Mail::Box::Locker::FcntlLock(3)

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.

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

    expires => SECONDS
    file => FILENAME
    folder => FOLDER
    log => LEVEL
    method => STRING|CLASS|ARRAY
    timeout => SECONDS|'NOTIMEOUT'
    trace => LEVEL

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

$obj->expires( [SECONDS] )
    Inherited, see "Attributes" in Mail::Box::Locker

$obj->timeout( [SECONDS] )
    Inherited, see "Attributes" in Mail::Box::Locker

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

$obj->filename( [$filename] )
    Inherited, see "The Locker" in Mail::Box::Locker

$obj->folder( [$folder] )
    Inherited, see "The Locker" in Mail::Box::Locker

$obj->name()
    Inherited, see "The Locker" in Mail::Box::Locker

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

$obj->hasLock()
    Inherited, see "Locking" in Mail::Box::Locker

$obj->isLocked()
$obj->lock()
$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

$obj->defaultTrace( [$level]|[$loglevel, $tracelevel]|[$level, $callback] )
Mail::Box::Locker::FcntlLock->defaultTrace( [$level]|[$loglevel, $tracelevel]|[$level, $callback] )
    Inherited, see "Error handling" in Mail::Reporter

$obj->errors()
    Inherited, see "Error handling" in Mail::Reporter

$obj->log( [$level, [$strings]] )
Mail::Box::Locker::FcntlLock->log( [$level, [$strings]] )
    Inherited, see "Error handling" in Mail::Reporter

$obj->logPriority($level)
Mail::Box::Locker::FcntlLock->logPriority($level)
    Inherited, see "Error handling" in Mail::Reporter

$obj->logSettings()
    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
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.

Error: Unable to check lock file $filename 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.

Error: Unable to open FcntlLock lock file $filename for $folder: $!
    For FcntlLock style locking, a folder it must be opened, which does not succeed for the specified reason.

Error: Will never get a FcntlLock lock at $filename 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.

SEE ALSO
This module is part of Mail-Box distribution version 3.011, built on April 18, 2025. Website: http://perl.overmeer.net/CPAN/

LICENSE
Copyrights 2001-2025 by [Mark Overmeer]. For other contributors see ChangeLog.

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. See http://dev.perl.org/licenses/