1 /* $NetBSD: parse.c,v 1.134 2007/05/23 19:03:56 dsl 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 1.134 2007/05/23 19:03:56 dsl 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 1.134 2007/05/23 19:03:56 dsl 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 <ctype.h> 127 #include <errno.h> 128 #include <fcntl.h> 129 #include <stdarg.h> 130 #include <stdio.h> 131 132 #include "make.h" 133 #include "hash.h" 134 #include "dir.h" 135 #include "job.h" 136 #include "buf.h" 137 #include "pathnames.h" 138 139 /* 140 * These values are returned by ParseEOF to tell Parse_File whether to 141 * CONTINUE parsing, i.e. it had only reached the end of an include file, 142 * or if it's DONE. 143 */ 144 #define CONTINUE 1 145 #define DONE 0 146 static Lst targets; /* targets we're working on */ 147 #ifdef CLEANUP 148 static Lst targCmds; /* command lines for targets */ 149 #endif 150 static Boolean inLine; /* true if currently in a dependency 151 * line or its commands */ 152 static int fatals = 0; 153 154 static GNode *mainNode; /* The main target to create. This is the 155 * first target on the first dependency 156 * line in the first makefile */ 157 typedef struct IFile { 158 const char *fname; /* name of file */ 159 int lineno; /* line number in file */ 160 int fd; /* the open file */ 161 int cond_depth; /* 'if' nesting when file opened */ 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 int P_buflen; /* current size of file buffer */ 166 } IFile; 167 168 #define IFILE_BUFLEN 0x8000 169 static IFile *curFile; 170 171 172 /* 173 * Definitions for handling #include specifications 174 */ 175 176 static Lst includes; /* stack of IFiles generated by .includes */ 177 Lst parseIncPath; /* list of directories for "..." includes */ 178 Lst sysIncPath; /* list of directories for <...> includes */ 179 Lst defIncPath; /* default directories for <...> includes */ 180 181 /*- 182 * specType contains the SPECial TYPE of the current target. It is 183 * Not if the target is unspecial. If it *is* special, however, the children 184 * are linked as children of the parent but not vice versa. This variable is 185 * set in ParseDoDependency 186 */ 187 typedef enum { 188 Begin, /* .BEGIN */ 189 Default, /* .DEFAULT */ 190 End, /* .END */ 191 Ignore, /* .IGNORE */ 192 Includes, /* .INCLUDES */ 193 Interrupt, /* .INTERRUPT */ 194 Libs, /* .LIBS */ 195 MFlags, /* .MFLAGS or .MAKEFLAGS */ 196 Main, /* .MAIN and we don't have anything user-specified to 197 * make */ 198 NoExport, /* .NOEXPORT */ 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 Suffixes, /* .SUFFIXES */ 216 Wait, /* .WAIT */ 217 Attribute /* Generic attribute */ 218 } ParseSpecial; 219 220 static ParseSpecial specType; 221 222 #define LPAREN '(' 223 #define RPAREN ')' 224 /* 225 * Predecessor node for handling .ORDER. Initialized to NILGNODE when .ORDER 226 * seen, then set to each successive source on the line. 227 */ 228 static GNode *predecessor; 229 230 /* 231 * The parseKeywords table is searched using binary search when deciding 232 * if a target or source is special. The 'spec' field is the ParseSpecial 233 * type of the keyword ("Not" if the keyword isn't special as a target) while 234 * the 'op' field is the operator to apply to the list of targets if the 235 * keyword is used as a source ("0" if the keyword isn't special as a source) 236 */ 237 static struct { 238 const char *name; /* Name of keyword */ 239 ParseSpecial spec; /* Type when used as a target */ 240 int op; /* Operator when used as a source */ 241 } parseKeywords[] = { 242 { ".BEGIN", Begin, 0 }, 243 { ".DEFAULT", Default, 0 }, 244 { ".END", End, 0 }, 245 { ".EXEC", Attribute, OP_EXEC }, 246 { ".IGNORE", Ignore, OP_IGNORE }, 247 { ".INCLUDES", Includes, 0 }, 248 { ".INTERRUPT", Interrupt, 0 }, 249 { ".INVISIBLE", Attribute, OP_INVISIBLE }, 250 { ".JOIN", Attribute, OP_JOIN }, 251 { ".LIBS", Libs, 0 }, 252 { ".MADE", Attribute, OP_MADE }, 253 { ".MAIN", Main, 0 }, 254 { ".MAKE", Attribute, OP_MAKE }, 255 { ".MAKEFLAGS", MFlags, 0 }, 256 { ".MFLAGS", MFlags, 0 }, 257 { ".NOPATH", NoPath, OP_NOPATH }, 258 { ".NOTMAIN", Attribute, OP_NOTMAIN }, 259 { ".NOTPARALLEL", NotParallel, 0 }, 260 { ".NO_PARALLEL", NotParallel, 0 }, 261 { ".NULL", Null, 0 }, 262 { ".OBJDIR", ExObjdir, 0 }, 263 { ".OPTIONAL", Attribute, OP_OPTIONAL }, 264 { ".ORDER", Order, 0 }, 265 { ".PARALLEL", Parallel, 0 }, 266 { ".PATH", ExPath, 0 }, 267 { ".PHONY", Phony, OP_PHONY }, 268 #ifdef POSIX 269 { ".POSIX", Posix, 0 }, 270 #endif 271 { ".PRECIOUS", Precious, OP_PRECIOUS }, 272 { ".RECURSIVE", Attribute, OP_MAKE }, 273 { ".SHELL", ExShell, 0 }, 274 { ".SILENT", Silent, OP_SILENT }, 275 { ".SINGLESHELL", SingleShell, 0 }, 276 { ".SUFFIXES", Suffixes, 0 }, 277 { ".USE", Attribute, OP_USE }, 278 { ".USEBEFORE", Attribute, OP_USEBEFORE }, 279 { ".WAIT", Wait, 0 }, 280 }; 281 282 static int ParseIsEscaped(const char *, const char *); 283 static void ParseErrorInternal(const char *, size_t, int, const char *, ...) 284 __attribute__((__format__(__printf__, 4, 5))); 285 static void ParseVErrorInternal(FILE *, const char *, size_t, int, const char *, va_list) 286 __attribute__((__format__(__printf__, 5, 0))); 287 static int ParseFindKeyword(const char *); 288 static int ParseLinkSrc(ClientData, ClientData); 289 static int ParseDoOp(ClientData, ClientData); 290 static void ParseDoSrc(int, const char *); 291 static int ParseFindMain(ClientData, ClientData); 292 static int ParseAddDir(ClientData, ClientData); 293 static int ParseClearPath(ClientData, ClientData); 294 static void ParseDoDependency(char *); 295 static int ParseAddCmd(ClientData, ClientData); 296 static void ParseHasCommands(ClientData); 297 static void ParseDoInclude(char *); 298 static void ParseSetParseFile(const char *); 299 #ifdef SYSVINCLUDE 300 static void ParseTraditionalInclude(char *); 301 #endif 302 static int ParseEOF(void); 303 static char *ParseReadLine(void); 304 static void ParseFinishLine(void); 305 static void ParseMark(GNode *); 306 307 extern int maxJobs; 308 309 310 /*- 311 *---------------------------------------------------------------------- 312 * ParseIsEscaped -- 313 * Check if the current character is escaped on the current line 314 * 315 * Results: 316 * 0 if the character is not backslash escaped, 1 otherwise 317 * 318 * Side Effects: 319 * None 320 *---------------------------------------------------------------------- 321 */ 322 static int 323 ParseIsEscaped(const char *line, const char *c) 324 { 325 int active = 0; 326 for (;;) { 327 if (line == c) 328 return active; 329 if (*--c != '\\') 330 return active; 331 active = !active; 332 } 333 } 334 335 /*- 336 *---------------------------------------------------------------------- 337 * ParseFindKeyword -- 338 * Look in the table of keywords for one matching the given string. 339 * 340 * Input: 341 * str String to find 342 * 343 * Results: 344 * The index of the keyword, or -1 if it isn't there. 345 * 346 * Side Effects: 347 * None 348 *---------------------------------------------------------------------- 349 */ 350 static int 351 ParseFindKeyword(const char *str) 352 { 353 int start, end, cur; 354 int diff; 355 356 start = 0; 357 end = (sizeof(parseKeywords)/sizeof(parseKeywords[0])) - 1; 358 359 do { 360 cur = start + ((end - start) / 2); 361 diff = strcmp(str, parseKeywords[cur].name); 362 363 if (diff == 0) { 364 return (cur); 365 } else if (diff < 0) { 366 end = cur - 1; 367 } else { 368 start = cur + 1; 369 } 370 } while (start <= end); 371 return (-1); 372 } 373 374 /*- 375 * ParseVErrorInternal -- 376 * Error message abort function for parsing. Prints out the context 377 * of the error (line number and file) as well as the message with 378 * two optional arguments. 379 * 380 * Results: 381 * None 382 * 383 * Side Effects: 384 * "fatals" is incremented if the level is PARSE_FATAL. 385 */ 386 /* VARARGS */ 387 static void 388 ParseVErrorInternal(FILE *f, const char *cfname, size_t clineno, int type, 389 const char *fmt, va_list ap) 390 { 391 static Boolean fatal_warning_error_printed = FALSE; 392 393 (void)fprintf(f, "%s: \"", progname); 394 395 if (*cfname != '/' && strcmp(cfname, "(stdin)") != 0) { 396 char *cp; 397 const char *dir; 398 399 /* 400 * Nothing is more anoying than not knowing which Makefile 401 * is the culprit. 402 */ 403 dir = Var_Value(".PARSEDIR", VAR_GLOBAL, &cp); 404 if (dir == NULL || *dir == '\0' || 405 (*dir == '.' && dir[1] == '\0')) 406 dir = Var_Value(".CURDIR", VAR_GLOBAL, &cp); 407 if (dir == NULL) 408 dir = "."; 409 410 (void)fprintf(f, "%s/%s", dir, cfname); 411 } else 412 (void)fprintf(f, "%s", cfname); 413 414 (void)fprintf(f, "\" line %d: ", (int)clineno); 415 if (type == PARSE_WARNING) 416 (void)fprintf(f, "warning: "); 417 (void)vfprintf(f, fmt, ap); 418 (void)fprintf(f, "\n"); 419 (void)fflush(f); 420 if (type == PARSE_FATAL || parseWarnFatal) 421 fatals += 1; 422 if (parseWarnFatal && !fatal_warning_error_printed) { 423 Error("parsing warnings being treated as errors"); 424 fatal_warning_error_printed = TRUE; 425 } 426 } 427 428 /*- 429 * ParseErrorInternal -- 430 * Error function 431 * 432 * Results: 433 * None 434 * 435 * Side Effects: 436 * None 437 */ 438 /* VARARGS */ 439 static void 440 ParseErrorInternal(const char *cfname, size_t clineno, int type, 441 const char *fmt, ...) 