Mail::Box::Locker::POSUser)Contributed Perl DocumenMail::Box::Locker::POSIX(3)NAMEMail::Box::Locker::POSIX - lock a folder using kernel file-locking
INHERITANCEMail::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.
METHODS
Constructors
Mail::Box::Locker::POSIX->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 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
$obj->filename([FILENAME])
See "The Locker" in Mail::Box::Locker
$obj->folder([FOLDER])
See "The Locker" in Mail::Box::Locker
$obj->name
See "The Locker" in Mail::Box::Locker
Locking
$obj->hasLock
See "Locking" in Mail::Box::Locker
$obj->isLocked
$obj->lock
$obj->unlock
See "Locking" in Mail::Box::Locker
Error handling
$obj->AUTOLOAD
See "Error handling" in Mail::Reporter
$obj->addReport(OBJECT)
See "Error handling" in Mail::Reporter
$obj->defaultTrace([LEVEL]|[LOGLEVEL, TRACELEVEL]|[LEVEL, CALLBACK])
Mail::Box::Locker::POSIX->defaultTrace([LEVEL]|[LOGLEVEL,
TRACELEVEL]|[LEVEL, CALLBACK])
See "Error handling" in Mail::Reporter
$obj->errors
See "Error handling" in Mail::Reporter
$obj->log([LEVEL [,STRINGS]])
Mail::Box::Locker::POSIX->log([LEVEL [,STRINGS]])
See "Error handling" in Mail::Reporter
$obj->logPriority(LEVEL)
Mail::Box::Locker::POSIX->logPriority(LEVEL)
See "Error handling" in Mail::Reporter
$obj->logSettings
See "Error handling" in Mail::Reporter
$obj->notImplemented
See "Error handling" in Mail::Reporter
$obj->report([LEVEL])
See "Error handling" in Mail::Reporter
$obj->reportAll([LEVEL])
See "Error handling" in Mail::Reporter
$obj->trace([LEVEL])
See "Error handling" in Mail::Reporter
$obj->warnings
See "Error handling" in Mail::Reporter
Cleanup
$obj->DESTROY
See "Cleanup" in Mail::Box::Locker
$obj->inGlobalDestruction
See "Cleanup" in Mail::Reporter
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 2.097, built on
January 26, 2011. Website: http://perl.overmeer.net/mailbox/
LICENSE
Copyrights 2001-2011 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
perl v5.14.1 2011-01-26 Mail::Box::Locker::POSIX(3)
