1 /* $OpenBSD: glob.c,v 1.26 2005/11/28 17:50:12 deraadt Exp $ */
3 * Copyright (c) 1989, 1993
4 * The Regents of the University of California. All rights reserved.
6 * This code is derived from software contributed to Berkeley by
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10 * modification, are permitted provided that the following conditions
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13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * _wapi_glob(3) -- a subset of the one defined in POSIX 1003.2.
37 * Optional extra services, controlled by flags not defined by POSIX:
40 * Set in gl_flags if pattern contained a globbing character.
42 #include <sys/types.h>
53 #include "wapi_glob.h"
63 #define M_QUOTE 0x8000
64 #define M_PROTECT 0x4000
66 #define M_ASCII 0x00ff
68 typedef unsigned short Char
;
73 #define M_PROTECT 0x40
82 #define CHAR(c) ((gchar)((c)&M_ASCII))
83 #define META(c) ((gchar)((c)|M_QUOTE))
84 #define M_ALL META('*')
85 #define M_ONE META('?')
86 #define ismeta(c) (((c)&M_QUOTE) != 0)
89 static int g_Ctoc(const gchar
*, char *, unsigned int);
90 static int glob0(GDir
*dir
, const gchar
*, wapi_glob_t
*, gboolean
,
92 static int glob1(GDir
*dir
, gchar
*, gchar
*, wapi_glob_t
*, size_t *,
94 static int glob3(GDir
*dir
, gchar
*, gchar
*, wapi_glob_t
*, size_t *,
96 static int globextend(const gchar
*, wapi_glob_t
*, size_t *);
97 static int match(const gchar
*, gchar
*, gchar
*, gboolean
);
99 static void qprintf(const char *, Char
*);
103 _wapi_glob(GDir
*dir
, const char *pattern
, int flags
, wapi_glob_t
*pglob
)
105 const unsigned char *patnext
;
107 gchar
*bufnext
, *bufend
, patbuf
[PATH_MAX
];
109 patnext
= (unsigned char *) pattern
;
110 if (!(flags
& WAPI_GLOB_APPEND
)) {
112 pglob
->gl_pathv
= NULL
;
115 pglob
->gl_flags
= flags
& ~WAPI_GLOB_MAGCHAR
;
118 bufend
= bufnext
+ PATH_MAX
- 1;
120 /* Protect the quoted characters. */
121 while (bufnext
< bufend
&& (c
= *patnext
++) != EOS
)
123 if ((c
= *patnext
++) == EOS
) {
127 *bufnext
++ = c
| M_PROTECT
;
133 return glob0(dir
, patbuf
, pglob
, flags
& WAPI_GLOB_IGNORECASE
,
134 flags
& WAPI_GLOB_UNIQUE
);
138 * The main glob() routine: compiles the pattern (optionally processing
139 * quotes), calls glob1() to do the real pattern matching, and finally
140 * sorts the list (unless unsorted operation is requested). Returns 0
141 * if things went well, nonzero if errors occurred. It is not an error
142 * to find no matches.
145 glob0(GDir
*dir
, const gchar
*pattern
, wapi_glob_t
*pglob
, gboolean ignorecase
,
148 const gchar
*qpatnext
;
149 int c
, err
, oldpathc
;
150 gchar
*bufnext
, patbuf
[PATH_MAX
];
154 oldpathc
= pglob
->gl_pathc
;
157 /* We don't need to check for buffer overflow any more. */
158 while ((c
= *qpatnext
++) != EOS
) {
161 pglob
->gl_flags
|= WAPI_GLOB_MAGCHAR
;
165 pglob
->gl_flags
|= WAPI_GLOB_MAGCHAR
;
166 /* collapse adjacent stars to one,
167 * to avoid exponential behavior
169 if (bufnext
== patbuf
|| bufnext
[-1] != M_ALL
)
173 *bufnext
++ = CHAR(c
);
179 qprintf("glob0:", patbuf
);
182 if ((err
= glob1(dir
, patbuf
, patbuf
+PATH_MAX
-1, pglob
, &limit
,
183 ignorecase
, unique
)) != 0)
186 if (pglob
->gl_pathc
== oldpathc
) {
187 return(WAPI_GLOB_NOMATCH
);
194 glob1(GDir
*dir
, gchar
*pattern
, gchar
*pattern_last
, wapi_glob_t
*pglob
,
195 size_t *limitp
, gboolean ignorecase
, gboolean unique
)
197 /* A null pathname is invalid -- POSIX 1003.1 sect. 2.4. */
200 return(glob3(dir
, pattern
, pattern_last
, pglob
, limitp
, ignorecase
,
204 static gboolean
contains (wapi_glob_t
*pglob
, const gchar
*name
)
209 if (pglob
->gl_pathv
!= NULL
) {
210 pp
= pglob
->gl_pathv
+ pglob
->gl_offs
;
211 for (i
= pglob
->gl_pathc
; i
--; ++pp
) {
213 if (!strcmp (*pp
, name
)) {
224 glob3(GDir
*dir
, gchar
*pattern
, gchar
*pattern_last
, wapi_glob_t
*pglob
,
225 size_t *limitp
, gboolean ignorecase
, gboolean unique
)
229 /* Search directory for matching names. */
230 while ((name
= g_dir_read_name(dir
))) {
231 if (!match(name
, pattern
, pattern
+ strlen (pattern
),
236 !contains (pglob
, name
)) {
237 globextend (name
, pglob
, limitp
);
246 * Extend the gl_pathv member of a wapi_glob_t structure to accommodate a new item,
247 * add the new item, and update gl_pathc.
