mirror of
https://github.com/libguestfs/libguestfs.git
synced 2026-03-22 07:03:38 +00:00
ef107448e8
This adds an extra optional boolean 'followsymlinks' flag to those 6 is-* APIs. If the flag is true, then symlinks are followed, ie. we use stat instead of lstat in the test. For the rationale behind this change, see: https://bugzilla.redhat.com/show_bug.cgi?id=974489
169 lines
3.7 KiB
C
169 lines
3.7 KiB
C
/* libguestfs - the guestfsd daemon
|
|
* Copyright (C) 2010-2013 Red Hat Inc.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*/
|
|
|
|
#include <config.h>
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
|
|
#include "guestfs_protocol.h"
|
|
#include "daemon.h"
|
|
#include "actions.h"
|
|
|
|
int
|
|
do_exists (const char *path)
|
|
{
|
|
int r;
|
|
|
|
CHROOT_IN;
|
|
r = access (path, F_OK);
|
|
CHROOT_OUT;
|
|
|
|
return r == 0;
|
|
}
|
|
|
|
static int get_mode (const char *path, mode_t *mode, int followsymlinks);
|
|
|
|
/* Takes optional arguments, consult optargs_bitmask. */
|
|
int
|
|
do_is_file (const char *path, int followsymlinks)
|
|
{
|
|
mode_t mode;
|
|
int r;
|
|
|
|
if (!(optargs_bitmask & GUESTFS_IS_FILE_FOLLOWSYMLINKS_BITMASK))
|
|
followsymlinks = 0;
|
|
|
|
r = get_mode (path, &mode, followsymlinks);
|
|
if (r <= 0) return r;
|
|
return S_ISREG (mode);
|
|
}
|
|
|
|
/* Takes optional arguments, consult optargs_bitmask. */
|
|
int
|
|
do_is_dir (const char *path, int followsymlinks)
|
|
{
|
|
mode_t mode;
|
|
int r;
|
|
|
|
if (!(optargs_bitmask & GUESTFS_IS_DIR_FOLLOWSYMLINKS_BITMASK))
|
|
followsymlinks = 0;
|
|
|
|
r = get_mode (path, &mode, followsymlinks);
|
|
if (r <= 0) return r;
|
|
return S_ISDIR (mode);
|
|
}
|
|
|
|
/* Takes optional arguments, consult optargs_bitmask. */
|
|
int
|
|
do_is_chardev (const char *path, int followsymlinks)
|
|
{
|
|
mode_t mode;
|
|
int r;
|
|
|
|
if (!(optargs_bitmask & GUESTFS_IS_CHARDEV_FOLLOWSYMLINKS_BITMASK))
|
|
followsymlinks = 0;
|
|
|
|
r = get_mode (path, &mode, followsymlinks);
|
|
if (r <= 0) return r;
|
|
return S_ISCHR (mode);
|
|
}
|
|
|
|
/* Takes optional arguments, consult optargs_bitmask. */
|
|
int
|
|
do_is_blockdev (const char *path, int followsymlinks)
|
|
{
|
|
mode_t mode;
|
|
int r;
|
|
|
|
if (!(optargs_bitmask & GUESTFS_IS_BLOCKDEV_FOLLOWSYMLINKS_BITMASK))
|
|
followsymlinks = 0;
|
|
|
|
r = get_mode (path, &mode, followsymlinks);
|
|
if (r <= 0) return r;
|
|
return S_ISBLK (mode);
|
|
}
|
|
|
|
/* Takes optional arguments, consult optargs_bitmask. */
|
|
int
|
|
do_is_fifo (const char *path, int followsymlinks)
|
|
{
|
|
mode_t mode;
|
|
int r;
|
|
|
|
if (!(optargs_bitmask & GUESTFS_IS_FIFO_FOLLOWSYMLINKS_BITMASK))
|
|
followsymlinks = 0;
|
|
|
|
r = get_mode (path, &mode, followsymlinks);
|
|
if (r <= 0) return r;
|
|
return S_ISFIFO (mode);
|
|
}
|
|
|
|
int
|
|
do_is_symlink (const char *path)
|
|
{
|
|
mode_t mode;
|
|
int r;
|
|
|
|
r = get_mode (path, &mode, 0);
|
|
if (r <= 0) return r;
|
|
return S_ISLNK (mode);
|
|
}
|
|
|
|
/* Takes optional arguments, consult optargs_bitmask. */
|
|
int
|
|
do_is_socket (const char *path, int followsymlinks)
|
|
{
|
|
mode_t mode;
|
|
int r;
|
|
|
|
if (!(optargs_bitmask & GUESTFS_IS_SOCKET_FOLLOWSYMLINKS_BITMASK))
|
|
followsymlinks = 0;
|
|
|
|
r = get_mode (path, &mode, followsymlinks);
|
|
if (r <= 0) return r;
|
|
return S_ISSOCK (mode);
|
|
}
|
|
|
|
static int
|
|
get_mode (const char *path, mode_t *mode, int followsymlinks)
|
|
{
|
|
int r;
|
|
struct stat buf;
|
|
|
|
CHROOT_IN;
|
|
r = (!followsymlinks ? lstat : stat) (path, &buf);
|
|
CHROOT_OUT;
|
|
|
|
if (r == -1) {
|
|
if (errno != ENOENT && errno != ENOTDIR) {
|
|
reply_with_perror ("stat: %s", path);
|
|
return -1;
|
|
}
|
|
else
|
|
return 0; /* Doesn't exist, means return false. */
|
|
}
|
|
|
|
*mode = buf.st_mode;
|
|
return 1;
|
|
}
|