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Manual Reference Pages  -  MAIL::BOX::LOCKER::POSIX (3)

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NAME

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

CONTENTS

INHERITANCE



 Mail::Box::Locker::POSIX
   is a Mail::Box::Locker
   is a Mail::Reporter



SYNOPSIS



 See Mail::Box::Locker



DESCRIPTION

This locker object is created by the folder to get an exclusive lock on the file which contains the data using the kernel’s POSIX facilities. This lock is created on a separate file-handle to the folder file, so not the handle which is reading. Not all platforms support POSIX locking.

See documentation in the base class.

METHODS

See documentation in the base class.

    Constructors

See documentation in the base class.
Mail::Box::Locker::POSIX-><B>newB>(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  POSIX
  posix_file                     <undef>
  timeout     Mail::Box::Locker  10 seconds
  trace       Mail::Reporter     WARNINGS



expires => SECONDS
file => FILENAME
folder => FOLDER
log => LEVEL
method => STRING|CLASS|ARRAY
posix_file => FILENAME Alternative name for file, especially useful to avoid confusion when the multi-locker is used.
timeout => SECONDS|’NOTIMEOUT
trace => LEVEL

    The Locker

See documentation in the base class.
$obj-><B>filenameB>([FILENAME]) See The Locker in Mail::Box::Locker
$obj-><B>folderB>([FOLDER]) See The Locker in Mail::Box::Locker
$obj-><B>nameB>() See The Locker in Mail::Box::Locker

    Locking

See documentation in the base class.
$obj-><B>hasLockB>() See Locking in Mail::Box::Locker
$obj-><B>isLockedB>()
$obj-><B>lockB>()
$obj-><B>unlockB>() See Locking in Mail::Box::Locker

    Error handling

See documentation in the base class.
$obj-><B>AUTOLOADB>() See Error handling in Mail::Reporter
$obj-><B>addReportB>(OBJECT) See Error handling in Mail::Reporter
$obj-><B>defaultTraceB>([LEVEL]|[LOGLEVEL, TRACELEVEL]|[LEVEL, CALLBACK])
Mail::Box::Locker::POSIX-><B>defaultTraceB>([LEVEL]|[LOGLEVEL, TRACELEVEL]|[LEVEL, CALLBACK]) See Error handling in Mail::Reporter
$obj-><B>errorsB>() See Error handling in Mail::Reporter
$obj-><B>logB>([LEVEL [,STRINGS]])
Mail::Box::Locker::POSIX-><B>logB>([LEVEL [,STRINGS]]) See Error handling in Mail::Reporter
$obj-><B>logPriorityB>(LEVEL)
Mail::Box::Locker::POSIX-><B>logPriorityB>(LEVEL) See Error handling in Mail::Reporter
$obj-><B>logSettingsB>() See Error handling in Mail::Reporter
$obj-><B>notImplementedB>() See Error handling in Mail::Reporter
$obj-><B>reportB>([LEVEL]) See Error handling in Mail::Reporter
$obj-><B>reportAllB>([LEVEL]) See Error handling in Mail::Reporter
$obj-><B>traceB>([LEVEL]) See Error handling in Mail::Reporter
$obj-><B>warningsB>() See Error handling in Mail::Reporter

    Cleanup

See documentation in the base class.
$obj-><B>DESTROYB>() 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 POSIX lock file $filename for $folder: $! For POSIX style locking, a folder it must be opened, which does not succeed for the specified reason.
Error: Will never get a POSIX 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 2.109, built on August 19, 2013. Website: http://perl.overmeer.net/mailbox/

LICENSE

Copyrights 2001-2013 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://www.perl.com/perl/misc/Artistic.html

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perl v5.20.3 MAIL::BOX::LOCKER::POSIX (3) 2013-08-19

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