parse.c revision 1.247
1 /* $NetBSD: parse.c,v 1.247 2020/08/03 20:26:09 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 1.247 2020/08/03 20:26:09 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 1.247 2020/08/03 20:26:09 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 bmake_free(cp2); 703 bmake_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 const char *dirend; 1295 while (isspace((unsigned char)*dirstart)) 1296 dirstart++; 1297 dirend = dirstart; 1298 while (isalnum((unsigned char)*dirend) || *dirend == '-') 1299 dirend++; 1300 Parse_Error(PARSE_FATAL, "Unknown directive \"%.*s\"", 1301 (int)(dirend - dirstart), dirstart); 1302 } else 1303 Parse_Error(PARSE_FATAL, "Need an operator"); 1304 goto out; 1305 } 1306 1307 /* Insert a null terminator. */ 1308 savec = *cp; 1309 *cp = '\0'; 1310 1311 /* 1312 * Got the word. See if it's a special target and if so set 1313 * specType to match it. 1314 */ 1315 if (*line == '.' && isupper ((unsigned char)line[1])) { 1316 /* 1317 * See if the target is a special target that must have it 1318 * or its sources handled specially. 1319 */ 1320 int keywd = ParseFindKeyword(line); 1321 if (keywd != -1) { 1322 if (specType == ExPath && parseKeywords[keywd].spec != ExPath) { 1323 Parse_Error(PARSE_FATAL, "Mismatched special targets"); 1324 goto out; 1325 } 1326 1327 specType = parseKeywords[keywd].spec; 1328 tOp = parseKeywords[keywd].op; 1329 1330 /* 1331 * Certain special targets have special semantics: 1332 * .PATH Have to set the dirSearchPath 1333 * variable too 1334 * .MAIN Its sources are only used if 1335 * nothing has been specified to 1336 * create. 1337 * .DEFAULT Need to create a node to hang 1338 * commands on, but we don't want 1339 * it in the graph, nor do we want 1340 * it to be the Main Target, so we 1341 * create it, set OP_NOTMAIN and 1342 * add it to the list, setting 1343 * DEFAULT to the new node for 1344 * later use. We claim the node is 1345 * A transformation rule to make 1346 * life easier later, when we'll 1347 * use Make_HandleUse to actually 1348 * apply the .DEFAULT commands. 1349 * .PHONY The list of targets 1350 * .NOPATH Don't search for file in the path 1351 * .STALE 1352 * .BEGIN 1353 * .END 1354 * .ERROR 1355 * .DELETE_ON_ERROR 1356 * .INTERRUPT Are not to be considered the 1357 * main target. 1358 * .NOTPARALLEL Make only one target at a time. 1359 * .SINGLESHELL Create a shell for each command. 1360 * .ORDER Must set initial predecessor to NULL 1361 */ 1362 switch (specType) { 1363 case ExPath: 1364 if (paths == NULL) { 1365 paths = Lst_Init(FALSE); 1366 } 1367 (void)Lst_AtEnd(paths, dirSearchPath); 1368 break; 1369 case Main: 1370 if (!Lst_IsEmpty(create)) { 1371 specType = Not; 1372 } 1373 break; 1374 case Begin: 1375 case End: 1376 case Stale: 1377 case dotError: 1378 case Interrupt: 1379 gn = Targ_FindNode(line, TARG_CREATE); 1380 if (doing_depend) 1381 ParseMark(gn); 1382 gn->type |= OP_NOTMAIN|OP_SPECIAL; 1383 (void)Lst_AtEnd(targets, gn); 1384 break; 1385 case Default: 1386 gn = Targ_NewGN(".DEFAULT"); 1387 gn->type |= (OP_NOTMAIN|OP_TRANSFORM); 1388 (void)Lst_AtEnd(targets, gn); 1389 DEFAULT = gn; 1390 break; 1391 case DeleteOnError: 1392 deleteOnError = TRUE; 1393 break; 1394 case NotParallel: 1395 maxJobs = 1; 1396 break; 1397 case SingleShell: 1398 compatMake = TRUE; 1399 break; 1400 case Order: 1401 predecessor = NULL; 1402 break; 1403 default: 1404 break; 1405 } 1406 } else if (strncmp(line, ".PATH", 5) == 0) { 1407 /* 1408 * .PATH<suffix> has to be handled specially. 1409 * Call on the suffix module to give us a path to 1410 * modify. 1411 */ 1412 Lst path; 1413 1414 specType = ExPath; 1415 path = Suff_GetPath(&line[5]); 1416 if (path == NULL) { 1417 Parse_Error(PARSE_FATAL, 1418 "Suffix '%s' not defined (yet)", 1419 &line[5]); 1420 goto out; 1421 } else { 1422 if (paths == NULL) { 1423 paths = Lst_Init(FALSE); 1424 } 1425 (void)Lst_AtEnd(paths, path); 1426 } 1427 } 1428 } 1429 1430 /* 1431 * Have word in line. Get or create its node and stick it at 1432 * the end of the targets list 1433 */ 1434 if (specType == Not && *line != '\0') { 1435 if (Dir_HasWildcards(line)) { 1436 /* 1437 * Targets are to be sought only in the current directory, 1438 * so create an empty path for the thing. Note we need to 1439 * use Dir_Destroy in the destruction of the path as the 1440 * Dir module could have added a directory to the path... 1441 */ 1442 Lst emptyPath = Lst_Init(FALSE); 1443 1444 Dir_Expand(line, emptyPath, curTargs); 1445 1446 Lst_Destroy(emptyPath, Dir_Destroy); 1447 } else { 1448 /* 1449 * No wildcards, but we want to avoid code duplication, 1450 * so create a list with the word on it. 1451 */ 1452 (void)Lst_AtEnd(curTargs, line); 1453 } 1454 1455 /* Apply the targets. */ 1456 1457 while(!Lst_IsEmpty(curTargs)) { 1458 char *targName = (char *)Lst_DeQueue(curTargs); 1459 1460 if (!Suff_IsTransform (targName)) { 1461 gn = Targ_FindNode(targName, TARG_CREATE); 1462 } else { 1463 gn = Suff_AddTransform(targName); 1464 } 1465 if (doing_depend) 1466 ParseMark(gn); 1467 1468 (void)Lst_AtEnd(targets, gn); 1469 } 1470 } else if (specType == ExPath && *line != '.' && *line != '\0') { 1471 Parse_Error(PARSE_WARNING, "Extra target (%s) ignored", line); 1472 } 1473 1474 /* Don't need the inserted null terminator any more. */ 1475 *cp = savec; 1476 1477 /* 1478 * If it is a special type and not .PATH, it's the only target we 1479 * allow on this line... 1480 */ 1481 if (specType != Not && specType != ExPath) { 1482 Boolean warning = FALSE; 1483 1484 while (*cp && (ParseIsEscaped(lstart, cp) || 1485 (*cp != '!' && *cp != ':'))) { 1486 if (ParseIsEscaped(lstart, cp) || 1487 (*cp != ' ' && *cp != '\t')) { 1488 warning = TRUE; 1489 } 1490 cp++; 1491 } 1492 if (warning) { 1493 Parse_Error(PARSE_WARNING, "Extra target ignored"); 1494 } 1495 } else { 1496 while (*cp && isspace ((unsigned char)*cp)) { 1497 cp++; 1498 } 1499 } 1500 line = cp; 1501 } while (*line && (ParseIsEscaped(lstart, line) || 1502 (*line != '!' && *line != ':'))); 1503 1504 /* 1505 * Don't need the list of target names anymore... 1506 */ 1507 Lst_Destroy(curTargs, NULL); 1508 curTargs = NULL; 1509 1510 if (!Lst_IsEmpty(targets)) { 1511 switch(specType) { 1512 default: 1513 Parse_Error(PARSE_WARNING, "Special and mundane targets don't mix. Mundane ones ignored"); 1514 break; 1515 case Default: 1516 case Stale: 1517 case Begin: 1518 case End: 1519 case dotError: 1520 case Interrupt: 1521 /* 1522 * These four create nodes on which to hang commands, so 1523 * targets shouldn't be empty... 1524 */ 1525 case Not: 1526 /* 1527 * Nothing special here -- targets can be empty if it wants. 1528 */ 1529 break; 1530 } 1531 } 1532 1533 /* 1534 * Have now parsed all the target names. Must parse the operator next. The 1535 * result is left in op . 