]>
git.wh0rd.org - dump.git/blob - compat/lib/compatglob.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 <stelian@popies.net>, 1999-2000
6 * Stelian Pop <stelian@popies.net> - AlcĂ´ve <www.alcove.com>, 2000-2002
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. Neither the name of the University nor the names of its contributors
25 * may be used to endorse or promote products derived from this software
26 * without specific prior written permission.
28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
42 * glob(3) -- a superset of the one defined in POSIX 1003.2.
44 * The [!...] convention to negate a range is supported (SysV, Posix, ksh).
46 * Optional extra services, controlled by flags not defined by POSIX:
49 * Escaping convention: \ inhibits any special meaning the following
50 * character might have (except \ at end of string is retained).
52 * Set in gl_flags if pattern contained a globbing character.
54 * Same as GLOB_NOCHECK, but it will only append pattern if it did
55 * not contain any magic characters. [Used in csh style globbing]
57 * Use alternately specified directory access functions.
59 * expand ~user/foo to the /home/dir/of/user/foo
61 * expand {1,2}{a,b} to 1a 1b 2a 2b
63 * Number of matches in the current invocation of glob.
67 static const char rcsid
[] =
68 "$Id: compatglob.c,v 1.9 2003/03/30 15:40:35 stelian Exp $";
75 #include <sys/param.h>
81 #include <compatglob.h>
100 #define UNDERSCORE '_'
108 #define M_QUOTE 0x8000
109 #define M_PROTECT 0x4000
110 #define M_MASK 0xffff
111 #define M_ASCII 0x00ff
113 typedef u_short Char
;
118 #define M_PROTECT 0x40
127 #define CHAR(c) ((Char)((c)&M_ASCII))
128 #define META(c) ((Char)((c)|M_QUOTE))
129 #define M_ALL META('*')
130 #define M_END META(']')
131 #define M_NOT META('!')
132 #define M_ONE META('?')
133 #define M_RNG META('-')
134 #define M_SET META('[')
135 #define ismeta(c) (((c)&M_QUOTE) != 0)
138 static int compare
__P((const void *, const void *));
139 static void g_Ctoc
__P((const Char
*, char *));
140 static int g_lstat
__P((Char
*, struct stat
*, glob_t
*));
141 static DIR *g_opendir
__P((Char
*, glob_t
*));
142 static Char
*g_strchr
__P((Char
*, int));
144 static Char
*g_strcat
__P((Char
*, const Char
*));
146 static int g_stat
__P((Char
*, struct stat
*, glob_t
*));
147 static int glob0
__P((const Char
*, glob_t
*));
148 static int glob1
__P((Char
*, glob_t
*));
149 static int glob2
__P((Char
*, Char
*, Char
*, glob_t
*));
150 static int glob3
__P((Char
*, Char
*, Char
*, Char
*, glob_t
*));
151 static int globextend
__P((const Char
*, glob_t
*));
152 static const Char
* globtilde
__P((const Char
*, Char
*, size_t, glob_t
*));
153 static int globexp1
__P((const Char
*, glob_t
*));
154 static int globexp2
__P((const Char
*, const Char
*, glob_t
*, int *));
155 static int match
__P((Char
*, Char
*, Char
*));
157 static void qprintf
__P((const char *, Char
*));
161 glob(const char *pattern
, int flags
