parse.c revision 1.232
1 /* $NetBSD: parse.c,v 1.232 2019/04/09 18:28:10 sjg Exp $ */ 2 3 /* 4 * Copyright (c) 1988, 1989, 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Adam de Boor. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 /* 36 * Copyright (c) 1989 by Berkeley Softworks 37 * All rights reserved. 38 * 39 * This code is derived from software contributed to Berkeley by 40 * Adam de Boor. 41 * 42 * Redistribution and use in source and binary forms, with or without 43 * modification, are permitted provided that the following conditions 44 * are met: 45 * 1. Redistributions of source code must retain the above copyright 46 * notice, this list of conditions and the following disclaimer. 47 * 2. Redistributions in binary form must reproduce the above copyright 48 * notice, this list of conditions and the following disclaimer in the 49 * documentation and/or other materials provided with the distribution. 50 * 3. All advertising materials mentioning features or use of this software 51 * must display the following acknowledgement: 52 * This product includes software developed by the University of 53 * California, Berkeley and its contributors. 54 * 4. Neither the name of the University nor the names of its contributors 55 * may be used to endorse or promote products derived from this software 56 * without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 68 * SUCH DAMAGE. 69 */ 70 71 #ifndef MAKE_NATIVE 72 static char rcsid[] = "$NetBSD: parse.c,v 1.232 2019/04/09 18:28:10 sjg Exp $"; 73 #else 74 #include <sys/cdefs.h> 75 #ifndef lint 76 #if 0 77 static char sccsid[] = "@(#)parse.c 8.3 (Berkeley) 3/19/94"; 78 #else 79 __RCSID("$NetBSD: parse.c,v 1.232 2019/04/09 18:28:10 sjg Exp $"); 80 #endif 81 #endif /* not lint */ 82 #endif 83 84 /*- 85 * parse.c -- 86 * Functions to parse a makefile. 87 * 88 * One function, Parse_Init, must be called before any functions 89 * in this module are used. After that, the function Parse_File is the 90 * main entry point and controls most of the other functions in this 91 * module. 92 * 93 * Most important structures are kept in Lsts. Directories for 94 * the .include "..." function are kept in the 'parseIncPath' Lst, while 95 * those for the .include <...> are kept in the 'sysIncPath' Lst. The 96 * targets currently being defined are kept in the 'targets' Lst. 97 * 98 * The variables 'fname' and 'lineno' are used to track the name 99 * of the current file and the line number in that file so that error 100 * messages can be more meaningful. 101 * 102 * Interface: 103 * Parse_Init Initialization function which must be 104 * called before anything else in this module 105 * is used. 106 * 107 * Parse_End Cleanup the module 108 * 109 * Parse_File Function used to parse a makefile. It must 110 * be given the name of the file, which should 111 * already have been opened, and a function 112 * to call to read a character from the file. 113 * 114 * Parse_IsVar Returns TRUE if the given line is a 115 * variable assignment. Used by MainParseArgs 116 * to determine if an argument is a target 117 * or a variable assignment. Used internally 118 * for pretty much the same thing... 119 * 120 * Parse_Error Function called when an error occurs in 121 * parsing. Used by the variable and 122 * conditional modules. 123 * Parse_MainName Returns a Lst of the main target to create. 124 */ 125 126 #include <sys/types.h> 127 #include <sys/mman.h> 128 #include <sys/stat.h> 129 #include <assert.h> 130 #include <ctype.h> 131 #include <errno.h> 132 #include <stdarg.h> 133 #include <stdio.h> 134 #include <stdint.h> 135 136 #ifndef MAP_FILE 137 #define MAP_FILE 0 138 #endif 139 #ifndef MAP_COPY 140 #define MAP_COPY MAP_PRIVATE 141 #endif 142 143 #include "make.h" 144 #include "hash.h" 145 #include "dir.h" 146 #include "job.h" 147 #include "buf.h" 148 #include "pathnames.h" 149 150 //////////////////////////////////////////////////////////// 151 // types and constants 152 153 /* 154 * Structure for a file being read ("included file") 155 */ 156 typedef struct IFile { 157 char *fname; /* name of file */ 158 int lineno; /* current line number in file */ 159 int first_lineno; /* line number of start of text */ 160 int cond_depth; /* 'if' nesting when file opened */ 161 Boolean depending; /* state of doing_depend on EOF */ 162 char *P_str; /* point to base of string buffer */ 163 char *P_ptr; /* point to next char of string buffer */ 164 char *P_end; /* point to the end of string buffer */ 165 char *(*nextbuf)(void *, size_t *); /* Function to get more data */ 166 void *nextbuf_arg; /* Opaque arg for nextbuf() */ 167 struct loadedfile *lf; /* loadedfile object, if any */ 168 } IFile; 169 170 171 /* 172 * These values are returned by ParseEOF to tell Parse_File whether to 173 * CONTINUE parsing, i.e. it had only reached the end of an include file, 174 * or if it's DONE. 175 */ 176 #define CONTINUE 1 177 #define DONE 0 178 179 /* 180 * Tokens for target attributes 181 */ 182 typedef enum { 183 Begin, /* .BEGIN */ 184 Default, /* .DEFAULT */ 185 DeleteOnError, /* .DELETE_ON_ERROR */ 186 End, /* .END */ 187 dotError, /* .ERROR */ 188 Ignore, /* .IGNORE */ 189 Includes, /* .INCLUDES */ 190 Interrupt, /* .INTERRUPT */ 191 Libs, /* .LIBS */ 192 Meta, /* .META */ 193 MFlags, /* .MFLAGS or .MAKEFLAGS */ 194 Main, /* .MAIN and we don't have anything user-specified to 195 * make */ 196 NoExport, /* .NOEXPORT */ 197 NoMeta, /* .NOMETA */ 198 NoMetaCmp, /* .NOMETA_CMP */ 199 NoPath, /* .NOPATH */ 200 Not, /* Not special */ 201 NotParallel, /* .NOTPARALLEL */ 202 Null, /* .NULL */ 203 ExObjdir, /* .OBJDIR */ 204 Order, /* .ORDER */ 205 Parallel, /* .PARALLEL */ 206 ExPath, /* .PATH */ 207 Phony, /* .PHONY */ 208 #ifdef POSIX 209 Posix, /* .POSIX */ 210 #endif 211 Precious, /* .PRECIOUS */ 212 ExShell, /* .SHELL */ 213 Silent, /* .SILENT */ 214 SingleShell, /* .SINGLESHELL */ 215 Stale, /* .STALE */ 216 Suffixes, /* .SUFFIXES */ 217 Wait, /* .WAIT */ 218 Attribute /* Generic attribute */ 219 } ParseSpecial; 220 221 /* 222 * Other tokens 223 */ 224 #define LPAREN '(' 225 #define RPAREN ')' 226 227 228 //////////////////////////////////////////////////////////// 229 // result data 230 231 /* 232 * The main target to create. This is the first target on the first 233 * dependency line in the first makefile. 234 */ 235 static GNode *mainNode; 236 237 //////////////////////////////////////////////////////////// 238 // eval state 239 240 /* targets we're working on */ 241 static Lst targets; 242 243 #ifdef CLEANUP 244 /* command lines for targets */ 245 static Lst targCmds; 246 #endif 247 248 /* 249 * specType contains the SPECial TYPE of the current target. It is 250 * Not if the target is unspecial. If it *is* special, however, the children 251 * are linked as children of the parent but not vice versa. This variable is 252 * set in ParseDoDependency 253 */ 254 static ParseSpecial specType; 255 256 /* 257 * Predecessor node for handling .ORDER. Initialized to NULL when .ORDER 258 * seen, then set to each successive source on the line. 259 */ 260 static GNode *predecessor; 261 262 //////////////////////////////////////////////////////////// 263 // parser state 264 265 /* true if currently in a dependency line or its commands */ 266 static Boolean inLine; 267 268 /* number of fatal errors */ 269 static int fatals = 0; 270 271 /* 272 * Variables for doing includes 273 */ 274 275 /* current file being read */ 276 static IFile *curFile; 277 278 /* stack of IFiles generated by .includes */ 279 static Lst includes; 280 281 /* include paths (lists of directories) */ 282 Lst parseIncPath; /* dirs for "..." includes */ 283 Lst sysIncPath; /* dirs for <...> includes */ 284 Lst defIncPath; /* default for sysIncPath */ 285 286 //////////////////////////////////////////////////////////// 287 // parser tables 288 289 /* 290 * The parseKeywords table is searched using binary search when deciding 291 * if a target or source is special. The 'spec' field is the ParseSpecial 292 * type of the keyword ("Not" if the keyword isn't special as a target) while 293 * the 'op' field is the operator to apply to the list of targets if the 294 * keyword is used as a source ("0" if the keyword isn't special as a source) 295 */ 296 static const struct { 297 const char *name; /* Name of keyword */ 298 ParseSpecial spec; /* Type when used as a target */ 299 int op; /* Operator when used as a source */ 300 } parseKeywords[] = { 301 { ".BEGIN", Begin, 0 }, 302 { ".DEFAULT", Default, 0 }, 303 { ".DELETE_ON_ERROR", DeleteOnError, 0 }, 304 { ".END", End, 0 }, 305 { ".ERROR", dotError, 0 }, 306 { ".EXEC", Attribute, OP_EXEC }, 307 { ".IGNORE", Ignore, OP_IGNORE }, 308 { ".INCLUDES", Includes, 0 }, 309 { ".INTERRUPT", Interrupt, 0 }, 310 { ".INVISIBLE", Attribute, OP_INVISIBLE }, 311 { ".JOIN", Attribute, OP_JOIN }, 312 { ".LIBS", Libs, 0 }, 313 { ".MADE", Attribute, OP_MADE }, 314 { ".MAIN", Main, 0 }, 315 { ".MAKE", Attribute, OP_MAKE }, 316 { ".MAKEFLAGS", MFlags, 0 }, 317 { ".META", Meta, OP_META }, 318 { ".MFLAGS", MFlags, 0 }, 319 { ".NOMETA", NoMeta, OP_NOMETA }, 320 { ".NOMETA_CMP", NoMetaCmp, OP_NOMETA_CMP }, 321 { ".NOPATH", NoPath, OP_NOPATH }, 322 { ".NOTMAIN", Attribute, OP_NOTMAIN }, 323 { ".NOTPARALLEL", NotParallel, 0 }, 324 { ".NO_PARALLEL", NotParallel, 0 }, 325 { ".NULL", Null, 0 }, 326 { ".OBJDIR", ExObjdir, 0 }, 327 { ".OPTIONAL", Attribute, OP_OPTIONAL }, 328 { ".ORDER", Order, 0 }, 329 { ".PARALLEL", Parallel, 0 }, 330 { ".PATH", ExPath, 0 }, 331 { ".PHONY", Phony, OP_PHONY }, 332 #ifdef POSIX 333 { ".POSIX", Posix, 0 }, 334 #endif 335 { ".PRECIOUS", Precious, OP_PRECIOUS }, 336 { ".RECURSIVE", Attribute, OP_MAKE }, 337 { ".SHELL", ExShell, 0 }, 338 { ".SILENT", Silent, OP_SILENT }, 339 { ".SINGLESHELL", SingleShell, 0 }, 340 { ".STALE", Stale, 0 }, 341 { ".SUFFIXES", Suffixes, 0 }, 342 { ".USE", Attribute, OP_USE }, 343 { ".USEBEFORE", Attribute, OP_USEBEFORE }, 344 { ".WAIT", Wait, 0 }, 345 }; 346 347 //////////////////////////////////////////////////////////// 348 // local functions 349 350 static int ParseIsEscaped(const char *, const char *); 351 static void ParseErrorInternal(const char *, size_t, int, const char *, ...) 