1536 */ 1537 if (*cp == '!') { 1538 op = OP_FORCE; 1539 } else if (*cp == ':') { 1540 if (cp[1] == ':') { 1541 op = OP_DOUBLEDEP; 1542 cp++; 1543 } else { 1544 op = OP_DEPENDS; 1545 } 1546 } else { 1547 Parse_Error(PARSE_FATAL, lstart[0] == '.' ? "Unknown directive" 1548 : "Missing dependency operator"); 1549 goto out; 1550 } 1551 1552 /* Advance beyond the operator */ 1553 cp++; 1554 1555 /* 1556 * Apply the operator to the target. This is how we remember which 1557 * operator a target was defined with. It fails if the operator 1558 * used isn't consistent across all references. 1559 */ 1560 Lst_ForEach(targets, ParseDoOp, &op); 1561 1562 /* 1563 * Onward to the sources. 1564 * 1565 * LINE will now point to the first source word, if any, or the 1566 * end of the string if not. 1567 */ 1568 while (*cp && isspace ((unsigned char)*cp)) { 1569 cp++; 1570 } 1571 line = cp; 1572 1573 /* 1574 * Several special targets take different actions if present with no 1575 * sources: 1576 * a .SUFFIXES line with no sources clears out all old suffixes 1577 * a .PRECIOUS line makes all targets precious 1578 * a .IGNORE line ignores errors for all targets 1579 * a .SILENT line creates silence when making all targets 1580 * a .PATH removes all directories from the search path(s). 1581 */ 1582 if (!*line) { 1583 switch (specType) { 1584 case Suffixes: 1585 Suff_ClearSuffixes(); 1586 break; 1587 case Precious: 1588 allPrecious = TRUE; 1589 break; 1590 case Ignore: 1591 ignoreErrors = TRUE; 1592 break; 1593 case Silent: 1594 beSilent = TRUE; 1595 break; 1596 case ExPath: 1597 Lst_ForEach(paths, ParseClearPath, NULL); 1598 Dir_SetPATH(); 1599 break; 1600 #ifdef POSIX 1601 case Posix: 1602 Var_Set("%POSIX", "1003.2", VAR_GLOBAL); 1603 break; 1604 #endif 1605 default: 1606 break; 1607 } 1608 } else if (specType == MFlags) { 1609 /* 1610 * Call on functions in main.c to deal with these arguments and 1611 * set the initial character to a null-character so the loop to 1612 * get sources won't get anything 1613 */ 1614 Main_ParseArgLine(line); 1615 *line = '\0'; 1616 } else if (specType == ExShell) { 1617 if (Job_ParseShell(line) != SUCCESS) { 1618 Parse_Error(PARSE_FATAL, "improper shell specification"); 1619 goto out; 1620 } 1621 *line = '\0'; 1622 } else if (specType == NotParallel || specType == SingleShell || 1623 specType == DeleteOnError) { 1624 *line = '\0'; 1625 } 1626 1627 /* 1628 * NOW GO FOR THE SOURCES 1629 */ 1630 if (specType == Suffixes || specType == ExPath || 1631 specType == Includes || specType == Libs || 1632 specType == Null || specType == ExObjdir) 1633 { 1634 while (*line) { 1635 /* 1636 * If the target was one that doesn't take files as its sources 1637 * but takes something like suffixes, we take each 1638 * space-separated word on the line as a something and deal 1639 * with it accordingly. 1640 * 1641 * If the target was .SUFFIXES, we take each source as a 1642 * suffix and add it to the list of suffixes maintained by the 1643 * Suff module. 1644 * 1645 * If the target was a .PATH, we add the source as a directory 1646 * to search on the search path. 1647 * 1648 * If it was .INCLUDES, the source is taken to be the suffix of 1649 * files which will be #included and whose search path should 1650 * be present in the .INCLUDES variable. 1651 * 1652 * If it was .LIBS, the source is taken to be the suffix of 1653 * files which are considered libraries and whose search path 1654 * should be present in the .LIBS variable. 1655 * 1656 * If it was .NULL, the source is the suffix to use when a file 1657 * has no valid suffix. 1658 * 1659 * If it was .OBJDIR, the source is a new definition for .OBJDIR, 1660 * and will cause make to do a new chdir to that path. 1661 */ 1662 while (*cp && !isspace ((unsigned char)*cp)) { 1663 cp++; 1664 } 1665 savec = *cp; 1666 *cp = '\0'; 1667 switch (specType) { 1668 case Suffixes: 1669 Suff_AddSuffix(line, &mainNode); 1670 break; 1671 case ExPath: 1672 Lst_ForEach(paths, ParseAddDir, line); 1673 break; 1674 case Includes: 1675 Suff_AddInclude(line); 1676 break; 1677 case Libs: 1678 Suff_AddLib(line); 1679 break; 1680 case Null: 1681 Suff_SetNull(line); 1682 break; 1683 case ExObjdir: 1684 Main_SetObjdir("%s", line); 1685 break; 1686 default: 1687 break; 1688 } 1689 *cp = savec; 1690 if (savec != '\0') { 1691 cp++; 1692 } 1693 while (*cp && isspace ((unsigned char)*cp)) { 1694 cp++; 1695 } 1696 line = cp; 1697 } 1698 if (paths) { 1699 Lst_Destroy(paths, NULL); 1700 paths = NULL; 1701 } 1702 if (specType == ExPath) 1703 Dir_SetPATH(); 1704 } else { 1705 assert(paths == NULL); 1706 while (*line) { 1707 /* 1708 * The targets take real sources, so we must beware of archive 1709 * specifications (i.e. things with left parentheses in them) 1710 * and handle them accordingly. 1711 */ 1712 for (; *cp && !isspace ((unsigned char)*cp); cp++) { 1713 if (*cp == LPAREN && cp > line && cp[-1] != '$') { 1714 /* 1715 * Only stop for a left parenthesis if it isn't at the 1716 * start of a word (that'll be for variable changes 1717 * later) and isn't preceded by a dollar sign (a dynamic 1718 * source). 1719 */ 1720 break; 1721 } 1722 } 1723 1724 if (*cp == LPAREN) { 1725 sources = Lst_Init(FALSE); 1726 if (Arch_ParseArchive(&line, sources, VAR_CMD) != SUCCESS) { 1727 Parse_Error(PARSE_FATAL, 1728 "Error in source archive spec \"%s\"", line); 1729 goto out; 1730 } 1731 1732 while (!Lst_IsEmpty (sources)) { 1733 gn = (GNode *)Lst_DeQueue(sources); 1734 ParseDoSrc(tOp, gn->name); 1735 } 1736 Lst_Destroy(sources, NULL); 1737 cp = line; 1738 } else { 1739 if (*cp) { 1740 *cp = '\0'; 1741 cp += 1; 1742 } 1743 1744 ParseDoSrc(tOp, line); 1745 } 1746 while (*cp && isspace ((unsigned char)*cp)) { 1747 cp++; 1748 } 1749 line = cp; 1750 } 1751 } 1752 1753 if (mainNode == NULL) { 1754 /* 1755 * If we have yet to decide on a main target to make, in the 1756 * absence of any user input, we want the first target on 1757 * the first dependency line that is actually a real target 1758 * (i.e. isn't a .USE or .EXEC rule) to be made. 1759 */ 1760 Lst_ForEach(targets, ParseFindMain, NULL); 1761 } 1762 1763 out: 1764 if (paths) 1765 Lst_Destroy(paths, NULL); 1766 if (curTargs) 1767 Lst_Destroy(curTargs, NULL); 1768 } 1769 1770 /*- 1771 *--------------------------------------------------------------------- 1772 * Parse_IsVar -- 1773 * Return TRUE if the passed line is a variable assignment. A variable 1774 * assignment consists of a single word followed by optional whitespace 1775 * followed by either a += or an = operator. 1776 * This function is used both by the Parse_File function and main when 1777 * parsing the command-line arguments. 1778 * 1779 * Input: 1780 * line the line to check 1781 * 1782 * Results: 1783 * TRUE if it is. FALSE if it ain't 1784 * 1785 * Side Effects: 1786 * none 1787 *--------------------------------------------------------------------- 1788 */ 1789 Boolean 1790 Parse_IsVar(char *line) 1791 { 1792 Boolean wasSpace = FALSE; /* set TRUE if found a space */ 1793 char ch; 1794 int level = 0; 1795 #define ISEQOPERATOR(c) \ 1796 (((c) == '+') || ((c) == ':') || ((c) == '?') || ((c) == '!')) 