1 /* $NetBSD: parse.c,v 1.63 2001/02/23 21:11:38 christos 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 1.63 2001/02/23 21:11:38 christos 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 1.63 2001/02/23 21:11:38 christos 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 char *fname; /* name of current file (for errors) */ 130 static int lineno; /* line number in current file */ 131 static FILE *curFILE = NULL; /* current makefile */ 132 133 static PTR *curPTR = NULL; /* current makefile */ 134 135 static int fatals = 0; 136 137 static GNode *mainNode; /* The main target to create. This is the 138 * first target on the first dependency 139 * line in the first makefile */ 140 /* 141 * Definitions for handling #include specifications 142 */ 143 typedef struct IFile { 144 char *fname; /* name of previous file */ 145 int lineno; /* saved line number */ 146 FILE * F; /* the open stream */ 147 PTR * p; /* the char pointer */ 148 } IFile; 149 150 static Lst includes; /* stack of IFiles generated by 151 * #includes */ 152 Lst parseIncPath; /* list of directories for "..." includes */ 153 Lst sysIncPath; /* list of directories for <...> includes */ 154 155 /*- 156 * specType contains the SPECial TYPE of the current target. It is 157 * Not if the target is unspecial. If it *is* special, however, the children 158 * are linked as children of the parent but not vice versa. This variable is 159 * set in ParseDoDependency 160 */ 161 typedef enum { 162 Begin, /* .BEGIN */ 163 Default, /* .DEFAULT */ 164 End, /* .END */ 165 Ignore, /* .IGNORE */ 166 Includes, /* .INCLUDES */ 167 Interrupt, /* .INTERRUPT */ 168 Libs, /* .LIBS */ 169 MFlags, /* .MFLAGS or .MAKEFLAGS */ 170 Main, /* .MAIN and we don't have anything user-specified to 171 * make */ 172 NoExport, /* .NOEXPORT */ 173 NoPath, /* .NOPATH */ 174 Not, /* Not special */ 175 NotParallel, /* .NOTPARALELL */ 176 Null, /* .NULL */ 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 /* 197 * Predecessor node for handling .ORDER. Initialized to NILGNODE when .ORDER 198 * seen, then set to each successive source on the line. 199 */ 200 static GNode *predecessor; 201 202 /* 203 * The parseKeywords table is searched using binary search when deciding 204 * if a target or source is special. The 'spec' field is the ParseSpecial 205 * type of the keyword ("Not" if the keyword isn't special as a target) while 206 * the 'op' field is the operator to apply to the list of targets if the 207 * keyword is used as a source ("0" if the keyword isn't special as a source) 208 */ 209 static struct { 210 char *name; /* Name of keyword */ 211 ParseSpecial spec; /* Type when used as a target */ 212 int op; /* Operator when used as a source */ 213 } parseKeywords[] = { 214 { ".BEGIN", Begin, 0 }, 215 { ".DEFAULT", Default, 0 }, 216 { ".END", End, 0 }, 217 { ".EXEC", Attribute, OP_EXEC }, 218 { ".IGNORE", Ignore, OP_IGNORE }, 219 { ".INCLUDES", Includes, 0 }, 220 { ".INTERRUPT", Interrupt, 0 }, 221 { ".INVISIBLE", Attribute, OP_INVISIBLE }, 222 { ".JOIN", Attribute, OP_JOIN }, 223 { ".LIBS", Libs, 0 }, 224 { ".MADE", Attribute, OP_MADE }, 225 { ".MAIN", Main, 0 }, 226 { ".MAKE", Attribute, OP_MAKE }, 227 { ".MAKEFLAGS", MFlags, 0 }, 228 { ".MFLAGS", MFlags, 0 }, 229 { ".NOPATH", NoPath, OP_NOPATH }, 230 { ".NOTMAIN", Attribute, OP_NOTMAIN }, 231 { ".NOTPARALLEL", NotParallel, 0 }, 232 { ".NO_PARALLEL", NotParallel, 0 }, 233 { ".NULL", Null, 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 { ".WAIT", Wait, 0 }, 250 }; 251 252 static void ParseErrorInternal __P((char *, size_t, int, char *, ...)) 253 __attribute__((__format__(__printf__, 4, 5))); 254 static void ParseVErrorInternal __P((char *, size_t, int, char *, va_list)) 255 __attribute__((__format__(__printf__, 4, 0))); 256 static int ParseFindKeyword __P((char *)); 257 static int ParseLinkSrc __P((ClientData, ClientData)); 258 static int ParseDoOp __P((ClientData, ClientData)); 259 static int ParseAddDep __P((ClientData, ClientData)); 260 static void ParseDoSrc __P((int, char *, Lst)); 261 static int ParseFindMain __P((ClientData, ClientData)); 262 static int ParseAddDir __P((ClientData, ClientData)); 263 static int ParseClearPath __P((ClientData, ClientData)); 264 static void ParseDoDependency __P((char *)); 265 static int ParseAddCmd __P((ClientData, ClientData)); 266 static __inline int ParseReadc __P((void)); 267 static void ParseUnreadc __P((int)); 268 static void ParseHasCommands __P((ClientData)); 269 static void ParseDoInclude __P((char *)); 270 static void ParseSetParseFile __P((char *)); 271 #ifdef SYSVINCLUDE 272 static void ParseTraditionalInclude __P((char *)); 273 #endif 274 static int ParseEOF __P((int)); 275 static char *ParseReadLine __P((void)); 276 static char *ParseSkipLine __P((int)); 277 static void ParseFinishLine __P((void)); 278 static void ParseMark __P((GNode *)); 279 280 extern int maxJobs; 281 282 /*- 283 *---------------------------------------------------------------------- 284 * ParseFindKeyword -- 285 * Look in the table of keywords for one matching the given string. 286 * 287 * Results: 288 * The index of the keyword, or -1 if it isn't there. 289 * 290 * Side Effects: 291 * None 292 *---------------------------------------------------------------------- 293 */ 294 static int 295 ParseFindKeyword (str) 296 char *str; /* String to find */ 297 { 298 register int start, 299 end, 300 cur; 301 register int diff; 302 303 start = 0; 304 end = (sizeof(parseKeywords)/sizeof(parseKeywords[0])) - 1; 305 306 do { 307 cur = start + ((end - start) / 2); 308 diff = strcmp (str, parseKeywords[cur].name); 309 310 if (diff == 0) { 311 return (cur); 312 } else if (diff < 0) { 313 end = cur - 1; 314 } else { 315 start = cur + 1; 316 } 317 } while (start <= end); 318 return (-1); 319 } 320 321 /*- 322 * ParseVErrorInternal -- 323 * Error message abort function for parsing. Prints out the context 324 * of the error (line number and file) as well as the message with 325 * two optional arguments. 326 * 327 * Results: 328 * None 329 * 330 * Side Effects: 331 * "fatals" is incremented if the level is PARSE_FATAL. 332 */ 333 /* VARARGS */ 334 static void 335 #ifdef __STDC__ 336 ParseVErrorInternal(char *cfname, size_t clineno, int type, char *fmt, 337 va_list ap) 338 #else 339 ParseVErrorInternal(va_alist) 340 va_dcl 341 #endif 342 { 343 static Boolean fatal_warning_error_printed = FALSE; 344 345 (void)fprintf(stderr, "%s: \"", progname); 346 347 if (*cfname != '/') { 348 char *cp, *dir; 349 350 /* 351 * Nothing is more anoying than not knowing which Makefile 352 * is the culprit. 353 */ 354 dir = Var_Value(".PARSEDIR", VAR_GLOBAL, &cp); 355 if (dir == NULL || *dir == '\0' || 356 (*dir == '.' && dir[1] == '\0')) 357 dir = Var_Value(".CURDIR", VAR_GLOBAL, &cp); 358 if (dir == NULL) 359 dir = "."; 360 361 (void)fprintf(stderr, "%s/%s", dir, cfname); 362 } else 363 (void)fprintf(stderr, "%s", cfname); 364 365 (void)fprintf(stderr, "\" line %d: ", (int)clineno); 366 if (type == PARSE_WARNING) 367 (void)fprintf(stderr, "warning: "); 368 (void)vfprintf(stderr, fmt, ap); 369 va_end(ap); 370 (void)fprintf(stderr, "\n"); 371 (void)fflush(stderr); 372 if (type == PARSE_FATAL || parseWarnFatal) 373 fatals += 1; 374 if (parseWarnFatal && !fatal_warning_error_printed) { 375 Error("parsing warnings being treated as errors"); 376 fatal_warning_error_printed = TRUE; 377 } 378 } 379 380 /*- 381 * ParseErrorInternal -- 382 * Error function 383 * 384 * Results: 385 * None 386 * 387 * Side Effects: 388 * None 389 */ 390 /* VARARGS */ 391 static void 392 #ifdef __STDC__ 393 ParseErrorInternal(char *cfname, size_t clineno, int type, char *fmt, ...) 394 #else 395 ParseErrorInternal(va_alist) 396 va_dcl 397 #endif 398 { 399 va_list ap; 400 #ifdef __STDC__ 401 va_start(ap, fmt); 402 #else 403 int type; /* Error type (PARSE_WARNING, PARSE_FATAL) */ 404 char *fmt; 405 char *cfname; 406 size_t clineno; 407 408 va_start(ap); 409 cfname = va_arg(ap, char *); 410 clineno = va_arg(ap, size_t); 411 type = va_arg(ap, int); 412 fmt = va_arg(ap, char *); 413 #endif 414 415 ParseVErrorInternal(cfname, clineno, type, fmt, ap); 416 va_end(ap); 417 } 418 419 /*- 420 * Parse_Error -- 421 * External interface to ParseErrorInternal; uses the default filename 422 * Line number. 423 * 424 * Results: 425 * None 426 * 427 * Side Effects: 428 * None 429 */ 430 /* VARARGS */ 431 void 432 #ifdef __STDC__ 433 Parse_Error(int type, char *fmt, ...) 434 #else 435 Parse_Error(va_alist) 436 va_dcl 437 #endif 438 { 439 va_list ap; 440 #ifdef __STDC__ 441 va_start(ap, fmt); 442 #else 443 int type; /* Error type (PARSE_WARNING, PARSE_FATAL) */ 444 char *fmt; 445 446 va_start(ap); 447 type = va_arg(ap, int); 448 fmt = va_arg(ap, char *); 449 #endif 450 ParseVErrorInternal(fname, lineno, type, fmt, ap); 451 va_end(ap); 452 } 453 454 /*- 455 *--------------------------------------------------------------------- 456 * ParseLinkSrc -- 457 * Link the parent node to its new child. Used in a Lst_ForEach by 458 * ParseDoDependency. If the specType isn't 'Not', the parent 459 * isn't linked as a parent of the child. 