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25 May 2011 14:16:31 UTC
- Distribution: PerlIO-Util
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Bus factor: 1- 100.00% Coverage
- License: perl_5
- Perl: v5.8.1
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NAME
PerlIO::flock - Easy flock() interface
SYNOPSIS
open my $in, '< :flock', $file; # shared lock open my $out, '+<:flock', $file; # exclusive lock binmode($fh, ':flock(blocking)'); binmode($fh, ':flock(non-blocking)');
DESCRIPTION
PerlIO::flock
provides an interface toflock()
.It tries to lock the filehandle with
flock()
according to the open mode. That is, if a file is opened for writing,:flock
attempts exclusive lock (using LOCK_EX). Otherwise, it attempts shared lock (using LOCK_SH).It waits until the lock is granted. If an argument
non-blocking
(orLOCK_NB
) is supplied, the call ofopen()
(orbinmode()
) fails when the lock cannot be granted.This is a pseudo layer that doesn't be pushed on the layer stack.
EXAMPLE
# tries shared lock, or waits until the lock is granted open my $in, "<:flock", $file; open my $in, "<:flock(blocking)", $file; # ditto. # tries shared lock, or returns undef open my $in, "<:flock(non-blocking)", $file; open my $in, "<:flock(LOCK_NB)", $file; # ditto.
SEE ALSO
AUTHOR
Goro Fuji (藤 吾郎) <gfuji (at) cpan.org>
LICENSE AND COPYRIGHT
Copyright (c) 2008, Goro Fuji <gfuji (at) cpan.org>. Some rights reserved.
This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
Module Install Instructions
To install PerlIO::Util, copy and paste the appropriate command in to your terminal.
cpanm PerlIO::Util
perl -MCPAN -e shell install PerlIO::Util
For more information on module installation, please visit the detailed CPAN module installation guide.