admin-stuff/set_directory_permissions.sh

#!/usr/bin/env bash

working_dir="$(dirname $(realpath $0))"
conf_file="${working_dir}/conf/set_directory_permissions.conf"

LOCK_DIR="/tmp/set_directory_permissions.LOCK"


# -------------
# - Some functions
# -------------

clean_up() {

   # Perform program exit housekeeping
   rm -rf "$LOCK_DIR"
   exit $1
}

echononl(){
   if $terminal ; then
      echo X\\c > /tmp/shprompt$$
      if [ `wc -c /tmp/shprompt$$ | awk '{print $1}'` -eq 1 ]; then
         echo -e -n "$*\\c" 1>&2
      else
         echo -e -n "$*" 1>&2
      fi
      rm /tmp/shprompt$$
   fi
}

fatal(){
   echo ""
   if $terminal ; then
      echo -e "   [ \033[31m\033[1mFatal\033[m ]: $*"
      echo ""
      echo -e "              \033[31m\033[1mScript was terminated\033[m!"
   else
      echo "   [ Fatal ]: $*"
      echo ""
      echo "              Script was terminated...."
   fi
   echo ""
   clean_up 1
}

error (){
   echo ""
   if $terminal ; then
      echo -e "   [ \033[31m\033[1mError\033[m ]: $*"
   else
      echo "[ Error ]: $*"
   fi
   echo ""
}

warn (){
   echo ""
   if $terminal ; then
      echo -e "   [ \033[33m\033[1mWarning\033[m ]: $*"
   else
      echo "[ Warning ]: $*"
   fi
   echo ""
}
info (){

   if $terminal ; then
      echo ""
      echo -e "   [ \033[32m\033[1mInfo\033[m ]: $*"
      echo ""
   fi
}

echo_done() {
   if $terminal ; then
      echo -e "\033[75G[ \033[32mdone\033[m ]"
   fi
}
echo_failed(){
   if $terminal && $LOGGING ; then
      echo -e "\033[75G[ \033[1;31mfailed\033[m ]"
   fi
}
echo_skipped() {
   if $terminal && $LOGGING ; then
      echo -e "\033[75G[ \033[33m\033[1mskipped\033[m ]"
   fi
}

trim() {
    local var="$*"
    var="${var#"${var%%[![:space:]]*}"}"   # remove leading whitespace characters
    var="${var%"${var##*[![:space:]]}"}"   # remove trailing whitespace characters
    echo -n "$var"
}


# -------------
# - Running in a terminal?
# -------------

if [[ -t 1 ]] ; then
   terminal=true
else
   terminal=false
fi


# -------------
# - Read Configurations from $conf_file
# -------------

if [[ ! -f "$conf_file" ]]; then
	fatal " Configuration file '$(basename ${conf_file})' not found!"
else
   source "$conf_file"
fi

[[ -z "$(trim $dir_permissions)" ]] && fatal "No directory given!"


# -------------
# - Job is already running?
# -------------

# - If job already runs, stop execution..
# -
if mkdir "$LOCK_DIR" 2> /dev/null ; then

   ## - Remove lockdir when the script finishes, or when it receives a signal
   trap clean_up SIGHUP SIGINT SIGTERM

else

   datum="$(date +"%d.%m.%Y %H:%M")"

   msg="   [ Error ]: A previos instance of '$(basename $0)' seems already be running.\n\n              Exiting now.."

	error "A previos instance of the script '$(basename $0)' seems already be running."

   exit 1

fi

for _dir_perm in $dir_permissions ; do
	IFS=':' read -a _dir_perm_arr <<< "${_dir_perm}"

	base_dir="${_dir_perm_arr[0]}"
	if [[ -z "$(trim "$base_dir")" ]]; then
		error "Directory not given!"
		continue
	fi
	if [[ ! -d "$base_dir" ]]; then
		error "Cannot find directory '$base_dir'"
		continue
	fi

	group="${_dir_perm_arr[1]}"
	if [[ -z "$(trim "$group")" ]]; then
		error "Group not given!"
		continue
	fi
	if ! grep -E -q "^${group}:" /etc/group ; then
		error "Group '$group' does not exist!"
	fi

	file_perm="${_dir_perm_arr[2]}"
	if [[ -z "$(trim "$file_perm")" ]]; then
		error "File permissions not given!"
		continue
	fi

	dir_perm="${_dir_perm_arr[3]}"
	if [[ -z "$(trim "$dir_perm")" ]]; then
		error "Directory permissions not given!"
		continue
	fi

   info "Set Permisions on \033[1m${base_dir}\033[m: Group:\033[1m${group}\033[m Perimissions: \033[1m${dir_perm}/${file_perm}\033[m .."

   chmod $dir_perm $base_dir
   chgrp $group $base_dir

   while IFS='' read -r -d '' filename ; do

      [[ -f "$filename" ]] && ( chmod $file_perm "$filename"; chgrp $group "$filename")
      [[ ! -d  "$filename" ]]  && continue

      [[ "$filename" =~ .Trash ]] && continue
      [[ "$filename" = "lost+found" ]] && continue

      chmod $dir_perm "$filename" ; chgrp $group "$filename"

      find "$filename" ! -group $group -exec chgrp -R $group {} \;
      find "$filename" -type d ! -perm $dir_perm -exec chmod -R $dir_perm {} \;
      find "$filename" -type f ! -perm $file_perm -exec chmod -R $file_perm {} \;

      
   done  < <(find $base_dir -mindepth 1 -maxdepth 1 -print0)

done

clean_up 0