[PATCH 3/4] proc.5: Document the proc files for the user, mount, and pid namespaces.
DORMANTno replies
From: Eric W. Biederman <hidden>
Date: 2012-11-27 00:47:57
Subsystem:
the rest · Maintainer:
Linus Torvalds
Possibly related (same subject, not in this thread)
- 2012-12-27 · Re: [PATCH 3/4] proc.5: Document the proc files for the user, mount, and pid namespaces. · Michael Kerrisk (man-pages) <hidden>
Signed-off-by: "Eric W. Biederman" <ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org> --- 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).
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