1 files changed, 45 insertions, 0 deletions
diff --git a/epoll_ctl.c b/epoll_ctl.c
new file mode 100644
index 0000000..728a2af
--- /dev/null
+++ b/epoll_ctl.c
@@ -0,0 +1,45 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* epoll_ctl.c - epoll manipulation helpers
+ *
+ * Copyright Red Hat
+ * Author: Laurent Vivier <lvivier@redhat.com>
+ */
+
+#include <errno.h>
+
+#include "epoll_ctl.h"
+
+/**
+ * epoll_add() - Add a file descriptor to an epollfd
+ * @epollfd:	epoll file descriptor to add to
+ * @events:	epoll events
+ * @ref:	epoll reference for the file descriptor (includes fd and metadata)
+ *
+ * Return: 0 on success, negative errno on failure
+ */
+int epoll_add(int epollfd, uint32_t events, union epoll_ref ref)
+{
+	struct epoll_event ev;
+	int ret;
+
+	ev.events = events;
+	ev.data.u64 = ref.u64;
+
+	ret = epoll_ctl(epollfd, EPOLL_CTL_ADD, ref.fd, &ev);
+	if (ret == -1) {
+		ret = -errno;
+		err("Failed to add fd to epoll: %s", strerror_(-ret));
+	}
+
+	return ret;
+}
+
+/**
+ * epoll_del() - Remove a file descriptor from an epollfd
+ * @epollfd:	epoll file descriptor to remove from
+ * @fd:		File descriptor to remove
+ */
+void epoll_del(int epollfd, int fd)
+{
+	epoll_ctl(epollfd, EPOLL_CTL_DEL, fd, NULL);
+}