Script to grant R/W permissions to staff

allow_staff_access.sh

#!/bin/bash

# --------------------------------------------------

# This script grants READ AND WRITE permissions to staff, for the specified directory.

# Takes 1 parameter ($1): A directory.
# Recursively changes the directory to have group=staff,
# and adds read and write permissions for that group.
# Also adds execute permissions for all directories (but not files).

# --------------------------------------------------

# Make the script terminate if any line fails.
set -e


# Parse command line options.
# "-y" means don't confirm changes.
DO_CONFIRM=true
while getopts y: option
do
  case "${option}"
  in
    y) DO_CONFIRM=false; shift 1;;
  esac
done


# Check number of command-line args.
if [ $# != 1 ]
  then
    echo "Incorrect number of arguments. One argument expected (a directory)."
    exit 1
fi


echo "Changing group permissions for $1"

if [ $DO_CONFIRM == false ]
  then
    REPLY=y
  else
    read -p "Do you want to continue? (y/n) " -n 1 -r
    echo
fi


if [[ $REPLY =~ ^[Yy]$ ]]
  then

    # The meat of the script.
    chgrp -R staff $1
    chmod -R g+rw $1
    # This finds only the directories.
    find $1 -type d -print0 | xargs -0 chmod g+x

    echo "Finished changing group permissions for $1"

  else

    echo "Cancelled changing group permissions"
    exit 1
fi