '!' || *cp == ':' || *cp == LPAREN)); 1248 cp++) { 1249 if (*cp == '$') { 1250 /* 1251 * Must be a dynamic source (would have been expanded 1252 * otherwise), so call the Var module to parse the puppy 1253 * so we can safely advance beyond it...There should be 1254 * no errors in this, as they would have been discovered 1255 * in the initial Var_Subst and we wouldn't be here. 1256 */ 1257 int length; 1258 void *freeIt; 1259 1260 (void)Var_Parse(cp, VAR_CMD, VARF_UNDEFERR|VARF_WANTRES, 1261 &length, &freeIt); 1262 free(freeIt); 1263 cp += length-1; 1264 } 1265 } 1266 1267 /* 1268 * If the word is followed by a left parenthesis, it's the 1269 * name of an object file inside an archive (ar file). 1270 */ 1271 if (!ParseIsEscaped(lstart, cp) && *cp == LPAREN) { 1272 /* 1273 * Archives must be handled specially to make sure the OP_ARCHV 1274 * flag is set in their 'type' field, for one thing, and because 1275 * things like "archive(file1.o file2.o file3.o)" are permissible. 1276 * Arch_ParseArchive will set 'line' to be the first non-blank 1277 * after the archive-spec. It creates/finds nodes for the members 1278 * and places them on the given list, returning SUCCESS if all 1279 * went well and FAILURE if there was an error in the 1280 * specification. On error, line should remain untouched. 1281 */ 1282 if (Arch_ParseArchive(&line, targets, VAR_CMD) != SUCCESS) { 1283 Parse_Error(PARSE_FATAL, 1284 "Error in archive specification: \"%s\"", line); 1285 goto out; 1286 } else { 1287 /* Done with this word; on to the next. */ 1288 cp = line; 1289 continue; 1290 } 1291 } 1292 1293 if (!*cp) { 1294 /* 1295 * We got to the end of the line while we were still 1296 * looking at targets. 1297 * 1298 * Ending a dependency line without an operator is a Bozo 1299 * no-no. As a heuristic, this is also often triggered by 1300 * undetected conflicts from cvs/rcs merges. 1301 */ 1302 if ((strncmp(line, "<<<<<<", 6) == 0) || 1303 (strncmp(line, "======", 6) == 0) || 1304 (strncmp(line, ">>>>>>", 6) == 0)) 1305 Parse_Error(PARSE_FATAL, 1306 "Makefile appears to contain unresolved cvs/rcs/??? merge conflicts"); 1307 else 1308 Parse_Error(PARSE_FATAL, lstart[0] == '.' ? "Unknown directive" 1309 : "Need an operator"); 1310 goto out; 1311 } 1312 1313 /* Insert a null terminator. */ 1314 savec = *cp; 1315 *cp = '\0'; 1316 1317 /* 1318 * Got the word. See if it's a special target and if so set 1319 * specType to match it. 1320 */ 1321 if (*line == '.' && isupper ((unsigned char)line[1])) { 1322 /* 1323 * See if the target is a special target that must have it 1324 * or its sources handled specially. 1325 */ 1326 int keywd = ParseFindKeyword(line); 1327 if (keywd != -1) { 1328 if (specType == ExPath && parseKeywords[keywd].spec != ExPath) { 1329 Parse_Error(PARSE_FATAL, "Mismatched special targets"); 1330 goto out; 1331 } 1332 1333 specType = parseKeywords[keywd].spec; 1334 tOp = parseKeywords[keywd].op; 1335 1336 /* 1337 * Certain special targets have special semantics: 1338 * .PATH Have to set the dirSearchPath 1339 * variable too 1340 * .MAIN Its sources are only used if 1341 * nothing has been specified to 1342 * create. 1343 * .DEFAULT Need to create a node to hang 1344 * commands on, but we don't want 1345 * it in the graph, nor do we want 1346 * it to be the Main Target, so we 1347 * create it, set OP_NOTMAIN and 1348 * add it to the list, setting 1349 * DEFAULT to the new node for 1350 * later use. We claim the node is 1351 * A transformation rule to make 1352 * life easier later, when we'll 1353 * use Make_HandleUse to actually 1354 * apply the .DEFAULT commands. 1355 * .PHONY The list of targets 1356 * .NOPATH Don't search for file in the path 1357 * .STALE 1358 * .BEGIN 1359 * .END 1360 * .ERROR 1361 * .DELETE_ON_ERROR 1362 * .INTERRUPT Are not to be considered the 1363 * main target. 1364 * .NOTPARALLEL Make only one target at a time. 1365 * .SINGLESHELL Create a shell for each command. 1366 * .ORDER Must set initial predecessor to NULL 1367 */ 1368 switch (specType) { 1369 case ExPath: 1370 if (paths == NULL) { 1371 paths = Lst_Init(FALSE); 1372 } 1373 (void)Lst_AtEnd(paths, dirSearchPath); 1374 break; 1375 case Main: 1376 if (!Lst_IsEmpty(create)) { 1377 specType = Not; 1378 } 1379 break; 1380 case Begin: 1381 case End: 1382 case Stale: 1383 case dotError: 1384 case Interrupt: 1385 gn = Targ_FindNode(line, TARG_CREATE); 1386 if (doing_depend) 1387 ParseMark(gn); 1388 gn->type |= OP_NOTMAIN|OP_SPECIAL; 1389 (void)Lst_AtEnd(targets, gn); 1390 break; 1391 case Default: 1392 gn = Targ_NewGN(".DEFAULT"); 1393 gn->type |= (OP_NOTMAIN|OP_TRANSFORM); 1394 (void)Lst_AtEnd(targets, gn); 1395 DEFAULT = gn; 1396 break; 1397 case DeleteOnError: 1398 deleteOnError = TRUE; 1399 break; 1400 case NotParallel: 1401 maxJobs = 1; 1402 break; 1403 case SingleShell: 1404 compatMake = TRUE; 1405 break; 1406 case Order: 1407 predecessor = NULL; 1408 break; 1409 default: 1410 break; 1411 } 1412 } else if (strncmp(line, ".PATH", 5) == 0) { 1413 /* 1414 * .PATH<suffix> has to be handled specially. 1415 * Call on the suffix module to give us a path to 1416 * modify. 1417 */ 1418 Lst path; 1419 1420 specType = ExPath; 1421 path = Suff_GetPath(&line[5]); 1422 if (path == NULL) { 1423 Parse_Error(PARSE_FATAL, 1424 "Suffix '%s' not defined (yet)", 1425 &line[5]); 1426 goto out; 1427 } else { 1428 if (paths == NULL) { 1429 paths = Lst_Init(FALSE); 1430 } 1431 (void)Lst_AtEnd(paths, path); 1432 } 1433 } 1434 } 1435 1436 /* 1437 * Have word in line. Get or create its node and stick it at 1438 * the end of the targets list 1439 */ 1440 if ((specType == Not) && (*line != '\0')) { 1441 if (Dir_HasWildcards(line)) { 1442 /* 1443 * Targets are to be sought only in the current directory, 1444 * so create an empty path for the thing. Note we need to 1445 * use Dir_Destroy in the destruction of the path as the 1446 * Dir module could have added a directory to the path... 1447 */ 1448 Lst emptyPath = Lst_Init(FALSE); 1449 1450 Dir_Expand(line, emptyPath, curTargs); 1451 1452 Lst_Destroy(emptyPath, Dir_Destroy); 1453 } else { 1454 /* 1455 * No wildcards, but we want to avoid code duplication, 1456 * so create a list with the word on it. 1457 */ 1458 (void)Lst_AtEnd(curTargs, line); 1459 } 1460 1461 /* Apply the targets. */ 1462 1463 while(!Lst_IsEmpty(curTargs)) { 1464 char *targName = (char *)Lst_DeQueue(curTargs); 1465 1466 if (!Suff_IsTransform (targName)) { 1467 gn = Targ_FindNode(targName, TARG_CREATE); 1468 } else { 1469 gn = Suff_AddTransform(targName); 1470 } 1471 if (doing_depend) 1472 ParseMark(gn); 1473 1474 (void)Lst_AtEnd(targets, gn); 1475 } 1476 } else if (specType == ExPath && *line != '.' && *line != '\0') { 1477 Parse_Error(PARSE_WARNING, "Extra target (%s) ignored", line); 1478 } 1479 1480 /* Don't need the inserted null terminator any more. */ 1481 *cp = savec; 1482 1483 /* 1484 * If it is a special type and not .PATH, it's the only target we 1485 * allow on this line... 1486 */ 1487 if (specType != Not && specType != ExPath) { 1488 Boolean warning = FALSE; 1489 1490 while (*cp && (ParseIsEscaped(lstart, cp) || 1491 ((*cp != '!') && (*cp != ':')))) { 1492 if (ParseIsEscaped(lstart, cp) || 1493 (*cp != ' ' && *cp != '\t')) { 1494 warning = TRUE; 1495 } 1496 cp++; 1497 } 1498 if (warning) { 1499 Parse_Error(PARSE_WARNING, "Extra target ignored"); 1500 } 1501 } else { 1502 while (*cp && isspace ((unsigned char)*cp)) { 1503 cp++; 1504 } 1505 } 1506 line = cp; 1507 } while (*line && (ParseIsEscaped(lstart, line) || 1508 ((*line != '!') && (*line != ':')))); 1509 1510 /* 1511 * Don't need the list of target names anymore... 