1 /* $NetBSD: parse.c,v 1.83 2002/03/20 18:10:31 pk 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 1.83 2002/03/20 18:10:31 pk 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 1.83 2002/03/20 18:10:31 pk 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 #ifdef __STDC__ 97 #include <stdarg.h> 98 #else 99 #include <varargs.h> 100 #endif 101 #include <stdio.h> 102 #include <ctype.h> 103 #include <errno.h> 104 #include "make.h" 105 #include "hash.h" 106 #include "dir.h" 107 #include "job.h" 108 #include "buf.h" 109 #include "pathnames.h" 110 111 /* 112 * These values are returned by ParseEOF to tell Parse_File whether to 113 * CONTINUE parsing, i.e. it had only reached the end of an include file, 114 * or if it's DONE. 115 */ 116 #define CONTINUE 1 117 #define DONE 0 118 static Lst targets; /* targets we're working on */ 119 #ifdef CLEANUP 120 static Lst targCmds; /* command lines for targets */ 121 #endif 122 static Boolean inLine; /* true if currently in a dependency 123 * line or its commands */ 124 typedef struct { 125 char *str; 126 char *ptr; 127 } PTR; 128 129 static int fatals = 0; 130 131 static GNode *mainNode; /* The main target to create. This is the 132 * first target on the first dependency 133 * line in the first makefile */ 134 typedef struct IFile { 135 char *fname; /* name of previous file */ 136 int lineno; /* saved line number */ 137 FILE * F; /* the open stream */ 138 PTR * P; /* the char pointer */ 139 } IFile; 140 141 static IFile curFile; 142 143 144 /* 145 * Definitions for handling #include specifications 146 */ 147 148 static Lst includes; /* stack of IFiles generated by 149 * #includes */ 150 Lst parseIncPath; /* list of directories for "..." includes */ 151 Lst sysIncPath; /* list of directories for <...> includes */ 152 Lst defIncPath; /* default directories for <...> includes */ 153 154 /*- 155 * specType contains the SPECial TYPE of the current target. It is 156 * Not if the target is unspecial. If it *is* special, however, the children 157 * are linked as children of the parent but not vice versa. This variable is 158 * set in ParseDoDependency 159 */ 160 typedef enum { 161 Begin, /* .BEGIN */ 162 Default, /* .DEFAULT */ 163 End, /* .END */ 164 Ignore, /* .IGNORE */ 165 Includes, /* .INCLUDES */ 166 Interrupt, /* .INTERRUPT */ 167 Libs, /* .LIBS */ 168 MFlags, /* .MFLAGS or .MAKEFLAGS */ 169 Main, /* .MAIN and we don't have anything user-specified to 170 * make */ 171 NoExport, /* .NOEXPORT */ 172 NoPath, /* .NOPATH */ 173 Not, /* Not special */ 174 NotParallel, /* .NOTPARALLEL */ 175 Null, /* .NULL */ 176 ExObjdir, /* .OBJDIR */ 177 Order, /* .ORDER */ 178 Parallel, /* .PARALLEL */ 179 ExPath, /* .PATH */ 180 Phony, /* .PHONY */ 181 #ifdef POSIX 182 Posix, /* .POSIX */ 183 #endif 184 Precious, /* .PRECIOUS */ 185 ExShell, /* .SHELL */ 186 Silent, /* .SILENT */ 187 SingleShell, /* .SINGLESHELL */ 188 Suffixes, /* .SUFFIXES */ 189 Wait, /* .WAIT */ 190 Attribute /* Generic attribute */ 191 } ParseSpecial; 192 193 static ParseSpecial specType; 194 static int waiting; 195 196 #define LPAREN '(' 197 #define RPAREN ')' 198 /* 199 * Predecessor node for handling .ORDER. Initialized to NILGNODE when .ORDER 200 * seen, then set to each successive source on the line. 201 */ 202 static GNode *predecessor; 203 204 /* 205 * The parseKeywords table is searched using binary search when deciding 206 * if a target or source is special. The 'spec' field is the ParseSpecial 207 * type of the keyword ("Not" if the keyword isn't special as a target) while 208 * the 'op' field is the operator to apply to the list of targets if the 209 * keyword is used as a source ("0" if the keyword isn't special as a source) 210 */ 211 static struct { 212 char *name; /* Name of keyword */ 213 ParseSpecial spec; /* Type when used as a target */ 214 int op; /* Operator when used as a source */ 215 } parseKeywords[] = { 216 { ".BEGIN", Begin, 0 }, 217 { ".DEFAULT", Default, 0 }, 218 { ".END", End, 0 }, 219 { ".EXEC", Attribute, OP_EXEC }, 220 { ".IGNORE", Ignore, OP_IGNORE }, 221 { ".INCLUDES", Includes, 0 }, 222 { ".INTERRUPT", Interrupt, 0 }, 223 { ".INVISIBLE", Attribute, OP_INVISIBLE }, 224 { ".JOIN", Attribute, OP_JOIN }, 225 { ".LIBS", Libs, 0 }, 226 { ".MADE", Attribute, OP_MADE }, 227 { ".MAIN", Main, 0 }, 228 { ".MAKE", Attribute, OP_MAKE }, 229 { ".MAKEFLAGS", MFlags, 0 }, 230 { ".MFLAGS", MFlags, 0 }, 231 { ".NOPATH", NoPath, OP_NOPATH }, 232 { ".NOTMAIN", Attribute, OP_NOTMAIN }, 233 { ".NOTPARALLEL", NotParallel, 0 }, 234 { ".NO_PARALLEL", NotParallel, 0 }, 235 { ".NULL", Null, 0 }, 236 { ".OBJDIR", ExObjdir, 0 }, 237 { ".OPTIONAL", Attribute, OP_OPTIONAL }, 238 { ".ORDER", Order, 0 }, 239 { ".PARALLEL", Parallel, 0 }, 240 { ".PATH", ExPath, 0 }, 241 { ".PHONY", Phony, OP_PHONY }, 242 #ifdef POSIX 243 { ".POSIX", Posix, 0 }, 244 #endif 245 { ".PRECIOUS", Precious, OP_PRECIOUS }, 246 { ".RECURSIVE", Attribute, OP_MAKE }, 247 { ".SHELL", ExShell, 0 }, 248 { ".SILENT", Silent, OP_SILENT }, 249 { ".SINGLESHELL", SingleShell, 0 }, 250 { ".SUFFIXES", Suffixes, 0 }, 251 { ".USE", Attribute, OP_USE }, 252 { ".USEBEFORE", Attribute, OP_USEBEFORE }, 253 { ".WAIT", Wait, 0 }, 254 }; 255 256 static int ParseIsEscaped __P((const char *, const char *)); 257 static void ParseErrorInternal __P((char *, size_t, int, char *, ...)) 258 __attribute__((__format__(__printf__, 4, 5))); 259 static void ParseVErrorInternal __P((char *, size_t, int, char *, va_list)) 260 __attribute__((__format__(__printf__, 4, 0))); 261 static int ParseFindKeyword __P((char *)); 262 static int ParseLinkSrc __P((ClientData, ClientData)); 263 static int ParseDoOp __P((ClientData, ClientData)); 264 static int ParseAddDep __P((ClientData, ClientData)); 265 static void ParseDoSrc __P((int, char *, Lst)); 266 static int ParseFindMain __P((ClientData, ClientData)); 267 static int ParseAddDir __P((ClientData, ClientData)); 268 static int ParseClearPath __P((ClientData, ClientData)); 269 static void ParseDoDependency __P((char *)); 270 static int ParseAddCmd __P((ClientData, ClientData)); 271 static __inline int ParseReadc __P((void)); 272 static void ParseUnreadc __P((int)); 273 static void ParseHasCommands __P((ClientData)); 274 static void ParseDoInclude __P((char *)); 275 static void ParseSetParseFile __P((char *)); 276 #ifdef SYSVINCLUDE 277 static void ParseTraditionalInclude __P((char *)); 278 #endif 279 static int ParseEOF __P((int)); 280 static char *ParseReadLine __P((void)); 281 static char *ParseSkipLine __P((int)); 282 static void ParseFinishLine __P((void)); 283 static void ParseMark __P((GNode *)); 284 285 extern int maxJobs; 286 287 288 /*- 289 *---------------------------------------------------------------------- 290 * ParseIsEscaped -- 291 * Check if the current character is escaped on the current line 292 * 293 * Results: 294 * 0 if the character is not backslash escaped, 1 otherwise 295 * 296 * Side Effects: 297 * None 298 *---------------------------------------------------------------------- 299 */ 300 static int 301 ParseIsEscaped(line, c) 302 const char *line, *c; 303 { 304 int active = 0; 305 for (;;) { 306 if (line == c) 307 return active; 308 if (*--c != '\\') 309 return active; 310 active = !active; 311 } 312 } 313 314 /*- 315 *---------------------------------------------------------------------- 316 * ParseFindKeyword -- 317 * Look in the table of keywords for one matching the given string. 318 * 319 * Results: 320 * The index of the keyword, or -1 if it isn't there. 321 * 322 * Side Effects: 323 * None 324 *---------------------------------------------------------------------- 325 */ 326 static int 327 ParseFindKeyword (str) 328 char *str; /* String to find */ 329 { 330 register int start, 331 end, 332 cur; 333 register int diff; 334 335 start = 0; 336 end = (sizeof(parseKeywords)/sizeof(parseKeywords[0])) - 1; 337 338 do { 339 cur = start + ((end - start) / 2); 340 diff = strcmp (str, parseKeywords[cur].name); 341 342 if (diff == 0) { 343 return (cur); 344 } else if (diff < 0) { 345 end = cur - 1; 346 } else { 347 start = cur + 1; 348 } 349 } while (start <= end); 350 return (-1); 351 } 352 353 /*- 354 * ParseVErrorInternal -- 355 * Error message abort function for parsing. Prints out the context 356 * of the error (line number and file) as well as the message with 357 * two optional arguments. 358 * 359 * Results: 360 * None 361 * 362 * Side Effects: 363 * "fatals" is incremented if the level is PARSE_FATAL. 364 */ 365 /* VARARGS */ 366 static void 367 #ifdef __STDC__ 368 ParseVErrorInternal(char *cfname, size_t clineno, int type, char *fmt, 369 va_list ap) 370 #else 371 ParseVErrorInternal(va_alist) 372 va_dcl 373 #endif 374 { 375 static Boolean fatal_warning_error_printed = FALSE; 376 377 (void)fprintf(stderr, "%s: \"", progname); 378 379 if (*cfname != '/') { 380 char *cp, *dir; 381 382 /* 383 * Nothing is more anoying than not knowing which Makefile 384 * is the culprit. 385 */ 386 dir = Var_Value(".PARSEDIR", VAR_GLOBAL, &cp); 387 if (dir == NULL || *dir == '\0' || 388 (*dir == '.' && dir[1] == '\0')) 389 dir = Var_Value(".CURDIR", VAR_GLOBAL, &cp); 390 if (dir == NULL) 391 dir = "."; 392 393 (void)fprintf(stderr, "%s/%s", dir, cfname); 394 } else 395 (void)fprintf(stderr, "%s", cfname); 396 397 (void)fprintf(stderr, "\" line %d: ", (int)clineno); 398 if (type == PARSE_WARNING) 399 (void)fprintf(stderr, "warning: "); 400 (void)vfprintf(stderr, fmt, ap); 401 (void)fprintf(stderr, "\n"); 402 (void)fflush(stderr); 403 if (type == PARSE_FATAL || parseWarnFatal) 404 fatals += 1; 405 if (parseWarnFatal && !fatal_warning_error_printed) { 406 Error("parsing warnings being treated as errors"); 407 fatal_warning_error_printed = TRUE; 408 } 409 } 410 411 /*- 412 * ParseErrorInternal -- 413 * Error function 414 * 415 * Results: 416 * None 417 * 418 * Side Effects: 419 * None 420 */ 421 /* VARARGS */ 422 static void 423 #ifdef __STDC__ 424 ParseErrorInternal(char *cfname, size_t clineno, int type, char *fmt, ...) 