1 /* $NetBSD: parse.c,v 1.86 2002/12/01 05:53:30 sjg Exp $ */ 2 3 /* 4 * Copyright (c) 1988, 1989, 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * Copyright (c) 1989 by Berkeley Softworks 7 * All rights reserved. 8 * 9 * This code is derived from software contributed to Berkeley by 10 * Adam de Boor. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 */ 40 41 #ifdef MAKE_BOOTSTRAP 42 static char rcsid[] = "$NetBSD: parse.c,v 1.86 2002/12/01 05:53:30 sjg Exp $"; 43 #else 44 #include <sys/cdefs.h> 45 #ifndef lint 46 #if 0 47 static char sccsid[] = "@(#)parse.c 8.3 (Berkeley) 3/19/94"; 48 #else 49 __RCSID("$NetBSD: parse.c,v 1.86 2002/12/01 05:53:30 sjg Exp $"); 50 #endif 51 #endif /* not lint */ 52 #endif 53 54 /*- 55 * parse.c -- 56 * Functions to parse a makefile. 57 * 58 * One function, Parse_Init, must be called before any functions 59 * in this module are used. After that, the function Parse_File is the 60 * main entry point and controls most of the other functions in this 61 * module. 62 * 63 * Most important structures are kept in Lsts. Directories for 64 * the #include "..." function are kept in the 'parseIncPath' Lst, while 65 * those for the #include <...> are kept in the 'sysIncPath' Lst. The 66 * targets currently being defined are kept in the 'targets' Lst. 67 * 68 * The variables 'fname' and 'lineno' are used to track the name 69 * of the current file and the line number in that file so that error 70 * messages can be more meaningful. 71 * 72 * Interface: 73 * Parse_Init Initialization function which must be 74 * called before anything else in this module 75 * is used. 76 * 77 * Parse_End Cleanup the module 78 * 79 * Parse_File Function used to parse a makefile. It must 80 * be given the name of the file, which should 81 * already have been opened, and a function 82 * to call to read a character from the file. 83 * 84 * Parse_IsVar Returns TRUE if the given line is a 85 * variable assignment. Used by MainParseArgs 86 * to determine if an argument is a target 87 * or a variable assignment. Used internally 88 * for pretty much the same thing... 89 * 90 * Parse_Error Function called when an error occurs in 91 * parsing. Used by the variable and 92 * conditional modules. 93 * Parse_MainName Returns a Lst of the main target to create. 94 */ 95 96 #include <ctype.h> 97 #include <errno.h> 98 #include <stdarg.h> 99 #include <stdio.h> 100 101 #include "make.h" 102 #include "hash.h" 103 #include "dir.h" 104 #include "job.h" 105 #include "buf.h" 106 #include "pathnames.h" 107 108 /* 109 * These values are returned by ParseEOF to tell Parse_File whether to 110 * CONTINUE parsing, i.e. it had only reached the end of an include file, 111 * or if it's DONE. 112 */ 113 #define CONTINUE 1 114 #define DONE 0 115 static Lst targets; /* targets we're working on */ 116 #ifdef CLEANUP 117 static Lst targCmds; /* command lines for targets */ 118 #endif 119 static Boolean inLine; /* true if currently in a dependency 120 * line or its commands */ 121 typedef struct { 122 char *str; 123 char *ptr; 124 } PTR; 125 126 static int fatals = 0; 127 128 static GNode *mainNode; /* The main target to create. This is the 129 * first target on the first dependency 130 * line in the first makefile */ 131 typedef struct IFile { 132 char *fname; /* name of previous file */ 133 int lineno; /* saved line number */ 134 FILE * F; /* the open stream */ 135 PTR * P; /* the char pointer */ 136 } IFile; 137 138 static IFile curFile; 139 140 141 /* 142 * Definitions for handling #include specifications 143 */ 144 145 static Lst includes; /* stack of IFiles generated by 146 * #includes */ 147 Lst parseIncPath; /* list of directories for "..." includes */ 148 Lst sysIncPath; /* list of directories for <...> includes */ 149 Lst defIncPath; /* default directories for <...> includes */ 150 151 /*- 152 * specType contains the SPECial TYPE of the current target. It is 153 * Not if the target is unspecial. If it *is* special, however, the children 154 * are linked as children of the parent but not vice versa. This variable is 155 * set in ParseDoDependency 156 */ 157 typedef enum { 158 Begin, /* .BEGIN */ 159 Default, /* .DEFAULT */ 160 End, /* .END */ 161 Ignore, /* .IGNORE */ 162 Includes, /* .INCLUDES */ 163 Interrupt, /* .INTERRUPT */ 164 Libs, /* .LIBS */ 165 MFlags, /* .MFLAGS or .MAKEFLAGS */ 166 Main, /* .MAIN and we don't have anything user-specified to 167 * make */ 168 NoExport, /* .NOEXPORT */ 169 NoPath, /* .NOPATH */ 170 Not, /* Not special */ 171 NotParallel, /* .NOTPARALLEL */ 172 Null, /* .NULL */ 173 ExObjdir, /* .OBJDIR */ 174 Order, /* .ORDER */ 175 Parallel, /* .PARALLEL */ 176 ExPath, /* .PATH */ 177 Phony, /* .PHONY */ 178 #ifdef POSIX 179 Posix, /* .POSIX */ 180 #endif 181 Precious, /* .PRECIOUS */ 182 ExShell, /* .SHELL */ 183 Silent, /* .SILENT */ 184 SingleShell, /* .SINGLESHELL */ 185 Suffixes, /* .SUFFIXES */ 186 Wait, /* .WAIT */ 187 Attribute /* Generic attribute */ 188 } ParseSpecial; 189 190 static ParseSpecial specType; 191 static int waiting; 192 193 #define LPAREN '(' 194 #define RPAREN ')' 195 /* 196 * Predecessor node for handling .ORDER. Initialized to NILGNODE when .ORDER 197 * seen, then set to each successive source on the line. 198 */ 199 static GNode *predecessor; 200 201 /* 202 * The parseKeywords table is searched using binary search when deciding 203 * if a target or source is special. The 'spec' field is the ParseSpecial 204 * type of the keyword ("Not" if the keyword isn't special as a target) while 205 * the 'op' field is the operator to apply to the list of targets if the 206 * keyword is used as a source ("0" if the keyword isn't special as a source) 207 */ 208 static struct { 209 char *name; /* Name of keyword */ 210 ParseSpecial spec; /* Type when used as a target */ 211 int op; /* Operator when used as a source */ 212 } parseKeywords[] = { 213 { ".BEGIN", Begin, 0 }, 214 { ".DEFAULT", Default, 0 }, 215 { ".END", End, 0 }, 216 { ".EXEC", Attribute, OP_EXEC }, 217 { ".IGNORE", Ignore, OP_IGNORE }, 218 { ".INCLUDES", Includes, 0 }, 219 { ".INTERRUPT", Interrupt, 0 }, 220 { ".INVISIBLE", Attribute, OP_INVISIBLE }, 221 { ".JOIN", Attribute, OP_JOIN }, 222 { ".LIBS", Libs, 0 }, 223 { ".MADE", Attribute, OP_MADE }, 224 { ".MAIN", Main, 0 }, 225 { ".MAKE", Attribute, OP_MAKE }, 226 { ".MAKEFLAGS", MFlags, 0 }, 227 { ".MFLAGS", MFlags, 0 }, 228 { ".NOPATH", NoPath, OP_NOPATH }, 229 { ".NOTMAIN", Attribute, OP_NOTMAIN }, 230 { ".NOTPARALLEL", NotParallel, 0 }, 231 { ".NO_PARALLEL", NotParallel, 0 }, 232 { ".NULL", Null, 0 }, 233 { ".OBJDIR", ExObjdir, 0 }, 234 { ".OPTIONAL", Attribute, OP_OPTIONAL }, 235 { ".ORDER", Order, 0 }, 236 { ".PARALLEL", Parallel, 0 }, 237 { ".PATH", ExPath, 0 }, 238 { ".PHONY", Phony, OP_PHONY }, 239 #ifdef POSIX 240 { ".POSIX", Posix, 0 }, 241 #endif 242 { ".PRECIOUS", Precious, OP_PRECIOUS }, 243 { ".RECURSIVE", Attribute, OP_MAKE }, 244 { ".SHELL", ExShell, 0 }, 245 { ".SILENT", Silent, OP_SILENT }, 246 { ".SINGLESHELL", SingleShell, 0 }, 247 { ".SUFFIXES", Suffixes, 0 }, 248 { ".USE", Attribute, OP_USE }, 249 { ".USEBEFORE", Attribute, OP_USEBEFORE }, 250 { ".WAIT", Wait, 0 }, 251 }; 252 253 static int ParseIsEscaped(const char *, const char *); 254 static void ParseErrorInternal(char *, size_t, int, char *, ...) 255 __attribute__((__format__(__printf__, 4, 5))); 256 static void ParseVErrorInternal(char *, size_t, int, char *, va_list) 257 __attribute__((__format__(__printf__, 4, 0))); 258 static int ParseFindKeyword(char *); 259 static int ParseLinkSrc(ClientData, ClientData); 260 static int ParseDoOp(ClientData, ClientData); 261 static int ParseAddDep(ClientData, ClientData); 262 static void ParseDoSrc(int, char *, Lst); 263 static int ParseFindMain(ClientData, ClientData); 264 static int ParseAddDir(ClientData, ClientData); 265 static int ParseClearPath(ClientData, ClientData); 266 static void ParseDoDependency(char *); 267 static int ParseAddCmd(ClientData, ClientData); 268 static __inline int ParseReadc(void); 269 static void ParseUnreadc(int); 270 static void ParseHasCommands(ClientData); 271 static void ParseDoInclude(char *); 272 static void ParseSetParseFile(char *); 273 #ifdef SYSVINCLUDE 274 static void ParseTraditionalInclude(char *); 275 #endif 276 static int ParseEOF(int); 277 static char *ParseReadLine(void); 278 static char *ParseSkipLine(int); 279 static void ParseFinishLine(void); 280 static void ParseMark(GNode *); 281 282 extern int maxJobs; 283 284 285 /*- 286 *---------------------------------------------------------------------- 287 * ParseIsEscaped -- 288 * Check if the current character is escaped on the current line 289 * 290 * Results: 291 * 0 if the character is not backslash escaped, 1 otherwise 292 * 293 * Side Effects: 294 * None 295 *---------------------------------------------------------------------- 296 */ 297 static int 298 ParseIsEscaped(const char *line, const char *c) 299 { 300 int active = 0; 301 for (;;) { 302 if (line == c) 303 return active; 304 if (*--c != '\\') 305 return active; 306 active = !active; 307 } 308 } 309 310 /*- 311 *---------------------------------------------------------------------- 312 * ParseFindKeyword -- 313 * Look in the table of keywords for one matching the given string. 314 * 315 * Input: 316 * str String to find 317 * 318 * Results: 319 * The index of the keyword, or -1 if it isn't there. 320 * 321 * Side Effects: 322 * None 323 *---------------------------------------------------------------------- 324 */ 325 static int 326 ParseFindKeyword(char *str) 327 { 328 int start, end, cur; 329 int diff; 330 331 start = 0; 332 end = (sizeof(parseKeywords)/sizeof(parseKeywords[0])) - 1; 333 334 do { 335 cur = start + ((end - start) / 2); 336 diff = strcmp (str, parseKeywords[cur].name); 337 338 if (diff == 0) { 339 return (cur); 340 } else if (diff < 0) { 341 end = cur - 1; 342 } else { 343 start = cur + 1; 344 } 345 } while (start <= end); 346 return (-1); 347 } 348 349 /*- 350 * ParseVErrorInternal -- 351 * Error message abort function for parsing. Prints out the context 352 * of the error (line number and file) as well as the message with 353 * two optional arguments. 