posix/bug-glob2.c

   1 /* Test glob memory management.
   2    for the filesystem access functions.
   3    Copyright (C) 2001-2015 Free Software Foundation, Inc.
   4    This file is part of the GNU C Library.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <errno.h>
  21 #include <error.h>
  22 #include <dirent.h>
  23 #include <glob.h>
  24 #include <mcheck.h>
  25 #include <stdlib.h>
  26 #include <stdio.h>
  27 #include <string.h>
  28 #include <sys/stat.h>
  29
  30 // #define DEBUG
  31 #ifdef DEBUG
  32 # define PRINTF(fmt, args...) \
  33   do                                    \
  34     {                                   \
  35       int save_errno = errno;           \
  36       printf (fmt, ##args);             \
  37       errno = save_errno;               \
  38     } while (0)
  39 #else
  40 # define PRINTF(fmt, args...)
  41 #endif
  42
  43
  44 static struct
  45 {
  46   const char *name;
  47   int level;
  48   int type;
  49   mode_t mode;
  50 } filesystem[] =
  51 {
  52   { ".", 1, DT_DIR, 0755 },
  53   { "..", 1, DT_DIR, 0755 },
  54   { "dir", 1, DT_DIR, 0755 },
  55     { ".", 2, DT_DIR, 0755 },
  56     { "..", 2, DT_DIR, 0755 },
  57     { "readable", 2, DT_DIR, 0755 },
  58       { ".", 3, DT_DIR, 0755 },
  59       { "..", 3, DT_DIR, 0755 },
  60       { "a", 3, DT_REG, 0644 },
  61     { "unreadable", 2, DT_DIR, 0111 },
  62       { ".", 3, DT_DIR, 0111 },
  63       { "..", 3, DT_DIR, 0755 },
  64       { "a", 3, DT_REG, 0644 },
  65     { "zz-readable", 2, DT_DIR, 0755 },
  66       { ".", 3, DT_DIR, 0755 },
  67       { "..", 3, DT_DIR, 0755 },
  68       { "a", 3, DT_REG, 0644 }
  69 };
  70 #define nfiles (sizeof (filesystem) / sizeof (filesystem[0]))
  71
  72
  73 typedef struct
  74 {
  75   int level;
  76   int idx;
  77   struct dirent d;
  78   char room_for_dirent[NAME_MAX];
  79 } my_DIR;
  80
  81
  82 static long int
  83 find_file (const char *s)
  84 {
  85   int level = 1;
  86   long int idx = 0;
  87
  88   if (strcmp (s, ".") == 0)
  89     return 0;
  90
  91   if (s[0] == '.' && s[1] == '/')
  92     s += 2;
  93
  94   while (*s != '\0')
  95     {
  96       char *endp = strchrnul (s, '/');
  97
  98       PRINTF ("looking for %.*s, level %d\n", (int) (endp - s), s, level);
  99
 100       while (idx < nfiles && filesystem[idx].level >= level)
 101         {
 102           if (filesystem[idx].level == level
 103               && memcmp (s, filesystem[idx].name, endp - s) == 0
 104               && filesystem[idx].name[endp - s] == '\0')
 105             break;
 106           ++idx;
 107         }
 108
 109       if (idx == nfiles || filesystem[idx].level < level)
 110         {
 111           errno = ENOENT;
 112           return -1;
 113         }
 114
 115       if (*endp == '\0')
 116         return idx + 1;
 117
 118       if (filesystem[idx].type != DT_DIR
 119           && (idx + 1 >= nfiles
 120               || filesystem[idx].level >= filesystem[idx + 1].level))
 121         {
 122           errno = ENOTDIR;
 123           return -1;
 124         }
 125
 126       ++idx;
 127
 128       s = endp + 1;
 129       ++level;
 130     }
 131
 132   errno = ENOENT;
 133   return -1;
 134 }
 135
 136
 137 static void *
 138 my_opendir (const char *s)
 139 {
 140   long int idx = find_file (s);
 141   my_DIR *dir;
 142
 143   if (idx == -1)
 144     {
 145       PRINTF ("my_opendir(\"%s\") == NULL (%m)\n", s);
 146       return NULL;
 147     }
 148
 149   if ((filesystem[idx].mode & 0400) == 0)
 150     {
 151       errno = EACCES;
 152       PRINTF ("my_opendir(\"%s\") == NULL (%m)\n", s);
 153       return NULL;
 154     }
 155
 156   dir = (my_DIR *) malloc (sizeof (my_DIR));
 157   if (dir == NULL)
 158     {