460 * 461 * Results: 462 * Always = 0 463 * 464 * Side Effects: 465 * New elements are added to the parents list of cgn and the 466 * children list of cgn. the unmade field of pgn is updated 467 * to reflect the additional child. 468 *--------------------------------------------------------------------- 469 */ 470 static int 471 ParseLinkSrc (pgnp, cgnp) 472 ClientData pgnp; /* The parent node */ 473 ClientData cgnp; /* The child node */ 474 { 475 GNode *pgn = (GNode *) pgnp; 476 GNode *cgn = (GNode *) cgnp; 477 478 if ((pgn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (pgn->cohorts)) 479 pgn = (GNode *) Lst_Datum (Lst_Last (pgn->cohorts)); 480 (void)Lst_AtEnd (pgn->children, (ClientData)cgn); 481 if (specType == Not) 482 (void)Lst_AtEnd (cgn->parents, (ClientData)pgn); 483 pgn->unmade += 1; 484 return (0); 485 } 486 487 /*- 488 *--------------------------------------------------------------------- 489 * ParseDoOp -- 490 * Apply the parsed operator to the given target node. Used in a 491 * Lst_ForEach call by ParseDoDependency once all targets have 492 * been found and their operator parsed. If the previous and new 493 * operators are incompatible, a major error is taken. 494 * 495 * Results: 496 * Always 0 497 * 498 * Side Effects: 499 * The type field of the node is altered to reflect any new bits in 500 * the op. 501 *--------------------------------------------------------------------- 502 */ 503 static int 504 ParseDoOp (gnp, opp) 505 ClientData gnp; /* The node to which the operator is to be 506 * applied */ 507 ClientData opp; /* The operator to apply */ 508 { 509 GNode *gn = (GNode *) gnp; 510 int op = *(int *) opp; 511 /* 512 * If the dependency mask of the operator and the node don't match and 513 * the node has actually had an operator applied to it before, and 514 * the operator actually has some dependency information in it, complain. 515 */ 516 if (((op & OP_OPMASK) != (gn->type & OP_OPMASK)) && 517 !OP_NOP(gn->type) && !OP_NOP(op)) 518 { 519 Parse_Error (PARSE_FATAL, "Inconsistent operator for %s", gn->name); 520 return (1); 521 } 522 523 if ((op == OP_DOUBLEDEP) && ((gn->type & OP_OPMASK) == OP_DOUBLEDEP)) { 524 /* 525 * If the node was the object of a :: operator, we need to create a 526 * new instance of it for the children and commands on this dependency 527 * line. The new instance is placed on the 'cohorts' list of the 528 * initial one (note the initial one is not on its own cohorts list) 529 * and the new instance is linked to all parents of the initial 530 * instance. 531 */ 532 register GNode *cohort; 533 534 /* 535 * Propagate copied bits to the initial node. They'll be propagated 536 * back to the rest of the cohorts later. 537 */ 538 gn->type |= op & ~OP_OPMASK; 539 540 cohort = Targ_NewGN(gn->name); 541 /* 542 * Make the cohort invisible as well to avoid duplicating it into 543 * other variables. True, parents of this target won't tend to do 544 * anything with their local variables, but better safe than 545 * sorry. (I think this is pointless now, since the relevant list 546 * traversals will no longer see this node anyway. -mycroft) 547 */ 548 cohort->type = op | OP_INVISIBLE; 549 (void)Lst_AtEnd(gn->cohorts, (ClientData)cohort); 550 } else { 551 /* 552 * We don't want to nuke any previous flags (whatever they were) so we 553 * just OR the new operator into the old 554 */ 555 gn->type |= op; 556 } 557 558 return (0); 559 } 560 561 /*- 562 *--------------------------------------------------------------------- 563 * ParseAddDep -- 564 * Check if the pair of GNodes given needs to be synchronized. 565 * This has to be when two nodes are on different sides of a 566 * .WAIT directive. 567 * 568 * Results: 569 * Returns 1 if the two targets need to be ordered, 0 otherwise. 570 * If it returns 1, the search can stop 571 * 572 * Side Effects: 573 * A dependency can be added between the two nodes. 574 * 575 *--------------------------------------------------------------------- 576 */ 577 static int 578 ParseAddDep(pp, sp) 579 ClientData pp; 580 ClientData sp; 581 { 582 GNode *p = (GNode *) pp; 583 GNode *s = (GNode *) sp; 584 585 if (p->order < s->order) { 586 /* 587 * XXX: This can cause loops, and loops can cause unmade targets, 588 * but checking is tedious, and the debugging output can show the 589 * problem 590 */ 591 (void)Lst_AtEnd(p->successors, (ClientData)s); 592 (void)Lst_AtEnd(s->preds, (ClientData)p); 593 return 0; 594 } 595 else 596 return 1; 597 } 598 599 600 /*- 601 *--------------------------------------------------------------------- 602 * ParseDoSrc -- 603 * Given the name of a source, figure out if it is an attribute 604 * and apply it to the targets if it is. Else decide if there is 605 * some attribute which should be applied *to* the source because 606 * of some special target and apply it if so. Otherwise, make the 607 * source be a child of the targets in the list 'targets' 608 * 609 * Results: 610 * None 611 * 612 * Side Effects: 613 * Operator bits may be added to the list of targets or to the source. 614 * The targets may have a new source added to their lists of children. 615 *--------------------------------------------------------------------- 616 */ 617 static void 618 ParseDoSrc (tOp, src, allsrc) 619 int tOp; /* operator (if any) from special targets */ 620 char *src; /* name of the source to handle */ 621 Lst allsrc; /* List of all sources to wait for */ 622 623 { 624 GNode *gn = NULL; 625 626 if (*src == '.' && isupper ((unsigned char)src[1])) { 627 int keywd = ParseFindKeyword(src); 628 if (keywd != -1) { 629 int op = parseKeywords[keywd].op; 630 if (op != 0) { 631 Lst_ForEach (targets, ParseDoOp, (ClientData)&op); 632 return; 633 } 634 if (parseKeywords[keywd].spec == Wait) { 635 waiting++; 636 return; 637 } 638 } 639 } 640 641 switch (specType) { 642 case Main: 643 /* 644 * If we have noted the existence of a .MAIN, it means we need 645 * to add the sources of said target to the list of things 646 * to create. The string 'src' is likely to be free, so we 647 * must make a new copy of it. Note that this will only be 648 * invoked if the user didn't specify a target on the command 649 * line. This is to allow #ifmake's to succeed, or something... 650 */ 651 (void) Lst_AtEnd (create, (ClientData)estrdup(src)); 652 /* 653 * Add the name to the .TARGETS variable as well, so the user cna 654 * employ that, if desired. 655 */ 656 Var_Append(".TARGETS", src, VAR_GLOBAL); 657 return; 658 659 case Order: 660 /* 661 * Create proper predecessor/successor links between the previous 662 * source and the current one. 663 */ 664 gn = Targ_FindNode(src, TARG_CREATE); 665 if (predecessor != NILGNODE) { 666 (void)Lst_AtEnd(predecessor->successors, (ClientData)gn); 667 (void)Lst_AtEnd(gn->preds, (ClientData)predecessor); 668 } 669 /* 670 * The current source now becomes the predecessor for the next one. 671 */ 672 predecessor = gn; 673 break; 674 675 default: 676 /* 677 * If the source is not an attribute, we need to find/create 678 * a node for it. After that we can apply any operator to it 679 * from a special target or link it to its parents, as 680 * appropriate. 681 * 682 * In the case of a source that was the object of a :: operator, 683 * the attribute is applied to all of its instances (as kept in 684 * the 'cohorts' list of the node) or all the cohorts are linked 685 * to all the targets. 686 */ 687 gn = Targ_FindNode (src, TARG_CREATE); 688 if (tOp) { 689 gn->type |= tOp; 690 } else { 691 Lst_ForEach (targets, ParseLinkSrc, (ClientData)gn); 692 } 693 break; 694 } 695 696 gn->order = waiting; 697 (void)Lst_AtEnd(allsrc, (ClientData)gn); 698 if (waiting) { 699 Lst_ForEach(allsrc, ParseAddDep, (ClientData)gn); 700 } 701 } 702 703 /*- 704 *----------------------------------------------------------------------- 705 * ParseFindMain -- 706 * Find a real target in the list and set it to be the main one. 707 * Called by ParseDoDependency when a main target hasn't been found 708 * yet. 709 * 710 * Results: 711 * 0 if main not found yet, 1 if it is. 712 * 713 * Side Effects: 714 * mainNode is changed and Targ_SetMain is called. 715 * 716 *----------------------------------------------------------------------- 717 */ 718 static int 719 ParseFindMain(gnp, dummy) 720 ClientData gnp; /* Node to examine */ 721 ClientData dummy; 722 { 723 GNode *gn = (GNode *) gnp; 724 if ((gn->type & OP_NOTARGET) == 0) { 725 mainNode = gn; 726 Targ_SetMain(gn); 727 return (dummy ? 1 : 1); 728 } else { 729 return (dummy ? 0 : 0); 730 } 731 } 732 733 /*- 734 *----------------------------------------------------------------------- 735 * ParseAddDir -- 736 * Front-end for Dir_AddDir to make sure Lst_ForEach keeps going 737 * 738 * Results: 739 * === 0 740 * 741 * Side Effects: 742 * See Dir_AddDir. 743 * 744 *----------------------------------------------------------------------- 745 */ 746 static int 747 ParseAddDir(path, name) 748 ClientData path; 749 ClientData name; 750 { 751 (void) Dir_AddDir((Lst) path, (char *) name); 752 return(0); 753 } 754 755 /*- 756 *----------------------------------------------------------------------- 757 * ParseClearPath -- 758 * Front-end for Dir_ClearPath to make sure Lst_ForEach keeps going 759 * 760 * Results: 761 * === 0 762 * 763 * Side Effects: 764 * See Dir_ClearPath 765 * 766 *----------------------------------------------------------------------- 767 */ 768 static int 769 ParseClearPath(path, dummy) 770 ClientData path; 771 ClientData dummy; 772 { 773 Dir_ClearPath((Lst) path); 774 return(dummy ? 