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diff --git a/tests/sys/kern/unix_seqpacket_test.c b/tests/sys/kern/unix_seqpacket_test.c
--- a/tests/sys/kern/unix_seqpacket_test.c
+++ b/tests/sys/kern/unix_seqpacket_test.c
@@ -532,6 +532,53 @@
close(a);
}
+/*
+ * Test that close(2) of the peer ends in EPIPE when we try to send(2).
+ * Test both normal case as well as a peer that was not accept(2)-ed.
+ */
+static bool sigpipe_received = false;
+static void
+sigpipe_handler(int signo __unused)
+{
+ sigpipe_received = true;
+}
+
+ATF_TC_WITHOUT_HEAD(send_to_closed);
+ATF_TC_BODY(send_to_closed, tc)
+{
+ struct sigaction sa = {
+ .sa_handler = sigpipe_handler,
+ };
+ const struct sockaddr_un *sun;
+ int l, s, a;
+
+ ATF_REQUIRE(sigemptyset(&sa.sa_mask) == 0);
+ ATF_REQUIRE(sigaction(SIGPIPE, &sa, NULL) == 0);
+
+ sun = mk_listening_socket(&l);
+
+ ATF_REQUIRE((s = socket(PF_LOCAL, SOCK_SEQPACKET, 0)) > 0);
+ ATF_REQUIRE(connect(s, (struct sockaddr *)sun, sizeof(*sun)) == 0);
+ ATF_REQUIRE((a = accept(l, NULL, NULL)) != 1);
+ close(a);
+ ATF_REQUIRE(send(s, &s, sizeof(s), 0) == -1);
+ ATF_REQUIRE(errno == EPIPE);
+ ATF_REQUIRE(sigpipe_received == true);
+ close(s);
+
+ ATF_REQUIRE((s = socket(PF_LOCAL, SOCK_SEQPACKET, 0)) > 0);
+ ATF_REQUIRE(connect(s, (struct sockaddr *)sun, sizeof(*sun)) == 0);
+ close(l);
+ sigpipe_received = false;
+ ATF_REQUIRE(send(s, &s, sizeof(s), 0) == -1);
+ ATF_REQUIRE(errno == EPIPE);
+ ATF_REQUIRE(sigpipe_received == true);
+ close(s);
+
+ sa.sa_handler = SIG_DFL;
+ ATF_REQUIRE(sigaction(SIGPIPE, &sa, NULL) == 0);
+}
+
/* Implied connect is unix/dgram only feature. Fails on stream or seqpacket. */
ATF_TC_WITHOUT_HEAD(implied_connect);
ATF_TC_BODY(implied_connect, tc)
@@ -1266,6 +1313,7 @@
ATF_TP_ADD_TC(tp, send_recv_with_connect);
ATF_TP_ADD_TC(tp, sendto_recvfrom);
ATF_TP_ADD_TC(tp, send_before_accept);
+ ATF_TP_ADD_TC(tp, send_to_closed);
ATF_TP_ADD_TC(tp, implied_connect);
ATF_TP_ADD_TC(tp, shutdown_send);
ATF_TP_ADD_TC(tp, shutdown_send_sigpipe);

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