1512 */ 1513 Lst_Destroy(curTargs, NULL); 1514 curTargs = NULL; 1515 1516 if (!Lst_IsEmpty(targets)) { 1517 switch(specType) { 1518 default: 1519 Parse_Error(PARSE_WARNING, "Special and mundane targets don't mix. Mundane ones ignored"); 1520 break; 1521 case Default: 1522 case Stale: 1523 case Begin: 1524 case End: 1525 case dotError: 1526 case Interrupt: 1527 /* 1528 * These four create nodes on which to hang commands, so 1529 * targets shouldn't be empty... 1530 */ 1531 case Not: 1532 /* 1533 * Nothing special here -- targets can be empty if it wants. 1534 */ 1535 break; 1536 } 1537 } 1538 1539 /* 1540 * Have now parsed all the target names. Must parse the operator next. The 1541 * result is left in op . 1542 */ 1543 if (*cp == '!') { 1544 op = OP_FORCE; 1545 } else if (*cp == ':') { 1546 if (cp[1] == ':') { 1547 op = OP_DOUBLEDEP; 1548 cp++; 1549 } else { 1550 op = OP_DEPENDS; 1551 } 1552 } else { 1553 Parse_Error(PARSE_FATAL, lstart[0] == '.' ? "Unknown directive" 1554 : "Missing dependency operator"); 1555 goto out; 1556 } 1557 1558 /* Advance beyond the operator */ 1559 cp++; 1560 1561 /* 1562 * Apply the operator to the target. This is how we remember which 1563 * operator a target was defined with. It fails if the operator 1564 * used isn't consistent across all references. 1565 */ 1566 Lst_ForEach(targets, ParseDoOp, &op); 1567 1568 /* 1569 * Onward to the sources. 1570 * 1571 * LINE will now point to the first source word, if any, or the 1572 * end of the string if not. 1573 */ 1574 while (*cp && isspace ((unsigned char)*cp)) { 1575 cp++; 1576 } 1577 line = cp; 1578 1579 /* 1580 * Several special targets take different actions if present with no 1581 * sources: 1582 * a .SUFFIXES line with no sources clears out all old suffixes 1583 * a .PRECIOUS line makes all targets precious 1584 * a .IGNORE line ignores errors for all targets 1585 * a .SILENT line creates silence when making all targets 1586 * a .PATH removes all directories from the search path(s). 1587 */ 1588 if (!*line) { 1589 switch (specType) { 1590 case Suffixes: 1591 Suff_ClearSuffixes(); 1592 break; 1593 case Precious: 1594 allPrecious = TRUE; 1595 break; 1596 case Ignore: 1597 ignoreErrors = TRUE; 1598 break; 1599 case Silent: 1600 beSilent = TRUE; 1601 break; 1602 case ExPath: 1603 Lst_ForEach(paths, ParseClearPath, NULL); 1604 Dir_SetPATH(); 1605 break; 1606 #ifdef POSIX 1607 case Posix: 1608 Var_Set("%POSIX", "1003.2", VAR_GLOBAL); 1609 break; 1610 #endif 1611 default: 1612 break; 1613 } 1614 } else if (specType == MFlags) { 1615 /* 1616 * Call on functions in main.c to deal with these arguments and 1617 * set the initial character to a null-character so the loop to 1618 * get sources won't get anything 1619 */ 1620 Main_ParseArgLine(line); 1621 *line = '\0'; 1622 } else if (specType == ExShell) { 1623 if (Job_ParseShell(line) != SUCCESS) { 1624 Parse_Error(PARSE_FATAL, "improper shell specification"); 1625 goto out; 1626 } 1627 *line = '\0'; 1628 } else if ((specType == NotParallel) || (specType == SingleShell) || 1629 (specType == DeleteOnError)) { 1630 *line = '\0'; 1631 } 1632 1633 /* 1634 * NOW GO FOR THE SOURCES 1635 */ 1636 if ((specType == Suffixes) || (specType == ExPath) || 1637 (specType == Includes) || (specType == Libs) || 1638 (specType == Null) || (specType == ExObjdir)) 1639 { 1640 while (*line) { 1641 /* 1642 * If the target was one that doesn't take files as its sources 1643 * but takes something like suffixes, we take each 1644 * space-separated word on the line as a something and deal 1645 * with it accordingly. 1646 * 1647 * If the target was .SUFFIXES, we take each source as a 1648 * suffix and add it to the list of suffixes maintained by the 1649 * Suff module. 1650 * 1651 * If the target was a .PATH, we add the source as a directory 1652 * to search on the search path. 1653 * 1654 * If it was .INCLUDES, the source is taken to be the suffix of 1655 * files which will be #included and whose search path should 1656 * be present in the .INCLUDES variable. 1657 * 1658 * If it was .LIBS, the source is taken to be the suffix of 1659 * files which are considered libraries and whose search path 1660 * should be present in the .LIBS variable. 1661 * 1662 * If it was .NULL, the source is the suffix to use when a file 1663 * has no valid suffix. 1664 * 1665 * If it was .OBJDIR, the source is a new definition for .OBJDIR, 1666 * and will cause make to do a new chdir to that path. 1667 */ 1668 while (*cp && !isspace ((unsigned char)*cp)) { 1669 cp++; 1670 } 1671 savec = *cp; 1672 *cp = '\0'; 1673 switch (specType) { 1674 case Suffixes: 1675 Suff_AddSuffix(line, &mainNode); 1676 break; 1677 case ExPath: 1678 Lst_ForEach(paths, ParseAddDir, line); 1679 break; 1680 case Includes: 1681 Suff_AddInclude(line); 1682 break; 1683 case Libs: 1684 Suff_AddLib(line); 1685 break; 1686 case Null: 1687 Suff_SetNull(line); 1688 break; 1689 case ExObjdir: 1690 Main_SetObjdir("%s", line); 1691 break; 1692 default: 1693 break; 1694 } 1695 *cp = savec; 1696 if (savec != '\0') { 1697 cp++; 1698 } 1699 while (*cp && isspace ((unsigned char)*cp)) { 1700 cp++; 1701 } 1702 line = cp; 1703 } 1704 if (paths) { 1705 Lst_Destroy(paths, NULL); 1706 paths = NULL; 1707 } 1708 if (specType == ExPath) 1709 Dir_SetPATH(); 1710 } else { 1711 assert(paths == NULL); 1712 while (*line) { 1713 /* 1714 * The targets take real sources, so we must beware of archive 1715 * specifications (i.e. things with left parentheses in them) 1716 * and handle them accordingly. 1717 */ 1718 for (; *cp && !isspace ((unsigned char)*cp); cp++) { 1719 if ((*cp == LPAREN) && (cp > line) && (cp[-1] != '$')) { 1720 /* 1721 * Only stop for a left parenthesis if it isn't at the 1722 * start of a word (that'll be for variable changes 1723 * later) and isn't preceded by a dollar sign (a dynamic 1724 * source). 1725 */ 1726 break; 1727 } 1728 } 1729 1730 if (*cp == LPAREN) { 1731 sources = Lst_Init(FALSE); 1732 if (Arch_ParseArchive(&line, sources, VAR_CMD) != SUCCESS) { 1733 Parse_Error(PARSE_FATAL, 1734 "Error in source archive spec \"%s\"", line); 1735 goto out; 1736 } 1737 1738 while (!Lst_IsEmpty (sources)) { 1739 gn = (GNode *)Lst_DeQueue(sources); 1740 ParseDoSrc(tOp, gn->name); 1741 } 1742 Lst_Destroy(sources, NULL); 1743 cp = line; 1744 } else { 1745 if (*cp) { 1746 *cp = '\0'; 1747 cp += 1; 1748 } 1749 1750 ParseDoSrc(tOp, line); 1751 } 1752 while (*cp && isspace ((unsigned char)*cp)) { 1753 cp++; 1754 } 1755 line = cp; 1756 } 1757 } 1758 1759 if (mainNode == NULL) { 1760 /* 1761 * If we have yet to decide on a main target to make, in the 1762 * absence of any user input, we want the first target on 1763 * the first dependency line that is actually a real target 1764 * (i.e. isn't a .USE or .EXEC rule) to be made. 1765 */ 1766 Lst_ForEach(targets, ParseFindMain, NULL); 1767 } 1768 1769 out: 1770 if (paths) 1771 Lst_Destroy(paths, NULL); 1772 if (curTargs) 1773 Lst_Destroy(curTargs, NULL); 1774 } 1775 1776 /*- 1777 *--------------------------------------------------------------------- 1778 * Parse_IsVar -- 1779 * Return TRUE if the passed line is a variable assignment. A variable 1780 * assignment consists of a single word followed by optional whitespace 1781 * followed by either a += or an = operator. 