common: add _mkfs_dev helper

It is not good practice to directly use MKFS_PROG.

Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

common/rc

@@ -509,6 +509,34 @@ _test_mkfs()
     esac
 }
 
+_mkfs_dev()
+{
+    case $FSTYP in
+    nfs*)
+	# do nothing for nfs
+	;;
+    udf)
+        $MKFS_UDF_PROG $MKFS_OPTIONS $* 2>$tmp_dir.mkfserr 1>$tmp_dir.mkfsstd
+	;;
+    btrfs)
+        $MKFS_BTRFS_PROG $MKFS_OPTIONS $* 2>$tmp_dir.mkfserr 1>$tmp_dir.mkfsstd
+	;;
+    *)
+	yes | $MKFS_PROG -t $FSTYP -- $MKFS_OPTIONS $* \
+		2>$tmp_dir.mkfserr 1>$tmp_dir.mkfsstd
+	;;
+    esac
+
+    if [ $? -ne 0 ]; then
+	# output stored mkfs output
+	cat $tmp_dir.mkfserr >&2
+	cat $tmp_dir.mkfsstd
+	status=1
+	exit 1
+    fi
+    rm -f $tmp_dir.mkfserr $tmp_dir.mkfsstd
+}
+
 _scratch_mkfs()
 {
     case $FSTYP in