NAME¶
lsipc - show information on IPC facilities currently employed in
the system
SYNOPSIS¶
lsipc [options]
DESCRIPTION¶
lsipc shows information on the POSIX and System V
inter-process communication facilities for which the calling process has
read access.
The default output, as well as the default output from options
with predefined output columns (like --shmems, etc.), is subject to
change. So whenever possible, you should avoid using default outputs in your
scripts. Always explicitly define expected columns by using --output
columns-list in environments where a stable output is required.
OPTIONS¶
-i, --id id
Show full details on just the one resource element
(System V) 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.
-N, --name name
Show full details on just the one resource element
(POSIX) identified by name. 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
Display version and exit.
Resource options¶
-m, --shmems
Write information about active System V shared memory
segments.
-M, --posix-shmems
Write information about active POSIX shared memory
segments.
-q, --queues
Write information about active System V message
queues.
-Q, --posix-mqueues
Write information about active POSIX message
queues.
-s, --semaphores
Write information about active System V semaphore
sets.
-S, --posix-semaphores
Write information about active POSIX named
semaphores.
-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 <ooprala@redhat.com>, Karel Zak
<kzak@redhat.com>
