]>
git.wh0rd.org - dump.git/blob - compat/lib/glob.c
2 * Ported to Linux's Second Extended File System as part of the
3 * dump and restore backup suit
4 * Remy Card <card@Linux.EU.Org>, 1994-1997
5 * Stelian Pop <pop@cybercable.fr>, 1999
10 * Copyright (c) 1989, 1993
11 * The Regents of the University of California. All rights reserved.
13 * This code is derived from software contributed to Berkeley by
16 * Redistribution and use in source and binary forms, with or without
17 * modification, are permitted provided that the following conditions
19 * 1. Redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer.
21 * 2. Redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution.
24 * 3. All advertising materials mentioning features or use of this software
25 * must display the following acknowledgement:
26 * This product includes software developed by the University of
27 * California, Berkeley and its contributors.
28 * 4. Neither the name of the University nor the names of its contributors
29 * may be used to endorse or promote products derived from this software
30 * without specific prior written permission.
32 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
33 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
34 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
35 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
36 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
40 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
41 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
45 #if defined(LIBC_SCCS) && !defined(lint)
46 static char sccsid
[] = "@(#)glob.c 8.3 (Berkeley) 10/13/93";
47 #endif /* LIBC_SCCS and not lint */
50 * glob(3) -- a superset of the one defined in POSIX 1003.2.
52 * The [!...] convention to negate a range is supported (SysV, Posix, ksh).
54 * Optional extra services, controlled by flags not defined by POSIX:
57 * Escaping convention: \ inhibits any special meaning the following
58 * character might have (except \ at end of string is retained).
60 * Set in gl_flags if pattern contained a globbing character.
62 * Same as GLOB_NOCHECK, but it will only append pattern if it did
63 * not contain any magic characters. [Used in csh style globbing]
65 * Use alternately specified directory access functions.
67 * expand ~user/foo to the /home/dir/of/user/foo
69 * expand {1,2}{a,b} to 1a 1b 2a 2b
71 * Number of matches in the current invocation of glob.
74 #include <sys/param.h>
99 #define UNDERSCORE '_'
107 #define M_QUOTE 0x8000
108 #define M_PROTECT 0x4000
109 #define M_MASK 0xffff
110 #define M_ASCII 0x00ff
112 typedef u_short Char
;
117 #define M_PROTECT 0x40
126 #define CHAR(c) ((Char)((c)&M_ASCII))
127 #define META(c) ((Char)((c)|M_QUOTE))
128 #define M_ALL META('*')
129 #define M_END META(']')
130 #define M_NOT META('!')
131 #define M_ONE META('?')
132 #define M_RNG META('-')
133 #define M_SET META('[')
134 #define ismeta(c) (((c)&M_QUOTE) != 0)
137 static int compare
__P((const void *, const void *));
138 static void g_Ctoc
__P((const Char
*, char *));
139 static int g_lstat
__P((Char
*, struct stat
*, glob_t
*));
140 static DIR *g_opendir
__P((Char
*, glob_t
*));
141 static Char
*g_strchr
__P((Char
*, int));
143 static Char
*g_strcat
__P((Char
*, const Char
*));
145 static int g_stat
__P((Char
*, struct stat
*, glob_t
*));
146 static int glob0
__P((const Char
*, glob_t
*));
147 static int glob1
__P((Char
*, glob_t
*));
148 static int glob2
