IPC::SysV - System V IPC constants and system calls
use IPC::SysV qw(IPC_STAT IPC_PRIVATE);
Perl Programmers Reference Guide IPC::SysV(3)
NAME
IPC::SysV - System V IPC constants and system calls
SYNOPSIS
use IPC::SysV qw(IPC_STAT IPC_PRIVATE);
DESCRIPTION
"IPC::SysV" defines and conditionally exports all the constants defined
in your system include files which are needed by the SysV IPC calls.
Common ones include
IPC_CREAT IPC_EXCL IPC_NOWAIT IPC_PRIVATE IPC_RMID IPC_SET IPC_STAT
GETVAL SETVAL GETPID GETNCNT GETZCNT GETALL SETALL
SEM_A SEM_R SEM_UNDO
SHM_RDONLY SHM_RND SHMLBA
and auxiliary ones
S_IRUSR S_IWUSR S_IRWXU
S_IRGRP S_IWGRP S_IRWXG
S_IROTH S_IWOTH S_IRWXO
but your system might have more.
ftok( PATH )
ftok( PATH, ID )
Return a key based on PATH and ID, which can be used as a key for
"msgget", "semget" and "shmget". See ftok(3).
If ID is omitted, it defaults to 1. If a single character is given
for ID, the numeric value of that character is used.
shmat( ID, ADDR, FLAG )
Attach the shared memory segment identified by ID to the address
space of the calling process. See shmat(2).
ADDR should be "undef" unless you really know what you're doing.
shmdt( ADDR )
Detach the shared memory segment located at the address specified
by ADDR from the address space of the calling process. See
shmdt(2).
memread( ADDR, VAR, POS, SIZE )
Reads SIZE bytes from a memory segment at ADDR starting at position
POS. VAR must be a variable that will hold the data read. Returns
true if successful, or false if there is an error. memread() taints
the variable.
memwrite( ADDR, STRING, POS, SIZE )
Writes SIZE bytes from STRING to a memory segment at ADDR starting
at position POS. If STRING is too long, only SIZE bytes are used;
if STRING is too short, nulls are written to fill out SIZE bytes.
Returns true if successful, or false if there is an error.
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
+---------------+-----------------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+-----------------------+
|Availability | runtime/perl-532 |
+---------------+-----------------------+
|Stability | Pass-through volatile |
+---------------+-----------------------+
SEE ALSO
IPC::Msg, IPC::Semaphore, IPC::SharedMem, ftok(3), shmat(2), shmdt(2)
AUTHORS
Graham Barr <gbarr@pobox.com>, Jarkko Hietaniemi <jhi@iki.fi>, Marcus
Holland-Moritz <mhx@cpan.org>
COPYRIGHT
Version 2.x, Copyright (C) 2007-2013, Marcus Holland-Moritz.
Version 1.x, Copyright (c) 1997, Graham Barr.
This program is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
NOTES
Source code for open source software components in Oracle Solaris can
be found at https://www.oracle.com/downloads/opensource/solaris-source-
code-downloads.html.
This software was built from source available at
https://github.com/oracle/solaris-userland. The original community
source was downloaded from
http://www.cpan.org/src/5.0/perl-5.32.0.tar.gz.
Further information about this software can be found on the open source
community website at https://www.perl.org/.
perl v5.32.0 2020-06-14 IPC::SysV(3)