1 /* $NetBSD: parse.c,v 1.164 2010/05/24 21:04:49 sjg Exp $ */ 2 3 /* 4 * Copyright (c) 1988, 1989, 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Adam de Boor. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 /* 36 * Copyright (c) 1989 by Berkeley Softworks 37 * All rights reserved. 38 * 39 * This code is derived from software contributed to Berkeley by 40 * Adam de Boor. 41 * 42 * Redistribution and use in source and binary forms, with or without 43 * modification, are permitted provided that the following conditions 44 * are met: 45 * 1. Redistributions of source code must retain the above copyright 46 * notice, this list of conditions and the following disclaimer. 47 * 2. Redistributions in binary form must reproduce the above copyright 48 * notice, this list of conditions and the following disclaimer in the 49 * documentation and/or other materials provided with the distribution. 50 * 3. All advertising materials mentioning features or use of this software 51 * must display the following acknowledgement: 52 * This product includes software developed by the University of 53 * California, Berkeley and its contributors. 54 * 4. Neither the name of the University nor the names of its contributors 55 * may be used to endorse or promote products derived from this software 56 * without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 68 * SUCH DAMAGE. 69 */ 70 71 #ifndef MAKE_NATIVE 72 static char rcsid[] = "$NetBSD: parse.c,v 1.164 2010/05/24 21:04:49 sjg Exp $"; 73 #else 74 #include <sys/cdefs.h> 75 #ifndef lint 76 #if 0 77 static char sccsid[] = "@(#)parse.c 8.3 (Berkeley) 3/19/94"; 78 #else 79 __RCSID("$NetBSD: parse.c,v 1.164 2010/05/24 21:04:49 sjg Exp $"); 80 #endif 81 #endif /* not lint */ 82 #endif 83 84 /*- 85 * parse.c -- 86 * Functions to parse a makefile. 87 * 88 * One function, Parse_Init, must be called before any functions 89 * in this module are used. After that, the function Parse_File is the 90 * main entry point and controls most of the other functions in this 91 * module. 92 * 93 * Most important structures are kept in Lsts. Directories for 94 * the .include "..." function are kept in the 'parseIncPath' Lst, while 95 * those for the .include <...> are kept in the 'sysIncPath' Lst. The 96 * targets currently being defined are kept in the 'targets' Lst. 97 * 98 * The variables 'fname' and 'lineno' are used to track the name 99 * of the current file and the line number in that file so that error 100 * messages can be more meaningful. 101 * 102 * Interface: 103 * Parse_Init Initialization function which must be 104 * called before anything else in this module 105 * is used. 106 * 107 * Parse_End Cleanup the module 108 * 109 * Parse_File Function used to parse a makefile. It must 110 * be given the name of the file, which should 111 * already have been opened, and a function 112 * to call to read a character from the file. 113 * 114 * Parse_IsVar Returns TRUE if the given line is a 115 * variable assignment. Used by MainParseArgs 116 * to determine if an argument is a target 117 * or a variable assignment. Used internally 118 * for pretty much the same thing... 119 * 120 * Parse_Error Function called when an error occurs in 121 * parsing. Used by the variable and 122 * conditional modules. 123 * Parse_MainName Returns a Lst of the main target to create. 124 */ 125 126 #include <ctype.h> 127 #include <errno.h> 128 #include <fcntl.h> 129 #include <stdarg.h> 130 #include <stdio.h> 131 132 #include "make.h" 133 #include "hash.h" 134 #include "dir.h" 135 #include "job.h" 136 #include "buf.h" 137 #include "pathnames.h" 138 139 /* 140 * These values are returned by ParseEOF to tell Parse_File whether to 141 * CONTINUE parsing, i.e. it had only reached the end of an include file, 142 * or if it's DONE. 143 */ 144 #define CONTINUE 1 145 #define DONE 0 146 static Lst targets; /* targets we're working on */ 147 #ifdef CLEANUP 148 static Lst targCmds; /* command lines for targets */ 149 #endif 150 static Boolean inLine; /* true if currently in a dependency 151 * line or its commands */ 152 static int fatals = 0; 153 154 static GNode *mainNode; /* The main target to create. This is the 155 * first target on the first dependency 156 * line in the first makefile */ 157 typedef struct IFile { 158 const char *fname; /* name of file */ 159 int lineno; /* current line number in file */ 160 int first_lineno; /* line number of start of text */ 161 int fd; /* the open file */ 162 int cond_depth; /* 'if' nesting when file opened */ 163 char *P_str; /* point to base of string buffer */ 164 char *P_ptr; /* point to next char of string buffer */ 165 char *P_end; /* point to the end of string buffer */ 166 int P_buflen; /* current size of file buffer */ 167 char *(*nextbuf)(void *); /* Function to get more data */ 168 void *nextbuf_arg; /* Opaque arg for nextbuf() */ 169 } IFile; 170 171 #define IFILE_BUFLEN 0x8000 172 static IFile *curFile; 173 174 175 /* 176 * Definitions for handling #include specifications 177 */ 178 179 static Lst includes; /* stack of IFiles generated by .includes */ 180 Lst parseIncPath; /* list of directories for "..." includes */ 181 Lst sysIncPath; /* list of directories for <...> includes */ 182 Lst defIncPath; /* default directories for <...> includes */ 183 184 /*- 185 * specType contains the SPECial TYPE of the current target. It is 186 * Not if the target is unspecial. If it *is* special, however, the children 187 * are linked as children of the parent but not vice versa. This variable is 188 * set in ParseDoDependency 189 */ 190 typedef enum { 191 Begin, /* .BEGIN */ 192 Default, /* .DEFAULT */ 193 End, /* .END */ 194 dotError, /* .ERROR */ 195 Ignore, /* .IGNORE */ 196 Includes, /* .INCLUDES */ 197 Interrupt, /* .INTERRUPT */ 198 Libs, /* .LIBS */ 199 MFlags, /* .MFLAGS or .MAKEFLAGS */ 200 Main, /* .MAIN and we don't have anything user-specified to 201 * make */ 202 NoExport, /* .NOEXPORT */ 203 NoPath, /* .NOPATH */ 204 Not, /* Not special */ 205 NotParallel, /* .NOTPARALLEL */ 206 Null, /* .NULL */ 207 ExObjdir, /* .OBJDIR */ 208 Order, /* .ORDER */ 209 Parallel, /* .PARALLEL */ 210 ExPath, /* .PATH */ 211 Phony, /* .PHONY */ 212 #ifdef POSIX 213 Posix, /* .POSIX */ 214 #endif 215 Precious, /* .PRECIOUS */ 216 ExShell, /* .SHELL */ 217 Silent, /* .SILENT */ 218 SingleShell, /* .SINGLESHELL */ 219 Suffixes, /* .SUFFIXES */ 220 Wait, /* .WAIT */ 221 Attribute /* Generic attribute */ 222 } ParseSpecial; 223 224 static ParseSpecial specType; 225 226 #define LPAREN '(' 227 #define RPAREN ')' 228 /* 229 * Predecessor node for handling .ORDER. Initialized to NULL when .ORDER 230 * seen, then set to each successive source on the line. 231 */ 232 static GNode *predecessor; 233 234 /* 235 * The parseKeywords table is searched using binary search when deciding 236 * if a target or source is special. The 'spec' field is the ParseSpecial 237 * type of the keyword ("Not" if the keyword isn't special as a target) while 238 * the 'op' field is the operator to apply to the list of targets if the 239 * keyword is used as a source ("0" if the keyword isn't special as a source) 240 */ 241 static struct { 242 const char *name; /* Name of keyword */ 243 ParseSpecial spec; /* Type when used as a target */ 244 int op; /* Operator when used as a source */ 245 } parseKeywords[] = { 246 { ".BEGIN", Begin, 0 }, 247 { ".DEFAULT", Default, 0 }, 248 { ".END", End, 0 }, 249 { ".ERROR", dotError, 0 }, 250 { ".EXEC", Attribute, OP_EXEC }, 251 { ".IGNORE", Ignore, OP_IGNORE }, 252 { ".INCLUDES", Includes, 0 }, 253 { ".INTERRUPT", Interrupt, 0 }, 254 { ".INVISIBLE", Attribute, OP_INVISIBLE }, 255 { ".JOIN", Attribute, OP_JOIN }, 256 { ".LIBS", Libs, 0 }, 257 { ".MADE", Attribute, OP_MADE }, 258 { ".MAIN", Main, 0 }, 259 { ".MAKE", Attribute, OP_MAKE }, 260 { ".MAKEFLAGS", MFlags, 0 }, 261 { ".MFLAGS", MFlags, 0 }, 262 { ".NOPATH", NoPath, OP_NOPATH }, 263 { ".NOTMAIN", Attribute, OP_NOTMAIN }, 264 { ".NOTPARALLEL", NotParallel, 0 }, 265 { ".NO_PARALLEL", NotParallel, 0 }, 266 { ".NULL", Null, 0 }, 267 { ".OBJDIR", ExObjdir, 0 }, 268 { ".OPTIONAL", Attribute, OP_OPTIONAL }, 269 { ".ORDER", Order, 0 }, 270 { ".PARALLEL", Parallel, 0 }, 271 { ".PATH", ExPath, 0 }, 272 { ".PHONY", Phony, OP_PHONY }, 273 #ifdef POSIX 274 { ".POSIX", Posix, 0 }, 275 #endif 276 { ".PRECIOUS", Precious, OP_PRECIOUS }, 277 { ".RECURSIVE", Attribute, OP_MAKE }, 278 { ".SHELL", ExShell, 0 }, 279 { ".SILENT", Silent, OP_SILENT }, 280 { ".SINGLESHELL", SingleShell, 0 }, 281 { ".SUFFIXES", Suffixes, 0 }, 282 { ".USE", Attribute, OP_USE }, 283 { ".USEBEFORE", Attribute, OP_USEBEFORE }, 284 { ".WAIT", Wait, 0 }, 285 }; 286 287 static int ParseIsEscaped(const char *, const char *); 288 static void ParseErrorInternal(const char *, size_t, int, const char *, ...) 289 __attribute__((__format__(__printf__, 4, 5))); 290 static void ParseVErrorInternal(FILE *, const char *, size_t, int, const char *, va_list) 291 __attribute__((__format__(__printf__, 5, 0))); 292 static int ParseFindKeyword(const char *); 293 static int ParseLinkSrc(void *, void *); 294 static int ParseDoOp(void *, void *); 295 static void ParseDoSrc(int, const char *); 296 static int ParseFindMain(void *, void *); 297 static int ParseAddDir(void *, void *); 298 static int ParseClearPath(void *, void *); 299 static void ParseDoDependency(char *); 300 static int ParseAddCmd(void *, void *); 301 static void ParseHasCommands(void *); 302 static void ParseDoInclude(char *); 303 static void ParseSetParseFile(const char *); 304 #ifdef SYSVINCLUDE 305 static void ParseTraditionalInclude(char *); 306 #endif 307 static int ParseEOF(void); 308 static char *ParseReadLine(void); 309 static void ParseFinishLine(void); 310 static void ParseMark(GNode *); 311 312 extern int maxJobs; 313 314 315 /*- 316 *---------------------------------------------------------------------- 317 * ParseIsEscaped -- 318 * Check if the current character is escaped on the current line 319 * 320 * Results: 321 * 0 if the character is not backslash escaped, 1 otherwise 322 * 323 * Side Effects: 324 * None 325 *---------------------------------------------------------------------- 326 */ 327 static int 328 ParseIsEscaped(const char *line, const char *c) 329 { 330 int active = 0; 331 for (;;) { 332 if (line == c) 333 return active; 334 if (*--c != '\\') 335 return active; 336 active = !active; 337 } 338 } 339 340 /*- 341 *---------------------------------------------------------------------- 342 * ParseFindKeyword -- 343 * Look in the table of keywords for one matching the given string. 