glibc/posix/bug-glob2.c

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/* Test glob memory management.
for the filesystem access functions.
Copyright (C) 2001-2013 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"