0 : 0); 775 } 776 777 /*- 778 *--------------------------------------------------------------------- 779 * ParseDoDependency -- 780 * Parse the dependency line in line. 781 * 782 * Results: 783 * None 784 * 785 * Side Effects: 786 * The nodes of the sources are linked as children to the nodes of the 787 * targets. Some nodes may be created. 788 * 789 * We parse a dependency line by first extracting words from the line and 790 * finding nodes in the list of all targets with that name. This is done 791 * until a character is encountered which is an operator character. Currently 792 * these are only ! and :. At this point the operator is parsed and the 793 * pointer into the line advanced until the first source is encountered. 794 * The parsed operator is applied to each node in the 'targets' list, 795 * which is where the nodes found for the targets are kept, by means of 796 * the ParseDoOp function. 797 * The sources are read in much the same way as the targets were except 798 * that now they are expanded using the wildcarding scheme of the C-Shell 799 * and all instances of the resulting words in the list of all targets 800 * are found. Each of the resulting nodes is then linked to each of the 801 * targets as one of its children. 802 * Certain targets are handled specially. These are the ones detailed 803 * by the specType variable. 804 * The storing of transformation rules is also taken care of here. 805 * A target is recognized as a transformation rule by calling 806 * Suff_IsTransform. If it is a transformation rule, its node is gotten 807 * from the suffix module via Suff_AddTransform rather than the standard 808 * Targ_FindNode in the target module. 809 *--------------------------------------------------------------------- 810 */ 811 static void 812 ParseDoDependency (line) 813 char *line; /* the line to parse */ 814 { 815 char *cp; /* our current position */ 816 GNode *gn; /* a general purpose temporary node */ 817 int op; /* the operator on the line */ 818 char savec; /* a place to save a character */ 819 Lst paths; /* List of search paths to alter when parsing 820 * a list of .PATH targets */ 821 int tOp; /* operator from special target */ 822 Lst sources; /* list of archive source names after 823 * expansion */ 824 Lst curTargs; /* list of target names to be found and added 825 * to the targets list */ 826 Lst curSrcs; /* list of sources in order */ 827 828 tOp = 0; 829 830 specType = Not; 831 waiting = 0; 832 paths = (Lst)NULL; 833 834 curTargs = Lst_Init(FALSE); 835 curSrcs = Lst_Init(FALSE); 836 837 do { 838 for (cp = line; 839 *cp && !isspace ((unsigned char)*cp) && 840 (*cp != '!') && (*cp != ':') && (*cp != '('); 841 cp++) 842 { 843 if (*cp == '$') { 844 /* 845 * Must be a dynamic source (would have been expanded 846 * otherwise), so call the Var module to parse the puppy 847 * so we can safely advance beyond it...There should be 848 * no errors in this, as they would have been discovered 849 * in the initial Var_Subst and we wouldn't be here. 850 */ 851 int length; 852 Boolean freeIt; 853 char *result; 854 855 result=Var_Parse(cp, VAR_CMD, TRUE, &length, &freeIt); 856 857 if (freeIt) { 858 free(result); 859 } 860 cp += length-1; 861 } 862 continue; 863 } 864 if (*cp == '(') { 865 /* 866 * Archives must be handled specially to make sure the OP_ARCHV 867 * flag is set in their 'type' field, for one thing, and because 868 * things like "archive(file1.o file2.o file3.o)" are permissible. 869 * Arch_ParseArchive will set 'line' to be the first non-blank 870 * after the archive-spec. It creates/finds nodes for the members 871 * and places them on the given list, returning SUCCESS if all 872 * went well and FAILURE if there was an error in the 873 * specification. On error, line should remain untouched. 874 */ 875 if (Arch_ParseArchive (&line, targets, VAR_CMD) != SUCCESS) { 876 Parse_Error (PARSE_FATAL, 877 "Error in archive specification: \"%s\"", line); 878 return; 879 } else { 880 continue; 881 } 882 } 883 savec = *cp; 884 885 if (!*cp) { 886 /* 887 * Ending a dependency line without an operator is a Bozo 888 * no-no 889 */ 890 Parse_Error (PARSE_FATAL, "Need an operator"); 891 return; 892 } 893 *cp = '\0'; 894 /* 895 * Have a word in line. See if it's a special target and set 896 * specType to match it. 897 */ 898 if (*line == '.' && isupper ((unsigned char)line[1])) { 899 /* 900 * See if the target is a special target that must have it 901 * or its sources handled specially. 902 */ 903 int keywd = ParseFindKeyword(line); 904 if (keywd != -1) { 905 if (specType == ExPath && parseKeywords[keywd].spec != ExPath) { 906 Parse_Error(PARSE_FATAL, "Mismatched special targets"); 907 return; 908 } 909 910 specType = parseKeywords[keywd].spec; 911 tOp = parseKeywords[keywd].op; 912 913 /* 914 * Certain special targets have special semantics: 915 * .PATH Have to set the dirSearchPath 916 * variable too 917 * .MAIN Its sources are only used if 918 * nothing has been specified to 919 * create. 920 * .DEFAULT Need to create a node to hang 921 * commands on, but we don't want 922 * it in the graph, nor do we want 923 * it to be the Main Target, so we 924 * create it, set OP_NOTMAIN and 925 * add it to the list, setting 926 * DEFAULT to the new node for 927 * later use. We claim the node is 928 * A transformation rule to make 929 * life easier later, when we'll 930 * use Make_HandleUse to actually 931 * apply the .DEFAULT commands. 932 * .PHONY The list of targets 933 * .NOPATH Don't search for file in the path 934 * .BEGIN 935 * .END 936 * .INTERRUPT Are not to be considered the 937 * main target. 938 * .NOTPARALLEL Make only one target at a time. 939 * .SINGLESHELL Create a shell for each command. 940 * .ORDER Must set initial predecessor to NIL 941 */ 942 switch (specType) { 943 case ExPath: 944 if (paths == NULL) { 945 paths = Lst_Init(FALSE); 946 } 947 (void)Lst_AtEnd(paths, (ClientData)dirSearchPath); 948 break; 949 case Main: 950 if (!Lst_IsEmpty(create)) { 951 specType = Not; 952 } 953 break; 954 case Begin: 955 case End: 956 case Interrupt: 957 gn = Targ_FindNode(line, TARG_CREATE); 958 gn->type |= OP_NOTMAIN; 959 (void)Lst_AtEnd(targets, (ClientData)gn); 960 break; 961 case Default: 962 gn = Targ_NewGN(".DEFAULT"); 963 gn->type |= (OP_NOTMAIN|OP_TRANSFORM); 964 (void)Lst_AtEnd(targets, (ClientData)gn); 965 DEFAULT = gn; 966 break; 967 case NotParallel: 968 { 969 maxJobs = 1; 970 break; 971 } 972 case SingleShell: 973 compatMake = TRUE; 974 break; 975 case Order: 976 predecessor = NILGNODE; 977 break; 978 default: 979 break; 980 } 981 } else if (strncmp (line, ".PATH", 5) == 0) { 982 /* 983 * .PATH<suffix> has to be handled specially. 984 * Call on the suffix module to give us a path to 985 * modify. 986 */ 987 Lst path; 988 989 specType = ExPath; 990 path = Suff_GetPath (&line[5]); 991 if (path == NILLST) { 992 Parse_Error (PARSE_FATAL, 993 "Suffix '%s' not defined (yet)", 994 &line[5]); 995 return; 996 } else { 997 if (paths == (Lst)NULL) { 998 paths = Lst_Init(FALSE); 999 } 1000 (void)Lst_AtEnd(paths, (ClientData)path); 1001 } 1002 } 1003 } 1004 1005 /* 1006 * Have word in line. Get or create its node and stick it at 1007 * the end of the targets list 1008 */ 1009 if ((specType == Not) && (*line != '\0')) { 1010 if (Dir_HasWildcards(line)) { 1011 /* 1012 * Targets are to be sought only in the current directory, 1013 * so create an empty path for the thing. Note we need to 1014 * use Dir_Destroy in the destruction of the path as the 1015 * Dir module could have added a directory to the path... 1016 */ 1017 Lst emptyPath = Lst_Init(FALSE); 1018 1019 Dir_Expand(line, emptyPath, curTargs); 1020 1021 Lst_Destroy(emptyPath, Dir_Destroy); 1022 } else { 1023 /* 1024 * No wildcards, but we want to avoid code duplication, 1025 * so create a list with the word on it. 1026 */ 1027 (void)Lst_AtEnd(curTargs, (ClientData)line); 1028 } 1029 1030 while(!Lst_IsEmpty(curTargs)) { 1031 char *targName = (char *)Lst_DeQueue(curTargs); 1032 1033 if (!Suff_IsTransform (targName)) { 1034 gn = Targ_FindNode (targName, TARG_CREATE); 1035 } else { 1036 gn = Suff_AddTransform (targName); 1037 } 1038 1039 (void)Lst_AtEnd (targets, (ClientData)gn); 1040 } 1041 } else if (specType == ExPath && *line != '.' && *line != '\0') { 1042 Parse_Error(PARSE_WARNING, "Extra target (%s) ignored", line); 1043 } 1044 1045 *cp = savec; 1046 /* 1047 * If it is a special type and not .PATH, it's the only target we 1048 * allow on this line... 1049 */ 1050 if (specType != Not && specType != ExPath) { 1051 Boolean warn = FALSE; 1052 1053 while ((*cp != '!') && (*cp != ':') && *cp) { 1054 if (*cp != ' ' && *cp != '\t') { 1055 warn = TRUE; 1056 } 1057 cp++; 1058 } 1059 if (warn) { 1060 Parse_Error(PARSE_WARNING, "Extra target ignored"); 1061 } 1062 } else { 1063 while (*cp && isspace ((unsigned char)*cp)) { 1064 cp++; 1065 } 1066 } 1067 line = cp; 1068 } while ((*line != '!') && (*line != ':') && *line); 1069 1070 /* 1071 * Don't need the list of target names anymore... 