344 * 345 * Input: 346 * str String to find 347 * 348 * Results: 349 * The index of the keyword, or -1 if it isn't there. 350 * 351 * Side Effects: 352 * None 353 *---------------------------------------------------------------------- 354 */ 355 static int 356 ParseFindKeyword(const char *str) 357 { 358 int start, end, cur; 359 int diff; 360 361 start = 0; 362 end = (sizeof(parseKeywords)/sizeof(parseKeywords[0])) - 1; 363 364 do { 365 cur = start + ((end - start) / 2); 366 diff = strcmp(str, parseKeywords[cur].name); 367 368 if (diff == 0) { 369 return (cur); 370 } else if (diff < 0) { 371 end = cur - 1; 372 } else { 373 start = cur + 1; 374 } 375 } while (start <= end); 376 return (-1); 377 } 378 379 /*- 380 * ParseVErrorInternal -- 381 * Error message abort function for parsing. Prints out the context 382 * of the error (line number and file) as well as the message with 383 * two optional arguments. 384 * 385 * Results: 386 * None 387 * 388 * Side Effects: 389 * "fatals" is incremented if the level is PARSE_FATAL. 390 */ 391 /* VARARGS */ 392 static void 393 ParseVErrorInternal(FILE *f, const char *cfname, size_t clineno, int type, 394 const char *fmt, va_list ap) 395 { 396 static Boolean fatal_warning_error_printed = FALSE; 397 398 (void)fprintf(f, "%s: ", progname); 399 400 if (cfname != NULL) { 401 (void)fprintf(f, "\""); 402 if (*cfname != '/' && strcmp(cfname, "(stdin)") != 0) { 403 char *cp; 404 const char *dir; 405 406 /* 407 * Nothing is more anoying than not knowing 408 * which Makefile is the culprit. 409 */ 410 dir = Var_Value(".PARSEDIR", VAR_GLOBAL, &cp); 411 if (dir == NULL || *dir == '\0' || 412 (*dir == '.' && dir[1] == '\0')) 413 dir = Var_Value(".CURDIR", VAR_GLOBAL, &cp); 414 if (dir == NULL) 415 dir = "."; 416 417 (void)fprintf(f, "%s/%s", dir, cfname); 418 } else 419 (void)fprintf(f, "%s", cfname); 420 421 (void)fprintf(f, "\" line %d: ", (int)clineno); 422 } 423 if (type == PARSE_WARNING) 424 (void)fprintf(f, "warning: "); 425 (void)vfprintf(f, fmt, ap); 426 (void)fprintf(f, "\n"); 427 (void)fflush(f); 428 if (type == PARSE_FATAL || parseWarnFatal) 429 fatals += 1; 430 if (parseWarnFatal && !fatal_warning_error_printed) { 431 Error("parsing warnings being treated as errors"); 432 fatal_warning_error_printed = TRUE; 433 } 434 } 435 436 /*- 437 * ParseErrorInternal -- 438 * Error function 439 * 440 * Results: 441 * None 442 * 443 * Side Effects: 444 * None 445 */ 446 /* VARARGS */ 447 static void 448 ParseErrorInternal(const char *cfname, size_t clineno, int type, 449 const char *fmt, ...) 450 { 451 va_list ap; 452 453 va_start(ap, fmt); 454 (void)fflush(stdout); 455 ParseVErrorInternal(stderr, cfname, clineno, type, fmt, ap); 456 va_end(ap); 457 458 if (debug_file != stderr && debug_file != stdout) { 459 va_start(ap, fmt); 460 ParseVErrorInternal(debug_file, cfname, clineno, type, fmt, ap); 461 va_end(ap); 462 } 463 } 464 465 /*- 466 * Parse_Error -- 467 * External interface to ParseErrorInternal; uses the default filename 468 * Line number. 469 * 470 * Results: 471 * None 472 * 473 * Side Effects: 474 * None 475 */ 476 /* VARARGS */ 477 void 478 Parse_Error(int type, const char *fmt, ...) 479 { 480 va_list ap; 481 const char *fname; 482 size_t lineno; 483 484 if (curFile == NULL) { 485 fname = NULL; 486 lineno = 0; 487 } else { 488 fname = curFile->fname; 489 lineno = curFile->lineno; 490 } 491 492 va_start(ap, fmt); 493 (void)fflush(stdout); 494 ParseVErrorInternal(stderr, fname, lineno, type, fmt, ap); 495 va_end(ap); 496 497 if (debug_file != stderr && debug_file != stdout) { 498 va_start(ap, fmt); 499 ParseVErrorInternal(debug_file, fname, lineno, type, fmt, ap); 500 va_end(ap); 501 } 502 } 503 504 505 /* 506 * ParseMessage 507 * Parse a .info .warning or .error directive 508 * 509 * The input is the line minus the ".". We substitute 510 * variables, print the message and exit(1) (for .error) or just print 511 * a warning if the directive is malformed. 512 */ 513 static Boolean 514 ParseMessage(char *line) 515 { 516 int mtype; 517 518 switch(*line) { 519 case 'i': 520 mtype = 0; 521 break; 522 case 'w': 523 mtype = PARSE_WARNING; 524 break; 525 case 'e': 526 mtype = PARSE_FATAL; 527 break; 528 default: 529 Parse_Error(PARSE_WARNING, "invalid syntax: \".%s\"", line); 530 return FALSE; 531 } 532 533 while (isalpha((u_char)*line)) 534 line++; 535 if (!isspace((u_char)*line)) 536 return FALSE; /* not for us */ 537 while (isspace((u_char)*line)) 538 line++; 539 540 line = Var_Subst(NULL, line, VAR_CMD, 0); 541 Parse_Error(mtype, "%s", line); 542 free(line); 543 544 if (mtype == PARSE_FATAL) { 545 /* Terminate immediately. */ 546 exit(1); 547 } 548 return TRUE; 549 } 550 551 /*- 552 *--------------------------------------------------------------------- 553 * ParseLinkSrc -- 554 * Link the parent node to its new child. Used in a Lst_ForEach by 555 * ParseDoDependency. If the specType isn't 'Not', the parent 556 * isn't linked as a parent of the child. 557 * 558 * Input: 559 * pgnp The parent node 560 * cgpn The child node 561 * 562 * Results: 563 * Always = 0 564 * 565 * Side Effects: 566 * New elements are added to the parents list of cgn and the 567 * children list of cgn. the unmade field of pgn is updated 568 * to reflect the additional child. 569 *--------------------------------------------------------------------- 570 */ 571 static int 572 ParseLinkSrc(void *pgnp, void *cgnp) 573 { 574 GNode *pgn = (GNode *)pgnp; 575 GNode *cgn = (GNode *)cgnp; 576 577 if ((pgn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (pgn->cohorts)) 578 pgn = (GNode *)Lst_Datum(Lst_Last(pgn->cohorts)); 579 (void)Lst_AtEnd(pgn->children, cgn); 580 if (specType == Not) 581 (void)Lst_AtEnd(cgn->parents, pgn); 582 pgn->unmade += 1; 583 if (DEBUG(PARSE)) { 584 fprintf(debug_file, "# ParseLinkSrc: added child %s - %s\n", pgn->name, cgn->name); 585 Targ_PrintNode(pgn, 0); 586 Targ_PrintNode(cgn, 0); 587 } 588 return (0); 589 } 590 591 /*- 592 *--------------------------------------------------------------------- 593 * ParseDoOp -- 594 * Apply the parsed operator to the given target node. Used in a 595 * Lst_ForEach call by ParseDoDependency once all targets have 596 * been found and their operator parsed. If the previous and new 597 * operators are incompatible, a major error is taken. 598 * 599 * Input: 600 * gnp The node to which the operator is to be applied 601 * opp The operator to apply 602 * 603 * Results: 604 * Always 0 605 * 606 * Side Effects: 607 * The type field of the node is altered to reflect any new bits in 608 * the op. 609 *--------------------------------------------------------------------- 610 */ 611 static int 612 ParseDoOp(void *gnp, void *opp) 613 { 614 GNode *gn = (GNode *)gnp; 615 int op = *(int *)opp; 616 /* 617 * If the dependency mask of the operator and the node don't match and 618 * the node has actually had an operator applied to it before, and 619 * the operator actually has some dependency information in it, complain. 620 */ 621 if (((op & OP_OPMASK) != (gn->type & OP_OPMASK)) && 622 !OP_NOP(gn->type) && !OP_NOP(op)) 623 { 624 Parse_Error(PARSE_FATAL, "Inconsistent operator for %s", gn->name); 625 return (1); 626 } 627 628 if ((op == OP_DOUBLEDEP) && ((gn->type & OP_OPMASK) == OP_DOUBLEDEP)) { 629 /* 630 * If the node was the object of a :: operator, we need to create a 631 * new instance of it for the children and commands on this dependency 632 * line. The new instance is placed on the 'cohorts' list of the 633 * initial one (note the initial one is not on its own cohorts list) 634 * and the new instance is linked to all parents of the initial 635 * instance. 636 */ 637 GNode *cohort; 638 639 /* 640 * Propagate copied bits to the initial node. They'll be propagated 641 * back to the rest of the cohorts later. 642 */ 643 gn->type |= op & ~OP_OPMASK; 644 645 cohort = Targ_FindNode(gn->name, TARG_NOHASH); 646 /* 647 * Make the cohort invisible as well to avoid duplicating it into 648 * other variables. True, parents of this target won't tend to do 649 * anything with their local variables, but better safe than 650 * sorry. (I think this is pointless now, since the relevant list 651 * traversals will no longer see this node anyway. -mycroft) 652 */ 653 cohort->type = op | OP_INVISIBLE; 654 (void)Lst_AtEnd(gn->cohorts, cohort); 655 cohort->centurion = gn; 656 gn->unmade_cohorts += 1; 657 snprintf(cohort->cohort_num, sizeof cohort->cohort_num, "#%d", 658 gn->unmade_cohorts); 659 } else { 660 /* 661 * We don't want to nuke any previous flags (whatever they were) so we 662 * just OR the new operator into the old 663 */ 664 gn->type |= op; 665 } 666 667 return (0); 668 } 669 670 /*- 671 *--------------------------------------------------------------------- 672 * ParseDoSrc -- 673 * Given the name of a source, figure out if it is an attribute 674 * and apply it to the targets if it is. Else decide if there is 675 * some attribute which should be applied *to* the source because 676 * of some special target and apply it if so. Otherwise, make the 677 * source be a child of the targets in the list 'targets' 678 * 679 * Input: 680 * tOp operator (if any) from special targets 681 * src name of the source to handle 682 * 683 * Results: 684 * None 685 * 686 * Side Effects: 687 * Operator bits may be added to the list of targets or to the source. 