udev-extraconf: allow users in disk group to write vfat filesystem

If filesystem type is vfat, change the ownership group to 'disk', and grant it
with  w/r/x permissions.

The user which belongs to 'disk' group could write the storage.

[YOCTO #4004]

(From OE-Core rev: eeed0cebebc945bf62b29336b9df8e2c0a975538)

Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 11 insertions, 0 deletions

diff --git a/meta/recipes-core/udev/udev-extraconf/mount.sh b/meta/recipes-core/udev/udev-extraconf/mount.sh
index d1419ed09c..327cfc6477 100644
--- a/meta/recipes-core/udev/udev-extraconf/mount.sh
+++ b/meta/recipes-core/udev/udev-extraconf/mount.sh
@@ -27,6 +27,17 @@ automount() {
                 MOUNT="$MOUNT -o silent"
         fi
         
+        # If filesystem type is vfat, change the ownership group to 'disk', and
+        # grant it with  w/r/x permissions.
+        case $ID_FS_TYPE in
+        vfat|fat)
+                MOUNT="$MOUNT -o umask=007,gid=`awk -F':' '/^disk/{print $3}' /etc/group`"
+                ;;
+        # TODO
+        *)
+                ;;
+        esac
+
         if ! $MOUNT -t auto $DEVNAME "/media/$name"
         then
                 #logger "mount.sh/automount" "$MOUNT -t auto $DEVNAME \"/media/$name\" failed!"