parse.c revision 1.244
1 /* $NetBSD: parse.c,v 1.244 2020/08/01 09:25:36 rillig Exp $ */ 2 3 /* 4 * Copyright (c) 1988, 1989, 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Adam de Boor. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 /* 36 * Copyright (c) 1989 by Berkeley Softworks 37 * All rights reserved. 38 * 39 * This code is derived from software contributed to Berkeley by 40 * Adam de Boor. 41 * 42 * Redistribution and use in source and binary forms, with or without 43 * modification, are permitted provided that the following conditions 44 * are met: 45 * 1. Redistributions of source code must retain the above copyright 46 * notice, this list of conditions and the following disclaimer. 47 * 2. Redistributions in binary form must reproduce the above copyright 48 * notice, this list of conditions and the following disclaimer in the 49 * documentation and/or other materials provided with the distribution. 50 * 3. All advertising materials mentioning features or use of this software 51 * must display the following acknowledgement: 52 * This product includes software developed by the University of 53 * California, Berkeley and its contributors. 54 * 4. Neither the name of the University nor the names of its contributors 55 * may be used to endorse or promote products derived from this software 56 * without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 68 * SUCH DAMAGE. 69 */ 70 71 #ifndef MAKE_NATIVE 72 static char rcsid[] = "$NetBSD: parse.c,v 1.244 2020/08/01 09:25:36 rillig Exp $"; 73 #else 74 #include <sys/cdefs.h> 75 #ifndef lint 76 #if 0 77 static char sccsid[] = "@(#)parse.c 8.3 (Berkeley) 3/19/94"; 78 #else 79 __RCSID("$NetBSD: parse.c,v 1.244 2020/08/01 09:25:36 rillig Exp $"); 80 #endif 81 #endif /* not lint */ 82 #endif 83 84 /*- 85 * parse.c -- 86 * Functions to parse a makefile. 87 * 88 * One function, Parse_Init, must be called before any functions 89 * in this module are used. After that, the function Parse_File is the 90 * main entry point and controls most of the other functions in this 91 * module. 92 * 93 * Most important structures are kept in Lsts. Directories for 94 * the .include "..." function are kept in the 'parseIncPath' Lst, while 95 * those for the .include <...> are kept in the 'sysIncPath' Lst. The 96 * targets currently being defined are kept in the 'targets' Lst. 97 * 98 * The variables 'fname' and 'lineno' are used to track the name 99 * of the current file and the line number in that file so that error 100 * messages can be more meaningful. 101 * 102 * Interface: 103 * Parse_Init Initialization function which must be 104 * called before anything else in this module 105 * is used. 106 * 107 * Parse_End Cleanup the module 108 * 109 * Parse_File Function used to parse a makefile. It must 110 * be given the name of the file, which should 111 * already have been opened, and a function 112 * to call to read a character from the file. 113 * 114 * Parse_IsVar Returns TRUE if the given line is a 115 * variable assignment. Used by MainParseArgs 116 * to determine if an argument is a target 117 * or a variable assignment. Used internally 118 * for pretty much the same thing... 119 * 120 * Parse_Error Function called when an error occurs in 121 * parsing. Used by the variable and 122 * conditional modules. 123 * Parse_MainName Returns a Lst of the main target to create. 124 */ 125 126 #include <sys/types.h> 127 #include <sys/mman.h> 128 #include <sys/stat.h> 129 #include <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 char dirbuf[MAXPATHLEN+1]; 674 675 (void)fprintf(f, "%s: ", progname); 676 677 if (cfname != NULL) { 678 (void)fprintf(f, "\""); 679 if (*cfname != '/' && strcmp(cfname, "(stdin)") != 0) { 680 char *cp, *cp2; 681 const char *dir, *fname; 682 683 /* 684 * Nothing is more annoying than not knowing 685 * which Makefile is the culprit; we try ${.PARSEDIR} 686 * and apply realpath(3) if not absolute. 687 */ 688 dir = Var_Value(".PARSEDIR", VAR_GLOBAL, &cp); 689 if (dir == NULL) 690 dir = "."; 691 if (*dir != '/') { 692 dir = realpath(dir, dirbuf); 693 } 694 fname = Var_Value(".PARSEFILE", VAR_GLOBAL, &cp2); 695 if (fname == NULL) { 696 if ((fname = strrchr(cfname, '/'))) 697 fname++; 698 else 699 fname = cfname; 700 } 701 (void)fprintf(f, "%s/%s", dir, fname); 702 free(cp2); 703 free(cp); 704 } else 705 (void)fprintf(f, "%s", cfname); 706 707 (void)fprintf(f, "\" line %d: ", (int)clineno); 708 } 709 if (type == PARSE_WARNING) 710 (void)fprintf(f, "warning: "); 711 (void)vfprintf(f, fmt, ap); 712 (void)fprintf(f, "\n"); 713 (void)fflush(f); 714 if (type == PARSE_INFO) 715 return; 716 if (type == PARSE_FATAL || parseWarnFatal) 717 fatals += 1; 718 if (parseWarnFatal && !fatal_warning_error_printed) { 719 Error("parsing warnings being treated as errors"); 720 fatal_warning_error_printed = TRUE; 721 } 722 } 723 724 /*- 725 * ParseErrorInternal -- 726 * Error function 727 * 728 * Results: 729 * None 730 * 731 * Side Effects: 732 * None 733 */ 734 /* VARARGS */ 735 static void 736 ParseErrorInternal(const char *cfname, size_t clineno, int type, 737 const char *fmt, ...) 738 { 739 va_list ap; 740 741 va_start(ap, fmt); 742 (void)fflush(stdout); 743 ParseVErrorInternal(stderr, cfname, clineno, type, fmt, ap); 744 va_end(ap); 745 746 if (debug_file != stderr && debug_file != stdout) { 747 va_start(ap, fmt); 748 ParseVErrorInternal(debug_file, cfname, clineno, type, fmt, ap); 749 va_end(ap); 750 } 751 } 752 753 /*- 754 * Parse_Error -- 755 * External interface to ParseErrorInternal; uses the default filename 756 * Line number. 757 * 758 * Results: 759 * None 760 * 761 * Side Effects: 762 * None 763 */ 764 /* VARARGS */ 765 void 766 Parse_Error(int type, const char *fmt, ...) 767 { 768 va_list ap; 769 const char *fname; 770 size_t lineno; 771 772 if (curFile == NULL) { 773 fname = NULL; 774 lineno = 0; 775 } else { 776 fname = curFile->fname; 777 lineno = curFile->lineno; 778 } 779 780 va_start(ap, fmt); 781 (void)fflush(stdout); 782 ParseVErrorInternal(stderr, fname, lineno, type, fmt, ap); 783 va_end(ap); 784 785 if (debug_file != stderr && debug_file != stdout) { 786 va_start(ap, fmt); 787 ParseVErrorInternal(debug_file, fname, lineno, type, fmt, ap); 788 va_end(ap); 789 } 790 } 791 792 793 /* 794 * ParseMessage 795 * Parse a .info .warning or .error directive 796 * 797 * The input is the line minus the ".". We substitute 798 * variables, print the message and exit(1) (for .error) or just print 799 * a warning if the directive is malformed. 800 */ 801 static Boolean 802 ParseMessage(char *line) 803 { 804 int mtype; 805 806 switch(*line) { 807 case 'i': 808 mtype = PARSE_INFO; 809 break; 810 case 'w': 811 mtype = PARSE_WARNING; 812 break; 813 case 'e': 814 mtype = PARSE_FATAL; 815 break; 816 default: 817 Parse_Error(PARSE_WARNING, "invalid syntax: \".%s\"", line); 818 return FALSE; 819 } 820 821 while (isalpha((unsigned char)*line)) 822 line++; 823 if (!isspace((unsigned char)*line)) 824 return FALSE; /* not for us */ 825 while (isspace((unsigned char)*line)) 826 line++; 827 828 line = Var_Subst(line, VAR_CMD, VARE_WANTRES); 829 Parse_Error(mtype, "%s", line); 830 free(line); 831 832 if (mtype == PARSE_FATAL) { 833 /* Terminate immediately. */ 834 exit(1); 835 } 836 return TRUE; 837 } 838 839 /*- 840 *--------------------------------------------------------------------- 841 * ParseLinkSrc -- 842 * Link the parent node to its new child. Used in a Lst_ForEach by 843 * ParseDoDependency. If the specType isn't 'Not', the parent 844 * isn't linked as a parent of the child. 845 * 846 * Input: 847 * pgnp The parent node 848 * cgpn The child node 849 * 850 * Results: 851 * Always = 0 852 * 853 * Side Effects: 854 * New elements are added to the parents list of cgn and the 855 * children list of cgn. the unmade field of pgn is updated 856 * to reflect the additional child. 857 *--------------------------------------------------------------------- 858 */ 859 static int 860 ParseLinkSrc(void *pgnp, void *cgnp) 861 { 862 GNode *pgn = (GNode *)pgnp; 863 GNode *cgn = (GNode *)cgnp; 864 865 if ((pgn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (pgn->cohorts)) 866 pgn = (GNode *)Lst_Datum(Lst_Last(pgn->cohorts)); 867 (void)Lst_AtEnd(pgn->children, cgn); 868 if (specType == Not) 869 (void)Lst_AtEnd(cgn->parents, pgn); 870 pgn->unmade += 1; 871 if (DEBUG(PARSE)) { 872 fprintf(debug_file, "# %s: added child %s - %s\n", __func__, 873 pgn->name, cgn->name); 874 Targ_PrintNode(pgn, 0); 875 Targ_PrintNode(cgn, 0); 876 } 877 return 0; 878 } 879 880 /*- 881 *--------------------------------------------------------------------- 882 * ParseDoOp -- 883 * Apply the parsed operator to the given target node. Used in a 884 * Lst_ForEach call by ParseDoDependency once all targets have 885 * been found and their operator parsed. If the previous and new 886 * operators are incompatible, a major error is taken. 887 * 888 * Input: 889 * gnp The node to which the operator is to be applied 890 * opp The operator to apply 891 * 892 * Results: 893 * Always 0 894 * 895 * Side Effects: 896 * The type field of the node is altered to reflect any new bits in 897 * the op. 898 *--------------------------------------------------------------------- 899 */ 900 static int 901 ParseDoOp(void *gnp, void *opp) 902 { 903 GNode *gn = (GNode *)gnp; 904 int op = *(int *)opp; 905 /* 906 * If the dependency mask of the operator and the node don't match and 907 * the node has actually had an operator applied to it before, and 908 * the operator actually has some dependency information in it, complain. 