354 * 355 * Results: 356 * None 357 * 358 * Side Effects: 359 * "fatals" is incremented if the level is PARSE_FATAL. 360 */ 361 /* VARARGS */ 362 static void 363 ParseVErrorInternal(char *cfname, size_t clineno, int type, char *fmt, 364 va_list ap) 365 { 366 static Boolean fatal_warning_error_printed = FALSE; 367 368 (void)fprintf(stderr, "%s: \"", progname); 369 370 if (*cfname != '/') { 371 char *cp, *dir; 372 373 /* 374 * Nothing is more anoying than not knowing which Makefile 375 * is the culprit. 376 */ 377 dir = Var_Value(".PARSEDIR", VAR_GLOBAL, &cp); 378 if (dir == NULL || *dir == '\0' || 379 (*dir == '.' && dir[1] == '\0')) 380 dir = Var_Value(".CURDIR", VAR_GLOBAL, &cp); 381 if (dir == NULL) 382 dir = "."; 383 384 (void)fprintf(stderr, "%s/%s", dir, cfname); 385 } else 386 (void)fprintf(stderr, "%s", cfname); 387 388 (void)fprintf(stderr, "\" line %d: ", (int)clineno); 389 if (type == PARSE_WARNING) 390 (void)fprintf(stderr, "warning: "); 391 (void)vfprintf(stderr, fmt, ap); 392 (void)fprintf(stderr, "\n"); 393 (void)fflush(stderr); 394 if (type == PARSE_FATAL || parseWarnFatal) 395 fatals += 1; 396 if (parseWarnFatal && !fatal_warning_error_printed) { 397 Error("parsing warnings being treated as errors"); 398 fatal_warning_error_printed = TRUE; 399 } 400 } 401 402 /*- 403 * ParseErrorInternal -- 404 * Error function 405 * 406 * Results: 407 * None 408 * 409 * Side Effects: 410 * None 411 */ 412 /* VARARGS */ 413 static void 414 ParseErrorInternal(char *cfname, size_t clineno, int type, char *fmt, ...) 415 { 416 va_list ap; 417 418 va_start(ap, fmt); 419 ParseVErrorInternal(cfname, clineno, type, fmt, ap); 420 va_end(ap); 421 } 422 423 /*- 424 * Parse_Error -- 425 * External interface to ParseErrorInternal; uses the default filename 426 * Line number. 427 * 428 * Results: 429 * None 430 * 431 * Side Effects: 432 * None 433 */ 434 /* VARARGS */ 435 void 436 Parse_Error(int type, char *fmt, ...) 437 { 438 va_list ap; 439 440 va_start(ap, fmt); 441 ParseVErrorInternal(curFile.fname, curFile.lineno, type, fmt, ap); 442 va_end(ap); 443 } 444 445 /*- 446 *--------------------------------------------------------------------- 447 * ParseLinkSrc -- 448 * Link the parent node to its new child. Used in a Lst_ForEach by 449 * ParseDoDependency. If the specType isn't 'Not', the parent 450 * isn't linked as a parent of the child. 451 * 452 * Input: 453 * pgnp The parent node 454 * cgpn The child node 455 * 456 * Results: 457 * Always = 0 458 * 459 * Side Effects: 460 * New elements are added to the parents list of cgn and the 461 * children list of cgn. the unmade field of pgn is updated 462 * to reflect the additional child. 463 *--------------------------------------------------------------------- 464 */ 465 static int 466 ParseLinkSrc(ClientData pgnp, ClientData cgnp) 467 { 468 GNode *pgn = (GNode *) pgnp; 469 GNode *cgn = (GNode *) cgnp; 470 471 if ((pgn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (pgn->cohorts)) 472 pgn = (GNode *) Lst_Datum (Lst_Last (pgn->cohorts)); 473 (void)Lst_AtEnd (pgn->children, (ClientData)cgn); 474 if (specType == Not) 475 (void)Lst_AtEnd (cgn->parents, (ClientData)pgn); 476 pgn->unmade += 1; 477 return (0); 478 } 479 480 /*- 481 *--------------------------------------------------------------------- 482 * ParseDoOp -- 483 * Apply the parsed operator to the given target node. Used in a 484 * Lst_ForEach call by ParseDoDependency once all targets have 485 * been found and their operator parsed. If the previous and new 486 * operators are incompatible, a major error is taken. 487 * 488 * Input: 489 * gnp The node to which the operator is to be applied 490 * opp The operator to apply 491 * 492 * Results: 493 * Always 0 494 * 495 * Side Effects: 496 * The type field of the node is altered to reflect any new bits in 497 * the op. 498 *--------------------------------------------------------------------- 499 */ 500 static int 501 ParseDoOp(ClientData gnp, ClientData opp) 502 { 503 GNode *gn = (GNode *) gnp; 504 int op = *(int *) opp; 505 /* 506 * If the dependency mask of the operator and the node don't match and 507 * the node has actually had an operator applied to it before, and 508 * the operator actually has some dependency information in it, complain. 509 */ 510 if (((op & OP_OPMASK) != (gn->type & OP_OPMASK)) && 511 !OP_NOP(gn->type) && !OP_NOP(op)) 512 { 513 Parse_Error (PARSE_FATAL, "Inconsistent operator for %s", gn->name); 514 return (1); 515 } 516 517 if ((op == OP_DOUBLEDEP) && ((gn->type & OP_OPMASK) == OP_DOUBLEDEP)) { 518 /* 519 * If the node was the object of a :: operator, we need to create a 520 * new instance of it for the children and commands on this dependency 521 * line. The new instance is placed on the 'cohorts' list of the 522 * initial one (note the initial one is not on its own cohorts list) 523 * and the new instance is linked to all parents of the initial 524 * instance. 525 */ 526 GNode *cohort; 527 528 /* 529 * Propagate copied bits to the initial node. They'll be propagated 530 * back to the rest of the cohorts later. 531 */ 532 gn->type |= op & ~OP_OPMASK; 533 534 cohort = Targ_NewGN(gn->name); 535 /* 536 * Make the cohort invisible as well to avoid duplicating it into 537 * other variables. True, parents of this target won't tend to do 538 * anything with their local variables, but better safe than 539 * sorry. (I think this is pointless now, since the relevant list 540 * traversals will no longer see this node anyway. -mycroft) 541 */ 542 cohort->type = op | OP_INVISIBLE; 543 (void)Lst_AtEnd(gn->cohorts, (ClientData)cohort); 544 cohort->centurion = gn; 545 gn->unmade_cohorts += 1; 546 } else { 547 /* 548 * We don't want to nuke any previous flags (whatever they were) so we 549 * just OR the new operator into the old 550 */ 551 gn->type |= op; 552 } 553 554 return (0); 555 } 556 557 /*- 558 *--------------------------------------------------------------------- 559 * ParseAddDep -- 560 * Check if the pair of GNodes given needs to be synchronized. 561 * This has to be when two nodes are on different sides of a 562 * .WAIT directive. 563 * 564 * Results: 565 * Returns 1 if the two targets need to be ordered, 0 otherwise. 566 * If it returns 1, the search can stop 567 * 568 * Side Effects: 569 * A dependency can be added between the two nodes. 570 * 571 *--------------------------------------------------------------------- 572 */ 573 static int 574 ParseAddDep(ClientData pp, ClientData sp) 575 { 576 GNode *p = (GNode *) pp; 577 GNode *s = (GNode *) sp; 578 579 if (p->order < s->order) { 580 /* 581 * XXX: This can cause loops, and loops can cause unmade targets, 582 * but checking is tedious, and the debugging output can show the 583 * problem 584 */ 585 (void)Lst_AtEnd(p->successors, (ClientData)s); 586 (void)Lst_AtEnd(s->preds, (ClientData)p); 587 return 0; 588 } 589 else 590 return 1; 591 } 592 593 594 /*- 595 *--------------------------------------------------------------------- 596 * ParseDoSrc -- 597 * Given the name of a source, figure out if it is an attribute 598 * and apply it to the targets if it is. Else decide if there is 599 * some attribute which should be applied *to* the source because 600 * of some special target and apply it if so. Otherwise, make the 601 * source be a child of the targets in the list 'targets' 602 * 603 * Input: 604 * tOp operator (if any) from special targets 605 * src name of the source to handle 606 * allsrc List of all sources to wait for 607 * 608 * Results: 609 * None 610 * 611 * Side Effects: 612 * Operator bits may be added to the list of targets or to the source. 613 * The targets may have a new source added to their lists of children. 614 *--------------------------------------------------------------------- 615 */ 616 static void 617 ParseDoSrc(int tOp, char *src, Lst allsrc) 618 { 619 GNode *gn = NULL; 620 621 if (*src == '.' && isupper ((unsigned char)src[1])) { 622 int keywd = ParseFindKeyword(src); 623 if (keywd != -1) { 624 int op = parseKeywords[keywd].op; 625 if (op != 0) { 626 Lst_ForEach (targets, ParseDoOp, (ClientData)&op); 627 return; 628 } 629 if (parseKeywords[keywd].spec == Wait) { 630 waiting++; 631 return; 632 } 633 } 634 } 635 636 switch (specType) { 637 case Main: 638 /* 639 * If we have noted the existence of a .MAIN, it means we need 640 * to add the sources of said target to the list of things 641 * to create. The string 'src' is likely to be free, so we 642 * must make a new copy of it. Note that this will only be 643 * invoked if the user didn't specify a target on the command 644 * line. This is to allow #ifmake's to succeed, or something... 645 */ 646 (void) Lst_AtEnd (create, (ClientData)estrdup(src)); 647 /* 648 * Add the name to the .TARGETS variable as well, so the user cna 649 * employ that, if desired. 650 */ 651 Var_Append(".TARGETS", src, VAR_GLOBAL); 652 return; 653 654 case Order: 655 /* 656 * Create proper predecessor/successor links between the previous 657 * source and the current one. 658 */ 659 gn = Targ_FindNode(src, TARG_CREATE); 660 if (predecessor != NILGNODE) { 661 (void)Lst_AtEnd(predecessor->successors, (ClientData)gn); 662 (void)Lst_AtEnd(gn->preds, (ClientData)predecessor); 663 } 664 /* 665 * The current source now becomes the predecessor for the next one. 666 */ 667 predecessor = gn; 668 break; 669 670 default: 671 /* 672 * If the source is not an attribute, we need to find/create 673 * a node for it. After that we can apply any operator to it 674 * from a special target or link it to its parents, as 675 * appropriate. 