Signed-off-by: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx> --- man5/proc.5 | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 52 insertions(+), 0 deletions(-) diff --git a/man5/proc.5 b/man5/proc.5 index 840480d..eb612b9 100644 --- a/man5/proc.5 +++ b/man5/proc.5 @@ -581,6 +581,58 @@ even if all processes in the namespace terminate. The file descriptor can be passed to .BR setns (2). .TP +.IR /proc/[pid]/ns/user " (since Linux 3.8)" +Bind mounting this file (see +.BR mount (2)) +to somewhere else in the filesystem keeps +the user namespace of the process specified by +.I pid +alive even if all processes currently in the namespace terminate. + +Opening this file returns a file handle for the user namespace +of the process specified by +.IR pid . +As long as this file descriptor remains open, +the user namespace will remain alive, +even if all processes in the namespace terminate. +The file descriptor can be passed to +.BR setns (2). +.TP +.IR /proc/[pid]/ns/pid " (since Linux 3.8)" +Bind mounting this file (see +.BR mount (2)) +to somewhere else in the filesystem keeps +the PID namespace of the process specified by +.I pid +alive even if all processes currently in the namespace terminate. + +Opening this file returns a file handle for the PID namespace +of the process specified by +.IR pid . +As long as this file descriptor remains open, +the PID namespace will remain alive, +even if all processes in the namespace terminate. +The file descriptor can be passed to +.BR setns (2). +.TP +.IR /proc/[pid]/ns/mnt " (since Linux 3.8)" +Bind mounting this file (see +.BR mount (2)) +to somewhere else in the filesystem keeps +the mount namespace of the process specified by +.I pid +alive even if all processes currently in the namespace terminate. + +Opening this file returns a file handle for the mount namespace +of the process specified by +.IR pid . +As long as this file descriptor remains open, +the mount namespace will remain alive, +even if all processes in the namespace terminate. +The file descriptor can be passed to +.BR setns (2). + +.TP .IR /proc/[pid]/numa_maps " (since Linux 2.6.14)" See .BR numa (7). -- 1.7.5.4 _______________________________________________ Containers mailing list Containers@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/containers
