NAME

Mail::Box::Locker::FcntlLock - lock a folder using File::FcntlLock

INHERITANCE

Mail::Box::Locker::FcntlLock
  is a Mail::Box::Locker
  is a Mail::Reporter

SYNOPSIS

See Mail::Box::Locker

DESCRIPTION

This locker object is uses File::FcntlLock, and was contributed by Jim in Aus. It is close to Mail::Box::Locker::POSIX, but does work on more systems, for instance Darwin.

You will need to install File::FcntlLock separately: there is no dependency to it by the MailBox distribution.

Extends "DESCRIPTION" in Mail::Box::Locker.

METHODS

Extends "METHODS" in Mail::Box::Locker.

Constructors

Extends "Constructors" in Mail::Box::Locker.

$class->new(%options)

Inherited, see "METHODS" in Mail::Box::Locker

-Option --Defined in       --Default
 expires  Mail::Box::Locker  1 hour
 file     Mail::Box::Locker  undef
 folder   Mail::Box::Locker  <C<undef>>
 log      Mail::Reporter     'WARNINGS'
 method   Mail::Box::Locker  FcntlLock
 timeout  Mail::Box::Locker  10
 trace    Mail::Reporter     'WARNINGS'

expires => $seconds

file => $file

folder => $folder

log => LEVEL

method => $name|CLASS|\@names

timeout => $seconds|'NOTIMEOUT'

trace => LEVEL

Attributes

Extends "Attributes" in Mail::Box::Locker.

$obj->expires( [SECONDS] )

Inherited, see "Attributes" in Mail::Box::Locker

$obj->filename( [$filename] )

Inherited, see "Attributes" in Mail::Box::Locker

$obj->folder( [$folder] )

Inherited, see "Attributes" in Mail::Box::Locker

$obj->logSettings()

Inherited, see "Attributes" in Mail::Reporter

$obj->name()

Inherited, see "Attributes" in Mail::Box::Locker

$obj->timeout( [SECONDS] )

Inherited, see "Attributes" in Mail::Box::Locker

Locking

Extends "Locking" in Mail::Box::Locker.

$obj->hasLock()

Inherited, see "Locking" in Mail::Box::Locker

$obj->isLocked()

Inherited, see "Locking" in Mail::Box::Locker

$obj->lock()

Inherited, see "Locking" in Mail::Box::Locker

$obj->unlock()

Inherited, see "Locking" in Mail::Box::Locker

Error handling

Extends "Error handling" in Mail::Box::Locker.

$obj->AUTOLOAD()

Inherited, see "Error handling" in Mail::Reporter

$obj->addReport($object)

Inherited, see "Error handling" in Mail::Reporter

$any->defaultTrace( [$level]|[$loglevel, $tracelevel]|[$level, $callback] )

Inherited, see "Error handling" in Mail::Reporter

$obj->errors()

Inherited, see "Error handling" in Mail::Reporter

$any->log( [$level, [$strings]] )

Inherited, see "Error handling" in Mail::Reporter

$any->logPriority($level)

Inherited, see "Error handling" in Mail::Reporter

$obj->notImplemented()

Inherited, see "Error handling" in Mail::Reporter

$obj->report( [$level] )

Inherited, see "Error handling" in Mail::Reporter

$obj->reportAll( [$level] )

Inherited, see "Error handling" in Mail::Reporter

$obj->trace( [$level] )

Inherited, see "Error handling" in Mail::Reporter

$obj->warnings()

Inherited, see "Error handling" in Mail::Reporter

Cleanup

Extends "Cleanup" in Mail::Box::Locker.

$obj->DESTROY()

Inherited, see "Cleanup" in Mail::Box::Locker

DIAGNOSTICS

Warning: Folder $folder already lockf'd

Cast by lock()

Error: Package $package does not implement $method.

Fatal error: the specific package (or one of its superclasses) does not implement this method where it should. This message means that some other related classes do implement this method however the class at hand does not. Probably you should investigate this and probably inform the author of the package. Cast by notImplemented()

Error: Unable to check lock file $file for $folder: $!

To check whether the filename is used to flock a folder, the file must be opened. Apparently this fails, which does not mean that the folder is locked neither that it is unlocked. Cast by isLocked()

Error: Unable to open FcntlLock lock file $file for $folder: $!

For FcntlLock style locking, a $folder it must be opened, which does not succeed for the specified reason. Cast by lock()

Error: Will never get a FcntlLock lock at $file for $folder: $!

Tried to lock the $folder, but it did not succeed. The error code received from the OS indicates that it will not succeed ever, so we do not need to try again. Cast by lock()

SEE ALSO

This module is part of Mail-Box version 3.012, built on November 27, 2025. Website: http://perl.overmeer.net/CPAN/

LICENSE

For contributors see file ChangeLog.

This software is copyright (c) 2001-2025 by Mark Overmeer.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

cpanm Mail::Box

perl -MCPAN -e shell
install Mail::Box