Determine user logged in as root and export git env variables

bash.git

#
# Export some environment variables so git can better determine the real user
# making commits when 'su'ed as the root user.
#

### Git Settings
USERNAME=`who -m | cut -d ' ' -f 1`

# Set the git author name and email
GIT_AUTHOR_EMAIL=`who -m | awk -F ' ' '{print $1"@"$5}' | sed -e 's/[()]//g'`
GIT_AUTHOR_NAME=`grep ^$USERNAME: /etc/passwd | cut -d ':' -f5`

# Default to the user's username if no name is found
[ -z "$GIT_AUTHOR_NAME" ] && GIT_AUTHOR_NAME=$USERNAME

export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL