From accff726856a0b3258a413d823a534f4f437e6b2 Mon Sep 17 00:00:00 2001 From: Kay Sievers Date: Wed, 9 Nov 2005 15:08:45 +0100 Subject: volume_id: provide libvolume_id.a file Signed-off-by: Kay Sievers --- extras/volume_id/libvolume_id/cramfs.c | 65 ++++++++++++++++++++++++++++++++++ 1 file changed, 65 insertions(+) create mode 100644 extras/volume_id/libvolume_id/cramfs.c (limited to 'extras/volume_id/libvolume_id/cramfs.c') diff --git a/extras/volume_id/libvolume_id/cramfs.c b/extras/volume_id/libvolume_id/cramfs.c new file mode 100644 index 0000000000..0ad5886b32 --- /dev/null +++ b/extras/volume_id/libvolume_id/cramfs.c @@ -0,0 +1,65 @@ +/* + * 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; +} -- cgit v1.2.3-54-g00ecf