1 /* $NetBSD: parse.c,v 1.204 2014/09/18 08:06:13 dholland 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 1.204 2014/09/18 08:06:13 dholland 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 1.204 2014/09/18 08:06:13 dholland 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 <sys/types.h>
127 #include <sys/mman.h>
128 #include <sys/stat.h>
129 #include <assert.h>
130 #include <ctype.h>
131 #include <errno.h>
132 #include <fcntl.h>
133 #include <stdarg.h>
134 #include <stdio.h>
135
136 #ifndef MAP_FILE
137 #define MAP_FILE 0
138 #endif
139 #ifndef MAP_COPY
140 #define MAP_COPY MAP_PRIVATE
141 #endif
142
143 #include "make.h"
144 #include "hash.h"
145 #include "dir.h"
146 #include "job.h"
147 #include "buf.h"
148 #include "pathnames.h"
149
150 ////////////////////////////////////////////////////////////
151 // types and constants
152
153 /*
154 * Structure for a file being read ("included file")
155 */
156 typedef struct IFile {
157 char *fname; /* name of file */
158 int lineno; /* current line number in file */
159 int first_lineno; /* line number of start of text */
160 int cond_depth; /* 'if' nesting when file opened */
161 char *P_str; /* point to base of string buffer */
162 char *P_ptr; /* point to next char of string buffer */
163 char *P_end; /* point to the end of string buffer */
164 char *(*nextbuf)(void *, size_t *); /* Function to get more data */
165 void *nextbuf_arg; /* Opaque arg for nextbuf() */
166 struct loadedfile *lf; /* loadedfile object, if any */
167 } IFile;
168
169
170 /*
171 * These values are returned by ParseEOF to tell Parse_File whether to
172 * CONTINUE parsing, i.e. it had only reached the end of an include file,
173 * or if it's DONE.
174 */
175 #define CONTINUE 1
176 #define DONE 0
177
178 /*
179 * Tokens for target attributes
180 */
181 typedef enum {
182 Begin, /* .BEGIN */
183 Default, /* .DEFAULT */
184 End, /* .END */
185 dotError, /* .ERROR */
186 Ignore, /* .IGNORE */
187 Includes, /* .INCLUDES */
188 Interrupt, /* .INTERRUPT */
189 Libs, /* .LIBS */
190 Meta, /* .META */
191 MFlags, /* .MFLAGS or .MAKEFLAGS */
192 Main, /* .MAIN and we don't have anything user-specified to
193 * make */
194 NoExport, /* .NOEXPORT */
195 NoMeta, /* .NOMETA */
196 NoMetaCmp, /* .NOMETA_CMP */
197 NoPath, /* .NOPATH */
198 Not, /* Not special */
199 NotParallel, /* .NOTPARALLEL */
200 Null, /* .NULL */
201 ExObjdir, /* .OBJDIR */
202 Order, /* .ORDER */
203 Parallel, /* .PARALLEL */
204 ExPath, /* .PATH */
205 Phony, /* .PHONY */
206 #ifdef POSIX
207 Posix, /* .POSIX */
208 #endif
209 Precious, /* .PRECIOUS */
210 ExShell, /* .SHELL */
211 Silent, /* .SILENT */
212 SingleShell, /* .SINGLESHELL */
213 Stale, /* .STALE */
214 Suffixes, /* .SUFFIXES */
215 Wait, /* .WAIT */
216 Attribute /* Generic attribute */
217 } ParseSpecial;
218
219 /*
220 * Other tokens
221 */
222 #define LPAREN '('
223 #define RPAREN ')'
224
225
226 ////////////////////////////////////////////////////////////
227 // result data
228
229 /*
230 * The main target to create. This is the first target on the first
231 * dependency line in the first makefile.
232 */
233 static GNode *mainNode;
234
235 ////////////////////////////////////////////////////////////
236 // eval state
237
238 /* targets we're working on */
239 static Lst targets;
240
241 #ifdef CLEANUP
242 /* command lines for targets */
243 static Lst targCmds;
244 #endif
245
246 /*
247 * specType contains the SPECial TYPE of the current target. It is
248 * Not if the target is unspecial. If it *is* special, however, the children
249 * are linked as children of the parent but not vice versa. This variable is
250 * set in ParseDoDependency
251 */
252 static ParseSpecial specType;
253
254 /*
255 * Predecessor node for handling .ORDER. Initialized to NULL when .ORDER
256 * seen, then set to each successive source on the line.
257 */
258 static GNode *predecessor;
259
260 ////////////////////////////////////////////////////////////
261 // parser state
262
263 /* true if currently in a dependency line or its commands */
264 static Boolean inLine;
265
266 /* number of fatal errors */
267 static int fatals = 0;
268
269 /*
270 * Variables for doing includes
271 */
272
273 /* current file being read */
274 static IFile *curFile;
275
276 /* stack of IFiles generated by .includes */
277 static Lst includes;
278
279 /* include paths (lists of directories) */
280 Lst parseIncPath; /* dirs for "..." includes */
281 Lst sysIncPath; /* dirs for <...> includes */
282 Lst defIncPath; /* default for sysIncPath */
283
284 ////////////////////////////////////////////////////////////
285 // parser tables
286
287 /*
288 * The parseKeywords table is searched using binary search when deciding
289 * if a target or source is special. The 'spec' field is the ParseSpecial
290 * type of the keyword ("Not" if the keyword isn't special as a target) while
291 * the 'op' field is the operator to apply to the list of targets if the
292 * keyword is used as a source ("0" if the keyword isn't special as a source)
293 */
294 static const struct {
295 const char *name; /* Name of keyword */
296 ParseSpecial spec; /* Type when used as a target */
297 int op; /* Operator when used as a source */
298 } parseKeywords[] = {
299 { ".BEGIN", Begin, 0 },
300 { ".DEFAULT", Default, 0 },
301 { ".END", End, 0 },
302 { ".ERROR", dotError, 0 },
303 { ".EXEC", Attribute, OP_EXEC },
304 { ".IGNORE", Ignore, OP_IGNORE },
305 { ".INCLUDES", Includes, 0 },
306 { ".INTERRUPT", Interrupt, 0 },
307 { ".INVISIBLE", Attribute, OP_INVISIBLE },
308 { ".JOIN", Attribute, OP_JOIN },
309 { ".LIBS", Libs, 0 },
310 { ".MADE", Attribute, OP_MADE },
311 { ".MAIN", Main, 0 },
312 { ".MAKE", Attribute, OP_MAKE },
313 { ".MAKEFLAGS", MFlags, 0 },
314 { ".META", Meta, OP_META },
315 { ".MFLAGS", MFlags, 0 },
316 { ".NOMETA", NoMeta, OP_NOMETA },
317 { ".NOMETA_CMP", NoMetaCmp, OP_NOMETA_CMP },
318 { ".NOPATH", NoPath, OP_NOPATH },
319 { ".NOTMAIN", Attribute, OP_NOTMAIN },
320 { ".NOTPARALLEL", NotParallel, 0 },
321 { ".NO_PARALLEL", NotParallel, 0 },
322 { ".NULL", Null, 0 },
323 { ".OBJDIR", ExObjdir, 0 },
324 { ".OPTIONAL", Attribute, OP_OPTIONAL },
325 { ".ORDER", Order, 0 },
326 { ".PARALLEL", Parallel, 0 },
327 { ".PATH", ExPath, 0 },
328 { ".PHONY", Phony, OP_PHONY },
329 #ifdef POSIX
330 { ".POSIX", Posix, 0 },
331 #endif
332 { ".PRECIOUS", Precious, OP_PRECIOUS },
333 { ".RECURSIVE", Attribute, OP_MAKE },
334 { ".SHELL", ExShell, 0 },
335 { ".SILENT", Silent, OP_SILENT },
336 { ".SINGLESHELL", SingleShell, 0 },
337 { ".STALE", Stale, 0 },
338 { ".SUFFIXES", Suffixes, 0 },
339 { ".USE", Attribute, OP_USE },
340 { ".USEBEFORE", Attribute, OP_USEBEFORE },
341 { ".WAIT", Wait, 0 },
342 };
343
344 ////////////////////////////////////////////////////////////
345 // local functions
346
347 static int ParseIsEscaped(const char *, const char *);
348 static void ParseErrorInternal(const char *, size_t, int, const char *, ...)
349 MAKE_ATTR_PRINTFLIKE(4,5);
350 static void ParseVErrorInternal(FILE *, const char *, size_t, int, const char *, va_list)
351 MAKE_ATTR_PRINTFLIKE(5, 0);
352 static int ParseFindKeyword(const char *);
353 static int ParseLinkSrc(void *, void *);
354 static int ParseDoOp(void *, void *);
355 static void ParseDoSrc(int, const char *);
356 static int ParseFindMain(void *, void *);
357 static int ParseAddDir(void *, void *);
358 static int ParseClearPath(void *, void *);
359 static void ParseDoDependency(char *);
360 static int ParseAddCmd(void *, void *);
361 static void ParseHasCommands(void *);
362 static void ParseDoInclude(char *);
363 static void ParseSetParseFile(const char *);
364 static void ParseSetIncludedFile(void);
365 #ifdef SYSVINCLUDE
366 static void ParseTraditionalInclude(char *);
367 #endif
368 #ifdef GMAKEEXPORT
369 static void ParseGmakeExport(char *);
370 #endif
371 static int ParseEOF(void);
372 static char *ParseReadLine(void);
373 static void ParseFinishLine(void);
374 static void ParseMark(GNode *);
375
376 ////////////////////////////////////////////////////////////
377 // file loader
378
379 struct loadedfile {
380 const char *path; /* name, for error reports */
381 char *buf; /* contents buffer */
382 size_t len; /* length of contents */
383 size_t maplen; /* length of mmap area, or 0 */
384 Boolean used; /* XXX: have we used the data yet */
385 };
386
387 /*
388 * Constructor/destructor for loadedfile
389 */
390 static struct loadedfile *
loadedfile_create(const char * path)391 loadedfile_create(const char *path)
392 {
393 struct loadedfile *lf;
394
395 lf = bmake_malloc(sizeof(*lf));
396 lf->path = (path == NULL ? "(stdin)" : path);
397 lf->buf = NULL;
398 lf->len = 0;
399 lf->maplen = 0;
400 lf->used = FALSE;
401 return lf;
402 }
403
404 static void
loadedfile_destroy(struct loadedfile * lf)405 loadedfile_destroy(struct loadedfile *lf)
406 {
407 if (lf->buf != NULL) {
408 if (lf->maplen > 0) {
409 munmap(lf->buf, lf->maplen);
410 } else {
411 free(lf->buf);
412 }
413 }
414 free(lf);
415 }
416
417 /*
418 * nextbuf() operation for loadedfile, as needed by the weird and twisted
419 * logic below. Once that's cleaned up, we can get rid of lf->used...
420 */
421 static char *
loadedfile_nextbuf(void * x,size_t * len)422 loadedfile_nextbuf(void *x, size_t *len)
423 {
424 struct loadedfile *lf = x;
425
426 if (lf->used) {
427 return NULL;
428 }
429 lf->used = TRUE;
430 *len = lf->len;
431 return lf->buf;
432 }
433
434 /*
435 * Try to get the size of a file.
436 */
437 static ReturnStatus
load_getsize(int fd,size_t * ret)438 load_getsize(int fd, size_t *ret)
439 {
440 struct stat st;
441
442 if (fstat(fd, &st) < 0) {
443 return FAILURE;
444 }
445
446 if (!S_ISREG(st.st_mode)) {
447 return FAILURE;
448 }
449
450 /*
451 * st_size is an off_t, which is 64 bits signed; *ret is
452 * size_t, which might be 32 bits unsigned or 64 bits
453 * unsigned. Rather than being elaborate, just punt on
454 * files that are more than 2^31 bytes. We should never
455 * see a makefile that size in practice...
456 *
457 * While we're at it reject negative sizes too, just in case.
458 */
459 if (st.st_size < 0 || st.st_size > 0x7fffffff) {
460 return FAILURE;
461 }
462
463 *ret = (size_t) st.st_size;
464 return SUCCESS;
465 }
466
467 /*
468 * Read in a file.
469 *
470 * Until the path search logic can be moved under here instead of
471 * being in the caller in another source file, we need to have the fd
472 * passed in already open. Bleh.
473 *
474 * If the path is NULL use stdin and (to insure against fd leaks)
475 * assert that the caller passed in -1.
476 */
477 static struct loadedfile *
loadfile(const char * path,int fd)478 loadfile(const char *path, int fd)
479 {
480 struct loadedfile *lf;
481 long pagesize;
482 ssize_t result;
483 size_t bufpos;
484
485 lf = loadedfile_create(path);
486
487 if (path == NULL) {
488 assert(fd == -1);
489 fd = STDIN_FILENO;
490 } else {
491 #if 0 /* notyet */
492 fd = open(path, O_RDONLY);
493 if (fd < 0) {
494 ...
