1 files changed, 58 insertions, 0 deletions
diff --git a/util-linux/volume_id/cramfs.c b/util-linux/volume_id/cramfs.c
new file mode 100644
index 000000000..fd6e87522
--- /dev/null
+++ b/util-linux/volume_id/cramfs.c
@@ -0,0 +1,58 @@
+/*
+ * volume_id - reads filesystem label and uuid
+ *
+ * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
+ *
+ *	This library is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU Lesser General Public
+ *	License as published by the Free Software Foundation; either
+ *	version 2.1 of the License, or (at your option) any later version.
+ *
+ *	This library is distributed in the hope that it will be useful,
+ *	but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ *	Lesser General Public License for more details.
+ *
+ *	You should have received a copy of the GNU Lesser General Public
+ *	License along with this library; if not, write to the Free Software
+ *	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include "volume_id_internal.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 = 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;
+}