1797 1798 /* 1799 * Skip to variable name 1800 */ 1801 while (*line == ' ' || *line == '\t') 1802 line++; 1803 1804 /* Scan for one of the assignment operators outside a variable expansion */ 1805 while ((ch = *line++) != 0) { 1806 if (ch == '(' || ch == '{') { 1807 level++; 1808 continue; 1809 } 1810 if (ch == ')' || ch == '}') { 1811 level--; 1812 continue; 1813 } 1814 if (level != 0) 1815 continue; 1816 while (ch == ' ' || ch == '\t') { 1817 ch = *line++; 1818 wasSpace = TRUE; 1819 } 1820 #ifdef SUNSHCMD 1821 if (ch == ':' && strncmp(line, "sh", 2) == 0) { 1822 line += 2; 1823 continue; 1824 } 1825 #endif 1826 if (ch == '=') 1827 return TRUE; 1828 if (*line == '=' && ISEQOPERATOR(ch)) 1829 return TRUE; 1830 if (wasSpace) 1831 return FALSE; 1832 } 1833 1834 return FALSE; 1835 } 1836 1837 /*- 1838 *--------------------------------------------------------------------- 1839 * Parse_DoVar -- 1840 * Take the variable assignment in the passed line and do it in the 1841 * global context. 1842 * 1843 * Note: There is a lexical ambiguity with assignment modifier characters 1844 * in variable names. This routine interprets the character before the = 1845 * as a modifier. Therefore, an assignment like 1846 * C++=/usr/bin/CC 1847 * is interpreted as "C+ +=" instead of "C++ =". 1848 * 1849 * Input: 1850 * line a line guaranteed to be a variable assignment. 1851 * This reduces error checks 1852 * ctxt Context in which to do the assignment 1853 * 1854 * Results: 1855 * none 1856 * 1857 * Side Effects: 1858 * the variable structure of the given variable name is altered in the 1859 * global context. 1860 *--------------------------------------------------------------------- 1861 */ 1862 void 1863 Parse_DoVar(char *line, GNode *ctxt) 1864 { 1865 char *cp; /* pointer into line */ 1866 enum { 1867 VAR_SUBST, VAR_APPEND, VAR_SHELL, VAR_NORMAL 1868 } type; /* Type of assignment */ 1869 char *opc; /* ptr to operator character to 1870 * null-terminate the variable name */ 1871 Boolean freeCp = FALSE; /* TRUE if cp needs to be freed, 1872 * i.e. if any variable expansion was 1873 * performed */ 1874 int depth; 1875 1876 /* 1877 * Skip to variable name 1878 */ 1879 while (*line == ' ' || *line == '\t') 1880 line++; 1881 1882 /* 1883 * Skip to operator character, nulling out whitespace as we go 1884 * XXX Rather than counting () and {} we should look for $ and 1885 * then expand the variable. 1886 */ 1887 for (depth = 0, cp = line + 1; depth > 0 || *cp != '='; cp++) { 1888 if (*cp == '(' || *cp == '{') { 1889 depth++; 1890 continue; 1891 } 1892 if (*cp == ')' || *cp == '}') { 1893 depth--; 1894 continue; 1895 } 1896 if (depth == 0 && isspace ((unsigned char)*cp)) { 1897 *cp = '\0'; 1898 } 1899 } 1900 opc = cp-1; /* operator is the previous character */ 1901 *cp++ = '\0'; /* nuke the = */ 1902 1903 /* 1904 * Check operator type 1905 */ 1906 switch (*opc) { 1907 case '+': 1908 type = VAR_APPEND; 1909 *opc = '\0'; 1910 break; 1911 1912 case '?': 1913 /* 1914 * If the variable already has a value, we don't do anything. 1915 */ 1916 *opc = '\0'; 1917 if (Var_Exists(line, ctxt)) { 1918 return; 1919 } else { 1920 type = VAR_NORMAL; 1921 } 1922 break; 1923 1924 case ':': 1925 type = VAR_SUBST; 1926 *opc = '\0'; 1927 break; 1928 1929 case '!': 1930 type = VAR_SHELL; 1931 *opc = '\0'; 1932 break; 1933 1934 default: 1935 #ifdef SUNSHCMD 1936 while (opc > line && *opc != ':') 1937 opc--; 1938 1939 if (strncmp(opc, ":sh", 3) == 0) { 1940 type = VAR_SHELL; 1941 *opc = '\0'; 1942 break; 1943 } 1944 #endif 1945 type = VAR_NORMAL; 1946 break; 1947 } 1948 1949 while (isspace((unsigned char)*cp)) 1950 cp++; 1951 1952 if (DEBUG(LINT)) { 1953 if (type != VAR_SUBST && strchr(cp, '$') != NULL) { 1954 /* sanity check now */ 1955 char *cp2; 1956 1957 cp2 = Var_Subst(cp, ctxt, VARE_WANTRES|VARE_ASSIGN); 1958 free(cp2); 1959 } 1960 } 1961 1962 if (type == VAR_APPEND) { 1963 Var_Append(line, cp, ctxt); 1964 } else if (type == VAR_SUBST) { 1965 /* 1966 * Allow variables in the old value to be undefined, but leave their 1967 * invocation alone -- this is done by forcing oldVars to be false. 1968 * XXX: This can cause recursive variables, but that's not hard to do, 1969 * and this allows someone to do something like 1970 * 1971 * CFLAGS = $(.INCLUDES) 1972 * CFLAGS := -I.. $(CFLAGS) 1973 * 1974 * And not get an error. 1975 */ 1976 Boolean oldOldVars = oldVars; 1977 1978 oldVars = FALSE; 1979 1980 /* 1981 * make sure that we set the variable the first time to nothing 1982 * so that it gets substituted! 1983 */ 1984 if (!Var_Exists(line, ctxt)) 1985 Var_Set(line, "", ctxt); 1986 1987 cp = Var_Subst(cp, ctxt, VARE_WANTRES|VARE_ASSIGN); 1988 oldVars = oldOldVars; 1989 freeCp = TRUE; 1990 1991 Var_Set(line, cp, ctxt); 1992 } else if (type == VAR_SHELL) { 1993 char *res; 1994 const char *error; 1995 1996 if (strchr(cp, '$') != NULL) { 1997 /* 1998 * There's a dollar sign in the command, so perform variable 1999 * expansion on the whole thing. The resulting string will need 2000 * freeing when we're done. 2001 */ 2002 cp = Var_Subst(cp, VAR_CMD, VARE_UNDEFERR|VARE_WANTRES); 2003 freeCp = TRUE; 2004 } 2005 2006 res = Cmd_Exec(cp, &error); 2007 Var_Set(line, res, ctxt); 2008 free(res); 2009 2010 if (error) 2011 Parse_Error(PARSE_WARNING, error, cp); 2012 } else { 2013 /* 2014 * Normal assignment -- just do it. 2015 */ 2016 Var_Set(line, cp, ctxt); 2017 } 2018 if (strcmp(line, MAKEOVERRIDES) == 0) 2019 Main_ExportMAKEFLAGS(FALSE); /* re-export MAKEFLAGS */ 2020 else if (strcmp(line, ".CURDIR") == 0) { 2021 /* 2022 * Somone is being (too?) clever... 2023 * Let's pretend they know what they are doing and 2024 * re-initialize the 'cur' Path. 2025 */ 2026 Dir_InitCur(cp); 2027 Dir_SetPATH(); 2028 } else if (strcmp(line, MAKE_JOB_PREFIX) == 0) { 2029 Job_SetPrefix(); 2030 } else if (strcmp(line, MAKE_EXPORTED) == 0) { 2031 Var_Export(cp, 0); 2032 } 2033 if (freeCp) 2034 free(cp); 2035 } 2036 2037 2038 /* 2039 * ParseMaybeSubMake -- 2040 * Scan the command string to see if it a possible submake node 2041 * Input: 2042 * cmd the command to scan 2043 * Results: 2044 * TRUE if the command is possibly a submake, FALSE if not. 2045 */ 2046 static Boolean 2047 ParseMaybeSubMake(const char *cmd) 2048 { 2049 size_t i; 2050 static struct { 2051 const char *name; 2052 size_t len; 2053 } vals[] = { 2054 #define MKV(A) { A, sizeof(A) - 1 } 2055 MKV("${MAKE}"), 2056 MKV("${.MAKE}"), 2057 MKV("$(MAKE)"), 2058 MKV("$(.MAKE)"), 2059 MKV("make"), 2060 }; 2061 for (i = 0; i < sizeof(vals)/sizeof(vals[0]); i++) { 2062 char *ptr; 2063 if ((ptr = strstr(cmd, vals[i].name)) == NULL) 2064 continue; 2065 if ((ptr == cmd || !isalnum((unsigned char)ptr[-1])) 2066 && !isalnum((unsigned char)ptr[vals[i].len])) 2067 return TRUE; 2068 } 2069 return FALSE; 2070 } 2071 2072 /*- 2073 * ParseAddCmd -- 2074 * Lst_ForEach function to add a command line to all targets 2075 * 2076 * Input: 2077 * gnp the node to which the command is to be added 2078 * cmd the command to add 2079 * 2080 * Results: 2081 * Always 0 2082 * 2083 * Side Effects: 2084 * A new element is added to the commands list of the node, 2085 * and the node can be marked as a submake node if the command is 2086 * determined to be that. 2087 */ 2088 static int 2089 ParseAddCmd(void *gnp, void *cmd) 2090 { 2091 GNode *gn = (GNode *)gnp; 2092 2093 /* Add to last (ie current) cohort for :: targets */ 2094 if ((gn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (gn->cohorts)) 2095 gn = (GNode *)Lst_Datum(Lst_Last(gn->cohorts)); 2096 2097 /* if target already supplied, ignore commands */ 2098 if (!