1072 */ 1073 Lst_Destroy(curTargs, NOFREE); 1074 1075 if (!Lst_IsEmpty(targets)) { 1076 switch(specType) { 1077 default: 1078 Parse_Error(PARSE_WARNING, "Special and mundane targets don't mix. Mundane ones ignored"); 1079 break; 1080 case Default: 1081 case Begin: 1082 case End: 1083 case Interrupt: 1084 /* 1085 * These four create nodes on which to hang commands, so 1086 * targets shouldn't be empty... 1087 */ 1088 case Not: 1089 /* 1090 * Nothing special here -- targets can be empty if it wants. 1091 */ 1092 break; 1093 } 1094 } 1095 1096 /* 1097 * Have now parsed all the target names. Must parse the operator next. The 1098 * result is left in op . 1099 */ 1100 if (*cp == '!') { 1101 op = OP_FORCE; 1102 } else if (*cp == ':') { 1103 if (cp[1] == ':') { 1104 op = OP_DOUBLEDEP; 1105 cp++; 1106 } else { 1107 op = OP_DEPENDS; 1108 } 1109 } else { 1110 Parse_Error (PARSE_FATAL, "Missing dependency operator"); 1111 return; 1112 } 1113 1114 cp++; /* Advance beyond operator */ 1115 1116 Lst_ForEach (targets, ParseDoOp, (ClientData)&op); 1117 1118 /* 1119 * Get to the first source 1120 */ 1121 while (*cp && isspace ((unsigned char)*cp)) { 1122 cp++; 1123 } 1124 line = cp; 1125 1126 /* 1127 * Several special targets take different actions if present with no 1128 * sources: 1129 * a .SUFFIXES line with no sources clears out all old suffixes 1130 * a .PRECIOUS line makes all targets precious 1131 * a .IGNORE line ignores errors for all targets 1132 * a .SILENT line creates silence when making all targets 1133 * a .PATH removes all directories from the search path(s). 1134 */ 1135 if (!*line) { 1136 switch (specType) { 1137 case Suffixes: 1138 Suff_ClearSuffixes (); 1139 break; 1140 case Precious: 1141 allPrecious = TRUE; 1142 break; 1143 case Ignore: 1144 ignoreErrors = TRUE; 1145 break; 1146 case Silent: 1147 beSilent = TRUE; 1148 break; 1149 case ExPath: 1150 Lst_ForEach(paths, ParseClearPath, (ClientData)NULL); 1151 break; 1152 #ifdef POSIX 1153 case Posix: 1154 Var_Set("%POSIX", "1003.2", VAR_GLOBAL); 1155 break; 1156 #endif 1157 default: 1158 break; 1159 } 1160 } else if (specType == MFlags) { 1161 /* 1162 * Call on functions in main.c to deal with these arguments and 1163 * set the initial character to a null-character so the loop to 1164 * get sources won't get anything 1165 */ 1166 Main_ParseArgLine (line); 1167 *line = '\0'; 1168 } else if (specType == ExShell) { 1169 if (Job_ParseShell (line) != SUCCESS) { 1170 Parse_Error (PARSE_FATAL, "improper shell specification"); 1171 return; 1172 } 1173 *line = '\0'; 1174 } else if ((specType == NotParallel) || (specType == SingleShell)) { 1175 *line = '\0'; 1176 } 1177 1178 /* 1179 * NOW GO FOR THE SOURCES 1180 */ 1181 if ((specType == Suffixes) || (specType == ExPath) || 1182 (specType == Includes) || (specType == Libs) || 1183 (specType == Null)) 1184 { 1185 while (*line) { 1186 /* 1187 * If the target was one that doesn't take files as its sources 1188 * but takes something like suffixes, we take each 1189 * space-separated word on the line as a something and deal 1190 * with it accordingly. 1191 * 1192 * If the target was .SUFFIXES, we take each source as a 1193 * suffix and add it to the list of suffixes maintained by the 1194 * Suff module. 1195 * 1196 * If the target was a .PATH, we add the source as a directory 1197 * to search on the search path. 1198 * 1199 * If it was .INCLUDES, the source is taken to be the suffix of 1200 * files which will be #included and whose search path should 1201 * be present in the .INCLUDES variable. 1202 * 1203 * If it was .LIBS, the source is taken to be the suffix of 1204 * files which are considered libraries and whose search path 1205 * should be present in the .LIBS variable. 1206 * 1207 * If it was .NULL, the source is the suffix to use when a file 1208 * has no valid suffix. 1209 */ 1210 char savec; 1211 while (*cp && !isspace ((unsigned char)*cp)) { 1212 cp++; 1213 } 1214 savec = *cp; 1215 *cp = '\0'; 1216 switch (specType) { 1217 case Suffixes: 1218 Suff_AddSuffix (line, &mainNode); 1219 break; 1220 case ExPath: 1221 Lst_ForEach(paths, ParseAddDir, (ClientData)line); 1222 break; 1223 case Includes: 1224 Suff_AddInclude (line); 1225 break; 1226 case Libs: 1227 Suff_AddLib (line); 1228 break; 1229 case Null: 1230 Suff_SetNull (line); 1231 break; 1232 default: 1233 break; 1234 } 1235 *cp = savec; 1236 if (savec != '\0') { 1237 cp++; 1238 } 1239 while (*cp && isspace ((unsigned char)*cp)) { 1240 cp++; 1241 } 1242 line = cp; 1243 } 1244 if (paths) { 1245 Lst_Destroy(paths, NOFREE); 1246 } 1247 } else { 1248 while (*line) { 1249 /* 1250 * The targets take real sources, so we must beware of archive 1251 * specifications (i.e. things with left parentheses in them) 1252 * and handle them accordingly. 1253 */ 1254 while (*cp && !isspace ((unsigned char)*cp)) { 1255 if ((*cp == '(') && (cp > line) && (cp[-1] != '$')) { 1256 /* 1257 * Only stop for a left parenthesis if it isn't at the 1258 * start of a word (that'll be for variable changes 1259 * later) and isn't preceded by a dollar sign (a dynamic 1260 * source). 1261 */ 1262 break; 1263 } else { 1264 cp++; 1265 } 1266 } 1267 1268 if (*cp == '(') { 1269 GNode *gn; 1270 1271 sources = Lst_Init (FALSE); 1272 if (Arch_ParseArchive (&line, sources, VAR_CMD) != SUCCESS) { 1273 Parse_Error (PARSE_FATAL, 1274 "Error in source archive spec \"%s\"", line); 1275 return; 1276 } 1277 1278 while (!Lst_IsEmpty (sources)) { 1279 gn = (GNode *) Lst_DeQueue (sources); 1280 ParseDoSrc (tOp, gn->name, curSrcs); 1281 } 1282 Lst_Destroy (sources, NOFREE); 1283 cp = line; 1284 } else { 1285 if (*cp) { 1286 *cp = '\0'; 1287 cp += 1; 1288 } 1289 1290 ParseDoSrc (tOp, line, curSrcs); 1291 } 1292 while (*cp && isspace ((unsigned char)*cp)) { 1293 cp++; 1294 } 1295 line = cp; 1296 } 1297 } 1298 1299 if (mainNode == NILGNODE) { 1300 /* 1301 * If we have yet to decide on a main target to make, in the 1302 * absence of any user input, we want the first target on 1303 * the first dependency line that is actually a real target 1304 * (i.e. isn't a .USE or .EXEC rule) to be made. 1305 */ 1306 Lst_ForEach (targets, ParseFindMain, (ClientData)0); 1307 } 1308 1309 /* 1310 * Finally, destroy the list of sources 1311 */ 1312 Lst_Destroy(curSrcs, NOFREE); 1313 } 1314 1315 /*- 1316 *--------------------------------------------------------------------- 1317 * Parse_IsVar -- 1318 * Return TRUE if the passed line is a variable assignment. A variable 1319 * assignment consists of a single word followed by optional whitespace 1320 * followed by either a += or an = operator. 1321 * This function is used both by the Parse_File function and main when 1322 * parsing the command-line arguments. 1323 * 1324 * Results: 1325 * TRUE if it is. FALSE if it ain't 1326 * 1327 * Side Effects: 1328 * none 1329 *--------------------------------------------------------------------- 1330 */ 1331 Boolean 1332 Parse_IsVar (line) 1333 register char *line; /* the line to check */ 1334 { 1335 register Boolean wasSpace = FALSE; /* set TRUE if found a space */ 1336 register Boolean haveName = FALSE; /* Set TRUE if have a variable name */ 1337 int level = 0; 1338 #define ISEQOPERATOR(c) \ 1339 (((c) == '+') || ((c) == ':') || ((c) == '?') || ((c) == '!')) 1340 1341 /* 1342 * Skip to variable name 1343 */ 1344 for (;(*line == ' ') || (*line == '\t'); line++) 1345 continue; 1346 1347 for (; *line != '=' || level != 0; line++) 1348 switch (*line) { 1349 case '\0': 1350 /* 1351 * end-of-line -- can't be a variable assignment. 1352 */ 1353 return FALSE; 1354 1355 case ' ': 1356 case '\t': 1357 /* 1358 * there can be as much white space as desired so long as there is 1359 * only one word before the operator 1360 */ 1361 wasSpace = TRUE; 1362 break; 1363 1364 case '(': 1365 case '{': 1366 level++; 1367 break; 1368 1369 case '}': 1370 case ')': 1371 level--; 1372 break; 1373 1374 default: 1375 if (wasSpace && haveName) { 1376 if (ISEQOPERATOR(*line)) { 1377 /* 1378 * We must have a finished word 1379 */ 1380 if (level != 0) 1381 return FALSE; 1382 1383 /* 1384 * When an = operator [+?!:] is found, the next 1385 * character must be an = or it ain't a valid 1386 * assignment. 1387 */ 1388 if (line[1] == '=') 1389 return haveName; 1390 #ifdef SUNSHCMD 1391 /* 1392 * This is a shell command 1393 */ 1394 if (strncmp(line, ":sh", 3) == 0) 1395 return haveName; 1396 #endif 1397 } 1398 /* 1399 * This is the start of another word, so not assignment. 1400 */ 1401 return FALSE; 1402 } 1403 else { 1404 haveName = TRUE; 1405 wasSpace = FALSE; 1406 } 1407 break; 1408 } 1409 1410 return haveName; 1411 } 1412 1413 /*- 1414 *--------------------------------------------------------------------- 1415 * Parse_DoVar -- 1416 * Take the variable assignment in the passed line and do it in the 1417 * global context. 1418 * 1419 * Note: There is a lexical ambiguity with assignment modifier characters 1420 * in variable names. This routine interprets the character before the = 1421 * as a modifier. Therefore, an assignment like 1422 * C++=/usr/bin/CC 1423 * is interpreted as "C+ +=" instead of "C++ =". 1424 * 1425 * Results: 1426 * none 1427 * 1428 * Side Effects: 1429 * the variable structure of the given variable name is altered in the 1430 * global context. 