diff options
| author | Alejandro Colomar <alx@kernel.org> | 2024-04-26 15:06:49 +0200 |
|---|---|---|
| committer | Alejandro Colomar <alx@kernel.org> | 2024-05-02 01:24:19 +0200 |
| commit | dcde2f70372b49ec43efc5db864c9ff585d0a2dd (patch) | |
| tree | 78b9b7425130e4a5858e4c01a524d802423879ed /man/man7/ipc_namespaces.7 | |
| parent | 12aca537ce78a41bbcdaf485209691e10f8002d7 (diff) | |
| download | man-pages-dcde2f70372b49ec43efc5db864c9ff585d0a2dd.tar.gz | |
man/, share/mk/: Move man*/ to man/
This is a scripted change:
$ mkdir man/;
$ mv man* man/;
$ ln -st . man/man*;
$ find share/mk/ -type f \
| xargs grep -l '^MANDIR *:=' \
| xargs sed -i '/^MANDIR *:=/s,$,/man,';
$ find share/mk/dist/ -type f \
| xargs grep -l man \
| xargs sed -i 's,man%,man/%,g';
Link: <https://lore.kernel.org/linux-man/YxcV4h+Xn7cd6+q2@pevik/T/>
Cc: Petr Vorel <pvorel@suse.cz>
Cc: Jakub Wilk <jwilk@jwilk.net>
Cc: Stefan Puiu <stefan.puiu@gmail.com>
Signed-off-by: Alejandro Colomar <alx@kernel.org>
Diffstat (limited to 'man/man7/ipc_namespaces.7')
| -rw-r--r-- | man/man7/ipc_namespaces.7 | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/man/man7/ipc_namespaces.7 b/man/man7/ipc_namespaces.7 new file mode 100644 index 0000000000..77d8c5ebbf --- /dev/null +++ b/man/man7/ipc_namespaces.7 @@ -0,0 +1,66 @@ +.\" Copyright (c) 2019 by Michael Kerrisk <mtk.manpages@gmail.com> +.\" +.\" SPDX-License-Identifier: Linux-man-pages-copyleft +.\" +.\" +.TH ipc_namespaces 7 (date) "Linux man-pages (unreleased)" +.SH NAME +ipc_namespaces \- overview of Linux IPC namespaces +.SH DESCRIPTION +IPC namespaces isolate certain IPC resources, +namely, System V IPC objects (see +.BR sysvipc (7)) +and (since Linux 2.6.30) +.\" commit 7eafd7c74c3f2e67c27621b987b28397110d643f +.\" https://lwn.net/Articles/312232/ +POSIX message queues (see +.BR mq_overview (7)). +The common characteristic of these IPC mechanisms is that IPC +objects are identified by mechanisms other than filesystem +pathnames. +.P +Each IPC namespace has its own set of System V IPC identifiers and +its own POSIX message queue filesystem. +Objects created in an IPC namespace are visible to all other processes +that are members of that namespace, +but are not visible to processes in other IPC namespaces. +.P +The following +.I /proc +interfaces are distinct in each IPC namespace: +.IP \[bu] 3 +The POSIX message queue interfaces in +.IR /proc/sys/fs/mqueue . +.IP \[bu] +The System V IPC interfaces in +.IR /proc/sys/kernel , +namely: +.IR msgmax , +.IR msgmnb , +.IR msgmni , +.IR sem , +.IR shmall , +.IR shmmax , +.IR shmmni , +and +.IR shm_rmid_forced . +.IP \[bu] +The System V IPC interfaces in +.IR /proc/sysvipc . +.P +When an IPC namespace is destroyed +(i.e., when the last process that is a member of the namespace terminates), +all IPC objects in the namespace are automatically destroyed. +.P +Use of IPC namespaces requires a kernel that is configured with the +.B CONFIG_IPC_NS +option. +.SH SEE ALSO +.BR nsenter (1), +.BR unshare (1), +.BR clone (2), +.BR setns (2), +.BR unshare (2), +.BR mq_overview (7), +.BR namespaces (7), +.BR sysvipc (7) |