Mail::Box::Locker::Flock(3pm) User Contributed Perl Documentation Mail::Box::Locker::Flock(3pm)

Mail::Box::Locker::Flock - lock a folder using kernel file-locking

 Mail::Box::Locker::Flock
   is a Mail::Box::Locker
   is a Mail::Reporter


 See Mail::Box::Locker

The "::Flock" object locks the folder by creating an exclusive lock on the file using the kernel's "flock" facilities. This lock is created on a separate file-handle to the folder file, so not the handle which is reading.

File locking does not work in some situations, for instance for operating systems do not support "flock".

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

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

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

 -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  'FLOCK'
  timeout  Mail::Box::Locker  10
  trace    Mail::Reporter     'WARNINGS'

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

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

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

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

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

$obj->DESTROY()
Inherited, see "Cleanup" in Mail::Box::Locker

The folder is already locked, but you attempt to lock it again. The behavior of double flock's is platform dependent, and therefore should not be attempted. The second lock is ignored (but the unlock isn't)
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.
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.
For flock-ing a folder it must be opened, which does not succeed for the specified reason.
Tried to flock 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.

This module is part of Mail-Box distribution version 3.010, built on July 18, 2023. Website: http://perl.overmeer.net/CPAN/

Copyrights 2001-2023 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/

2023-12-11 perl v5.36.0