1782 * This function is used both by the Parse_File function and main when 1783 * parsing the command-line arguments. 1784 * 1785 * Input: 1786 * line the line to check 1787 * 1788 * Results: 1789 * TRUE if it is. FALSE if it ain't 1790 * 1791 * Side Effects: 1792 * none 1793 *--------------------------------------------------------------------- 1794 */ 1795 Boolean 1796 Parse_IsVar(char *line) 1797 { 1798 Boolean wasSpace = FALSE; /* set TRUE if found a space */ 1799 char ch; 1800 int level = 0; 1801 #define ISEQOPERATOR(c) \ 1802 (((c) == '+') || ((c) == ':') || ((c) == '?') || ((c) == '!')) 1803 1804 /* 1805 * Skip to variable name 1806 */ 1807 for (;(*line == ' ') || (*line == '\t'); line++) 1808 continue; 1809 1810 /* Scan for one of the assignment operators outside a variable expansion */ 1811 while ((ch = *line++) != 0) { 1812 if (ch == '(' || ch == '{') { 1813 level++; 1814 continue; 1815 } 1816 if (ch == ')' || ch == '}') { 1817 level--; 1818 continue; 1819 } 1820 if (level != 0) 1821 continue; 1822 while (ch == ' ' || ch == '\t') { 1823 ch = *line++; 1824 wasSpace = TRUE; 1825 } 1826 #ifdef SUNSHCMD 1827 if (ch == ':' && strncmp(line, "sh", 2) == 0) { 1828 line += 2; 1829 continue; 1830 } 1831 #endif 1832 if (ch == '=') 1833 return TRUE; 1834 if (*line == '=' && ISEQOPERATOR(ch)) 1835 return TRUE; 1836 if (wasSpace) 1837 return FALSE; 1838 } 1839 1840 return FALSE; 1841 } 1842 1843 /*- 1844 *--------------------------------------------------------------------- 1845 * Parse_DoVar -- 1846 * Take the variable assignment in the passed line and do it in the 1847 * global context. 1848 * 1849 * Note: There is a lexical ambiguity with assignment modifier characters 1850 * in variable names. This routine interprets the character before the = 1851 * as a modifier. Therefore, an assignment like 1852 * C++=/usr/bin/CC 1853 * is interpreted as "C+ +=" instead of "C++ =". 1854 * 1855 * Input: 1856 * line a line guaranteed to be a variable assignment. 1857 * This reduces error checks 1858 * ctxt Context in which to do the assignment 1859 * 1860 * Results: 1861 * none 1862 * 1863 * Side Effects: 1864 * the variable structure of the given variable name is altered in the 1865 * global context. 1866 *--------------------------------------------------------------------- 1867 */ 1868 void 1869 Parse_DoVar(char *line, GNode *ctxt) 1870 { 1871 char *cp; /* pointer into line */ 1872 enum { 1873 VAR_SUBST, VAR_APPEND, VAR_SHELL, VAR_NORMAL 1874 } type; /* Type of assignment */ 1875 char *opc; /* ptr to operator character to 1876 * null-terminate the variable name */ 1877 Boolean freeCp = FALSE; /* TRUE if cp needs to be freed, 1878 * i.e. if any variable expansion was 1879 * performed */ 1880 int depth; 1881 1882 /* 1883 * Skip to variable name 1884 */ 1885 while ((*line == ' ') || (*line == '\t')) { 1886 line++; 1887 } 1888 1889 /* 1890 * Skip to operator character, nulling out whitespace as we go 1891 * XXX Rather than counting () and {} we should look for $ and 1892 * then expand the variable. 1893 */ 1894 for (depth = 0, cp = line + 1; depth > 0 || *cp != '='; cp++) { 1895 if (*cp == '(' || *cp == '{') { 1896 depth++; 1897 continue; 1898 } 1899 if (*cp == ')' || *cp == '}') { 1900 depth--; 1901 continue; 1902 } 1903 if (depth == 0 && isspace ((unsigned char)*cp)) { 1904 *cp = '\0'; 1905 } 1906 } 1907 opc = cp-1; /* operator is the previous character */ 1908 *cp++ = '\0'; /* nuke the = */ 1909 1910 /* 1911 * Check operator type 1912 */ 1913 switch (*opc) { 1914 case '+': 1915 type = VAR_APPEND; 1916 *opc = '\0'; 1917 break; 1918 1919 case '?': 1920 /* 1921 * If the variable already has a value, we don't do anything. 1922 */ 1923 *opc = '\0'; 1924 if (Var_Exists(line, ctxt)) { 1925 return; 1926 } else { 1927 type = VAR_NORMAL; 1928 } 1929 break; 1930 1931 case ':': 1932 type = VAR_SUBST; 1933 *opc = '\0'; 1934 break; 1935 1936 case '!': 1937 type = VAR_SHELL; 1938 *opc = '\0'; 1939 break; 1940 1941 default: 1942 #ifdef SUNSHCMD 1943 while (opc > line && *opc != ':') 1944 opc--; 1945 1946 if (strncmp(opc, ":sh", 3) == 0) { 1947 type = VAR_SHELL; 1948 *opc = '\0'; 1949 break; 1950 } 1951 #endif 1952 type = VAR_NORMAL; 1953 break; 1954 } 1955 1956 while (isspace ((unsigned char)*cp)) { 1957 cp++; 1958 } 1959 1960 if (type == VAR_APPEND) { 1961 Var_Append(line, cp, ctxt); 1962 } else if (type == VAR_SUBST) { 1963 /* 1964 * Allow variables in the old value to be undefined, but leave their 1965 * invocation alone -- this is done by forcing oldVars to be false. 1966 * XXX: This can cause recursive variables, but that's not hard to do, 1967 * and this allows someone to do something like 1968 * 1969 * CFLAGS = $(.INCLUDES) 1970 * CFLAGS := -I.. $(CFLAGS) 1971 * 1972 * And not get an error. 1973 */ 1974 Boolean oldOldVars = oldVars; 1975 1976 oldVars = FALSE; 1977 1978 /* 1979 * make sure that we set the variable the first time to nothing 1980 * so that it gets substituted! 1981 */ 1982 if (!Var_Exists(line, ctxt)) 1983 Var_Set(line, "", ctxt); 1984 1985 cp = Var_Subst(NULL, cp, ctxt, VARF_WANTRES|VARF_ASSIGN); 1986 oldVars = oldOldVars; 1987 freeCp = TRUE; 1988 1989 Var_Set(line, cp, ctxt); 1990 } else if (type == VAR_SHELL) { 1991 char *res; 1992 const char *error; 1993 1994 if (strchr(cp, '$') != NULL) { 1995 /* 1996 * There's a dollar sign in the command, so perform variable 1997 * expansion on the whole thing. The resulting string will need 1998 * freeing when we're done, so set freeCmd to TRUE. 1999 */ 2000 cp = Var_Subst(NULL, cp, VAR_CMD, VARF_UNDEFERR|VARF_WANTRES); 2001 freeCp = TRUE; 2002 } 2003 2004 res = Cmd_Exec(cp, &error); 2005 Var_Set(line, res, ctxt); 2006 free(res); 2007 2008 if (error) 2009 Parse_Error(PARSE_WARNING, error, cp); 2010 } else { 2011 /* 2012 * Normal assignment -- just do it. 2013 */ 2014 Var_Set(line, cp, ctxt); 2015 } 2016 if (strcmp(line, MAKEOVERRIDES) == 0) 2017 Main_ExportMAKEFLAGS(FALSE); /* re-export MAKEFLAGS */ 2018 else if (strcmp(line, ".CURDIR") == 0) { 2019 /* 2020 * Somone is being (too?) clever... 