1431 *--------------------------------------------------------------------- 1432 */ 1433 void 1434 Parse_DoVar (line, ctxt) 1435 char *line; /* a line guaranteed to be a variable 1436 * assignment. This reduces error checks */ 1437 GNode *ctxt; /* Context in which to do the assignment */ 1438 { 1439 char *cp; /* pointer into line */ 1440 enum { 1441 VAR_SUBST, VAR_APPEND, VAR_SHELL, VAR_NORMAL 1442 } type; /* Type of assignment */ 1443 char *opc; /* ptr to operator character to 1444 * null-terminate the variable name */ 1445 /* 1446 * Avoid clobbered variable warnings by forcing the compiler 1447 * to ``unregister'' variables 1448 */ 1449 #if __GNUC__ 1450 (void) &cp; 1451 (void) &line; 1452 #endif 1453 1454 /* 1455 * Skip to variable name 1456 */ 1457 while ((*line == ' ') || (*line == '\t')) { 1458 line++; 1459 } 1460 1461 /* 1462 * Skip to operator character, nulling out whitespace as we go 1463 */ 1464 for (cp = line + 1; *cp != '='; cp++) { 1465 if (isspace ((unsigned char)*cp)) { 1466 *cp = '\0'; 1467 } 1468 } 1469 opc = cp-1; /* operator is the previous character */ 1470 *cp++ = '\0'; /* nuke the = */ 1471 1472 /* 1473 * Check operator type 1474 */ 1475 switch (*opc) { 1476 case '+': 1477 type = VAR_APPEND; 1478 *opc = '\0'; 1479 break; 1480 1481 case '?': 1482 /* 1483 * If the variable already has a value, we don't do anything. 1484 */ 1485 *opc = '\0'; 1486 if (Var_Exists(line, ctxt)) { 1487 return; 1488 } else { 1489 type = VAR_NORMAL; 1490 } 1491 break; 1492 1493 case ':': 1494 type = VAR_SUBST; 1495 *opc = '\0'; 1496 break; 1497 1498 case '!': 1499 type = VAR_SHELL; 1500 *opc = '\0'; 1501 break; 1502 1503 default: 1504 #ifdef SUNSHCMD 1505 while (opc > line && *opc != ':') 1506 opc--; 1507 1508 if (strncmp(opc, ":sh", 3) == 0) { 1509 type = VAR_SHELL; 1510 *opc = '\0'; 1511 break; 1512 } 1513 #endif 1514 type = VAR_NORMAL; 1515 break; 1516 } 1517 1518 while (isspace ((unsigned char)*cp)) { 1519 cp++; 1520 } 1521 1522 if (type == VAR_APPEND) { 1523 Var_Append (line, cp, ctxt); 1524 } else if (type == VAR_SUBST) { 1525 /* 1526 * Allow variables in the old value to be undefined, but leave their 1527 * invocation alone -- this is done by forcing oldVars to be false. 1528 * XXX: This can cause recursive variables, but that's not hard to do, 1529 * and this allows someone to do something like 1530 * 1531 * CFLAGS = $(.INCLUDES) 1532 * CFLAGS := -I.. $(CFLAGS) 1533 * 1534 * And not get an error. 1535 */ 1536 Boolean oldOldVars = oldVars; 1537 1538 oldVars = FALSE; 1539 1540 /* 1541 * make sure that we set the variable the first time to nothing 1542 * so that it gets substituted! 1543 */ 1544 if (!Var_Exists(line, ctxt)) 1545 Var_Set(line, "", ctxt); 1546 1547 cp = Var_Subst(NULL, cp, ctxt, FALSE); 1548 oldVars = oldOldVars; 1549 1550 Var_Set(line, cp, ctxt); 1551 free(cp); 1552 } else if (type == VAR_SHELL) { 1553 Boolean freeCmd = FALSE; /* TRUE if the command needs to be freed, i.e. 1554 * if any variable expansion was performed */ 1555 char *res, *err; 1556 1557 if (strchr(cp, '$') != NULL) { 1558 /* 1559 * There's a dollar sign in the command, so perform variable 1560 * expansion on the whole thing. The resulting string will need 1561 * freeing when we're done, so set freeCmd to TRUE. 1562 */ 1563 cp = Var_Subst(NULL, cp, VAR_CMD, TRUE); 1564 freeCmd = TRUE; 1565 } 1566 1567 res = Cmd_Exec(cp, &err); 1568 Var_Set(line, res, ctxt); 1569 free(res); 1570 1571 if (err) 1572 Parse_Error(PARSE_WARNING, err, cp); 1573 1574 if (freeCmd) 1575 free(cp); 1576 } else { 1577 /* 1578 * Normal assignment -- just do it. 1579 */ 1580 Var_Set(line, cp, ctxt); 1581 } 1582 } 1583 1584 1585 /*- 1586 * ParseAddCmd -- 1587 * Lst_ForEach function to add a command line to all targets 1588 * 1589 * Results: 1590 * Always 0 1591 * 1592 * Side Effects: 1593 * A new element is added to the commands list of the node. 1594 */ 1595 static int 1596 ParseAddCmd(gnp, cmd) 1597 ClientData gnp; /* the node to which the command is to be added */ 1598 ClientData cmd; /* the command to add */ 1599 { 1600 GNode *gn = (GNode *) gnp; 1601 /* if target already supplied, ignore commands */ 1602 if ((gn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (gn->cohorts)) 1603 gn = (GNode *) Lst_Datum (Lst_Last (gn->cohorts)); 1604 if (!(gn->type & OP_HAS_COMMANDS)) { 1605 (void)Lst_AtEnd(gn->commands, cmd); 1606 ParseMark(gn); 1607 } else { 1608 #ifdef notyet 1609 /* XXX: We cannot do this until we fix the tree */ 1610 (void)Lst_AtEnd(gn->commands, cmd); 1611 Parse_Error (PARSE_WARNING, 1612 "overriding commands for target \"%s\"; " 1613 "previous commands defined at %s: %d ignored", 1614 gn->name, gn->fname, gn->lineno); 1615 #else 1616 Parse_Error (PARSE_WARNING, 1617 "duplicate script for target \"%s\" ignored", 1618 gn->name); 1619 ParseErrorInternal (gn->fname, gn->lineno, PARSE_WARNING, 1620 "using previous script for \"%s\" defined here", 1621 gn->name); 1622 #endif 1623 } 1624 return(0); 1625 } 1626 1627 /*- 1628 *----------------------------------------------------------------------- 1629 * ParseHasCommands -- 1630 * Callback procedure for Parse_File when destroying the list of 1631 * targets on the last dependency line. Marks a target as already 1632 * having commands if it does, to keep from having shell commands 1633 * on multiple dependency lines. 1634 * 1635 * Results: 1636 * None 1637 * 1638 * Side Effects: 1639 * OP_HAS_COMMANDS may be set for the target. 1640 * 1641 *----------------------------------------------------------------------- 1642 */ 1643 static void 1644 ParseHasCommands(gnp) 1645 ClientData gnp; /* Node to examine */ 1646 { 1647 GNode *gn = (GNode *) gnp; 1648 if (!Lst_IsEmpty(gn->commands)) { 1649 gn->type |= OP_HAS_COMMANDS; 1650 } 1651 } 1652 1653 /*- 1654 *----------------------------------------------------------------------- 1655 * Parse_AddIncludeDir -- 1656 * Add a directory to the path searched for included makefiles 1657 * bracketed by double-quotes. Used by functions in main.c 1658 * 1659 * Results: 1660 * None. 1661 * 1662 * Side Effects: 1663 * The directory is appended to the list. 1664 * 1665 *----------------------------------------------------------------------- 1666 */ 1667 void 1668 Parse_AddIncludeDir (dir) 1669 char *dir; /* The name of the directory to add */ 1670 { 1671 (void) Dir_AddDir (parseIncPath, dir); 1672 } 1673 1674 /*- 1675 *--------------------------------------------------------------------- 1676 * ParseDoInclude -- 1677 * Push to another file. 1678 * 1679 * The input is the line minus the `.'. A file spec is a string 1680 * enclosed in <> or "". The former is looked for only in sysIncPath. 1681 * The latter in . and the directories specified by -I command line 1682 * options 1683 * 1684 * Results: 1685 * None 1686 * 1687 * Side Effects: 1688 * A structure is added to the includes Lst and readProc, lineno, 1689 * fname and curFILE are altered for the new file 1690 *--------------------------------------------------------------------- 1691 */ 1692 static void 1693 ParseDoInclude (line) 1694 char *line; 1695 { 1696 char *fullname; /* full pathname of file */ 1697 IFile *oldFile; /* state associated with current file */ 1698 char endc; /* the character which ends the file spec */ 1699 char *cp; /* current position in file spec */ 1700 Boolean isSystem; /* TRUE if makefile is a system makefile */ 1701 int silent = (*line != 'i') ? 1 : 0; 1702 char *file = &line[7 + silent]; 1703 1704 /* 1705 * Skip to delimiter character so we know where to look 1706 */ 1707 while ((*file == ' ') || (*file == '\t')) { 1708 file++; 1709 } 1710 1711 if ((*file != '"') && (*file != '<')) { 1712 Parse_Error (PARSE_FATAL, 1713 ".include filename must be delimited by '\"' or '<'"); 1714 return; 1715 } 1716 1717 /* 1718 * Set the search path on which to find the include file based on the 1719 * characters which bracket its name. Angle-brackets imply it's 1720 * a system Makefile while double-quotes imply it's a user makefile 1721 */ 1722 if (*file == '<') { 1723 isSystem = TRUE; 1724 endc = '>'; 1725 } else { 1726 isSystem = FALSE; 1727 endc = '"'; 1728 } 1729 1730 /* 1731 * Skip to matching delimiter 1732 */ 1733 for (cp = ++file; *cp && *cp != endc; cp++) { 1734 continue; 1735 } 1736 1737 if (*cp != endc) { 1738 Parse_Error (PARSE_FATAL, 1739 "Unclosed %cinclude filename. '%c' expected", 1740 '.', endc); 1741 return; 1742 } 1743 *cp = '\0'; 1744 1745 /* 1746 * Substitute for any variables in the file name before trying to 1747 * find the thing. 1748 */ 1749 file = Var_Subst (NULL, file, VAR_CMD, FALSE); 1750 1751 /* 1752 * Now we know the file's name and its search path, we attempt to 1753 * find the durn thing. A return of NULL indicates the file don't 1754 * exist. 1755 */ 1756 if (!isSystem) { 1757 /* 1758 * Include files contained in double-quotes are first searched for 1759 * relative to the including file's location. We don't want to 1760 * cd there, of course, so we just tack on the old file's 1761 * leading path components and call Dir_FindFile to see if 1762 * we can locate the beast. 