1 /* $NetBSD: parse.c,v 1.72 2001/08/20 12:00:55 wiz 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 1.72 2001/08/20 12:00:55 wiz 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 1.72 2001/08/20 12:00:55 wiz 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 { ".USEBEFORE", Attribute, OP_USEBEFORE }, 250 { ".WAIT", Wait, 0 }, 251 }; 252 253 static void ParseErrorInternal __P((char *, size_t, int, char *, ...)) 254 __attribute__((__format__(__printf__, 4, 5))); 255 static void ParseVErrorInternal __P((char *, size_t, int, char *, va_list)) 256 __attribute__((__format__(__printf__, 4, 0))); 257 static int ParseFindKeyword __P((char *)); 258 static int ParseLinkSrc __P((ClientData, ClientData)); 259 static int ParseDoOp __P((ClientData, ClientData)); 260 static int ParseAddDep __P((ClientData, ClientData)); 261 static void ParseDoSrc __P((int, char *, Lst)); 262 static int ParseFindMain __P((ClientData, ClientData)); 263 static int ParseAddDir __P((ClientData, ClientData)); 264 static int ParseClearPath __P((ClientData, ClientData)); 265 static void ParseDoDependency __P((char *)); 266 static int ParseAddCmd __P((ClientData, ClientData)); 267 static __inline int ParseReadc __P((void)); 268 static void ParseUnreadc __P((int)); 269 static void ParseHasCommands __P((ClientData)); 270 static void ParseDoInclude __P((char *)); 271 static void ParseSetParseFile __P((char *)); 272 #ifdef SYSVINCLUDE 273 static void ParseTraditionalInclude __P((char *)); 274 #endif 275 static int ParseEOF __P((int)); 276 static char *ParseReadLine __P((void)); 277 static char *ParseSkipLine __P((int)); 278 static void ParseFinishLine __P((void)); 279 static void ParseMark __P((GNode *)); 280 281 extern int maxJobs; 282 283 /*- 284 *---------------------------------------------------------------------- 285 * ParseFindKeyword -- 286 * Look in the table of keywords for one matching the given string. 287 * 288 * Results: 289 * The index of the keyword, or -1 if it isn't there. 290 * 291 * Side Effects: 292 * None 293 *---------------------------------------------------------------------- 294 */ 295 static int 296 ParseFindKeyword (str) 297 char *str; /* String to find */ 298 { 299 register int start, 300 end, 301 cur; 302 register int diff; 303 304 start = 0; 305 end = (sizeof(parseKeywords)/sizeof(parseKeywords[0])) - 1; 306 307 do { 308 cur = start + ((end - start) / 2); 309 diff = strcmp (str, parseKeywords[cur].name); 310 311 if (diff == 0) { 312 return (cur); 313 } else if (diff < 0) { 314 end = cur - 1; 315 } else { 316 start = cur + 1; 317 } 318 } while (start <= end); 319 return (-1); 320 } 321 322 /*- 323 * ParseVErrorInternal -- 324 * Error message abort function for parsing. Prints out the context 325 * of the error (line number and file) as well as the message with 326 * two optional arguments. 327 * 328 * Results: 329 * None 330 * 331 * Side Effects: 332 * "fatals" is incremented if the level is PARSE_FATAL. 333 */ 334 /* VARARGS */ 335 static void 336 #ifdef __STDC__ 337 ParseVErrorInternal(char *cfname, size_t clineno, int type, char *fmt, 338 va_list ap) 339 #else 340 ParseVErrorInternal(va_alist) 341 va_dcl 342 #endif 343 { 344 static Boolean fatal_warning_error_printed = FALSE; 345 346 (void)fprintf(stderr, "%s: \"", progname); 347 348 if (*cfname != '/') { 349 char *cp, *dir; 350 351 /* 352 * Nothing is more anoying than not knowing which Makefile 353 * is the culprit. 354 */ 355 dir = Var_Value(".PARSEDIR", VAR_GLOBAL, &cp); 356 if (dir == NULL || *dir == '\0' || 357 (*dir == '.' && dir[1] == '\0')) 358 dir = Var_Value(".CURDIR", VAR_GLOBAL, &cp); 359 if (dir == NULL) 360 dir = "."; 361 362 (void)fprintf(stderr, "%s/%s", dir, cfname); 363 } else 364 (void)fprintf(stderr, "%s", cfname); 365 366 (void)fprintf(stderr, "\" line %d: ", (int)clineno); 367 if (type == PARSE_WARNING) 368 (void)fprintf(stderr, "warning: "); 369 (void)vfprintf(stderr, fmt, ap); 370 va_end(ap); 371 (void)fprintf(stderr, "\n"); 372 (void)fflush(stderr); 373 if (type == PARSE_FATAL || parseWarnFatal) 374 fatals += 1; 375 if (parseWarnFatal && !fatal_warning_error_printed) { 376 Error("parsing warnings being treated as errors"); 377 fatal_warning_error_printed = TRUE; 378 } 379 } 380 381 /*- 382 * ParseErrorInternal -- 383 * Error function 384 * 385 * Results: 386 * None 387 * 388 * Side Effects: 389 * None 390 */ 391 /* VARARGS */ 392 static void 393 #ifdef __STDC__ 394 ParseErrorInternal(char *cfname, size_t clineno, int type, char *fmt, ...) 395 #else 396 ParseErrorInternal(va_alist) 397 va_dcl 398 #endif 399 { 400 va_list ap; 401 #ifdef __STDC__ 402 va_start(ap, fmt); 403 #else 404 int type; /* Error type (PARSE_WARNING, PARSE_FATAL) */ 405 char *fmt; 406 char *cfname; 407 size_t clineno; 408 409 va_start(ap); 410 cfname = va_arg(ap, char *); 411 clineno = va_arg(ap, size_t); 412 type = va_arg(ap, int); 413 fmt = va_arg(ap, char *); 414 #endif 415 416 ParseVErrorInternal(cfname, clineno, type, fmt, ap); 417 va_end(ap); 418 } 419 420 /*- 421 * Parse_Error -- 422 * External interface to ParseErrorInternal; uses the default filename 423 * Line number. 424 * 425 * Results: 426 * None 427 * 428 * Side Effects: 429 * None 430 */ 431 /* VARARGS */ 432 void 433 #ifdef __STDC__ 434 Parse_Error(int type, char *fmt, ...) 435 #else 436 Parse_Error(va_alist) 437 va_dcl 438 #endif 439 { 440 va_list ap; 441 #ifdef __STDC__ 442 va_start(ap, fmt); 443 #else 444 int type; /* Error type (PARSE_WARNING, PARSE_FATAL) */ 445 char *fmt; 446 447 va_start(ap); 448 type = va_arg(ap, int); 449 fmt = va_arg(ap, char *); 450 #endif 451 ParseVErrorInternal(fname, lineno, type, fmt, ap); 452 va_end(ap); 453 } 454 455 /*- 456 *--------------------------------------------------------------------- 457 * ParseLinkSrc -- 458 * Link the parent node to its new child. Used in a Lst_ForEach by 459 * ParseDoDependency. If the specType isn't 'Not', the parent 460 * isn't linked as a parent of the child. 461 * 462 * Results: 463 * Always = 0 464 * 465 * Side Effects: 466 * New elements are added to the parents list of cgn and the 467 * children list of cgn. the unmade field of pgn is updated 468 * to reflect the additional child. 469 *--------------------------------------------------------------------- 470 */ 471 static int 472 ParseLinkSrc (pgnp, cgnp) 473 ClientData pgnp; /* The parent node */ 474 ClientData cgnp; /* The child node */ 475 { 476 GNode *pgn = (GNode *) pgnp; 477 GNode *cgn = (GNode *) cgnp; 478 479 if ((pgn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (pgn->cohorts)) 480 pgn = (GNode *) Lst_Datum (Lst_Last (pgn->cohorts)); 481 (void)Lst_AtEnd (pgn->children, (ClientData)cgn); 482 if (specType == Not) 483 (void)Lst_AtEnd (cgn->parents, (ClientData)pgn); 484 pgn->unmade += 1; 485 return (0); 486 } 487 488 /*- 489 *--------------------------------------------------------------------- 490 * ParseDoOp -- 491 * Apply the parsed operator to the given target node. Used in a 492 * Lst_ForEach call by ParseDoDependency once all targets have 493 * been found and their operator parsed. If the previous and new 494 * operators are incompatible, a major error is taken. 495 * 496 * Results: 497 * Always 0 498 * 499 * Side Effects: 500 * The type field of the node is altered to reflect any new bits in 501 * the op. 502 *--------------------------------------------------------------------- 503 */ 504 static int 505 ParseDoOp (gnp, opp) 506 ClientData gnp; /* The node to which the operator is to be 507 * applied */ 508 ClientData opp; /* The operator to apply */ 509 { 510 GNode *gn = (GNode *) gnp; 511 int op = *(int *) opp; 512 /* 513 * If the dependency mask of the operator and the node don't match and 514 * the node has actually had an operator applied to it before, and 515 * the operator actually has some dependency information in it, complain. 516 */ 517 if (((op & OP_OPMASK) != (gn->type & OP_OPMASK)) && 518 !OP_NOP(gn->type) && !OP_NOP(op)) 519 { 520 Parse_Error (PARSE_FATAL, "Inconsistent operator for %s", gn->name); 521 return (1); 522 } 523 524 if ((op == OP_DOUBLEDEP) && ((gn->type & OP_OPMASK) == OP_DOUBLEDEP)) { 525 /* 526 * If the node was the object of a :: operator, we need to create a 527 * new instance of it for the children and commands on this dependency 528 * line. The new instance is placed on the 'cohorts' list of the 529 * initial one (note the initial one is not on its own cohorts list) 530 * and the new instance is linked to all parents of the initial 531 * instance. 532 */ 533 register GNode *cohort; 534 535 /* 536 * Propagate copied bits to the initial node. They'll be propagated 537 * back to the rest of the cohorts later. 