352 MAKE_ATTR_PRINTFLIKE(4,5); 353 static void ParseVErrorInternal(FILE *, const char *, size_t, int, const char *, va_list) 354 MAKE_ATTR_PRINTFLIKE(5, 0); 355 static int ParseFindKeyword(const char *); 356 static int ParseLinkSrc(void *, void *); 357 static int ParseDoOp(void *, void *); 358 static void ParseDoSrc(int, const char *); 359 static int ParseFindMain(void *, void *); 360 static int ParseAddDir(void *, void *); 361 static int ParseClearPath(void *, void *); 362 static void ParseDoDependency(char *); 363 static int ParseAddCmd(void *, void *); 364 static void ParseHasCommands(void *); 365 static void ParseDoInclude(char *); 366 static void ParseSetParseFile(const char *); 367 static void ParseSetIncludedFile(void); 368 #ifdef GMAKEEXPORT 369 static void ParseGmakeExport(char *); 370 #endif 371 static int ParseEOF(void); 372 static char *ParseReadLine(void); 373 static void ParseFinishLine(void); 374 static void ParseMark(GNode *); 375 376 //////////////////////////////////////////////////////////// 377 // file loader 378 379 struct loadedfile { 380 const char *path; /* name, for error reports */ 381 char *buf; /* contents buffer */ 382 size_t len; /* length of contents */ 383 size_t maplen; /* length of mmap area, or 0 */ 384 Boolean used; /* XXX: have we used the data yet */ 385 }; 386 387 /* 388 * Constructor/destructor for loadedfile 389 */ 390 static struct loadedfile * 391 loadedfile_create(const char *path) 392 { 393 struct loadedfile *lf; 394 395 lf = bmake_malloc(sizeof(*lf)); 396 lf->path = (path == NULL ? "(stdin)" : path); 397 lf->buf = NULL; 398 lf->len = 0; 399 lf->maplen = 0; 400 lf->used = FALSE; 401 return lf; 402 } 403 404 static void 405 loadedfile_destroy(struct loadedfile *lf) 406 { 407 if (lf->buf != NULL) { 408 if (lf->maplen > 0) { 409 munmap(lf->buf, lf->maplen); 410 } else { 411 free(lf->buf); 412 } 413 } 414 free(lf); 415 } 416 417 /* 418 * nextbuf() operation for loadedfile, as needed by the weird and twisted 419 * logic below. Once that's cleaned up, we can get rid of lf->used... 420 */ 421 static char * 422 loadedfile_nextbuf(void *x, size_t *len) 423 { 424 struct loadedfile *lf = x; 425 426 if (lf->used) { 427 return NULL; 428 } 429 lf->used = TRUE; 430 *len = lf->len; 431 return lf->buf; 432 } 433 434 /* 435 * Try to get the size of a file. 436 */ 437 static ReturnStatus 438 load_getsize(int fd, size_t *ret) 439 { 440 struct stat st; 441 442 if (fstat(fd, &st) < 0) { 443 return FAILURE; 444 } 445 446 if (!S_ISREG(st.st_mode)) { 447 return FAILURE; 448 } 449 450 /* 451 * st_size is an off_t, which is 64 bits signed; *ret is 452 * size_t, which might be 32 bits unsigned or 64 bits 453 * unsigned. Rather than being elaborate, just punt on 454 * files that are more than 2^31 bytes. We should never 455 * see a makefile that size in practice... 456 * 457 * While we're at it reject negative sizes too, just in case. 458 */ 459 if (st.st_size < 0 || st.st_size > 0x7fffffff) { 460 return FAILURE; 461 } 462 463 *ret = (size_t) st.st_size; 464 return SUCCESS; 465 } 466 467 /* 468 * Read in a file. 469 * 470 * Until the path search logic can be moved under here instead of 471 * being in the caller in another source file, we need to have the fd 472 * passed in already open. Bleh. 473 * 474 * If the path is NULL use stdin and (to insure against fd leaks) 475 * assert that the caller passed in -1. 476 */ 477 static struct loadedfile * 478 loadfile(const char *path, int fd) 479 { 480 struct loadedfile *lf; 481 static long pagesize = 0; 482 ssize_t result; 483 size_t bufpos; 484 485 lf = loadedfile_create(path); 486 487 if (path == NULL) { 488 assert(fd == -1); 489 fd = STDIN_FILENO; 490 } else { 491 #if 0 /* notyet */ 492 fd = open(path, O_RDONLY); 493 if (fd < 0) { 494 ... 495 Error("%s: %s", path, strerror(errno)); 496 exit(1); 497 } 498 #endif 499 } 500 501 if (load_getsize(fd, &lf->len) == SUCCESS) { 502 /* found a size, try mmap */ 503 if (pagesize == 0) 504 pagesize = sysconf(_SC_PAGESIZE); 505 if (pagesize <= 0) { 506 pagesize = 0x1000; 507 } 508 /* round size up to a page */ 509 lf->maplen = pagesize * ((lf->len + pagesize - 1)/pagesize); 510 511 /* 512 * XXX hack for dealing with empty files; remove when 513 * we're no longer limited by interfacing to the old 514 * logic elsewhere in this file. 515 */ 516 if (lf->maplen == 0) { 517 lf->maplen = pagesize; 518 } 519 520 /* 521 * FUTURE: remove PROT_WRITE when the parser no longer 522 * needs to scribble on the input. 523 */ 524 lf->buf = mmap(NULL, lf->maplen, PROT_READ|PROT_WRITE, 525 MAP_FILE|MAP_COPY, fd, 0); 526 if (lf->buf != MAP_FAILED) { 527 /* succeeded */ 528 if (lf->len == lf->maplen && lf->buf[lf->len - 1] != '\n') { 529 char *b = bmake_malloc(lf->len + 1); 530 b[lf->len] = '\n'; 531 memcpy(b, lf->buf, lf->len++); 532 munmap(lf->buf, lf->maplen); 533 lf->maplen = 0; 534 lf->buf = b; 535 } 536 goto done; 537 } 538 } 539 540 /* cannot mmap; load the traditional way */ 541 542 lf->maplen = 0; 543 lf->len = 1024; 544 lf->buf = bmake_malloc(lf->len); 545 546 bufpos = 0; 547 while (1) { 548 assert(bufpos <= lf->len); 549 if (bufpos == lf->len) { 550 if (lf->len > SIZE_MAX/2) { 551 errno = EFBIG; 552 Error("%s: file too large", path); 553 exit(1); 554 } 555 lf->len *= 2; 556 lf->buf = bmake_realloc(lf->buf, lf->len); 557 } 558 assert(bufpos < lf->len); 559 result = read(fd, lf->buf + bufpos, lf->len - bufpos); 560 if (result < 0) { 561 Error("%s: read error: %s", path, strerror(errno)); 562 exit(1); 563 } 564 if (result == 0) { 565 break; 566 } 567 bufpos += result; 568 } 569 assert(bufpos <= lf->len); 570 lf->len = bufpos; 571 572 /* truncate malloc region to actual length (maybe not useful) */ 573 if (lf->len > 0) { 574 /* as for mmap case, ensure trailing \n */ 575 if (lf->buf[lf->len - 1] != '\n') 576 lf->len++; 577 lf->buf = bmake_realloc(lf->buf, lf->len); 578 lf->buf[lf->len - 1] = '\n'; 579 } 580 581 done: 582 if (path != NULL) { 583 close(fd); 584 } 585 return lf; 586 } 587 588 //////////////////////////////////////////////////////////// 589 // old code 590 591 /*- 592 *---------------------------------------------------------------------- 593 * ParseIsEscaped -- 594 * Check if the current character is escaped on the current line 595 * 596 * Results: 597 * 0 if the character is not backslash escaped, 1 otherwise 598 * 599 * Side Effects: 600 * None 601 *---------------------------------------------------------------------- 602 */ 603 static int 604 ParseIsEscaped(const char *line, const char *c) 605 { 606 int active = 0; 607 for (;;) { 608 if (line == c) 609 return active; 610 if (*--c != '\\') 611 return active; 612 active = !active; 613 } 614 } 615 616 /*- 617 *---------------------------------------------------------------------- 618 * ParseFindKeyword -- 619 * Look in the table of keywords for one matching the given string. 620 * 621 * Input: 622 * str String to find 623 * 624 * Results: 625 * The index of the keyword, or -1 if it isn't there. 626 * 627 * Side Effects: 628 * None 629 *---------------------------------------------------------------------- 630 */ 631 static int 632 ParseFindKeyword(const char *str) 633 { 634 int start, end, cur; 635 int diff; 636 637 start = 0; 638 end = (sizeof(parseKeywords)/sizeof(parseKeywords[0])) - 1; 639 640 do { 641 cur = start + ((end - start) / 2); 642 diff = strcmp(str, parseKeywords[cur].name); 643 644 if (diff == 0) { 645 return (cur); 646 } else if (diff < 0) { 647 end = cur - 1; 648 } else { 649 start = cur + 1; 650 } 651 } while (start <= end); 652 return (-1); 653 } 654 655 /*- 656 * ParseVErrorInternal -- 657 * Error message abort function for parsing. Prints out the context 658 * of the error (line number and file) as well as the message with 659 * two optional arguments. 660 * 661 * Results: 662 * None 663 * 664 * Side Effects: 665 * "fatals" is incremented if the level is PARSE_FATAL. 666 */ 667 /* VARARGS */ 668 static void 669 ParseVErrorInternal(FILE *f, const char *cfname, size_t clineno, int type, 670 const char *fmt, va_list ap) 671 { 672 static Boolean fatal_warning_error_printed = FALSE; 673 674 (void)fprintf(f, "%s: ", progname); 675 676 if (cfname != NULL) { 677 (void)fprintf(f, "\""); 678 if (*cfname != '/' && strcmp(cfname, "(stdin)") != 0) { 679 char *cp, *cp2; 680 const char *dir, *fname; 681 682 /* 683 * Nothing is more annoying than not knowing 684 * which Makefile is the culprit; we try ${.PARSEDIR} 685 * and apply realpath(3) if not absolute. 686 */ 687 dir = Var_Value(".PARSEDIR", VAR_GLOBAL, &cp); 688 if (dir == NULL) 689 dir = "."; 690 if (*dir != '/') { 691 dir = cp2 = realpath(dir, NULL); 692 free(cp); 693 cp = cp2; /* cp2 set to NULL by Var_Value */ 694 } 695 fname = Var_Value(".PARSEFILE", VAR_GLOBAL, &cp2); 696 if (fname == NULL) { 697 if ((fname = strrchr(cfname, '/'))) 698 fname++; 699 else 700 fname = cfname; 701 } 702 (void)fprintf(f, "%s/%s", dir, fname); 703 free(cp2); 704 free(cp); 705 } else 706 (void)fprintf(f, "%s", cfname); 707 708 (void)fprintf(f, "\" line %d: ", (int)clineno); 709 } 710 if (type == PARSE_WARNING) 711 (void)fprintf(f, "warning: "); 712 (void)vfprintf(f, fmt, ap); 713 (void)fprintf(f, "\n"); 714 (void)fflush(f); 715 if (type == PARSE_INFO) 716 return; 717 if (type == PARSE_FATAL || parseWarnFatal) 718 fatals += 1; 719 if (parseWarnFatal && !fatal_warning_error_printed) { 720 Error("parsing warnings being treated as errors"); 721 fatal_warning_error_printed = TRUE; 722 } 723 } 724 725 /*- 726 * ParseErrorInternal -- 727 * Error function 728 * 729 * Results: 730 * None 731 * 732 * Side Effects: 733 * None 734 */ 735 /* VARARGS */ 736 static void 737 ParseErrorInternal(const char *cfname, size_t clineno, int type, 738 const char *fmt, ...) 739 { 740 va_list ap; 741 742 va_start(ap, fmt); 743 (void)fflush(stdout); 744 ParseVErrorInternal(stderr, cfname, clineno, type, fmt, ap); 745 va_end(ap); 746 747 if (debug_file != stderr && debug_file != stdout) { 748 va_start(ap, fmt); 749 ParseVErrorInternal(debug_file, cfname, clineno, type, fmt, ap); 750 va_end(ap); 751 } 752 } 753 754 /*- 755 * Parse_Error -- 756 * External interface to ParseErrorInternal; uses the default filename 757 * Line number. 758 * 759 * Results: 760 * None 761 * 762 * Side Effects: 763 * None 764 */ 765 /* VARARGS */ 766 void 767 Parse_Error(int type, const char *fmt, ...) 768 { 769 va_list ap; 770 const char *fname; 771 size_t lineno; 772 773 if (curFile == NULL) { 774 fname = NULL; 775 lineno = 0; 776 } else { 777 fname = curFile->fname; 778 lineno = curFile->lineno; 779 } 780 781 va_start(ap, fmt); 782 (void)fflush(stdout); 783 ParseVErrorInternal(stderr, fname, lineno, type, fmt, ap); 784 va_end(ap); 785 786 if (debug_file != stderr && debug_file != stdout) { 787 va_start(ap, fmt); 788 ParseVErrorInternal(debug_file, fname, lineno, type, fmt, ap); 789 va_end(ap); 790 } 791 } 792 793 794 /* 795 * ParseMessage 796 * Parse a .info .warning or .error directive 797 * 798 * The input is the line minus the ".". We substitute 799 * variables, print the message and exit(1) (for .error) or just print 800 * a warning if the directive is malformed. 801 */ 802 static Boolean 803 ParseMessage(char *line) 804 { 805 int mtype; 806 807 switch(*line) { 808 case 'i': 809 mtype = PARSE_INFO; 810 break; 811 case 'w': 812 mtype = PARSE_WARNING; 813 break; 814 case 'e': 815 mtype = PARSE_FATAL; 816 break; 817 default: 818 Parse_Error(PARSE_WARNING, "invalid syntax: \".%s\"", line); 819 return FALSE; 820 } 821 822 while (isalpha((unsigned char)*line)) 823 line++; 824 if (!isspace((unsigned char)*line)) 825 return FALSE; /* not for us */ 826 while (isspace((unsigned char)*line)) 827 line++; 828 829 line = Var_Subst(NULL, line, VAR_CMD, VARF_WANTRES); 830 Parse_Error(mtype, "%s", line); 831 free(line); 832 833 if (mtype == PARSE_FATAL) { 834 /* Terminate immediately. */ 835 exit(1); 836 } 837 return TRUE; 838 } 839 840 /*- 841 *--------------------------------------------------------------------- 842 * ParseLinkSrc -- 843 * Link the parent node to its new child. Used in a Lst_ForEach by 844 * ParseDoDependency. If the specType isn't 'Not', the parent 845 * isn't linked as a parent of the child. 846 * 847 * Input: 848 * pgnp The parent node 849 * cgpn The child node 850 * 851 * Results: 852 * Always = 0 853 * 854 * Side Effects: 855 * New elements are added to the parents list of cgn and the 856 * children list of cgn. the unmade field of pgn is updated 857 * to reflect the additional child. 