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#!/bin/bash
# Author: Robert Martin
# Checks sysctl variable vaues on OSX to see if they are large enough
# to handle the shared memory requirements for ION
# documentation boilerplate
echo "########################################"
echo
pwd | sed "s/\/.*\///" | xargs echo "NAME: "
echo
echo "PURPOSE: Determine if an Apple OSX host has the minimum memory required
for ION to run properly."
echo
echo "CONFIG: None"
echo
echo "OUTPUT: If the host is Apple OSX and memory is not sufficient, then you
will be informed how to edit system configuration files to meet minimum
memory requirements."
echo
echo "########################################"
if ! sw_vers 2> /dev/null > /dev/null; then
echo "Not an OSX system, skipping test"
exit 2
fi
VAR_LIST=('shmmax' 'shmmin' 'shmmni' 'shmseg' 'shmall')
VAR_VALUE=(20971520 1 32 128 8192)
CUR_VALUE=0
I=0
CHANGE=0
echo
echo "If any lines appear below, copy and paste them into /etc/sysctl.conf and reboot."
while [[ "$I" -lt "5" ]]; do
CUR_VALUE=`sysctl kern.sysv.${VAR_LIST[$I]} | awk '{ print $2 }'`
#echo "Checking kern.sysv.${VAR_LIST[$I]} $CUR_VALUE ${VAR_VALUE[$I]}"
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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