reorg bash

bash/um

@@ -0,0 +1,25 @@
+#!/bin/bash
+
+# export so that we can use it in subscripts.
+export UMBASEPATH=`realpath $0 | xargs dirname`
+
+# catch first arguments with $1
+case "$1" in
+    next)
+        $UMBASEPATH/next.sh $2
+        ;;
+    last)
+        $UMBASEPATH/last.sh
+        ;;
+    cat)
+        # all args but first
+        $UMBASEPATH/cat.sh "${@:2}"
+        ;;
+    rename)
+        $UMBASEPATH/rename.sh "${@:2}"
+        ;;
+    *)
+        # else
+        echo "usage: um (next|last|cat|rename)"
+        ;;
+esac