/* * volume_id - reads filesystem label and uuid * * Copyright (C) 2004 Kay Sievers * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation version 2 of the License. */ #ifndef _GNU_SOURCE #define _GNU_SOURCE 1 #endif #ifdef HAVE_CONFIG_H # include #endif #include #include #include #include #include #include #include "volume_id.h" #include "logging.h" #include "util.h" struct cramfs_super { uint8_t magic[4]; uint32_t size; uint32_t flags; uint32_t future; uint8_t signature[16]; struct cramfs_info { uint32_t crc; uint32_t edition; uint32_t blocks; uint32_t files; } __attribute__((__packed__)) info; uint8_t name[16]; } __attribute__((__packed__)); int volume_id_probe_cramfs(struct volume_id *id, uint64_t off) { struct cramfs_super *cs; dbg("probing at offset 0x%llx", (unsigned long long) off); cs = (struct cramfs_super *) volume_id_get_buffer(id, off, 0x200); if (cs == NULL) return -1; if (memcmp(cs->magic, "\x45\x3d\xcd\x28", 4) == 0) { volume_id_set_label_raw(id, cs->name, 16); volume_id_set_label_string(id, cs->name, 16); volume_id_set_usage(id, VOLUME_ID_FILESYSTEM); id->type = "cramfs"; return 0; } return -1; }