README

NAME
	cmdipc - System V and POSIX IPC from the command line

SYNOPSIS
	cmdipc -Q [OPTION]... [receive]
	cmdipc -Q [OPTION]... send [--] MESSAGE
	cmdipc -S [OPTION]... [p|v|z|read]
	cmdipc -S [OPTION]... set VALUE
	cmdipc -M [OPTION]... [read]
	cmdipc -M [OPTION]... write [--] DATA
	cmdipc -X [OPTION]... [enter|leave]
	cmdipc -C [OPTION]... [enter|leave|wait]
	cmdipc -C [OPTION]... notify [all]
	cmdipc -C [OPTION]... broadcast
	cmdipc -B [OPTION]... THRESHOLD [enter]
	cmdipc -B [OPTION]... --remove
	cmdipc -L [OPTION]... [shared [un]lock]
	cmdipc -L [OPTION]... exclusive [un]lock
	cmdipc -R [OPTION]... [--] [MESSAGE]
	cmdipc --ftok PATH ID

DESCRIPTION
	System V and POSIX interprocess communication from the command
	line. In addition to the primities shared memory, message queue
	and semaphores, this tool can from these primitives construct
	mutexes, conditions, barriers, shared locks and rendezvous.

OPTIONS
	-h, --help              Prints this help message and exits
	-k, --key KEY           The key (SysV) or name (POSIX) of the item
	-m, --mode OCTAL        The mode for the item
	-s, --size SIZE         Maximum size for messages
	-z, --spool SIZE        Maximum number of messages
	-t, --type TYPE         Message type
	-p, --priority PRIO     Message priority
	-d, --delta DELTA       Semaphore value increment
	-i, --initial VALUE     Initial semaphore value
	-b, --timeout SECS      Semaphore V/Z timeout, in seconds
	-l, --length LEN        Shared memory read length
	-o, --offset OFF        Shared memory read/write offset
	-r, --remove            Remove unit
	-n, --nonblocking       Do not block, exit with 2 if busy
	-c, --create            Create item
	-x, --exclusive         Create exclusive item
	-f, --ftok              Create unit ID, possibly non-unique
	-P, --posix             Use POSIX IPC rather than System V IPC
	-Q, --mqueue            Use message queue
	-S, --semaphore         Use semaphore
	-M, --shm               Use shared memory
	-X, --mutex             Use mutex
	-C, --condition         Use condition
	-B, --barrier           Use barrier
	-L, --shared-lock       Use shared lock
	-R, --rendezvous        Use rendezvous

RATIONALE
	Interprocess communication in the command line enables much
	more interesting use of shell scripts.

SEE ALSO
	bus(1), ipcs(1), ipcrm(1), ipcmk(1), flock(1), mkfifo(1), ipcmd

	Full documentation available locally via: info '(cmdipc)'