676 * 677 * In the case of a source that was the object of a :: operator, 678 * the attribute is applied to all of its instances (as kept in 679 * the 'cohorts' list of the node) or all the cohorts are linked 680 * to all the targets. 681 */ 682 gn = Targ_FindNode (src, TARG_CREATE); 683 if (tOp) { 684 gn->type |= tOp; 685 } else { 686 Lst_ForEach (targets, ParseLinkSrc, (ClientData)gn); 687 } 688 break; 689 } 690 691 gn->order = waiting; 692 (void)Lst_AtEnd(allsrc, (ClientData)gn); 693 if (waiting) { 694 Lst_ForEach(allsrc, ParseAddDep, (ClientData)gn); 695 } 696 } 697 698 /*- 699 *----------------------------------------------------------------------- 700 * ParseFindMain -- 701 * Find a real target in the list and set it to be the main one. 702 * Called by ParseDoDependency when a main target hasn't been found 703 * yet. 704 * 705 * Input: 706 * gnp Node to examine 707 * 708 * Results: 709 * 0 if main not found yet, 1 if it is. 710 * 711 * Side Effects: 712 * mainNode is changed and Targ_SetMain is called. 713 * 714 *----------------------------------------------------------------------- 715 */ 716 static int 717 ParseFindMain(ClientData gnp, ClientData dummy) 718 { 719 GNode *gn = (GNode *) gnp; 720 if ((gn->type & OP_NOTARGET) == 0) { 721 mainNode = gn; 722 Targ_SetMain(gn); 723 return (dummy ? 1 : 1); 724 } else { 725 return (dummy ? 0 : 0); 726 } 727 } 728 729 /*- 730 *----------------------------------------------------------------------- 731 * ParseAddDir -- 732 * Front-end for Dir_AddDir to make sure Lst_ForEach keeps going 733 * 734 * Results: 735 * === 0 736 * 737 * Side Effects: 738 * See Dir_AddDir. 739 * 740 *----------------------------------------------------------------------- 741 */ 742 static int 743 ParseAddDir(ClientData path, ClientData name) 744 { 745 (void) Dir_AddDir((Lst) path, (char *) name); 746 return(0); 747 } 748 749 /*- 750 *----------------------------------------------------------------------- 751 * ParseClearPath -- 752 * Front-end for Dir_ClearPath to make sure Lst_ForEach keeps going 753 * 754 * Results: 755 * === 0 756 * 757 * Side Effects: 758 * See Dir_ClearPath 759 * 760 *----------------------------------------------------------------------- 761 */ 762 static int 763 ParseClearPath(ClientData path, ClientData dummy) 764 { 765 Dir_ClearPath((Lst) path); 766 return(dummy ? 0 : 0); 767 } 768 769 /*- 770 *--------------------------------------------------------------------- 771 * ParseDoDependency -- 772 * Parse the dependency line in line. 773 * 774 * Input: 775 * line the line to parse 776 * 777 * Results: 778 * None 779 * 780 * Side Effects: 781 * The nodes of the sources are linked as children to the nodes of the 782 * targets. Some nodes may be created. 783 * 784 * We parse a dependency line by first extracting words from the line and 785 * finding nodes in the list of all targets with that name. This is done 786 * until a character is encountered which is an operator character. Currently 787 * these are only ! and :. At this point the operator is parsed and the 788 * pointer into the line advanced until the first source is encountered. 789 * The parsed operator is applied to each node in the 'targets' list, 790 * which is where the nodes found for the targets are kept, by means of 791 * the ParseDoOp function. 792 * The sources are read in much the same way as the targets were except 793 * that now they are expanded using the wildcarding scheme of the C-Shell 794 * and all instances of the resulting words in the list of all targets 795 * are found. Each of the resulting nodes is then linked to each of the 796 * targets as one of its children. 797 * Certain targets are handled specially. These are the ones detailed 798 * by the specType variable. 799 * The storing of transformation rules is also taken care of here. 800 * A target is recognized as a transformation rule by calling 801 * Suff_IsTransform. If it is a transformation rule, its node is gotten 802 * from the suffix module via Suff_AddTransform rather than the standard 803 * Targ_FindNode in the target module. 804 *--------------------------------------------------------------------- 805 */ 806 static void 807 ParseDoDependency(char *line) 808 { 809 char *cp; /* our current position */ 810 GNode *gn; /* a general purpose temporary node */ 811 int op; /* the operator on the line */ 812 char savec; /* a place to save a character */ 813 Lst paths; /* List of search paths to alter when parsing 814 * a list of .PATH targets */ 815 int tOp; /* operator from special target */ 816 Lst sources; /* list of archive source names after 817 * expansion */ 818 Lst curTargs; /* list of target names to be found and added 819 * to the targets list */ 820 Lst curSrcs; /* list of sources in order */ 821 char *lstart = line; 822 823 tOp = 0; 824 825 specType = Not; 826 waiting = 0; 827 paths = (Lst)NULL; 828 829 curTargs = Lst_Init(FALSE); 830 curSrcs = Lst_Init(FALSE); 831 832 do { 833 for (cp = line; 834 *cp && (ParseIsEscaped(lstart, cp) || 835 (!isspace ((unsigned char)*cp) && 836 (*cp != '!') && (*cp != ':') && (*cp != LPAREN))); 837 cp++) 838 { 839 if (*cp == '$') { 840 /* 841 * Must be a dynamic source (would have been expanded 842 * otherwise), so call the Var module to parse the puppy 843 * so we can safely advance beyond it...There should be 844 * no errors in this, as they would have been discovered 845 * in the initial Var_Subst and we wouldn't be here. 846 */ 847 int length; 848 Boolean freeIt; 849 char *result; 850 851 result=Var_Parse(cp, VAR_CMD, TRUE, &length, &freeIt); 852 853 if (freeIt) { 854 free(result); 855 } 856 cp += length-1; 857 } 858 continue; 859 } 860 if (!ParseIsEscaped(lstart, cp) && *cp == LPAREN) { 861 /* 862 * Archives must be handled specially to make sure the OP_ARCHV 863 * flag is set in their 'type' field, for one thing, and because 864 * things like "archive(file1.o file2.o file3.o)" are permissible. 865 * Arch_ParseArchive will set 'line' to be the first non-blank 866 * after the archive-spec. It creates/finds nodes for the members 867 * and places them on the given list, returning SUCCESS if all 868 * went well and FAILURE if there was an error in the 869 * specification. On error, line should remain untouched. 870 */ 871 if (Arch_ParseArchive (&line, targets, VAR_CMD) != SUCCESS) { 872 Parse_Error (PARSE_FATAL, 873 "Error in archive specification: \"%s\"", line); 874 return; 875 } else { 876 continue; 877 } 878 } 879 savec = *cp; 880 881 if (!*cp) { 882 /* 883 * Ending a dependency line without an operator is a Bozo 884 * no-no. As a heuristic, this is also often triggered by 885 * undetected conflicts from cvs/rcs merges. 886 */ 887 if ((strncmp(line, "<<<<<<", 6) == 0) || 888 (strncmp(line, "======", 6) == 0) || 889 (strncmp(line, ">>>>>>", 6) == 0)) 890 Parse_Error (PARSE_FATAL, 891 "Makefile appears to contain unresolved cvs/rcs/??? merge conflicts"); 892 else 893 Parse_Error (PARSE_FATAL, "Need an operator"); 894 return; 895 } 896 *cp = '\0'; 897 /* 898 * Have a word in line. See if it's a special target and set 899 * specType to match it. 900 */ 901 if (*line == '.' && isupper ((unsigned char)line[1])) { 902 /* 903 * See if the target is a special target that must have it 904 * or its sources handled specially. 905 */ 906 int keywd = ParseFindKeyword(line); 907 if (keywd != -1) { 908 if (specType == ExPath && parseKeywords[keywd].spec != ExPath) { 909 Parse_Error(PARSE_FATAL, "Mismatched special targets"); 910 return; 911 } 912 913 specType = parseKeywords[keywd].spec; 914 tOp = parseKeywords[keywd].op; 915 916 /* 917 * Certain special targets have special semantics: 918 * .PATH Have to set the dirSearchPath 919 * variable too 920 * .MAIN Its sources are only used if 921 * nothing has been specified to 922 * create. 923 * .DEFAULT Need to create a node to hang 924 * commands on, but we don't want 925 * it in the graph, nor do we want 926 * it to be the Main Target, so we 927 * create it, set OP_NOTMAIN and 928 * add it to the list, setting 929 * DEFAULT to the new node for 930 * later use. We claim the node is 931 * A transformation rule to make 932 * life easier later, when we'll 933 * use Make_HandleUse to actually 934 * apply the .DEFAULT commands. 935 * .PHONY The list of targets 936 * .NOPATH Don't search for file in the path 937 * .BEGIN 938 * .END 939 * .INTERRUPT Are not to be considered the 940 * main target. 941 * .NOTPARALLEL Make only one target at a time. 942 * .SINGLESHELL Create a shell for each command. 943 * .ORDER Must set initial predecessor to NIL 944 */ 945 switch (specType) { 946 case ExPath: 947 if (paths == NULL) { 948 paths = Lst_Init(FALSE); 949 } 950 (void)Lst_AtEnd(paths, (ClientData)dirSearchPath); 951 break; 952 case Main: 953 if (!Lst_IsEmpty(create)) { 954 specType = Not; 955 } 956 break; 957 case Begin: 958 case End: 959 case Interrupt: 960 gn = Targ_FindNode(line, TARG_CREATE); 961 gn->type |= OP_NOTMAIN; 962 (void)Lst_AtEnd(targets, (ClientData)gn); 963 break; 964 case Default: 965 gn = Targ_NewGN(".DEFAULT"); 966 gn->type |= (OP_NOTMAIN|OP_TRANSFORM); 967 (void)Lst_AtEnd(targets, (ClientData)gn); 968 DEFAULT = gn; 969 break; 970 case NotParallel: 971 { 972 maxJobs = 1; 973 break; 974 } 975 case SingleShell: 976 compatMake = TRUE; 977 break; 978 case Order: 979 predecessor = NILGNODE; 980 break; 981 default: 982 break; 983 } 984 } else if (strncmp (line, ".PATH", 5) == 0) { 985 /* 986 * .PATH<suffix> has to be handled specially. 987 * Call on the suffix module to give us a path to 988 * modify. 