#!/bin/sh
#----------------------------------------------------------------------------
# /etc/init.d/postfix - Postfix init script for eisfair-1 and eisfair-2
#
# Copyright (c) 2004 Jens Vehlhaber <jens(at)eisfair(dot)org>
#
# Creation:     2004-04-23 jv
# Last Update:  $Id$
#
# 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.
#----------------------------------------------------------------------------

# include configuration
. /etc/config.d/vmail

postfix_root='/var/spool/postfix'
#postfix_chroot="$postfix_root"
# chroot not correct work with dns resolv if not copy libnss_* files

# default value
nreturn="0"

### -------------------------------------------------------------------------
### start/stop and failure message color output
### -------------------------------------------------------------------------
COLOR_RED='\033[1;31m'
COLOR_NRM='\033[0;39m'

log_end_msg ()
{
    echo -n "   "
    if [ "$1" = "0" ]
    then
        echo -e "\033[300C\033[$[7]D [ OK ]"
    elif [ "$1" = "9" ]
    then
        echo -e "\033[300C\033[$[9]D disabled"
    else
        echo -e "\033[300C\033[$[7]D [${COLOR_RED}fail${COLOR_NRM}]"
        nreturn=1
    fi
}


### -------------------------------------------------------------------------
### check if program running
### -------------------------------------------------------------------------
get_program_pid()
{
    if [ -n "`ps -ef | grep -v grep | grep "$1 " 2>/dev/null`" ]
    then
        echo "0"        
        return 0
    else
        return 1
    fi 
}


get_program_portnr()
{
    if [ -n "`netstat -tnl | grep -v grep | grep ":$1 " 2>/dev/null`" ]
    then
        echo "0"       
        return 0
    else
        return 1
    fi 
}


get_program_sock()
{
    if [ -n "`netstat -xnl | grep -v grep | grep ${1} 2>/dev/null`" ] 
    then
        echo "0"       
        return 0
    else
        return 1
    fi
}


### -------------------------------------------------------------------------
### start if not running
### -------------------------------------------------------------------------
start_and_wait()
{
    local start_type="$1"
    local start_prg_file="$2"
    local start_param="$3"
    if ! get_program_pid $start_prg_file >/dev/null
    then
        eval "${start_type} ${start_prg_file} ${start_param}"
        for count in 1 2 3
        do
            if get_program_pid $start_prg_file >/dev/null
            then
                break
            fi 
            echo -n "."
            sleep 1
        done 
    fi
}


### -------------------------------------------------------------------------
### start smtpd service
### -------------------------------------------------------------------------
start_smtpd()
{
    local count=0
    if ! get_program_portnr 25 >/dev/null
    then
        /usr/sbin/postfix start >/dev/null 2>&1
        for count in 1 2 3 4
        do
            if get_program_portnr 25 >/dev/null
            then
                break
            fi 
            echo -n "."
            sleep 1
        done 
    fi
    if [ $count -eq 4 ]
    then
        log_end_msg 1
    else
        log_end_msg 0
    fi
}


### -------------------------------------------------------------------------
### stop smtpd service
### -------------------------------------------------------------------------
stop_smtpd()
{
    local count=0
    if get_program_portnr 25 >/dev/null
    then
        /usr/sbin/postfix stop >/dev/null 2>&1
        for count in 1 2 3 4
        do
            if ! get_program_portnr 25 >/dev/null
            then
                break
            fi 
            echo -n "."
            sleep 1
        done 
        if [ $count -eq 4 ]
        then
            killall -wq master
        fi
    fi
}


### -------------------------------------------------------------------------
### stop an wait
### -------------------------------------------------------------------------
stop_and_wait()
{
    local stop_prg_type="$1"
    local stop_prg_file="$2"
    local stop_pid_file="$3"
    if get_program_pid $stop_prg_file >/dev/null
    then
        for count in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
        do
            eval "${stop_prg_type} ${stop_prg_file}" >/dev/null 2>&1
            if ! get_program_pid $stop_prg_file >/dev/null
            then
                break
            fi
            if [ ${count} -gt 5 ]
            then
                killall -KILL ${stop_prg_file} >/dev/null 2>&1
            fi
            echo -n "."
            sleep 1
        done
    fi
    if [ -f ${stop_pid_file} ]
    then
        rm -f ${stop_pid_file}
    fi
}


### -------------------------------------------------------------------------
### update chroot
### -------------------------------------------------------------------------
# Link source file to destination directory if possible. If the link is a
# symbolic link, make a copy of the link in the destination directory,
# otherwise copy the file.
copy() {
    file=`basename ${1}`
    cp -dpf ${1} ${2}/${file}
}

update_chroot()
{
    # setup the empty chroot directory structure
    for i in /etc /lib /usr/lib/zoneinfo /usr/share/zoneinfo /var/run
    do
        mkdir -p ${postfix_root}${i}
    done
    rm -f ${postfix_root}/etc/*
    rm -f ${postfix_root}/lib/*

    if [ -n "$postfix_chroot" ]
    then 
        chmod 0777 ${postfix_root}/var/run
        for i in /etc/localtime /usr/lib/zoneinfo/localtime \
	             /usr/share/zoneinfo/localtime \
                 /etc/host.conf /etc/resolv.conf /etc/nsswitch.conf \
                 /etc/hosts /etc/services
            do
                [ -e ${i} ] && copy ${i} `dirname ${postfix_root}${i}`
        done
  