425 #else 426 ParseErrorInternal(va_alist) 427 va_dcl 428 #endif 429 { 430 va_list ap; 431 #ifdef __STDC__ 432 va_start(ap, fmt); 433 #else 434 int type; /* Error type (PARSE_WARNING, PARSE_FATAL) */ 435 char *fmt; 436 char *cfname; 437 size_t clineno; 438 439 va_start(ap); 440 cfname = va_arg(ap, char *); 441 clineno = va_arg(ap, size_t); 442 type = va_arg(ap, int); 443 fmt = va_arg(ap, char *); 444 #endif 445 446 ParseVErrorInternal(cfname, clineno, type, fmt, ap); 447 va_end(ap); 448 } 449 450 /*- 451 * Parse_Error -- 452 * External interface to ParseErrorInternal; uses the default filename 453 * Line number. 454 * 455 * Results: 456 * None 457 * 458 * Side Effects: 459 * None 460 */ 461 /* VARARGS */ 462 void 463 #ifdef __STDC__ 464 Parse_Error(int type, char *fmt, ...) 465 #else 466 Parse_Error(va_alist) 467 va_dcl 468 #endif 469 { 470 va_list ap; 471 #ifdef __STDC__ 472 va_start(ap, fmt); 473 #else 474 int type; /* Error type (PARSE_WARNING, PARSE_FATAL) */ 475 char *fmt; 476 477 va_start(ap); 478 type = va_arg(ap, int); 479 fmt = va_arg(ap, char *); 480 #endif 481 ParseVErrorInternal(curFile.fname, curFile.lineno, type, fmt, ap); 482 va_end(ap); 483 } 484 485 /*- 486 *--------------------------------------------------------------------- 487 * ParseLinkSrc -- 488 * Link the parent node to its new child. Used in a Lst_ForEach by 489 * ParseDoDependency. If the specType isn't 'Not', the parent 490 * isn't linked as a parent of the child. 491 * 492 * Results: 493 * Always = 0 494 * 495 * Side Effects: 496 * New elements are added to the parents list of cgn and the 497 * children list of cgn. the unmade field of pgn is updated 498 * to reflect the additional child. 499 *--------------------------------------------------------------------- 500 */ 501 static int 502 ParseLinkSrc (pgnp, cgnp) 503 ClientData pgnp; /* The parent node */ 504 ClientData cgnp; /* The child node */ 505 { 506 GNode *pgn = (GNode *) pgnp; 507 GNode *cgn = (GNode *) cgnp; 508 509 if ((pgn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (pgn->cohorts)) 510 pgn = (GNode *) Lst_Datum (Lst_Last (pgn->cohorts)); 511 (void)Lst_AtEnd (pgn->children, (ClientData)cgn); 512 if (specType == Not) 513 (void)Lst_AtEnd (cgn->parents, (ClientData)pgn); 514 pgn->unmade += 1; 515 return (0); 516 } 517 518 /*- 519 *--------------------------------------------------------------------- 520 * ParseDoOp -- 521 * Apply the parsed operator to the given target node. Used in a 522 * Lst_ForEach call by ParseDoDependency once all targets have 523 * been found and their operator parsed. If the previous and new 524 * operators are incompatible, a major error is taken. 525 * 526 * Results: 527 * Always 0 528 * 529 * Side Effects: 530 * The type field of the node is altered to reflect any new bits in 531 * the op. 532 *--------------------------------------------------------------------- 533 */ 534 static int 535 ParseDoOp (gnp, opp) 536 ClientData gnp; /* The node to which the operator is to be 537 * applied */ 538 ClientData opp; /* The operator to apply */ 539 { 540 GNode *gn = (GNode *) gnp; 541 int op = *(int *) opp; 542 /* 543 * If the dependency mask of the operator and the node don't match and 544 * the node has actually had an operator applied to it before, and 545 * the operator actually has some dependency information in it, complain. 546 */ 547 if (((op & OP_OPMASK) != (gn->type & OP_OPMASK)) && 548 !OP_NOP(gn->type) && !OP_NOP(op)) 549 { 550 Parse_Error (PARSE_FATAL, "Inconsistent operator for %s", gn->name); 551 return (1); 552 } 553 554 if ((op == OP_DOUBLEDEP) && ((gn->type & OP_OPMASK) == OP_DOUBLEDEP)) { 555 /* 556 * If the node was the object of a :: operator, we need to create a 557 * new instance of it for the children and commands on this dependency 558 * line. The new instance is placed on the 'cohorts' list of the 559 * initial one (note the initial one is not on its own cohorts list) 560 * and the new instance is linked to all parents of the initial 561 * instance. 562 */ 563 register GNode *cohort; 564 565 /* 566 * Propagate copied bits to the initial node. They'll be propagated 567 * back to the rest of the cohorts later. 568 */ 569 gn->type |= op & ~OP_OPMASK; 570 571 cohort = Targ_NewGN(gn->name); 572 /* 573 * Make the cohort invisible as well to avoid duplicating it into 574 * other variables. True, parents of this target won't tend to do 575 * anything with their local variables, but better safe than 576 * sorry. (I think this is pointless now, since the relevant list 577 * traversals will no longer see this node anyway. -mycroft) 578 */ 579 cohort->type = op | OP_INVISIBLE; 580 (void)Lst_AtEnd(gn->cohorts, (ClientData)cohort); 581 cohort->centurion = gn; 582 gn->unmade_cohorts += 1; 583 } else { 584 /* 585 * We don't want to nuke any previous flags (whatever they were) so we 586 * just OR the new operator into the old 587 */ 588 gn->type |= op; 589 } 590 591 return (0); 592 } 593 594 /*- 595 *--------------------------------------------------------------------- 596 * ParseAddDep -- 597 * Check if the pair of GNodes given needs to be synchronized. 598 * This has to be when two nodes are on different sides of a 599 * .WAIT directive. 600 * 601 * Results: 602 * Returns 1 if the two targets need to be ordered, 0 otherwise. 603 * If it returns 1, the search can stop 604 * 605 * Side Effects: 606 * A dependency can be added between the two nodes. 607 * 608 *--------------------------------------------------------------------- 609 */ 610 static int 611 ParseAddDep(pp, sp) 612 ClientData pp; 613 ClientData sp; 614 { 615 GNode *p = (GNode *) pp; 616 GNode *s = (GNode *) sp; 617 618 if (p->order < s->order) { 619 /* 620 * XXX: This can cause loops, and loops can cause unmade targets, 621 * but checking is tedious, and the debugging output can show the 622 * problem 623 */ 624 (void)Lst_AtEnd(p->successors, (ClientData)s); 625 (void)Lst_AtEnd(s->preds, (ClientData)p); 626 return 0; 627 } 628 else 629 return 1; 630 } 631 632 633 /*- 634 *--------------------------------------------------------------------- 635 * ParseDoSrc -- 636 * Given the name of a source, figure out if it is an attribute 637 * and apply it to the targets if it is. Else decide if there is 638 * some attribute which should be applied *to* the source because 639 * of some special target and apply it if so. Otherwise, make the 640 * source be a child of the targets in the list 'targets' 641 * 642 * Results: 643 * None 644 * 645 * Side Effects: 646 * Operator bits may be added to the list of targets or to the source. 647 * The targets may have a new source added to their lists of children. 648 *--------------------------------------------------------------------- 649 */ 650 static void 651 ParseDoSrc (tOp, src, allsrc) 652 int tOp; /* operator (if any) from special targets */ 653 char *src; /* name of the source to handle */ 654 Lst allsrc; /* List of all sources to wait for */ 655 656 { 657 GNode *gn = NULL; 658 659 if (*src == '.' && isupper ((unsigned char)src[1])) { 660 int keywd = ParseFindKeyword(src); 661 if (keywd != -1) { 662 int op = parseKeywords[keywd].op; 663 if (op != 0) { 664 Lst_ForEach (targets, ParseDoOp, (ClientData)&op); 665 return; 666 } 667 if (parseKeywords[keywd].spec == Wait) { 668 waiting++; 669 return; 670 } 671 } 672 } 673 674 switch (specType) { 675 case Main: 676 /* 677 * If we have noted the existence of a .MAIN, it means we need 678 * to add the sources of said target to the list of things 679 * to create. The string 'src' is likely to be free, so we 680 * must make a new copy of it. Note that this will only be 681 * invoked if the user didn't specify a target on the command 682 * line. This is to allow #ifmake's to succeed, or something... 683 */ 684 (void) Lst_AtEnd (create, (ClientData)estrdup(src)); 685 /* 686 * Add the name to the .TARGETS variable as well, so the user cna 687 * employ that, if desired. 688 */ 689 Var_Append(".TARGETS", src, VAR_GLOBAL); 690 return; 691 692 case Order: 693 /* 694 * Create proper predecessor/successor links between the previous 695 * source and the current one. 696 */ 697 gn = Targ_FindNode(src, TARG_CREATE); 698 if (predecessor != NILGNODE) { 699 (void)Lst_AtEnd(predecessor->successors, (ClientData)gn); 700 (void)Lst_AtEnd(gn->preds, (ClientData)predecessor); 701 } 702 /* 703 * The current source now becomes the predecessor for the next one. 704 */ 705 predecessor = gn; 706 break; 707 708 default: 709 /* 710 * If the source is not an attribute, we need to find/create 711 * a node for it. After that we can apply any operator to it 712 * from a special target or link it to its parents, as 713 * appropriate. 714 * 715 * In the case of a source that was the object of a :: operator, 716 * the attribute is applied to all of its instances (as kept in 717 * the 'cohorts' list of the node) or all the cohorts are linked 718 * to all the targets. 719 */ 720 gn = Targ_FindNode (src, TARG_CREATE); 721 if (tOp) { 722 gn->type |= tOp; 723 } else { 724 Lst_ForEach (targets, ParseLinkSrc, (ClientData)gn); 725 } 726 break; 727 } 728 729 gn->order = waiting; 730 (void)Lst_AtEnd(allsrc, (ClientData)gn); 731 if (waiting) { 732 Lst_ForEach(allsrc, ParseAddDep, (ClientData)gn); 733 } 734 } 735 736 /*- 737 *----------------------------------------------------------------------- 738 * ParseFindMain -- 739 * Find a real target in the list and set it to be the main one. 740 * Called by ParseDoDependency when a main target hasn't been found 741 * yet. 742 * 743 * Results: 744 * 0 if main not found yet, 1 if it is. 745 * 746 * Side Effects: 747 * mainNode is changed and Targ_SetMain is called. 