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.\" Automatically generated by Pod::Man 2.25 (Pod::Simple 3.20) .\" .\" Standard preamble: .\" ======================================================================== .de Sp \" Vertical space (when we can't use .PP) .if t .sp .5v .if n .sp .. .de Vb \" Begin verbatim text .ft CW .nf .ne \\$1 .. .de Ve \" End verbatim text .ft R .fi .. .\" Set up some character translations and predefined strings. \*(-- will .\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left .\" double quote, and \*(R" will give a right double quote. \*(C+ will .\" give a nicer C++. Capital omega is used to do unbreakable dashes and .\" therefore won't be available. \*(C` and \*(C' expand to `' in nroff, .\" nothing in troff, for use with C<>. .tr \(*W- .ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p' .ie n \{\ . ds -- \(*W- . ds PI pi . if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch . if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch . ds L" "" . ds R" "" . ds C` "" . ds C' "" 'br\} .el\{\ . ds -- \|\(em\| . ds PI \(*p . ds L" `` . ds R" '' 'br\} .\" .\" Escape single quotes in literal strings from groff's Unicode transform. .ie \n(.g .ds Aq \(aq .el .ds Aq ' .\" .\" If the F register is turned on, we'll generate index entries on stderr for .\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index .\" entries marked with X<> in POD. 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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" IPC::SysV \- System V IPC constants and system calls .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& use IPC::SysV qw(IPC_STAT IPC_PRIVATE); .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" \&\f(CW\*(C`IPC::SysV\*(C'\fR defines and conditionally exports all the constants defined in your system include files which are needed by the SysV \&\s-1IPC\s0 calls. Common ones include .PP .Vb 4 \& 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 .Ve .PP and auxiliary ones .PP .Vb 3 \& S_IRUSR S_IWUSR S_IRWXU \& S_IRGRP S_IWGRP S_IRWXG \& S_IROTH S_IWOTH S_IRWXO .Ve .PP but your system might have more. .IP "ftok( \s-1PATH\s0 )" 4 .IX Item "ftok( PATH )" .PD 0 .IP "ftok( \s-1PATH\s0, \s-1ID\s0 )" 4 .IX Item "ftok( PATH, ID )" .PD Return a key based on \s-1PATH\s0 and \s-1ID\s0, which can be used as a key for \&\f(CW\*(C`msgget\*(C'\fR, \f(CW\*(C`semget\*(C'\fR and \f(CW\*(C`shmget\*(C'\fR. See ftok. .Sp If \s-1ID\s0 is omitted, it defaults to \f(CW1\fR. If a single character is given for \s-1ID\s0, the numeric value of that character is used. .IP "shmat( \s-1ID\s0, \s-1ADDR\s0, \s-1FLAG\s0 )" 4 .IX Item "shmat( ID, ADDR, FLAG )" Attach the shared memory segment identified by \s-1ID\s0 to the address space of the calling process. See shmat. .Sp \&\s-1ADDR\s0 should be \f(CW\*(C`undef\*(C'\fR unless you really know what you're doing. .IP "shmdt( \s-1ADDR\s0 )" 4 .IX Item "shmdt( ADDR )" Detach the shared memory segment located at the address specified by \s-1ADDR\s0 from the address space of the calling process. See shmdt. .IP "memread( \s-1ADDR\s0, \s-1VAR\s0, \s-1POS\s0, \s-1SIZE\s0 )" 4 .IX Item "memread( ADDR, VAR, POS, SIZE )" Reads \s-1SIZE\s0 bytes from a memory segment at \s-1ADDR\s0 starting at position \s-1POS\s0. \&\s-1VAR\s0 must be a variable that will hold the data read. Returns true if successful, or false if there is an error. \fImemread()\fR taints the variable. .IP "memwrite( \s-1ADDR\s0, \s-1STRING\s0, \s-1POS\s0, \s-1SIZE\s0 )" 4 .IX Item "memwrite( ADDR, STRING, POS, SIZE )" Writes \s-1SIZE\s0 bytes from \s-1STRING\s0 to a memory segment at \s-1ADDR\s0 starting at position \s-1POS\s0. If \s-1STRING\s0 is too long, only \s-1SIZE\s0 bytes are used; if \s-1STRING\s0 is too short, nulls are written to fill out \s-1SIZE\s0 bytes. Returns true if successful, or false if there is an error. .SH "SEE ALSO" .IX Header "SEE ALSO" IPC::Msg, IPC::Semaphore, IPC::SharedMem, ftok, shmat, shmdt .SH "AUTHORS" .IX Header "AUTHORS" Graham Barr <gbarr@pobox.com>, Jarkko Hietaniemi <jhi@iki.fi>, Marcus Holland-Moritz <mhx@cpan.org> .SH "COPYRIGHT" .IX Header "COPYRIGHT" Version 2.x, Copyright (C) 2007\-2010, Marcus Holland-Moritz. .PP Version 1.x, Copyright (c) 1997, Graham Barr. .PP This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.