tevent: Set FD_CLOEXEC on epoll handle

If an application using libtevent starts a new process the epoll file descriptor
is leaked to the new process if the event context is not freed explicitly. By
setting FD_CLOEXEC this is not needed anymore.

Signed-off-by: Simo Sorce <idra@samba.org>

1 files changed, 17 insertions, 0 deletions

diff --git a/lib/tevent/tevent_util.c b/lib/tevent/tevent_util.c
index f78cd8f707..16af8f3b90 100644
--- a/lib/tevent/tevent_util.c
+++ b/lib/tevent/tevent_util.c
@@ -88,3 +88,20 @@ int ev_set_blocking(int fd, bool set)
 	return fcntl( fd, F_SETFL, val);
 #undef FLAG_TO_SET
 }
+
+bool ev_set_close_on_exec(int fd)
+{
+#ifdef FD_CLOEXEC
+	int val;
+
+	val = fcntl(fd, F_GETFD, 0);
+	if (val >= 0) {
+		val |= FD_CLOEXEC;
+		val = fcntl(fd, F_SETFD, val);
+		if (val != -1) {
+			return true;
+		}
+	}
+#endif
+	return false;
+}