summaryrefslogtreecommitdiff
path: root/posix/bug-glob2.c
blob: 8e21deb658185c831e2221d358793434276f2e25 (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
/* Test glob memory management.
   for the filesystem access functions.
   Copyright (C) 2001-2014 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#include <errno.h>
#include <error.h>
#include <dirent.h>
#include <glob.h>
#include <mcheck.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>

// #define DEBUG
#ifdef DEBUG
# define PRINTF(fmt, args...) \
  do					\
    {					\
      int save_errno = errno;		\
      printf (fmt, ##args);		\
      errno = save_errno;		\
    } while (0)
#else
# define PRINTF(fmt, args...)
#endif


static struct
{
  const char *name;
  int level;
  int type;
  mode_t mode;
} filesystem[] =
{
  { ".", 1, DT_DIR, 0755 },
  { "..", 1, DT_DIR, 0755 },
  { "dir", 1, DT_DIR, 0755 },
    { ".", 2, DT_DIR, 0755 },
    { "..", 2, DT_DIR, 0755 },
    { "readable", 2, DT_DIR, 0755 },
      { ".", 3, DT_DIR, 0755 },
      { "..", 3, DT_DIR, 0755 },
      { "a", 3, DT_REG, 0644 },
    { "unreadable", 2, DT_DIR, 0111 },
      { ".", 3, DT_DIR, 0111 },
      { "..", 3, DT_DIR, 0755 },
      { "a", 3, DT_REG, 0644 },
    { "zz-readable", 2, DT_DIR, 0755 },
      { ".", 3, DT_DIR, 0755 },
      { "..", 3, DT_DIR, 0755 },
      { "a", 3, DT_REG, 0644 }
};
#define nfiles (sizeof (filesystem) / sizeof (filesystem[0]))


typedef struct
{
  int level;
  int idx;
  struct dirent d;
  char room_for_dirent[NAME_MAX];
} my_DIR;


static long int
find_file (const char *s)
{
  int level = 1;
  long int idx = 0;

  if (strcmp (s, ".") == 0)
    return 0;

  if (s[0] == '.' && s[1] == '/')
    s += 2;

  while (*s != '\0')
    {
      char *endp = strchrnul (s, '/');

      PRINTF ("looking for %.*s, level %d\n", (int) (endp - s), s, level);

      while (idx < nfiles && filesystem[idx].level >= level)
	{
	  if (filesystem[idx].level == level
	      && memcmp (s, filesystem[idx].name, endp - s) == 0
	      && filesystem[idx].name[endp - s] == '\0')
	    break;
	  ++idx;
	}

      if (idx == nfiles || filesystem[idx].level < level)
	{
	  errno = ENOENT;
	  return -1;
	}

      if (*endp == '\0')
	return idx + 1;

      if (filesystem[idx].type != DT_DIR
	  && (idx + 1 >= nfiles
	      || filesystem[idx].level >= filesystem[idx + 1].level))
	{
	  errno = ENOTDIR;
	  return -1;
	}

      ++idx;

      s = endp + 1;
      ++level;
    }

  errno = ENOENT;
  return -1;
}


static void *
my_opendir (const char *s)
{
  long int idx = find_file (s);
  my_DIR *dir;

  if (idx == -1)
    {
      PRINTF ("my_opendir(\"%s\") == NULL (%m)\n", s);
      return NULL;
    }

  if ((filesystem[idx].mode & 0400) == 0)
    {
      errno = EACCES;
      PRINTF ("my_opendir(\"%s\") == NULL (%m)\n", s);
      return NULL;
    }

  dir = (my_DIR *) malloc (sizeof (my_DIR));
  if (dir == NULL)
    {
      printf ("cannot allocate directory handle: %m\n");
      exit (EXIT_FAILURE);
    }

  dir->level = filesystem[idx].level;
  dir->idx = idx;