__P((Char
*, Char
*, Char
*, glob_t
*));
149 static int glob3
__P((Char
*, Char
*, Char
*, Char
*, glob_t
*));
150 static int globextend
__P((const Char
*, glob_t
*));
151 static const Char
* globtilde
__P((const Char
*, Char
*, size_t, glob_t
*));
152 static int globexp1
__P((const Char
*, glob_t
*));
153 static int globexp2
__P((const Char
*, const Char
*, glob_t
*, int *));
154 static int match
__P((Char
*, Char
*, Char
*));
156 static void qprintf
__P((const char *, Char
*));
160 glob(pattern
, flags
, errfunc
, pglob
)
162 int flags
, (*errfunc
) __P((const char *, int));
165 const u_char
*patnext
;
167 Char
*bufnext
, *bufend
, patbuf
[MAXPATHLEN
+1];
169 patnext
= (u_char
*) pattern
;
170 if (!(flags
& GLOB_APPEND
)) {
172 pglob
->gl_pathv
= NULL
;
173 if (!(flags
& GLOB_DOOFFS
))
176 pglob
->gl_flags
= flags
& ~GLOB_MAGCHAR
;
177 pglob
->gl_errfunc
= errfunc
;
178 pglob
->gl_matchc
= 0;
181 bufend
= bufnext
+ MAXPATHLEN
;
182 if (flags
& GLOB_QUOTE
) {
183 /* Protect the quoted characters. */
184 while (bufnext
< bufend
&& (c
= *patnext
++) != EOS
)
186 if ((c
= *patnext
++) == EOS
) {
190 *bufnext
++ = c
| M_PROTECT
;
196 while (bufnext
< bufend
&& (c
= *patnext
++) != EOS
)
200 if (flags
& GLOB_BRACE
)
201 return globexp1(patbuf
, pglob
);
203 return glob0(patbuf
, pglob
);
207 * Expand recursively a glob {} pattern. When there is no more expansion
208 * invoke the standard globbing routine to glob the rest of the magic
211 static int globexp1(pattern
, pglob
)
215 const Char
* ptr
= pattern
;
218 /* Protect a single {}, for find(1), like csh */
219 if (pattern
[0] == LBRACE
&& pattern
[1] == RBRACE
&& pattern
[2] == EOS
)
220 return glob0(pattern
, pglob
);
222 while ((ptr
= (const Char
*) g_strchr((Char
*) ptr
, LBRACE
)) != NULL
)
223 if (!globexp2(ptr
, pattern
, pglob
, &rv
))
226 return glob0(pattern
, pglob
);
231 * Recursive brace globbing helper. Tries to expand a single brace.
232 * If it succeeds then it invokes globexp1 with the new pattern.
233 * If it fails then it tries to glob the rest of the pattern and returns.
235 static int globexp2(ptr
, pattern
, pglob
, rv
)
236 const Char
*ptr
, *pattern
;
242 const Char
*pe
, *pm
, *pl
;
243 Char patbuf
[MAXPATHLEN
+ 1];
245 /* copy part up to the brace */
246 for (lm
= patbuf
, pm
= pattern
; pm
!= ptr
; *lm
++ = *pm
++)
250 /* Find the balanced brace */
251 for (i
= 0, pe
= ++ptr
; *pe
; pe
++)
252 if (*pe
== LBRACKET
) {
253 /* Ignore everything between [] */
254 for (pm
= pe
++; *pe
!= RBRACKET
&& *pe
!= EOS
; pe
++)
258 * We could not find a matching RBRACKET.
259 * Ignore and just look for RBRACE
264 else if (*pe
== LBRACE
)
266 else if (*pe
== RBRACE
) {
272 /* Non matching braces; just glob the pattern */
273 if (i
!= 0 || *pe
== EOS
) {
274 *rv
= glob0(patbuf
, pglob
);
278 for (i
= 0, pl
= pm
= ptr
; pm
<= pe
; pm
++)
281 /* Ignore everything between [] */
282 for (pl
= pm
++; *pm
!= RBRACKET
&& *pm
!= EOS
; pm
++)
286 * We could not find a matching RBRACKET.
287 * Ignore and just look for RBRACE
304 if (i
&& *pm
== COMMA
)
307 /* Append the current string */
308 for (lm
= ls
; (pl
< pm
); *lm
++ = *pl
++)
311 * Append the rest of the pattern after the
314 for (pl
= pe
+ 1; (*lm
++ = *pl
++) != EOS
;)
317 /* Expand the current pattern */
319 qprintf("globexp2:", patbuf
);
321 *rv
= globexp1(patbuf
, pglob
);
323 /* move after the comma, to the next string */
338 * expand tilde from the passwd file.