989 */ 990 Lst path; 991 992 specType = ExPath; 993 path = Suff_GetPath (&line[5]); 994 if (path == NILLST) { 995 Parse_Error (PARSE_FATAL, 996 "Suffix '%s' not defined (yet)", 997 &line[5]); 998 return; 999 } else { 1000 if (paths == (Lst)NULL) { 1001 paths = Lst_Init(FALSE); 1002 } 1003 (void)Lst_AtEnd(paths, (ClientData)path); 1004 } 1005 } 1006 } 1007 1008 /* 1009 * Have word in line. Get or create its node and stick it at 1010 * the end of the targets list 1011 */ 1012 if ((specType == Not) && (*line != '\0')) { 1013 if (Dir_HasWildcards(line)) { 1014 /* 1015 * Targets are to be sought only in the current directory, 1016 * so create an empty path for the thing. Note we need to 1017 * use Dir_Destroy in the destruction of the path as the 1018 * Dir module could have added a directory to the path... 1019 */ 1020 Lst emptyPath = Lst_Init(FALSE); 1021 1022 Dir_Expand(line, emptyPath, curTargs); 1023 1024 Lst_Destroy(emptyPath, Dir_Destroy); 1025 } else { 1026 /* 1027 * No wildcards, but we want to avoid code duplication, 1028 * so create a list with the word on it. 1029 */ 1030 (void)Lst_AtEnd(curTargs, (ClientData)line); 1031 } 1032 1033 while(!Lst_IsEmpty(curTargs)) { 1034 char *targName = (char *)Lst_DeQueue(curTargs); 1035 1036 if (!Suff_IsTransform (targName)) { 1037 gn = Targ_FindNode (targName, TARG_CREATE); 1038 } else { 1039 gn = Suff_AddTransform (targName); 1040 } 1041 1042 (void)Lst_AtEnd (targets, (ClientData)gn); 1043 } 1044 } else if (specType == ExPath && *line != '.' && *line != '\0') { 1045 Parse_Error(PARSE_WARNING, "Extra target (%s) ignored", line); 1046 } 1047 1048 *cp = savec; 1049 /* 1050 * If it is a special type and not .PATH, it's the only target we 1051 * allow on this line... 1052 */ 1053 if (specType != Not && specType != ExPath) { 1054 Boolean warn = FALSE; 1055 1056 while (*cp && (ParseIsEscaped(lstart, cp) || 1057 ((*cp != '!') && (*cp != ':')))) { 1058 if (ParseIsEscaped(lstart, cp) || 1059 (*cp != ' ' && *cp != '\t')) { 1060 warn = TRUE; 1061 } 1062 cp++; 1063 } 1064 if (warn) { 1065 Parse_Error(PARSE_WARNING, "Extra target ignored"); 1066 } 1067 } else { 1068 while (*cp && isspace ((unsigned char)*cp)) { 1069 cp++; 1070 } 1071 } 1072 line = cp; 1073 } while (*line && (ParseIsEscaped(lstart, line) || 1074 ((*line != '!') && (*line != ':')))); 1075 1076 /* 1077 * Don't need the list of target names anymore... 1078 */ 1079 Lst_Destroy(curTargs, NOFREE); 1080 1081 if (!Lst_IsEmpty(targets)) { 1082 switch(specType) { 1083 default: 1084 Parse_Error(PARSE_WARNING, "Special and mundane targets don't mix. Mundane ones ignored"); 1085 break; 1086 case Default: 1087 case Begin: 1088 case End: 1089 case Interrupt: 1090 /* 1091 * These four create nodes on which to hang commands, so 1092 * targets shouldn't be empty... 1093 */ 1094 case Not: 1095 /* 1096 * Nothing special here -- targets can be empty if it wants. 1097 */ 1098 break; 1099 } 1100 } 1101 1102 /* 1103 * Have now parsed all the target names. Must parse the operator next. The 1104 * result is left in op . 1105 */ 1106 if (*cp == '!') { 1107 op = OP_FORCE; 1108 } else if (*cp == ':') { 1109 if (cp[1] == ':') { 1110 op = OP_DOUBLEDEP; 1111 cp++; 1112 } else { 1113 op = OP_DEPENDS; 1114 } 1115 } else { 1116 Parse_Error (PARSE_FATAL, "Missing dependency operator"); 1117 return; 1118 } 1119 1120 cp++; /* Advance beyond operator */ 1121 1122 Lst_ForEach (targets, ParseDoOp, (ClientData)&op); 1123 1124 /* 1125 * Get to the first source 1126 */ 1127 while (*cp && isspace ((unsigned char)*cp)) { 1128 cp++; 1129 } 1130 line = cp; 1131 1132 /* 1133 * Several special targets take different actions if present with no 1134 * sources: 1135 * a .SUFFIXES line with no sources clears out all old suffixes 1136 * a .PRECIOUS line makes all targets precious 1137 * a .IGNORE line ignores errors for all targets 1138 * a .SILENT line creates silence when making all targets 1139 * a .PATH removes all directories from the search path(s). 1140 */ 1141 if (!*line) { 1142 switch (specType) { 1143 case Suffixes: 1144 Suff_ClearSuffixes (); 1145 break; 1146 case Precious: 1147 allPrecious = TRUE; 1148 break; 1149 case Ignore: 1150 ignoreErrors = TRUE; 1151 break; 1152 case Silent: 1153 beSilent = TRUE; 1154 break; 1155 case ExPath: 1156 Lst_ForEach(paths, ParseClearPath, (ClientData)NULL); 1157 Dir_SetPATH(); 1158 break; 1159 #ifdef POSIX 1160 case Posix: 1161 Var_Set("%POSIX", "1003.2", VAR_GLOBAL, 0); 1162 break; 1163 #endif 1164 default: 1165 break; 1166 } 1167 } else if (specType == MFlags) { 1168 /* 1169 * Call on functions in main.c to deal with these arguments and 1170 * set the initial character to a null-character so the loop to 1171 * get sources won't get anything 1172 */ 1173 Main_ParseArgLine (line); 1174 *line = '\0'; 1175 } else if (specType == ExShell) { 1176 if (Job_ParseShell (line) != SUCCESS) { 1177 Parse_Error (PARSE_FATAL, "improper shell specification"); 1178 return; 1179 } 1180 *line = '\0'; 1181 } else if ((specType == NotParallel) || (specType == SingleShell)) { 1182 *line = '\0'; 1183 } 1184 1185 /* 1186 * NOW GO FOR THE SOURCES 1187 */ 1188 if ((specType == Suffixes) || (specType == ExPath) || 1189 (specType == Includes) || (specType == Libs) || 1190 (specType == Null) || (specType == ExObjdir)) 1191 { 1192 while (*line) { 1193 /* 1194 * If the target was one that doesn't take files as its sources 1195 * but takes something like suffixes, we take each 1196 * space-separated word on the line as a something and deal 1197 * with it accordingly. 1198 * 1199 * If the target was .SUFFIXES, we take each source as a 1200 * suffix and add it to the list of suffixes maintained by the 1201 * Suff module. 1202 * 1203 * If the target was a .PATH, we add the source as a directory 1204 * to search on the search path. 1205 * 1206 * If it was .INCLUDES, the source is taken to be the suffix of 1207 * files which will be #included and whose search path should 1208 * be present in the .INCLUDES variable. 1209 * 1210 * If it was .LIBS, the source is taken to be the suffix of 1211 * files which are considered libraries and whose search path 1212 * should be present in the .LIBS variable. 1213 * 1214 * If it was .NULL, the source is the suffix to use when a file 1215 * has no valid suffix. 1216 * 1217 * If it was .OBJDIR, the source is a new definition for .OBJDIR, 1218 * and will cause make to do a new chdir to that path. 1219 */ 1220 while (*cp && !isspace ((unsigned char)*cp)) { 1221 cp++; 1222 } 1223 savec = *cp; 1224 *cp = '\0'; 1225 switch (specType) { 1226 case Suffixes: 1227 Suff_AddSuffix (line, &mainNode); 1228 break; 1229 case ExPath: 1230 Lst_ForEach(paths, ParseAddDir, (ClientData)line); 1231 break; 1232 case Includes: 1233 Suff_AddInclude (line); 1234 break; 1235 case Libs: 1236 Suff_AddLib (line); 1237 break; 1238 case Null: 1239 Suff_SetNull (line); 1240 break; 1241 case ExObjdir: 1242 Main_SetObjdir(line); 1243 break; 1244 default: 1245 break; 1246 } 1247 *cp = savec; 1248 if (savec != '\0') { 1249 cp++; 1250 } 1251 while (*cp && isspace ((unsigned char)*cp)) { 1252 cp++; 1253 } 1254 line = cp; 1255 } 1256 if (paths) { 1257 Lst_Destroy(paths, NOFREE); 1258 } 1259 if (specType == ExPath) 1260 Dir_SetPATH(); 1261 } else { 1262 while (*line) { 1263 /* 1264 * The targets take real sources, so we must beware of archive 1265 * specifications (i.e. things with left parentheses in them) 1266 * and handle them accordingly. 1267 */ 1268 while (*cp && !isspace ((unsigned char)*cp)) { 1269 if ((*cp == LPAREN) && (cp > line) && (cp[-1] != '$')) { 1270 /* 1271 * Only stop for a left parenthesis if it isn't at the 1272 * start of a word (that'll be for variable changes 1273 * later) and isn't preceded by a dollar sign (a dynamic 1274 * source). 1275 */ 1276 break; 1277 } else { 1278 cp++; 1279 } 1280 } 1281 1282 if (*cp == LPAREN) { 1283 sources = Lst_Init (FALSE); 1284 if (Arch_ParseArchive (&line, sources, VAR_CMD) != SUCCESS) { 1285 Parse_Error (PARSE_FATAL, 1286 "Error in source archive spec \"%s\"", line); 1287 return; 1288 } 1289 1290 while (!Lst_IsEmpty (sources)) { 1291 gn = (GNode *) Lst_DeQueue (sources); 1292 ParseDoSrc (tOp, gn->name, curSrcs); 1293 } 1294 Lst_Destroy (sources, NOFREE); 1295 cp = line; 1296 } else { 1297 if (*cp) { 1298 *cp = '\0'; 1299 cp += 1; 1300 } 1301 1302 ParseDoSrc (tOp, line, curSrcs); 1303 } 1304 while (*cp && isspace ((unsigned char)*cp)) { 1305 cp++; 1306 } 1307 line = cp; 1308 } 1309 } 1310 1311 if (mainNode == NILGNODE) { 1312 /* 1313 * If we have yet to decide on a main target to make, in the 1314 * absence of any user input, we want the first target on 1315 * the first dependency line that is actually a real target 1316 * (i.e. isn't a .USE or .EXEC rule) to be made. 1317 */ 1318 Lst_ForEach (targets, ParseFindMain, (ClientData)0); 1319 } 1320 1321 /* 1322 * Finally, destroy the list of sources 1323 */ 1324 Lst_Destroy(curSrcs, NOFREE); 1325 } 1326 1327 /*- 1328 *--------------------------------------------------------------------- 1329 * Parse_IsVar -- 1330 * Return TRUE if the passed line is a variable assignment. A variable 1331 * assignment consists of a single word followed by optional whitespace 1332 * followed by either a += or an = operator. 1333 * This function is used both by the Parse_File function and main when 1334 * parsing the command-line arguments. 1335 * 1336 * Input: 1337 * line the line to check 1338 * 1339 * Results: 1340 * TRUE if it is. FALSE if it ain't 1341 * 1342 * Side Effects: 1343 * none 1344 *--------------------------------------------------------------------- 1345 */ 1346 Boolean 1347 Parse_IsVar(char *line) 1348 { 1349 Boolean wasSpace = FALSE; /* set TRUE if found a space */ 1350 Boolean haveName = FALSE; /* Set TRUE if have a variable name */ 1351 int level = 0; 1352 #define ISEQOPERATOR(c) \ 1353 (((c) == '+') || ((c) == ':') || ((c) == '?') || ((c) == '!')) 1354 1355 /* 1356 * Skip to variable name 1357 */ 1358 for (;(*line == ' ') || (*line == '\t'); line++) 1359 continue; 1360 1361 for (; *line != '=' || level != 0; line++) 1362 switch (*line) { 1363 case '\0': 1364 /* 1365 * end-of-line -- can't be a variable assignment. 