, int (*errfunc
) __P((const char *, int)), glob_t
*pglob
)
163 const u_char
*patnext
;
165 Char
*bufnext
, *bufend
, patbuf
[MAXPATHLEN
+1];
167 patnext
= (u_char
*) pattern
;
168 if (!(flags
& GLOB_APPEND
)) {
170 pglob
->gl_pathv
= NULL
;
171 if (!(flags
& GLOB_DOOFFS
))
174 pglob
->gl_flags
= flags
& ~GLOB_MAGCHAR
;
175 pglob
->gl_errfunc
= errfunc
;
176 pglob
->gl_matchc
= 0;
179 bufend
= bufnext
+ MAXPATHLEN
;
180 if (flags
& GLOB_QUOTE
) {
181 /* Protect the quoted characters. */
182 while (bufnext
< bufend
&& (c
= *patnext
++) != EOS
)
184 if ((c
= *patnext
++) == EOS
) {
188 *bufnext
++ = c
| M_PROTECT
;
194 while (bufnext
< bufend
&& (c
= *patnext
++) != EOS
)
198 if (flags
& GLOB_BRACE
)
199 return globexp1(patbuf
, pglob
);
201 return glob0(patbuf
, pglob
);
205 * Expand recursively a glob {} pattern. When there is no more expansion
206 * invoke the standard globbing routine to glob the rest of the magic
209 static int globexp1(const Char
*pattern
, glob_t
*pglob
)
211 const Char
* ptr
= pattern
;
214 /* Protect a single {}, for find(1), like csh */
215 if (pattern
[0] == LBRACE
&& pattern
[1] == RBRACE
&& pattern
[2] == EOS
)
216 return glob0(pattern
, pglob
);
218 while ((ptr
= (const Char
*) g_strchr((Char
*) ptr
, LBRACE
)) != NULL
)
219 if (!globexp2(ptr
, pattern
, pglob
, &rv
))
222 return glob0(pattern
, pglob
);
227 * Recursive brace globbing helper. Tries to expand a single brace.
228 * If it succeeds then it invokes globexp1 with the new pattern.
229 * If it fails then it tries to glob the rest of the pattern and returns.
231 static int globexp2(const Char
*ptr
, const Char
*pattern
, glob_t
*pglob
, int *rv
)
235 const Char
*pe
, *pm
, *pl
;
236 Char patbuf
[MAXPATHLEN
+ 1];
238 /* copy part up to the brace */
239 for (lm
= patbuf
, pm
= pattern
; pm
!= ptr
; *lm
++ = *pm
++)
243 /* Find the balanced brace */
244 for (i
= 0, pe
= ++ptr
; *pe
; pe
++)
245 if (*pe
== LBRACKET
) {
246 /* Ignore everything between [] */
247 for (pm
= pe
++; *pe
!= RBRACKET
&& *pe
!= EOS
; pe
++)
251 * We could not find a matching RBRACKET.
252 * Ignore and just look for RBRACE
257 else if (*pe
== LBRACE
)
259 else if (*pe
== RBRACE
) {
265 /* Non matching braces; just glob the pattern */
266 if (i
!= 0 || *pe
== EOS
) {
267 *rv
= glob0(patbuf
, pglob
);
271 for (i
= 0, pl
= pm
= ptr
; pm
<= pe
; pm
++)
274 /* Ignore everything between [] */
275 for (pl
= pm
++; *pm
!= RBRACKET
&& *pm
!= EOS
; pm
++)
279 * We could not find a matching RBRACKET.
280 * Ignore and just look for RBRACE
297 if (i
&& *pm
== COMMA
)
300 /* Append the current string */
301 for (lm
= ls
; (pl
< pm
); *lm
++ = *pl
++)
304 * Append the rest of the pattern after the
307 for (pl
= pe
+ 1; (*lm
++ = *pl
++) != EOS
;)
310 /* Expand the current pattern */
312 qprintf("globexp2:", patbuf
);
314 *rv
= globexp1(patbuf
, pglob
);
316 /* move after the comma, to the next string */
331 * expand tilde from the passwd file.
