summaryrefslogtreecommitdiffstats
path: root/lib/glob.c
blob: 32f7afdce81b60fcc80106d8ee4ca3d518c2bfec (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
/* Copyright (C) 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Library General Public License for more details.

You should have received a copy of the GNU Library General Public
License along with this library; see the file COPYING.LIB.  If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA.  */

#include <common.h>
#include <errno.h>
#include <fs.h>
#include <linux/stat.h>
#include <malloc.h>
#include <xfuncs.h>
#include <fnmatch.h>
#include <qsort.h>
#define _GNU_SOURCE
#include <glob.h>

#ifdef CONFIG_GLOB

extern __ptr_t(*__glob_opendir_hook) __P((const char *directory));
extern void (*__glob_closedir_hook) __P((__ptr_t stream));
extern const char *(*__glob_readdir_hook) __P((__ptr_t stream));

static int glob_in_dir __P((const char *pattern, const char *directory,
			    int flags,
			    int (*errfunc) __P((const char *, int)),
			    glob_t * pglob));
static int prefix_array __P((const char *prefix, char **array, size_t n,
			     int add_slash));

#ifdef __GLOB64
extern int glob_pattern_p(const char *pattern, int quote);
#else
/* Return nonzero if PATTERN contains any metacharacters.
   Metacharacters can be quoted with backslashes if QUOTE is nonzero.  */
int glob_pattern_p(const char *pattern, int quote)
{
	const char *p;
	int open = 0;

	for (p = pattern; *p != '\0'; ++p)
		switch (*p) {
		case '?':
		case '*':
			return 1;

		case '\\':
			if (quote && p[1] != '\0')
				++p;
			break;

		case '[':
			open = 1;
			break;

		case ']':
			if (open)
				return 1;
			break;
		}

	return 0;
}
#endif

#ifdef CONFIG_GLOB_SORT
/* Do a collated comparison of A and B.  */
static int collated_compare(const void *a, const void *b)
{
	const char *const s1 = *(const char *const *)a;
	const char *const s2 = *(const char *const *)b;

	if (s1 == s2)
		return 0;
	if (s1 == NULL)
		return 1;
	if (s2 == NULL)
		return -1;
	return strcmp(s1, s2);
}
#endif

/* Do glob searching for PATTERN, placing results in PGLOB.
   The bits defined above may be set in FLAGS.
   If a directory cannot be opened or read and ERRFUNC is not nil,
   it is called with the pathname that caused the error, and the
   `errno' value from the failing call; if it returns non-zero
   `glob' returns GLOB_ABEND; if it returns zero, the error is ignored.
   If memory cannot be allocated for PGLOB, GLOB_NOSPACE is returned.
   Otherwise, `glob' returns zero.  */
int glob(const char *pattern, int flags,
		int (*errfunc) __P((const char *, int)), glob_t *pglob)
{
	const char *filename;
	char *dirname = NULL;
	size_t dirlen;
	int status;
	int oldcount;

	if (pattern == NULL || pglob == NULL || (flags & ~__GLOB_FLAGS) != 0) {
		errno = EINVAL;
		return -1;
	}

	/* Find the filename.  */
	filename = strrchr(pattern, '/');
	if (filename == NULL) {
		filename = pattern;
		dirname = strdup(".");
		dirlen = 0;
	} else if (filename == pattern) {
		/* "/pattern".  */
		dirname = strdup("/");
		dirlen = 1;
		++filename;
	} else {
		dirlen = filename - pattern;
		dirname = (char *)xmalloc(dirlen + 1);
		memcpy(dirname, pattern, dirlen);
		dirname[dirlen] = '\0';
		++filename;
	}

	if (filename[0] == '\0' && dirlen > 1) {
		/* "pattern/".  Expand "pattern", appending slashes.  */
		int val = glob(dirname, flags | GLOB_MARK, errfunc, pglob);
		if (val == 0)
			pglob->gl_flags =
			    (pglob->
			     gl_flags & ~GLOB_MARK) | (flags & GLOB_MARK);
		status = val;
		goto out;
	}

	if (!(flags & GLOB_APPEND)) {
		pglob->gl_pathc = 0;
		pglob->gl_pathv = NULL;
	}

	oldcount = pglob->gl_pathc;

	if (glob_pattern_p(dirname, !(flags & GLOB_NOESCAPE))) {
		/* The directory name contains metacharacters, so we
		   have to glob for the directory, and then glob for
		   the pattern in each directory found.  */
		glob_t dirs;
		register int i;
		status = glob(dirname,
			      ((flags &
				(GLOB_ERR | GLOB_NOCHECK | GLOB_NOESCAPE)) |
			       GLOB_NOSORT), errfunc, &dirs);
		if (status != 0)
			goto out;