442 { 443 va_list ap; 444 445 va_start(ap, fmt); 446 ParseVErrorInternal(stderr, cfname, clineno, type, fmt, ap); 447 va_end(ap); 448 449 if (debug_file != stderr && debug_file != stdout) { 450 va_start(ap, fmt); 451 ParseVErrorInternal(debug_file, cfname, clineno, type, fmt, ap); 452 va_end(ap); 453 } 454 } 455 456 /*- 457 * Parse_Error -- 458 * External interface to ParseErrorInternal; uses the default filename 459 * Line number. 460 * 461 * Results: 462 * None 463 * 464 * Side Effects: 465 * None 466 */ 467 /* VARARGS */ 468 void 469 Parse_Error(int type, const char *fmt, ...) 470 { 471 va_list ap; 472 473 va_start(ap, fmt); 474 ParseVErrorInternal(stderr, curFile->fname, curFile->lineno, 475 type, fmt, ap); 476 va_end(ap); 477 478 if (debug_file != stderr && debug_file != stdout) { 479 va_start(ap, fmt); 480 ParseVErrorInternal(debug_file, curFile->fname, curFile->lineno, 481 type, fmt, ap); 482 va_end(ap); 483 } 484 } 485 486 /*- 487 *--------------------------------------------------------------------- 488 * ParseLinkSrc -- 489 * Link the parent node to its new child. Used in a Lst_ForEach by 490 * ParseDoDependency. If the specType isn't 'Not', the parent 491 * isn't linked as a parent of the child. 492 * 493 * Input: 494 * pgnp The parent node 495 * cgpn The child node 496 * 497 * Results: 498 * Always = 0 499 * 500 * Side Effects: 501 * New elements are added to the parents list of cgn and the 502 * children list of cgn. the unmade field of pgn is updated 503 * to reflect the additional child. 504 *--------------------------------------------------------------------- 505 */ 506 static int 507 ParseLinkSrc(ClientData pgnp, ClientData cgnp) 508 { 509 GNode *pgn = (GNode *)pgnp; 510 GNode *cgn = (GNode *)cgnp; 511 512 if ((pgn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (pgn->cohorts)) 513 pgn = (GNode *)Lst_Datum(Lst_Last(pgn->cohorts)); 514 (void)Lst_AtEnd(pgn->children, cgn); 515 if (specType == Not) 516 (void)Lst_AtEnd(cgn->parents, pgn); 517 pgn->unmade += 1; 518 if (DEBUG(PARSE)) { 519 fprintf(debug_file, "# ParseLinkSrc: added child %s - %s\n", pgn->name, cgn->name); 520 Targ_PrintNode(pgn, 0); 521 Targ_PrintNode(cgn, 0); 522 } 523 return (0); 524 } 525 526 /*- 527 *--------------------------------------------------------------------- 528 * ParseDoOp -- 529 * Apply the parsed operator to the given target node. Used in a 530 * Lst_ForEach call by ParseDoDependency once all targets have 531 * been found and their operator parsed. If the previous and new 532 * operators are incompatible, a major error is taken. 533 * 534 * Input: 535 * gnp The node to which the operator is to be applied 536 * opp The operator to apply 537 * 538 * Results: 539 * Always 0 540 * 541 * Side Effects: 542 * The type field of the node is altered to reflect any new bits in 543 * the op. 544 *--------------------------------------------------------------------- 545 */ 546 static int 547 ParseDoOp(ClientData gnp, ClientData opp) 548 { 549 GNode *gn = (GNode *)gnp; 550 int op = *(int *)opp; 551 /* 552 * If the dependency mask of the operator and the node don't match and 553 * the node has actually had an operator applied to it before, and 554 * the operator actually has some dependency information in it, complain. 555 */ 556 if (((op & OP_OPMASK) != (gn->type & OP_OPMASK)) && 557 !OP_NOP(gn->type) && !OP_NOP(op)) 558 { 559 Parse_Error(PARSE_FATAL, "Inconsistent operator for %s", gn->name); 560 return (1); 561 } 562 563 if ((op == OP_DOUBLEDEP) && ((gn->type & OP_OPMASK) == OP_DOUBLEDEP)) { 564 /* 565 * If the node was the object of a :: operator, we need to create a 566 * new instance of it for the children and commands on this dependency 567 * line. The new instance is placed on the 'cohorts' list of the 568 * initial one (note the initial one is not on its own cohorts list) 569 * and the new instance is linked to all parents of the initial 570 * instance. 571 */ 572 GNode *cohort; 573 574 /* 575 * Propagate copied bits to the initial node. They'll be propagated 576 * back to the rest of the cohorts later. 577 */ 578 gn->type |= op & ~OP_OPMASK; 579 580 cohort = Targ_FindNode(gn->name, TARG_NOHASH); 581 /* 582 * Make the cohort invisible as well to avoid duplicating it into 583 * other variables. True, parents of this target won't tend to do 584 * anything with their local variables, but better safe than 585 * sorry. (I think this is pointless now, since the relevant list 586 * traversals will no longer see this node anyway. -mycroft) 587 */ 588 cohort->type = op | OP_INVISIBLE; 589 (void)Lst_AtEnd(gn->cohorts, cohort); 590 cohort->centurion = gn; 591 gn->unmade_cohorts += 1; 592 snprintf(cohort->cohort_num, sizeof cohort->cohort_num, "#%d", 593 gn->unmade_cohorts); 594 } else { 595 /* 596 * We don't want to nuke any previous flags (whatever they were) so we 597 * just OR the new operator into the old 598 */ 599 gn->type |= op; 600 } 601 602 return (0); 603 } 604 605 /*- 606 *--------------------------------------------------------------------- 607 * ParseDoSrc -- 608 * Given the name of a source, figure out if it is an attribute 609 * and apply it to the targets if it is. Else decide if there is 610 * some attribute which should be applied *to* the source because 611 * of some special target and apply it if so. Otherwise, make the 612 * source be a child of the targets in the list 'targets' 613 * 614 * Input: 615 * tOp operator (if any) from special targets 616 * src name of the source to handle 617 * 618 * Results: 619 * None 620 * 621 * Side Effects: 622 * Operator bits may be added to the list of targets or to the source. 623 * The targets may have a new source added to their lists of children. 624 *--------------------------------------------------------------------- 625 */ 626 static void 627 ParseDoSrc(int tOp, const char *src) 628 { 629 GNode *gn = NULL; 630 static int wait_number = 0; 631 char wait_src[16]; 632 633 if (*src == '.' && isupper ((unsigned char)src[1])) { 634 int keywd = ParseFindKeyword(src); 635 if (keywd != -1) { 636 int op = parseKeywords[keywd].op; 637 if (op != 0) { 638 Lst_ForEach(targets, ParseDoOp, &op); 639 return; 640 } 641 if (parseKeywords[keywd].spec == Wait) { 642 /* 643 * We add a .WAIT node in the dependency list. 644 * After any dynamic dependencies (and filename globbing) 645 * have happened, it is given a dependency on the each 646 * previous child back to and previous .WAIT node. 647 * The next child won't be scheduled until the .WAIT node 648 * is built. 649 * We give each .WAIT node a unique name (mainly for diag). 650 */ 651 snprintf(wait_src, sizeof wait_src, ".WAIT_%u", ++wait_number); 652 gn = Targ_FindNode(wait_src, TARG_NOHASH); 653 gn->type = OP_WAIT | OP_PHONY | OP_DEPENDS | OP_NOTMAIN; 654 Lst_ForEach(targets, ParseLinkSrc, gn); 655 return; 656 } 657 } 658 } 659 660 switch (specType) { 661 case Main: 662 /* 663 * If we have noted the existence of a .MAIN, it means we need 664 * to add the sources of said target to the list of things 665 * to create. The string 'src' is likely to be free, so we 666 * must make a new copy of it. Note that this will only be 667 * invoked if the user didn't specify a target on the command 668 * line. This is to allow #ifmake's to succeed, or something... 669 */ 670 (void)Lst_AtEnd(create, estrdup(src)); 671 /* 672 * Add the name to the .TARGETS variable as well, so the user can 673 * employ that, if desired. 674 */ 675 Var_Append(".TARGETS", src, VAR_GLOBAL); 676 return; 677 678 case Order: 679 /* 680 * Create proper predecessor/successor links between the previous 681 * source and the current one. 682 */ 683 gn = Targ_FindNode(src, TARG_CREATE); 684 if (predecessor != NILGNODE) { 685 (void)Lst_AtEnd(predecessor->order_succ, gn); 686 (void)Lst_AtEnd(gn->order_pred, predecessor); 687 if (DEBUG(PARSE)) { 688 fprintf(debug_file, "# ParseDoSrc: added Order dependency %s - %s\n", 689 predecessor->name, gn->name); 690 Targ_PrintNode(predecessor, 0); 691 Targ_PrintNode(gn, 0); 692 } 693 } 694 /* 695 * The current source now becomes the predecessor for the next one. 696 */ 697 predecessor = gn; 698 break; 699 700 default: 701 /* 702 * If the source is not an attribute, we need to find/create 703 * a node for it. After that we can apply any operator to it 704 * from a special target or link it to its parents, as 705 * appropriate. 