858 *--------------------------------------------------------------------- 859 */ 860 static int 861 ParseLinkSrc(void *pgnp, void *cgnp) 862 { 863 GNode *pgn = (GNode *)pgnp; 864 GNode *cgn = (GNode *)cgnp; 865 866 if ((pgn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (pgn->cohorts)) 867 pgn = (GNode *)Lst_Datum(Lst_Last(pgn->cohorts)); 868 (void)Lst_AtEnd(pgn->children, cgn); 869 if (specType == Not) 870 (void)Lst_AtEnd(cgn->parents, pgn); 871 pgn->unmade += 1; 872 if (DEBUG(PARSE)) { 873 fprintf(debug_file, "# %s: added child %s - %s\n", __func__, 874 pgn->name, cgn->name); 875 Targ_PrintNode(pgn, 0); 876 Targ_PrintNode(cgn, 0); 877 } 878 return (0); 879 } 880 881 /*- 882 *--------------------------------------------------------------------- 883 * ParseDoOp -- 884 * Apply the parsed operator to the given target node. Used in a 885 * Lst_ForEach call by ParseDoDependency once all targets have 886 * been found and their operator parsed. If the previous and new 887 * operators are incompatible, a major error is taken. 888 * 889 * Input: 890 * gnp The node to which the operator is to be applied 891 * opp The operator to apply 892 * 893 * Results: 894 * Always 0 895 * 896 * Side Effects: 897 * The type field of the node is altered to reflect any new bits in 898 * the op. 899 *--------------------------------------------------------------------- 900 */ 901 static int 902 ParseDoOp(void *gnp, void *opp) 903 { 904 GNode *gn = (GNode *)gnp; 905 int op = *(int *)opp; 906 /* 907 * If the dependency mask of the operator and the node don't match and 908 * the node has actually had an operator applied to it before, and 909 * the operator actually has some dependency information in it, complain. 910 */ 911 if (((op & OP_OPMASK) != (gn->type & OP_OPMASK)) && 912 !OP_NOP(gn->type) && !OP_NOP(op)) 913 { 914 Parse_Error(PARSE_FATAL, "Inconsistent operator for %s", gn->name); 915 return (1); 916 } 917 918 if ((op == OP_DOUBLEDEP) && ((gn->type & OP_OPMASK) == OP_DOUBLEDEP)) { 919 /* 920 * If the node was the object of a :: operator, we need to create a 921 * new instance of it for the children and commands on this dependency 922 * line. The new instance is placed on the 'cohorts' list of the 923 * initial one (note the initial one is not on its own cohorts list) 924 * and the new instance is linked to all parents of the initial 925 * instance. 926 */ 927 GNode *cohort; 928 929 /* 930 * Propagate copied bits to the initial node. They'll be propagated 931 * back to the rest of the cohorts later. 932 */ 933 gn->type |= op & ~OP_OPMASK; 934 935 cohort = Targ_FindNode(gn->name, TARG_NOHASH); 936 if (doing_depend) 937 ParseMark(cohort); 938 /* 939 * Make the cohort invisible as well to avoid duplicating it into 940 * other variables. True, parents of this target won't tend to do 941 * anything with their local variables, but better safe than 942 * sorry. (I think this is pointless now, since the relevant list 943 * traversals will no longer see this node anyway. -mycroft) 944 */ 945 cohort->type = op | OP_INVISIBLE; 946 (void)Lst_AtEnd(gn->cohorts, cohort); 947 cohort->centurion = gn; 948 gn->unmade_cohorts += 1; 949 snprintf(cohort->cohort_num, sizeof cohort->cohort_num, "#%d", 950 gn->unmade_cohorts); 951 } else { 952 /* 953 * We don't want to nuke any previous flags (whatever they were) so we 954 * just OR the new operator into the old 955 */ 956 gn->type |= op; 957 } 958 959 return (0); 960 } 961 962 /*- 963 *--------------------------------------------------------------------- 964 * ParseDoSrc -- 965 * Given the name of a source, figure out if it is an attribute 966 * and apply it to the targets if it is. Else decide if there is 967 * some attribute which should be applied *to* the source because 968 * of some special target and apply it if so. Otherwise, make the 969 * source be a child of the targets in the list 'targets' 970 * 971 * Input: 972 * tOp operator (if any) from special targets 973 * src name of the source to handle 974 * 975 * Results: 976 * None 977 * 978 * Side Effects: 979 * Operator bits may be added to the list of targets or to the source. 980 * The targets may have a new source added to their lists of children. 981 *--------------------------------------------------------------------- 982 */ 983 static void 984 ParseDoSrc(int tOp, const char *src) 985 { 986 GNode *gn = NULL; 987 static int wait_number = 0; 988 char wait_src[16]; 989 990 if (*src == '.' && isupper ((unsigned char)src[1])) { 991 int keywd = ParseFindKeyword(src); 992 if (keywd != -1) { 993 int op = parseKeywords[keywd].op; 994 if (op != 0) { 995 Lst_ForEach(targets, ParseDoOp, &op); 996 return; 997 } 998 if (parseKeywords[keywd].spec == Wait) { 999 /* 1000 * We add a .WAIT node in the dependency list. 1001 * After any dynamic dependencies (and filename globbing) 1002 * have happened, it is given a dependency on the each 1003 * previous child back to and previous .WAIT node. 1004 * The next child won't be scheduled until the .WAIT node 1005 * is built. 1006 * We give each .WAIT node a unique name (mainly for diag). 1007 */ 1008 snprintf(wait_src, sizeof wait_src, ".WAIT_%u", ++wait_number); 1009 gn = Targ_FindNode(wait_src, TARG_NOHASH); 1010 if (doing_depend) 1011 ParseMark(gn); 1012 gn->type = OP_WAIT | OP_PHONY | OP_DEPENDS | OP_NOTMAIN; 1013 Lst_ForEach(targets, ParseLinkSrc, gn); 1014 return; 1015 } 1016 } 1017 } 1018 1019 switch (specType) { 1020 case Main: 1021 /* 1022 * If we have noted the existence of a .MAIN, it means we need 1023 * to add the sources of said target to the list of things 1024 * to create. The string 'src' is likely to be free, so we 1025 * must make a new copy of it. Note that this will only be 1026 * invoked if the user didn't specify a target on the command 1027 * line. This is to allow #ifmake's to succeed, or something... 1028 */ 1029 (void)Lst_AtEnd(create, bmake_strdup(src)); 1030 /* 1031 * Add the name to the .TARGETS variable as well, so the user can 1032 * employ that, if desired. 1033 */ 1034 Var_Append(".TARGETS", src, VAR_GLOBAL); 1035 return; 1036 1037 case Order: 1038 /* 1039 * Create proper predecessor/successor links between the previous 1040 * source and the current one. 1041 */ 1042 gn = Targ_FindNode(src, TARG_CREATE); 1043 if (doing_depend) 1044 ParseMark(gn); 1045 if (predecessor != NULL) { 1046 (void)Lst_AtEnd(predecessor->order_succ, gn); 1047 (void)Lst_AtEnd(gn->order_pred, predecessor); 1048 if (DEBUG(PARSE)) { 1049 fprintf(debug_file, "# %s: added Order dependency %s - %s\n", 1050 __func__, predecessor->name, gn->name); 1051 Targ_PrintNode(predecessor, 0); 1052 Targ_PrintNode(gn, 0); 1053 } 1054 } 1055 /* 1056 * The current source now becomes the predecessor for the next one. 1057 */ 1058 predecessor = gn; 1059 break; 1060 1061 default: 1062 /* 1063 * If the source is not an attribute, we need to find/create 1064 * a node for it. After that we can apply any operator to it 1065 * from a special target or link it to its parents, as 1066 * appropriate. 1067 * 1068 * In the case of a source that was the object of a :: operator, 1069 * the attribute is applied to all of its instances (as kept in 1070 * the 'cohorts' list of the node) or all the cohorts are linked 1071 * to all the targets. 1072 */ 1073 1074 /* Find/create the 'src' node and attach to all targets */ 1075 gn = Targ_FindNode(src, TARG_CREATE); 1076 if (doing_depend) 1077 ParseMark(gn); 1078 if (tOp) { 1079 gn->type |= tOp; 1080 } else { 1081 Lst_ForEach(targets, ParseLinkSrc, gn); 1082 } 1083 break; 1084 } 1085 } 1086 1087 /*- 1088 *----------------------------------------------------------------------- 1089 * ParseFindMain -- 1090 * Find a real target in the list and set it to be the main one. 1091 * Called by ParseDoDependency when a main target hasn't been found 1092 * yet. 1093 * 1094 * Input: 1095 * gnp Node to examine 1096 * 1097 * Results: 1098 * 0 if main not found yet, 1 if it is. 1099 * 1100 * Side Effects: 1101 * mainNode is changed and Targ_SetMain is called. 1102 * 1103 *----------------------------------------------------------------------- 1104 */ 1105 static int 1106 ParseFindMain(void *gnp, void *dummy MAKE_ATTR_UNUSED) 1107 { 1108 GNode *gn = (GNode *)gnp; 1109 if ((gn->type & OP_NOTARGET) == 0) { 1110 mainNode = gn; 1111 Targ_SetMain(gn); 1112 return 1; 1113 } else { 1114 return 0; 1115 } 1116 } 1117 1118 /*- 1119 *----------------------------------------------------------------------- 1120 * ParseAddDir -- 1121 * Front-end for Dir_AddDir to make sure Lst_ForEach keeps going 1122 * 1123 * Results: 1124 * === 0 1125 * 1126 * Side Effects: 1127 * See Dir_AddDir. 1128 * 1129 *----------------------------------------------------------------------- 1130 */ 1131 static int 1132 ParseAddDir(void *path, void *name) 1133 { 1134 (void)Dir_AddDir((Lst) path, (char *)name); 1135 return(0); 1136 } 1137 1138 /*- 1139 *----------------------------------------------------------------------- 1140 * ParseClearPath -- 1141 * Front-end for Dir_ClearPath to make sure Lst_ForEach keeps going 1142 * 1143 * Results: 1144 * === 0 1145 * 1146 * Side Effects: 1147 * See Dir_ClearPath 1148 * 1149 *----------------------------------------------------------------------- 1150 */ 1151 static int 1152 ParseClearPath(void *path, void *dummy MAKE_ATTR_UNUSED) 1153 { 1154 Dir_ClearPath((Lst) path); 1155 return 0; 1156 } 1157 1158 /*- 1159 *--------------------------------------------------------------------- 1160 * ParseDoDependency -- 1161 * Parse the dependency line in line. 1162 * 1163 * Input: 1164 * line the line to parse 1165 * 1166 * Results: 1167 * None 1168 * 1169 * Side Effects: 1170 * The nodes of the sources are linked as children to the nodes of the 1171 * targets. Some nodes may be created. 1172 * 1173 * We parse a dependency line by first extracting words from the line and 1174 * finding nodes in the list of all targets with that name. This is done 1175 * until a character is encountered which is an operator character. Currently 1176 * these are only ! and :. At this point the operator is parsed and the 1177 * pointer into the line advanced until the first source is encountered. 1178 * The parsed operator is applied to each node in the 'targets' list, 1179 * which is where the nodes found for the targets are kept, by means of 1180 * the ParseDoOp function. 1181 * The sources are read in much the same way as the targets were except 1182 * that now they are expanded using the wildcarding scheme of the C-Shell 1183 * and all instances of the resulting words in the list of all targets 1184 * are found. Each of the resulting nodes is then linked to each of the 1185 * targets as one of its children. 1186 * Certain targets are handled specially. These are the ones detailed 1187 * by the specType variable. 1188 * The storing of transformation rules is also taken care of here. 1189 * A target is recognized as a transformation rule by calling 1190 * Suff_IsTransform. If it is a transformation rule, its node is gotten 1191 * from the suffix module via Suff_AddTransform rather than the standard 1192 * Targ_FindNode in the target module. 1193 *--------------------------------------------------------------------- 1194 */ 1195 static void 1196 ParseDoDependency(char *line) 1197 { 1198 char *cp; /* our current position */ 1199 GNode *gn = NULL; /* a general purpose temporary node */ 1200 int op; /* the operator on the line */ 1201 char savec; /* a place to save a character */ 1202 Lst paths; /* List of search paths to alter when parsing 1203 * a list of .PATH targets */ 1204 int tOp; /* operator from special target */ 1205 Lst sources; /* list of archive source names after 1206 * expansion */ 1207 Lst curTargs; /* list of target names to be found and added 1208 * to the targets list */ 1209 char *lstart = line; 1210 1211 if (DEBUG(PARSE)) 1212 fprintf(debug_file, "ParseDoDependency(%s)\n", line); 1213 tOp = 0; 1214 1215 specType = Not; 1216 paths = NULL; 1217 1218 curTargs = Lst_Init(FALSE); 1219 1220 /* 1221 * First, grind through the targets. 