495 Error("%s: %s", path, strerror(errno));
496 exit(1);
497 }
498 #endif
499 }
500
501 if (load_getsize(fd, &lf->len) == SUCCESS) {
502 /* found a size, try mmap */
503 pagesize = sysconf(_SC_PAGESIZE);
504 if (pagesize <= 0) {
505 pagesize = 0x1000;
506 }
507 /* round size up to a page */
508 lf->maplen = pagesize * ((lf->len + pagesize - 1)/pagesize);
509
510 /*
511 * XXX hack for dealing with empty files; remove when
512 * we're no longer limited by interfacing to the old
513 * logic elsewhere in this file.
514 */
515 if (lf->maplen == 0) {
516 lf->maplen = pagesize;
517 }
518
519 /*
520 * FUTURE: remove PROT_WRITE when the parser no longer
521 * needs to scribble on the input.
522 */
523 lf->buf = mmap(NULL, lf->maplen, PROT_READ|PROT_WRITE,
524 MAP_FILE|MAP_COPY, fd, 0);
525 if (lf->buf != MAP_FAILED) {
526 /* succeeded */
527 if (lf->len == lf->maplen && lf->buf[lf->len - 1] != '\n') {
528 char *b = malloc(lf->len + 1);
529 b[lf->len] = '\n';
530 memcpy(b, lf->buf, lf->len++);
531 munmap(lf->buf, lf->maplen);
532 lf->maplen = 0;
533 lf->buf = b;
534 }
535 goto done;
536 }
537 }
538
539 /* cannot mmap; load the traditional way */
540
541 lf->maplen = 0;
542 lf->len = 1024;
543 lf->buf = bmake_malloc(lf->len);
544
545 bufpos = 0;
546 while (1) {
547 assert(bufpos <= lf->len);
548 if (bufpos == lf->len) {
549 lf->len *= 2;
550 lf->buf = bmake_realloc(lf->buf, lf->len);
551 }
552 result = read(fd, lf->buf + bufpos, lf->len - bufpos);
553 if (result < 0) {
554 Error("%s: read error: %s", path, strerror(errno));
555 exit(1);
556 }
557 if (result == 0) {
558 break;
559 }
560 bufpos += result;
561 }
562 assert(bufpos <= lf->len);
563 lf->len = bufpos;
564
565 /* truncate malloc region to actual length (maybe not useful) */
566 if (lf->len > 0) {
567 lf->buf = bmake_realloc(lf->buf, lf->len);
568 }
569
570 done:
571 if (path != NULL) {
572 close(fd);
573 }
574 return lf;
575 }
576
577 ////////////////////////////////////////////////////////////
578 // old code
579
580 /*-
581 *----------------------------------------------------------------------
582 * ParseIsEscaped --
583 * Check if the current character is escaped on the current line
584 *
585 * Results:
586 * 0 if the character is not backslash escaped, 1 otherwise
587 *
588 * Side Effects:
589 * None
590 *----------------------------------------------------------------------
591 */
592 static int
ParseIsEscaped(const char * line,const char * c)593 ParseIsEscaped(const char *line, const char *c)
594 {
595 int active = 0;
596 for (;;) {
597 if (line == c)
598 return active;
599 if (*--c != '\\')
600 return active;
601 active = !active;
602 }
603 }
604
605 /*-
606 *----------------------------------------------------------------------
607 * ParseFindKeyword --
608 * Look in the table of keywords for one matching the given string.
609 *
610 * Input:
611 * str String to find
612 *
613 * Results:
614 * The index of the keyword, or -1 if it isn't there.
615 *
616 * Side Effects:
617 * None
618 *----------------------------------------------------------------------
619 */
620 static int
ParseFindKeyword(const char * str)621 ParseFindKeyword(const char *str)
622 {
623 int start, end, cur;
624 int diff;
625
626 start = 0;
627 end = (sizeof(parseKeywords)/sizeof(parseKeywords[0])) - 1;
628
629 do {
630 cur = start + ((end - start) / 2);
631 diff = strcmp(str, parseKeywords[cur].name);
632
633 if (diff == 0) {
634 return (cur);
635 } else if (diff < 0) {
636 end = cur - 1;
637 } else {
638 start = cur + 1;
639 }
640 } while (start <= end);
641 return (-1);
642 }
643
644 /*-
645 * ParseVErrorInternal --
646 * Error message abort function for parsing. Prints out the context
647 * of the error (line number and file) as well as the message with
648 * two optional arguments.
649 *
650 * Results:
651 * None
652 *
653 * Side Effects:
654 * "fatals" is incremented if the level is PARSE_FATAL.
655 */
656 /* VARARGS */
657 static void
ParseVErrorInternal(FILE * f,const char * cfname,size_t clineno,int type,const char * fmt,va_list ap)658 ParseVErrorInternal(FILE *f, const char *cfname, size_t clineno, int type,
659 const char *fmt, va_list ap)
660 {
661 static Boolean fatal_warning_error_printed = FALSE;
662
663 (void)fprintf(f, "%s: ", progname);
664
665 if (cfname != NULL) {
666 (void)fprintf(f, "\"");
667 if (*cfname != '/' && strcmp(cfname, "(stdin)") != 0) {
668 char *cp;
669 const char *dir;
670
671 /*
672 * Nothing is more annoying than not knowing
673 * which Makefile is the culprit.
674 */
675 dir = Var_Value(".PARSEDIR", VAR_GLOBAL, &cp);
676 if (dir == NULL || *dir == '\0' ||
677 (*dir == '.' && dir[1] == '\0'))
678 dir = Var_Value(".CURDIR", VAR_GLOBAL, &cp);
679 if (dir == NULL)
680 dir = ".";
681
682 (void)fprintf(f, "%s/%s", dir, cfname);
683 } else
684 (void)fprintf(f, "%s", cfname);
685
686 (void)fprintf(f, "\" line %d: ", (int)clineno);
687 }
688 if (type == PARSE_WARNING)
689 (void)fprintf(f, "warning: ");
690 (void)vfprintf(f, fmt, ap);
691 (void)fprintf(f, "\n");
692 (void)fflush(f);
693 if (type == PARSE_FATAL || parseWarnFatal)
694 fatals += 1;
695 if (parseWarnFatal && !fatal_warning_error_printed) {
696 Error("parsing warnings being treated as errors");
697 fatal_warning_error_printed = TRUE;
698 }
699 }
700
701 /*-
702 * ParseErrorInternal --
703 * Error function
704 *
705 * Results:
706 * None
707 *
708 * Side Effects:
709 * None
710 */
711 /* VARARGS */
712 static void
ParseErrorInternal(const char * cfname,size_t clineno,int type,const char * fmt,...)713 ParseErrorInternal(const char *cfname, size_t clineno, int type,
714 const char *fmt, ...)
715 {
716 va_list ap;
717
718 va_start(ap, fmt);
719 (void)fflush(stdout);
720 ParseVErrorInternal(stderr, cfname, clineno, type, fmt, ap);
721 va_end(ap);
722
723 if (debug_file != stderr && debug_file != stdout) {
724 va_start(ap, fmt);
725 ParseVErrorInternal(debug_file, cfname, clineno, type, fmt, ap);
726 va_end(ap);
727 }
728 }
729
730 /*-
731 * Parse_Error --
732 * External interface to ParseErrorInternal; uses the default filename
733 * Line number.
734 *
735 * Results:
736 * None
737 *
738 * Side Effects:
739 * None
740 */
741 /* VARARGS */
742 void
Parse_Error(int type,const char * fmt,...)743 Parse_Error(int type, const char *fmt, ...)
744 {
745 va_list ap;
746 const char *fname;
747 size_t lineno;
748
749 if (curFile == NULL) {
750 fname = NULL;
751 lineno = 0;
752 } else {
753 fname = curFile->fname;
754 lineno = curFile->lineno;
755 }
756
757 va_start(ap, fmt);
758 (void)fflush(stdout);
759 ParseVErrorInternal(stderr, fname, lineno, type, fmt, ap);
760 va_end(ap);
761
762 if (debug_file != stderr && debug_file != stdout) {
763 va_start(ap, fmt);
764 ParseVErrorInternal(debug_file, fname, lineno, type, fmt, ap);
765 va_end(ap);
766 }
767 }
768
769
770 /*
771 * ParseMessage
772 * Parse a .info .warning or .error directive
773 *
774 * The input is the line minus the ".". We substitute
775 * variables, print the message and exit(1) (for .error) or just print
776 * a warning if the directive is malformed.
777 */
778 static Boolean
ParseMessage(char * line)779 ParseMessage(char *line)
780 {
781 int mtype;
782
783 switch(*line) {
784 case 'i':
785 mtype = 0;
786 break;
787 case 'w':
788 mtype = PARSE_WARNING;
789 break;
790 case 'e':
791 mtype = PARSE_FATAL;
792 break;
793 default:
794 Parse_Error(PARSE_WARNING, "invalid syntax: \".%s\"", line);
795 return FALSE;
796 }
797
798 while (isalpha((u_char)*line))
799 line++;
800 if (!isspace((u_char)*line))
801 return FALSE; /* not for us */
802 while (isspace((u_char)*line))
803 line++;
804
805 line = Var_Subst(NULL, line, VAR_CMD, 0);
806 Parse_Error(mtype, "%s", line);
807 free(line);
808
809 if (mtype == PARSE_FATAL) {
810 /* Terminate immediately. */
811 exit(1);
812 }
813 return TRUE;
814 }
815
816 /*-
817 *---------------------------------------------------------------------
818 * ParseLinkSrc --
819 * Link the parent node to its new child. Used in a Lst_ForEach by
820 * ParseDoDependency. If the specType isn't 'Not', the parent
821 * isn't linked as a parent of the child.
822 *
823 * Input:
824 * pgnp The parent node
825 * cgpn The child node
826 *
827 * Results:
828 * Always = 0
829 *
830 * Side Effects:
831 * New elements are added to the parents list of cgn and the
832 * children list of cgn. the unmade field of pgn is updated
833 * to reflect the additional child.
834 *---------------------------------------------------------------------
835 */
836 static int
ParseLinkSrc(void * pgnp,void * cgnp)837 ParseLinkSrc(void *pgnp, void *cgnp)
838 {
839 GNode *pgn = (GNode *)pgnp;
840 GNode *cgn = (GNode *)cgnp;
841
842 if ((pgn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (pgn->cohorts))
843 pgn = (GNode *)Lst_Datum(Lst_Last(pgn->cohorts));
844 (void)Lst_AtEnd(pgn->children, cgn);
845 if (specType == Not)
846 (void)Lst_AtEnd(cgn->parents, pgn);
847 pgn->unmade += 1;
848 if (DEBUG(PARSE)) {
849 fprintf(debug_file, "# %s: added child %s - %s\n", __func__,
850 pgn->name, cgn->name);
851 Targ_PrintNode(pgn, 0);
852 Targ_PrintNode(cgn, 0);
853 }
854 return (0);
855 }
856
857 /*-
858 *---------------------------------------------------------------------
859 * ParseDoOp --
860 * Apply the parsed operator to the given target node. Used in a
861 * Lst_ForEach call by ParseDoDependency once all targets have
862 * been found and their operator parsed. If the previous and new
863 * operators are incompatible, a major error is taken.
864 *
865 * Input:
866 * gnp The node to which the operator is to be applied
867 * opp The operator to apply
868 *
869 * Results:
870 * Always 0
871 *
872 * Side Effects:
873 * The type field of the node is altered to reflect any new bits in
874 * the op.
875 *---------------------------------------------------------------------
876 */
877 static int
ParseDoOp(void * gnp,void * opp)878 ParseDoOp(void *gnp, void *opp)
879 {
880 GNode *gn = (GNode *)gnp;
881 int op = *(int *)opp;
882 /*
883 * If the dependency mask of the operator and the node don't match and
884 * the node has actually had an operator applied to it before, and
885 * the operator actually has some dependency information in it, complain.
886 */
887 if (((op & OP_OPMASK) != (gn->type & OP_OPMASK)) &&
888 !OP_NOP(gn->type) && !OP_NOP(op))
889 {
890 Parse_Error(PARSE_FATAL, "Inconsistent operator for %s", gn->name);
891 return (1);
892 }
893
894 if ((op == OP_DOUBLEDEP) && ((gn->type & OP_OPMASK) == OP_DOUBLEDEP)) {
895 /*
896 * If the node was the object of a :: operator, we need to create a
897 * new instance of it for the children and commands on this dependency
898 * line. The new instance is placed on the 'cohorts' list of the
899 * initial one (note the initial one is not on its own cohorts list)
900 * and the new instance is linked to all parents of the initial
901 * instance.
902 */
903 GNode *cohort;
904
905 /*
906 * Propagate copied bits to the initial node. They'll be propagated
907 * back to the rest of the cohorts later.
