ipcmk

Create a shared memory segment

$ ipcmk --shmem [segment_size_in_bytes]

Create a semaphore

$ ipcmk --semaphore [element_size]

Create a message queue

$ ipcmk --queue

Create a shared memory segment with specific permissions (default is 0644)

$ ipcmk --shmem [segment_size_in_bytes] [octal_permissons]

ipcmk [options]

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

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.

-Q, --queue

Create a message queue.

-S, --semaphore number

Create a semaphore array with number of elements.

Other options are:

-p, --mode mode

Access permissions for the resource. Default is 0644.

-V, --version

Display version information and exit.

-h, --help

Display help text and exit.

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

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/>.

ipcrm(1), ipcs(1), sysvipc(7)