#!/bin/sh

#++
# NAME
#	postfix-script 1
# SUMMARY
#	execute Postfix administrative commands
# SYNOPSIS
#	\fBpostfix-script\fR \fIcommand\fR
# DESCRIPTION
#	The \fBpostfix-script\fR script executes Postfix administrative
#	commands in an environment that is set up by the \fBpostfix\fR(1)
#	command.
# SEE ALSO
#	master(8) Postfix master program
#	postfix(1) Postfix administrative interface
# LICENSE
# .ad
# .fi
#	The Secure Mailer license must be distributed with this software.
# AUTHOR(S)
#	Wietse Venema
#	IBM T.J. Watson Research
#	P.O. Box 704
#	Yorktown Heights, NY 10598, USA
#--

# Avoid POSIX death due to SIGHUP when some parent process exits.

trap '' 1

case $daemon_directory in
"") echo This script must be run by the postfix command. 1>&2
    echo Do not run directly. 1>&2
    exit 1
esac

LOGGER="$command_directory/postlog -t $MAIL_LOGTAG/postfix-script"
INFO="$LOGGER -p info"
WARN="$LOGGER -p warn"
ERROR="$LOGGER -p error"
FATAL="$LOGGER -p fatal"
PANIC="$LOGGER -p panic"

umask 022
SHELL=/bin/sh

#
# Can't do much without these in place.
#
cd $command_directory || {
	$FATAL no Postfix command directory $command_directory!
	exit 1
}
cd $daemon_directory || {
	$FATAL no Postfix daemon directory $daemon_directory!
	exit 1
}
test -f master || {
	$FATAL no Postfix master program $daemon_directory/master!
	exit 1
}
cd $config_directory || {
	$FATAL no Postfix configuration directory $config_directory!
	exit 1
}
cd $queue_directory || {
	$FATAL no Postfix queue directory $queue_directory!
	exit 1
}

#
# Parse JCL
#
case $1 in

start_msg)

	echo "Start postfix"
	;;

stop_msg)

	echo "Stop postfix"
	;;

start)

	$daemon_directory/master -t 2>/dev/null || {
		$FATAL the Postfix mail system is already running
		exit 1
	}
	if [ -f $queue_directory/quick-start ]
	then
		rm -f $queue_directory/quick-start
	else
		$config_directory/postfix-script check-fatal || {
			$FATAL Postfix integrity check failed!
			exit 1
		}
		# Foreground this so it can be stopped. All inodes are cached.
		$config_directory/postfix-script check-warn
	fi
	$INFO starting the Postfix mail system
	$daemon_directory/master &
	;;

drain)

	$daemon_directory/master -t 2>/dev/null && {
		$FATAL the Postfix mail system is not running
		exit 1
	}
	$INFO stopping the Postfix mail system
	kill -9 `sed 1q pid/master.pid`
	;;

quick-stop)

	$config_directory/postfix-script stop
	touch $queue_directory/quick-start
	;;

stop)

	$daemon_directory/master -t 2>/dev/null && {
		$FATAL the Postfix mail system is not running
		exit 1
	}
	$INFO stopping the Postfix mail system
	kill `sed 1q pid/master.pid`
	for i in 5 4 3 2 1
	do
	    $daemon_directory/master -t && exit 0
	    $INFO waiting for the Postfix mail system to terminate
	    sleep 1
	done
	$WARN stopping the Postfix mail system with force
	pid=`awk '{ print $1; exit 0 } END { exit 1 }' pid/master.pid` && 
		kill -9 -$pid
	;;

abort)

	$daemon_directory/master -t 2>/dev/null && {
		$FATAL the Postfix mail system is not running
		exit 1
	}
	$INFO aborting the Postfix mail system
	kill `sed 1q pid/master.pid`
	;;

reload)

	$daemon_directory/master -t 2>/dev/null && {
		$FATAL the Postfix mail system is not running
		exit 1
	}
	$INFO refreshing the Postfix mail system
	$command_directory/postsuper active || exit 1
	kill -HUP `sed 1q pid/master.pid`
	$command_directory/postsuper &
	;;

flush)

	cd $queue_directory || {
		$FATAL no Postfix queue directory $queue_directory!
		exit 1
	}
	$command_directory/postqueue -f
	;;

check)

	$config_directory/postfix-script check-fatal || exit 1
	$config_directory/postfix-script check-warn
	exit 0
	;;

check-fatal)
	# This command is NOT part of the public interface.