1222 */ 1223 1224 do { 1225 /* 1226 * Here LINE points to the beginning of the next word, and 1227 * LSTART points to the actual beginning of the line. 1228 */ 1229 1230 /* Find the end of the next word. */ 1231 for (cp = line; *cp && (ParseIsEscaped(lstart, cp) || 1232 !(isspace((unsigned char)*cp) || 1233 *cp == '!' || *cp == ':' || *cp == LPAREN)); 1234 cp++) { 1235 if (*cp == '$') { 1236 /* 1237 * Must be a dynamic source (would have been expanded 1238 * otherwise), so call the Var module to parse the puppy 1239 * so we can safely advance beyond it...There should be 1240 * no errors in this, as they would have been discovered 1241 * in the initial Var_Subst and we wouldn't be here. 1242 */ 1243 int length; 1244 void *freeIt; 1245 1246 (void)Var_Parse(cp, VAR_CMD, VARF_UNDEFERR|VARF_WANTRES, 1247 &length, &freeIt); 1248 free(freeIt); 1249 cp += length-1; 1250 } 1251 } 1252 1253 /* 1254 * If the word is followed by a left parenthesis, it's the 1255 * name of an object file inside an archive (ar file). 1256 */ 1257 if (!ParseIsEscaped(lstart, cp) && *cp == LPAREN) { 1258 /* 1259 * Archives must be handled specially to make sure the OP_ARCHV 1260 * flag is set in their 'type' field, for one thing, and because 1261 * things like "archive(file1.o file2.o file3.o)" are permissible. 1262 * Arch_ParseArchive will set 'line' to be the first non-blank 1263 * after the archive-spec. It creates/finds nodes for the members 1264 * and places them on the given list, returning SUCCESS if all 1265 * went well and FAILURE if there was an error in the 1266 * specification. On error, line should remain untouched. 1267 */ 1268 if (Arch_ParseArchive(&line, targets, VAR_CMD) != SUCCESS) { 1269 Parse_Error(PARSE_FATAL, 1270 "Error in archive specification: \"%s\"", line); 1271 goto out; 1272 } else { 1273 /* Done with this word; on to the next. */ 1274 cp = line; 1275 continue; 1276 } 1277 } 1278 1279 if (!*cp) { 1280 /* 1281 * We got to the end of the line while we were still 1282 * looking at targets. 1283 * 1284 * Ending a dependency line without an operator is a Bozo 1285 * no-no. As a heuristic, this is also often triggered by 1286 * undetected conflicts from cvs/rcs merges. 1287 */ 1288 if ((strncmp(line, "<<<<<<", 6) == 0) || 1289 (strncmp(line, "======", 6) == 0) || 1290 (strncmp(line, ">>>>>>", 6) == 0)) 1291 Parse_Error(PARSE_FATAL, 1292 "Makefile appears to contain unresolved cvs/rcs/??? merge conflicts"); 1293 else 1294 Parse_Error(PARSE_FATAL, lstart[0] == '.' ? "Unknown directive" 1295 : "Need an operator"); 1296 goto out; 1297 } 1298 1299 /* Insert a null terminator. */ 1300 savec = *cp; 1301 *cp = '\0'; 1302 1303 /* 1304 * Got the word. See if it's a special target and if so set 1305 * specType to match it. 1306 */ 1307 if (*line == '.' && isupper ((unsigned char)line[1])) { 1308 /* 1309 * See if the target is a special target that must have it 1310 * or its sources handled specially. 1311 */ 1312 int keywd = ParseFindKeyword(line); 1313 if (keywd != -1) { 1314 if (specType == ExPath && parseKeywords[keywd].spec != ExPath) { 1315 Parse_Error(PARSE_FATAL, "Mismatched special targets"); 1316 goto out; 1317 } 1318 1319 specType = parseKeywords[keywd].spec; 1320 tOp = parseKeywords[keywd].op; 1321 1322 /* 1323 * Certain special targets have special semantics: 1324 * .PATH Have to set the dirSearchPath 1325 * variable too 1326 * .MAIN Its sources are only used if 1327 * nothing has been specified to 1328 * create. 1329 * .DEFAULT Need to create a node to hang 1330 * commands on, but we don't want 1331 * it in the graph, nor do we want 1332 * it to be the Main Target, so we 1333 * create it, set OP_NOTMAIN and 1334 * add it to the list, setting 1335 * DEFAULT to the new node for 1336 * later use. We claim the node is 1337 * A transformation rule to make 1338 * life easier later, when we'll 1339 * use Make_HandleUse to actually 1340 * apply the .DEFAULT commands. 1341 * .PHONY The list of targets 1342 * .NOPATH Don't search for file in the path 1343 * .STALE 1344 * .BEGIN 1345 * .END 1346 * .ERROR 1347 * .DELETE_ON_ERROR 1348 * .INTERRUPT Are not to be considered the 1349 * main target. 1350 * .NOTPARALLEL Make only one target at a time. 1351 * .SINGLESHELL Create a shell for each command. 1352 * .ORDER Must set initial predecessor to NULL 1353 */ 1354 switch (specType) { 1355 case ExPath: 1356 if (paths == NULL) { 1357 paths = Lst_Init(FALSE); 1358 } 1359 (void)Lst_AtEnd(paths, dirSearchPath); 1360 break; 1361 case Main: 1362 if (!Lst_IsEmpty(create)) { 1363 specType = Not; 1364 } 1365 break; 1366 case Begin: 1367 case End: 1368 case Stale: 1369 case dotError: 1370 case Interrupt: 1371 gn = Targ_FindNode(line, TARG_CREATE); 1372 if (doing_depend) 1373 ParseMark(gn); 1374 gn->type |= OP_NOTMAIN|OP_SPECIAL; 1375 (void)Lst_AtEnd(targets, gn); 1376 break; 1377 case Default: 1378 gn = Targ_NewGN(".DEFAULT"); 1379 gn->type |= (OP_NOTMAIN|OP_TRANSFORM); 1380 (void)Lst_AtEnd(targets, gn); 1381 DEFAULT = gn; 1382 break; 1383 case DeleteOnError: 1384 deleteOnError = TRUE; 1385 break; 1386 case NotParallel: 1387 maxJobs = 1; 1388 break; 1389 case SingleShell: 1390 compatMake = TRUE; 1391 break; 1392 case Order: 1393 predecessor = NULL; 1394 break; 1395 default: 1396 break; 1397 } 1398 } else if (strncmp(line, ".PATH", 5) == 0) { 1399 /* 1400 * .PATH<suffix> has to be handled specially. 1401 * Call on the suffix module to give us a path to 1402 * modify. 1403 */ 1404 Lst path; 1405 1406 specType = ExPath; 1407 path = Suff_GetPath(&line[5]); 1408 if (path == NULL) { 1409 Parse_Error(PARSE_FATAL, 1410 "Suffix '%s' not defined (yet)", 1411 &line[5]); 1412 goto out; 1413 } else { 1414 if (paths == NULL) { 1415 paths = Lst_Init(FALSE); 1416 } 1417 (void)Lst_AtEnd(paths, path); 1418 } 1419 } 1420 } 1421 1422 /* 1423 * Have word in line. Get or create its node and stick it at 1424 * the end of the targets list 1425 */ 1426 if ((specType == Not) && (*line != '\0')) { 1427 if (Dir_HasWildcards(line)) { 1428 /* 1429 * Targets are to be sought only in the current directory, 1430 * so create an empty path for the thing. Note we need to 1431 * use Dir_Destroy in the destruction of the path as the 1432 * Dir module could have added a directory to the path... 1433 */ 1434 Lst emptyPath = Lst_Init(FALSE); 1435 1436 Dir_Expand(line, emptyPath, curTargs); 1437 1438 Lst_Destroy(emptyPath, Dir_Destroy); 1439 } else { 1440 /* 1441 * No wildcards, but we want to avoid code duplication, 1442 * so create a list with the word on it. 1443 */ 1444 (void)Lst_AtEnd(curTargs, line); 1445 } 1446 1447 /* Apply the targets. */ 1448 1449 while(!Lst_IsEmpty(curTargs)) { 1450 char *targName = (char *)Lst_DeQueue(curTargs); 1451 1452 if (!Suff_IsTransform (targName)) { 1453 gn = Targ_FindNode(targName, TARG_CREATE); 1454 } else { 1455 gn = Suff_AddTransform(targName); 1456 } 1457 if (doing_depend) 1458 ParseMark(gn); 1459 1460 (void)Lst_AtEnd(targets, gn); 1461 } 1462 } else if (specType == ExPath && *line != '.' && *line != '\0') { 1463 Parse_Error(PARSE_WARNING, "Extra target (%s) ignored", line); 1464 } 1465 1466 /* Don't need the inserted null terminator any more. */ 1467 *cp = savec; 1468 1469 /* 1470 * If it is a special type and not .PATH, it's the only target we 1471 * allow on this line... 1472 */ 1473 if (specType != Not && specType != ExPath) { 1474 Boolean warning = FALSE; 1475 1476 while (*cp && (ParseIsEscaped(lstart, cp) || 1477 ((*cp != '!') && (*cp != ':')))) { 1478 if (ParseIsEscaped(lstart, cp) || 1479 (*cp != ' ' && *cp != '\t')) { 1480 warning = TRUE; 1481 } 1482 cp++; 1483 } 1484 if (warning) { 1485 Parse_Error(PARSE_WARNING, "Extra target ignored"); 1486 } 1487 } else { 1488 while (*cp && isspace ((unsigned char)*cp)) { 1489 cp++; 1490 } 1491 } 1492 line = cp; 1493 } while (*line && (ParseIsEscaped(lstart, line) || 1494 ((*line != '!') && (*line != ':')))); 1495 1496 /* 1497 * Don't need the list of target names anymore... 1498 */ 1499 Lst_Destroy(curTargs, NULL); 1500 curTargs = NULL; 1501 1502 if (!Lst_IsEmpty(targets)) { 1503 switch(specType) { 1504 default: 1505 Parse_Error(PARSE_WARNING, "Special and mundane targets don't mix. Mundane ones ignored"); 1506 break; 1507 case Default: 1508 case Stale: 1509 case Begin: 1510 case End: 1511 case dotError: 1512 case Interrupt: 1513 /* 1514 * These four create nodes on which to hang commands, so 1515 * targets shouldn't be empty... 1516 */ 1517 case Not: 1518 /* 1519 * Nothing special here -- targets can be empty if it wants. 1520 */ 1521 break; 1522 } 1523 } 1524 1525 /* 1526 * Have now parsed all the target names. Must parse the operator next. The 1527 * result is left in op . 1528 */ 1529 if (*cp == '!') { 1530 op = OP_FORCE; 1531 } else if (*cp == ':') { 1532 if (cp[1] == ':') { 1533 op = OP_DOUBLEDEP; 1534 cp++; 1535 } else { 1536 op = OP_DEPENDS; 1537 } 1538 } else { 1539 Parse_Error(PARSE_FATAL, lstart[0] == '.' ? "Unknown directive" 1540 : "Missing dependency operator"); 1541 goto out; 1542 } 1543 1544 /* Advance beyond the operator */ 1545 cp++; 1546 1547 /* 1548 * Apply the operator to the target. This is how we remember which 1549 * operator a target was defined with. It fails if the operator 1550 * used isn't consistent across all references. 1551 */ 1552 Lst_ForEach(targets, ParseDoOp, &op); 1553 1554 /* 1555 * Onward to the sources. 1556 * 1557 * LINE will now point to the first source word, if any, or the 1558 * end of the string if not. 1559 */ 1560 while (*cp && isspace ((unsigned char)*cp)) { 1561 cp++; 1562 } 1563 line = cp; 1564 1565 /* 1566 * Several special targets take different actions if present with no 1567 * sources: 1568 * a .SUFFIXES line with no sources clears out all old suffixes 1569 * a .PRECIOUS line makes all targets precious 1570 * a .IGNORE line ignores errors for all targets 1571 * a .SILENT line creates silence when making all targets 1572 * a .PATH removes all directories from the search path(s). 1573 */ 1574 if (!*line) { 1575 switch (specType) { 1576 case Suffixes: 1577 Suff_ClearSuffixes(); 1578 break; 1579 case Precious: 1580 allPrecious = TRUE; 1581 break; 1582 case Ignore: 1583 ignoreErrors = TRUE; 1584 break; 1585 case Silent: 1586 beSilent = TRUE; 1587 break; 1588 case ExPath: 1589 Lst_ForEach(paths, ParseClearPath, NULL); 1590 Dir_SetPATH(); 1591 break; 1592 #ifdef POSIX 1593 case Posix: 1594 Var_Set("%POSIX", "1003.2", VAR_GLOBAL, 0); 1595 break; 1596 #endif 1597 default: 1598 break; 1599 } 1600 } else if (specType == MFlags) { 1601 /* 1602 * Call on functions in main.c to deal with these arguments and 1603 * set the initial character to a null-character so the loop to 1604 * get sources won't get anything 1605 */ 1606 Main_ParseArgLine(line); 1607 *line = '\0'; 1608 } else if (specType == ExShell) { 1609 if (Job_ParseShell(line) != SUCCESS) { 1610 Parse_Error(PARSE_FATAL, "improper shell specification"); 1611 goto out; 1612 } 1613 *line = '\0'; 1614 } else if ((specType == NotParallel) || (specType == SingleShell) || 1615 (specType == DeleteOnError)) { 1616 *line = '\0'; 1617 } 1618 1619 /* 1620 * NOW GO FOR THE SOURCES 1621 */ 1622 if ((specType == Suffixes) || (specType == ExPath) || 1623 (specType == Includes) || (specType == Libs) || 1624 (specType == Null) || (specType == ExObjdir)) 1625 { 1626 while (*line) { 1627 /* 1628 * If the target was one that doesn't take files as its sources 1629 * but takes something like suffixes, we take each 1630 * space-separated word on the line as a something and deal 1631 * with it accordingly. 