From: Theodore Ts'o <tytso@mit.edu>
Date: Thu, 5 May 2005 22:06:04 +0000 (-0400)
Subject: Fix libblkid's magic number recognition for the cramfs filesystem,
X-Git-Tag: E2FSPROGS-1_38-WIP-0509~23
X-Git-Url: https://git.whamcloud.com/?a=commitdiff_plain;h=4c4e3f784330978fa127edaa3936957d38c7e93a;p=tools%2Fe2fsprogs.git

Fix libblkid's magic number recognition for the cramfs filesystem,
and add support to pull out the label for cramfs filesystems.
Thanks to Karel Zak (kzak at redhat.com) for the patch.
---

diff --git a/lib/blkid/ChangeLog b/lib/blkid/ChangeLog
index 5d9ef2e..1f9083f 100644
--- a/lib/blkid/ChangeLog
+++ b/lib/blkid/ChangeLog
@@ -1,3 +1,10 @@
+2005-05-05  Theodore Ts'o  <tytso@mit.edu>
+
+	* probe.c (probe_cramfs), probe.h: Fix magic number recognition
+		for the cramfs filesystem, and add support to pull out the
+		label for cramfs filesystems.  Thanks to Karel Zak (kzak
+		at redhat.com) for the patch.
+
 2005-03-31  Theodore Ts'o  <tytso@mit.edu>
 
 	* cache.c (blkid_get_cache): Use a much more paranoid
diff --git a/lib/blkid/probe.c b/lib/blkid/probe.c
index 14292b5..a67598e 100644
--- a/lib/blkid/probe.c
+++ b/lib/blkid/probe.c
@@ -303,6 +303,23 @@ static int probe_romfs(int fd __BLKID_ATTR((unused)),
 	return 0;
 }
 
+static int probe_cramfs(int fd __BLKID_ATTR((unused)), 
+		       blkid_cache cache __BLKID_ATTR((unused)), 
+		       blkid_dev dev,
+		       struct blkid_magic *id __BLKID_ATTR((unused)), 
+		       unsigned char *buf)
+{
+	struct cramfs_super_block *csb;
+	const char *label = 0;
+
+	csb = (struct cramfs_super_block *)buf;
+
+	if (strlen((char *) csb->name))
+		label = (char *) csb->name;
+	blkid_set_tag(dev, "LABEL", label, 0);
+	return 0;
+}
+
 static int probe_swap0(int fd __BLKID_ATTR((unused)),
 		       blkid_cache cache __BLKID_ATTR((unused)),
 		       blkid_dev dev,
@@ -489,7 +506,7 @@ static struct blkid_magic type_array[] = {
   { "xfs",	 0,	 0,  4, "XFSB",			probe_xfs },
   { "romfs",	 0,	 0,  8, "-rom1fs-",		probe_romfs },
   { "bfs",	 0,	 0,  4, "\316\372\173\033",	0 },
-  { "cramfs",	 0,	 0,  4, "E=\315\034",		0 },
+  { "cramfs",	 0,	 0,  4, "E=\315\050",		probe_cramfs },
   { "qnx4",	 0,	 4,  6, "QNX4FS",		0 },
   { "udf",	32,	 1,  5, "BEA01",		probe_udf },
   { "udf",	32,	 1,  5, "BOOT2",		probe_udf },
diff --git a/lib/blkid/probe.h b/lib/blkid/probe.h
index c1d923f..e545ef1 100644
--- a/lib/blkid/probe.h
+++ b/lib/blkid/probe.h
@@ -108,6 +108,21 @@ struct romfs_super_block {
 	unsigned char	ros_volume[16];
 };
 
+struct cramfs_super_block {
+	__u8		magic[4];
+	__u32		size;
+	__u32		flags;
+	__u32		future;
+	__u8		signature[16];
+	struct cramfs_info {
+		__u32		crc;
+		__u32		edition;
+		__u32		blocks;
+		__u32		files;
+	} info;
+	__u8		name[16];
+};
+
 struct swap_id_block {
 /*	unsigned char	sws_boot[1024]; */
 	__u32		sws_version;