1 /* $NetBSD: parse.c,v 1.62 2001/01/14 20:54:16 mycroft 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 1.62 2001/01/14 20:54:16 mycroft 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 1.62 2001/01/14 20:54:16 mycroft 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 if (*cfname != '/') { 346 char *cp, *dir; 347 348 /* 349 * Nothing is more anoying than not knowing which Makefile 350 * is the culprit. 351 */ 352 dir = Var_Value(".PARSEDIR", VAR_GLOBAL, &cp); 353 if (*dir == '\0' || 354 (*dir == '.' && dir[1] == '\0')) 355 dir = Var_Value(".CURDIR", VAR_GLOBAL, &cp); 356 357 (void)fprintf(stderr, "\"%s/%s\", line %d: ", dir, cfname, (int) clineno); 358 } else 359 (void)fprintf(stderr, "\"%s\", line %d: ", cfname, (int) clineno); 360 if (type == PARSE_WARNING) 361 (void)fprintf(stderr, "warning: "); 362 (void)vfprintf(stderr, fmt, ap); 363 va_end(ap); 364 (void)fprintf(stderr, "\n"); 365 (void)fflush(stderr); 366 if (type == PARSE_FATAL || parseWarnFatal) 367 fatals += 1; 368 if (parseWarnFatal && !fatal_warning_error_printed) { 369 Error("parsing warnings being treated as errors"); 370 fatal_warning_error_printed = TRUE; 371 } 372 } 373 374 /*- 375 * ParseErrorInternal -- 376 * Error function 377 * 378 * Results: 379 * None 380 * 381 * Side Effects: 382 * None 383 */ 384 /* VARARGS */ 385 static void 386 #ifdef __STDC__ 387 ParseErrorInternal(char *cfname, size_t clineno, int type, char *fmt, ...) 388 #else 389 ParseErrorInternal(va_alist) 390 va_dcl 391 #endif 392 { 393 va_list ap; 394 #ifdef __STDC__ 395 va_start(ap, fmt); 396 #else 397 int type; /* Error type (PARSE_WARNING, PARSE_FATAL) */ 398 char *fmt; 399 char *cfname; 400 size_t clineno; 401 402 va_start(ap); 403 cfname = va_arg(ap, char *); 404 clineno = va_arg(ap, size_t); 405 type = va_arg(ap, int); 406 fmt = va_arg(ap, char *); 407 #endif 408 409 ParseVErrorInternal(cfname, clineno, type, fmt, ap); 410 va_end(ap); 411 } 412 413 /*- 414 * Parse_Error -- 415 * External interface to ParseErrorInternal; uses the default filename 416 * Line number. 417 * 418 * Results: 419 * None 420 * 421 * Side Effects: 422 * None 423 */ 424 /* VARARGS */ 425 void 426 #ifdef __STDC__ 427 Parse_Error(int type, char *fmt, ...) 428 #else 429 Parse_Error(va_alist) 430 va_dcl 431 #endif 432 { 433 va_list ap; 434 #ifdef __STDC__ 435 va_start(ap, fmt); 436 #else 437 int type; /* Error type (PARSE_WARNING, PARSE_FATAL) */ 438 char *fmt; 439 440 va_start(ap); 441 type = va_arg(ap, int); 442 fmt = va_arg(ap, char *); 443 #endif 444 ParseVErrorInternal(fname, lineno, type, fmt, ap); 445 va_end(ap); 446 } 447 448 /*- 449 *--------------------------------------------------------------------- 450 * ParseLinkSrc -- 451 * Link the parent node to its new child. Used in a Lst_ForEach by 452 * ParseDoDependency. If the specType isn't 'Not', the parent 453 * isn't linked as a parent of the child. 454 * 455 * Results: 456 * Always = 0 457 * 458 * Side Effects: 459 * New elements are added to the parents list of cgn and the 460 * children list of cgn. the unmade field of pgn is updated 461 * to reflect the additional child. 462 *--------------------------------------------------------------------- 463 */ 464 static int 465 ParseLinkSrc (pgnp, cgnp) 466 ClientData pgnp; /* The parent node */ 467 ClientData cgnp; /* The child node */ 468 { 469 GNode *pgn = (GNode *) pgnp; 470 GNode *cgn = (GNode *) cgnp; 471 472 if ((pgn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (pgn->cohorts)) 473 pgn = (GNode *) Lst_Datum (Lst_Last (pgn->cohorts)); 474 (void)Lst_AtEnd (pgn->children, (ClientData)cgn); 475 if (specType == Not) 476 (void)Lst_AtEnd (cgn->parents, (ClientData)pgn); 477 pgn->unmade += 1; 478 return (0); 479 } 480 481 /*- 482 *--------------------------------------------------------------------- 483 * ParseDoOp -- 484 * Apply the parsed operator to the given target node. Used in a 485 * Lst_ForEach call by ParseDoDependency once all targets have 486 * been found and their operator parsed. If the previous and new 487 * operators are incompatible, a major error is taken. 488 * 489 * Results: 490 * Always 0 491 * 492 * Side Effects: 493 * The type field of the node is altered to reflect any new bits in 494 * the op. 495 *--------------------------------------------------------------------- 496 */ 497 static int 498 ParseDoOp (gnp, opp) 499 ClientData gnp; /* The node to which the operator is to be 500 * applied */ 501 ClientData opp; /* The operator to apply */ 502 { 503 GNode *gn = (GNode *) gnp; 504 int op = *(int *) opp; 505 /* 506 * If the dependency mask of the operator and the node don't match and 507 * the node has actually had an operator applied to it before, and 508 * the operator actually has some dependency information in it, complain. 509 */ 510 if (((op & OP_OPMASK) != (gn->type & OP_OPMASK)) && 511 !OP_NOP(gn->type) && !OP_NOP(op)) 512 { 513 Parse_Error (PARSE_FATAL, "Inconsistent operator for %s", gn->name); 514 return (1); 515 } 516 517 if ((op == OP_DOUBLEDEP) && ((gn->type & OP_OPMASK) == OP_DOUBLEDEP)) { 518 /* 519 * If the node was the object of a :: operator, we need to create a 520 * new instance of it for the children and commands on this dependency 521 * line. The new instance is placed on the 'cohorts' list of the 522 * initial one (note the initial one is not on its own cohorts list) 523 * and the new instance is linked to all parents of the initial 524 * instance. 525 */ 526 register GNode *cohort; 527 528 /* 529 * Propagate copied bits to the initial node. They'll be propagated 530 * back to the rest of the cohorts later. 531 */ 532 gn->type |= op & ~OP_OPMASK; 533 534 cohort = Targ_NewGN(gn->name); 535 /* 536 * Make the cohort invisible as well to avoid duplicating it into 537 * other variables. True, parents of this target won't tend to do 538 * anything with their local variables, but better safe than 539 * sorry. (I think this is pointless now, since the relevant list 540 * traversals will no longer see this node anyway. -mycroft) 541 */ 542 cohort->type = op | OP_INVISIBLE; 543 (void)Lst_AtEnd(gn->cohorts, (ClientData)cohort); 544 } else { 545 /* 546 * We don't want to nuke any previous flags (whatever they were) so we 547 * just OR the new operator into the old 548 */ 549 gn->type |= op; 550 } 551 552 return (0); 553 } 554 555 /*- 556 *--------------------------------------------------------------------- 557 * ParseAddDep -- 558 * Check if the pair of GNodes given needs to be synchronized. 559 * This has to be when two nodes are on different sides of a 560 * .WAIT directive. 561 * 562 * Results: 563 * Returns 1 if the two targets need to be ordered, 0 otherwise. 564 * If it returns 1, the search can stop 565 * 566 * Side Effects: 567 * A dependency can be added between the two nodes. 568 * 569 *--------------------------------------------------------------------- 570 */ 571 static int 572 ParseAddDep(pp, sp) 573 ClientData pp; 574 ClientData sp; 575 { 576 GNode *p = (GNode *) pp; 577 GNode *s = (GNode *) sp; 578 579 if (p->order < s->order) { 580 /* 581 * XXX: This can cause loops, and loops can cause unmade targets, 582 * but checking is tedious, and the debugging output can show the 583 * problem 584 */ 585 (void)Lst_AtEnd(p->successors, (ClientData)s); 586 (void)Lst_AtEnd(s->preds, (ClientData)p); 587 return 0; 588 } 589 else 590 return 1; 591 } 592 593 594 /*- 595 *--------------------------------------------------------------------- 596 * ParseDoSrc -- 597 * Given the name of a source, figure out if it is an attribute 598 * and apply it to the targets if it is. Else decide if there is 599 * some attribute which should be applied *to* the source because 600 * of some special target and apply it if so. Otherwise, make the 601 * source be a child of the targets in the list 'targets' 602 * 603 * Results: 604 * None 605 * 606 * Side Effects: 607 * Operator bits may be added to the list of targets or to the source. 608 * The targets may have a new source added to their lists of children. 