909 */ 910 if (((op & OP_OPMASK) != (gn->type & OP_OPMASK)) && 911 !OP_NOP(gn->type) && !OP_NOP(op)) 912 { 913 Parse_Error(PARSE_FATAL, "Inconsistent operator for %s", gn->name); 914 return 1; 915 } 916 917 if (op == OP_DOUBLEDEP && (gn->type & OP_OPMASK) == OP_DOUBLEDEP) { 918 /* 919 * If the node was the object of a :: operator, we need to create a 920 * new instance of it for the children and commands on this dependency 921 * line. The new instance is placed on the 'cohorts' list of the 922 * initial one (note the initial one is not on its own cohorts list) 923 * and the new instance is linked to all parents of the initial 924 * instance. 925 */ 926 GNode *cohort; 927 928 /* 929 * Propagate copied bits to the initial node. They'll be propagated 930 * back to the rest of the cohorts later. 931 */ 932 gn->type |= op & ~OP_OPMASK; 933 934 cohort = Targ_FindNode(gn->name, TARG_NOHASH); 935 if (doing_depend) 936 ParseMark(cohort); 937 /* 938 * Make the cohort invisible as well to avoid duplicating it into 939 * other variables. True, parents of this target won't tend to do 940 * anything with their local variables, but better safe than 941 * sorry. (I think this is pointless now, since the relevant list 942 * traversals will no longer see this node anyway. -mycroft) 943 */ 944 cohort->type = op | OP_INVISIBLE; 945 (void)Lst_AtEnd(gn->cohorts, cohort); 946 cohort->centurion = gn; 947 gn->unmade_cohorts += 1; 948 snprintf(cohort->cohort_num, sizeof cohort->cohort_num, "#%d", 949 gn->unmade_cohorts); 950 } else { 951 /* 952 * We don't want to nuke any previous flags (whatever they were) so we 953 * just OR the new operator into the old 954 */ 955 gn->type |= op; 956 } 957 958 return 0; 959 } 960 961 /*- 962 *--------------------------------------------------------------------- 963 * ParseDoSrc -- 964 * Given the name of a source, figure out if it is an attribute 965 * and apply it to the targets if it is. Else decide if there is 966 * some attribute which should be applied *to* the source because 967 * of some special target and apply it if so. Otherwise, make the 968 * source be a child of the targets in the list 'targets' 969 * 970 * Input: 971 * tOp operator (if any) from special targets 972 * src name of the source to handle 973 * 974 * Results: 975 * None 976 * 977 * Side Effects: 978 * Operator bits may be added to the list of targets or to the source. 979 * The targets may have a new source added to their lists of children. 980 *--------------------------------------------------------------------- 981 */ 982 static void 983 ParseDoSrc(int tOp, const char *src) 984 { 985 GNode *gn = NULL; 986 static int wait_number = 0; 987 char wait_src[16]; 988 989 if (*src == '.' && isupper ((unsigned char)src[1])) { 990 int keywd = ParseFindKeyword(src); 991 if (keywd != -1) { 992 int op = parseKeywords[keywd].op; 993 if (op != 0) { 994 Lst_ForEach(targets, ParseDoOp, &op); 995 return; 996 } 997 if (parseKeywords[keywd].spec == Wait) { 998 /* 999 * We add a .WAIT node in the dependency list. 1000 * After any dynamic dependencies (and filename globbing) 1001 * have happened, it is given a dependency on the each 1002 * previous child back to and previous .WAIT node. 1003 * The next child won't be scheduled until the .WAIT node 1004 * is built. 1005 * We give each .WAIT node a unique name (mainly for diag). 1006 */ 1007 snprintf(wait_src, sizeof wait_src, ".WAIT_%u", ++wait_number); 1008 gn = Targ_FindNode(wait_src, TARG_NOHASH); 1009 if (doing_depend) 1010 ParseMark(gn); 1011 gn->type = OP_WAIT | OP_PHONY | OP_DEPENDS | OP_NOTMAIN; 1012 Lst_ForEach(targets, ParseLinkSrc, gn); 1013 return; 1014 } 1015 } 1016 } 1017 1018 switch (specType) { 1019 case Main: 1020 /* 1021 * If we have noted the existence of a .MAIN, it means we need 1022 * to add the sources of said target to the list of things 1023 * to create. The string 'src' is likely to be free, so we 1024 * must make a new copy of it. Note that this will only be 1025 * invoked if the user didn't specify a target on the command 1026 * line. This is to allow #ifmake's to succeed, or something... 1027 */ 1028 (void)Lst_AtEnd(create, bmake_strdup(src)); 1029 /* 1030 * Add the name to the .TARGETS variable as well, so the user can 1031 * employ that, if desired. 1032 */ 1033 Var_Append(".TARGETS", src, VAR_GLOBAL); 1034 return; 1035 1036 case Order: 1037 /* 1038 * Create proper predecessor/successor links between the previous 1039 * source and the current one. 1040 */ 1041 gn = Targ_FindNode(src, TARG_CREATE); 1042 if (doing_depend) 1043 ParseMark(gn); 1044 if (predecessor != NULL) { 1045 (void)Lst_AtEnd(predecessor->order_succ, gn); 1046 (void)Lst_AtEnd(gn->order_pred, predecessor); 1047 if (DEBUG(PARSE)) { 1048 fprintf(debug_file, "# %s: added Order dependency %s - %s\n", 1049 __func__, predecessor->name, gn->name); 1050 Targ_PrintNode(predecessor, 0); 1051 Targ_PrintNode(gn, 0); 1052 } 1053 } 1054 /* 1055 * The current source now becomes the predecessor for the next one. 1056 */ 1057 predecessor = gn; 1058 break; 1059 1060 default: 1061 /* 1062 * If the source is not an attribute, we need to find/create 1063 * a node for it. After that we can apply any operator to it 1064 * from a special target or link it to its parents, as 1065 * appropriate. 1066 * 1067 * In the case of a source that was the object of a :: operator, 1068 * the attribute is applied to all of its instances (as kept in 1069 * the 'cohorts' list of the node) or all the cohorts are linked 1070 * to all the targets. 1071 */ 1072 1073 /* Find/create the 'src' node and attach to all targets */ 1074 gn = Targ_FindNode(src, TARG_CREATE); 1075 if (doing_depend) 1076 ParseMark(gn); 1077 if (tOp) { 1078 gn->type |= tOp; 1079 } else { 1080 Lst_ForEach(targets, ParseLinkSrc, gn); 1081 } 1082 break; 1083 } 1084 } 1085 1086 /*- 1087 *----------------------------------------------------------------------- 1088 * ParseFindMain -- 1089 * Find a real target in the list and set it to be the main one. 1090 * Called by ParseDoDependency when a main target hasn't been found 1091 * yet. 1092 * 1093 * Input: 1094 * gnp Node to examine 1095 * 1096 * Results: 1097 * 0 if main not found yet, 1 if it is. 1098 * 1099 * Side Effects: 1100 * mainNode is changed and Targ_SetMain is called. 1101 * 1102 *----------------------------------------------------------------------- 1103 */ 1104 static int 1105 ParseFindMain(void *gnp, void *dummy MAKE_ATTR_UNUSED) 1106 { 1107 GNode *gn = (GNode *)gnp; 1108 if (!(gn->type & OP_NOTARGET)) { 1109 mainNode = gn; 1110 Targ_SetMain(gn); 1111 return 1; 1112 } else { 1113 return 0; 1114 } 1115 } 1116 1117 /*- 1118 *----------------------------------------------------------------------- 1119 * ParseAddDir -- 1120 * Front-end for Dir_AddDir to make sure Lst_ForEach keeps going 1121 * 1122 * Results: 1123 * === 0 1124 * 1125 * Side Effects: 1126 * See Dir_AddDir. 1127 * 1128 *----------------------------------------------------------------------- 1129 */ 1130 static int 1131 ParseAddDir(void *path, void *name) 1132 { 1133 (void)Dir_AddDir((Lst) path, (char *)name); 1134 return 0; 1135 } 1136 1137 /*- 1138 *----------------------------------------------------------------------- 1139 * ParseClearPath -- 1140 * Front-end for Dir_ClearPath to make sure Lst_ForEach keeps going 1141 * 1142 * Results: 1143 * === 0 1144 * 1145 * Side Effects: 1146 * See Dir_ClearPath 1147 * 1148 *----------------------------------------------------------------------- 1149 */ 1150 static int 1151 ParseClearPath(void *path, void *dummy MAKE_ATTR_UNUSED) 1152 { 1153 Dir_ClearPath((Lst) path); 1154 return 0; 1155 } 1156 1157 /*- 1158 *--------------------------------------------------------------------- 1159 * ParseDoDependency -- 1160 * Parse the dependency line in line. 1161 * 1162 * Input: 1163 * line the line to parse 1164 * 1165 * Results: 1166 * None 1167 * 1168 * Side Effects: 1169 * The nodes of the sources are linked as children to the nodes of the 1170 * targets. Some nodes may be created. 1171 * 1172 * We parse a dependency line by first extracting words from the line and 1173 * finding nodes in the list of all targets with that name. This is done 1174 * until a character is encountered which is an operator character. Currently 1175 * these are only ! and :. At this point the operator is parsed and the 1176 * pointer into the line advanced until the first source is encountered. 1177 * The parsed operator is applied to each node in the 'targets' list, 1178 * which is where the nodes found for the targets are kept, by means of 1179 * the ParseDoOp function. 1180 * The sources are read in much the same way as the targets were except 1181 * that now they are expanded using the wildcarding scheme of the C-Shell 1182 * and all instances of the resulting words in the list of all targets 1183 * are found. Each of the resulting nodes is then linked to each of the 1184 * targets as one of its children. 1185 * Certain targets are handled specially. These are the ones detailed 1186 * by the specType variable. 1187 * The storing of transformation rules is also taken care of here. 1188 * A target is recognized as a transformation rule by calling 1189 * Suff_IsTransform. If it is a transformation rule, its node is gotten 1190 * from the suffix module via Suff_AddTransform rather than the standard 1191 * Targ_FindNode in the target module. 1192 *--------------------------------------------------------------------- 1193 */ 1194 static void 1195 ParseDoDependency(char *line) 1196 { 1197 char *cp; /* our current position */ 1198 GNode *gn = NULL; /* a general purpose temporary node */ 1199 int op; /* the operator on the line */ 1200 char savec; /* a place to save a character */ 1201 Lst paths; /* List of search paths to alter when parsing 1202 * a list of .PATH targets */ 1203 int tOp; /* operator from special target */ 1204 Lst sources; /* list of archive source names after 1205 * expansion */ 1206 Lst curTargs; /* list of target names to be found and added 1207 * to the targets list */ 1208 char *lstart = line; 1209 1210 if (DEBUG(PARSE)) 1211 fprintf(debug_file, "ParseDoDependency(%s)\n", line); 1212 tOp = 0; 1213 1214 specType = Not; 1215 paths = NULL; 1216 1217 curTargs = Lst_Init(FALSE); 1218 1219 /* 1220 * First, grind through the targets. 