2021 * Let's pretend they know what they are doing and 2022 * re-initialize the 'cur' Path. 2023 */ 2024 Dir_InitCur(cp); 2025 Dir_SetPATH(); 2026 } else if (strcmp(line, MAKE_JOB_PREFIX) == 0) { 2027 Job_SetPrefix(); 2028 } else if (strcmp(line, MAKE_EXPORTED) == 0) { 2029 Var_Export(cp, 0); 2030 } 2031 if (freeCp) 2032 free(cp); 2033 } 2034 2035 2036 /* 2037 * ParseMaybeSubMake -- 2038 * Scan the command string to see if it a possible submake node 2039 * Input: 2040 * cmd the command to scan 2041 * Results: 2042 * TRUE if the command is possibly a submake, FALSE if not. 2043 */ 2044 static Boolean 2045 ParseMaybeSubMake(const char *cmd) 2046 { 2047 size_t i; 2048 static struct { 2049 const char *name; 2050 size_t len; 2051 } vals[] = { 2052 #define MKV(A) { A, sizeof(A) - 1 } 2053 MKV("${MAKE}"), 2054 MKV("${.MAKE}"), 2055 MKV("$(MAKE)"), 2056 MKV("$(.MAKE)"), 2057 MKV("make"), 2058 }; 2059 for (i = 0; i < sizeof(vals)/sizeof(vals[0]); i++) { 2060 char *ptr; 2061 if ((ptr = strstr(cmd, vals[i].name)) == NULL) 2062 continue; 2063 if ((ptr == cmd || !isalnum((unsigned char)ptr[-1])) 2064 && !isalnum((unsigned char)ptr[vals[i].len])) 2065 return TRUE; 2066 } 2067 return FALSE; 2068 } 2069 2070 /*- 2071 * ParseAddCmd -- 2072 * Lst_ForEach function to add a command line to all targets 2073 * 2074 * Input: 2075 * gnp the node to which the command is to be added 2076 * cmd the command to add 2077 * 2078 * Results: 2079 * Always 0 2080 * 2081 * Side Effects: 2082 * A new element is added to the commands list of the node, 2083 * and the node can be marked as a submake node if the command is 2084 * determined to be that. 2085 */ 2086 static int 2087 ParseAddCmd(void *gnp, void *cmd) 2088 { 2089 GNode *gn = (GNode *)gnp; 2090 2091 /* Add to last (ie current) cohort for :: targets */ 2092 if ((gn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (gn->cohorts)) 2093 gn = (GNode *)Lst_Datum(Lst_Last(gn->cohorts)); 2094 2095 /* if target already supplied, ignore commands */ 2096 if (!(gn->type & OP_HAS_COMMANDS)) { 2097 (void)Lst_AtEnd(gn->commands, cmd); 2098 if (ParseMaybeSubMake(cmd)) 2099 gn->type |= OP_SUBMAKE; 2100 ParseMark(gn); 2101 } else { 2102 #ifdef notyet 2103 /* XXX: We cannot do this until we fix the tree */ 2104 (void)Lst_AtEnd(gn->commands, cmd); 2105 Parse_Error(PARSE_WARNING, 2106 "overriding commands for target \"%s\"; " 2107 "previous commands defined at %s: %d ignored", 2108 gn->name, gn->fname, gn->lineno); 2109 #else 2110 Parse_Error(PARSE_WARNING, 2111 "duplicate script for target \"%s\" ignored", 2112 gn->name); 2113 ParseErrorInternal(gn->fname, gn->lineno, PARSE_WARNING, 2114 "using previous script for \"%s\" defined here", 2115 gn->name); 2116 #endif 2117 } 2118 return 0; 2119 } 2120 2121 /*- 2122 *----------------------------------------------------------------------- 2123 * ParseHasCommands -- 2124 * Callback procedure for Parse_File when destroying the list of 2125 * targets on the last dependency line. Marks a target as already 2126 * having commands if it does, to keep from having shell commands 2127 * on multiple dependency lines. 2128 * 2129 * Input: 2130 * gnp Node to examine 2131 * 2132 * Results: 2133 * None 2134 * 2135 * Side Effects: 2136 * OP_HAS_COMMANDS may be set for the target. 2137 * 2138 *----------------------------------------------------------------------- 2139 */ 2140 static void 2141 ParseHasCommands(void *gnp) 2142 { 2143 GNode *gn = (GNode *)gnp; 2144 if (!Lst_IsEmpty(gn->commands)) { 2145 gn->type |= OP_HAS_COMMANDS; 2146 } 2147 } 2148 2149 /*- 2150 *----------------------------------------------------------------------- 2151 * Parse_AddIncludeDir -- 2152 * Add a directory to the path searched for included makefiles 2153 * bracketed by double-quotes. Used by functions in main.c 2154 * 2155 * Input: 2156 * dir The name of the directory to add 2157 * 2158 * Results: 2159 * None. 2160 * 2161 * Side Effects: 2162 * The directory is appended to the list. 2163 * 2164 *----------------------------------------------------------------------- 2165 */ 2166 void 2167 Parse_AddIncludeDir(char *dir) 2168 { 2169 (void)Dir_AddDir(parseIncPath, dir); 2170 } 2171 2172 /*- 2173 *--------------------------------------------------------------------- 2174 * ParseDoInclude -- 2175 * Push to another file. 2176 * 2177 * The input is the line minus the `.'. A file spec is a string 2178 * enclosed in <> or "". The former is looked for only in sysIncPath. 2179 * The latter in . and the directories specified by -I command line 2180 * options 2181 * 2182 * Results: 2183 * None 2184 * 2185 * Side Effects: 2186 * A structure is added to the includes Lst and readProc, lineno, 2187 * fname and curFILE are altered for the new file 2188 *--------------------------------------------------------------------- 2189 */ 2190 2191 static void 2192 Parse_include_file(char *file, Boolean isSystem, Boolean depinc, int silent) 2193 { 2194 struct loadedfile *lf; 2195 char *fullname; /* full pathname of file */ 2196 char *newName; 2197 char *prefEnd, *incdir; 2198 int fd; 2199 int i; 2200 2201 /* 2202 * Now we know the file's name and its search path, we attempt to 2203 * find the durn thing. A return of NULL indicates the file don't 2204 * exist. 2205 */ 2206 fullname = file[0] == '/' ? bmake_strdup(file) : NULL; 2207 2208 if (fullname == NULL && !isSystem) { 2209 /* 2210 * Include files contained in double-quotes are first searched for 2211 * relative to the including file's location. We don't want to 2212 * cd there, of course, so we just tack on the old file's 2213 * leading path components and call Dir_FindFile to see if 2214 * we can locate the beast. 2215 */ 2216 2217 incdir = bmake_strdup(curFile->fname); 2218 prefEnd = strrchr(incdir, '/'); 2219 if (prefEnd != NULL) { 2220 *prefEnd = '\0'; 2221 /* Now do lexical processing of leading "../" on the filename */ 2222 for (i = 0; strncmp(file + i, "../", 3) == 0; i += 3) { 2223 prefEnd = strrchr(incdir + 1, '/'); 2224 if (prefEnd == NULL || strcmp(prefEnd, "/..") == 0) 2225 break; 2226 *prefEnd = '\0'; 2227 } 2228 newName = str_concat(incdir, file + i, STR_ADDSLASH); 2229 fullname = Dir_FindFile(newName, parseIncPath); 2230 if (fullname == NULL) 2231 fullname = Dir_FindFile(newName, dirSearchPath); 2232 free(newName); 2233 } 2234 free(incdir); 2235 2236 if (fullname == NULL) { 2237 /* 2238 * Makefile wasn't found in same directory as included makefile. 2239 * Search for it first on the -I search path, 2240 * then on the .PATH search path, if not found in a -I directory. 2241 * If we have a suffix specific path we should use that. 2242 */ 2243 char *suff; 2244 Lst suffPath = NULL; 2245 2246 if ((suff = strrchr(file, '.'))) { 2247 suffPath = Suff_GetPath(suff); 2248 if (suffPath != NULL) { 2249 fullname = Dir_FindFile(file, suffPath); 2250 } 2251 } 2252 if (fullname == NULL) { 2253 fullname = Dir_FindFile(file, parseIncPath); 2254 if (fullname == NULL) { 2255 fullname = Dir_FindFile(file, dirSearchPath); 2256 } 2257 } 2258 } 2259 } 2260 2261 /* Looking for a system file or file still not found */ 2262 if (fullname == NULL) { 2263 /* 2264 * Look for it on the system path 2265 */ 2266 fullname = Dir_FindFile(file, 2267 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath); 2268 } 2269 2270 if (fullname == NULL) { 2271 if (!silent) 2272 Parse_Error(PARSE_FATAL, "Could not find %s", file); 2273 return; 2274 } 2275 2276 /* Actually open the file... */ 2277 fd = open(fullname, O_RDONLY); 2278 if (fd == -1) { 2279 if (!silent) 2280 Parse_Error(PARSE_FATAL, "Cannot open %s", fullname); 2281 free(fullname); 2282 return; 2283 } 2284 2285 /* load it */ 2286 lf = loadfile(fullname, fd); 2287 2288 ParseSetIncludedFile(); 2289 /* Start reading from this file next */ 2290 Parse_SetInput(fullname, 0, -1, loadedfile_nextbuf, lf); 2291 curFile->lf = lf; 2292 if (depinc) 2293 doing_depend = depinc; /* only turn it on */ 2294 } 2295 2296 static void 2297 ParseDoInclude(char *line) 2298 { 2299 char endc; /* the character which ends the file spec */ 2300 char *cp; /* current position in file spec */ 2301 int silent = (*line != 'i') ? 