609 *--------------------------------------------------------------------- 610 */ 611 static void 612 ParseDoSrc (tOp, src, allsrc) 613 int tOp; /* operator (if any) from special targets */ 614 char *src; /* name of the source to handle */ 615 Lst allsrc; /* List of all sources to wait for */ 616 617 { 618 GNode *gn = NULL; 619 620 if (*src == '.' && isupper ((unsigned char)src[1])) { 621 int keywd = ParseFindKeyword(src); 622 if (keywd != -1) { 623 int op = parseKeywords[keywd].op; 624 if (op != 0) { 625 Lst_ForEach (targets, ParseDoOp, (ClientData)&op); 626 return; 627 } 628 if (parseKeywords[keywd].spec == Wait) { 629 waiting++; 630 return; 631 } 632 } 633 } 634 635 switch (specType) { 636 case Main: 637 /* 638 * If we have noted the existence of a .MAIN, it means we need 639 * to add the sources of said target to the list of things 640 * to create. The string 'src' is likely to be free, so we 641 * must make a new copy of it. Note that this will only be 642 * invoked if the user didn't specify a target on the command 643 * line. This is to allow #ifmake's to succeed, or something... 644 */ 645 (void) Lst_AtEnd (create, (ClientData)estrdup(src)); 646 /* 647 * Add the name to the .TARGETS variable as well, so the user cna 648 * employ that, if desired. 649 */ 650 Var_Append(".TARGETS", src, VAR_GLOBAL); 651 return; 652 653 case Order: 654 /* 655 * Create proper predecessor/successor links between the previous 656 * source and the current one. 657 */ 658 gn = Targ_FindNode(src, TARG_CREATE); 659 if (predecessor != NILGNODE) { 660 (void)Lst_AtEnd(predecessor->successors, (ClientData)gn); 661 (void)Lst_AtEnd(gn->preds, (ClientData)predecessor); 662 } 663 /* 664 * The current source now becomes the predecessor for the next one. 665 */ 666 predecessor = gn; 667 break; 668 669 default: 670 /* 671 * If the source is not an attribute, we need to find/create 672 * a node for it. After that we can apply any operator to it 673 * from a special target or link it to its parents, as 674 * appropriate. 675 * 676 * In the case of a source that was the object of a :: operator, 677 * the attribute is applied to all of its instances (as kept in 678 * the 'cohorts' list of the node) or all the cohorts are linked 679 * to all the targets. 680 */ 681 gn = Targ_FindNode (src, TARG_CREATE); 682 if (tOp) { 683 gn->type |= tOp; 684 } else { 685 Lst_ForEach (targets, ParseLinkSrc, (ClientData)gn); 686 } 687 break; 688 } 689 690 gn->order = waiting; 691 (void)Lst_AtEnd(allsrc, (ClientData)gn); 692 if (waiting) { 693 Lst_ForEach(allsrc, ParseAddDep, (ClientData)gn); 694 } 695 } 696 697 /*- 698 *----------------------------------------------------------------------- 699 * ParseFindMain -- 700 * Find a real target in the list and set it to be the main one. 701 * Called by ParseDoDependency when a main target hasn't been found 702 * yet. 703 * 704 * Results: 705 * 0 if main not found yet, 1 if it is. 706 * 707 * Side Effects: 708 * mainNode is changed and Targ_SetMain is called. 709 * 710 *----------------------------------------------------------------------- 711 */ 712 static int 713 ParseFindMain(gnp, dummy) 714 ClientData gnp; /* Node to examine */ 715 ClientData dummy; 716 { 717 GNode *gn = (GNode *) gnp; 718 if ((gn->type & OP_NOTARGET) == 0) { 719 mainNode = gn; 720 Targ_SetMain(gn); 721 return (dummy ? 1 : 1); 722 } else { 723 return (dummy ? 0 : 0); 724 } 725 } 726 727 /*- 728 *----------------------------------------------------------------------- 729 * ParseAddDir -- 730 * Front-end for Dir_AddDir to make sure Lst_ForEach keeps going 731 * 732 * Results: 733 * === 0 734 * 735 * Side Effects: 736 * See Dir_AddDir. 737 * 738 *----------------------------------------------------------------------- 739 */ 740 static int 741 ParseAddDir(path, name) 742 ClientData path; 743 ClientData name; 744 { 745 (void) Dir_AddDir((Lst) path, (char *) name); 746 return(0); 747 } 748 749 /*- 750 *----------------------------------------------------------------------- 751 * ParseClearPath -- 752 * Front-end for Dir_ClearPath to make sure Lst_ForEach keeps going 753 * 754 * Results: 755 * === 0 756 * 757 * Side Effects: 758 * See Dir_ClearPath 759 * 760 *----------------------------------------------------------------------- 761 */ 762 static int 763 ParseClearPath(path, dummy) 764 ClientData path; 765 ClientData dummy; 766 { 767 Dir_ClearPath((Lst) path); 768 return(dummy ? 0 : 0); 769 } 770 771 /*- 772 *--------------------------------------------------------------------- 773 * ParseDoDependency -- 774 * Parse the dependency line in line. 775 * 776 * Results: 777 * None 778 * 779 * Side Effects: 780 * The nodes of the sources are linked as children to the nodes of the 781 * targets. Some nodes may be created. 782 * 783 * We parse a dependency line by first extracting words from the line and 784 * finding nodes in the list of all targets with that name. This is done 785 * until a character is encountered which is an operator character. Currently 786 * these are only ! and :. At this point the operator is parsed and the 787 * pointer into the line advanced until the first source is encountered. 788 * The parsed operator is applied to each node in the 'targets' list, 789 * which is where the nodes found for the targets are kept, by means of 790 * the ParseDoOp function. 791 * The sources are read in much the same way as the targets were except 792 * that now they are expanded using the wildcarding scheme of the C-Shell 793 * and all instances of the resulting words in the list of all targets 794 * are found. Each of the resulting nodes is then linked to each of the 795 * targets as one of its children. 796 * Certain targets are handled specially. These are the ones detailed 797 * by the specType variable. 798 * The storing of transformation rules is also taken care of here. 799 * A target is recognized as a transformation rule by calling 800 * Suff_IsTransform. If it is a transformation rule, its node is gotten 801 * from the suffix module via Suff_AddTransform rather than the standard 802 * Targ_FindNode in the target module. 803 *--------------------------------------------------------------------- 804 */ 805 static void 806 ParseDoDependency (line) 807 char *line; /* the line to parse */ 808 { 809 char *cp; /* our current position */ 810 GNode *gn; /* a general purpose temporary node */ 811 int op; /* the operator on the line */ 812 char savec; /* a place to save a character */ 813 Lst paths; /* List of search paths to alter when parsing 814 * a list of .PATH targets */ 815 int tOp; /* operator from special target */ 816 Lst sources; /* list of archive source names after 817 * expansion */ 818 Lst curTargs; /* list of target names to be found and added 819 * to the targets list */ 820 Lst curSrcs; /* list of sources in order */ 821 822 tOp = 0; 823 824 specType = Not; 825 waiting = 0; 826 paths = (Lst)NULL; 827 828 curTargs = Lst_Init(FALSE); 829 curSrcs = Lst_Init(FALSE); 830 831 do { 832 for (cp = line; 833 *cp && !isspace ((unsigned char)*cp) && 834 (*cp != '!') && (*cp != ':') && (*cp != '('); 835 cp++) 836 { 837 if (*cp == '$') { 838 /* 839 * Must be a dynamic source (would have been expanded 840 * otherwise), so call the Var module to parse the puppy 841 * so we can safely advance beyond it...There should be 842 * no errors in this, as they would have been discovered 843 * in the initial Var_Subst and we wouldn't be here. 844 */ 845 int length; 846 Boolean freeIt; 847 char *result; 848 849 result=Var_Parse(cp, VAR_CMD, TRUE, &length, &freeIt); 850 851 if (freeIt) { 852 free(result); 853 } 854 cp += length-1; 855 } 856 continue; 857 } 858 if (*cp == '(') { 859 /* 860 * Archives must be handled specially to make sure the OP_ARCHV 861 * flag is set in their 'type' field, for one thing, and because 862 * things like "archive(file1.o file2.o file3.o)" are permissible. 863 * Arch_ParseArchive will set 'line' to be the first non-blank 864 * after the archive-spec. It creates/finds nodes for the members 865 * and places them on the given list, returning SUCCESS if all 866 * went well and FAILURE if there was an error in the 867 * specification. On error, line should remain untouched. 868 */ 869 if (Arch_ParseArchive (&line, targets, VAR_CMD) != SUCCESS) { 870 Parse_Error (PARSE_FATAL, 871 "Error in archive specification: \"%s\"", line); 872 return; 873 } else { 874 continue; 875 } 876 } 877 savec = *cp; 878 879 if (!*cp) { 880 /* 881 * Ending a dependency line without an operator is a Bozo 882 * no-no 883 */ 884 Parse_Error (PARSE_FATAL, "Need an operator"); 885 return; 886 } 887 *cp = '\0'; 888 /* 889 * Have a word in line. See if it's a special target and set 890 * specType to match it. 891 */ 892 if (*line == '.' && isupper ((unsigned char)line[1])) { 893 /* 894 * See if the target is a special target that must have it 895 * or its sources handled specially. 