 159       printf ("cannot allocate directory handle: %m\n");
 160       exit (EXIT_FAILURE);
 161     }
 162
 163   dir->level = filesystem[idx].level;
 164   dir->idx = idx;
 165
 166   PRINTF ("my_opendir(\"%s\") == { level: %d, idx: %ld }\n",
 167           s, filesystem[idx].level, idx);
 168
 169   return dir;
 170 }
 171
 172
 173 static struct dirent *
 174 my_readdir (void *gdir)
 175 {
 176   my_DIR *dir = gdir;
 177
 178   if (dir->idx == -1)
 179     {
 180       PRINTF ("my_readdir ({ level: %d, idx: %ld }) = NULL\n",
 181               dir->level, (long int) dir->idx);
 182       return NULL;
 183     }
 184
 185   while (dir->idx < nfiles && filesystem[dir->idx].level > dir->level)
 186     ++dir->idx;
 187
 188   if (dir->idx == nfiles || filesystem[dir->idx].level < dir->level)
 189     {
 190       dir->idx = -1;
 191       PRINTF ("my_readdir ({ level: %d, idx: %ld }) = NULL\n",
 192               dir->level, (long int) dir->idx);
 193       return NULL;
 194     }
 195
 196   dir->d.d_ino = dir->idx;
 197
 198 #ifdef _DIRENT_HAVE_D_TYPE
 199   dir->d.d_type = filesystem[dir->idx].type;
 200 #endif
 201
 202   strcpy (dir->d.d_name, filesystem[dir->idx].name);
 203
 204 #ifdef _DIRENT_HAVE_D_TYPE
 205   PRINTF ("my_readdir ({ level: %d, idx: %ld }) = { d_ino: %ld, d_type: %d, d_name: \"%s\" }\n",
 206           dir->level, (long int) dir->idx, dir->d.d_ino, dir->d.d_type,
 207           dir->d.d_name);
 208 #else
 209   PRINTF ("my_readdir ({ level: %d, idx: %ld }) = { d_ino: %ld, d_name: \"%s\" }\n",
 210           dir->level, (long int) dir->idx, dir->d.d_ino,
 211           dir->d.d_name);
 212 #endif
 213
 214   ++dir->idx;
 215
 216   return &dir->d;
 217 }
 218
 219
 220 static void
 221 my_closedir (void *dir)
 222 {
 223   PRINTF ("my_closedir ()\n");
 224   free (dir);
 225 }
 226
 227
 228 /* We use this function for lstat as well since we don't have any.  */
 229 static int
 230 my_stat (const char *name, struct stat *st)
 231 {
 232   long int idx = find_file (name);
 233
 234   if (idx == -1)
 235     {
 236       PRINTF ("my_stat (\"%s\", ...) = -1 (%m)\n", name);
 237       return -1;
 238     }
 239
 240   memset (st, '\0', sizeof (*st));
 241
 242   if (filesystem[idx].type == DT_UNKNOWN)
 243     st->st_mode = DTTOIF (idx + 1 < nfiles
 244                           && filesystem[idx].level < filesystem[idx + 1].level
 245                           ? DT_DIR : DT_REG) | filesystem[idx].mode;
 246   else
 247     st->st_mode = DTTOIF (filesystem[idx].type) | filesystem[idx].mode;
 248
 249   PRINTF ("my_stat (\"%s\", { st_mode: %o }) = 0\n", name, st->st_mode);
 250
 251   return 0;
 252 }
 253
 254
 255 static void
 256 init_glob_altdirfuncs (glob_t *pglob)
 257 {
 258   pglob->gl_closedir = my_closedir;
 259   pglob->gl_readdir = my_readdir;
 260   pglob->gl_opendir = my_opendir;
 261   pglob->gl_lstat = my_stat;
 262   pglob->gl_stat = my_stat;
 263 }
 264
 265
 266 int
 267 do_test (void)
 268 {
 269   mtrace ();
 270
 271   glob_t gl;
 272   memset (&gl, 0, sizeof (gl));
 273   init_glob_altdirfuncs (&gl);
 274
 275   if (glob ("dir/*able/*", GLOB_ERR | GLOB_ALTDIRFUNC, NULL, &gl)
 276       != GLOB_ABORTED)
 277     {
 278       puts ("glob did not fail with GLOB_ABORTED");
 279       exit (EXIT_FAILURE);
 280     }
 281
 282   globfree (&gl);
 283
 284   memset (&gl, 0, sizeof (gl));
 285   init_glob_altdirfuncs (&gl);
 286
 287   gl.gl_offs = 3;
 288   if (glob ("dir2/*", GLOB_DOOFFS, NULL, &gl) != GLOB_NOMATCH)
 289     {
 290       puts ("glob did not fail with GLOB_NOMATCH");
 291       exit (EXIT_FAILURE);
 292     }
 293
 294   globfree (&gl);
 295
 296   muntrace ();
 297
 298   return 0;
 299 }
 300
 301 #define TEST_FUNCTION do_test ()
 302 #include "../test-skeleton.c"