		/* We have successfully globbed the preceding directory name.
		   For each name we found, call glob_in_dir on it and FILENAME,
		   appending the results to PGLOB.  */
		for (i = 0; i < dirs.gl_pathc; ++i) {
			int oldcount1;

#ifdef	SHELL
			{
				/* Make globbing interruptible in the bash shell. */
				extern int interrupt_state;

				if (interrupt_state) {
					globfree(&dirs);
					globfree(&files);
					status = GLOB_ABEND goto out;
				}
			}
#endif				/* SHELL.  */

			oldcount1 = pglob->gl_pathc;
			status = glob_in_dir(filename, dirs.gl_pathv[i],
					     (flags | GLOB_APPEND) &
					     ~GLOB_NOCHECK, errfunc, pglob);
			if (status == GLOB_NOMATCH) {
				/* No matches in this directory.  Try the next.  */
				continue;
			}

			if (status != 0) {
				globfree(pglob);
				goto out;
			}

			/* Stick the directory on the front of each name.  */
			prefix_array(dirs.gl_pathv[i],
					 &pglob->gl_pathv[oldcount1],
					 pglob->gl_pathc - oldcount1,
					 flags & GLOB_MARK);
		}

		globfree(&dirs);
		flags |= GLOB_MAGCHAR;

		if (pglob->gl_pathc == oldcount) {
			/* No matches.  */

			if (flags & GLOB_NOCHECK) {
				size_t len = strlen(pattern) + 1;
				char *patcopy = (char *)xmalloc(len);
				memcpy(patcopy, pattern, len);

				pglob->gl_pathv
				    = (char **)xrealloc(pglob->gl_pathv,
						       (pglob->gl_pathc +
							((flags & GLOB_DOOFFS) ?
							 pglob->gl_offs : 0) +
							1 + 1) *
						       sizeof(char *));

				if (flags & GLOB_DOOFFS)
					while (pglob->gl_pathc < pglob->gl_offs)
						pglob->gl_pathv[pglob->
								gl_pathc++] =
						    NULL;

				pglob->gl_pathv[pglob->gl_pathc++] = patcopy;
				pglob->gl_pathv[pglob->gl_pathc] = NULL;
				pglob->gl_flags = flags;
			} else {
				status = GLOB_NOMATCH;
				goto out;
			}
		}
	} else {
		status = glob_in_dir(filename, dirname, flags, errfunc, pglob);
		if (status != 0)
			goto out;

		if (dirlen > 0) {
			/* Stick the directory on the front of each name.  */
			prefix_array(dirname,
					 &pglob->gl_pathv[oldcount],
					 pglob->gl_pathc - oldcount,
					 flags & GLOB_MARK);
		}
	}

	if (flags & GLOB_MARK) {
		/* Append slashes to directory names.  glob_in_dir has already
		   allocated the extra character for us.  */
		int i;
		struct stat st;
		for (i = oldcount; i < pglob->gl_pathc; ++i)
			if (stat(pglob->gl_pathv[i], &st) == 0 &&
			    S_ISDIR(st.st_mode))
				strcat(pglob->gl_pathv[i], "/");
	}
#ifdef CONFIG_GLOB_SORT
	if (!(flags & GLOB_NOSORT))
		/* Sort the vector.  */
		qsort((__ptr_t) & pglob->gl_pathv[oldcount],
		      pglob->gl_pathc - oldcount,
		      sizeof(char *), collated_compare);
#endif
	status = 0;
out:
	free(dirname);

	return status;
}

/* Prepend DIRNAME to each of N members of ARRAY, replacing ARRAY's
   elements in place.  Return nonzero if out of memory, zero if successful.
   A slash is inserted between DIRNAME and each elt of ARRAY,
   unless DIRNAME is just "/".  Each old element of ARRAY is freed.
   If ADD_SLASH is non-zero, allocate one character more than
   necessary, so that a slash can be appended later.  */
static int prefix_array(const char *dirname, char **array, size_t n,
		int add_slash)
{
	register size_t i;
	size_t dirlen = strlen(dirname);

	if (dirlen == 1 && dirname[0] == '/')
		/* DIRNAME is just "/", so normal prepending would get us "//foo".
		   We want "/foo" instead, so don't prepend any chars from DIRNAME.  */
		dirlen = 0;

	for (i = 0; i < n; ++i) {
		size_t eltlen = strlen(array[i]) + 1;
		char *new =
		    (char *)xmalloc(dirlen + 1 + eltlen + (add_slash ? 1 : 0));

		memcpy(new, dirname, dirlen);
		new[dirlen] = '/';
		memcpy(&new[dirlen + 1], array[i], eltlen);
		free((__ptr_t) array[i]);
		array[i] = new;
	}

