#! /sbin/sh
#Tag 0x00000f00

# Start sendmail demon after checking that things are healthy.
# $Revision: 1.63 $

CONFIG=/etc/config
IS_ON=/sbin/chkconfig

QUEUEDIR=/var/spool/mqueue
MAILDIR=/var/mail

G_RC=/usr/local/etc/mgmt/rc

if $IS_ON verbose ; then	# For a verbose startup and shutdown
    ECHO=echo
    VERBOSE=-v
else				# For a quiet startup and shutdown
    ECHO=:
    VERBOSE=
fi


if $IS_ON cap_su_off && test "`sysconf MAC`" -eq 1; then
    CSU=csu_off
    csu_off () {
	while true; do
	    case "$1" in
	    -M) shift 2;;
	    -M?*) shift;;
	    -m) shift;;
	    -C) shift 2;;
	    -C?*) shift;;
	    *) break;;
	    esac
	done
	shift
	eval $*
	return
    }
else
    CSU="/sbin/suattr"
fi
CSU_DBADMIN="$CSU -M dbadmin"
CAP_SENDMAIL="CAP_PRIV_PORT+ip"


parse_args () {
    OPTS=""
    while true; do
	case "$1" in
	-q) DOPTS="$DOPTS $1$2"; shift 2;;
	-q?*) DOPTS="$DOPTS $1"; shift;;
	-bd) shift;;
	"") break;;
	*) OPTS="$OPTS $1"; shift;;
	esac
    done
    if test "$DOPTS" = ""; then
	DOPTS="-bd -q15m"
    else
	DOPTS="-bd $DOPTS"
    fi
    return
}

case "$1" in
'start')
    $ECHO "Mailer daemons: \c"

    # Choose sendmail options.  The file might contain something like -om
    #	to turn on "metoo"
    OPTS=`cat $CONFIG/sendmail.options 2>/dev/null`

    # Force $G if Gauntlet appears to be installed.
    if [ -f /etc/init.d/gauntlet ]; then
	if expr "$OPTS" : "oMGgauntlet" >/dev/null; then
	    OPTS="$OPTS -oMGgauntlet"
	fi
	$G_RC/S100mail stop
    fi
    parse_args $OPTS

    # Move to post office directory
    if $CSU -m -c "test ! -d ${MAILDIR} -a ! -L ${MAILDIR}"; then
	mkdir -m 775 ${MAILDIR}
	if test "`sysconf MAC`" -eq 1; then
	    chlabel -m ${MAILDIR}
	fi
    fi
    olddir="`pwd`"
    cd ${MAILDIR}
    if test $? = 0; then
	cd ${olddir}
	if test "`sysconf MAC`" -eq 1; then
	    files=`$CSU -m -C CAP_MAC_READ+ipe -c "echo ${MAILDIR}/[A-Z]-[a-z]*"`
	    for f in $files; do
		label=`$CSU -m -C CAP_MAC_READ+ipe -c "ls -1Md $f"	\
			| awk '{print $2}'				\
			| sed -e 's!\[!!' -e 's!\]!!'`
		if $CSU -M $label -c "test ! -d ${MAILDIR}/:saved"; then
		    $CSU -M $label -c "mkdir ${MAILDIR}/:saved"
		fi
		$CSU -M $label -C CAP_FOWNER+ipe			\
		    -c "chown root ${MAILDIR}/. ${MAILDIR}/:saved ;	\
			/sbin/find ${MAILDIR}/. -local -exec chgrp mail {} \\; \
						-exec chmod g+w {} \\;"
	    done
	else
		if test ! -d ${MAILDIR}/:saved ; then
			mkdir -m 775 ${MAILDIR}/:saved
		fi
		$CSU -C CAP_FOWNER+ipe					\
		    -c "chown root.mail ${MAILDIR}/. ${MAILDIR}/:saved ; \
			/sbin/find ${MAILDIR}/. -local			\
			    \\( ! -group mail -o ! -perm -020 \\)	\
			    -exec chgrp mail {} \\;			\
			    -exec chmod g+w {} \\;"
	fi
    fi

    # Move to spool directory.  Make sure the directory exists, and is of the
    # proper permissions
    if test ! -d /var/spool; then
	mkdir /var/spool
    fi
    if $CSU_DBADMIN -c "test ! -d ${QUEUEDIR}/."; then
	$CSU_DBADMIN -c "mkdir -m 755 ${QUEUEDIR}"
    fi
    $CSU_DBADMIN -C CAP_FOWNER+ipe -c "chmod 755 ${QUEUEDIR}/.;	\
				chown root.mail ${QUEUEDIR}/."

    # Make sure that /usr/lib/sendmail is executable and setuid root
    if test ! -x /usr/lib/sendmail; then
	echo "mail: no /usr/lib/sendmail, can't use mail"
	exit 255
    fi

    # check the alias data base
    if test ! -r /etc/aliases; then
	echo "mail: /etc/aliases is missing, can't use mail"
	exit 255
    fi
    if test ! -r /etc/aliases.dir -o ! -r /etc/aliases.pag; then
	touch /etc/aliases.dir /etc/aliases.pag
	sleep 1
	touch /etc/aliases
    fi

    # Make sure that /bin/mail is correct
    if test ! -x /bin/mail; then
	echo "mail: no /bin/mail, can't use mail"
	exit 255
    fi

    if test ! -c /dev/log; then
	echo "mail: syslogd is not running, /dev/log does not exist"
	exit 255
    fi

    # kill any old daemons
    $CSU_DBADMIN -c "/sbin/killall -15 sendmail"

    # Clean up any old lock files
    $CSU_DBADMIN -c "rm -rf ${QUEUEDIR}/[tnx]f*" >/dev/null 2>&1

    # If both smap and sendmail chkconfig'ed on, smap does and should prevail.
    if $IS_ON smap; then
	if test ! -d /usr/spool/smap; then
		mkdir -m 755 -p /usr/spool/smap
		chown smap /usr/spool/smap
	fi
	# /etc/sendmail.fc necessary since sendmail is still delivery agent
	if test -s /etc/sendmail.fc; then
	    (echo "Freezing sendmail.cf" ;
		/usr/lib/sendmail -bz) | logger -t sendmail
	fi
	# ignore SIGHUP from init, so backgrounded demons will not be killed
	trap "" 1

	# smap and other Gauntlet support is delt with in the gauntlet mail
	# startup script
	if [ -f /etc/init.d/gauntlet ]; then
	    $G_RC/S100mail start
	fi

    elif $IS_ON sendmail; then
	# start the daemon.
	if test -s /etc/sendmail.fc; then
	    FRZ="echo Freezing sendmail.cf; /usr/lib/sendmail -bz; "
	fi
	# start in background because starting can take a while
	$CSU_DBADMIN -C $CAP_SENDMAIL -c		\
		"$FRZ /usr/lib/sendmail $DOPTS $OPTS"	\
	    | logger -t sendmail &
	$ECHO "sendmail."

    else
	$ECHO "none."
    fi

    # rebuild aliases just in case, but after freezing sendmail.cf.
    $CSU_DBADMIN -c "rm -f /etc/aliases.pag /etc/aliases.dir /etc/aliases.db"
    newaliases >/dev/null &
    ;;

'stop')
    $CSU_DBADMIN -c "/sbin/killall -15 sendmail"
    if [ -f /etc/init.d/gauntlet ]; then
	$G_RC/S100mail stop
    fi
    ;;

*)
    echo "usage: $0 {start|stop}"
    ;;
esac