support for mount by label (not yet tested)
Also adds findfs applet. Closes bug 1143.
This commit is contained in:
Denis Vlasenko
214
util-linux/volume_id/volume_id.c
Normal file
214
util-linux/volume_id/volume_id.c
Normal file
@@ -0,0 +1,214 @@
|
||||
/*
|
||||
* volume_id - reads filesystem label and uuid
|
||||
*
|
||||
* Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org>
|
||||
*
|
||||
* 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 2.1 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
*/
|
||||
|
||||
#include "volume_id_internal.h"
|
||||
|
||||
typedef int (*raid_probe_fptr)(struct volume_id *id, uint64_t off, uint64_t size);
|
||||
typedef int (*probe_fptr)(struct volume_id *id, uint64_t off);
|
||||
|
||||
static const raid_probe_fptr raid1[] = {
|
||||
#if ENABLE_FEATURE_VOLUMEID_LINUXRAID
|
||||
volume_id_probe_linux_raid,
|
||||
#endif
|
||||
#if ENABLE_FEATURE_VOLUMEID_ISWRAID
|
||||
volume_id_probe_intel_software_raid,
|
||||
#endif
|
||||
#if ENABLE_FEATURE_VOLUMEID_LSIRAID
|
||||
volume_id_probe_lsi_mega_raid,
|
||||
#endif
|
||||
#if ENABLE_FEATURE_VOLUMEID_VIARAID
|
||||
volume_id_probe_via_raid,
|
||||
#endif
|
||||
#if ENABLE_FEATURE_VOLUMEID_SILICONRAID
|
||||
volume_id_probe_silicon_medley_raid,
|
||||
#endif
|
||||
#if ENABLE_FEATURE_VOLUMEID_NVIDIARAID
|
||||
volume_id_probe_nvidia_raid,
|
||||
#endif
|
||||
#if ENABLE_FEATURE_VOLUMEID_PROMISERAID
|
||||
volume_id_probe_promise_fasttrack_raid,
|
||||
#endif
|
||||
#if ENABLE_FEATURE_VOLUMEID_HIGHPOINTRAID
|
||||
volume_id_probe_highpoint_45x_raid,
|
||||
#endif
|
||||
};
|
||||
|
||||
static const probe_fptr raid2[] = {
|
||||
#if ENABLE_FEATURE_VOLUMEID_LVM
|
||||
volume_id_probe_lvm1,
|
||||
volume_id_probe_lvm2,
|
||||
#endif
|
||||
#if ENABLE_FEATURE_VOLUMEID_HIGHPOINTRAID
|
||||
volume_id_probe_highpoint_37x_raid,
|
||||
#endif
|
||||
#if ENABLE_FEATURE_VOLUMEID_LUKS
|
||||
volume_id_probe_luks,
|
||||
#endif
|
||||
};
|
||||
|
||||
/* signature in the first block, only small buffer needed */
|
||||
static const probe_fptr fs1[] = {
|
||||
#if ENABLE_FEATURE_VOLUMEID_FAT
|
||||
volume_id_probe_vfat,
|
||||
#endif
|
||||
#if ENABLE_FEATURE_VOLUMEID_MAC
|
||||
volume_id_probe_mac_partition_map,
|
||||
#endif
|
||||
#if ENABLE_FEATURE_VOLUMEID_XFS
|
||||
volume_id_probe_xfs,
|
||||
#endif
|
||||
};
|
||||
|
||||
/* fill buffer with maximum */
|
||||
static const probe_fptr fs2[] = {
|
||||
#if ENABLE_FEATURE_VOLUMEID_LINUXSWAP
|
||||
volume_id_probe_linux_swap,
|
||||
#endif
|
||||
#if ENABLE_FEATURE_VOLUMEID_EXT
|
||||
volume_id_probe_ext,
|
||||
#endif
|
||||
#if ENABLE_FEATURE_VOLUMEID_REISERFS
|
||||
volume_id_probe_reiserfs,
|
||||
#endif
|
||||
#if ENABLE_FEATURE_VOLUMEID_JFS
|
||||
volume_id_probe_jfs,
|
||||
#endif
|
||||
#if ENABLE_FEATURE_VOLUMEID_UDF
|
||||
volume_id_probe_udf,
|
||||
#endif
|
||||
#if ENABLE_FEATURE_VOLUMEID_ISO9660
|
||||
volume_id_probe_iso9660,
|
||||
#endif
|
||||
#if ENABLE_FEATURE_VOLUMEID_HFS
|
||||
volume_id_probe_hfs_hfsplus,
|
||||
#endif
|
||||
#if ENABLE_FEATURE_VOLUMEID_UFS
|
||||
volume_id_probe_ufs,
|
||||