706 * 707 * In the case of a source that was the object of a :: operator, 708 * the attribute is applied to all of its instances (as kept in 709 * the 'cohorts' list of the node) or all the cohorts are linked 710 * to all the targets. 711 */ 712 713 /* Find/create the 'src' node and attach to all targets */ 714 gn = Targ_FindNode(src, TARG_CREATE); 715 if (tOp) { 716 gn->type |= tOp; 717 } else { 718 Lst_ForEach(targets, ParseLinkSrc, gn); 719 } 720 break; 721 } 722 } 723 724 /*- 725 *----------------------------------------------------------------------- 726 * ParseFindMain -- 727 * Find a real target in the list and set it to be the main one. 728 * Called by ParseDoDependency when a main target hasn't been found 729 * yet. 730 * 731 * Input: 732 * gnp Node to examine 733 * 734 * Results: 735 * 0 if main not found yet, 1 if it is. 736 * 737 * Side Effects: 738 * mainNode is changed and Targ_SetMain is called. 739 * 740 *----------------------------------------------------------------------- 741 */ 742 static int 743 ParseFindMain(ClientData gnp, ClientData dummy) 744 { 745 GNode *gn = (GNode *)gnp; 746 if ((gn->type & OP_NOTARGET) == 0) { 747 mainNode = gn; 748 Targ_SetMain(gn); 749 return (dummy ? 1 : 1); 750 } else { 751 return (dummy ? 0 : 0); 752 } 753 } 754 755 /*- 756 *----------------------------------------------------------------------- 757 * ParseAddDir -- 758 * Front-end for Dir_AddDir to make sure Lst_ForEach keeps going 759 * 760 * Results: 761 * === 0 762 * 763 * Side Effects: 764 * See Dir_AddDir. 765 * 766 *----------------------------------------------------------------------- 767 */ 768 static int 769 ParseAddDir(ClientData path, ClientData name) 770 { 771 (void)Dir_AddDir((Lst) path, (char *)name); 772 return(0); 773 } 774 775 /*- 776 *----------------------------------------------------------------------- 777 * ParseClearPath -- 778 * Front-end for Dir_ClearPath to make sure Lst_ForEach keeps going 779 * 780 * Results: 781 * === 0 782 * 783 * Side Effects: 784 * See Dir_ClearPath 785 * 786 *----------------------------------------------------------------------- 787 */ 788 static int 789 ParseClearPath(ClientData path, ClientData dummy) 790 { 791 Dir_ClearPath((Lst) path); 792 return(dummy ? 0 : 0); 793 } 794 795 /*- 796 *--------------------------------------------------------------------- 797 * ParseDoDependency -- 798 * Parse the dependency line in line. 799 * 800 * Input: 801 * line the line to parse 802 * 803 * Results: 804 * None 805 * 806 * Side Effects: 807 * The nodes of the sources are linked as children to the nodes of the 808 * targets. Some nodes may be created. 809 * 810 * We parse a dependency line by first extracting words from the line and 811 * finding nodes in the list of all targets with that name. This is done 812 * until a character is encountered which is an operator character. Currently 813 * these are only ! and :. At this point the operator is parsed and the 814 * pointer into the line advanced until the first source is encountered. 815 * The parsed operator is applied to each node in the 'targets' list, 816 * which is where the nodes found for the targets are kept, by means of 817 * the ParseDoOp function. 818 * The sources are read in much the same way as the targets were except 819 * that now they are expanded using the wildcarding scheme of the C-Shell 820 * and all instances of the resulting words in the list of all targets 821 * are found. Each of the resulting nodes is then linked to each of the 822 * targets as one of its children. 823 * Certain targets are handled specially. These are the ones detailed 824 * by the specType variable. 825 * The storing of transformation rules is also taken care of here. 826 * A target is recognized as a transformation rule by calling 827 * Suff_IsTransform. If it is a transformation rule, its node is gotten 828 * from the suffix module via Suff_AddTransform rather than the standard 829 * Targ_FindNode in the target module. 830 *--------------------------------------------------------------------- 831 */ 832 static void 833 ParseDoDependency(char *line) 834 { 835 char *cp; /* our current position */ 836 GNode *gn = NULL; /* a general purpose temporary node */ 837 int op; /* the operator on the line */ 838 char savec; /* a place to save a character */ 839 Lst paths; /* List of search paths to alter when parsing 840 * a list of .PATH targets */ 841 int tOp; /* operator from special target */ 842 Lst sources; /* list of archive source names after 843 * expansion */ 844 Lst curTargs; /* list of target names to be found and added 845 * to the targets list */ 846 char *lstart = line; 847 848 if (DEBUG(PARSE)) 849 fprintf(debug_file, "ParseDoDependency(%s)\n", line); 850 tOp = 0; 851 852 specType = Not; 853 paths = (Lst)NULL; 854 855 curTargs = Lst_Init(FALSE); 856 857 do { 858 for (cp = line; *cp && (ParseIsEscaped(lstart, cp) || 859 !(isspace((unsigned char)*cp) || 860 *cp == '!' || *cp == ':' || *cp == LPAREN)); 861 cp++) { 862 if (*cp == '$') { 863 /* 864 * Must be a dynamic source (would have been expanded 865 * otherwise), so call the Var module to parse the puppy 866 * so we can safely advance beyond it...There should be 867 * no errors in this, as they would have been discovered 868 * in the initial Var_Subst and we wouldn't be here. 869 */ 870 int length; 871 void *freeIt; 872 char *result; 873 874 result = Var_Parse(cp, VAR_CMD, TRUE, &length, &freeIt); 875 if (freeIt) 876 free(freeIt); 877 cp += length-1; 878 } 879 } 880 881 if (!ParseIsEscaped(lstart, cp) && *cp == LPAREN) { 882 /* 883 * Archives must be handled specially to make sure the OP_ARCHV 884 * flag is set in their 'type' field, for one thing, and because 885 * things like "archive(file1.o file2.o file3.o)" are permissible. 886 * Arch_ParseArchive will set 'line' to be the first non-blank 887 * after the archive-spec. It creates/finds nodes for the members 888 * and places them on the given list, returning SUCCESS if all 889 * went well and FAILURE if there was an error in the 890 * specification. On error, line should remain untouched. 891 */ 892 if (Arch_ParseArchive(&line, targets, VAR_CMD) != SUCCESS) { 893 Parse_Error(PARSE_FATAL, 894 "Error in archive specification: \"%s\"", line); 895 goto out; 896 } else { 897 continue; 898 } 899 } 900 savec = *cp; 901 902 if (!*cp) { 903 /* 904 * Ending a dependency line without an operator is a Bozo 905 * no-no. As a heuristic, this is also often triggered by 906 * undetected conflicts from cvs/rcs merges. 907 */ 908 if ((strncmp(line, "<<<<<<", 6) == 0) || 909 (strncmp(line, "======", 6) == 0) || 910 (strncmp(line, ">>>>>>", 6) == 0)) 911 Parse_Error(PARSE_FATAL, 912 "Makefile appears to contain unresolved cvs/rcs/??? merge conflicts"); 913 else 914 Parse_Error(PARSE_FATAL, "Need an operator"); 915 goto out; 916 } 917 *cp = '\0'; 918 919 /* 920 * Have a word in line. See if it's a special target and set 921 * specType to match it. 922 */ 923 if (*line == '.' && isupper ((unsigned char)line[1])) { 924 /* 925 * See if the target is a special target that must have it 926 * or its sources handled specially. 927 */ 928 int keywd = ParseFindKeyword(line); 929 if (keywd != -1) { 930 if (specType == ExPath && parseKeywords[keywd].spec != ExPath) { 931 Parse_Error(PARSE_FATAL, "Mismatched special targets"); 932 goto out; 933 } 934 935 specType = parseKeywords[keywd].spec; 936 tOp = parseKeywords[keywd].op; 937 938 /* 939 * Certain special targets have special semantics: 940 * .PATH Have to set the dirSearchPath 941 * variable too 942 * .MAIN Its sources are only used if 943 * nothing has been specified to 944 * create. 945 * .DEFAULT Need to create a node to hang 946 * commands on, but we don't want 947 * it in the graph, nor do we want 948 * it to be the Main Target, so we 949 * create it, set OP_NOTMAIN and 950 * add it to the list, setting 951 * DEFAULT to the new node for 952 * later use. We claim the node is 953 * A transformation rule to make 954 * life easier later, when we'll 955 * use Make_HandleUse to actually 956 * apply the .DEFAULT commands. 957 * .PHONY The list of targets 958 * .NOPATH Don't search for file in the path 959 * .BEGIN 960 * .END 961 * .INTERRUPT Are not to be considered the 962 * main target. 963 * .NOTPARALLEL Make only one target at a time. 964 * .SINGLESHELL Create a shell for each command. 965 * .ORDER Must set initial predecessor to NIL 966 */ 967 switch (specType) { 968 case ExPath: 969 if (paths == NULL) { 970 paths = Lst_Init(FALSE); 971 } 972 (void)Lst_AtEnd(paths, dirSearchPath); 973 break; 974 case Main: 975 if (!Lst_IsEmpty(create)) { 976 specType = Not; 977 } 978 break; 979 case Begin: 980 case End: 981 case Interrupt: 982 gn = Targ_FindNode(line, TARG_CREATE); 983 gn->type |= OP_NOTMAIN|OP_SPECIAL; 984 (void)Lst_AtEnd(targets, gn); 985 break; 986 case Default: 987 gn = Targ_NewGN(".DEFAULT"); 988 gn->type |= (OP_NOTMAIN|OP_TRANSFORM); 989 (void)Lst_AtEnd(targets, gn); 990 DEFAULT = gn; 991 break; 992 case NotParallel: 993 maxJobs = 1; 994 break; 995 case SingleShell: 996 compatMake = TRUE; 997 break; 998 case Order: 999 predecessor = NILGNODE; 1000 break; 1001 default: 1002 break; 1003 } 1004 } else if (strncmp(line, ".PATH", 5) == 0) { 1005 /* 1006 * .PATH<suffix> has to be handled specially. 