1763 */ 1764 char *prefEnd, *Fname; 1765 1766 /* Make a temporary copy of this, to be safe. */ 1767 Fname = estrdup(fname); 1768 1769 prefEnd = strrchr (Fname, '/'); 1770 if (prefEnd != (char *)NULL) { 1771 char *newName; 1772 1773 *prefEnd = '\0'; 1774 if (file[0] == '/') 1775 newName = estrdup(file); 1776 else 1777 newName = str_concat (Fname, file, STR_ADDSLASH); 1778 fullname = Dir_FindFile (newName, parseIncPath); 1779 if (fullname == (char *)NULL) { 1780 fullname = Dir_FindFile(newName, dirSearchPath); 1781 } 1782 free (newName); 1783 *prefEnd = '/'; 1784 } else { 1785 fullname = (char *)NULL; 1786 } 1787 free (Fname); 1788 } else { 1789 fullname = (char *)NULL; 1790 } 1791 1792 if (fullname == (char *)NULL) { 1793 /* 1794 * System makefile or makefile wasn't found in same directory as 1795 * included makefile. Search for it first on the -I search path, 1796 * then on the .PATH search path, if not found in a -I directory. 1797 * XXX: Suffix specific? 1798 */ 1799 fullname = Dir_FindFile (file, parseIncPath); 1800 if (fullname == (char *)NULL) { 1801 fullname = Dir_FindFile(file, dirSearchPath); 1802 } 1803 } 1804 1805 if (fullname == (char *)NULL) { 1806 /* 1807 * Still haven't found the makefile. Look for it on the system 1808 * path as a last resort. 1809 */ 1810 fullname = Dir_FindFile(file, sysIncPath); 1811 } 1812 1813 if (fullname == (char *) NULL) { 1814 *cp = endc; 1815 if (!silent) 1816 Parse_Error (PARSE_FATAL, "Could not find %s", file); 1817 return; 1818 } 1819 1820 free(file); 1821 1822 /* 1823 * Once we find the absolute path to the file, we get to save all the 1824 * state from the current file before we can start reading this 1825 * include file. The state is stored in an IFile structure which 1826 * is placed on a list with other IFile structures. The list makes 1827 * a very nice stack to track how we got here... 1828 */ 1829 oldFile = (IFile *) emalloc (sizeof (IFile)); 1830 oldFile->fname = fname; 1831 1832 oldFile->F = curFILE; 1833 oldFile->p = curPTR; 1834 oldFile->lineno = lineno; 1835 1836 (void) Lst_AtFront (includes, (ClientData)oldFile); 1837 1838 /* 1839 * Once the previous state has been saved, we can get down to reading 1840 * the new file. We set up the name of the file to be the absolute 1841 * name of the include file so error messages refer to the right 1842 * place. Naturally enough, we start reading at line number 0. 1843 */ 1844 fname = fullname; 1845 lineno = 0; 1846 1847 ParseSetParseFile(fname); 1848 1849 curFILE = fopen (fullname, "r"); 1850 curPTR = NULL; 1851 if (curFILE == (FILE * ) NULL) { 1852 if (!silent) 1853 Parse_Error (PARSE_FATAL, "Cannot open %s", fullname); 1854 /* 1855 * Pop to previous file 1856 */ 1857 (void) ParseEOF(0); 1858 } 1859 } 1860 1861 1862 /*- 1863 *--------------------------------------------------------------------- 1864 * ParseSetParseFile -- 1865 * Set the .PARSEDIR and .PARSEFILE variables to the dirname and 1866 * basename of the given filename 1867 * 1868 * Results: 1869 * None 1870 * 1871 * Side Effects: 1872 * The .PARSEDIR and .PARSEFILE variables are overwritten by the 1873 * dirname and basename of the given filename. 1874 *--------------------------------------------------------------------- 1875 */ 1876 static void 1877 ParseSetParseFile(fname) 1878 char *fname; 1879 { 1880 char *slash; 1881 1882 slash = strrchr(fname, '/'); 1883 if (slash == 0) { 1884 Var_Set(".PARSEDIR", ".", VAR_GLOBAL); 1885 Var_Set(".PARSEFILE", fname, VAR_GLOBAL); 1886 } else { 1887 *slash = '\0'; 1888 Var_Set(".PARSEDIR", fname, VAR_GLOBAL); 1889 Var_Set(".PARSEFILE", slash+1, VAR_GLOBAL); 1890 *slash = '/'; 1891 } 1892 } 1893 1894 1895 /*- 1896 *--------------------------------------------------------------------- 1897 * Parse_FromString -- 1898 * Start Parsing from the given string 1899 * 1900 * Results: 1901 * None 1902 * 1903 * Side Effects: 1904 * A structure is added to the includes Lst and readProc, lineno, 1905 * fname and curFILE are altered for the new file 1906 *--------------------------------------------------------------------- 1907 */ 1908 void 1909 Parse_FromString(str) 1910 char *str; 1911 { 1912 IFile *oldFile; /* state associated with this file */ 1913 1914 if (DEBUG(FOR)) 1915 (void) fprintf(stderr, "%s\n----\n", str); 1916 1917 oldFile = (IFile *) emalloc (sizeof (IFile)); 1918 oldFile->lineno = lineno; 1919 oldFile->fname = fname; 1920 oldFile->F = curFILE; 1921 oldFile->p = curPTR; 1922 1923 (void) Lst_AtFront (includes, (ClientData)oldFile); 1924 1925 curFILE = NULL; 1926 curPTR = (PTR *) emalloc (sizeof (PTR)); 1927 curPTR->str = curPTR->ptr = str; 1928 lineno = 0; 1929 fname = estrdup(fname); 1930 } 1931 1932 1933 #ifdef SYSVINCLUDE 1934 /*- 1935 *--------------------------------------------------------------------- 1936 * ParseTraditionalInclude -- 1937 * Push to another file. 1938 * 1939 * The input is the current line. The file name(s) are 1940 * following the "include". 1941 * 1942 * Results: 1943 * None 1944 * 1945 * Side Effects: 1946 * A structure is added to the includes Lst and readProc, lineno, 1947 * fname and curFILE are altered for the new file 1948 *--------------------------------------------------------------------- 1949 */ 1950 static void 1951 ParseTraditionalInclude (line) 1952 char *line; 1953 { 1954 char *fullname; /* full pathname of file */ 1955 IFile *oldFile; /* state associated with current file */ 1956 char *cp; /* current position in file spec */ 1957 char *prefEnd; 1958 int done = 0; 1959 int silent = (line[0] != 'i') ? 1 : 0; 1960 char *file = &line[silent + 7]; 1961 char *cfname = fname; 1962 size_t clineno = lineno; 1963 1964 1965 /* 1966 * Skip over whitespace 1967 */ 1968 while (isspace((unsigned char)*file)) 1969 file++; 1970 1971 if (*file == '\0') { 1972 Parse_Error (PARSE_FATAL, 1973 "Filename missing from \"include\""); 1974 return; 1975 } 1976 1977 for (; !done; file = cp + 1) { 1978 /* 1979 * Skip to end of line or next whitespace 1980 */ 1981 for (cp = file; *cp && !isspace((unsigned char) *cp); cp++) 1982 continue; 1983 1984 if (*cp) 1985 *cp = '\0'; 1986 else 1987 done = 1; 1988 1989 /* 1990 * Substitute for any variables in the file name before trying to 1991 * find the thing. 1992 */ 1993 file = Var_Subst(NULL, file, VAR_CMD, FALSE); 1994 1995 /* 1996 * Now we know the file's name, we attempt to find the durn thing. 1997 * A return of NULL indicates the file don't exist. 1998 * 1999 * Include files are first searched for relative to the including 2000 * file's location. We don't want to cd there, of course, so we 2001 * just tack on the old file's leading path components and call 2002 * Dir_FindFile to see if we can locate the beast. 2003 * XXX - this *does* search in the current directory, right? 2004 */ 2005 2006 prefEnd = strrchr(cfname, '/'); 2007 if (prefEnd != NULL) { 2008 char *newName; 2009 2010 *prefEnd = '\0'; 2011 newName = str_concat(cfname, file, STR_ADDSLASH); 2012 fullname = Dir_FindFile(newName, parseIncPath); 2013 if (fullname == NULL) { 2014 fullname = Dir_FindFile(newName, dirSearchPath); 2015 } 2016 free (newName); 2017 *prefEnd = '/'; 2018 } else { 2019 fullname = NULL; 2020 } 2021 2022 if (fullname == NULL) { 2023 /* 2024 * System makefile or makefile wasn't found in same directory as 2025 * included makefile. Search for it first on the -I search path, 2026 * then on the .PATH search path, if not found in a 2027 * -I directory. XXX: Suffix specific? 2028 */ 2029 fullname = Dir_FindFile(file, parseIncPath); 2030 if (fullname == NULL) { 2031 fullname = Dir_FindFile(file, dirSearchPath); 2032 } 2033 } 2034 2035 if (fullname == NULL) { 2036 /* 2037 * Still haven't found the makefile. Look for it on the system 2038 * path as a last resort. 2039 */ 2040 fullname = Dir_FindFile(file, sysIncPath); 2041 } 2042 2043 if (fullname == NULL) { 2044 if (!silent) 2045 ParseErrorInternal(cfname, clineno, PARSE_FATAL, 2046 "Could not find %s", file); 2047 free(file); 2048 continue; 2049 } 2050 2051 free(file); 2052 2053 /* 2054 * Once we find the absolute path to the file, we get to save all 2055 * the state from the current file before we can start reading this 2056 * include file. The state is stored in an IFile structure which 2057 * is placed on a list with other IFile structures. The list makes 2058 * a very nice stack to track how we got here... 2059 */ 2060 oldFile = (IFile *) emalloc(sizeof(IFile)); 2061 oldFile->fname = fname; 2062 2063 oldFile->F = curFILE; 2064 oldFile->p = curPTR; 2065 oldFile->lineno = lineno; 2066 2067 (void) Lst_AtFront(includes, (ClientData)oldFile); 2068 2069 /* 2070 * Once the previous state has been saved, we can get down to 2071 * reading the new file. We set up the name of the file to be the 2072 * absolute name of the include file so error messages refer to the 2073 * right place. Naturally enough, we start reading at line number 0. 2074 */ 2075 fname = fullname; 2076 lineno = 0; 2077 2078 curFILE = fopen(fullname, "r"); 2079 curPTR = NULL; 2080 if (curFILE == NULL) { 2081 if (!silent) 2082 ParseErrorInternal(cfname, clineno, PARSE_FATAL, 2083 "Cannot open %s", fullname); 2084 /* 2085 * Pop to previous file 2086 */ 2087 (void) ParseEOF(1); 2088 } 2089 } 2090 } 2091 #endif 2092 2093 /*- 2094 *--------------------------------------------------------------------- 2095 * ParseEOF -- 2096 * Called when EOF is reached in the current file. If we were reading 2097 * an include file, the includes stack is popped and things set up 2098 * to go back to reading the previous file at the previous location. 