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NAME | DESCRIPTION | SEE ALSO | COLOPHON |
IPC_NAMESPACES(7) Linux Programmer's Manual IPC_NAMESPACES(7)
ipc_namespaces - overview of Linux IPC namespaces
IPC namespaces isolate certain IPC resources, namely, System V IPC
objects (see sysvipc(7)) and (since Linux 2.6.30) POSIX message
queues (see mq_overview(7)). The common characteristic of these IPC
mechanisms is that IPC objects are identified by mechanisms other
than filesystem pathnames.
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.
The following /proc interfaces are distinct in each IPC namespace:
* The POSIX message queue interfaces in /proc/sys/fs/mqueue.
* The System V IPC interfaces in /proc/sys/kernel, namely: msgmax,
msgmnb, msgmni, sem, shmall, shmmax, shmmni, and shm_rmid_forced.
* The System V IPC interfaces in /proc/sysvipc.
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.
Use of IPC namespaces requires a kernel that is configured with the
CONFIG_IPC_NS option.
nsenter(1), unshare(1), clone(2), setns(2), unshare(2),
mq_overview(7), namespaces(7), sysvipc(7)
This page is part of release 5.08 of the Linux man-pages project. A
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latest version of this page, can be found at
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Linux 2019-08-02 IPC_NAMESPACES(7)
Pages that refer to this page: nsenter(1) , unshare(1) , clone2(2) , __clone2(2) , clone(2) , clone3(2) , mq_overview(7) , namespaces(7) , svipc(7) , sysvipc(7)
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