1 /* $NetBSD: parse.c,v 1.92 2003/03/23 22:48:35 sjg Exp $ */ 2 3 /* 4 * Copyright (c) 1988, 1989, 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * Copyright (c) 1989 by Berkeley Softworks 7 * All rights reserved. 8 * 9 * This code is derived from software contributed to Berkeley by 10 * Adam de Boor. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 */ 40 41 #ifdef MAKE_BOOTSTRAP 42 static char rcsid[] = "$NetBSD: parse.c,v 1.92 2003/03/23 22:48:35 sjg Exp $"; 43 #else 44 #include <sys/cdefs.h> 45 #ifndef lint 46 #if 0 47 static char sccsid[] = "@(#)parse.c 8.3 (Berkeley) 3/19/94"; 48 #else 49 __RCSID("$NetBSD: parse.c,v 1.92 2003/03/23 22:48:35 sjg Exp $"); 50 #endif 51 #endif /* not lint */ 52 #endif 53 54 /*- 55 * parse.c -- 56 * Functions to parse a makefile. 57 * 58 * One function, Parse_Init, must be called before any functions 59 * in this module are used. After that, the function Parse_File is the 60 * main entry point and controls most of the other functions in this 61 * module. 62 * 63 * Most important structures are kept in Lsts. Directories for 64 * the #include "..." function are kept in the 'parseIncPath' Lst, while 65 * those for the #include <...> are kept in the 'sysIncPath' Lst. The 66 * targets currently being defined are kept in the 'targets' Lst. 67 * 68 * The variables 'fname' and 'lineno' are used to track the name 69 * of the current file and the line number in that file so that error 70 * messages can be more meaningful. 71 * 72 * Interface: 73 * Parse_Init Initialization function which must be 74 * called before anything else in this module 75 * is used. 76 * 77 * Parse_End Cleanup the module 78 * 79 * Parse_File Function used to parse a makefile. It must 80 * be given the name of the file, which should 81 * already have been opened, and a function 82 * to call to read a character from the file. 83 * 84 * Parse_IsVar Returns TRUE if the given line is a 85 * variable assignment. Used by MainParseArgs 86 * to determine if an argument is a target 87 * or a variable assignment. Used internally 88 * for pretty much the same thing... 89 * 90 * Parse_Error Function called when an error occurs in 91 * parsing. Used by the variable and 92 * conditional modules. 93 * Parse_MainName Returns a Lst of the main target to create. 94 */ 95 96 #include <ctype.h> 97 #include <errno.h> 98 #include <stdarg.h> 99 #include <stdio.h> 100 101 #include "make.h" 102 #include "hash.h" 103 #include "dir.h" 104 #include "job.h" 105 #include "buf.h" 106 #include "pathnames.h" 107 108 /* 109 * These values are returned by ParseEOF to tell Parse_File whether to 110 * CONTINUE parsing, i.e. it had only reached the end of an include file, 111 * or if it's DONE. 112 */ 113 #define CONTINUE 1 114 #define DONE 0 115 static Lst targets; /* targets we're working on */ 116 #ifdef CLEANUP 117 static Lst targCmds; /* command lines for targets */ 118 #endif 119 static Boolean inLine; /* true if currently in a dependency 120 * line or its commands */ 121 typedef struct { 122 char *str; 123 char *ptr; 124 } PTR; 125 126 static int fatals = 0; 127 128 static GNode *mainNode; /* The main target to create. This is the 129 * first target on the first dependency 130 * line in the first makefile */ 131 typedef struct IFile { 132 char *fname; /* name of previous file */ 133 int lineno; /* saved line number */ 134 FILE * F; /* the open stream */ 135 PTR * P; /* the char pointer */ 136 } IFile; 137 138 static IFile curFile; 139 140 141 /* 142 * Definitions for handling #include specifications 143 */ 144 145 static Lst includes; /* stack of IFiles generated by 146 * #includes */ 147 Lst parseIncPath; /* list of directories for "..." includes */ 148 Lst sysIncPath; /* list of directories for <...> includes */ 149 Lst defIncPath; /* default directories for <...> includes */ 150 151 /*- 152 * specType contains the SPECial TYPE of the current target. It is 153 * Not if the target is unspecial. If it *is* special, however, the children 154 * are linked as children of the parent but not vice versa. This variable is 155 * set in ParseDoDependency 156 */ 157 typedef enum { 158 Begin, /* .BEGIN */ 159 Default, /* .DEFAULT */ 160 End, /* .END */ 161 Ignore, /* .IGNORE */ 162 Includes, /* .INCLUDES */ 163 Interrupt, /* .INTERRUPT */ 164 Libs, /* .LIBS */ 165 MFlags, /* .MFLAGS or .MAKEFLAGS */ 166 Main, /* .MAIN and we don't have anything user-specified to 167 * make */ 168 NoExport, /* .NOEXPORT */ 169 NoPath, /* .NOPATH */ 170 Not, /* Not special */ 171 NotParallel, /* .NOTPARALLEL */ 172 Null, /* .NULL */ 173 ExObjdir, /* .OBJDIR */ 174 Order, /* .ORDER */ 175 Parallel, /* .PARALLEL */ 176 ExPath, /* .PATH */ 177 Phony, /* .PHONY */ 178 #ifdef POSIX 179 Posix, /* .POSIX */ 180 #endif 181 Precious, /* .PRECIOUS */ 182 ExShell, /* .SHELL */ 183 Silent, /* .SILENT */ 184 SingleShell, /* .SINGLESHELL */ 185 Suffixes, /* .SUFFIXES */ 186 Wait, /* .WAIT */ 187 Attribute /* Generic attribute */ 188 } ParseSpecial; 189 190 static ParseSpecial specType; 191 static int waiting; 192 193 #define LPAREN '(' 194 #define RPAREN ')' 195 /* 196 * Predecessor node for handling .ORDER. Initialized to NILGNODE when .ORDER 197 * seen, then set to each successive source on the line. 198 */ 199 static GNode *predecessor; 200 201 /* 202 * The parseKeywords table is searched using binary search when deciding 203 * if a target or source is special. The 'spec' field is the ParseSpecial 204 * type of the keyword ("Not" if the keyword isn't special as a target) while 205 * the 'op' field is the operator to apply to the list of targets if the 206 * keyword is used as a source ("0" if the keyword isn't special as a source) 207 */ 208 static struct { 209 char *name; /* Name of keyword */ 210 ParseSpecial spec; /* Type when used as a target */ 211 int op; /* Operator when used as a source */ 212 } parseKeywords[] = { 213 { ".BEGIN", Begin, 0 }, 214 { ".DEFAULT", Default, 0 }, 215 { ".END", End, 0 }, 216 { ".EXEC", Attribute, OP_EXEC }, 217 { ".IGNORE", Ignore, OP_IGNORE }, 218 { ".INCLUDES", Includes, 0 }, 219 { ".INTERRUPT", Interrupt, 0 }, 220 { ".INVISIBLE", Attribute, OP_INVISIBLE }, 221 { ".JOIN", Attribute, OP_JOIN }, 222 { ".LIBS", Libs, 0 }, 223 { ".MADE", Attribute, OP_MADE }, 224 { ".MAIN", Main, 0 }, 225 { ".MAKE", Attribute, OP_MAKE }, 226 { ".MAKEFLAGS", MFlags, 0 }, 227 { ".MFLAGS", MFlags, 0 }, 228 { ".NOPATH", NoPath, OP_NOPATH }, 229 { ".NOTMAIN", Attribute, OP_NOTMAIN }, 230 { ".NOTPARALLEL", NotParallel, 0 }, 231 { ".NO_PARALLEL", NotParallel, 0 }, 232 { ".NULL", Null, 0 }, 233 { ".OBJDIR", ExObjdir, 0 }, 234 { ".OPTIONAL", Attribute, OP_OPTIONAL }, 235 { ".ORDER", Order, 0 }, 236 { ".PARALLEL", Parallel, 0 }, 237 { ".PATH", ExPath, 0 }, 238 { ".PHONY", Phony, OP_PHONY }, 239 #ifdef POSIX 240 { ".POSIX", Posix, 0 }, 241 #endif 242 { ".PRECIOUS", Precious, OP_PRECIOUS }, 243 { ".RECURSIVE", Attribute, OP_MAKE }, 244 { ".SHELL", ExShell, 0 }, 245 { ".SILENT", Silent, OP_SILENT }, 246 { ".SINGLESHELL", SingleShell, 0 }, 247 { ".SUFFIXES", Suffixes, 0 }, 248 { ".USE", Attribute, OP_USE }, 249 { ".USEBEFORE", Attribute, OP_USEBEFORE }, 250 { ".WAIT", Wait, 0 }, 251 }; 252 253 /* 254 * Used by ParseDoSpecialSrc() 255 */ 256 typedef struct { 257 int op; 258 char *src; 259 Lst allsrc; 260 } SpecialSrc; 261 262 static int ParseIsEscaped(const char *, const char *); 263 static void ParseErrorInternal(char *, size_t, int, char *, ...) 264 __attribute__((__format__(__printf__, 4, 5))); 265 static void ParseVErrorInternal(char *, size_t, int, char *, va_list) 266 __attribute__((__format__(__printf__, 4, 0))); 267 static int ParseFindKeyword(char *); 268 static int ParseLinkSrc(ClientData, ClientData); 269 static int ParseDoOp(ClientData, ClientData); 270 static int ParseAddDep(ClientData, ClientData); 271 static int ParseDoSpecialSrc(ClientData, ClientData); 272 static void ParseDoSrc(int, char *, Lst, Boolean); 273 static int ParseFindMain(ClientData, ClientData); 274 static int ParseAddDir(ClientData, ClientData); 275 static int ParseClearPath(ClientData, ClientData); 276 static void ParseDoDependency(char *); 277 static int ParseAddCmd(ClientData, ClientData); 278 static __inline int ParseReadc(void); 279 static void ParseUnreadc(int); 280 static void ParseHasCommands(ClientData); 281 static void ParseDoInclude(char *); 282 static void ParseSetParseFile(char *); 283 #ifdef SYSVINCLUDE 284 static void ParseTraditionalInclude(char *); 285 #endif 286 static int ParseEOF(int); 287 static char *ParseReadLine(void); 288 static char *ParseSkipLine(int); 289 static void ParseFinishLine(void); 290 static void ParseMark(GNode *); 291 292 extern int maxJobs; 293 294 295 /*- 296 *---------------------------------------------------------------------- 297 * ParseIsEscaped -- 298 * Check if the current character is escaped on the current line 299 * 300 * Results: 301 * 0 if the character is not backslash escaped, 1 otherwise 302 * 303 * Side Effects: 304 * None 305 *---------------------------------------------------------------------- 306 */ 307 static int 308 ParseIsEscaped(const char *line, const char *c) 309 { 310 int active = 0; 311 for (;;) { 312 if (line == c) 313 return active; 314 if (*--c != '\\') 315 return active; 316 active = !active; 317 } 318 } 319 320 /*- 321 *---------------------------------------------------------------------- 322 * ParseFindKeyword -- 323 * Look in the table of keywords for one matching the given string. 324 * 325 * Input: 326 * str String to find 327 * 328 * Results: 329 * The index of the keyword, or -1 if it isn't there. 330 * 331 * Side Effects: 332 * None 333 *---------------------------------------------------------------------- 334 */ 335 static int 336 ParseFindKeyword(char *str) 337 { 338 int start, end, cur; 339 int diff; 340 341 start = 0; 342 end = (sizeof(parseKeywords)/sizeof(parseKeywords[0])) - 1; 343 344 do { 345 cur = start + ((end - start) / 2); 346 diff = strcmp (str, parseKeywords[cur].name); 347 348 if (diff == 0) { 349 return (cur); 350 } else if (diff < 0) { 351 end = cur - 1; 352 } else { 353 start = cur + 1; 354 } 355 } while (start <= end); 356 return (-1); 357 } 358 359 /*- 360 * ParseVErrorInternal -- 361 * Error message abort function for parsing. Prints out the context 362 * of the error (line number and file) as well as the message with 363 * two optional arguments. 