341 globtilde(pattern
, patbuf
, patbuf_len
, pglob
)
352 if (*pattern
!= TILDE
|| !(pglob
->gl_flags
& GLOB_TILDE
))
356 * Copy up to the end of the string or /
358 eb
= &patbuf
[patbuf_len
- 1];
359 for (p
= pattern
+ 1, h
= (char *) patbuf
;
360 h
< (char *)eb
&& *p
&& *p
!= SLASH
; *h
++ = *p
++)
365 if (((char *) patbuf
)[0] == EOS
) {
367 * handle a plain ~ or ~/ by expanding $HOME first if
368 * we're not running setuid or setgid) and then trying
373 #ifndef __NETBSD_SYSCALLS
377 (h
= getenv("HOME")) == NULL
) {
378 if (((h
= getlogin()) != NULL
&&
379 (pwd
= getpwnam(h
)) != NULL
) ||
380 (pwd
= getpwuid(getuid())) != NULL
)
390 if ((pwd
= getpwnam((char*) patbuf
)) == NULL
)
396 /* Copy the home directory */
397 for (b
= patbuf
; b
< eb
&& *h
; *b
++ = *h
++)
400 /* Append the rest of the pattern */
401 while (b
< eb
&& (*b
++ = *p
++) != EOS
)
410 * The main glob() routine: compiles the pattern (optionally processing
411 * quotes), calls glob1() to do the real pattern matching, and finally
412 * sorts the list (unless unsorted operation is requested). Returns 0
413 * if things went well, nonzero if errors occurred. It is not an error
414 * to find no matches.
417 glob0(pattern
, pglob
)
421 const Char
*qpatnext
;
422 int c
, err
, oldpathc
;
423 Char
*bufnext
, patbuf
[MAXPATHLEN
+1];
425 qpatnext
= globtilde(pattern
, patbuf
, sizeof(patbuf
) / sizeof(Char
),
427 oldpathc
= pglob
->gl_pathc
;
430 /* We don't need to check for buffer overflow any more. */
431 while ((c
= *qpatnext
++) != EOS
) {
437 if (*qpatnext
== EOS
||
438 g_strchr((Char
*) qpatnext
+1, RBRACKET
) == NULL
) {
439 *bufnext
++ = LBRACKET
;
449 *bufnext
++ = CHAR(c
);
450 if (*qpatnext
== RANGE
&&
451 (c
= qpatnext
[1]) != RBRACKET
) {
453 *bufnext
++ = CHAR(c
);
456 } while ((c
= *qpatnext
++) != RBRACKET
);
457 pglob
->gl_flags
|= GLOB_MAGCHAR
;
461 pglob
->gl_flags
|= GLOB_MAGCHAR
;
465 pglob
->gl_flags
|= GLOB_MAGCHAR
;
466 /* collapse adjacent stars to one,
467 * to avoid exponential behavior
469 if (bufnext
== patbuf
|| bufnext
[-1] != M_ALL
)
473 *bufnext
++ = CHAR(c
);
479 qprintf("glob0:", patbuf
);
482 if ((err
= glob1(patbuf
, pglob
)) != 0)
486 * If there was no match we are going to append the pattern
487 * if GLOB_NOCHECK was specified or if GLOB_NOMAGIC was specified
488 * and the pattern did not contain any magic characters
489 * GLOB_NOMAGIC is there just for compatibility with csh.