(gn->type & OP_HAS_COMMANDS)) { 2099 (void)Lst_AtEnd(gn->commands, cmd); 2100 if (ParseMaybeSubMake(cmd)) 2101 gn->type |= OP_SUBMAKE; 2102 ParseMark(gn); 2103 } else { 2104 #ifdef notyet 2105 /* XXX: We cannot do this until we fix the tree */ 2106 (void)Lst_AtEnd(gn->commands, cmd); 2107 Parse_Error(PARSE_WARNING, 2108 "overriding commands for target \"%s\"; " 2109 "previous commands defined at %s: %d ignored", 2110 gn->name, gn->fname, gn->lineno); 2111 #else 2112 Parse_Error(PARSE_WARNING, 2113 "duplicate script for target \"%s\" ignored", 2114 gn->name); 2115 ParseErrorInternal(gn->fname, gn->lineno, PARSE_WARNING, 2116 "using previous script for \"%s\" defined here", 2117 gn->name); 2118 #endif 2119 } 2120 return 0; 2121 } 2122 2123 /*- 2124 *----------------------------------------------------------------------- 2125 * ParseHasCommands -- 2126 * Callback procedure for Parse_File when destroying the list of 2127 * targets on the last dependency line. Marks a target as already 2128 * having commands if it does, to keep from having shell commands 2129 * on multiple dependency lines. 2130 * 2131 * Input: 2132 * gnp Node to examine 2133 * 2134 * Results: 2135 * None 2136 * 2137 * Side Effects: 2138 * OP_HAS_COMMANDS may be set for the target. 2139 * 2140 *----------------------------------------------------------------------- 2141 */ 2142 static void 2143 ParseHasCommands(void *gnp) 2144 { 2145 GNode *gn = (GNode *)gnp; 2146 if (!Lst_IsEmpty(gn->commands)) { 2147 gn->type |= OP_HAS_COMMANDS; 2148 } 2149 } 2150 2151 /*- 2152 *----------------------------------------------------------------------- 2153 * Parse_AddIncludeDir -- 2154 * Add a directory to the path searched for included makefiles 2155 * bracketed by double-quotes. Used by functions in main.c 2156 * 2157 * Input: 2158 * dir The name of the directory to add 2159 * 2160 * Results: 2161 * None. 2162 * 2163 * Side Effects: 2164 * The directory is appended to the list. 2165 * 2166 *----------------------------------------------------------------------- 2167 */ 2168 void 2169 Parse_AddIncludeDir(char *dir) 2170 { 2171 (void)Dir_AddDir(parseIncPath, dir); 2172 } 2173 2174 /*- 2175 *--------------------------------------------------------------------- 2176 * ParseDoInclude -- 2177 * Push to another file. 2178 * 2179 * The input is the line minus the `.'. A file spec is a string 2180 * enclosed in <> or "". The former is looked for only in sysIncPath. 2181 * The latter in . and the directories specified by -I command line 2182 * options 2183 * 2184 * Results: 2185 * None 2186 * 2187 * Side Effects: 2188 * A structure is added to the includes Lst and readProc, lineno, 2189 * fname and curFILE are altered for the new file 2190 *--------------------------------------------------------------------- 2191 */ 2192 2193 static void 2194 Parse_include_file(char *file, Boolean isSystem, Boolean depinc, int silent) 2195 { 2196 struct loadedfile *lf; 2197 char *fullname; /* full pathname of file */ 2198 char *newName; 2199 char *prefEnd, *incdir; 2200 int fd; 2201 int i; 2202 2203 /* 2204 * Now we know the file's name and its search path, we attempt to 2205 * find the durn thing. A return of NULL indicates the file don't 2206 * exist. 2207 */ 2208 fullname = file[0] == '/' ? bmake_strdup(file) : NULL; 2209 2210 if (fullname == NULL && !isSystem) { 2211 /* 2212 * Include files contained in double-quotes are first searched for 2213 * relative to the including file's location. We don't want to 2214 * cd there, of course, so we just tack on the old file's 2215 * leading path components and call Dir_FindFile to see if 2216 * we can locate the beast. 2217 */ 2218 2219 incdir = bmake_strdup(curFile->fname); 2220 prefEnd = strrchr(incdir, '/'); 2221 if (prefEnd != NULL) { 2222 *prefEnd = '\0'; 2223 /* Now do lexical processing of leading "../" on the filename */ 2224 for (i = 0; strncmp(file + i, "../", 3) == 0; i += 3) { 2225 prefEnd = strrchr(incdir + 1, '/'); 2226 if (prefEnd == NULL || strcmp(prefEnd, "/..") == 0) 2227 break; 2228 *prefEnd = '\0'; 2229 } 2230 newName = str_concat(incdir, file + i, STR_ADDSLASH); 2231 fullname = Dir_FindFile(newName, parseIncPath); 2232 if (fullname == NULL) 2233 fullname = Dir_FindFile(newName, dirSearchPath); 2234 free(newName); 2235 } 2236 free(incdir); 2237 2238 if (fullname == NULL) { 2239 /* 2240 * Makefile wasn't found in same directory as included makefile. 2241 * Search for it first on the -I search path, 2242 * then on the .PATH search path, if not found in a -I directory. 2243 * If we have a suffix specific path we should use that. 2244 */ 2245 char *suff; 2246 Lst suffPath = NULL; 2247 2248 if ((suff = strrchr(file, '.'))) { 2249 suffPath = Suff_GetPath(suff); 2250 if (suffPath != NULL) { 2251 fullname = Dir_FindFile(file, suffPath); 2252 } 2253 } 2254 if (fullname == NULL) { 2255 fullname = Dir_FindFile(file, parseIncPath); 2256 if (fullname == NULL) { 2257 fullname = Dir_FindFile(file, dirSearchPath); 2258 } 2259 } 2260 } 2261 } 2262 2263 /* Looking for a system file or file still not found */ 2264 if (fullname == NULL) { 2265 /* 2266 * Look for it on the system path 2267 */ 2268 fullname = Dir_FindFile(file, 2269 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath); 2270 } 2271 2272 if (fullname == NULL) { 2273 if (!silent) 2274 Parse_Error(PARSE_FATAL, "Could not find %s", file); 2275 return; 2276 } 2277 2278 /* Actually open the file... */ 2279 fd = open(fullname, O_RDONLY); 2280 if (fd == -1) { 2281 if (!silent) 2282 Parse_Error(PARSE_FATAL, "Cannot open %s", fullname); 2283 free(fullname); 2284 return; 2285 } 2286 2287 /* load it */ 2288 lf = loadfile(fullname, fd); 2289 2290 ParseSetIncludedFile(); 2291 /* Start reading from this file next */ 2292 Parse_SetInput(fullname, 0, -1, loadedfile_nextbuf, lf); 2293 curFile->lf = lf; 2294 if (depinc) 2295 doing_depend = depinc; /* only turn it on */ 2296 } 2297 2298 static void 2299 ParseDoInclude(char *line) 2300 { 2301 char endc; /* the character which ends the file spec */ 2302 char *cp; /* current position in file spec */ 2303 int silent = *line != 'i'; 2304 char *file = &line[7 + silent]; 2305 2306 /* Skip to delimiter character so we know where to look */ 2307 while (*file == ' ' || *file == '\t') 2308 file++; 2309 2310 if (*file != '"' && *file != '<') { 2311 Parse_Error(PARSE_FATAL, 2312 ".include filename must be delimited by '\"' or '<'"); 2313 return; 2314 } 2315 2316 /* 2317 * Set the search path on which to find the include file based on the 2318 * characters which bracket its name. Angle-brackets imply it's 2319 * a system Makefile while double-quotes imply it's a user makefile 2320 */ 2321 if (*file == '<') { 2322 endc = '>'; 2323 } else { 2324 endc = '"'; 2325 } 2326 2327 /* Skip to matching delimiter */ 2328 for (cp = ++file; *cp && *cp != endc; cp++) 2329 continue; 2330 2331 if (*cp != endc) { 2332 Parse_Error(PARSE_FATAL, 2333 "Unclosed %cinclude filename. '%c' expected", 2334 '.', endc); 2335 return; 2336 } 2337 *cp = '\0'; 2338 2339 /* 2340 * Substitute for any variables in the file name before trying to 2341 * find the thing. 