364 * 365 * Results: 366 * None 367 * 368 * Side Effects: 369 * "fatals" is incremented if the level is PARSE_FATAL. 370 */ 371 /* VARARGS */ 372 static void 373 ParseVErrorInternal(char *cfname, size_t clineno, int type, char *fmt, 374 va_list ap) 375 { 376 static Boolean fatal_warning_error_printed = FALSE; 377 378 (void)fprintf(stderr, "%s: \"", progname); 379 380 if (*cfname != '/') { 381 char *cp, *dir; 382 383 /* 384 * Nothing is more anoying than not knowing which Makefile 385 * is the culprit. 386 */ 387 dir = Var_Value(".PARSEDIR", VAR_GLOBAL, &cp); 388 if (dir == NULL || *dir == '\0' || 389 (*dir == '.' && dir[1] == '\0')) 390 dir = Var_Value(".CURDIR", VAR_GLOBAL, &cp); 391 if (dir == NULL) 392 dir = "."; 393 394 (void)fprintf(stderr, "%s/%s", dir, cfname); 395 } else 396 (void)fprintf(stderr, "%s", cfname); 397 398 (void)fprintf(stderr, "\" line %d: ", (int)clineno); 399 if (type == PARSE_WARNING) 400 (void)fprintf(stderr, "warning: "); 401 (void)vfprintf(stderr, fmt, ap); 402 (void)fprintf(stderr, "\n"); 403 (void)fflush(stderr); 404 if (type == PARSE_FATAL || parseWarnFatal) 405 fatals += 1; 406 if (parseWarnFatal && !fatal_warning_error_printed) { 407 Error("parsing warnings being treated as errors"); 408 fatal_warning_error_printed = TRUE; 409 } 410 } 411 412 /*- 413 * ParseErrorInternal -- 414 * Error function 415 * 416 * Results: 417 * None 418 * 419 * Side Effects: 420 * None 421 */ 422 /* VARARGS */ 423 static void 424 ParseErrorInternal(char *cfname, size_t clineno, int type, char *fmt, ...) 425 { 426 va_list ap; 427 428 va_start(ap, fmt); 429 ParseVErrorInternal(cfname, clineno, type, fmt, ap); 430 va_end(ap); 431 } 432 433 /*- 434 * Parse_Error -- 435 * External interface to ParseErrorInternal; uses the default filename 436 * Line number. 437 * 438 * Results: 439 * None 440 * 441 * Side Effects: 442 * None 443 */ 444 /* VARARGS */ 445 void 446 Parse_Error(int type, char *fmt, ...) 447 { 448 va_list ap; 449 450 va_start(ap, fmt); 451 ParseVErrorInternal(curFile.fname, curFile.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 * Input: 463 * pgnp The parent node 464 * cgpn The child node 465 * 466 * Results: 467 * Always = 0 468 * 469 * Side Effects: 470 * New elements are added to the parents list of cgn and the 471 * children list of cgn. the unmade field of pgn is updated 472 * to reflect the additional child. 473 *--------------------------------------------------------------------- 474 */ 475 static int 476 ParseLinkSrc(ClientData pgnp, ClientData cgnp) 477 { 478 GNode *pgn = (GNode *) pgnp; 479 GNode *cgn = (GNode *) cgnp; 480 481 if ((pgn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (pgn->cohorts)) 482 pgn = (GNode *) Lst_Datum (Lst_Last (pgn->cohorts)); 483 (void)Lst_AtEnd (pgn->children, (ClientData)cgn); 484 if (specType == Not) 485 (void)Lst_AtEnd (cgn->parents, (ClientData)pgn); 486 pgn->unmade += 1; 487 return (0); 488 } 489 490 /*- 491 *--------------------------------------------------------------------- 492 * ParseDoOp -- 493 * Apply the parsed operator to the given target node. Used in a 494 * Lst_ForEach call by ParseDoDependency once all targets have 495 * been found and their operator parsed. If the previous and new 496 * operators are incompatible, a major error is taken. 497 * 498 * Input: 499 * gnp The node to which the operator is to be applied 500 * opp The operator to apply 501 * 502 * Results: 503 * Always 0 504 * 505 * Side Effects: 506 * The type field of the node is altered to reflect any new bits in 507 * the op. 508 *--------------------------------------------------------------------- 509 */ 510 static int 511 ParseDoOp(ClientData gnp, ClientData opp) 512 { 513 GNode *gn = (GNode *) gnp; 514 int op = *(int *) opp; 515 /* 516 * If the dependency mask of the operator and the node don't match and 517 * the node has actually had an operator applied to it before, and 518 * the operator actually has some dependency information in it, complain. 519 */ 520 if (((op & OP_OPMASK) != (gn->type & OP_OPMASK)) && 521 !OP_NOP(gn->type) && !OP_NOP(op)) 522 { 523 Parse_Error (PARSE_FATAL, "Inconsistent operator for %s", gn->name); 524 return (1); 525 } 526 527 if ((op == OP_DOUBLEDEP) && ((gn->type & OP_OPMASK) == OP_DOUBLEDEP)) { 528 /* 529 * If the node was the object of a :: operator, we need to create a 530 * new instance of it for the children and commands on this dependency 531 * line. The new instance is placed on the 'cohorts' list of the 532 * initial one (note the initial one is not on its own cohorts list) 533 * and the new instance is linked to all parents of the initial 534 * instance. 535 */ 536 GNode *cohort; 537 538 /* 539 * Propagate copied bits to the initial node. They'll be propagated 540 * back to the rest of the cohorts later. 541 */ 542 gn->type |= op & ~OP_OPMASK; 543 544 cohort = Targ_NewGN(gn->name); 545 /* 546 * Make the cohort invisible as well to avoid duplicating it into 547 * other variables. True, parents of this target won't tend to do 548 * anything with their local variables, but better safe than 549 * sorry. (I think this is pointless now, since the relevant list 550 * traversals will no longer see this node anyway. -mycroft) 551 */ 552 cohort->type = op | OP_INVISIBLE; 553 (void)Lst_AtEnd(gn->cohorts, (ClientData)cohort); 554 cohort->centurion = gn; 555 gn->unmade_cohorts += 1; 556 } else { 557 /* 558 * We don't want to nuke any previous flags (whatever they were) so we 559 * just OR the new operator into the old 560 */ 561 gn->type |= op; 562 } 563 564 return (0); 565 } 566 567 /*- 568 *--------------------------------------------------------------------- 569 * ParseAddDep -- 570 * Check if the pair of GNodes given needs to be synchronized. 571 * This has to be when two nodes are on different sides of a 572 * .WAIT directive. 573 * 574 * Results: 575 * Returns 1 if the two targets need to be ordered, 0 otherwise. 576 * If it returns 1, the search can stop 577 * 578 * Side Effects: 579 * A dependency can be added between the two nodes. 580 * 581 *--------------------------------------------------------------------- 582 */ 583 static int 584 ParseAddDep(ClientData pp, ClientData sp) 585 { 586 GNode *p = (GNode *) pp; 587 GNode *s = (GNode *) sp; 588 589 if (p->order < s->order) { 590 /* 591 * XXX: This can cause loops, and loops can cause unmade targets, 592 * but checking is tedious, and the debugging output can show the 593 * problem 594 */ 595 (void)Lst_AtEnd(p->successors, (ClientData)s); 596 (void)Lst_AtEnd(s->preds, (ClientData)p); 597 return 0; 598 } 599 else 600 return 1; 601 } 602 603 /* - 604 *--------------------------------------------------------------------- 605 * ParseDoSpecialSrc -- 606 * ParseDoSrc struck an unexpanded variable in a src. 607 * The most likely reason is a src that refers to .TARGET or 608 * .PREFIX so we get called to set those for each target 609 * and then call ParseDoSrc again to do the real work. 610 * 611 * Input: 612 * tp A target GNode * 613 * sp A SpecialSrc * which contains the args we need 614 * for ParseDoSrc. 615 * 616 * Results: 617 * Goodness 618 * 619 * Side Effects: 620 * The target GNode will have .TARGET and .PREFIX set, this seems 621 * harmless. 622 */ 623 static int 624 ParseDoSpecialSrc(ClientData tp, ClientData sp) 625 { 626 GNode *tn = (GNode *) tp; 627 GNode *gn; 628 SpecialSrc *ss = (SpecialSrc *) sp; 629 char *cp; 630 char *cp2; 631 char *pref; 632 633 /* 634 * If the target is a suffix rule, leave it alone. 635 */ 636 if (Suff_IsTransform(tn->name)) { 637 ParseDoSrc(ss->op, ss->src, ss->allsrc, FALSE); /* don't come back */ 638 return 0; 639 } 640 Var_Set(TARGET, tn->name, tn, 0); 641 if ((pref = strrchr(tn->name, '/'))) 642 pref++; 643 else 644 pref = tn->name; 645 if ((cp2 = strchr(pref, '.')) > pref) { 646 cp = estrdup(pref); 647 cp[cp2 - pref] = '\0'; 648 Var_Set(PREFIX, cp, tn, 0); 649 free(cp); 650 } else 651 Var_Set(PREFIX, pref, tn, 0); 652 cp = Var_Subst(NULL, ss->src, tn, FALSE); 653 if (strchr(cp, '$')) { 654 Parse_Error(PARSE_WARNING, "Cannot resolve '%s' here", ss->src); 655 ParseDoSrc(ss->op, ss->src, ss->allsrc, FALSE); /* don't come back */ 656 return 1; /* stop list traversal */ 657 } 658 /* 659 * We don't want to make every target dependent on sources for 660 * other targets. This is the bit of ParseDoSrc which is relevant. 661 * The main difference is we don't link the resolved src to all targets. 662 */ 663 gn = Targ_FindNode (cp, TARG_CREATE); 664 if (ss->op) { 665 gn->type |= ss->op; 666 } else { 667 ParseLinkSrc((ClientData)tn, (ClientData)gn); 668 } 669 gn->order = waiting; 670 (void)Lst_AtEnd(ss->allsrc, (ClientData)gn); 671 if (waiting) { 672 Lst_ForEach(ss->allsrc, ParseAddDep, (ClientData)gn); 673 } 674 return 0; 675 } 676 677 678 /*- 679 *--------------------------------------------------------------------- 680 * ParseDoSrc -- 681 * Given the name of a source, figure out if it is an attribute 682 * and apply it to the targets if it is. Else decide if there is 683 * some attribute which should be applied *to* the source because 684 * of some special target and apply it if so. Otherwise, make the 685 * source be a child of the targets in the list 'targets' 686 * 687 * Input: 688 * tOp operator (if any) from special targets 689 * src name of the source to handle 690 * allsrc List of all sources to wait for 691 * resolve boolean - should we try and resolve .TARGET refs. 692 * 693 * Results: 694 * None 695 * 696 * Side Effects: 697 * Operator bits may be added to the list of targets or to the source. 698 * The targets may have a new source added to their lists of children. 699 *--------------------------------------------------------------------- 700 */ 701 static void 702 ParseDoSrc(int tOp, char *src, Lst allsrc, Boolean resolve) 703 { 704 GNode *gn = NULL; 705 706 if (*src == '.' && isupper ((unsigned char)src[1])) { 707 int keywd = ParseFindKeyword(src); 708 if (keywd != -1) { 709 int op = parseKeywords[keywd].op; 710 if (op != 0) { 711 Lst_ForEach (targets, ParseDoOp, (ClientData)&op); 712 return; 713 } 714 if (parseKeywords[keywd].spec == Wait) { 715 waiting++; 716 return; 717 } 718 } 719 } 720 721 switch (specType) { 722 case Main: 723 /* 724 * If we have noted the existence of a .MAIN, it means we need 725 * to add the sources of said target to the list of things 726 * to create. The string 'src' is likely to be free, so we 727 * must make a new copy of it. Note that this will only be 728 * invoked if the user didn't specify a target on the command 729 * line. This is to allow #ifmake's to succeed, or something... 730 */ 731 (void) Lst_AtEnd (create, (ClientData)estrdup(src)); 732 /* 733 * Add the name to the .TARGETS variable as well, so the user cna 734 * employ that, if desired. 735 */ 736 Var_Append(".TARGETS", src, VAR_GLOBAL); 737 return; 738 739 case Order: 740 /* 741 * Create proper predecessor/successor links between the previous 742 * source and the current one. 743 */ 744 gn = Targ_FindNode(src, TARG_CREATE); 745 if (predecessor != NILGNODE) { 746 (void)Lst_AtEnd(predecessor->successors, (ClientData)gn); 747 (void)Lst_AtEnd(gn->preds, (ClientData)predecessor); 748 } 749 /* 750 * The current source now becomes the predecessor for the next one. 751 */ 752 predecessor = gn; 753 break; 754 755 default: 756 /* 757 * If the source is not an attribute, we need to find/create 758 * a node for it. After that we can apply any operator to it 759 * from a special target or link it to its parents, as 760 * appropriate. 761 * 762 * In the case of a source that was the object of a :: operator, 763 * the attribute is applied to all of its instances (as kept in 764 * the 'cohorts' list of the node) or all the cohorts are linked 765 * to all the targets. 766 */ 767 if (resolve && strchr(src, '$')) { 768 SpecialSrc ss; 769 770 ss.op = tOp; 771 ss.src = src; 772 ss.allsrc = allsrc; 773 774 /* 775 * If src cannot be fully resolved, we'll be called again 776 * with resolve==FALSE. 777 */ 778 Lst_ForEach(targets, ParseDoSpecialSrc, (ClientData)&ss); 779 return; 780 } 781 gn = Targ_FindNode (src, TARG_CREATE); 782 if (tOp) { 783 gn->type |= tOp; 784 } else { 785 Lst_ForEach (targets, ParseLinkSrc, (ClientData)gn); 786 } 787 break; 788 } 789 790 gn->order = waiting; 791 (void)Lst_AtEnd(allsrc, (ClientData)gn); 792 if (waiting) { 793 Lst_ForEach(allsrc, ParseAddDep, (ClientData)gn); 794 } 795 } 796 797 /*- 798 *----------------------------------------------------------------------- 799 * ParseFindMain -- 800 * Find a real target in the list and set it to be the main one. 801 * Called by ParseDoDependency when a main target hasn't been found 802 * yet. 803 * 804 * Input: 805 * gnp Node to examine 806 * 807 * Results: 808 * 0 if main not found yet, 1 if it is. 809 * 810 * Side Effects: 811 * mainNode is changed and Targ_SetMain is called. 812 * 813 *----------------------------------------------------------------------- 814 */ 815 static int 816 ParseFindMain(ClientData gnp, ClientData dummy) 817 { 818 GNode *gn = (GNode *) gnp; 819 if ((gn->type & OP_NOTARGET) == 0) { 820 mainNode = gn; 821 Targ_SetMain(gn); 822 return (dummy ? 1 : 1); 823 } else { 824 return (dummy ? 0 : 0); 825 } 826 } 827 828 /*- 829 *----------------------------------------------------------------------- 830 * ParseAddDir -- 831 * Front-end for Dir_AddDir to make sure Lst_ForEach keeps going 832 * 833 * Results: 834 * === 0 835 * 836 * Side Effects: 837 * See Dir_AddDir. 838 * 839 *----------------------------------------------------------------------- 840 */ 841 static int 842 ParseAddDir(ClientData path, ClientData name) 843 { 844 (void) Dir_AddDir((Lst) path, (char *) name); 845 return(0); 846 } 847 848 /*- 849 *----------------------------------------------------------------------- 850 * ParseClearPath -- 851 * Front-end for Dir_ClearPath to make sure Lst_ForEach keeps going 852 * 853 * Results: 854 * === 0 855 * 856 * Side Effects: 857 * See Dir_ClearPath 858 * 859 *----------------------------------------------------------------------- 860 */ 861 static int 862 ParseClearPath(ClientData path, ClientData dummy) 863 { 864 Dir_ClearPath((Lst) path); 865 return(dummy ? 0 : 0); 866 } 867 868 /*- 869 *--------------------------------------------------------------------- 870 * ParseDoDependency -- 871 * Parse the dependency line in line. 872 * 873 * Input: 874 * line the line to parse 875 * 876 * Results: 877 * None 878 * 879 * Side Effects: 880 * The nodes of the sources are linked as children to the nodes of the 881 * targets. Some nodes may be created. 882 * 883 * We parse a dependency line by first extracting words from the line and 884 * finding nodes in the list of all targets with that name. This is done 885 * until a character is encountered which is an operator character. Currently 886 * these are only ! and :. At this point the operator is parsed and the 887 * pointer into the line advanced until the first source is encountered. 888 * The parsed operator is applied to each node in the 'targets' list, 889 * which is where the nodes found for the targets are kept, by means of 890 * the ParseDoOp function. 891 * The sources are read in much the same way as the targets were except 892 * that now they are expanded using the wildcarding scheme of the C-Shell 893 * and all instances of the resulting words in the list of all targets 894 * are found. Each of the resulting nodes is then linked to each of the 895 * targets as one of its children. 896 * Certain targets are handled specially. These are the ones detailed 897 * by the specType variable. 898 * The storing of transformation rules is also taken care of here. 899 * A target is recognized as a transformation rule by calling 900 * Suff_IsTransform. If it is a transformation rule, its node is gotten 901 * from the suffix module via Suff_AddTransform rather than the standard 902 * Targ_FindNode in the target module. 903 *--------------------------------------------------------------------- 904 */ 905 static void 906 ParseDoDependency(char *line) 907 { 908 char *cp; /* our current position */ 909 GNode *gn; /* a general purpose temporary node */ 910 int op; /* the operator on the line */ 911 char savec; /* a place to save a character */ 912 Lst paths; /* List of search paths to alter when parsing 913 * a list of .PATH targets */ 914 int tOp; /* operator from special target */ 915 Lst sources; /* list of archive source names after 916 * expansion */ 917 Lst curTargs; /* list of target names to be found and added 918 * to the targets list */ 919 Lst curSrcs; /* list of sources in order */ 920 char *lstart = line; 921 Boolean hasWait; /* is .WAIT present in srcs */ 922 923 tOp = 0; 924 925 specType = Not; 926 waiting = 0; 927 paths = (Lst)NULL; 928 929 curTargs = Lst_Init(FALSE); 930 curSrcs = Lst_Init(FALSE); 931 932 do { 933 for (cp = line; 934 *cp && (ParseIsEscaped(lstart, cp) || 935 (!isspace ((unsigned char)*cp) && 936 (*cp != '!') && (*cp != ':') && (*cp != LPAREN))); 937 cp++) 938 { 939 if (*cp == '$') { 940 /* 941 * Must be a dynamic source (would have been expanded 942 * otherwise), so call the Var module to parse the puppy 943 * so we can safely advance beyond it...There should be 944 * no errors in this, as they would have been discovered 945 * in the initial Var_Subst and we wouldn't be here. 946 */ 947 int length; 948 Boolean freeIt; 949 char *result; 950 951 result=Var_Parse(cp, VAR_CMD, TRUE, &length, &freeIt); 952 953 if (freeIt) { 954 free(result); 955 } 956 cp += length-1; 957 } 958 continue; 959 } 960 if (!ParseIsEscaped(lstart, cp) && *cp == LPAREN) { 961 /* 962 * Archives must be handled specially to make sure the OP_ARCHV 963 * flag is set in their 'type' field, for one thing, and because 964 * things like "archive(file1.o file2.o file3.o)" are permissible. 965 * Arch_ParseArchive will set 'line' to be the first non-blank 966 * after the archive-spec. It creates/finds nodes for the members 967 * and places them on the given list, returning SUCCESS if all 968 * went well and FAILURE if there was an error in the 969 * specification. On error, line should remain untouched. 970 */ 971 if (Arch_ParseArchive (&line, targets, VAR_CMD) != SUCCESS) { 972 Parse_Error (PARSE_FATAL, 973 "Error in archive specification: \"%s\"", line); 974 return; 975 } else { 976 continue; 977 } 978 } 979 savec = *cp; 980 981 if (!*cp) { 982 /* 983 * Ending a dependency line without an operator is a Bozo 984 * no-no. As a heuristic, this is also often triggered by 985 * undetected conflicts from cvs/rcs merges. 986 */ 987 if ((strncmp(line, "<<<<<<", 6) == 0) || 988 (strncmp(line, "======", 6) == 0) || 989 (strncmp(line, ">>>>>>", 6) == 0)) 990 Parse_Error (PARSE_FATAL, 991 "Makefile appears to contain unresolved cvs/rcs/??? merge conflicts"); 992 else 993 Parse_Error (PARSE_FATAL, "Need an operator"); 994 return; 995 } 996 *cp = '\0'; 997 /* 998 * Have a word in line. See if it's a special target and set 999 * specType to match it. 1000 */ 1001 if (*line == '.' && isupper ((unsigned char)line[1])) { 1002 /* 1003 * See if the target is a special target that must have it 1004 * or its sources handled specially. 1005 */ 1006 int keywd = ParseFindKeyword(line); 1007 if (keywd != -1) { 1008 if (specType == ExPath && parseKeywords[keywd].spec != ExPath) { 1009 Parse_Error(PARSE_FATAL, "Mismatched special targets"); 1010 return; 1011 } 1012 1013 specType = parseKeywords[keywd].spec; 1014 tOp = parseKeywords[keywd].op; 1015 1016 /* 1017 * Certain special targets have special semantics: 1018 * .PATH Have to set the dirSearchPath 1019 * variable too 1020 * .MAIN Its sources are only used if 1021 * nothing has been specified to 1022 * create. 1023 * .DEFAULT Need to create a node to hang 1024 * commands on, but we don't want 1025 * it in the graph, nor do we want 1026 * it to be the Main Target, so we 1027 * create it, set OP_NOTMAIN and 1028 * add it to the list, setting 1029 * DEFAULT to the new node for 1030 * later use. We claim the node is 1031 * A transformation rule to make 1032 * life easier later, when we'll 1033 * use Make_HandleUse to actually 1034 * apply the .DEFAULT commands. 1035 * .PHONY The list of targets 1036 * .NOPATH Don't search for file in the path 1037 * .BEGIN 1038 * .END 1039 * .INTERRUPT Are not to be considered the 1040 * main target. 1041 * .NOTPARALLEL Make only one target at a time. 1042 * .SINGLESHELL Create a shell for each command. 1043 * .ORDER Must set initial predecessor to NIL 1044 */ 1045 switch (specType) { 1046 case ExPath: 1047 if (paths == NULL) { 1048 paths = Lst_Init(FALSE); 1049 } 1050 (void)Lst_AtEnd(paths, (ClientData)dirSearchPath); 1051 break; 1052 case Main: 1053 if (!Lst_IsEmpty(create)) { 1054 specType = Not; 1055 } 1056 break; 1057 case Begin: 1058 case End: 1059 case Interrupt: 1060 gn = Targ_FindNode(line, TARG_CREATE); 1061 gn->type |= OP_NOTMAIN; 1062 (void)Lst_AtEnd(targets, (ClientData)gn); 1063 break; 1064 case Default: 1065 gn = Targ_NewGN(".DEFAULT"); 1066 gn->type |= (OP_NOTMAIN|OP_TRANSFORM); 1067 (void)Lst_AtEnd(targets, (ClientData)gn); 1068 DEFAULT = gn; 1069 break; 1070 case NotParallel: 1071 { 1072 maxJobs = 1; 1073 break; 1074 } 1075 case SingleShell: 1076 compatMake = TRUE; 1077 break; 1078 case Order: 1079 predecessor = NILGNODE; 1080 break; 1081 default: 1082 break; 1083 } 1084 } else if (strncmp (line, ".PATH", 5) == 0) { 1085 /* 1086 * .PATH<suffix> has to be handled specially. 1087 * Call on the suffix module to give us a path to 1088 * modify. 1089 */ 1090 Lst path; 1091 1092 specType = ExPath; 1093 path = Suff_GetPath (&line[5]); 1094 if (path == NILLST) { 1095 Parse_Error (PARSE_FATAL, 1096 "Suffix '%s' not defined (yet)", 1097 &line[5]); 1098 return; 1099 } else { 1100 if (paths == (Lst)NULL) { 1101 paths = Lst_Init(FALSE); 1102 } 1103 (void)Lst_AtEnd(paths, (ClientData)path); 1104 } 1105 } 1106 } 1107 1108 /* 1109 * Have word in line. Get or create its node and stick it at 1110 * the end of the targets list 1111 */ 1112 if ((specType == Not) && (*line != '\0')) { 1113 if (Dir_HasWildcards(line)) { 1114 /* 1115 * Targets are to be sought only in the current directory, 1116 * so create an empty path for the thing. Note we need to 1117 * use Dir_Destroy in the destruction of the path as the 1118 * Dir module could have added a directory to the path... 1119 */ 1120 Lst emptyPath = Lst_Init(FALSE); 1121 1122 Dir_Expand(line, emptyPath, curTargs); 1123 1124 Lst_Destroy(emptyPath, Dir_Destroy); 1125 } else { 1126 /* 1127 * No wildcards, but we want to avoid code duplication, 1128 * so create a list with the word on it. 1129 */ 1130 (void)Lst_AtEnd(curTargs, (ClientData)line); 1131 } 1132 1133 while(!Lst_IsEmpty(curTargs)) { 1134 char *targName = (char *)Lst_DeQueue(curTargs); 1135 1136 if (!Suff_IsTransform (targName)) { 1137 gn = Targ_FindNode (targName, TARG_CREATE); 1138 } else { 1139 gn = Suff_AddTransform (targName); 1140 } 1141 1142 (void)Lst_AtEnd (targets, (ClientData)gn); 1143 } 1144 } else if (specType == ExPath && *line != '.' && *line != '\0') { 1145 Parse_Error(PARSE_WARNING, "Extra target (%s) ignored", line); 1146 } 1147 1148 *cp = savec; 1149 /* 1150 * If it is a special type and not .PATH, it's the only target we 1151 * allow on this line... 1152 */ 1153 if (specType != Not && specType != ExPath) { 1154 Boolean warn = FALSE; 1155 1156 while (*cp && (ParseIsEscaped(lstart, cp) || 1157 ((*cp != '!') && (*cp != ':')))) { 1158 if (ParseIsEscaped(lstart, cp) || 1159 (*cp != ' ' && *cp != '\t')) { 1160 warn = TRUE; 1161 } 1162 cp++; 1163 } 1164 if (warn) { 1165 Parse_Error(PARSE_WARNING, "Extra target ignored"); 1166 } 1167 } else { 1168 while (*cp && isspace ((unsigned char)*cp)) { 1169 cp++; 1170 } 1171 } 1172 line = cp; 1173 } while (*line && (ParseIsEscaped(lstart, line) || 1174 ((*line != '!') && (*line != ':')))); 1175 1176 /* 1177 * Don't need the list of target names anymore... 1178 */ 1179 Lst_Destroy(curTargs, NOFREE); 1180 1181 if (!Lst_IsEmpty(targets)) { 1182 switch(specType) { 1183 default: 1184 Parse_Error(PARSE_WARNING, "Special and mundane targets don't mix. Mundane ones ignored"); 1185 break; 1186 case Default: 1187 case Begin: 1188 case End: 1189 case Interrupt: 1190 /* 1191 * These four create nodes on which to hang commands, so 1192 * targets shouldn't be empty... 1193 */ 1194 case Not: 1195 /* 1196 * Nothing special here -- targets can be empty if it wants. 1197 */ 1198 break; 1199 } 1200 } 1201 1202 /* 1203 * Have now parsed all the target names. Must parse the operator next. The 1204 * result is left in op . 1205 */ 1206 if (*cp == '!') { 1207 op = OP_FORCE; 1208 } else if (*cp == ':') { 1209 if (cp[1] == ':') { 1210 op = OP_DOUBLEDEP; 1211 cp++; 1212 } else { 1213 op = OP_DEPENDS; 1214 } 1215 } else { 1216 Parse_Error (PARSE_FATAL, "Missing dependency operator"); 1217 return; 1218 } 1219 1220 cp++; /* Advance beyond operator */ 1221 1222 Lst_ForEach (targets, ParseDoOp, (ClientData)&op); 1223 1224 /* 1225 * Get to the first source 1226 */ 1227 while (*cp && isspace ((unsigned char)*cp)) { 1228 cp++; 1229 } 1230 line = cp; 1231 1232 /* 1233 * Several special targets take different actions if present with no 1234 * sources: 1235 * a .SUFFIXES line with no sources clears out all old suffixes 1236 * a .PRECIOUS line makes all targets precious 1237 * a .IGNORE line ignores errors for all targets 1238 * a .SILENT line creates silence when making all targets 1239 * a .PATH removes all directories from the search path(s). 1240 */ 1241 if (!*line) { 1242 switch (specType) { 1243 case Suffixes: 1244 Suff_ClearSuffixes (); 1245 break; 1246 case Precious: 1247 allPrecious = TRUE; 1248 break; 1249 case Ignore: 1250 ignoreErrors = TRUE; 1251 break; 1252 case Silent: 1253 beSilent = TRUE; 1254 break; 1255 case ExPath: 1256 Lst_ForEach(paths, ParseClearPath, (ClientData)NULL); 1257 Dir_SetPATH(); 1258 break; 1259 #ifdef POSIX 1260 case Posix: 1261 Var_Set("%POSIX", "1003.2", VAR_GLOBAL, 0); 1262 break; 1263 #endif 1264 default: 1265 break; 1266 } 1267 } else if (specType == MFlags) { 1268 /* 1269 * Call on functions in main.c to deal with these arguments and 1270 * set the initial character to a null-character so the loop to 1271 * get sources won't get anything 1272 */ 1273 Main_ParseArgLine (line); 1274 *line = '\0'; 1275 } else if (specType == ExShell) { 1276 if (Job_ParseShell (line) != SUCCESS) { 1277 Parse_Error (PARSE_FATAL, "improper shell specification"); 1278 return; 1279 } 1280 *line = '\0'; 1281 } else if ((specType == NotParallel) || (specType == SingleShell)) { 1282 *line = '\0'; 1283 } 1284 1285 /* 1286 * NOW GO FOR THE SOURCES 1287 */ 1288 if ((specType == Suffixes) || (specType == ExPath) || 1289 (specType == Includes) || (specType == Libs) || 1290 (specType == Null) || (specType == ExObjdir)) 1291 { 1292 while (*line) { 1293 /* 1294 * If the target was one that doesn't take files as its sources 1295 * but takes something like suffixes, we take each 1296 * space-separated word on the line as a something and deal 1297 * with it accordingly. 1298 * 1299 * If the target was .SUFFIXES, we take each source as a 1300 * suffix and add it to the list of suffixes maintained by the 1301 * Suff module. 1302 * 1303 * If the target was a .PATH, we add the source as a directory 1304 * to search on the search path. 1305 * 1306 * If it was .INCLUDES, the source is taken to be the suffix of 1307 * files which will be #included and whose search path should 1308 * be present in the .INCLUDES variable. 1309 * 1310 * If it was .LIBS, the source is taken to be the suffix of 1311 * files which are considered libraries and whose search path 1312 * should be present in the .LIBS variable. 1313 * 1314 * If it was .NULL, the source is the suffix to use when a file 1315 * has no valid suffix. 1316 * 1317 * If it was .OBJDIR, the source is a new definition for .OBJDIR, 1318 * and will cause make to do a new chdir to that path. 1319 */ 1320 while (*cp && !isspace ((unsigned char)*cp)) { 1321 cp++; 1322 } 1323 savec = *cp; 1324 *cp = '\0'; 1325 switch (specType) { 1326 case Suffixes: 1327 Suff_AddSuffix (line, &mainNode); 1328 break; 1329 case ExPath: 1330 Lst_ForEach(paths, ParseAddDir, (ClientData)line); 1331 break; 1332 case Includes: 1333 Suff_AddInclude (line); 1334 break; 1335 case Libs: 1336 Suff_AddLib (line); 1337 break; 1338 case Null: 1339 Suff_SetNull (line); 1340 break; 1341 case ExObjdir: 1342 Main_SetObjdir(line); 1343 break; 1344 default: 1345 break; 1346 } 1347 *cp = savec; 1348 if (savec != '\0') { 1349 cp++; 1350 } 1351 while (*cp && isspace ((unsigned char)*cp)) { 1352 cp++; 1353 } 1354 line = cp; 1355 } 1356 if (paths) { 1357 Lst_Destroy(paths, NOFREE); 1358 } 1359 if (specType == ExPath) 1360 Dir_SetPATH(); 1361 } else { 1362 /* 1363 * We don't need ParseDoSpecialSrc unless .WAIT is present. 1364 */ 1365 hasWait = (strstr(line, ".WAIT") != NULL); 1366 1367 while (*line) { 1368 /* 1369 * The targets take real sources, so we must beware of archive 1370 * specifications (i.e. things with left parentheses in them) 1371 * and handle them accordingly. 1372 */ 1373 while (*cp && !isspace ((unsigned char)*cp)) { 1374 if ((*cp == LPAREN) && (cp > line) && (cp[-1] != '$')) { 1375 /* 1376 * Only stop for a left parenthesis if it isn't at the 1377 * start of a word (that'll be for variable changes 1378 * later) and isn't preceded by a dollar sign (a dynamic 1379 * source). 1380 */ 1381 break; 1382 } else { 1383 cp++; 1384 } 1385 } 1386 1387 if (*cp == LPAREN) { 1388 sources = Lst_Init (FALSE); 1389 if (Arch_ParseArchive (&line, sources, VAR_CMD) != SUCCESS) { 1390 Parse_Error (PARSE_FATAL, 1391 "Error in source archive spec \"%s\"", line); 1392 return; 1393 } 1394 1395 while (!Lst_IsEmpty (sources)) { 1396 gn = (GNode *) Lst_DeQueue (sources); 1397 ParseDoSrc (tOp, gn->name, curSrcs, hasWait); 1398 } 1399 Lst_Destroy (sources, NOFREE); 1400 cp = line; 1401 } else { 1402 if (*cp) { 1403 *cp = '\0'; 1404 cp += 1; 1405 } 1406 1407 ParseDoSrc (tOp, line, curSrcs, hasWait); 1408 } 1409 while (*cp && isspace ((unsigned char)*cp)) { 1410 cp++; 1411 } 1412 line = cp; 1413 } 1414 } 1415 1416 if (mainNode == NILGNODE) { 1417 /* 1418 * If we have yet to decide on a main target to make, in the 1419 * absence of any user input, we want the first target on 1420 * the first dependency line that is actually a real target 1421 * (i.e. isn't a .USE or .EXEC rule) to be made. 1422 */ 1423 Lst_ForEach (targets, ParseFindMain, (ClientData)0); 1424 } 1425 1426 /* 1427 * Finally, destroy the list of sources 1428 */ 1429 Lst_Destroy(curSrcs, NOFREE); 1430 } 1431 1432 /*- 1433 *--------------------------------------------------------------------- 1434 * Parse_IsVar -- 1435 * Return TRUE if the passed line is a variable assignment. A variable 1436 * assignment consists of a single word followed by optional whitespace 1437 * followed by either a += or an = operator. 1438 * This function is used both by the Parse_File function and main when 1439 * parsing the command-line arguments. 1440 * 1441 * Input: 1442 * line the line to check 1443 * 1444 * Results: 1445 * TRUE if it is. FALSE if it ain't 1446 * 1447 * Side Effects: 1448 * none 1449 *--------------------------------------------------------------------- 1450 */ 1451 Boolean 1452 Parse_IsVar(char *line) 1453 { 1454 Boolean wasSpace = FALSE; /* set TRUE if found a space */ 1455 Boolean haveName = FALSE; /* Set TRUE if have a variable name */ 1456 int level = 0; 1457 #define ISEQOPERATOR(c) \ 1458 (((c) == '+') || ((c) == ':') || ((c) == '?') || ((c) == '!')) 1459 1460 /* 1461 * Skip to variable name 1462 */ 1463 for (;(*line == ' ') || (*line == '\t'); line++) 1464 continue; 1465 1466 for (; *line != '=' || level != 0; line++) 1467 switch (*line) { 1468 case '\0': 1469 /* 1470 * end-of-line -- can't be a variable assignment. 1471 */ 1472 return FALSE; 1473 1474 case ' ': 1475 case '\t': 1476 /* 1477 * there can be as much white space as desired so long as there is 1478 * only one word before the operator 1479 */ 1480 wasSpace = TRUE; 1481 break; 1482 1483 case LPAREN: 1484 case '{': 1485 level++; 1486 break; 1487 1488 case '}': 1489 case RPAREN: 1490 level--; 1491 break; 1492 1493 default: 1494 if (wasSpace && haveName) { 1495 if (ISEQOPERATOR(*line)) { 1496 /* 1497 * We must have a finished word 1498 */ 1499 if (level != 0) 1500 return FALSE; 1501 1502 /* 1503 * When an = operator [+?!:] is found, the next 1504 * character must be an = or it ain't a valid 1505 * assignment. 1506 */ 1507 if (line[1] == '=') 1508 return haveName; 1509 #ifdef SUNSHCMD 1510 /* 1511 * This is a shell command 1512 */ 1513 if (strncmp(line, ":sh", 3) == 0) 1514 return haveName; 1515 #endif 1516 } 1517 /* 1518 * This is the start of another word, so not assignment. 1519 */ 1520 return FALSE; 1521 } 1522 else { 1523 haveName = TRUE; 1524 wasSpace = FALSE; 1525 } 1526 break; 1527 } 1528 1529 return haveName; 1530 } 1531 1532 /*- 1533 *--------------------------------------------------------------------- 1534 * Parse_DoVar -- 1535 * Take the variable assignment in the passed line and do it in the 1536 * global context. 1537 * 1538 * Note: There is a lexical ambiguity with assignment modifier characters 1539 * in variable names. This routine interprets the character before the = 1540 * as a modifier. Therefore, an assignment like 1541 * C++=/usr/bin/CC 1542 * is interpreted as "C+ +=" instead of "C++ =". 1543 * 1544 * Input: 1545 * line a line guaranteed to be a variable assignment. 1546 * This reduces error checks 1547 * ctxt Context in which to do the assignment 1548 * 1549 * Results: 1550 * none 1551 * 1552 * Side Effects: 1553 * the variable structure of the given variable name is altered in the 1554 * global context. 1555 *--------------------------------------------------------------------- 1556 */ 1557 void 1558 Parse_DoVar(char *line, GNode *ctxt) 1559 { 1560 char *cp; /* pointer into line */ 1561 enum { 1562 VAR_SUBST, VAR_APPEND, VAR_SHELL, VAR_NORMAL 1563 } type; /* Type of assignment */ 1564 char *opc; /* ptr to operator character to 1565 * null-terminate the variable name */ 1566 Boolean freeCp = FALSE; /* TRUE if cp needs to be freed, 1567 * i.e. if any variable expansion was 1568 * performed */ 1569 /* 1570 * Avoid clobbered variable warnings by forcing the compiler 1571 * to ``unregister'' variables 1572 */ 1573 #if __GNUC__ 1574 (void) &cp; 1575 (void) &line; 1576 #endif 1577 1578 /* 1579 * Skip to variable name 1580 */ 1581 while ((*line == ' ') || (*line == '\t')) { 1582 line++; 1583 } 1584 1585 /* 1586 * Skip to operator character, nulling out whitespace as we go 1587 */ 1588 for (cp = line + 1; *cp != '='; cp++) { 1589 if (isspace ((unsigned char)*cp)) { 1590 *cp = '\0'; 1591 } 1592 } 1593 opc = cp-1; /* operator is the previous character */ 1594 *cp++ = '\0'; /* nuke the = */ 1595 1596 /* 1597 * Check operator type 1598 */ 1599 switch (*opc) { 1600 case '+': 1601 type = VAR_APPEND; 1602 *opc = '\0'; 1603 break; 1604 1605 case '?': 1606 /* 1607 * If the variable already has a value, we don't do anything. 1608 */ 1609 *opc = '\0'; 1610 if (Var_Exists(line, ctxt)) { 1611 return; 1612 } else { 1613 type = VAR_NORMAL; 1614 } 1615 break; 1616 1617 case ':': 1618 type = VAR_SUBST; 1619 *opc = '\0'; 1620 break; 1621 1622 case '!': 1623 type = VAR_SHELL; 1624 *opc = '\0'; 1625 break; 1626 1627 default: 1628 #ifdef SUNSHCMD 1629 while (opc > line && *opc != ':') 1630 opc--; 1631 1632 if (strncmp(opc, ":sh", 3) == 0) { 1633 type = VAR_SHELL; 1634 *opc = '\0'; 1635 break; 1636 } 1637 #endif 1638 type = VAR_NORMAL; 1639 break; 1640 } 1641 1642 while (isspace ((unsigned char)*cp)) { 1643 cp++; 1644 } 1645 1646 if (type == VAR_APPEND) { 1647 Var_Append (line, cp, ctxt); 1648 } else if (type == VAR_SUBST) { 1649 /* 1650 * Allow variables in the old value to be undefined, but leave their 1651 * invocation alone -- this is done by forcing oldVars to be false. 1652 * XXX: This can cause recursive variables, but that's not hard to do, 1653 * and this allows someone to do something like 1654 * 1655 * CFLAGS = $(.INCLUDES) 1656 * CFLAGS := -I.. $(CFLAGS) 1657 * 1658 * And not get an error. 1659 */ 1660 Boolean oldOldVars = oldVars; 1661 1662 oldVars = FALSE; 1663 1664 /* 1665 * make sure that we set the variable the first time to nothing 1666 * so that it gets substituted! 1667 */ 1668 if (!Var_Exists(line, ctxt)) 1669 Var_Set(line, "", ctxt, 0); 1670 1671 cp = Var_Subst(NULL, cp, ctxt, FALSE); 1672 oldVars = oldOldVars; 1673 freeCp = TRUE; 1674 1675 Var_Set(line, cp, ctxt, 0); 1676 } else if (type == VAR_SHELL) { 1677 char *res, *err; 1678 1679 if (strchr(cp, '$') != NULL) { 1680 /* 1681 * There's a dollar sign in the command, so perform variable 1682 * expansion on the whole thing. The resulting string will need 1683 * freeing when we're done, so set freeCmd to TRUE. 1684 */ 1685 cp = Var_Subst(NULL, cp, VAR_CMD, TRUE); 1686 freeCp = TRUE; 1687 } 1688 1689 res = Cmd_Exec(cp, &err); 1690 Var_Set(line, res, ctxt, 0); 1691 free(res); 1692 1693 if (err) 1694 Parse_Error(PARSE_WARNING, err, cp); 1695 } else { 1696 /* 1697 * Normal assignment -- just do it. 1698 */ 1699 Var_Set(line, cp, ctxt, 0); 1700 } 1701 if (strcmp(line, MAKEOVERRIDES) == 0) 1702 Main_ExportMAKEFLAGS(FALSE); /* re-export MAKEFLAGS */ 1703 else if (strcmp(line, ".CURDIR") == 0) { 1704 /* 1705 * Somone is being (too?) clever... 1706 * Let's pretend they know what they are doing and 1707 * re-initialize the 'cur' Path. 1708 */ 1709 Dir_InitCur(cp); 1710 Dir_SetPATH(); 1711 } 1712 if (freeCp) 1713 free(cp); 1714 } 1715 1716 1717 /*- 1718 * ParseAddCmd -- 1719 * Lst_ForEach function to add a command line to all targets 1720 * 1721 * Input: 1722 * gnp the node to which the command is to be added 1723 * cmd the command to add 1724 * 1725 * Results: 1726 * Always 0 1727 * 1728 * Side Effects: 1729 * A new element is added to the commands list of the node. 1730 */ 1731 static int 1732 ParseAddCmd(ClientData gnp, ClientData cmd) 1733 { 1734 GNode *gn = (GNode *) gnp; 1735 /* if target already supplied, ignore commands */ 1736 if ((gn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (gn->cohorts)) 1737 gn = (GNode *) Lst_Datum (Lst_Last (gn->cohorts)); 1738 if (!(gn->type & OP_HAS_COMMANDS)) { 1739 (void)Lst_AtEnd(gn->commands, cmd); 1740 ParseMark(gn); 1741 } else { 1742 #ifdef notyet 1743 /* XXX: We cannot do this until we fix the tree */ 1744 (void)Lst_AtEnd(gn->commands, cmd); 1745 Parse_Error (PARSE_WARNING, 1746 "overriding commands for target \"%s\"; " 1747 "previous commands defined at %s: %d ignored", 1748 gn->name, gn->fname, gn->lineno); 1749 #else 1750 Parse_Error (PARSE_WARNING, 1751 "duplicate script for target \"%s\" ignored", 1752 gn->name); 1753 ParseErrorInternal (gn->fname, gn->lineno, PARSE_WARNING, 1754 "using previous script for \"%s\" defined here", 1755 gn->name); 1756 #endif 1757 } 1758 return(0); 1759 } 1760 1761 /*- 1762 *----------------------------------------------------------------------- 1763 * ParseHasCommands -- 1764 * Callback procedure for Parse_File when destroying the list of 1765 * targets on the last dependency line. Marks a target as already 1766 * having commands if it does, to keep from having shell commands 1767 * on multiple dependency lines. 1768 * 1769 * Input: 1770 * gnp Node to examine 1771 * 1772 * Results: 1773 * None 1774 * 1775 * Side Effects: 1776 * OP_HAS_COMMANDS may be set for the target. 1777 * 1778 *----------------------------------------------------------------------- 1779 */ 1780 static void 1781 ParseHasCommands(ClientData gnp) 1782 { 1783 GNode *gn = (GNode *) gnp; 1784 if (!Lst_IsEmpty(gn->commands)) { 1785 gn->type |= OP_HAS_COMMANDS; 1786 } 1787 } 1788 1789 /*- 1790 *----------------------------------------------------------------------- 1791 * Parse_AddIncludeDir -- 1792 * Add a directory to the path searched for included makefiles 1793 * bracketed by double-quotes. Used by functions in main.c 1794 * 1795 * Input: 1796 * dir The name of the directory to add 1797 * 1798 * Results: 1799 * None. 1800 * 1801 * Side Effects: 1802 * The directory is appended to the list. 1803 * 1804 *----------------------------------------------------------------------- 1805 */ 1806 void 1807 Parse_AddIncludeDir(char *dir) 1808 { 1809 (void) Dir_AddDir (parseIncPath, dir); 1810 } 1811 1812 /*- 1813 *--------------------------------------------------------------------- 1814 * ParseDoInclude -- 1815 * Push to another file. 1816 * 1817 * The input is the line minus the `.'. A file spec is a string 1818 * enclosed in <> or "". The former is looked for only in sysIncPath. 