538 */ 539 gn->type |= op & ~OP_OPMASK; 540 541 cohort = Targ_NewGN(gn->name); 542 /* 543 * Make the cohort invisible as well to avoid duplicating it into 544 * other variables. True, parents of this target won't tend to do 545 * anything with their local variables, but better safe than 546 * sorry. (I think this is pointless now, since the relevant list 547 * traversals will no longer see this node anyway. -mycroft) 548 */ 549 cohort->type = op | OP_INVISIBLE; 550 (void)Lst_AtEnd(gn->cohorts, (ClientData)cohort); 551 } else { 552 /* 553 * We don't want to nuke any previous flags (whatever they were) so we 554 * just OR the new operator into the old 555 */ 556 gn->type |= op; 557 } 558 559 return (0); 560 } 561 562 /*- 563 *--------------------------------------------------------------------- 564 * ParseAddDep -- 565 * Check if the pair of GNodes given needs to be synchronized. 566 * This has to be when two nodes are on different sides of a 567 * .WAIT directive. 568 * 569 * Results: 570 * Returns 1 if the two targets need to be ordered, 0 otherwise. 571 * If it returns 1, the search can stop 572 * 573 * Side Effects: 574 * A dependency can be added between the two nodes. 575 * 576 *--------------------------------------------------------------------- 577 */ 578 static int 579 ParseAddDep(pp, sp) 580 ClientData pp; 581 ClientData sp; 582 { 583 GNode *p = (GNode *) pp; 584 GNode *s = (GNode *) sp; 585 586 if (p->order < s->order) { 587 /* 588 * XXX: This can cause loops, and loops can cause unmade targets, 589 * but checking is tedious, and the debugging output can show the 590 * problem 591 */ 592 (void)Lst_AtEnd(p->successors, (ClientData)s); 593 (void)Lst_AtEnd(s->preds, (ClientData)p); 594 return 0; 595 } 596 else 597 return 1; 598 } 599 600 601 /*- 602 *--------------------------------------------------------------------- 603 * ParseDoSrc -- 604 * Given the name of a source, figure out if it is an attribute 605 * and apply it to the targets if it is. Else decide if there is 606 * some attribute which should be applied *to* the source because 607 * of some special target and apply it if so. Otherwise, make the 608 * source be a child of the targets in the list 'targets' 609 * 610 * Results: 611 * None 612 * 613 * Side Effects: 614 * Operator bits may be added to the list of targets or to the source. 615 * The targets may have a new source added to their lists of children. 616 *--------------------------------------------------------------------- 617 */ 618 static void 619 ParseDoSrc (tOp, src, allsrc) 620 int tOp; /* operator (if any) from special targets */ 621 char *src; /* name of the source to handle */ 622 Lst allsrc; /* List of all sources to wait for */ 623 624 { 625 GNode *gn = NULL; 626 627 if (*src == '.' && isupper ((unsigned char)src[1])) { 628 int keywd = ParseFindKeyword(src); 629 if (keywd != -1) { 630 int op = parseKeywords[keywd].op; 631 if (op != 0) { 632 Lst_ForEach (targets, ParseDoOp, (ClientData)&op); 633 return; 634 } 635 if (parseKeywords[keywd].spec == Wait) { 636 waiting++; 637 return; 638 } 639 } 640 } 641 642 switch (specType) { 643 case Main: 644 /* 645 * If we have noted the existence of a .MAIN, it means we need 646 * to add the sources of said target to the list of things 647 * to create. The string 'src' is likely to be free, so we 648 * must make a new copy of it. Note that this will only be 649 * invoked if the user didn't specify a target on the command 650 * line. This is to allow #ifmake's to succeed, or something... 651 */ 652 (void) Lst_AtEnd (create, (ClientData)estrdup(src)); 653 /* 654 * Add the name to the .TARGETS variable as well, so the user cna 655 * employ that, if desired. 656 */ 657 Var_Append(".TARGETS", src, VAR_GLOBAL); 658 return; 659 660 case Order: 661 /* 662 * Create proper predecessor/successor links between the previous 663 * source and the current one. 664 */ 665 gn = Targ_FindNode(src, TARG_CREATE); 666 if (predecessor != NILGNODE) { 667 (void)Lst_AtEnd(predecessor->successors, (ClientData)gn); 668 (void)Lst_AtEnd(gn->preds, (ClientData)predecessor); 669 } 670 /* 671 * The current source now becomes the predecessor for the next one. 672 */ 673 predecessor = gn; 674 break; 675 676 default: 677 /* 678 * If the source is not an attribute, we need to find/create 679 * a node for it. After that we can apply any operator to it 680 * from a special target or link it to its parents, as 681 * appropriate. 682 * 683 * In the case of a source that was the object of a :: operator, 684 * the attribute is applied to all of its instances (as kept in 685 * the 'cohorts' list of the node) or all the cohorts are linked 686 * to all the targets. 687 */ 688 gn = Targ_FindNode (src, TARG_CREATE); 689 if (tOp) { 690 gn->type |= tOp; 691 } else { 692 Lst_ForEach (targets, ParseLinkSrc, (ClientData)gn); 693 } 694 break; 695 } 696 697 gn->order = waiting; 698 (void)Lst_AtEnd(allsrc, (ClientData)gn); 699 if (waiting) { 700 Lst_ForEach(allsrc, ParseAddDep, (ClientData)gn); 701 } 702 } 703 704 /*- 705 *----------------------------------------------------------------------- 706 * ParseFindMain -- 707 * Find a real target in the list and set it to be the main one. 708 * Called by ParseDoDependency when a main target hasn't been found 709 * yet. 710 * 711 * Results: 712 * 0 if main not found yet, 1 if it is. 713 * 714 * Side Effects: 715 * mainNode is changed and Targ_SetMain is called. 716 * 717 *----------------------------------------------------------------------- 718 */ 719 static int 720 ParseFindMain(gnp, dummy) 721 ClientData gnp; /* Node to examine */ 722 ClientData dummy; 723 { 724 GNode *gn = (GNode *) gnp; 725 if ((gn->type & OP_NOTARGET) == 0) { 726 mainNode = gn; 727 Targ_SetMain(gn); 728 return (dummy ? 1 : 1); 729 } else { 730 return (dummy ? 0 : 0); 731 } 732 } 733 734 /*- 735 *----------------------------------------------------------------------- 736 * ParseAddDir -- 737 * Front-end for Dir_AddDir to make sure Lst_ForEach keeps going 738 * 739 * Results: 740 * === 0 741 * 742 * Side Effects: 743 * See Dir_AddDir. 744 * 745 *----------------------------------------------------------------------- 746 */ 747 static int 748 ParseAddDir(path, name) 749 ClientData path; 750 ClientData name; 751 { 752 (void) Dir_AddDir((Lst) path, (char *) name); 753 return(0); 754 } 755 756 /*- 757 *----------------------------------------------------------------------- 758 * ParseClearPath -- 759 * Front-end for Dir_ClearPath to make sure Lst_ForEach keeps going 760 * 761 * Results: 762 * === 0 763 * 764 * Side Effects: 765 * See Dir_ClearPath 766 * 767 *----------------------------------------------------------------------- 768 */ 769 static int 770 ParseClearPath(path, dummy) 771 ClientData path; 772 ClientData dummy; 773 { 774 Dir_ClearPath((Lst) path); 775 return(dummy ? 0 : 0); 776 } 777 778 /*- 779 *--------------------------------------------------------------------- 780 * ParseDoDependency -- 781 * Parse the dependency line in line. 782 * 783 * Results: 784 * None 785 * 786 * Side Effects: 787 * The nodes of the sources are linked as children to the nodes of the 788 * targets. Some nodes may be created. 789 * 790 * We parse a dependency line by first extracting words from the line and 791 * finding nodes in the list of all targets with that name. This is done 792 * until a character is encountered which is an operator character. Currently 793 * these are only ! and :. At this point the operator is parsed and the 794 * pointer into the line advanced until the first source is encountered. 795 * The parsed operator is applied to each node in the 'targets' list, 796 * which is where the nodes found for the targets are kept, by means of 797 * the ParseDoOp function. 798 * The sources are read in much the same way as the targets were except 799 * that now they are expanded using the wildcarding scheme of the C-Shell 800 * and all instances of the resulting words in the list of all targets 801 * are found. Each of the resulting nodes is then linked to each of the 802 * targets as one of its children. 803 * Certain targets are handled specially. These are the ones detailed 804 * by the specType variable. 805 * The storing of transformation rules is also taken care of here. 806 * A target is recognized as a transformation rule by calling 807 * Suff_IsTransform. If it is a transformation rule, its node is gotten 808 * from the suffix module via Suff_AddTransform rather than the standard 809 * Targ_FindNode in the target module. 