#!/bin/sh
#--
#-- IBMhpc.postinstall
#--    Run this script from your <profile>.postinstall to perform the following
#--    general setup in your diskless image for your HPC cluster:
#--        - create entries in /etc/fstab for basic filesystems 
#--        - enables the "cons" entry in /etc/inittab
#--        - create initial copies of /etc/passwd and other files in the image
#--        - turn on the "at" service
#--        - turn on xinetd
#--        - 
#--
#-- it gets these arguments:
#--
#-- $1 = install root (chroot directory for profile)
#-- $2 = OS version
#-- $3 = architecture
#-- $4 = profile name
#-- $5 = work dir (where genimage is located)
#--
#--
installroot=$1
osver=$2
arch=$3
profile=$4
workdir=$5

#-- Generate /etc/fstab automatically during image generation:
#--    adjust filesystem sizes as needed for your cluster
cat <<END >$installroot/etc/fstab
proc            /proc    proc   rw 0 0
sysfs           /sys     sysfs  rw 0 0
devpts          /dev/pts devpts rw,gid=5,mode=620 0 0
#${profile}_${arch}      /        tmpfs  rw 0 1
none            /tmp     tmpfs  defaults,size=3g 0 2
none            /var/tmp tmpfs  defaults,size=1g 0 2
END

#-- Uncomment the "cons" entry in /etc/inittab
#cons:12345:respawn:/sbin/smart_agetty -L 38400 console
TMP_inittab=`sed 's/\(#\)\(cons:12345.*\)$/\2/' $installroot/etc/inittab`
echo "$TMP_inittab" > $installroot/etc/inittab

# Create initial copies of /etc/passwd and others in case they are needed
# by other postscripts
# If you would like xCAT to keep these up to date,
# use the xCAT syncfiles function which runs during 
# packimage/liteimage and at other times
cp -p /etc/passwd $installroot/etc/passwd
cp -p /etc/group $installroot/etc/group
cp -p /etc/shadow $installroot/etc/shadow
cp -p /etc/hosts $installroot/etc/hosts

# Turn on 'at' service
chroot $installroot chkconfig atd on

# Turn on xinetd
chroot $installroot chkconfig xinetd on

# Modify some ulimits
if [ ! -f $installroot/etc/sysconfig/ulimit.XCAT_BAK ]; then
  cp -p $installroot/etc/sysconfig/ulimit $installroot/etc/sysconfig/ulimit.XCAT_BAK
fi
if [ -f $installroot/etc/sysconfig/ulimit ]; then
    # max locked memory
    /usr/bin/sed -i 's/HARDLOCKLIMIT=.*/HARDLOCKLIMIT="unlimited"/g'  $installroot/etc/sysconfig/ulimit
    /usr/bin/sed -i 's/SOFTLOCKLIMIT=.*/SOFTLOCKLIMIT="unlimited"/g'  $installroot/etc/sysconfig/ulimit
    # max memory size
    /usr/bin/sed -i 's/HARDRESIDENTLIMIT=.*/HARDRESIDENTLIMIT="unlimited"/g'  $installroot/etc/sysconfig/ulimit
    /usr/bin/sed -i 's/SOFTRESIDENTLIMIT=.*/SOFTRESIDENTLIMIT="unlimited"/g'  $installroot/etc/sysconfig/ulimit
fi