688 * The targets may have a new source added to their lists of children. 689 *--------------------------------------------------------------------- 690 */ 691 static void 692 ParseDoSrc(int tOp, const char *src) 693 { 694 GNode *gn = NULL; 695 static int wait_number = 0; 696 char wait_src[16]; 697 698 if (*src == '.' && isupper ((unsigned char)src[1])) { 699 int keywd = ParseFindKeyword(src); 700 if (keywd != -1) { 701 int op = parseKeywords[keywd].op; 702 if (op != 0) { 703 Lst_ForEach(targets, ParseDoOp, &op); 704 return; 705 } 706 if (parseKeywords[keywd].spec == Wait) { 707 /* 708 * We add a .WAIT node in the dependency list. 709 * After any dynamic dependencies (and filename globbing) 710 * have happened, it is given a dependency on the each 711 * previous child back to and previous .WAIT node. 712 * The next child won't be scheduled until the .WAIT node 713 * is built. 714 * We give each .WAIT node a unique name (mainly for diag). 715 */ 716 snprintf(wait_src, sizeof wait_src, ".WAIT_%u", ++wait_number); 717 gn = Targ_FindNode(wait_src, TARG_NOHASH); 718 gn->type = OP_WAIT | OP_PHONY | OP_DEPENDS | OP_NOTMAIN; 719 Lst_ForEach(targets, ParseLinkSrc, gn); 720 return; 721 } 722 } 723 } 724 725 switch (specType) { 726 case Main: 727 /* 728 * If we have noted the existence of a .MAIN, it means we need 729 * to add the sources of said target to the list of things 730 * to create. The string 'src' is likely to be free, so we 731 * must make a new copy of it. Note that this will only be 732 * invoked if the user didn't specify a target on the command 733 * line. This is to allow #ifmake's to succeed, or something... 734 */ 735 (void)Lst_AtEnd(create, bmake_strdup(src)); 736 /* 737 * Add the name to the .TARGETS variable as well, so the user can 738 * employ that, if desired. 739 */ 740 Var_Append(".TARGETS", src, VAR_GLOBAL); 741 return; 742 743 case Order: 744 /* 745 * Create proper predecessor/successor links between the previous 746 * source and the current one. 747 */ 748 gn = Targ_FindNode(src, TARG_CREATE); 749 if (predecessor != NULL) { 750 (void)Lst_AtEnd(predecessor->order_succ, gn); 751 (void)Lst_AtEnd(gn->order_pred, predecessor); 752 if (DEBUG(PARSE)) { 753 fprintf(debug_file, "# ParseDoSrc: added Order dependency %s - %s\n", 754 predecessor->name, gn->name); 755 Targ_PrintNode(predecessor, 0); 756 Targ_PrintNode(gn, 0); 757 } 758 } 759 /* 760 * The current source now becomes the predecessor for the next one. 761 */ 762 predecessor = gn; 763 break; 764 765 default: 766 /* 767 * If the source is not an attribute, we need to find/create 768 * a node for it. After that we can apply any operator to it 769 * from a special target or link it to its parents, as 770 * appropriate. 771 * 772 * In the case of a source that was the object of a :: operator, 773 * the attribute is applied to all of its instances (as kept in 774 * the 'cohorts' list of the node) or all the cohorts are linked 775 * to all the targets. 776 */ 777 778 /* Find/create the 'src' node and attach to all targets */ 779 gn = Targ_FindNode(src, TARG_CREATE); 780 if (tOp) { 781 gn->type |= tOp; 782 } else { 783 Lst_ForEach(targets, ParseLinkSrc, gn); 784 } 785 break; 786 } 787 } 788 789 /*- 790 *----------------------------------------------------------------------- 791 * ParseFindMain -- 792 * Find a real target in the list and set it to be the main one. 793 * Called by ParseDoDependency when a main target hasn't been found 794 * yet. 795 * 796 * Input: 797 * gnp Node to examine 798 * 799 * Results: 800 * 0 if main not found yet, 1 if it is. 801 * 802 * Side Effects: 803 * mainNode is changed and Targ_SetMain is called. 804 * 805 *----------------------------------------------------------------------- 806 */ 807 static int 808 ParseFindMain(void *gnp, void *dummy) 809 { 810 GNode *gn = (GNode *)gnp; 811 if ((gn->type & OP_NOTARGET) == 0) { 812 mainNode = gn; 813 Targ_SetMain(gn); 814 return (dummy ? 1 : 1); 815 } else { 816 return (dummy ? 0 : 0); 817 } 818 } 819 820 /*- 821 *----------------------------------------------------------------------- 822 * ParseAddDir -- 823 * Front-end for Dir_AddDir to make sure Lst_ForEach keeps going 824 * 825 * Results: 826 * === 0 827 * 828 * Side Effects: 829 * See Dir_AddDir. 830 * 831 *----------------------------------------------------------------------- 832 */ 833 static int 834 ParseAddDir(void *path, void *name) 835 { 836 (void)Dir_AddDir((Lst) path, (char *)name); 837 return(0); 838 } 839 840 /*- 841 *----------------------------------------------------------------------- 842 * ParseClearPath -- 843 * Front-end for Dir_ClearPath to make sure Lst_ForEach keeps going 844 * 845 * Results: 846 * === 0 847 * 848 * Side Effects: 849 * See Dir_ClearPath 850 * 851 *----------------------------------------------------------------------- 852 */ 853 static int 854 ParseClearPath(void *path, void *dummy) 855 { 856 Dir_ClearPath((Lst) path); 857 return(dummy ? 0 : 0); 858 } 859 860 /*- 861 *--------------------------------------------------------------------- 862 * ParseDoDependency -- 863 * Parse the dependency line in line. 864 * 865 * Input: 866 * line the line to parse 867 * 868 * Results: 869 * None 870 * 871 * Side Effects: 872 * The nodes of the sources are linked as children to the nodes of the 873 * targets. Some nodes may be created. 874 * 875 * We parse a dependency line by first extracting words from the line and 876 * finding nodes in the list of all targets with that name. This is done 877 * until a character is encountered which is an operator character. Currently 878 * these are only ! and :. At this point the operator is parsed and the 879 * pointer into the line advanced until the first source is encountered. 880 * The parsed operator is applied to each node in the 'targets' list, 881 * which is where the nodes found for the targets are kept, by means of 882 * the ParseDoOp function. 883 * The sources are read in much the same way as the targets were except 884 * that now they are expanded using the wildcarding scheme of the C-Shell 885 * and all instances of the resulting words in the list of all targets 886 * are found. Each of the resulting nodes is then linked to each of the 887 * targets as one of its children. 888 * Certain targets are handled specially. These are the ones detailed 889 * by the specType variable. 890 * The storing of transformation rules is also taken care of here. 891 * A target is recognized as a transformation rule by calling 892 * Suff_IsTransform. If it is a transformation rule, its node is gotten 893 * from the suffix module via Suff_AddTransform rather than the standard 894 * Targ_FindNode in the target module. 895 *--------------------------------------------------------------------- 896 */ 897 static void 898 ParseDoDependency(char *line) 899 { 900 char *cp; /* our current position */ 901 GNode *gn = NULL; /* a general purpose temporary node */ 902 int op; /* the operator on the line */ 903 char savec; /* a place to save a character */ 904 Lst paths; /* List of search paths to alter when parsing 905 * a list of .PATH targets */ 906 int tOp; /* operator from special target */ 907 Lst sources; /* list of archive source names after 908 * expansion */ 909 Lst curTargs; /* list of target names to be found and added 910 * to the targets list */ 911 char *lstart = line; 912 913 if (DEBUG(PARSE)) 914 fprintf(debug_file, "ParseDoDependency(%s)\n", line); 915 tOp = 0; 916 917 specType = Not; 918 paths = (Lst)NULL; 919 920 curTargs = Lst_Init(FALSE); 921 922 do { 923 for (cp = line; *cp && (ParseIsEscaped(lstart, cp) || 924 !(isspace((unsigned char)*cp) || 925 *cp == '!' || *cp == ':' || *cp == LPAREN)); 926 cp++) { 927 if (*cp == '$') { 928 /* 929 * Must be a dynamic source (would have been expanded 930 * otherwise), so call the Var module to parse the puppy 931 * so we can safely advance beyond it...There should be 932 * no errors in this, as they would have been discovered 933 * in the initial Var_Subst and we wouldn't be here. 934 */ 935 int length; 936 void *freeIt; 937 char *result; 938 939 result = Var_Parse(cp, VAR_CMD, TRUE, &length, &freeIt); 940 if (freeIt) 941 free(freeIt); 942 cp += length-1; 943 } 944 } 945 946 if (!ParseIsEscaped(lstart, cp) && *cp == LPAREN) { 947 /* 948 * Archives must be handled specially to make sure the OP_ARCHV 949 * flag is set in their 'type' field, for one thing, and because 950 * things like "archive(file1.o file2.o file3.o)" are permissible. 951 * Arch_ParseArchive will set 'line' to be the first non-blank 952 * after the archive-spec. It creates/finds nodes for the members 953 * and places them on the given list, returning SUCCESS if all 954 * went well and FAILURE if there was an error in the 955 * specification. On error, line should remain untouched. 956 */ 957 if (Arch_ParseArchive(&line, targets, VAR_CMD) != SUCCESS) { 958 Parse_Error(PARSE_FATAL, 959 "Error in archive specification: \"%s\"", line); 960 goto out; 961 } else { 962 continue; 963 } 964 } 965 savec = *cp; 966 967 if (!*cp) { 968 /* 969 * Ending a dependency line without an operator is a Bozo 970 * no-no. As a heuristic, this is also often triggered by 971 * undetected conflicts from cvs/rcs merges. 972 */ 973 if ((strncmp(line, "<<<<<<", 6) == 0) || 974 (strncmp(line, "======", 6) == 0) || 975 (strncmp(line, ">>>>>>", 6) == 0)) 976 Parse_Error(PARSE_FATAL, 977 "Makefile appears to contain unresolved cvs/rcs/??? merge conflicts"); 978 else 979 Parse_Error(PARSE_FATAL, lstart[0] == '.' ? "Unknown directive" 980 : "Need an operator"); 981 goto out; 982 } 983 *cp = '\0'; 984 985 /* 986 * Have a word in line. See if it's a special target and set 987 * specType to match it. 988 */ 989 if (*line == '.' && isupper ((unsigned char)line[1])) { 990 /* 991 * See if the target is a special target that must have it 992 * or its sources handled specially. 993 */ 994 int keywd = ParseFindKeyword(line); 995 if (keywd != -1) { 996 if (specType == ExPath && parseKeywords[keywd].spec != ExPath) { 997 Parse_Error(PARSE_FATAL, "Mismatched special targets"); 998 goto out; 999 } 1000 1001 specType = parseKeywords[keywd].spec; 1002 tOp = parseKeywords[keywd].op; 1003 1004 /* 1005 * Certain special targets have special semantics: 1006 * .PATH Have to set the dirSearchPath 1007 * variable too 1008 * .MAIN Its sources are only used if 1009 * nothing has been specified to 1010 * create. 1011 * .DEFAULT Need to create a node to hang 1012 * commands on, but we don't want 1013 * it in the graph, nor do we want 1014 * it to be the Main Target, so we 1015 * create it, set OP_NOTMAIN and 1016 * add it to the list, setting 1017 * DEFAULT to the new node for 1018 * later use. We claim the node is 1019 * A transformation rule to make 1020 * life easier later, when we'll 1021 * use Make_HandleUse to actually 1022 * apply the .DEFAULT commands. 1023 * .PHONY The list of targets 1024 * .NOPATH Don't search for file in the path 1025 * .BEGIN 1026 * .END 1027 * .ERROR 1028 * .INTERRUPT Are not to be considered the 1029 * main target. 1030 * .NOTPARALLEL Make only one target at a time. 1031 * .SINGLESHELL Create a shell for each command. 1032 * .ORDER Must set initial predecessor to NULL 1033 */ 1034 switch (specType) { 1035 case ExPath: 1036 if (paths == NULL) { 1037 paths = Lst_Init(FALSE); 1038 } 1039 (void)Lst_AtEnd(paths, dirSearchPath); 1040 break; 1041 case Main: 1042 if (!Lst_IsEmpty(create)) { 1043 specType = Not; 1044 } 1045 break; 1046 case Begin: 1047 case End: 1048 case dotError: 1049 case Interrupt: 1050 gn = Targ_FindNode(line, TARG_CREATE); 1051 gn->type |= OP_NOTMAIN|OP_SPECIAL; 1052 (void)Lst_AtEnd(targets, gn); 1053 break; 1054 case Default: 1055 gn = Targ_NewGN(".DEFAULT"); 1056 gn->type |= (OP_NOTMAIN|OP_TRANSFORM); 1057 (void)Lst_AtEnd(targets, gn); 1058 DEFAULT = gn; 1059 break; 1060 case NotParallel: 1061 maxJobs = 1; 1062 break; 1063 case SingleShell: 1064 compatMake = TRUE; 1065 break; 1066 case Order: 1067 predecessor = NULL; 1068 break; 1069 default: 1070 break; 1071 } 1072 } else if (strncmp(line, ".PATH", 5) == 0) { 1073 /* 1074 * .PATH<suffix> has to be handled specially. 1075 * Call on the suffix module to give us a path to 1076 * modify. 1077 */ 1078 Lst path; 1079 1080 specType = ExPath; 1081 path = Suff_GetPath(&line[5]); 1082 if (path == NULL) { 1083 Parse_Error(PARSE_FATAL, 1084 "Suffix '%s' not defined (yet)", 1085 &line[5]); 1086 goto out; 1087 } else { 1088 if (paths == (Lst)NULL) { 1089 paths = Lst_Init(FALSE); 1090 } 1091 (void)Lst_AtEnd(paths, path); 1092 } 1093 } 1094 } 1095 1096 /* 1097 * Have word in line. Get or create its node and stick it at 1098 * the end of the targets list 1099 */ 1100 if ((specType == Not) && (*line != '\0')) { 1101 if (Dir_HasWildcards(line)) { 1102 /* 1103 * Targets are to be sought only in the current directory, 1104 * so create an empty path for the thing. Note we need to 1105 * use Dir_Destroy in the destruction of the path as the 1106 * Dir module could have added a directory to the path... 1107 */ 1108 Lst emptyPath = Lst_Init(FALSE); 1109 1110 Dir_Expand(line, emptyPath, curTargs); 1111 1112 Lst_Destroy(emptyPath, Dir_Destroy); 1113 } else { 1114 /* 1115 * No wildcards, but we want to avoid code duplication, 1116 * so create a list with the word on it. 1117 */ 1118 (void)Lst_AtEnd(curTargs, line); 1119 } 1120 1121 while(!Lst_IsEmpty(curTargs)) { 1122 char *targName = (char *)Lst_DeQueue(curTargs); 1123 1124 if (!Suff_IsTransform (targName)) { 1125 gn = Targ_FindNode(targName, TARG_CREATE); 1126 } else { 1127 gn = Suff_AddTransform(targName); 1128 } 1129 1130 (void)Lst_AtEnd(targets, gn); 1131 } 1132 } else if (specType == ExPath && *line != '.' && *line != '\0') { 1133 Parse_Error(PARSE_WARNING, "Extra target (%s) ignored", line); 1134 } 1135 1136 *cp = savec; 1137 /* 1138 * If it is a special type and not .PATH, it's the only target we 1139 * allow on this line... 1140 */ 1141 if (specType != Not && specType != ExPath) { 1142 Boolean warning = FALSE; 1143 1144 while (*cp && (ParseIsEscaped(lstart, cp) || 1145 ((*cp != '!') && (*cp != ':')))) { 1146 if (ParseIsEscaped(lstart, cp) || 1147 (*cp != ' ' && *cp != '\t')) { 1148 warning = TRUE; 1149 } 1150 cp++; 1151 } 1152 if (warning) { 1153 Parse_Error(PARSE_WARNING, "Extra target ignored"); 1154 } 1155 } else { 1156 while (*cp && isspace ((unsigned char)*cp)) { 1157 cp++; 1158 } 1159 } 1160 line = cp; 1161 } while (*line && (ParseIsEscaped(lstart, line) || 1162 ((*line != '!') && (*line != ':')))); 1163 1164 /* 1165 * Don't need the list of target names anymore... 1166 */ 1167 Lst_Destroy(curTargs, NULL); 1168 curTargs = NULL; 1169 1170 if (!Lst_IsEmpty(targets)) { 1171 switch(specType) { 1172 default: 1173 Parse_Error(PARSE_WARNING, "Special and mundane targets don't mix. Mundane ones ignored"); 1174 break; 1175 case Default: 1176 case Begin: 1177 case End: 1178 case dotError: 1179 case Interrupt: 1180 /* 1181 * These four create nodes on which to hang commands, so 1182 * targets shouldn't be empty... 1183 */ 1184 case Not: 1185 /* 1186 * Nothing special here -- targets can be empty if it wants. 1187 */ 1188 break; 1189 } 1190 } 1191 1192 /* 1193 * Have now parsed all the target names. Must parse the operator next. The 1194 * result is left in op . 1195 */ 1196 if (*cp == '!') { 1197 op = OP_FORCE; 1198 } else if (*cp == ':') { 1199 if (cp[1] == ':') { 1200 op = OP_DOUBLEDEP; 1201 cp++; 1202 } else { 1203 op = OP_DEPENDS; 1204 } 1205 } else { 1206 Parse_Error(PARSE_FATAL, lstart[0] == '.' ? "Unknown directive" 1207 : "Missing dependency operator"); 1208 goto out; 1209 } 1210 1211 cp++; /* Advance beyond operator */ 1212 1213 Lst_ForEach(targets, ParseDoOp, &op); 1214 1215 /* 1216 * Get to the first source 1217 */ 1218 while (*cp && isspace ((unsigned char)*cp)) { 1219 cp++; 1220 } 1221 line = cp; 1222 1223 /* 1224 * Several special targets take different actions if present with no 1225 * sources: 1226 * a .SUFFIXES line with no sources clears out all old suffixes 1227 * a .PRECIOUS line makes all targets precious 1228 * a .IGNORE line ignores errors for all targets 1229 * a .SILENT line creates silence when making all targets 1230 * a .PATH removes all directories from the search path(s). 1231 */ 1232 if (!*line) { 1233 switch (specType) { 1234 case Suffixes: 1235 Suff_ClearSuffixes(); 1236 break; 1237 case Precious: 1238 allPrecious = TRUE; 1239 break; 1240 case Ignore: 1241 ignoreErrors = TRUE; 1242 break; 1243 case Silent: 1244 beSilent = TRUE; 1245 break; 1246 case ExPath: 1247 Lst_ForEach(paths, ParseClearPath, NULL); 1248 Dir_SetPATH(); 1249 break; 1250 #ifdef POSIX 1251 case Posix: 1252 Var_Set("%POSIX", "1003.2", VAR_GLOBAL, 0); 1253 break; 1254 #endif 1255 default: 1256 break; 1257 } 1258 } else if (specType == MFlags) { 1259 /* 1260 * Call on functions in main.c to deal with these arguments and 1261 * set the initial character to a null-character so the loop to 1262 * get sources won't get anything 1263 */ 1264 Main_ParseArgLine(line); 1265 *line = '\0'; 1266 } else if (specType == ExShell) { 1267 if (Job_ParseShell(line) != SUCCESS) { 1268 Parse_Error(PARSE_FATAL, "improper shell specification"); 1269 goto out; 1270 } 1271 *line = '\0'; 1272 } else if ((specType == NotParallel) || (specType == SingleShell)) { 1273 *line = '\0'; 1274 } 1275 1276 /* 1277 * NOW GO FOR THE SOURCES 1278 */ 1279 if ((specType == Suffixes) || (specType == ExPath) || 1280 (specType == Includes) || (specType == Libs) || 1281 (specType == Null) || (specType == ExObjdir)) 1282 { 1283 while (*line) { 1284 /* 1285 * If the target was one that doesn't take files as its sources 1286 * but takes something like suffixes, we take each 1287 * space-separated word on the line as a something and deal 1288 * with it accordingly. 1289 * 1290 * If the target was .SUFFIXES, we take each source as a 1291 * suffix and add it to the list of suffixes maintained by the 1292 * Suff module. 1293 * 1294 * If the target was a .PATH, we add the source as a directory 1295 * to search on the search path. 1296 * 1297 * If it was .INCLUDES, the source is taken to be the suffix of 1298 * files which will be #included and whose search path should 1299 * be present in the .INCLUDES variable. 1300 * 1301 * If it was .LIBS, the source is taken to be the suffix of 1302 * files which are considered libraries and whose search path 1303 * should be present in the .LIBS variable. 1304 * 1305 * If it was .NULL, the source is the suffix to use when a file 1306 * has no valid suffix. 1307 * 1308 * If it was .OBJDIR, the source is a new definition for .OBJDIR, 1309 * and will cause make to do a new chdir to that path. 1310 */ 1311 while (*cp && !isspace ((unsigned char)*cp)) { 1312 cp++; 1313 } 1314 savec = *cp; 1315 *cp = '\0'; 1316 switch (specType) { 1317 case Suffixes: 1318 Suff_AddSuffix(line, &mainNode); 1319 break; 1320 case ExPath: 1321 Lst_ForEach(paths, ParseAddDir, line); 1322 break; 1323 case Includes: 1324 Suff_AddInclude(line); 1325 break; 1326 case Libs: 1327 Suff_AddLib(line); 1328 break; 1329 case Null: 1330 Suff_SetNull(line); 1331 break; 1332 case ExObjdir: 1333 Main_SetObjdir(line); 1334 break; 1335 default: 1336 break; 1337 } 1338 *cp = savec; 1339 if (savec != '\0') { 1340 cp++; 1341 } 1342 while (*cp && isspace ((unsigned char)*cp)) { 1343 cp++; 1344 } 1345 line = cp; 1346 } 1347 if (paths) { 1348 Lst_Destroy(paths, NULL); 1349 } 1350 if (specType == ExPath) 1351 Dir_SetPATH(); 1352 } else { 1353 while (*line) { 1354 /* 1355 * The targets take real sources, so we must beware of archive 1356 * specifications (i.e. things with left parentheses in them) 1357 * and handle them accordingly. 