810 *--------------------------------------------------------------------- 811 */ 812 static void 813 ParseDoDependency (line) 814 char *line; /* the line to parse */ 815 { 816 char *cp; /* our current position */ 817 GNode *gn; /* a general purpose temporary node */ 818 int op; /* the operator on the line */ 819 char savec; /* a place to save a character */ 820 Lst paths; /* List of search paths to alter when parsing 821 * a list of .PATH targets */ 822 int tOp; /* operator from special target */ 823 Lst sources; /* list of archive source names after 824 * expansion */ 825 Lst curTargs; /* list of target names to be found and added 826 * to the targets list */ 827 Lst curSrcs; /* list of sources in order */ 828 829 tOp = 0; 830 831 specType = Not; 832 waiting = 0; 833 paths = (Lst)NULL; 834 835 curTargs = Lst_Init(FALSE); 836 curSrcs = Lst_Init(FALSE); 837 838 do { 839 for (cp = line; 840 *cp && !isspace ((unsigned char)*cp) && 841 (*cp != '!') && (*cp != ':') && (*cp != '('); 842 cp++) 843 { 844 if (*cp == '$') { 845 /* 846 * Must be a dynamic source (would have been expanded 847 * otherwise), so call the Var module to parse the puppy 848 * so we can safely advance beyond it...There should be 849 * no errors in this, as they would have been discovered 850 * in the initial Var_Subst and we wouldn't be here. 851 */ 852 int length; 853 Boolean freeIt; 854 char *result; 855 856 result=Var_Parse(cp, VAR_CMD, TRUE, &length, &freeIt); 857 858 if (freeIt) { 859 free(result); 860 } 861 cp += length-1; 862 } 863 continue; 864 } 865 if (*cp == '(') { 866 /* 867 * Archives must be handled specially to make sure the OP_ARCHV 868 * flag is set in their 'type' field, for one thing, and because 869 * things like "archive(file1.o file2.o file3.o)" are permissible. 870 * Arch_ParseArchive will set 'line' to be the first non-blank 871 * after the archive-spec. It creates/finds nodes for the members 872 * and places them on the given list, returning SUCCESS if all 873 * went well and FAILURE if there was an error in the 874 * specification. On error, line should remain untouched. 875 */ 876 if (Arch_ParseArchive (&line, targets, VAR_CMD) != SUCCESS) { 877 Parse_Error (PARSE_FATAL, 878 "Error in archive specification: \"%s\"", line); 879 return; 880 } else { 881 continue; 882 } 883 } 884 savec = *cp; 885 886 if (!*cp) { 887 /* 888 * Ending a dependency line without an operator is a Bozo 889 * no-no. As a heuristic, this is also often triggered by 890 * undetected conflicts from cvs/rcs merges. 891 */ 892 if ((strncmp(line, "<<<<<<", 6) == 0) || 893 (strncmp(line, "======", 6) == 0) || 894 (strncmp(line, ">>>>>>", 6) == 0)) 895 Parse_Error (PARSE_FATAL, 896 "Makefile appears to contain unresolved cvs/rcs/??? merge conflicts"); 897 else 898 Parse_Error (PARSE_FATAL, "Need an operator"); 899 return; 900 } 901 *cp = '\0'; 902 /* 903 * Have a word in line. See if it's a special target and set 904 * specType to match it. 905 */ 906 if (*line == '.' && isupper ((unsigned char)line[1])) { 907 /* 908 * See if the target is a special target that must have it 909 * or its sources handled specially. 910 */ 911 int keywd = ParseFindKeyword(line); 912 if (keywd != -1) { 913 if (specType == ExPath && parseKeywords[keywd].spec != ExPath) { 914 Parse_Error(PARSE_FATAL, "Mismatched special targets"); 915 return; 916 } 917 918 specType = parseKeywords[keywd].spec; 919 tOp = parseKeywords[keywd].op; 920 921 /* 922 * Certain special targets have special semantics: 923 * .PATH Have to set the dirSearchPath 924 * variable too 925 * .MAIN Its sources are only used if 926 * nothing has been specified to 927 * create. 928 * .DEFAULT Need to create a node to hang 929 * commands on, but we don't want 930 * it in the graph, nor do we want 931 * it to be the Main Target, so we 932 * create it, set OP_NOTMAIN and 933 * add it to the list, setting 934 * DEFAULT to the new node for 935 * later use. We claim the node is 936 * A transformation rule to make 937 * life easier later, when we'll 938 * use Make_HandleUse to actually 939 * apply the .DEFAULT commands. 940 * .PHONY The list of targets 941 * .NOPATH Don't search for file in the path 942 * .BEGIN 943 * .END 944 * .INTERRUPT Are not to be considered the 945 * main target. 946 * .NOTPARALLEL Make only one target at a time. 947 * .SINGLESHELL Create a shell for each command. 948 * .ORDER Must set initial predecessor to NIL 949 */ 950 switch (specType) { 951 case ExPath: 952 if (paths == NULL) { 953 paths = Lst_Init(FALSE); 954 } 955 (void)Lst_AtEnd(paths, (ClientData)dirSearchPath); 956 break; 957 case Main: 958 if (!Lst_IsEmpty(create)) { 959 specType = Not; 960 } 961 break; 962 case Begin: 963 case End: 964 case Interrupt: 965 gn = Targ_FindNode(line, TARG_CREATE); 966 gn->type |= OP_NOTMAIN; 967 (void)Lst_AtEnd(targets, (ClientData)gn); 968 break; 969 case Default: 970 gn = Targ_NewGN(".DEFAULT"); 971 gn->type |= (OP_NOTMAIN|OP_TRANSFORM); 972 (void)Lst_AtEnd(targets, (ClientData)gn); 973 DEFAULT = gn; 974 break; 975 case NotParallel: 976 { 977 maxJobs = 1; 978 break; 979 } 980 case SingleShell: 981 compatMake = TRUE; 982 break; 983 case Order: 984 predecessor = NILGNODE; 985 break; 986 default: 987 break; 988 } 989 } else if (strncmp (line, ".PATH", 5) == 0) { 990 /* 991 * .PATH<suffix> has to be handled specially. 992 * Call on the suffix module to give us a path to 993 * modify. 994 */ 995 Lst path; 996 997 specType = ExPath; 998 path = Suff_GetPath (&line[5]); 999 if (path == NILLST) { 1000 Parse_Error (PARSE_FATAL, 1001 "Suffix '%s' not defined (yet)", 1002 &line[5]); 1003 return; 1004 } else { 1005 if (paths == (Lst)NULL) { 1006 paths = Lst_Init(FALSE); 1007 } 1008 (void)Lst_AtEnd(paths, (ClientData)path); 1009 } 1010 } 1011 } 1012 1013 /* 1014 * Have word in line. Get or create its node and stick it at 1015 * the end of the targets list 1016 */ 1017 if ((specType == Not) && (*line != '\0')) { 1018 if (Dir_HasWildcards(line)) { 1019 /* 1020 * Targets are to be sought only in the current directory, 1021 * so create an empty path for the thing. Note we need to 1022 * use Dir_Destroy in the destruction of the path as the 1023 * Dir module could have added a directory to the path... 1024 */ 1025 Lst emptyPath = Lst_Init(FALSE); 1026 1027 Dir_Expand(line, emptyPath, curTargs); 1028 1029 Lst_Destroy(emptyPath, Dir_Destroy); 1030 } else { 1031 /* 1032 * No wildcards, but we want to avoid code duplication, 1033 * so create a list with the word on it. 1034 */ 1035 (void)Lst_AtEnd(curTargs, (ClientData)line); 1036 } 1037 1038 while(!Lst_IsEmpty(curTargs)) { 1039 char *targName = (char *)Lst_DeQueue(curTargs); 1040 1041 if (!Suff_IsTransform (targName)) { 1042 gn = Targ_FindNode (targName, TARG_CREATE); 1043 } else { 1044 gn = Suff_AddTransform (targName); 1045 } 1046 1047 (void)Lst_AtEnd (targets, (ClientData)gn); 1048 } 1049 } else if (specType == ExPath && *line != '.' && *line != '\0') { 1050 Parse_Error(PARSE_WARNING, "Extra target (%s) ignored", line); 1051 } 1052 1053 *cp = savec; 1054 /* 1055 * If it is a special type and not .PATH, it's the only target we 1056 * allow on this line... 1057 */ 1058 if (specType != Not && specType != ExPath) { 1059 Boolean warn = FALSE; 1060 1061 while ((*cp != '!') && (*cp != ':') && *cp) { 1062 if (*cp != ' ' && *cp != '\t') { 1063 warn = TRUE; 1064 } 1065 cp++; 1066 } 1067 if (warn) { 1068 Parse_Error(PARSE_WARNING, "Extra target ignored"); 1069 } 1070 } else { 1071 while (*cp && isspace ((unsigned char)*cp)) { 1072 cp++; 1073 } 1074 } 1075 line = cp; 1076 } while ((*line != '!') && (*line != ':') && *line); 1077 1078 /* 1079 * Don't need the list of target names anymore... 1080 */ 1081 Lst_Destroy(curTargs, NOFREE); 1082 1083 if (!Lst_IsEmpty(targets)) { 1084 switch(specType) { 1085 default: 1086 Parse_Error(PARSE_WARNING, "Special and mundane targets don't mix. Mundane ones ignored"); 1087 break; 1088 case Default: 1089 case Begin: 1090 case End: 1091 case Interrupt: 1092 /* 1093 * These four create nodes on which to hang commands, so 1094 * targets shouldn't be empty... 1095 */ 1096 case Not: 1097 /* 1098 * Nothing special here -- targets can be empty if it wants. 1099 */ 1100 break; 1101 } 1102 } 1103 1104 /* 1105 * Have now parsed all the target names. Must parse the operator next. The 1106 * result is left in op . 1107 */ 1108 if (*cp == '!') { 1109 op = OP_FORCE; 1110 } else if (*cp == ':') { 1111 if (cp[1] == ':') { 1112 op = OP_DOUBLEDEP; 1113 cp++; 1114 } else { 1115 op = OP_DEPENDS; 1116 } 1117 } else { 1118 Parse_Error (PARSE_FATAL, "Missing dependency operator"); 1119 return; 1120 } 1121 1122 cp++; /* Advance beyond operator */ 1123 1124 Lst_ForEach (targets, ParseDoOp, (ClientData)&op); 1125 1126 /* 1127 * Get to the first source 1128 */ 1129 while (*cp && isspace ((unsigned char)*cp)) { 1130 cp++; 1131 } 1132 line = cp; 1133 1134 /* 1135 * Several special targets take different actions if present with no 1136 * sources: 1137 * a .SUFFIXES line with no sources clears out all old suffixes 1138 * a .PRECIOUS line makes all targets precious 1139 * a .IGNORE line ignores errors for all targets 1140 * a .SILENT line creates silence when making all targets 1141 * a .PATH removes all directories from the search path(s). 1142 */ 1143 if (!