2 * volume_id - reads filesystem label and uuid
4 * Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org>
6 * This 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.
11 * This 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.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
38 #include <asm/types.h>
40 #include "volume_id.h"
45 #include "reiserfs/reiserfs.h"
51 #include "ntfs/ntfs.h"
52 #include "iso9660/iso9660.h"
54 #include "highpoint/highpoint.h"
55 #include "linux_swap/linux_swap.h"
56 #include "linux_raid/linux_raid.h"
58 #include "cramfs/cramfs.h"
59 #include "hpfs/hpfs.h"
60 #include "romfs/romfs.h"
62 #include "msdos/msdos.h"
64 int volume_id_probe_all(struct volume_id *id, unsigned long long off, unsigned long long size)
69 /* probe for raid first, cause fs probes may be successful on raid members */
70 if (volume_id_probe_linux_raid(id, off, size) == 0)
73 if (volume_id_probe_lvm1(id, off) == 0)
76 if (volume_id_probe_lvm2(id, off) == 0)
79 if (volume_id_probe_highpoint_ataraid(id, off) == 0)
82 /* signature in the first block, only small buffer needed */
83 if (volume_id_probe_vfat(id, off) == 0)
86 if (volume_id_probe_mac_partition_map(id, off) == 0)
89 if (volume_id_probe_xfs(id, off) == 0)
92 /* fill buffer with maximum */
93 volume_id_get_buffer(id, 0, SB_BUFFER_SIZE);
95 if (volume_id_probe_linux_swap(id, off) == 0)
98 if (volume_id_probe_ext(id, off) == 0)
101 if (volume_id_probe_reiserfs(id, off) == 0)
104 if (volume_id_probe_jfs(id, off) == 0)
107 if (volume_id_probe_udf(id, off) == 0)
110 if (volume_id_probe_iso9660(id, off) == 0)
113 if (volume_id_probe_hfs_hfsplus(id, off) == 0)
116 if (volume_id_probe_ufs(id, off) == 0)
119 if (volume_id_probe_ntfs(id, off) == 0)
122 if (volume_id_probe_cramfs(id, off) == 0)
125 if (volume_id_probe_romfs(id, off) == 0)
128 if (volume_id_probe_hpfs(id, off) == 0)
134 /* If the filestystem in recognized, we free the allocated buffers,
135 otherwise they will stay in place for the possible next probe call */
136 volume_id_free_buffer(id);
141 /* open volume by already open file descriptor */
142 struct volume_id *volume_id_open_fd(int fd)
144 struct volume_id *id;
146 id = malloc(sizeof(struct volume_id));
149 memset(id, 0x00, sizeof(struct volume_id));
156 /* open volume by device node */
157 struct volume_id *volume_id_open_node(const char *path)
159 struct volume_id *id;
162 fd = open(path, O_RDONLY);
164 dbg("unable to open '%s'", path);
168 id = volume_id_open_fd(fd);
172 /* close fd on device close */
178 /* open volume by major/minor */
179 struct volume_id *volume_id_open_dev_t(dev_t devt)
181 struct volume_id *id;
182 __u8 tmp_node[VOLUME_ID_PATH_MAX];
184 snprintf(tmp_node, VOLUME_ID_PATH_MAX,
185 "/dev/.volume_id-%u-%u-%u", getpid(), major(devt), minor(devt));
186 tmp_node[VOLUME_ID_PATH_MAX] = '\0';
188 /* create tempory node to open the block device */
190 if (mknod(tmp_node, (S_IFBLK | 0600), devt) != 0)
193 id = volume_id_open_node(tmp_node);
200 void volume_id_close(struct volume_id *id)
205 if (id->fd_close != 0)
208 volume_id_free_buffer(id);
210 if (id->partitions != NULL)
211 free(id->partitions);