2099 * 2100 * Results: 2101 * CONTINUE if there's more to do. DONE if not. 2102 * 2103 * Side Effects: 2104 * The old curFILE, is closed. The includes list is shortened. 2105 * lineno, curFILE, and fname are changed if CONTINUE is returned. 2106 *--------------------------------------------------------------------- 2107 */ 2108 static int 2109 ParseEOF (opened) 2110 int opened; 2111 { 2112 IFile *ifile; /* the state on the top of the includes stack */ 2113 2114 if (Lst_IsEmpty (includes)) { 2115 Var_Delete(".PARSEDIR", VAR_GLOBAL); 2116 Var_Delete(".PARSEFILE", VAR_GLOBAL); 2117 return (DONE); 2118 } 2119 2120 ifile = (IFile *) Lst_DeQueue (includes); 2121 free ((Address) fname); 2122 fname = ifile->fname; 2123 lineno = ifile->lineno; 2124 if (opened && curFILE) 2125 (void) fclose (curFILE); 2126 if (curPTR) { 2127 free((Address) curPTR->str); 2128 free((Address) curPTR); 2129 } 2130 curFILE = ifile->F; 2131 curPTR = ifile->p; 2132 free ((Address)ifile); 2133 2134 /* pop the PARSEDIR/PARSEFILE variables */ 2135 ParseSetParseFile(fname); 2136 return (CONTINUE); 2137 } 2138 2139 /*- 2140 *--------------------------------------------------------------------- 2141 * ParseReadc -- 2142 * Read a character from the current file 2143 * 2144 * Results: 2145 * The character that was read 2146 * 2147 * Side Effects: 2148 *--------------------------------------------------------------------- 2149 */ 2150 static __inline int 2151 ParseReadc() 2152 { 2153 if (curFILE) 2154 return fgetc(curFILE); 2155 2156 if (curPTR && *curPTR->ptr) 2157 return *curPTR->ptr++; 2158 return EOF; 2159 } 2160 2161 2162 /*- 2163 *--------------------------------------------------------------------- 2164 * ParseUnreadc -- 2165 * Put back a character to the current file 2166 * 2167 * Results: 2168 * None. 2169 * 2170 * Side Effects: 2171 *--------------------------------------------------------------------- 2172 */ 2173 static void 2174 ParseUnreadc(c) 2175 int c; 2176 { 2177 if (curFILE) { 2178 ungetc(c, curFILE); 2179 return; 2180 } 2181 if (curPTR) { 2182 *--(curPTR->ptr) = c; 2183 return; 2184 } 2185 } 2186 2187 2188 /* ParseSkipLine(): 2189 * Grab the next line 2190 */ 2191 static char * 2192 ParseSkipLine(skip) 2193 int skip; /* Skip lines that don't start with . */ 2194 { 2195 char *line; 2196 int c, lastc, lineLength = 0; 2197 Buffer buf; 2198 2199 buf = Buf_Init(MAKE_BSIZE); 2200 2201 do { 2202 Buf_Discard(buf, lineLength); 2203 lastc = '\0'; 2204 2205 while (((c = ParseReadc()) != '\n' || lastc == '\\') 2206 && c != EOF) { 2207 if (c == '\n') { 2208 Buf_ReplaceLastByte(buf, (Byte)' '); 2209 lineno++; 2210 2211 while ((c = ParseReadc()) == ' ' || c == '\t'); 2212 2213 if (c == EOF) 2214 break; 2215 } 2216 2217 Buf_AddByte(buf, (Byte)c); 2218 lastc = c; 2219 } 2220 2221 if (c == EOF) { 2222 Parse_Error(PARSE_FATAL, "Unclosed conditional/for loop"); 2223 Buf_Destroy(buf, TRUE); 2224 return((char *)NULL); 2225 } 2226 2227 lineno++; 2228 Buf_AddByte(buf, (Byte)'\0'); 2229 line = (char *)Buf_GetAll(buf, &lineLength); 2230 } while (skip == 1 && line[0] != '.'); 2231 2232 Buf_Destroy(buf, FALSE); 2233 return line; 2234 } 2235 2236 2237 /*- 2238 *--------------------------------------------------------------------- 2239 * ParseReadLine -- 2240 * Read an entire line from the input file. Called only by Parse_File. 2241 * To facilitate escaped newlines and what have you, a character is 2242 * buffered in 'lastc', which is '\0' when no characters have been 2243 * read. When we break out of the loop, c holds the terminating 2244 * character and lastc holds a character that should be added to 2245 * the line (unless we don't read anything but a terminator). 2246 * 2247 * Results: 2248 * A line w/o its newline 2249 * 2250 * Side Effects: 2251 * Only those associated with reading a character 2252 *--------------------------------------------------------------------- 2253 */ 2254 static char * 2255 ParseReadLine () 2256 { 2257 Buffer buf; /* Buffer for current line */ 2258 register int c; /* the current character */ 2259 register int lastc; /* The most-recent character */ 2260 Boolean semiNL; /* treat semi-colons as newlines */ 2261 Boolean ignDepOp; /* TRUE if should ignore dependency operators 2262 * for the purposes of setting semiNL */ 2263 Boolean ignComment; /* TRUE if should ignore comments (in a 2264 * shell command */ 2265 char *line; /* Result */ 2266 char *ep; /* to strip trailing blanks */ 2267 int lineLength; /* Length of result */ 2268 2269 semiNL = FALSE; 2270 ignDepOp = FALSE; 2271 ignComment = FALSE; 2272 2273 /* 2274 * Handle special-characters at the beginning of the line. Either a 2275 * leading tab (shell command) or pound-sign (possible conditional) 2276 * forces us to ignore comments and dependency operators and treat 2277 * semi-colons as semi-colons (by leaving semiNL FALSE). This also 2278 * discards completely blank lines. 2279 */ 2280 for (;;) { 2281 c = ParseReadc(); 2282 2283 if (c == '\t') { 2284 ignComment = ignDepOp = TRUE; 2285 break; 2286 } else if (c == '\n') { 2287 lineno++; 2288 } else if (c == '#') { 2289 ParseUnreadc(c); 2290 break; 2291 } else { 2292 /* 2293 * Anything else breaks out without doing anything 2294 */ 2295 break; 2296 } 2297 } 2298 2299 if (c != EOF) { 2300 lastc = c; 2301 buf = Buf_Init(MAKE_BSIZE); 2302 2303 while (((c = ParseReadc ()) != '\n' || (lastc == '\\')) && 2304 (c != EOF)) 2305 { 2306 test_char: 2307 switch(c) { 2308 case '\n': 2309 /* 2310 * Escaped newline: read characters until a non-space or an 2311 * unescaped newline and replace them all by a single space. 2312 * This is done by storing the space over the backslash and 2313 * dropping through with the next nonspace. If it is a 2314 * semi-colon and semiNL is TRUE, it will be recognized as a 2315 * newline in the code below this... 2316 */ 2317 lineno++; 2318 lastc = ' '; 2319 while ((c = ParseReadc ()) == ' ' || c == '\t') { 2320 continue; 2321 } 2322 if (c == EOF || c == '\n') { 2323 goto line_read; 2324 } else { 2325 /* 2326 * Check for comments, semiNL's, etc. -- easier than 2327 * ParseUnreadc(c); continue; 2328 */ 2329 goto test_char; 2330 } 2331 /*NOTREACHED*/ 2332 break; 2333 2334 case ';': 2335 /* 2336 * Semi-colon: Need to see if it should be interpreted as a 2337 * newline 2338 */ 2339 if (semiNL) { 2340 /* 2341 * To make sure the command that may be following this 2342 * semi-colon begins with a tab, we push one back into the 2343 * input stream. This will overwrite the semi-colon in the 2344 * buffer. If there is no command following, this does no 2345 * harm, since the newline remains in the buffer and the 2346 * whole line is ignored. 2347 */ 2348 ParseUnreadc('\t'); 2349 goto line_read; 2350 } 2351 break; 2352 case '=': 2353 if (!semiNL) { 2354 /* 2355 * Haven't seen a dependency operator before this, so this 2356 * must be a variable assignment -- don't pay attention to 2357 * dependency operators after this. 2358 */ 2359 ignDepOp = TRUE; 2360 } else if (lastc == ':' || lastc == '!') { 2361 /* 2362 * Well, we've seen a dependency operator already, but it 2363 * was the previous character, so this is really just an 2364 * expanded variable assignment. Revert semi-colons to 2365 * being just semi-colons again and ignore any more 2366 * dependency operators. 2367 * 2368 * XXX: Note that a line like "foo : a:=b" will blow up, 2369 * but who'd write a line like that anyway? 2370 */ 2371 ignDepOp = TRUE; semiNL = FALSE; 2372 } 2373 break; 2374 case '#': 2375 if (!ignComment) { 2376 if ( 2377 #if 0 2378 compatMake && 2379 #endif 2380 (lastc != '\\')) { 2381 /* 2382 * If the character is a hash mark and it isn't escaped 2383 * (or we're being compatible), the thing is a comment. 2384 * Skip to the end of the line. 2385 */ 2386 do { 2387 c = ParseReadc(); 2388 } while ((c != '\n') && (c != EOF)); 2389 goto line_read; 2390 } else { 2391 /* 2392 * Don't add the backslash. Just let the # get copied 2393 * over. 2394 */ 2395 lastc = c; 2396 continue; 2397 } 2398 } 2399 break; 2400 case ':': 2401 case '!': 2402 if (!ignDepOp && (c == ':' || c == '!')) { 2403 /* 2404 * A semi-colon is recognized as a newline only on 2405 * dependency lines. Dependency lines are lines with a 2406 * colon or an exclamation point. Ergo... 2407 */ 2408 semiNL = TRUE; 2409 } 2410 break; 2411 } 2412 /* 2413 * Copy in the previous character and save this one in lastc. 2414 */ 2415 Buf_AddByte (buf, (Byte)lastc); 2416 lastc = c; 2417 2418 } 2419 line_read: 2420 lineno++; 2421 2422 if (lastc != '\0') { 2423 Buf_AddByte (buf, (Byte)lastc); 2424 } 2425 Buf_AddByte (buf, (Byte)'\0'); 2426 line = (char *)Buf_GetAll (buf, &lineLength); 2427 Buf_Destroy (buf, FALSE); 2428 2429 /* 2430 * Strip trailing blanks and tabs from the line. 2431 * Do not strip a blank or tab that is preceeded by 2432 * a '\' 2433 */ 2434 ep = line; 2435 while (*ep) 2436 ++ep; 2437 while (ep > line + 1 && (ep[-1] == ' ' || ep[-1] == '\t')) { 2438 if (ep > line + 1 && ep[-2] == '\\') 2439 break; 2440 --ep; 2441 } 2442 *ep = 0; 2443 2444 if (line[0] == '.') { 2445 /* 2446 * The line might be a conditional. Ask the conditional module 2447 * about it and act accordingly 2448 */ 2449 switch (Cond_Eval (line)) { 2450 case COND_SKIP: 2451 /* 2452 * Skip to next conditional that evaluates to COND_PARSE. 