*line) { 1144 switch (specType) { 1145 case Suffixes: 1146 Suff_ClearSuffixes (); 1147 break; 1148 case Precious: 1149 allPrecious = TRUE; 1150 break; 1151 case Ignore: 1152 ignoreErrors = TRUE; 1153 break; 1154 case Silent: 1155 beSilent = TRUE; 1156 break; 1157 case ExPath: 1158 Lst_ForEach(paths, ParseClearPath, (ClientData)NULL); 1159 break; 1160 #ifdef POSIX 1161 case Posix: 1162 Var_Set("%POSIX", "1003.2", VAR_GLOBAL, 0); 1163 break; 1164 #endif 1165 default: 1166 break; 1167 } 1168 } else if (specType == MFlags) { 1169 /* 1170 * Call on functions in main.c to deal with these arguments and 1171 * set the initial character to a null-character so the loop to 1172 * get sources won't get anything 1173 */ 1174 Main_ParseArgLine (line); 1175 *line = '\0'; 1176 } else if (specType == ExShell) { 1177 if (Job_ParseShell (line) != SUCCESS) { 1178 Parse_Error (PARSE_FATAL, "improper shell specification"); 1179 return; 1180 } 1181 *line = '\0'; 1182 } else if ((specType == NotParallel) || (specType == SingleShell)) { 1183 *line = '\0'; 1184 } 1185 1186 /* 1187 * NOW GO FOR THE SOURCES 1188 */ 1189 if ((specType == Suffixes) || (specType == ExPath) || 1190 (specType == Includes) || (specType == Libs) || 1191 (specType == Null)) 1192 { 1193 while (*line) { 1194 /* 1195 * If the target was one that doesn't take files as its sources 1196 * but takes something like suffixes, we take each 1197 * space-separated word on the line as a something and deal 1198 * with it accordingly. 1199 * 1200 * If the target was .SUFFIXES, we take each source as a 1201 * suffix and add it to the list of suffixes maintained by the 1202 * Suff module. 1203 * 1204 * If the target was a .PATH, we add the source as a directory 1205 * to search on the search path. 1206 * 1207 * If it was .INCLUDES, the source is taken to be the suffix of 1208 * files which will be #included and whose search path should 1209 * be present in the .INCLUDES variable. 1210 * 1211 * If it was .LIBS, the source is taken to be the suffix of 1212 * files which are considered libraries and whose search path 1213 * should be present in the .LIBS variable. 1214 * 1215 * If it was .NULL, the source is the suffix to use when a file 1216 * has no valid suffix. 1217 */ 1218 char savec; 1219 while (*cp && !isspace ((unsigned char)*cp)) { 1220 cp++; 1221 } 1222 savec = *cp; 1223 *cp = '\0'; 1224 switch (specType) { 1225 case Suffixes: 1226 Suff_AddSuffix (line, &mainNode); 1227 break; 1228 case ExPath: 1229 Lst_ForEach(paths, ParseAddDir, (ClientData)line); 1230 break; 1231 case Includes: 1232 Suff_AddInclude (line); 1233 break; 1234 case Libs: 1235 Suff_AddLib (line); 1236 break; 1237 case Null: 1238 Suff_SetNull (line); 1239 break; 1240 default: 1241 break; 1242 } 1243 *cp = savec; 1244 if (savec != '\0') { 1245 cp++; 1246 } 1247 while (*cp && isspace ((unsigned char)*cp)) { 1248 cp++; 1249 } 1250 line = cp; 1251 } 1252 if (paths) { 1253 Lst_Destroy(paths, NOFREE); 1254 } 1255 } else { 1256 while (*line) { 1257 /* 1258 * The targets take real sources, so we must beware of archive 1259 * specifications (i.e. things with left parentheses in them) 1260 * and handle them accordingly. 1261 */ 1262 while (*cp && !isspace ((unsigned char)*cp)) { 1263 if ((*cp == '(') && (cp > line) && (cp[-1] != '$')) { 1264 /* 1265 * Only stop for a left parenthesis if it isn't at the 1266 * start of a word (that'll be for variable changes 1267 * later) and isn't preceded by a dollar sign (a dynamic 1268 * source). 1269 */ 1270 break; 1271 } else { 1272 cp++; 1273 } 1274 } 1275 1276 if (*cp == '(') { 1277 GNode *gn; 1278 1279 sources = Lst_Init (FALSE); 1280 if (Arch_ParseArchive (&line, sources, VAR_CMD) != SUCCESS) { 1281 Parse_Error (PARSE_FATAL, 1282 "Error in source archive spec \"%s\"", line); 1283 return; 1284 } 1285 1286 while (!Lst_IsEmpty (sources)) { 1287 gn = (GNode *) Lst_DeQueue (sources); 1288 ParseDoSrc (tOp, gn->name, curSrcs); 1289 } 1290 Lst_Destroy (sources, NOFREE); 1291 cp = line; 1292 } else { 1293 if (*cp) { 1294 *cp = '\0'; 1295 cp += 1; 1296 } 1297 1298 ParseDoSrc (tOp, line, curSrcs); 1299 } 1300 while (*cp && isspace ((unsigned char)*cp)) { 1301 cp++; 1302 } 1303 line = cp; 1304 } 1305 } 1306 1307 if (mainNode == NILGNODE) { 1308 /* 1309 * If we have yet to decide on a main target to make, in the 1310 * absence of any user input, we want the first target on 1311 * the first dependency line that is actually a real target 1312 * (i.e. isn't a .USE or .EXEC rule) to be made. 1313 */ 1314 Lst_ForEach (targets, ParseFindMain, (ClientData)0); 1315 } 1316 1317 /* 1318 * Finally, destroy the list of sources 1319 */ 1320 Lst_Destroy(curSrcs, NOFREE); 1321 } 1322 1323 /*- 1324 *--------------------------------------------------------------------- 1325 * Parse_IsVar -- 1326 * Return TRUE if the passed line is a variable assignment. A variable 1327 * assignment consists of a single word followed by optional whitespace 1328 * followed by either a += or an = operator. 1329 * This function is used both by the Parse_File function and main when 1330 * parsing the command-line arguments. 1331 * 1332 * Results: 1333 * TRUE if it is. FALSE if it ain't 1334 * 1335 * Side Effects: 1336 * none 1337 *--------------------------------------------------------------------- 1338 */ 1339 Boolean 1340 Parse_IsVar (line) 1341 register char *line; /* the line to check */ 1342 { 1343 register Boolean wasSpace = FALSE; /* set TRUE if found a space */ 1344 register Boolean haveName = FALSE; /* Set TRUE if have a variable name */ 1345 int level = 0; 1346 #define ISEQOPERATOR(c) \ 1347 (((c) == '+') || ((c) == ':') || ((c) == '?') || ((c) == '!')) 1348 1349 /* 1350 * Skip to variable name 1351 */ 1352 for (;(*line == ' ') || (*line == '\t'); line++) 1353 continue; 1354 1355 for (; *line != '=' || level != 0; line++) 1356 switch (*line) { 1357 case '\0': 1358 /* 1359 * end-of-line -- can't be a variable assignment. 1360 */ 1361 return FALSE; 1362 1363 case ' ': 1364 case '\t': 1365 /* 1366 * there can be as much white space as desired so long as there is 1367 * only one word before the operator 1368 */ 1369 wasSpace = TRUE; 1370 break; 1371 1372 case '(': 1373 case '{': 1374 level++; 1375 break; 1376 1377 case '}': 1378 case ')': 1379 level--; 1380 break; 1381 1382 default: 1383 if (wasSpace && haveName) { 1384 if (ISEQOPERATOR(*line)) { 1385 /* 1386 * We must have a finished word 1387 */ 1388 if (level != 0) 1389 return FALSE; 1390 1391 /* 1392 * When an = operator [+?!:] is found, the next 1393 * character must be an = or it ain't a valid 1394 * assignment. 1395 */ 1396 if (line[1] == '=') 1397 return haveName; 1398 #ifdef SUNSHCMD 1399 /* 1400 * This is a shell command 1401 */ 1402 if (strncmp(line, ":sh", 3) == 0) 1403 return haveName; 1404 #endif 1405 } 1406 /* 1407 * This is the start of another word, so not assignment. 1408 */ 1409 return FALSE; 1410 } 1411 else { 1412 haveName = TRUE; 1413 wasSpace = FALSE; 1414 } 1415 break; 1416 } 1417 1418 return haveName; 1419 } 1420 1421 /*- 1422 *--------------------------------------------------------------------- 1423 * Parse_DoVar -- 1424 * Take the variable assignment in the passed line and do it in the 1425 * global context. 1426 * 1427 * Note: There is a lexical ambiguity with assignment modifier characters 1428 * in variable names. This routine interprets the character before the = 1429 * as a modifier. Therefore, an assignment like 1430 * C++=/usr/bin/CC 1431 * is interpreted as "C+ +=" instead of "C++ =". 1432 * 1433 * Results: 1434 * none 1435 * 1436 * Side Effects: 1437 * the variable structure of the given variable name is altered in the 1438 * global context. 1439 *--------------------------------------------------------------------- 1440 */ 1441 void 1442 Parse_DoVar (line, ctxt) 1443 char *line; /* a line guaranteed to be a variable 1444 * assignment. This reduces error checks */ 1445 GNode *ctxt; /* Context in which to do the assignment */ 1446 { 1447 char *cp; /* pointer into line */ 1448 enum { 1449 VAR_SUBST, VAR_APPEND, VAR_SHELL, VAR_NORMAL 1450 } type; /* Type of assignment */ 1451 char *opc; /* ptr to operator character to 1452 * null-terminate the variable name */ 1453 /* 1454 * Avoid clobbered variable warnings by forcing the compiler 1455 * to ``unregister'' variables 1456 */ 1457 #if __GNUC__ 1458 (void) &cp; 1459 (void) &line; 1460 #endif 1461 1462 /* 1463 * Skip to variable name 1464 */ 1465 while ((*line == ' ') || (*line == '\t')) { 1466 line++; 1467 } 1468 1469 /* 1470 * Skip to operator character, nulling out whitespace as we go 1471 */ 1472 for (cp = line + 1; *cp != '='; cp++) { 1473 if (isspace ((unsigned char)*cp)) { 1474 *cp = '\0'; 1475 } 1476 } 1477 opc = cp-1; /* operator is the previous character */ 1478 *cp++ = '\0'; /* nuke the = */ 1479 1480 /* 1481 * Check operator type 1482 */ 1483 switch (*opc) { 1484 case '+': 1485 type = VAR_APPEND; 1486 *opc = '\0'; 1487 break; 1488 1489 case '?': 1490 /* 1491 * If the variable already has a value, we don't do anything. 