1007 * Call on the suffix module to give us a path to 1008 * modify. 1009 */ 1010 Lst path; 1011 1012 specType = ExPath; 1013 path = Suff_GetPath(&line[5]); 1014 if (path == NILLST) { 1015 Parse_Error(PARSE_FATAL, 1016 "Suffix '%s' not defined (yet)", 1017 &line[5]); 1018 goto out; 1019 } else { 1020 if (paths == (Lst)NULL) { 1021 paths = Lst_Init(FALSE); 1022 } 1023 (void)Lst_AtEnd(paths, path); 1024 } 1025 } 1026 } 1027 1028 /* 1029 * Have word in line. Get or create its node and stick it at 1030 * the end of the targets list 1031 */ 1032 if ((specType == Not) && (*line != '\0')) { 1033 if (Dir_HasWildcards(line)) { 1034 /* 1035 * Targets are to be sought only in the current directory, 1036 * so create an empty path for the thing. Note we need to 1037 * use Dir_Destroy in the destruction of the path as the 1038 * Dir module could have added a directory to the path... 1039 */ 1040 Lst emptyPath = Lst_Init(FALSE); 1041 1042 Dir_Expand(line, emptyPath, curTargs); 1043 1044 Lst_Destroy(emptyPath, Dir_Destroy); 1045 } else { 1046 /* 1047 * No wildcards, but we want to avoid code duplication, 1048 * so create a list with the word on it. 1049 */ 1050 (void)Lst_AtEnd(curTargs, line); 1051 } 1052 1053 while(!Lst_IsEmpty(curTargs)) { 1054 char *targName = (char *)Lst_DeQueue(curTargs); 1055 1056 if (!Suff_IsTransform (targName)) { 1057 gn = Targ_FindNode(targName, TARG_CREATE); 1058 } else { 1059 gn = Suff_AddTransform(targName); 1060 } 1061 1062 (void)Lst_AtEnd(targets, gn); 1063 } 1064 } else if (specType == ExPath && *line != '.' && *line != '\0') { 1065 Parse_Error(PARSE_WARNING, "Extra target (%s) ignored", line); 1066 } 1067 1068 *cp = savec; 1069 /* 1070 * If it is a special type and not .PATH, it's the only target we 1071 * allow on this line... 1072 */ 1073 if (specType != Not && specType != ExPath) { 1074 Boolean warning = FALSE; 1075 1076 while (*cp && (ParseIsEscaped(lstart, cp) || 1077 ((*cp != '!') && (*cp != ':')))) { 1078 if (ParseIsEscaped(lstart, cp) || 1079 (*cp != ' ' && *cp != '\t')) { 1080 warning = TRUE; 1081 } 1082 cp++; 1083 } 1084 if (warning) { 1085 Parse_Error(PARSE_WARNING, "Extra target ignored"); 1086 } 1087 } else { 1088 while (*cp && isspace ((unsigned char)*cp)) { 1089 cp++; 1090 } 1091 } 1092 line = cp; 1093 } while (*line && (ParseIsEscaped(lstart, line) || 1094 ((*line != '!') && (*line != ':')))); 1095 1096 /* 1097 * Don't need the list of target names anymore... 1098 */ 1099 Lst_Destroy(curTargs, NOFREE); 1100 curTargs = NULL; 1101 1102 if (!Lst_IsEmpty(targets)) { 1103 switch(specType) { 1104 default: 1105 Parse_Error(PARSE_WARNING, "Special and mundane targets don't mix. Mundane ones ignored"); 1106 break; 1107 case Default: 1108 case Begin: 1109 case End: 1110 case Interrupt: 1111 /* 1112 * These four create nodes on which to hang commands, so 1113 * targets shouldn't be empty... 1114 */ 1115 case Not: 1116 /* 1117 * Nothing special here -- targets can be empty if it wants. 1118 */ 1119 break; 1120 } 1121 } 1122 1123 /* 1124 * Have now parsed all the target names. Must parse the operator next. The 1125 * result is left in op . 1126 */ 1127 if (*cp == '!') { 1128 op = OP_FORCE; 1129 } else if (*cp == ':') { 1130 if (cp[1] == ':') { 1131 op = OP_DOUBLEDEP; 1132 cp++; 1133 } else { 1134 op = OP_DEPENDS; 1135 } 1136 } else { 1137 Parse_Error(PARSE_FATAL, "Missing dependency operator"); 1138 goto out; 1139 } 1140 1141 cp++; /* Advance beyond operator */ 1142 1143 Lst_ForEach(targets, ParseDoOp, &op); 1144 1145 /* 1146 * Get to the first source 1147 */ 1148 while (*cp && isspace ((unsigned char)*cp)) { 1149 cp++; 1150 } 1151 line = cp; 1152 1153 /* 1154 * Several special targets take different actions if present with no 1155 * sources: 1156 * a .SUFFIXES line with no sources clears out all old suffixes 1157 * a .PRECIOUS line makes all targets precious 1158 * a .IGNORE line ignores errors for all targets 1159 * a .SILENT line creates silence when making all targets 1160 * a .PATH removes all directories from the search path(s). 1161 */ 1162 if (!*line) { 1163 switch (specType) { 1164 case Suffixes: 1165 Suff_ClearSuffixes(); 1166 break; 1167 case Precious: 1168 allPrecious = TRUE; 1169 break; 1170 case Ignore: 1171 ignoreErrors = TRUE; 1172 break; 1173 case Silent: 1174 beSilent = TRUE; 1175 break; 1176 case ExPath: 1177 Lst_ForEach(paths, ParseClearPath, NULL); 1178 Dir_SetPATH(); 1179 break; 1180 #ifdef POSIX 1181 case Posix: 1182 Var_Set("%POSIX", "1003.2", VAR_GLOBAL, 0); 1183 break; 1184 #endif 1185 default: 1186 break; 1187 } 1188 } else if (specType == MFlags) { 1189 /* 1190 * Call on functions in main.c to deal with these arguments and 1191 * set the initial character to a null-character so the loop to 1192 * get sources won't get anything 1193 */ 1194 Main_ParseArgLine(line); 1195 *line = '\0'; 1196 } else if (specType == ExShell) { 1197 if (Job_ParseShell(line) != SUCCESS) { 1198 Parse_Error(PARSE_FATAL, "improper shell specification"); 1199 goto out; 1200 } 1201 *line = '\0'; 1202 } else if ((specType == NotParallel) || (specType == SingleShell)) { 1203 *line = '\0'; 1204 } 1205 1206 /* 1207 * NOW GO FOR THE SOURCES 1208 */ 1209 if ((specType == Suffixes) || (specType == ExPath) || 1210 (specType == Includes) || (specType == Libs) || 1211 (specType == Null) || (specType == ExObjdir)) 1212 { 1213 while (*line) { 1214 /* 1215 * If the target was one that doesn't take files as its sources 1216 * but takes something like suffixes, we take each 1217 * space-separated word on the line as a something and deal 1218 * with it accordingly. 1219 * 1220 * If the target was .SUFFIXES, we take each source as a 1221 * suffix and add it to the list of suffixes maintained by the 1222 * Suff module. 1223 * 1224 * If the target was a .PATH, we add the source as a directory 1225 * to search on the search path. 1226 * 1227 * If it was .INCLUDES, the source is taken to be the suffix of 1228 * files which will be #included and whose search path should 1229 * be present in the .INCLUDES variable. 1230 * 1231 * If it was .LIBS, the source is taken to be the suffix of 1232 * files which are considered libraries and whose search path 1233 * should be present in the .LIBS variable. 1234 * 1235 * If it was .NULL, the source is the suffix to use when a file 1236 * has no valid suffix. 1237 * 1238 * If it was .OBJDIR, the source is a new definition for .OBJDIR, 1239 * and will cause make to do a new chdir to that path. 1240 */ 1241 while (*cp && !isspace ((unsigned char)*cp)) { 1242 cp++; 1243 } 1244 savec = *cp; 1245 *cp = '\0'; 1246 switch (specType) { 1247 case Suffixes: 1248 Suff_AddSuffix(line, &mainNode); 1249 break; 1250 case ExPath: 1251 Lst_ForEach(paths, ParseAddDir, line); 1252 break; 1253 case Includes: 1254 Suff_AddInclude(line); 1255 break; 1256 case Libs: 1257 Suff_AddLib(line); 1258 break; 1259 case Null: 1260 Suff_SetNull(line); 1261 break; 1262 case ExObjdir: 1263 Main_SetObjdir(line); 1264 break; 1265 default: 1266 break; 1267 } 1268 *cp = savec; 1269 if (savec != '\0') { 1270 cp++; 1271 } 1272 while (*cp && isspace ((unsigned char)*cp)) { 1273 cp++; 1274 } 1275 line = cp; 1276 } 1277 if (paths) { 1278 Lst_Destroy(paths, NOFREE); 1279 } 1280 if (specType == ExPath) 1281 Dir_SetPATH(); 1282 } else { 1283 while (*line) { 1284 /* 1285 * The targets take real sources, so we must beware of archive 1286 * specifications (i.e. things with left parentheses in them) 1287 * and handle them accordingly. 1288 */ 1289 for (; *cp && !isspace ((unsigned char)*cp); cp++) { 1290 if ((*cp == LPAREN) && (cp > line) && (cp[-1] != '$')) { 1291 /* 1292 * Only stop for a left parenthesis if it isn't at the 1293 * start of a word (that'll be for variable changes 1294 * later) and isn't preceded by a dollar sign (a dynamic 1295 * source). 1296 */ 1297 break; 1298 } 1299 } 1300 1301 if (*cp == LPAREN) { 1302 sources = Lst_Init(FALSE); 1303 if (Arch_ParseArchive(&line, sources, VAR_CMD) != SUCCESS) { 1304 Parse_Error(PARSE_FATAL, 1305 "Error in source archive spec \"%s\"", line); 1306 goto out; 1307 } 1308 1309 while (!Lst_IsEmpty (sources)) { 1310 gn = (GNode *)Lst_DeQueue(sources); 1311 ParseDoSrc(tOp, gn->name); 1312 } 1313 Lst_Destroy(sources, NOFREE); 1314 cp = line; 1315 } else { 1316 if (*cp) { 1317 *cp = '\0'; 1318 cp += 1; 1319 } 1320 1321 ParseDoSrc(tOp, line); 1322 } 1323 while (*cp && isspace ((unsigned char)*cp)) { 1324 cp++; 1325 } 1326 line = cp; 1327 } 1328 } 1329 1330 if (mainNode == NILGNODE) { 1331 /* 1332 * If we have yet to decide on a main target to make, in the 1333 * absence of any user input, we want the first target on 1334 * the first dependency line that is actually a real target 1335 * (i.e. isn't a .USE or .EXEC rule) to be made. 1336 */ 1337 Lst_ForEach(targets, ParseFindMain, NULL); 1338 } 1339 1340 out: 1341 if (curTargs) 1342 Lst_Destroy(curTargs, NOFREE); 1343 } 1344 1345 /*- 1346 *--------------------------------------------------------------------- 1347 * Parse_IsVar -- 1348 * Return TRUE if the passed line is a variable assignment. A variable 1349 * assignment consists of a single word followed by optional whitespace 1350 * followed by either a += or an = operator. 