1 files changed, 49 insertions, 0 deletions
diff --git a/contrib/nvi/build/recover.in b/contrib/nvi/build/recover.in
new file mode 100644
index 0000000..cfaf75f
--- /dev/null
+++ b/contrib/nvi/build/recover.in
@@ -0,0 +1,49 @@
+#!/bin/sh -
+#
+#	@(#)recover.in	8.8 (Berkeley) 10/10/96
+#
+# Script to recover nvi edit sessions.
+
+RECDIR="@vi_cv_path_preserve@"
+SENDMAIL="@vi_cv_path_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