908 */
909 gn->type |= op & ~OP_OPMASK;
910
911 cohort = Targ_FindNode(gn->name, TARG_NOHASH);
912 if (doing_depend)
913 ParseMark(cohort);
914 /*
915 * Make the cohort invisible as well to avoid duplicating it into
916 * other variables. True, parents of this target won't tend to do
917 * anything with their local variables, but better safe than
918 * sorry. (I think this is pointless now, since the relevant list
919 * traversals will no longer see this node anyway. -mycroft)
920 */
921 cohort->type = op | OP_INVISIBLE;
922 (void)Lst_AtEnd(gn->cohorts, cohort);
923 cohort->centurion = gn;
924 gn->unmade_cohorts += 1;
925 snprintf(cohort->cohort_num, sizeof cohort->cohort_num, "#%d",
926 gn->unmade_cohorts);
927 } else {
928 /*
929 * We don't want to nuke any previous flags (whatever they were) so we
930 * just OR the new operator into the old
931 */
932 gn->type |= op;
933 }
934
935 return (0);
936 }
937
938 /*-
939 *---------------------------------------------------------------------
940 * ParseDoSrc --
941 * Given the name of a source, figure out if it is an attribute
942 * and apply it to the targets if it is. Else decide if there is
943 * some attribute which should be applied *to* the source because
944 * of some special target and apply it if so. Otherwise, make the
945 * source be a child of the targets in the list 'targets'
946 *
947 * Input:
948 * tOp operator (if any) from special targets
949 * src name of the source to handle
950 *
951 * Results:
952 * None
953 *
954 * Side Effects:
955 * Operator bits may be added to the list of targets or to the source.
956 * The targets may have a new source added to their lists of children.
957 *---------------------------------------------------------------------
958 */
959 static void
ParseDoSrc(int tOp,const char * src)960 ParseDoSrc(int tOp, const char *src)
961 {
962 GNode *gn = NULL;
963 static int wait_number = 0;
964 char wait_src[16];
965
966 if (*src == '.' && isupper ((unsigned char)src[1])) {
967 int keywd = ParseFindKeyword(src);
968 if (keywd != -1) {
969 int op = parseKeywords[keywd].op;
970 if (op != 0) {
971 Lst_ForEach(targets, ParseDoOp, &op);
972 return;
973 }
974 if (parseKeywords[keywd].spec == Wait) {
975 /*
976 * We add a .WAIT node in the dependency list.
977 * After any dynamic dependencies (and filename globbing)
978 * have happened, it is given a dependency on the each
979 * previous child back to and previous .WAIT node.
980 * The next child won't be scheduled until the .WAIT node
981 * is built.
982 * We give each .WAIT node a unique name (mainly for diag).
983 */
984 snprintf(wait_src, sizeof wait_src, ".WAIT_%u", ++wait_number);
985 gn = Targ_FindNode(wait_src, TARG_NOHASH);
986 if (doing_depend)
987 ParseMark(gn);
988 gn->type = OP_WAIT | OP_PHONY | OP_DEPENDS | OP_NOTMAIN;
989 Lst_ForEach(targets, ParseLinkSrc, gn);
990 return;
991 }
992 }
993 }
994
995 switch (specType) {
996 case Main:
997 /*
998 * If we have noted the existence of a .MAIN, it means we need
999 * to add the sources of said target to the list of things
1000 * to create. The string 'src' is likely to be free, so we
1001 * must make a new copy of it. Note that this will only be
1002 * invoked if the user didn't specify a target on the command
1003 * line. This is to allow #ifmake's to succeed, or something...
1004 */
1005 (void)Lst_AtEnd(create, bmake_strdup(src));
1006 /*
1007 * Add the name to the .TARGETS variable as well, so the user can
1008 * employ that, if desired.
1009 */
1010 Var_Append(".TARGETS", src, VAR_GLOBAL);
1011 return;
1012
1013 case Order:
1014 /*
1015 * Create proper predecessor/successor links between the previous
1016 * source and the current one.
1017 */
1018 gn = Targ_FindNode(src, TARG_CREATE);
1019 if (doing_depend)
1020 ParseMark(gn);
1021 if (predecessor != NULL) {
1022 (void)Lst_AtEnd(predecessor->order_succ, gn);
1023 (void)Lst_AtEnd(gn->order_pred, predecessor);
1024 if (DEBUG(PARSE)) {
1025 fprintf(debug_file, "# %s: added Order dependency %s - %s\n",
1026 __func__, predecessor->name, gn->name);
1027 Targ_PrintNode(predecessor, 0);
1028 Targ_PrintNode(gn, 0);
1029 }
1030 }
1031 /*
1032 * The current source now becomes the predecessor for the next one.
1033 */
1034 predecessor = gn;
1035 break;
1036
1037 default:
1038 /*
1039 * If the source is not an attribute, we need to find/create
1040 * a node for it. After that we can apply any operator to it
1041 * from a special target or link it to its parents, as
1042 * appropriate.
1043 *
1044 * In the case of a source that was the object of a :: operator,
1045 * the attribute is applied to all of its instances (as kept in
1046 * the 'cohorts' list of the node) or all the cohorts are linked
1047 * to all the targets.
1048 */
1049
1050 /* Find/create the 'src' node and attach to all targets */
1051 gn = Targ_FindNode(src, TARG_CREATE);
1052 if (doing_depend)
1053 ParseMark(gn);
1054 if (tOp) {
1055 gn->type |= tOp;
1056 } else {
1057 Lst_ForEach(targets, ParseLinkSrc, gn);
1058 }
1059 break;
1060 }
1061 }
1062
1063 /*-
1064 *-----------------------------------------------------------------------
1065 * ParseFindMain --
1066 * Find a real target in the list and set it to be the main one.
1067 * Called by ParseDoDependency when a main target hasn't been found
1068 * yet.
1069 *
1070 * Input:
1071 * gnp Node to examine
1072 *
1073 * Results:
1074 * 0 if main not found yet, 1 if it is.
1075 *
1076 * Side Effects:
1077 * mainNode is changed and Targ_SetMain is called.
1078 *
1079 *-----------------------------------------------------------------------
1080 */
1081 static int
ParseFindMain(void * gnp,void * dummy)1082 ParseFindMain(void *gnp, void *dummy)
1083 {
1084 GNode *gn = (GNode *)gnp;
1085 if ((gn->type & OP_NOTARGET) == 0) {
1086 mainNode = gn;
1087 Targ_SetMain(gn);
1088 return (dummy ? 1 : 1);
1089 } else {
1090 return (dummy ? 0 : 0);
1091 }
1092 }
1093
1094 /*-
1095 *-----------------------------------------------------------------------
1096 * ParseAddDir --
1097 * Front-end for Dir_AddDir to make sure Lst_ForEach keeps going
1098 *
1099 * Results:
1100 * === 0
1101 *
1102 * Side Effects:
1103 * See Dir_AddDir.
1104 *
1105 *-----------------------------------------------------------------------
1106 */
1107 static int
ParseAddDir(void * path,void * name)1108 ParseAddDir(void *path, void *name)
1109 {
1110 (void)Dir_AddDir((Lst) path, (char *)name);
1111 return(0);
1112 }
1113
1114 /*-
1115 *-----------------------------------------------------------------------
1116 * ParseClearPath --
1117 * Front-end for Dir_ClearPath to make sure Lst_ForEach keeps going
1118 *
1119 * Results:
1120 * === 0
1121 *
1122 * Side Effects:
1123 * See Dir_ClearPath
1124 *
1125 *-----------------------------------------------------------------------
1126 */
1127 static int
ParseClearPath(void * path,void * dummy)1128 ParseClearPath(void *path, void *dummy)
1129 {
1130 Dir_ClearPath((Lst) path);
1131 return(dummy ? 0 : 0);
1132 }
1133
1134 /*-
1135 *---------------------------------------------------------------------
1136 * ParseDoDependency --
1137 * Parse the dependency line in line.
1138 *
1139 * Input:
1140 * line the line to parse
1141 *
1142 * Results:
1143 * None
1144 *
1145 * Side Effects:
1146 * The nodes of the sources are linked as children to the nodes of the
1147 * targets. Some nodes may be created.
1148 *
1149 * We parse a dependency line by first extracting words from the line and
1150 * finding nodes in the list of all targets with that name. This is done
1151 * until a character is encountered which is an operator character. Currently
1152 * these are only ! and :. At this point the operator is parsed and the
1153 * pointer into the line advanced until the first source is encountered.
1154 * The parsed operator is applied to each node in the 'targets' list,
1155 * which is where the nodes found for the targets are kept, by means of
1156 * the ParseDoOp function.
1157 * The sources are read in much the same way as the targets were except
1158 * that now they are expanded using the wildcarding scheme of the C-Shell
1159 * and all instances of the resulting words in the list of all targets
1160 * are found. Each of the resulting nodes is then linked to each of the
1161 * targets as one of its children.
1162 * Certain targets are handled specially. These are the ones detailed
1163 * by the specType variable.
1164 * The storing of transformation rules is also taken care of here.
1165 * A target is recognized as a transformation rule by calling
1166 * Suff_IsTransform. If it is a transformation rule, its node is gotten
1167 * from the suffix module via Suff_AddTransform rather than the standard
1168 * Targ_FindNode in the target module.
1169 *---------------------------------------------------------------------
1170 */
1171 static void
ParseDoDependency(char * line)1172 ParseDoDependency(char *line)
1173 {
1174 char *cp; /* our current position */
1175 GNode *gn = NULL; /* a general purpose temporary node */
1176 int op; /* the operator on the line */
1177 char savec; /* a place to save a character */
1178 Lst paths; /* List of search paths to alter when parsing
1179 * a list of .PATH targets */
1180 int tOp; /* operator from special target */
1181 Lst sources; /* list of archive source names after
1182 * expansion */
1183 Lst curTargs; /* list of target names to be found and added
1184 * to the targets list */
1185 char *lstart = line;
1186
1187 if (DEBUG(PARSE))
1188 fprintf(debug_file, "ParseDoDependency(%s)\n", line);
1189 tOp = 0;
1190
1191 specType = Not;
1192 paths = NULL;
1193
1194 curTargs = Lst_Init(FALSE);
1195
1196 /*
1197 * First, grind through the targets.
1198 */
1199
1200 do {
1201 /*
1202 * Here LINE points to the beginning of the next word, and
1203 * LSTART points to the actual beginning of the line.
1204 */
1205
1206 /* Find the end of the next word. */
1207 for (cp = line; *cp && (ParseIsEscaped(lstart, cp) ||
1208 !(isspace((unsigned char)*cp) ||
1209 *cp == '!' || *cp == ':' || *cp == LPAREN));
1210 cp++) {
1211 if (*cp == '$') {
1212 /*
1213 * Must be a dynamic source (would have been expanded
1214 * otherwise), so call the Var module to parse the puppy
1215 * so we can safely advance beyond it...There should be
1216 * no errors in this, as they would have been discovered
1217 * in the initial Var_Subst and we wouldn't be here.
1218 */
1219 int length;
1220 void *freeIt;
1221
1222 (void)Var_Parse(cp, VAR_CMD, TRUE, &length, &freeIt);
1223 if (freeIt)
1224 free(freeIt);
1225 cp += length-1;
1226 }
1227 }
1228
1229 /*
1230 * If the word is followed by a left parenthesis, it's the
1231 * name of an object file inside an archive (ar file).
1232 */
1233 if (!ParseIsEscaped(lstart, cp) && *cp == LPAREN) {
1234 /*
1235 * Archives must be handled specially to make sure the OP_ARCHV
1236 * flag is set in their 'type' field, for one thing, and because
1237 * things like "archive(file1.o file2.o file3.o)" are permissible.
1238 * Arch_ParseArchive will set 'line' to be the first non-blank
1239 * after the archive-spec. It creates/finds nodes for the members
1240 * and places them on the given list, returning SUCCESS if all
1241 * went well and FAILURE if there was an error in the
1242 * specification. On error, line should remain untouched.
1243 */
1244 if (Arch_ParseArchive(&line, targets, VAR_CMD) != SUCCESS) {
1245 Parse_Error(PARSE_FATAL,
1246 "Error in archive specification: \"%s\"", line);
1247 goto out;
1248 } else {
1249 /* Done with this word; on to the next. */
1250 continue;
1251 }
1252 }
1253
1254 if (!*cp) {
1255 /*
1256 * We got to the end of the line while we were still
1257 * looking at targets.
1258 *
1259 * Ending a dependency line without an operator is a Bozo
1260 * no-no. As a heuristic, this is also often triggered by
1261 * undetected conflicts from cvs/rcs merges.
1262 */
1263 if ((strncmp(line, "<<<<<<", 6) == 0) ||
1264 (strncmp(line, "======", 6) == 0) ||
1265 (strncmp(line, ">>>>>>", 6) == 0))
1266 Parse_Error(PARSE_FATAL,
1267 "Makefile appears to contain unresolved cvs/rcs/??? merge conflicts");
1268 else
1269 Parse_Error(PARSE_FATAL, lstart[0] == '.' ? "Unknown directive"
1270 : "Need an operator");
1271 goto out;
1272 }
1273
1274 /* Insert a null terminator. */
1275 savec = *cp;
1276 *cp = '\0';
1277
1278 /*
1279 * Got the word. See if it's a special target and if so set
1280 * specType to match it.
