IPC::SysV - man - phpman

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.

SEE ALSO
    IPC::Msg, IPC::Semaphore, IPC::SharedMem, ftok(3), shmat(2), shmdt(2)

AUTHORS
    Graham Barr <gbarr AT pobox.com>, Jarkko Hietaniemi <jhi AT iki.fi>, Marcus Holland-Moritz
    <mhx AT 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.