2342 */ 2343 file = Var_Subst(file, VAR_CMD, VARE_WANTRES); 2344 2345 Parse_include_file(file, endc == '>', *line == 'd', silent); 2346 free(file); 2347 } 2348 2349 2350 /*- 2351 *--------------------------------------------------------------------- 2352 * ParseSetIncludedFile -- 2353 * Set the .INCLUDEDFROMFILE variable to the contents of .PARSEFILE 2354 * and the .INCLUDEDFROMDIR variable to the contents of .PARSEDIR 2355 * 2356 * Results: 2357 * None 2358 * 2359 * Side Effects: 2360 * The .INCLUDEDFROMFILE variable is overwritten by the contents 2361 * of .PARSEFILE and the .INCLUDEDFROMDIR variable is overwriten 2362 * by the contents of .PARSEDIR 2363 *--------------------------------------------------------------------- 2364 */ 2365 static void 2366 ParseSetIncludedFile(void) 2367 { 2368 const char *pf, *pd; 2369 char *pf_freeIt, *pd_freeIt; 2370 2371 pf = Var_Value(".PARSEFILE", VAR_GLOBAL, &pf_freeIt); 2372 Var_Set(".INCLUDEDFROMFILE", pf, VAR_GLOBAL); 2373 pd = Var_Value(".PARSEDIR", VAR_GLOBAL, &pd_freeIt); 2374 Var_Set(".INCLUDEDFROMDIR", pd, VAR_GLOBAL); 2375 2376 if (DEBUG(PARSE)) 2377 fprintf(debug_file, "%s: ${.INCLUDEDFROMDIR} = `%s' " 2378 "${.INCLUDEDFROMFILE} = `%s'\n", __func__, pd, pf); 2379 2380 bmake_free(pf_freeIt); 2381 bmake_free(pd_freeIt); 2382 } 2383 /*- 2384 *--------------------------------------------------------------------- 2385 * ParseSetParseFile -- 2386 * Set the .PARSEDIR and .PARSEFILE variables to the dirname and 2387 * basename of the given filename 2388 * 2389 * Results: 2390 * None 2391 * 2392 * Side Effects: 2393 * The .PARSEDIR and .PARSEFILE variables are overwritten by the 2394 * dirname and basename of the given filename. 2395 *--------------------------------------------------------------------- 2396 */ 2397 static void 2398 ParseSetParseFile(const char *filename) 2399 { 2400 char *slash, *dirname; 2401 const char *pd, *pf; 2402 int len; 2403 2404 slash = strrchr(filename, '/'); 2405 if (slash == NULL) { 2406 Var_Set(".PARSEDIR", pd = curdir, VAR_GLOBAL); 2407 Var_Set(".PARSEFILE", pf = filename, VAR_GLOBAL); 2408 dirname= NULL; 2409 } else { 2410 len = slash - filename; 2411 dirname = bmake_malloc(len + 1); 2412 memcpy(dirname, filename, len); 2413 dirname[len] = '\0'; 2414 Var_Set(".PARSEDIR", pd = dirname, VAR_GLOBAL); 2415 Var_Set(".PARSEFILE", pf = slash + 1, VAR_GLOBAL); 2416 } 2417 if (DEBUG(PARSE)) 2418 fprintf(debug_file, "%s: ${.PARSEDIR} = `%s' ${.PARSEFILE} = `%s'\n", 2419 __func__, pd, pf); 2420 free(dirname); 2421 } 2422 2423 /* 2424 * Track the makefiles we read - so makefiles can 2425 * set dependencies on them. 2426 * Avoid adding anything more than once. 2427 */ 2428 2429 static void 2430 ParseTrackInput(const char *name) 2431 { 2432 char *fp = NULL; 2433 2434 const char *old = Var_Value(MAKE_MAKEFILES, VAR_GLOBAL, &fp); 2435 if (old) { 2436 size_t name_len = strlen(name); 2437 const char *ep = old + strlen(old) - name_len; 2438 /* does it contain name? */ 2439 for (; old != NULL; old = strchr(old, ' ')) { 2440 if (*old == ' ') 2441 old++; 2442 if (old >= ep) 2443 break; /* cannot contain name */ 2444 if (memcmp(old, name, name_len) == 0 2445 && (old[name_len] == 0 || old[name_len] == ' ')) 2446 goto cleanup; 2447 } 2448 } 2449 Var_Append (MAKE_MAKEFILES, name, VAR_GLOBAL); 2450 cleanup: 2451 bmake_free(fp); 2452 } 2453 2454 2455 /*- 2456 *--------------------------------------------------------------------- 2457 * Parse_setInput -- 2458 * Start Parsing from the given source 2459 * 2460 * Results: 2461 * None 2462 * 2463 * Side Effects: 2464 * A structure is added to the includes Lst and readProc, lineno, 2465 * fname and curFile are altered for the new file 2466 *--------------------------------------------------------------------- 2467 */ 2468 void 2469 Parse_SetInput(const char *name, int line, int fd, 2470 char *(*nextbuf)(void *, size_t *), void *arg) 2471 { 2472 char *buf; 2473 size_t len; 2474 2475 if (name == NULL) 2476 name = curFile->fname; 2477 else 2478 ParseTrackInput(name); 2479 2480 if (DEBUG(PARSE)) 2481 fprintf(debug_file, "%s: file %s, line %d, fd %d, nextbuf %p, arg %p\n", 2482 __func__, name, line, fd, nextbuf, arg); 2483 2484 if (fd == -1 && nextbuf == NULL) 2485 /* sanity */ 2486 return; 2487 2488 if (curFile != NULL) 2489 /* Save exiting file info */ 2490 Lst_AtFront(includes, curFile); 2491 2492 /* Allocate and fill in new structure */ 2493 curFile = bmake_malloc(sizeof *curFile); 2494 2495 /* 2496 * Once the previous state has been saved, we can get down to reading 2497 * the new file. We set up the name of the file to be the absolute 2498 * name of the include file so error messages refer to the right 2499 * place. 2500 */ 2501 curFile->fname = bmake_strdup(name); 2502 curFile->lineno = line; 2503 curFile->first_lineno = line; 2504 curFile->nextbuf = nextbuf; 2505 curFile->nextbuf_arg = arg; 2506 curFile->lf = NULL; 2507 curFile->depending = doing_depend; /* restore this on EOF */ 2508 2509 assert(nextbuf != NULL); 2510 2511 /* Get first block of input data */ 2512 buf = curFile->nextbuf(curFile->nextbuf_arg, &len); 2513 if (buf == NULL) { 2514 /* Was all a waste of time ... */ 2515 if (curFile->fname) 2516 free(curFile->fname); 2517 free(curFile); 2518 return; 2519 } 2520 curFile->P_str = buf; 2521 curFile->P_ptr = buf; 2522 curFile->P_end = buf+len; 2523 2524 curFile->cond_depth = Cond_save_depth(); 2525 ParseSetParseFile(name); 2526 } 2527 2528 /*- 2529 *----------------------------------------------------------------------- 2530 * IsInclude -- 2531 * Check if the line is an include directive 2532 * 2533 * Results: 2534 * TRUE if it is. 2535 * 2536 * Side Effects: 2537 * None 2538 * 2539 *----------------------------------------------------------------------- 2540 */ 2541 static Boolean 2542 IsInclude(const char *line, Boolean sysv) 2543 { 2544 static const char inc[] = "include"; 2545 static const size_t inclen = sizeof(inc) - 1; 2546 2547 // 'd' is not valid for sysv 2548 int o = strchr(&("ds-"[sysv]), *line) != NULL; 2549 2550 if (strncmp(line + o, inc, inclen) != 0) 2551 return FALSE; 2552 2553 // Space is not mandatory for BSD .include 2554 return !sysv || isspace((unsigned char)line[inclen + o]); 2555 } 