1351 * This function is used both by the Parse_File function and main when 1352 * parsing the command-line arguments. 1353 * 1354 * Input: 1355 * line the line to check 1356 * 1357 * Results: 1358 * TRUE if it is. FALSE if it ain't 1359 * 1360 * Side Effects: 1361 * none 1362 *--------------------------------------------------------------------- 1363 */ 1364 Boolean 1365 Parse_IsVar(char *line) 1366 { 1367 Boolean wasSpace = FALSE; /* set TRUE if found a space */ 1368 Boolean haveName = FALSE; /* Set TRUE if have a variable name */ 1369 int level = 0; 1370 #define ISEQOPERATOR(c) \ 1371 (((c) == '+') || ((c) == ':') || ((c) == '?') || ((c) == '!')) 1372 1373 /* 1374 * Skip to variable name 1375 */ 1376 for (;(*line == ' ') || (*line == '\t'); line++) 1377 continue; 1378 1379 for (; *line != '=' || level != 0; line++) 1380 switch (*line) { 1381 case '\0': 1382 /* 1383 * end-of-line -- can't be a variable assignment. 1384 */ 1385 return FALSE; 1386 1387 case ' ': 1388 case '\t': 1389 /* 1390 * there can be as much white space as desired so long as there is 1391 * only one word before the operator 1392 */ 1393 wasSpace = TRUE; 1394 break; 1395 1396 case LPAREN: 1397 case '{': 1398 level++; 1399 break; 1400 1401 case '}': 1402 case RPAREN: 1403 level--; 1404 break; 1405 1406 default: 1407 if (wasSpace && haveName) { 1408 if (ISEQOPERATOR(*line)) { 1409 /* 1410 * We must have a finished word 1411 */ 1412 if (level != 0) 1413 return FALSE; 1414 1415 /* 1416 * When an = operator [+?!:] is found, the next 1417 * character must be an = or it ain't a valid 1418 * assignment. 1419 */ 1420 if (line[1] == '=') 1421 return haveName; 1422 #ifdef SUNSHCMD 1423 /* 1424 * This is a shell command 1425 */ 1426 if (strncmp(line, ":sh", 3) == 0) 1427 return haveName; 1428 #endif 1429 } 1430 /* 1431 * This is the start of another word, so not assignment. 1432 */ 1433 return FALSE; 1434 } 1435 else { 1436 haveName = TRUE; 1437 wasSpace = FALSE; 1438 } 1439 break; 1440 } 1441 1442 return haveName; 1443 } 1444 1445 /*- 1446 *--------------------------------------------------------------------- 1447 * Parse_DoVar -- 1448 * Take the variable assignment in the passed line and do it in the 1449 * global context. 1450 * 1451 * Note: There is a lexical ambiguity with assignment modifier characters 1452 * in variable names. This routine interprets the character before the = 1453 * as a modifier. Therefore, an assignment like 1454 * C++=/usr/bin/CC 1455 * is interpreted as "C+ +=" instead of "C++ =". 1456 * 1457 * Input: 1458 * line a line guaranteed to be a variable assignment. 1459 * This reduces error checks 1460 * ctxt Context in which to do the assignment 1461 * 1462 * Results: 1463 * none 1464 * 1465 * Side Effects: 1466 * the variable structure of the given variable name is altered in the 1467 * global context. 1468 *--------------------------------------------------------------------- 1469 */ 1470 void 1471 Parse_DoVar(char *line, GNode *ctxt) 1472 { 1473 char *cp; /* pointer into line */ 1474 enum { 1475 VAR_SUBST, VAR_APPEND, VAR_SHELL, VAR_NORMAL 1476 } type; /* Type of assignment */ 1477 char *opc; /* ptr to operator character to 1478 * null-terminate the variable name */ 1479 Boolean freeCp = FALSE; /* TRUE if cp needs to be freed, 1480 * i.e. if any variable expansion was 1481 * performed */ 1482 1483 /* 1484 * Skip to variable name 1485 */ 1486 while ((*line == ' ') || (*line == '\t')) { 1487 line++; 1488 } 1489 1490 /* 1491 * Skip to operator character, nulling out whitespace as we go 1492 */ 1493 for (cp = line + 1; *cp != '='; cp++) { 1494 if (isspace ((unsigned char)*cp)) { 1495 *cp = '\0'; 1496 } 1497 } 1498 opc = cp-1; /* operator is the previous character */ 1499 *cp++ = '\0'; /* nuke the = */ 1500 1501 /* 1502 * Check operator type 1503 */ 1504 switch (*opc) { 1505 case '+': 1506 type = VAR_APPEND; 1507 *opc = '\0'; 1508 break; 1509 1510 case '?': 1511 /* 1512 * If the variable already has a value, we don't do anything. 1513 */ 1514 *opc = '\0'; 1515 if (Var_Exists(line, ctxt)) { 1516 return; 1517 } else { 1518 type = VAR_NORMAL; 1519 } 1520 break; 1521 1522 case ':': 1523 type = VAR_SUBST; 1524 *opc = '\0'; 1525 break; 1526 1527 case '!': 1528 type = VAR_SHELL; 1529 *opc = '\0'; 1530 break; 1531 1532 default: 1533 #ifdef SUNSHCMD 1534 while (opc > line && *opc != ':') 1535 opc--; 1536 1537 if (strncmp(opc, ":sh", 3) == 0) { 1538 type = VAR_SHELL; 1539 *opc = '\0'; 1540 break; 1541 } 1542 #endif 1543 type = VAR_NORMAL; 1544 break; 1545 } 1546 1547 while (isspace ((unsigned char)*cp)) { 1548 cp++; 1549 } 1550 1551 if (type == VAR_APPEND) { 1552 Var_Append(line, cp, ctxt); 1553 } else if (type == VAR_SUBST) { 1554 /* 1555 * Allow variables in the old value to be undefined, but leave their 1556 * invocation alone -- this is done by forcing oldVars to be false. 1557 * XXX: This can cause recursive variables, but that's not hard to do, 1558 * and this allows someone to do something like 1559 * 1560 * CFLAGS = $(.INCLUDES) 1561 * CFLAGS := -I.. $(CFLAGS) 1562 * 1563 * And not get an error. 1564 */ 1565 Boolean oldOldVars = oldVars; 1566 1567 oldVars = FALSE; 1568 1569 /* 1570 * make sure that we set the variable the first time to nothing 1571 * so that it gets substituted! 1572 */ 1573 if (!Var_Exists(line, ctxt)) 1574 Var_Set(line, "", ctxt, 0); 1575 1576 cp = Var_Subst(NULL, cp, ctxt, FALSE); 1577 oldVars = oldOldVars; 1578 freeCp = TRUE; 1579 1580 Var_Set(line, cp, ctxt, 0); 1581 } else if (type == VAR_SHELL) { 1582 char *res; 1583 const char *error; 1584 1585 if (strchr(cp, '$') != NULL) { 1586 /* 1587 * There's a dollar sign in the command, so perform variable 1588 * expansion on the whole thing. The resulting string will need 1589 * freeing when we're done, so set freeCmd to TRUE. 1590 */ 1591 cp = Var_Subst(NULL, cp, VAR_CMD, TRUE); 1592 freeCp = TRUE; 1593 } 1594 1595 res = Cmd_Exec(cp, &error); 1596 Var_Set(line, res, ctxt, 0); 1597 free(res); 1598 1599 if (error) 1600 Parse_Error(PARSE_WARNING, error, cp); 1601 } else { 1602 /* 1603 * Normal assignment -- just do it. 1604 */ 1605 Var_Set(line, cp, ctxt, 0); 1606 } 1607 if (strcmp(line, MAKEOVERRIDES) == 0) 1608 Main_ExportMAKEFLAGS(FALSE); /* re-export MAKEFLAGS */ 1609 else if (strcmp(line, ".CURDIR") == 0) { 1610 /* 1611 * Somone is being (too?) clever... 1612 * Let's pretend they know what they are doing and 1613 * re-initialize the 'cur' Path. 1614 */ 1615 Dir_InitCur(cp); 1616 Dir_SetPATH(); 1617 } 1618 if (freeCp) 1619 free(cp); 1620 } 1621 1622 1623 /*- 1624 * ParseAddCmd -- 1625 * Lst_ForEach function to add a command line to all targets 1626 * 1627 * Input: 1628 * gnp the node to which the command is to be added 1629 * cmd the command to add 1630 * 1631 * Results: 1632 * Always 0 1633 * 1634 * Side Effects: 1635 * A new element is added to the commands list of the node. 1636 */ 1637 static int 1638 ParseAddCmd(ClientData gnp, ClientData cmd) 1639 { 1640 GNode *gn = (GNode *)gnp; 1641 1642 /* Add to last (ie current) cohort for :: targets */ 1643 if ((gn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (gn->cohorts)) 1644 gn = (GNode *)Lst_Datum(Lst_Last(gn->cohorts)); 1645 1646 /* if target already supplied, ignore commands */ 1647 if (!(gn->type & OP_HAS_COMMANDS)) { 1648 (void)Lst_AtEnd(gn->commands, cmd); 1649 ParseMark(gn); 1650 } else { 1651 #ifdef notyet 1652 /* XXX: We cannot do this until we fix the tree */ 1653 (void)Lst_AtEnd(gn->commands, cmd); 1654 Parse_Error(PARSE_WARNING, 1655 "overriding commands for target \"%s\"; " 1656 "previous commands defined at %s: %d ignored", 1657 gn->name, gn->fname, gn->lineno); 1658 #else 1659 Parse_Error(PARSE_WARNING, 1660 "duplicate script for target \"%s\" ignored", 1661 gn->name); 1662 ParseErrorInternal(gn->fname, gn->lineno, PARSE_WARNING, 1663 "using previous script for \"%s\" defined here", 1664 gn->name); 1665 #endif 1666 } 1667 return(0); 1668 } 1669 1670 /*- 1671 *----------------------------------------------------------------------- 1672 * ParseHasCommands -- 1673 * Callback procedure for Parse_File when destroying the list of 1674 * targets on the last dependency line. Marks a target as already 1675 * having commands if it does, to keep from having shell commands 1676 * on multiple dependency lines. 