1281 */
1282 if (*line == '.' && isupper ((unsigned char)line[1])) {
1283 /*
1284 * See if the target is a special target that must have it
1285 * or its sources handled specially.
1286 */
1287 int keywd = ParseFindKeyword(line);
1288 if (keywd != -1) {
1289 if (specType == ExPath && parseKeywords[keywd].spec != ExPath) {
1290 Parse_Error(PARSE_FATAL, "Mismatched special targets");
1291 goto out;
1292 }
1293
1294 specType = parseKeywords[keywd].spec;
1295 tOp = parseKeywords[keywd].op;
1296
1297 /*
1298 * Certain special targets have special semantics:
1299 * .PATH Have to set the dirSearchPath
1300 * variable too
1301 * .MAIN Its sources are only used if
1302 * nothing has been specified to
1303 * create.
1304 * .DEFAULT Need to create a node to hang
1305 * commands on, but we don't want
1306 * it in the graph, nor do we want
1307 * it to be the Main Target, so we
1308 * create it, set OP_NOTMAIN and
1309 * add it to the list, setting
1310 * DEFAULT to the new node for
1311 * later use. We claim the node is
1312 * A transformation rule to make
1313 * life easier later, when we'll
1314 * use Make_HandleUse to actually
1315 * apply the .DEFAULT commands.
1316 * .PHONY The list of targets
1317 * .NOPATH Don't search for file in the path
1318 * .STALE
1319 * .BEGIN
1320 * .END
1321 * .ERROR
1322 * .INTERRUPT Are not to be considered the
1323 * main target.
1324 * .NOTPARALLEL Make only one target at a time.
1325 * .SINGLESHELL Create a shell for each command.
1326 * .ORDER Must set initial predecessor to NULL
1327 */
1328 switch (specType) {
1329 case ExPath:
1330 if (paths == NULL) {
1331 paths = Lst_Init(FALSE);
1332 }
1333 (void)Lst_AtEnd(paths, dirSearchPath);
1334 break;
1335 case Main:
1336 if (!Lst_IsEmpty(create)) {
1337 specType = Not;
1338 }
1339 break;
1340 case Begin:
1341 case End:
1342 case Stale:
1343 case dotError:
1344 case Interrupt:
1345 gn = Targ_FindNode(line, TARG_CREATE);
1346 if (doing_depend)
1347 ParseMark(gn);
1348 gn->type |= OP_NOTMAIN|OP_SPECIAL;
1349 (void)Lst_AtEnd(targets, gn);
1350 break;
1351 case Default:
1352 gn = Targ_NewGN(".DEFAULT");
1353 gn->type |= (OP_NOTMAIN|OP_TRANSFORM);
1354 (void)Lst_AtEnd(targets, gn);
1355 DEFAULT = gn;
1356 break;
1357 case NotParallel:
1358 maxJobs = 1;
1359 break;
1360 case SingleShell:
1361 compatMake = TRUE;
1362 break;
1363 case Order:
1364 predecessor = NULL;
1365 break;
1366 default:
1367 break;
1368 }
1369 } else if (strncmp(line, ".PATH", 5) == 0) {
1370 /*
1371 * .PATH<suffix> has to be handled specially.
1372 * Call on the suffix module to give us a path to
1373 * modify.
1374 */
1375 Lst path;
1376
1377 specType = ExPath;
1378 path = Suff_GetPath(&line[5]);
1379 if (path == NULL) {
1380 Parse_Error(PARSE_FATAL,
1381 "Suffix '%s' not defined (yet)",
1382 &line[5]);
1383 goto out;
1384 } else {
1385 if (paths == NULL) {
1386 paths = Lst_Init(FALSE);
1387 }
1388 (void)Lst_AtEnd(paths, path);
1389 }
1390 }
1391 }
1392
1393 /*
1394 * Have word in line. Get or create its node and stick it at
1395 * the end of the targets list
1396 */
1397 if ((specType == Not) && (*line != '\0')) {
1398 if (Dir_HasWildcards(line)) {
1399 /*
1400 * Targets are to be sought only in the current directory,
1401 * so create an empty path for the thing. Note we need to
1402 * use Dir_Destroy in the destruction of the path as the
1403 * Dir module could have added a directory to the path...
1404 */
1405 Lst emptyPath = Lst_Init(FALSE);
1406
1407 Dir_Expand(line, emptyPath, curTargs);
1408
1409 Lst_Destroy(emptyPath, Dir_Destroy);
1410 } else {
1411 /*
1412 * No wildcards, but we want to avoid code duplication,
1413 * so create a list with the word on it.
1414 */
1415 (void)Lst_AtEnd(curTargs, line);
1416 }
1417
1418 /* Apply the targets. */
1419
1420 while(!Lst_IsEmpty(curTargs)) {
1421 char *targName = (char *)Lst_DeQueue(curTargs);
1422
1423 if (!Suff_IsTransform (targName)) {
1424 gn = Targ_FindNode(targName, TARG_CREATE);
1425 } else {
1426 gn = Suff_AddTransform(targName);
1427 }
1428 if (doing_depend)
1429 ParseMark(gn);
1430
1431 (void)Lst_AtEnd(targets, gn);
1432 }
1433 } else if (specType == ExPath && *line != '.' && *line != '\0') {
1434 Parse_Error(PARSE_WARNING, "Extra target (%s) ignored", line);
1435 }
1436
1437 /* Don't need the inserted null terminator any more. */
1438 *cp = savec;
1439
1440 /*
1441 * If it is a special type and not .PATH, it's the only target we
1442 * allow on this line...
1443 */
1444 if (specType != Not && specType != ExPath) {
1445 Boolean warning = FALSE;
1446
1447 while (*cp && (ParseIsEscaped(lstart, cp) ||
1448 ((*cp != '!') && (*cp != ':')))) {
1449 if (ParseIsEscaped(lstart, cp) ||
1450 (*cp != ' ' && *cp != '\t')) {
1451 warning = TRUE;
1452 }
1453 cp++;
1454 }
1455 if (warning) {
1456 Parse_Error(PARSE_WARNING, "Extra target ignored");
1457 }
1458 } else {
1459 while (*cp && isspace ((unsigned char)*cp)) {
1460 cp++;
1461 }
1462 }
1463 line = cp;
1464 } while (*line && (ParseIsEscaped(lstart, line) ||
1465 ((*line != '!') && (*line != ':'))));
1466
1467 /*
1468 * Don't need the list of target names anymore...
1469 */
1470 Lst_Destroy(curTargs, NULL);
1471 curTargs = NULL;
1472
1473 if (!Lst_IsEmpty(targets)) {
1474 switch(specType) {
1475 default:
1476 Parse_Error(PARSE_WARNING, "Special and mundane targets don't mix. Mundane ones ignored");
1477 break;
1478 case Default:
1479 case Stale:
1480 case Begin:
1481 case End:
1482 case dotError:
1483 case Interrupt:
1484 /*
1485 * These four create nodes on which to hang commands, so
1486 * targets shouldn't be empty...
1487 */
1488 case Not:
1489 /*
1490 * Nothing special here -- targets can be empty if it wants.
1491 */
1492 break;
1493 }
1494 }
1495
1496 /*
1497 * Have now parsed all the target names. Must parse the operator next. The
1498 * result is left in op .
1499 */
1500 if (*cp == '!') {
1501 op = OP_FORCE;
1502 } else if (*cp == ':') {
1503 if (cp[1] == ':') {
1504 op = OP_DOUBLEDEP;
1505 cp++;
1506 } else {
1507 op = OP_DEPENDS;
1508 }
1509 } else {
1510 Parse_Error(PARSE_FATAL, lstart[0] == '.' ? "Unknown directive"
1511 : "Missing dependency operator");
1512 goto out;
1513 }
1514
1515 /* Advance beyond the operator */
1516 cp++;
1517
1518 /*
1519 * Apply the operator to the target. This is how we remember which
1520 * operator a target was defined with. It fails if the operator
1521 * used isn't consistent across all references.
1522 */
1523 Lst_ForEach(targets, ParseDoOp, &op);
1524
1525 /*
1526 * Onward to the sources.
1527 *
1528 * LINE will now point to the first source word, if any, or the
1529 * end of the string if not.
1530 */
1531 while (*cp && isspace ((unsigned char)*cp)) {
1532 cp++;
1533 }
1534 line = cp;
1535
1536 /*
1537 * Several special targets take different actions if present with no
1538 * sources:
1539 * a .SUFFIXES line with no sources clears out all old suffixes
1540 * a .PRECIOUS line makes all targets precious
1541 * a .IGNORE line ignores errors for all targets
1542 * a .SILENT line creates silence when making all targets
1543 * a .PATH removes all directories from the search path(s).
1544 */
1545 if (!*line) {
1546 switch (specType) {
1547 case Suffixes:
1548 Suff_ClearSuffixes();
1549 break;
1550 case Precious:
1551 allPrecious = TRUE;
1552 break;
1553 case Ignore:
1554 ignoreErrors = TRUE;
1555 break;
1556 case Silent:
1557 beSilent = TRUE;
1558 break;
1559 case ExPath:
1560 Lst_ForEach(paths, ParseClearPath, NULL);
1561 Dir_SetPATH();
1562 break;
1563 #ifdef POSIX
1564 case Posix:
1565 Var_Set("%POSIX", "1003.2", VAR_GLOBAL, 0);
1566 break;
1567 #endif
1568 default:
1569 break;
1570 }
1571 } else if (specType == MFlags) {
1572 /*
1573 * Call on functions in main.c to deal with these arguments and
1574 * set the initial character to a null-character so the loop to
1575 * get sources won't get anything
1576 */
1577 Main_ParseArgLine(line);
1578 *line = '\0';
1579 } else if (specType == ExShell) {
1580 if (Job_ParseShell(line) != SUCCESS) {
1581 Parse_Error(PARSE_FATAL, "improper shell specification");
1582 goto out;
1583 }
1584 *line = '\0';
1585 } else if ((specType == NotParallel) || (specType == SingleShell)) {
1586 *line = '\0';
1587 }
1588
1589 /*
1590 * NOW GO FOR THE SOURCES
1591 */
1592 if ((specType == Suffixes) || (specType == ExPath) ||
1593 (specType == Includes) || (specType == Libs) ||
1594 (specType == Null) || (specType == ExObjdir))
1595 {
1596 while (*line) {
1597 /*
1598 * If the target was one that doesn't take files as its sources
1599 * but takes something like suffixes, we take each
1600 * space-separated word on the line as a something and deal
1601 * with it accordingly.
1602 *
1603 * If the target was .SUFFIXES, we take each source as a
1604 * suffix and add it to the list of suffixes maintained by the
1605 * Suff module.
1606 *
1607 * If the target was a .PATH, we add the source as a directory
1608 * to search on the search path.
1609 *
1610 * If it was .INCLUDES, the source is taken to be the suffix of
1611 * files which will be #included and whose search path should
1612 * be present in the .INCLUDES variable.
1613 *
1614 * If it was .LIBS, the source is taken to be the suffix of
1615 * files which are considered libraries and whose search path
1616 * should be present in the .LIBS variable.
1617 *
1618 * If it was .NULL, the source is the suffix to use when a file
1619 * has no valid suffix.
1620 *
1621 * If it was .OBJDIR, the source is a new definition for .OBJDIR,
1622 * and will cause make to do a new chdir to that path.
1623 */
1624 while (*cp && !isspace ((unsigned char)*cp)) {
1625 cp++;
1626 }
1627 savec = *cp;
1628 *cp = '\0';
1629 switch (specType) {
1630 case Suffixes:
1631 Suff_AddSuffix(line, &mainNode);
1632 break;
1633 case ExPath:
1634 Lst_ForEach(paths, ParseAddDir, line);
1635 break;
1636 case Includes:
1637 Suff_AddInclude(line);
1638 break;
1639 case Libs:
1640 Suff_AddLib(line);
1641 break;
1642 case Null:
1643 Suff_SetNull(line);
1644 break;
1645 case ExObjdir:
1646 Main_SetObjdir(line);
1647 break;
1648 default:
1649 break;
1650 }
1651 *cp = savec;
1652 if (savec != '\0') {
1653 cp++;
1654 }
1655 while (*cp && isspace ((unsigned char)*cp)) {
1656 cp++;
1657 }
1658 line = cp;
1659 }
1660 if (paths) {
1661 Lst_Destroy(paths, NULL);
1662 }
1663 if (specType == ExPath)
1664 Dir_SetPATH();
1665 } else {
1666 while (*line) {
1667 /*
1668 * The targets take real sources, so we must beware of archive
1669 * specifications (i.e. things with left parentheses in them)
1670 * and handle them accordingly.
1671 */
1672 for (; *cp && !isspace ((unsigned char)*cp); cp++) {
1673 if ((*cp == LPAREN) && (cp > line) && (cp[-1] != '$')) {
1674 /*
1675 * Only stop for a left parenthesis if it isn't at the
1676 * start of a word (that'll be for variable changes
1677 * later) and isn't preceded by a dollar sign (a dynamic
1678 * source).