1221 */ 1222 1223 do { 1224 /* 1225 * Here LINE points to the beginning of the next word, and 1226 * LSTART points to the actual beginning of the line. 1227 */ 1228 1229 /* Find the end of the next word. */ 1230 for (cp = line; *cp && (ParseIsEscaped(lstart, cp) || 1231 !(isspace((unsigned char)*cp) || 1232 *cp == '!' || *cp == ':' || *cp == LPAREN)); 1233 cp++) { 1234 if (*cp == '$') { 1235 /* 1236 * Must be a dynamic source (would have been expanded 1237 * otherwise), so call the Var module to parse the puppy 1238 * so we can safely advance beyond it...There should be 1239 * no errors in this, as they would have been discovered 1240 * in the initial Var_Subst and we wouldn't be here. 1241 */ 1242 int length; 1243 void *freeIt; 1244 1245 (void)Var_Parse(cp, VAR_CMD, VARE_UNDEFERR|VARE_WANTRES, 1246 &length, &freeIt); 1247 free(freeIt); 1248 cp += length-1; 1249 } 1250 } 1251 1252 /* 1253 * If the word is followed by a left parenthesis, it's the 1254 * name of an object file inside an archive (ar file). 1255 */ 1256 if (!ParseIsEscaped(lstart, cp) && *cp == LPAREN) { 1257 /* 1258 * Archives must be handled specially to make sure the OP_ARCHV 1259 * flag is set in their 'type' field, for one thing, and because 1260 * things like "archive(file1.o file2.o file3.o)" are permissible. 1261 * Arch_ParseArchive will set 'line' to be the first non-blank 1262 * after the archive-spec. It creates/finds nodes for the members 1263 * and places them on the given list, returning SUCCESS if all 1264 * went well and FAILURE if there was an error in the 1265 * specification. On error, line should remain untouched. 1266 */ 1267 if (Arch_ParseArchive(&line, targets, VAR_CMD) != SUCCESS) { 1268 Parse_Error(PARSE_FATAL, 1269 "Error in archive specification: \"%s\"", line); 1270 goto out; 1271 } else { 1272 /* Done with this word; on to the next. */ 1273 cp = line; 1274 continue; 1275 } 1276 } 1277 1278 if (!*cp) { 1279 /* 1280 * We got to the end of the line while we were still 1281 * looking at targets. 1282 * 1283 * Ending a dependency line without an operator is a Bozo 1284 * no-no. As a heuristic, this is also often triggered by 1285 * undetected conflicts from cvs/rcs merges. 1286 */ 1287 if ((strncmp(line, "<<<<<<", 6) == 0) || 1288 (strncmp(line, "======", 6) == 0) || 1289 (strncmp(line, ">>>>>>", 6) == 0)) 1290 Parse_Error(PARSE_FATAL, 1291 "Makefile appears to contain unresolved cvs/rcs/??? merge conflicts"); 1292 else if (lstart[0] == '.') { 1293 const char *dirstart = lstart + 1; 1294 while (isspace((unsigned char)*dirstart)) 1295 dirstart++; 1296 const char *dirend = dirstart; 1297 while (isalnum((unsigned char)*dirend) || *dirend == '-') 1298 dirend++; 1299 Parse_Error(PARSE_FATAL, "Unknown directive \"%.*s\"", 1300 (int)(dirend - dirstart), dirstart); 1301 } else 1302 Parse_Error(PARSE_FATAL, "Need an operator"); 1303 goto out; 1304 } 1305 1306 /* Insert a null terminator. */ 1307 savec = *cp; 1308 *cp = '\0'; 1309 1310 /* 1311 * Got the word. See if it's a special target and if so set 1312 * specType to match it. 1313 */ 1314 if (*line == '.' && isupper ((unsigned char)line[1])) { 1315 /* 1316 * See if the target is a special target that must have it 1317 * or its sources handled specially. 1318 */ 1319 int keywd = ParseFindKeyword(line); 1320 if (keywd != -1) { 1321 if (specType == ExPath && parseKeywords[keywd].spec != ExPath) { 1322 Parse_Error(PARSE_FATAL, "Mismatched special targets"); 1323 goto out; 1324 } 1325 1326 specType = parseKeywords[keywd].spec; 1327 tOp = parseKeywords[keywd].op; 1328 1329 /* 1330 * Certain special targets have special semantics: 1331 * .PATH Have to set the dirSearchPath 1332 * variable too 1333 * .MAIN Its sources are only used if 1334 * nothing has been specified to 1335 * create. 1336 * .DEFAULT Need to create a node to hang 1337 * commands on, but we don't want 1338 * it in the graph, nor do we want 1339 * it to be the Main Target, so we 1340 * create it, set OP_NOTMAIN and 1341 * add it to the list, setting 1342 * DEFAULT to the new node for 1343 * later use. We claim the node is 1344 * A transformation rule to make 1345 * life easier later, when we'll 1346 * use Make_HandleUse to actually 1347 * apply the .DEFAULT commands. 1348 * .PHONY The list of targets 1349 * .NOPATH Don't search for file in the path 1350 * .STALE 1351 * .BEGIN 1352 * .END 1353 * .ERROR 1354 * .DELETE_ON_ERROR 1355 * .INTERRUPT Are not to be considered the 1356 * main target. 1357 * .NOTPARALLEL Make only one target at a time. 1358 * .SINGLESHELL Create a shell for each command. 1359 * .ORDER Must set initial predecessor to NULL 1360 */ 1361 switch (specType) { 1362 case ExPath: 1363 if (paths == NULL) { 1364 paths = Lst_Init(FALSE); 1365 } 1366 (void)Lst_AtEnd(paths, dirSearchPath); 1367 break; 1368 case Main: 1369 if (!Lst_IsEmpty(create)) { 1370 specType = Not; 1371 } 1372 break; 1373 case Begin: 1374 case End: 1375 case Stale: 1376 case dotError: 1377 case Interrupt: 1378 gn = Targ_FindNode(line, TARG_CREATE); 1379 if (doing_depend) 1380 ParseMark(gn); 1381 gn->type |= OP_NOTMAIN|OP_SPECIAL; 1382 (void)Lst_AtEnd(targets, gn); 1383 break; 1384 case Default: 1385 gn = Targ_NewGN(".DEFAULT"); 1386 gn->type |= (OP_NOTMAIN|OP_TRANSFORM); 1387 (void)Lst_AtEnd(targets, gn); 1388 DEFAULT = gn; 1389 break; 1390 case DeleteOnError: 1391 deleteOnError = TRUE; 1392 break; 1393 case NotParallel: 1394 maxJobs = 1; 1395 break; 1396 case SingleShell: 1397 compatMake = TRUE; 1398 break; 1399 case Order: 1400 predecessor = NULL; 1401 break; 1402 default: 1403 break; 1404 } 1405 } else if (strncmp(line, ".PATH", 5) == 0) { 1406 /* 1407 * .PATH<suffix> has to be handled specially. 1408 * Call on the suffix module to give us a path to 1409 * modify. 1410 */ 1411 Lst path; 1412 1413 specType = ExPath; 1414 path = Suff_GetPath(&line[5]); 1415 if (path == NULL) { 1416 Parse_Error(PARSE_FATAL, 1417 "Suffix '%s' not defined (yet)", 1418 &line[5]); 1419 goto out; 1420 } else { 1421 if (paths == NULL) { 1422 paths = Lst_Init(FALSE); 1423 } 1424 (void)Lst_AtEnd(paths, path); 1425 } 1426 } 1427 } 1428 1429 /* 1430 * Have word in line. Get or create its node and stick it at 1431 * the end of the targets list 1432 */ 1433 if (specType == Not && *line != '\0') { 1434 if (Dir_HasWildcards(line)) { 1435 /* 1436 * Targets are to be sought only in the current directory, 1437 * so create an empty path for the thing. Note we need to 1438 * use Dir_Destroy in the destruction of the path as the 1439 * Dir module could have added a directory to the path... 1440 */ 1441 Lst emptyPath = Lst_Init(FALSE); 1442 1443 Dir_Expand(line, emptyPath, curTargs); 1444 1445 Lst_Destroy(emptyPath, Dir_Destroy); 1446 } else { 1447 /* 1448 * No wildcards, but we want to avoid code duplication, 1449 * so create a list with the word on it. 1450 */ 1451 (void)Lst_AtEnd(curTargs, line); 1452 } 1453 1454 /* Apply the targets. */ 1455 1456 while(!Lst_IsEmpty(curTargs)) { 1457 char *targName = (char *)Lst_DeQueue(curTargs); 1458 1459 if (!Suff_IsTransform (targName)) { 1460 gn = Targ_FindNode(targName, TARG_CREATE); 1461 } else { 1462 gn = Suff_AddTransform(targName); 1463 } 1464 if (doing_depend) 1465 ParseMark(gn); 1466 1467 (void)Lst_AtEnd(targets, gn); 1468 } 1469 } else if (specType == ExPath && *line != '.' && *line != '\0') { 1470 Parse_Error(PARSE_WARNING, "Extra target (%s) ignored", line); 1471 } 1472 1473 /* Don't need the inserted null terminator any more. */ 1474 *cp = savec; 1475 1476 /* 1477 * If it is a special type and not .PATH, it's the only target we 1478 * allow on this line... 1479 */ 1480 if (specType != Not && specType != ExPath) { 1481 Boolean warning = FALSE; 1482 1483 while (*cp && (ParseIsEscaped(lstart, cp) || 1484 (*cp != '!' && *cp != ':'))) { 1485 if (ParseIsEscaped(lstart, cp) || 1486 (*cp != ' ' && *cp != '\t')) { 1487 warning = TRUE; 1488 } 1489 cp++; 1490 } 1491 if (warning) { 1492 Parse_Error(PARSE_WARNING, "Extra target ignored"); 1493 } 1494 } else { 1495 while (*cp && isspace ((unsigned char)*cp)) { 1496 cp++; 1497 } 1498 } 1499 line = cp; 1500 } while (*line && (ParseIsEscaped(lstart, line) || 1501 (*line != '!' && *line != ':'))); 1502 1503 /* 1504 * Don't need the list of target names anymore... 1505 */ 1506 Lst_Destroy(curTargs, NULL); 1507 curTargs = NULL; 1508 1509 if (!Lst_IsEmpty(targets)) { 1510 switch(specType) { 1511 default: 1512 Parse_Error(PARSE_WARNING, "Special and mundane targets don't mix. Mundane ones ignored"); 1513 break; 1514 case Default: 1515 case Stale: 1516 case Begin: 1517 case End: 1518 case dotError: 1519 case Interrupt: 1520 /* 1521 * These four create nodes on which to hang commands, so 1522 * targets shouldn't be empty... 1523 */ 1524 case Not: 1525 /* 1526 * Nothing special here -- targets can be empty if it wants. 1527 */ 1528 break; 1529 } 1530 } 1531 1532 /* 1533 * Have now parsed all the target names. Must parse the operator next. The 1534 * result is left in op . 1535 */ 1536 if (*cp == '!') { 1537 op = OP_FORCE; 1538 } else if (*cp == ':') { 1539 if (cp[1] == ':') { 1540 op = OP_DOUBLEDEP; 1541 cp++; 1542 } else { 1543 op = OP_DEPENDS; 1544 } 1545 } else { 1546 Parse_Error(PARSE_FATAL, lstart[0] == '.' ? "Unknown directive" 1547 : "Missing dependency operator"); 1548 goto out; 1549 } 1550 1551 /* Advance beyond the operator */ 1552 cp++; 1553 1554 /* 1555 * Apply the operator to the target. This is how we remember which 1556 * operator a target was defined with. It fails if the operator 1557 * used isn't consistent across all references. 