334 globtilde(const Char
*pattern
, Char
*patbuf
, size_t patbuf_len
, glob_t
*pglob
)
341 if (*pattern
!= TILDE
|| !(pglob
->gl_flags
& GLOB_TILDE
))
345 * Copy up to the end of the string or /
347 eb
= &patbuf
[patbuf_len
- 1];
348 for (p
= pattern
+ 1, h
= (char *) patbuf
;
349 h
< (char *)eb
&& *p
&& *p
!= SLASH
; *h
++ = *p
++)
354 if (((char *) patbuf
)[0] == EOS
) {
356 * handle a plain ~ or ~/ by expanding $HOME first if
357 * we're not running setuid or setgid) and then trying
362 #ifndef __NETBSD_SYSCALLS
366 (h
= getenv("HOME")) == NULL
) {
367 if (((h
= getlogin()) != NULL
&&
368 (pwd
= getpwnam(h
)) != NULL
) ||
369 (pwd
= getpwuid(getuid())) != NULL
)
379 if ((pwd
= getpwnam((char*) patbuf
)) == NULL
)
385 /* Copy the home directory */
386 for (b
= patbuf
; b
< eb
&& *h
; *b
++ = *h
++)
389 /* Append the rest of the pattern */
390 while (b
< eb
&& (*b
++ = *p
++) != EOS
)
399 * The main glob() routine: compiles the pattern (optionally processing
400 * quotes), calls glob1() to do the real pattern matching, and finally
401 * sorts the list (unless unsorted operation is requested). Returns 0
402 * if things went well, nonzero if errors occurred. It is not an error
403 * to find no matches.
406 glob0(const Char
*pattern
, glob_t
*pglob
)
408 const Char
*qpatnext
;
409 int c
, err
, oldpathc
;
410 Char
*bufnext
, patbuf
[MAXPATHLEN
+1];
412 qpatnext
= globtilde(pattern
, patbuf
, sizeof(patbuf
) / sizeof(Char
),
414 oldpathc
= pglob
->gl_pathc
;
417 /* We don't need to check for buffer overflow any more. */
418 while ((c
= *qpatnext
++) != EOS
) {
424 if (*qpatnext
== EOS
||
425 g_strchr((Char
*) qpatnext
+1, RBRACKET
) == NULL
) {
426 *bufnext
++ = LBRACKET
;
436 *bufnext
++ = CHAR(c
);
437 if (*qpatnext
== RANGE
&&
438 (c
= qpatnext
[1]) != RBRACKET
) {
440 *bufnext
++ = CHAR(c
);
443 } while ((c
= *qpatnext
++) != RBRACKET
);
444 pglob
->gl_flags
|= GLOB_MAGCHAR
;
448 pglob
->gl_flags
|= GLOB_MAGCHAR
;
452 pglob
->gl_flags
|= GLOB_MAGCHAR
;
453 /* collapse adjacent stars to one,
454 * to avoid exponential behavior
456 if (bufnext
== patbuf
|| bufnext
[-1] != M_ALL
)
460 *bufnext
++ = CHAR(c
);
466 qprintf("glob0:", patbuf
);
469 if ((err
= glob1(patbuf
, pglob
)) != 0)
473 * If there was no match we are going to append the pattern
474 * if GLOB_NOCHECK was specified or if GLOB_NOMAGIC was specified
475 * and the pattern did not contain any magic characters
476 * GLOB_NOMAGIC is there just for compatibility with csh.
478 if (pglob
->gl_pathc
== oldpathc
&&
479 ((pglob
->gl_flags
& GLOB_NOCHECK
) ||
480 ((pglob
->gl_flags
& GLOB_NOMAGIC
) &&
481 !(pglob
->gl_flags
& GLOB_MAGCHAR
))))
482 return(globextend(pattern
, pglob
));
483 else if (!(pglob
->gl_flags
& GLOB_NOSORT
))
484 qsort(pglob
->gl_pathv
+ pglob
->gl_offs
+ oldpathc
,
485 pglob
->gl_pathc
- oldpathc
, sizeof(char *), compare
);
490 compare(const void *p
, const void *q
)
492 return(strcmp(*(char **)p
, *(char **)q
));
496 glob1(Char
*pattern
, glob_t
*pglob
)
498 Char pathbuf
[MAXPATHLEN
+1];
500 /* A null pathname is invalid -- POSIX 1003.1 sect. 2.4. */
503 return(glob2(pathbuf
, pathbuf
, pattern
, pglob
));
507 * The functions glob2 and glob3 are mutually recursive; there is one level
508 * of recursion for each segment in the pattern that contains one or more
512 glob2(Char
*pathbuf
, Char
*pathend
, Char
*pattern
, glob_t
*pglob
)
519 * Loop over pattern segments until end of pattern or until
520 * segment with meta character found.