1819 * The latter in . and the directories specified by -I command line 1820 * options 1821 * 1822 * Results: 1823 * None 1824 * 1825 * Side Effects: 1826 * A structure is added to the includes Lst and readProc, lineno, 1827 * fname and curFILE are altered for the new file 1828 *--------------------------------------------------------------------- 1829 */ 1830 static void 1831 ParseDoInclude(char *line) 1832 { 1833 char *fullname; /* full pathname of file */ 1834 IFile *oldFile; /* state associated with current file */ 1835 char endc; /* the character which ends the file spec */ 1836 char *cp; /* current position in file spec */ 1837 Boolean isSystem; /* TRUE if makefile is a system makefile */ 1838 int silent = (*line != 'i') ? 1 : 0; 1839 char *file = &line[7 + silent]; 1840 1841 /* 1842 * Skip to delimiter character so we know where to look 1843 */ 1844 while ((*file == ' ') || (*file == '\t')) { 1845 file++; 1846 } 1847 1848 if ((*file != '"') && (*file != '<')) { 1849 Parse_Error (PARSE_FATAL, 1850 ".include filename must be delimited by '\"' or '<'"); 1851 return; 1852 } 1853 1854 /* 1855 * Set the search path on which to find the include file based on the 1856 * characters which bracket its name. Angle-brackets imply it's 1857 * a system Makefile while double-quotes imply it's a user makefile 1858 */ 1859 if (*file == '<') { 1860 isSystem = TRUE; 1861 endc = '>'; 1862 } else { 1863 isSystem = FALSE; 1864 endc = '"'; 1865 } 1866 1867 /* 1868 * Skip to matching delimiter 1869 */ 1870 for (cp = ++file; *cp && *cp != endc; cp++) { 1871 continue; 1872 } 1873 1874 if (*cp != endc) { 1875 Parse_Error (PARSE_FATAL, 1876 "Unclosed %cinclude filename. '%c' expected", 1877 '.', endc); 1878 return; 1879 } 1880 *cp = '\0'; 1881 1882 /* 1883 * Substitute for any variables in the file name before trying to 1884 * find the thing. 1885 */ 1886 file = Var_Subst (NULL, file, VAR_CMD, FALSE); 1887 1888 /* 1889 * Now we know the file's name and its search path, we attempt to 1890 * find the durn thing. A return of NULL indicates the file don't 1891 * exist. 1892 */ 1893 fullname = (char *)NULL; 1894 1895 if (!isSystem) { 1896 /* 1897 * Include files contained in double-quotes are first searched for 1898 * relative to the including file's location. We don't want to 1899 * cd there, of course, so we just tack on the old file's 1900 * leading path components and call Dir_FindFile to see if 1901 * we can locate the beast. 1902 */ 1903 char *prefEnd, *Fname; 1904 1905 /* Make a temporary copy of this, to be safe. */ 1906 Fname = estrdup(curFile.fname); 1907 1908 prefEnd = strrchr (Fname, '/'); 1909 if (prefEnd != (char *)NULL) { 1910 char *newName; 1911 1912 *prefEnd = '\0'; 1913 if (file[0] == '/') 1914 newName = estrdup(file); 1915 else 1916 newName = str_concat (Fname, file, STR_ADDSLASH); 1917 fullname = Dir_FindFile (newName, parseIncPath); 1918 if (fullname == (char *)NULL) { 1919 fullname = Dir_FindFile(newName, dirSearchPath); 1920 } 1921 free (newName); 1922 *prefEnd = '/'; 1923 } else { 1924 fullname = (char *)NULL; 1925 } 1926 free (Fname); 1927 if (fullname == (char *)NULL) { 1928 /* 1929 * Makefile wasn't found in same directory as included makefile. 1930 * Search for it first on the -I search path, 1931 * then on the .PATH search path, if not found in a -I directory. 1932 * XXX: Suffix specific? 1933 */ 1934 fullname = Dir_FindFile (file, parseIncPath); 1935 if (fullname == (char *)NULL) { 1936 fullname = Dir_FindFile(file, dirSearchPath); 1937 } 1938 } 1939 } 1940 1941 /* Looking for a system file or file still not found */ 1942 if (fullname == (char *)NULL) { 1943 /* 1944 * Look for it on the system path 1945 */ 1946 fullname = Dir_FindFile(file, Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath); 1947 } 1948 1949 if (fullname == (char *) NULL) { 1950 *cp = endc; 1951 if (!silent) 1952 Parse_Error (PARSE_FATAL, "Could not find %s", file); 1953 return; 1954 } 1955 1956 free(file); 1957 1958 /* 1959 * Once we find the absolute path to the file, we get to save all the 1960 * state from the current file before we can start reading this 1961 * include file. The state is stored in an IFile structure which 1962 * is placed on a list with other IFile structures. The list makes 1963 * a very nice stack to track how we got here... 1964 */ 1965 oldFile = (IFile *) emalloc (sizeof (IFile)); 1966 1967 memcpy(oldFile, &curFile, sizeof (IFile)); 1968 1969 (void) Lst_AtFront (includes, (ClientData)oldFile); 1970 1971 /* 1972 * Once the previous state has been saved, we can get down to reading 1973 * the new file. We set up the name of the file to be the absolute 1974 * name of the include file so error messages refer to the right 1975 * place. Naturally enough, we start reading at line number 0. 1976 */ 1977 curFile.fname = fullname; 1978 curFile.lineno = 0; 1979 1980 ParseSetParseFile(curFile.fname); 1981 1982 curFile.F = fopen (fullname, "r"); 1983 curFile.P = NULL; 1984 1985 if (curFile.F == (FILE * ) NULL) { 1986 if (!silent) 1987 Parse_Error (PARSE_FATAL, "Cannot open %s", fullname); 1988 /* 1989 * Pop to previous file 1990 */ 1991 (void) ParseEOF(0); 1992 } 1993 } 1994 1995 1996 /*- 1997 *--------------------------------------------------------------------- 1998 * ParseSetParseFile -- 1999 * Set the .PARSEDIR and .PARSEFILE variables to the dirname and 2000 * basename of the given filename 2001 * 2002 * Results: 2003 * None 2004 * 2005 * Side Effects: 2006 * The .PARSEDIR and .PARSEFILE variables are overwritten by the 2007 * dirname and basename of the given filename. 2008 *--------------------------------------------------------------------- 2009 */ 2010 static void 2011 ParseSetParseFile(char *filename) 2012 { 2013 char *slash; 2014 2015 slash = strrchr(filename, '/'); 2016 if (slash == 0) { 2017 Var_Set(".PARSEDIR", ".", VAR_GLOBAL, 0); 2018 Var_Set(".PARSEFILE", filename, VAR_GLOBAL, 0); 2019 } else { 2020 *slash = '\0'; 2021 Var_Set(".PARSEDIR", filename, VAR_GLOBAL, 0); 2022 Var_Set(".PARSEFILE", slash+1, VAR_GLOBAL, 0); 2023 *slash = '/'; 2024 } 2025 } 2026 2027 2028 /*- 2029 *--------------------------------------------------------------------- 2030 * Parse_FromString -- 2031 * Start Parsing from the given string 2032 * 2033 * Results: 2034 * None 2035 * 2036 * Side Effects: 2037 * A structure is added to the includes Lst and readProc, lineno, 2038 * fname and curFILE are altered for the new file 2039 *--------------------------------------------------------------------- 2040 */ 2041 void 2042 Parse_FromString(char *str) 2043 { 2044 IFile *oldFile; /* state associated with this file */ 2045 2046 if (DEBUG(FOR)) 2047 (void) fprintf(stderr, "%s\n----\n", str); 2048 2049 oldFile = (IFile *) emalloc (sizeof (IFile)); 2050 memcpy(oldFile, &curFile, sizeof (IFile)); 2051 2052 (void) Lst_AtFront (includes, (ClientData)oldFile); 2053 2054 curFile.F = NULL; 2055 curFile.P = (PTR *) emalloc (sizeof (PTR)); 2056 curFile.P->str = curFile.P->ptr = str; 2057 curFile.lineno = 0; 2058 curFile.fname = estrdup(curFile.fname); 2059 } 2060 2061 2062 #ifdef SYSVINCLUDE 2063 /*- 2064 *--------------------------------------------------------------------- 2065 * ParseTraditionalInclude -- 2066 * Push to another file. 2067 * 2068 * The input is the current line. The file name(s) are 2069 * following the "include". 2070 * 2071 * Results: 2072 * None 2073 * 2074 * Side Effects: 2075 * A structure is added to the includes Lst and readProc, lineno, 2076 * fname and curFILE are altered for the new file 2077 *--------------------------------------------------------------------- 2078 */ 2079 static void 2080 ParseTraditionalInclude(char *line) 2081 { 2082 char *fullname; /* full pathname of file */ 2083 IFile *oldFile; /* state associated with current file */ 2084 char *cp; /* current position in file spec */ 2085 char *prefEnd; 2086 int done = 0; 2087 int silent = (line[0] != 'i') ? 1 : 0; 2088 char *file = &line[silent + 7]; 2089 char *cfname; 2090 size_t clineno; 2091 2092 cfname = curFile.fname; 2093 clineno = curFile.lineno; 2094 2095 /* 2096 * Skip over whitespace 2097 */ 2098 while (isspace((unsigned char)*file)) 2099 file++; 2100 2101 if (*file == '\0') { 2102 Parse_Error (PARSE_FATAL, 2103 "Filename missing from \"include\""); 2104 return; 2105 } 2106 2107 for (; !done; file = cp + 1) { 2108 /* 2109 * Skip to end of line or next whitespace 2110 */ 2111 for (cp = file; *cp && !isspace((unsigned char) *cp); cp++) 2112 continue; 2113 2114 if (*cp) 2115 *cp = '\0'; 2116 else 2117 done = 1; 2118 2119 /* 2120 * Substitute for any variables in the file name before trying to 2121 * find the thing. 2122 */ 2123 file = Var_Subst(NULL, file, VAR_CMD, FALSE); 2124 2125 /* 2126 * Now we know the file's name, we attempt to find the durn thing. 2127 * A return of NULL indicates the file don't exist. 2128 * 2129 * Include files are first searched for relative to the including 2130 * file's location. We don't want to cd there, of course, so we 2131 * just tack on the old file's leading path components and call 2132 * Dir_FindFile to see if we can locate the beast. 2133 * XXX - this *does* search in the current directory, right? 2134 */ 2135 2136 prefEnd = strrchr(cfname, '/'); 2137 if (prefEnd != NULL) { 2138 char *newName; 2139 2140 *prefEnd = '\0'; 2141 newName = str_concat(cfname, file, STR_ADDSLASH); 2142 fullname = Dir_FindFile(newName, parseIncPath); 2143 if (fullname == NULL) { 2144 fullname = Dir_FindFile(newName, dirSearchPath); 2145 } 2146 free (newName); 2147 *prefEnd = '/'; 2148 } else { 2149 fullname = NULL; 2150 } 2151 2152 if (fullname == NULL) { 2153 /* 2154 * System makefile or makefile wasn't found in same directory as 2155 * included makefile. Search for it first on the -I search path, 2156 * then on the .PATH search path, if not found in a 2157 * -I directory. XXX: Suffix specific? 2158 */ 2159 fullname = Dir_FindFile(file, parseIncPath); 2160 if (fullname == NULL) { 2161 fullname = Dir_FindFile(file, dirSearchPath); 2162 } 2163 } 2164 2165 if (fullname == NULL) { 2166 /* 2167 * Still haven't found the makefile. Look for it on the system 2168 * path as a last resort. 