1632 * 1633 * If the target was .SUFFIXES, we take each source as a 1634 * suffix and add it to the list of suffixes maintained by the 1635 * Suff module. 1636 * 1637 * If the target was a .PATH, we add the source as a directory 1638 * to search on the search path. 1639 * 1640 * If it was .INCLUDES, the source is taken to be the suffix of 1641 * files which will be #included and whose search path should 1642 * be present in the .INCLUDES variable. 1643 * 1644 * If it was .LIBS, the source is taken to be the suffix of 1645 * files which are considered libraries and whose search path 1646 * should be present in the .LIBS variable. 1647 * 1648 * If it was .NULL, the source is the suffix to use when a file 1649 * has no valid suffix. 1650 * 1651 * If it was .OBJDIR, the source is a new definition for .OBJDIR, 1652 * and will cause make to do a new chdir to that path. 1653 */ 1654 while (*cp && !isspace ((unsigned char)*cp)) { 1655 cp++; 1656 } 1657 savec = *cp; 1658 *cp = '\0'; 1659 switch (specType) { 1660 case Suffixes: 1661 Suff_AddSuffix(line, &mainNode); 1662 break; 1663 case ExPath: 1664 Lst_ForEach(paths, ParseAddDir, line); 1665 break; 1666 case Includes: 1667 Suff_AddInclude(line); 1668 break; 1669 case Libs: 1670 Suff_AddLib(line); 1671 break; 1672 case Null: 1673 Suff_SetNull(line); 1674 break; 1675 case ExObjdir: 1676 Main_SetObjdir("%s", line); 1677 break; 1678 default: 1679 break; 1680 } 1681 *cp = savec; 1682 if (savec != '\0') { 1683 cp++; 1684 } 1685 while (*cp && isspace ((unsigned char)*cp)) { 1686 cp++; 1687 } 1688 line = cp; 1689 } 1690 if (paths) { 1691 Lst_Destroy(paths, NULL); 1692 paths = NULL; 1693 } 1694 if (specType == ExPath) 1695 Dir_SetPATH(); 1696 } else { 1697 assert(paths == NULL); 1698 while (*line) { 1699 /* 1700 * The targets take real sources, so we must beware of archive 1701 * specifications (i.e. things with left parentheses in them) 1702 * and handle them accordingly. 1703 */ 1704 for (; *cp && !isspace ((unsigned char)*cp); cp++) { 1705 if ((*cp == LPAREN) && (cp > line) && (cp[-1] != '$')) { 1706 /* 1707 * Only stop for a left parenthesis if it isn't at the 1708 * start of a word (that'll be for variable changes 1709 * later) and isn't preceded by a dollar sign (a dynamic 1710 * source). 1711 */ 1712 break; 1713 } 1714 } 1715 1716 if (*cp == LPAREN) { 1717 sources = Lst_Init(FALSE); 1718 if (Arch_ParseArchive(&line, sources, VAR_CMD) != SUCCESS) { 1719 Parse_Error(PARSE_FATAL, 1720 "Error in source archive spec \"%s\"", line); 1721 goto out; 1722 } 1723 1724 while (!Lst_IsEmpty (sources)) { 1725 gn = (GNode *)Lst_DeQueue(sources); 1726 ParseDoSrc(tOp, gn->name); 1727 } 1728 Lst_Destroy(sources, NULL); 1729 cp = line; 1730 } else { 1731 if (*cp) { 1732 *cp = '\0'; 1733 cp += 1; 1734 } 1735 1736 ParseDoSrc(tOp, line); 1737 } 1738 while (*cp && isspace ((unsigned char)*cp)) { 1739 cp++; 1740 } 1741 line = cp; 1742 } 1743 } 1744 1745 if (mainNode == NULL) { 1746 /* 1747 * If we have yet to decide on a main target to make, in the 1748 * absence of any user input, we want the first target on 1749 * the first dependency line that is actually a real target 1750 * (i.e. isn't a .USE or .EXEC rule) to be made. 1751 */ 1752 Lst_ForEach(targets, ParseFindMain, NULL); 1753 } 1754 1755 out: 1756 if (paths) 1757 Lst_Destroy(paths, NULL); 1758 if (curTargs) 1759 Lst_Destroy(curTargs, NULL); 1760 } 1761 1762 /*- 1763 *--------------------------------------------------------------------- 1764 * Parse_IsVar -- 1765 * Return TRUE if the passed line is a variable assignment. A variable 1766 * assignment consists of a single word followed by optional whitespace 1767 * followed by either a += or an = operator. 1768 * This function is used both by the Parse_File function and main when 1769 * parsing the command-line arguments. 1770 * 1771 * Input: 1772 * line the line to check 1773 * 1774 * Results: 1775 * TRUE if it is. FALSE if it ain't 1776 * 1777 * Side Effects: 1778 * none 1779 *--------------------------------------------------------------------- 1780 */ 1781 Boolean 1782 Parse_IsVar(char *line) 1783 { 1784 Boolean wasSpace = FALSE; /* set TRUE if found a space */ 1785 char ch; 1786 int level = 0; 1787 #define ISEQOPERATOR(c) \ 1788 (((c) == '+') || ((c) == ':') || ((c) == '?') || ((c) == '!')) 1789 1790 /* 1791 * Skip to variable name 1792 */ 1793 for (;(*line == ' ') || (*line == '\t'); line++) 1794 continue; 1795 1796 /* Scan for one of the assignment operators outside a variable expansion */ 1797 while ((ch = *line++) != 0) { 1798 if (ch == '(' || ch == '{') { 1799 level++; 1800 continue; 1801 } 1802 if (ch == ')' || ch == '}') { 1803 level--; 1804 continue; 1805 } 1806 if (level != 0) 1807 continue; 1808 while (ch == ' ' || ch == '\t') { 1809 ch = *line++; 1810 wasSpace = TRUE; 1811 } 1812 #ifdef SUNSHCMD 1813 if (ch == ':' && strncmp(line, "sh", 2) == 0) { 1814 line += 2; 1815 continue; 1816 } 1817 #endif 1818 if (ch == '=') 1819 return TRUE; 1820 if (*line == '=' && ISEQOPERATOR(ch)) 1821 return TRUE; 1822 if (wasSpace) 1823 return FALSE; 1824 } 1825 1826 return FALSE; 1827 } 1828 1829 /*- 1830 *--------------------------------------------------------------------- 1831 * Parse_DoVar -- 1832 * Take the variable assignment in the passed line and do it in the 1833 * global context. 1834 * 1835 * Note: There is a lexical ambiguity with assignment modifier characters 1836 * in variable names. This routine interprets the character before the = 1837 * as a modifier. Therefore, an assignment like 1838 * C++=/usr/bin/CC 1839 * is interpreted as "C+ +=" instead of "C++ =". 1840 * 1841 * Input: 1842 * line a line guaranteed to be a variable assignment. 1843 * This reduces error checks 1844 * ctxt Context in which to do the assignment 1845 * 1846 * Results: 1847 * none 1848 * 1849 * Side Effects: 1850 * the variable structure of the given variable name is altered in the 1851 * global context. 1852 *--------------------------------------------------------------------- 1853 */ 1854 void 1855 Parse_DoVar(char *line, GNode *ctxt) 1856 { 1857 char *cp; /* pointer into line */ 1858 enum { 1859 VAR_SUBST, VAR_APPEND, VAR_SHELL, VAR_NORMAL 1860 } type; /* Type of assignment */ 1861 char *opc; /* ptr to operator character to 1862 * null-terminate the variable name */ 1863 Boolean freeCp = FALSE; /* TRUE if cp needs to be freed, 1864 * i.e. if any variable expansion was 1865 * performed */ 1866 int depth; 1867 1868 /* 1869 * Skip to variable name 1870 */ 1871 while ((*line == ' ') || (*line == '\t')) { 1872 line++; 1873 } 1874 1875 /* 1876 * Skip to operator character, nulling out whitespace as we go 1877 * XXX Rather than counting () and {} we should look for $ and 1878 * then expand the variable. 1879 */ 1880 for (depth = 0, cp = line + 1; depth > 0 || *cp != '='; cp++) { 1881 if (*cp == '(' || *cp == '{') { 1882 depth++; 1883 continue; 1884 } 1885 if (*cp == ')' || *cp == '}') { 1886 depth--; 1887 continue; 1888 } 1889 if (depth == 0 && isspace ((unsigned char)*cp)) { 1890 *cp = '\0'; 1891 } 1892 } 1893 opc = cp-1; /* operator is the previous character */ 1894 *cp++ = '\0'; /* nuke the = */ 1895 1896 /* 1897 * Check operator type 1898 */ 1899 switch (*opc) { 1900 case '+': 1901 type = VAR_APPEND; 1902 *opc = '\0'; 1903 break; 1904 1905 case '?': 1906 /* 1907 * If the variable already has a value, we don't do anything. 1908 */ 1909 *opc = '\0'; 1910 if (Var_Exists(line, ctxt)) { 1911 return; 1912 } else { 1913 type = VAR_NORMAL; 1914 } 1915 break; 1916 1917 case ':': 1918 type = VAR_SUBST; 1919 *opc = '\0'; 1920 break; 1921 1922 case '!': 1923 type = VAR_SHELL; 1924 *opc = '\0'; 1925 break; 1926 1927 default: 1928 #ifdef SUNSHCMD 1929 while (opc > line && *opc != ':') 1930 opc--; 1931 1932 if (strncmp(opc, ":sh", 3) == 0) { 1933 type = VAR_SHELL; 1934 *opc = '\0'; 1935 break; 1936 } 1937 #endif 1938 type = VAR_NORMAL; 1939 break; 1940 } 1941 1942 while (isspace ((unsigned char)*cp)) { 1943 cp++; 1944 } 1945 1946 if (type == VAR_APPEND) { 1947 Var_Append(line, cp, ctxt); 1948 } else if (type == VAR_SUBST) { 1949 /* 1950 * Allow variables in the old value to be undefined, but leave their 1951 * invocation alone -- this is done by forcing oldVars to be false. 1952 * XXX: This can cause recursive variables, but that's not hard to do, 1953 * and this allows someone to do something like 1954 * 1955 * CFLAGS = $(.INCLUDES) 1956 * CFLAGS := -I.. $(CFLAGS) 1957 * 1958 * And not get an error. 1959 */ 1960 Boolean oldOldVars = oldVars; 1961 1962 oldVars = FALSE; 1963 1964 /* 1965 * make sure that we set the variable the first time to nothing 1966 * so that it gets substituted! 1967 */ 1968 if (!Var_Exists(line, ctxt)) 1969 Var_Set(line, "", ctxt, 0); 1970 1971 cp = Var_Subst(NULL, cp, ctxt, VARF_WANTRES|VARF_ASSIGN); 1972 oldVars = oldOldVars; 1973 freeCp = TRUE; 1974 1975 Var_Set(line, cp, ctxt, 0); 1976 } else if (type == VAR_SHELL) { 1977 char *res; 1978 const char *error; 1979 1980 if (strchr(cp, '$') != NULL) { 1981 /* 1982 * There's a dollar sign in the command, so perform variable 1983 * expansion on the whole thing. The resulting string will need 1984 * freeing when we're done, so set freeCmd to TRUE. 1985 */ 1986 cp = Var_Subst(NULL, cp, VAR_CMD, VARF_UNDEFERR|VARF_WANTRES); 1987 freeCp = TRUE; 1988 } 1989 1990 res = Cmd_Exec(cp, &error); 1991 Var_Set(line, res, ctxt, 0); 1992 free(res); 1993 1994 if (error) 1995 Parse_Error(PARSE_WARNING, error, cp); 1996 } else { 1997 /* 1998 * Normal assignment -- just do it. 1999 */ 2000 Var_Set(line, cp, ctxt, 0); 2001 } 2002 if (strcmp(line, MAKEOVERRIDES) == 0) 2003 Main_ExportMAKEFLAGS(FALSE); /* re-export MAKEFLAGS */ 2004 else if (strcmp(line, ".CURDIR") == 0) { 2005 /* 2006 * Somone is being (too?) clever... 2007 * Let's pretend they know what they are doing and 2008 * re-initialize the 'cur' Path. 2009 */ 2010 Dir_InitCur(cp); 2011 Dir_SetPATH(); 2012 } else if (strcmp(line, MAKE_JOB_PREFIX) == 0) { 2013 Job_SetPrefix(); 2014 } else if (strcmp(line, MAKE_EXPORTED) == 0) { 2015 Var_Export(cp, 0); 2016 } 2017 if (freeCp) 2018 free(cp); 2019 } 2020 2021 2022 /* 2023 * ParseMaybeSubMake -- 2024 * Scan the command string to see if it a possible submake node 2025 * Input: 2026 * cmd the command to scan 2027 * Results: 2028 * TRUE if the command is possibly a submake, FALSE if not. 2029 */ 2030 static Boolean 2031 ParseMaybeSubMake(const char *cmd) 2032 { 2033 size_t i; 2034 static struct { 2035 const char *name; 2036 size_t len; 2037 } vals[] = { 2038 #define MKV(A) { A, sizeof(A) - 1 } 2039 MKV("${MAKE}"), 2040 MKV("${.MAKE}"), 2041 MKV("$(MAKE)"), 2042 MKV("$(.MAKE)"), 2043 MKV("make"), 2044 }; 2045 for (i = 0; i < sizeof(vals)/sizeof(vals[0]); i++) { 2046 char *ptr; 2047 if ((ptr = strstr(cmd, vals[i].name)) == NULL) 2048 continue; 2049 if ((ptr == cmd || !isalnum((unsigned char)ptr[-1])) 2050 && !isalnum((unsigned char)ptr[vals[i].len])) 2051 return TRUE; 2052 } 2053 return FALSE; 2054 } 2055 2056 /*- 2057 * ParseAddCmd -- 2058 * Lst_ForEach function to add a command line to all targets 2059 * 2060 * Input: 2061 * gnp the node to which the command is to be added 2062 * cmd the command to add 2063 * 2064 * Results: 2065 * Always 0 2066 * 2067 * Side Effects: 2068 * A new element is added to the commands list of the node, 2069 * and the node can be marked as a submake node if the command is 2070 * determined to be that. 2071 */ 2072 static int 2073 ParseAddCmd(void *gnp, void *cmd) 2074 { 2075 GNode *gn = (GNode *)gnp; 2076 2077 /* Add to last (ie current) cohort for :: targets */ 2078 if ((gn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (gn->cohorts)) 2079 gn = (GNode *)Lst_Datum(Lst_Last(gn->cohorts)); 2080 2081 /* if target already supplied, ignore commands */ 2082 if (!