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/* libguestfs
* Copyright (C) 2010 Red Hat Inc.
*
* This 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 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; 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 <stdint.h>
#include <inttypes.h>
#include <unistd.h>
#include <string.h>
#include <sys/stat.h>
#include "guestfs.h"
#include "guestfs-internal.h"
#include "guestfs-internal-actions.h"
#include "guestfs_protocol.h"
/* List filesystems.
*
* The current implementation just uses guestfs_vfs_type and doesn't
* try mounting anything, but we reserve the right in future to try
* mounting filesystems.
*/
static void remove_from_list (char **list, const char *item);
static void check_with_vfs_type (guestfs_h *g, const char *dev, char ***ret, size_t *ret_size);
char **
guestfs__list_filesystems (guestfs_h *g)
{
size_t i;
char **ret;
size_t ret_size;
ret = safe_malloc (g, sizeof (char *));
ret[0] = NULL;
ret_size = 0;
/* Look to see if any devices directly contain filesystems
* (RHBZ#590167). However vfs-type will fail to tell us anything
* useful about devices which just contain partitions, so we also
* get the list of partitions and exclude the corresponding devices
* by using part-to-dev.
*/
char **devices;
devices = guestfs_list_devices (g);
if (devices == NULL) {
guestfs___free_string_list (ret);
return NULL;
}
char **partitions;
partitions = guestfs_list_partitions (g);
if (partitions == NULL) {
guestfs___free_string_list (devices);
guestfs___free_string_list (ret);
return NULL;
}
for (i = 0; partitions[i] != NULL; ++i) {
char *dev = guestfs_part_to_dev (g, partitions[i]);
if (dev)
remove_from_list (devices, dev);
free (dev);
}
/* Use vfs-type to check for filesystems on devices. */
for (i = 0; devices[i] != NULL; ++i)
check_with_vfs_type (g, devices[i], &ret, &ret_size);
guestfs___free_string_list (devices);
/* Use vfs-type to check for filesystems on partitions. */
for (i = 0; partitions[i] != NULL; ++i)
check_with_vfs_type (g, partitions[i], &ret, &ret_size);
guestfs___free_string_list (partitions);
if (guestfs___feature_available (g, "lvm2")) {
/* Use vfs-type to check for filesystems on LVs. */
char **lvs;
lvs = guestfs_lvs (g);
if (lvs == NULL) {
guestfs___free_string_list (ret);
return NULL;
}
for (i = 0; lvs[i] != NULL; ++i)
check_with_vfs_type (g, lvs[i], &ret, &ret_size);
guestfs___free_string_list (lvs);
}
return ret;
}
/* If 'item' occurs in 'list', remove and free it. */
static void
remove_from_list (char **list, const char *item)
{
size_t i;
for (i = 0; list[i] != NULL; ++i)
if (STREQ (list[i], item)) {
free (list[i]);
for (; list[i+1] != NULL; ++i)
list[i] = list[i+1];
list[i] = NULL;
return;
}
}
/* Use vfs-type to look for a filesystem of some sort on 'dev'.
* Apart from some types which we ignore, add the result to the
* 'ret' string list.
*/
static void
check_with_vfs_type (guestfs_h *g, const char *device,
char ***ret, size_t *ret_size)
{
char *v;
guestfs_error_handler_cb old_error_cb = g->error_cb;
g->error_cb = NULL;
char *vfs_type = guestfs_vfs_type (g, device);
g->error_cb = old_error_cb;
if (!vfs_type)
v = safe_strdup (g, "unknown");
else {
/* Ignore all "*_member" strings. In libblkid these are returned
* for things which are members of some RAID or LVM set, most
* importantly "LVM2_member" which is a PV.
*/
size_t n = strlen (vfs_type);
if (n >= 7 && STREQ (&vfs_type[n-7], "_member")) {
free (vfs_type);
return;
}
/* Ignore LUKS-encrypted partitions. These are also containers. */
if (STREQ (vfs_type, "crypto_LUKS")) {
free (vfs_type);
return;
}
v = vfs_type;
}
/* Extend the return array. */
size_t i = *ret_size;
*ret_size += 2;
*ret = safe_realloc (g, *ret, (*ret_size + 1) * sizeof (char *));
(*ret)[i] = safe_strdup (g, device);
(*ret)[i+1] = v;
(*ret)[i+2] = NULL;
}
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