896 */ 897 int keywd = ParseFindKeyword(line); 898 if (keywd != -1) { 899 if (specType == ExPath && parseKeywords[keywd].spec != ExPath) { 900 Parse_Error(PARSE_FATAL, "Mismatched special targets"); 901 return; 902 } 903 904 specType = parseKeywords[keywd].spec; 905 tOp = parseKeywords[keywd].op; 906 907 /* 908 * Certain special targets have special semantics: 909 * .PATH Have to set the dirSearchPath 910 * variable too 911 * .MAIN Its sources are only used if 912 * nothing has been specified to 913 * create. 914 * .DEFAULT Need to create a node to hang 915 * commands on, but we don't want 916 * it in the graph, nor do we want 917 * it to be the Main Target, so we 918 * create it, set OP_NOTMAIN and 919 * add it to the list, setting 920 * DEFAULT to the new node for 921 * later use. We claim the node is 922 * A transformation rule to make 923 * life easier later, when we'll 924 * use Make_HandleUse to actually 925 * apply the .DEFAULT commands. 926 * .PHONY The list of targets 927 * .NOPATH Don't search for file in the path 928 * .BEGIN 929 * .END 930 * .INTERRUPT Are not to be considered the 931 * main target. 932 * .NOTPARALLEL Make only one target at a time. 933 * .SINGLESHELL Create a shell for each command. 934 * .ORDER Must set initial predecessor to NIL 935 */ 936 switch (specType) { 937 case ExPath: 938 if (paths == NULL) { 939 paths = Lst_Init(FALSE); 940 } 941 (void)Lst_AtEnd(paths, (ClientData)dirSearchPath); 942 break; 943 case Main: 944 if (!Lst_IsEmpty(create)) { 945 specType = Not; 946 } 947 break; 948 case Begin: 949 case End: 950 case Interrupt: 951 gn = Targ_FindNode(line, TARG_CREATE); 952 gn->type |= OP_NOTMAIN; 953 (void)Lst_AtEnd(targets, (ClientData)gn); 954 break; 955 case Default: 956 gn = Targ_NewGN(".DEFAULT"); 957 gn->type |= (OP_NOTMAIN|OP_TRANSFORM); 958 (void)Lst_AtEnd(targets, (ClientData)gn); 959 DEFAULT = gn; 960 break; 961 case NotParallel: 962 { 963 maxJobs = 1; 964 break; 965 } 966 case SingleShell: 967 compatMake = TRUE; 968 break; 969 case Order: 970 predecessor = NILGNODE; 971 break; 972 default: 973 break; 974 } 975 } else if (strncmp (line, ".PATH", 5) == 0) { 976 /* 977 * .PATH<suffix> has to be handled specially. 978 * Call on the suffix module to give us a path to 979 * modify. 980 */ 981 Lst path; 982 983 specType = ExPath; 984 path = Suff_GetPath (&line[5]); 985 if (path == NILLST) { 986 Parse_Error (PARSE_FATAL, 987 "Suffix '%s' not defined (yet)", 988 &line[5]); 989 return; 990 } else { 991 if (paths == (Lst)NULL) { 992 paths = Lst_Init(FALSE); 993 } 994 (void)Lst_AtEnd(paths, (ClientData)path); 995 } 996 } 997 } 998 999 /* 1000 * Have word in line. Get or create its node and stick it at 1001 * the end of the targets list 1002 */ 1003 if ((specType == Not) && (*line != '\0')) { 1004 if (Dir_HasWildcards(line)) { 1005 /* 1006 * Targets are to be sought only in the current directory, 1007 * so create an empty path for the thing. Note we need to 1008 * use Dir_Destroy in the destruction of the path as the 1009 * Dir module could have added a directory to the path... 1010 */ 1011 Lst emptyPath = Lst_Init(FALSE); 1012 1013 Dir_Expand(line, emptyPath, curTargs); 1014 1015 Lst_Destroy(emptyPath, Dir_Destroy); 1016 } else { 1017 /* 1018 * No wildcards, but we want to avoid code duplication, 1019 * so create a list with the word on it. 1020 */ 1021 (void)Lst_AtEnd(curTargs, (ClientData)line); 1022 } 1023 1024 while(!Lst_IsEmpty(curTargs)) { 1025 char *targName = (char *)Lst_DeQueue(curTargs); 1026 1027 if (!Suff_IsTransform (targName)) { 1028 gn = Targ_FindNode (targName, TARG_CREATE); 1029 } else { 1030 gn = Suff_AddTransform (targName); 1031 } 1032 1033 (void)Lst_AtEnd (targets, (ClientData)gn); 1034 } 1035 } else if (specType == ExPath && *line != '.' && *line != '\0') { 1036 Parse_Error(PARSE_WARNING, "Extra target (%s) ignored", line); 1037 } 1038 1039 *cp = savec; 1040 /* 1041 * If it is a special type and not .PATH, it's the only target we 1042 * allow on this line... 1043 */ 1044 if (specType != Not && specType != ExPath) { 1045 Boolean warn = FALSE; 1046 1047 while ((*cp != '!') && (*cp != ':') && *cp) { 1048 if (*cp != ' ' && *cp != '\t') { 1049 warn = TRUE; 1050 } 1051 cp++; 1052 } 1053 if (warn) { 1054 Parse_Error(PARSE_WARNING, "Extra target ignored"); 1055 } 1056 } else { 1057 while (*cp && isspace ((unsigned char)*cp)) { 1058 cp++; 1059 } 1060 } 1061 line = cp; 1062 } while ((*line != '!') && (*line != ':') && *line); 1063 1064 /* 1065 * Don't need the list of target names anymore... 1066 */ 1067 Lst_Destroy(curTargs, NOFREE); 1068 1069 if (!Lst_IsEmpty(targets)) { 1070 switch(specType) { 1071 default: 1072 Parse_Error(PARSE_WARNING, "Special and mundane targets don't mix. Mundane ones ignored"); 1073 break; 1074 case Default: 1075 case Begin: 1076 case End: 1077 case Interrupt: 1078 /* 1079 * These four create nodes on which to hang commands, so 1080 * targets shouldn't be empty... 1081 */ 1082 case Not: 1083 /* 1084 * Nothing special here -- targets can be empty if it wants. 1085 */ 1086 break; 1087 } 1088 } 1089 1090 /* 1091 * Have now parsed all the target names. Must parse the operator next. The 1092 * result is left in op . 1093 */ 1094 if (*cp == '!') { 1095 op = OP_FORCE; 1096 } else if (*cp == ':') { 1097 if (cp[1] == ':') { 1098 op = OP_DOUBLEDEP; 1099 cp++; 1100 } else { 1101 op = OP_DEPENDS; 1102 } 1103 } else { 1104 Parse_Error (PARSE_FATAL, "Missing dependency operator"); 1105 return; 1106 } 1107 1108 cp++; /* Advance beyond operator */ 1109 1110 Lst_ForEach (targets, ParseDoOp, (ClientData)&op); 1111 1112 /* 1113 * Get to the first source 1114 */ 1115 while (*cp && isspace ((unsigned char)*cp)) { 1116 cp++; 1117 } 1118 line = cp; 1119 1120 /* 1121 * Several special targets take different actions if present with no 1122 * sources: 1123 * a .SUFFIXES line with no sources clears out all old suffixes 1124 * a .PRECIOUS line makes all targets precious 1125 * a .IGNORE line ignores errors for all targets 1126 * a .SILENT line creates silence when making all targets 1127 * a .PATH removes all directories from the search path(s). 1128 */ 1129 if (!*line) { 1130 switch (specType) { 1131 case Suffixes: 1132 Suff_ClearSuffixes (); 1133 break; 1134 case Precious: 1135 allPrecious = TRUE; 1136 break; 1137 case Ignore: 1138 ignoreErrors = TRUE; 1139 break; 1140 case Silent: 1141 beSilent = TRUE; 1142 break; 1143 case ExPath: 1144 Lst_ForEach(paths, ParseClearPath, (ClientData)NULL); 1145 break; 1146 #ifdef POSIX 1147 case Posix: 1148 Var_Set("%POSIX", "1003.2", VAR_GLOBAL); 1149 break; 1150 #endif 1151 default: 1152 break; 1153 } 1154 } else if (specType == MFlags) { 1155 /* 1156 * Call on functions in main.c to deal with these arguments and 1157 * set the initial character to a null-character so the loop to 1158 * get sources won't get anything 1159 */ 1160 Main_ParseArgLine (line); 1161 *line = '\0'; 1162 } else if (specType == ExShell) { 1163 if (Job_ParseShell (line) != SUCCESS) { 1164 Parse_Error (PARSE_FATAL, "improper shell specification"); 1165 return; 1166 } 1167 *line = '\0'; 1168 } else if ((specType == NotParallel) || (specType == SingleShell)) { 1169 *line = '\0'; 1170 } 1171 1172 /* 1173 * NOW GO FOR THE SOURCES 1174 */ 1175 if ((specType == Suffixes) || (specType == ExPath) || 1176 (specType == Includes) || (specType == Libs) || 1177 (specType == Null)) 1178 { 1179 while (*line) { 1180 /* 1181 * If the target was one that doesn't take files as its sources 1182 * but takes something like suffixes, we take each 1183 * space-separated word on the line as a something and deal 1184 * with it accordingly. 1185 * 1186 * If the target was .SUFFIXES, we take each source as a 1187 * suffix and add it to the list of suffixes maintained by the 1188 * Suff module. 1189 * 1190 * If the target was a .PATH, we add the source as a directory 1191 * to search on the search path. 1192 * 1193 * If it was .INCLUDES, the source is taken to be the suffix of 1194 * files which will be #included and whose search path should 1195 * be present in the .INCLUDES variable. 1196 * 1197 * If it was .LIBS, the source is taken to be the suffix of 1198 * files which are considered libraries and whose search path 1199 * should be present in the .LIBS variable. 1200 * 1201 * If it was .NULL, the source is the suffix to use when a file 1202 * has no valid suffix. 