#endif
|
||||
#if ENABLE_FEATURE_VOLUMEID_NTFS
|
||||
volume_id_probe_ntfs,
|
||||
#endif
|
||||
#if ENABLE_FEATURE_VOLUMEID_CRAMFS
|
||||
volume_id_probe_cramfs,
|
||||
#endif
|
||||
#if ENABLE_FEATURE_VOLUMEID_ROMFS
|
||||
volume_id_probe_romfs,
|
||||
#endif
|
||||
#if ENABLE_FEATURE_VOLUMEID_HPFS
|
||||
volume_id_probe_hpfs,
|
||||
#endif
|
||||
#if ENABLE_FEATURE_VOLUMEID_SYSV
|
||||
volume_id_probe_sysv,
|
||||
#endif
|
||||
#if ENABLE_FEATURE_VOLUMEID_MINIX
|
||||
volume_id_probe_minix,
|
||||
#endif
|
||||
#if ENABLE_FEATURE_VOLUMEID_OCFS2
|
||||
volume_id_probe_ocfs2,
|
||||
#endif
|
||||
};
|
||||
|
||||
int volume_id_probe_all(struct volume_id *id, uint64_t off, uint64_t size)
|
||||
{
|
||||
int i;
|
||||
|
||||
if (id == NULL)
|
||||
return -EINVAL;
|
||||
|
||||
/* probe for raid first, cause fs probes may be successful on raid members */
|
||||
if (size) {
|
||||
for (i = 0; i < ARRAY_SIZE(raid1); i++)
|
||||
if (raid1[i](id, off, size) == 0)
|
||||
goto ret;
|
||||
}
|
||||
|
||||
for (i = 0; i < ARRAY_SIZE(raid2); i++)
|
||||
if (raid2[i](id, off) == 0)
|
||||
goto ret;
|
||||
|
||||
/* signature in the first block, only small buffer needed */
|
||||
for (i = 0; i < ARRAY_SIZE(fs1); i++)
|
||||
if (fs1[i](id, off) == 0)
|
||||
goto ret;
|
||||
|
||||
/* fill buffer with maximum */
|
||||
volume_id_get_buffer(id, 0, SB_BUFFER_SIZE);
|
||||
|
||||
for (i = 0; i < ARRAY_SIZE(fs2); i++)
|
||||
if (fs2[i](id, off) == 0)
|
||||
goto ret;
|
||||
return -1;
|
||||
|
||||
ret:
|
||||
/* If the filestystem in recognized, we free the allocated buffers,
|
||||
otherwise they will stay in place for the possible next probe call */
|
||||
volume_id_free_buffer(id);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* open volume by device node */
|
||||
struct volume_id *volume_id_open_node(const char *path)
|
||||
{
|
||||
struct volume_id *id;
|
||||
int fd;
|
||||
|
||||
fd = xopen(path, O_RDONLY);
|
||||
id = xzalloc(sizeof(struct volume_id));
|
||||
id->fd = fd;
|
||||
///* close fd on device close */
|
||||
//id->fd_close = 1;
|
||||
|
||||
return id;
|
||||
}
|
||||
|
||||
#ifdef UNUSED
|
||||
/* open volume by major/minor */
|
||||
struct volume_id *volume_id_open_dev_t(dev_t devt)
|
||||
{
|
||||
struct volume_id *id;
|
||||
char *tmp_node[VOLUME_ID_PATH_MAX];
|
||||
|
||||
tmp_node = xasprintf("/dev/.volume_id-%u-%u-%u",
|
||||
(unsigned)getpid(), (unsigned)major(devt), (unsigned)minor(devt));
|
||||
|
||||
/* create temporary node to open block device */
|
||||
unlink(tmp_node);
|
||||
if (mknod(tmp_node, (S_IFBLK | 0600), devt) != 0)
|
||||
bb_perror_msg_and_die("cannot mknod(%s)", tmp_node);
|
||||
|
||||
id = volume_id_open_node(tmp_node);
|
||||
unlink(tmp_node);
|
||||
free(tmp_node);
|
||||
return id;
|
||||
}
|
||||
#endif
|
||||
|
||||
void free_volume_id(struct volume_id *id)
|
||||
{
|
||||
if (id == NULL)
|
||||
return;
|
||||
|
||||
//if (id->fd_close != 0) - always true
|
||||
close(id->fd);
|
||||
volume_id_free_buffer(id);
|
||||
free(id->partitions);
|
||||
free(id);
|
||||
}
|
||||
Reference in New Issue
Block a user