748 * 749 *----------------------------------------------------------------------- 750 */ 751 static int 752 ParseFindMain(gnp, dummy) 753 ClientData gnp; /* Node to examine */ 754 ClientData dummy; 755 { 756 GNode *gn = (GNode *) gnp; 757 if ((gn->type & OP_NOTARGET) == 0) { 758 mainNode = gn; 759 Targ_SetMain(gn); 760 return (dummy ? 1 : 1); 761 } else { 762 return (dummy ? 0 : 0); 763 } 764 } 765 766 /*- 767 *----------------------------------------------------------------------- 768 * ParseAddDir -- 769 * Front-end for Dir_AddDir to make sure Lst_ForEach keeps going 770 * 771 * Results: 772 * === 0 773 * 774 * Side Effects: 775 * See Dir_AddDir. 776 * 777 *----------------------------------------------------------------------- 778 */ 779 static int 780 ParseAddDir(path, name) 781 ClientData path; 782 ClientData name; 783 { 784 (void) Dir_AddDir((Lst) path, (char *) name); 785 return(0); 786 } 787 788 /*- 789 *----------------------------------------------------------------------- 790 * ParseClearPath -- 791 * Front-end for Dir_ClearPath to make sure Lst_ForEach keeps going 792 * 793 * Results: 794 * === 0 795 * 796 * Side Effects: 797 * See Dir_ClearPath 798 * 799 *----------------------------------------------------------------------- 800 */ 801 static int 802 ParseClearPath(path, dummy) 803 ClientData path; 804 ClientData dummy; 805 { 806 Dir_ClearPath((Lst) path); 807 return(dummy ? 0 : 0); 808 } 809 810 /*- 811 *--------------------------------------------------------------------- 812 * ParseDoDependency -- 813 * Parse the dependency line in line. 814 * 815 * Results: 816 * None 817 * 818 * Side Effects: 819 * The nodes of the sources are linked as children to the nodes of the 820 * targets. Some nodes may be created. 821 * 822 * We parse a dependency line by first extracting words from the line and 823 * finding nodes in the list of all targets with that name. This is done 824 * until a character is encountered which is an operator character. Currently 825 * these are only ! and :. At this point the operator is parsed and the 826 * pointer into the line advanced until the first source is encountered. 827 * The parsed operator is applied to each node in the 'targets' list, 828 * which is where the nodes found for the targets are kept, by means of 829 * the ParseDoOp function. 830 * The sources are read in much the same way as the targets were except 831 * that now they are expanded using the wildcarding scheme of the C-Shell 832 * and all instances of the resulting words in the list of all targets 833 * are found. Each of the resulting nodes is then linked to each of the 834 * targets as one of its children. 835 * Certain targets are handled specially. These are the ones detailed 836 * by the specType variable. 837 * The storing of transformation rules is also taken care of here. 838 * A target is recognized as a transformation rule by calling 839 * Suff_IsTransform. If it is a transformation rule, its node is gotten 840 * from the suffix module via Suff_AddTransform rather than the standard 841 * Targ_FindNode in the target module. 842 *--------------------------------------------------------------------- 843 */ 844 static void 845 ParseDoDependency (line) 846 char *line; /* the line to parse */ 847 { 848 char *cp; /* our current position */ 849 GNode *gn; /* a general purpose temporary node */ 850 int op; /* the operator on the line */ 851 char savec; /* a place to save a character */ 852 Lst paths; /* List of search paths to alter when parsing 853 * a list of .PATH targets */ 854 int tOp; /* operator from special target */ 855 Lst sources; /* list of archive source names after 856 * expansion */ 857 Lst curTargs; /* list of target names to be found and added 858 * to the targets list */ 859 Lst curSrcs; /* list of sources in order */ 860 char *lstart = line; 861 862 tOp = 0; 863 864 specType = Not; 865 waiting = 0; 866 paths = (Lst)NULL; 867 868 curTargs = Lst_Init(FALSE); 869 curSrcs = Lst_Init(FALSE); 870 871 do { 872 for (cp = line; 873 *cp && (ParseIsEscaped(lstart, cp) || 874 (!isspace ((unsigned char)*cp) && 875 (*cp != '!') && (*cp != ':') && (*cp != LPAREN))); 876 cp++) 877 { 878 if (*cp == '$') { 879 /* 880 * Must be a dynamic source (would have been expanded 881 * otherwise), so call the Var module to parse the puppy 882 * so we can safely advance beyond it...There should be 883 * no errors in this, as they would have been discovered 884 * in the initial Var_Subst and we wouldn't be here. 885 */ 886 int length; 887 Boolean freeIt; 888 char *result; 889 890 result=Var_Parse(cp, VAR_CMD, TRUE, &length, &freeIt); 891 892 if (freeIt) { 893 free(result); 894 } 895 cp += length-1; 896 } 897 continue; 898 } 899 if (!ParseIsEscaped(lstart, cp) && *cp == LPAREN) { 900 /* 901 * Archives must be handled specially to make sure the OP_ARCHV 902 * flag is set in their 'type' field, for one thing, and because 903 * things like "archive(file1.o file2.o file3.o)" are permissible. 904 * Arch_ParseArchive will set 'line' to be the first non-blank 905 * after the archive-spec. It creates/finds nodes for the members 906 * and places them on the given list, returning SUCCESS if all 907 * went well and FAILURE if there was an error in the 908 * specification. On error, line should remain untouched. 909 */ 910 if (Arch_ParseArchive (&line, targets, VAR_CMD) != SUCCESS) { 911 Parse_Error (PARSE_FATAL, 912 "Error in archive specification: \"%s\"", line); 913 return; 914 } else { 915 continue; 916 } 917 } 918 savec = *cp; 919 920 if (!*cp) { 921 /* 922 * Ending a dependency line without an operator is a Bozo 923 * no-no. As a heuristic, this is also often triggered by 924 * undetected conflicts from cvs/rcs merges. 925 */ 926 if ((strncmp(line, "<<<<<<", 6) == 0) || 927 (strncmp(line, "======", 6) == 0) || 928 (strncmp(line, ">>>>>>", 6) == 0)) 929 Parse_Error (PARSE_FATAL, 930 "Makefile appears to contain unresolved cvs/rcs/??? merge conflicts"); 931 else 932 Parse_Error (PARSE_FATAL, "Need an operator"); 933 return; 934 } 935 *cp = '\0'; 936 /* 937 * Have a word in line. See if it's a special target and set 938 * specType to match it. 939 */ 940 if (*line == '.' && isupper ((unsigned char)line[1])) { 941 /* 942 * See if the target is a special target that must have it 943 * or its sources handled specially. 944 */ 945 int keywd = ParseFindKeyword(line); 946 if (keywd != -1) { 947 if (specType == ExPath && parseKeywords[keywd].spec != ExPath) { 948 Parse_Error(PARSE_FATAL, "Mismatched special targets"); 949 return; 950 } 951 952 specType = parseKeywords[keywd].spec; 953 tOp = parseKeywords[keywd].op; 954 955 /* 956 * Certain special targets have special semantics: 957 * .PATH Have to set the dirSearchPath 958 * variable too 959 * .MAIN Its sources are only used if 960 * nothing has been specified to 961 * create. 962 * .DEFAULT Need to create a node to hang 963 * commands on, but we don't want 964 * it in the graph, nor do we want 965 * it to be the Main Target, so we 966 * create it, set OP_NOTMAIN and 967 * add it to the list, setting 968 * DEFAULT to the new node for 969 * later use. We claim the node is 970 * A transformation rule to make 971 * life easier later, when we'll 972 * use Make_HandleUse to actually 973 * apply the .DEFAULT commands. 974 * .PHONY The list of targets 975 * .NOPATH Don't search for file in the path 976 * .BEGIN 977 * .END 978 * .INTERRUPT Are not to be considered the 979 * main target. 980 * .NOTPARALLEL Make only one target at a time. 981 * .SINGLESHELL Create a shell for each command. 982 * .ORDER Must set initial predecessor to NIL 983 */ 984 switch (specType) { 985 case ExPath: 986 if (paths == NULL) { 987 paths = Lst_Init(FALSE); 988 } 989 (void)Lst_AtEnd(paths, (ClientData)dirSearchPath); 990 break; 991 case Main: 992 if (!Lst_IsEmpty(create)) { 993 specType = Not; 994 } 995 break; 996 case Begin: 997 case End: 998 case Interrupt: 999 gn = Targ_FindNode(line, TARG_CREATE); 1000 gn->type |= OP_NOTMAIN; 1001 (void)Lst_AtEnd(targets, (ClientData)gn); 1002 break; 1003 case Default: 1004 gn = Targ_NewGN(".DEFAULT"); 1005 gn->type |= (OP_NOTMAIN|OP_TRANSFORM); 1006 (void)Lst_AtEnd(targets, (ClientData)gn); 1007 DEFAULT = gn; 1008 break; 1009 case NotParallel: 1010 { 1011 maxJobs = 1; 1012 break; 1013 } 1014 case SingleShell: 1015 compatMake = TRUE; 1016 break; 1017 case Order: 1018 predecessor = NILGNODE; 1019 break; 1020 default: 1021 break; 1022 } 1023 } else if (strncmp (line, ".PATH", 5) == 0) { 1024 /* 1025 * .PATH<suffix> has to be handled specially. 1026 * Call on the suffix module to give us a path to 1027 * modify. 1028 */ 1029 Lst path; 1030 1031 specType = ExPath; 1032 path = Suff_GetPath (&line[5]); 1033 if (path == NILLST) { 1034 Parse_Error (PARSE_FATAL, 1035 "Suffix '%s' not defined (yet)", 1036 &line[5]); 1037 return; 1038 } else { 1039 if (paths == (Lst)NULL) { 1040 paths = Lst_Init(FALSE); 1041 } 1042 (void)Lst_AtEnd(paths, (ClientData)path); 1043 } 1044 } 1045 } 1046 1047 /* 1048 * Have word in line. Get or create its node and stick it at 1049 * the end of the targets list 1050 */ 1051 if ((specType == Not) && (*line != '\0')) { 1052 if (Dir_HasWildcards(line)) { 1053 /* 1054 * Targets are to be sought only in the current directory, 1055 * so create an empty path for the thing. Note we need to 1056 * use Dir_Destroy in the destruction of the path as the 1057 * Dir module could have added a directory to the path... 1058 */ 1059 Lst emptyPath = Lst_Init(FALSE); 1060 1061 Dir_Expand(line, emptyPath, curTargs); 1062 1063 Lst_Destroy(emptyPath, Dir_Destroy); 1064 } else { 1065 /* 1066 * No wildcards, but we want to avoid code duplication, 1067 * so create a list with the word on it. 1068 */ 1069 (void)Lst_AtEnd(curTargs, (ClientData)line); 1070 } 1071 1072 while(!Lst_IsEmpty(curTargs)) { 1073 char *targName = (char *)Lst_DeQueue(curTargs); 1074 1075 if (!Suff_IsTransform (targName)) { 1076 gn = Targ_FindNode (targName, TARG_CREATE); 1077 } else { 1078 gn = Suff_AddTransform (targName); 1079 } 1080 1081 (void)Lst_AtEnd (targets, (ClientData)gn); 1082 } 1083 } else if (specType == ExPath && *line != '.' && *line != '\0') { 1084 Parse_Error(PARSE_WARNING, "Extra target (%s) ignored", line); 1085 } 1086 1087 *cp = savec; 1088 /* 1089 * If it is a special type and not .PATH, it's the only target we 1090 * allow on this line... 1091 */ 1092 if (specType != Not && specType != ExPath) { 1093 Boolean warn = FALSE; 1094 1095 while (*cp && (ParseIsEscaped(lstart, cp) || 1096 ((*cp != '!') && (*cp != ':')))) { 1097 if (ParseIsEscaped(lstart, cp) || 1098 (*cp != ' ' && *cp != '\t')) { 1099 warn = TRUE; 1100 } 1101 cp++; 1102 } 1103 if (warn) { 1104 Parse_Error(PARSE_WARNING, "Extra target ignored"); 1105 } 1106 } else { 1107 while (*cp && isspace ((unsigned char)*cp)) { 1108 cp++; 1109 } 1110 } 1111 line = cp; 1112 } while (*line && (ParseIsEscaped(lstart, line) || 1113 ((*line != '!') && (*line != ':')))); 1114 1115 /* 1116 * Don't need the list of target names anymore... 1117 */ 1118 Lst_Destroy(curTargs, NOFREE); 1119 1120 if (!Lst_IsEmpty(targets)) { 1121 switch(specType) { 1122 default: 1123 Parse_Error(PARSE_WARNING, "Special and mundane targets don't mix. Mundane ones ignored"); 1124 break; 1125 case Default: 1126 case Begin: 1127 case End: 1128 case Interrupt: 1129 /* 1130 * These four create nodes on which to hang commands, so 1131 * targets shouldn't be empty... 1132 */ 1133 case Not: 1134 /* 1135 * Nothing special here -- targets can be empty if it wants. 1136 */ 1137 break; 1138 } 1139 } 1140 1141 /* 1142 * Have now parsed all the target names. Must parse the operator next. The 1143 * result is left in op . 1144 */ 1145 if (*cp == '!') { 1146 op = OP_FORCE; 1147 } else if (*cp == ':') { 1148 if (cp[1] == ':') { 1149 op = OP_DOUBLEDEP; 1150 cp++; 1151 } else { 1152 op = OP_DEPENDS; 1153 } 1154 } else { 1155 Parse_Error (PARSE_FATAL, "Missing dependency operator"); 1156 return; 1157 } 1158 1159 cp++; /* Advance beyond operator */ 1160 1161 Lst_ForEach (targets, ParseDoOp, (ClientData)&op); 1162 1163 /* 1164 * Get to the first source 1165 */ 1166 while (*cp && isspace ((unsigned char)*cp)) { 1167 cp++; 1168 } 1169 line = cp; 1170 1171 /* 1172 * Several special targets take different actions if present with no 1173 * sources: 1174 * a .SUFFIXES line with no sources clears out all old suffixes 1175 * a .PRECIOUS line makes all targets precious 1176 * a .IGNORE line ignores errors for all targets 1177 * a .SILENT line creates silence when making all targets 1178 * a .PATH removes all directories from the search path(s). 1179 */ 1180 if (!*line) { 1181 switch (specType) { 1182 case Suffixes: 1183 Suff_ClearSuffixes (); 1184 break; 1185 case Precious: 1186 allPrecious = TRUE; 1187 break; 1188 case Ignore: 1189 ignoreErrors = TRUE; 1190 break; 1191 case Silent: 1192 beSilent = TRUE; 1193 break; 1194 case ExPath: 1195 Lst_ForEach(paths, ParseClearPath, (ClientData)NULL); 1196 break; 1197 #ifdef POSIX 1198 case Posix: 1199 Var_Set("%POSIX", "1003.2", VAR_GLOBAL, 0); 1200 break; 1201 #endif 1202 default: 1203 break; 1204 } 1205 } else if (specType == MFlags) { 1206 /* 1207 * Call on functions in main.c to deal with these arguments and 1208 * set the initial character to a null-character so the loop to 1209 * get sources won't get anything 1210 */ 1211 Main_ParseArgLine (line); 1212 *line = '\0'; 1213 } else if (specType == ExShell) { 1214 if (Job_ParseShell (line) != SUCCESS) { 1215 Parse_Error (PARSE_FATAL, "improper shell specification"); 1216 return; 1217 } 1218 *line = '\0'; 1219 } else if ((specType == NotParallel) || (specType == SingleShell)) { 1220 *line = '\0'; 1221 } 1222 1223 /* 1224 * NOW GO FOR THE SOURCES 1225 */ 1226 if ((specType == Suffixes) || (specType == ExPath) || 1227 (specType == Includes) || (specType == Libs) || 1228 (specType == Null) || (specType == ExObjdir)) 1229 { 1230 while (*line) { 1231 /* 1232 * If the target was one that doesn't take files as its sources 1233 * but takes something like suffixes, we take each 1234 * space-separated word on the line as a something and deal 1235 * with it accordingly. 1236 * 1237 * If the target was .SUFFIXES, we take each source as a 1238 * suffix and add it to the list of suffixes maintained by the 1239 * Suff module. 1240 * 1241 * If the target was a .PATH, we add the source as a directory 1242 * to search on the search path. 1243 * 1244 * If it was .INCLUDES, the source is taken to be the suffix of 1245 * files which will be #included and whose search path should 1246 * be present in the .INCLUDES variable. 1247 * 1248 * If it was .LIBS, the source is taken to be the suffix of 1249 * files which are considered libraries and whose search path 1250 * should be present in the .LIBS variable. 1251 * 1252 * If it was .NULL, the source is the suffix to use when a file 1253 * has no valid suffix. 1254 * 1255 * If it was .OBJDIR, the source is a new definition for .OBJDIR, 1256 * and will cause make to do a new chdir to that path. 1257 */ 1258 while (*cp && !isspace ((unsigned char)*cp)) { 1259 cp++; 1260 } 1261 savec = *cp; 1262 *cp = '\0'; 1263 switch (specType) { 1264 case Suffixes: 1265 Suff_AddSuffix (line, &mainNode); 1266 break; 1267 case ExPath: 1268 Lst_ForEach(paths, ParseAddDir, (ClientData)line); 1269 break; 1270 case Includes: 1271 Suff_AddInclude (line); 1272 break; 1273 case Libs: 1274 Suff_AddLib (line); 1275 break; 1276 case Null: 1277 Suff_SetNull (line); 1278 break; 1279 case ExObjdir: 1280 Main_SetObjdir(line); 1281 break; 1282 default: 1283 break; 1284 } 1285 *cp = savec; 1286 if (savec != '\0') { 1287 cp++; 1288 } 1289 while (*cp && isspace ((unsigned char)*cp)) { 1290 cp++; 1291 } 1292 line = cp; 1293 } 1294 if (paths) { 1295 Lst_Destroy(paths, NOFREE); 1296 } 1297 } else { 1298 while (*line) { 1299 /* 1300 * The targets take real sources, so we must beware of archive 1301 * specifications (i.e. things with left parentheses in them) 1302 * and handle them accordingly. 1303 */ 1304 while (*cp && !isspace ((unsigned char)*cp)) { 1305 if ((*cp == LPAREN) && (cp > line) && (cp[-1] != '$')) { 1306 /* 1307 * Only stop for a left parenthesis if it isn't at the 1308 * start of a word (that'll be for variable changes 1309 * later) and isn't preceded by a dollar sign (a dynamic 1310 * source). 1311 */ 1312 break; 1313 } else { 1314 cp++; 1315 } 1316 } 1317 1318 if (*cp == LPAREN) { 1319 sources = Lst_Init (FALSE); 1320 if (Arch_ParseArchive (&line, sources, VAR_CMD) != SUCCESS) { 1321 Parse_Error (PARSE_FATAL, 1322 "Error in source archive spec \"%s\"", line); 1323 return; 1324 } 1325 1326 while (!Lst_IsEmpty (sources)) { 1327 gn = (GNode *) Lst_DeQueue (sources); 1328 ParseDoSrc (tOp, gn->name, curSrcs); 1329 } 1330 Lst_Destroy (sources, NOFREE); 1331 cp = line; 1332 } else { 1333 if (*cp) { 1334 *cp = '\0'; 1335 cp += 1; 1336 } 1337 1338 ParseDoSrc (tOp, line, curSrcs); 1339 } 1340 while (*cp && isspace ((unsigned char)*cp)) { 1341 cp++; 1342 } 1343 line = cp; 1344 } 1345 } 1346 1347 if (mainNode == NILGNODE) { 1348 /* 1349 * If we have yet to decide on a main target to make, in the 1350 * absence of any user input, we want the first target on 1351 * the first dependency line that is actually a real target 1352 * (i.e. isn't a .USE or .EXEC rule) to be made. 1353 */ 1354 Lst_ForEach (targets, ParseFindMain, (ClientData)0); 1355 } 1356 1357 /* 1358 * Finally, destroy the list of sources 1359 */ 1360 Lst_Destroy(curSrcs, NOFREE); 1361 } 1362 1363 /*- 1364 *--------------------------------------------------------------------- 1365 * Parse_IsVar -- 1366 * Return TRUE if the passed line is a variable assignment. A variable 1367 * assignment consists of a single word followed by optional whitespace 1368 * followed by either a += or an = operator. 1369 * This function is used both by the Parse_File function and main when 1370 * parsing the command-line arguments. 1371 * 1372 * Results: 1373 * TRUE if it is. FALSE if it ain't 1374 * 1375 * Side Effects: 1376 * none 1377 *--------------------------------------------------------------------- 1378 */ 1379 Boolean 1380 Parse_IsVar (line) 1381 register char *line; /* the line to check */ 1382 { 1383 register Boolean wasSpace = FALSE; /* set TRUE if found a space */ 1384 register Boolean haveName = FALSE; /* Set TRUE if have a variable name */ 1385 int level = 0; 1386 #define ISEQOPERATOR(c) \ 1387 (((c) == '+') || ((c) == ':') || ((c) == '?') || ((c) == '!')) 1388 1389 /* 1390 * Skip to variable name 1391 */ 1392 for (;(*line == ' ') || (*line == '\t'); line++) 1393 continue; 1394 1395 for (; *line != '=' || level != 0; line++) 1396 switch (*line) { 1397 case '\0': 1398 /* 1399 * end-of-line -- can't be a variable assignment. 