Set permissions for a web server document root directory

httpd-chmod.sh

#!/bin/bash

dir=$1
user=$2
err=()

if [ "$UID" -ne 0 ]; then
   err+=("this script must be run as root")
fi

if [ -z "$dir" ]; then
   err+=("a directory was not specified")
elif [ ! -d "$dir" ]; then
   err+=("invalid argument provided for directory")
fi

if [ -z "$user" ]; then
   err+=("a user was not specified")
elif [ "$(getent passwd $user)" = "" ];then
   err+=("user '"$user"' could not be found")
fi

errcnt=${#err[*]}
if [ "$errcnt" -eq 0 ]; then
   echo "updating ownership..."
   chown -R $user:$user "$dir" || { echo 'failed'; exit 1; }
   echo "changing directory permissions..."
   chmod 2775 "$dir"|| { echo 'failed' ; exit 1; }
   echo "finding and updating child directory permissions..."
   find "$dir" -type d -exec chmod 2775 {} + || { echo 'failed'; exit 1; }
   echo "finding and updating child file permissions..."
   find "$dir" -type f -exec chmod 0664 {} + || { echo 'failed'; exit 1; }
   echo "done"
   exit 0
fi

[[ "$errcnt" = 1 ]] && msg="an error" || msg="the following errors"
echo $msg" occured"
printf -- ' - %s\n' "${err[@]}"
echo "
Usage: "$(basename "$0")" [directory] [username]
Set suitable permissions for a webserver directory

Arguments:
  directory  an absolute path to a directory
  username   the name of the user"
exit 1