1677 * 1678 * Input: 1679 * gnp Node to examine 1680 * 1681 * Results: 1682 * None 1683 * 1684 * Side Effects: 1685 * OP_HAS_COMMANDS may be set for the target. 1686 * 1687 *----------------------------------------------------------------------- 1688 */ 1689 static void 1690 ParseHasCommands(ClientData gnp) 1691 { 1692 GNode *gn = (GNode *)gnp; 1693 if (!Lst_IsEmpty(gn->commands)) { 1694 gn->type |= OP_HAS_COMMANDS; 1695 } 1696 } 1697 1698 /*- 1699 *----------------------------------------------------------------------- 1700 * Parse_AddIncludeDir -- 1701 * Add a directory to the path searched for included makefiles 1702 * bracketed by double-quotes. Used by functions in main.c 1703 * 1704 * Input: 1705 * dir The name of the directory to add 1706 * 1707 * Results: 1708 * None. 1709 * 1710 * Side Effects: 1711 * The directory is appended to the list. 1712 * 1713 *----------------------------------------------------------------------- 1714 */ 1715 void 1716 Parse_AddIncludeDir(char *dir) 1717 { 1718 (void)Dir_AddDir(parseIncPath, dir); 1719 } 1720 1721 /*- 1722 *--------------------------------------------------------------------- 1723 * ParseDoInclude -- 1724 * Push to another file. 1725 * 1726 * The input is the line minus the `.'. A file spec is a string 1727 * enclosed in <> or "". The former is looked for only in sysIncPath. 1728 * The latter in . and the directories specified by -I command line 1729 * options 1730 * 1731 * Results: 1732 * None 1733 * 1734 * Side Effects: 1735 * A structure is added to the includes Lst and readProc, lineno, 1736 * fname and curFILE are altered for the new file 1737 *--------------------------------------------------------------------- 1738 */ 1739 1740 static void 1741 Parse_include_file(char *file, Boolean isSystem, int silent) 1742 { 1743 char *fullname; /* full pathname of file */ 1744 int fd; 1745 1746 /* 1747 * Now we know the file's name and its search path, we attempt to 1748 * find the durn thing. A return of NULL indicates the file don't 1749 * exist. 1750 */ 1751 fullname = NULL; 1752 1753 if (!isSystem) { 1754 /* 1755 * Include files contained in double-quotes are first searched for 1756 * relative to the including file's location. We don't want to 1757 * cd there, of course, so we just tack on the old file's 1758 * leading path components and call Dir_FindFile to see if 1759 * we can locate the beast. 1760 */ 1761 char *prefEnd, *Fname; 1762 1763 /* Make a temporary copy of this, to be safe. */ 1764 Fname = estrdup(curFile->fname); 1765 1766 prefEnd = strrchr(Fname, '/'); 1767 if (prefEnd != NULL) { 1768 char *newName; 1769 1770 *prefEnd = '\0'; 1771 if (file[0] == '/') 1772 newName = estrdup(file); 1773 else 1774 newName = str_concat(Fname, file, STR_ADDSLASH); 1775 fullname = Dir_FindFile(newName, parseIncPath); 1776 if (fullname == NULL) { 1777 fullname = Dir_FindFile(newName, dirSearchPath); 1778 } 1779 free(newName); 1780 *prefEnd = '/'; 1781 } else { 1782 fullname = NULL; 1783 } 1784 free(Fname); 1785 if (fullname == NULL) { 1786 /* 1787 * Makefile wasn't found in same directory as included makefile. 1788 * Search for it first on the -I search path, 1789 * then on the .PATH search path, if not found in a -I directory. 1790 * XXX: Suffix specific? 1791 */ 1792 fullname = Dir_FindFile(file, parseIncPath); 1793 if (fullname == NULL) { 1794 fullname = Dir_FindFile(file, dirSearchPath); 1795 } 1796 } 1797 } 1798 1799 /* Looking for a system file or file still not found */ 1800 if (fullname == NULL) { 1801 /* 1802 * Look for it on the system path 1803 */ 1804 fullname = Dir_FindFile(file, 1805 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath); 1806 } 1807 1808 if (fullname == NULL) { 1809 if (!silent) 1810 Parse_Error(PARSE_FATAL, "Could not find %s", file); 1811 return; 1812 } 1813 1814 /* Actually open the file... */ 1815 fd = open(fullname, O_RDONLY); 1816 if (fd == -1) { 1817 if (!silent) 1818 Parse_Error(PARSE_FATAL, "Cannot open %s", fullname); 1819 return; 1820 } 1821 1822 /* Start reading from this file next */ 1823 Parse_SetInput(fullname, 0, fd, NULL); 1824 } 1825 1826 static void 1827 ParseDoInclude(char *line) 1828 { 1829 char endc; /* the character which ends the file spec */ 1830 char *cp; /* current position in file spec */ 1831 int silent = (*line != 'i') ? 1 : 0; 1832 char *file = &line[7 + silent]; 1833 1834 /* Skip to delimiter character so we know where to look */ 1835 while (*file == ' ' || *file == '\t') 1836 file++; 1837 1838 if (*file != '"' && *file != '<') { 1839 Parse_Error(PARSE_FATAL, 1840 ".include filename must be delimited by '\"' or '<'"); 1841 return; 1842 } 1843 1844 /* 1845 * Set the search path on which to find the include file based on the 1846 * characters which bracket its name. Angle-brackets imply it's 1847 * a system Makefile while double-quotes imply it's a user makefile 1848 */ 1849 if (*file == '<') { 1850 endc = '>'; 1851 } else { 1852 endc = '"'; 1853 } 1854 1855 /* Skip to matching delimiter */ 1856 for (cp = ++file; *cp && *cp != endc; cp++) 1857 continue; 1858 1859 if (*cp != endc) { 1860 Parse_Error(PARSE_FATAL, 1861 "Unclosed %cinclude filename. '%c' expected", 1862 '.', endc); 1863 return; 1864 } 1865 *cp = '\0'; 1866 1867 /* 1868 * Substitute for any variables in the file name before trying to 1869 * find the thing. 1870 */ 1871 file = Var_Subst(NULL, file, VAR_CMD, FALSE); 1872 1873 Parse_include_file(file, endc == '>', silent); 1874 free(file); 1875 } 1876 1877 1878 /*- 1879 *--------------------------------------------------------------------- 1880 * ParseSetParseFile -- 1881 * Set the .PARSEDIR and .PARSEFILE variables to the dirname and 1882 * basename of the given filename 1883 * 1884 * Results: 1885 * None 1886 * 1887 * Side Effects: 1888 * The .PARSEDIR and .PARSEFILE variables are overwritten by the 1889 * dirname and basename of the given filename. 1890 *--------------------------------------------------------------------- 1891 */ 1892 static void 1893 ParseSetParseFile(const char *filename) 1894 { 1895 char *slash; 1896 char *dirname; 1897 int len; 1898 1899 slash = strrchr(filename, '/'); 1900 if (slash == NULL) { 1901 Var_Set(".PARSEDIR", ".", VAR_GLOBAL, 0); 1902 Var_Set(".PARSEFILE", filename, VAR_GLOBAL, 0); 1903 } else { 1904 len = slash - filename; 1905 dirname = emalloc(len + 1); 1906 memcpy(dirname, filename, len); 1907 dirname[len] = 0; 1908 Var_Set(".PARSEDIR", dirname, VAR_GLOBAL, 0); 1909 Var_Set(".PARSEFILE", slash+1, VAR_GLOBAL, 0); 1910 free(dirname); 1911 } 1912 } 1913 1914 1915 /*- 1916 *--------------------------------------------------------------------- 1917 * Parse_setInput -- 1918 * Start Parsing from the given source 1919 * 1920 * Results: 1921 * None 1922 * 1923 * Side Effects: 1924 * A structure is added to the includes Lst and readProc, lineno, 1925 * fname and curFile are altered for the new file 1926 *--------------------------------------------------------------------- 1927 */ 1928 void 1929 Parse_SetInput(const char *name, int line, int fd, char *buf) 1930 { 1931 if (name == NULL) 1932 name = curFile->fname; 1933 1934 if (DEBUG(PARSE)) 1935 fprintf(debug_file, "Parse_SetInput: file %s, line %d, fd %d, buf %p\n", 1936 name, line, fd, buf); 1937 1938 if (fd == -1 && buf == NULL) 1939 /* sanity */ 1940 return; 1941 1942 if (curFile != NULL) 1943 /* Save exiting file info */ 1944 Lst_AtFront(includes, curFile); 1945 1946 /* Allocate and fill in new structure */ 1947 curFile = emalloc(sizeof *curFile); 1948 1949 /* 1950 * Once the previous state has been saved, we can get down to reading 1951 * the new file. We set up the name of the file to be the absolute 1952 * name of the include file so error messages refer to the right 1953 * place. 1954 */ 1955 curFile->fname = name; 1956 curFile->lineno = line; 1957 curFile->fd = fd; 1958 curFile->cond_depth = Cond_save_depth(); 1959 1960 ParseSetParseFile(name); 1961 1962 if (buf == NULL) { 1963 /* 1964 * Allocate a 32k data buffer (as stdio seems to). 1965 * Set pointers so that first ParseReadc has to do a file read. 1966 */ 1967 buf = emalloc(IFILE_BUFLEN); 1968 buf[0] = 0; 1969 curFile->P_str = buf; 1970 curFile->P_ptr = buf; 1971 curFile->P_end = buf; 1972 curFile->P_buflen = IFILE_BUFLEN; 1973 } else { 1974 /* Start reading from the start of the buffer */ 1975 curFile->P_str = buf; 1976 curFile->P_ptr = buf; 1977 curFile->P_end = NULL; 1978 } 1979 1980 } 1981 1982 #ifdef SYSVINCLUDE 1983 /*- 1984 *--------------------------------------------------------------------- 1985 * ParseTraditionalInclude -- 1986 * Push to another file. 1987 * 1988 * The input is the current line. The file name(s) are 1989 * following the "include". 