#! /bin/sh
# lock the news system & arrange to unlock later
# =()<. ${NEWSCONFIG-@<NEWSCONFIG>@}>()=
. ${NEWSCONFIG-/usr/local/libexec/cnews/config}

oldpath="${PATH-$NEWSPATH}"
newpath=$NEWSCTL/bin:$NEWSBIN:$NEWSPATH
PATH=$newpath
export PATH

umask $NEWSUMASK

cd $NEWSCTL
trap : 1 2 3 15			# kids can be killed, but not me
if lock -v LOCK $$ 10			# try frequently
then
	NEWSHELD="$NEWSHELD LOCK"
	PS1="newslocked${PS1-> }"
	export NEWSHELD PS1
	echo 'news system locked by you'
	PATH="$oldpath"
	${SHELL-/bin/sh}
	PATH="$newpath"
	unlock LOCK
	echo 'news system unlocked now'
	exit 0
else
	echo "$0: inadequate permissions, or some sort of lock failure" >&2
	exit 1
fi