IPCS(1)                                   User Commands                                   IPCS(1)



NAME
       ipcs - provide information on IPC facilities

SYNOPSIS
       ipcs [resource-option] [output-format]
       ipcs [resource-option] -i id

DESCRIPTION
       ipcs  provides  information  on  the  inter-process communication facilities for which the
       calling process has read access.

OPTIONS
       -i, --id id
              Print details only on the resource identified by id.

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

       -V, --version
              Display version information and exit.

   Resource options
       -q, --queues
              Write information about active message queues.

       -m, --shmems
              Write information about active shared memory segments.

       -s, --semaphores
              Write information about active semaphore sets.

       -a, --all
              Write information about all three resources (default).

   Output formats
       Of these options only one takes effect: the last one specified.

       -c, --creator
              Show creator and owner.

       -l, --limits
              Show resource limits.

       -p, --pid
              Show PIDs of creator and last operator.

       -t, --time
              Write time information.  The time of the last control operation  that  changed  the
              access  permissions  for all facilities, the time of the last msgsnd() and msgrcv()
              operations on message queues, the time of the last shmat() and  shmdt()  operations
              on shared memory, and the time of the last semop() operation on semaphores.

       -u, --summary
              Show status summary.

   Representation
       These affect only the -l (--limits) option.

       -b, --bytes
              Print sizes in bytes.

       --human
              Print sizes in human-readable format.

SEE ALSO
       ipcrm(1),   ipcmk(1),  msgrcv(2),  msgsnd(2),  semget(2),  semop(2),  shmat(2),  shmdt(2),
       shmget(2)

CONFORMING TO
       The Linux ipcs utility is not fully compatible to the POSIX ipcs utility.  The Linux  ver-
       sion  does  not  support  the  POSIX -a, -b and -o options, but does support the -l and -u
       options not defined by POSIX.  A portable application shall not use the -a,  -b,  -o,  -l,
       and -u options.

AUTHOR
       Krishna Balasubramanian <balasub@cis.ohio-state.edu>

AVAILABILITY
       The  ipcs  command  is  part  of the util-linux package and is available from Linux Kernel
       Archive <ftp://ftp.kernel.org/pub/linux/utils/util-linux/>.



util-linux                                 January 2013                                   IPCS(1)