LXR busybox/util-linux/volume

   1/*
   2 * volume_id - reads filesystem label and uuid
   3 *
   4 * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
   5 *
   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.
  10 *
  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.
  15 *
  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
  19 */
  20//config:config FEATURE_VOLUMEID_ROMFS
  21//config:       bool "romfs filesystem"
  22//config:       default y
  23//config:       depends on VOLUMEID
  24
  25//kbuild:lib-$(CONFIG_FEATURE_VOLUMEID_ROMFS) += romfs.o
  26
  27#include "volume_id_internal.h"
  28
  29struct romfs_super {
  30        uint8_t magic[8];
  31        uint32_t size;
  32        uint32_t checksum;
  33        uint8_t name[];
  34} PACKED;
  35
  36int FAST_FUNC volume_id_probe_romfs(struct volume_id *id /*,uint64_t off*/)
  37{
  38#define off ((uint64_t)0)
  39        struct romfs_super *rfs;
  40
  41        dbg("probing at offset 0x%llx", (unsigned long long) off);
  42
  43        rfs = volume_id_get_buffer(id, off, 0x200);
  44        if (rfs == NULL)
  45                return -1;
  46
  47        if (memcmp(rfs->magic, "-rom1fs-", 4) == 0) {
  48                size_t len = strlen((char *)rfs->name);
  49
  50                if (len) {
  51//                      volume_id_set_label_raw(id, rfs->name, len);
  52                        volume_id_set_label_string(id, rfs->name, len);
  53                }
  54
  55//              volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
  56                IF_FEATURE_BLKID_TYPE(id->type = "romfs";)
  57                return 0;
  58        }
  59
  60        return -1;
  61}
  62