1203 */ 1204 char savec; 1205 while (*cp && !isspace ((unsigned char)*cp)) { 1206 cp++; 1207 } 1208 savec = *cp; 1209 *cp = '\0'; 1210 switch (specType) { 1211 case Suffixes: 1212 Suff_AddSuffix (line, &mainNode); 1213 break; 1214 case ExPath: 1215 Lst_ForEach(paths, ParseAddDir, (ClientData)line); 1216 break; 1217 case Includes: 1218 Suff_AddInclude (line); 1219 break; 1220 case Libs: 1221 Suff_AddLib (line); 1222 break; 1223 case Null: 1224 Suff_SetNull (line); 1225 break; 1226 default: 1227 break; 1228 } 1229 *cp = savec; 1230 if (savec != '\0') { 1231 cp++; 1232 } 1233 while (*cp && isspace ((unsigned char)*cp)) { 1234 cp++; 1235 } 1236 line = cp; 1237 } 1238 if (paths) { 1239 Lst_Destroy(paths, NOFREE); 1240 } 1241 } else { 1242 while (*line) { 1243 /* 1244 * The targets take real sources, so we must beware of archive 1245 * specifications (i.e. things with left parentheses in them) 1246 * and handle them accordingly. 1247 */ 1248 while (*cp && !isspace ((unsigned char)*cp)) { 1249 if ((*cp == '(') && (cp > line) && (cp[-1] != '$')) { 1250 /* 1251 * Only stop for a left parenthesis if it isn't at the 1252 * start of a word (that'll be for variable changes 1253 * later) and isn't preceded by a dollar sign (a dynamic 1254 * source). 1255 */ 1256 break; 1257 } else { 1258 cp++; 1259 } 1260 } 1261 1262 if (*cp == '(') { 1263 GNode *gn; 1264 1265 sources = Lst_Init (FALSE); 1266 if (Arch_ParseArchive (&line, sources, VAR_CMD) != SUCCESS) { 1267 Parse_Error (PARSE_FATAL, 1268 "Error in source archive spec \"%s\"", line); 1269 return; 1270 } 1271 1272 while (!Lst_IsEmpty (sources)) { 1273 gn = (GNode *) Lst_DeQueue (sources); 1274 ParseDoSrc (tOp, gn->name, curSrcs); 1275 } 1276 Lst_Destroy (sources, NOFREE); 1277 cp = line; 1278 } else { 1279 if (*cp) { 1280 *cp = '\0'; 1281 cp += 1; 1282 } 1283 1284 ParseDoSrc (tOp, line, curSrcs); 1285 } 1286 while (*cp && isspace ((unsigned char)*cp)) { 1287 cp++; 1288 } 1289 line = cp; 1290 } 1291 } 1292 1293 if (mainNode == NILGNODE) { 1294 /* 1295 * If we have yet to decide on a main target to make, in the 1296 * absence of any user input, we want the first target on 1297 * the first dependency line that is actually a real target 1298 * (i.e. isn't a .USE or .EXEC rule) to be made. 1299 */ 1300 Lst_ForEach (targets, ParseFindMain, (ClientData)0); 1301 } 1302 1303 /* 1304 * Finally, destroy the list of sources 1305 */ 1306 Lst_Destroy(curSrcs, NOFREE); 1307 } 1308 1309 /*- 1310 *--------------------------------------------------------------------- 1311 * Parse_IsVar -- 1312 * Return TRUE if the passed line is a variable assignment. A variable 1313 * assignment consists of a single word followed by optional whitespace 1314 * followed by either a += or an = operator. 1315 * This function is used both by the Parse_File function and main when 1316 * parsing the command-line arguments. 1317 * 1318 * Results: 1319 * TRUE if it is. FALSE if it ain't 1320 * 1321 * Side Effects: 1322 * none 1323 *--------------------------------------------------------------------- 1324 */ 1325 Boolean 1326 Parse_IsVar (line) 1327 register char *line; /* the line to check */ 1328 { 1329 register Boolean wasSpace = FALSE; /* set TRUE if found a space */ 1330 register Boolean haveName = FALSE; /* Set TRUE if have a variable name */ 1331 int level = 0; 1332 #define ISEQOPERATOR(c) \ 1333 (((c) == '+') || ((c) == ':') || ((c) == '?') || ((c) == '!')) 1334 1335 /* 1336 * Skip to variable name 1337 */ 1338 for (;(*line == ' ') || (*line == '\t'); line++) 1339 continue; 1340 1341 for (; *line != '=' || level != 0; line++) 1342 switch (*line) { 1343 case '\0': 1344 /* 1345 * end-of-line -- can't be a variable assignment. 1346 */ 1347 return FALSE; 1348 1349 case ' ': 1350 case '\t': 1351 /* 1352 * there can be as much white space as desired so long as there is 1353 * only one word before the operator 1354 */ 1355 wasSpace = TRUE; 1356 break; 1357 1358 case '(': 1359 case '{': 1360 level++; 1361 break; 1362 1363 case '}': 1364 case ')': 1365 level--; 1366 break; 1367 1368 default: 1369 if (wasSpace && haveName) { 1370 if (ISEQOPERATOR(*line)) { 1371 /* 1372 * We must have a finished word 1373 */ 1374 if (level != 0) 1375 return FALSE; 1376 1377 /* 1378 * When an = operator [+?!:] is found, the next 1379 * character must be an = or it ain't a valid 1380 * assignment. 1381 */ 1382 if (line[1] == '=') 1383 return haveName; 1384 #ifdef SUNSHCMD 1385 /* 1386 * This is a shell command 1387 */ 1388 if (strncmp(line, ":sh", 3) == 0) 1389 return haveName; 1390 #endif 1391 } 1392 /* 1393 * This is the start of another word, so not assignment. 1394 */ 1395 return FALSE; 1396 } 1397 else { 1398 haveName = TRUE; 1399 wasSpace = FALSE; 1400 } 1401 break; 1402 } 1403 1404 return haveName; 1405 } 1406 1407 /*- 1408 *--------------------------------------------------------------------- 1409 * Parse_DoVar -- 1410 * Take the variable assignment in the passed line and do it in the 1411 * global context. 1412 * 1413 * Note: There is a lexical ambiguity with assignment modifier characters 1414 * in variable names. This routine interprets the character before the = 1415 * as a modifier. Therefore, an assignment like 1416 * C++=/usr/bin/CC 1417 * is interpreted as "C+ +=" instead of "C++ =". 1418 * 1419 * Results: 1420 * none 1421 * 1422 * Side Effects: 1423 * the variable structure of the given variable name is altered in the 1424 * global context. 1425 *--------------------------------------------------------------------- 1426 */ 1427 void 1428 Parse_DoVar (line, ctxt) 1429 char *line; /* a line guaranteed to be a variable 1430 * assignment. This reduces error checks */ 1431 GNode *ctxt; /* Context in which to do the assignment */ 1432 { 1433 char *cp; /* pointer into line */ 1434 enum { 1435 VAR_SUBST, VAR_APPEND, VAR_SHELL, VAR_NORMAL 1436 } type; /* Type of assignment */ 1437 char *opc; /* ptr to operator character to 1438 * null-terminate the variable name */ 1439 /* 1440 * Avoid clobbered variable warnings by forcing the compiler 1441 * to ``unregister'' variables 1442 */ 1443 #if __GNUC__ 1444 (void) &cp; 1445 (void) &line; 1446 #endif 1447 1448 /* 1449 * Skip to variable name 1450 */ 1451 while ((*line == ' ') || (*line == '\t')) { 1452 line++; 1453 } 1454 1455 /* 1456 * Skip to operator character, nulling out whitespace as we go 1457 */ 1458 for (cp = line + 1; *cp != '='; cp++) { 1459 if (isspace ((unsigned char)*cp)) { 1460 *cp = '\0'; 1461 } 1462 } 1463 opc = cp-1; /* operator is the previous character */ 1464 *cp++ = '\0'; /* nuke the = */ 1465 1466 /* 1467 * Check operator type 1468 */ 1469 switch (*opc) { 1470 case '+': 1471 type = VAR_APPEND; 1472 *opc = '\0'; 1473 break; 1474 1475 case '?': 1476 /* 1477 * If the variable already has a value, we don't do anything. 1478 */ 1479 *opc = '\0'; 1480 if (Var_Exists(line, ctxt)) { 1481 return; 1482 } else { 1483 type = VAR_NORMAL; 1484 } 1485 break; 1486 1487 case ':': 1488 type = VAR_SUBST; 1489 *opc = '\0'; 1490 break; 1491 1492 case '!': 1493 type = VAR_SHELL; 1494 *opc = '\0'; 1495 break; 1496 1497 default: 1498 #ifdef SUNSHCMD 1499 while (opc > line && *opc != ':') 1500 opc--; 1501 1502 if (strncmp(opc, ":sh", 3) == 0) { 1503 type = VAR_SHELL; 1504 *opc = '\0'; 1505 break; 1506 } 1507 #endif 1508 type = VAR_NORMAL; 1509 break; 1510 } 1511 1512 while (isspace ((unsigned char)*cp)) { 1513 cp++; 1514 } 1515 1516 if (type == VAR_APPEND) { 1517 Var_Append (line, cp, ctxt); 1518 } else if (type == VAR_SUBST) { 1519 /* 1520 * Allow variables in the old value to be undefined, but leave their 1521 * invocation alone -- this is done by forcing oldVars to be false. 1522 * XXX: This can cause recursive variables, but that's not hard to do, 1523 * and this allows someone to do something like 1524 * 1525 * CFLAGS = $(.INCLUDES) 1526 * CFLAGS := -I.. $(CFLAGS) 1527 * 1528 * And not get an error. 1529 */ 1530 Boolean oldOldVars = oldVars; 1531 1532 oldVars = FALSE; 1533 1534 /* 1535 * make sure that we set the variable the first time to nothing 1536 * so that it gets substituted! 