1492 */ 1493 *opc = '\0'; 1494 if (Var_Exists(line, ctxt)) { 1495 return; 1496 } else { 1497 type = VAR_NORMAL; 1498 } 1499 break; 1500 1501 case ':': 1502 type = VAR_SUBST; 1503 *opc = '\0'; 1504 break; 1505 1506 case '!': 1507 type = VAR_SHELL; 1508 *opc = '\0'; 1509 break; 1510 1511 default: 1512 #ifdef SUNSHCMD 1513 while (opc > line && *opc != ':') 1514 opc--; 1515 1516 if (strncmp(opc, ":sh", 3) == 0) { 1517 type = VAR_SHELL; 1518 *opc = '\0'; 1519 break; 1520 } 1521 #endif 1522 type = VAR_NORMAL; 1523 break; 1524 } 1525 1526 while (isspace ((unsigned char)*cp)) { 1527 cp++; 1528 } 1529 1530 if (type == VAR_APPEND) { 1531 Var_Append (line, cp, ctxt); 1532 } else if (type == VAR_SUBST) { 1533 /* 1534 * Allow variables in the old value to be undefined, but leave their 1535 * invocation alone -- this is done by forcing oldVars to be false. 1536 * XXX: This can cause recursive variables, but that's not hard to do, 1537 * and this allows someone to do something like 1538 * 1539 * CFLAGS = $(.INCLUDES) 1540 * CFLAGS := -I.. $(CFLAGS) 1541 * 1542 * And not get an error. 1543 */ 1544 Boolean oldOldVars = oldVars; 1545 1546 oldVars = FALSE; 1547 1548 /* 1549 * make sure that we set the variable the first time to nothing 1550 * so that it gets substituted! 1551 */ 1552 if (!Var_Exists(line, ctxt)) 1553 Var_Set(line, "", ctxt, 0); 1554 1555 cp = Var_Subst(NULL, cp, ctxt, FALSE); 1556 oldVars = oldOldVars; 1557 1558 Var_Set(line, cp, ctxt, 0); 1559 free(cp); 1560 } else if (type == VAR_SHELL) { 1561 Boolean freeCmd = FALSE; /* TRUE if the command needs to be freed, i.e. 1562 * if any variable expansion was performed */ 1563 char *res, *err; 1564 1565 if (strchr(cp, '$') != NULL) { 1566 /* 1567 * There's a dollar sign in the command, so perform variable 1568 * expansion on the whole thing. The resulting string will need 1569 * freeing when we're done, so set freeCmd to TRUE. 1570 */ 1571 cp = Var_Subst(NULL, cp, VAR_CMD, TRUE); 1572 freeCmd = TRUE; 1573 } 1574 1575 res = Cmd_Exec(cp, &err); 1576 Var_Set(line, res, ctxt, 0); 1577 free(res); 1578 1579 if (err) 1580 Parse_Error(PARSE_WARNING, err, cp); 1581 1582 if (freeCmd) 1583 free(cp); 1584 } else { 1585 /* 1586 * Normal assignment -- just do it. 1587 */ 1588 Var_Set(line, cp, ctxt, 0); 1589 } 1590 if (strcmp(line, MAKEOVERRIDES) == 0) 1591 ExportMAKEFLAGS(0); /* re-export MAKEFLAGS */ 1592 } 1593 1594 1595 /*- 1596 * ParseAddCmd -- 1597 * Lst_ForEach function to add a command line to all targets 1598 * 1599 * Results: 1600 * Always 0 1601 * 1602 * Side Effects: 1603 * A new element is added to the commands list of the node. 1604 */ 1605 static int 1606 ParseAddCmd(gnp, cmd) 1607 ClientData gnp; /* the node to which the command is to be added */ 1608 ClientData cmd; /* the command to add */ 1609 { 1610 GNode *gn = (GNode *) gnp; 1611 /* if target already supplied, ignore commands */ 1612 if ((gn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (gn->cohorts)) 1613 gn = (GNode *) Lst_Datum (Lst_Last (gn->cohorts)); 1614 if (!(gn->type & OP_HAS_COMMANDS)) { 1615 (void)Lst_AtEnd(gn->commands, cmd); 1616 ParseMark(gn); 1617 } else { 1618 #ifdef notyet 1619 /* XXX: We cannot do this until we fix the tree */ 1620 (void)Lst_AtEnd(gn->commands, cmd); 1621 Parse_Error (PARSE_WARNING, 1622 "overriding commands for target \"%s\"; " 1623 "previous commands defined at %s: %d ignored", 1624 gn->name, gn->fname, gn->lineno); 1625 #else 1626 Parse_Error (PARSE_WARNING, 1627 "duplicate script for target \"%s\" ignored", 1628 gn->name); 1629 ParseErrorInternal (gn->fname, gn->lineno, PARSE_WARNING, 1630 "using previous script for \"%s\" defined here", 1631 gn->name); 1632 #endif 1633 } 1634 return(0); 1635 } 1636 1637 /*- 1638 *----------------------------------------------------------------------- 1639 * ParseHasCommands -- 1640 * Callback procedure for Parse_File when destroying the list of 1641 * targets on the last dependency line. Marks a target as already 1642 * having commands if it does, to keep from having shell commands 1643 * on multiple dependency lines. 1644 * 1645 * Results: 1646 * None 1647 * 1648 * Side Effects: 1649 * OP_HAS_COMMANDS may be set for the target. 1650 * 1651 *----------------------------------------------------------------------- 1652 */ 1653 static void 1654 ParseHasCommands(gnp) 1655 ClientData gnp; /* Node to examine */ 1656 { 1657 GNode *gn = (GNode *) gnp; 1658 if (!Lst_IsEmpty(gn->commands)) { 1659 gn->type |= OP_HAS_COMMANDS; 1660 } 1661 } 1662 1663 /*- 1664 *----------------------------------------------------------------------- 1665 * Parse_AddIncludeDir -- 1666 * Add a directory to the path searched for included makefiles 1667 * bracketed by double-quotes. Used by functions in main.c 1668 * 1669 * Results: 1670 * None. 1671 * 1672 * Side Effects: 1673 * The directory is appended to the list. 1674 * 1675 *----------------------------------------------------------------------- 1676 */ 1677 void 1678 Parse_AddIncludeDir (dir) 1679 char *dir; /* The name of the directory to add */ 1680 { 1681 (void) Dir_AddDir (parseIncPath, dir); 1682 } 1683 1684 /*- 1685 *--------------------------------------------------------------------- 1686 * ParseDoInclude -- 1687 * Push to another file. 1688 * 1689 * The input is the line minus the `.'. A file spec is a string 1690 * enclosed in <> or "". The former is looked for only in sysIncPath. 1691 * The latter in . and the directories specified by -I command line 1692 * options 1693 * 1694 * Results: 1695 * None 1696 * 1697 * Side Effects: 1698 * A structure is added to the includes Lst and readProc, lineno, 1699 * fname and curFILE are altered for the new file 1700 *--------------------------------------------------------------------- 1701 */ 1702 static void 1703 ParseDoInclude (line) 1704 char *line; 1705 { 1706 char *fullname; /* full pathname of file */ 1707 IFile *oldFile; /* state associated with current file */ 1708 char endc; /* the character which ends the file spec */ 1709 char *cp; /* current position in file spec */ 1710 Boolean isSystem; /* TRUE if makefile is a system makefile */ 1711 int silent = (*line != 'i') ? 1 : 0; 1712 char *file = &line[7 + silent]; 1713 1714 /* 1715 * Skip to delimiter character so we know where to look 1716 */ 1717 while ((*file == ' ') || (*file == '\t')) { 1718 file++; 1719 } 1720 1721 if ((*file != '"') && (*file != '<')) { 1722 Parse_Error (PARSE_FATAL, 1723 ".include filename must be delimited by '\"' or '<'"); 1724 return; 1725 } 1726 1727 /* 1728 * Set the search path on which to find the include file based on the 1729 * characters which bracket its name. Angle-brackets imply it's 1730 * a system Makefile while double-quotes imply it's a user makefile 1731 */ 1732 if (*file == '<') { 1733 isSystem = TRUE; 1734 endc = '>'; 1735 } else { 1736 isSystem = FALSE; 1737 endc = '"'; 1738 } 1739 1740 /* 1741 * Skip to matching delimiter 1742 */ 1743 for (cp = ++file; *cp && *cp != endc; cp++) { 1744 continue; 1745 } 1746 1747 if (*cp != endc) { 1748 Parse_Error (PARSE_FATAL, 1749 "Unclosed %cinclude filename. '%c' expected", 1750 '.', endc); 1751 return; 1752 } 1753 *cp = '\0'; 1754 1755 /* 1756 * Substitute for any variables in the file name before trying to 1757 * find the thing. 1758 */ 1759 file = Var_Subst (NULL, file, VAR_CMD, FALSE); 1760 1761 /* 1762 * Now we know the file's name and its search path, we attempt to 1763 * find the durn thing. A return of NULL indicates the file don't 1764 * exist. 1765 */ 1766 if (!isSystem) { 1767 /* 1768 * Include files contained in double-quotes are first searched for 1769 * relative to the including file's location. We don't want to 1770 * cd there, of course, so we just tack on the old file's 1771 * leading path components and call Dir_FindFile to see if 1772 * we can locate the beast. 1773 */ 1774 char *prefEnd, *Fname; 1775 1776 /* Make a temporary copy of this, to be safe. */ 1777 Fname = estrdup(fname); 1778 1779 prefEnd = strrchr (Fname, '/'); 1780 if (prefEnd != (char *)NULL) { 1781 char *newName; 1782 1783 *prefEnd = '\0'; 1784 if (file[0] == '/') 1785 newName = estrdup(file); 1786 else 1787 newName = str_concat (Fname, file, STR_ADDSLASH); 1788 fullname = Dir_FindFile (newName, parseIncPath); 1789 if (fullname == (char *)NULL) { 1790 fullname = Dir_FindFile(newName, dirSearchPath); 1791 } 1792 free (newName); 1793 *prefEnd = '/'; 1794 } else { 1795 fullname = (char *)NULL; 1796 } 1797 free (Fname); 1798 } else { 1799 fullname = (char *)NULL; 1800 } 1801 1802 if (fullname == (char *)NULL) { 1803 /* 1804 * System makefile or makefile wasn't found in same directory as 1805 * included makefile. Search for it first on the -I search path, 1806 * then on the .PATH search path, if not found in a -I directory. 1807 * XXX: Suffix specific? 1808 */ 1809 fullname = Dir_FindFile (file, parseIncPath); 1810 if (fullname == (char *)NULL) { 1811 fullname = Dir_FindFile(file, dirSearchPath); 1812 } 1813 } 1814 1815 if (fullname == (char *)NULL) { 1816 /* 1817 * Still haven't found the makefile. Look for it on the system 1818 * path as a last resort. 