1679 */
1680 break;
1681 }
1682 }
1683
1684 if (*cp == LPAREN) {
1685 sources = Lst_Init(FALSE);
1686 if (Arch_ParseArchive(&line, sources, VAR_CMD) != SUCCESS) {
1687 Parse_Error(PARSE_FATAL,
1688 "Error in source archive spec \"%s\"", line);
1689 goto out;
1690 }
1691
1692 while (!Lst_IsEmpty (sources)) {
1693 gn = (GNode *)Lst_DeQueue(sources);
1694 ParseDoSrc(tOp, gn->name);
1695 }
1696 Lst_Destroy(sources, NULL);
1697 cp = line;
1698 } else {
1699 if (*cp) {
1700 *cp = '\0';
1701 cp += 1;
1702 }
1703
1704 ParseDoSrc(tOp, line);
1705 }
1706 while (*cp && isspace ((unsigned char)*cp)) {
1707 cp++;
1708 }
1709 line = cp;
1710 }
1711 }
1712
1713 if (mainNode == NULL) {
1714 /*
1715 * If we have yet to decide on a main target to make, in the
1716 * absence of any user input, we want the first target on
1717 * the first dependency line that is actually a real target
1718 * (i.e. isn't a .USE or .EXEC rule) to be made.
1719 */
1720 Lst_ForEach(targets, ParseFindMain, NULL);
1721 }
1722
1723 out:
1724 if (curTargs)
1725 Lst_Destroy(curTargs, NULL);
1726 }
1727
1728 /*-
1729 *---------------------------------------------------------------------
1730 * Parse_IsVar --
1731 * Return TRUE if the passed line is a variable assignment. A variable
1732 * assignment consists of a single word followed by optional whitespace
1733 * followed by either a += or an = operator.
1734 * This function is used both by the Parse_File function and main when
1735 * parsing the command-line arguments.
1736 *
1737 * Input:
1738 * line the line to check
1739 *
1740 * Results:
1741 * TRUE if it is. FALSE if it ain't
1742 *
1743 * Side Effects:
1744 * none
1745 *---------------------------------------------------------------------
1746 */
1747 Boolean
Parse_IsVar(char * line)1748 Parse_IsVar(char *line)
1749 {
1750 Boolean wasSpace = FALSE; /* set TRUE if found a space */
1751 char ch;
1752 int level = 0;
1753 #define ISEQOPERATOR(c) \
1754 (((c) == '+') || ((c) == ':') || ((c) == '?') || ((c) == '!'))
1755
1756 /*
1757 * Skip to variable name
1758 */
1759 for (;(*line == ' ') || (*line == '\t'); line++)
1760 continue;
1761
1762 /* Scan for one of the assignment operators outside a variable expansion */
1763 while ((ch = *line++) != 0) {
1764 if (ch == '(' || ch == '{') {
1765 level++;
1766 continue;
1767 }
1768 if (ch == ')' || ch == '}') {
1769 level--;
1770 continue;
1771 }
1772 if (level != 0)
1773 continue;
1774 while (ch == ' ' || ch == '\t') {
1775 ch = *line++;
1776 wasSpace = TRUE;
1777 }
1778 #ifdef SUNSHCMD
1779 if (ch == ':' && strncmp(line, "sh", 2) == 0) {
1780 line += 2;
1781 continue;
1782 }
1783 #endif
1784 if (ch == '=')
1785 return TRUE;
1786 if (*line == '=' && ISEQOPERATOR(ch))
1787 return TRUE;
1788 if (wasSpace)
1789 return FALSE;
1790 }
1791
1792 return FALSE;
1793 }
1794
1795 /*-
1796 *---------------------------------------------------------------------
1797 * Parse_DoVar --
1798 * Take the variable assignment in the passed line and do it in the
1799 * global context.
1800 *
1801 * Note: There is a lexical ambiguity with assignment modifier characters
1802 * in variable names. This routine interprets the character before the =
1803 * as a modifier. Therefore, an assignment like
1804 * C++=/usr/bin/CC
1805 * is interpreted as "C+ +=" instead of "C++ =".
1806 *
1807 * Input:
1808 * line a line guaranteed to be a variable assignment.
1809 * This reduces error checks
1810 * ctxt Context in which to do the assignment
1811 *
1812 * Results:
1813 * none
1814 *
1815 * Side Effects:
1816 * the variable structure of the given variable name is altered in the
1817 * global context.
1818 *---------------------------------------------------------------------
1819 */
1820 void
Parse_DoVar(char * line,GNode * ctxt)1821 Parse_DoVar(char *line, GNode *ctxt)
1822 {
1823 char *cp; /* pointer into line */
1824 enum {
1825 VAR_SUBST, VAR_APPEND, VAR_SHELL, VAR_NORMAL
1826 } type; /* Type of assignment */
1827 char *opc; /* ptr to operator character to
1828 * null-terminate the variable name */
1829 Boolean freeCp = FALSE; /* TRUE if cp needs to be freed,
1830 * i.e. if any variable expansion was
1831 * performed */
1832 int depth;
1833
1834 /*
1835 * Skip to variable name
1836 */
1837 while ((*line == ' ') || (*line == '\t')) {
1838 line++;
1839 }
1840
1841 /*
1842 * Skip to operator character, nulling out whitespace as we go
1843 * XXX Rather than counting () and {} we should look for $ and
1844 * then expand the variable.
1845 */
1846 for (depth = 0, cp = line + 1; depth != 0 || *cp != '='; cp++) {
1847 if (*cp == '(' || *cp == '{') {
1848 depth++;
1849 continue;
1850 }
1851 if (*cp == ')' || *cp == '}') {
1852 depth--;
1853 continue;
1854 }
1855 if (depth == 0 && isspace ((unsigned char)*cp)) {
1856 *cp = '\0';
1857 }
1858 }
1859 opc = cp-1; /* operator is the previous character */
1860 *cp++ = '\0'; /* nuke the = */
1861
1862 /*
1863 * Check operator type
1864 */
1865 switch (*opc) {
1866 case '+':
1867 type = VAR_APPEND;
1868 *opc = '\0';
1869 break;
1870
1871 case '?':
1872 /*
1873 * If the variable already has a value, we don't do anything.
1874 */
1875 *opc = '\0';
1876 if (Var_Exists(line, ctxt)) {
1877 return;
1878 } else {
1879 type = VAR_NORMAL;
1880 }
1881 break;
1882
1883 case ':':
1884 type = VAR_SUBST;
1885 *opc = '\0';
1886 break;
1887
1888 case '!':
1889 type = VAR_SHELL;
1890 *opc = '\0';
1891 break;
1892
1893 default:
1894 #ifdef SUNSHCMD
1895 while (opc > line && *opc != ':')
1896 opc--;
1897
1898 if (strncmp(opc, ":sh", 3) == 0) {
1899 type = VAR_SHELL;
1900 *opc = '\0';
1901 break;
1902 }
1903 #endif
1904 type = VAR_NORMAL;
1905 break;
1906 }
1907
1908 while (isspace ((unsigned char)*cp)) {
1909 cp++;
1910 }
1911
1912 if (type == VAR_APPEND) {
1913 Var_Append(line, cp, ctxt);
1914 } else if (type == VAR_SUBST) {
1915 /*
1916 * Allow variables in the old value to be undefined, but leave their
1917 * invocation alone -- this is done by forcing oldVars to be false.
1918 * XXX: This can cause recursive variables, but that's not hard to do,
1919 * and this allows someone to do something like
1920 *
1921 * CFLAGS = $(.INCLUDES)
1922 * CFLAGS := -I.. $(CFLAGS)
1923 *
1924 * And not get an error.
1925 */
1926 Boolean oldOldVars = oldVars;
1927
1928 oldVars = FALSE;
1929
1930 /*
1931 * make sure that we set the variable the first time to nothing
1932 * so that it gets substituted!
1933 */
1934 if (!Var_Exists(line, ctxt))
1935 Var_Set(line, "", ctxt, 0);
1936
1937 cp = Var_Subst(NULL, cp, ctxt, FALSE);
1938 oldVars = oldOldVars;
1939 freeCp = TRUE;
1940
1941 Var_Set(line, cp, ctxt, 0);
1942 } else if (type == VAR_SHELL) {
1943 char *res;
1944 const char *error;
1945
1946 if (strchr(cp, '$') != NULL) {
1947 /*
1948 * There's a dollar sign in the command, so perform variable
1949 * expansion on the whole thing. The resulting string will need
1950 * freeing when we're done, so set freeCmd to TRUE.
1951 */
1952 cp = Var_Subst(NULL, cp, VAR_CMD, TRUE);
1953 freeCp = TRUE;
1954 }
1955
1956 res = Cmd_Exec(cp, &error);
1957 Var_Set(line, res, ctxt, 0);
1958 free(res);
1959
1960 if (error)
1961 Parse_Error(PARSE_WARNING, error, cp);
1962 } else {
1963 /*
1964 * Normal assignment -- just do it.
1965 */
1966 Var_Set(line, cp, ctxt, 0);
1967 }
1968 if (strcmp(line, MAKEOVERRIDES) == 0)
1969 Main_ExportMAKEFLAGS(FALSE); /* re-export MAKEFLAGS */
1970 else if (strcmp(line, ".CURDIR") == 0) {
1971 /*
1972 * Somone is being (too?) clever...
1973 * Let's pretend they know what they are doing and
1974 * re-initialize the 'cur' Path.
1975 */
1976 Dir_InitCur(cp);
1977 Dir_SetPATH();
1978 } else if (strcmp(line, MAKE_JOB_PREFIX) == 0) {
1979 Job_SetPrefix();
1980 } else if (strcmp(line, MAKE_EXPORTED) == 0) {
1981 Var_Export(cp, 0);
1982 }
1983 if (freeCp)
1984 free(cp);
1985 }
1986
1987
1988 /*
1989 * ParseMaybeSubMake --
1990 * Scan the command string to see if it a possible submake node
1991 * Input:
1992 * cmd the command to scan
1993 * Results:
1994 * TRUE if the command is possibly a submake, FALSE if not.
1995 */
1996 static Boolean
ParseMaybeSubMake(const char * cmd)1997 ParseMaybeSubMake(const char *cmd)
1998 {
1999 size_t i;
2000 static struct {
2001 const char *name;
2002 size_t len;
2003 } vals[] = {
2004 #define MKV(A) { A, sizeof(A) - 1 }
2005 MKV("${MAKE}"),
2006 MKV("${.MAKE}"),
2007 MKV("$(MAKE)"),
2008 MKV("$(.MAKE)"),
2009 MKV("make"),
2010 };
2011 for (i = 0; i < sizeof(vals)/sizeof(vals[0]); i++) {
2012 char *ptr;
2013 if ((ptr = strstr(cmd, vals[i].name)) == NULL)
2014 continue;
2015 if ((ptr == cmd || !isalnum((unsigned char)ptr[-1]))
2016 && !isalnum((unsigned char)ptr[vals[i].len]))
2017 return TRUE;
2018 }
2019 return FALSE;
2020 }
2021
2022 /*-
2023 * ParseAddCmd --
2024 * Lst_ForEach function to add a command line to all targets
2025 *
2026 * Input:
2027 * gnp the node to which the command is to be added
2028 * cmd the command to add
2029 *
2030 * Results:
2031 * Always 0
2032 *
2033 * Side Effects:
2034 * A new element is added to the commands list of the node,
2035 * and the node can be marked as a submake node if the command is
2036 * determined to be that.
2037 */
2038 static int
ParseAddCmd(void * gnp,void * cmd)2039 ParseAddCmd(void *gnp, void *cmd)
2040 {
2041 GNode *gn = (GNode *)gnp;
2042
2043 /* Add to last (ie current) cohort for :: targets */
2044 if ((gn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (gn->cohorts))
2045 gn = (GNode *)Lst_Datum(Lst_Last(gn->cohorts));
2046
2047 /* if target already supplied, ignore commands */
2048 if (!(gn->type & OP_HAS_COMMANDS)) {
2049 (void)Lst_AtEnd(gn->commands, cmd);
2050 if (ParseMaybeSubMake(cmd))
2051 gn->type |= OP_SUBMAKE;
2052 ParseMark(gn);
2053 } else {
2054 #ifdef notyet
2055 /* XXX: We cannot do this until we fix the tree */
2056 (void)Lst_AtEnd(gn->commands, cmd);
2057 Parse_Error(PARSE_WARNING,
2058 "overriding commands for target \"%s\"; "
2059 "previous commands defined at %s: %d ignored",
2060 gn->name, gn->fname, gn->lineno);
2061 #else
2062 Parse_Error(PARSE_WARNING,
2063 "duplicate script for target \"%s\" ignored",
2064 gn->name);
2065 ParseErrorInternal(gn->fname, gn->lineno, PARSE_WARNING,
2066 "using previous script for \"%s\" defined here",
2067 gn->name);
2068 #endif
2069 }
2070 return(0);
2071 }
2072
2073 /*-
2074 *-----------------------------------------------------------------------
2075 * ParseHasCommands --
2076 * Callback procedure for Parse_File when destroying the list of
2077 * targets on the last dependency line. Marks a target as already
2078 * having commands if it does, to keep from having shell commands
2079 * on multiple dependency lines.
