Shell Programming and Scripting

#!/bin/csh -f
#
# Created 02/09/00 HOG Script to change this system to SECONDARY oracle
server
#                       O/S side only.
#
# Script checks for files needed - if any changes from certain files 
have
been
#   done without updating other files then this script will exit so a
failure
#   of both primary and secondary servers does not occur.
# ====================================================================
set dtf_change = "Y"
set defdir = "/usr/local/dtf-change"
set thishost = "`hostname`"
set thisip = "`grep $thishost /etc/hosts | grep loghost | awk '{print 
$1}'`"
set primhost = "oracle"
set sechost = "oracle2"
set primip = "172.16.1.14"
set secip = "172.16.1.142"
set tmpfile = "/tmp/dtf-change.tmp"
set allfiles = "$defdir/hosts.primary $defdir/hosts.secondary
$defdir/defaultrou
ter.primary $defdir/defaultrouter.secondary"
# ------------------------------------------------------------
# Check for all files needed to change 
foreach newfile ($allfiles)
        if (-e $newfile ) then
        else
                echo "File $newfile does not exist - no changes made"
                set dtf_change = "N"
        endif
end
if ("$dtf_change" == "Y") echo "All needed files exist."
#
/usr/bin/diff $defdir/hosts.secondary /etc/hosts > $tmpfile
if (-z $tmpfile) then
        echo "This system may already be the secondary Oracle server"
        set dtf_change = "N"
endif
/usr/bin/diff $defdir/hosts.primary /etc/hosts > $tmpfile
if (-z $tmpfile ) then
        echo "This system seems to be the primary Oracle server"
else
        set dtf_change = "N"
endif
/usr/bin/diff $defdir/defaultrouter.secondary /etc/defaultrouter > 
$tmpfile
if (-z $tmpfile != 0) then
        echo "Default router is for secondary."
        set dtf_change = "N"
endif
if ("$thishost" == "$sechost") then
        echo "This is the secondary Oracle host"
        set dtf_change = "N"
endif
if ("$dtf_change" == "N") then
        # something is missing - do not continue
        goto enditall
endif
#
echo "Changing this system from primary to secondary Oracle server."
#
echo "" ; echo -n "Moving Oracle startup..."
cp /etc/rc2.d/S99dbora /etc/rc2.d/s99dbora ; echo "Done."
#  -------- MOVE NEW HOST TABLE ------
echo "" ; echo -n "Moving Host table..."
cp $defdir/hosts.secondary /etc/inet/hosts.new
chmod 444 /etc/inet/hosts ; chgrp sys /etc/hosts ; echo "Done."
#  -------- CHANGE DEFAULT ROUTE FILE ------
echo "" ; echo -n "Moving default route file..."
cp $defdir/defaultrouter.secondary /etc/defaultrouter.new 
chmod 644 /etc/defaultrouter; echo "Done."
#  -------- SET HOST NAME ------
echo ""; echo -n "Setting hostname to $sechost..."
/usr/bin/hostname $sechost ; echo "Done."
#  -------- All done -----------
echo "";echo "This system is ready to be rebooted - enter init 6."
echo "This system ($thishost) will come back up as $sechost."
echo "Remember that Oracle will not start automatically. See your DBA 
for
help"
#
enditall:
exit