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/param.h>
55 #include "wapi_glob.h"
65 #define M_QUOTE 0x8000
66 #define M_PROTECT 0x4000
68 #define M_ASCII 0x00ff
75 #define M_PROTECT 0x40
84 #define CHAR(c) ((gchar)((c)&M_ASCII))
85 #define META(c) ((gchar)((c)|M_QUOTE))
86 #define M_ALL META('*')
87 #define M_ONE META('?')
88 #define ismeta(c) (((c)&M_QUOTE) != 0)
91 static int g_Ctoc(const gchar *, char *, u_int);
92 static int glob0(GDir *dir, const gchar *, wapi_glob_t *, gboolean,
94 static int glob1(GDir *dir, gchar *, gchar *, wapi_glob_t *, size_t *,
96 static int glob3(GDir *dir, gchar *, gchar *, wapi_glob_t *, size_t *,
98 static int globextend(const gchar *, wapi_glob_t *, size_t *);
99 static int match(const gchar *, gchar *, gchar *, gboolean);
101 static void qprintf(const char *, Char *);
105 _wapi_glob(GDir *dir, const char *pattern, int flags, wapi_glob_t *pglob)
107 const u_char *patnext;
109 gchar *bufnext, *bufend, patbuf[MAXPATHLEN];
111 patnext = (u_char *) pattern;
112 if (!(flags & WAPI_GLOB_APPEND)) {
114 pglob->gl_pathv = NULL;
117 pglob->gl_flags = flags & ~WAPI_GLOB_MAGCHAR;
120 bufend = bufnext + MAXPATHLEN - 1;
122 /* Protect the quoted characters. */
123 while (bufnext < bufend && (c = *patnext++) != EOS)
125 if ((c = *patnext++) == EOS) {
129 *bufnext++ = c | M_PROTECT;
135 return glob0(dir, patbuf, pglob, flags & WAPI_GLOB_IGNORECASE,
136 flags & WAPI_GLOB_UNIQUE);
140 * The main glob() routine: compiles the pattern (optionally processing
141 * quotes), calls glob1() to do the real pattern matching, and finally
142 * sorts the list (unless unsorted operation is requested). Returns 0
143 * if things went well, nonzero if errors occurred. It is not an error
144 * to find no matches.
147 glob0(GDir *dir, const gchar *pattern, wapi_glob_t *pglob, gboolean ignorecase,
150 const gchar *qpatnext;
151 int c, err, oldpathc;
152 gchar *bufnext, patbuf[MAXPATHLEN];
156 oldpathc = pglob->gl_pathc;
159 /* We don't need to check for buffer overflow any more. */
160 while ((c = *qpatnext++) != EOS) {
163 pglob->gl_flags |= WAPI_GLOB_MAGCHAR;
167 pglob->gl_flags |= WAPI_GLOB_MAGCHAR;
168 /* collapse adjacent stars to one,
169 * to avoid exponential behavior
171 if (bufnext == patbuf || bufnext[-1] != M_ALL)
175 *bufnext++ = CHAR(c);
181 qprintf("glob0:", patbuf);
184 if ((err = glob1(dir, patbuf, patbuf+MAXPATHLEN-1, pglob, &limit,
185 ignorecase, unique)) != 0)
188 if (pglob->gl_pathc == oldpathc) {
189 return(WAPI_GLOB_NOMATCH);
196 glob1(GDir *dir, gchar *pattern, gchar *pattern_last, wapi_glob_t *pglob,
197 size_t *limitp, gboolean ignorecase, gboolean unique)
199 /* A null pathname is invalid -- POSIX 1003.1 sect. 2.4. */
202 return(glob3(dir, pattern, pattern_last, pglob, limitp, ignorecase,
206 static gboolean contains (wapi_glob_t *pglob, const gchar *name)
211 if (pglob->gl_pathv != NULL) {
212 pp = pglob->gl_pathv + pglob->gl_offs;
213 for (i = pglob->gl_pathc; i--; ++pp) {
215 if (!strcmp (*pp, name)) {
226 glob3(GDir *dir, gchar *pattern, gchar *pattern_last, wapi_glob_t *pglob,
227 size_t *limitp, gboolean ignorecase, gboolean unique)
231 /* Search directory for matching names. */
232 while ((name = g_dir_read_name(dir))) {
233 if (!match(name, pattern, pattern + strlen (pattern),
238 !contains (pglob, name)) {
239 globextend (name, pglob, limitp);
248 * Extend the gl_pathv member of a wapi_glob_t structure to accommodate a new item,
249 * add the new item, and update gl_pathc.