	$SHELL $config_directory/post-install create-missing || {
		$WARN unable to create missing queue directories
		exit 1
	}

	# Look for incomplete installations.

	test -f $config_directory/master.cf || {
		$FATAL no $config_directory/master.cf file found
		exit 1
	}

	# See if all queue files are in the right place. This is slow.
	# We must scan all queues for mis-named queue files before the
	# mail system can run.

	$command_directory/postsuper || exit 1
	exit 0
	;;

check-warn)
	# This command is NOT part of the public interface.

	for dir in $daemon_directory $config_directory $queue_directory
	do
		ls -lLd $dir | (grep " root " >/dev/null ||
		    $WARN not owned by root: $dir)
	done

	find $daemon_directory/* $config_directory/* ! -user root \
		-exec $WARN not owned by root: {} \;

	find $daemon_directory/. $config_directory/. \
		\( -perm -020 -o -perm -002 \) -type f \
		-exec $WARN group or other writable: {} \;

	find `ls -d $queue_directory/* | \
	    egrep '/(incoming|active|defer|deferred|bounce|hold|trace|corrupt|public|private|flush)$'` \
	    ! \( -type p -o -type s \) ! -user $mail_owner \
		-exec $WARN not owned by $mail_owner: {} \;

	find $queue_directory/public $queue_directory/maildrop \
	    $command_directory/postqueue $command_directory/postdrop \
	    -prune ! -group $setgid_group \
	    -exec $WARN not owned by group $setgid_group: {} \;

	find $command_directory/postqueue $command_directory/postdrop \
	    -prune ! -perm -02111 \
	    -exec $WARN not set-gid or not owner+group+world executable: {} \;

	for name in `ls -d $queue_directory/* | \
	    egrep '/(bin|etc|lib|usr)$'` ; \
	do \
	    find $name ! -user root \
		-exec $WARN not owned by root: {} \; ; \
	done

	# WARNING: this should not descend into the maildrop directory.
	# maildrop is the least trusted Postfix directory.

	find $queue_directory/maildrop/. -prune ! -user $mail_owner \
	    -exec $WARN not owned by $mail_owner: $queue_directory/maildrop \;

	for dir in bin etc lib sbin usr
	do
		test -d $dir && find $dir -type f -print | while read path
		do
			test -f /$path && {
			    cmp -s $path /$path || 
				$WARN $queue_directory/$path and /$path differ
			}
		done
	done

	find corrupt -type f -exec $WARN damaged message: {} \;

	# XXX also: look for weird stuff, weird permissions, etc.

	test -f /usr/sbin/sendmail -a -f /usr/lib/sendmail && {
	    cmp -s /usr/sbin/sendmail /usr/lib/sendmail || {
		$WARN /usr/lib/sendmail and /usr/sbin/sendmail differ
		$WARN Replace one by a symbolic link to the other
	    }
	}
	exit 0
	;;

set-permissions|upgrade-configuration)
	$config_directory/post-install create-missing "$@"
	;;

post-install)
	# Currently not part of the public interface.
	shift
	$config_directory/post-install "$@"
	;;

/*)
	# Currently not part of the public interface.
	"$@"
	;;

*)

	$FATAL "usage: postfix start (or stop, reload, abort, flush, check, set-permissions, upgrade-configuration)"
	exit 1
	;;

esac
