IPC::SysV - System V IPC constants and system calls
- use IPC::SysV qw(IPC_STAT IPC_PRIVATE);
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_CREATE 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 )
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.
ADDR should be
undefunless 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.
- 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.
Graham Barr <firstname.lastname@example.org>, Jarkko Hietaniemi <email@example.com>, Marcus Holland-Moritz <firstname.lastname@example.org>
Version 2.x, Copyright (C) 2007-2010, 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.