2453 */ 2454 do { 2455 free (line); 2456 line = ParseSkipLine(1); 2457 } while (line && Cond_Eval(line) != COND_PARSE); 2458 if (line == NULL) 2459 break; 2460 /*FALLTHRU*/ 2461 case COND_PARSE: 2462 free ((Address) line); 2463 line = ParseReadLine(); 2464 break; 2465 case COND_INVALID: 2466 if (For_Eval(line)) { 2467 int ok; 2468 free(line); 2469 do { 2470 /* 2471 * Skip after the matching end 2472 */ 2473 line = ParseSkipLine(0); 2474 if (line == NULL) { 2475 Parse_Error (PARSE_FATAL, 2476 "Unexpected end of file in for loop.\n"); 2477 break; 2478 } 2479 ok = For_Eval(line); 2480 free(line); 2481 } 2482 while (ok); 2483 if (line != NULL) 2484 For_Run(); 2485 line = ParseReadLine(); 2486 } 2487 break; 2488 } 2489 } 2490 return (line); 2491 2492 } else { 2493 /* 2494 * Hit end-of-file, so return a NULL line to indicate this. 2495 */ 2496 return((char *)NULL); 2497 } 2498 } 2499 2500 /*- 2501 *----------------------------------------------------------------------- 2502 * ParseFinishLine -- 2503 * Handle the end of a dependency group. 2504 * 2505 * Results: 2506 * Nothing. 2507 * 2508 * Side Effects: 2509 * inLine set FALSE. 'targets' list destroyed. 2510 * 2511 *----------------------------------------------------------------------- 2512 */ 2513 static void 2514 ParseFinishLine() 2515 { 2516 if (inLine) { 2517 Lst_ForEach(targets, Suff_EndTransform, (ClientData)NULL); 2518 Lst_Destroy (targets, ParseHasCommands); 2519 targets = NULL; 2520 inLine = FALSE; 2521 } 2522 } 2523 2524 2525 /*- 2526 *--------------------------------------------------------------------- 2527 * Parse_File -- 2528 * Parse a file into its component parts, incorporating it into the 2529 * current dependency graph. This is the main function and controls 2530 * almost every other function in this module 2531 * 2532 * Results: 2533 * None 2534 * 2535 * Side Effects: 2536 * Loads. Nodes are added to the list of all targets, nodes and links 2537 * are added to the dependency graph. etc. etc. etc. 2538 *--------------------------------------------------------------------- 2539 */ 2540 void 2541 Parse_File(name, stream) 2542 char *name; /* the name of the file being read */ 2543 FILE * stream; /* Stream open to makefile to parse */ 2544 { 2545 register char *cp, /* pointer into the line */ 2546 *line; /* the line we're working on */ 2547 2548 inLine = FALSE; 2549 fname = name; 2550 curFILE = stream; 2551 lineno = 0; 2552 fatals = 0; 2553 2554 ParseSetParseFile(fname); 2555 2556 do { 2557 while ((line = ParseReadLine ()) != NULL) { 2558 if (*line == '.') { 2559 /* 2560 * Lines that begin with the special character are either 2561 * include or undef directives. 2562 */ 2563 for (cp = line + 1; isspace ((unsigned char)*cp); cp++) { 2564 continue; 2565 } 2566 if (strncmp(cp, "include", 7) == 0 || 2567 ((cp[0] == 's' || cp[0] == '-') && 2568 strncmp(&cp[1], "include", 7) == 0)) { 2569 ParseDoInclude (cp); 2570 goto nextLine; 2571 } else if (strncmp(cp, "undef", 5) == 0) { 2572 char *cp2; 2573 for (cp += 5; isspace((unsigned char) *cp); cp++) { 2574 continue; 2575 } 2576 2577 for (cp2 = cp; !isspace((unsigned char) *cp2) && 2578 (*cp2 != '\0'); cp2++) { 2579 continue; 2580 } 2581 2582 *cp2 = '\0'; 2583 2584 Var_Delete(cp, VAR_GLOBAL); 2585 goto nextLine; 2586 } 2587 } 2588 if (*line == '#') { 2589 /* If we're this far, the line must be a comment. */ 2590 goto nextLine; 2591 } 2592 2593 if (*line == '\t') { 2594 /* 2595 * If a line starts with a tab, it can only hope to be 2596 * a creation command. 2597 */ 2598 #ifndef POSIX 2599 shellCommand: 2600 #endif 2601 for (cp = line + 1; isspace ((unsigned char)*cp); cp++) { 2602 continue; 2603 } 2604 if (*cp) { 2605 if (inLine) { 2606 /* 2607 * So long as it's not a blank line and we're actually 2608 * in a dependency spec, add the command to the list of 2609 * commands of all targets in the dependency spec 2610 */ 2611 Lst_ForEach (targets, ParseAddCmd, cp); 2612 #ifdef CLEANUP 2613 Lst_AtEnd(targCmds, (ClientData) line); 2614 #endif 2615 continue; 2616 } else { 2617 Parse_Error (PARSE_FATAL, 2618 "Unassociated shell command \"%s\"", 2619 cp); 2620 } 2621 } 2622 #ifdef SYSVINCLUDE 2623 } else if (((strncmp(line, "include", 7) == 0 && 2624 isspace((unsigned char) line[7])) || 2625 ((line[0] == 's' || line[0] == '-') && 2626 strncmp(&line[1], "include", 7) == 0 && 2627 isspace((unsigned char) line[8]))) && 2628 strchr(line, ':') == NULL) { 2629 /* 2630 * It's an S3/S5-style "include". 2631 */ 2632 ParseTraditionalInclude (line); 2633 goto nextLine; 2634 #endif 2635 } else if (Parse_IsVar (line)) { 2636 ParseFinishLine(); 2637 Parse_DoVar (line, VAR_GLOBAL); 2638 } else { 2639 /* 2640 * We now know it's a dependency line so it needs to have all 2641 * variables expanded before being parsed. Tell the variable 2642 * module to complain if some variable is undefined... 2643 * To make life easier on novices, if the line is indented we 2644 * first make sure the line has a dependency operator in it. 2645 * If it doesn't have an operator and we're in a dependency 2646 * line's script, we assume it's actually a shell command 2647 * and add it to the current list of targets. 2648 */ 2649 #ifndef POSIX 2650 Boolean nonSpace = FALSE; 2651 #endif 2652 2653 cp = line; 2654 if (isspace((unsigned char) line[0])) { 2655 while ((*cp != '\0') && isspace((unsigned char) *cp)) { 2656 cp++; 2657 } 2658 if (*cp == '\0') { 2659 goto nextLine; 2660 } 2661 #ifndef POSIX 2662 while ((*cp != ':') && (*cp != '!') && (*cp != '\0')) { 2663 nonSpace = TRUE; 2664 cp++; 2665 } 2666 #endif 2667 } 2668 2669 #ifndef POSIX 2670 if (*cp == '\0') { 2671 if (inLine) { 2672 Parse_Error (PARSE_WARNING, 2673 "Shell command needs a leading tab"); 2674 goto shellCommand; 2675 } else if (nonSpace) { 2676 Parse_Error (PARSE_FATAL, "Missing operator"); 2677 } 2678 } else { 2679 #endif 2680 ParseFinishLine(); 2681 2682 cp = Var_Subst (NULL, line, VAR_CMD, TRUE); 2683 free (line); 2684 line = cp; 2685 2686 /* 2687 * Need a non-circular list for the target nodes 2688 */ 2689 if (targets) 2690 Lst_Destroy(targets, NOFREE); 2691 2692 targets = Lst_Init (FALSE); 2693 inLine = TRUE; 2694 2695 ParseDoDependency (line); 2696 #ifndef POSIX 2697 } 2698 #endif 2699 } 2700 2701 nextLine: 2702 2703 free (line); 2704 } 2705 /* 2706 * Reached EOF, but it may be just EOF of an include file... 2707 */ 2708 } while (ParseEOF(1) == CONTINUE); 2709 2710 /* 2711 * Make sure conditionals are clean 2712 */ 2713 Cond_End(); 2714 2715 if (fatals) { 2716 (void)fprintf(stderr, 2717 "%s: Fatal errors encountered -- cannot continue\n", 2718 progname); 2719 exit (1); 2720 } 2721 } 2722 2723 /*- 2724 *--------------------------------------------------------------------- 2725 * Parse_Init -- 2726 * initialize the parsing module 2727 * 2728 * Results: 2729 * none 2730 * 2731 * Side Effects: 2732 * the parseIncPath list is initialized... 2733 *--------------------------------------------------------------------- 2734 */ 2735 void 2736 Parse_Init () 2737 { 2738 mainNode = NILGNODE; 2739 parseIncPath = Lst_Init (FALSE); 2740 sysIncPath = Lst_Init (FALSE); 2741 includes = Lst_Init (FALSE); 2742 #ifdef CLEANUP 2743 targCmds = Lst_Init (FALSE); 2744 #endif 2745 } 2746 2747 void 2748 Parse_End() 2749 { 2750 #ifdef CLEANUP 2751 Lst_Destroy(targCmds, (void (*) __P((ClientData))) free); 2752 if (targets) 2753 Lst_Destroy(targets, NOFREE); 2754 Lst_Destroy(sysIncPath, Dir_Destroy); 2755 Lst_Destroy(parseIncPath, Dir_Destroy); 2756 Lst_Destroy(includes, NOFREE); /* Should be empty now */ 2757 #endif 2758 } 2759 2760 2761 /*- 2762 *----------------------------------------------------------------------- 2763 * Parse_MainName -- 2764 * Return a Lst of the main target to create for main()'s sake. If 2765 * no such target exists, we Punt with an obnoxious error message. 2766 * 2767 * Results: 2768 * A Lst of the single node to create. 2769 * 2770 * Side Effects: 2771 * None. 2772 * 2773 *----------------------------------------------------------------------- 2774 */ 2775 Lst 2776 Parse_MainName() 2777 { 2778 Lst mainList; /* result list */ 2779 2780 mainList = Lst_Init (FALSE); 2781 2782 if (mainNode == NILGNODE) { 2783 Punt ("no target to make."); 2784 /*NOTREACHED*/ 2785 } else if (mainNode->type & OP_DOUBLEDEP) { 2786 (void) Lst_AtEnd (mainList, (ClientData)mainNode); 2787 Lst_Concat(mainList, mainNode->cohorts, LST_CONCNEW); 2788 } 2789 else 2790 (void) Lst_AtEnd (mainList, (ClientData)mainNode); 2791 return (mainList); 2792 } 2793 2794 /*- 2795 *----------------------------------------------------------------------- 2796 * ParseMark -- 2797 * Add the filename and lineno to the GNode so that we remember 2798 * where it was first defined. 2799 * 2800 * Side Effects: 2801 * None. 2802 * 2803 *----------------------------------------------------------------------- 2804 */ 2805 static void 2806 ParseMark(gn) 2807 GNode *gn; 2808 { 2809 gn->fname = strdup(fname); 2810 gn->lineno = lineno; 2811 } 2812