1358 */ 1359 for (; *cp && !isspace ((unsigned char)*cp); cp++) { 1360 if ((*cp == LPAREN) && (cp > line) && (cp[-1] != '$')) { 1361 /* 1362 * Only stop for a left parenthesis if it isn't at the 1363 * start of a word (that'll be for variable changes 1364 * later) and isn't preceded by a dollar sign (a dynamic 1365 * source). 1366 */ 1367 break; 1368 } 1369 } 1370 1371 if (*cp == LPAREN) { 1372 sources = Lst_Init(FALSE); 1373 if (Arch_ParseArchive(&line, sources, VAR_CMD) != SUCCESS) { 1374 Parse_Error(PARSE_FATAL, 1375 "Error in source archive spec \"%s\"", line); 1376 goto out; 1377 } 1378 1379 while (!Lst_IsEmpty (sources)) { 1380 gn = (GNode *)Lst_DeQueue(sources); 1381 ParseDoSrc(tOp, gn->name); 1382 } 1383 Lst_Destroy(sources, NULL); 1384 cp = line; 1385 } else { 1386 if (*cp) { 1387 *cp = '\0'; 1388 cp += 1; 1389 } 1390 1391 ParseDoSrc(tOp, line); 1392 } 1393 while (*cp && isspace ((unsigned char)*cp)) { 1394 cp++; 1395 } 1396 line = cp; 1397 } 1398 } 1399 1400 if (mainNode == NULL) { 1401 /* 1402 * If we have yet to decide on a main target to make, in the 1403 * absence of any user input, we want the first target on 1404 * the first dependency line that is actually a real target 1405 * (i.e. isn't a .USE or .EXEC rule) to be made. 1406 */ 1407 Lst_ForEach(targets, ParseFindMain, NULL); 1408 } 1409 1410 out: 1411 if (curTargs) 1412 Lst_Destroy(curTargs, NULL); 1413 } 1414 1415 /*- 1416 *--------------------------------------------------------------------- 1417 * Parse_IsVar -- 1418 * Return TRUE if the passed line is a variable assignment. A variable 1419 * assignment consists of a single word followed by optional whitespace 1420 * followed by either a += or an = operator. 1421 * This function is used both by the Parse_File function and main when 1422 * parsing the command-line arguments. 1423 * 1424 * Input: 1425 * line the line to check 1426 * 1427 * Results: 1428 * TRUE if it is. FALSE if it ain't 1429 * 1430 * Side Effects: 1431 * none 1432 *--------------------------------------------------------------------- 1433 */ 1434 Boolean 1435 Parse_IsVar(char *line) 1436 { 1437 Boolean wasSpace = FALSE; /* set TRUE if found a space */ 1438 char ch; 1439 int level = 0; 1440 #define ISEQOPERATOR(c) \ 1441 (((c) == '+') || ((c) == ':') || ((c) == '?') || ((c) == '!')) 1442 1443 /* 1444 * Skip to variable name 1445 */ 1446 for (;(*line == ' ') || (*line == '\t'); line++) 1447 continue; 1448 1449 /* Scan for one of the assignment operators outside a variable expansion */ 1450 while ((ch = *line++) != 0) { 1451 if (ch == '(' || ch == '{') { 1452 level++; 1453 continue; 1454 } 1455 if (ch == ')' || ch == '}') { 1456 level--; 1457 continue; 1458 } 1459 if (level != 0) 1460 continue; 1461 while (ch == ' ' || ch == '\t') { 1462 ch = *line++; 1463 wasSpace = TRUE; 1464 } 1465 if (ch == '=') 1466 return TRUE; 1467 if (*line == '=' && ISEQOPERATOR(ch)) 1468 return TRUE; 1469 if (wasSpace) 1470 return FALSE; 1471 } 1472 1473 return FALSE; 1474 } 1475 1476 /*- 1477 *--------------------------------------------------------------------- 1478 * Parse_DoVar -- 1479 * Take the variable assignment in the passed line and do it in the 1480 * global context. 1481 * 1482 * Note: There is a lexical ambiguity with assignment modifier characters 1483 * in variable names. This routine interprets the character before the = 1484 * as a modifier. Therefore, an assignment like 1485 * C++=/usr/bin/CC 1486 * is interpreted as "C+ +=" instead of "C++ =". 1487 * 1488 * Input: 1489 * line a line guaranteed to be a variable assignment. 1490 * This reduces error checks 1491 * ctxt Context in which to do the assignment 1492 * 1493 * Results: 1494 * none 1495 * 1496 * Side Effects: 1497 * the variable structure of the given variable name is altered in the 1498 * global context. 1499 *--------------------------------------------------------------------- 1500 */ 1501 void 1502 Parse_DoVar(char *line, GNode *ctxt) 1503 { 1504 char *cp; /* pointer into line */ 1505 enum { 1506 VAR_SUBST, VAR_APPEND, VAR_SHELL, VAR_NORMAL 1507 } type; /* Type of assignment */ 1508 char *opc; /* ptr to operator character to 1509 * null-terminate the variable name */ 1510 Boolean freeCp = FALSE; /* TRUE if cp needs to be freed, 1511 * i.e. if any variable expansion was 1512 * performed */ 1513 int depth; 1514 1515 /* 1516 * Skip to variable name 1517 */ 1518 while ((*line == ' ') || (*line == '\t')) { 1519 line++; 1520 } 1521 1522 /* 1523 * Skip to operator character, nulling out whitespace as we go 1524 * XXX Rather than counting () and {} we should look for $ and 1525 * then expand the variable. 1526 */ 1527 for (depth = 0, cp = line + 1; depth != 0 || *cp != '='; cp++) { 1528 if (*cp == '(' || *cp == '{') { 1529 depth++; 1530 continue; 1531 } 1532 if (*cp == ')' || *cp == '}') { 1533 depth--; 1534 continue; 1535 } 1536 if (depth == 0 && isspace ((unsigned char)*cp)) { 1537 *cp = '\0'; 1538 } 1539 } 1540 opc = cp-1; /* operator is the previous character */ 1541 *cp++ = '\0'; /* nuke the = */ 1542 1543 /* 1544 * Check operator type 1545 */ 1546 switch (*opc) { 1547 case '+': 1548 type = VAR_APPEND; 1549 *opc = '\0'; 1550 break; 1551 1552 case '?': 1553 /* 1554 * If the variable already has a value, we don't do anything. 1555 */ 1556 *opc = '\0'; 1557 if (Var_Exists(line, ctxt)) { 1558 return; 1559 } else { 1560 type = VAR_NORMAL; 1561 } 1562 break; 1563 1564 case ':': 1565 type = VAR_SUBST; 1566 *opc = '\0'; 1567 break; 1568 1569 case '!': 1570 type = VAR_SHELL; 1571 *opc = '\0'; 1572 break; 1573 1574 default: 1575 #ifdef SUNSHCMD 1576 while (opc > line && *opc != ':') 1577 opc--; 1578 1579 if (strncmp(opc, ":sh", 3) == 0) { 1580 type = VAR_SHELL; 1581 *opc = '\0'; 1582 break; 1583 } 1584 #endif 1585 type = VAR_NORMAL; 1586 break; 1587 } 1588 1589 while (isspace ((unsigned char)*cp)) { 1590 cp++; 1591 } 1592 1593 if (type == VAR_APPEND) { 1594 Var_Append(line, cp, ctxt); 1595 } else if (type == VAR_SUBST) { 1596 /* 1597 * Allow variables in the old value to be undefined, but leave their 1598 * invocation alone -- this is done by forcing oldVars to be false. 1599 * XXX: This can cause recursive variables, but that's not hard to do, 1600 * and this allows someone to do something like 1601 * 1602 * CFLAGS = $(.INCLUDES) 1603 * CFLAGS := -I.. $(CFLAGS) 1604 * 1605 * And not get an error. 1606 */ 1607 Boolean oldOldVars = oldVars; 1608 1609 oldVars = FALSE; 1610 1611 /* 1612 * make sure that we set the variable the first time to nothing 1613 * so that it gets substituted! 1614 */ 1615 if (!Var_Exists(line, ctxt)) 1616 Var_Set(line, "", ctxt, 0); 1617 1618 cp = Var_Subst(NULL, cp, ctxt, FALSE); 1619 oldVars = oldOldVars; 1620 freeCp = TRUE; 1621 1622 Var_Set(line, cp, ctxt, 0); 1623 } else if (type == VAR_SHELL) { 1624 char *res; 1625 const char *error; 1626 1627 if (strchr(cp, '$') != NULL) { 1628 /* 1629 * There's a dollar sign in the command, so perform variable 1630 * expansion on the whole thing. The resulting string will need 1631 * freeing when we're done, so set freeCmd to TRUE. 1632 */ 1633 cp = Var_Subst(NULL, cp, VAR_CMD, TRUE); 1634 freeCp = TRUE; 1635 } 1636 1637 res = Cmd_Exec(cp, &error); 1638 Var_Set(line, res, ctxt, 0); 1639 free(res); 1640 1641 if (error) 1642 Parse_Error(PARSE_WARNING, error, cp); 1643 } else { 1644 /* 1645 * Normal assignment -- just do it. 1646 */ 1647 Var_Set(line, cp, ctxt, 0); 1648 } 1649 if (strcmp(line, MAKEOVERRIDES) == 0) 1650 Main_ExportMAKEFLAGS(FALSE); /* re-export MAKEFLAGS */ 1651 else if (strcmp(line, ".CURDIR") == 0) { 1652 /* 1653 * Somone is being (too?) clever... 1654 * Let's pretend they know what they are doing and 1655 * re-initialize the 'cur' Path. 1656 */ 1657 Dir_InitCur(cp); 1658 Dir_SetPATH(); 1659 } else if (strcmp(line, MAKE_JOB_PREFIX) == 0) { 1660 Job_SetPrefix(); 1661 } else if (strcmp(line, MAKE_EXPORTED) == 0) { 1662 Var_Export(cp, 0); 1663 } 1664 if (freeCp) 1665 free(cp); 1666 } 1667 1668 1669 /*- 1670 * ParseAddCmd -- 1671 * Lst_ForEach function to add a command line to all targets 1672 * 1673 * Input: 1674 * gnp the node to which the command is to be added 1675 * cmd the command to add 1676 * 1677 * Results: 1678 * Always 0 1679 * 1680 * Side Effects: 1681 * A new element is added to the commands list of the node. 1682 */ 1683 static int 1684 ParseAddCmd(void *gnp, void *cmd) 1685 { 1686 GNode *gn = (GNode *)gnp; 1687 1688 /* Add to last (ie current) cohort for :: targets */ 1689 if ((gn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (gn->cohorts)) 1690 gn = (GNode *)Lst_Datum(Lst_Last(gn->cohorts)); 1691 1692 /* if target already supplied, ignore commands */ 1693 if (!(gn->type & OP_HAS_COMMANDS)) { 1694 (void)Lst_AtEnd(gn->commands, cmd); 1695 ParseMark(gn); 1696 } else { 1697 #ifdef notyet 1698 /* XXX: We cannot do this until we fix the tree */ 1699 (void)Lst_AtEnd(gn->commands, cmd); 1700 Parse_Error(PARSE_WARNING, 1701 "overriding commands for target \"%s\"; " 1702 "previous commands defined at %s: %d ignored", 1703 gn->name, gn->fname, gn->lineno); 1704 #else 1705 Parse_Error(PARSE_WARNING, 1706 "duplicate script for target \"%s\" ignored", 1707 gn->name); 1708 ParseErrorInternal(gn->fname, gn->lineno, PARSE_WARNING, 1709 "using previous script for \"%s\" defined here", 1710 gn->name); 1711 #endif 1712 } 1713 return(0); 1714 } 1715 1716 /*- 1717 *----------------------------------------------------------------------- 1718 * ParseHasCommands -- 1719 * Callback procedure for Parse_File when destroying the list of 1720 * targets on the last dependency line. Marks a target as already 1721 * having commands if it does, to keep from having shell commands 1722 * on multiple dependency lines. 