Shell Programming and Scripting

#
# Configure telnet access - root can always telnet to the server
#
if [ -f /etc/telnet.allow ] ; then
user_id=${LOGNAME}
telnetused=`/usr/bin/ps -f | grep "[t]elnetd" | grep -v "grep" | wc -l`
if [ -s /etc/telnet.allow ] ; then
userallowcount=`grep "^$user_id$" /etc/telnet.allow | wc -l`
else
userallowcount=0
fi
if [ $telnetused -gt 0 -a $userallowcount -eq 0 -a "Xroot" != "X${LOGNAME}" ] ; then
DATEE=`/usr/bin/date +%Y%m%d`
TIMEE=`/usr/bin/date +%H%M%S`
NDNAME=`/usr/bin/uname -n`
BASENM=`/usr/bin/basename $0`
#if [ -f /etc/ALIASNAME ] ; then
# ALIASNAME=`cat /etc/ALIASNAME`
#fi

echo "ERMS1311: Error - Telnet access is not allowed... Terminating"

if [ -f /usr/bin/logger ] ; then
/usr/bin/logger -t "login" "ERMS1311: Error - Telnet access for ${LOGNAME} is not allowed... Terminating...
"
fi
echo "ERMS1001: Error - YOU DO NOT HAVE TELNET ACCESS TO THIS SERVER"
echo "SESSION TERMINATING IN 10 SECONDS"
echo "${DATEE} : ${TIMEE} : ${NDNAME} : ${user_id} : ERMS1311 Telnet access not allowed" >> /var
/adm/log/security/telnet_deny.log
sleep 10
exit 99
fi
fi

if [ $(ps -ef |grep "telnetd"|grep -cv grep) -gt 0 -a "$LOGNAME" != "root" ]; then
### do your error stuff and exit
fi

if [ $(grep -c "$LOGNAME" /etc/telnet.allow) -eq 1 -a $(ps -ef |grep "telnetd"|grep "$LOGNAME" |grep -cv grep) -gt 1 -a "$LOGNAME" != "root" ]; then
### do your error stuff
fi