1366 */ 1367 return FALSE; 1368 1369 case ' ': 1370 case '\t': 1371 /* 1372 * there can be as much white space as desired so long as there is 1373 * only one word before the operator 1374 */ 1375 wasSpace = TRUE; 1376 break; 1377 1378 case LPAREN: 1379 case '{': 1380 level++; 1381 break; 1382 1383 case '}': 1384 case RPAREN: 1385 level--; 1386 break; 1387 1388 default: 1389 if (wasSpace && haveName) { 1390 if (ISEQOPERATOR(*line)) { 1391 /* 1392 * We must have a finished word 1393 */ 1394 if (level != 0) 1395 return FALSE; 1396 1397 /* 1398 * When an = operator [+?!:] is found, the next 1399 * character must be an = or it ain't a valid 1400 * assignment. 1401 */ 1402 if (line[1] == '=') 1403 return haveName; 1404 #ifdef SUNSHCMD 1405 /* 1406 * This is a shell command 1407 */ 1408 if (strncmp(line, ":sh", 3) == 0) 1409 return haveName; 1410 #endif 1411 } 1412 /* 1413 * This is the start of another word, so not assignment. 1414 */ 1415 return FALSE; 1416 } 1417 else { 1418 haveName = TRUE; 1419 wasSpace = FALSE; 1420 } 1421 break; 1422 } 1423 1424 return haveName; 1425 } 1426 1427 /*- 1428 *--------------------------------------------------------------------- 1429 * Parse_DoVar -- 1430 * Take the variable assignment in the passed line and do it in the 1431 * global context. 1432 * 1433 * Note: There is a lexical ambiguity with assignment modifier characters 1434 * in variable names. This routine interprets the character before the = 1435 * as a modifier. Therefore, an assignment like 1436 * C++=/usr/bin/CC 1437 * is interpreted as "C+ +=" instead of "C++ =". 1438 * 1439 * Input: 1440 * line a line guaranteed to be a variable assignment. 1441 * This reduces error checks 1442 * ctxt Context in which to do the assignment 1443 * 1444 * Results: 1445 * none 1446 * 1447 * Side Effects: 1448 * the variable structure of the given variable name is altered in the 1449 * global context. 1450 *--------------------------------------------------------------------- 1451 */ 1452 void 1453 Parse_DoVar(char *line, GNode *ctxt) 1454 { 1455 char *cp; /* pointer into line */ 1456 enum { 1457 VAR_SUBST, VAR_APPEND, VAR_SHELL, VAR_NORMAL 1458 } type; /* Type of assignment */ 1459 char *opc; /* ptr to operator character to 1460 * null-terminate the variable name */ 1461 Boolean freeCp = FALSE; /* TRUE if cp needs to be freed, 1462 * i.e. if any variable expansion was 1463 * performed */ 1464 /* 1465 * Avoid clobbered variable warnings by forcing the compiler 1466 * to ``unregister'' variables 1467 */ 1468 #if __GNUC__ 1469 (void) &cp; 1470 (void) &line; 1471 #endif 1472 1473 /* 1474 * Skip to variable name 1475 */ 1476 while ((*line == ' ') || (*line == '\t')) { 1477 line++; 1478 } 1479 1480 /* 1481 * Skip to operator character, nulling out whitespace as we go 1482 */ 1483 for (cp = line + 1; *cp != '='; cp++) { 1484 if (isspace ((unsigned char)*cp)) { 1485 *cp = '\0'; 1486 } 1487 } 1488 opc = cp-1; /* operator is the previous character */ 1489 *cp++ = '\0'; /* nuke the = */ 1490 1491 /* 1492 * Check operator type 1493 */ 1494 switch (*opc) { 1495 case '+': 1496 type = VAR_APPEND; 1497 *opc = '\0'; 1498 break; 1499 1500 case '?': 1501 /* 1502 * If the variable already has a value, we don't do anything. 1503 */ 1504 *opc = '\0'; 1505 if (Var_Exists(line, ctxt)) { 1506 return; 1507 } else { 1508 type = VAR_NORMAL; 1509 } 1510 break; 1511 1512 case ':': 1513 type = VAR_SUBST; 1514 *opc = '\0'; 1515 break; 1516 1517 case '!': 1518 type = VAR_SHELL; 1519 *opc = '\0'; 1520 break; 1521 1522 default: 1523 #ifdef SUNSHCMD 1524 while (opc > line && *opc != ':') 1525 opc--; 1526 1527 if (strncmp(opc, ":sh", 3) == 0) { 1528 type = VAR_SHELL; 1529 *opc = '\0'; 1530 break; 1531 } 1532 #endif 1533 type = VAR_NORMAL; 1534 break; 1535 } 1536 1537 while (isspace ((unsigned char)*cp)) { 1538 cp++; 1539 } 1540 1541 if (type == VAR_APPEND) { 1542 Var_Append (line, cp, ctxt); 1543 } else if (type == VAR_SUBST) { 1544 /* 1545 * Allow variables in the old value to be undefined, but leave their 1546 * invocation alone -- this is done by forcing oldVars to be false. 1547 * XXX: This can cause recursive variables, but that's not hard to do, 1548 * and this allows someone to do something like 1549 * 1550 * CFLAGS = $(.INCLUDES) 1551 * CFLAGS := -I.. $(CFLAGS) 1552 * 1553 * And not get an error. 1554 */ 1555 Boolean oldOldVars = oldVars; 1556 1557 oldVars = FALSE; 1558 1559 /* 1560 * make sure that we set the variable the first time to nothing 1561 * so that it gets substituted! 1562 */ 1563 if (!Var_Exists(line, ctxt)) 1564 Var_Set(line, "", ctxt, 0); 1565 1566 cp = Var_Subst(NULL, cp, ctxt, FALSE); 1567 oldVars = oldOldVars; 1568 freeCp = TRUE; 1569 1570 Var_Set(line, cp, ctxt, 0); 1571 } else if (type == VAR_SHELL) { 1572 char *res, *err; 1573 1574 if (strchr(cp, '$') != NULL) { 1575 /* 1576 * There's a dollar sign in the command, so perform variable 1577 * expansion on the whole thing. The resulting string will need 1578 * freeing when we're done, so set freeCmd to TRUE. 1579 */ 1580 cp = Var_Subst(NULL, cp, VAR_CMD, TRUE); 1581 freeCp = TRUE; 1582 } 1583 1584 res = Cmd_Exec(cp, &err); 1585 Var_Set(line, res, ctxt, 0); 1586 free(res); 1587 1588 if (err) 1589 Parse_Error(PARSE_WARNING, err, cp); 1590 } else { 1591 /* 1592 * Normal assignment -- just do it. 1593 */ 1594 Var_Set(line, cp, ctxt, 0); 1595 } 1596 if (strcmp(line, MAKEOVERRIDES) == 0) 1597 Main_ExportMAKEFLAGS(FALSE); /* re-export MAKEFLAGS */ 1598 else if (strcmp(line, ".CURDIR") == 0) { 1599 /* 1600 * Somone is being (too?) clever... 1601 * Let's pretend they know what they are doing and 1602 * re-initialize the 'cur' Path. 1603 */ 1604 Dir_InitCur(cp); 1605 Dir_SetPATH(); 1606 } 1607 if (freeCp) 1608 free(cp); 1609 } 1610 1611 1612 /*- 1613 * ParseAddCmd -- 1614 * Lst_ForEach function to add a command line to all targets 1615 * 1616 * Input: 1617 * gnp the node to which the command is to be added 1618 * cmd the command to add 1619 * 1620 * Results: 1621 * Always 0 1622 * 1623 * Side Effects: 1624 * A new element is added to the commands list of the node. 1625 */ 1626 static int 1627 ParseAddCmd(ClientData gnp, ClientData cmd) 1628 { 1629 GNode *gn = (GNode *) gnp; 1630 /* if target already supplied, ignore commands */ 1631 if ((gn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (gn->cohorts)) 1632 gn = (GNode *) Lst_Datum (Lst_Last (gn->cohorts)); 1633 if (!(gn->type & OP_HAS_COMMANDS)) { 1634 (void)Lst_AtEnd(gn->commands, cmd); 1635 ParseMark(gn); 1636 } else { 1637 #ifdef notyet 1638 /* XXX: We cannot do this until we fix the tree */ 1639 (void)Lst_AtEnd(gn->commands, cmd); 1640 Parse_Error (PARSE_WARNING, 1641 "overriding commands for target \"%s\"; " 1642 "previous commands defined at %s: %d ignored", 1643 gn->name, gn->fname, gn->lineno); 1644 #else 1645 Parse_Error (PARSE_WARNING, 1646 "duplicate script for target \"%s\" ignored", 1647 gn->name); 1648 ParseErrorInternal (gn->fname, gn->lineno, PARSE_WARNING, 1649 "using previous script for \"%s\" defined here", 1650 gn->name); 1651 #endif 1652 } 1653 return(0); 1654 } 1655 1656 /*- 1657 *----------------------------------------------------------------------- 1658 * ParseHasCommands -- 1659 * Callback procedure for Parse_File when destroying the list of 1660 * targets on the last dependency line. Marks a target as already 1661 * having commands if it does, to keep from having shell commands 1662 * on multiple dependency lines. 1663 * 1664 * Input: 1665 * gnp Node to examine 1666 * 1667 * Results: 1668 * None 1669 * 1670 * Side Effects: 1671 * OP_HAS_COMMANDS may be set for the target. 1672 * 1673 *----------------------------------------------------------------------- 1674 */ 1675 static void 1676 ParseHasCommands(ClientData gnp) 1677 { 1678 GNode *gn = (GNode *) gnp; 1679 if (!Lst_IsEmpty(gn->commands)) { 1680 gn->type |= OP_HAS_COMMANDS; 1681 } 1682 } 1683 1684 /*- 1685 *----------------------------------------------------------------------- 1686 * Parse_AddIncludeDir -- 1687 * Add a directory to the path searched for included makefiles 1688 * bracketed by double-quotes. Used by functions in main.c 1689 * 1690 * Input: 1691 * dir The name of the directory to add 1692 * 1693 * Results: 1694 * None. 1695 * 1696 * Side Effects: 1697 * The directory is appended to the list. 1698 * 1699 *----------------------------------------------------------------------- 1700 */ 1701 void 1702 Parse_AddIncludeDir(char *dir) 1703 { 1704 (void) Dir_AddDir (parseIncPath, dir); 1705 } 1706 1707 /*- 1708 *--------------------------------------------------------------------- 1709 * ParseDoInclude -- 1710 * Push to another file. 1711 * 1712 * The input is the line minus the `.'. A file spec is a string 1713 * enclosed in <> or "". The former is looked for only in sysIncPath. 1714 * The latter in . and the directories specified by -I command line 1715 * options 1716 * 1717 * Results: 1718 * None 1719 * 1720 * Side Effects: 1721 * A structure is added to the includes Lst and readProc, lineno, 1722 * fname and curFILE are altered for the new file 1723 *--------------------------------------------------------------------- 1724 */ 1725 static void 1726 ParseDoInclude(char *line) 1727 { 1728 char *fullname; /* full pathname of file */ 1729 IFile *oldFile; /* state associated with current file */ 1730 char endc; /* the character which ends the file spec */ 1731 char *cp; /* current position in file spec */ 1732 Boolean isSystem; /* TRUE if makefile is a system makefile */ 1733 int silent = (*line != 'i') ? 