From: Joe Crawford (abjcrawford@yahoo.com)
Date: Tue Jan 18 2005 - 11:48:38 EST
Team:
Thanks much for the responses for my earlier question
reg 100% CPU (I guess the problem was with nslookup
command going in infinite loop following the dns
failure). I have attached the script for some comments
from the Gurus. Please advise.
Best Regards
Joe.
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#!/sbin/sh
######################################################################
#
# Script
# Name: update_hostlist_rhosts.sh
#
# Comments: This script get the master & slave nclass server list
# and it overwrites the .rhosts file under all the
# user's home directory with the updated list. This script runs once in
# a day through the cronjob.
#
#
#
################## MODIFICATION HISTORY ###############################
# AUTHOR DATE CHANGED CHANGE HISTORY VERSION
#-----------------------------------------------------------------------------
# Changed the logic to get
# the Master & Slave host
# Modified the logic to take user's home directory
# from /etc/passwd.nis file
# Modified the logic to take full host name to put in to the
# users .rhosts file
#
###############################################################################
Add_rhost_entry()
{
user_group="CITRIX"
hostlist=`cat /tmp/hostlist`
no_lines=`cat /etc/passwd.nis | wc -l`
cur_line=1
while [ $cur_line -le $no_lines ]
do
one=`cat /etc/passwd.nis | head -$cur_line | tail -1`
user_id=`echo $one| awk -F':' '{print $1}'`
HomeDir=`echo $one| awk -F':' '{print $6}'`
GroupID=`echo $one| awk -F':' '{print $4}'`
if [ -d $HomeDir -a $GroupID = 500 ]
then
for hostname in $hostlist
do
# Added to have full host name with domain in users .rhosts file
full_host=`/usr/bin/nslookup $hostname | grep -v "Name Server" | grep Name | cut -f2 -d":" | xargs`
grep "$full_host $user_id" $HomeDir/.rhosts >/dev/null 2>&1
if [ $? -ne 0 ]
then
echo "$full_host $user_id" >> $HomeDir/.rhosts
fi
full_host_ip=`getip $full_host`
grep "$full_host_ip $user_id" $HomeDir/.rhosts >/dev/null 2>&1
if [ $? -ne 0 ]
then
echo "$full_host_ip $user_id" >> $HomeDir/.rhosts
fi
done
chmod 600 $HomeDir/.rhosts
chown $user_id:$user_group $HomeDir/.rhosts
fi
let cur_line=$cur_line+1
done
rm /tmp/hostlist 2>/dev/null
}
get_hostlist()
{
ypwhich -m ypservers>/tmp/hostlist
ypcat ypservers | grep -v `ypwhich -m ypservers` | tr -s " " "\n">>/tmp/hostlist
}
######################################################################
#
# MAIN SCRIPT
#
######################################################################
echo "##################`date`#################"
get_hostlist
Add_rhost_entry
--
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