2169 */ 2170 fullname = Dir_FindFile(file, 2171 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath); 2172 } 2173 2174 if (fullname == NULL) { 2175 if (!silent) 2176 ParseErrorInternal(cfname, clineno, PARSE_FATAL, 2177 "Could not find %s", file); 2178 free(file); 2179 continue; 2180 } 2181 2182 free(file); 2183 2184 /* 2185 * Once we find the absolute path to the file, we get to save all 2186 * the state from the current file before we can start reading this 2187 * include file. The state is stored in an IFile structure which 2188 * is placed on a list with other IFile structures. The list makes 2189 * a very nice stack to track how we got here... 2190 */ 2191 oldFile = (IFile *) emalloc(sizeof(IFile)); 2192 memcpy(oldFile, &curFile, sizeof (IFile)); 2193 2194 (void) Lst_AtFront(includes, (ClientData)oldFile); 2195 2196 /* 2197 * Once the previous state has been saved, we can get down to 2198 * reading the new file. We set up the name of the file to be the 2199 * absolute name of the include file so error messages refer to the 2200 * right place. Naturally enough, we start reading at line number 0. 2201 */ 2202 curFile.fname = fullname; 2203 curFile.lineno = 0; 2204 2205 curFile.F = fopen(fullname, "r"); 2206 curFile.P = NULL; 2207 2208 if (curFile.F == NULL) { 2209 if (!silent) 2210 ParseErrorInternal(cfname, clineno, PARSE_FATAL, 2211 "Cannot open %s", fullname); 2212 /* 2213 * Pop to previous file 2214 */ 2215 (void) ParseEOF(1); 2216 } 2217 } 2218 } 2219 #endif 2220 2221 /*- 2222 *--------------------------------------------------------------------- 2223 * ParseEOF -- 2224 * Called when EOF is reached in the current file. If we were reading 2225 * an include file, the includes stack is popped and things set up 2226 * to go back to reading the previous file at the previous location. 2227 * 2228 * Results: 2229 * CONTINUE if there's more to do. DONE if not. 2230 * 2231 * Side Effects: 2232 * The old curFILE, is closed. The includes list is shortened. 2233 * lineno, curFILE, and fname are changed if CONTINUE is returned. 2234 *--------------------------------------------------------------------- 2235 */ 2236 static int 2237 ParseEOF(int opened) 2238 { 2239 IFile *ifile; /* the state on the top of the includes stack */ 2240 2241 if (Lst_IsEmpty (includes)) { 2242 Var_Delete(".PARSEDIR", VAR_GLOBAL); 2243 Var_Delete(".PARSEFILE", VAR_GLOBAL); 2244 return (DONE); 2245 } 2246 2247 ifile = (IFile *) Lst_DeQueue (includes); 2248 2249 /* XXX dispose of curFile info */ 2250 free ((Address) curFile.fname); 2251 if (opened && curFile.F) 2252 (void) fclose (curFile.F); 2253 if (curFile.P) { 2254 free((Address) curFile.P->str); 2255 free((Address) curFile.P); 2256 } 2257 2258 memcpy(&curFile, ifile, sizeof (IFile)); 2259 2260 free ((Address)ifile); 2261 2262 /* pop the PARSEDIR/PARSEFILE variables */ 2263 ParseSetParseFile(curFile.fname); 2264 return (CONTINUE); 2265 } 2266 2267 /*- 2268 *--------------------------------------------------------------------- 2269 * ParseReadc -- 2270 * Read a character from the current file 2271 * 2272 * Results: 2273 * The character that was read 2274 * 2275 * Side Effects: 2276 *--------------------------------------------------------------------- 2277 */ 2278 static __inline int 2279 ParseReadc(void) 2280 { 2281 if (curFile.F) 2282 return fgetc(curFile.F); 2283 2284 if (curFile.P && *curFile.P->ptr) 2285 return *curFile.P->ptr++; 2286 return EOF; 2287 } 2288 2289 2290 /*- 2291 *--------------------------------------------------------------------- 2292 * ParseUnreadc -- 2293 * Put back a character to the current file 2294 * 2295 * Results: 2296 * None. 2297 * 2298 * Side Effects: 2299 *--------------------------------------------------------------------- 2300 */ 2301 static void 2302 ParseUnreadc(int c) 2303 { 2304 if (curFile.F) { 2305 ungetc(c, curFile.F); 2306 return; 2307 } 2308 if (curFile.P) { 2309 *--(curFile.P->ptr) = c; 2310 return; 2311 } 2312 } 2313 2314 2315 /* ParseSkipLine(): 2316 * Grab the next line 2317 * 2318 * Input: 2319 * skip Skip lines that don't start with . 2320 * 2321 */ 2322 static char * 2323 ParseSkipLine(int skip) 2324 { 2325 char *line; 2326 int c, lastc, lineLength = 0; 2327 Buffer buf; 2328 2329 buf = Buf_Init(MAKE_BSIZE); 2330 2331 do { 2332 Buf_Discard(buf, lineLength); 2333 lastc = '\0'; 2334 2335 while (((c = ParseReadc()) != '\n' || lastc == '\\') 2336 && c != EOF) { 2337 if (c == '\n') { 2338 Buf_ReplaceLastByte(buf, (Byte)' '); 2339 curFile.lineno++; 2340 2341 while ((c = ParseReadc()) == ' ' || c == '\t'); 2342 2343 if (c == EOF) 2344 break; 2345 } 2346 2347 Buf_AddByte(buf, (Byte)c); 2348 lastc = c; 2349 } 2350 2351 if (c == EOF) { 2352 Parse_Error(PARSE_FATAL, "Unclosed conditional/for loop"); 2353 Buf_Destroy(buf, TRUE); 2354 return((char *)NULL); 2355 } 2356 2357 curFile.lineno++; 2358 Buf_AddByte(buf, (Byte)'\0'); 2359 line = (char *)Buf_GetAll(buf, &lineLength); 2360 } while (skip == 1 && line[0] != '.'); 2361 2362 Buf_Destroy(buf, FALSE); 2363 return line; 2364 } 2365 2366 2367 /*- 2368 *--------------------------------------------------------------------- 2369 * ParseReadLine -- 2370 * Read an entire line from the input file. Called only by Parse_File. 2371 * To facilitate escaped newlines and what have you, a character is 2372 * buffered in 'lastc', which is '\0' when no characters have been 2373 * read. When we break out of the loop, c holds the terminating 2374 * character and lastc holds a character that should be added to 2375 * the line (unless we don't read anything but a terminator). 2376 * 2377 * Results: 2378 * A line w/o its newline 2379 * 2380 * Side Effects: 2381 * Only those associated with reading a character 2382 *--------------------------------------------------------------------- 2383 */ 2384 static char * 2385 ParseReadLine(void) 2386 { 2387 Buffer buf; /* Buffer for current line */ 2388 int c; /* the current character */ 2389 int lastc; /* The most-recent character */ 2390 Boolean semiNL; /* treat semi-colons as newlines */ 2391 Boolean ignDepOp; /* TRUE if should ignore dependency operators 2392 * for the purposes of setting semiNL */ 2393 Boolean ignComment; /* TRUE if should ignore comments (in a 2394 * shell command */ 2395 char *line; /* Result */ 2396 char *ep; /* to strip trailing blanks */ 2397 int lineLength; /* Length of result */ 2398 2399 semiNL = FALSE; 2400 ignDepOp = FALSE; 2401 ignComment = FALSE; 2402 2403 /* 2404 * Handle special-characters at the beginning of the line. Either a 2405 * leading tab (shell command) or pound-sign (possible conditional) 2406 * forces us to ignore comments and dependency operators and treat 2407 * semi-colons as semi-colons (by leaving semiNL FALSE). This also 2408 * discards completely blank lines. 2409 */ 2410 for (;;) { 2411 c = ParseReadc(); 2412 2413 if (c == '\t') { 2414 ignComment = ignDepOp = TRUE; 2415 break; 2416 } else if (c == '\n') { 2417 curFile.lineno++; 2418 } else if (c == '#') { 2419 ParseUnreadc(c); 2420 break; 2421 } else { 2422 /* 2423 * Anything else breaks out without doing anything 2424 */ 2425 break; 2426 } 2427 } 2428 2429 if (c != EOF) { 2430 lastc = c; 2431 buf = Buf_Init(MAKE_BSIZE); 2432 2433 while (((c = ParseReadc ()) != '\n' || (lastc == '\\')) && 2434 (c != EOF)) 2435 { 2436 test_char: 2437 switch(c) { 2438 case '\n': 2439 /* 2440 * Escaped newline: read characters until a non-space or an 2441 * unescaped newline and replace them all by a single space. 2442 * This is done by storing the space over the backslash and 2443 * dropping through with the next nonspace. If it is a 2444 * semi-colon and semiNL is TRUE, it will be recognized as a 2445 * newline in the code below this... 2446 */ 2447 curFile.lineno++; 2448 lastc = ' '; 2449 while ((c = ParseReadc ()) == ' ' || c == '\t') { 2450 continue; 2451 } 2452 if (c == EOF || c == '\n') { 2453 goto line_read; 2454 } else { 2455 /* 2456 * Check for comments, semiNL's, etc. -- easier than 2457 * ParseUnreadc(c); continue; 2458 */ 2459 goto test_char; 2460 } 2461 /*NOTREACHED*/ 2462 break; 2463 2464 case ';': 2465 /* 2466 * Semi-colon: Need to see if it should be interpreted as a 2467 * newline 2468 */ 2469 if (semiNL) { 2470 /* 2471 * To make sure the command that may be following this 2472 * semi-colon begins with a tab, we push one back into the 2473 * input stream. This will overwrite the semi-colon in the 2474 * buffer. If there is no command following, this does no 2475 * harm, since the newline remains in the buffer and the 2476 * whole line is ignored. 2477 */ 2478 ParseUnreadc('\t'); 2479 goto line_read; 2480 } 2481 break; 2482 case '=': 2483 if (!semiNL) { 2484 /* 2485 * Haven't seen a dependency operator before this, so this 2486 * must be a variable assignment -- don't pay attention to 2487 * dependency operators after this. 2488 */ 2489 ignDepOp = TRUE; 2490 } else if (lastc == ':' || lastc == '!') { 2491 /* 2492 * Well, we've seen a dependency operator already, but it 2493 * was the previous character, so this is really just an 2494 * expanded variable assignment. Revert semi-colons to 2495 * being just semi-colons again and ignore any more 2496 * dependency operators. 2497 * 2498 * XXX: Note that a line like "foo : a:=b" will blow up, 2499 * but who'd write a line like that anyway? 2500 */ 2501 ignDepOp = TRUE; semiNL = FALSE; 2502 } 2503 break; 2504 case '#': 2505 if (!ignComment) { 2506 if ( 2507 #if 0 2508 compatMake && 2509 #endif 2510 (lastc != '\\')) { 2511 /* 2512 * If the character is a hash mark and it isn't escaped 2513 * (or we're being compatible), the thing is a comment. 2514 * Skip to the end of the line. 2515 */ 2516 do { 2517 c = ParseReadc(); 2518 } while ((c != '\n') && (c != EOF)); 2519 goto line_read; 2520 } else { 2521 /* 2522 * Don't add the backslash. Just let the # get copied 2523 * over. 2524 */ 2525 lastc = c; 2526 continue; 2527 } 2528 } 2529 break; 2530 case ':': 2531 case '!': 2532 if (!ignDepOp && (c == ':' || c == '!')) { 2533 /* 2534 * A semi-colon is recognized as a newline only on 2535 * dependency lines. Dependency lines are lines with a 2536 * colon or an exclamation point. Ergo... 2537 */ 2538 semiNL = TRUE; 2539 } 2540 break; 2541 } 2542 /* 2543 * Copy in the previous character and save this one in lastc. 