NetBSD/usr.bin/vi/install/recover.script

#	@(#)recover.script	8.7 (Berkeley) 8/16/94
#
# Script to recover nvi edit sessions.
#
RECDIR=/var/tmp/vi.recover
SENDMAIL=/usr/sbin/sendmail
echo 'Recovering nvi editor sessions.'

# Check editor backup files.
vibackup=`echo $RECDIR/vi.*`
if [ "$vibackup" != "$RECDIR/vi.*" ]; then
	for i in $vibackup; do
		# Only test files that are readable.
		if test ! -r $i; then
			continue
		fi

		# Unmodified nvi editor backup files either have the
		# execute bit set or are zero length.  Delete them.
		if test -x $i -o ! -s $i; then
			rm $i
		fi
	done
fi

# It is possible to get incomplete recovery files, if the editor crashes
# at the right time.
virecovery=`echo $RECDIR/recover.*`
if [ "$virecovery" != "$RECDIR/recover.*" ]; then
	for i in $virecovery; do
		# Only test files that are readable.
		if test ! -r $i; then
			continue
		fi

		# Delete any recovery files that are zero length, corrupted,
		# or that have no corresponding backup file.  Else send mail
		# to the user.
		recfile=`awk '/^X-vi-recover-path:/{print $2}' < $i`
		if test -n "$recfile" -a -s "$recfile"; then
			$SENDMAIL -t < $i
		else
			rm $i
		fi
	done
fi