#!/bin/sh
PREFIX=$(expr $0 : "\(/.*\)/bin/$(basename $0)\$") || exit 1

if [ -r $PREFIX/etc/utcount.conf ]; then
	. $PREFIX/etc/utcount.conf
else
	exit 1
fi

TMPDIR=$user_tmpdir
export TMPDIR
tmpfile=`mktemp -q -u -t count` || exit 1

cleanup ()
{
	rm -f $tmpfile.?
}

trap : 1
trap : 2
trap : 15
set -T
trap "cleanup; exit" 1 2 15

bindir=$PREFIX/bin

count_eval=""
for progname in $user_list
do
	if [ $count_eval ] ; then
		count_eval="$count_eval ; $bindir/count_$progname"
	else
		count_eval="$bindir/count_$progname"
	fi
done

count_num=0
touch $tmpfile.$count_num

while [ ! ]
do
	if ! ps $PPID >/dev/null 2>&1
	then
		echo "Parent process died. Cleanup and exit." >&2
		break
	fi
	count_old=$count_num
	test $count_num -eq 1
	count_num=$?
	eval $count_eval | tee $tmpfile.$count_num \
	| diff -b -u $tmpfile.$count_old - \
	| grep "^[+-] [a-z]" | sort -r
	sleep $user_sleeptime
done
cleanup