#!/bin/bash

## Copyright (C) 2012 - 2019 ENCRYPTED SUPPORT LP <adrelanos@riseup.net>
## See the file COPYING for copying conditions.

## Doing this for all users would create many issues.
# /usr/lib/security-misc/permission-lockdown: user: root | chmod o-rwx "/root"
# /usr/lib/security-misc/permission-lockdown: user: daemon | chmod o-rwx "/usr/sbin"
# /usr/lib/security-misc/permission-lockdown: user: bin | chmod o-rwx "/bin"
# /usr/lib/security-misc/permission-lockdown: user: sys | chmod o-rwx "/dev"
# /usr/lib/security-misc/permission-lockdown: user: sync | chmod o-rwx "/bin"
# /usr/lib/security-misc/permission-lockdown: user: games | chmod o-rwx "/usr/games"
# /usr/lib/security-misc/permission-lockdown: user: man | chmod o-rwx "/var/cache/man"
# /usr/lib/security-misc/permission-lockdown: user: mail | chmod o-rwx "/var/mail"
# /usr/lib/security-misc/permission-lockdown: user: proxy | chmod o-rwx "/bin"
# /usr/lib/security-misc/permission-lockdown: user: backup | chmod o-rwx "/var/backups"
# /usr/lib/security-misc/permission-lockdown: user: systemd-timesync | chmod o-rwx "/run/systemd"
# /usr/lib/security-misc/permission-lockdown: user: systemd-network | chmod o-rwx "/run/systemd/netif"
# /usr/lib/security-misc/permission-lockdown: user: messagebus | chmod o-rwx "/var/run/dbus"
# /usr/lib/security-misc/permission-lockdown: user: tinyproxy | chmod o-rwx "/run/tinyproxy"
# /usr/lib/security-misc/permission-lockdown: user: rtkit | chmod o-rwx "/proc"
# /usr/lib/security-misc/permission-lockdown: user: colord | chmod o-rwx "/var/lib/colord"
# /usr/lib/security-misc/permission-lockdown: user: Debian-exim | chmod o-rwx "/var/spool/exim4"
# /usr/lib/security-misc/permission-lockdown: user: debian-tor | chmod o-rwx "/var/lib/tor"
# /usr/lib/security-misc/permission-lockdown: user: stunnel4 | chmod o-rwx "/var/run/stunnel4"
# /usr/lib/security-misc/permission-lockdown: user: iodine | chmod o-rwx "/var/run/iodine"
# /usr/lib/security-misc/permission-lockdown: user: apt-cacher-ng | chmod o-rwx "/var/cache/apt-cacher-ng"
# /usr/lib/security-misc/permission-lockdown: user: statd | chmod o-rwx "/var/lib/nfs"
# /usr/lib/security-misc/permission-lockdown: user: timidity | chmod o-rwx "/etc/timidity"
# /usr/lib/security-misc/permission-lockdown: user: uuidd | chmod o-rwx "/run/uuidd"
# /usr/lib/security-misc/permission-lockdown: user: _rpc | chmod o-rwx "/run/rpcbind"
# /usr/lib/security-misc/permission-lockdown: user: geoclue | chmod o-rwx "/var/lib/geoclue"

home_folder_access_rights_lockdown() {
   mkdir -p /var/cache/security-misc/state-files

   shopt -s nullglob

   ## Not using dotglob.
   ## touch /var/cache/security-misc/state-files//home/.Trash
   ## touch: cannot touch '/var/cache/security-misc/state-files//home/.Trash': No such file or directory

   local folder_name base_name

   for folder_name in /home/* ; do
      base_name="$(basename "$folder_name")"
      if [ -f "/var/cache/security-misc/state-files/$base_name" ]; then
         continue
      fi
      echo "$0: chmod o-rwx \"$folder_name\""
      chmod o-rwx "$folder_name"
      ## Create a state-file so we do this only once.
      ## Therefore a user who will manually undo this, will not get
      ## annoyed by this being done over and over again.
      touch "/var/cache/security-misc/state-files/$base_name"
   done

   shopt -u nullglob
}

home_folder_access_rights_lockdown

exit 0