1723 * 1724 * Input: 1725 * gnp Node to examine 1726 * 1727 * Results: 1728 * None 1729 * 1730 * Side Effects: 1731 * OP_HAS_COMMANDS may be set for the target. 1732 * 1733 *----------------------------------------------------------------------- 1734 */ 1735 static void 1736 ParseHasCommands(void *gnp) 1737 { 1738 GNode *gn = (GNode *)gnp; 1739 if (!Lst_IsEmpty(gn->commands)) { 1740 gn->type |= OP_HAS_COMMANDS; 1741 } 1742 } 1743 1744 /*- 1745 *----------------------------------------------------------------------- 1746 * Parse_AddIncludeDir -- 1747 * Add a directory to the path searched for included makefiles 1748 * bracketed by double-quotes. Used by functions in main.c 1749 * 1750 * Input: 1751 * dir The name of the directory to add 1752 * 1753 * Results: 1754 * None. 1755 * 1756 * Side Effects: 1757 * The directory is appended to the list. 1758 * 1759 *----------------------------------------------------------------------- 1760 */ 1761 void 1762 Parse_AddIncludeDir(char *dir) 1763 { 1764 (void)Dir_AddDir(parseIncPath, dir); 1765 } 1766 1767 /*- 1768 *--------------------------------------------------------------------- 1769 * ParseDoInclude -- 1770 * Push to another file. 1771 * 1772 * The input is the line minus the `.'. A file spec is a string 1773 * enclosed in <> or "". The former is looked for only in sysIncPath. 1774 * The latter in . and the directories specified by -I command line 1775 * options 1776 * 1777 * Results: 1778 * None 1779 * 1780 * Side Effects: 1781 * A structure is added to the includes Lst and readProc, lineno, 1782 * fname and curFILE are altered for the new file 1783 *--------------------------------------------------------------------- 1784 */ 1785 1786 static void 1787 Parse_include_file(char *file, Boolean isSystem, int silent) 1788 { 1789 char *fullname; /* full pathname of file */ 1790 char *newName; 1791 char *prefEnd, *incdir; 1792 int fd; 1793 int i; 1794 1795 /* 1796 * Now we know the file's name and its search path, we attempt to 1797 * find the durn thing. A return of NULL indicates the file don't 1798 * exist. 1799 */ 1800 fullname = file[0] == '/' ? bmake_strdup(file) : NULL; 1801 1802 if (fullname == NULL && !isSystem) { 1803 /* 1804 * Include files contained in double-quotes are first searched for 1805 * relative to the including file's location. We don't want to 1806 * cd there, of course, so we just tack on the old file's 1807 * leading path components and call Dir_FindFile to see if 1808 * we can locate the beast. 1809 */ 1810 1811 incdir = bmake_strdup(curFile->fname); 1812 prefEnd = strrchr(incdir, '/'); 1813 if (prefEnd != NULL) { 1814 *prefEnd = '\0'; 1815 /* Now do lexical processing of leading "../" on the filename */ 1816 for (i = 0; strncmp(file + i, "../", 3) == 0; i += 3) { 1817 prefEnd = strrchr(incdir + 1, '/'); 1818 if (prefEnd == NULL || strcmp(prefEnd, "/..") == 0) 1819 break; 1820 *prefEnd = '\0'; 1821 } 1822 newName = str_concat(incdir, file + i, STR_ADDSLASH); 1823 fullname = Dir_FindFile(newName, parseIncPath); 1824 if (fullname == NULL) 1825 fullname = Dir_FindFile(newName, dirSearchPath); 1826 free(newName); 1827 } 1828 free(incdir); 1829 1830 if (fullname == NULL) { 1831 /* 1832 * Makefile wasn't found in same directory as included makefile. 1833 * Search for it first on the -I search path, 1834 * then on the .PATH search path, if not found in a -I directory. 1835 * If we have a suffix specific path we should use that. 1836 */ 1837 char *suff; 1838 Lst suffPath = NULL; 1839 1840 if ((suff = strrchr(file, '.'))) { 1841 suffPath = Suff_GetPath(suff); 1842 if (suffPath != NULL) { 1843 fullname = Dir_FindFile(file, suffPath); 1844 } 1845 } 1846 if (fullname == NULL) { 1847 fullname = Dir_FindFile(file, parseIncPath); 1848 if (fullname == NULL) { 1849 fullname = Dir_FindFile(file, dirSearchPath); 1850 } 1851 } 1852 } 1853 } 1854 1855 /* Looking for a system file or file still not found */ 1856 if (fullname == NULL) { 1857 /* 1858 * Look for it on the system path 1859 */ 1860 fullname = Dir_FindFile(file, 1861 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath); 1862 } 1863 1864 if (fullname == NULL) { 1865 if (!silent) 1866 Parse_Error(PARSE_FATAL, "Could not find %s", file); 1867 return; 1868 } 1869 1870 /* Actually open the file... */ 1871 fd = open(fullname, O_RDONLY); 1872 if (fd == -1) { 1873 if (!silent) 1874 Parse_Error(PARSE_FATAL, "Cannot open %s", fullname); 1875 free(fullname); 1876 return; 1877 } 1878 1879 /* Start reading from this file next */ 1880 Parse_SetInput(fullname, 0, fd, NULL, NULL); 1881 } 1882 1883 static void 1884 ParseDoInclude(char *line) 1885 { 1886 char endc; /* the character which ends the file spec */ 1887 char *cp; /* current position in file spec */ 1888 int silent = (*line != 'i') ? 1 : 0; 1889 char *file = &line[7 + silent]; 1890 1891 /* Skip to delimiter character so we know where to look */ 1892 while (*file == ' ' || *file == '\t') 1893 file++; 1894 1895 if (*file != '"' && *file != '<') { 1896 Parse_Error(PARSE_FATAL, 1897 ".include filename must be delimited by '\"' or '<'"); 1898 return; 1899 } 1900 1901 /* 1902 * Set the search path on which to find the include file based on the 1903 * characters which bracket its name. Angle-brackets imply it's 1904 * a system Makefile while double-quotes imply it's a user makefile 1905 */ 1906 if (*file == '<') { 1907 endc = '>'; 1908 } else { 1909 endc = '"'; 1910 } 1911 1912 /* Skip to matching delimiter */ 1913 for (cp = ++file; *cp && *cp != endc; cp++) 1914 continue; 1915 1916 if (*cp != endc) { 1917 Parse_Error(PARSE_FATAL, 1918 "Unclosed %cinclude filename. '%c' expected", 1919 '.', endc); 1920 return; 1921 } 1922 *cp = '\0'; 1923 1924 /* 1925 * Substitute for any variables in the file name before trying to 1926 * find the thing. 1927 */ 1928 file = Var_Subst(NULL, file, VAR_CMD, FALSE); 1929 1930 Parse_include_file(file, endc == '>', silent); 1931 free(file); 1932 } 1933 1934 1935 /*- 1936 *--------------------------------------------------------------------- 1937 * ParseSetParseFile -- 1938 * Set the .PARSEDIR and .PARSEFILE variables to the dirname and 1939 * basename of the given filename 1940 * 1941 * Results: 1942 * None 1943 * 1944 * Side Effects: 1945 * The .PARSEDIR and .PARSEFILE variables are overwritten by the 1946 * dirname and basename of the given filename. 1947 *--------------------------------------------------------------------- 1948 */ 1949 static void 1950 ParseSetParseFile(const char *filename) 1951 { 1952 char *slash; 1953 char *dirname; 1954 int len; 1955 1956 slash = strrchr(filename, '/'); 1957 if (slash == NULL) { 1958 Var_Set(".PARSEDIR", ".", VAR_GLOBAL, 0); 1959 Var_Set(".PARSEFILE", filename, VAR_GLOBAL, 0); 1960 } else { 1961 len = slash - filename; 1962 dirname = bmake_malloc(len + 1); 1963 memcpy(dirname, filename, len); 1964 dirname[len] = 0; 1965 Var_Set(".PARSEDIR", dirname, VAR_GLOBAL, 0); 1966 Var_Set(".PARSEFILE", slash+1, VAR_GLOBAL, 0); 1967 free(dirname); 1968 } 1969 } 1970 1971 /* 1972 * Track the makefiles we read - so makefiles can 1973 * set dependencies on them. 1974 * Avoid adding anything more than once. 1975 */ 1976 1977 static void 1978 ParseTrackInput(const char *name) 1979 { 1980 char *old; 1981 char *fp = NULL; 1982 size_t name_len = strlen(name); 1983 1984 old = Var_Value(MAKE_MAKEFILES, VAR_GLOBAL, &fp); 1985 if (old) { 1986 /* does it contain name? */ 1987 for (; old != NULL; old = strchr(old, ' ')) { 1988 if (*old == ' ') 1989 old++; 1990 if (memcmp(old, name, name_len) == 0 1991 && (old[name_len] == 0 || old[name_len] == ' ')) 1992 goto cleanup; 1993 } 1994 } 1995 Var_Append (MAKE_MAKEFILES, name, VAR_GLOBAL); 1996 cleanup: 1997 if (fp) { 1998 free(fp); 1999 } 2000 } 2001 2002 2003 /*- 2004 *--------------------------------------------------------------------- 2005 * Parse_setInput -- 2006 * Start Parsing from the given source 2007 * 2008 * Results: 2009 * None 2010 * 2011 * Side Effects: 2012 * A structure is added to the includes Lst and readProc, lineno, 2013 * fname and curFile are altered for the new file 2014 *--------------------------------------------------------------------- 2015 */ 2016 void 2017 Parse_SetInput(const char *name, int line, int fd, char *(*nextbuf)(void *), void *arg) 2018 { 2019 char *buf; 2020 2021 if (name == NULL) 2022 name = curFile->fname; 2023 else 2024 ParseTrackInput(name); 2025 2026 if (DEBUG(PARSE)) 2027 fprintf(debug_file, "Parse_SetInput: file %s, line %d, fd %d, nextbuf %p, arg %p\n", 2028 name, line, fd, nextbuf, arg); 2029 2030 if (fd == -1 && nextbuf == NULL) 2031 /* sanity */ 2032 return; 2033 2034 if (curFile != NULL) 2035 /* Save exiting file info */ 2036 Lst_AtFront(includes, curFile); 2037 2038 /* Allocate and fill in new structure */ 2039 curFile = bmake_malloc(sizeof *curFile); 2040 2041 /* 2042 * Once the previous state has been saved, we can get down to reading 2043 * the new file. We set up the name of the file to be the absolute 2044 * name of the include file so error messages refer to the right 2045 * place. 2046 */ 2047 curFile->fname = name; 2048 curFile->lineno = line; 2049 curFile->first_lineno = line; 2050 curFile->fd = fd; 2051 curFile->nextbuf = nextbuf; 2052 curFile->nextbuf_arg = arg; 2053 2054 if (nextbuf == NULL) { 2055 /* 2056 * Allocate a 32k data buffer (as stdio seems to). 2057 * Set pointers so that first ParseReadc has to do a file read. 2058 */ 2059 buf = bmake_malloc(IFILE_BUFLEN); 2060 buf[0] = 0; 2061 curFile->P_str = buf; 2062 curFile->P_ptr = buf; 2063 curFile->P_end = buf; 2064 curFile->P_buflen = IFILE_BUFLEN; 2065 } else { 2066 /* Get first block of input data */ 2067 buf = curFile->nextbuf(curFile->nextbuf_arg); 2068 if (buf == NULL) { 2069 /* Was all a waste of time ... */ 2070 free(curFile); 2071 return; 2072 } 2073 curFile->P_str = buf; 2074 curFile->P_ptr = buf; 2075 curFile->P_end = NULL; 2076 } 2077 2078 curFile->cond_depth = Cond_save_depth(); 2079 ParseSetParseFile(name); 2080 } 2081 2082 #ifdef SYSVINCLUDE 2083 /*- 2084 *--------------------------------------------------------------------- 2085 * ParseTraditionalInclude -- 2086 * Push to another file. 2087 * 2088 * The input is the current line. The file name(s) are 2089 * following the "include". 