1537 */ 1538 if (!Var_Exists(line, ctxt)) 1539 Var_Set(line, "", ctxt); 1540 1541 cp = Var_Subst(NULL, cp, ctxt, FALSE); 1542 oldVars = oldOldVars; 1543 1544 Var_Set(line, cp, ctxt); 1545 free(cp); 1546 } else if (type == VAR_SHELL) { 1547 Boolean freeCmd = FALSE; /* TRUE if the command needs to be freed, i.e. 1548 * if any variable expansion was performed */ 1549 char *res, *err; 1550 1551 if (strchr(cp, '$') != NULL) { 1552 /* 1553 * There's a dollar sign in the command, so perform variable 1554 * expansion on the whole thing. The resulting string will need 1555 * freeing when we're done, so set freeCmd to TRUE. 1556 */ 1557 cp = Var_Subst(NULL, cp, VAR_CMD, TRUE); 1558 freeCmd = TRUE; 1559 } 1560 1561 res = Cmd_Exec(cp, &err); 1562 Var_Set(line, res, ctxt); 1563 free(res); 1564 1565 if (err) 1566 Parse_Error(PARSE_WARNING, err, cp); 1567 1568 if (freeCmd) 1569 free(cp); 1570 } else { 1571 /* 1572 * Normal assignment -- just do it. 1573 */ 1574 Var_Set(line, cp, ctxt); 1575 } 1576 } 1577 1578 1579 /*- 1580 * ParseAddCmd -- 1581 * Lst_ForEach function to add a command line to all targets 1582 * 1583 * Results: 1584 * Always 0 1585 * 1586 * Side Effects: 1587 * A new element is added to the commands list of the node. 1588 */ 1589 static int 1590 ParseAddCmd(gnp, cmd) 1591 ClientData gnp; /* the node to which the command is to be added */ 1592 ClientData cmd; /* the command to add */ 1593 { 1594 GNode *gn = (GNode *) gnp; 1595 /* if target already supplied, ignore commands */ 1596 if ((gn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (gn->cohorts)) 1597 gn = (GNode *) Lst_Datum (Lst_Last (gn->cohorts)); 1598 if (!(gn->type & OP_HAS_COMMANDS)) { 1599 (void)Lst_AtEnd(gn->commands, cmd); 1600 ParseMark(gn); 1601 } else { 1602 #ifdef notyet 1603 /* XXX: We cannot do this until we fix the tree */ 1604 (void)Lst_AtEnd(gn->commands, cmd); 1605 Parse_Error (PARSE_WARNING, 1606 "overriding commands for target \"%s\"; " 1607 "previous commands defined at %s: %d ignored", 1608 gn->name, gn->fname, gn->lineno); 1609 #else 1610 Parse_Error (PARSE_WARNING, 1611 "duplicate script for target \"%s\" ignored", 1612 gn->name); 1613 ParseErrorInternal (gn->fname, gn->lineno, PARSE_WARNING, 1614 "using previous script for \"%s\" defined here", 1615 gn->name); 1616 #endif 1617 } 1618 return(0); 1619 } 1620 1621 /*- 1622 *----------------------------------------------------------------------- 1623 * ParseHasCommands -- 1624 * Callback procedure for Parse_File when destroying the list of 1625 * targets on the last dependency line. Marks a target as already 1626 * having commands if it does, to keep from having shell commands 1627 * on multiple dependency lines. 1628 * 1629 * Results: 1630 * None 1631 * 1632 * Side Effects: 1633 * OP_HAS_COMMANDS may be set for the target. 1634 * 1635 *----------------------------------------------------------------------- 1636 */ 1637 static void 1638 ParseHasCommands(gnp) 1639 ClientData gnp; /* Node to examine */ 1640 { 1641 GNode *gn = (GNode *) gnp; 1642 if (!Lst_IsEmpty(gn->commands)) { 1643 gn->type |= OP_HAS_COMMANDS; 1644 } 1645 } 1646 1647 /*- 1648 *----------------------------------------------------------------------- 1649 * Parse_AddIncludeDir -- 1650 * Add a directory to the path searched for included makefiles 1651 * bracketed by double-quotes. Used by functions in main.c 1652 * 1653 * Results: 1654 * None. 1655 * 1656 * Side Effects: 1657 * The directory is appended to the list. 1658 * 1659 *----------------------------------------------------------------------- 1660 */ 1661 void 1662 Parse_AddIncludeDir (dir) 1663 char *dir; /* The name of the directory to add */ 1664 { 1665 (void) Dir_AddDir (parseIncPath, dir); 1666 } 1667 1668 /*- 1669 *--------------------------------------------------------------------- 1670 * ParseDoInclude -- 1671 * Push to another file. 1672 * 1673 * The input is the line minus the `.'. A file spec is a string 1674 * enclosed in <> or "". The former is looked for only in sysIncPath. 1675 * The latter in . and the directories specified by -I command line 1676 * options 1677 * 1678 * Results: 1679 * None 1680 * 1681 * Side Effects: 1682 * A structure is added to the includes Lst and readProc, lineno, 1683 * fname and curFILE are altered for the new file 1684 *--------------------------------------------------------------------- 1685 */ 1686 static void 1687 ParseDoInclude (line) 1688 char *line; 1689 { 1690 char *fullname; /* full pathname of file */ 1691 IFile *oldFile; /* state associated with current file */ 1692 char endc; /* the character which ends the file spec */ 1693 char *cp; /* current position in file spec */ 1694 Boolean isSystem; /* TRUE if makefile is a system makefile */ 1695 int silent = (*line != 'i') ? 1 : 0; 1696 char *file = &line[7 + silent]; 1697 1698 /* 1699 * Skip to delimiter character so we know where to look 1700 */ 1701 while ((*file == ' ') || (*file == '\t')) { 1702 file++; 1703 } 1704 1705 if ((*file != '"') && (*file != '<')) { 1706 Parse_Error (PARSE_FATAL, 1707 ".include filename must be delimited by '\"' or '<'"); 1708 return; 1709 } 1710 1711 /* 1712 * Set the search path on which to find the include file based on the 1713 * characters which bracket its name. Angle-brackets imply it's 1714 * a system Makefile while double-quotes imply it's a user makefile 1715 */ 1716 if (*file == '<') { 1717 isSystem = TRUE; 1718 endc = '>'; 1719 } else { 1720 isSystem = FALSE; 1721 endc = '"'; 1722 } 1723 1724 /* 1725 * Skip to matching delimiter 1726 */ 1727 for (cp = ++file; *cp && *cp != endc; cp++) { 1728 continue; 1729 } 1730 1731 if (*cp != endc) { 1732 Parse_Error (PARSE_FATAL, 1733 "Unclosed %cinclude filename. '%c' expected", 1734 '.', endc); 1735 return; 1736 } 1737 *cp = '\0'; 1738 1739 /* 1740 * Substitute for any variables in the file name before trying to 1741 * find the thing. 1742 */ 1743 file = Var_Subst (NULL, file, VAR_CMD, FALSE); 1744 1745 /* 1746 * Now we know the file's name and its search path, we attempt to 1747 * find the durn thing. A return of NULL indicates the file don't 1748 * exist. 1749 */ 1750 if (!isSystem) { 1751 /* 1752 * Include files contained in double-quotes are first searched for 1753 * relative to the including file's location. We don't want to 1754 * cd there, of course, so we just tack on the old file's 1755 * leading path components and call Dir_FindFile to see if 1756 * we can locate the beast. 1757 */ 1758 char *prefEnd, *Fname; 1759 1760 /* Make a temporary copy of this, to be safe. */ 1761 Fname = estrdup(fname); 1762 1763 prefEnd = strrchr (Fname, '/'); 1764 if (prefEnd != (char *)NULL) { 1765 char *newName; 1766 1767 *prefEnd = '\0'; 1768 if (file[0] == '/') 1769 newName = estrdup(file); 1770 else 1771 newName = str_concat (Fname, file, STR_ADDSLASH); 1772 fullname = Dir_FindFile (newName, parseIncPath); 1773 if (fullname == (char *)NULL) { 1774 fullname = Dir_FindFile(newName, dirSearchPath); 1775 } 1776 free (newName); 1777 *prefEnd = '/'; 1778 } else { 1779 fullname = (char *)NULL; 1780 } 1781 free (Fname); 1782 } else { 1783 fullname = (char *)NULL; 1784 } 1785 1786 if (fullname == (char *)NULL) { 1787 /* 1788 * System makefile or makefile wasn't found in same directory as 1789 * included makefile. Search for it first on the -I search path, 1790 * then on the .PATH search path, if not found in a -I directory. 1791 * XXX: Suffix specific? 1792 */ 1793 fullname = Dir_FindFile (file, parseIncPath); 1794 if (fullname == (char *)NULL) { 1795 fullname = Dir_FindFile(file, dirSearchPath); 1796 } 1797 } 1798 1799 if (fullname == (char *)NULL) { 1800 /* 1801 * Still haven't found the makefile. Look for it on the system 1802 * path as a last resort. 1803 */ 1804 fullname = Dir_FindFile(file, sysIncPath); 1805 } 1806 1807 if (fullname == (char *) NULL) { 1808 *cp = endc; 1809 if (!silent) 1810 Parse_Error (PARSE_FATAL, "Could not find %s", file); 1811 return; 1812 } 1813 1814 free(file); 1815 1816 /* 1817 * Once we find the absolute path to the file, we get to save all the 1818 * state from the current file before we can start reading this 1819 * include file. The state is stored in an IFile structure which 1820 * is placed on a list with other IFile structures. The list makes 1821 * a very nice stack to track how we got here... 1822 */ 1823 oldFile = (IFile *) emalloc (sizeof (IFile)); 1824 oldFile->fname = fname; 1825 1826 oldFile->F = curFILE; 1827 oldFile->p = curPTR; 1828 oldFile->lineno = lineno; 1829 1830 (void) Lst_AtFront (includes, (ClientData)oldFile); 1831 1832 /* 1833 * Once the previous state has been saved, we can get down to reading 1834 * the new file. We set up the name of the file to be the absolute 1835 * name of the include file so error messages refer to the right 1836 * place. Naturally enough, we start reading at line number 0. 