1 : 0; 2302 char *file = &line[7 + silent]; 2303 2304 /* Skip to delimiter character so we know where to look */ 2305 while (*file == ' ' || *file == '\t') 2306 file++; 2307 2308 if (*file != '"' && *file != '<') { 2309 Parse_Error(PARSE_FATAL, 2310 ".include filename must be delimited by '\"' or '<'"); 2311 return; 2312 } 2313 2314 /* 2315 * Set the search path on which to find the include file based on the 2316 * characters which bracket its name. Angle-brackets imply it's 2317 * a system Makefile while double-quotes imply it's a user makefile 2318 */ 2319 if (*file == '<') { 2320 endc = '>'; 2321 } else { 2322 endc = '"'; 2323 } 2324 2325 /* Skip to matching delimiter */ 2326 for (cp = ++file; *cp && *cp != endc; cp++) 2327 continue; 2328 2329 if (*cp != endc) { 2330 Parse_Error(PARSE_FATAL, 2331 "Unclosed %cinclude filename. '%c' expected", 2332 '.', endc); 2333 return; 2334 } 2335 *cp = '\0'; 2336 2337 /* 2338 * Substitute for any variables in the file name before trying to 2339 * find the thing. 2340 */ 2341 file = Var_Subst(NULL, file, VAR_CMD, VARF_WANTRES); 2342 2343 Parse_include_file(file, endc == '>', (*line == 'd'), silent); 2344 free(file); 2345 } 2346 2347 2348 /*- 2349 *--------------------------------------------------------------------- 2350 * ParseSetIncludedFile -- 2351 * Set the .INCLUDEDFROMFILE variable to the contents of .PARSEFILE 2352 * and the .INCLUDEDFROMDIR variable to the contents of .PARSEDIR 2353 * 2354 * Results: 2355 * None 2356 * 2357 * Side Effects: 2358 * The .INCLUDEDFROMFILE variable is overwritten by the contents 2359 * of .PARSEFILE and the .INCLUDEDFROMDIR variable is overwriten 2360 * by the contents of .PARSEDIR 2361 *--------------------------------------------------------------------- 2362 */ 2363 static void 2364 ParseSetIncludedFile(void) 2365 { 2366 char *pf, *fp = NULL; 2367 char *pd, *dp = NULL; 2368 2369 pf = Var_Value(".PARSEFILE", VAR_GLOBAL, &fp); 2370 Var_Set(".INCLUDEDFROMFILE", pf, VAR_GLOBAL); 2371 pd = Var_Value(".PARSEDIR", VAR_GLOBAL, &dp); 2372 Var_Set(".INCLUDEDFROMDIR", pd, VAR_GLOBAL); 2373 2374 if (DEBUG(PARSE)) 2375 fprintf(debug_file, "%s: ${.INCLUDEDFROMDIR} = `%s' " 2376 "${.INCLUDEDFROMFILE} = `%s'\n", __func__, pd, pf); 2377 2378 free(fp); 2379 free(dp); 2380 } 2381 /*- 2382 *--------------------------------------------------------------------- 2383 * ParseSetParseFile -- 2384 * Set the .PARSEDIR and .PARSEFILE variables to the dirname and 2385 * basename of the given filename 2386 * 2387 * Results: 2388 * None 2389 * 2390 * Side Effects: 2391 * The .PARSEDIR and .PARSEFILE variables are overwritten by the 2392 * dirname and basename of the given filename. 2393 *--------------------------------------------------------------------- 2394 */ 2395 static void 2396 ParseSetParseFile(const char *filename) 2397 { 2398 char *slash, *dirname; 2399 const char *pd, *pf; 2400 int len; 2401 2402 slash = strrchr(filename, '/'); 2403 if (slash == NULL) { 2404 Var_Set(".PARSEDIR", pd = curdir, VAR_GLOBAL); 2405 Var_Set(".PARSEFILE", pf = filename, VAR_GLOBAL); 2406 dirname= NULL; 2407 } else { 2408 len = slash - filename; 2409 dirname = bmake_malloc(len + 1); 2410 memcpy(dirname, filename, len); 2411 dirname[len] = '\0'; 2412 Var_Set(".PARSEDIR", pd = dirname, VAR_GLOBAL); 2413 Var_Set(".PARSEFILE", pf = slash + 1, VAR_GLOBAL); 2414 } 2415 if (DEBUG(PARSE)) 2416 fprintf(debug_file, "%s: ${.PARSEDIR} = `%s' ${.PARSEFILE} = `%s'\n", 2417 __func__, pd, pf); 2418 free(dirname); 2419 } 2420 2421 /* 2422 * Track the makefiles we read - so makefiles can 2423 * set dependencies on them. 2424 * Avoid adding anything more than once. 2425 */ 2426 2427 static void 2428 ParseTrackInput(const char *name) 2429 { 2430 char *old; 2431 char *ep; 2432 char *fp = NULL; 2433 size_t name_len = strlen(name); 2434 2435 old = Var_Value(MAKE_MAKEFILES, VAR_GLOBAL, &fp); 2436 if (old) { 2437 ep = old + strlen(old) - name_len; 2438 /* does it contain name? */ 2439 for (; old != NULL; old = strchr(old, ' ')) { 2440 if (*old == ' ') 2441 old++; 2442 if (old >= ep) 2443 break; /* cannot contain name */ 2444 if (memcmp(old, name, name_len) == 0 2445 && (old[name_len] == 0 || old[name_len] == ' ')) 2446 goto cleanup; 2447 } 2448 } 2449 Var_Append (MAKE_MAKEFILES, name, VAR_GLOBAL); 2450 cleanup: 2451 if (fp) { 2452 free(fp); 2453 } 2454 } 2455 2456 2457 /*- 2458 *--------------------------------------------------------------------- 2459 * Parse_setInput -- 2460 * Start Parsing from the given source 2461 * 2462 * Results: 2463 * None 2464 * 2465 * Side Effects: 2466 * A structure is added to the includes Lst and readProc, lineno, 2467 * fname and curFile are altered for the new file 2468 *--------------------------------------------------------------------- 2469 */ 2470 void 2471 Parse_SetInput(const char *name, int line, int fd, 2472 char *(*nextbuf)(void *, size_t *), void *arg) 2473 { 2474 char *buf; 2475 size_t len; 2476 2477 if (name == NULL) 2478 name = curFile->fname; 2479 else 2480 ParseTrackInput(name); 2481 2482 if (DEBUG(PARSE)) 2483 fprintf(debug_file, "%s: file %s, line %d, fd %d, nextbuf %p, arg %p\n", 2484 __func__, name, line, fd, nextbuf, arg); 2485 2486 if (fd == -1 && nextbuf == NULL) 2487 /* sanity */ 2488 return; 2489 2490 if (curFile != NULL) 2491 /* Save exiting file info */ 2492 Lst_AtFront(includes, curFile); 2493 2494 /* Allocate and fill in new structure */ 2495 curFile = bmake_malloc(sizeof *curFile); 2496 2497 /* 2498 * Once the previous state has been saved, we can get down to reading 2499 * the new file. We set up the name of the file to be the absolute 2500 * name of the include file so error messages refer to the right 2501 * place. 