249 * This assumes the BSD realloc, which only copies the block when its size
250 * crosses a power-of-two boundary; for v7 realloc, this would cause quadratic
253 * Return 0 if new item added, error code if memory couldn't be allocated.
255 * Invariant of the wapi_glob_t structure:
256 * Either gl_pathc is zero and gl_pathv is NULL; or gl_pathc > 0 and
257 * gl_pathv points to (gl_offs + gl_pathc + 1) items.
260 globextend(const gchar
*path
, wapi_glob_t
*pglob
, size_t *limitp
)
264 unsigned int newsize
, len
;
268 newsize
= sizeof(*pathv
) * (2 + pglob
->gl_pathc
+ pglob
->gl_offs
);
269 /* FIXME: Can just use realloc(). */
270 pathv
= (char **)(pglob
->gl_pathv
? g_realloc ((char *)pglob
->gl_pathv
, newsize
) :
273 if (pglob
->gl_pathv
) {
274 g_free (pglob
->gl_pathv
);
275 pglob
->gl_pathv
= NULL
;
277 return(WAPI_GLOB_NOSPACE
);
280 if (pglob
->gl_pathv
== NULL
&& pglob
->gl_offs
> 0) {
281 /* first time around -- clear initial gl_offs items */
282 pathv
+= pglob
->gl_offs
;
283 for (i
= pglob
->gl_offs
; --i
>= 0; )
286 pglob
->gl_pathv
= pathv
;
288 for (p
= path
; *p
++;)
290 len
= (size_t)(p
- path
);
292 if ((copy
= (char *)malloc(len
)) != NULL
) {
293 if (g_Ctoc(path
, copy
, len
)) {
295 return(WAPI_GLOB_NOSPACE
);
297 pathv
[pglob
->gl_offs
+ pglob
->gl_pathc
++] = copy
;
299 pathv
[pglob
->gl_offs
+ pglob
->gl_pathc
] = NULL
;
302 /* Broken on opensuse 11 */
303 if ((pglob
->gl_flags
& WAPI_GLOB_LIMIT
) &&
304 newsize
+ *limitp
>= ARG_MAX
) {
306 return(WAPI_GLOB_NOSPACE
);
310 return(copy
== NULL
? WAPI_GLOB_NOSPACE
: 0);
315 * pattern matching function for filenames. Each occurrence of the *
316 * pattern causes a recursion level.
319 match(const gchar
*name
, gchar
*pat
, gchar
*patend
, gboolean ignorecase
)
323 while (pat
< patend
) {
325 switch (c
& M_MASK
) {
330 if (match(name
, pat
, patend
, ignorecase
))
332 } while (*name
++ != EOS
);
340 if (g_ascii_tolower (*name
++) != g_ascii_tolower (c
))
350 return(*name
== EOS
);
353 /* Free allocated data belonging to a wapi_glob_t structure. */
355 _wapi_globfree(wapi_glob_t
*pglob
)
360 if (pglob
->gl_pathv
!= NULL
) {
361 pp
= pglob
->gl_pathv
+ pglob
->gl_offs
;
362 for (i
= pglob
->gl_pathc
; i
--; ++pp
)
365 g_free (pglob
->gl_pathv
);
366 pglob
->gl_pathv
= NULL
;
371 g_Ctoc(const gchar
*str
, char *buf
, unsigned int len
)
375 if ((*buf
++ = *str
++) == EOS
)
383 qprintf(const char *str
, Char
*s
)
387 (void)printf("%s:\n", str
);
389 (void)printf("%c", CHAR(*p
));
392 (void)printf("%c", *p
& M_PROTECT
? '"' : ' ');
395 (void)printf("%c", ismeta(*p
) ? '_' : ' ');