491 if (pglob
->gl_pathc
== oldpathc
&&
492 ((pglob
->gl_flags
& GLOB_NOCHECK
) ||
493 ((pglob
->gl_flags
& GLOB_NOMAGIC
) &&
494 !(pglob
->gl_flags
& GLOB_MAGCHAR
))))
495 return(globextend(pattern
, pglob
));
496 else if (!(pglob
->gl_flags
& GLOB_NOSORT
))
497 qsort(pglob
->gl_pathv
+ pglob
->gl_offs
+ oldpathc
,
498 pglob
->gl_pathc
- oldpathc
, sizeof(char *), compare
);
506 return(strcmp(*(char **)p
, *(char **)q
));
510 glob1(pattern
, pglob
)
514 Char pathbuf
[MAXPATHLEN
+1];
516 /* A null pathname is invalid -- POSIX 1003.1 sect. 2.4. */
519 return(glob2(pathbuf
, pathbuf
, pattern
, pglob
));
523 * The functions glob2 and glob3 are mutually recursive; there is one level
524 * of recursion for each segment in the pattern that contains one or more
528 glob2(pathbuf
, pathend
, pattern
, pglob
)
529 Char
*pathbuf
, *pathend
, *pattern
;
537 * Loop over pattern segments until end of pattern or until
538 * segment with meta character found.
540 for (anymeta
= 0;;) {
541 if (*pattern
== EOS
) { /* End of pattern? */
543 if (g_lstat(pathbuf
, &sb
, pglob
))
546 if (((pglob
->gl_flags
& GLOB_MARK
) &&
547 pathend
[-1] != SEP
) && (S_ISDIR(sb
.st_mode
)
548 || (S_ISLNK(sb
.st_mode
) &&
549 (g_stat(pathbuf
, &sb
, pglob
) == 0) &&
550 S_ISDIR(sb
.st_mode
)))) {
555 return(globextend(pathbuf
, pglob
));
558 /* Find end of next segment, copy tentatively to pathend. */
561 while (*p
!= EOS
&& *p
!= SEP
) {
567 if (!anymeta
) { /* No expansion, do next segment. */
570 while (*pattern
== SEP
)
571 *pathend
++ = *pattern
++;
572 } else /* Need expansion, recurse. */
573 return(glob3(pathbuf
, pathend
, pattern
, p
, pglob
));
579 glob3(pathbuf
, pathend
, pattern
, restpattern
, pglob
)
580 Char
*pathbuf
, *pathend
, *pattern
, *restpattern
;
583 register struct dirent
*dp
;
586 char buf
[MAXPATHLEN
];
589 * The readdirfunc declaration can't be prototyped, because it is
590 * assigned, below, to two functions which are prototyped in glob.h
591 * and dirent.h as taking pointers to differently typed opaque
594 struct dirent
*(*readdirfunc
)();
599 if ((dirp
= g_opendir(pathbuf
, pglob
)) == NULL
) {
600 /* TODO: don't call for ENOENT or ENOTDIR? */
601 if (pglob
->gl_errfunc
) {
602 g_Ctoc(pathbuf
, buf
);
603 if (pglob
->gl_errfunc(buf
, errno
) ||
604 pglob
->gl_flags
& GLOB_ERR
)
612 /* Search directory for matching names. */
613 if (pglob
->gl_flags
& GLOB_ALTDIRFUNC
)
614 readdirfunc
= pglob
->gl_readdir
;
616 readdirfunc
= readdir
;
617 while ((dp
= (*readdirfunc
)(dirp
))) {
621 /* Initial DOT must be matched literally. */
622 if (dp
->d_name
[0] == DOT
&& *pattern
!= DOT
)
624 for (sc
= (u_char
*) dp
->d_name
, dc
= pathend
;
625 (*dc
++ = *sc
++) != EOS
;)
627 if (!match(pathend
, pattern
, restpattern
)) {
631 err
= glob2(pathbuf
, --dc
, restpattern
, pglob
);
636 if (pglob
->gl_flags
& GLOB_ALTDIRFUNC
)
637 (*pglob
->gl_closedir
)(dirp
);
645 * Extend the gl_pathv member of a glob_t structure to accomodate a new item,
646 * add the new item, and update gl_pathc.