	return 0;
}

/* Like `glob', but PATTERN is a final pathname component,
   and matches are searched for in DIRECTORY.
   The GLOB_NOSORT bit in FLAGS is ignored.  No sorting is ever done.
   The GLOB_APPEND flag is assumed to be set (always appends).  */
static int glob_in_dir(const char *pattern, const char *directory,
		int flags, int (*errfunc) __P((const char *, int)), glob_t *pglob)
{
	__ptr_t stream = NULL;

	struct globlink {
		struct globlink *next;
		char *name;
	};
	struct globlink *names = NULL;
	size_t nfound = 0;
	int meta;

	meta = glob_pattern_p(pattern, !(flags & GLOB_NOESCAPE));

	if (meta)
		flags |= GLOB_MAGCHAR;

	if (meta)
		stream = opendir(directory);

	if (stream == NULL) {
		if ((errfunc != NULL && (*errfunc) (directory, errno)) ||
		    (flags & GLOB_ERR))
			return GLOB_ABORTED;
	}

	while (1) {
		const char *name;
		size_t len;

		struct dirent *d = readdir((DIR *) stream);
		if (d == NULL)
			break;
//		if (! (d->d_ino != 0))
//			continue;
		name = d->d_name;

		if ((!meta && strcmp(pattern, name) == 0)
		    || fnmatch(pattern, name,
			       (!(flags & GLOB_PERIOD) ? FNM_PERIOD : 0) |
			       ((flags & GLOB_NOESCAPE) ? FNM_NOESCAPE : 0)) == 0) {
			struct globlink *new =
			    (struct globlink *)xmalloc(sizeof(struct globlink));
			len = strlen(name);
			new->name = xmalloc(len + ((flags & GLOB_MARK) ? 1 : 0) + 1);
			memcpy((__ptr_t) new->name, name, len);
			new->name[len] = '\0';
			new->next = names;
			names = new;
			++nfound;
			if (!meta)
				break;
		}
	}

	if (nfound == 0 && (flags & GLOB_NOCHECK)) {
		size_t len = strlen(pattern);
		nfound = 1;
		names = (struct globlink *)xmalloc(sizeof(struct globlink));
		names->next = NULL;
		names->name =
		    (char *)xmalloc(len + (flags & GLOB_MARK ? 1 : 0) + 1);
		memcpy(names->name, pattern, len);
		names->name[len] = '\0';
	}

	pglob->gl_pathv
	    = (char **)xrealloc(pglob->gl_pathv,
			       (pglob->gl_pathc +
				((flags & GLOB_DOOFFS) ? pglob->gl_offs : 0) +
				nfound + 1) * sizeof(char *));

	if (flags & GLOB_DOOFFS)
		while (pglob->gl_pathc < pglob->gl_offs)
			pglob->gl_pathv[pglob->gl_pathc++] = NULL;

	while (names) {
		struct globlink *tmp;

		pglob->gl_pathv[pglob->gl_pathc++] = names->name;
		tmp = names;
		names = names->next;
		free(tmp);
	}
	pglob->gl_pathv[pglob->gl_pathc] = NULL;

	pglob->gl_flags = flags;

	{
		int save = errno;
		(void)closedir((DIR *) stream);
		errno = save;
	}
	return nfound == 0 ? GLOB_NOMATCH : 0;
}
#endif /* CONFIG_GLOB */

#ifdef CONFIG_FAKE_GLOB
/* Fake version of glob. We simply put the input string into
 * the gl_pathv array. Currently we don't need it as hush.c won't
 * call us if no glob support is available.
 */
int glob(pattern, flags, errfunc, pglob)
const char *pattern;
int flags;
int (*errfunc) __P((const char *, int));
glob_t *pglob;
{
	int elems, i;

	if (!(flags & GLOB_APPEND)) {
		pglob->gl_pathc = 0;
		pglob->gl_pathv = NULL;
	}

	elems = pglob->gl_pathc + 2;
	if (flags & GLOB_DOOFFS)
		elems += pglob->gl_offs;

	pglob->gl_pathv = xrealloc(pglob->gl_pathv, elems * sizeof(char *));

	if (flags & GLOB_DOOFFS)
		for (i = 0; i < pglob->gl_offs; i++)
			pglob->gl_pathv[i] = NULL;

	pglob->gl_pathv[pglob->gl_pathc] = strdup(pattern);
	pglob->gl_pathc++;
	pglob->gl_pathv[pglob->gl_pathc] = NULL;

	return 0;
}
#endif /* CONFIG_FAKE_GLOB */

/* Free storage allocated in PGLOB by a previous `glob' call.  */
void globfree(glob_t *pglob)
{
	if (pglob->gl_pathv != NULL) {
		int i = pglob->gl_flags & GLOB_DOOFFS ? pglob->gl_offs : 0;
		for (; i < pglob->gl_pathc; ++i)
			if (pglob->gl_pathv[i] != NULL)
				free((__ptr_t) pglob->gl_pathv[i]);
		free((__ptr_t) pglob->gl_pathv);
	}
}