1819 */ 1820 fullname = Dir_FindFile(file, sysIncPath); 1821 } 1822 1823 if (fullname == (char *) NULL) { 1824 *cp = endc; 1825 if (!silent) 1826 Parse_Error (PARSE_FATAL, "Could not find %s", file); 1827 return; 1828 } 1829 1830 free(file); 1831 1832 /* 1833 * Once we find the absolute path to the file, we get to save all the 1834 * state from the current file before we can start reading this 1835 * include file. The state is stored in an IFile structure which 1836 * is placed on a list with other IFile structures. The list makes 1837 * a very nice stack to track how we got here... 1838 */ 1839 oldFile = (IFile *) emalloc (sizeof (IFile)); 1840 oldFile->fname = fname; 1841 1842 oldFile->F = curFILE; 1843 oldFile->p = curPTR; 1844 oldFile->lineno = lineno; 1845 1846 (void) Lst_AtFront (includes, (ClientData)oldFile); 1847 1848 /* 1849 * Once the previous state has been saved, we can get down to reading 1850 * the new file. We set up the name of the file to be the absolute 1851 * name of the include file so error messages refer to the right 1852 * place. Naturally enough, we start reading at line number 0. 1853 */ 1854 fname = fullname; 1855 lineno = 0; 1856 1857 ParseSetParseFile(fname); 1858 1859 curFILE = fopen (fullname, "r"); 1860 curPTR = NULL; 1861 if (curFILE == (FILE * ) NULL) { 1862 if (!silent) 1863 Parse_Error (PARSE_FATAL, "Cannot open %s", fullname); 1864 /* 1865 * Pop to previous file 1866 */ 1867 (void) ParseEOF(0); 1868 } 1869 } 1870 1871 1872 /*- 1873 *--------------------------------------------------------------------- 1874 * ParseSetParseFile -- 1875 * Set the .PARSEDIR and .PARSEFILE variables to the dirname and 1876 * basename of the given filename 1877 * 1878 * Results: 1879 * None 1880 * 1881 * Side Effects: 1882 * The .PARSEDIR and .PARSEFILE variables are overwritten by the 1883 * dirname and basename of the given filename. 1884 *--------------------------------------------------------------------- 1885 */ 1886 static void 1887 ParseSetParseFile(fname) 1888 char *fname; 1889 { 1890 char *slash; 1891 1892 slash = strrchr(fname, '/'); 1893 if (slash == 0) { 1894 Var_Set(".PARSEDIR", ".", VAR_GLOBAL, 0); 1895 Var_Set(".PARSEFILE", fname, VAR_GLOBAL, 0); 1896 } else { 1897 *slash = '\0'; 1898 Var_Set(".PARSEDIR", fname, VAR_GLOBAL, 0); 1899 Var_Set(".PARSEFILE", slash+1, VAR_GLOBAL, 0); 1900 *slash = '/'; 1901 } 1902 } 1903 1904 1905 /*- 1906 *--------------------------------------------------------------------- 1907 * Parse_FromString -- 1908 * Start Parsing from the given string 1909 * 1910 * Results: 1911 * None 1912 * 1913 * Side Effects: 1914 * A structure is added to the includes Lst and readProc, lineno, 1915 * fname and curFILE are altered for the new file 1916 *--------------------------------------------------------------------- 1917 */ 1918 void 1919 Parse_FromString(str) 1920 char *str; 1921 { 1922 IFile *oldFile; /* state associated with this file */ 1923 1924 if (DEBUG(FOR)) 1925 (void) fprintf(stderr, "%s\n----\n", str); 1926 1927 oldFile = (IFile *) emalloc (sizeof (IFile)); 1928 oldFile->lineno = lineno; 1929 oldFile->fname = fname; 1930 oldFile->F = curFILE; 1931 oldFile->p = curPTR; 1932 1933 (void) Lst_AtFront (includes, (ClientData)oldFile); 1934 1935 curFILE = NULL; 1936 curPTR = (PTR *) emalloc (sizeof (PTR)); 1937 curPTR->str = curPTR->ptr = str; 1938 lineno = 0; 1939 fname = estrdup(fname); 1940 } 1941 1942 1943 #ifdef SYSVINCLUDE 1944 /*- 1945 *--------------------------------------------------------------------- 1946 * ParseTraditionalInclude -- 1947 * Push to another file. 1948 * 1949 * The input is the current line. The file name(s) are 1950 * following the "include". 1951 * 1952 * Results: 1953 * None 1954 * 1955 * Side Effects: 1956 * A structure is added to the includes Lst and readProc, lineno, 1957 * fname and curFILE are altered for the new file 1958 *--------------------------------------------------------------------- 1959 */ 1960 static void 1961 ParseTraditionalInclude (line) 1962 char *line; 1963 { 1964 char *fullname; /* full pathname of file */ 1965 IFile *oldFile; /* state associated with current file */ 1966 char *cp; /* current position in file spec */ 1967 char *prefEnd; 1968 int done = 0; 1969 int silent = (line[0] != 'i') ? 1 : 0; 1970 char *file = &line[silent + 7]; 1971 char *cfname = fname; 1972 size_t clineno = lineno; 1973 1974 1975 /* 1976 * Skip over whitespace 1977 */ 1978 while (isspace((unsigned char)*file)) 1979 file++; 1980 1981 if (*file == '\0') { 1982 Parse_Error (PARSE_FATAL, 1983 "Filename missing from \"include\""); 1984 return; 1985 } 1986 1987 for (; !done; file = cp + 1) { 1988 /* 1989 * Skip to end of line or next whitespace 1990 */ 1991 for (cp = file; *cp && !isspace((unsigned char) *cp); cp++) 1992 continue; 1993 1994 if (*cp) 1995 *cp = '\0'; 1996 else 1997 done = 1; 1998 1999 /* 2000 * Substitute for any variables in the file name before trying to 2001 * find the thing. 2002 */ 2003 file = Var_Subst(NULL, file, VAR_CMD, FALSE); 2004 2005 /* 2006 * Now we know the file's name, we attempt to find the durn thing. 2007 * A return of NULL indicates the file don't exist. 2008 * 2009 * Include files are first searched for relative to the including 2010 * file's location. We don't want to cd there, of course, so we 2011 * just tack on the old file's leading path components and call 2012 * Dir_FindFile to see if we can locate the beast. 2013 * XXX - this *does* search in the current directory, right? 2014 */ 2015 2016 prefEnd = strrchr(cfname, '/'); 2017 if (prefEnd != NULL) { 2018 char *newName; 2019 2020 *prefEnd = '\0'; 2021 newName = str_concat(cfname, file, STR_ADDSLASH); 2022 fullname = Dir_FindFile(newName, parseIncPath); 2023 if (fullname == NULL) { 2024 fullname = Dir_FindFile(newName, dirSearchPath); 2025 } 2026 free (newName); 2027 *prefEnd = '/'; 2028 } else { 2029 fullname = NULL; 2030 } 2031 2032 if (fullname == NULL) { 2033 /* 2034 * System makefile or makefile wasn't found in same directory as 2035 * included makefile. Search for it first on the -I search path, 2036 * then on the .PATH search path, if not found in a 2037 * -I directory. XXX: Suffix specific? 2038 */ 2039 fullname = Dir_FindFile(file, parseIncPath); 2040 if (fullname == NULL) { 2041 fullname = Dir_FindFile(file, dirSearchPath); 2042 } 2043 } 2044 2045 if (fullname == NULL) { 2046 /* 2047 * Still haven't found the makefile. Look for it on the system 2048 * path as a last resort. 2049 */ 2050 fullname = Dir_FindFile(file, sysIncPath); 2051 } 2052 2053 if (fullname == NULL) { 2054 if (!silent) 2055 ParseErrorInternal(cfname, clineno, PARSE_FATAL, 2056 "Could not find %s", file); 2057 free(file); 2058 continue; 2059 } 2060 2061 free(file); 2062 2063 /* 2064 * Once we find the absolute path to the file, we get to save all 2065 * the state from the current file before we can start reading this 2066 * include file. The state is stored in an IFile structure which 2067 * is placed on a list with other IFile structures. The list makes 2068 * a very nice stack to track how we got here... 2069 */ 2070 oldFile = (IFile *) emalloc(sizeof(IFile)); 2071 oldFile->fname = fname; 2072 2073 oldFile->F = curFILE; 2074 oldFile->p = curPTR; 2075 oldFile->lineno = lineno; 2076 2077 (void) Lst_AtFront(includes, (ClientData)oldFile); 2078 2079 /* 2080 * Once the previous state has been saved, we can get down to 2081 * reading the new file. We set up the name of the file to be the 2082 * absolute name of the include file so error messages refer to the 2083 * right place. Naturally enough, we start reading at line number 0. 2084 */ 2085 fname = fullname; 2086 lineno = 0; 2087 2088 curFILE = fopen(fullname, "r"); 2089 curPTR = NULL; 2090 if (curFILE == NULL) { 2091 if (!silent) 2092 ParseErrorInternal(cfname, clineno, PARSE_FATAL, 2093 "Cannot open %s", fullname); 2094 /* 2095 * Pop to previous file 2096 */ 2097 (void) ParseEOF(1); 2098 } 2099 } 2100 } 2101 #endif 2102 2103 /*- 2104 *--------------------------------------------------------------------- 2105 * ParseEOF -- 2106 * Called when EOF is reached in the current file. If we were reading 2107 * an include file, the includes stack is popped and things set up 2108 * to go back to reading the previous file at the previous location. 2109 * 2110 * Results: 2111 * CONTINUE if there's more to do. DONE if not. 2112 * 2113 * Side Effects: 2114 * The old curFILE, is closed. The includes list is shortened. 2115 * lineno, curFILE, and fname are changed if CONTINUE is returned. 