1 : 0; 1734 char *file = &line[7 + silent]; 1735 1736 /* 1737 * Skip to delimiter character so we know where to look 1738 */ 1739 while ((*file == ' ') || (*file == '\t')) { 1740 file++; 1741 } 1742 1743 if ((*file != '"') && (*file != '<')) { 1744 Parse_Error (PARSE_FATAL, 1745 ".include filename must be delimited by '\"' or '<'"); 1746 return; 1747 } 1748 1749 /* 1750 * Set the search path on which to find the include file based on the 1751 * characters which bracket its name. Angle-brackets imply it's 1752 * a system Makefile while double-quotes imply it's a user makefile 1753 */ 1754 if (*file == '<') { 1755 isSystem = TRUE; 1756 endc = '>'; 1757 } else { 1758 isSystem = FALSE; 1759 endc = '"'; 1760 } 1761 1762 /* 1763 * Skip to matching delimiter 1764 */ 1765 for (cp = ++file; *cp && *cp != endc; cp++) { 1766 continue; 1767 } 1768 1769 if (*cp != endc) { 1770 Parse_Error (PARSE_FATAL, 1771 "Unclosed %cinclude filename. '%c' expected", 1772 '.', endc); 1773 return; 1774 } 1775 *cp = '\0'; 1776 1777 /* 1778 * Substitute for any variables in the file name before trying to 1779 * find the thing. 1780 */ 1781 file = Var_Subst (NULL, file, VAR_CMD, FALSE); 1782 1783 /* 1784 * Now we know the file's name and its search path, we attempt to 1785 * find the durn thing. A return of NULL indicates the file don't 1786 * exist. 1787 */ 1788 fullname = (char *)NULL; 1789 1790 if (!isSystem) { 1791 /* 1792 * Include files contained in double-quotes are first searched for 1793 * relative to the including file's location. We don't want to 1794 * cd there, of course, so we just tack on the old file's 1795 * leading path components and call Dir_FindFile to see if 1796 * we can locate the beast. 1797 */ 1798 char *prefEnd, *Fname; 1799 1800 /* Make a temporary copy of this, to be safe. */ 1801 Fname = estrdup(curFile.fname); 1802 1803 prefEnd = strrchr (Fname, '/'); 1804 if (prefEnd != (char *)NULL) { 1805 char *newName; 1806 1807 *prefEnd = '\0'; 1808 if (file[0] == '/') 1809 newName = estrdup(file); 1810 else 1811 newName = str_concat (Fname, file, STR_ADDSLASH); 1812 fullname = Dir_FindFile (newName, parseIncPath); 1813 if (fullname == (char *)NULL) { 1814 fullname = Dir_FindFile(newName, dirSearchPath); 1815 } 1816 free (newName); 1817 *prefEnd = '/'; 1818 } else { 1819 fullname = (char *)NULL; 1820 } 1821 free (Fname); 1822 if (fullname == (char *)NULL) { 1823 /* 1824 * Makefile wasn't found in same directory as included makefile. 1825 * Search for it first on the -I search path, 1826 * then on the .PATH search path, if not found in a -I directory. 1827 * XXX: Suffix specific? 1828 */ 1829 fullname = Dir_FindFile (file, parseIncPath); 1830 if (fullname == (char *)NULL) { 1831 fullname = Dir_FindFile(file, dirSearchPath); 1832 } 1833 } 1834 } 1835 1836 /* Looking for a system file or file still not found */ 1837 if (fullname == (char *)NULL) { 1838 /* 1839 * Look for it on the system path 1840 */ 1841 fullname = Dir_FindFile(file, Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath); 1842 } 1843 1844 if (fullname == (char *) NULL) { 1845 *cp = endc; 1846 if (!silent) 1847 Parse_Error (PARSE_FATAL, "Could not find %s", file); 1848 return; 1849 } 1850 1851 free(file); 1852 1853 /* 1854 * Once we find the absolute path to the file, we get to save all the 1855 * state from the current file before we can start reading this 1856 * include file. The state is stored in an IFile structure which 1857 * is placed on a list with other IFile structures. The list makes 1858 * a very nice stack to track how we got here... 1859 */ 1860 oldFile = (IFile *) emalloc (sizeof (IFile)); 1861 1862 memcpy(oldFile, &curFile, sizeof (IFile)); 1863 1864 (void) Lst_AtFront (includes, (ClientData)oldFile); 1865 1866 /* 1867 * Once the previous state has been saved, we can get down to reading 1868 * the new file. We set up the name of the file to be the absolute 1869 * name of the include file so error messages refer to the right 1870 * place. Naturally enough, we start reading at line number 0. 1871 */ 1872 curFile.fname = fullname; 1873 curFile.lineno = 0; 1874 1875 ParseSetParseFile(curFile.fname); 1876 1877 curFile.F = fopen (fullname, "r"); 1878 curFile.P = NULL; 1879 1880 if (curFile.F == (FILE * ) NULL) { 1881 if (!silent) 1882 Parse_Error (PARSE_FATAL, "Cannot open %s", fullname); 1883 /* 1884 * Pop to previous file 1885 */ 1886 (void) ParseEOF(0); 1887 } 1888 } 1889 1890 1891 /*- 1892 *--------------------------------------------------------------------- 1893 * ParseSetParseFile -- 1894 * Set the .PARSEDIR and .PARSEFILE variables to the dirname and 1895 * basename of the given filename 1896 * 1897 * Results: 1898 * None 1899 * 1900 * Side Effects: 1901 * The .PARSEDIR and .PARSEFILE variables are overwritten by the 1902 * dirname and basename of the given filename. 1903 *--------------------------------------------------------------------- 1904 */ 1905 static void 1906 ParseSetParseFile(char *filename) 1907 { 1908 char *slash; 1909 1910 slash = strrchr(filename, '/'); 1911 if (slash == 0) { 1912 Var_Set(".PARSEDIR", ".", VAR_GLOBAL, 0); 1913 Var_Set(".PARSEFILE", filename, VAR_GLOBAL, 0); 1914 } else { 1915 *slash = '\0'; 1916 Var_Set(".PARSEDIR", filename, VAR_GLOBAL, 0); 1917 Var_Set(".PARSEFILE", slash+1, VAR_GLOBAL, 0); 1918 *slash = '/'; 1919 } 1920 } 1921 1922 1923 /*- 1924 *--------------------------------------------------------------------- 1925 * Parse_FromString -- 1926 * Start Parsing from the given string 1927 * 1928 * Results: 1929 * None 1930 * 1931 * Side Effects: 1932 * A structure is added to the includes Lst and readProc, lineno, 1933 * fname and curFILE are altered for the new file 1934 *--------------------------------------------------------------------- 1935 */ 1936 void 1937 Parse_FromString(char *str) 1938 { 1939 IFile *oldFile; /* state associated with this file */ 1940 1941 if (DEBUG(FOR)) 1942 (void) fprintf(stderr, "%s\n----\n", str); 1943 1944 oldFile = (IFile *) emalloc (sizeof (IFile)); 1945 memcpy(oldFile, &curFile, sizeof (IFile)); 1946 1947 (void) Lst_AtFront (includes, (ClientData)oldFile); 1948 1949 curFile.F = NULL; 1950 curFile.P = (PTR *) emalloc (sizeof (PTR)); 1951 curFile.P->str = curFile.P->ptr = str; 1952 curFile.lineno = 0; 1953 curFile.fname = estrdup(curFile.fname); 1954 } 1955 1956 1957 #ifdef SYSVINCLUDE 1958 /*- 1959 *--------------------------------------------------------------------- 1960 * ParseTraditionalInclude -- 1961 * Push to another file. 1962 * 1963 * The input is the current line. The file name(s) are 1964 * following the "include". 1965 * 1966 * Results: 1967 * None 1968 * 1969 * Side Effects: 1970 * A structure is added to the includes Lst and readProc, lineno, 1971 * fname and curFILE are altered for the new file 1972 *--------------------------------------------------------------------- 1973 */ 1974 static void 1975 ParseTraditionalInclude(char *line) 1976 { 1977 char *fullname; /* full pathname of file */ 1978 IFile *oldFile; /* state associated with current file */ 1979 char *cp; /* current position in file spec */ 1980 char *prefEnd; 1981 int done = 0; 1982 int silent = (line[0] != 'i') ? 1 : 0; 1983 char *file = &line[silent + 7]; 1984 char *cfname; 1985 size_t clineno; 1986 1987 cfname = curFile.fname; 1988 clineno = curFile.lineno; 1989 1990 /* 1991 * Skip over whitespace 1992 */ 1993 while (isspace((unsigned char)*file)) 1994 file++; 1995 1996 if (*file == '\0') { 1997 Parse_Error (PARSE_FATAL, 1998 "Filename missing from \"include\""); 1999 return; 2000 } 2001 2002 for (; !done; file = cp + 1) { 2003 /* 2004 * Skip to end of line or next whitespace 2005 */ 2006 for (cp = file; *cp && !isspace((unsigned char) *cp); cp++) 2007 continue; 2008 2009 if (*cp) 2010 *cp = '\0'; 2011 else 2012 done = 1; 2013 2014 /* 2015 * Substitute for any variables in the file name before trying to 2016 * find the thing. 2017 */ 2018 file = Var_Subst(NULL, file, VAR_CMD, FALSE); 2019 2020 /* 2021 * Now we know the file's name, we attempt to find the durn thing. 2022 * A return of NULL indicates the file don't exist. 2023 * 2024 * Include files are first searched for relative to the including 2025 * file's location. We don't want to cd there, of course, so we 2026 * just tack on the old file's leading path components and call 2027 * Dir_FindFile to see if we can locate the beast. 2028 * XXX - this *does* search in the current directory, right? 2029 */ 2030 2031 prefEnd = strrchr(cfname, '/'); 2032 if (prefEnd != NULL) { 2033 char *newName; 2034 2035 *prefEnd = '\0'; 2036 newName = str_concat(cfname, file, STR_ADDSLASH); 2037 fullname = Dir_FindFile(newName, parseIncPath); 2038 if (fullname == NULL) { 2039 fullname = Dir_FindFile(newName, dirSearchPath); 2040 } 2041 free (newName); 2042 *prefEnd = '/'; 2043 } else { 2044 fullname = NULL; 2045 } 2046 2047 if (fullname == NULL) { 2048 /* 2049 * System makefile or makefile wasn't found in same directory as 2050 * included makefile. Search for it first on the -I search path, 2051 * then on the .PATH search path, if not found in a 2052 * -I directory. XXX: Suffix specific? 2053 */ 2054 fullname = Dir_FindFile(file, parseIncPath); 2055 if (fullname == NULL) { 2056 fullname = Dir_FindFile(file, dirSearchPath); 2057 } 2058 } 2059 2060 if (fullname == NULL) { 2061 /* 2062 * Still haven't found the makefile. Look for it on the system 2063 * path as a last resort. 2064 */ 2065 fullname = Dir_FindFile(file, 2066 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath); 2067 } 2068 2069 if (fullname == NULL) { 2070 if (!silent) 2071 ParseErrorInternal(cfname, clineno, PARSE_FATAL, 2072 "Could not find %s", file); 2073 free(file); 2074 continue; 2075 } 2076 2077 free(file); 2078 2079 /* 2080 * Once we find the absolute path to the file, we get to save all 2081 * the state from the current file before we can start reading this 2082 * include file. The state is stored in an IFile structure which 2083 * is placed on a list with other IFile structures. The list makes 2084 * a very nice stack to track how we got here... 2085 */ 2086 oldFile = (IFile *) emalloc(sizeof(IFile)); 2087 memcpy(oldFile, &curFile, sizeof (IFile)); 2088 2089 (void) Lst_AtFront(includes, (ClientData)oldFile); 2090 2091 /* 2092 * Once the previous state has been saved, we can get down to 2093 * reading the new file. We set up the name of the file to be the 2094 * absolute name of the include file so error messages refer to the 2095 * right place. Naturally enough, we start reading at line number 0. 