1400 */ 1401 return FALSE; 1402 1403 case ' ': 1404 case '\t': 1405 /* 1406 * there can be as much white space as desired so long as there is 1407 * only one word before the operator 1408 */ 1409 wasSpace = TRUE; 1410 break; 1411 1412 case LPAREN: 1413 case '{': 1414 level++; 1415 break; 1416 1417 case '}': 1418 case RPAREN: 1419 level--; 1420 break; 1421 1422 default: 1423 if (wasSpace && haveName) { 1424 if (ISEQOPERATOR(*line)) { 1425 /* 1426 * We must have a finished word 1427 */ 1428 if (level != 0) 1429 return FALSE; 1430 1431 /* 1432 * When an = operator [+?!:] is found, the next 1433 * character must be an = or it ain't a valid 1434 * assignment. 1435 */ 1436 if (line[1] == '=') 1437 return haveName; 1438 #ifdef SUNSHCMD 1439 /* 1440 * This is a shell command 1441 */ 1442 if (strncmp(line, ":sh", 3) == 0) 1443 return haveName; 1444 #endif 1445 } 1446 /* 1447 * This is the start of another word, so not assignment. 1448 */ 1449 return FALSE; 1450 } 1451 else { 1452 haveName = TRUE; 1453 wasSpace = FALSE; 1454 } 1455 break; 1456 } 1457 1458 return haveName; 1459 } 1460 1461 /*- 1462 *--------------------------------------------------------------------- 1463 * Parse_DoVar -- 1464 * Take the variable assignment in the passed line and do it in the 1465 * global context. 1466 * 1467 * Note: There is a lexical ambiguity with assignment modifier characters 1468 * in variable names. This routine interprets the character before the = 1469 * as a modifier. Therefore, an assignment like 1470 * C++=/usr/bin/CC 1471 * is interpreted as "C+ +=" instead of "C++ =". 1472 * 1473 * Results: 1474 * none 1475 * 1476 * Side Effects: 1477 * the variable structure of the given variable name is altered in the 1478 * global context. 1479 *--------------------------------------------------------------------- 1480 */ 1481 void 1482 Parse_DoVar (line, ctxt) 1483 char *line; /* a line guaranteed to be a variable 1484 * assignment. This reduces error checks */ 1485 GNode *ctxt; /* Context in which to do the assignment */ 1486 { 1487 char *cp; /* pointer into line */ 1488 enum { 1489 VAR_SUBST, VAR_APPEND, VAR_SHELL, VAR_NORMAL 1490 } type; /* Type of assignment */ 1491 char *opc; /* ptr to operator character to 1492 * null-terminate the variable name */ 1493 /* 1494 * Avoid clobbered variable warnings by forcing the compiler 1495 * to ``unregister'' variables 1496 */ 1497 #if __GNUC__ 1498 (void) &cp; 1499 (void) &line; 1500 #endif 1501 1502 /* 1503 * Skip to variable name 1504 */ 1505 while ((*line == ' ') || (*line == '\t')) { 1506 line++; 1507 } 1508 1509 /* 1510 * Skip to operator character, nulling out whitespace as we go 1511 */ 1512 for (cp = line + 1; *cp != '='; cp++) { 1513 if (isspace ((unsigned char)*cp)) { 1514 *cp = '\0'; 1515 } 1516 } 1517 opc = cp-1; /* operator is the previous character */ 1518 *cp++ = '\0'; /* nuke the = */ 1519 1520 /* 1521 * Check operator type 1522 */ 1523 switch (*opc) { 1524 case '+': 1525 type = VAR_APPEND; 1526 *opc = '\0'; 1527 break; 1528 1529 case '?': 1530 /* 1531 * If the variable already has a value, we don't do anything. 1532 */ 1533 *opc = '\0'; 1534 if (Var_Exists(line, ctxt)) { 1535 return; 1536 } else { 1537 type = VAR_NORMAL; 1538 } 1539 break; 1540 1541 case ':': 1542 type = VAR_SUBST; 1543 *opc = '\0'; 1544 break; 1545 1546 case '!': 1547 type = VAR_SHELL; 1548 *opc = '\0'; 1549 break; 1550 1551 default: 1552 #ifdef SUNSHCMD 1553 while (opc > line && *opc != ':') 1554 opc--; 1555 1556 if (strncmp(opc, ":sh", 3) == 0) { 1557 type = VAR_SHELL; 1558 *opc = '\0'; 1559 break; 1560 } 1561 #endif 1562 type = VAR_NORMAL; 1563 break; 1564 } 1565 1566 while (isspace ((unsigned char)*cp)) { 1567 cp++; 1568 } 1569 1570 if (type == VAR_APPEND) { 1571 Var_Append (line, cp, ctxt); 1572 } else if (type == VAR_SUBST) { 1573 /* 1574 * Allow variables in the old value to be undefined, but leave their 1575 * invocation alone -- this is done by forcing oldVars to be false. 1576 * XXX: This can cause recursive variables, but that's not hard to do, 1577 * and this allows someone to do something like 1578 * 1579 * CFLAGS = $(.INCLUDES) 1580 * CFLAGS := -I.. $(CFLAGS) 1581 * 1582 * And not get an error. 1583 */ 1584 Boolean oldOldVars = oldVars; 1585 1586 oldVars = FALSE; 1587 1588 /* 1589 * make sure that we set the variable the first time to nothing 1590 * so that it gets substituted! 1591 */ 1592 if (!Var_Exists(line, ctxt)) 1593 Var_Set(line, "", ctxt, 0); 1594 1595 cp = Var_Subst(NULL, cp, ctxt, FALSE); 1596 oldVars = oldOldVars; 1597 1598 Var_Set(line, cp, ctxt, 0); 1599 free(cp); 1600 } else if (type == VAR_SHELL) { 1601 Boolean freeCmd = FALSE; /* TRUE if the command needs to be freed, i.e. 1602 * if any variable expansion was performed */ 1603 char *res, *err; 1604 1605 if (strchr(cp, '$') != NULL) { 1606 /* 1607 * There's a dollar sign in the command, so perform variable 1608 * expansion on the whole thing. The resulting string will need 1609 * freeing when we're done, so set freeCmd to TRUE. 1610 */ 1611 cp = Var_Subst(NULL, cp, VAR_CMD, TRUE); 1612 freeCmd = TRUE; 1613 } 1614 1615 res = Cmd_Exec(cp, &err); 1616 Var_Set(line, res, ctxt, 0); 1617 free(res); 1618 1619 if (err) 1620 Parse_Error(PARSE_WARNING, err, cp); 1621 1622 if (freeCmd) 1623 free(cp); 1624 } else { 1625 /* 1626 * Normal assignment -- just do it. 1627 */ 1628 Var_Set(line, cp, ctxt, 0); 1629 } 1630 if (strcmp(line, MAKEOVERRIDES) == 0) 1631 Main_ExportMAKEFLAGS(FALSE); /* re-export MAKEFLAGS */ 1632 } 1633 1634 1635 /*- 1636 * ParseAddCmd -- 1637 * Lst_ForEach function to add a command line to all targets 1638 * 1639 * Results: 1640 * Always 0 1641 * 1642 * Side Effects: 1643 * A new element is added to the commands list of the node. 1644 */ 1645 static int 1646 ParseAddCmd(gnp, cmd) 1647 ClientData gnp; /* the node to which the command is to be added */ 1648 ClientData cmd; /* the command to add */ 1649 { 1650 GNode *gn = (GNode *) gnp; 1651 /* if target already supplied, ignore commands */ 1652 if ((gn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (gn->cohorts)) 1653 gn = (GNode *) Lst_Datum (Lst_Last (gn->cohorts)); 1654 if (!(gn->type & OP_HAS_COMMANDS)) { 1655 (void)Lst_AtEnd(gn->commands, cmd); 1656 ParseMark(gn); 1657 } else { 1658 #ifdef notyet 1659 /* XXX: We cannot do this until we fix the tree */ 1660 (void)Lst_AtEnd(gn->commands, cmd); 1661 Parse_Error (PARSE_WARNING, 1662 "overriding commands for target \"%s\"; " 1663 "previous commands defined at %s: %d ignored", 1664 gn->name, gn->fname, gn->lineno); 1665 #else 1666 Parse_Error (PARSE_WARNING, 1667 "duplicate script for target \"%s\" ignored", 1668 gn->name); 1669 ParseErrorInternal (gn->fname, gn->lineno, PARSE_WARNING, 1670 "using previous script for \"%s\" defined here", 1671 gn->name); 1672 #endif 1673 } 1674 return(0); 1675 } 1676 1677 /*- 1678 *----------------------------------------------------------------------- 1679 * ParseHasCommands -- 1680 * Callback procedure for Parse_File when destroying the list of 1681 * targets on the last dependency line. Marks a target as already 1682 * having commands if it does, to keep from having shell commands 1683 * on multiple dependency lines. 1684 * 1685 * Results: 1686 * None 1687 * 1688 * Side Effects: 1689 * OP_HAS_COMMANDS may be set for the target. 1690 * 1691 *----------------------------------------------------------------------- 1692 */ 1693 static void 1694 ParseHasCommands(gnp) 1695 ClientData gnp; /* Node to examine */ 1696 { 1697 GNode *gn = (GNode *) gnp; 1698 if (!Lst_IsEmpty(gn->commands)) { 1699 gn->type |= OP_HAS_COMMANDS; 1700 } 1701 } 1702 1703 /*- 1704 *----------------------------------------------------------------------- 1705 * Parse_AddIncludeDir -- 1706 * Add a directory to the path searched for included makefiles 1707 * bracketed by double-quotes. Used by functions in main.c 1708 * 1709 * Results: 1710 * None. 1711 * 1712 * Side Effects: 1713 * The directory is appended to the list. 1714 * 1715 *----------------------------------------------------------------------- 1716 */ 1717 void 1718 Parse_AddIncludeDir (dir) 1719 char *dir; /* The name of the directory to add */ 1720 { 1721 (void) Dir_AddDir (parseIncPath, dir); 1722 } 1723 1724 /*- 1725 *--------------------------------------------------------------------- 1726 * ParseDoInclude -- 1727 * Push to another file. 1728 * 1729 * The input is the line minus the `.'. A file spec is a string 1730 * enclosed in <> or "". The former is looked for only in sysIncPath. 1731 * The latter in . and the directories specified by -I command line 1732 * options 1733 * 1734 * Results: 1735 * None 1736 * 1737 * Side Effects: 1738 * A structure is added to the includes Lst and readProc, lineno, 1739 * fname and curFILE are altered for the new file 1740 *--------------------------------------------------------------------- 1741 */ 1742 static void 1743 ParseDoInclude (line) 1744 char *line; 1745 { 1746 char *fullname; /* full pathname of file */ 1747 IFile *oldFile; /* state associated with current file */ 1748 char endc; /* the character which ends the file spec */ 1749 char *cp; /* current position in file spec */ 1750 Boolean isSystem; /* TRUE if makefile is a system makefile */ 1751 int silent = (*line != 'i') ? 1 : 0; 1752 char *file = &line[7 + silent]; 1753 1754 /* 1755 * Skip to delimiter character so we know where to look 1756 */ 1757 while ((*file == ' ') || (*file == '\t')) { 1758 file++; 1759 } 1760 1761 if ((*file != '"') && (*file != '<')) { 1762 Parse_Error (PARSE_FATAL, 1763 ".include filename must be delimited by '\"' or '<'"); 1764 return; 1765 } 1766 1767 /* 1768 * Set the search path on which to find the include file based on the 1769 * characters which bracket its name. Angle-brackets imply it's 1770 * a system Makefile while double-quotes imply it's a user makefile 1771 */ 1772 if (*file == '<') { 1773 isSystem = TRUE; 1774 endc = '>'; 1775 } else { 1776 isSystem = FALSE; 1777 endc = '"'; 1778 } 1779 1780 /* 1781 * Skip to matching delimiter 1782 */ 1783 for (cp = ++file; *cp && *cp != endc; cp++) { 1784 continue; 1785 } 1786 1787 if (*cp != endc) { 1788 Parse_Error (PARSE_FATAL, 1789 "Unclosed %cinclude filename. '%c' expected", 1790 '.', endc); 1791 return; 1792 } 1793 *cp = '\0'; 1794 1795 /* 1796 * Substitute for any variables in the file name before trying to 1797 * find the thing. 