#! /bin/sh
# addmissing - add missing articles to history
# Has a SORTTMP hook for feeding in a "-T dir" option if sort's default
# temporary directory is short of space.
# =()<. ${NEWSCONFIG-@<NEWSCONFIG>@}>()=
. ${NEWSCONFIG-/usr/local/libexec/cnews/config}

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

dbzrebuild=n
verbose=n
for o
do
	case "$o" in
	-d)	dbzrebuild=y	;;
	-v)	verbose=y	;;
	*)	echo "Usage: $0 [-d] [-v]" >&2
		exit 2
		;;
	esac
done

# get main lock for history examination, and lock out expire too
lock LOCK $$ || exit 1
status=1
trap "unlock LOCK ; trap 0 ; exit \$status" 0 1 2 15
if lock -o LOCKexpire $$
then
	trap "unlock LOCK LOCKexpire ; trap 0 ; exit \$status" 0 1 2 15
else
	echo "$0: expire is running, $0 aborted" >&2
	exit
fi

# note the time
>/tmp/time$$

# put together a list of known filenames from history
egrep '	.*	' $NEWSCTL/history | sed 's/.*	//' | tr '. ' '/
' | egrep '/' | sort -u $SORTTMP >/tmp/hist$$

# release the main lock, temporarily
trap "unlock LOCKexpire ; trap 0 ; exit \$status" 0 1 2 15
unlock LOCK

# sweep the tree, ignoring things that arrive while we're working
cd $NEWSARTS
them=
for f in `ls | egrep -v '\.|(^lost\+found$)'`
do
	if test -d $f/.
	then
		them="$them $f"
	fi
done
find $them -type f -name '[0-9]*' ! -newer /tmp/time$$ -print |
	sort $SORTTMP >/tmp/tree$$

# find missing files, and build history entries for them
comm -13 /tmp/hist$$ /tmp/tree$$ | histinfo | sort $SORTTMP |
	awk -f $NEWSBIN/maint/histdups |
	sort $SORTTMP -t'	' +1n >/tmp/new$$

# check for oddities
if egrep '^<[^>]*@trash>	' /tmp/new$$ >/dev/null
then
	echo "$0: (warning) empty/trash articles found, will expire at once" >&2
	echo "$0:     (grep history file for '@trash' to see them)" >&2
fi

# lock things up again and plug them in
cd $NEWSCTL
lock LOCK $$ || exit
trap "unlock LOCK LOCKexpire ; trap 0 ; exit \$status" 0 1 2 15
if test " $dbzrebuild" = " y"
then
	cat /tmp/new$$ >>history
	dbz history
else
	dbz -a history /tmp/new$$
fi

case "$verbose" in
y)	n="`wc -l </tmp/new$$ | tr -d ' '`"
	echo "$0: found $n articles missing from history:"
	if test " $n" -lt 50
	then
		cat /tmp/new$$
	else
		sed 3q /tmp/new$$
		echo
		echo "..."
		echo
		tail -3 /tmp/new$$
	fi
	;;
esac

rm -f /tmp/hist$$ /tmp/tree$$ /tmp/new$$ /tmp/time$$
status=0