volume_id: rename subdirectory

1 files changed, 52 insertions, 0 deletions

diff --git a/extras/volume_id/lib/squashfs.c b/extras/volume_id/lib/squashfs.c
new file mode 100644
index 0000000000..bdb1f16628
--- /dev/null
+++ b/extras/volume_id/lib/squashfs.c
@@ -0,0 +1,52 @@
+/*
+ * volume_id - reads filesystem label and uuid
+ *
+ * Copyright (C) 2006 Kay Sievers <kay.sievers@vrfy.org>
+ *
+ *	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 <config.h>
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <ctype.h>
+
+#include "libvolume_id.h"
+#include "util.h"
+
+#define SQUASHFS_MAGIC		0x73717368
+
+struct squashfs_super {
+	uint32_t		s_magic;
+} PACKED;
+
+int volume_id_probe_squashfs(struct volume_id *id, uint64_t off)
+{
+	struct squashfs_super *sqs;
+
+	dbg("probing at offset 0x%llx", (unsigned long long) off);
+
+	sqs = (struct squashfs_super *) volume_id_get_buffer(id, off + 0x200, 0x200);
+	if (sqs == NULL)
+		return -1;
+
+	if (sqs->s_magic == SQUASHFS_MAGIC || sqs->s_magic == bswap_32(SQUASHFS_MAGIC)) {
+		volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
+		id->type = "squashfs";
+		return 0;
+	}
+
+	return -1;
+}