2080 *
2081 * Input:
2082 * gnp Node to examine
2083 *
2084 * Results:
2085 * None
2086 *
2087 * Side Effects:
2088 * OP_HAS_COMMANDS may be set for the target.
2089 *
2090 *-----------------------------------------------------------------------
2091 */
2092 static void
ParseHasCommands(void * gnp)2093 ParseHasCommands(void *gnp)
2094 {
2095 GNode *gn = (GNode *)gnp;
2096 if (!Lst_IsEmpty(gn->commands)) {
2097 gn->type |= OP_HAS_COMMANDS;
2098 }
2099 }
2100
2101 /*-
2102 *-----------------------------------------------------------------------
2103 * Parse_AddIncludeDir --
2104 * Add a directory to the path searched for included makefiles
2105 * bracketed by double-quotes. Used by functions in main.c
2106 *
2107 * Input:
2108 * dir The name of the directory to add
2109 *
2110 * Results:
2111 * None.
2112 *
2113 * Side Effects:
2114 * The directory is appended to the list.
2115 *
2116 *-----------------------------------------------------------------------
2117 */
2118 void
Parse_AddIncludeDir(char * dir)2119 Parse_AddIncludeDir(char *dir)
2120 {
2121 (void)Dir_AddDir(parseIncPath, dir);
2122 }
2123
2124 /*-
2125 *---------------------------------------------------------------------
2126 * ParseDoInclude --
2127 * Push to another file.
2128 *
2129 * The input is the line minus the `.'. A file spec is a string
2130 * enclosed in <> or "". The former is looked for only in sysIncPath.
2131 * The latter in . and the directories specified by -I command line
2132 * options
2133 *
2134 * Results:
2135 * None
2136 *
2137 * Side Effects:
2138 * A structure is added to the includes Lst and readProc, lineno,
2139 * fname and curFILE are altered for the new file
2140 *---------------------------------------------------------------------
2141 */
2142
2143 static void
Parse_include_file(char * file,Boolean isSystem,int silent)2144 Parse_include_file(char *file, Boolean isSystem, int silent)
2145 {
2146 struct loadedfile *lf;
2147 char *fullname; /* full pathname of file */
2148 char *newName;
2149 char *prefEnd, *incdir;
2150 int fd;
2151 int i;
2152
2153 /*
2154 * Now we know the file's name and its search path, we attempt to
2155 * find the durn thing. A return of NULL indicates the file don't
2156 * exist.
2157 */
2158 fullname = file[0] == '/' ? bmake_strdup(file) : NULL;
2159
2160 if (fullname == NULL && !isSystem) {
2161 /*
2162 * Include files contained in double-quotes are first searched for
2163 * relative to the including file's location. We don't want to
2164 * cd there, of course, so we just tack on the old file's
2165 * leading path components and call Dir_FindFile to see if
2166 * we can locate the beast.
2167 */
2168
2169 incdir = bmake_strdup(curFile->fname);
2170 prefEnd = strrchr(incdir, '/');
2171 if (prefEnd != NULL) {
2172 *prefEnd = '\0';
2173 /* Now do lexical processing of leading "../" on the filename */
2174 for (i = 0; strncmp(file + i, "../", 3) == 0; i += 3) {
2175 prefEnd = strrchr(incdir + 1, '/');
2176 if (prefEnd == NULL || strcmp(prefEnd, "/..") == 0)
2177 break;
2178 *prefEnd = '\0';
2179 }
2180 newName = str_concat(incdir, file + i, STR_ADDSLASH);
2181 fullname = Dir_FindFile(newName, parseIncPath);
2182 if (fullname == NULL)
2183 fullname = Dir_FindFile(newName, dirSearchPath);
2184 free(newName);
2185 }
2186 free(incdir);
2187
2188 if (fullname == NULL) {
2189 /*
2190 * Makefile wasn't found in same directory as included makefile.
2191 * Search for it first on the -I search path,
2192 * then on the .PATH search path, if not found in a -I directory.
2193 * If we have a suffix specific path we should use that.
2194 */
2195 char *suff;
2196 Lst suffPath = NULL;
2197
2198 if ((suff = strrchr(file, '.'))) {
2199 suffPath = Suff_GetPath(suff);
2200 if (suffPath != NULL) {
2201 fullname = Dir_FindFile(file, suffPath);
2202 }
2203 }
2204 if (fullname == NULL) {
2205 fullname = Dir_FindFile(file, parseIncPath);
2206 if (fullname == NULL) {
2207 fullname = Dir_FindFile(file, dirSearchPath);
2208 }
2209 }
2210 }
2211 }
2212
2213 /* Looking for a system file or file still not found */
2214 if (fullname == NULL) {
2215 /*
2216 * Look for it on the system path
2217 */
2218 fullname = Dir_FindFile(file,
2219 Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath);
2220 }
2221
2222 if (fullname == NULL) {
2223 if (!silent)
2224 Parse_Error(PARSE_FATAL, "Could not find %s", file);
2225 return;
2226 }
2227
2228 /* Actually open the file... */
2229 fd = open(fullname, O_RDONLY);
2230 if (fd == -1) {
2231 if (!silent)
2232 Parse_Error(PARSE_FATAL, "Cannot open %s", fullname);
2233 free(fullname);
2234 return;
2235 }
2236
2237 /* load it */
2238 lf = loadfile(fullname, fd);
2239
2240 ParseSetIncludedFile();
2241 /* Start reading from this file next */
2242 Parse_SetInput(fullname, 0, -1, loadedfile_nextbuf, lf);
2243 curFile->lf = lf;
2244 }
2245
2246 static void
ParseDoInclude(char * line)2247 ParseDoInclude(char *line)
2248 {
2249 char endc; /* the character which ends the file spec */
2250 char *cp; /* current position in file spec */
2251 int silent = (*line != 'i') ? 1 : 0;
2252 char *file = &line[7 + silent];
2253
2254 /* Skip to delimiter character so we know where to look */
2255 while (*file == ' ' || *file == '\t')
2256 file++;
2257
2258 if (*file != '"' && *file != '<') {
2259 Parse_Error(PARSE_FATAL,
2260 ".include filename must be delimited by '\"' or '<'");
2261 return;
2262 }
2263
2264 /*
2265 * Set the search path on which to find the include file based on the
2266 * characters which bracket its name. Angle-brackets imply it's
2267 * a system Makefile while double-quotes imply it's a user makefile
2268 */
2269 if (*file == '<') {
2270 endc = '>';
2271 } else {
2272 endc = '"';
2273 }
2274
2275 /* Skip to matching delimiter */
2276 for (cp = ++file; *cp && *cp != endc; cp++)
2277 continue;
2278
2279 if (*cp != endc) {
2280 Parse_Error(PARSE_FATAL,
2281 "Unclosed %cinclude filename. '%c' expected",
2282 '.', endc);
2283 return;
2284 }
2285 *cp = '\0';
2286
2287 /*
2288 * Substitute for any variables in the file name before trying to
2289 * find the thing.
2290 */
2291 file = Var_Subst(NULL, file, VAR_CMD, FALSE);
2292
2293 Parse_include_file(file, endc == '>', silent);
2294 free(file);
2295 }
2296
2297
2298 /*-
2299 *---------------------------------------------------------------------
2300 * ParseSetIncludedFile --
2301 * Set the .INCLUDEDFROMFILE variable to the contents of .PARSEFILE
2302 * and the .INCLUDEDFROMDIR variable to the contents of .PARSEDIR
2303 *
2304 * Results:
2305 * None
2306 *
2307 * Side Effects:
2308 * The .INCLUDEDFROMFILE variable is overwritten by the contents
2309 * of .PARSEFILE and the .INCLUDEDFROMDIR variable is overwriten
2310 * by the contents of .PARSEDIR
2311 *---------------------------------------------------------------------
2312 */
2313 static void
ParseSetIncludedFile(void)2314 ParseSetIncludedFile(void)
2315 {
2316 char *pf, *fp = NULL;
2317 char *pd, *dp = NULL;
2318
2319 pf = Var_Value(".PARSEFILE", VAR_GLOBAL, &fp);
2320 Var_Set(".INCLUDEDFROMFILE", pf, VAR_GLOBAL, 0);
2321 pd = Var_Value(".PARSEDIR", VAR_GLOBAL, &dp);
2322 Var_Set(".INCLUDEDFROMDIR", pd, VAR_GLOBAL, 0);
2323
2324 if (DEBUG(PARSE))
2325 fprintf(debug_file, "%s: ${.INCLUDEDFROMDIR} = `%s' "
2326 "${.INCLUDEDFROMFILE} = `%s'\n", __func__, pd, pf);
2327
2328 if (fp)
2329 free(fp);
2330 if (dp)
2331 free(dp);
2332 }
2333 /*-
2334 *---------------------------------------------------------------------
2335 * ParseSetParseFile --
2336 * Set the .PARSEDIR and .PARSEFILE variables to the dirname and
2337 * basename of the given filename
2338 *
2339 * Results:
2340 * None
2341 *
2342 * Side Effects:
2343 * The .PARSEDIR and .PARSEFILE variables are overwritten by the
2344 * dirname and basename of the given filename.
2345 *---------------------------------------------------------------------
2346 */
2347 static void
ParseSetParseFile(const char * filename)2348 ParseSetParseFile(const char *filename)
2349 {
2350 char *slash, *dirname;
2351 const char *pd, *pf;
2352 int len;
2353
2354 slash = strrchr(filename, '/');
2355 if (slash == NULL) {
2356 Var_Set(".PARSEDIR", pd = curdir, VAR_GLOBAL, 0);
2357 Var_Set(".PARSEFILE", pf = filename, VAR_GLOBAL, 0);
2358 dirname= NULL;
2359 } else {
2360 len = slash - filename;
2361 dirname = bmake_malloc(len + 1);
2362 memcpy(dirname, filename, len);
2363 dirname[len] = '\0';
2364 Var_Set(".PARSEDIR", pd = dirname, VAR_GLOBAL, 0);
2365 Var_Set(".PARSEFILE", pf = slash + 1, VAR_GLOBAL, 0);
2366 }
2367 if (DEBUG(PARSE))
2368 fprintf(debug_file, "%s: ${.PARSEDIR} = `%s' ${.PARSEFILE} = `%s'\n",
2369 __func__, pd, pf);
2370 free(dirname);
2371 }
2372
2373 /*
2374 * Track the makefiles we read - so makefiles can
2375 * set dependencies on them.
2376 * Avoid adding anything more than once.
2377 */
2378
2379 static void
ParseTrackInput(const char * name)2380 ParseTrackInput(const char *name)
2381 {
2382 char *old;
2383 char *fp = NULL;
2384 size_t name_len = strlen(name);
2385
2386 old = Var_Value(MAKE_MAKEFILES, VAR_GLOBAL, &fp);
2387 if (old) {
2388 /* does it contain name? */
2389 for (; old != NULL; old = strchr(old, ' ')) {
2390 if (*old == ' ')
2391 old++;
2392 if (memcmp(old, name, name_len) == 0
2393 && (old[name_len] == 0 || old[name_len] == ' '))
2394 goto cleanup;
2395 }
2396 }
2397 Var_Append (MAKE_MAKEFILES, name, VAR_GLOBAL);
2398 cleanup:
2399 if (fp) {
2400 free(fp);
2401 }
2402 }
2403
2404
2405 /*-
2406 *---------------------------------------------------------------------
2407 * Parse_setInput --
2408 * Start Parsing from the given source
2409 *
2410 * Results:
2411 * None
2412 *
2413 * Side Effects:
2414 * A structure is added to the includes Lst and readProc, lineno,
2415 * fname and curFile are altered for the new file
2416 *---------------------------------------------------------------------
2417 */
2418 void
Parse_SetInput(const char * name,int line,int fd,char * (* nextbuf)(void *,size_t *),void * arg)2419 Parse_SetInput(const char *name, int line, int fd,
2420 char *(*nextbuf)(void *, size_t *), void *arg)
2421 {
2422 char *buf;
2423 size_t len;
2424
2425 if (name == NULL)
2426 name = curFile->fname;
2427 else
2428 ParseTrackInput(name);
2429
2430 if (DEBUG(PARSE))
2431 fprintf(debug_file, "%s: file %s, line %d, fd %d, nextbuf %p, arg %p\n",
2432 __func__, name, line, fd, nextbuf, arg);
2433
2434 if (fd == -1 && nextbuf == NULL)
2435 /* sanity */
2436 return;
2437
2438 if (curFile != NULL)
2439 /* Save exiting file info */
2440 Lst_AtFront(includes, curFile);
2441
2442 /* Allocate and fill in new structure */
2443 curFile = bmake_malloc(sizeof *curFile);
2444
2445 /*
2446 * Once the previous state has been saved, we can get down to reading
2447 * the new file. We set up the name of the file to be the absolute
2448 * name of the include file so error messages refer to the right
2449 * place.