  PRINTF ("my_opendir(\"%s\") == { level: %d, idx: %ld }\n",
	  s, filesystem[idx].level, idx);

  return dir;
}


static struct dirent *
my_readdir (void *gdir)
{
  my_DIR *dir = gdir;

  if (dir->idx == -1)
    {
      PRINTF ("my_readdir ({ level: %d, idx: %ld }) = NULL\n",
	      dir->level, (long int) dir->idx);
      return NULL;
    }

  while (dir->idx < nfiles && filesystem[dir->idx].level > dir->level)
    ++dir->idx;

  if (dir->idx == nfiles || filesystem[dir->idx].level < dir->level)
    {
      dir->idx = -1;
      PRINTF ("my_readdir ({ level: %d, idx: %ld }) = NULL\n",
	      dir->level, (long int) dir->idx);
      return NULL;
    }

  dir->d.d_ino = dir->idx;

#ifdef _DIRENT_HAVE_D_TYPE
  dir->d.d_type = filesystem[dir->idx].type;
#endif

  strcpy (dir->d.d_name, filesystem[dir->idx].name);

#ifdef _DIRENT_HAVE_D_TYPE
  PRINTF ("my_readdir ({ level: %d, idx: %ld }) = { d_ino: %ld, d_type: %d, d_name: \"%s\" }\n",
	  dir->level, (long int) dir->idx, dir->d.d_ino, dir->d.d_type,
	  dir->d.d_name);
#else
  PRINTF ("my_readdir ({ level: %d, idx: %ld }) = { d_ino: %ld, d_name: \"%s\" }\n",
	  dir->level, (long int) dir->idx, dir->d.d_ino,
	  dir->d.d_name);
#endif

  ++dir->idx;

  return &dir->d;
}


static void
my_closedir (void *dir)
{
  PRINTF ("my_closedir ()\n");
  free (dir);
}


/* We use this function for lstat as well since we don't have any.  */
static int
my_stat (const char *name, struct stat *st)
{
  long int idx = find_file (name);

  if (idx == -1)
    {
      PRINTF ("my_stat (\"%s\", ...) = -1 (%m)\n", name);
      return -1;
    }

  memset (st, '\0', sizeof (*st));

  if (filesystem[idx].type == DT_UNKNOWN)
    st->st_mode = DTTOIF (idx + 1 < nfiles
			  && filesystem[idx].level < filesystem[idx + 1].level
			  ? DT_DIR : DT_REG) | filesystem[idx].mode;
  else
    st->st_mode = DTTOIF (filesystem[idx].type) | filesystem[idx].mode;

  PRINTF ("my_stat (\"%s\", { st_mode: %o }) = 0\n", name, st->st_mode);

  return 0;
}


static void
init_glob_altdirfuncs (glob_t *pglob)
{
  pglob->gl_closedir = my_closedir;
  pglob->gl_readdir = my_readdir;
  pglob->gl_opendir = my_opendir;
  pglob->gl_lstat = my_stat;
  pglob->gl_stat = my_stat;
}


int
do_test (void)
{
  mtrace ();

  glob_t gl;
  memset (&gl, 0, sizeof (gl));
  init_glob_altdirfuncs (&gl);

  if (glob ("dir/*able/*", GLOB_ERR | GLOB_ALTDIRFUNC, NULL, &gl)
      != GLOB_ABORTED)
    {
      puts ("glob did not fail with GLOB_ABORTED");
      exit (EXIT_FAILURE);
    }

  globfree (&gl);

  memset (&gl, 0, sizeof (gl));
  init_glob_altdirfuncs (&gl);

  gl.gl_offs = 3;
  if (glob ("dir2/*", GLOB_DOOFFS, NULL, &gl) != GLOB_NOMATCH)
    {
      puts ("glob did not fail with GLOB_NOMATCH");
      exit (EXIT_FAILURE);
    }

  globfree (&gl);

  muntrace ();

  return 0;
}

#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"