[PATCH] udev callout for reading filesystem labels

On Fri, Apr 30, 2004 at 03:29:54PM -0700, Greg KH wrote:
> On Thu, Apr 29, 2004 at 11:04:46PM +0200, Kay Sievers wrote:
> > Hi,
> > here is a small udev toy, which enables udev to name partitions by
> > its filesystem label or uuid's.
> >
> > The following udev rule:
> >
> >   KERNEL="sd*", PROGRAM="/sbin/udev_volume_id -M%M -m%m -u", SYMLINK="%c"
> >
> > creates a symlink with the uuid read from the filesystem. If no label or
> > uuid is found the program exits with nonzero and the rule will fail.
> >
> > ext2, ext3, reiserfs, xfs, jfs, vfat, msdos volume labels are supported,
> > ntfs and swap partitions can be recognized.
> >
> > It's possible to compile with klibc and the static binary takes 13kb.
>
> Very nice, I was wondering who was going to use that library to make
> such a tool.  This is even better as we can use klibc for it.

Here is a update, which supports iso9660 and udf labels.
Not very useful in the udev case, but I've added it for hal,
so we just catch up with the latest version.

1 files changed, 30 insertions, 23 deletions

diff --git a/extras/volume_id/volume_id.h b/extras/volume_id/volume_id.h
index a0d2acda22..2f20244c7c 100644
--- a/extras/volume_id/volume_id.h
+++ b/extras/volume_id/volume_id.h
@@ -3,27 +3,27 @@
  *
  * Copyright (C) 2004 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.
- * 
- *	This program 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
- *	General Public License for more details.
- * 
- *	You should have received a copy of the GNU General Public License along
- *	with this program; if not, write to the Free Software Foundation, Inc.,
- *	675 Mass Ave, Cambridge, MA 02139, USA.
+ *	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
  */
 
 #ifndef _VOLUME_ID_H_
 #define _VOLUME_ID_H_
 
-#define VOLUME_ID_VERSION		001
+#define VOLUME_ID_VERSION		002
 
-#define VOLUME_ID_LABEL_SIZE		16
+#define VOLUME_ID_LABEL_SIZE		32
 #define VOLUME_ID_UUID_SIZE		16
 #define VOLUME_ID_UUID_STRING_SIZE	37
 #define VOLUME_ID_PATH_MAX		255
@@ -38,20 +38,27 @@ enum filesystem_type {
 	JFS,
 	MSDOS,
 	VFAT,
+	UDF,
+	ISO9660,
 	NTFS,
 	SWAP
 };
 
 struct volume_id {
-	char label[VOLUME_ID_LABEL_SIZE];
-	char label_string[VOLUME_ID_LABEL_SIZE+1];
-	unsigned char uuid[VOLUME_ID_UUID_SIZE];
-	char uuid_string[VOLUME_ID_UUID_STRING_SIZE];
-	enum filesystem_type fs_type;
-	char *fs_name;
-	int fd;
-	char *buf;
-	int fd_close;
+	char		label_raw[VOLUME_ID_LABEL_SIZE];
+	size_t		label_raw_len;
+	char		label_string[VOLUME_ID_LABEL_SIZE+1];
+	unsigned char	uuid[VOLUME_ID_UUID_SIZE];
+	char		uuid_string[VOLUME_ID_UUID_STRING_SIZE];
+	enum		filesystem_type fs_type;
+	char		*fs_name;
+	int		fd;
+	char		*sbbuf;
+	size_t		sbbuf_len;
+	char		*seekbuf;
+	size_t		seekbuf_off;
+	size_t		seekbuf_len;
+	int		fd_close;
 };
 
 /* open volume by already open file descriptor */