1990 * 1991 * Results: 1992 * None 1993 * 1994 * Side Effects: 1995 * A structure is added to the includes Lst and readProc, lineno, 1996 * fname and curFILE are altered for the new file 1997 *--------------------------------------------------------------------- 1998 */ 1999 static void 2000 ParseTraditionalInclude(char *line) 2001 { 2002 char *cp; /* current position in file spec */ 2003 int done = 0; 2004 int silent = (line[0] != 'i') ? 1 : 0; 2005 char *file = &line[silent + 7]; 2006 char *all_files; 2007 2008 if (DEBUG(PARSE)) { 2009 fprintf(debug_file, "ParseTraditionalInclude: %s\n", file); 2010 } 2011 2012 /* 2013 * Skip over whitespace 2014 */ 2015 while (isspace((unsigned char)*file)) 2016 file++; 2017 2018 /* 2019 * Substitute for any variables in the file name before trying to 2020 * find the thing. 2021 */ 2022 all_files = Var_Subst(NULL, file, VAR_CMD, FALSE); 2023 2024 if (*file == '\0') { 2025 Parse_Error(PARSE_FATAL, 2026 "Filename missing from \"include\""); 2027 return; 2028 } 2029 2030 for (file = all_files; !done; file = cp + 1) { 2031 /* Skip to end of line or next whitespace */ 2032 for (cp = file; *cp && !isspace((unsigned char) *cp); cp++) 2033 continue; 2034 2035 if (*cp) 2036 *cp = '\0'; 2037 else 2038 done = 1; 2039 2040 Parse_include_file(file, FALSE, silent); 2041 } 2042 free(all_files); 2043 } 2044 #endif 2045 2046 /*- 2047 *--------------------------------------------------------------------- 2048 * ParseEOF -- 2049 * Called when EOF is reached in the current file. If we were reading 2050 * an include file, the includes stack is popped and things set up 2051 * to go back to reading the previous file at the previous location. 2052 * 2053 * Results: 2054 * CONTINUE if there's more to do. DONE if not. 2055 * 2056 * Side Effects: 2057 * The old curFILE, is closed. The includes list is shortened. 2058 * lineno, curFILE, and fname are changed if CONTINUE is returned. 2059 *--------------------------------------------------------------------- 2060 */ 2061 static int 2062 ParseEOF(void) 2063 { 2064 /* Ensure the makefile (or loop) didn't have mismatched conditionals */ 2065 Cond_restore_depth(curFile->cond_depth); 2066 2067 /* Dispose of curFile info */ 2068 /* Leak curFile->fname because all the gnodes have pointers to it */ 2069 if (curFile->fd != -1) 2070 close(curFile->fd); 2071 free(curFile->P_str); 2072 free(curFile); 2073 2074 curFile = Lst_DeQueue(includes); 2075 2076 if (curFile == (IFile *)NIL) { 2077 /* We've run out of input */ 2078 Var_Delete(".PARSEDIR", VAR_GLOBAL); 2079 Var_Delete(".PARSEFILE", VAR_GLOBAL); 2080 return DONE; 2081 } 2082 2083 if (DEBUG(PARSE)) 2084 fprintf(debug_file, "ParseEOF: returning to file %s, line %d, fd %d\n", 2085 curFile->fname, curFile->lineno, curFile->fd); 2086 2087 /* Restore the PARSEDIR/PARSEFILE variables */ 2088 ParseSetParseFile(curFile->fname); 2089 return (CONTINUE); 2090 } 2091 2092 #define PARSE_RAW 1 2093 #define PARSE_SKIP 2 2094 2095 static char * 2096 ParseGetLine(int flags, int *length) 2097 { 2098 IFile *cf = curFile; 2099 char *ptr; 2100 char ch; 2101 char *line; 2102 char *line_end; 2103 char *escaped; 2104 char *comment; 2105 char *tp; 2106 int len, dist; 2107 2108 /* Loop through blank lines and comment lines */ 2109 for (;;) { 2110 cf->lineno++; 2111 line = cf->P_ptr; 2112 ptr = line; 2113 line_end = line; 2114 escaped = NULL; 2115 comment = NULL; 2116 for (;;) { 2117 ch = *ptr; 2118 if (ch == 0 || (ch == '\\' && ptr[1] == 0)) { 2119 if (cf->P_end == NULL) 2120 /* End of string (aka for loop) data */ 2121 break; 2122 /* End of data read from file, read more data */ 2123 if (ptr != cf->P_end && (ch != '\\' || ptr + 1 != cf->P_end)) { 2124 Parse_Error(PARSE_FATAL, "Zero byte read from file"); 2125 return NULL; 2126 } 2127 /* Move existing data to (near) start of file buffer */ 2128 len = cf->P_end - cf->P_ptr; 2129 tp = cf->P_str + 32; 2130 memmove(tp, cf->P_ptr, len); 2131 dist = cf->P_ptr - tp; 2132 /* Update all pointers to reflect moved data */ 2133 ptr -= dist; 2134 line -= dist; 2135 line_end -= dist; 2136 if (escaped) 2137 escaped -= dist; 2138 if (comment) 2139 comment -= dist; 2140 cf->P_ptr = tp; 2141 tp += len; 2142 cf->P_end = tp; 2143 /* Try to read more data from file into buffer space */ 2144 len = cf->P_str + cf->P_buflen - tp - 32; 2145 if (len <= 0) { 2146 /* We need a bigger buffer to hold this line */ 2147 tp = erealloc(cf->P_str, cf->P_buflen + IFILE_BUFLEN); 2148 cf->P_end = cf->P_end - cf->P_str + tp; 2149 ptr = ptr - cf->P_str + tp; 2150 line = line - cf->P_str + tp; 2151 line_end = line_end - cf->P_str + tp; 2152 if (escaped) 2153 escaped = escaped - cf->P_str + tp; 2154 if (comment) 2155 comment = comment - cf->P_str + tp; 2156 cf->P_str = tp; 2157 tp = cf->P_end; 2158 len += IFILE_BUFLEN; 2159 } 2160 len = read(cf->fd, tp, len); 2161 if (len <= 0) { 2162 if (len < 0) { 2163 Parse_Error(PARSE_FATAL, "Makefile read error: %s", 2164 strerror(errno)); 2165 return NULL; 2166 } 2167 /* End of file */ 2168 break; 2169 } 2170 /* 0 terminate the data, and update end pointer */ 2171 tp += len; 2172 cf->P_end = tp; 2173 *tp = 0; 2174 /* Process newly read characters */ 2175 continue; 2176 } 2177 2178 if (ch == '\\') { 2179 /* Don't treat next character as special, remember first one */ 2180 if (escaped == NULL) 2181 escaped = ptr; 2182 if (ptr[1] == '\n') 2183 cf->lineno++; 2184 ptr += 2; 2185 line_end = ptr; 2186 continue; 2187 } 2188 if (ch == '#' && comment == NULL) { 2189 /* Remember first '#' for comment stripping */ 2190 comment = line_end; 2191 } 2192 ptr++; 2193 if (ch == '\n') 2194 break; 2195 if (!isspace((unsigned char)ch)) 2196 /* We are not interested in trailing whitespace */ 2197 line_end = ptr; 2198 } 2199 2200 /* Save next 'to be processed' location */ 2201 cf->P_ptr = ptr; 2202 2203 /* Check we have a non-comment, non-blank line */ 2204 if (line_end == line || comment == line) { 2205 if (ch == 0) 2206 /* At end of file */ 2207 return NULL; 2208 /* Parse another line */ 2209 continue; 2210 } 2211 2212 /* We now have a line of data */ 2213 *line_end = 0; 2214 2215 if (flags & PARSE_RAW) { 2216 /* Leave '\' (etc) in line buffer (eg 'for' lines) */ 2217 *length = line_end - line; 2218 return line; 2219 } 2220 2221 if (flags & PARSE_SKIP) { 2222 /* Completely ignore non-directives */ 2223 if (line[0] != '.') 2224 continue; 2225 /* We could do more of the .else/.elif/.endif checks here */ 2226 } 2227 break; 2228 } 2229 2230 /* Brutally ignore anything after a non-escaped '#' in non-commands */ 2231 if (comment != NULL && line[0] != '\t') { 2232 line_end = comment; 2233 *line_end = 0; 2234 } 2235 2236 /* If we didn't see a '\\' then the in-situ data is fine */ 2237 if (escaped == NULL) { 2238 *length = line_end - line; 2239 return line; 2240 } 2241 2242 /* Remove escapes from '\n' and '#' */ 2243 tp = ptr = escaped; 2244 escaped = line; 2245 for (; ; *tp++ = ch) { 2246 ch = *ptr++; 2247 if (ch != '\\') { 2248 if (ch == 0) 2249 break; 2250 continue; 2251 } 2252 2253 ch = *ptr++; 2254 if (ch == 0) { 2255 /* Delete '\\' at end of buffer */ 2256 tp--; 2257 break; 2258 } 2259 2260 if (ch == '#' && line[0] != '\t') 2261 /* Delete '\\' from before '#' on non-command lines */ 2262 continue; 2263 2264 if (ch != '\n') { 2265 /* Leave '\\' in buffer for later */ 2266 *tp++ = '\\'; 2267 /* Make sure we don't delete an escaped ' ' from the line end */ 2268 escaped = tp + 1; 2269 continue; 2270 } 2271 2272 /* Escaped '\n' replace following whitespace with a single ' ' */ 2273 while (ptr[0] == ' ' || ptr[0] == '\t') 2274 ptr++; 2275 ch = ' '; 2276 } 2277 2278 /* Delete any trailing spaces - eg from empty continuations */ 2279 while (tp > escaped && isspace((unsigned char)tp[-1])) 2280 tp--; 2281 2282 *tp = 0; 2283 *length = tp - line; 2284 return line; 2285 } 2286 2287 /*- 2288 *--------------------------------------------------------------------- 2289 * ParseReadLine -- 2290 * Read an entire line from the input file. Called only by Parse_File. 2291 * 2292 * Results: 2293 * A line w/o its newline 2294 * 2295 * Side Effects: 2296 * Only those associated with reading a character 2297 *--------------------------------------------------------------------- 2298 */ 2299 static char * 2300 ParseReadLine(void) 2301 { 2302 char *line; /* Result */ 2303 int lineLength; /* Length of result */ 2304 int lineno; /* Saved line # */ 2305 2306 for (;;) { 2307 line = ParseGetLine(0, &lineLength); 2308 if (line == NULL) 2309 return NULL; 2310 2311 if (line[0] != '.') 2312 return line; 2313 2314 /* 2315 * The line might be a conditional. Ask the conditional module 2316 * about it and act accordingly 2317 */ 2318 switch (Cond_Eval(line)) { 2319 case COND_SKIP: 2320 /* Skip to next conditional that evaluates to COND_PARSE. */ 2321 do { 2322 line = ParseGetLine(PARSE_SKIP, &lineLength); 2323 } while (line && Cond_Eval(line) != COND_PARSE); 2324 if (line == NULL) 2325 break; 2326 continue; 2327 case COND_PARSE: 2328 continue; 2329 case COND_INVALID: /* Not a conditional line */ 2330 if (!For_Eval(line)) 2331 break; 2332 lineno = curFile->lineno; 2333 /* Skip after the matching end */ 2334 do { 2335 line = ParseGetLine(PARSE_RAW, &lineLength); 2336 if (line == NULL) { 2337 Parse_Error(PARSE_FATAL, 2338 "Unexpected end of file in for loop.