# Bash 的 lsipc 命令

lsipc [OPTION]...

$ lsipc
RESOURCE DESCRIPTION                                              LIMIT USED  USE%
MSGMNI   Number of message queues                                 32000    0 0.00%
MSGMAX   Max size of message (bytes)                                 8K    -     -
MSGMNB   Default max size of queue (bytes)                          16K    -     -
SHMMNI   Shared memory segments                                    4096    0 0.00%
SHMALL   Shared memory pages                       18446744073692774399    0 0.00%
SHMMAX   Max size of shared memory segment (bytes)                  16E    -     -
SHMMIN   Min size of shared memory segment (bytes)                   1B    -     -
SEMMNI   Number of semaphore identifiers                          32000    0 0.00%
SEMMNS   Total number of semaphores                          1024000000    0 0.00%
SEMMSL   Max semaphores per semaphore set.                        32000    -     -
SEMOPM   Max number of operations per semop(2)                      500    -     -
SEMVMX   Semaphore max value                                      32767    -     -

LSIPC(1)                         User Commands                        LSIPC(1)

NAME
       lsipc - show information on IPC facilities currently employed in the
       system

SYNOPSIS
       lsipc [options]

DESCRIPTION
       lsipc shows information on the System V inter-process communication
       facilities for which the calling process has read access.

OPTIONS
       -i, --id id
           Show full details on just the one resource element identified by
           id. This option needs to be combined with one of the three resource
           options: -m, -q or -s. It is possible to override the default
           output format for this option with the --list, --raw, --json or
           --export option.

       -g, --global
           Show system-wide usage and limits of IPC resources. This option may
           be combined with one of the three resource options: -m, -q or -s.
           The default is to show information about all resources.

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

       -V, --version
           Print version and exit.

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

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

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

   Output formatting
       -c, --creator
           Show creator and owner.

       -e, --export
           Produce output in the form of key="value" pairs. All potentially
           unsafe value characters are hex-escaped (\x<code>). See also option
           --shell.

       -J, --json
           Use the JSON output format.

       -l, --list
           Use the list output format. This is the default, except when --id
           is used.

       -n, --newline
           Display each piece of information on a separate line.

       --noheadings
           Do not print a header line.

       --notruncate
           Don’t truncate output.

       -o, --output list
           Specify which output columns to print. Use --help to get a list of
           all supported columns.

       -b, --bytes
           Print size in bytes rather than in human readable format.

       -r, --raw
           Raw output (no columnation).

       -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(2) and msgrcv(2) operations on message queues, the time
           of the last shmat(2) and shmdt(2) operations on shared memory, and
           the time of the last semop(2) operation on semaphores.

       --time-format type
           Display dates in short, full or iso format. The default is short,
           this time format is designed to be space efficient and human
           readable.

       -P, --numeric-perms
           Print numeric permissions in PERMS column.

       -y, --shell
           The column name will be modified to contain only characters allowed
           for shell variable identifiers. This is usable, for example, with
           --export. Note that this feature has been automatically enabled for
           --export in version 2.37, but due to compatibility issues, now it’s
           necessary to request this behavior by --shell.

EXIT STATUS
       0
           if OK,

       1
           if incorrect arguments specified,

       2
           if a serious error occurs.

HISTORY
       The lsipc utility is inspired by the ipcs(1) utility.

AUTHORS
       Ondrej Oprala <[email protected]>, Karel Zak <[email protected]>

SEE ALSO
       ipcmk(1), ipcrm(1), msgrcv(2), msgsnd(2), semget(2), semop(2),
       shmat(2), shmdt(2), shmget(2), sysvipc(7)

REPORTING BUGS
       For bug reports, use the issue tracker at
       https://github.com/util-linux/util-linux/issues.

AVAILABILITY
       The lsipc 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/>.

util-linux 2.39.3                 2023-10-23                          LSIPC(1)