1558 */ 1559 Lst_ForEach(targets, ParseDoOp, &op); 1560 1561 /* 1562 * Onward to the sources. 1563 * 1564 * LINE will now point to the first source word, if any, or the 1565 * end of the string if not. 1566 */ 1567 while (*cp && isspace ((unsigned char)*cp)) { 1568 cp++; 1569 } 1570 line = cp; 1571 1572 /* 1573 * Several special targets take different actions if present with no 1574 * sources: 1575 * a .SUFFIXES line with no sources clears out all old suffixes 1576 * a .PRECIOUS line makes all targets precious 1577 * a .IGNORE line ignores errors for all targets 1578 * a .SILENT line creates silence when making all targets 1579 * a .PATH removes all directories from the search path(s). 1580 */ 1581 if (!*line) { 1582 switch (specType) { 1583 case Suffixes: 1584 Suff_ClearSuffixes(); 1585 break; 1586 case Precious: 1587 allPrecious = TRUE; 1588 break; 1589 case Ignore: 1590 ignoreErrors = TRUE; 1591 break; 1592 case Silent: 1593 beSilent = TRUE; 1594 break; 1595 case ExPath: 1596 Lst_ForEach(paths, ParseClearPath, NULL); 1597 Dir_SetPATH(); 1598 break; 1599 #ifdef POSIX 1600 case Posix: 1601 Var_Set("%POSIX", "1003.2", VAR_GLOBAL); 1602 break; 1603 #endif 1604 default: 1605 break; 1606 } 1607 } else if (specType == MFlags) { 1608 /* 1609 * Call on functions in main.c to deal with these arguments and 1610 * set the initial character to a null-character so the loop to 1611 * get sources won't get anything 1612 */ 1613 Main_ParseArgLine(line); 1614 *line = '\0'; 1615 } else if (specType == ExShell) { 1616 if (Job_ParseShell(line) != SUCCESS) { 1617 Parse_Error(PARSE_FATAL, "improper shell specification"); 1618 goto out; 1619 } 1620 *line = '\0'; 1621 } else if (specType == NotParallel || specType == SingleShell || 1622 specType == DeleteOnError) { 1623 *line = '\0'; 1624 } 1625 1626 /* 1627 * NOW GO FOR THE SOURCES 1628 */ 1629 if (specType == Suffixes || specType == ExPath || 1630 specType == Includes || specType == Libs || 1631 specType == Null || specType == ExObjdir) 1632 { 1633 while (*line) { 1634 /* 1635 * If the target was one that doesn't take files as its sources 1636 * but takes something like suffixes, we take each 1637 * space-separated word on the line as a something and deal 1638 * with it accordingly. 1639 * 1640 * If the target was .SUFFIXES, we take each source as a 1641 * suffix and add it to the list of suffixes maintained by the 1642 * Suff module. 1643 * 1644 * If the target was a .PATH, we add the source as a directory 1645 * to search on the search path. 1646 * 1647 * If it was .INCLUDES, the source is taken to be the suffix of 1648 * files which will be #included and whose search path should 1649 * be present in the .INCLUDES variable. 1650 * 1651 * If it was .LIBS, the source is taken to be the suffix of 1652 * files which are considered libraries and whose search path 1653 * should be present in the .LIBS variable. 1654 * 1655 * If it was .NULL, the source is the suffix to use when a file 1656 * has no valid suffix. 1657 * 1658 * If it was .OBJDIR, the source is a new definition for .OBJDIR, 1659 * and will cause make to do a new chdir to that path. 1660 */ 1661 while (*cp && !isspace ((unsigned char)*cp)) { 1662 cp++; 1663 } 1664 savec = *cp; 1665 *cp = '\0'; 1666 switch (specType) { 1667 case Suffixes: 1668 Suff_AddSuffix(line, &mainNode); 1669 break; 1670 case ExPath: 1671 Lst_ForEach(paths, ParseAddDir, line); 1672 break; 1673 case Includes: 1674 Suff_AddInclude(line); 1675 break; 1676 case Libs: 1677 Suff_AddLib(line); 1678 break; 1679 case Null: 1680 Suff_SetNull(line); 1681 break; 1682 case ExObjdir: 1683 Main_SetObjdir("%s", line); 1684 break; 1685 default: 1686 break; 1687 } 1688 *cp = savec; 1689 if (savec != '\0') { 1690 cp++; 1691 } 1692 while (*cp && isspace ((unsigned char)*cp)) { 1693 cp++; 1694 } 1695 line = cp; 1696 } 1697 if (paths) { 1698 Lst_Destroy(paths, NULL); 1699 paths = NULL; 1700 } 1701 if (specType == ExPath) 1702 Dir_SetPATH(); 1703 } else { 1704 assert(paths == NULL); 1705 while (*line) { 1706 /* 1707 * The targets take real sources, so we must beware of archive 1708 * specifications (i.e. things with left parentheses in them) 1709 * and handle them accordingly. 1710 */ 1711 for (; *cp && !isspace ((unsigned char)*cp); cp++) { 1712 if (*cp == LPAREN && cp > line && cp[-1] != '$') { 1713 /* 1714 * Only stop for a left parenthesis if it isn't at the 1715 * start of a word (that'll be for variable changes 1716 * later) and isn't preceded by a dollar sign (a dynamic 1717 * source). 1718 */ 1719 break; 1720 } 1721 } 1722 1723 if (*cp == LPAREN) { 1724 sources = Lst_Init(FALSE); 1725 if (Arch_ParseArchive(&line, sources, VAR_CMD) != SUCCESS) { 1726 Parse_Error(PARSE_FATAL, 1727 "Error in source archive spec \"%s\"", line); 1728 goto out; 1729 } 1730 1731 while (!Lst_IsEmpty (sources)) { 1732 gn = (GNode *)Lst_DeQueue(sources); 1733 ParseDoSrc(tOp, gn->name); 1734 } 1735 Lst_Destroy(sources, NULL); 1736 cp = line; 1737 } else { 1738 if (*cp) { 1739 *cp = '\0'; 1740 cp += 1; 1741 } 1742 1743 ParseDoSrc(tOp, line); 1744 } 1745 while (*cp && isspace ((unsigned char)*cp)) { 1746 cp++; 1747 } 1748 line = cp; 1749 } 1750 } 1751 1752 if (mainNode == NULL) { 1753 /* 1754 * If we have yet to decide on a main target to make, in the 1755 * absence of any user input, we want the first target on 1756 * the first dependency line that is actually a real target 1757 * (i.e. isn't a .USE or .EXEC rule) to be made. 1758 */ 1759 Lst_ForEach(targets, ParseFindMain, NULL); 1760 } 1761 1762 out: 1763 if (paths) 1764 Lst_Destroy(paths, NULL); 1765 if (curTargs) 1766 Lst_Destroy(curTargs, NULL); 1767 } 1768 1769 /*- 1770 *--------------------------------------------------------------------- 1771 * Parse_IsVar -- 1772 * Return TRUE if the passed line is a variable assignment. A variable 1773 * assignment consists of a single word followed by optional whitespace 1774 * followed by either a += or an = operator. 1775 * This function is used both by the Parse_File function and main when 1776 * parsing the command-line arguments. 1777 * 1778 * Input: 1779 * line the line to check 1780 * 1781 * Results: 1782 * TRUE if it is. FALSE if it ain't 1783 * 1784 * Side Effects: 1785 * none 1786 *--------------------------------------------------------------------- 1787 */ 1788 Boolean 1789 Parse_IsVar(char *line) 1790 { 1791 Boolean wasSpace = FALSE; /* set TRUE if found a space */ 1792 char ch; 1793 int level = 0; 1794 #define ISEQOPERATOR(c) \ 1795 (((c) == '+') || ((c) == ':') || ((c) == '?') || ((c) == '!')) 1796 1797 /* 1798 * Skip to variable name 1799 */ 1800 while (*line == ' ' || *line == '\t') 1801 line++; 1802 1803 /* Scan for one of the assignment operators outside a variable expansion */ 1804 while ((ch = *line++) != 0) { 1805 if (ch == '(' || ch == '{') { 1806 level++; 1807 continue; 1808 } 1809 if (ch == ')' || ch == '}') { 1810 level--; 1811 continue; 1812 } 1813 if (level != 0) 1814 continue; 1815 while (ch == ' ' || ch == '\t') { 1816 ch = *line++; 1817 wasSpace = TRUE; 1818 } 1819 #ifdef SUNSHCMD 1820 if (ch == ':' && strncmp(line, "sh", 2) == 0) { 1821 line += 2; 1822 continue; 1823 } 1824 #endif 1825 if (ch == '=') 1826 return TRUE; 1827 if (*line == '=' && ISEQOPERATOR(ch)) 1828 return TRUE; 1829 if (wasSpace) 1830 return FALSE; 1831 } 1832 1833 return FALSE; 1834 } 1835 1836 /*- 1837 *--------------------------------------------------------------------- 1838 * Parse_DoVar -- 1839 * Take the variable assignment in the passed line and do it in the 1840 * global context. 1841 * 1842 * Note: There is a lexical ambiguity with assignment modifier characters 1843 * in variable names. This routine interprets the character before the = 1844 * as a modifier. Therefore, an assignment like 1845 * C++=/usr/bin/CC 1846 * is interpreted as "C+ +=" instead of "C++ =". 1847 * 1848 * Input: 1849 * line a line guaranteed to be a variable assignment. 1850 * This reduces error checks 1851 * ctxt Context in which to do the assignment 1852 * 1853 * Results: 1854 * none 1855 * 1856 * Side Effects: 1857 * the variable structure of the given variable name is altered in the 1858 * global context. 1859 *--------------------------------------------------------------------- 1860 */ 1861 void 1862 Parse_DoVar(char *line, GNode *ctxt) 1863 { 1864 char *cp; /* pointer into line */ 1865 enum { 1866 VAR_SUBST, VAR_APPEND, VAR_SHELL, VAR_NORMAL 1867 } type; /* Type of assignment */ 1868 char *opc; /* ptr to operator character to 1869 * null-terminate the variable name */ 1870 Boolean freeCp = FALSE; /* TRUE if cp needs to be freed, 1871 * i.e. if any variable expansion was 1872 * performed */ 1873 int depth; 1874 1875 /* 1876 * Skip to variable name 1877 */ 1878 while (*line == ' ' || *line == '\t') 1879 line++; 1880 1881 /* 1882 * Skip to operator character, nulling out whitespace as we go 1883 * XXX Rather than counting () and {} we should look for $ and 1884 * then expand the variable. 1885 */ 1886 for (depth = 0, cp = line + 1; depth > 0 || *cp != '='; cp++) { 1887 if (*cp == '(' || *cp == '{') { 1888 depth++; 1889 continue; 1890 } 1891 if (*cp == ')' || *cp == '}') { 1892 depth--; 1893 continue; 1894 } 1895 if (depth == 0 && isspace ((unsigned char)*cp)) { 1896 *cp = '\0'; 1897 } 1898 } 1899 opc = cp-1; /* operator is the previous character */ 1900 *cp++ = '\0'; /* nuke the = */ 1901 1902 /* 1903 * Check operator type 1904 */ 1905 switch (*opc) { 1906 case '+': 1907 type = VAR_APPEND; 1908 *opc = '\0'; 1909 break; 1910 1911 case '?': 1912 /* 1913 * If the variable already has a value, we don't do anything. 