Let's not assume bash is always /bin/bash.

ext/session/mod_files.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 if [[ "$2" = "" ]] || [[ "$3" = "" ]]; then
        echo "Usage: $0 BASE_DIRECTORY DEPTH HASH_BITS"
@@ -61,5 +61,5 @@ echo "Creating session path in $directory with a depth of $depth for session.has
 for i in $hash_chars; do
        newpath="$directory/$i"
        mkdir $newpath || exit 1
-       /bin/bash $0 $newpath `expr $depth - 1` $hashbits recurse
+       bash $0 $newpath `expr $depth - 1` $hashbits recurse
 done