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Diffstat (limited to 'README')
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@@ -1,5 +1,64 @@ -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 mutexe, -conditions, barriers, shared locks and rendezvous. +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)' + |