rewrite scripts

try to provide better syntax and avoid using bash

debian/bin/no-depmod

@@ -6,13 +6,20 @@ set -e
 # postinst, we do not need or want to package the files that it
 # generates.
 
-if [ "x$1" = x-V ]; then
+case "$1" in
+-V )
     # Satisfy version test
     echo 'not really module-init-tools'
-elif [ "x$1" = x-b -a "${2%/depmod.??????}" != "$2" ]; then
-    # Satisfy test of short kernel versions
-    mkdir -p "$2/lib/modules/$3"
-    touch "$2/lib/modules/$3/modules.dep"
-else
-    echo 'skipping depmod'
-fi
+    exit
+;;
+-b )
+    if [ "${2%/depmod.??????}" != "$2" ] ; then
+        # Satisfy test of short kernel versions
+        mkdir -p "$2/lib/modules/$3"
+        touch "$2/lib/modules/$3/modules.dep"
+        exit
+    fi
+;;
+esac
+
+echo 'skipping depmod'