1IPCS(1)                          User Commands                         IPCS(1)
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NAME

6       ipcs - show information on IPC facilities
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SYNOPSIS

9       ipcs [options]
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DESCRIPTION

12       ipcs  shows  information  on the inter-process communication facilities
13       for which the calling process has read access.   By  default  it  shows
14       information  about all three resources: shared memory segments, message
15       queues, and semaphore arrays.
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OPTIONS

18       -i, --id id
19              Show full details on just the one resource element identified by
20              id.   This  option  needs  to  be combined with one of the three
21              resource options: -m, -q or -s.
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23       -h, --help
24              Display help text and exit.
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26       -V, --version
27              Display version information and exit.
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29   Resource options
30       -m, --shmems
31              Write information about active shared memory segments.
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33       -q, --queues
34              Write information about active message queues.
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36       -s, --semaphores
37              Write information about active semaphore sets.
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39       -a, --all
40              Write information about all three resources (default).
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42   Output formats
43       Of these options only one takes effect: the last one specified.
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45       -c, --creator
46              Show creator and owner.
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48       -l, --limits
49              Show resource limits.
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51       -p, --pid
52              Show PIDs of creator and last operator.
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54       -t, --time
55              Write time information.  The time of the last control  operation
56              that changed the access permissions for all facilities, the time
57              of the  last  msgsnd(2)  and  msgrcv(2)  operations  on  message
58              queues, the time of the last shmat(2) and shmdt(2) operations on
59              shared memory, and the time of the last  semop(2)  operation  on
60              semaphores.
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62       -u, --summary
63              Show status summary.
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65   Representation
66       These affect only the -l (--limits) option.
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68       -b, --bytes
69              Print sizes in bytes.
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71       --human
72              Print sizes in human-readable format.
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SEE ALSO

75       ipcmk(1),   ipcrm(1),   msgrcv(2),   msgsnd(2),   semget(2),  semop(2),
76       shmat(2), shmdt(2), shmget(2)
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CONFORMING TO

79       The Linux ipcs utility is not fully compatible to the POSIX ipcs  util‐
80       ity.   The  Linux  version  does  not  support  the POSIX -a, -b and -o
81       options, but does support the -l and -u options not defined  by  POSIX.
82       A  portable  application  shall  not  use  the  -a,  -b, -o, -l, and -u
83       options.
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AUTHOR

86       Krishna Balasubramanian ⟨balasub@cis.ohio-state.edu⟩
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AVAILABILITY

89       The ipcs command is part of the util-linux  package  and  is  available
90       from Linux Kernel Archive ⟨https://www.kernel.org/pub/linux/utils/util-
91       linux/⟩.
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95util-linux                         July 2014                           IPCS(1)
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