1914 */ 1915 *opc = '\0'; 1916 if (Var_Exists(line, ctxt)) { 1917 return; 1918 } else { 1919 type = VAR_NORMAL; 1920 } 1921 break; 1922 1923 case ':': 1924 type = VAR_SUBST; 1925 *opc = '\0'; 1926 break; 1927 1928 case '!': 1929 type = VAR_SHELL; 1930 *opc = '\0'; 1931 break; 1932 1933 default: 1934 #ifdef SUNSHCMD 1935 while (opc > line && *opc != ':') 1936 opc--; 1937 1938 if (strncmp(opc, ":sh", 3) == 0) { 1939 type = VAR_SHELL; 1940 *opc = '\0'; 1941 break; 1942 } 1943 #endif 1944 type = VAR_NORMAL; 1945 break; 1946 } 1947 1948 while (isspace((unsigned char)*cp)) 1949 cp++; 1950 1951 if (DEBUG(LINT)) { 1952 if (type != VAR_SUBST && strchr(cp, '$') != NULL) { 1953 /* sanity check now */ 1954 char *cp2; 1955 1956 cp2 = Var_Subst(cp, ctxt, VARE_WANTRES|VARE_ASSIGN); 1957 free(cp2); 1958 } 1959 } 1960 1961 if (type == VAR_APPEND) { 1962 Var_Append(line, cp, ctxt); 1963 } else if (type == VAR_SUBST) { 1964 /* 1965 * Allow variables in the old value to be undefined, but leave their 1966 * invocation alone -- this is done by forcing oldVars to be false. 1967 * XXX: This can cause recursive variables, but that's not hard to do, 1968 * and this allows someone to do something like 1969 * 1970 * CFLAGS = $(.INCLUDES) 1971 * CFLAGS := -I.. $(CFLAGS) 1972 * 1973 * And not get an error. 1974 */ 1975 Boolean oldOldVars = oldVars; 1976 1977 oldVars = FALSE; 1978 1979 /* 1980 * make sure that we set the variable the first time to nothing 1981 * so that it gets substituted! 1982 */ 1983 if (!Var_Exists(line, ctxt)) 1984 Var_Set(line, "", ctxt); 1985 1986 cp = Var_Subst(cp, ctxt, VARE_WANTRES|VARE_ASSIGN); 1987 oldVars = oldOldVars; 1988 freeCp = TRUE; 1989 1990 Var_Set(line, cp, ctxt); 1991 } else if (type == VAR_SHELL) { 1992 char *res; 1993 const char *error; 1994 1995 if (strchr(cp, '$') != NULL) { 1996 /* 1997 * There's a dollar sign in the command, so perform variable 1998 * expansion on the whole thing. The resulting string will need 1999 * freeing when we're done. 2000 */ 2001 cp = Var_Subst(cp, VAR_CMD, VARE_UNDEFERR|VARE_WANTRES); 2002 freeCp = TRUE; 2003 } 2004 2005 res = Cmd_Exec(cp, &error); 2006 Var_Set(line, res, ctxt); 2007 free(res); 2008 2009 if (error) 2010 Parse_Error(PARSE_WARNING, error, cp); 2011 } else { 2012 /* 2013 * Normal assignment -- just do it. 2014 */ 2015 Var_Set(line, cp, ctxt); 2016 } 2017 if (strcmp(line, MAKEOVERRIDES) == 0) 2018 Main_ExportMAKEFLAGS(FALSE); /* re-export MAKEFLAGS */ 2019 else if (strcmp(line, ".CURDIR") == 0) { 2020 /* 2021 * Somone is being (too?) clever... 2022 * Let's pretend they know what they are doing and 2023 * re-initialize the 'cur' Path. 2024 */ 2025 Dir_InitCur(cp); 2026 Dir_SetPATH(); 2027 } else if (strcmp(line, MAKE_JOB_PREFIX) == 0) { 2028 Job_SetPrefix(); 2029 } else if (strcmp(line, MAKE_EXPORTED) == 0) { 2030 Var_Export(cp, 0); 2031 } 2032 if (freeCp) 2033 free(cp); 2034 } 2035 2036 2037 /* 2038 * ParseMaybeSubMake -- 2039 * Scan the command string to see if it a possible submake node 2040 * Input: 2041 * cmd the command to scan 2042 * Results: 2043 * TRUE if the command is possibly a submake, FALSE if not. 2044 */ 2045 static Boolean 2046 ParseMaybeSubMake(const char *cmd) 2047 { 2048 size_t i; 2049 static struct { 2050 const char *name; 2051 size_t len; 2052 } vals[] = { 2053 #define MKV(A) { A, sizeof(A) - 1 } 2054 MKV("${MAKE}"), 2055 MKV("${.MAKE}"), 2056 MKV("$(MAKE)"), 2057 MKV("$(.MAKE)"), 2058 MKV("make"), 2059 }; 2060 for (i = 0; i < sizeof(vals)/sizeof(vals[0]); i++) { 2061 char *ptr; 2062 if ((ptr = strstr(cmd, vals[i].name)) == NULL) 2063 continue; 2064 if ((ptr == cmd || !isalnum((unsigned char)ptr[-1])) 2065 && !isalnum((unsigned char)ptr[vals[i].len])) 2066 return TRUE; 2067 } 2068 return FALSE; 2069 } 2070 2071 /*- 2072 * ParseAddCmd -- 2073 * Lst_ForEach function to add a command line to all targets 2074 * 2075 * Input: 2076 * gnp the node to which the command is to be added 2077 * cmd the command to add 2078 * 2079 * Results: 2080 * Always 0 2081 * 2082 * Side Effects: 2083 * A new element is added to the commands list of the node, 2084 * and the node can be marked as a submake node if the command is 2085 * determined to be that. 2086 */ 2087 static int 2088 ParseAddCmd(void *gnp, void *cmd) 2089 { 2090 GNode *gn = (GNode *)gnp; 2091 2092 /* Add to last (ie current) cohort for :: targets */ 2093 if ((gn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (gn->cohorts)) 2094 gn = (GNode *)Lst_Datum(Lst_Last(gn->cohorts)); 2095 2096 /* if target already supplied, ignore commands */ 2097 if (!(gn->type & OP_HAS_COMMANDS)) { 2098 (void)Lst_AtEnd(gn->commands, cmd); 2099 if (ParseMaybeSubMake(cmd)) 2100 gn->type |= OP_SUBMAKE; 2101 ParseMark(gn); 2102 } else { 2103 #ifdef notyet 2104 /* XXX: We cannot do this until we fix the tree */ 2105 (void)Lst_AtEnd(gn->commands, cmd); 2106 Parse_Error(PARSE_WARNING, 2107 "overriding commands for target \"%s\"; " 2108 "previous commands defined at %s: %d ignored", 2109 gn->name, gn->fname, gn->lineno); 2110 #else 2111 Parse_Error(PARSE_WARNING, 2112 "duplicate script for target \"%s\" ignored", 2113 gn->name); 2114 ParseErrorInternal(gn->fname, gn->lineno, PARSE_WARNING, 2115 "using previous script for \"%s\" defined here", 2116 gn->name); 2117 #endif 2118 } 2119 return 0; 2120 } 2121 2122 /*- 2123 *----------------------------------------------------------------------- 2124 * ParseHasCommands -- 2125 * Callback procedure for Parse_File when destroying the list of 2126 * targets on the last dependency line. Marks a target as already 2127 * having commands if it does, to keep from having shell commands 2128 * on multiple dependency lines. 2129 * 2130 * Input: 2131 * gnp Node to examine 2132 * 2133 * Results: 2134 * None 2135 * 2136 * Side Effects: 2137 * OP_HAS_COMMANDS may be set for the target. 2138 * 2139 *----------------------------------------------------------------------- 2140 */ 2141 static void 2142 ParseHasCommands(void *gnp) 2143 { 2144 GNode *gn = (GNode *)gnp; 2145 if (!Lst_IsEmpty(gn->commands)) { 2146 gn->type |= OP_HAS_COMMANDS; 2147 } 2148 } 2149 2150 /*- 2151 *----------------------------------------------------------------------- 2152 * Parse_AddIncludeDir -- 2153 * Add a directory to the path searched for included makefiles 2154 * bracketed by double-quotes. Used by functions in main.c 2155 * 2156 * Input: 2157 * dir The name of the directory to add 2158 * 2159 * Results: 2160 * None. 2161 * 2162 * Side Effects: 2163 * The directory is appended to the list. 2164 * 2165 *----------------------------------------------------------------------- 2166 */ 2167 void 2168 Parse_AddIncludeDir(char *dir) 2169 { 2170 (void)Dir_AddDir(parseIncPath, dir); 2171 } 2172 2173 /*- 2174 *--------------------------------------------------------------------- 2175 * ParseDoInclude -- 2176 * Push to another file. 2177 * 2178 * The input is the line minus the `.'. A file spec is a string 2179 * enclosed in <> or "". The former is looked for only in sysIncPath. 2180 * The latter in . and the directories specified by -I command line 2181 * options 2182 * 2183 * Results: 2184 * None 2185 * 2186 * Side Effects: 2187 * A structure is added to the includes Lst and readProc, lineno, 2188 * fname and curFILE are altered for the new file 2189 *--------------------------------------------------------------------- 2190 */ 2191 2192 static void 2193 Parse_include_file(char *file, Boolean isSystem, Boolean depinc, int silent) 2194 { 2195 struct loadedfile *lf; 2196 char *fullname; /* full pathname of file */ 2197 char *newName; 2198 char *prefEnd, *incdir; 2199 int fd; 2200 int i; 2201 2202 /* 2203 * Now we know the file's name and its search path, we attempt to 2204 * find the durn thing. A return of NULL indicates the file don't 2205 * exist. 2206 */ 2207 fullname = file[0] == '/' ? bmake_strdup(file) : NULL; 2208 2209 if (fullname == NULL && !isSystem) { 2210 /* 2211 * Include files contained in double-quotes are first searched for 2212 * relative to the including file's location. We don't want to 2213 * cd there, of course, so we just tack on the old file's 2214 * leading path components and call Dir_FindFile to see if 2215 * we can locate the beast. 2216 */ 2217 2218 incdir = bmake_strdup(curFile->fname); 2219 prefEnd = strrchr(incdir, '/'); 2220 if (prefEnd != NULL) { 2221 *prefEnd = '\0'; 2222 /* Now do lexical processing of leading "../" on the filename */ 2223 for (i = 0; strncmp(file + i, "../", 3) == 0; i += 3) { 2224 prefEnd = strrchr(incdir + 1, '/'); 2225 if (prefEnd == NULL || strcmp(prefEnd, "/..") == 0) 2226 break; 2227 *prefEnd = '\0'; 2228 } 2229 newName = str_concat(incdir, file + i, STR_ADDSLASH); 2230 fullname = Dir_FindFile(newName, parseIncPath); 2231 if (fullname == NULL) 2232 fullname = Dir_FindFile(newName, dirSearchPath); 2233 free(newName); 2234 } 2235 free(incdir); 2236 2237 if (fullname == NULL) { 2238 /* 2239 * Makefile wasn't found in same directory as included makefile. 2240 * Search for it first on the -I search path, 2241 * then on the .PATH search path, if not found in a -I directory. 