(gn->type & OP_HAS_COMMANDS)) { 2083 (void)Lst_AtEnd(gn->commands, cmd); 2084 if (ParseMaybeSubMake(cmd)) 2085 gn->type |= OP_SUBMAKE; 2086 ParseMark(gn); 2087 } else { 2088 #ifdef notyet 2089 /* XXX: We cannot do this until we fix the tree */ 2090 (void)Lst_AtEnd(gn->commands, cmd); 2091 Parse_Error(PARSE_WARNING, 2092 "overriding commands for target \"%s\"; " 2093 "previous commands defined at %s: %d ignored", 2094 gn->name, gn->fname, gn->lineno); 2095 #else 2096 Parse_Error(PARSE_WARNING, 2097 "duplicate script for target \"%s\" ignored", 2098 gn->name); 2099 ParseErrorInternal(gn->fname, gn->lineno, PARSE_WARNING, 2100 "using previous script for \"%s\" defined here", 2101 gn->name); 2102 #endif 2103 } 2104 return(0); 2105 } 2106 2107 /*- 2108 *----------------------------------------------------------------------- 2109 * ParseHasCommands -- 2110 * Callback procedure for Parse_File when destroying the list of 2111 * targets on the last dependency line. Marks a target as already 2112 * having commands if it does, to keep from having shell commands 2113 * on multiple dependency lines. 2114 * 2115 * Input: 2116 * gnp Node to examine 2117 * 2118 * Results: 2119 * None 2120 * 2121 * Side Effects: 2122 * OP_HAS_COMMANDS may be set for the target. 2123 * 2124 *----------------------------------------------------------------------- 2125 */ 2126 static void 2127 ParseHasCommands(void *gnp) 2128 { 2129 GNode *gn = (GNode *)gnp; 2130 if (!Lst_IsEmpty(gn->commands)) { 2131 gn->type |= OP_HAS_COMMANDS; 2132 } 2133 } 2134 2135 /*- 2136 *----------------------------------------------------------------------- 2137 * Parse_AddIncludeDir -- 2138 * Add a directory to the path searched for included makefiles 2139 * bracketed by double-quotes. Used by functions in main.c 2140 * 2141 * Input: 2142 * dir The name of the directory to add 2143 * 2144 * Results: 2145 * None. 2146 * 2147 * Side Effects: 2148 * The directory is appended to the list. 2149 * 2150 *----------------------------------------------------------------------- 2151 */ 2152 void 2153 Parse_AddIncludeDir(char *dir) 2154 { 2155 (void)Dir_AddDir(parseIncPath, dir); 2156 } 2157 2158 /*- 2159 *--------------------------------------------------------------------- 2160 * ParseDoInclude -- 2161 * Push to another file. 2162 * 2163 * The input is the line minus the `.'. A file spec is a string 2164 * enclosed in <> or "". The former is looked for only in sysIncPath. 2165 * The latter in . and the directories specified by -I command line 2166 * options 2167 * 2168 * Results: 2169 * None 2170 * 2171 * Side Effects: 2172 * A structure is added to the includes Lst and readProc, lineno, 2173 * fname and curFILE are altered for the new file 2174 *--------------------------------------------------------------------- 2175 */ 2176 2177 static void 2178 Parse_include_file(char *file, Boolean isSystem, Boolean depinc, int silent) 2179 { 2180 struct loadedfile *lf; 2181 char *fullname; /* full pathname of file */ 2182 char *newName; 2183 char *prefEnd, *incdir; 2184 int fd; 2185 int i; 2186 2187 /* 2188 * Now we know the file's name and its search path, we attempt to 2189 * find the durn thing. A return of NULL indicates the file don't 2190 * exist. 2191 */ 2192 fullname = file[0] == '/' ? bmake_strdup(file) : NULL; 2193 2194 if (fullname == NULL && !isSystem) { 2195 /* 2196 * Include files contained in double-quotes are first searched for 2197 * relative to the including file's location. We don't want to 2198 * cd there, of course, so we just tack on the old file's 2199 * leading path components and call Dir_FindFile to see if 2200 * we can locate the beast. 2201 */ 2202 2203 incdir = bmake_strdup(curFile->fname); 2204 prefEnd = strrchr(incdir, '/'); 2205 if (prefEnd != NULL) { 2206 *prefEnd = '\0'; 2207 /* Now do lexical processing of leading "../" on the filename */ 2208 for (i = 0; strncmp(file + i, "../", 3) == 0; i += 3) { 2209 prefEnd = strrchr(incdir + 1, '/'); 2210 if (prefEnd == NULL || strcmp(prefEnd, "/..") == 0) 2211 break; 2212 *prefEnd = '\0'; 2213 } 2214 newName = str_concat(incdir, file + i, STR_ADDSLASH); 2215 fullname = Dir_FindFile(newName, parseIncPath); 2216 if (fullname == NULL) 2217 fullname = Dir_FindFile(newName, dirSearchPath); 2218 free(newName); 2219 } 2220 free(incdir); 2221 2222 if (fullname == NULL) { 2223 /* 2224 * Makefile wasn't found in same directory as included makefile. 2225 * Search for it first on the -I search path, 2226 * then on the .PATH search path, if not found in a -I directory. 2227 * If we have a suffix specific path we should use that. 2228 */ 2229 char *suff; 2230 Lst suffPath = NULL; 2231 2232 if ((suff = strrchr(file, '.'))) { 2233 suffPath = Suff_GetPath(suff); 2234 if (suffPath != NULL) { 2235 fullname = Dir_FindFile(file, suffPath); 2236 } 2237 } 2238 if (fullname == NULL) { 2239 fullname = Dir_FindFile(file, parseIncPath); 2240 if (fullname == NULL) { 2241 fullname = Dir_FindFile(file, dirSearchPath); 2242 } 2243 } 2244 } 2245 } 2246 2247 /* Looking for a system file or file still not found */ 2248 if (fullname == NULL) { 2249 /* 2250 * Look for it on the system path 2251 */ 2252 fullname = Dir_FindFile(file, 2253 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath); 2254 } 2255 2256 if (fullname == NULL) { 2257 if (!silent) 2258 Parse_Error(PARSE_FATAL, "Could not find %s", file); 2259 return; 2260 } 2261 2262 /* Actually open the file... */ 2263 fd = open(fullname, O_RDONLY); 2264 if (fd == -1) { 2265 if (!silent) 2266 Parse_Error(PARSE_FATAL, "Cannot open %s", fullname); 2267 free(fullname); 2268 return; 2269 } 2270 2271 /* load it */ 2272 lf = loadfile(fullname, fd); 2273 2274 ParseSetIncludedFile(); 2275 /* Start reading from this file next */ 2276 Parse_SetInput(fullname, 0, -1, loadedfile_nextbuf, lf); 2277 curFile->lf = lf; 2278 if (depinc) 2279 doing_depend = depinc; /* only turn it on */ 2280 } 2281 2282 static void 2283 ParseDoInclude(char *line) 2284 { 2285 char endc; /* the character which ends the file spec */ 2286 char *cp; /* current position in file spec */ 2287 int silent = (*line != 'i') ? 1 : 0; 2288 char *file = &line[7 + silent]; 2289 2290 /* Skip to delimiter character so we know where to look */ 2291 while (*file == ' ' || *file == '\t') 2292 file++; 2293 2294 if (*file != '"' && *file != '<') { 2295 Parse_Error(PARSE_FATAL, 2296 ".include filename must be delimited by '\"' or '<'"); 2297 return; 2298 } 2299 2300 /* 2301 * Set the search path on which to find the include file based on the 2302 * characters which bracket its name. Angle-brackets imply it's 2303 * a system Makefile while double-quotes imply it's a user makefile 2304 */ 2305 if (*file == '<') { 2306 endc = '>'; 2307 } else { 2308 endc = '"'; 2309 } 2310 2311 /* Skip to matching delimiter */ 2312 for (cp = ++file; *cp && *cp != endc; cp++) 2313 continue; 2314 2315 if (*cp != endc) { 2316 Parse_Error(PARSE_FATAL, 2317 "Unclosed %cinclude filename. '%c' expected", 2318 '.', endc); 2319 return; 2320 } 2321 *cp = '\0'; 2322 2323 /* 2324 * Substitute for any variables in the file name before trying to 2325 * find the thing. 2326 */ 2327 file = Var_Subst(NULL, file, VAR_CMD, VARF_WANTRES); 2328 2329 Parse_include_file(file, endc == '>', (*line == 'd'), silent); 2330 free(file); 2331 } 2332 2333 2334 /*- 2335 *--------------------------------------------------------------------- 2336 * ParseSetIncludedFile -- 2337 * Set the .INCLUDEDFROMFILE variable to the contents of .PARSEFILE 2338 * and the .INCLUDEDFROMDIR variable to the contents of .PARSEDIR 2339 * 2340 * Results: 2341 * None 2342 * 2343 * Side Effects: 2344 * The .INCLUDEDFROMFILE variable is overwritten by the contents 2345 * of .PARSEFILE and the .INCLUDEDFROMDIR variable is overwriten 2346 * by the contents of .PARSEDIR 2347 *--------------------------------------------------------------------- 2348 */ 2349 static void 2350 ParseSetIncludedFile(void) 2351 { 2352 char *pf, *fp = NULL; 2353 char *pd, *dp = NULL; 2354 2355 pf = Var_Value(".PARSEFILE", VAR_GLOBAL, &fp); 2356 Var_Set(".INCLUDEDFROMFILE", pf, VAR_GLOBAL, 0); 2357 pd = Var_Value(".PARSEDIR", VAR_GLOBAL, &dp); 2358 Var_Set(".INCLUDEDFROMDIR", pd, VAR_GLOBAL, 0); 2359 2360 if (DEBUG(PARSE)) 2361 fprintf(debug_file, "%s: ${.INCLUDEDFROMDIR} = `%s' " 2362 "${.INCLUDEDFROMFILE} = `%s'\n", __func__, pd, pf); 2363 2364 free(fp); 2365 free(dp); 2366 } 2367 /*- 2368 *--------------------------------------------------------------------- 2369 * ParseSetParseFile -- 2370 * Set the .PARSEDIR and .PARSEFILE variables to the dirname and 2371 * basename of the given filename 2372 * 2373 * Results: 2374 * None 2375 * 2376 * Side Effects: 2377 * The .PARSEDIR and .PARSEFILE variables are overwritten by the 2378 * dirname and basename of the given filename. 2379 *--------------------------------------------------------------------- 2380 */ 2381 static void 2382 ParseSetParseFile(const char *filename) 2383 { 2384 char *slash, *dirname; 2385 const char *pd, *pf; 2386 int len; 2387 2388 slash = strrchr(filename, '/'); 2389 if (slash == NULL) { 2390 Var_Set(".PARSEDIR", pd = curdir, VAR_GLOBAL, 0); 2391 Var_Set(".PARSEFILE", pf = filename, VAR_GLOBAL, 0); 2392 dirname= NULL; 2393 } else { 2394 len = slash - filename; 2395 dirname = bmake_malloc(len + 1); 2396 memcpy(dirname, filename, len); 2397 dirname[len] = '\0'; 2398 Var_Set(".PARSEDIR", pd = dirname, VAR_GLOBAL, 0); 2399 Var_Set(".PARSEFILE", pf = slash + 1, VAR_GLOBAL, 0); 2400 } 2401 if (DEBUG(PARSE)) 2402 fprintf(debug_file, "%s: ${.PARSEDIR} = `%s' ${.PARSEFILE} = `%s'\n", 2403 __func__, pd, pf); 2404 free(dirname); 2405 } 2406 2407 /* 2408 * Track the makefiles we read - so makefiles can 2409 * set dependencies on them. 2410 * Avoid adding anything more than once. 2411 */ 2412 2413 static void 2414 ParseTrackInput(const char *name) 2415 { 2416 char *old; 2417 char *ep; 2418 char *fp = NULL; 2419 size_t name_len = strlen(name); 2420 2421 old = Var_Value(MAKE_MAKEFILES, VAR_GLOBAL, &fp); 2422 if (old) { 2423 ep = old + strlen(old) - name_len; 2424 /* does it contain name? */ 2425 for (; old != NULL; old = strchr(old, ' ')) { 2426 if (*old == ' ') 2427 old++; 2428 if (old >= ep) 2429 break; /* cannot contain name */ 2430 if (memcmp(old, name, name_len) == 0 2431 && (old[name_len] == 0 || old[name_len] == ' ')) 2432 goto cleanup; 2433 } 2434 } 2435 Var_Append (MAKE_MAKEFILES, name, VAR_GLOBAL); 2436 cleanup: 2437 if (fp) { 2438 free(fp); 2439 } 2440 } 2441 2442 2443 /*- 2444 *--------------------------------------------------------------------- 2445 * Parse_setInput -- 2446 * Start Parsing from the given source 2447 * 2448 * Results: 2449 * None 2450 * 2451 * Side Effects: 2452 * A structure is added to the includes Lst and readProc, lineno, 2453 * fname and curFile are altered for the new file 2454 *--------------------------------------------------------------------- 2455 */ 2456 void 2457 Parse_SetInput(const char *name, int line, int fd, 2458 char *(*nextbuf)(void *, size_t *), void *arg) 2459 { 2460 char *buf; 2461 size_t len; 2462 2463 if (name == NULL) 2464 name = curFile->fname; 2465 else 2466 ParseTrackInput(name); 2467 2468 if (DEBUG(PARSE)) 2469 fprintf(debug_file, "%s: file %s, line %d, fd %d, nextbuf %p, arg %p\n", 2470 __func__, name, line, fd, nextbuf, arg); 2471 2472 if (fd == -1 && nextbuf == NULL) 2473 /* sanity */ 2474 return; 2475 2476 if (curFile != NULL) 2477 /* Save exiting file info */ 2478 Lst_AtFront(includes, curFile); 2479 2480 /* Allocate and fill in new structure */ 2481 curFile = bmake_malloc(sizeof *curFile); 2482 2483 /* 2484 * Once the previous state has been saved, we can get down to reading 2485 * the new file. We set up the name of the file to be the absolute 2486 * name of the include file so error messages refer to the right 2487 * place. 