\n"); 2339 break; 2340 } 2341 } while (For_Eval(line)); 2342 /* Stash each iteration as a new 'input file' */ 2343 For_Run(lineno); 2344 /* Read next line from for-loop buffer */ 2345 continue; 2346 } 2347 return (line); 2348 } 2349 } 2350 2351 /*- 2352 *----------------------------------------------------------------------- 2353 * ParseFinishLine -- 2354 * Handle the end of a dependency group. 2355 * 2356 * Results: 2357 * Nothing. 2358 * 2359 * Side Effects: 2360 * inLine set FALSE. 'targets' list destroyed. 2361 * 2362 *----------------------------------------------------------------------- 2363 */ 2364 static void 2365 ParseFinishLine(void) 2366 { 2367 if (inLine) { 2368 Lst_ForEach(targets, Suff_EndTransform, NULL); 2369 Lst_Destroy(targets, ParseHasCommands); 2370 targets = NULL; 2371 inLine = FALSE; 2372 } 2373 } 2374 2375 2376 /*- 2377 *--------------------------------------------------------------------- 2378 * Parse_File -- 2379 * Parse a file into its component parts, incorporating it into the 2380 * current dependency graph. This is the main function and controls 2381 * almost every other function in this module 2382 * 2383 * Input: 2384 * name the name of the file being read 2385 * fd Open file to makefile to parse 2386 * 2387 * Results: 2388 * None 2389 * 2390 * Side Effects: 2391 * closes fd. 2392 * Loads. Nodes are added to the list of all targets, nodes and links 2393 * are added to the dependency graph. etc. etc. etc. 2394 *--------------------------------------------------------------------- 2395 */ 2396 void 2397 Parse_File(const char *name, int fd) 2398 { 2399 char *cp; /* pointer into the line */ 2400 char *line; /* the line we're working on */ 2401 2402 inLine = FALSE; 2403 fatals = 0; 2404 2405 Parse_SetInput(name, 0, fd, NULL); 2406 2407 do { 2408 for (; (line = ParseReadLine()) != NULL; ) { 2409 if (DEBUG(PARSE)) 2410 fprintf(debug_file, "ParseReadLine (%d): '%s'\n", 2411 curFile->lineno, line); 2412 if (*line == '.') { 2413 /* 2414 * Lines that begin with the special character are either 2415 * include or undef directives. 2416 */ 2417 for (cp = line + 1; isspace((unsigned char)*cp); cp++) { 2418 continue; 2419 } 2420 if (strncmp(cp, "include", 7) == 0 || 2421 ((cp[0] == 's' || cp[0] == '-') && 2422 strncmp(&cp[1], "include", 7) == 0)) { 2423 ParseDoInclude(cp); 2424 continue; 2425 } 2426 if (strncmp(cp, "undef", 5) == 0) { 2427 char *cp2; 2428 for (cp += 5; isspace((unsigned char) *cp); cp++) 2429 continue; 2430 for (cp2 = cp; !isspace((unsigned char) *cp2) && 2431 (*cp2 != '\0'); cp2++) 2432 continue; 2433 *cp2 = '\0'; 2434 Var_Delete(cp, VAR_GLOBAL); 2435 continue; 2436 } 2437 } 2438 2439 if (*line == '\t') { 2440 /* 2441 * If a line starts with a tab, it can only hope to be 2442 * a creation command. 2443 */ 2444 cp = line + 1; 2445 shellCommand: 2446 for (; isspace ((unsigned char)*cp); cp++) { 2447 continue; 2448 } 2449 if (*cp) { 2450 if (!inLine) 2451 Parse_Error(PARSE_FATAL, 2452 "Unassociated shell command \"%s\"", 2453 cp); 2454 /* 2455 * So long as it's not a blank line and we're actually 2456 * in a dependency spec, add the command to the list of 2457 * commands of all targets in the dependency spec 2458 */ 2459 if (targets) { 2460 cp = estrdup(cp); 2461 Lst_ForEach(targets, ParseAddCmd, cp); 2462 #ifdef CLEANUP 2463 Lst_AtEnd(targCmds, cp); 2464 #endif 2465 } 2466 } 2467 continue; 2468 } 2469 2470 #ifdef SYSVINCLUDE 2471 if (((strncmp(line, "include", 7) == 0 && 2472 isspace((unsigned char) line[7])) || 2473 ((line[0] == 's' || line[0] == '-') && 2474 strncmp(&line[1], "include", 7) == 0 && 2475 isspace((unsigned char) line[8]))) && 2476 strchr(line, ':') == NULL) { 2477 /* 2478 * It's an S3/S5-style "include". 2479 */ 2480 ParseTraditionalInclude(line); 2481 continue; 2482 } 2483 #endif 2484 if (Parse_IsVar(line)) { 2485 ParseFinishLine(); 2486 Parse_DoVar(line, VAR_GLOBAL); 2487 continue; 2488 } 2489 2490 #ifndef POSIX 2491 /* 2492 * To make life easier on novices, if the line is indented we 2493 * first make sure the line has a dependency operator in it. 2494 * If it doesn't have an operator and we're in a dependency 2495 * line's script, we assume it's actually a shell command 2496 * and add it to the current list of targets. 2497 */ 2498 cp = line; 2499 if (isspace((unsigned char) line[0])) { 2500 while ((*cp != '\0') && isspace((unsigned char) *cp)) 2501 cp++; 2502 while (*cp && (ParseIsEscaped(line, cp) || 2503 (*cp != ':') && (*cp != '!'))) { 2504 cp++; 2505 } 2506 if (*cp == '\0') { 2507 if (inLine) { 2508 Parse_Error(PARSE_WARNING, 2509 "Shell command needs a leading tab"); 2510 goto shellCommand; 2511 } 2512 } 2513 } 2514 #endif 2515 ParseFinishLine(); 2516 2517 /* 2518 * For some reason - probably to make the parser impossible - 2519 * a ';' can be used to separate commands from dependencies. 2520 * No attempt is made to avoid ';' inside substitution patterns. 2521 */ 2522 for (cp = line; *cp != 0; cp++) { 2523 if (*cp == '\\' && cp[1] != 0) { 2524 cp++; 2525 continue; 2526 } 2527 if (*cp == ';') 2528 break; 2529 } 2530 if (*cp != 0) 2531 /* Terminate the dependency list at the ';' */ 2532 *cp++ = 0; 2533 else 2534 cp = NULL; 2535 2536 /* 2537 * We now know it's a dependency line so it needs to have all 2538 * variables expanded before being parsed. Tell the variable 2539 * module to complain if some variable is undefined... 2540 */ 2541 line = Var_Subst(NULL, line, VAR_CMD, TRUE); 2542 2543 /* 2544 * Need a non-circular list for the target nodes 2545 */ 2546 if (targets) 2547 Lst_Destroy(targets, NOFREE); 2548 2549 targets = Lst_Init(FALSE); 2550 inLine = TRUE; 2551 2552 ParseDoDependency(line); 2553 free(line); 2554 2555 /* If there were commands after a ';', add them now */ 2556 if (cp != NULL) { 2557 goto shellCommand; 2558 } 2559 } 2560 /* 2561 * Reached EOF, but it may be just EOF of an include file... 2562 */ 2563 } while (ParseEOF() == CONTINUE); 2564 2565 if (fatals) { 2566 (void)fprintf(stderr, 2567 "%s: Fatal errors encountered -- cannot continue\n", 2568 progname); 2569 PrintOnError(NULL); 2570 exit(1); 2571 } 2572 } 2573 2574 /*- 2575 *--------------------------------------------------------------------- 2576 * Parse_Init -- 2577 * initialize the parsing module 2578 * 2579 * Results: 2580 * none 2581 * 2582 * Side Effects: 2583 * the parseIncPath list is initialized... 2584 *--------------------------------------------------------------------- 2585 */ 2586 void 2587 Parse_Init(void) 2588 { 2589 mainNode = NILGNODE; 2590 parseIncPath = Lst_Init(FALSE); 2591 sysIncPath = Lst_Init(FALSE); 2592 defIncPath = Lst_Init(FALSE); 2593 includes = Lst_Init(FALSE); 2594 #ifdef CLEANUP 2595 targCmds = Lst_Init(FALSE); 2596 #endif 2597 } 2598 2599 void 2600 Parse_End(void) 2601 { 2602 #ifdef CLEANUP 2603 Lst_Destroy(targCmds, (FreeProc *)free); 2604 if (targets) 2605 Lst_Destroy(targets, NOFREE); 2606 Lst_Destroy(defIncPath, Dir_Destroy); 2607 Lst_Destroy(sysIncPath, Dir_Destroy); 2608 Lst_Destroy(parseIncPath, Dir_Destroy); 2609 Lst_Destroy(includes, NOFREE); /* Should be empty now */ 2610 #endif 2611 } 2612 2613 2614 /*- 2615 *----------------------------------------------------------------------- 2616 * Parse_MainName -- 2617 * Return a Lst of the main target to create for main()'s sake. If 2618 * no such target exists, we Punt with an obnoxious error message. 2619 * 2620 * Results: 2621 * A Lst of the single node to create. 2622 * 2623 * Side Effects: 2624 * None. 2625 * 2626 *----------------------------------------------------------------------- 2627 */ 2628 Lst 2629 Parse_MainName(void) 2630 { 2631 Lst mainList; /* result list */ 2632 2633 mainList = Lst_Init(FALSE); 2634 2635 if (mainNode == NILGNODE) { 2636 Punt("no target to make."); 2637 /*NOTREACHED*/ 2638 } else if (mainNode->type & OP_DOUBLEDEP) { 2639 (void)Lst_AtEnd(mainList, mainNode); 2640 Lst_Concat(mainList, mainNode->cohorts, LST_CONCNEW); 2641 } 2642 else 2643 (void)Lst_AtEnd(mainList, mainNode); 2644 Var_Append(".TARGETS", mainNode->name, VAR_GLOBAL); 2645 return (mainList); 2646 } 2647 2648 /*- 2649 *----------------------------------------------------------------------- 2650 * ParseMark -- 2651 * Add the filename and lineno to the GNode so that we remember 2652 * where it was first defined. 2653 * 2654 * Side Effects: 2655 * None. 2656 * 2657 *----------------------------------------------------------------------- 2658 */ 2659 static void 2660 ParseMark(GNode *gn) 2661 { 2662 gn->fname = curFile->fname; 2663 gn->lineno = curFile->lineno; 2664 } 2665