adapt fix game perm script with these approaches

[Fred T. Hamster]

simpler code:

# fix directories to be readable and traversable by everyone.
sudo find /opt/x -type d -exec chmod 755 {} ';'

# fix executable files to be runnable by everyone.
sudo find /opt/x -type f -perm /u+x -exec chmod g+rx,o+rx {} ';'

# fix non-executable files to be readable by everyone.
sudo find /opt/x -type f -perm /u+r -exec chmod g+r,o+r {} ';'