251 * This assumes the BSD realloc, which only copies the block when its size
252 * crosses a power-of-two boundary; for v7 realloc, this would cause quadratic
255 * Return 0 if new item added, error code if memory couldn't be allocated.
257 * Invariant of the wapi_glob_t structure:
258 * Either gl_pathc is zero and gl_pathv is NULL; or gl_pathc > 0 and
259 * gl_pathv points to (gl_offs + gl_pathc + 1) items.
262 globextend(const gchar *path, wapi_glob_t *pglob, size_t *limitp)
270 newsize = sizeof(*pathv) * (2 + pglob->gl_pathc + pglob->gl_offs);
271 pathv = pglob->gl_pathv ? realloc((char *)pglob->gl_pathv, newsize) :
274 if (pglob->gl_pathv) {
275 free(pglob->gl_pathv);
276 pglob->gl_pathv = NULL;
278 return(WAPI_GLOB_NOSPACE);
281 if (pglob->gl_pathv == NULL && pglob->gl_offs > 0) {
282 /* first time around -- clear initial gl_offs items */
283 pathv += pglob->gl_offs;
284 for (i = pglob->gl_offs; --i >= 0; )
287 pglob->gl_pathv = pathv;
289 for (p = path; *p++;)
291 len = (size_t)(p - path);
293 if ((copy = malloc(len)) != NULL) {
294 if (g_Ctoc(path, copy, len)) {
296 return(WAPI_GLOB_NOSPACE);
298 pathv[pglob->gl_offs + pglob->gl_pathc++] = copy;
300 pathv[pglob->gl_offs + pglob->gl_pathc] = NULL;
303 /* Broken on opensuse 11 */
304 if ((pglob->gl_flags & WAPI_GLOB_LIMIT) &&
305 newsize + *limitp >= ARG_MAX) {
307 return(WAPI_GLOB_NOSPACE);
311 return(copy == NULL ? WAPI_GLOB_NOSPACE : 0);
316 * pattern matching function for filenames. Each occurrence of the *
317 * pattern causes a recursion level.
320 match(const gchar *name, gchar *pat, gchar *patend, gboolean ignorecase)
324 while (pat < patend) {
326 switch (c & M_MASK) {
331 if (match(name, pat, patend, ignorecase))
333 } while (*name++ != EOS);
341 if (g_ascii_tolower (*name++) != g_ascii_tolower (c))
351 return(*name == EOS);
354 /* Free allocated data belonging to a wapi_glob_t structure. */
356 _wapi_globfree(wapi_glob_t *pglob)
361 if (pglob->gl_pathv != NULL) {
362 pp = pglob->gl_pathv + pglob->gl_offs;
363 for (i = pglob->gl_pathc; i--; ++pp)
366 free(pglob->gl_pathv);
367 pglob->gl_pathv = NULL;
372 g_Ctoc(const gchar *str, char *buf, u_int len)
376 if ((*buf++ = *str++) == EOS)
384 qprintf(const char *str, Char *s)
388 (void)printf("%s:\n", str);
390 (void)printf("%c", CHAR(*p));
393 (void)printf("%c", *p & M_PROTECT ? '"' : ' ');
396 (void)printf("%c", ismeta(*p) ? '_' : ' ');