mkuserimg.sh: set default size according to the $SRC_DIR size

Add extra size by the $SRC_DIR size plus 10%.

diff --git a/ext4_utils/mkuserimg.sh b/ext4_utils/mkuserimg.sh
index 8667013..a737d3c 100755 (executable)
--- a/ext4_utils/mkuserimg.sh
+++ b/ext4_utils/mkuserimg.sh
@@ -88,6 +88,9 @@ fi
 if [ -z $SIZE ]; then
   echo "Need size of filesystem"
   exit 2
+elif [ 0 -eq 0$SIZE ]; then
+  s=$(du -sm $SRC_DIR | cut -f1)
+  SIZE=$(($s / 10 + $s))M
 fi
 
 OPT=""