1837 */ 1838 fname = fullname; 1839 lineno = 0; 1840 1841 ParseSetParseFile(fname); 1842 1843 curFILE = fopen (fullname, "r"); 1844 curPTR = NULL; 1845 if (curFILE == (FILE * ) NULL) { 1846 if (!silent) 1847 Parse_Error (PARSE_FATAL, "Cannot open %s", fullname); 1848 /* 1849 * Pop to previous file 1850 */ 1851 (void) ParseEOF(0); 1852 } 1853 } 1854 1855 1856 /*- 1857 *--------------------------------------------------------------------- 1858 * ParseSetParseFile -- 1859 * Set the .PARSEDIR and .PARSEFILE variables to the dirname and 1860 * basename of the given filename 1861 * 1862 * Results: 1863 * None 1864 * 1865 * Side Effects: 1866 * The .PARSEDIR and .PARSEFILE variables are overwritten by the 1867 * dirname and basename of the given filename. 1868 *--------------------------------------------------------------------- 1869 */ 1870 static void 1871 ParseSetParseFile(fname) 1872 char *fname; 1873 { 1874 char *slash; 1875 1876 slash = strrchr(fname, '/'); 1877 if (slash == 0) { 1878 Var_Set(".PARSEDIR", ".", VAR_GLOBAL); 1879 Var_Set(".PARSEFILE", fname, VAR_GLOBAL); 1880 } else { 1881 *slash = '\0'; 1882 Var_Set(".PARSEDIR", fname, VAR_GLOBAL); 1883 Var_Set(".PARSEFILE", slash+1, VAR_GLOBAL); 1884 *slash = '/'; 1885 } 1886 } 1887 1888 1889 /*- 1890 *--------------------------------------------------------------------- 1891 * Parse_FromString -- 1892 * Start Parsing from the given string 1893 * 1894 * Results: 1895 * None 1896 * 1897 * Side Effects: 1898 * A structure is added to the includes Lst and readProc, lineno, 1899 * fname and curFILE are altered for the new file 1900 *--------------------------------------------------------------------- 1901 */ 1902 void 1903 Parse_FromString(str) 1904 char *str; 1905 { 1906 IFile *oldFile; /* state associated with this file */ 1907 1908 if (DEBUG(FOR)) 1909 (void) fprintf(stderr, "%s\n----\n", str); 1910 1911 oldFile = (IFile *) emalloc (sizeof (IFile)); 1912 oldFile->lineno = lineno; 1913 oldFile->fname = fname; 1914 oldFile->F = curFILE; 1915 oldFile->p = curPTR; 1916 1917 (void) Lst_AtFront (includes, (ClientData)oldFile); 1918 1919 curFILE = NULL; 1920 curPTR = (PTR *) emalloc (sizeof (PTR)); 1921 curPTR->str = curPTR->ptr = str; 1922 lineno = 0; 1923 fname = estrdup(fname); 1924 } 1925 1926 1927 #ifdef SYSVINCLUDE 1928 /*- 1929 *--------------------------------------------------------------------- 1930 * ParseTraditionalInclude -- 1931 * Push to another file. 1932 * 1933 * The input is the current line. The file name(s) are 1934 * following the "include". 1935 * 1936 * Results: 1937 * None 1938 * 1939 * Side Effects: 1940 * A structure is added to the includes Lst and readProc, lineno, 1941 * fname and curFILE are altered for the new file 1942 *--------------------------------------------------------------------- 1943 */ 1944 static void 1945 ParseTraditionalInclude (line) 1946 char *line; 1947 { 1948 char *fullname; /* full pathname of file */ 1949 IFile *oldFile; /* state associated with current file */ 1950 char *cp; /* current position in file spec */ 1951 char *prefEnd; 1952 int done = 0; 1953 int silent = (line[0] != 'i') ? 1 : 0; 1954 char *file = &line[silent + 7]; 1955 char *cfname = fname; 1956 size_t clineno = lineno; 1957 1958 1959 /* 1960 * Skip over whitespace 1961 */ 1962 while (isspace((unsigned char)*file)) 1963 file++; 1964 1965 if (*file == '\0') { 1966 Parse_Error (PARSE_FATAL, 1967 "Filename missing from \"include\""); 1968 return; 1969 } 1970 1971 for (; !done; file = cp + 1) { 1972 /* 1973 * Skip to end of line or next whitespace 1974 */ 1975 for (cp = file; *cp && !isspace((unsigned char) *cp); cp++) 1976 continue; 1977 1978 if (*cp) 1979 *cp = '\0'; 1980 else 1981 done = 1; 1982 1983 /* 1984 * Substitute for any variables in the file name before trying to 1985 * find the thing. 1986 */ 1987 file = Var_Subst(NULL, file, VAR_CMD, FALSE); 1988 1989 /* 1990 * Now we know the file's name, we attempt to find the durn thing. 1991 * A return of NULL indicates the file don't exist. 1992 * 1993 * Include files are first searched for relative to the including 1994 * file's location. We don't want to cd there, of course, so we 1995 * just tack on the old file's leading path components and call 1996 * Dir_FindFile to see if we can locate the beast. 1997 * XXX - this *does* search in the current directory, right? 1998 */ 1999 2000 prefEnd = strrchr(cfname, '/'); 2001 if (prefEnd != NULL) { 2002 char *newName; 2003 2004 *prefEnd = '\0'; 2005 newName = str_concat(cfname, file, STR_ADDSLASH); 2006 fullname = Dir_FindFile(newName, parseIncPath); 2007 if (fullname == NULL) { 2008 fullname = Dir_FindFile(newName, dirSearchPath); 2009 } 2010 free (newName); 2011 *prefEnd = '/'; 2012 } else { 2013 fullname = NULL; 2014 } 2015 2016 if (fullname == NULL) { 2017 /* 2018 * System makefile or makefile wasn't found in same directory as 2019 * included makefile. Search for it first on the -I search path, 2020 * then on the .PATH search path, if not found in a 2021 * -I directory. XXX: Suffix specific? 2022 */ 2023 fullname = Dir_FindFile(file, parseIncPath); 2024 if (fullname == NULL) { 2025 fullname = Dir_FindFile(file, dirSearchPath); 2026 } 2027 } 2028 2029 if (fullname == NULL) { 2030 /* 2031 * Still haven't found the makefile. Look for it on the system 2032 * path as a last resort. 2033 */ 2034 fullname = Dir_FindFile(file, sysIncPath); 2035 } 2036 2037 if (fullname == NULL) { 2038 if (!silent) 2039 ParseErrorInternal(cfname, clineno, PARSE_FATAL, 2040 "Could not find %s", file); 2041 free(file); 2042 continue; 2043 } 2044 2045 free(file); 2046 2047 /* 2048 * Once we find the absolute path to the file, we get to save all 2049 * the state from the current file before we can start reading this 2050 * include file. The state is stored in an IFile structure which 2051 * is placed on a list with other IFile structures. The list makes 2052 * a very nice stack to track how we got here... 2053 */ 2054 oldFile = (IFile *) emalloc(sizeof(IFile)); 2055 oldFile->fname = fname; 2056 2057 oldFile->F = curFILE; 2058 oldFile->p = curPTR; 2059 oldFile->lineno = lineno; 2060 2061 (void) Lst_AtFront(includes, (ClientData)oldFile); 2062 2063 /* 2064 * Once the previous state has been saved, we can get down to 2065 * reading the new file. We set up the name of the file to be the 2066 * absolute name of the include file so error messages refer to the 2067 * right place. Naturally enough, we start reading at line number 0. 2068 */ 2069 fname = fullname; 2070 lineno = 0; 2071 2072 curFILE = fopen(fullname, "r"); 2073 curPTR = NULL; 2074 if (curFILE == NULL) { 2075 if (!silent) 2076 ParseErrorInternal(cfname, clineno, PARSE_FATAL, 2077 "Cannot open %s", fullname); 2078 /* 2079 * Pop to previous file 2080 */ 2081 (void) ParseEOF(1); 2082 } 2083 } 2084 } 2085 #endif 2086 2087 /*- 2088 *--------------------------------------------------------------------- 2089 * ParseEOF -- 2090 * Called when EOF is reached in the current file. If we were reading 2091 * an include file, the includes stack is popped and things set up 2092 * to go back to reading the previous file at the previous location. 2093 * 2094 * Results: 2095 * CONTINUE if there's more to do. DONE if not. 2096 * 2097 * Side Effects: 2098 * The old curFILE, is closed. The includes list is shortened. 2099 * lineno, curFILE, and fname are changed if CONTINUE is returned. 