2090 * 2091 * Results: 2092 * None 2093 * 2094 * Side Effects: 2095 * A structure is added to the includes Lst and readProc, lineno, 2096 * fname and curFILE are altered for the new file 2097 *--------------------------------------------------------------------- 2098 */ 2099 static void 2100 ParseTraditionalInclude(char *line) 2101 { 2102 char *cp; /* current position in file spec */ 2103 int done = 0; 2104 int silent = (line[0] != 'i') ? 1 : 0; 2105 char *file = &line[silent + 7]; 2106 char *all_files; 2107 2108 if (DEBUG(PARSE)) { 2109 fprintf(debug_file, "ParseTraditionalInclude: %s\n", file); 2110 } 2111 2112 /* 2113 * Skip over whitespace 2114 */ 2115 while (isspace((unsigned char)*file)) 2116 file++; 2117 2118 /* 2119 * Substitute for any variables in the file name before trying to 2120 * find the thing. 2121 */ 2122 all_files = Var_Subst(NULL, file, VAR_CMD, FALSE); 2123 2124 if (*file == '\0') { 2125 Parse_Error(PARSE_FATAL, 2126 "Filename missing from \"include\""); 2127 return; 2128 } 2129 2130 for (file = all_files; !done; file = cp + 1) { 2131 /* Skip to end of line or next whitespace */ 2132 for (cp = file; *cp && !isspace((unsigned char) *cp); cp++) 2133 continue; 2134 2135 if (*cp) 2136 *cp = '\0'; 2137 else 2138 done = 1; 2139 2140 Parse_include_file(file, FALSE, silent); 2141 } 2142 free(all_files); 2143 } 2144 #endif 2145 2146 /*- 2147 *--------------------------------------------------------------------- 2148 * ParseEOF -- 2149 * Called when EOF is reached in the current file. If we were reading 2150 * an include file, the includes stack is popped and things set up 2151 * to go back to reading the previous file at the previous location. 2152 * 2153 * Results: 2154 * CONTINUE if there's more to do. DONE if not. 2155 * 2156 * Side Effects: 2157 * The old curFILE, is closed. The includes list is shortened. 2158 * lineno, curFILE, and fname are changed if CONTINUE is returned. 2159 *--------------------------------------------------------------------- 2160 */ 2161 static int 2162 ParseEOF(void) 2163 { 2164 char *ptr; 2165 2166 if (curFile->nextbuf != NULL) { 2167 /* eg .for loop data, get next iteration */ 2168 ptr = curFile->nextbuf(curFile->nextbuf_arg); 2169 curFile->P_ptr = ptr; 2170 curFile->P_str = ptr; 2171 curFile->lineno = curFile->first_lineno; 2172 if (ptr != NULL) { 2173 /* Iterate again */ 2174 return CONTINUE; 2175 } 2176 } 2177 2178 /* Ensure the makefile (or loop) didn't have mismatched conditionals */ 2179 Cond_restore_depth(curFile->cond_depth); 2180 2181 /* Dispose of curFile info */ 2182 /* Leak curFile->fname because all the gnodes have pointers to it */ 2183 if (curFile->fd != -1) 2184 close(curFile->fd); 2185 free(curFile->P_str); 2186 free(curFile); 2187 2188 curFile = Lst_DeQueue(includes); 2189 2190 if (curFile == NULL) { 2191 /* We've run out of input */ 2192 Var_Delete(".PARSEDIR", VAR_GLOBAL); 2193 Var_Delete(".PARSEFILE", VAR_GLOBAL); 2194 return DONE; 2195 } 2196 2197 if (DEBUG(PARSE)) 2198 fprintf(debug_file, "ParseEOF: returning to file %s, line %d, fd %d\n", 2199 curFile->fname, curFile->lineno, curFile->fd); 2200 2201 /* Restore the PARSEDIR/PARSEFILE variables */ 2202 ParseSetParseFile(curFile->fname); 2203 return (CONTINUE); 2204 } 2205 2206 #define PARSE_RAW 1 2207 #define PARSE_SKIP 2 2208 2209 static char * 2210 ParseGetLine(int flags, int *length) 2211 { 2212 IFile *cf = curFile; 2213 char *ptr; 2214 char ch; 2215 char *line; 2216 char *line_end; 2217 char *escaped; 2218 char *comment; 2219 char *tp; 2220 int len, dist; 2221 2222 /* Loop through blank lines and comment lines */ 2223 for (;;) { 2224 cf->lineno++; 2225 line = cf->P_ptr; 2226 ptr = line; 2227 line_end = line; 2228 escaped = NULL; 2229 comment = NULL; 2230 for (;;) { 2231 ch = *ptr; 2232 if (ch == 0 || (ch == '\\' && ptr[1] == 0)) { 2233 if (cf->P_end == NULL) 2234 /* End of string (aka for loop) data */ 2235 break; 2236 /* End of data read from file, read more data */ 2237 if (ptr != cf->P_end && (ch != '\\' || ptr + 1 != cf->P_end)) { 2238 Parse_Error(PARSE_FATAL, "Zero byte read from file"); 2239 return NULL; 2240 } 2241 /* Move existing data to (near) start of file buffer */ 2242 len = cf->P_end - cf->P_ptr; 2243 tp = cf->P_str + 32; 2244 memmove(tp, cf->P_ptr, len); 2245 dist = cf->P_ptr - tp; 2246 /* Update all pointers to reflect moved data */ 2247 ptr -= dist; 2248 line -= dist; 2249 line_end -= dist; 2250 if (escaped) 2251 escaped -= dist; 2252 if (comment) 2253 comment -= dist; 2254 cf->P_ptr = tp; 2255 tp += len; 2256 cf->P_end = tp; 2257 /* Try to read more data from file into buffer space */ 2258 len = cf->P_str + cf->P_buflen - tp - 32; 2259 if (len <= 0) { 2260 /* We need a bigger buffer to hold this line */ 2261 tp = bmake_realloc(cf->P_str, cf->P_buflen + IFILE_BUFLEN); 2262 cf->P_ptr = cf->P_ptr - cf->P_str + tp; 2263 cf->P_end = cf->P_end - cf->P_str + tp; 2264 ptr = ptr - cf->P_str + tp; 2265 line = line - cf->P_str + tp; 2266 line_end = line_end - cf->P_str + tp; 2267 if (escaped) 2268 escaped = escaped - cf->P_str + tp; 2269 if (comment) 2270 comment = comment - cf->P_str + tp; 2271 cf->P_str = tp; 2272 tp = cf->P_end; 2273 len += IFILE_BUFLEN; 2274 cf->P_buflen += IFILE_BUFLEN; 2275 } 2276 len = read(cf->fd, tp, len); 2277 if (len <= 0) { 2278 if (len < 0) { 2279 Parse_Error(PARSE_FATAL, "Makefile read error: %s", 2280 strerror(errno)); 2281 return NULL; 2282 } 2283 /* End of file */ 2284 break; 2285 } 2286 /* 0 terminate the data, and update end pointer */ 2287 tp += len; 2288 cf->P_end = tp; 2289 *tp = 0; 2290 /* Process newly read characters */ 2291 continue; 2292 } 2293 2294 if (ch == '\\') { 2295 /* Don't treat next character as special, remember first one */ 2296 if (escaped == NULL) 2297 escaped = ptr; 2298 if (ptr[1] == '\n') 2299 cf->lineno++; 2300 ptr += 2; 2301 line_end = ptr; 2302 continue; 2303 } 2304 if (ch == '#' && comment == NULL) { 2305 /* Remember first '#' for comment stripping */ 2306 comment = line_end; 2307 } 2308 ptr++; 2309 if (ch == '\n') 2310 break; 2311 if (!isspace((unsigned char)ch)) 2312 /* We are not interested in trailing whitespace */ 2313 line_end = ptr; 2314 } 2315 2316 /* Save next 'to be processed' location */ 2317 cf->P_ptr = ptr; 2318 2319 /* Check we have a non-comment, non-blank line */ 2320 if (line_end == line || comment == line) { 2321 if (ch == 0) 2322 /* At end of file */ 2323 return NULL; 2324 /* Parse another line */ 2325 continue; 2326 } 2327 2328 /* We now have a line of data */ 2329 *line_end = 0; 2330 2331 if (flags & PARSE_RAW) { 2332 /* Leave '\' (etc) in line buffer (eg 'for' lines) */ 2333 *length = line_end - line; 2334 return line; 2335 } 2336 2337 if (flags & PARSE_SKIP) { 2338 /* Completely ignore non-directives */ 2339 if (line[0] != '.') 2340 continue; 2341 /* We could do more of the .else/.elif/.endif checks here */ 2342 } 2343 break; 2344 } 2345 2346 /* Brutally ignore anything after a non-escaped '#' in non-commands */ 2347 if (comment != NULL && line[0] != '\t') { 2348 line_end = comment; 2349 *line_end = 0; 2350 } 2351 2352 /* If we didn't see a '\\' then the in-situ data is fine */ 2353 if (escaped == NULL) { 2354 *length = line_end - line; 2355 return line; 2356 } 2357 2358 /* Remove escapes from '\n' and '#' */ 2359 tp = ptr = escaped; 2360 escaped = line; 2361 for (; ; *tp++ = ch) { 2362 ch = *ptr++; 2363 if (ch != '\\') { 2364 if (ch == 0) 2365 break; 2366 continue; 2367 } 2368 2369 ch = *ptr++; 2370 if (ch == 0) { 2371 /* Delete '\\' at end of buffer */ 2372 tp--; 2373 break; 2374 } 2375 2376 if (ch == '#' && line[0] != '\t') 2377 /* Delete '\\' from before '#' on non-command lines */ 2378 continue; 2379 2380 if (ch != '\n') { 2381 /* Leave '\\' in buffer for later */ 2382 *tp++ = '\\'; 2383 /* Make sure we don't delete an escaped ' ' from the line end */ 2384 escaped = tp + 1; 2385 continue; 2386 } 2387 2388 /* Escaped '\n' replace following whitespace with a single ' ' */ 2389 while (ptr[0] == ' ' || ptr[0] == '\t') 2390 ptr++; 2391 ch = ' '; 2392 } 2393 2394 /* Delete any trailing spaces - eg from empty continuations */ 2395 while (tp > escaped && isspace((unsigned char)tp[-1])) 2396 tp--; 2397 2398 *tp = 0; 2399 *length = tp - line; 2400 return line; 2401 } 2402 2403 /*- 2404 *--------------------------------------------------------------------- 2405 * ParseReadLine -- 2406 * Read an entire line from the input file. Called only by Parse_File. 2407 * 2408 * Results: 2409 * A line w/o its newline 2410 * 2411 * Side Effects: 2412 * Only those associated with reading a character 2413 *--------------------------------------------------------------------- 2414 */ 2415 static char * 2416 ParseReadLine(void) 2417 { 2418 char *line; /* Result */ 2419 int lineLength; /* Length of result */ 2420 int lineno; /* Saved line # */ 2421 int rval; 2422 2423 for (;;) { 2424 line = ParseGetLine(0, &lineLength); 2425 if (line == NULL) 2426 return NULL; 2427 2428 if (line[0] != '.') 