2544 */ 2545 Buf_AddByte (buf, (Byte)lastc); 2546 lastc = c; 2547 2548 } 2549 line_read: 2550 curFile.lineno++; 2551 2552 if (lastc != '\0') { 2553 Buf_AddByte (buf, (Byte)lastc); 2554 } 2555 Buf_AddByte (buf, (Byte)'\0'); 2556 line = (char *)Buf_GetAll (buf, &lineLength); 2557 Buf_Destroy (buf, FALSE); 2558 2559 /* 2560 * Strip trailing blanks and tabs from the line. 2561 * Do not strip a blank or tab that is preceded by 2562 * a '\' 2563 */ 2564 ep = line; 2565 while (*ep) 2566 ++ep; 2567 while (ep > line + 1 && (ep[-1] == ' ' || ep[-1] == '\t')) { 2568 if (ep > line + 1 && ep[-2] == '\\') 2569 break; 2570 --ep; 2571 } 2572 *ep = 0; 2573 2574 if (line[0] == '.') { 2575 /* 2576 * The line might be a conditional. Ask the conditional module 2577 * about it and act accordingly 2578 */ 2579 switch (Cond_Eval (line)) { 2580 case COND_SKIP: 2581 /* 2582 * Skip to next conditional that evaluates to COND_PARSE. 2583 */ 2584 do { 2585 free (line); 2586 line = ParseSkipLine(1); 2587 } while (line && Cond_Eval(line) != COND_PARSE); 2588 if (line == NULL) 2589 break; 2590 /*FALLTHRU*/ 2591 case COND_PARSE: 2592 free ((Address) line); 2593 line = ParseReadLine(); 2594 break; 2595 case COND_INVALID: 2596 if (For_Eval(line)) { 2597 int ok; 2598 free(line); 2599 do { 2600 /* 2601 * Skip after the matching end 2602 */ 2603 line = ParseSkipLine(0); 2604 if (line == NULL) { 2605 Parse_Error (PARSE_FATAL, 2606 "Unexpected end of file in for loop.\n"); 2607 break; 2608 } 2609 ok = For_Eval(line); 2610 free(line); 2611 } 2612 while (ok); 2613 if (line != NULL) 2614 For_Run(); 2615 line = ParseReadLine(); 2616 } 2617 break; 2618 } 2619 } 2620 return (line); 2621 2622 } else { 2623 /* 2624 * Hit end-of-file, so return a NULL line to indicate this. 2625 */ 2626 return((char *)NULL); 2627 } 2628 } 2629 2630 /*- 2631 *----------------------------------------------------------------------- 2632 * ParseFinishLine -- 2633 * Handle the end of a dependency group. 2634 * 2635 * Results: 2636 * Nothing. 2637 * 2638 * Side Effects: 2639 * inLine set FALSE. 'targets' list destroyed. 2640 * 2641 *----------------------------------------------------------------------- 2642 */ 2643 static void 2644 ParseFinishLine(void) 2645 { 2646 if (inLine) { 2647 Lst_ForEach(targets, Suff_EndTransform, (ClientData)NULL); 2648 Lst_Destroy (targets, ParseHasCommands); 2649 targets = NULL; 2650 inLine = FALSE; 2651 } 2652 } 2653 2654 2655 /*- 2656 *--------------------------------------------------------------------- 2657 * Parse_File -- 2658 * Parse a file into its component parts, incorporating it into the 2659 * current dependency graph. This is the main function and controls 2660 * almost every other function in this module 2661 * 2662 * Input: 2663 * name the name of the file being read 2664 * stream Stream open to makefile to parse 2665 * 2666 * Results: 2667 * None 2668 * 2669 * Side Effects: 2670 * Loads. Nodes are added to the list of all targets, nodes and links 2671 * are added to the dependency graph. etc. etc. etc. 2672 *--------------------------------------------------------------------- 2673 */ 2674 void 2675 Parse_File(char *name, FILE *stream) 2676 { 2677 char *cp, /* pointer into the line */ 2678 *line; /* the line we're working on */ 2679 2680 inLine = FALSE; 2681 fatals = 0; 2682 2683 curFile.fname = name; 2684 curFile.F = stream; 2685 curFile.lineno = 0; 2686 2687 ParseSetParseFile(curFile.fname); 2688 2689 do { 2690 while ((line = ParseReadLine ()) != NULL) { 2691 if (*line == '.') { 2692 /* 2693 * Lines that begin with the special character are either 2694 * include or undef directives. 2695 */ 2696 for (cp = line + 1; isspace ((unsigned char)*cp); cp++) { 2697 continue; 2698 } 2699 if (strncmp(cp, "include", 7) == 0 || 2700 ((cp[0] == 's' || cp[0] == '-') && 2701 strncmp(&cp[1], "include", 7) == 0)) { 2702 ParseDoInclude (cp); 2703 goto nextLine; 2704 } else if (strncmp(cp, "undef", 5) == 0) { 2705 char *cp2; 2706 for (cp += 5; isspace((unsigned char) *cp); cp++) { 2707 continue; 2708 } 2709 2710 for (cp2 = cp; !isspace((unsigned char) *cp2) && 2711 (*cp2 != '\0'); cp2++) { 2712 continue; 2713 } 2714 2715 *cp2 = '\0'; 2716 2717 Var_Delete(cp, VAR_GLOBAL); 2718 goto nextLine; 2719 } 2720 } 2721 if (*line == '#') { 2722 /* If we're this far, the line must be a comment. */ 2723 goto nextLine; 2724 } 2725 2726 if (*line == '\t') { 2727 /* 2728 * If a line starts with a tab, it can only hope to be 2729 * a creation command. 2730 */ 2731 #ifndef POSIX 2732 shellCommand: 2733 #endif 2734 for (cp = line + 1; isspace ((unsigned char)*cp); cp++) { 2735 continue; 2736 } 2737 if (*cp) { 2738 if (inLine) { 2739 /* 2740 * So long as it's not a blank line and we're actually 2741 * in a dependency spec, add the command to the list of 2742 * commands of all targets in the dependency spec 2743 */ 2744 Lst_ForEach (targets, ParseAddCmd, cp); 2745 #ifdef CLEANUP 2746 Lst_AtEnd(targCmds, (ClientData) line); 2747 #endif 2748 continue; 2749 } else { 2750 Parse_Error (PARSE_FATAL, 2751 "Unassociated shell command \"%s\"", 2752 cp); 2753 } 2754 } 2755 #ifdef SYSVINCLUDE 2756 } else if (((strncmp(line, "include", 7) == 0 && 2757 isspace((unsigned char) line[7])) || 2758 ((line[0] == 's' || line[0] == '-') && 2759 strncmp(&line[1], "include", 7) == 0 && 2760 isspace((unsigned char) line[8]))) && 2761 strchr(line, ':') == NULL) { 2762 /* 2763 * It's an S3/S5-style "include". 2764 */ 2765 ParseTraditionalInclude (line); 2766 goto nextLine; 2767 #endif 2768 } else if (Parse_IsVar (line)) { 2769 ParseFinishLine(); 2770 Parse_DoVar (line, VAR_GLOBAL); 2771 } else { 2772 /* 2773 * We now know it's a dependency line so it needs to have all 2774 * variables expanded before being parsed. Tell the variable 2775 * module to complain if some variable is undefined... 2776 * To make life easier on novices, if the line is indented we 2777 * first make sure the line has a dependency operator in it. 2778 * If it doesn't have an operator and we're in a dependency 2779 * line's script, we assume it's actually a shell command 2780 * and add it to the current list of targets. 2781 */ 2782 #ifndef POSIX 2783 Boolean nonSpace = FALSE; 2784 #endif 2785 2786 cp = line; 2787 if (isspace((unsigned char) line[0])) { 2788 while ((*cp != '\0') && isspace((unsigned char) *cp)) { 2789 cp++; 2790 } 2791 if (*cp == '\0') { 2792 goto nextLine; 2793 } 2794 #ifndef POSIX 2795 while (*cp && (ParseIsEscaped(line, cp) || 2796 (*cp != ':') && (*cp != '!'))) { 2797 nonSpace = TRUE; 2798 cp++; 2799 } 2800 #endif 2801 } 2802 2803 #ifndef POSIX 2804 if (*cp == '\0') { 2805 if (inLine) { 2806 Parse_Error (PARSE_WARNING, 2807 "Shell command needs a leading tab"); 2808 goto shellCommand; 2809 } else if (nonSpace) { 2810 Parse_Error (PARSE_FATAL, "Missing operator"); 2811 } 2812 } else { 2813 #endif 2814 ParseFinishLine(); 2815 2816 cp = Var_Subst (NULL, line, VAR_CMD, TRUE); 2817 free (line); 2818 line = cp; 2819 2820 /* 2821 * Need a non-circular list for the target nodes 2822 */ 2823 if (targets) 2824 Lst_Destroy(targets, NOFREE); 2825 2826 targets = Lst_Init (FALSE); 2827 inLine = TRUE; 2828 2829 ParseDoDependency (line); 2830 #ifndef POSIX 2831 } 2832 #endif 2833 } 2834 2835 nextLine: 2836 2837 free (line); 2838 } 2839 /* 2840 * Reached EOF, but it may be just EOF of an include file... 2841 */ 2842 } while (ParseEOF(1) == CONTINUE); 2843 2844 /* 2845 * Make sure conditionals are clean 2846 */ 2847 Cond_End(); 2848 2849 if (fatals) { 2850 (void)fprintf(stderr, 2851 "%s: Fatal errors encountered -- cannot continue\n", 2852 progname); 2853 PrintOnError(NULL); 2854 exit (1); 2855 } 2856 } 2857 2858 /*- 2859 *--------------------------------------------------------------------- 2860 * Parse_Init -- 2861 * initialize the parsing module 2862 * 2863 * Results: 2864 * none 2865 * 2866 * Side Effects: 2867 * the parseIncPath list is initialized... 2868 *--------------------------------------------------------------------- 2869 */ 2870 void 2871 Parse_Init(void) 2872 { 2873 mainNode = NILGNODE; 2874 parseIncPath = Lst_Init (FALSE); 2875 sysIncPath = Lst_Init (FALSE); 2876 defIncPath = Lst_Init (FALSE); 2877 includes = Lst_Init (FALSE); 2878 #ifdef CLEANUP 2879 targCmds = Lst_Init (FALSE); 2880 #endif 2881 } 2882 2883 void 2884 Parse_End(void) 2885 { 2886 #ifdef CLEANUP 2887 Lst_Destroy(targCmds, (void (*)(ClientData))) free; 2888 if (targets) 2889 Lst_Destroy(targets, NOFREE); 2890 Lst_Destroy(defIncPath, Dir_Destroy); 2891 Lst_Destroy(sysIncPath, Dir_Destroy); 2892 Lst_Destroy(parseIncPath, Dir_Destroy); 2893 Lst_Destroy(includes, NOFREE); /* Should be empty now */ 2894 #endif 2895 } 2896 2897 2898 /*- 2899 *----------------------------------------------------------------------- 2900 * Parse_MainName -- 2901 * Return a Lst of the main target to create for main()'s sake. If 2902 * no such target exists, we Punt with an obnoxious error message. 2903 * 2904 * Results: 2905 * A Lst of the single node to create. 2906 * 2907 * Side Effects: 2908 * None. 2909 * 2910 *----------------------------------------------------------------------- 2911 */ 2912 Lst 2913 Parse_MainName(void) 2914 { 2915 Lst mainList; /* result list */ 2916 2917 mainList = Lst_Init (FALSE); 2918 2919 if (mainNode == NILGNODE) { 2920 Punt ("no target to make."); 2921 /*NOTREACHED*/ 2922 } else if (mainNode->type & OP_DOUBLEDEP) { 2923 (void) Lst_AtEnd (mainList, (ClientData)mainNode); 2924 Lst_Concat(mainList, mainNode->cohorts, LST_CONCNEW); 2925 } 2926 else 2927 (void) Lst_AtEnd (mainList, (ClientData)mainNode); 2928 Var_Append(".TARGETS", mainNode->name, VAR_GLOBAL); 2929 return (mainList); 2930 } 2931 2932 /*- 2933 *----------------------------------------------------------------------- 2934 * ParseMark -- 2935 * Add the filename and lineno to the GNode so that we remember 2936 * where it was first defined. 2937 * 2938 * Side Effects: 2939 * None. 2940 * 2941 *----------------------------------------------------------------------- 2942 */ 2943 static void 2944 ParseMark(GNode *gn) 2945 { 2946 gn->fname = strdup(curFile.fname); 2947 gn->lineno = curFile.lineno; 2948 } 2949