--- /dev/null
+# $FreeBSD$
+# Test that an interactive shell accesses $MAIL.
+
+goodfile=/var/empty/sh-test-goodfile
+mailfile=/var/empty/sh-test-mailfile
+T=$(mktemp sh-test.XXXXXX) || exit
+ENV=$goodfile MAIL=$mailfile ktrace -i -f "$T" ${SH} +m -i </dev/null >/dev/null 2>&1
+if ! grep -q $goodfile "$T"; then
+ # ktrace problem
+ rc=0
+elif grep -q $mailfile "$T"; then
+ rc=0
+fi
+rm "$T"
+exit ${rc:-3}