2556 2557 2558 #ifdef SYSVINCLUDE 2559 /*- 2560 *----------------------------------------------------------------------- 2561 * IsSysVInclude -- 2562 * Check if the line is a SYSV include directive 2563 * 2564 * Results: 2565 * TRUE if it is. 2566 * 2567 * Side Effects: 2568 * None 2569 * 2570 *----------------------------------------------------------------------- 2571 */ 2572 static Boolean 2573 IsSysVInclude(const char *line) 2574 { 2575 const char *p; 2576 2577 if (!IsInclude(line, TRUE)) 2578 return FALSE; 2579 2580 /* Avoid interpeting a dependency line as an include */ 2581 for (p = line; (p = strchr(p, ':')) != NULL;) { 2582 if (*++p == '\0') { 2583 /* end of line -> dependency */ 2584 return FALSE; 2585 } 2586 if (*p == ':' || isspace((unsigned char)*p)) { 2587 /* :: operator or ': ' -> dependency */ 2588 return FALSE; 2589 } 2590 } 2591 return TRUE; 2592 } 2593 2594 /*- 2595 *--------------------------------------------------------------------- 2596 * ParseTraditionalInclude -- 2597 * Push to another file. 2598 * 2599 * The input is the current line. The file name(s) are 2600 * following the "include". 2601 * 2602 * Results: 2603 * None 2604 * 2605 * Side Effects: 2606 * A structure is added to the includes Lst and readProc, lineno, 2607 * fname and curFILE are altered for the new file 2608 *--------------------------------------------------------------------- 2609 */ 2610 static void 2611 ParseTraditionalInclude(char *line) 2612 { 2613 char *cp; /* current position in file spec */ 2614 int done = 0; 2615 int silent = line[0] != 'i'; 2616 char *file = &line[silent + 7]; 2617 char *all_files; 2618 2619 if (DEBUG(PARSE)) { 2620 fprintf(debug_file, "%s: %s\n", __func__, file); 2621 } 2622 2623 /* 2624 * Skip over whitespace 2625 */ 2626 while (isspace((unsigned char)*file)) 2627 file++; 2628 2629 /* 2630 * Substitute for any variables in the file name before trying to 2631 * find the thing. 2632 */ 2633 all_files = Var_Subst(file, VAR_CMD, VARE_WANTRES); 2634 2635 if (*file == '\0') { 2636 Parse_Error(PARSE_FATAL, 2637 "Filename missing from \"include\""); 2638 goto out; 2639 } 2640 2641 for (file = all_files; !done; file = cp + 1) { 2642 /* Skip to end of line or next whitespace */ 2643 for (cp = file; *cp && !isspace((unsigned char) *cp); cp++) 2644 continue; 2645 2646 if (*cp) 2647 *cp = '\0'; 2648 else 2649 done = 1; 2650 2651 Parse_include_file(file, FALSE, FALSE, silent); 2652 } 2653 out: 2654 free(all_files); 2655 } 2656 #endif 2657 2658 #ifdef GMAKEEXPORT 2659 /*- 2660 *--------------------------------------------------------------------- 2661 * ParseGmakeExport -- 2662 * Parse export <variable>=<value> 2663 * 2664 * And set the environment with it. 2665 * 2666 * Results: 2667 * None 2668 * 2669 * Side Effects: 2670 * None 2671 *--------------------------------------------------------------------- 2672 */ 2673 static void 2674 ParseGmakeExport(char *line) 2675 { 2676 char *variable = &line[6]; 2677 char *value; 2678 2679 if (DEBUG(PARSE)) { 2680 fprintf(debug_file, "%s: %s\n", __func__, variable); 2681 } 2682 2683 /* 2684 * Skip over whitespace 2685 */ 2686 while (isspace((unsigned char)*variable)) 2687 variable++; 2688 2689 for (value = variable; *value && *value != '='; value++) 2690 continue; 2691 2692 if (*value != '=') { 2693 Parse_Error(PARSE_FATAL, 2694 "Variable/Value missing from \"export\""); 2695 return; 2696 } 2697 *value++ = '\0'; /* terminate variable */ 2698 2699 /* 2700 * Expand the value before putting it in the environment. 2701 */ 2702 value = Var_Subst(value, VAR_CMD, VARE_WANTRES); 2703 setenv(variable, value, 1); 2704 free(value); 2705 } 2706 #endif 2707 2708 /*- 2709 *--------------------------------------------------------------------- 2710 * ParseEOF -- 2711 * Called when EOF is reached in the current file. If we were reading 2712 * an include file, the includes stack is popped and things set up 2713 * to go back to reading the previous file at the previous location. 2714 * 2715 * Results: 2716 * CONTINUE if there's more to do. DONE if not. 2717 * 2718 * Side Effects: 2719 * The old curFILE, is closed. The includes list is shortened. 2720 * lineno, curFILE, and fname are changed if CONTINUE is returned. 2721 *--------------------------------------------------------------------- 2722 */ 2723 static int 2724 ParseEOF(void) 2725 { 2726 char *ptr; 2727 size_t len; 2728 2729 assert(curFile->nextbuf != NULL); 2730 2731 doing_depend = curFile->depending; /* restore this */ 2732 /* get next input buffer, if any */ 2733 ptr = curFile->nextbuf(curFile->nextbuf_arg, &len); 2734 curFile->P_ptr = ptr; 2735 curFile->P_str = ptr; 2736 curFile->P_end = ptr + len; 2737 curFile->lineno = curFile->first_lineno; 2738 if (ptr != NULL) { 2739 /* Iterate again */ 2740 return CONTINUE; 2741 } 2742 2743 /* Ensure the makefile (or loop) didn't have mismatched conditionals */ 2744 Cond_restore_depth(curFile->cond_depth); 2745 2746 if (curFile->lf != NULL) { 2747 loadedfile_destroy(curFile->lf); 2748 curFile->lf = NULL; 2749 } 2750 2751 /* Dispose of curFile info */ 2752 /* Leak curFile->fname because all the gnodes have pointers to it */ 2753 free(curFile->P_str); 2754 free(curFile); 2755 2756 curFile = Lst_DeQueue(includes); 2757 2758 if (curFile == NULL) { 2759 /* We've run out of input */ 2760 Var_Delete(".PARSEDIR", VAR_GLOBAL); 2761 Var_Delete(".PARSEFILE", VAR_GLOBAL); 2762 Var_Delete(".INCLUDEDFROMDIR", VAR_GLOBAL); 2763 Var_Delete(".INCLUDEDFROMFILE", VAR_GLOBAL); 2764 return DONE; 2765 } 2766 2767 if (DEBUG(PARSE)) 2768 fprintf(debug_file, "ParseEOF: returning to file %s, line %d\n", 2769 curFile->fname, curFile->lineno); 2770 2771 /* Restore the PARSEDIR/PARSEFILE variables */ 2772 ParseSetParseFile(curFile->fname); 2773 return CONTINUE; 2774 } 2775 2776 #define PARSE_RAW 1 2777 #define PARSE_SKIP 2 2778 2779 static char * 2780 ParseGetLine(int flags, int *length) 2781 { 2782 IFile *cf = curFile; 2783 char *ptr; 2784 char ch; 2785 char *line; 2786 char *line_end; 2787 char *escaped; 2788 char *comment; 2789 char *tp; 2790 2791 /* Loop through blank lines and comment lines */ 2792 for (;;) { 2793 cf->lineno++; 2794 line = cf->P_ptr; 2795 ptr = line; 2796 line_end = line; 2797 escaped = NULL; 2798 comment = NULL; 2799 for (;;) { 2800 if (cf->P_end != NULL && ptr == cf->P_end) { 2801 /* end of buffer */ 2802 ch = 0; 2803 break; 2804 } 2805 ch = *ptr; 2806 if (ch == 0 || (ch == '\\' && ptr[1] == 0)) { 2807 if (cf->P_end == NULL) 2808 /* End of string (aka for loop) data */ 2809 break; 2810 /* see if there is more we can parse */ 2811 while (ptr++ < cf->P_end) { 2812 if ((ch = *ptr) == '\n') { 2813 if (ptr > line && ptr[-1] == '\\') 2814 continue; 2815 Parse_Error(PARSE_WARNING, 2816 "Zero byte read from file, skipping rest of line."); 2817 break; 2818 } 2819 } 2820 if (cf->nextbuf != NULL) { 2821 /* 2822 * End of this buffer; return EOF and outer logic 2823 * will get the next one. (eww) 2824 */ 2825 break; 2826 } 2827 Parse_Error(PARSE_FATAL, "Zero byte read from file"); 2828 return NULL; 2829 } 2830 2831 if (ch == '\\') { 2832 /* Don't treat next character as special, remember first one */ 2833 if (escaped == NULL) 2834 escaped = ptr; 2835 if (ptr[1] == '\n') 2836 cf->lineno++; 2837 ptr += 2; 2838 line_end = ptr; 2839 continue; 2840 } 2841 if (ch == '#' && comment == NULL) { 2842 /* Remember first '#' for comment stripping */ 2843 /* Unless previous char was '[', as in modifier :[#] */ 2844 if (!