2502 */ 2503 curFile->fname = bmake_strdup(name); 2504 curFile->lineno = line; 2505 curFile->first_lineno = line; 2506 curFile->nextbuf = nextbuf; 2507 curFile->nextbuf_arg = arg; 2508 curFile->lf = NULL; 2509 curFile->depending = doing_depend; /* restore this on EOF */ 2510 2511 assert(nextbuf != NULL); 2512 2513 /* Get first block of input data */ 2514 buf = curFile->nextbuf(curFile->nextbuf_arg, &len); 2515 if (buf == NULL) { 2516 /* Was all a waste of time ... */ 2517 if (curFile->fname) 2518 free(curFile->fname); 2519 free(curFile); 2520 return; 2521 } 2522 curFile->P_str = buf; 2523 curFile->P_ptr = buf; 2524 curFile->P_end = buf+len; 2525 2526 curFile->cond_depth = Cond_save_depth(); 2527 ParseSetParseFile(name); 2528 } 2529 2530 /*- 2531 *----------------------------------------------------------------------- 2532 * IsInclude -- 2533 * Check if the line is an include directive 2534 * 2535 * Results: 2536 * TRUE if it is. 2537 * 2538 * Side Effects: 2539 * None 2540 * 2541 *----------------------------------------------------------------------- 2542 */ 2543 static Boolean 2544 IsInclude(const char *line, Boolean sysv) 2545 { 2546 static const char inc[] = "include"; 2547 static const size_t inclen = sizeof(inc) - 1; 2548 2549 // 'd' is not valid for sysv 2550 int o = strchr(&("ds-"[sysv]), *line) != NULL; 2551 2552 if (strncmp(line + o, inc, inclen) != 0) 2553 return FALSE; 2554 2555 // Space is not mandatory for BSD .include 2556 return !sysv || isspace((unsigned char)line[inclen + o]); 2557 } 2558 2559 2560 #ifdef SYSVINCLUDE 2561 /*- 2562 *----------------------------------------------------------------------- 2563 * IsSysVInclude -- 2564 * Check if the line is a SYSV include directive 2565 * 2566 * Results: 2567 * TRUE if it is. 2568 * 2569 * Side Effects: 2570 * None 2571 * 2572 *----------------------------------------------------------------------- 2573 */ 2574 static Boolean 2575 IsSysVInclude(const char *line) 2576 { 2577 const char *p; 2578 2579 if (!IsInclude(line, TRUE)) 2580 return FALSE; 2581 2582 /* Avoid interpeting a dependency line as an include */ 2583 for (p = line; (p = strchr(p, ':')) != NULL;) { 2584 if (*++p == '\0') { 2585 /* end of line -> dependency */ 2586 return FALSE; 2587 } 2588 if (*p == ':' || isspace((unsigned char)*p)) { 2589 /* :: operator or ': ' -> dependency */ 2590 return FALSE; 2591 } 2592 } 2593 return TRUE; 2594 } 2595 2596 /*- 2597 *--------------------------------------------------------------------- 2598 * ParseTraditionalInclude -- 2599 * Push to another file. 2600 * 2601 * The input is the current line. The file name(s) are 2602 * following the "include". 2603 * 2604 * Results: 2605 * None 2606 * 2607 * Side Effects: 2608 * A structure is added to the includes Lst and readProc, lineno, 2609 * fname and curFILE are altered for the new file 2610 *--------------------------------------------------------------------- 2611 */ 2612 static void 2613 ParseTraditionalInclude(char *line) 2614 { 2615 char *cp; /* current position in file spec */ 2616 int done = 0; 2617 int silent = (line[0] != 'i') ? 1 : 0; 2618 char *file = &line[silent + 7]; 2619 char *all_files; 2620 2621 if (DEBUG(PARSE)) { 2622 fprintf(debug_file, "%s: %s\n", __func__, file); 2623 } 2624 2625 /* 2626 * Skip over whitespace 2627 */ 2628 while (isspace((unsigned char)*file)) 2629 file++; 2630 2631 /* 2632 * Substitute for any variables in the file name before trying to 2633 * find the thing. 2634 */ 2635 all_files = Var_Subst(NULL, file, VAR_CMD, VARF_WANTRES); 2636 2637 if (*file == '\0') { 2638 Parse_Error(PARSE_FATAL, 2639 "Filename missing from \"include\""); 2640 goto out; 2641 } 2642 2643 for (file = all_files; !done; file = cp + 1) { 2644 /* Skip to end of line or next whitespace */ 2645 for (cp = file; *cp && !isspace((unsigned char) *cp); cp++) 2646 continue; 2647 2648 if (*cp) 2649 *cp = '\0'; 2650 else 2651 done = 1; 2652 2653 Parse_include_file(file, FALSE, FALSE, silent); 2654 } 2655 out: 2656 free(all_files); 2657 } 2658 #endif 2659 2660 #ifdef GMAKEEXPORT 2661 /*- 2662 *--------------------------------------------------------------------- 2663 * ParseGmakeExport -- 2664 * Parse export <variable>=<value> 2665 * 2666 * And set the environment with it. 2667 * 2668 * Results: 2669 * None 2670 * 2671 * Side Effects: 2672 * None 2673 *--------------------------------------------------------------------- 2674 */ 2675 static void 2676 ParseGmakeExport(char *line) 2677 { 2678 char *variable = &line[6]; 2679 char *value; 2680 2681 if (DEBUG(PARSE)) { 2682 fprintf(debug_file, "%s: %s\n", __func__, variable); 2683 } 2684 2685 /* 2686 * Skip over whitespace 2687 */ 2688 while (isspace((unsigned char)*variable)) 2689 variable++; 2690 2691 for (value = variable; *value && *value != '='; value++) 2692 continue; 2693 2694 if (*value != '=') { 2695 Parse_Error(PARSE_FATAL, 2696 "Variable/Value missing from \"export\""); 2697 return; 2698 } 2699 *value++ = '\0'; /* terminate variable */ 2700 2701 /* 2702 * Expand the value before putting it in the environment. 2703 */ 2704 value = Var_Subst(NULL, value, VAR_CMD, VARF_WANTRES); 2705 setenv(variable, value, 1); 2706 free(value); 2707 } 2708 #endif 2709 2710 /*- 2711 *--------------------------------------------------------------------- 2712 * ParseEOF -- 2713 * Called when EOF is reached in the current file. If we were reading 2714 * an include file, the includes stack is popped and things set up 2715 * to go back to reading the previous file at the previous location. 2716 * 2717 * Results: 2718 * CONTINUE if there's more to do. DONE if not. 2719 * 2720 * Side Effects: 2721 * The old curFILE, is closed. The includes list is shortened. 2722 * lineno, curFILE, and fname are changed if CONTINUE is returned. 2723 *--------------------------------------------------------------------- 2724 */ 2725 static int 2726 ParseEOF(void) 2727 { 2728 char *ptr; 2729 size_t len; 2730 2731 assert(curFile->nextbuf != NULL); 2732 2733 doing_depend = curFile->depending; /* restore this */ 2734 /* get next input buffer, if any */ 2735 ptr = curFile->nextbuf(curFile->nextbuf_arg, &len); 2736 curFile->P_ptr = ptr; 2737 curFile->P_str = ptr; 2738 curFile->P_end = ptr + len; 2739 curFile->lineno = curFile->first_lineno; 2740 if (ptr != NULL) { 2741 /* Iterate again */ 2742 return CONTINUE; 2743 } 2744 2745 /* Ensure the makefile (or loop) didn't have mismatched conditionals */ 2746 Cond_restore_depth(curFile->cond_depth); 2747 2748 if (curFile->lf != NULL) { 2749 loadedfile_destroy(curFile->lf); 2750 curFile->lf = NULL; 2751 } 2752 2753 /* Dispose of curFile info */ 2754 /* Leak curFile->fname because all the gnodes have pointers to it */ 2755 free(curFile->P_str); 2756 free(curFile); 2757 2758 curFile = Lst_DeQueue(includes); 2759 2760 if (curFile == NULL) { 2761 /* We've run out of input */ 2762 Var_Delete(".PARSEDIR", VAR_GLOBAL); 2763 Var_Delete(".PARSEFILE", VAR_GLOBAL); 2764 Var_Delete(".INCLUDEDFROMDIR", VAR_GLOBAL); 2765 Var_Delete(".INCLUDEDFROMFILE", VAR_GLOBAL); 2766 return DONE; 2767 } 2768 2769 if (DEBUG(PARSE)) 2770 fprintf(debug_file, "ParseEOF: returning to file %s, line %d\n", 2771 curFile->fname, curFile->lineno); 2772 2773 /* Restore the PARSEDIR/PARSEFILE variables */ 2774 ParseSetParseFile(curFile->fname); 2775 return CONTINUE; 2776 } 2777 2778 #define PARSE_RAW 1 2779 #define PARSE_SKIP 2 2780 2781 static char * 2782 ParseGetLine(int flags, int *length) 2783 { 2784 IFile *cf = curFile; 2785 char *ptr; 2786 char ch; 2787 char *line; 2788 char *line_end; 2789 char *escaped; 2790 char *comment; 2791 char *tp; 2792 2793 /* Loop through blank lines and comment lines */ 2794 for (;;) { 2795 cf->lineno++; 2796 line = cf->P_ptr; 2797 ptr = line; 2798 line_end = line; 2799 escaped = NULL; 2800 comment = NULL; 2801 for (;;) { 2802 if (cf->P_end != NULL && ptr == cf->P_end) { 2803 /* end of buffer */ 2804 ch = 0; 2805 break; 2806 } 2807 ch = *ptr; 2808 if (ch == 0 || (ch == '\\' && ptr[1] == 0)) { 2809 if (cf->P_end == NULL) 2810 /* End of string (aka for loop) data */ 2811 break; 2812 /* see if there is more we can parse */ 2813 while (ptr++ < cf->P_end) { 2814 if ((ch = *ptr) == '\n') { 2815 if (ptr > line && ptr[-1] == '\\') 2816 continue; 2817 Parse_Error(PARSE_WARNING, 2818 "Zero byte read from file, skipping rest of line."); 2819 break; 2820 } 2821 } 2822 if (cf->nextbuf != NULL) { 2823 /* 2824 * End of this buffer; return EOF and outer logic 2825 * will get the next one. (eww) 2826 */ 2827 break; 2828 } 2829 Parse_Error(PARSE_FATAL, "Zero byte read from file"); 2830 return NULL; 2831 } 2832 2833 if (ch == '\\') { 2834 /* Don't treat next character as special, remember first one */ 2835 if (escaped == NULL) 2836 escaped = ptr; 2837 if (ptr[1] == '\n') 2838 cf->lineno++; 2839 ptr += 2; 2840 line_end = ptr; 2841 continue; 2842 } 2843 if (ch == '#' && comment == NULL) { 2844 /* Remember first '#' for comment stripping */ 2845 /* Unless previous char was '[', as in modifier :[#] */ 2846 if (!