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
  21#include "volume_id_internal.h"
  22
  23struct cramfs_super {
  24        uint32_t        magic;
  25        uint32_t        size;
  26        uint32_t        flags;
  27        uint32_t        future;
  28        uint8_t         signature[16];
  29        struct cramfs_info {
  30                uint32_t        crc;
  31                uint32_t        edition;
  32                uint32_t        blocks;
  33                uint32_t        files;
  34        } PACKED info;
  35        uint8_t         name[16];
  36} PACKED;
  37
  38int FAST_FUNC volume_id_probe_cramfs(struct volume_id *id /*,uint64_t off*/)
  39{
  40#define off ((uint64_t)0)
  41        struct cramfs_super *cs;
  42
  43        dbg("probing at offset 0x%llx", (unsigned long long) off);
  44
  45        cs = volume_id_get_buffer(id, off, 0x200);
  46        if (cs == NULL)
  47                return -1;
  48
  49        if (cs->magic == cpu_to_be32(0x453dcd28)) {
  50//              volume_id_set_label_raw(id, cs->name, 16);
  51                volume_id_set_label_string(id, cs->name, 16);
  52
  53//              volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
  54//              id->type = "cramfs";
  55                return 0;
  56        }
  57
  58        return -1;
  59}
  60