2116 *--------------------------------------------------------------------- 2117 */ 2118 static int 2119 ParseEOF (opened) 2120 int opened; 2121 { 2122 IFile *ifile; /* the state on the top of the includes stack */ 2123 2124 if (Lst_IsEmpty (includes)) { 2125 Var_Delete(".PARSEDIR", VAR_GLOBAL); 2126 Var_Delete(".PARSEFILE", VAR_GLOBAL); 2127 return (DONE); 2128 } 2129 2130 ifile = (IFile *) Lst_DeQueue (includes); 2131 free ((Address) fname); 2132 fname = ifile->fname; 2133 lineno = ifile->lineno; 2134 if (opened && curFILE) 2135 (void) fclose (curFILE); 2136 if (curPTR) { 2137 free((Address) curPTR->str); 2138 free((Address) curPTR); 2139 } 2140 curFILE = ifile->F; 2141 curPTR = ifile->p; 2142 free ((Address)ifile); 2143 2144 /* pop the PARSEDIR/PARSEFILE variables */ 2145 ParseSetParseFile(fname); 2146 return (CONTINUE); 2147 } 2148 2149 /*- 2150 *--------------------------------------------------------------------- 2151 * ParseReadc -- 2152 * Read a character from the current file 2153 * 2154 * Results: 2155 * The character that was read 2156 * 2157 * Side Effects: 2158 *--------------------------------------------------------------------- 2159 */ 2160 static __inline int 2161 ParseReadc() 2162 { 2163 if (curFILE) 2164 return fgetc(curFILE); 2165 2166 if (curPTR && *curPTR->ptr) 2167 return *curPTR->ptr++; 2168 return EOF; 2169 } 2170 2171 2172 /*- 2173 *--------------------------------------------------------------------- 2174 * ParseUnreadc -- 2175 * Put back a character to the current file 2176 * 2177 * Results: 2178 * None. 2179 * 2180 * Side Effects: 2181 *--------------------------------------------------------------------- 2182 */ 2183 static void 2184 ParseUnreadc(c) 2185 int c; 2186 { 2187 if (curFILE) { 2188 ungetc(c, curFILE); 2189 return; 2190 } 2191 if (curPTR) { 2192 *--(curPTR->ptr) = c; 2193 return; 2194 } 2195 } 2196 2197 2198 /* ParseSkipLine(): 2199 * Grab the next line 2200 */ 2201 static char * 2202 ParseSkipLine(skip) 2203 int skip; /* Skip lines that don't start with . */ 2204 { 2205 char *line; 2206 int c, lastc, lineLength = 0; 2207 Buffer buf; 2208 2209 buf = Buf_Init(MAKE_BSIZE); 2210 2211 do { 2212 Buf_Discard(buf, lineLength); 2213 lastc = '\0'; 2214 2215 while (((c = ParseReadc()) != '\n' || lastc == '\\') 2216 && c != EOF) { 2217 if (c == '\n') { 2218 Buf_ReplaceLastByte(buf, (Byte)' '); 2219 lineno++; 2220 2221 while ((c = ParseReadc()) == ' ' || c == '\t'); 2222 2223 if (c == EOF) 2224 break; 2225 } 2226 2227 Buf_AddByte(buf, (Byte)c); 2228 lastc = c; 2229 } 2230 2231 if (c == EOF) { 2232 Parse_Error(PARSE_FATAL, "Unclosed conditional/for loop"); 2233 Buf_Destroy(buf, TRUE); 2234 return((char *)NULL); 2235 } 2236 2237 lineno++; 2238 Buf_AddByte(buf, (Byte)'\0'); 2239 line = (char *)Buf_GetAll(buf, &lineLength); 2240 } while (skip == 1 && line[0] != '.'); 2241 2242 Buf_Destroy(buf, FALSE); 2243 return line; 2244 } 2245 2246 2247 /*- 2248 *--------------------------------------------------------------------- 2249 * ParseReadLine -- 2250 * Read an entire line from the input file. Called only by Parse_File. 2251 * To facilitate escaped newlines and what have you, a character is 2252 * buffered in 'lastc', which is '\0' when no characters have been 2253 * read. When we break out of the loop, c holds the terminating 2254 * character and lastc holds a character that should be added to 2255 * the line (unless we don't read anything but a terminator). 2256 * 2257 * Results: 2258 * A line w/o its newline 2259 * 2260 * Side Effects: 2261 * Only those associated with reading a character 2262 *--------------------------------------------------------------------- 2263 */ 2264 static char * 2265 ParseReadLine () 2266 { 2267 Buffer buf; /* Buffer for current line */ 2268 register int c; /* the current character */ 2269 register int lastc; /* The most-recent character */ 2270 Boolean semiNL; /* treat semi-colons as newlines */ 2271 Boolean ignDepOp; /* TRUE if should ignore dependency operators 2272 * for the purposes of setting semiNL */ 2273 Boolean ignComment; /* TRUE if should ignore comments (in a 2274 * shell command */ 2275 char *line; /* Result */ 2276 char *ep; /* to strip trailing blanks */ 2277 int lineLength; /* Length of result */ 2278 2279 semiNL = FALSE; 2280 ignDepOp = FALSE; 2281 ignComment = FALSE; 2282 2283 /* 2284 * Handle special-characters at the beginning of the line. Either a 2285 * leading tab (shell command) or pound-sign (possible conditional) 2286 * forces us to ignore comments and dependency operators and treat 2287 * semi-colons as semi-colons (by leaving semiNL FALSE). This also 2288 * discards completely blank lines. 2289 */ 2290 for (;;) { 2291 c = ParseReadc(); 2292 2293 if (c == '\t') { 2294 ignComment = ignDepOp = TRUE; 2295 break; 2296 } else if (c == '\n') { 2297 lineno++; 2298 } else if (c == '#') { 2299 ParseUnreadc(c); 2300 break; 2301 } else { 2302 /* 2303 * Anything else breaks out without doing anything 2304 */ 2305 break; 2306 } 2307 } 2308 2309 if (c != EOF) { 2310 lastc = c; 2311 buf = Buf_Init(MAKE_BSIZE); 2312 2313 while (((c = ParseReadc ()) != '\n' || (lastc == '\\')) && 2314 (c != EOF)) 2315 { 2316 test_char: 2317 switch(c) { 2318 case '\n': 2319 /* 2320 * Escaped newline: read characters until a non-space or an 2321 * unescaped newline and replace them all by a single space. 2322 * This is done by storing the space over the backslash and 2323 * dropping through with the next nonspace. If it is a 2324 * semi-colon and semiNL is TRUE, it will be recognized as a 2325 * newline in the code below this... 2326 */ 2327 lineno++; 2328 lastc = ' '; 2329 while ((c = ParseReadc ()) == ' ' || c == '\t') { 2330 continue; 2331 } 2332 if (c == EOF || c == '\n') { 2333 goto line_read; 2334 } else { 2335 /* 2336 * Check for comments, semiNL's, etc. -- easier than 2337 * ParseUnreadc(c); continue; 2338 */ 2339 goto test_char; 2340 } 2341 /*NOTREACHED*/ 2342 break; 2343 2344 case ';': 2345 /* 2346 * Semi-colon: Need to see if it should be interpreted as a 2347 * newline 2348 */ 2349 if (semiNL) { 2350 /* 2351 * To make sure the command that may be following this 2352 * semi-colon begins with a tab, we push one back into the 2353 * input stream. This will overwrite the semi-colon in the 2354 * buffer. If there is no command following, this does no 2355 * harm, since the newline remains in the buffer and the 2356 * whole line is ignored. 2357 */ 2358 ParseUnreadc('\t'); 2359 goto line_read; 2360 } 2361 break; 2362 case '=': 2363 if (!semiNL) { 2364 /* 2365 * Haven't seen a dependency operator before this, so this 2366 * must be a variable assignment -- don't pay attention to 2367 * dependency operators after this. 2368 */ 2369 ignDepOp = TRUE; 2370 } else if (lastc == ':' || lastc == '!') { 2371 /* 2372 * Well, we've seen a dependency operator already, but it 2373 * was the previous character, so this is really just an 2374 * expanded variable assignment. Revert semi-colons to 2375 * being just semi-colons again and ignore any more 2376 * dependency operators. 2377 * 2378 * XXX: Note that a line like "foo : a:=b" will blow up, 2379 * but who'd write a line like that anyway? 2380 */ 2381 ignDepOp = TRUE; semiNL = FALSE; 2382 } 2383 break; 2384 case '#': 2385 if (!ignComment) { 2386 if ( 2387 #if 0 2388 compatMake && 2389 #endif 2390 (lastc != '\\')) { 2391 /* 2392 * If the character is a hash mark and it isn't escaped 2393 * (or we're being compatible), the thing is a comment. 2394 * Skip to the end of the line. 2395 */ 2396 do { 2397 c = ParseReadc(); 2398 } while ((c != '\n') && (c != EOF)); 2399 goto line_read; 2400 } else { 2401 /* 2402 * Don't add the backslash. Just let the # get copied 2403 * over. 2404 */ 2405 lastc = c; 2406 continue; 2407 } 2408 } 2409 break; 2410 case ':': 2411 case '!': 2412 if (!ignDepOp && (c == ':' || c == '!')) { 2413 /* 2414 * A semi-colon is recognized as a newline only on 2415 * dependency lines. Dependency lines are lines with a 2416 * colon or an exclamation point. Ergo... 2417 */ 2418 semiNL = TRUE; 2419 } 2420 break; 2421 } 2422 /* 2423 * Copy in the previous character and save this one in lastc. 2424 */ 2425 Buf_AddByte (buf, (Byte)lastc); 2426 lastc = c; 2427 2428 } 2429 line_read: 2430 lineno++; 2431 2432 if (lastc != '\0') { 2433 Buf_AddByte (buf, (Byte)lastc); 2434 } 2435 Buf_AddByte (buf, (Byte)'\0'); 2436 line = (char *)Buf_GetAll (buf, &lineLength); 2437 Buf_Destroy (buf, FALSE); 2438 2439 /* 2440 * Strip trailing blanks and tabs from the line. 2441 * Do not strip a blank or tab that is preceded by 2442 * a '\' 2443 */ 2444 ep = line; 2445 while (*ep) 2446 ++ep; 2447 while (ep > line + 1 && (ep[-1] == ' ' || ep[-1] == '\t')) { 2448 if (ep > line + 1 && ep[-2] == '\\') 2449 break; 2450 --ep; 2451 } 2452 *ep = 0; 2453 2454 if (line[0] == '.') { 2455 /* 2456 * The line might be a conditional. Ask the conditional module 2457 * about it and act accordingly 2458 */ 2459 switch (Cond_Eval (line)) { 2460 case COND_SKIP: 2461 /* 2462 * Skip to next conditional that evaluates to COND_PARSE. 