2096 */ 2097 curFile.fname = fullname; 2098 curFile.lineno = 0; 2099 2100 curFile.F = fopen(fullname, "r"); 2101 curFile.P = NULL; 2102 2103 if (curFile.F == NULL) { 2104 if (!silent) 2105 ParseErrorInternal(cfname, clineno, PARSE_FATAL, 2106 "Cannot open %s", fullname); 2107 /* 2108 * Pop to previous file 2109 */ 2110 (void) ParseEOF(1); 2111 } 2112 } 2113 } 2114 #endif 2115 2116 /*- 2117 *--------------------------------------------------------------------- 2118 * ParseEOF -- 2119 * Called when EOF is reached in the current file. If we were reading 2120 * an include file, the includes stack is popped and things set up 2121 * to go back to reading the previous file at the previous location. 2122 * 2123 * Results: 2124 * CONTINUE if there's more to do. DONE if not. 2125 * 2126 * Side Effects: 2127 * The old curFILE, is closed. The includes list is shortened. 2128 * lineno, curFILE, and fname are changed if CONTINUE is returned. 2129 *--------------------------------------------------------------------- 2130 */ 2131 static int 2132 ParseEOF(int opened) 2133 { 2134 IFile *ifile; /* the state on the top of the includes stack */ 2135 2136 if (Lst_IsEmpty (includes)) { 2137 Var_Delete(".PARSEDIR", VAR_GLOBAL); 2138 Var_Delete(".PARSEFILE", VAR_GLOBAL); 2139 return (DONE); 2140 } 2141 2142 ifile = (IFile *) Lst_DeQueue (includes); 2143 2144 /* XXX dispose of curFile info */ 2145 free ((Address) curFile.fname); 2146 if (opened && curFile.F) 2147 (void) fclose (curFile.F); 2148 if (curFile.P) { 2149 free((Address) curFile.P->str); 2150 free((Address) curFile.P); 2151 } 2152 2153 memcpy(&curFile, ifile, sizeof (IFile)); 2154 2155 free ((Address)ifile); 2156 2157 /* pop the PARSEDIR/PARSEFILE variables */ 2158 ParseSetParseFile(curFile.fname); 2159 return (CONTINUE); 2160 } 2161 2162 /*- 2163 *--------------------------------------------------------------------- 2164 * ParseReadc -- 2165 * Read a character from the current file 2166 * 2167 * Results: 2168 * The character that was read 2169 * 2170 * Side Effects: 2171 *--------------------------------------------------------------------- 2172 */ 2173 static __inline int 2174 ParseReadc(void) 2175 { 2176 if (curFile.F) 2177 return fgetc(curFile.F); 2178 2179 if (curFile.P && *curFile.P->ptr) 2180 return *curFile.P->ptr++; 2181 return EOF; 2182 } 2183 2184 2185 /*- 2186 *--------------------------------------------------------------------- 2187 * ParseUnreadc -- 2188 * Put back a character to the current file 2189 * 2190 * Results: 2191 * None. 2192 * 2193 * Side Effects: 2194 *--------------------------------------------------------------------- 2195 */ 2196 static void 2197 ParseUnreadc(int c) 2198 { 2199 if (curFile.F) { 2200 ungetc(c, curFile.F); 2201 return; 2202 } 2203 if (curFile.P) { 2204 *--(curFile.P->ptr) = c; 2205 return; 2206 } 2207 } 2208 2209 2210 /* ParseSkipLine(): 2211 * Grab the next line 2212 * 2213 * Input: 2214 * skip Skip lines that don't start with . 2215 * 2216 */ 2217 static char * 2218 ParseSkipLine(int skip) 2219 { 2220 char *line; 2221 int c, lastc, lineLength = 0; 2222 Buffer buf; 2223 2224 buf = Buf_Init(MAKE_BSIZE); 2225 2226 do { 2227 Buf_Discard(buf, lineLength); 2228 lastc = '\0'; 2229 2230 while (((c = ParseReadc()) != '\n' || lastc == '\\') 2231 && c != EOF) { 2232 if (c == '\n') { 2233 Buf_ReplaceLastByte(buf, (Byte)' '); 2234 curFile.lineno++; 2235 2236 while ((c = ParseReadc()) == ' ' || c == '\t'); 2237 2238 if (c == EOF) 2239 break; 2240 } 2241 2242 Buf_AddByte(buf, (Byte)c); 2243 lastc = c; 2244 } 2245 2246 if (c == EOF) { 2247 Parse_Error(PARSE_FATAL, "Unclosed conditional/for loop"); 2248 Buf_Destroy(buf, TRUE); 2249 return((char *)NULL); 2250 } 2251 2252 curFile.lineno++; 2253 Buf_AddByte(buf, (Byte)'\0'); 2254 line = (char *)Buf_GetAll(buf, &lineLength); 2255 } while (skip == 1 && line[0] != '.'); 2256 2257 Buf_Destroy(buf, FALSE); 2258 return line; 2259 } 2260 2261 2262 /*- 2263 *--------------------------------------------------------------------- 2264 * ParseReadLine -- 2265 * Read an entire line from the input file. Called only by Parse_File. 2266 * To facilitate escaped newlines and what have you, a character is 2267 * buffered in 'lastc', which is '\0' when no characters have been 2268 * read. When we break out of the loop, c holds the terminating 2269 * character and lastc holds a character that should be added to 2270 * the line (unless we don't read anything but a terminator). 2271 * 2272 * Results: 2273 * A line w/o its newline 2274 * 2275 * Side Effects: 2276 * Only those associated with reading a character 2277 *--------------------------------------------------------------------- 2278 */ 2279 static char * 2280 ParseReadLine(void) 2281 { 2282 Buffer buf; /* Buffer for current line */ 2283 int c; /* the current character */ 2284 int lastc; /* The most-recent character */ 2285 Boolean semiNL; /* treat semi-colons as newlines */ 2286 Boolean ignDepOp; /* TRUE if should ignore dependency operators 2287 * for the purposes of setting semiNL */ 2288 Boolean ignComment; /* TRUE if should ignore comments (in a 2289 * shell command */ 2290 char *line; /* Result */ 2291 char *ep; /* to strip trailing blanks */ 2292 int lineLength; /* Length of result */ 2293 2294 semiNL = FALSE; 2295 ignDepOp = FALSE; 2296 ignComment = FALSE; 2297 2298 /* 2299 * Handle special-characters at the beginning of the line. Either a 2300 * leading tab (shell command) or pound-sign (possible conditional) 2301 * forces us to ignore comments and dependency operators and treat 2302 * semi-colons as semi-colons (by leaving semiNL FALSE). This also 2303 * discards completely blank lines. 2304 */ 2305 for (;;) { 2306 c = ParseReadc(); 2307 2308 if (c == '\t') { 2309 ignComment = ignDepOp = TRUE; 2310 break; 2311 } else if (c == '\n') { 2312 curFile.lineno++; 2313 } else if (c == '#') { 2314 ParseUnreadc(c); 2315 break; 2316 } else { 2317 /* 2318 * Anything else breaks out without doing anything 2319 */ 2320 break; 2321 } 2322 } 2323 2324 if (c != EOF) { 2325 lastc = c; 2326 buf = Buf_Init(MAKE_BSIZE); 2327 2328 while (((c = ParseReadc ()) != '\n' || (lastc == '\\')) && 2329 (c != EOF)) 2330 { 2331 test_char: 2332 switch(c) { 2333 case '\n': 2334 /* 2335 * Escaped newline: read characters until a non-space or an 2336 * unescaped newline and replace them all by a single space. 2337 * This is done by storing the space over the backslash and 2338 * dropping through with the next nonspace. If it is a 2339 * semi-colon and semiNL is TRUE, it will be recognized as a 2340 * newline in the code below this... 2341 */ 2342 curFile.lineno++; 2343 lastc = ' '; 2344 while ((c = ParseReadc ()) == ' ' || c == '\t') { 2345 continue; 2346 } 2347 if (c == EOF || c == '\n') { 2348 goto line_read; 2349 } else { 2350 /* 2351 * Check for comments, semiNL's, etc. -- easier than 2352 * ParseUnreadc(c); continue; 2353 */ 2354 goto test_char; 2355 } 2356 /*NOTREACHED*/ 2357 break; 2358 2359 case ';': 2360 /* 2361 * Semi-colon: Need to see if it should be interpreted as a 2362 * newline 2363 */ 2364 if (semiNL) { 2365 /* 2366 * To make sure the command that may be following this 2367 * semi-colon begins with a tab, we push one back into the 2368 * input stream. This will overwrite the semi-colon in the 2369 * buffer. If there is no command following, this does no 2370 * harm, since the newline remains in the buffer and the 2371 * whole line is ignored. 2372 */ 2373 ParseUnreadc('\t'); 2374 goto line_read; 2375 } 2376 break; 2377 case '=': 2378 if (!semiNL) { 2379 /* 2380 * Haven't seen a dependency operator before this, so this 2381 * must be a variable assignment -- don't pay attention to 2382 * dependency operators after this. 2383 */ 2384 ignDepOp = TRUE; 2385 } else if (lastc == ':' || lastc == '!') { 2386 /* 2387 * Well, we've seen a dependency operator already, but it 2388 * was the previous character, so this is really just an 2389 * expanded variable assignment. Revert semi-colons to 2390 * being just semi-colons again and ignore any more 2391 * dependency operators. 2392 * 2393 * XXX: Note that a line like "foo : a:=b" will blow up, 2394 * but who'd write a line like that anyway? 2395 */ 2396 ignDepOp = TRUE; semiNL = FALSE; 2397 } 2398 break; 2399 case '#': 2400 if (!ignComment) { 2401 if ( 2402 #if 0 2403 compatMake && 2404 #endif 2405 (lastc != '\\')) { 2406 /* 2407 * If the character is a hash mark and it isn't escaped 2408 * (or we're being compatible), the thing is a comment. 2409 * Skip to the end of the line. 2410 */ 2411 do { 2412 c = ParseReadc(); 2413 } while ((c != '\n') && (c != EOF)); 2414 goto line_read; 2415 } else { 2416 /* 2417 * Don't add the backslash. Just let the # get copied 2418 * over. 2419 */ 2420 lastc = c; 2421 continue; 2422 } 2423 } 2424 break; 2425 case ':': 2426 case '!': 2427 if (!ignDepOp && (c == ':' || c == '!')) { 2428 /* 2429 * A semi-colon is recognized as a newline only on 2430 * dependency lines. Dependency lines are lines with a 2431 * colon or an exclamation point. Ergo... 2432 */ 2433 semiNL = TRUE; 2434 } 2435 break; 2436 } 2437 /* 2438 * Copy in the previous character and save this one in lastc. 