#! /bin/sh
# Incoming-news spooling.
# Arguments are options etc., not filenames -- it looks tempting to
# put "$*" after newsspool, but there are security problems.

# =()<. ${NEWSCONFIG-@<NEWSCONFIG>@}>()=
. ${NEWSCONFIG-/usr/local/libexec/cnews/config}

PATH=$NEWSCTL/bin:$NEWSBIN/input:$NEWSBIN:$NEWSPATH ; export PATH
umask $NEWSUMASK

# sort out arguments; pretty simple for now
decompress=
for dummy
do
	case "$1" in
	-d)	decompress="$2"
		case "$decompress" in
		.*)	decompress=	;;
		*/*)	decompress=	;;
		esac
		shift
		;;
	--)	shift ; break	;;
	-*)	echo "$0: unknown option \`$1'" >&2 ; exit 2	;;
	*)	break	;;
	esac
	shift
done
if test " $decompress" != " "
then
	decompress="$NEWSBIN/decompressors/$decompress"
	if test ! -r "$decompress"
	then
		decompress=
	fi
fi

# check space, assuming a pretty large batch (no cheap way to find real size)
counter=1
while test " `spacefor 250000 incoming`" -le 0
do
	# Warn sysadmin -- he just might be listening and able to act -- and
	# stall a little bit in hopes that it's transient.
	if test " $counter" -eq 1
	then
		report -u 'news space shortage' <<'!'
Incoming news will be discarded due to space shortage unless more room
becomes available within 15 min.
!
	fi
	if test " $counter" -gt 1111		# four tries is plenty
	then
		# oh no! -- nothing we can do, really...
		cat >/dev/null
		echo incoming news discarded due to space shortage |
						report -u 'news discarded'
		exit 1
	fi
	if test ! -f $NEWSCTL/rnews.stall
	then
		counter="1$counter"
	else			# avoid repeating the sysadmin warning
		counter=2
	fi
	sleep 300
done

# spool it
case "$decompress" in
'')	newsspool		;;
*)	$decompress | newsspool	;;
esac >/tmp/ngripe.$$ 2>&1
if test ! -s /tmp/ngripe.$$
then
	# it worked
	rm -f /tmp/ngripe.$$
	exit 0
fi

# something went wrong
# there really isn't any way to save the data if newsspool fails,
# not without causing other problems
report -u 'newsspool or decompressor failure' </tmp/ngripe.$$
rm -f /tmp/ngripe.$$
exit 1