1798 */ 1799 file = Var_Subst (NULL, file, VAR_CMD, FALSE); 1800 1801 /* 1802 * Now we know the file's name and its search path, we attempt to 1803 * find the durn thing. A return of NULL indicates the file don't 1804 * exist. 1805 */ 1806 fullname = (char *)NULL; 1807 1808 if (!isSystem) { 1809 /* 1810 * Include files contained in double-quotes are first searched for 1811 * relative to the including file's location. We don't want to 1812 * cd there, of course, so we just tack on the old file's 1813 * leading path components and call Dir_FindFile to see if 1814 * we can locate the beast. 1815 */ 1816 char *prefEnd, *Fname; 1817 1818 /* Make a temporary copy of this, to be safe. */ 1819 Fname = estrdup(curFile.fname); 1820 1821 prefEnd = strrchr (Fname, '/'); 1822 if (prefEnd != (char *)NULL) { 1823 char *newName; 1824 1825 *prefEnd = '\0'; 1826 if (file[0] == '/') 1827 newName = estrdup(file); 1828 else 1829 newName = str_concat (Fname, file, STR_ADDSLASH); 1830 fullname = Dir_FindFile (newName, parseIncPath); 1831 if (fullname == (char *)NULL) { 1832 fullname = Dir_FindFile(newName, dirSearchPath); 1833 } 1834 free (newName); 1835 *prefEnd = '/'; 1836 } else { 1837 fullname = (char *)NULL; 1838 } 1839 free (Fname); 1840 if (fullname == (char *)NULL) { 1841 /* 1842 * Makefile wasn't found in same directory as included makefile. 1843 * Search for it first on the -I search path, 1844 * then on the .PATH search path, if not found in a -I directory. 1845 * XXX: Suffix specific? 1846 */ 1847 fullname = Dir_FindFile (file, parseIncPath); 1848 if (fullname == (char *)NULL) { 1849 fullname = Dir_FindFile(file, dirSearchPath); 1850 } 1851 } 1852 } 1853 1854 /* Looking for a system file or file still not found */ 1855 if (fullname == (char *)NULL) { 1856 /* 1857 * Look for it on the system path 1858 */ 1859 fullname = Dir_FindFile(file, Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath); 1860 } 1861 1862 if (fullname == (char *) NULL) { 1863 *cp = endc; 1864 if (!silent) 1865 Parse_Error (PARSE_FATAL, "Could not find %s", file); 1866 return; 1867 } 1868 1869 free(file); 1870 1871 /* 1872 * Once we find the absolute path to the file, we get to save all the 1873 * state from the current file before we can start reading this 1874 * include file. The state is stored in an IFile structure which 1875 * is placed on a list with other IFile structures. The list makes 1876 * a very nice stack to track how we got here... 1877 */ 1878 oldFile = (IFile *) emalloc (sizeof (IFile)); 1879 1880 memcpy(oldFile, &curFile, sizeof (IFile)); 1881 1882 (void) Lst_AtFront (includes, (ClientData)oldFile); 1883 1884 /* 1885 * Once the previous state has been saved, we can get down to reading 1886 * the new file. We set up the name of the file to be the absolute 1887 * name of the include file so error messages refer to the right 1888 * place. Naturally enough, we start reading at line number 0. 1889 */ 1890 curFile.fname = fullname; 1891 curFile.lineno = 0; 1892 1893 ParseSetParseFile(curFile.fname); 1894 1895 curFile.F = fopen (fullname, "r"); 1896 curFile.P = NULL; 1897 1898 if (curFile.F == (FILE * ) NULL) { 1899 if (!silent) 1900 Parse_Error (PARSE_FATAL, "Cannot open %s", fullname); 1901 /* 1902 * Pop to previous file 1903 */ 1904 (void) ParseEOF(0); 1905 } 1906 } 1907 1908 1909 /*- 1910 *--------------------------------------------------------------------- 1911 * ParseSetParseFile -- 1912 * Set the .PARSEDIR and .PARSEFILE variables to the dirname and 1913 * basename of the given filename 1914 * 1915 * Results: 1916 * None 1917 * 1918 * Side Effects: 1919 * The .PARSEDIR and .PARSEFILE variables are overwritten by the 1920 * dirname and basename of the given filename. 1921 *--------------------------------------------------------------------- 1922 */ 1923 static void 1924 ParseSetParseFile(filename) 1925 char *filename; 1926 { 1927 char *slash; 1928 1929 slash = strrchr(filename, '/'); 1930 if (slash == 0) { 1931 Var_Set(".PARSEDIR", ".", VAR_GLOBAL, 0); 1932 Var_Set(".PARSEFILE", filename, VAR_GLOBAL, 0); 1933 } else { 1934 *slash = '\0'; 1935 Var_Set(".PARSEDIR", filename, VAR_GLOBAL, 0); 1936 Var_Set(".PARSEFILE", slash+1, VAR_GLOBAL, 0); 1937 *slash = '/'; 1938 } 1939 } 1940 1941 1942 /*- 1943 *--------------------------------------------------------------------- 1944 * Parse_FromString -- 1945 * Start Parsing from the given string 1946 * 1947 * Results: 1948 * None 1949 * 1950 * Side Effects: 1951 * A structure is added to the includes Lst and readProc, lineno, 1952 * fname and curFILE are altered for the new file 1953 *--------------------------------------------------------------------- 1954 */ 1955 void 1956 Parse_FromString(str) 1957 char *str; 1958 { 1959 IFile *oldFile; /* state associated with this file */ 1960 1961 if (DEBUG(FOR)) 1962 (void) fprintf(stderr, "%s\n----\n", str); 1963 1964 oldFile = (IFile *) emalloc (sizeof (IFile)); 1965 memcpy(oldFile, &curFile, sizeof (IFile)); 1966 1967 (void) Lst_AtFront (includes, (ClientData)oldFile); 1968 1969 curFile.F = NULL; 1970 curFile.P = (PTR *) emalloc (sizeof (PTR)); 1971 curFile.P->str = curFile.P->ptr = str; 1972 curFile.lineno = 0; 1973 curFile.fname = estrdup(curFile.fname); 1974 } 1975 1976 1977 #ifdef SYSVINCLUDE 1978 /*- 1979 *--------------------------------------------------------------------- 1980 * ParseTraditionalInclude -- 1981 * Push to another file. 1982 * 1983 * The input is the current line. The file name(s) are 1984 * following the "include". 1985 * 1986 * Results: 1987 * None 1988 * 1989 * Side Effects: 1990 * A structure is added to the includes Lst and readProc, lineno, 1991 * fname and curFILE are altered for the new file 1992 *--------------------------------------------------------------------- 1993 */ 1994 static void 1995 ParseTraditionalInclude (line) 1996 char *line; 1997 { 1998 char *fullname; /* full pathname of file */ 1999 IFile *oldFile; /* state associated with current file */ 2000 char *cp; /* current position in file spec */ 2001 char *prefEnd; 2002 int done = 0; 2003 int silent = (line[0] != 'i') ? 1 : 0; 2004 char *file = &line[silent + 7]; 2005 char *cfname; 2006 size_t clineno; 2007 2008 cfname = curFile.fname; 2009 clineno = curFile.lineno; 2010 2011 /* 2012 * Skip over whitespace 2013 */ 2014 while (isspace((unsigned char)*file)) 2015 file++; 2016 2017 if (*file == '\0') { 2018 Parse_Error (PARSE_FATAL, 2019 "Filename missing from \"include\""); 2020 return; 2021 } 2022 2023 for (; !done; file = cp + 1) { 2024 /* 2025 * Skip to end of line or next whitespace 2026 */ 2027 for (cp = file; *cp && !isspace((unsigned char) *cp); cp++) 2028 continue; 2029 2030 if (*cp) 2031 *cp = '\0'; 2032 else 2033 done = 1; 2034 2035 /* 2036 * Substitute for any variables in the file name before trying to 2037 * find the thing. 2038 */ 2039 file = Var_Subst(NULL, file, VAR_CMD, FALSE); 2040 2041 /* 2042 * Now we know the file's name, we attempt to find the durn thing. 2043 * A return of NULL indicates the file don't exist. 2044 * 2045 * Include files are first searched for relative to the including 2046 * file's location. We don't want to cd there, of course, so we 2047 * just tack on the old file's leading path components and call 2048 * Dir_FindFile to see if we can locate the beast. 2049 * XXX - this *does* search in the current directory, right? 2050 */ 2051 2052 prefEnd = strrchr(cfname, '/'); 2053 if (prefEnd != NULL) { 2054 char *newName; 2055 2056 *prefEnd = '\0'; 2057 newName = str_concat(cfname, file, STR_ADDSLASH); 2058 fullname = Dir_FindFile(newName, parseIncPath); 2059 if (fullname == NULL) { 2060 fullname = Dir_FindFile(newName, dirSearchPath); 2061 } 2062 free (newName); 2063 *prefEnd = '/'; 2064 } else { 2065 fullname = NULL; 2066 } 2067 2068 if (fullname == NULL) { 2069 /* 2070 * System makefile or makefile wasn't found in same directory as 2071 * included makefile. Search for it first on the -I search path, 2072 * then on the .PATH search path, if not found in a 2073 * -I directory. XXX: Suffix specific? 2074 */ 2075 fullname = Dir_FindFile(file, parseIncPath); 2076 if (fullname == NULL) { 2077 fullname = Dir_FindFile(file, dirSearchPath); 2078 } 2079 } 2080 2081 if (fullname == NULL) { 2082 /* 2083 * Still haven't found the makefile. Look for it on the system 2084 * path as a last resort. 2085 */ 2086 fullname = Dir_FindFile(file, 2087 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath); 2088 } 2089 2090 if (fullname == NULL) { 2091 if (!silent) 2092 ParseErrorInternal(cfname, clineno, PARSE_FATAL, 2093 "Could not find %s", file); 2094 free(file); 2095 continue; 2096 } 2097 2098 free(file); 2099 2100 /* 2101 * Once we find the absolute path to the file, we get to save all 2102 * the state from the current file before we can start reading this 2103 * include file. The state is stored in an IFile structure which 2104 * is placed on a list with other IFile structures. The list makes 2105 * a very nice stack to track how we got here... 2106 */ 2107 oldFile = (IFile *) emalloc(sizeof(IFile)); 2108 memcpy(oldFile, &curFile, sizeof (IFile)); 2109 2110 (void) Lst_AtFront(includes, (ClientData)oldFile); 2111 2112 /* 2113 * Once the previous state has been saved, we can get down to 2114 * reading the new file. We set up the name of the file to be the 2115 * absolute name of the include file so error messages refer to the 2116 * right place. Naturally enough, we start reading at line number 0. 