2488 */ 2489 curFile->fname = bmake_strdup(name); 2490 curFile->lineno = line; 2491 curFile->first_lineno = line; 2492 curFile->nextbuf = nextbuf; 2493 curFile->nextbuf_arg = arg; 2494 curFile->lf = NULL; 2495 curFile->depending = doing_depend; /* restore this on EOF */ 2496 2497 assert(nextbuf != NULL); 2498 2499 /* Get first block of input data */ 2500 buf = curFile->nextbuf(curFile->nextbuf_arg, &len); 2501 if (buf == NULL) { 2502 /* Was all a waste of time ... */ 2503 if (curFile->fname) 2504 free(curFile->fname); 2505 free(curFile); 2506 return; 2507 } 2508 curFile->P_str = buf; 2509 curFile->P_ptr = buf; 2510 curFile->P_end = buf+len; 2511 2512 curFile->cond_depth = Cond_save_depth(); 2513 ParseSetParseFile(name); 2514 } 2515 2516 /*- 2517 *----------------------------------------------------------------------- 2518 * IsInclude -- 2519 * Check if the line is an include directive 2520 * 2521 * Results: 2522 * TRUE if it is. 2523 * 2524 * Side Effects: 2525 * None 2526 * 2527 *----------------------------------------------------------------------- 2528 */ 2529 static Boolean 2530 IsInclude(const char *line, Boolean sysv) 2531 { 2532 static const char inc[] = "include"; 2533 static const size_t inclen = sizeof(inc) - 1; 2534 2535 // 'd' is not valid for sysv 2536 int o = strchr(&("ds-"[sysv]), *line) != NULL; 2537 2538 if (strncmp(line + o, inc, inclen) != 0) 2539 return FALSE; 2540 2541 // Space is not mandatory for BSD .include 2542 return !sysv || isspace((unsigned char)line[inclen + o]); 2543 } 2544 2545 2546 #ifdef SYSVINCLUDE 2547 /*- 2548 *----------------------------------------------------------------------- 2549 * IsSysVInclude -- 2550 * Check if the line is a SYSV include directive 2551 * 2552 * Results: 2553 * TRUE if it is. 2554 * 2555 * Side Effects: 2556 * None 2557 * 2558 *----------------------------------------------------------------------- 2559 */ 2560 static Boolean 2561 IsSysVInclude(const char *line) 2562 { 2563 const char *p; 2564 2565 if (!IsInclude(line, TRUE)) 2566 return FALSE; 2567 2568 /* Avoid interpeting a dependency line as an include */ 2569 for (p = line; (p = strchr(p, ':')) != NULL;) { 2570 if (*++p == '\0') { 2571 /* end of line -> dependency */ 2572 return FALSE; 2573 } 2574 if (*p == ':' || isspace((unsigned char)*p)) { 2575 /* :: operator or ': ' -> dependency */ 2576 return FALSE; 2577 } 2578 } 2579 return TRUE; 2580 } 2581 2582 /*- 2583 *--------------------------------------------------------------------- 2584 * ParseTraditionalInclude -- 2585 * Push to another file. 2586 * 2587 * The input is the current line. The file name(s) are 2588 * following the "include". 2589 * 2590 * Results: 2591 * None 2592 * 2593 * Side Effects: 2594 * A structure is added to the includes Lst and readProc, lineno, 2595 * fname and curFILE are altered for the new file 2596 *--------------------------------------------------------------------- 2597 */ 2598 static void 2599 ParseTraditionalInclude(char *line) 2600 { 2601 char *cp; /* current position in file spec */ 2602 int done = 0; 2603 int silent = (line[0] != 'i') ? 1 : 0; 2604 char *file = &line[silent + 7]; 2605 char *all_files; 2606 2607 if (DEBUG(PARSE)) { 2608 fprintf(debug_file, "%s: %s\n", __func__, file); 2609 } 2610 2611 /* 2612 * Skip over whitespace 2613 */ 2614 while (isspace((unsigned char)*file)) 2615 file++; 2616 2617 /* 2618 * Substitute for any variables in the file name before trying to 2619 * find the thing. 2620 */ 2621 all_files = Var_Subst(NULL, file, VAR_CMD, VARF_WANTRES); 2622 2623 if (*file == '\0') { 2624 Parse_Error(PARSE_FATAL, 2625 "Filename missing from \"include\""); 2626 goto out; 2627 } 2628 2629 for (file = all_files; !done; file = cp + 1) { 2630 /* Skip to end of line or next whitespace */ 2631 for (cp = file; *cp && !isspace((unsigned char) *cp); cp++) 2632 continue; 2633 2634 if (*cp) 2635 *cp = '\0'; 2636 else 2637 done = 1; 2638 2639 Parse_include_file(file, FALSE, FALSE, silent); 2640 } 2641 out: 2642 free(all_files); 2643 } 2644 #endif 2645 2646 #ifdef GMAKEEXPORT 2647 /*- 2648 *--------------------------------------------------------------------- 2649 * ParseGmakeExport -- 2650 * Parse export <variable>=<value> 2651 * 2652 * And set the environment with it. 2653 * 2654 * Results: 2655 * None 2656 * 2657 * Side Effects: 2658 * None 2659 *--------------------------------------------------------------------- 2660 */ 2661 static void 2662 ParseGmakeExport(char *line) 2663 { 2664 char *variable = &line[6]; 2665 char *value; 2666 2667 if (DEBUG(PARSE)) { 2668 fprintf(debug_file, "%s: %s\n", __func__, variable); 2669 } 2670 2671 /* 2672 * Skip over whitespace 2673 */ 2674 while (isspace((unsigned char)*variable)) 2675 variable++; 2676 2677 for (value = variable; *value && *value != '='; value++) 2678 continue; 2679 2680 if (*value != '=') { 2681 Parse_Error(PARSE_FATAL, 2682 "Variable/Value missing from \"export\""); 2683 return; 2684 } 2685 *value++ = '\0'; /* terminate variable */ 2686 2687 /* 2688 * Expand the value before putting it in the environment. 2689 */ 2690 value = Var_Subst(NULL, value, VAR_CMD, VARF_WANTRES); 2691 setenv(variable, value, 1); 2692 free(value); 2693 } 2694 #endif 2695 2696 /*- 2697 *--------------------------------------------------------------------- 2698 * ParseEOF -- 2699 * Called when EOF is reached in the current file. If we were reading 2700 * an include file, the includes stack is popped and things set up 2701 * to go back to reading the previous file at the previous location. 2702 * 2703 * Results: 2704 * CONTINUE if there's more to do. DONE if not. 2705 * 2706 * Side Effects: 2707 * The old curFILE, is closed. The includes list is shortened. 2708 * lineno, curFILE, and fname are changed if CONTINUE is returned. 2709 *--------------------------------------------------------------------- 2710 */ 2711 static int 2712 ParseEOF(void) 2713 { 2714 char *ptr; 2715 size_t len; 2716 2717 assert(curFile->nextbuf != NULL); 2718 2719 doing_depend = curFile->depending; /* restore this */ 2720 /* get next input buffer, if any */ 2721 ptr = curFile->nextbuf(curFile->nextbuf_arg, &len); 2722 curFile->P_ptr = ptr; 2723 curFile->P_str = ptr; 2724 curFile->P_end = ptr + len; 2725 curFile->lineno = curFile->first_lineno; 2726 if (ptr != NULL) { 2727 /* Iterate again */ 2728 return CONTINUE; 2729 } 2730 2731 /* Ensure the makefile (or loop) didn't have mismatched conditionals */ 2732 Cond_restore_depth(curFile->cond_depth); 2733 2734 if (curFile->lf != NULL) { 2735 loadedfile_destroy(curFile->lf); 2736 curFile->lf = NULL; 2737 } 2738 2739 /* Dispose of curFile info */ 2740 /* Leak curFile->fname because all the gnodes have pointers to it */ 2741 free(curFile->P_str); 2742 free(curFile); 2743 2744 curFile = Lst_DeQueue(includes); 2745 2746 if (curFile == NULL) { 2747 /* We've run out of input */ 2748 Var_Delete(".PARSEDIR", VAR_GLOBAL); 2749 Var_Delete(".PARSEFILE", VAR_GLOBAL); 2750 Var_Delete(".INCLUDEDFROMDIR", VAR_GLOBAL); 2751 Var_Delete(".INCLUDEDFROMFILE", VAR_GLOBAL); 2752 return DONE; 2753 } 2754 2755 if (DEBUG(PARSE)) 2756 fprintf(debug_file, "ParseEOF: returning to file %s, line %d\n", 2757 curFile->fname, curFile->lineno); 2758 2759 /* Restore the PARSEDIR/PARSEFILE variables */ 2760 ParseSetParseFile(curFile->fname); 2761 return (CONTINUE); 2762 } 2763 2764 #define PARSE_RAW 1 2765 #define PARSE_SKIP 2 2766 2767 static char * 2768 ParseGetLine(int flags, int *length) 2769 { 2770 IFile *cf = curFile; 2771 char *ptr; 2772 char ch; 2773 char *line; 2774 char *line_end; 2775 char *escaped; 2776 char *comment; 2777 char *tp; 2778 2779 /* Loop through blank lines and comment lines */ 2780 for (;;) { 2781 cf->lineno++; 2782 line = cf->P_ptr; 2783 ptr = line; 2784 line_end = line; 2785 escaped = NULL; 2786 comment = NULL; 2787 for (;;) { 2788 if (cf->P_end != NULL && ptr == cf->P_end) { 2789 /* end of buffer */ 2790 ch = 0; 2791 break; 2792 } 2793 ch = *ptr; 2794 if (ch == 0 || (ch == '\\' && ptr[1] == 0)) { 2795 if (cf->P_end == NULL) 2796 /* End of string (aka for loop) data */ 2797 break; 2798 /* see if there is more we can parse */ 2799 while (ptr++ < cf->P_end) { 2800 if ((ch = *ptr) == '\n') { 2801 if (ptr > line && ptr[-1] == '\\') 2802 continue; 2803 Parse_Error(PARSE_WARNING, 2804 "Zero byte read from file, skipping rest of line."); 2805 break; 2806 } 2807 } 2808 if (cf->nextbuf != NULL) { 2809 /* 2810 * End of this buffer; return EOF and outer logic 2811 * will get the next one. (eww) 2812 */ 2813 break; 2814 } 2815 Parse_Error(PARSE_FATAL, "Zero byte read from file"); 2816 return NULL; 2817 } 2818 2819 if (ch == '\\') { 2820 /* Don't treat next character as special, remember first one */ 2821 if (escaped == NULL) 2822 escaped = ptr; 2823 if (ptr[1] == '\n') 2824 cf->lineno++; 2825 ptr += 2; 2826 line_end = ptr; 2827 continue; 2828 } 2829 if (ch == '#' && comment == NULL) { 2830 /* Remember first '#' for comment stripping */ 2831 /* Unless previous char was '[', as in modifier :[#] */ 2832 if (!(ptr > line && ptr[-1] == '[')) 2833 comment = line_end; 2834 } 2835 ptr++; 2836 if (ch == '\n') 2837 break; 2838 if (!isspace((unsigned char)ch)) 2839 /* We are not interested in trailing whitespace */ 2840 line_end = ptr; 2841 } 2842 2843 /* Save next 'to be processed' location */ 2844 cf->P_ptr = ptr; 2845 2846 /* Check we have a non-comment, non-blank line */ 2847 if (line_end == line || comment == line) { 2848 if (ch == 0) 2849 /* At end of file */ 2850 return NULL; 2851 /* Parse another line */ 2852 continue; 2853 } 2854 2855 /* We now have a line of data */ 2856 *line_end = 0; 2857 2858 if (flags & PARSE_RAW) { 2859 /* Leave '\' (etc) in line buffer (eg 'for' lines) */ 2860 *length = line_end - line; 2861 return line; 2862 } 2863 2864 if (flags & PARSE_SKIP) { 2865 /* Completely ignore non-directives */ 2866 if (line[0] != '.') 2867 continue; 2868 /* We could do more of the .else/.elif/.endif checks here */ 2869 } 2870 break; 2871 } 2872 2873 /* Brutally ignore anything after a non-escaped '#' in non-commands */ 2874 if (comment != NULL && line[0] != '\t') { 2875 line_end = comment; 2876 *line_end = 0; 2877 } 2878 2879 /* If we didn't see a '\\' then the in-situ data is fine */ 2880 if (escaped == NULL) { 2881 *length = line_end - line; 2882 return line; 2883 } 2884 2885 /* Remove escapes from '\n' and '#' */ 2886 tp = ptr = escaped; 2887 escaped = line; 2888 for (; ; *tp++ = ch) { 2889 ch = *ptr++; 2890 if (ch != '\\') { 2891 if (ch == 0) 2892 break; 2893 continue; 2894 } 2895 2896 ch = *ptr++; 2897 if (ch == 0) { 2898 /* Delete '\\' at end of buffer */ 2899 tp--; 2900 break; 2901 } 2902 2903 if (ch == '#' && line[0] != '\t') 2904 /* Delete '\\' from before '#' on non-command lines */ 2905 continue; 2906 2907 if (ch != '\n') { 2908 /* Leave '\\' in buffer for later */ 2909 *tp++ = '\\'; 2910 /* Make sure we don't delete an escaped ' ' from the line end */ 2911 escaped = tp + 1; 2912 continue; 2913 } 2914 2915 /* Escaped '\n' replace following whitespace with a single ' ' */ 2916 while (ptr[0] == ' ' || ptr[0] == '\t') 2917 ptr++; 2918 ch = ' '; 2919 } 2920 2921 /* Delete any trailing spaces - eg from empty continuations */ 2922 while (tp > escaped && isspace((unsigned char)tp[-1])) 2923 tp--; 2924 2925 *tp = 0; 2926 *length = tp - line; 2927 return line; 2928 } 2929 2930 /*- 2931 *--------------------------------------------------------------------- 2932 * ParseReadLine -- 2933 * Read an entire line from the input file. Called only by Parse_File. 2934 * 2935 * Results: 2936 * A line w/o its newline 2937 * 2938 * Side Effects: 2939 * Only those associated with reading a character 2940 *--------------------------------------------------------------------- 2941 */ 2942 static char * 2943 ParseReadLine(void) 2944 { 2945 char *line; /* Result */ 2946 int lineLength; /* Length of result */ 2947 int lineno; /* Saved line # */ 2948 int rval; 2949 2950 for (;;) { 2951 line = ParseGetLine(0, &lineLength); 2952 if (line == NULL) 2953 return NULL; 2954 2955 if (line[0] != '.') 