522 for (anymeta
= 0;;) {
523 if (*pattern
== EOS
) { /* End of pattern? */
525 if (g_lstat(pathbuf
, &sb
, pglob
))
528 if (((pglob
->gl_flags
& GLOB_MARK
) &&
529 pathend
[-1] != SEP
) && (S_ISDIR(sb
.st_mode
)
530 || (S_ISLNK(sb
.st_mode
) &&
531 (g_stat(pathbuf
, &sb
, pglob
) == 0) &&
532 S_ISDIR(sb
.st_mode
)))) {
537 return(globextend(pathbuf
, pglob
));
540 /* Find end of next segment, copy tentatively to pathend. */
543 while (*p
!= EOS
&& *p
!= SEP
) {
549 if (!anymeta
) { /* No expansion, do next segment. */
552 while (*pattern
== SEP
)
553 *pathend
++ = *pattern
++;
554 } else /* Need expansion, recurse. */
555 return(glob3(pathbuf
, pathend
, pattern
, p
, pglob
));
561 glob3(Char
*pathbuf
, Char
*pathend
, Char
*pattern
, Char
*restpattern
, glob_t
*pglob
)
566 char buf
[MAXPATHLEN
];
569 * The readdirfunc declaration can't be prototyped, because it is
570 * assigned, below, to two functions which are prototyped in glob.h
571 * and dirent.h as taking pointers to differently typed opaque
574 struct dirent
*(*readdirfunc
)();
579 if ((dirp
= g_opendir(pathbuf
, pglob
)) == NULL
) {
580 /* TODO: don't call for ENOENT or ENOTDIR? */
581 if (pglob
->gl_errfunc
) {
582 g_Ctoc(pathbuf
, buf
);
583 if (pglob
->gl_errfunc(buf
, errno
) ||
584 pglob
->gl_flags
& GLOB_ERR
)
592 /* Search directory for matching names. */
593 if (pglob
->gl_flags
& GLOB_ALTDIRFUNC
)
594 readdirfunc
= pglob
->gl_readdir
;
596 readdirfunc
= readdir
;
597 while ((dp
= (*readdirfunc
)(dirp
))) {
601 /* Initial DOT must be matched literally. */
602 if (dp
->d_name
[0] == DOT
&& *pattern
!= DOT
)
604 for (sc
= (u_char
*) dp
->d_name
, dc
= pathend
;
605 (*dc
++ = *sc
++) != EOS
;)
607 if (!match(pathend
, pattern
, restpattern
)) {
611 err
= glob2(pathbuf
, --dc
, restpattern
, pglob
);
616 if (pglob
->gl_flags
& GLOB_ALTDIRFUNC
)
617 (*pglob
->gl_closedir
)(dirp
);
625 * Extend the gl_pathv member of a glob_t structure to accomodate a new item,
626 * add the new item, and update gl_pathc.
628 * This assumes the BSD realloc, which only copies the block when its size
629 * crosses a power-of-two boundary; for v7 realloc, this would cause quadratic
632 * Return 0 if new item added, error code if memory couldn't be allocated.
634 * Invariant of the glob_t structure:
635 * Either gl_pathc is zero and gl_pathv is NULL; or gl_pathc > 0 and
636 * gl_pathv points to (gl_offs + gl_pathc + 1) items.