648 * This assumes the BSD realloc, which only copies the block when its size
649 * crosses a power-of-two boundary; for v7 realloc, this would cause quadratic
652 * Return 0 if new item added, error code if memory couldn't be allocated.
654 * Invariant of the glob_t structure:
655 * Either gl_pathc is zero and gl_pathv is NULL; or gl_pathc > 0 and
656 * gl_pathv points to (gl_offs + gl_pathc + 1) items.
659 globextend(path
, pglob
)
663 register char **pathv
;
669 newsize
= sizeof(*pathv
) * (2 + pglob
->gl_pathc
+ pglob
->gl_offs
);
670 pathv
= pglob
->gl_pathv
?
671 realloc((char *)pglob
->gl_pathv
, newsize
) :
674 return(GLOB_NOSPACE
);
676 if (pglob
->gl_pathv
== NULL
&& pglob
->gl_offs
> 0) {
677 /* first time around -- clear initial gl_offs items */
678 pathv
+= pglob
->gl_offs
;
679 for (i
= pglob
->gl_offs
; --i
>= 0; )
682 pglob
->gl_pathv
= pathv
;
684 for (p
= path
; *p
++;)
686 if ((copy
= malloc(p
- path
)) != NULL
) {
688 pathv
[pglob
->gl_offs
+ pglob
->gl_pathc
++] = copy
;
690 pathv
[pglob
->gl_offs
+ pglob
->gl_pathc
] = NULL
;
691 return(copy
== NULL
? GLOB_NOSPACE
: 0);
695 * pattern matching function for filenames. Each occurrence of the *
696 * pattern causes a recursion level.
699 match(name
, pat
, patend
)
700 register Char
*name
, *pat
, *patend
;
702 int ok
, negate_range
;
705 while (pat
< patend
) {
707 switch (c
& M_MASK
) {
712 if (match(name
, pat
, patend
))
714 while (*name
++ != EOS
);
722 if ((k
= *name
++) == EOS
)
724 if ((negate_range
= ((*pat
& M_MASK
) == M_NOT
)) != EOS
)
726 while (((c
= *pat
++) & M_MASK
) != M_END
)
727 if ((*pat
& M_MASK
) == M_RNG
) {
728 if (c
<= k
&& k
<= pat
[1])
733 if (ok
== negate_range
)
742 return(*name
== EOS
);
745 /* Free allocated data belonging to a glob_t structure. */
753 if (pglob
->gl_pathv
!= NULL
) {
754 pp
= pglob
->gl_pathv
+ pglob
->gl_offs
;
755 for (i
= pglob
->gl_pathc
; i
--; ++pp
)
758 free(pglob
->gl_pathv
);
763 g_opendir(str
, pglob
)
767 char buf
[MAXPATHLEN
];
774 if (pglob
->gl_flags
& GLOB_ALTDIRFUNC
)
775 return((*pglob
->gl_opendir
)(buf
));
777 return(opendir(buf
));
781 g_lstat(fn
, sb
, pglob
)
786 char buf
[MAXPATHLEN
];
789 if (pglob
->gl_flags
& GLOB_ALTDIRFUNC
)
790 return((*pglob
->gl_lstat
)(buf
, sb
));
791 return(lstat(buf
, sb
));
795 g_stat(fn
, sb
, pglob
)
800 char buf
[MAXPATHLEN
];
803 if (pglob
->gl_flags
& GLOB_ALTDIRFUNC
)
804 return((*pglob
->gl_stat
)(buf
, sb
));
805 return(stat(buf
, sb
));
831 while((*dst
++ = *src
++) != EOS
)
840 register const Char
*str
;
845 for (dc
= buf
; (*dc
++ = *str
++) != EOS
;)
857 (void)printf("%s:\n", str
);
859 (void)printf("%c", CHAR(*p
));
862 (void)printf("%c", *p
& M_PROTECT
? '"' : ' ');
865 (void)printf("%c", ismeta(*p
) ? '_' : ' ');