2956 return line; 2957 2958 /* 2959 * The line might be a conditional. Ask the conditional module 2960 * about it and act accordingly 2961 */ 2962 switch (Cond_Eval(line)) { 2963 case COND_SKIP: 2964 /* Skip to next conditional that evaluates to COND_PARSE. */ 2965 do { 2966 line = ParseGetLine(PARSE_SKIP, &lineLength); 2967 } while (line && Cond_Eval(line) != COND_PARSE); 2968 if (line == NULL) 2969 break; 2970 continue; 2971 case COND_PARSE: 2972 continue; 2973 case COND_INVALID: /* Not a conditional line */ 2974 /* Check for .for loops */ 2975 rval = For_Eval(line); 2976 if (rval == 0) 2977 /* Not a .for line */ 2978 break; 2979 if (rval < 0) 2980 /* Syntax error - error printed, ignore line */ 2981 continue; 2982 /* Start of a .for loop */ 2983 lineno = curFile->lineno; 2984 /* Accumulate loop lines until matching .endfor */ 2985 do { 2986 line = ParseGetLine(PARSE_RAW, &lineLength); 2987 if (line == NULL) { 2988 Parse_Error(PARSE_FATAL, 2989 "Unexpected end of file in for loop."); 2990 break; 2991 } 2992 } while (For_Accum(line)); 2993 /* Stash each iteration as a new 'input file' */ 2994 For_Run(lineno); 2995 /* Read next line from for-loop buffer */ 2996 continue; 2997 } 2998 return (line); 2999 } 3000 } 3001 3002 /*- 3003 *----------------------------------------------------------------------- 3004 * ParseFinishLine -- 3005 * Handle the end of a dependency group. 3006 * 3007 * Results: 3008 * Nothing. 3009 * 3010 * Side Effects: 3011 * inLine set FALSE. 'targets' list destroyed. 3012 * 3013 *----------------------------------------------------------------------- 3014 */ 3015 static void 3016 ParseFinishLine(void) 3017 { 3018 if (inLine) { 3019 Lst_ForEach(targets, Suff_EndTransform, NULL); 3020 Lst_Destroy(targets, ParseHasCommands); 3021 targets = NULL; 3022 inLine = FALSE; 3023 } 3024 } 3025 3026 3027 /*- 3028 *--------------------------------------------------------------------- 3029 * Parse_File -- 3030 * Parse a file into its component parts, incorporating it into the 3031 * current dependency graph. This is the main function and controls 3032 * almost every other function in this module 3033 * 3034 * Input: 3035 * name the name of the file being read 3036 * fd Open file to makefile to parse 3037 * 3038 * Results: 3039 * None 3040 * 3041 * Side Effects: 3042 * closes fd. 3043 * Loads. Nodes are added to the list of all targets, nodes and links 3044 * are added to the dependency graph. etc. etc. etc. 3045 *--------------------------------------------------------------------- 3046 */ 3047 void 3048 Parse_File(const char *name, int fd) 3049 { 3050 char *cp; /* pointer into the line */ 3051 char *line; /* the line we're working on */ 3052 struct loadedfile *lf; 3053 3054 lf = loadfile(name, fd); 3055 3056 inLine = FALSE; 3057 fatals = 0; 3058 3059 if (name == NULL) { 3060 name = "(stdin)"; 3061 } 3062 3063 Parse_SetInput(name, 0, -1, loadedfile_nextbuf, lf); 3064 curFile->lf = lf; 3065 3066 do { 3067 for (; (line = ParseReadLine()) != NULL; ) { 3068 if (DEBUG(PARSE)) 3069 fprintf(debug_file, "ParseReadLine (%d): '%s'\n", 3070 curFile->lineno, line); 3071 if (*line == '.') { 3072 /* 3073 * Lines that begin with the special character may be 3074 * include or undef directives. 3075 * On the other hand they can be suffix rules (.c.o: ...) 3076 * or just dependencies for filenames that start '.'. 3077 */ 3078 for (cp = line + 1; isspace((unsigned char)*cp); cp++) { 3079 continue; 3080 } 3081 if (IsInclude(cp, FALSE)) { 3082 ParseDoInclude(cp); 3083 continue; 3084 } 3085 if (strncmp(cp, "undef", 5) == 0) { 3086 char *cp2; 3087 for (cp += 5; isspace((unsigned char) *cp); cp++) 3088 continue; 3089 for (cp2 = cp; !isspace((unsigned char) *cp2) && 3090 (*cp2 != '\0'); cp2++) 3091 continue; 3092 *cp2 = '\0'; 3093 Var_Delete(cp, VAR_GLOBAL); 3094 continue; 3095 } else if (strncmp(cp, "export", 6) == 0) { 3096 for (cp += 6; isspace((unsigned char) *cp); cp++) 3097 continue; 3098 Var_Export(cp, 1); 3099 continue; 3100 } else if (strncmp(cp, "unexport", 8) == 0) { 3101 Var_UnExport(cp); 3102 continue; 3103 } else if (strncmp(cp, "info", 4) == 0 || 3104 strncmp(cp, "error", 5) == 0 || 3105 strncmp(cp, "warning", 7) == 0) { 3106 if (ParseMessage(cp)) 3107 continue; 3108 } 3109 } 3110 3111 if (*line == '\t') { 3112 /* 3113 * If a line starts with a tab, it can only hope to be 3114 * a creation command. 3115 */ 3116 cp = line + 1; 3117 shellCommand: 3118 for (; isspace ((unsigned char)*cp); cp++) { 3119 continue; 3120 } 3121 if (*cp) { 3122 if (!inLine) 3123 Parse_Error(PARSE_FATAL, 3124 "Unassociated shell command \"%s\"", 3125 cp); 3126 /* 3127 * So long as it's not a blank line and we're actually 3128 * in a dependency spec, add the command to the list of 3129 * commands of all targets in the dependency spec 3130 */ 3131 if (targets) { 3132 cp = bmake_strdup(cp); 3133 Lst_ForEach(targets, ParseAddCmd, cp); 3134 #ifdef CLEANUP 3135 Lst_AtEnd(targCmds, cp); 3136 #endif 3137 } 3138 } 3139 continue; 3140 } 3141 3142 #ifdef SYSVINCLUDE 3143 if (IsSysVInclude(line)) { 3144 /* 3145 * It's an S3/S5-style "include". 3146 */ 3147 ParseTraditionalInclude(line); 3148 continue; 3149 } 3150 #endif 3151 #ifdef GMAKEEXPORT 3152 if (strncmp(line, "export", 6) == 0 && 3153 isspace((unsigned char) line[6]) && 3154 strchr(line, ':') == NULL) { 3155 /* 3156 * It's a Gmake "export". 3157 */ 3158 ParseGmakeExport(line); 3159 continue; 3160 } 3161 #endif 3162 if (Parse_IsVar(line)) { 3163 ParseFinishLine(); 3164 Parse_DoVar(line, VAR_GLOBAL); 3165 continue; 3166 } 3167 3168 #ifndef POSIX 3169 /* 3170 * To make life easier on novices, if the line is indented we 3171 * first make sure the line has a dependency operator in it. 3172 * If it doesn't have an operator and we're in a dependency 3173 * line's script, we assume it's actually a shell command 3174 * and add it to the current list of targets. 3175 */ 3176 cp = line; 3177 if (isspace((unsigned char) line[0])) { 3178 while ((*cp != '\0') && isspace((unsigned char) *cp)) 3179 cp++; 3180 while (*cp && (ParseIsEscaped(line, cp) || 3181 (*cp != ':') && (*cp != '!'))) { 3182 cp++; 3183 } 3184 if (*cp == '\0') { 3185 if (inLine) { 3186 Parse_Error(PARSE_WARNING, 3187 "Shell command needs a leading tab"); 3188 goto shellCommand; 3189 } 3190 } 3191 } 3192 #endif 3193 ParseFinishLine(); 3194 3195 /* 3196 * For some reason - probably to make the parser impossible - 3197 * a ';' can be used to separate commands from dependencies. 3198 * Attempt to avoid ';' inside substitution patterns. 3199 */ 3200 { 3201 int level = 0; 3202 3203 for (cp = line; *cp != 0; cp++) { 3204 if (*cp == '\\' && cp[1] != 0) { 3205 cp++; 3206 continue; 3207 } 3208 if (*cp == '$' && 3209 (cp[1] == '(' || cp[1] == '{')) { 3210 level++; 3211 continue; 3212 } 3213 if (level > 0) { 3214 if (*cp == ')' || *cp == '}') { 3215 level--; 3216 continue; 3217 } 3218 } else if (*cp == ';') { 3219 break; 3220 } 3221 } 3222 } 3223 if (*cp != 0) 3224 /* Terminate the dependency list at the ';' */ 3225 *cp++ = 0; 3226 else 3227 cp = NULL; 3228 3229 /* 3230 * We now know it's a dependency line so it needs to have all 3231 * variables expanded before being parsed. Tell the variable 3232 * module to complain if some variable is undefined... 3233 */ 3234 line = Var_Subst(NULL, line, VAR_CMD, VARF_UNDEFERR|VARF_WANTRES); 3235 3236 /* 3237 * Need a non-circular list for the target nodes 3238 */ 3239 if (targets) 3240 Lst_Destroy(targets, NULL); 3241 3242 targets = Lst_Init(FALSE); 3243 inLine = TRUE; 3244 3245 ParseDoDependency(line); 3246 free(line); 3247 3248 /* If there were commands after a ';', add them now */ 3249 if (cp != NULL) { 3250 goto shellCommand; 3251 } 3252 } 3253 /* 3254 * Reached EOF, but it may be just EOF of an include file... 3255 */ 3256 } while (ParseEOF() == CONTINUE); 3257 3258 if (fatals) { 3259 (void)fflush(stdout); 3260 (void)fprintf(stderr, 3261 "%s: Fatal errors encountered -- cannot continue", 3262 progname); 3263 PrintOnError(NULL, NULL); 3264 exit(1); 3265 } 3266 } 3267 3268 /*- 3269 *--------------------------------------------------------------------- 3270 * Parse_Init -- 3271 * initialize the parsing module 3272 * 3273 * Results: 3274 * none 3275 * 3276 * Side Effects: 3277 * the parseIncPath list is initialized... 3278 *--------------------------------------------------------------------- 3279 */ 3280 void 3281 Parse_Init(void) 3282 { 3283 mainNode = NULL; 3284 parseIncPath = Lst_Init(FALSE); 3285 sysIncPath = Lst_Init(FALSE); 3286 defIncPath = Lst_Init(FALSE); 3287 includes = Lst_Init(FALSE); 3288 #ifdef CLEANUP 3289 targCmds = Lst_Init(FALSE); 3290 #endif 3291 } 3292 3293 void 3294 Parse_End(void) 3295 { 3296 #ifdef CLEANUP 3297 Lst_Destroy(targCmds, (FreeProc *)free); 3298 if (targets) 3299 Lst_Destroy(targets, NULL); 3300 Lst_Destroy(defIncPath, Dir_Destroy); 3301 Lst_Destroy(sysIncPath, Dir_Destroy); 3302 Lst_Destroy(parseIncPath, Dir_Destroy); 3303 Lst_Destroy(includes, NULL); /* Should be empty now */ 3304 #endif 3305 } 3306 3307 3308 /*- 3309 *----------------------------------------------------------------------- 3310 * Parse_MainName -- 3311 * Return a Lst of the main target to create for main()'s sake. If 3312 * no such target exists, we Punt with an obnoxious error message. 3313 * 3314 * Results: 3315 * A Lst of the single node to create. 3316 * 3317 * Side Effects: 3318 * None. 3319 * 3320 *----------------------------------------------------------------------- 3321 */ 3322 Lst 3323 Parse_MainName(void) 3324 { 3325 Lst mainList; /* result list */ 3326 3327 mainList = Lst_Init(FALSE); 3328 3329 if (mainNode == NULL) { 3330 Punt("no target to make."); 3331 /*NOTREACHED*/ 3332 } else if (mainNode->type & OP_DOUBLEDEP) { 3333 (void)Lst_AtEnd(mainList, mainNode); 3334 Lst_Concat(mainList, mainNode->cohorts, LST_CONCNEW); 3335 } 3336 else 3337 (void)Lst_AtEnd(mainList, mainNode); 3338 Var_Append(".TARGETS", mainNode->name, VAR_GLOBAL); 3339 return (mainList); 3340 } 3341 3342 /*- 3343 *----------------------------------------------------------------------- 3344 * ParseMark -- 3345 * Add the filename and lineno to the GNode so that we remember 3346 * where it was first defined. 3347 * 3348 * Side Effects: 3349 * None. 3350 * 3351 *----------------------------------------------------------------------- 3352 */ 3353 static void 3354 ParseMark(GNode *gn) 3355 { 3356 gn->fname = curFile->fname; 3357 gn->lineno = curFile->lineno; 3358 } 3359
Indexes created Mon Sep 22 21:09:42 GMT 2025