use-touch-id-for-sudo.sh

#!/bin/bash
# coding=utf-8
#
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation, either version 3 of the License, or
#    (at your option) any later version.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    <http://www.gnu.org/licenses/>.
#
# F-Gaudet 2018

# Initial tip : http://www.unixfu.ch/how-to-authenticate-sudo-with-touchid/

########## Use touchid for sudo - Add line after first comment
FILE="/etc/pam.d/sudo" 
if [ -e $FILE ]; then
  if [  $(grep -q "^auth sufficient pam_tid.so" $FILE;echo $?) == 1  ]; then
        echo "Patching file"
        sudo sed -i.bak '/^#/ a\
auth sufficient pam_tid.so
' $FILE
    fi
fi
##########