2117 */ 2118 curFile.fname = fullname; 2119 curFile.lineno = 0; 2120 2121 curFile.F = fopen(fullname, "r"); 2122 curFile.P = NULL; 2123 2124 if (curFile.F == NULL) { 2125 if (!silent) 2126 ParseErrorInternal(cfname, clineno, PARSE_FATAL, 2127 "Cannot open %s", fullname); 2128 /* 2129 * Pop to previous file 2130 */ 2131 (void) ParseEOF(1); 2132 } 2133 } 2134 } 2135 #endif 2136 2137 /*- 2138 *--------------------------------------------------------------------- 2139 * ParseEOF -- 2140 * Called when EOF is reached in the current file. If we were reading 2141 * an include file, the includes stack is popped and things set up 2142 * to go back to reading the previous file at the previous location. 2143 * 2144 * Results: 2145 * CONTINUE if there's more to do. DONE if not. 2146 * 2147 * Side Effects: 2148 * The old curFILE, is closed. The includes list is shortened. 2149 * lineno, curFILE, and fname are changed if CONTINUE is returned. 2150 *--------------------------------------------------------------------- 2151 */ 2152 static int 2153 ParseEOF (opened) 2154 int opened; 2155 { 2156 IFile *ifile; /* the state on the top of the includes stack */ 2157 2158 if (Lst_IsEmpty (includes)) { 2159 Var_Delete(".PARSEDIR", VAR_GLOBAL); 2160 Var_Delete(".PARSEFILE", VAR_GLOBAL); 2161 return (DONE); 2162 } 2163 2164 ifile = (IFile *) Lst_DeQueue (includes); 2165 2166 /* XXX dispose of curFile info */ 2167 free ((Address) curFile.fname); 2168 if (opened && curFile.F) 2169 (void) fclose (curFile.F); 2170 if (curFile.P) { 2171 free((Address) curFile.P->str); 2172 free((Address) curFile.P); 2173 } 2174 2175 memcpy(&curFile, ifile, sizeof (IFile)); 2176 2177 free ((Address)ifile); 2178 2179 /* pop the PARSEDIR/PARSEFILE variables */ 2180 ParseSetParseFile(curFile.fname); 2181 return (CONTINUE); 2182 } 2183 2184 /*- 2185 *--------------------------------------------------------------------- 2186 * ParseReadc -- 2187 * Read a character from the current file 2188 * 2189 * Results: 2190 * The character that was read 2191 * 2192 * Side Effects: 2193 *--------------------------------------------------------------------- 2194 */ 2195 static __inline int 2196 ParseReadc() 2197 { 2198 if (curFile.F) 2199 return fgetc(curFile.F); 2200 2201 if (curFile.P && *curFile.P->ptr) 2202 return *curFile.P->ptr++; 2203 return EOF; 2204 } 2205 2206 2207 /*- 2208 *--------------------------------------------------------------------- 2209 * ParseUnreadc -- 2210 * Put back a character to the current file 2211 * 2212 * Results: 2213 * None. 2214 * 2215 * Side Effects: 2216 *--------------------------------------------------------------------- 2217 */ 2218 static void 2219 ParseUnreadc(c) 2220 int c; 2221 { 2222 if (curFile.F) { 2223 ungetc(c, curFile.F); 2224 return; 2225 } 2226 if (curFile.P) { 2227 *--(curFile.P->ptr) = c; 2228 return; 2229 } 2230 } 2231 2232 2233 /* ParseSkipLine(): 2234 * Grab the next line 2235 */ 2236 static char * 2237 ParseSkipLine(skip) 2238 int skip; /* Skip lines that don't start with . */ 2239 { 2240 char *line; 2241 int c, lastc, lineLength = 0; 2242 Buffer buf; 2243 2244 buf = Buf_Init(MAKE_BSIZE); 2245 2246 do { 2247 Buf_Discard(buf, lineLength); 2248 lastc = '\0'; 2249 2250 while (((c = ParseReadc()) != '\n' || lastc == '\\') 2251 && c != EOF) { 2252 if (c == '\n') { 2253 Buf_ReplaceLastByte(buf, (Byte)' '); 2254 curFile.lineno++; 2255 2256 while ((c = ParseReadc()) == ' ' || c == '\t'); 2257 2258 if (c == EOF) 2259 break; 2260 } 2261 2262 Buf_AddByte(buf, (Byte)c); 2263 lastc = c; 2264 } 2265 2266 if (c == EOF) { 2267 Parse_Error(PARSE_FATAL, "Unclosed conditional/for loop"); 2268 Buf_Destroy(buf, TRUE); 2269 return((char *)NULL); 2270 } 2271 2272 curFile.lineno++; 2273 Buf_AddByte(buf, (Byte)'\0'); 2274 line = (char *)Buf_GetAll(buf, &lineLength); 2275 } while (skip == 1 && line[0] != '.'); 2276 2277 Buf_Destroy(buf, FALSE); 2278 return line; 2279 } 2280 2281 2282 /*- 2283 *--------------------------------------------------------------------- 2284 * ParseReadLine -- 2285 * Read an entire line from the input file. Called only by Parse_File. 2286 * To facilitate escaped newlines and what have you, a character is 2287 * buffered in 'lastc', which is '\0' when no characters have been 2288 * read. When we break out of the loop, c holds the terminating 2289 * character and lastc holds a character that should be added to 2290 * the line (unless we don't read anything but a terminator). 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 () 2301 { 2302 Buffer buf; /* Buffer for current line */ 2303 register int c; /* the current character */ 2304 register int lastc; /* The most-recent character */ 2305 Boolean semiNL; /* treat semi-colons as newlines */ 2306 Boolean ignDepOp; /* TRUE if should ignore dependency operators 2307 * for the purposes of setting semiNL */ 2308 Boolean ignComment; /* TRUE if should ignore comments (in a 2309 * shell command */ 2310 char *line; /* Result */ 2311 char *ep; /* to strip trailing blanks */ 2312 int lineLength; /* Length of result */ 2313 2314 semiNL = FALSE; 2315 ignDepOp = FALSE; 2316 ignComment = FALSE; 2317 2318 /* 2319 * Handle special-characters at the beginning of the line. Either a 2320 * leading tab (shell command) or pound-sign (possible conditional) 2321 * forces us to ignore comments and dependency operators and treat 2322 * semi-colons as semi-colons (by leaving semiNL FALSE). This also 2323 * discards completely blank lines. 2324 */ 2325 for (;;) { 2326 c = ParseReadc(); 2327 2328 if (c == '\t') { 2329 ignComment = ignDepOp = TRUE; 2330 break; 2331 } else if (c == '\n') { 2332 curFile.lineno++; 2333 } else if (c == '#') { 2334 ParseUnreadc(c); 2335 break; 2336 } else { 2337 /* 2338 * Anything else breaks out without doing anything 2339 */ 2340 break; 2341 } 2342 } 2343 2344 if (c != EOF) { 2345 lastc = c; 2346 buf = Buf_Init(MAKE_BSIZE); 2347 2348 while (((c = ParseReadc ()) != '\n' || (lastc == '\\')) && 2349 (c != EOF)) 2350 { 2351 test_char: 2352 switch(c) { 2353 case '\n': 2354 /* 2355 * Escaped newline: read characters until a non-space or an 2356 * unescaped newline and replace them all by a single space. 2357 * This is done by storing the space over the backslash and 2358 * dropping through with the next nonspace. If it is a 2359 * semi-colon and semiNL is TRUE, it will be recognized as a 2360 * newline in the code below this... 2361 */ 2362 curFile.lineno++; 2363 lastc = ' '; 2364 while ((c = ParseReadc ()) == ' ' || c == '\t') { 2365 continue; 2366 } 2367 if (c == EOF || c == '\n') { 2368 goto line_read; 2369 } else { 2370 /* 2371 * Check for comments, semiNL's, etc. -- easier than 2372 * ParseUnreadc(c); continue; 2373 */ 2374 goto test_char; 2375 } 2376 /*NOTREACHED*/ 2377 break; 2378 2379 case ';': 2380 /* 2381 * Semi-colon: Need to see if it should be interpreted as a 2382 * newline 2383 */ 2384 if (semiNL) { 2385 /* 2386 * To make sure the command that may be following this 2387 * semi-colon begins with a tab, we push one back into the 2388 * input stream. This will overwrite the semi-colon in the 2389 * buffer. If there is no command following, this does no 2390 * harm, since the newline remains in the buffer and the 2391 * whole line is ignored. 2392 */ 2393 ParseUnreadc('\t'); 2394 goto line_read; 2395 } 2396 break; 2397 case '=': 2398 if (!semiNL) { 2399 /* 2400 * Haven't seen a dependency operator before this, so this 2401 * must be a variable assignment -- don't pay attention to 2402 * dependency operators after this. 2403 */ 2404 ignDepOp = TRUE; 2405 } else if (lastc == ':' || lastc == '!') { 2406 /* 2407 * Well, we've seen a dependency operator already, but it 2408 * was the previous character, so this is really just an 2409 * expanded variable assignment. Revert semi-colons to 2410 * being just semi-colons again and ignore any more 2411 * dependency operators. 2412 * 2413 * XXX: Note that a line like "foo : a:=b" will blow up, 2414 * but who'd write a line like that anyway? 2415 */ 2416 ignDepOp = TRUE; semiNL = FALSE; 2417 } 2418 break; 2419 case '#': 2420 if (!ignComment) { 2421 if ( 2422 #if 0 2423 compatMake && 2424 #endif 2425 (lastc != '\\')) { 2426 /* 2427 * If the character is a hash mark and it isn't escaped 2428 * (or we're being compatible), the thing is a comment. 2429 * Skip to the end of the line. 2430 */ 2431 do { 2432 c = ParseReadc(); 2433 } while ((c != '\n') && (c != EOF)); 2434 goto line_read; 2435 } else { 2436 /* 2437 * Don't add the backslash. Just let the # get copied 2438 * over. 2439 */ 2440 lastc = c; 2441 continue; 2442 } 2443 } 2444 break; 2445 case ':': 2446 case '!': 2447 if (!ignDepOp && (c == ':' || c == '!')) { 2448 /* 2449 * A semi-colon is recognized as a newline only on 2450 * dependency lines. Dependency lines are lines with a 2451 * colon or an exclamation point. Ergo... 2452 */ 2453 semiNL = TRUE; 2454 } 2455 break; 2456 } 2457 /* 2458 * Copy in the previous character and save this one in lastc. 2459 */ 2460 Buf_AddByte (buf, (Byte)lastc); 2461 lastc = c; 2462 2463 } 2464 line_read: 2465 curFile.lineno++; 2466 2467 if (lastc != '\0') { 2468 Buf_AddByte (buf, (Byte)lastc); 2469 } 2470 Buf_AddByte (buf, (Byte)'\0'); 2471 line = (char *)Buf_GetAll (buf, &lineLength); 2472 Buf_Destroy (buf, FALSE); 2473 2474 /* 2475 * Strip trailing blanks and tabs from the line. 2476 * Do not strip a blank or tab that is preceded by 2477 * a '\' 2478 */ 2479 ep = line; 2480 while (*ep) 2481 ++ep; 2482 while (ep > line + 1 && (ep[-1] == ' ' || ep[-1] == '\t')) { 2483 if (ep > line + 1 && ep[-2] == '\\') 2484 break; 2485 --ep; 2486 } 2487 *ep = 0; 2488 2489 if (line[0] == '.') { 2490 /* 2491 * The line might be a conditional. Ask the conditional module 2492 * about it and act accordingly 2493 */ 2494 switch (Cond_Eval (line)) { 2495 case COND_SKIP: 2496 /* 2497 * Skip to next conditional that evaluates to COND_PARSE. 2498 */ 2499 do { 2500 free (line); 2501 line = ParseSkipLine(1); 2502 } while (line && Cond_Eval(line) != COND_PARSE); 2503 if (line == NULL) 2504 break; 2505 /*FALLTHRU*/ 2506 case COND_PARSE: 2507 free ((Address) line); 2508 line = ParseReadLine(); 2509 break; 2510 case COND_INVALID: 2511 if (For_Eval(line)) { 2512 int ok; 2513 free(line); 2514 do { 2515 /* 2516 * Skip after the matching end 2517 */ 2518 line = ParseSkipLine(0); 2519 if (line == NULL) { 2520 Parse_Error (PARSE_FATAL, 2521 "Unexpected end of file in for loop.\n"); 2522 break; 2523 } 2524 ok = For_Eval(line); 2525 free(line); 2526 } 2527 while (ok); 2528 if (line != NULL) 2529 For_Run(); 2530 line = ParseReadLine(); 2531 } 2532 break; 2533 } 2534 } 2535 return (line); 2536 2537 } else { 2538 /* 2539 * Hit end-of-file, so return a NULL line to indicate this. 2540 */ 2541 return((char *)NULL); 2542 } 2543 } 2544 2545 /*- 2546 *----------------------------------------------------------------------- 2547 * ParseFinishLine -- 2548 * Handle the end of a dependency group. 2549 * 2550 * Results: 2551 * Nothing. 2552 * 2553 * Side Effects: 2554 * inLine set FALSE. 'targets' list destroyed. 2555 * 2556 *----------------------------------------------------------------------- 2557 */ 2558 static void 2559 ParseFinishLine() 2560 { 2561 if (inLine) { 2562 Lst_ForEach(targets, Suff_EndTransform, (ClientData)NULL); 2563 Lst_Destroy (targets, ParseHasCommands); 2564 targets = NULL; 2565 inLine = FALSE; 2566 } 2567 } 2568 2569 2570 /*- 2571 *--------------------------------------------------------------------- 2572 * Parse_File -- 2573 * Parse a file into its component parts, incorporating it into the 2574 * current dependency graph. This is the main function and controls 2575 * almost every other function in this module 2576 * 2577 * Results: 2578 * None 2579 * 2580 * Side Effects: 2581 * Loads. Nodes are added to the list of all targets, nodes and links 2582 * are added to the dependency graph. etc. etc. etc. 2583 *--------------------------------------------------------------------- 2584 */ 2585 void 2586 Parse_File(name, stream) 2587 char *name; /* the name of the file being read */ 2588 FILE * stream; /* Stream open to makefile to parse */ 2589 { 2590 register char *cp, /* pointer into the line */ 2591 *line; /* the line we're working on */ 2592 2593 inLine = FALSE; 2594 fatals = 0; 2595 2596 curFile.fname = name; 2597 curFile.F = stream; 2598 curFile.lineno = 0; 2599 2600 ParseSetParseFile(curFile.fname); 2601 2602 do { 2603 while ((line = ParseReadLine ()) != NULL) { 2604 if (*line == '.') { 2605 /* 2606 * Lines that begin with the special character are either 2607 * include or undef directives. 2608 */ 2609 for (cp = line + 1; isspace ((unsigned char)*cp); cp++) { 2610 continue; 2611 } 2612 if (strncmp(cp, "include", 7) == 0 || 2613 ((cp[0] == 's' || cp[0] == '-') && 2614 strncmp(&cp[1], "include", 7) == 0)) { 2615 ParseDoInclude (cp); 2616 goto nextLine; 2617 } else if (strncmp(cp, "undef", 5) == 0) { 2618 char *cp2; 2619 for (cp += 5; isspace((unsigned char) *cp); cp++) { 2620 continue; 2621 } 2622 2623 for (cp2 = cp; !isspace((unsigned char) *cp2) && 2624 (*cp2 != '\0'); cp2++) { 2625 continue; 2626 } 2627 2628 *cp2 = '\0'; 2629 2630 Var_Delete(cp, VAR_GLOBAL); 2631 goto nextLine; 2632 } 2633 } 2634 if (*line == '#') { 2635 /* If we're this far, the line must be a comment. */ 2636 goto nextLine; 2637 } 2638 2639 if (*line == '\t') { 2640 /* 2641 * If a line starts with a tab, it can only hope to be 2642 * a creation command. 2643 */ 2644 #ifndef POSIX 2645 shellCommand: 2646 #endif 2647 for (cp = line + 1; isspace ((unsigned char)*cp); cp++) { 2648 continue; 2649 } 2650 if (*cp) { 2651 if (inLine) { 2652 /* 2653 * So long as it's not a blank line and we're actually 2654 * in a dependency spec, add the command to the list of 2655 * commands of all targets in the dependency spec 2656 */ 2657 Lst_ForEach (targets, ParseAddCmd, cp); 2658 #ifdef CLEANUP 2659 Lst_AtEnd(targCmds, (ClientData) line); 2660 #endif 2661 continue; 2662 } else { 2663 Parse_Error (PARSE_FATAL, 2664 "Unassociated shell command \"%s\"", 2665 cp); 2666 } 2667 } 2668 #ifdef SYSVINCLUDE 2669 } else if (((strncmp(line, "include", 7) == 0 && 2670 isspace((unsigned char) line[7])) || 2671 ((line[0] == 's' || line[0] == '-') && 2672 strncmp(&line[1], "include", 7) == 0 && 2673 isspace((unsigned char) line[8]))) && 2674 strchr(line, ':') == NULL) { 2675 /* 2676 * It's an S3/S5-style "include". 2677 */ 2678 ParseTraditionalInclude (line); 2679 goto nextLine; 2680 #endif 2681 } else if (Parse_IsVar (line)) { 2682 ParseFinishLine(); 2683 Parse_DoVar (line, VAR_GLOBAL); 2684 } else { 2685 /* 2686 * We now know it's a dependency line so it needs to have all 2687 * variables expanded before being parsed. Tell the variable 2688 * module to complain if some variable is undefined... 2689 * To make life easier on novices, if the line is indented we 2690 * first make sure the line has a dependency operator in it. 2691 * If it doesn't have an operator and we're in a dependency 2692 * line's script, we assume it's actually a shell command 2693 * and add it to the current list of targets. 2694 */ 2695 #ifndef POSIX 2696 Boolean nonSpace = FALSE; 2697 #endif 2698 2699 cp = line; 2700 if (isspace((unsigned char) line[0])) { 2701 while ((*cp != '\0') && isspace((unsigned char) *cp)) { 2702 cp++; 2703 } 2704 if (*cp == '\0') { 2705 goto nextLine; 2706 } 2707 #ifndef POSIX 2708 while (*cp && (ParseIsEscaped(line, cp) || 2709 (*cp != ':') && (*cp != '!'))) { 2710 nonSpace = TRUE; 2711 cp++; 2712 } 2713 #endif 2714 } 2715 2716 #ifndef POSIX 2717 if (*cp == '\0') { 2718 if (inLine) { 2719 Parse_Error (PARSE_WARNING, 2720 "Shell command needs a leading tab"); 2721 goto shellCommand; 2722 } else if (nonSpace) { 2723 Parse_Error (PARSE_FATAL, "Missing operator"); 2724 } 2725 } else { 2726 #endif 2727 ParseFinishLine(); 2728 2729 cp = Var_Subst (NULL, line, VAR_CMD, TRUE); 2730 free (line); 2731 line = cp; 2732 2733 /* 2734 * Need a non-circular list for the target nodes 2735 */ 2736 if (targets) 2737 Lst_Destroy(targets, NOFREE); 2738 2739 targets = Lst_Init (FALSE); 2740 inLine = TRUE; 2741 2742 ParseDoDependency (line); 2743 #ifndef POSIX 2744 } 2745 #endif 2746 } 2747 2748 nextLine: 2749 2750 free (line); 2751 } 2752 /* 2753 * Reached EOF, but it may be just EOF of an include file... 2754 */ 2755 } while (ParseEOF(1) == CONTINUE); 2756 2757 /* 2758 * Make sure conditionals are clean 2759 */ 2760 Cond_End(); 2761 2762 if (fatals) { 2763 (void)fprintf(stderr, 2764 "%s: Fatal errors encountered -- cannot continue\n", 2765 progname); 2766 PrintOnError(NULL); 2767 exit (1); 2768 } 2769 } 2770 2771 /*- 2772 *--------------------------------------------------------------------- 2773 * Parse_Init -- 2774 * initialize the parsing module 2775 * 2776 * Results: 2777 * none 2778 * 2779 * Side Effects: 2780 * the parseIncPath list is initialized... 2781 *--------------------------------------------------------------------- 2782 */ 2783 void 2784 Parse_Init () 2785 { 2786 mainNode = NILGNODE; 2787 parseIncPath = Lst_Init (FALSE); 2788 sysIncPath = Lst_Init (FALSE); 2789 defIncPath = Lst_Init (FALSE); 2790 includes = Lst_Init (FALSE); 2791 #ifdef CLEANUP 2792 targCmds = Lst_Init (FALSE); 2793 #endif 2794 } 2795 2796 void 2797 Parse_End() 2798 { 2799 #ifdef CLEANUP 2800 Lst_Destroy(targCmds, (void (*) __P((ClientData))) free); 2801 if (targets) 2802 Lst_Destroy(targets, NOFREE); 2803 Lst_Destroy(defIncPath, Dir_Destroy); 2804 Lst_Destroy(sysIncPath, Dir_Destroy); 2805 Lst_Destroy(parseIncPath, Dir_Destroy); 2806 Lst_Destroy(includes, NOFREE); /* Should be empty now */ 2807 #endif 2808 } 2809 2810 2811 /*- 2812 *----------------------------------------------------------------------- 2813 * Parse_MainName -- 2814 * Return a Lst of the main target to create for main()'s sake. If 2815 * no such target exists, we Punt with an obnoxious error message. 2816 * 2817 * Results: 2818 * A Lst of the single node to create. 2819 * 2820 * Side Effects: 2821 * None. 2822 * 2823 *----------------------------------------------------------------------- 2824 */ 2825 Lst 2826 Parse_MainName() 2827 { 2828 Lst mainList; /* result list */ 2829 2830 mainList = Lst_Init (FALSE); 2831 2832 if (mainNode == NILGNODE) { 2833 Punt ("no target to make."); 2834 /*NOTREACHED*/ 2835 } else if (mainNode->type & OP_DOUBLEDEP) { 2836 (void) Lst_AtEnd (mainList, (ClientData)mainNode); 2837 Lst_Concat(mainList, mainNode->cohorts, LST_CONCNEW); 2838 } 2839 else 2840 (void) Lst_AtEnd (mainList, (ClientData)mainNode); 2841 Var_Append(".TARGETS", mainNode->name, VAR_GLOBAL); 2842 return (mainList); 2843 } 2844 2845 /*- 2846 *----------------------------------------------------------------------- 2847 * ParseMark -- 2848 * Add the filename and lineno to the GNode so that we remember 2849 * where it was first defined. 2850 * 2851 * Side Effects: 2852 * None. 2853 * 2854 *----------------------------------------------------------------------- 2855 */ 2856 static void 2857 ParseMark(gn) 2858 GNode *gn; 2859 { 2860 gn->fname = strdup(curFile.fname); 2861 gn->lineno = curFile.lineno; 2862 } 2863