From eca31e69703c18439d4ee782cf26c16b259b2d80 Mon Sep 17 00:00:00 2001 From: Michael Kerrisk Date: Mon, 15 Jun 2020 15:04:16 +0200 Subject: [PATCH] pidfd_open.2: Add the setns(2) use case for PID file descriptors Signed-off-by: Michael Kerrisk --- man2/pidfd_open.2 | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/man2/pidfd_open.2 b/man2/pidfd_open.2 index 6188a2294..2007fa144 100644 --- a/man2/pidfd_open.2 +++ b/man2/pidfd_open.2 @@ -178,6 +178,11 @@ The .BR pidfd_getfd (2) system call can be used to obtain a duplicate of a file descriptor of another process referred to by a PID file descriptor. +.IP \(bu +A PID file descriptor can be used as the argument of +.BR setns (2) +in order to move into one or more of the same namespaces as the process +referred to by the file descriptor. .PP The .BR pidfd_open () @@ -262,5 +267,6 @@ main(int argc, char *argv[]) .BR pidfd_send_signal (2), .BR poll (2), .BR select (2), +.BR setns (2), .BR waitid (2), .BR epoll (7)