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#!/bin/bash
# Author: Robert Martin, Ohio University
# Checks sysctl variable vaues on OSX to see if they are large enough
# to handle the shared memory requirements for ION
if [[ $OSTYPE != *darwin* ]]; then
echo "Not an OSX system, exiting script"
exit 0
fi
VAR_LIST=('shmmax' 'shmmin' 'shmmni' 'shmseg' 'shmall')
VAR_VALUE=(10485760 1 32 32 4096)
CUR_VALUE=0
I=0
CHANGE=0
echo
echo "If any lines appear below, copy and paste them into /etc/sysctl.conf and reboot."
echo "If /etc/sysctl.conf does not yet exist, create it."
while [[ $I -lt 5 ]]; do
CUR_VALUE=`sysctl kern.sysv.${VAR_LIST[$I]} | awk '{ print $2 }'`
if [[ $CUR_VALUE -lt ${VAR_VALUE[$I]} ]]; then
echo "kern.sysv.${VAR_LIST[$I]}=${VAR_VALUE[I]}"
let CHANGE=1
fi
let I=$I+1
done
if [[ $CHANGE == 0 ]]; then
echo
echo "This system's shared memory is ready to run ION."
echo "No changes are needed."
exit 0
fi
#If there's a problem, we exit with an error
exit 1
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