2450 */
2451 curFile->fname = bmake_strdup(name);
2452 curFile->lineno = line;
2453 curFile->first_lineno = line;
2454 curFile->nextbuf = nextbuf;
2455 curFile->nextbuf_arg = arg;
2456 curFile->lf = NULL;
2457
2458 assert(nextbuf != NULL);
2459
2460 /* Get first block of input data */
2461 buf = curFile->nextbuf(curFile->nextbuf_arg, &len);
2462 if (buf == NULL) {
2463 /* Was all a waste of time ... */
2464 if (curFile->fname)
2465 free(curFile->fname);
2466 free(curFile);
2467 return;
2468 }
2469 curFile->P_str = buf;
2470 curFile->P_ptr = buf;
2471 curFile->P_end = buf+len;
2472
2473 curFile->cond_depth = Cond_save_depth();
2474 ParseSetParseFile(name);
2475 }
2476
2477 #ifdef SYSVINCLUDE
2478 /*-
2479 *---------------------------------------------------------------------
2480 * ParseTraditionalInclude --
2481 * Push to another file.
2482 *
2483 * The input is the current line. The file name(s) are
2484 * following the "include".
2485 *
2486 * Results:
2487 * None
2488 *
2489 * Side Effects:
2490 * A structure is added to the includes Lst and readProc, lineno,
2491 * fname and curFILE are altered for the new file
2492 *---------------------------------------------------------------------
2493 */
2494 static void
ParseTraditionalInclude(char * line)2495 ParseTraditionalInclude(char *line)
2496 {
2497 char *cp; /* current position in file spec */
2498 int done = 0;
2499 int silent = (line[0] != 'i') ? 1 : 0;
2500 char *file = &line[silent + 7];
2501 char *all_files;
2502
2503 if (DEBUG(PARSE)) {
2504 fprintf(debug_file, "%s: %s\n", __func__, file);
2505 }
2506
2507 /*
2508 * Skip over whitespace
2509 */
2510 while (isspace((unsigned char)*file))
2511 file++;
2512
2513 /*
2514 * Substitute for any variables in the file name before trying to
2515 * find the thing.
2516 */
2517 all_files = Var_Subst(NULL, file, VAR_CMD, FALSE);
2518
2519 if (*file == '\0') {
2520 Parse_Error(PARSE_FATAL,
2521 "Filename missing from \"include\"");
2522 return;
2523 }
2524
2525 for (file = all_files; !done; file = cp + 1) {
2526 /* Skip to end of line or next whitespace */
2527 for (cp = file; *cp && !isspace((unsigned char) *cp); cp++)
2528 continue;
2529
2530 if (*cp)
2531 *cp = '\0';
2532 else
2533 done = 1;
2534
2535 Parse_include_file(file, FALSE, silent);
2536 }
2537 free(all_files);
2538 }
2539 #endif
2540
2541 #ifdef GMAKEEXPORT
2542 /*-
2543 *---------------------------------------------------------------------
2544 * ParseGmakeExport --
2545 * Parse export <variable>=<value>
2546 *
2547 * And set the environment with it.
2548 *
2549 * Results:
2550 * None
2551 *
2552 * Side Effects:
2553 * None
2554 *---------------------------------------------------------------------
2555 */
2556 static void
ParseGmakeExport(char * line)2557 ParseGmakeExport(char *line)
2558 {
2559 char *variable = &line[6];
2560 char *value;
2561
2562 if (DEBUG(PARSE)) {
2563 fprintf(debug_file, "%s: %s\n", __func__, variable);
2564 }
2565
2566 /*
2567 * Skip over whitespace
2568 */
2569 while (isspace((unsigned char)*variable))
2570 variable++;
2571
2572 for (value = variable; *value && *value != '='; value++)
2573 continue;
2574
2575 if (*value != '=') {
2576 Parse_Error(PARSE_FATAL,
2577 "Variable/Value missing from \"export\"");
2578 return;
2579 }
2580 *value++ = '\0'; /* terminate variable */
2581
2582 /*
2583 * Expand the value before putting it in the environment.
2584 */
2585 value = Var_Subst(NULL, value, VAR_CMD, FALSE);
2586 setenv(variable, value, 1);
2587 }
2588 #endif
2589
2590 /*-
2591 *---------------------------------------------------------------------
2592 * ParseEOF --
2593 * Called when EOF is reached in the current file. If we were reading
2594 * an include file, the includes stack is popped and things set up
2595 * to go back to reading the previous file at the previous location.
2596 *
2597 * Results:
2598 * CONTINUE if there's more to do. DONE if not.
2599 *
2600 * Side Effects:
2601 * The old curFILE, is closed. The includes list is shortened.
2602 * lineno, curFILE, and fname are changed if CONTINUE is returned.
2603 *---------------------------------------------------------------------
2604 */
2605 static int
ParseEOF(void)2606 ParseEOF(void)
2607 {
2608 char *ptr;
2609 size_t len;
2610
2611 assert(curFile->nextbuf != NULL);
2612
2613 /* get next input buffer, if any */
2614 ptr = curFile->nextbuf(curFile->nextbuf_arg, &len);
2615 curFile->P_ptr = ptr;
2616 curFile->P_str = ptr;
2617 curFile->P_end = ptr + len;
2618 curFile->lineno = curFile->first_lineno;
2619 if (ptr != NULL) {
2620 /* Iterate again */
2621 return CONTINUE;
2622 }
2623
2624 /* Ensure the makefile (or loop) didn't have mismatched conditionals */
2625 Cond_restore_depth(curFile->cond_depth);
2626
2627 if (curFile->lf != NULL) {
2628 loadedfile_destroy(curFile->lf);
2629 curFile->lf = NULL;
2630 }
2631
2632 /* Dispose of curFile info */
2633 /* Leak curFile->fname because all the gnodes have pointers to it */
2634 free(curFile->P_str);
2635 free(curFile);
2636
2637 curFile = Lst_DeQueue(includes);
2638
2639 if (curFile == NULL) {
2640 /* We've run out of input */
2641 Var_Delete(".PARSEDIR", VAR_GLOBAL);
2642 Var_Delete(".PARSEFILE", VAR_GLOBAL);
2643 Var_Delete(".INCLUDEDFROMDIR", VAR_GLOBAL);
2644 Var_Delete(".INCLUDEDFROMFILE", VAR_GLOBAL);
2645 return DONE;
2646 }
2647
2648 if (DEBUG(PARSE))
2649 fprintf(debug_file, "ParseEOF: returning to file %s, line %d\n",
2650 curFile->fname, curFile->lineno);
2651
2652 /* Restore the PARSEDIR/PARSEFILE variables */
2653 ParseSetParseFile(curFile->fname);
2654 return (CONTINUE);
2655 }
2656
2657 #define PARSE_RAW 1
2658 #define PARSE_SKIP 2
2659
2660 static char *
ParseGetLine(int flags,int * length)2661 ParseGetLine(int flags, int *length)
2662 {
2663 IFile *cf = curFile;
2664 char *ptr;
2665 char ch;
2666 char *line;
2667 char *line_end;
2668 char *escaped;
2669 char *comment;
2670 char *tp;
2671
2672 /* Loop through blank lines and comment lines */
2673 for (;;) {
2674 cf->lineno++;
2675 line = cf->P_ptr;
2676 ptr = line;
2677 line_end = line;
2678 escaped = NULL;
2679 comment = NULL;
2680 for (;;) {
2681 if (cf->P_end != NULL && ptr == cf->P_end) {
2682 /* end of buffer */
2683 ch = 0;
2684 break;
2685 }
2686 ch = *ptr;
2687 if (ch == 0 || (ch == '\\' && ptr[1] == 0)) {
2688 if (cf->P_end == NULL)
2689 /* End of string (aka for loop) data */
2690 break;
2691 /* see if there is more we can parse */
2692 while (ptr++ < cf->P_end) {
2693 if ((ch = *ptr) == '\n') {
2694 if (ptr > line && ptr[-1] == '\\')
2695 continue;
2696 Parse_Error(PARSE_WARNING,
2697 "Zero byte read from file, skipping rest of line.");
2698 break;
2699 }
2700 }
2701 if (cf->nextbuf != NULL) {
2702 /*
2703 * End of this buffer; return EOF and outer logic
2704 * will get the next one. (eww)
2705 */
2706 break;
2707 }
2708 Parse_Error(PARSE_FATAL, "Zero byte read from file");
2709 return NULL;
2710 }
2711
2712 if (ch == '\\') {
2713 /* Don't treat next character as special, remember first one */
2714 if (escaped == NULL)
2715 escaped = ptr;
2716 if (ptr[1] == '\n')
2717 cf->lineno++;
2718 ptr += 2;
2719 line_end = ptr;
2720 continue;
2721 }
2722 if (ch == '#' && comment == NULL) {
2723 /* Remember first '#' for comment stripping */
2724 /* Unless previous char was '[', as in modifier :[#] */
2725 if (!(ptr > line && ptr[-1] == '['))
2726 comment = line_end;
2727 }
2728 ptr++;
2729 if (ch == '\n')
2730 break;
2731 if (!isspace((unsigned char)ch))
2732 /* We are not interested in trailing whitespace */
2733 line_end = ptr;
2734 }
2735
2736 /* Save next 'to be processed' location */
2737 cf->P_ptr = ptr;
2738
2739 /* Check we have a non-comment, non-blank line */
2740 if (line_end == line || comment == line) {
2741 if (ch == 0)
2742 /* At end of file */
2743 return NULL;
2744 /* Parse another line */
2745 continue;
2746 }
2747
2748 /* We now have a line of data */
2749 *line_end = 0;
2750
2751 if (flags & PARSE_RAW) {
2752 /* Leave '\' (etc) in line buffer (eg 'for' lines) */
2753 *length = line_end - line;
2754 return line;
2755 }
2756
2757 if (flags & PARSE_SKIP) {
2758 /* Completely ignore non-directives */
2759 if (line[0] != '.')
2760 continue;
2761 /* We could do more of the .else/.elif/.endif checks here */
2762 }
2763 break;
2764 }
2765
2766 /* Brutally ignore anything after a non-escaped '#' in non-commands */
2767 if (comment != NULL && line[0] != '\t') {
2768 line_end = comment;
2769 *line_end = 0;
2770 }
2771
2772 /* If we didn't see a '\\' then the in-situ data is fine */
2773 if (escaped == NULL) {
2774 *length = line_end - line;
2775 return line;
2776 }
2777
2778 /* Remove escapes from '\n' and '#' */
2779 tp = ptr = escaped;
2780 escaped = line;
2781 for (; ; *tp++ = ch) {
2782 ch = *ptr++;
2783 if (ch != '\\') {
2784 if (ch == 0)
2785 break;
2786 continue;
2787 }
2788
2789 ch = *ptr++;
2790 if (ch == 0) {
2791 /* Delete '\\' at end of buffer */
2792 tp--;
2793 break;
2794 }
2795
2796 if (ch == '#' && line[0] != '\t')
2797 /* Delete '\\' from before '#' on non-command lines */
2798 continue;
2799
2800 if (ch != '\n') {
2801 /* Leave '\\' in buffer for later */
2802 *tp++ = '\\';
2803 /* Make sure we don't delete an escaped ' ' from the line end */
2804 escaped = tp + 1;
2805 continue;
2806 }
2807
2808 /* Escaped '\n' replace following whitespace with a single ' ' */
2809 while (ptr[0] == ' ' || ptr[0] == '\t')
2810 ptr++;
2811 ch = ' ';
2812 }
2813
2814 /* Delete any trailing spaces - eg from empty continuations */
2815 while (tp > escaped && isspace((unsigned char)tp[-1]))
2816 tp--;
2817
2818 *tp = 0;
2819 *length = tp - line;
2820 return line;
2821 }
2822
2823 /*-
2824 *---------------------------------------------------------------------
2825 * ParseReadLine --
2826 * Read an entire line from the input file. Called only by Parse_File.
2827 *
2828 * Results:
2829 * A line w/o its newline
2830 *
2831 * Side Effects:
2832 * Only those associated with reading a character
2833 *---------------------------------------------------------------------
2834 */
2835 static char *
ParseReadLine(void)2836 ParseReadLine(void)
2837 {
2838 char *line; /* Result */
2839 int lineLength; /* Length of result */
2840 int lineno; /* Saved line # */
2841 int rval;
2842
2843 for (;;) {
2844 line = ParseGetLine(0, &lineLength);
2845 if (line == NULL)
2846 return NULL;
2847
2848 if (line[0] != '.')