        # determine glibc version
        LIBCVER=`ls -l /lib/libc.so.6* | sed "s/.*libc-\(.*\).so$/\1/g"`
        # copy the relevant parts of glibc into the chroot
        for i in compat dns files hesoid ldap nis nisplus winbind wins
        do
            [ -e /lib/libnss_${i}-${LIBCVER}.so ] && copy /lib/libnss_${i}-${LIBCVER}.so ${postfix_root}/lib/
            [ -e /lib/libnss_${i}.so ] && copy /lib/libnss_${i}.so ${postfix_root}/lib/
            [ -e /lib/libnss_${i}.so.2 ] && copy /lib/libnss_${i}.so.2 ${postfix_root}/lib/
        done
        [ -e /lib/libnss_db.so.2.0.0 ] && copy /lib/libnss_db.so.2.0.0 ${postfix_root}/lib/
        [ -e /lib/libresolv-${LIBCVER}.so ] && copy /lib/libresolv-${LIBCVER}.so ${postfix_root}/lib/
        [ -e /lib/libresolv-${LIBCVER}.so.2 ] && copy /lib/libresolv-${LIBCVER}.so.2 ${postfix_root}/lib/
        ldconfig -n ${postfix_root}/lib # not convinced this is necessary

        mkdir -p ${postfix_root}/var/lib/mysql
        chown mysql ${postfix_root}/var/lib/mysql
        tmp=`mount | grep '/var/spool/postfix/'`
        if [ -z "$tmp" ]
        then
            mount -o bind /var/lib/mysql ${postfix_root}/var/lib/mysql
        fi
    fi
}


### -------------------------------------------------------------------------
### main
### -------------------------------------------------------------------------
case "$1" in
    start)
        update_chroot
        echo -n " * Starting Postfix ..."
        start_and_wait /usr/local/postfix/clamsmtpd "-p /var/run/clamsmtpd.pid"
        if [ "$POSTFIX_DSPAM" = 'yes' ]
        then
            start_and_wait "startproc -s -u vmail" /usr/local/dspam/dspam "--daemon" 2>/dev/null &
        fi
        if [ "$POSTFIX_GLD" = "yes" ]
        then
            start_and_wait startproc /usr/local/policyd/policyd "-c /etc/postfix/policyd.conf"
        fi
        if [ "$POSTFIX_DRACD" = 'yes' ]
        then
            start_and_wait startproc /usr/local/postfix/dracd "-i -e ${POSTFIX_DRACD_RELAYTIME} /etc/postfix/dracd.db"
        fi
        start_smtpd
        ;;
    stop)
        echo -n " * Stopping Postfix ..."
        stop_smtpd
        stop_and_wait killall  /usr/local/postfix/clamsmtpd /var/run/clamsmtpd.pid
        stop_and_wait killproc /usr/local/dspam/dspam /var/run/dspam.pid
        stop_and_wait killproc /usr/local/policyd/policyd /var/run/policyd.pid
        stop_and_wait killproc /usr/local/postfix/dracd
        log_end_msg 0
        ;;
    reload)
        echo " * Reloading Postfix ..."
        /usr/sbin/postfix reload
        ;;

    abort)
        echo " * Aborting Postfix ..."
        /usr/sbin/postfix abort
        ;;

    flush)
        echo " * Flushing Postfix ..."
        /usr/sbin/postfix flush
        ;;
    check)
        echo " * Checking Postfix ..."
        /usr/sbin/postfix check
        ;;
    restart)
        $0 stop
        if [ "$START_POSTFIX" = 'yes' ]
        then
            $0 start
        fi
        ;;
    status)
        echo -n "   SMTP                    "
        log_end_msg `get_program_portnr 25`
        echo -n "   SMTP-TLS                "
        if [ ! "$POSTFIX_SMTP_TLS" = 'yes' ]
        then
            log_end_msg 9
        else
            log_end_msg `get_program_portnr 465`
        fi
        if [ "$POSTFIX_GLD" = 'yes' ]
        then
            echo -n "   Greylisting             "
            log_end_msg `get_program_portnr 10031`
        fi
        echo -n "   ClamSMTP                "
        log_end_msg `get_program_portnr 10025`
        echo -n "   DSPAM                   "
        if [ ! "$POSTFIX_DSPAM" = 'yes' ]
        then
            log_end_msg 9
        else
            log_end_msg `get_program_sock /var/run/dspam.sock`
        fi
        echo -n "   DRACD                   "
        if [ ! "$POSTFIX_DRACD" = 'yes' ]
        then
            log_end_msg 9
        else
            log_end_msg `get_program_sock /var/run/dracd.sock`
        fi
        ;;
    *)
        echo "Usage: $0 {start|stop|reload|abort|flush|check|restart}"
        exit 1
        ;;
esac

### -------------------------------------------------------------------------
exit $nreturn