UNIX for Dummies Questions & Answers

# cat cron
#!/sbin/sh
#
# Copyright (c) 1997-1998 by Sun Microsystems, Inc.
# All rights reserved.
#
#ident  "@(#)cron       1.13    98/04/19 SMI"

case "$1" in
'start')
        if [ -p /etc/cron.d/FIFO ]; then
                if /usr/bin/pgrep -x -u 0 -P 1 cron >/dev/null 2>&1; then
                        echo "$0: cron is already running"
                        exit 0
                fi
        fi

        if [ -x /usr/sbin/cron ]; then
                /usr/bin/rm -f /etc/cron.d/FIFO
                /usr/sbin/cron &
        fi
        ;;

'stop')
        /usr/bin/pkill -x -u 0 -P 1 cron
        ;;

*)
        echo "Usage: $0 { start | stop }"
        exit 1
        ;;
esac
exit 0

# cat sendmail
#!/sbin/sh
#
# Copyright (c) 1992, 1995, 1997 - 2000 by Sun Microsystems, Inc.
# All rights reserved.
#
#ident  "@(#)sendmail   1.16    00/09/06 SMI"

ERRMSG1='WARNING: /var/mail is NFS-mounted without setting actimeo=0,'
ERRMSG2='this can cause mailbox locking and access problems.'

case "$1" in
'start')
        if [ -f /usr/lib/sendmail -a -f /etc/mail/sendmail.cf ]; then
                if [ ! -d /var/spool/mqueue ]; then
                        /usr/bin/mkdir -m 0750 /var/spool/mqueue
                        /usr/bin/chown root:bin /var/spool/mqueue
                fi
                MODE="-bd"
                if [ -f /etc/default/sendmail ]; then
                        . /etc/default/sendmail
                fi
                #
                # * MODE should be "-bd" or null (MODE= or MODE="") or
                #   left alone.  Anything else and you're on your own.
                # * QUEUEINTERVAL should be set to some legal value;
                #   a sanity check is done below.
                # * OPTIONS is a catch-all; set with care.
                #
                if [ -z "$QUEUEINTERVAL" ]; then
                        QUEUEINTERVAL="15m"
                fi
                case $QUEUEINTERVAL in
                        *s | *m | *h | *d | *w) ;;
                        *)  QUEUEINTERVAL="15m" ;;
                esac
                if [ $QUEUEINTERVAL -le 0 ]; then
                        QUEUEINTERVAL="15m"
                fi
                /usr/lib/sendmail $MODE -q$QUEUEINTERVAL $OPTIONS &
                #
                # ETRN_HOSTS should be of the form
                # "s1:c1.1,c1.2        s2:c2.1 s3:c3.1,c3.2,c3.3"
                # i.e., white-space separated groups of server:client where
                # client can be one or more comma-separated names; N.B. that
                # the :client part is optional; see etrn(1M) for details.
                # server is the name of the server to prod; a mail queue run
                # is requested for each client name.  This is comparable to
                # running "/usr/lib/sendmail -qRclient" on the host server.
                #
                # See RFC 1985 for more information.
                #
                for i in $ETRN_HOSTS; do
                        SERVER=`echo $i | /usr/bin/sed -e 's/:.*$//'`
                        CLIENTS=`echo $i | /usr/bin/sed -n -e 's/,/ /g' \
                            -e '/:/s/^.*://p'`
                        /usr/sbin/etrn $SERVER $CLIENTS >/dev/null 2>&1 &
                done
        fi

        if /usr/bin/nawk 'BEGIN{s = 1}
            $2 == "/var/mail" && $3 == "nfs" && $4 !~ /actimeo=0/ &&
            $4 !~ /noac/{s = 0} END{exit s}' /etc/mnttab; then

                /usr/bin/logger -p mail.crit "$ERRMSG1"
                /usr/bin/logger -p mail.crit "$ERRMSG2"
        fi
        ;;

'stop')
        /usr/bin/pkill -x -u 0 sendmail
        ;;

*)
        echo "Usage: $0 { start | stop }"
        exit 1
        ;;
esac
exit 0

# cd /etc/rc2.d
# ln /etc/init.d/cron S75cron
# ln /etc/init.d/sendmail S88sendmail

# cd /etc/rc0.d
# ln /etc/init.d/cron K40cron
# ln /etc/init.d/sendmail K36sendmail
# cd /etc/rc1.d
# ln /etc/init.d/cron K40cron
# ln /etc/init.d/sendmail K36sendmail
# cd /etc/rcS.d
# ln /etc/init.d/cron K40cron
# ln /etc/init.d/sendmail K36sendmail