2849 return line;
2850
2851 /*
2852 * The line might be a conditional. Ask the conditional module
2853 * about it and act accordingly
2854 */
2855 switch (Cond_Eval(line)) {
2856 case COND_SKIP:
2857 /* Skip to next conditional that evaluates to COND_PARSE. */
2858 do {
2859 line = ParseGetLine(PARSE_SKIP, &lineLength);
2860 } while (line && Cond_Eval(line) != COND_PARSE);
2861 if (line == NULL)
2862 break;
2863 continue;
2864 case COND_PARSE:
2865 continue;
2866 case COND_INVALID: /* Not a conditional line */
2867 /* Check for .for loops */
2868 rval = For_Eval(line);
2869 if (rval == 0)
2870 /* Not a .for line */
2871 break;
2872 if (rval < 0)
2873 /* Syntax error - error printed, ignore line */
2874 continue;
2875 /* Start of a .for loop */
2876 lineno = curFile->lineno;
2877 /* Accumulate loop lines until matching .endfor */
2878 do {
2879 line = ParseGetLine(PARSE_RAW, &lineLength);
2880 if (line == NULL) {
2881 Parse_Error(PARSE_FATAL,
2882 "Unexpected end of file in for loop.");
2883 break;
2884 }
2885 } while (For_Accum(line));
2886 /* Stash each iteration as a new 'input file' */
2887 For_Run(lineno);
2888 /* Read next line from for-loop buffer */
2889 continue;
2890 }
2891 return (line);
2892 }
2893 }
2894
2895 /*-
2896 *-----------------------------------------------------------------------
2897 * ParseFinishLine --
2898 * Handle the end of a dependency group.
2899 *
2900 * Results:
2901 * Nothing.
2902 *
2903 * Side Effects:
2904 * inLine set FALSE. 'targets' list destroyed.
2905 *
2906 *-----------------------------------------------------------------------
2907 */
2908 static void
ParseFinishLine(void)2909 ParseFinishLine(void)
2910 {
2911 if (inLine) {
2912 Lst_ForEach(targets, Suff_EndTransform, NULL);
2913 Lst_Destroy(targets, ParseHasCommands);
2914 targets = NULL;
2915 inLine = FALSE;
2916 }
2917 }
2918
2919
2920 /*-
2921 *---------------------------------------------------------------------
2922 * Parse_File --
2923 * Parse a file into its component parts, incorporating it into the
2924 * current dependency graph. This is the main function and controls
2925 * almost every other function in this module
2926 *
2927 * Input:
2928 * name the name of the file being read
2929 * fd Open file to makefile to parse
2930 *
2931 * Results:
2932 * None
2933 *
2934 * Side Effects:
2935 * closes fd.
2936 * Loads. Nodes are added to the list of all targets, nodes and links
2937 * are added to the dependency graph. etc. etc. etc.
2938 *---------------------------------------------------------------------
2939 */
2940 void
Parse_File(const char * name,int fd)2941 Parse_File(const char *name, int fd)
2942 {
2943 char *cp; /* pointer into the line */
2944 char *line; /* the line we're working on */
2945 struct loadedfile *lf;
2946
2947 lf = loadfile(name, fd);
2948
2949 inLine = FALSE;
2950 fatals = 0;
2951
2952 if (name == NULL) {
2953 name = "(stdin)";
2954 }
2955
2956 Parse_SetInput(name, 0, -1, loadedfile_nextbuf, lf);
2957 curFile->lf = lf;
2958
2959 do {
2960 for (; (line = ParseReadLine()) != NULL; ) {
2961 if (DEBUG(PARSE))
2962 fprintf(debug_file, "ParseReadLine (%d): '%s'\n",
2963 curFile->lineno, line);
2964 if (*line == '.') {
2965 /*
2966 * Lines that begin with the special character may be
2967 * include or undef directives.
2968 * On the other hand they can be suffix rules (.c.o: ...)
2969 * or just dependencies for filenames that start '.'.
2970 */
2971 for (cp = line + 1; isspace((unsigned char)*cp); cp++) {
2972 continue;
2973 }
2974 if (strncmp(cp, "include", 7) == 0 ||
2975 ((cp[0] == 's' || cp[0] == '-') &&
2976 strncmp(&cp[1], "include", 7) == 0)) {
2977 ParseDoInclude(cp);
2978 continue;
2979 }
2980 if (strncmp(cp, "undef", 5) == 0) {
2981 char *cp2;
2982 for (cp += 5; isspace((unsigned char) *cp); cp++)
2983 continue;
2984 for (cp2 = cp; !isspace((unsigned char) *cp2) &&
2985 (*cp2 != '\0'); cp2++)
2986 continue;
2987 *cp2 = '\0';
2988 Var_Delete(cp, VAR_GLOBAL);
2989 continue;
2990 } else if (strncmp(cp, "export", 6) == 0) {
2991 for (cp += 6; isspace((unsigned char) *cp); cp++)
2992 continue;
2993 Var_Export(cp, 1);
2994 continue;
2995 } else if (strncmp(cp, "unexport", 8) == 0) {
2996 Var_UnExport(cp);
2997 continue;
2998 } else if (strncmp(cp, "info", 4) == 0 ||
2999 strncmp(cp, "error", 5) == 0 ||
3000 strncmp(cp, "warning", 7) == 0) {
3001 if (ParseMessage(cp))
3002 continue;
3003 }
3004 }
3005
3006 if (*line == '\t') {
3007 /*
3008 * If a line starts with a tab, it can only hope to be
3009 * a creation command.
3010 */
3011 cp = line + 1;
3012 shellCommand:
3013 for (; isspace ((unsigned char)*cp); cp++) {
3014 continue;
3015 }
3016 if (*cp) {
3017 if (!inLine)
3018 Parse_Error(PARSE_FATAL,
3019 "Unassociated shell command \"%s\"",
3020 cp);
3021 /*
3022 * So long as it's not a blank line and we're actually
3023 * in a dependency spec, add the command to the list of
3024 * commands of all targets in the dependency spec
3025 */
3026 if (targets) {
3027 cp = bmake_strdup(cp);
3028 Lst_ForEach(targets, ParseAddCmd, cp);
3029 #ifdef CLEANUP
3030 Lst_AtEnd(targCmds, cp);
3031 #endif
3032 }
3033 }
3034 continue;
3035 }
3036
3037 #ifdef SYSVINCLUDE
3038 if (((strncmp(line, "include", 7) == 0 &&
3039 isspace((unsigned char) line[7])) ||
3040 ((line[0] == 's' || line[0] == '-') &&
3041 strncmp(&line[1], "include", 7) == 0 &&
3042 isspace((unsigned char) line[8]))) &&
3043 strchr(line, ':') == NULL) {
3044 /*
3045 * It's an S3/S5-style "include".
3046 */
3047 ParseTraditionalInclude(line);
3048 continue;
3049 }
3050 #endif
3051 #ifdef GMAKEEXPORT
3052 if (strncmp(line, "export", 6) == 0 &&
3053 isspace((unsigned char) line[6]) &&
3054 strchr(line, ':') == NULL) {
3055 /*
3056 * It's a Gmake "export".
3057 */
3058 ParseGmakeExport(line);
3059 continue;
3060 }
3061 #endif
3062 if (Parse_IsVar(line)) {
3063 ParseFinishLine();
3064 Parse_DoVar(line, VAR_GLOBAL);
3065 continue;
3066 }
3067
3068 #ifndef POSIX
3069 /*
3070 * To make life easier on novices, if the line is indented we
3071 * first make sure the line has a dependency operator in it.
3072 * If it doesn't have an operator and we're in a dependency
3073 * line's script, we assume it's actually a shell command
3074 * and add it to the current list of targets.
3075 */
3076 cp = line;
3077 if (isspace((unsigned char) line[0])) {
3078 while ((*cp != '\0') && isspace((unsigned char) *cp))
3079 cp++;
3080 while (*cp && (ParseIsEscaped(line, cp) ||
3081 (*cp != ':') && (*cp != '!'))) {
3082 cp++;
3083 }
3084 if (*cp == '\0') {
3085 if (inLine) {
3086 Parse_Error(PARSE_WARNING,
3087 "Shell command needs a leading tab");
3088 goto shellCommand;
3089 }
3090 }
3091 }
3092 #endif
3093 ParseFinishLine();
3094
3095 /*
3096 * For some reason - probably to make the parser impossible -
3097 * a ';' can be used to separate commands from dependencies.
3098 * Attempt to avoid ';' inside substitution patterns.
3099 */
3100 {
3101 int level = 0;
3102
3103 for (cp = line; *cp != 0; cp++) {
3104 if (*cp == '\\' && cp[1] != 0) {
3105 cp++;
3106 continue;
3107 }
3108 if (*cp == '$' &&
3109 (cp[1] == '(' || cp[1] == '{')) {
3110 level++;
3111 continue;
3112 }
3113 if (level > 0) {
3114 if (*cp == ')' || *cp == '}') {
3115 level--;
3116 continue;
3117 }
3118 } else if (*cp == ';') {
3119 break;
3120 }
3121 }
3122 }
3123 if (*cp != 0)
3124 /* Terminate the dependency list at the ';' */
3125 *cp++ = 0;
3126 else
3127 cp = NULL;
3128
3129 /*
3130 * We now know it's a dependency line so it needs to have all
3131 * variables expanded before being parsed. Tell the variable
3132 * module to complain if some variable is undefined...
3133 */
3134 line = Var_Subst(NULL, line, VAR_CMD, TRUE);
3135
3136 /*
3137 * Need a non-circular list for the target nodes
3138 */
3139 if (targets)
3140 Lst_Destroy(targets, NULL);
3141
3142 targets = Lst_Init(FALSE);
3143 inLine = TRUE;
3144
3145 ParseDoDependency(line);
3146 free(line);
3147
3148 /* If there were commands after a ';', add them now */
3149 if (cp != NULL) {
3150 goto shellCommand;
3151 }
3152 }
3153 /*
3154 * Reached EOF, but it may be just EOF of an include file...
3155 */
3156 } while (ParseEOF() == CONTINUE);
3157
3158 if (fatals) {
3159 (void)fflush(stdout);
3160 (void)fprintf(stderr,
3161 "%s: Fatal errors encountered -- cannot continue",
3162 progname);
3163 PrintOnError(NULL, NULL);
3164 exit(1);
3165 }
3166 }
3167
3168 /*-
3169 *---------------------------------------------------------------------
3170 * Parse_Init --
3171 * initialize the parsing module
3172 *
3173 * Results:
3174 * none
3175 *
3176 * Side Effects:
3177 * the parseIncPath list is initialized...
3178 *---------------------------------------------------------------------
3179 */
3180 void
Parse_Init(void)3181 Parse_Init(void)
3182 {
3183 mainNode = NULL;
3184 parseIncPath = Lst_Init(FALSE);
3185 sysIncPath = Lst_Init(FALSE);
3186 defIncPath = Lst_Init(FALSE);
3187 includes = Lst_Init(FALSE);
3188 #ifdef CLEANUP
3189 targCmds = Lst_Init(FALSE);
3190 #endif
3191 }
3192
3193 void
Parse_End(void)3194 Parse_End(void)
3195 {
3196 #ifdef CLEANUP
3197 Lst_Destroy(targCmds, (FreeProc *)free);
3198 if (targets)
3199 Lst_Destroy(targets, NULL);
3200 Lst_Destroy(defIncPath, Dir_Destroy);
3201 Lst_Destroy(sysIncPath, Dir_Destroy);
3202 Lst_Destroy(parseIncPath, Dir_Destroy);
3203 Lst_Destroy(includes, NULL); /* Should be empty now */
3204 #endif
3205 }
3206
3207
3208 /*-
3209 *-----------------------------------------------------------------------
3210 * Parse_MainName --
3211 * Return a Lst of the main target to create for main()'s sake. If
3212 * no such target exists, we Punt with an obnoxious error message.
3213 *
3214 * Results:
3215 * A Lst of the single node to create.
3216 *
3217 * Side Effects:
3218 * None.
3219 *
3220 *-----------------------------------------------------------------------
3221 */
3222 Lst
Parse_MainName(void)3223 Parse_MainName(void)
3224 {
3225 Lst mainList; /* result list */
3226
3227 mainList = Lst_Init(FALSE);
3228
3229 if (mainNode == NULL) {
3230 Punt("no target to make.");
3231 /*NOTREACHED*/
3232 } else if (mainNode->type & OP_DOUBLEDEP) {
3233 (void)Lst_AtEnd(mainList, mainNode);
3234 Lst_Concat(mainList, mainNode->cohorts, LST_CONCNEW);
3235 }
3236 else
3237 (void)Lst_AtEnd(mainList, mainNode);
3238 Var_Append(".TARGETS", mainNode->name, VAR_GLOBAL);
3239 return (mainList);
3240 }
3241
3242 /*-
3243 *-----------------------------------------------------------------------
3244 * ParseMark --
3245 * Add the filename and lineno to the GNode so that we remember
3246 * where it was first defined.
3247 *
3248 * Side Effects:
3249 * None.
3250 *
3251 *-----------------------------------------------------------------------
3252 */
3253 static void
ParseMark(GNode * gn)3254 ParseMark(GNode *gn)
3255 {
3256 gn->fname = curFile->fname;
3257 gn->lineno = curFile->lineno;
3258 }
3259