1 /* $OpenBSD: glob.c,v 1.26 2005/11/28 17:50:12 deraadt Exp $ */
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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 pathv = pglob->gl_pathv ? realloc((char *)pglob->gl_pathv, newsize) :
272 if (pglob->gl_pathv) {
273 free(pglob->gl_pathv);
274 pglob->gl_pathv = NULL;
276 return(WAPI_GLOB_NOSPACE);
279 if (pglob->gl_pathv == NULL && pglob->gl_offs > 0) {
280 /* first time around -- clear initial gl_offs items */
281 pathv += pglob->gl_offs;
282 for (i = pglob->gl_offs; --i >= 0; )
285 pglob->gl_pathv = pathv;
287 for (p = path; *p++;)
289 len = (size_t)(p - path);
291 if ((copy = malloc(len)) != NULL) {
292 if (g_Ctoc(path, copy, len)) {
294 return(WAPI_GLOB_NOSPACE);
296 pathv[pglob->gl_offs + pglob->gl_pathc++] = copy;
298 pathv[pglob->gl_offs + pglob->gl_pathc] = NULL;
301 /* Broken on opensuse 11 */
302 if ((pglob->gl_flags & WAPI_GLOB_LIMIT) &&
303 newsize + *limitp >= ARG_MAX) {
305 return(WAPI_GLOB_NOSPACE);
309 return(copy == NULL ? WAPI_GLOB_NOSPACE : 0);
314 * pattern matching function for filenames. Each occurrence of the *
315 * pattern causes a recursion level.
318 match(const gchar *name, gchar *pat, gchar *patend, gboolean ignorecase)
322 while (pat < patend) {
324 switch (c & M_MASK) {
329 if (match(name, pat, patend, ignorecase))
331 } while (*name++ != EOS);
339 if (g_ascii_tolower (*name++) != g_ascii_tolower (c))
349 return(*name == EOS);
352 /* Free allocated data belonging to a wapi_glob_t structure. */
354 _wapi_globfree(wapi_glob_t *pglob)
359 if (pglob->gl_pathv != NULL) {
360 pp = pglob->gl_pathv + pglob->gl_offs;
361 for (i = pglob->gl_pathc; i--; ++pp)
364 free(pglob->gl_pathv);
365 pglob->gl_pathv = NULL;
370 g_Ctoc(const gchar *str, char *buf, unsigned int len)
374 if ((*buf++ = *str++) == EOS)
382 qprintf(const char *str, Char *s)
386 (void)printf("%s:\n", str);
388 (void)printf("%c", CHAR(*p));
391 (void)printf("%c", *p & M_PROTECT ? '"' : ' ');
394 (void)printf("%c", ismeta(*p) ? '_' : ' ');