2463 */ 2464 do { 2465 free (line); 2466 line = ParseSkipLine(1); 2467 } while (line && Cond_Eval(line) != COND_PARSE); 2468 if (line == NULL) 2469 break; 2470 /*FALLTHRU*/ 2471 case COND_PARSE: 2472 free ((Address) line); 2473 line = ParseReadLine(); 2474 break; 2475 case COND_INVALID: 2476 if (For_Eval(line)) { 2477 int ok; 2478 free(line); 2479 do { 2480 /* 2481 * Skip after the matching end 2482 */ 2483 line = ParseSkipLine(0); 2484 if (line == NULL) { 2485 Parse_Error (PARSE_FATAL, 2486 "Unexpected end of file in for loop.\n"); 2487 break; 2488 } 2489 ok = For_Eval(line); 2490 free(line); 2491 } 2492 while (ok); 2493 if (line != NULL) 2494 For_Run(); 2495 line = ParseReadLine(); 2496 } 2497 break; 2498 } 2499 } 2500 return (line); 2501 2502 } else { 2503 /* 2504 * Hit end-of-file, so return a NULL line to indicate this. 2505 */ 2506 return((char *)NULL); 2507 } 2508 } 2509 2510 /*- 2511 *----------------------------------------------------------------------- 2512 * ParseFinishLine -- 2513 * Handle the end of a dependency group. 2514 * 2515 * Results: 2516 * Nothing. 2517 * 2518 * Side Effects: 2519 * inLine set FALSE. 'targets' list destroyed. 2520 * 2521 *----------------------------------------------------------------------- 2522 */ 2523 static void 2524 ParseFinishLine() 2525 { 2526 if (inLine) { 2527 Lst_ForEach(targets, Suff_EndTransform, (ClientData)NULL); 2528 Lst_Destroy (targets, ParseHasCommands); 2529 targets = NULL; 2530 inLine = FALSE; 2531 } 2532 } 2533 2534 2535 /*- 2536 *--------------------------------------------------------------------- 2537 * Parse_File -- 2538 * Parse a file into its component parts, incorporating it into the 2539 * current dependency graph. This is the main function and controls 2540 * almost every other function in this module 2541 * 2542 * Results: 2543 * None 2544 * 2545 * Side Effects: 2546 * Loads. Nodes are added to the list of all targets, nodes and links 2547 * are added to the dependency graph. etc. etc. etc. 2548 *--------------------------------------------------------------------- 2549 */ 2550 void 2551 Parse_File(name, stream) 2552 char *name; /* the name of the file being read */ 2553 FILE * stream; /* Stream open to makefile to parse */ 2554 { 2555 register char *cp, /* pointer into the line */ 2556 *line; /* the line we're working on */ 2557 2558 inLine = FALSE; 2559 fname = name; 2560 curFILE = stream; 2561 lineno = 0; 2562 fatals = 0; 2563 2564 ParseSetParseFile(fname); 2565 2566 do { 2567 while ((line = ParseReadLine ()) != NULL) { 2568 if (*line == '.') { 2569 /* 2570 * Lines that begin with the special character are either 2571 * include or undef directives. 2572 */ 2573 for (cp = line + 1; isspace ((unsigned char)*cp); cp++) { 2574 continue; 2575 } 2576 if (strncmp(cp, "include", 7) == 0 || 2577 ((cp[0] == 's' || cp[0] == '-') && 2578 strncmp(&cp[1], "include", 7) == 0)) { 2579 ParseDoInclude (cp); 2580 goto nextLine; 2581 } else if (strncmp(cp, "undef", 5) == 0) { 2582 char *cp2; 2583 for (cp += 5; isspace((unsigned char) *cp); cp++) { 2584 continue; 2585 } 2586 2587 for (cp2 = cp; !isspace((unsigned char) *cp2) && 2588 (*cp2 != '\0'); cp2++) { 2589 continue; 2590 } 2591 2592 *cp2 = '\0'; 2593 2594 Var_Delete(cp, VAR_GLOBAL); 2595 goto nextLine; 2596 } 2597 } 2598 if (*line == '#') { 2599 /* If we're this far, the line must be a comment. */ 2600 goto nextLine; 2601 } 2602 2603 if (*line == '\t') { 2604 /* 2605 * If a line starts with a tab, it can only hope to be 2606 * a creation command. 2607 */ 2608 #ifndef POSIX 2609 shellCommand: 2610 #endif 2611 for (cp = line + 1; isspace ((unsigned char)*cp); cp++) { 2612 continue; 2613 } 2614 if (*cp) { 2615 if (inLine) { 2616 /* 2617 * So long as it's not a blank line and we're actually 2618 * in a dependency spec, add the command to the list of 2619 * commands of all targets in the dependency spec 2620 */ 2621 Lst_ForEach (targets, ParseAddCmd, cp); 2622 #ifdef CLEANUP 2623 Lst_AtEnd(targCmds, (ClientData) line); 2624 #endif 2625 continue; 2626 } else { 2627 Parse_Error (PARSE_FATAL, 2628 "Unassociated shell command \"%s\"", 2629 cp); 2630 } 2631 } 2632 #ifdef SYSVINCLUDE 2633 } else if (((strncmp(line, "include", 7) == 0 && 2634 isspace((unsigned char) line[7])) || 2635 ((line[0] == 's' || line[0] == '-') && 2636 strncmp(&line[1], "include", 7) == 0 && 2637 isspace((unsigned char) line[8]))) && 2638 strchr(line, ':') == NULL) { 2639 /* 2640 * It's an S3/S5-style "include". 2641 */ 2642 ParseTraditionalInclude (line); 2643 goto nextLine; 2644 #endif 2645 } else if (Parse_IsVar (line)) { 2646 ParseFinishLine(); 2647 Parse_DoVar (line, VAR_GLOBAL); 2648 } else { 2649 /* 2650 * We now know it's a dependency line so it needs to have all 2651 * variables expanded before being parsed. Tell the variable 2652 * module to complain if some variable is undefined... 2653 * To make life easier on novices, if the line is indented we 2654 * first make sure the line has a dependency operator in it. 2655 * If it doesn't have an operator and we're in a dependency 2656 * line's script, we assume it's actually a shell command 2657 * and add it to the current list of targets. 2658 */ 2659 #ifndef POSIX 2660 Boolean nonSpace = FALSE; 2661 #endif 2662 2663 cp = line; 2664 if (isspace((unsigned char) line[0])) { 2665 while ((*cp != '\0') && isspace((unsigned char) *cp)) { 2666 cp++; 2667 } 2668 if (*cp == '\0') { 2669 goto nextLine; 2670 } 2671 #ifndef POSIX 2672 while ((*cp != ':') && (*cp != '!') && (*cp != '\0')) { 2673 nonSpace = TRUE; 2674 cp++; 2675 } 2676 #endif 2677 } 2678 2679 #ifndef POSIX 2680 if (*cp == '\0') { 2681 if (inLine) { 2682 Parse_Error (PARSE_WARNING, 2683 "Shell command needs a leading tab"); 2684 goto shellCommand; 2685 } else if (nonSpace) { 2686 Parse_Error (PARSE_FATAL, "Missing operator"); 2687 } 2688 } else { 2689 #endif 2690 ParseFinishLine(); 2691 2692 cp = Var_Subst (NULL, line, VAR_CMD, TRUE); 2693 free (line); 2694 line = cp; 2695 2696 /* 2697 * Need a non-circular list for the target nodes 2698 */ 2699 if (targets) 2700 Lst_Destroy(targets, NOFREE); 2701 2702 targets = Lst_Init (FALSE); 2703 inLine = TRUE; 2704 2705 ParseDoDependency (line); 2706 #ifndef POSIX 2707 } 2708 #endif 2709 } 2710 2711 nextLine: 2712 2713 free (line); 2714 } 2715 /* 2716 * Reached EOF, but it may be just EOF of an include file... 2717 */ 2718 } while (ParseEOF(1) == CONTINUE); 2719 2720 /* 2721 * Make sure conditionals are clean 2722 */ 2723 Cond_End(); 2724 2725 if (fatals) { 2726 (void)fprintf(stderr, 2727 "%s: Fatal errors encountered -- cannot continue\n", 2728 progname); 2729 PrintOnError(NULL); 2730 exit (1); 2731 } 2732 } 2733 2734 /*- 2735 *--------------------------------------------------------------------- 2736 * Parse_Init -- 2737 * initialize the parsing module 2738 * 2739 * Results: 2740 * none 2741 * 2742 * Side Effects: 2743 * the parseIncPath list is initialized... 2744 *--------------------------------------------------------------------- 2745 */ 2746 void 2747 Parse_Init () 2748 { 2749 mainNode = NILGNODE; 2750 parseIncPath = Lst_Init (FALSE); 2751 sysIncPath = Lst_Init (FALSE); 2752 includes = Lst_Init (FALSE); 2753 #ifdef CLEANUP 2754 targCmds = Lst_Init (FALSE); 2755 #endif 2756 } 2757 2758 void 2759 Parse_End() 2760 { 2761 #ifdef CLEANUP 2762 Lst_Destroy(targCmds, (void (*) __P((ClientData))) free); 2763 if (targets) 2764 Lst_Destroy(targets, NOFREE); 2765 Lst_Destroy(sysIncPath, Dir_Destroy); 2766 Lst_Destroy(parseIncPath, Dir_Destroy); 2767 Lst_Destroy(includes, NOFREE); /* Should be empty now */ 2768 #endif 2769 } 2770 2771 2772 /*- 2773 *----------------------------------------------------------------------- 2774 * Parse_MainName -- 2775 * Return a Lst of the main target to create for main()'s sake. If 2776 * no such target exists, we Punt with an obnoxious error message. 2777 * 2778 * Results: 2779 * A Lst of the single node to create. 2780 * 2781 * Side Effects: 2782 * None. 2783 * 2784 *----------------------------------------------------------------------- 2785 */ 2786 Lst 2787 Parse_MainName() 2788 { 2789 Lst mainList; /* result list */ 2790 2791 mainList = Lst_Init (FALSE); 2792 2793 if (mainNode == NILGNODE) { 2794 Punt ("no target to make."); 2795 /*NOTREACHED*/ 2796 } else if (mainNode->type & OP_DOUBLEDEP) { 2797 (void) Lst_AtEnd (mainList, (ClientData)mainNode); 2798 Lst_Concat(mainList, mainNode->cohorts, LST_CONCNEW); 2799 } 2800 else 2801 (void) Lst_AtEnd (mainList, (ClientData)mainNode); 2802 return (mainList); 2803 } 2804 2805 /*- 2806 *----------------------------------------------------------------------- 2807 * ParseMark -- 2808 * Add the filename and lineno to the GNode so that we remember 2809 * where it was first defined. 2810 * 2811 * Side Effects: 2812 * None. 2813 * 2814 *----------------------------------------------------------------------- 2815 */ 2816 static void 2817 ParseMark(gn) 2818 GNode *gn; 2819 { 2820 gn->fname = strdup(fname); 2821 gn->lineno = lineno; 2822 } 2823