IPCMK(1)                         User Commands                        IPCMK(1)

NAME
       ipcmk - make various IPC resources

SYNOPSIS
       ipcmk [options]

DESCRIPTION
       ipcmk allows you to create POSIX and System V inter-process
       communication (IPC) objects: shared memory segments, message queues,
       and semaphore (arrays for System V).

OPTIONS
       Resources can be specified with these options:

       -M, --shmem size
           Create a shared memory segment of size bytes. The size argument may
           be followed by the multiplicative suffixes KiB (=1024), MiB
           (=1024*1024), and so on for GiB, etc. (the "iB" is optional, e.g.,
           "K" has the same meaning as "KiB") or the suffixes KB (=1000), MB
           (=1000*1000), and so on for GB, etc.

       -m, --posix-shmem size
           Create a POSIX shared memory segment of size bytes. The size
           argument may be followed by the multiplicative suffixes KiB
           (=1024), MiB (=1024*1024), and so on for GiB, etc. (the "iB" is
           optional, e.g., "K" has the same meaning as "KiB") or the suffixes
           KB (=1000), MB (=1000*1000), and so on for GB, etc.

       -Q, --queue
           Create a message queue.

       -q, --posix-mqueue
           Create a POSIX message queue.

       -S, --semaphore number
           Create a semaphore array with number of elements.

       -s, --posix-semaphore
           Create a POSIX named semaphore.

       -n, --name name
           Name of the POSIX IPC object. This option is mandatory for POSIX
           IPC objects.

       Other options are:

       -p, --mode mode
           Access permissions for the resource. Default is 0644.

       -h, --help
           Display help text and exit.

       -V, --version
           Display version and exit.

AUTHORS
       Hayden A. James <hayden.james@gmail.com>, Prasanna Paithankar
       <paithankarprasanna@gmail.com>

SEE ALSO
       ipcrm(1), ipcs(1), lsipc(1), sysvipc(7)

REPORTING BUGS
       For bug reports, use the issue tracker
       <https://github.com/util-linux/util-linux/issues>.

AVAILABILITY
       The ipcmk command is part of the util-linux package which can be
       downloaded from Linux Kernel Archive
       <https://www.kernel.org/pub/linux/utils/util-linux/>.

util-linux 2.41                   2025-03-29                          IPCMK(1)