IPC::SysV - System V IPC constants and system calls

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.

AUTHORS

Graham Barr <gbarr@pobox.com>, Jarkko Hietaniemi <jhi@iki.fi>, Marcus Holland-Moritz <mhx@cpan.org>

COPYRIGHT