2439 */ 2440 Buf_AddByte (buf, (Byte)lastc); 2441 lastc = c; 2442 2443 } 2444 line_read: 2445 curFile.lineno++; 2446 2447 if (lastc != '\0') { 2448 Buf_AddByte (buf, (Byte)lastc); 2449 } 2450 Buf_AddByte (buf, (Byte)'\0'); 2451 line = (char *)Buf_GetAll (buf, &lineLength); 2452 Buf_Destroy (buf, FALSE); 2453 2454 /* 2455 * Strip trailing blanks and tabs from the line. 2456 * Do not strip a blank or tab that is preceded by 2457 * a '\' 2458 */ 2459 ep = line; 2460 while (*ep) 2461 ++ep; 2462 while (ep > line + 1 && (ep[-1] == ' ' || ep[-1] == '\t')) { 2463 if (ep > line + 1 && ep[-2] == '\\') 2464 break; 2465 --ep; 2466 } 2467 *ep = 0; 2468 2469 if (line[0] == '.') { 2470 /* 2471 * The line might be a conditional. Ask the conditional module 2472 * about it and act accordingly 2473 */ 2474 switch (Cond_Eval (line)) { 2475 case COND_SKIP: 2476 /* 2477 * Skip to next conditional that evaluates to COND_PARSE. 2478 */ 2479 do { 2480 free (line); 2481 line = ParseSkipLine(1); 2482 } while (line && Cond_Eval(line) != COND_PARSE); 2483 if (line == NULL) 2484 break; 2485 /*FALLTHRU*/ 2486 case COND_PARSE: 2487 free ((Address) line); 2488 line = ParseReadLine(); 2489 break; 2490 case COND_INVALID: 2491 if (For_Eval(line)) { 2492 int ok; 2493 free(line); 2494 do { 2495 /* 2496 * Skip after the matching end 2497 */ 2498 line = ParseSkipLine(0); 2499 if (line == NULL) { 2500 Parse_Error (PARSE_FATAL, 2501 "Unexpected end of file in for loop.\n"); 2502 break; 2503 } 2504 ok = For_Eval(line); 2505 free(line); 2506 } 2507 while (ok); 2508 if (line != NULL) 2509 For_Run(); 2510 line = ParseReadLine(); 2511 } 2512 break; 2513 } 2514 } 2515 return (line); 2516 2517 } else { 2518 /* 2519 * Hit end-of-file, so return a NULL line to indicate this. 2520 */ 2521 return((char *)NULL); 2522 } 2523 } 2524 2525 /*- 2526 *----------------------------------------------------------------------- 2527 * ParseFinishLine -- 2528 * Handle the end of a dependency group. 2529 * 2530 * Results: 2531 * Nothing. 2532 * 2533 * Side Effects: 2534 * inLine set FALSE. 'targets' list destroyed. 2535 * 2536 *----------------------------------------------------------------------- 2537 */ 2538 static void 2539 ParseFinishLine(void) 2540 { 2541 if (inLine) { 2542 Lst_ForEach(targets, Suff_EndTransform, (ClientData)NULL); 2543 Lst_Destroy (targets, ParseHasCommands); 2544 targets = NULL; 2545 inLine = FALSE; 2546 } 2547 } 2548 2549 2550 /*- 2551 *--------------------------------------------------------------------- 2552 * Parse_File -- 2553 * Parse a file into its component parts, incorporating it into the 2554 * current dependency graph. This is the main function and controls 2555 * almost every other function in this module 2556 * 2557 * Input: 2558 * name the name of the file being read 2559 * stream Stream open to makefile to parse 2560 * 2561 * Results: 2562 * None 2563 * 2564 * Side Effects: 2565 * Loads. Nodes are added to the list of all targets, nodes and links 2566 * are added to the dependency graph. etc. etc. etc. 2567 *--------------------------------------------------------------------- 2568 */ 2569 void 2570 Parse_File(char *name, FILE *stream) 2571 { 2572 char *cp, /* pointer into the line */ 2573 *line; /* the line we're working on */ 2574 2575 inLine = FALSE; 2576 fatals = 0; 2577 2578 curFile.fname = name; 2579 curFile.F = stream; 2580 curFile.lineno = 0; 2581 2582 ParseSetParseFile(curFile.fname); 2583 2584 do { 2585 while ((line = ParseReadLine ()) != NULL) { 2586 if (*line == '.') { 2587 /* 2588 * Lines that begin with the special character are either 2589 * include or undef directives. 2590 */ 2591 for (cp = line + 1; isspace ((unsigned char)*cp); cp++) { 2592 continue; 2593 } 2594 if (strncmp(cp, "include", 7) == 0 || 2595 ((cp[0] == 's' || cp[0] == '-') && 2596 strncmp(&cp[1], "include", 7) == 0)) { 2597 ParseDoInclude (cp); 2598 goto nextLine; 2599 } else if (strncmp(cp, "undef", 5) == 0) { 2600 char *cp2; 2601 for (cp += 5; isspace((unsigned char) *cp); cp++) { 2602 continue; 2603 } 2604 2605 for (cp2 = cp; !isspace((unsigned char) *cp2) && 2606 (*cp2 != '\0'); cp2++) { 2607 continue; 2608 } 2609 2610 *cp2 = '\0'; 2611 2612 Var_Delete(cp, VAR_GLOBAL); 2613 goto nextLine; 2614 } 2615 } 2616 if (*line == '#') { 2617 /* If we're this far, the line must be a comment. */ 2618 goto nextLine; 2619 } 2620 2621 if (*line == '\t') { 2622 /* 2623 * If a line starts with a tab, it can only hope to be 2624 * a creation command. 2625 */ 2626 #ifndef POSIX 2627 shellCommand: 2628 #endif 2629 for (cp = line + 1; isspace ((unsigned char)*cp); cp++) { 2630 continue; 2631 } 2632 if (*cp) { 2633 if (inLine) { 2634 /* 2635 * So long as it's not a blank line and we're actually 2636 * in a dependency spec, add the command to the list of 2637 * commands of all targets in the dependency spec 2638 */ 2639 Lst_ForEach (targets, ParseAddCmd, cp); 2640 #ifdef CLEANUP 2641 Lst_AtEnd(targCmds, (ClientData) line); 2642 #endif 2643 continue; 2644 } else { 2645 Parse_Error (PARSE_FATAL, 2646 "Unassociated shell command \"%s\"", 2647 cp); 2648 } 2649 } 2650 #ifdef SYSVINCLUDE 2651 } else if (((strncmp(line, "include", 7) == 0 && 2652 isspace((unsigned char) line[7])) || 2653 ((line[0] == 's' || line[0] == '-') && 2654 strncmp(&line[1], "include", 7) == 0 && 2655 isspace((unsigned char) line[8]))) && 2656 strchr(line, ':') == NULL) { 2657 /* 2658 * It's an S3/S5-style "include". 2659 */ 2660 ParseTraditionalInclude (line); 2661 goto nextLine; 2662 #endif 2663 } else if (Parse_IsVar (line)) { 2664 ParseFinishLine(); 2665 Parse_DoVar (line, VAR_GLOBAL); 2666 } else { 2667 /* 2668 * We now know it's a dependency line so it needs to have all 2669 * variables expanded before being parsed. Tell the variable 2670 * module to complain if some variable is undefined... 2671 * To make life easier on novices, if the line is indented we 2672 * first make sure the line has a dependency operator in it. 2673 * If it doesn't have an operator and we're in a dependency 2674 * line's script, we assume it's actually a shell command 2675 * and add it to the current list of targets. 2676 */ 2677 #ifndef POSIX 2678 Boolean nonSpace = FALSE; 2679 #endif 2680 2681 cp = line; 2682 if (isspace((unsigned char) line[0])) { 2683 while ((*cp != '\0') && isspace((unsigned char) *cp)) { 2684 cp++; 2685 } 2686 if (*cp == '\0') { 2687 goto nextLine; 2688 } 2689 #ifndef POSIX 2690 while (*cp && (ParseIsEscaped(line, cp) || 2691 (*cp != ':') && (*cp != '!'))) { 2692 nonSpace = TRUE; 2693 cp++; 2694 } 2695 #endif 2696 } 2697 2698 #ifndef POSIX 2699 if (*cp == '\0') { 2700 if (inLine) { 2701 Parse_Error (PARSE_WARNING, 2702 "Shell command needs a leading tab"); 2703 goto shellCommand; 2704 } else if (nonSpace) { 2705 Parse_Error (PARSE_FATAL, "Missing operator"); 2706 } 2707 } else { 2708 #endif 2709 ParseFinishLine(); 2710 2711 cp = Var_Subst (NULL, line, VAR_CMD, TRUE); 2712 free (line); 2713 line = cp; 2714 2715 /* 2716 * Need a non-circular list for the target nodes 2717 */ 2718 if (targets) 2719 Lst_Destroy(targets, NOFREE); 2720 2721 targets = Lst_Init (FALSE); 2722 inLine = TRUE; 2723 2724 ParseDoDependency (line); 2725 #ifndef POSIX 2726 } 2727 #endif 2728 } 2729 2730 nextLine: 2731 2732 free (line); 2733 } 2734 /* 2735 * Reached EOF, but it may be just EOF of an include file... 2736 */ 2737 } while (ParseEOF(1) == CONTINUE); 2738 2739 /* 2740 * Make sure conditionals are clean 2741 */ 2742 Cond_End(); 2743 2744 if (fatals) { 2745 (void)fprintf(stderr, 2746 "%s: Fatal errors encountered -- cannot continue\n", 2747 progname); 2748 PrintOnError(NULL); 2749 exit (1); 2750 } 2751 } 2752 2753 /*- 2754 *--------------------------------------------------------------------- 2755 * Parse_Init -- 2756 * initialize the parsing module 2757 * 2758 * Results: 2759 * none 2760 * 2761 * Side Effects: 2762 * the parseIncPath list is initialized... 2763 *--------------------------------------------------------------------- 2764 */ 2765 void 2766 Parse_Init(void) 2767 { 2768 mainNode = NILGNODE; 2769 parseIncPath = Lst_Init (FALSE); 2770 sysIncPath = Lst_Init (FALSE); 2771 defIncPath = Lst_Init (FALSE); 2772 includes = Lst_Init (FALSE); 2773 #ifdef CLEANUP 2774 targCmds = Lst_Init (FALSE); 2775 #endif 2776 } 2777 2778 void 2779 Parse_End(void) 2780 { 2781 #ifdef CLEANUP 2782 Lst_Destroy(targCmds, (void (*)(ClientData))) free; 2783 if (targets) 2784 Lst_Destroy(targets, NOFREE); 2785 Lst_Destroy(defIncPath, Dir_Destroy); 2786 Lst_Destroy(sysIncPath, Dir_Destroy); 2787 Lst_Destroy(parseIncPath, Dir_Destroy); 2788 Lst_Destroy(includes, NOFREE); /* Should be empty now */ 2789 #endif 2790 } 2791 2792 2793 /*- 2794 *----------------------------------------------------------------------- 2795 * Parse_MainName -- 2796 * Return a Lst of the main target to create for main()'s sake. If 2797 * no such target exists, we Punt with an obnoxious error message. 2798 * 2799 * Results: 2800 * A Lst of the single node to create. 2801 * 2802 * Side Effects: 2803 * None. 2804 * 2805 *----------------------------------------------------------------------- 2806 */ 2807 Lst 2808 Parse_MainName(void) 2809 { 2810 Lst mainList; /* result list */ 2811 2812 mainList = Lst_Init (FALSE); 2813 2814 if (mainNode == NILGNODE) { 2815 Punt ("no target to make."); 2816 /*NOTREACHED*/ 2817 } else if (mainNode->type & OP_DOUBLEDEP) { 2818 (void) Lst_AtEnd (mainList, (ClientData)mainNode); 2819 Lst_Concat(mainList, mainNode->cohorts, LST_CONCNEW); 2820 } 2821 else 2822 (void) Lst_AtEnd (mainList, (ClientData)mainNode); 2823 Var_Append(".TARGETS", mainNode->name, VAR_GLOBAL); 2824 return (mainList); 2825 } 2826 2827 /*- 2828 *----------------------------------------------------------------------- 2829 * ParseMark -- 2830 * Add the filename and lineno to the GNode so that we remember 2831 * where it was first defined. 2832 * 2833 * Side Effects: 2834 * None. 2835 * 2836 *----------------------------------------------------------------------- 2837 */ 2838 static void 2839 ParseMark(GNode *gn) 2840 { 2841 gn->fname = strdup(curFile.fname); 2842 gn->lineno = curFile.lineno; 2843 } 2844