2100 *--------------------------------------------------------------------- 2101 */ 2102 static int 2103 ParseEOF (opened) 2104 int opened; 2105 { 2106 IFile *ifile; /* the state on the top of the includes stack */ 2107 2108 if (Lst_IsEmpty (includes)) { 2109 Var_Delete(".PARSEDIR", VAR_GLOBAL); 2110 Var_Delete(".PARSEFILE", VAR_GLOBAL); 2111 return (DONE); 2112 } 2113 2114 ifile = (IFile *) Lst_DeQueue (includes); 2115 free ((Address) fname); 2116 fname = ifile->fname; 2117 lineno = ifile->lineno; 2118 if (opened && curFILE) 2119 (void) fclose (curFILE); 2120 if (curPTR) { 2121 free((Address) curPTR->str); 2122 free((Address) curPTR); 2123 } 2124 curFILE = ifile->F; 2125 curPTR = ifile->p; 2126 free ((Address)ifile); 2127 2128 /* pop the PARSEDIR/PARSEFILE variables */ 2129 ParseSetParseFile(fname); 2130 return (CONTINUE); 2131 } 2132 2133 /*- 2134 *--------------------------------------------------------------------- 2135 * ParseReadc -- 2136 * Read a character from the current file 2137 * 2138 * Results: 2139 * The character that was read 2140 * 2141 * Side Effects: 2142 *--------------------------------------------------------------------- 2143 */ 2144 static __inline int 2145 ParseReadc() 2146 { 2147 if (curFILE) 2148 return fgetc(curFILE); 2149 2150 if (curPTR && *curPTR->ptr) 2151 return *curPTR->ptr++; 2152 return EOF; 2153 } 2154 2155 2156 /*- 2157 *--------------------------------------------------------------------- 2158 * ParseUnreadc -- 2159 * Put back a character to the current file 2160 * 2161 * Results: 2162 * None. 2163 * 2164 * Side Effects: 2165 *--------------------------------------------------------------------- 2166 */ 2167 static void 2168 ParseUnreadc(c) 2169 int c; 2170 { 2171 if (curFILE) { 2172 ungetc(c, curFILE); 2173 return; 2174 } 2175 if (curPTR) { 2176 *--(curPTR->ptr) = c; 2177 return; 2178 } 2179 } 2180 2181 2182 /* ParseSkipLine(): 2183 * Grab the next line 2184 */ 2185 static char * 2186 ParseSkipLine(skip) 2187 int skip; /* Skip lines that don't start with . */ 2188 { 2189 char *line; 2190 int c, lastc, lineLength = 0; 2191 Buffer buf; 2192 2193 buf = Buf_Init(MAKE_BSIZE); 2194 2195 do { 2196 Buf_Discard(buf, lineLength); 2197 lastc = '\0'; 2198 2199 while (((c = ParseReadc()) != '\n' || lastc == '\\') 2200 && c != EOF) { 2201 if (c == '\n') { 2202 Buf_ReplaceLastByte(buf, (Byte)' '); 2203 lineno++; 2204 2205 while ((c = ParseReadc()) == ' ' || c == '\t'); 2206 2207 if (c == EOF) 2208 break; 2209 } 2210 2211 Buf_AddByte(buf, (Byte)c); 2212 lastc = c; 2213 } 2214 2215 if (c == EOF) { 2216 Parse_Error(PARSE_FATAL, "Unclosed conditional/for loop"); 2217 Buf_Destroy(buf, TRUE); 2218 return((char *)NULL); 2219 } 2220 2221 lineno++; 2222 Buf_AddByte(buf, (Byte)'\0'); 2223 line = (char *)Buf_GetAll(buf, &lineLength); 2224 } while (skip == 1 && line[0] != '.'); 2225 2226 Buf_Destroy(buf, FALSE); 2227 return line; 2228 } 2229 2230 2231 /*- 2232 *--------------------------------------------------------------------- 2233 * ParseReadLine -- 2234 * Read an entire line from the input file. Called only by Parse_File. 2235 * To facilitate escaped newlines and what have you, a character is 2236 * buffered in 'lastc', which is '\0' when no characters have been 2237 * read. When we break out of the loop, c holds the terminating 2238 * character and lastc holds a character that should be added to 2239 * the line (unless we don't read anything but a terminator). 2240 * 2241 * Results: 2242 * A line w/o its newline 2243 * 2244 * Side Effects: 2245 * Only those associated with reading a character 2246 *--------------------------------------------------------------------- 2247 */ 2248 static char * 2249 ParseReadLine () 2250 { 2251 Buffer buf; /* Buffer for current line */ 2252 register int c; /* the current character */ 2253 register int lastc; /* The most-recent character */ 2254 Boolean semiNL; /* treat semi-colons as newlines */ 2255 Boolean ignDepOp; /* TRUE if should ignore dependency operators 2256 * for the purposes of setting semiNL */ 2257 Boolean ignComment; /* TRUE if should ignore comments (in a 2258 * shell command */ 2259 char *line; /* Result */ 2260 char *ep; /* to strip trailing blanks */ 2261 int lineLength; /* Length of result */ 2262 2263 semiNL = FALSE; 2264 ignDepOp = FALSE; 2265 ignComment = FALSE; 2266 2267 /* 2268 * Handle special-characters at the beginning of the line. Either a 2269 * leading tab (shell command) or pound-sign (possible conditional) 2270 * forces us to ignore comments and dependency operators and treat 2271 * semi-colons as semi-colons (by leaving semiNL FALSE). This also 2272 * discards completely blank lines. 2273 */ 2274 for (;;) { 2275 c = ParseReadc(); 2276 2277 if (c == '\t') { 2278 ignComment = ignDepOp = TRUE; 2279 break; 2280 } else if (c == '\n') { 2281 lineno++; 2282 } else if (c == '#') { 2283 ParseUnreadc(c); 2284 break; 2285 } else { 2286 /* 2287 * Anything else breaks out without doing anything 2288 */ 2289 break; 2290 } 2291 } 2292 2293 if (c != EOF) { 2294 lastc = c; 2295 buf = Buf_Init(MAKE_BSIZE); 2296 2297 while (((c = ParseReadc ()) != '\n' || (lastc == '\\')) && 2298 (c != EOF)) 2299 { 2300 test_char: 2301 switch(c) { 2302 case '\n': 2303 /* 2304 * Escaped newline: read characters until a non-space or an 2305 * unescaped newline and replace them all by a single space. 2306 * This is done by storing the space over the backslash and 2307 * dropping through with the next nonspace. If it is a 2308 * semi-colon and semiNL is TRUE, it will be recognized as a 2309 * newline in the code below this... 2310 */ 2311 lineno++; 2312 lastc = ' '; 2313 while ((c = ParseReadc ()) == ' ' || c == '\t') { 2314 continue; 2315 } 2316 if (c == EOF || c == '\n') { 2317 goto line_read; 2318 } else { 2319 /* 2320 * Check for comments, semiNL's, etc. -- easier than 2321 * ParseUnreadc(c); continue; 2322 */ 2323 goto test_char; 2324 } 2325 /*NOTREACHED*/ 2326 break; 2327 2328 case ';': 2329 /* 2330 * Semi-colon: Need to see if it should be interpreted as a 2331 * newline 2332 */ 2333 if (semiNL) { 2334 /* 2335 * To make sure the command that may be following this 2336 * semi-colon begins with a tab, we push one back into the 2337 * input stream. This will overwrite the semi-colon in the 2338 * buffer. If there is no command following, this does no 2339 * harm, since the newline remains in the buffer and the 2340 * whole line is ignored. 2341 */ 2342 ParseUnreadc('\t'); 2343 goto line_read; 2344 } 2345 break; 2346 case '=': 2347 if (!semiNL) { 2348 /* 2349 * Haven't seen a dependency operator before this, so this 2350 * must be a variable assignment -- don't pay attention to 2351 * dependency operators after this. 2352 */ 2353 ignDepOp = TRUE; 2354 } else if (lastc == ':' || lastc == '!') { 2355 /* 2356 * Well, we've seen a dependency operator already, but it 2357 * was the previous character, so this is really just an 2358 * expanded variable assignment. Revert semi-colons to 2359 * being just semi-colons again and ignore any more 2360 * dependency operators. 2361 * 2362 * XXX: Note that a line like "foo : a:=b" will blow up, 2363 * but who'd write a line like that anyway? 2364 */ 2365 ignDepOp = TRUE; semiNL = FALSE; 2366 } 2367 break; 2368 case '#': 2369 if (!ignComment) { 2370 if ( 2371 #if 0 2372 compatMake && 2373 #endif 2374 (lastc != '\\')) { 2375 /* 2376 * If the character is a hash mark and it isn't escaped 2377 * (or we're being compatible), the thing is a comment. 2378 * Skip to the end of the line. 2379 */ 2380 do { 2381 c = ParseReadc(); 2382 } while ((c != '\n') && (c != EOF)); 2383 goto line_read; 2384 } else { 2385 /* 2386 * Don't add the backslash. Just let the # get copied 2387 * over. 2388 */ 2389 lastc = c; 2390 continue; 2391 } 2392 } 2393 break; 2394 case ':': 2395 case '!': 2396 if (!ignDepOp && (c == ':' || c == '!')) { 2397 /* 2398 * A semi-colon is recognized as a newline only on 2399 * dependency lines. Dependency lines are lines with a 2400 * colon or an exclamation point. Ergo... 2401 */ 2402 semiNL = TRUE; 2403 } 2404 break; 2405 } 2406 /* 2407 * Copy in the previous character and save this one in lastc. 2408 */ 2409 Buf_AddByte (buf, (Byte)lastc); 2410 lastc = c; 2411 2412 } 2413 line_read: 2414 lineno++; 2415 2416 if (lastc != '\0') { 2417 Buf_AddByte (buf, (Byte)lastc); 2418 } 2419 Buf_AddByte (buf, (Byte)'\0'); 2420 line = (char *)Buf_GetAll (buf, &lineLength); 2421 Buf_Destroy (buf, FALSE); 2422 2423 /* 2424 * Strip trailing blanks and tabs from the line. 2425 * Do not strip a blank or tab that is preceeded by 2426 * a '\' 2427 */ 2428 ep = line; 2429 while (*ep) 2430 ++ep; 2431 while (ep > line + 1 && (ep[-1] == ' ' || ep[-1] == '\t')) { 2432 if (ep > line + 1 && ep[-2] == '\\') 2433 break; 2434 --ep; 2435 } 2436 *ep = 0; 2437 2438 if (line[0] == '.') { 2439 /* 2440 * The line might be a conditional. Ask the conditional module 2441 * about it and act accordingly 2442 */ 2443 switch (Cond_Eval (line)) { 2444 case COND_SKIP: 2445 /* 2446 * Skip to next conditional that evaluates to COND_PARSE. 2447 */ 2448 do { 2449 free (line); 2450 line = ParseSkipLine(1); 2451 } while (line && Cond_Eval(line) != COND_PARSE); 2452 if (line == NULL) 2453 break; 2454 /*FALLTHRU*/ 2455 case COND_PARSE: 2456 free ((Address) line); 2457 line = ParseReadLine(); 2458 break; 2459 case COND_INVALID: 2460 if (For_Eval(line)) { 2461 int ok; 2462 free(line); 2463 do { 2464 /* 2465 * Skip after the matching end 2466 */ 2467 line = ParseSkipLine(0); 2468 if (line == NULL) { 2469 Parse_Error (PARSE_FATAL, 2470 "Unexpected end of file in for loop.