1 files changed, 73 insertions, 0 deletions
diff --git a/testcases/kernel/syscalls/epoll_wait/epoll_wait07.c b/testcases/kernel/syscalls/epoll_wait/epoll_wait07.c
new file mode 100644
index 000000000..dfabd0d87
--- /dev/null
+++ b/testcases/kernel/syscalls/epoll_wait/epoll_wait07.c
@@ -0,0 +1,73 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2023 SUSE LLC Andrea Cervesato <andrea.cervesato@suse.com>
+ */
+
+/*\
+ * [Description]
+ *
+ * Verify that EPOLLONESHOT is correctly handled by epoll_wait.
+ * We open a channel, write in it two times and verify that EPOLLIN has been
+ * received only once.
+ */
+
+#include <poll.h>
+#include <sys/epoll.h>
+#include "tst_test.h"
+#include "tst_epoll.h"
+
+static int fds[2];
+static int epfd;
+
+static void cleanup(void)
+{
+	if (epfd > 0)
+		SAFE_CLOSE(epfd);
+
+	if (fds[0] > 0)
+		SAFE_CLOSE(fds[0]);
+
+	if (fds[1] > 0)
+		SAFE_CLOSE(fds[1]);
+}
+
+static void run(void)
+{
+	struct epoll_event evt_receive;
+	char buff = 'a';
+
+	SAFE_PIPE(fds);
+
+	tst_res(TINFO, "Polling on channel with EPOLLONESHOT");
+
+	epfd = SAFE_EPOLL_CREATE1(0);
+
+	SAFE_EPOLL_CTL(epfd, EPOLL_CTL_ADD, fds[0], &((struct epoll_event) {
+		.events = EPOLLIN | EPOLLONESHOT,
+		.data.fd = fds[0],
+	}));
+
+	tst_res(TINFO, "Write channel for the 1st time. EPOLLIN expected");
+
+	SAFE_WRITE(0, fds[1], &buff, 1);
+	TST_EXP_EQ_LI(SAFE_EPOLL_WAIT(epfd, &evt_receive, 10, 0), 1);
+	TST_EXP_EQ_LI(evt_receive.events & EPOLLIN, EPOLLIN);
+	TST_EXP_EQ_LI(evt_receive.data.fd, fds[0]);
+
+	SAFE_READ(1, fds[0], &buff, 1);
+	TST_EXP_EQ_LI(SAFE_EPOLL_WAIT(epfd, &evt_receive, 10, 0), 0);
+
+	tst_res(TINFO, "Write channel for the 2nd time. No events expected");
+
+	SAFE_WRITE(0, fds[1], &buff, 1);
+	TST_EXP_EQ_LI(SAFE_EPOLL_WAIT(epfd, &evt_receive, 10, 0), 0);
+
+	SAFE_CLOSE(epfd);
+	SAFE_CLOSE(fds[0]);
+	SAFE_CLOSE(fds[1]);
+}
+
+static struct tst_test test = {
+	.cleanup = cleanup,
+	.test_all = run,
+};