Reset Drupal code base file permissions.

d-file-perms.sh

#!/bin/bash

cd `drush dd`
sudo chown [user]:[group] -R .

sudo find . -type d -exec chmod u=rwx,g=rx,o= '{}' \;
sudo find . -type d -exec chmod u=rwx,g=rx,o= '{}' \;

cd sites
for d in ./*/files
do
   find $d -type d -exec chmod ug=rwx,o= '{}' \;
   find $d -type f -exec chmod ug=rw,o= '{}' \;
done