639 globextend(const Char
*path
, glob_t
*pglob
)
647 newsize
= sizeof(*pathv
) * (2 + pglob
->gl_pathc
+ pglob
->gl_offs
);
648 pathv
= pglob
->gl_pathv
?
649 realloc((char *)pglob
->gl_pathv
, newsize
) :
652 return(GLOB_NOSPACE
);
654 if (pglob
->gl_pathv
== NULL
&& pglob
->gl_offs
> 0) {
655 /* first time around -- clear initial gl_offs items */
656 pathv
+= pglob
->gl_offs
;
657 for (i
= pglob
->gl_offs
; --i
>= 0; )
660 pglob
->gl_pathv
= pathv
;
662 for (p
= path
; *p
++;)
664 if ((copy
= malloc(p
- path
)) != NULL
) {
666 pathv
[pglob
->gl_offs
+ pglob
->gl_pathc
++] = copy
;
668 pathv
[pglob
->gl_offs
+ pglob
->gl_pathc
] = NULL
;
669 return(copy
== NULL
? GLOB_NOSPACE
: 0);
673 * pattern matching function for filenames. Each occurrence of the *
674 * pattern causes a recursion level.
677 match(Char
*name
, Char
*pat
, Char
*patend
)
679 int ok
, negate_range
;
682 while (pat
< patend
) {
684 switch (c
& M_MASK
) {
689 if (match(name
, pat
, patend
))
691 while (*name
++ != EOS
);
699 if ((k
= *name
++) == EOS
)
701 if ((negate_range
= ((*pat
& M_MASK
) == M_NOT
)) != EOS
)
703 while (((c
= *pat
++) & M_MASK
) != M_END
)
704 if ((*pat
& M_MASK
) == M_RNG
) {
705 if (c
<= k
&& k
<= pat
[1])
710 if (ok
== negate_range
)
719 return(*name
== EOS
);
722 /* Free allocated data belonging to a glob_t structure. */
724 globfree(glob_t
*pglob
)
729 if (pglob
->gl_pathv
!= NULL
) {
730 pp
= pglob
->gl_pathv
+ pglob
->gl_offs
;
731 for (i
= pglob
->gl_pathc
; i
--; ++pp
)
734 free(pglob
->gl_pathv
);
739 g_opendir(Char
*str
, glob_t
*pglob
)
741 char buf
[MAXPATHLEN
];
748 if (pglob
->gl_flags
& GLOB_ALTDIRFUNC
)
749 return((*pglob
->gl_opendir
)(buf
));
751 return(opendir(buf
));
755 g_lstat(Char
*fn
, struct stat
*sb
, glob_t
*pglob
)
757 char buf
[MAXPATHLEN
];
760 if (pglob
->gl_flags
& GLOB_ALTDIRFUNC
)
761 return((*pglob
->gl_lstat
)(buf
, sb
));
762 return(lstat(buf
, sb
));
766 g_stat(Char
*fn
, struct stat
*sb
, glob_t
*pglob
)
768 char buf
[MAXPATHLEN
];
771 if (pglob
->gl_flags
& GLOB_ALTDIRFUNC
)
772 return((*pglob
->gl_stat
)(buf
, sb
));
773 return(stat(buf
, sb
));
777 g_strchr(Char
*str
, int ch
)
788 g_strcat(Char
*dst
, const Char
*src
)
795 while((*dst
++ = *src
++) != EOS
)
803 g_Ctoc(const Char
*str
, char *buf
)
807 for (dc
= buf
; (*dc
++ = *str
++) != EOS
;)
813 qprintf(const char *str
, Char
*s
)
817 (void)printf("%s:\n", str
);
819 (void)printf("%c", CHAR(*p
));
822 (void)printf("%c", *p
& M_PROTECT
? '"' : ' ');
825 (void)printf("%c", ismeta(*p
) ? '_' : ' ');
830 #endif /* ! HAVE_GLOB */