2242 * If we have a suffix specific path we should use that. 2243 */ 2244 char *suff; 2245 Lst suffPath = NULL; 2246 2247 if ((suff = strrchr(file, '.'))) { 2248 suffPath = Suff_GetPath(suff); 2249 if (suffPath != NULL) { 2250 fullname = Dir_FindFile(file, suffPath); 2251 } 2252 } 2253 if (fullname == NULL) { 2254 fullname = Dir_FindFile(file, parseIncPath); 2255 if (fullname == NULL) { 2256 fullname = Dir_FindFile(file, dirSearchPath); 2257 } 2258 } 2259 } 2260 } 2261 2262 /* Looking for a system file or file still not found */ 2263 if (fullname == NULL) { 2264 /* 2265 * Look for it on the system path 2266 */ 2267 fullname = Dir_FindFile(file, 2268 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath); 2269 } 2270 2271 if (fullname == NULL) { 2272 if (!silent) 2273 Parse_Error(PARSE_FATAL, "Could not find %s", file); 2274 return; 2275 } 2276 2277 /* Actually open the file... */ 2278 fd = open(fullname, O_RDONLY); 2279 if (fd == -1) { 2280 if (!silent) 2281 Parse_Error(PARSE_FATAL, "Cannot open %s", fullname); 2282 free(fullname); 2283 return; 2284 } 2285 2286 /* load it */ 2287 lf = loadfile(fullname, fd); 2288 2289 ParseSetIncludedFile(); 2290 /* Start reading from this file next */ 2291 Parse_SetInput(fullname, 0, -1, loadedfile_nextbuf, lf); 2292 curFile->lf = lf; 2293 if (depinc) 2294 doing_depend = depinc; /* only turn it on */ 2295 } 2296 2297 static void 2298 ParseDoInclude(char *line) 2299 { 2300 char endc; /* the character which ends the file spec */ 2301 char *cp; /* current position in file spec */ 2302 int silent = *line != 'i'; 2303 char *file = &line[7 + silent]; 2304 2305 /* Skip to delimiter character so we know where to look */ 2306 while (*file == ' ' || *file == '\t') 2307 file++; 2308 2309 if (*file != '"' && *file != '<') { 2310 Parse_Error(PARSE_FATAL, 2311 ".include filename must be delimited by '\"' or '<'"); 2312 return; 2313 } 2314 2315 /* 2316 * Set the search path on which to find the include file based on the 2317 * characters which bracket its name. Angle-brackets imply it's 2318 * a system Makefile while double-quotes imply it's a user makefile 2319 */ 2320 if (*file == '<') { 2321 endc = '>'; 2322 } else { 2323 endc = '"'; 2324 } 2325 2326 /* Skip to matching delimiter */ 2327 for (cp = ++file; *cp && *cp != endc; cp++) 2328 continue; 2329 2330 if (*cp != endc) { 2331 Parse_Error(PARSE_FATAL, 2332 "Unclosed %cinclude filename. '%c' expected", 2333 '.', endc); 2334 return; 2335 } 2336 *cp = '\0'; 2337 2338 /* 2339 * Substitute for any variables in the file name before trying to 2340 * find the thing. 2341 */ 2342 file = Var_Subst(file, VAR_CMD, VARE_WANTRES); 2343 2344 Parse_include_file(file, endc == '>', *line == 'd', silent); 2345 free(file); 2346 } 2347 2348 2349 /*- 2350 *--------------------------------------------------------------------- 2351 * ParseSetIncludedFile -- 2352 * Set the .INCLUDEDFROMFILE variable to the contents of .PARSEFILE 2353 * and the .INCLUDEDFROMDIR variable to the contents of .PARSEDIR 2354 * 2355 * Results: 2356 * None 2357 * 2358 * Side Effects: 2359 * The .INCLUDEDFROMFILE variable is overwritten by the contents 2360 * of .PARSEFILE and the .INCLUDEDFROMDIR variable is overwriten 2361 * by the contents of .PARSEDIR 2362 *--------------------------------------------------------------------- 2363 */ 2364 static void 2365 ParseSetIncludedFile(void) 2366 { 2367 char *pf_freeIt; 2368 char *pd_freeIt; 2369 2370 const char *pf = Var_Value(".PARSEFILE", VAR_GLOBAL, &pf_freeIt); 2371 Var_Set(".INCLUDEDFROMFILE", pf, VAR_GLOBAL); 2372 const char *pd = Var_Value(".PARSEDIR", VAR_GLOBAL, &pd_freeIt); 2373 Var_Set(".INCLUDEDFROMDIR", pd, VAR_GLOBAL); 2374 2375 if (DEBUG(PARSE)) 2376 fprintf(debug_file, "%s: ${.INCLUDEDFROMDIR} = `%s' " 2377 "${.INCLUDEDFROMFILE} = `%s'\n", __func__, pd, pf); 2378 2379 free(pf_freeIt); 2380 free(pd_freeIt); 2381 } 2382 /*- 2383 *--------------------------------------------------------------------- 2384 * ParseSetParseFile -- 2385 * Set the .PARSEDIR and .PARSEFILE variables to the dirname and 2386 * basename of the given filename 2387 * 2388 * Results: 2389 * None 2390 * 2391 * Side Effects: 2392 * The .PARSEDIR and .PARSEFILE variables are overwritten by the 2393 * dirname and basename of the given filename. 2394 *--------------------------------------------------------------------- 2395 */ 2396 static void 2397 ParseSetParseFile(const char *filename) 2398 { 2399 char *slash, *dirname; 2400 const char *pd, *pf; 2401 int len; 2402 2403 slash = strrchr(filename, '/'); 2404 if (slash == NULL) { 2405 Var_Set(".PARSEDIR", pd = curdir, VAR_GLOBAL); 2406 Var_Set(".PARSEFILE", pf = filename, VAR_GLOBAL); 2407 dirname= NULL; 2408 } else { 2409 len = slash - filename; 2410 dirname = bmake_malloc(len + 1); 2411 memcpy(dirname, filename, len); 2412 dirname[len] = '\0'; 2413 Var_Set(".PARSEDIR", pd = dirname, VAR_GLOBAL); 2414 Var_Set(".PARSEFILE", pf = slash + 1, VAR_GLOBAL); 2415 } 2416 if (DEBUG(PARSE)) 2417 fprintf(debug_file, "%s: ${.PARSEDIR} = `%s' ${.PARSEFILE} = `%s'\n", 2418 __func__, pd, pf); 2419 free(dirname); 2420 } 2421 2422 /* 2423 * Track the makefiles we read - so makefiles can 2424 * set dependencies on them. 2425 * Avoid adding anything more than once. 2426 */ 2427 2428 static void 2429 ParseTrackInput(const char *name) 2430 { 2431 char *fp = NULL; 2432 2433 const char *old = Var_Value(MAKE_MAKEFILES, VAR_GLOBAL, &fp); 2434 if (old) { 2435 size_t name_len = strlen(name); 2436 const char *ep = old + strlen(old) - name_len; 2437 /* does it contain name? */ 2438 for (; old != NULL; old = strchr(old, ' ')) { 2439 if (*old == ' ') 2440 old++; 2441 if (old >= ep) 2442 break; /* cannot contain name */ 2443 if (memcmp(old, name, name_len) == 0 2444 && (old[name_len] == 0 || old[name_len] == ' ')) 2445 goto cleanup; 2446 } 2447 } 2448 Var_Append (MAKE_MAKEFILES, name, VAR_GLOBAL); 2449 cleanup: 2450 free(fp); 2451 } 2452 2453 2454 /*- 2455 *--------------------------------------------------------------------- 2456 * Parse_setInput -- 2457 * Start Parsing from the given source 2458 * 2459 * Results: 2460 * None 2461 * 2462 * Side Effects: 2463 * A structure is added to the includes Lst and readProc, lineno, 2464 * fname and curFile are altered for the new file 2465 *--------------------------------------------------------------------- 2466 */ 2467 void 2468 Parse_SetInput(const char *name, int line, int fd, 2469 char *(*nextbuf)(void *, size_t *), void *arg) 2470 { 2471 char *buf; 2472 size_t len; 2473 2474 if (name == NULL) 2475 name = curFile->fname; 2476 else 2477 ParseTrackInput(name); 2478 2479 if (DEBUG(PARSE)) 2480 fprintf(debug_file, "%s: file %s, line %d, fd %d, nextbuf %p, arg %p\n", 2481 __func__, name, line, fd, nextbuf, arg); 2482 2483 if (fd == -1 && nextbuf == NULL) 2484 /* sanity */ 2485 return; 2486 2487 if (curFile != NULL) 2488 /* Save exiting file info */ 2489 Lst_AtFront(includes, curFile); 2490 2491 /* Allocate and fill in new structure */ 2492 curFile = bmake_malloc(sizeof *curFile); 2493 2494 /* 2495 * Once the previous state has been saved, we can get down to reading 2496 * the new file. We set up the name of the file to be the absolute 2497 * name of the include file so error messages refer to the right 2498 * place. 2499 */ 2500 curFile->fname = bmake_strdup(name); 2501 curFile->lineno = line; 2502 curFile->first_lineno = line; 2503 curFile->nextbuf = nextbuf; 2504 curFile->nextbuf_arg = arg; 2505 curFile->lf = NULL; 2506 curFile->depending = doing_depend; /* restore this on EOF */ 2507 2508 assert(nextbuf != NULL); 2509 2510 /* Get first block of input data */ 2511 buf = curFile->nextbuf(curFile->nextbuf_arg, &len); 2512 if (buf == NULL) { 2513 /* Was all a waste of time ... */ 2514 if (curFile->fname) 2515 free(curFile->fname); 2516 free(curFile); 2517 return; 2518 } 2519 curFile->P_str = buf; 2520 curFile->P_ptr = buf; 2521 curFile->P_end = buf+len; 2522 2523 curFile->cond_depth = Cond_save_depth(); 2524 ParseSetParseFile(name); 2525 } 2526 2527 /*- 2528 *----------------------------------------------------------------------- 2529 * IsInclude -- 2530 * Check if the line is an include directive 2531 * 2532 * Results: 2533 * TRUE if it is. 2534 * 2535 * Side Effects: 2536 * None 2537 * 2538 *----------------------------------------------------------------------- 2539 */ 2540 static Boolean 2541 IsInclude(const char *line, Boolean sysv) 2542 { 2543 static const char inc[] = "include"; 2544 static const size_t inclen = sizeof(inc) - 1; 2545 2546 // 'd' is not valid for sysv 2547 int o = strchr(&("ds-"[sysv]), *line) != NULL; 2548 2549 if (strncmp(line + o, inc, inclen) != 0) 2550 return FALSE; 2551 2552 // Space is not mandatory for BSD .include 2553 return !sysv || isspace((unsigned char)line[inclen + o]); 2554 } 2555 2556 2557 #ifdef SYSVINCLUDE 2558 /*- 2559 *----------------------------------------------------------------------- 2560 * IsSysVInclude -- 2561 * Check if the line is a SYSV include directive 2562 * 2563 * Results: 2564 * TRUE if it is. 2565 * 2566 * Side Effects: 2567 * None 2568 * 2569 *----------------------------------------------------------------------- 2570 */ 2571 static Boolean 2572 IsSysVInclude(const char *line) 2573 { 2574 const char *p; 2575 2576 if (!IsInclude(line, TRUE)) 2577 return FALSE; 2578 2579 /* Avoid interpeting a dependency line as an include */ 2580 for (p = line; (p = strchr(p, ':')) != NULL;) { 2581 if (*++p == '\0') { 2582 /* end of line -> dependency */ 2583 return FALSE; 2584 } 2585 if (*p == ':' || isspace((unsigned char)*p)) { 2586 /* :: operator or ': ' -> dependency */ 2587 return FALSE; 2588 } 2589 } 2590 return TRUE; 2591 } 2592 2593 /*- 2594 *--------------------------------------------------------------------- 2595 * ParseTraditionalInclude -- 2596 * Push to another file. 2597 * 2598 * The input is the current line. The file name(s) are 2599 * following the "include". 