1 files changed, 5 insertions, 1 deletions

diff --git a/src/xorriso-usb.sh b/src/xorriso-usb.sh
index 61fcda0..7ff9825 100644
--- a/src/xorriso-usb.sh
+++ b/src/xorriso-usb.sh
@@ -35,6 +35,10 @@ fi
 
 for fs; do
     [ -f "$fs" ] || die "not a file: $fs"
+    case "$fs" in
+        *.btrfs) ;;
+        *) die "invalid name (does not match *.btrfs): $fs" ;;
+    esac
     shift
     set -- "$@" "rootfs/${fs##*/}=$fs"
 done
@@ -137,7 +141,7 @@ if [ "$QUICK_TEST" ]; then
 fi
 
 if [ "$REPLACE_INITRD" ]; then
-    initrd.sh
+    initrd.sh || die 'initrd.sh failed'
 fi
 
 (set -x