\n"); 2471 break; 2472 } 2473 ok = For_Eval(line); 2474 free(line); 2475 } 2476 while (ok); 2477 if (line != NULL) 2478 For_Run(); 2479 line = ParseReadLine(); 2480 } 2481 break; 2482 } 2483 } 2484 return (line); 2485 2486 } else { 2487 /* 2488 * Hit end-of-file, so return a NULL line to indicate this. 2489 */ 2490 return((char *)NULL); 2491 } 2492 } 2493 2494 /*- 2495 *----------------------------------------------------------------------- 2496 * ParseFinishLine -- 2497 * Handle the end of a dependency group. 2498 * 2499 * Results: 2500 * Nothing. 2501 * 2502 * Side Effects: 2503 * inLine set FALSE. 'targets' list destroyed. 2504 * 2505 *----------------------------------------------------------------------- 2506 */ 2507 static void 2508 ParseFinishLine() 2509 { 2510 if (inLine) { 2511 Lst_ForEach(targets, Suff_EndTransform, (ClientData)NULL); 2512 Lst_Destroy (targets, ParseHasCommands); 2513 targets = NULL; 2514 inLine = FALSE; 2515 } 2516 } 2517 2518 2519 /*- 2520 *--------------------------------------------------------------------- 2521 * Parse_File -- 2522 * Parse a file into its component parts, incorporating it into the 2523 * current dependency graph. This is the main function and controls 2524 * almost every other function in this module 2525 * 2526 * Results: 2527 * None 2528 * 2529 * Side Effects: 2530 * Loads. Nodes are added to the list of all targets, nodes and links 2531 * are added to the dependency graph. etc. etc. etc. 2532 *--------------------------------------------------------------------- 2533 */ 2534 void 2535 Parse_File(name, stream) 2536 char *name; /* the name of the file being read */ 2537 FILE * stream; /* Stream open to makefile to parse */ 2538 { 2539 register char *cp, /* pointer into the line */ 2540 *line; /* the line we're working on */ 2541 2542 inLine = FALSE; 2543 fname = name; 2544 curFILE = stream; 2545 lineno = 0; 2546 fatals = 0; 2547 2548 ParseSetParseFile(fname); 2549 2550 do { 2551 while ((line = ParseReadLine ()) != NULL) { 2552 if (*line == '.') { 2553 /* 2554 * Lines that begin with the special character are either 2555 * include or undef directives. 2556 */ 2557 for (cp = line + 1; isspace ((unsigned char)*cp); cp++) { 2558 continue; 2559 } 2560 if (strncmp(cp, "include", 7) == 0 || 2561 ((cp[0] == 's' || cp[0] == '-') && 2562 strncmp(&cp[1], "include", 7) == 0)) { 2563 ParseDoInclude (cp); 2564 goto nextLine; 2565 } else if (strncmp(cp, "undef", 5) == 0) { 2566 char *cp2; 2567 for (cp += 5; isspace((unsigned char) *cp); cp++) { 2568 continue; 2569 } 2570 2571 for (cp2 = cp; !isspace((unsigned char) *cp2) && 2572 (*cp2 != '\0'); cp2++) { 2573 continue; 2574 } 2575 2576 *cp2 = '\0'; 2577 2578 Var_Delete(cp, VAR_GLOBAL); 2579 goto nextLine; 2580 } 2581 } 2582 if (*line == '#') { 2583 /* If we're this far, the line must be a comment. */ 2584 goto nextLine; 2585 } 2586 2587 if (*line == '\t') { 2588 /* 2589 * If a line starts with a tab, it can only hope to be 2590 * a creation command. 2591 */ 2592 #ifndef POSIX 2593 shellCommand: 2594 #endif 2595 for (cp = line + 1; isspace ((unsigned char)*cp); cp++) { 2596 continue; 2597 } 2598 if (*cp) { 2599 if (inLine) { 2600 /* 2601 * So long as it's not a blank line and we're actually 2602 * in a dependency spec, add the command to the list of 2603 * commands of all targets in the dependency spec 2604 */ 2605 Lst_ForEach (targets, ParseAddCmd, cp); 2606 #ifdef CLEANUP 2607 Lst_AtEnd(targCmds, (ClientData) line); 2608 #endif 2609 continue; 2610 } else { 2611 Parse_Error (PARSE_FATAL, 2612 "Unassociated shell command \"%s\"", 2613 cp); 2614 } 2615 } 2616 #ifdef SYSVINCLUDE 2617 } else if (((strncmp(line, "include", 7) == 0 && 2618 isspace((unsigned char) line[7])) || 2619 ((line[0] == 's' || line[0] == '-') && 2620 strncmp(&line[1], "include", 7) == 0 && 2621 isspace((unsigned char) line[8]))) && 2622 strchr(line, ':') == NULL) { 2623 /* 2624 * It's an S3/S5-style "include". 2625 */ 2626 ParseTraditionalInclude (line); 2627 goto nextLine; 2628 #endif 2629 } else if (Parse_IsVar (line)) { 2630 ParseFinishLine(); 2631 Parse_DoVar (line, VAR_GLOBAL); 2632 } else { 2633 /* 2634 * We now know it's a dependency line so it needs to have all 2635 * variables expanded before being parsed. Tell the variable 2636 * module to complain if some variable is undefined... 2637 * To make life easier on novices, if the line is indented we 2638 * first make sure the line has a dependency operator in it. 2639 * If it doesn't have an operator and we're in a dependency 2640 * line's script, we assume it's actually a shell command 2641 * and add it to the current list of targets. 2642 */ 2643 #ifndef POSIX 2644 Boolean nonSpace = FALSE; 2645 #endif 2646 2647 cp = line; 2648 if (isspace((unsigned char) line[0])) { 2649 while ((*cp != '\0') && isspace((unsigned char) *cp)) { 2650 cp++; 2651 } 2652 if (*cp == '\0') { 2653 goto nextLine; 2654 } 2655 #ifndef POSIX 2656 while ((*cp != ':') && (*cp != '!') && (*cp != '\0')) { 2657 nonSpace = TRUE; 2658 cp++; 2659 } 2660 #endif 2661 } 2662 2663 #ifndef POSIX 2664 if (*cp == '\0') { 2665 if (inLine) { 2666 Parse_Error (PARSE_WARNING, 2667 "Shell command needs a leading tab"); 2668 goto shellCommand; 2669 } else if (nonSpace) { 2670 Parse_Error (PARSE_FATAL, "Missing operator"); 2671 } 2672 } else { 2673 #endif 2674 ParseFinishLine(); 2675 2676 cp = Var_Subst (NULL, line, VAR_CMD, TRUE); 2677 free (line); 2678 line = cp; 2679 2680 /* 2681 * Need a non-circular list for the target nodes 2682 */ 2683 if (targets) 2684 Lst_Destroy(targets, NOFREE); 2685 2686 targets = Lst_Init (FALSE); 2687 inLine = TRUE; 2688 2689 ParseDoDependency (line); 2690 #ifndef POSIX 2691 } 2692 #endif 2693 } 2694 2695 nextLine: 2696 2697 free (line); 2698 } 2699 /* 2700 * Reached EOF, but it may be just EOF of an include file... 2701 */ 2702 } while (ParseEOF(1) == CONTINUE); 2703 2704 /* 2705 * Make sure conditionals are clean 2706 */ 2707 Cond_End(); 2708 2709 if (fatals) { 2710 fprintf (stderr, "Fatal errors encountered -- cannot continue\n"); 2711 exit (1); 2712 } 2713 } 2714 2715 /*- 2716 *--------------------------------------------------------------------- 2717 * Parse_Init -- 2718 * initialize the parsing module 2719 * 2720 * Results: 2721 * none 2722 * 2723 * Side Effects: 2724 * the parseIncPath list is initialized... 2725 *--------------------------------------------------------------------- 2726 */ 2727 void 2728 Parse_Init () 2729 { 2730 mainNode = NILGNODE; 2731 parseIncPath = Lst_Init (FALSE); 2732 sysIncPath = Lst_Init (FALSE); 2733 includes = Lst_Init (FALSE); 2734 #ifdef CLEANUP 2735 targCmds = Lst_Init (FALSE); 2736 #endif 2737 } 2738 2739 void 2740 Parse_End() 2741 { 2742 #ifdef CLEANUP 2743 Lst_Destroy(targCmds, (void (*) __P((ClientData))) free); 2744 if (targets) 2745 Lst_Destroy(targets, NOFREE); 2746 Lst_Destroy(sysIncPath, Dir_Destroy); 2747 Lst_Destroy(parseIncPath, Dir_Destroy); 2748 Lst_Destroy(includes, NOFREE); /* Should be empty now */ 2749 #endif 2750 } 2751 2752 2753 /*- 2754 *----------------------------------------------------------------------- 2755 * Parse_MainName -- 2756 * Return a Lst of the main target to create for main()'s sake. If 2757 * no such target exists, we Punt with an obnoxious error message. 2758 * 2759 * Results: 2760 * A Lst of the single node to create. 2761 * 2762 * Side Effects: 2763 * None. 2764 * 2765 *----------------------------------------------------------------------- 2766 */ 2767 Lst 2768 Parse_MainName() 2769 { 2770 Lst mainList; /* result list */ 2771 2772 mainList = Lst_Init (FALSE); 2773 2774 if (mainNode == NILGNODE) { 2775 Punt ("no target to make."); 2776 /*NOTREACHED*/ 2777 } else if (mainNode->type & OP_DOUBLEDEP) { 2778 (void) Lst_AtEnd (mainList, (ClientData)mainNode); 2779 Lst_Concat(mainList, mainNode->cohorts, LST_CONCNEW); 2780 } 2781 else 2782 (void) Lst_AtEnd (mainList, (ClientData)mainNode); 2783 return (mainList); 2784 } 2785 2786 /*- 2787 *----------------------------------------------------------------------- 2788 * ParseMark -- 2789 * Add the filename and lineno to the GNode so that we remember 2790 * where it was first defined. 2791 * 2792 * Side Effects: 2793 * None. 2794 * 2795 *----------------------------------------------------------------------- 2796 */ 2797 static void 2798 ParseMark(gn) 2799 GNode *gn; 2800 { 2801 gn->fname = strdup(fname); 2802 gn->lineno = lineno; 2803 } 2804