#!/bin/bash

# proj3.sh

USAGE="Usage: $0 [-h] -[ s confdir | c ]"


function server {
	progname="${0%\.*}"
	
	#deal with the PID file
	if [ -e "$progname.pid" ]; then
		echo "$progname is already running." >&2
		exit 1
	else
		echo $$ > "$progname.pid"
	fi
	
	#bring values from conffile into current context
	source $progname.conf
	
	#ok here it's time to trap signals
	trap "echo $( pwd ) > $TTY" INT
	trap "echo $( pwd ) > $TTY" USR1
	trap "" USR2
	
	trap -p > $TTY
	
	while true; do
		sleep 1;
	done
}



while getopts "hs:c" opt; do
	case $opt in
		s) #servertime
			if [ -t 0 ]; then
				export TTY=$(tty)
				exec $0 $@ <&- >&- &
			else
				server $OPTARG
			fi
			printf "";;
		c) #clienttime
			client;;
		h|*) echo $USAGE >&2; exit 1;;
	esac
done

if [[ -z "$@" ]]; then
	echo $USAGE >&2
	exit 1
fi

shift $((OPTIND - 1))