(ptr > line && ptr[-1] == '[')) 2845 comment = line_end; 2846 } 2847 ptr++; 2848 if (ch == '\n') 2849 break; 2850 if (!isspace((unsigned char)ch)) 2851 /* We are not interested in trailing whitespace */ 2852 line_end = ptr; 2853 } 2854 2855 /* Save next 'to be processed' location */ 2856 cf->P_ptr = ptr; 2857 2858 /* Check we have a non-comment, non-blank line */ 2859 if (line_end == line || comment == line) { 2860 if (ch == 0) 2861 /* At end of file */ 2862 return NULL; 2863 /* Parse another line */ 2864 continue; 2865 } 2866 2867 /* We now have a line of data */ 2868 *line_end = 0; 2869 2870 if (flags & PARSE_RAW) { 2871 /* Leave '\' (etc) in line buffer (eg 'for' lines) */ 2872 *length = line_end - line; 2873 return line; 2874 } 2875 2876 if (flags & PARSE_SKIP) { 2877 /* Completely ignore non-directives */ 2878 if (line[0] != '.') 2879 continue; 2880 /* We could do more of the .else/.elif/.endif checks here */ 2881 } 2882 break; 2883 } 2884 2885 /* Brutally ignore anything after a non-escaped '#' in non-commands */ 2886 if (comment != NULL && line[0] != '\t') { 2887 line_end = comment; 2888 *line_end = 0; 2889 } 2890 2891 /* If we didn't see a '\\' then the in-situ data is fine */ 2892 if (escaped == NULL) { 2893 *length = line_end - line; 2894 return line; 2895 } 2896 2897 /* Remove escapes from '\n' and '#' */ 2898 tp = ptr = escaped; 2899 escaped = line; 2900 for (; ; *tp++ = ch) { 2901 ch = *ptr++; 2902 if (ch != '\\') { 2903 if (ch == 0) 2904 break; 2905 continue; 2906 } 2907 2908 ch = *ptr++; 2909 if (ch == 0) { 2910 /* Delete '\\' at end of buffer */ 2911 tp--; 2912 break; 2913 } 2914 2915 if (ch == '#' && line[0] != '\t') 2916 /* Delete '\\' from before '#' on non-command lines */ 2917 continue; 2918 2919 if (ch != '\n') { 2920 /* Leave '\\' in buffer for later */ 2921 *tp++ = '\\'; 2922 /* Make sure we don't delete an escaped ' ' from the line end */ 2923 escaped = tp + 1; 2924 continue; 2925 } 2926 2927 /* Escaped '\n' replace following whitespace with a single ' ' */ 2928 while (ptr[0] == ' ' || ptr[0] == '\t') 2929 ptr++; 2930 ch = ' '; 2931 } 2932 2933 /* Delete any trailing spaces - eg from empty continuations */ 2934 while (tp > escaped && isspace((unsigned char)tp[-1])) 2935 tp--; 2936 2937 *tp = 0; 2938 *length = tp - line; 2939 return line; 2940 } 2941 2942 /*- 2943 *--------------------------------------------------------------------- 2944 * ParseReadLine -- 2945 * Read an entire line from the input file. Called only by Parse_File. 2946 * 2947 * Results: 2948 * A line w/o its newline 2949 * 2950 * Side Effects: 2951 * Only those associated with reading a character 2952 *--------------------------------------------------------------------- 2953 */ 2954 static char * 2955 ParseReadLine(void) 2956 { 2957 char *line; /* Result */ 2958 int lineLength; /* Length of result */ 2959 int lineno; /* Saved line # */ 2960 int rval; 2961 2962 for (;;) { 2963 line = ParseGetLine(0, &lineLength); 2964 if (line == NULL) 2965 return NULL; 2966 2967 if (line[0] != '.') 2968 return line; 2969 2970 /* 2971 * The line might be a conditional. Ask the conditional module 2972 * about it and act accordingly 2973 */ 2974 switch (Cond_Eval(line)) { 2975 case COND_SKIP: 2976 /* Skip to next conditional that evaluates to COND_PARSE. */ 2977 do { 2978 line = ParseGetLine(PARSE_SKIP, &lineLength); 2979 } while (line && Cond_Eval(line) != COND_PARSE); 2980 if (line == NULL) 2981 break; 2982 continue; 2983 case COND_PARSE: 2984 continue; 2985 case COND_INVALID: /* Not a conditional line */ 2986 /* Check for .for loops */ 2987 rval = For_Eval(line); 2988 if (rval == 0) 2989 /* Not a .for line */ 2990 break; 2991 if (rval < 0) 2992 /* Syntax error - error printed, ignore line */ 2993 continue; 2994 /* Start of a .for loop */ 2995 lineno = curFile->lineno; 2996 /* Accumulate loop lines until matching .endfor */ 2997 do { 2998 line = ParseGetLine(PARSE_RAW, &lineLength); 2999 if (line == NULL) { 3000 Parse_Error(PARSE_FATAL, 3001 "Unexpected end of file in for loop."); 3002 break; 3003 } 3004 } while (For_Accum(line)); 3005 /* Stash each iteration as a new 'input file' */ 3006 For_Run(lineno); 3007 /* Read next line from for-loop buffer */ 3008 continue; 3009 } 3010 return line; 3011 } 3012 } 3013 3014 /*- 3015 *----------------------------------------------------------------------- 3016 * ParseFinishLine -- 3017 * Handle the end of a dependency group. 3018 * 3019 * Results: 3020 * Nothing. 3021 * 3022 * Side Effects: 3023 * inLine set FALSE. 'targets' list destroyed. 3024 * 3025 *----------------------------------------------------------------------- 3026 */ 3027 static void 3028 ParseFinishLine(void) 3029 { 3030 if (inLine) { 3031 Lst_ForEach(targets, Suff_EndTransform, NULL); 3032 Lst_Destroy(targets, ParseHasCommands); 3033 targets = NULL; 3034 inLine = FALSE; 3035 } 3036 } 3037 3038 3039 /*- 3040 *--------------------------------------------------------------------- 3041 * Parse_File -- 3042 * Parse a file into its component parts, incorporating it into the 3043 * current dependency graph. This is the main function and controls 3044 * almost every other function in this module 3045 * 3046 * Input: 3047 * name the name of the file being read 3048 * fd Open file to makefile to parse 3049 * 3050 * Results: 3051 * None 3052 * 3053 * Side Effects: 3054 * closes fd. 3055 * Loads. Nodes are added to the list of all targets, nodes and links 3056 * are added to the dependency graph. etc. etc. etc. 3057 *--------------------------------------------------------------------- 3058 */ 3059 void 3060 Parse_File(const char *name, int fd) 3061 { 3062 char *cp; /* pointer into the line */ 3063 char *line; /* the line we're working on */ 3064 struct loadedfile *lf; 3065 3066 lf = loadfile(name, fd); 3067 3068 inLine = FALSE; 3069 fatals = 0; 3070 3071 if (name == NULL) 3072 name = "(stdin)"; 3073 3074 Parse_SetInput(name, 0, -1, loadedfile_nextbuf, lf); 3075 curFile->lf = lf; 3076 3077 do { 3078 for (; (line = ParseReadLine()) != NULL; ) { 3079 if (DEBUG(PARSE)) 3080 fprintf(debug_file, "ParseReadLine (%d): '%s'\n", 3081 curFile->lineno, line); 3082 if (*line == '.') { 3083 /* 3084 * Lines that begin with the special character may be 3085 * include or undef directives. 3086 * On the other hand they can be suffix rules (.c.o: ...) 3087 * or just dependencies for filenames that start '.'. 