2600 * 2601 * Results: 2602 * None 2603 * 2604 * Side Effects: 2605 * A structure is added to the includes Lst and readProc, lineno, 2606 * fname and curFILE are altered for the new file 2607 *--------------------------------------------------------------------- 2608 */ 2609 static void 2610 ParseTraditionalInclude(char *line) 2611 { 2612 char *cp; /* current position in file spec */ 2613 int done = 0; 2614 int silent = line[0] != 'i'; 2615 char *file = &line[silent + 7]; 2616 char *all_files; 2617 2618 if (DEBUG(PARSE)) { 2619 fprintf(debug_file, "%s: %s\n", __func__, file); 2620 } 2621 2622 /* 2623 * Skip over whitespace 2624 */ 2625 while (isspace((unsigned char)*file)) 2626 file++; 2627 2628 /* 2629 * Substitute for any variables in the file name before trying to 2630 * find the thing. 2631 */ 2632 all_files = Var_Subst(file, VAR_CMD, VARE_WANTRES); 2633 2634 if (*file == '\0') { 2635 Parse_Error(PARSE_FATAL, 2636 "Filename missing from \"include\""); 2637 goto out; 2638 } 2639 2640 for (file = all_files; !done; file = cp + 1) { 2641 /* Skip to end of line or next whitespace */ 2642 for (cp = file; *cp && !isspace((unsigned char) *cp); cp++) 2643 continue; 2644 2645 if (*cp) 2646 *cp = '\0'; 2647 else 2648 done = 1; 2649 2650 Parse_include_file(file, FALSE, FALSE, silent); 2651 } 2652 out: 2653 free(all_files); 2654 } 2655 #endif 2656 2657 #ifdef GMAKEEXPORT 2658 /*- 2659 *--------------------------------------------------------------------- 2660 * ParseGmakeExport -- 2661 * Parse export <variable>=<value> 2662 * 2663 * And set the environment with it. 2664 * 2665 * Results: 2666 * None 2667 * 2668 * Side Effects: 2669 * None 2670 *--------------------------------------------------------------------- 2671 */ 2672 static void 2673 ParseGmakeExport(char *line) 2674 { 2675 char *variable = &line[6]; 2676 char *value; 2677 2678 if (DEBUG(PARSE)) { 2679 fprintf(debug_file, "%s: %s\n", __func__, variable); 2680 } 2681 2682 /* 2683 * Skip over whitespace 2684 */ 2685 while (isspace((unsigned char)*variable)) 2686 variable++; 2687 2688 for (value = variable; *value && *value != '='; value++) 2689 continue; 2690 2691 if (*value != '=') { 2692 Parse_Error(PARSE_FATAL, 2693 "Variable/Value missing from \"export\""); 2694 return; 2695 } 2696 *value++ = '\0'; /* terminate variable */ 2697 2698 /* 2699 * Expand the value before putting it in the environment. 2700 */ 2701 value = Var_Subst(value, VAR_CMD, VARE_WANTRES); 2702 setenv(variable, value, 1); 2703 free(value); 2704 } 2705 #endif 2706 2707 /*- 2708 *--------------------------------------------------------------------- 2709 * ParseEOF -- 2710 * Called when EOF is reached in the current file. If we were reading 2711 * an include file, the includes stack is popped and things set up 2712 * to go back to reading the previous file at the previous location. 2713 * 2714 * Results: 2715 * CONTINUE if there's more to do. DONE if not. 2716 * 2717 * Side Effects: 2718 * The old curFILE, is closed. The includes list is shortened. 2719 * lineno, curFILE, and fname are changed if CONTINUE is returned. 2720 *--------------------------------------------------------------------- 2721 */ 2722 static int 2723 ParseEOF(void) 2724 { 2725 char *ptr; 2726 size_t len; 2727 2728 assert(curFile->nextbuf != NULL); 2729 2730 doing_depend = curFile->depending; /* restore this */ 2731 /* get next input buffer, if any */ 2732 ptr = curFile->nextbuf(curFile->nextbuf_arg, &len); 2733 curFile->P_ptr = ptr; 2734 curFile->P_str = ptr; 2735 curFile->P_end = ptr + len; 2736 curFile->lineno = curFile->first_lineno; 2737 if (ptr != NULL) { 2738 /* Iterate again */ 2739 return CONTINUE; 2740 } 2741 2742 /* Ensure the makefile (or loop) didn't have mismatched conditionals */ 2743 Cond_restore_depth(curFile->cond_depth); 2744 2745 if (curFile->lf != NULL) { 2746 loadedfile_destroy(curFile->lf); 2747 curFile->lf = NULL; 2748 } 2749 2750 /* Dispose of curFile info */ 2751 /* Leak curFile->fname because all the gnodes have pointers to it */ 2752 free(curFile->P_str); 2753 free(curFile); 2754 2755 curFile = Lst_DeQueue(includes); 2756 2757 if (curFile == NULL) { 2758 /* We've run out of input */ 2759 Var_Delete(".PARSEDIR", VAR_GLOBAL); 2760 Var_Delete(".PARSEFILE", VAR_GLOBAL); 2761 Var_Delete(".INCLUDEDFROMDIR", VAR_GLOBAL); 2762 Var_Delete(".INCLUDEDFROMFILE", VAR_GLOBAL); 2763 return DONE; 2764 } 2765 2766 if (DEBUG(PARSE)) 2767 fprintf(debug_file, "ParseEOF: returning to file %s, line %d\n", 2768 curFile->fname, curFile->lineno); 2769 2770 /* Restore the PARSEDIR/PARSEFILE variables */ 2771 ParseSetParseFile(curFile->fname); 2772 return CONTINUE; 2773 } 2774 2775 #define PARSE_RAW 1 2776 #define PARSE_SKIP 2 2777 2778 static char * 2779 ParseGetLine(int flags, int *length) 2780 { 2781 IFile *cf = curFile; 2782 char *ptr; 2783 char ch; 2784 char *line; 2785 char *line_end; 2786 char *escaped; 2787 char *comment; 2788 char *tp; 2789 2790 /* Loop through blank lines and comment lines */ 2791 for (;;) { 2792 cf->lineno++; 2793 line = cf->P_ptr; 2794 ptr = line; 2795 line_end = line; 2796 escaped = NULL; 2797 comment = NULL; 2798 for (;;) { 2799 if (cf->P_end != NULL && ptr == cf->P_end) { 2800 /* end of buffer */ 2801 ch = 0; 2802 break; 2803 } 2804 ch = *ptr; 2805 if (ch == 0 || (ch == '\\' && ptr[1] == 0)) { 2806 if (cf->P_end == NULL) 2807 /* End of string (aka for loop) data */ 2808 break; 2809 /* see if there is more we can parse */ 2810 while (ptr++ < cf->P_end) { 2811 if ((ch = *ptr) == '\n') { 2812 if (ptr > line && ptr[-1] == '\\') 2813 continue; 2814 Parse_Error(PARSE_WARNING, 2815 "Zero byte read from file, skipping rest of line."); 2816 break; 2817 } 2818 } 2819 if (cf->nextbuf != NULL) { 2820 /* 2821 * End of this buffer; return EOF and outer logic 2822 * will get the next one. (eww) 2823 */ 2824 break; 2825 } 2826 Parse_Error(PARSE_FATAL, "Zero byte read from file"); 2827 return NULL; 2828 } 2829 2830 if (ch == '\\') { 2831 /* Don't treat next character as special, remember first one */ 2832 if (escaped == NULL) 2833 escaped = ptr; 2834 if (ptr[1] == '\n') 2835 cf->lineno++; 2836 ptr += 2; 2837 line_end = ptr; 2838 continue; 2839 } 2840 if (ch == '#' && comment == NULL) { 2841 /* Remember first '#' for comment stripping */ 2842 /* Unless previous char was '[', as in modifier :[#] */ 2843 if (!(ptr > line && ptr[-1] == '[')) 2844 comment = line_end; 2845 } 2846 ptr++; 2847 if (ch == '\n') 2848 break; 2849 if (!isspace((unsigned char)ch)) 2850 /* We are not interested in trailing whitespace */ 2851 line_end = ptr; 2852 } 2853 2854 /* Save next 'to be processed' location */ 2855 cf->P_ptr = ptr; 2856 2857 /* Check we have a non-comment, non-blank line */ 2858 if (line_end == line || comment == line) { 2859 if (ch == 0) 2860 /* At end of file */ 2861 return NULL; 2862 /* Parse another line */ 2863 continue; 2864 } 2865 2866 /* We now have a line of data */ 2867 *line_end = 0; 2868 2869 if (flags & PARSE_RAW) { 2870 /* Leave '\' (etc) in line buffer (eg 'for' lines) */ 2871 *length = line_end - line; 2872 return line; 2873 } 2874 2875 if (flags & PARSE_SKIP) { 2876 /* Completely ignore non-directives */ 2877 if (line[0] != '.') 2878 continue; 2879 /* We could do more of the .else/.elif/.endif checks here */ 2880 } 2881 break; 2882 } 2883 2884 /* Brutally ignore anything after a non-escaped '#' in non-commands */ 2885 if (comment != NULL && line[0] != '\t') { 2886 line_end = comment; 2887 *line_end = 0; 2888 } 2889 2890 /* If we didn't see a '\\' then the in-situ data is fine */ 2891 if (escaped == NULL) { 2892 *length = line_end - line; 2893 return line; 2894 } 2895 2896 /* Remove escapes from '\n' and '#' */ 2897 tp = ptr = escaped; 2898 escaped = line; 2899 for (; ; *tp++ = ch) { 2900 ch = *ptr++; 2901 if (ch != '\\') { 2902 if (ch == 0) 2903 break; 2904 continue; 2905 } 2906 2907 ch = *ptr++; 2908 if (ch == 0) { 2909 /* Delete '\\' at end of buffer */ 2910 tp--; 2911 break; 2912 } 2913 2914 if (ch == '#' && line[0] != '\t') 2915 /* Delete '\\' from before '#' on non-command lines */ 2916 continue; 2917 2918 if (ch != '\n') { 2919 /* Leave '\\' in buffer for later */ 2920 *tp++ = '\\'; 2921 /* Make sure we don't delete an escaped ' ' from the line end */ 2922 escaped = tp + 1; 2923 continue; 2924 } 2925 2926 /* Escaped '\n' replace following whitespace with a single ' ' */ 2927 while (ptr[0] == ' ' || ptr[0] == '\t') 2928 ptr++; 2929 ch = ' '; 2930 } 2931 2932 /* Delete any trailing spaces - eg from empty continuations */ 2933 while (tp > escaped && isspace((unsigned char)tp[-1])) 2934 tp--; 2935 2936 *tp = 0; 2937 *length = tp - line; 2938 return line; 2939 } 2940 2941 /*- 2942 *--------------------------------------------------------------------- 2943 * ParseReadLine -- 2944 * Read an entire line from the input file. Called only by Parse_File. 2945 * 2946 * Results: 2947 * A line w/o its newline 2948 * 2949 * Side Effects: 2950 * Only those associated with reading a character 2951 *--------------------------------------------------------------------- 2952 */ 2953 static char * 2954 ParseReadLine(void) 2955 { 2956 char *line; /* Result */ 2957 int lineLength; /* Length of result */ 2958 int lineno; /* Saved line # */ 2959 int rval; 2960 2961 for (;;) { 2962 line = ParseGetLine(0, &lineLength); 2963 if (line == NULL) 2964 return NULL; 2965 2966 if (line[0] != '.') 2967 return line; 2968 2969 /* 2970 * The line might be a conditional. Ask the conditional module 2971 * about it and act accordingly 2972 */ 2973 switch (Cond_Eval(line)) { 2974 case COND_SKIP: 2975 /* Skip to next conditional that evaluates to COND_PARSE. */ 2976 do { 2977 line = ParseGetLine(PARSE_SKIP, &lineLength); 2978 } while (line && Cond_Eval(line) != COND_PARSE); 2979 if (line == NULL) 2980 break; 2981 continue; 2982 case COND_PARSE: 2983 continue; 2984 case COND_INVALID: /* Not a conditional line */ 2985 /* Check for .for loops */ 2986 rval = For_Eval(line); 2987 if (rval == 0) 2988 /* Not a .for line */ 2989 break; 2990 if (rval < 0) 2991 /* Syntax error - error printed, ignore line */ 2992 continue; 2993 /* Start of a .for loop */ 2994 lineno = curFile->lineno; 2995 /* Accumulate loop lines until matching .endfor */ 2996 do { 2997 line = ParseGetLine(PARSE_RAW, &lineLength); 2998 if (line == NULL) { 2999 Parse_Error(PARSE_FATAL, 3000 "Unexpected end of file in for loop."); 3001 break; 3002 } 3003 } while (For_Accum(line)); 3004 /* Stash each iteration as a new 'input file' */ 3005 For_Run(lineno); 3006 /* Read next line from for-loop buffer */ 3007 continue; 3008 } 3009 return line; 3010 } 3011 } 3012 3013 /*- 3014 *----------------------------------------------------------------------- 3015 * ParseFinishLine -- 3016 * Handle the end of a dependency group. 