2429 return line; 2430 2431 /* 2432 * The line might be a conditional. Ask the conditional module 2433 * about it and act accordingly 2434 */ 2435 switch (Cond_Eval(line)) { 2436 case COND_SKIP: 2437 /* Skip to next conditional that evaluates to COND_PARSE. */ 2438 do { 2439 line = ParseGetLine(PARSE_SKIP, &lineLength); 2440 } while (line && Cond_Eval(line) != COND_PARSE); 2441 if (line == NULL) 2442 break; 2443 continue; 2444 case COND_PARSE: 2445 continue; 2446 case COND_INVALID: /* Not a conditional line */ 2447 /* Check for .for loops */ 2448 rval = For_Eval(line); 2449 if (rval == 0) 2450 /* Not a .for line */ 2451 break; 2452 if (rval < 0) 2453 /* Syntax error - error printed, ignore line */ 2454 continue; 2455 /* Start of a .for loop */ 2456 lineno = curFile->lineno; 2457 /* Accumulate loop lines until matching .endfor */ 2458 do { 2459 line = ParseGetLine(PARSE_RAW, &lineLength); 2460 if (line == NULL) { 2461 Parse_Error(PARSE_FATAL, 2462 "Unexpected end of file in for loop.\n"); 2463 break; 2464 } 2465 } while (For_Accum(line)); 2466 /* Stash each iteration as a new 'input file' */ 2467 For_Run(lineno); 2468 /* Read next line from for-loop buffer */ 2469 continue; 2470 } 2471 return (line); 2472 } 2473 } 2474 2475 /*- 2476 *----------------------------------------------------------------------- 2477 * ParseFinishLine -- 2478 * Handle the end of a dependency group. 2479 * 2480 * Results: 2481 * Nothing. 2482 * 2483 * Side Effects: 2484 * inLine set FALSE. 'targets' list destroyed. 2485 * 2486 *----------------------------------------------------------------------- 2487 */ 2488 static void 2489 ParseFinishLine(void) 2490 { 2491 if (inLine) { 2492 Lst_ForEach(targets, Suff_EndTransform, NULL); 2493 Lst_Destroy(targets, ParseHasCommands); 2494 targets = NULL; 2495 inLine = FALSE; 2496 } 2497 } 2498 2499 2500 /*- 2501 *--------------------------------------------------------------------- 2502 * Parse_File -- 2503 * Parse a file into its component parts, incorporating it into the 2504 * current dependency graph. This is the main function and controls 2505 * almost every other function in this module 2506 * 2507 * Input: 2508 * name the name of the file being read 2509 * fd Open file to makefile to parse 2510 * 2511 * Results: 2512 * None 2513 * 2514 * Side Effects: 2515 * closes fd. 2516 * Loads. Nodes are added to the list of all targets, nodes and links 2517 * are added to the dependency graph. etc. etc. etc. 2518 *--------------------------------------------------------------------- 2519 */ 2520 void 2521 Parse_File(const char *name, int fd) 2522 { 2523 char *cp; /* pointer into the line */ 2524 char *line; /* the line we're working on */ 2525 2526 inLine = FALSE; 2527 fatals = 0; 2528 2529 Parse_SetInput(name, 0, fd, NULL, NULL); 2530 2531 do { 2532 for (; (line = ParseReadLine()) != NULL; ) { 2533 if (DEBUG(PARSE)) 2534 fprintf(debug_file, "ParseReadLine (%d): '%s'\n", 2535 curFile->lineno, line); 2536 if (*line == '.') { 2537 /* 2538 * Lines that begin with the special character may be 2539 * include or undef directives. 2540 * On the other hand they can be suffix rules (.c.o: ...) 2541 * or just dependencies for filenames that start '.'. 2542 */ 2543 for (cp = line + 1; isspace((unsigned char)*cp); cp++) { 2544 continue; 2545 } 2546 if (strncmp(cp, "include", 7) == 0 || 2547 ((cp[0] == 's' || cp[0] == '-') && 2548 strncmp(&cp[1], "include", 7) == 0)) { 2549 ParseDoInclude(cp); 2550 continue; 2551 } 2552 if (strncmp(cp, "undef", 5) == 0) { 2553 char *cp2; 2554 for (cp += 5; isspace((unsigned char) *cp); cp++) 2555 continue; 2556 for (cp2 = cp; !isspace((unsigned char) *cp2) && 2557 (*cp2 != '\0'); cp2++) 2558 continue; 2559 *cp2 = '\0'; 2560 Var_Delete(cp, VAR_GLOBAL); 2561 continue; 2562 } else if (strncmp(cp, "export", 6) == 0) { 2563 for (cp += 6; isspace((unsigned char) *cp); cp++) 2564 continue; 2565 Var_Export(cp, 1); 2566 continue; 2567 } else if (strncmp(cp, "unexport", 8) == 0) { 2568 Var_UnExport(cp); 2569 continue; 2570 } else if (strncmp(cp, "info", 4) == 0 || 2571 strncmp(cp, "error", 5) == 0 || 2572 strncmp(cp, "warning", 7) == 0) { 2573 if (ParseMessage(cp)) 2574 continue; 2575 } 2576 } 2577 2578 if (*line == '\t') { 2579 /* 2580 * If a line starts with a tab, it can only hope to be 2581 * a creation command. 2582 */ 2583 cp = line + 1; 2584 shellCommand: 2585 for (; isspace ((unsigned char)*cp); cp++) { 2586 continue; 2587 } 2588 if (*cp) { 2589 if (!inLine) 2590 Parse_Error(PARSE_FATAL, 2591 "Unassociated shell command \"%s\"", 2592 cp); 2593 /* 2594 * So long as it's not a blank line and we're actually 2595 * in a dependency spec, add the command to the list of 2596 * commands of all targets in the dependency spec 2597 */ 2598 if (targets) { 2599 cp = bmake_strdup(cp); 2600 Lst_ForEach(targets, ParseAddCmd, cp); 2601 #ifdef CLEANUP 2602 Lst_AtEnd(targCmds, cp); 2603 #endif 2604 } 2605 } 2606 continue; 2607 } 2608 2609 #ifdef SYSVINCLUDE 2610 if (((strncmp(line, "include", 7) == 0 && 2611 isspace((unsigned char) line[7])) || 2612 ((line[0] == 's' || line[0] == '-') && 2613 strncmp(&line[1], "include", 7) == 0 && 2614 isspace((unsigned char) line[8]))) && 2615 strchr(line, ':') == NULL) { 2616 /* 2617 * It's an S3/S5-style "include". 2618 */ 2619 ParseTraditionalInclude(line); 2620 continue; 2621 } 2622 #endif 2623 if (Parse_IsVar(line)) { 2624 ParseFinishLine(); 2625 Parse_DoVar(line, VAR_GLOBAL); 2626 continue; 2627 } 2628 2629 #ifndef POSIX 2630 /* 2631 * To make life easier on novices, if the line is indented we 2632 * first make sure the line has a dependency operator in it. 2633 * If it doesn't have an operator and we're in a dependency 2634 * line's script, we assume it's actually a shell command 2635 * and add it to the current list of targets. 2636 */ 2637 cp = line; 2638 if (isspace((unsigned char) line[0])) { 2639 while ((*cp != '\0') && isspace((unsigned char) *cp)) 2640 cp++; 2641 while (*cp && (ParseIsEscaped(line, cp) || 2642 (*cp != ':') && (*cp != '!'))) { 2643 cp++; 2644 } 2645 if (*cp == '\0') { 2646 if (inLine) { 2647 Parse_Error(PARSE_WARNING, 2648 "Shell command needs a leading tab"); 2649 goto shellCommand; 2650 } 2651 } 2652 } 2653 #endif 2654 ParseFinishLine(); 2655 2656 /* 2657 * For some reason - probably to make the parser impossible - 2658 * a ';' can be used to separate commands from dependencies. 2659 * Attempt to avoid ';' inside substitution patterns. 2660 */ 2661 { 2662 int level = 0; 2663 2664 for (cp = line; *cp != 0; cp++) { 2665 if (*cp == '\\' && cp[1] != 0) { 2666 cp++; 2667 continue; 2668 } 2669 if (*cp == '$' && 2670 (cp[1] == '(' || cp[1] == '{')) { 2671 level++; 2672 continue; 2673 } 2674 if (level > 0) { 2675 if (*cp == ')' || *cp == '}') { 2676 level--; 2677 continue; 2678 } 2679 } else if (*cp == ';') { 2680 break; 2681 } 2682 } 2683 } 2684 if (*cp != 0) 2685 /* Terminate the dependency list at the ';' */ 2686 *cp++ = 0; 2687 else 2688 cp = NULL; 2689 2690 /* 2691 * We now know it's a dependency line so it needs to have all 2692 * variables expanded before being parsed. Tell the variable 2693 * module to complain if some variable is undefined... 2694 */ 2695 line = Var_Subst(NULL, line, VAR_CMD, TRUE); 2696 2697 /* 2698 * Need a non-circular list for the target nodes 2699 */ 2700 if (targets) 2701 Lst_Destroy(targets, NULL); 2702 2703 targets = Lst_Init(FALSE); 2704 inLine = TRUE; 2705 2706 ParseDoDependency(line); 2707 free(line); 2708 2709 /* If there were commands after a ';', add them now */ 2710 if (cp != NULL) { 2711 goto shellCommand; 2712 } 2713 } 2714 /* 2715 * Reached EOF, but it may be just EOF of an include file... 2716 */ 2717 } while (ParseEOF() == CONTINUE); 2718 2719 if (fatals) { 2720 (void)fflush(stdout); 2721 (void)fprintf(stderr, 2722 "%s: Fatal errors encountered -- cannot continue\n", 2723 progname); 2724 PrintOnError(NULL, NULL); 2725 exit(1); 2726 } 2727 } 2728 2729 /*- 2730 *--------------------------------------------------------------------- 2731 * Parse_Init -- 2732 * initialize the parsing module 2733 * 2734 * Results: 2735 * none 2736 * 2737 * Side Effects: 2738 * the parseIncPath list is initialized... 2739 *--------------------------------------------------------------------- 2740 */ 2741 void 2742 Parse_Init(void) 2743 { 2744 mainNode = NULL; 2745 parseIncPath = Lst_Init(FALSE); 2746 sysIncPath = Lst_Init(FALSE); 2747 defIncPath = Lst_Init(FALSE); 2748 includes = Lst_Init(FALSE); 2749 #ifdef CLEANUP 2750 targCmds = Lst_Init(FALSE); 2751 #endif 2752 } 2753 2754 void 2755 Parse_End(void) 2756 { 2757 #ifdef CLEANUP 2758 Lst_Destroy(targCmds, (FreeProc *)free); 2759 if (targets) 2760 Lst_Destroy(targets, NULL); 2761 Lst_Destroy(defIncPath, Dir_Destroy); 2762 Lst_Destroy(sysIncPath, Dir_Destroy); 2763 Lst_Destroy(parseIncPath, Dir_Destroy); 2764 Lst_Destroy(includes, NULL); /* Should be empty now */ 2765 #endif 2766 } 2767 2768 2769 /*- 2770 *----------------------------------------------------------------------- 2771 * Parse_MainName -- 2772 * Return a Lst of the main target to create for main()'s sake. If 2773 * no such target exists, we Punt with an obnoxious error message. 2774 * 2775 * Results: 2776 * A Lst of the single node to create. 2777 * 2778 * Side Effects: 2779 * None. 2780 * 2781 *----------------------------------------------------------------------- 2782 */ 2783 Lst 2784 Parse_MainName(void) 2785 { 2786 Lst mainList; /* result list */ 2787 2788 mainList = Lst_Init(FALSE); 2789 2790 if (mainNode == NULL) { 2791 Punt("no target to make."); 2792 /*NOTREACHED*/ 2793 } else if (mainNode->type & OP_DOUBLEDEP) { 2794 (void)Lst_AtEnd(mainList, mainNode); 2795 Lst_Concat(mainList, mainNode->cohorts, LST_CONCNEW); 2796 } 2797 else 2798 (void)Lst_AtEnd(mainList, mainNode); 2799 Var_Append(".TARGETS", mainNode->name, VAR_GLOBAL); 2800 return (mainList); 2801 } 2802 2803 /*- 2804 *----------------------------------------------------------------------- 2805 * ParseMark -- 2806 * Add the filename and lineno to the GNode so that we remember 2807 * where it was first defined. 2808 * 2809 * Side Effects: 2810 * None. 2811 * 2812 *----------------------------------------------------------------------- 2813 */ 2814 static void 2815 ParseMark(GNode *gn) 2816 { 2817 gn->fname = curFile->fname; 2818 gn->lineno = curFile->lineno; 2819 } 2820