#! /bin/bash

#----------------------------------------------------------------------
# copyright (C) 2023 Koozali SME Server
#               
# 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 2 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.
#               
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
# 
#----------------------------------------------------------------------

# fix ownership of spool folder content
pushd /var/spool/mail/ >/dev/null
for file in *; do
  if [ ! -f "$file" ]; then
    continue
  fi
  if ( ! `id -u $file 2>/dev/null 1>&2`) ; then
    echo "$file user does not exist deleting mail spool file" 
    rm -f /var/spool/mail/$file
    continue
  fi
  userf=$(stat -c %U /var/spool/mail/$file 2>/dev/null)
  if [[ "$userf" != "$file" ]]; then
    uidf=$(stat -c %u /var/spool/mail/$file 2>/dev/null)
    uiduser=$(id -u $file 2>/dev/null )
    # extra step needed if username has an alias eg www=apache
    if [[ "$uidf" != "$uiduser" ]]; then
    echo "fixing ownership of $file spool mail"
    # extra security we want to clean it from sensitive information
    echo ""> /var/spool/mail/$file
    chown $file /var/spool/mail/$file
    fi
  fi
done
popd >/dev/null