(ptr > line && ptr[-1] == '[')) 2847 comment = line_end; 2848 } 2849 ptr++; 2850 if (ch == '\n') 2851 break; 2852 if (!isspace((unsigned char)ch)) 2853 /* We are not interested in trailing whitespace */ 2854 line_end = ptr; 2855 } 2856 2857 /* Save next 'to be processed' location */ 2858 cf->P_ptr = ptr; 2859 2860 /* Check we have a non-comment, non-blank line */ 2861 if (line_end == line || comment == line) { 2862 if (ch == 0) 2863 /* At end of file */ 2864 return NULL; 2865 /* Parse another line */ 2866 continue; 2867 } 2868 2869 /* We now have a line of data */ 2870 *line_end = 0; 2871 2872 if (flags & PARSE_RAW) { 2873 /* Leave '\' (etc) in line buffer (eg 'for' lines) */ 2874 *length = line_end - line; 2875 return line; 2876 } 2877 2878 if (flags & PARSE_SKIP) { 2879 /* Completely ignore non-directives */ 2880 if (line[0] != '.') 2881 continue; 2882 /* We could do more of the .else/.elif/.endif checks here */ 2883 } 2884 break; 2885 } 2886 2887 /* Brutally ignore anything after a non-escaped '#' in non-commands */ 2888 if (comment != NULL && line[0] != '\t') { 2889 line_end = comment; 2890 *line_end = 0; 2891 } 2892 2893 /* If we didn't see a '\\' then the in-situ data is fine */ 2894 if (escaped == NULL) { 2895 *length = line_end - line; 2896 return line; 2897 } 2898 2899 /* Remove escapes from '\n' and '#' */ 2900 tp = ptr = escaped; 2901 escaped = line; 2902 for (; ; *tp++ = ch) { 2903 ch = *ptr++; 2904 if (ch != '\\') { 2905 if (ch == 0) 2906 break; 2907 continue; 2908 } 2909 2910 ch = *ptr++; 2911 if (ch == 0) { 2912 /* Delete '\\' at end of buffer */ 2913 tp--; 2914 break; 2915 } 2916 2917 if (ch == '#' && line[0] != '\t') 2918 /* Delete '\\' from before '#' on non-command lines */ 2919 continue; 2920 2921 if (ch != '\n') { 2922 /* Leave '\\' in buffer for later */ 2923 *tp++ = '\\'; 2924 /* Make sure we don't delete an escaped ' ' from the line end */ 2925 escaped = tp + 1; 2926 continue; 2927 } 2928 2929 /* Escaped '\n' replace following whitespace with a single ' ' */ 2930 while (ptr[0] == ' ' || ptr[0] == '\t') 2931 ptr++; 2932 ch = ' '; 2933 } 2934 2935 /* Delete any trailing spaces - eg from empty continuations */ 2936 while (tp > escaped && isspace((unsigned char)tp[-1])) 2937 tp--; 2938 2939 *tp = 0; 2940 *length = tp - line; 2941 return line; 2942 } 2943 2944 /*- 2945 *--------------------------------------------------------------------- 2946 * ParseReadLine -- 2947 * Read an entire line from the input file. Called only by Parse_File. 2948 * 2949 * Results: 2950 * A line w/o its newline 2951 * 2952 * Side Effects: 2953 * Only those associated with reading a character 2954 *--------------------------------------------------------------------- 2955 */ 2956 static char * 2957 ParseReadLine(void) 2958 { 2959 char *line; /* Result */ 2960 int lineLength; /* Length of result */ 2961 int lineno; /* Saved line # */ 2962 int rval; 2963 2964 for (;;) { 2965 line = ParseGetLine(0, &lineLength); 2966 if (line == NULL) 2967 return NULL; 2968 2969 if (line[0] != '.') 2970 return line; 2971 2972 /* 2973 * The line might be a conditional. Ask the conditional module 2974 * about it and act accordingly 2975 */ 2976 switch (Cond_Eval(line)) { 2977 case COND_SKIP: 2978 /* Skip to next conditional that evaluates to COND_PARSE. */ 2979 do { 2980 line = ParseGetLine(PARSE_SKIP, &lineLength); 2981 } while (line && Cond_Eval(line) != COND_PARSE); 2982 if (line == NULL) 2983 break; 2984 continue; 2985 case COND_PARSE: 2986 continue; 2987 case COND_INVALID: /* Not a conditional line */ 2988 /* Check for .for loops */ 2989 rval = For_Eval(line); 2990 if (rval == 0) 2991 /* Not a .for line */ 2992 break; 2993 if (rval < 0) 2994 /* Syntax error - error printed, ignore line */ 2995 continue; 2996 /* Start of a .for loop */ 2997 lineno = curFile->lineno; 2998 /* Accumulate loop lines until matching .endfor */ 2999 do { 3000 line = ParseGetLine(PARSE_RAW, &lineLength); 3001 if (line == NULL) { 3002 Parse_Error(PARSE_FATAL, 3003 "Unexpected end of file in for loop."); 3004 break; 3005 } 3006 } while (For_Accum(line)); 3007 /* Stash each iteration as a new 'input file' */ 3008 For_Run(lineno); 3009 /* Read next line from for-loop buffer */ 3010 continue; 3011 } 3012 return line; 3013 } 3014 } 3015 3016 /*- 3017 *----------------------------------------------------------------------- 3018 * ParseFinishLine -- 3019 * Handle the end of a dependency group. 3020 * 3021 * Results: 3022 * Nothing. 3023 * 3024 * Side Effects: 3025 * inLine set FALSE. 'targets' list destroyed. 3026 * 3027 *----------------------------------------------------------------------- 3028 */ 3029 static void 3030 ParseFinishLine(void) 3031 { 3032 if (inLine) { 3033 Lst_ForEach(targets, Suff_EndTransform, NULL); 3034 Lst_Destroy(targets, ParseHasCommands); 3035 targets = NULL; 3036 inLine = FALSE; 3037 } 3038 } 3039 3040 3041 /*- 3042 *--------------------------------------------------------------------- 3043 * Parse_File -- 3044 * Parse a file into its component parts, incorporating it into the 3045 * current dependency graph. This is the main function and controls 3046 * almost every other function in this module 3047 * 3048 * Input: 3049 * name the name of the file being read 3050 * fd Open file to makefile to parse 3051 * 3052 * Results: 3053 * None 3054 * 3055 * Side Effects: 3056 * closes fd. 3057 * Loads. Nodes are added to the list of all targets, nodes and links 3058 * are added to the dependency graph. etc. etc. etc. 3059 *--------------------------------------------------------------------- 3060 */ 3061 void 3062 Parse_File(const char *name, int fd) 3063 { 3064 char *cp; /* pointer into the line */ 3065 char *line; /* the line we're working on */ 3066 struct loadedfile *lf; 3067 3068 lf = loadfile(name, fd); 3069 3070 inLine = FALSE; 3071 fatals = 0; 3072 3073 if (name == NULL) { 3074 name = "(stdin)"; 3075 } 3076 3077 Parse_SetInput(name, 0, -1, loadedfile_nextbuf, lf); 3078 curFile->lf = lf; 3079 3080 do { 3081 for (; (line = ParseReadLine()) != NULL; ) { 3082 if (DEBUG(PARSE)) 3083 fprintf(debug_file, "ParseReadLine (%d): '%s'\n", 3084 curFile->lineno, line); 3085 if (*line == '.') { 3086 /* 3087 * Lines that begin with the special character may be 3088 * include or undef directives. 3089 * On the other hand they can be suffix rules (.c.o: ...) 3090 * or just dependencies for filenames that start '.'. 3091 */ 3092 for (cp = line + 1; isspace((unsigned char)*cp); cp++) { 3093 continue; 3094 } 3095 if (IsInclude(cp, FALSE)) { 3096 ParseDoInclude(cp); 3097 continue; 3098 } 3099 if (strncmp(cp, "undef", 5) == 0) { 3100 char *cp2; 3101 for (cp += 5; isspace((unsigned char) *cp); cp++) 3102 continue; 3103 for (cp2 = cp; !isspace((unsigned char) *cp2) && 3104 (*cp2 != '\0'); cp2++) 3105 continue; 3106 *cp2 = '\0'; 3107 Var_Delete(cp, VAR_GLOBAL); 3108 continue; 3109 } else if (strncmp(cp, "export", 6) == 0) { 3110 for (cp += 6; isspace((unsigned char) *cp); cp++) 3111 continue; 3112 Var_Export(cp, 1); 3113 continue; 3114 } else if (strncmp(cp, "unexport", 8) == 0) { 3115 Var_UnExport(cp); 3116 continue; 3117 } else if (strncmp(cp, "info", 4) == 0 || 3118 strncmp(cp, "error", 5) == 0 || 3119 strncmp(cp, "warning", 7) == 0) { 3120 if (ParseMessage(cp)) 3121 continue; 3122 } 3123 } 3124 3125 if (*line == '\t') { 3126 /* 3127 * If a line starts with a tab, it can only hope to be 3128 * a creation command. 3129 */ 3130 cp = line + 1; 3131 shellCommand: 3132 for (; isspace ((unsigned char)*cp); cp++) { 3133 continue; 3134 } 3135 if (*cp) { 3136 if (!inLine) 3137 Parse_Error(PARSE_FATAL, 3138 "Unassociated shell command \"%s\"", 3139 cp); 3140 /* 3141 * So long as it's not a blank line and we're actually 3142 * in a dependency spec, add the command to the list of 3143 * commands of all targets in the dependency spec 3144 */ 3145 if (targets) { 3146 cp = bmake_strdup(cp); 3147 Lst_ForEach(targets, ParseAddCmd, cp); 3148 #ifdef CLEANUP 3149 Lst_AtEnd(targCmds, cp); 3150 #endif 3151 } 3152 } 3153 continue; 3154 } 3155 3156 #ifdef SYSVINCLUDE 3157 if (IsSysVInclude(line)) { 3158 /* 3159 * It's an S3/S5-style "include". 3160 */ 3161 ParseTraditionalInclude(line); 3162 continue; 3163 } 3164 #endif 3165 #ifdef GMAKEEXPORT 3166 if (strncmp(line, "export", 6) == 0 && 3167 isspace((unsigned char) line[6]) && 3168 strchr(line, ':') == NULL) { 3169 /* 3170 * It's a Gmake "export". 3171 */ 3172 ParseGmakeExport(line); 3173 continue; 3174 } 3175 #endif 3176 if (Parse_IsVar(line)) { 3177 ParseFinishLine(); 3178 Parse_DoVar(line, VAR_GLOBAL); 3179 continue; 3180 } 3181 3182 #ifndef POSIX 3183 /* 3184 * To make life easier on novices, if the line is indented we 3185 * first make sure the line has a dependency operator in it. 3186 * If it doesn't have an operator and we're in a dependency 3187 * line's script, we assume it's actually a shell command 3188 * and add it to the current list of targets. 3189 */ 3190 cp = line; 3191 if (isspace((unsigned char) line[0])) { 3192 while ((*cp != '\0') && isspace((unsigned char) *cp)) 3193 cp++; 3194 while (*cp && (ParseIsEscaped(line, cp) || 3195 (*cp != ':') && (*cp != '!'))) { 3196 cp++; 3197 } 3198 if (*cp == '\0') { 3199 if (inLine) { 3200 Parse_Error(PARSE_WARNING, 3201 "Shell command needs a leading tab"); 3202 goto shellCommand; 3203 } 3204 } 3205 } 3206 #endif 3207 ParseFinishLine(); 3208 3209 /* 3210 * For some reason - probably to make the parser impossible - 3211 * a ';' can be used to separate commands from dependencies. 3212 * Attempt to avoid ';' inside substitution patterns. 3213 */ 3214 { 3215 int level = 0; 3216 3217 for (cp = line; *cp != 0; cp++) { 3218 if (*cp == '\\' && cp[1] != 0) { 3219 cp++; 3220 continue; 3221 } 3222 if (*cp == '$' && 3223 (cp[1] == '(' || cp[1] == '{')) { 3224 level++; 3225 continue; 3226 } 3227 if (level > 0) { 3228 if (*cp == ')' || *cp == '}') { 3229 level--; 3230 continue; 3231 } 3232 } else if (*cp == ';') { 3233 break; 3234 } 3235 } 3236 } 3237 if (*cp != 0) 3238 /* Terminate the dependency list at the ';' */ 3239 *cp++ = 0; 3240 else 3241 cp = NULL; 3242 3243 /* 3244 * We now know it's a dependency line so it needs to have all 3245 * variables expanded before being parsed. Tell the variable 3246 * module to complain if some variable is undefined... 3247 */ 3248 line = Var_Subst(NULL, line, VAR_CMD, VARF_UNDEFERR|VARF_WANTRES); 3249 3250 /* 3251 * Need a non-circular list for the target nodes 3252 */ 3253 if (targets) 3254 Lst_Destroy(targets, NULL); 3255 3256 targets = Lst_Init(FALSE); 3257 inLine = TRUE; 3258 3259 ParseDoDependency(line); 3260 free(line); 3261 3262 /* If there were commands after a ';', add them now */ 3263 if (cp != NULL) { 3264 goto shellCommand; 3265 } 3266 } 3267 /* 3268 * Reached EOF, but it may be just EOF of an include file... 3269 */ 3270 } while (ParseEOF() == CONTINUE); 3271 3272 if (fatals) { 3273 (void)fflush(stdout); 3274 (void)fprintf(stderr, 3275 "%s: Fatal errors encountered -- cannot continue", 3276 progname); 3277 PrintOnError(NULL, NULL); 3278 exit(1); 3279 } 3280 } 3281 3282 /*- 3283 *--------------------------------------------------------------------- 3284 * Parse_Init -- 3285 * initialize the parsing module 3286 * 3287 * Results: 3288 * none 3289 * 3290 * Side Effects: 3291 * the parseIncPath list is initialized... 3292 *--------------------------------------------------------------------- 3293 */ 3294 void 3295 Parse_Init(void) 3296 { 3297 mainNode = NULL; 3298 parseIncPath = Lst_Init(FALSE); 3299 sysIncPath = Lst_Init(FALSE); 3300 defIncPath = Lst_Init(FALSE); 3301 includes = Lst_Init(FALSE); 3302 #ifdef CLEANUP 3303 targCmds = Lst_Init(FALSE); 3304 #endif 3305 } 3306 3307 void 3308 Parse_End(void) 3309 { 3310 #ifdef CLEANUP 3311 Lst_Destroy(targCmds, (FreeProc *)free); 3312 if (targets) 3313 Lst_Destroy(targets, NULL); 3314 Lst_Destroy(defIncPath, Dir_Destroy); 3315 Lst_Destroy(sysIncPath, Dir_Destroy); 3316 Lst_Destroy(parseIncPath, Dir_Destroy); 3317 Lst_Destroy(includes, NULL); /* Should be empty now */ 3318 #endif 3319 } 3320 3321 3322 /*- 3323 *----------------------------------------------------------------------- 3324 * Parse_MainName -- 3325 * Return a Lst of the main target to create for main()'s sake. If 3326 * no such target exists, we Punt with an obnoxious error message. 3327 * 3328 * Results: 3329 * A Lst of the single node to create. 3330 * 3331 * Side Effects: 3332 * None. 3333 * 3334 *----------------------------------------------------------------------- 3335 */ 3336 Lst 3337 Parse_MainName(void) 3338 { 3339 Lst mainList; /* result list */ 3340 3341 mainList = Lst_Init(FALSE); 3342 3343 if (mainNode == NULL) { 3344 Punt("no target to make."); 3345 /*NOTREACHED*/ 3346 } else if (mainNode->type & OP_DOUBLEDEP) { 3347 (void)Lst_AtEnd(mainList, mainNode); 3348 Lst_Concat(mainList, mainNode->cohorts, LST_CONCNEW); 3349 } 3350 else 3351 (void)Lst_AtEnd(mainList, mainNode); 3352 Var_Append(".TARGETS", mainNode->name, VAR_GLOBAL); 3353 return mainList; 3354 } 3355 3356 /*- 3357 *----------------------------------------------------------------------- 3358 * ParseMark -- 3359 * Add the filename and lineno to the GNode so that we remember 3360 * where it was first defined. 3361 * 3362 * Side Effects: 3363 * None. 3364 * 3365 *----------------------------------------------------------------------- 3366 */ 3367 static void 3368 ParseMark(GNode *gn) 3369 { 3370 gn->fname = curFile->fname; 3371 gn->lineno = curFile->lineno; 3372 } 3373