3088 */ 3089 for (cp = line + 1; isspace((unsigned char)*cp); cp++) { 3090 continue; 3091 } 3092 if (IsInclude(cp, FALSE)) { 3093 ParseDoInclude(cp); 3094 continue; 3095 } 3096 if (strncmp(cp, "undef", 5) == 0) { 3097 char *cp2; 3098 for (cp += 5; isspace((unsigned char) *cp); cp++) 3099 continue; 3100 for (cp2 = cp; !isspace((unsigned char) *cp2) && 3101 *cp2 != '\0'; cp2++) 3102 continue; 3103 *cp2 = '\0'; 3104 Var_Delete(cp, VAR_GLOBAL); 3105 continue; 3106 } else if (strncmp(cp, "export", 6) == 0) { 3107 for (cp += 6; isspace((unsigned char) *cp); cp++) 3108 continue; 3109 Var_Export(cp, 1); 3110 continue; 3111 } else if (strncmp(cp, "unexport", 8) == 0) { 3112 Var_UnExport(cp); 3113 continue; 3114 } else if (strncmp(cp, "info", 4) == 0 || 3115 strncmp(cp, "error", 5) == 0 || 3116 strncmp(cp, "warning", 7) == 0) { 3117 if (ParseMessage(cp)) 3118 continue; 3119 } 3120 } 3121 3122 if (*line == '\t') { 3123 /* 3124 * If a line starts with a tab, it can only hope to be 3125 * a creation command. 3126 */ 3127 cp = line + 1; 3128 shellCommand: 3129 for (; isspace ((unsigned char)*cp); cp++) { 3130 continue; 3131 } 3132 if (*cp) { 3133 if (!inLine) 3134 Parse_Error(PARSE_FATAL, 3135 "Unassociated shell command \"%s\"", 3136 cp); 3137 /* 3138 * So long as it's not a blank line and we're actually 3139 * in a dependency spec, add the command to the list of 3140 * commands of all targets in the dependency spec 3141 */ 3142 if (targets) { 3143 cp = bmake_strdup(cp); 3144 Lst_ForEach(targets, ParseAddCmd, cp); 3145 #ifdef CLEANUP 3146 Lst_AtEnd(targCmds, cp); 3147 #endif 3148 } 3149 } 3150 continue; 3151 } 3152 3153 #ifdef SYSVINCLUDE 3154 if (IsSysVInclude(line)) { 3155 /* 3156 * It's an S3/S5-style "include". 3157 */ 3158 ParseTraditionalInclude(line); 3159 continue; 3160 } 3161 #endif 3162 #ifdef GMAKEEXPORT 3163 if (strncmp(line, "export", 6) == 0 && 3164 isspace((unsigned char) line[6]) && 3165 strchr(line, ':') == NULL) { 3166 /* 3167 * It's a Gmake "export". 3168 */ 3169 ParseGmakeExport(line); 3170 continue; 3171 } 3172 #endif 3173 if (Parse_IsVar(line)) { 3174 ParseFinishLine(); 3175 Parse_DoVar(line, VAR_GLOBAL); 3176 continue; 3177 } 3178 3179 #ifndef POSIX 3180 /* 3181 * To make life easier on novices, if the line is indented we 3182 * first make sure the line has a dependency operator in it. 3183 * If it doesn't have an operator and we're in a dependency 3184 * line's script, we assume it's actually a shell command 3185 * and add it to the current list of targets. 3186 */ 3187 cp = line; 3188 if (isspace((unsigned char) line[0])) { 3189 while (isspace((unsigned char) *cp)) 3190 cp++; 3191 while (*cp && (ParseIsEscaped(line, cp) || 3192 *cp != ':' && *cp != '!')) { 3193 cp++; 3194 } 3195 if (*cp == '\0') { 3196 if (inLine) { 3197 Parse_Error(PARSE_WARNING, 3198 "Shell command needs a leading tab"); 3199 goto shellCommand; 3200 } 3201 } 3202 } 3203 #endif 3204 ParseFinishLine(); 3205 3206 /* 3207 * For some reason - probably to make the parser impossible - 3208 * a ';' can be used to separate commands from dependencies. 3209 * Attempt to avoid ';' inside substitution patterns. 3210 */ 3211 { 3212 int level = 0; 3213 3214 for (cp = line; *cp != 0; cp++) { 3215 if (*cp == '\\' && cp[1] != 0) { 3216 cp++; 3217 continue; 3218 } 3219 if (*cp == '$' && 3220 (cp[1] == '(' || cp[1] == '{')) { 3221 level++; 3222 continue; 3223 } 3224 if (level > 0) { 3225 if (*cp == ')' || *cp == '}') { 3226 level--; 3227 continue; 3228 } 3229 } else if (*cp == ';') { 3230 break; 3231 } 3232 } 3233 } 3234 if (*cp != 0) 3235 /* Terminate the dependency list at the ';' */ 3236 *cp++ = 0; 3237 else 3238 cp = NULL; 3239 3240 /* 3241 * We now know it's a dependency line so it needs to have all 3242 * variables expanded before being parsed. Tell the variable 3243 * module to complain if some variable is undefined... 3244 */ 3245 line = Var_Subst(line, VAR_CMD, VARE_UNDEFERR|VARE_WANTRES); 3246 3247 /* 3248 * Need a non-circular list for the target nodes 3249 */ 3250 if (targets) 3251 Lst_Destroy(targets, NULL); 3252 3253 targets = Lst_Init(FALSE); 3254 inLine = TRUE; 3255 3256 ParseDoDependency(line); 3257 free(line); 3258 3259 /* If there were commands after a ';', add them now */ 3260 if (cp != NULL) { 3261 goto shellCommand; 3262 } 3263 } 3264 /* 3265 * Reached EOF, but it may be just EOF of an include file... 3266 */ 3267 } while (ParseEOF() == CONTINUE); 3268 3269 if (fatals) { 3270 (void)fflush(stdout); 3271 (void)fprintf(stderr, 3272 "%s: Fatal errors encountered -- cannot continue", 3273 progname); 3274 PrintOnError(NULL, NULL); 3275 exit(1); 3276 } 3277 } 3278 3279 /*- 3280 *--------------------------------------------------------------------- 3281 * Parse_Init -- 3282 * initialize the parsing module 3283 * 3284 * Results: 3285 * none 3286 * 3287 * Side Effects: 3288 * the parseIncPath list is initialized... 3289 *--------------------------------------------------------------------- 3290 */ 3291 void 3292 Parse_Init(void) 3293 { 3294 mainNode = NULL; 3295 parseIncPath = Lst_Init(FALSE); 3296 sysIncPath = Lst_Init(FALSE); 3297 defIncPath = Lst_Init(FALSE); 3298 includes = Lst_Init(FALSE); 3299 #ifdef CLEANUP 3300 targCmds = Lst_Init(FALSE); 3301 #endif 3302 } 3303 3304 void 3305 Parse_End(void) 3306 { 3307 #ifdef CLEANUP 3308 Lst_Destroy(targCmds, (FreeProc *)free); 3309 if (targets) 3310 Lst_Destroy(targets, NULL); 3311 Lst_Destroy(defIncPath, Dir_Destroy); 3312 Lst_Destroy(sysIncPath, Dir_Destroy); 3313 Lst_Destroy(parseIncPath, Dir_Destroy); 3314 Lst_Destroy(includes, NULL); /* Should be empty now */ 3315 #endif 3316 } 3317 3318 3319 /*- 3320 *----------------------------------------------------------------------- 3321 * Parse_MainName -- 3322 * Return a Lst of the main target to create for main()'s sake. If 3323 * no such target exists, we Punt with an obnoxious error message. 3324 * 3325 * Results: 3326 * A Lst of the single node to create. 3327 * 3328 * Side Effects: 3329 * None. 3330 * 3331 *----------------------------------------------------------------------- 3332 */ 3333 Lst 3334 Parse_MainName(void) 3335 { 3336 Lst mainList; /* result list */ 3337 3338 mainList = Lst_Init(FALSE); 3339 3340 if (mainNode == NULL) { 3341 Punt("no target to make."); 3342 /*NOTREACHED*/ 3343 } else if (mainNode->type & OP_DOUBLEDEP) { 3344 (void)Lst_AtEnd(mainList, mainNode); 3345 Lst_Concat(mainList, mainNode->cohorts, LST_CONCNEW); 3346 } 3347 else 3348 (void)Lst_AtEnd(mainList, mainNode); 3349 Var_Append(".TARGETS", mainNode->name, VAR_GLOBAL); 3350 return mainList; 3351 } 3352 3353 /*- 3354 *----------------------------------------------------------------------- 3355 * ParseMark -- 3356 * Add the filename and lineno to the GNode so that we remember 3357 * where it was first defined. 3358 * 3359 * Side Effects: 3360 * None. 3361 * 3362 *----------------------------------------------------------------------- 3363 */ 3364 static void 3365 ParseMark(GNode *gn) 3366 { 3367 gn->fname = curFile->fname; 3368 gn->lineno = curFile->lineno; 3369 } 3370
Indexes created Sun Sep 21 20:09:37 GMT 2025