seccomp.2: Document SECCOMP_FILTER_FLAG_NEW_LISTENER

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

diff --git a/man2/seccomp.2 b/man2/seccomp.2
index a064e13566dc5425f1d068166a58a48eb65ee731..5011b3a91c039399aa79532857e562b87dc72343 100644 (file)
--- a/man2/seccomp.2
+++ b/man2/seccomp.2
@@ -214,6 +214,13 @@ actions from being logged via the
 .IR /proc/sys/kernel/seccomp/actions_logged
 file.
 .TP
+.BR SECCOMP_FILTER_FLAG_NEW_LISTENER " (since Linux 4.21)"
+With this flag, a new userspace notification fd is returned on success. When
+this filter returns
+.BR SECCOMP_RET_USER_NOTIF
+a notification will be sent to this fd. See "Userspace Notification" below for
+more details.
+.TP
 .BR SECCOMP_FILTER_FLAG_SPEC_ALLOW " (since Linux 4.17)"
 .\" commit 00a02d0c502a06d15e07b857f8ff921e3e402675
 Disable Speculative Store Bypass mitigation.