Index: head/usr.bin/cmp/special.c
===================================================================
--- head/usr.bin/cmp/special.c
+++ head/usr.bin/cmp/special.c
@@ -99,6 +99,8 @@
 	} else
 		if (feof(fp2))
 			eofmsg(file2);
+	fclose(fp2);
+	fclose(fp1);
 	if (dfound)
 		exit(DIFF_EXIT);
 }
Index: head/usr.bin/cmp/tests/Makefile
===================================================================
--- head/usr.bin/cmp/tests/Makefile
+++ head/usr.bin/cmp/tests/Makefile
@@ -2,6 +2,7 @@
 
 .include <bsd.own.mk>
 
+ATF_TESTS_SH+=		cmp_test2
 NETBSD_ATF_TESTS_SH=	cmp_test
 
 .include <netbsd-tests.test.mk>
Index: head/usr.bin/cmp/tests/cmp_test2.sh
===================================================================
--- head/usr.bin/cmp/tests/cmp_test2.sh
+++ head/usr.bin/cmp/tests/cmp_test2.sh
@@ -0,0 +1,67 @@
+# Copyright (c) 2017 Alan Somers
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+# ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+# PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+#
+# $FreeBSD$
+
+atf_test_case special
+special_head() {
+	atf_set "descr" "Test cmp(1)'s handling of non-regular files"
+}
+special_body() {
+	echo 0123456789abcdef > a
+	echo 0123456789abcdeg > b
+	cat a | atf_check -s exit:0 cmp a -
+	cat a | atf_check -s exit:0 cmp - a
+	cat b | atf_check -s not-exit:0 cmp a -
+	cat b | atf_check -s not-exit:0 cmp - a
+	true
+}
+
+atf_test_case symlink
+symlink_head() {
+	atf_set "descr" "Test cmp(1)'s handling of symlinks"
+}
+symlink_body() {
+	echo 0123456789abcdef > a
+	echo 0123456789abcdeg > b
+	ln -s a a.lnk
+	ln -s b b.lnk
+	ln -s a a2.lnk
+	cp a adup
+	ln -s adup adup.lnk
+	atf_check -s exit:0 cmp a a.lnk
+	atf_check -s exit:0 cmp a.lnk a
+	atf_check -s not-exit:0 -o ignore cmp a b.lnk
+	atf_check -s not-exit:0 -o ignore cmp b.lnk a
+	atf_check -s not-exit:0 -o ignore -e ignore cmp -h a a.lnk
+	atf_check -s not-exit:0 -o ignore -e ignore cmp -h a.lnk a
+	atf_check -s exit:0 cmp -h a.lnk a2.lnk
+	atf_check -s not-exit:0 -o ignore -e ignore cmp -h a.lnk adup.lnk
+}
+
+atf_init_test_cases()
+{
+	atf_add_test_case special
+	atf_add_test_case symlink
+}