#!/bin/bash
#
# construct .ms file from this node for parasol hub controller
#
if [ $# -ne 2 ]; then
  printf "usage: nodeReport.sh N nodeInfoDir
where N is the number of CPUs to reserve outside parasol processes
use N=0 for a fully dedicated parasol node machine to use all CPUs
use N=2 for a shared computer to reserve 2 CPUs for OS and
  the parasol hub process.
and 'nodeInfoDir' is the directory to write the result file into
e.g.:  nodeReport 2 /data/parasol/nodeInfo
reserves 2 CPUs and writes the result file to:
  /data/parasol/nodeInfo/<ipAddr>.ms
where <ipAddr> is the internal LAN address of this machine
NOTE: works only on Linux, does not function correctly on Mac OSX\n" 1>&2
  exit 255
fi
reserveCPUs=$1
nodeInfoDir=$2
myIp=`/usr/sbin/ip addr show | egrep "inet.*eth0|inet.*em1" | awk '{print $2}' | sed -e 's#/.*##;'`
memSizeMb=`grep -w MemTotal /proc/meminfo  | awk '{print 1024*(1+int($2/(1024*1024)))}'`
cpuCount=`grep processor /proc/cpuinfo | wc -l`
useCPUs=$(expr $cpuCount - $reserveCPUs)
if [ "${useCPUs}" -lt 1 ]; then
useCPUs=1
fi
memTotal=`echo $memSizeMb $cpuCount | awk '{printf "%d", $1, $2}'`
devShm=`df -k /dev/shm | grep dev/shm | awk '{printf "%d\n", 512*(1+int($2/(1024*1024)))}'`
printf "%s\t%d\t%d\t/dev/shm\t/dev/shm\t%s\tbsw\n" "${myIp}" "${useCPUs}" "${memTotal}" "${devShm}" > "${nodeInfoDir}"/${myIp}.ms