3017 * 3018 * Results: 3019 * Nothing. 3020 * 3021 * Side Effects: 3022 * inLine set FALSE. 'targets' list destroyed. 3023 * 3024 *----------------------------------------------------------------------- 3025 */ 3026 static void 3027 ParseFinishLine(void) 3028 { 3029 if (inLine) { 3030 Lst_ForEach(targets, Suff_EndTransform, NULL); 3031 Lst_Destroy(targets, ParseHasCommands); 3032 targets = NULL; 3033 inLine = FALSE; 3034 } 3035 } 3036 3037 3038 /*- 3039 *--------------------------------------------------------------------- 3040 * Parse_File -- 3041 * Parse a file into its component parts, incorporating it into the 3042 * current dependency graph. This is the main function and controls 3043 * almost every other function in this module 3044 * 3045 * Input: 3046 * name the name of the file being read 3047 * fd Open file to makefile to parse 3048 * 3049 * Results: 3050 * None 3051 * 3052 * Side Effects: 3053 * closes fd. 3054 * Loads. Nodes are added to the list of all targets, nodes and links 3055 * are added to the dependency graph. etc. etc. etc. 3056 *--------------------------------------------------------------------- 3057 */ 3058 void 3059 Parse_File(const char *name, int fd) 3060 { 3061 char *cp; /* pointer into the line */ 3062 char *line; /* the line we're working on */ 3063 struct loadedfile *lf; 3064 3065 lf = loadfile(name, fd); 3066 3067 inLine = FALSE; 3068 fatals = 0; 3069 3070 if (name == NULL) 3071 name = "(stdin)"; 3072 3073 Parse_SetInput(name, 0, -1, loadedfile_nextbuf, lf); 3074 curFile->lf = lf; 3075 3076 do { 3077 for (; (line = ParseReadLine()) != NULL; ) { 3078 if (DEBUG(PARSE)) 3079 fprintf(debug_file, "ParseReadLine (%d): '%s'\n", 3080 curFile->lineno, line); 3081 if (*line == '.') { 3082 /* 3083 * Lines that begin with the special character may be 3084 * include or undef directives. 3085 * On the other hand they can be suffix rules (.c.o: ...) 3086 * or just dependencies for filenames that start '.'. 3087 */ 3088 for (cp = line + 1; isspace((unsigned char)*cp); cp++) { 3089 continue; 3090 } 3091 if (IsInclude(cp, FALSE)) { 3092 ParseDoInclude(cp); 3093 continue; 3094 } 3095 if (strncmp(cp, "undef", 5) == 0) { 3096 char *cp2; 3097 for (cp += 5; isspace((unsigned char) *cp); cp++) 3098 continue; 3099 for (cp2 = cp; !isspace((unsigned char) *cp2) && 3100 *cp2 != '\0'; cp2++) 3101 continue; 3102 *cp2 = '\0'; 3103 Var_Delete(cp, VAR_GLOBAL); 3104 continue; 3105 } else if (strncmp(cp, "export", 6) == 0) { 3106 for (cp += 6; isspace((unsigned char) *cp); cp++) 3107 continue; 3108 Var_Export(cp, 1); 3109 continue; 3110 } else if (strncmp(cp, "unexport", 8) == 0) { 3111 Var_UnExport(cp); 3112 continue; 3113 } else if (strncmp(cp, "info", 4) == 0 || 3114 strncmp(cp, "error", 5) == 0 || 3115 strncmp(cp, "warning", 7) == 0) { 3116 if (ParseMessage(cp)) 3117 continue; 3118 } 3119 } 3120 3121 if (*line == '\t') { 3122 /* 3123 * If a line starts with a tab, it can only hope to be 3124 * a creation command. 3125 */ 3126 cp = line + 1; 3127 shellCommand: 3128 for (; isspace ((unsigned char)*cp); cp++) { 3129 continue; 3130 } 3131 if (*cp) { 3132 if (!inLine) 3133 Parse_Error(PARSE_FATAL, 3134 "Unassociated shell command \"%s\"", 3135 cp); 3136 /* 3137 * So long as it's not a blank line and we're actually 3138 * in a dependency spec, add the command to the list of 3139 * commands of all targets in the dependency spec 3140 */ 3141 if (targets) { 3142 cp = bmake_strdup(cp); 3143 Lst_ForEach(targets, ParseAddCmd, cp); 3144 #ifdef CLEANUP 3145 Lst_AtEnd(targCmds, cp); 3146 #endif 3147 } 3148 } 3149 continue; 3150 } 3151 3152 #ifdef SYSVINCLUDE 3153 if (IsSysVInclude(line)) { 3154 /* 3155 * It's an S3/S5-style "include". 3156 */ 3157 ParseTraditionalInclude(line); 3158 continue; 3159 } 3160 #endif 3161 #ifdef GMAKEEXPORT 3162 if (strncmp(line, "export", 6) == 0 && 3163 isspace((unsigned char) line[6]) && 3164 strchr(line, ':') == NULL) { 3165 /* 3166 * It's a Gmake "export". 3167 */ 3168 ParseGmakeExport(line); 3169 continue; 3170 } 3171 #endif 3172 if (Parse_IsVar(line)) { 3173 ParseFinishLine(); 3174 Parse_DoVar(line, VAR_GLOBAL); 3175 continue; 3176 } 3177 3178 #ifndef POSIX 3179 /* 3180 * To make life easier on novices, if the line is indented we 3181 * first make sure the line has a dependency operator in it. 3182 * If it doesn't have an operator and we're in a dependency 3183 * line's script, we assume it's actually a shell command 3184 * and add it to the current list of targets. 3185 */ 3186 cp = line; 3187 if (isspace((unsigned char) line[0])) { 3188 while (isspace((unsigned char) *cp)) 3189 cp++; 3190 while (*cp && (ParseIsEscaped(line, cp) || 3191 *cp != ':' && *cp != '!')) { 3192 cp++; 3193 } 3194 if (*cp == '\0') { 3195 if (inLine) { 3196 Parse_Error(PARSE_WARNING, 3197 "Shell command needs a leading tab"); 3198 goto shellCommand; 3199 } 3200 } 3201 } 3202 #endif 3203 ParseFinishLine(); 3204 3205 /* 3206 * For some reason - probably to make the parser impossible - 3207 * a ';' can be used to separate commands from dependencies. 3208 * Attempt to avoid ';' inside substitution patterns. 3209 */ 3210 { 3211 int level = 0; 3212 3213 for (cp = line; *cp != 0; cp++) { 3214 if (*cp == '\\' && cp[1] != 0) { 3215 cp++; 3216 continue; 3217 } 3218 if (*cp == '$' && 3219 (cp[1] == '(' || cp[1] == '{')) { 3220 level++; 3221 continue; 3222 } 3223 if (level > 0) { 3224 if (*cp == ')' || *cp == '}') { 3225 level--; 3226 continue; 3227 } 3228 } else if (*cp == ';') { 3229 break; 3230 } 3231 } 3232 } 3233 if (*cp != 0) 3234 /* Terminate the dependency list at the ';' */ 3235 *cp++ = 0; 3236 else 3237 cp = NULL; 3238 3239 /* 3240 * We now know it's a dependency line so it needs to have all 3241 * variables expanded before being parsed. Tell the variable 3242 * module to complain if some variable is undefined... 3243 */ 3244 line = Var_Subst(line, VAR_CMD, VARE_UNDEFERR|VARE_WANTRES); 3245 3246 /* 3247 * Need a non-circular list for the target nodes 3248 */ 3249 if (targets) 3250 Lst_Destroy(targets, NULL); 3251 3252 targets = Lst_Init(FALSE); 3253 inLine = TRUE; 3254 3255 ParseDoDependency(line); 3256 free(line); 3257 3258 /* If there were commands after a ';', add them now */ 3259 if (cp != NULL) { 3260 goto shellCommand; 3261 } 3262 } 3263 /* 3264 * Reached EOF, but it may be just EOF of an include file... 3265 */ 3266 } while (ParseEOF() == CONTINUE); 3267 3268 if (fatals) { 3269 (void)fflush(stdout); 3270 (void)fprintf(stderr, 3271 "%s: Fatal errors encountered -- cannot continue", 3272 progname); 3273 PrintOnError(NULL, NULL); 3274 exit(1); 3275 } 3276 } 3277 3278 /*- 3279 *--------------------------------------------------------------------- 3280 * Parse_Init -- 3281 * initialize the parsing module 3282 * 3283 * Results: 3284 * none 3285 * 3286 * Side Effects: 3287 * the parseIncPath list is initialized... 3288 *--------------------------------------------------------------------- 3289 */ 3290 void 3291 Parse_Init(void) 3292 { 3293 mainNode = NULL; 3294 parseIncPath = Lst_Init(FALSE); 3295 sysIncPath = Lst_Init(FALSE); 3296 defIncPath = Lst_Init(FALSE); 3297 includes = Lst_Init(FALSE); 3298 #ifdef CLEANUP 3299 targCmds = Lst_Init(FALSE); 3300 #endif 3301 } 3302 3303 void 3304 Parse_End(void) 3305 { 3306 #ifdef CLEANUP 3307 Lst_Destroy(targCmds, (FreeProc *)free); 3308 if (targets) 3309 Lst_Destroy(targets, NULL); 3310 Lst_Destroy(defIncPath, Dir_Destroy); 3311 Lst_Destroy(sysIncPath, Dir_Destroy); 3312 Lst_Destroy(parseIncPath, Dir_Destroy); 3313 Lst_Destroy(includes, NULL); /* Should be empty now */ 3314 #endif 3315 } 3316 3317 3318 /*- 3319 *----------------------------------------------------------------------- 3320 * Parse_MainName -- 3321 * Return a Lst of the main target to create for main()'s sake. If 3322 * no such target exists, we Punt with an obnoxious error message. 3323 * 3324 * Results: 3325 * A Lst of the single node to create. 3326 * 3327 * Side Effects: 3328 * None. 3329 * 3330 *----------------------------------------------------------------------- 3331 */ 3332 Lst 3333 Parse_MainName(void) 3334 { 3335 Lst mainList; /* result list */ 3336 3337 mainList = Lst_Init(FALSE); 3338 3339 if (mainNode == NULL) { 3340 Punt("no target to make."); 3341 /*NOTREACHED*/ 3342 } else if (mainNode->type & OP_DOUBLEDEP) { 3343 (void)Lst_AtEnd(mainList, mainNode); 3344 Lst_Concat(mainList, mainNode->cohorts, LST_CONCNEW); 3345 } 3346 else 3347 (void)Lst_AtEnd(mainList, mainNode); 3348 Var_Append(".TARGETS", mainNode->name, VAR_GLOBAL); 3349 return mainList; 3350 } 3351 3352 /*- 3353 *----------------------------------------------------------------------- 3354 * ParseMark -- 3355 * Add the filename and lineno to the GNode so that we remember 3356 * where it was first defined. 3357 * 3358 * Side Effects: 3359 * None. 3360 * 3361 *----------------------------------------------------------------------- 3362 */ 3363 static void 3364 ParseMark(GNode *gn) 3365 { 3366 gn->fname = curFile->fname; 3367 gn->lineno = curFile->lineno; 3368 } 3369
Indexes created Mon Sep 22 10:09:38 GMT 2025