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#!/bin/bash

USER=$(whoami)
console_name="OpenSim_console"
screen_session=opensim/${console_name}
screen_check="screen -ls opensim/"
osversion="current"
bindir=/opt/opensim/${osversion}/bin
quiet=""

if [ "$1" = "-q" ]
then
    quiet="true"
    shift 1
fi
   
if [ "x$1" = "x" ]; then
    pathname=$(pwd)
    tgt=$(basename $pathname)
elif [ -d "./$1" ]; then
    tgt=$1
elif [ -d "./sim$1" ]; then
    tgt=sim$1
fi

if [ "x$tgt" = "x" ]; then
    echo "usage:"
    echo "    $ $(basename $0) <sim>"
    echo "where <sim> is one of: " robust sim[0-9][0-9]
    exit 1
fi

if [ $USER = "opensim" ]
then
    SUDO=""
else
    SUDO="sudo -Hu opensim"
fi

# Would be nice if this worked.
export MONO_PATH=${bindir}
# Then we would not have to do this, and subsequently write all over the damn bin directory.
cd ${bindir}

if ($screen_check | grep -q ${console_name}); then
    true
else
    $SUDO screen -d -m -S ${console_name}
fi

if [ "x$tgt" = "xrobust" ]; then
    exe="Robust"
else
    exe="OpenSim"
fi

inidir=/opt/opensim/config/${tgt}
# Grab the first line of the sim.ini file, it should be the sim name in square brackets.
title=$(head -n 1 ${inidir}/Regions/sim.ini )
# Strip off spaces at either end.
shopt -s extglob
title=${title##*( )}
title=${title%%*( )}
shopt -u extglob
# Strip off the square brackets at either end.
title=${title:1:$(( ${#title} - 2 ))}

case $(basename $0) in 
    "start-sim")
	cmd="/usr/bin/mono ${bindir}/${exe}.exe -inidirectory=${inidir} -logconfig=${inidir}/${exe}.exe.config"

	# Check if it's already running.
	if [ ! -e /var/run/opensim/${tgt}.pid ]
	then
	    $SUDO screen -r ${screen_session} -p "-" -X screen -t "[${title}]" ${cmd}
	fi
	;&

    "sim-console")
	if [ "x$quiet" = "x" ]
	then
	    screen -r ${screen_session} -p "[${title}]" -A
	fi
	;;

    "backup-sim")
	# Substitute underscores for spaces in the title, then add the full date and time to create the OAR file name.
	cmd="save oar ${inidir}/../../backups/${title// /_}-$(date '+%F_%T').oar"
	sudo -Hu opensim screen -r opensim/OpenSim_console -p "[${title}]" -X stuff "${cmd}$(/bin/echo -ne '\015')"
	;;

    "stop-sim")
	sudo -Hu opensim screen -r opensim/OpenSim_console -p "[${title}]" -X stuff "shutdown$(/bin/echo -ne '\015')"
	;;
esac