/usr/share/perl5/Mail/Box/Locker/NFS.pod is in libmail-box-perl 2.099-1.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 | =head1 NAME
Mail::Box::Locker::NFS - lock a folder with a separate file, NFS-safe
=head1 INHERITANCE
Mail::Box::Locker::NFS
is a Mail::Box::Locker
is a Mail::Reporter
=head1 SYNOPSIS
See Mail::Box::Locker
=head1 DESCRIPTION
Like the C<::DotLock> locker, but then in an NFS-safe fashion. Over NFS,
the creation of a file is not atomic. The C<::DotLock> locker depends
on an atomic C<open> system call, hence in not usable to lock a folder
which accessed over NFS. The C<::NFS>
locker is therefore more complicated (so therefore slower), but will work
for NFS --and for local disks as well.
=head1 METHODS
=head2 Constructors
=over 4
=item Mail::Box::Locker::NFS-E<gt>B<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 'NFS'
timeout Mail::Box::Locker 10 seconds
trace Mail::Reporter 'WARNINGS'
=over 2
=item expires => SECONDS
=item file => FILENAME
=item folder => FOLDER
=item log => LEVEL
=item method => STRING|CLASS|ARRAY
=item timeout => SECONDS|'NOTIMEOUT'
=item trace => LEVEL
=back
=back
=head2 The Locker
=over 4
=item $obj-E<gt>B<filename>([FILENAME])
See L<Mail::Box::Locker/"The Locker">
=item $obj-E<gt>B<folder>([FOLDER])
See L<Mail::Box::Locker/"The Locker">
=item $obj-E<gt>B<name>
See L<Mail::Box::Locker/"The Locker">
=back
=head2 Locking
=over 4
=item $obj-E<gt>B<hasLock>
See L<Mail::Box::Locker/"Locking">
=item $obj-E<gt>B<isLocked>
See L<Mail::Box::Locker/"Locking">
=item $obj-E<gt>B<lock>
=item $obj-E<gt>B<unlock>
See L<Mail::Box::Locker/"Locking">
=back
=head2 Error handling
=over 4
=item $obj-E<gt>B<AUTOLOAD>
See L<Mail::Reporter/"Error handling">
=item $obj-E<gt>B<addReport>(OBJECT)
See L<Mail::Reporter/"Error handling">
=item $obj-E<gt>B<defaultTrace>([LEVEL]|[LOGLEVEL, TRACELEVEL]|[LEVEL, CALLBACK])
=item Mail::Box::Locker::NFS-E<gt>B<defaultTrace>([LEVEL]|[LOGLEVEL, TRACELEVEL]|[LEVEL, CALLBACK])
See L<Mail::Reporter/"Error handling">
=item $obj-E<gt>B<errors>
See L<Mail::Reporter/"Error handling">
=item $obj-E<gt>B<log>([LEVEL [,STRINGS]])
=item Mail::Box::Locker::NFS-E<gt>B<log>([LEVEL [,STRINGS]])
See L<Mail::Reporter/"Error handling">
=item $obj-E<gt>B<logPriority>(LEVEL)
=item Mail::Box::Locker::NFS-E<gt>B<logPriority>(LEVEL)
See L<Mail::Reporter/"Error handling">
=item $obj-E<gt>B<logSettings>
See L<Mail::Reporter/"Error handling">
=item $obj-E<gt>B<notImplemented>
See L<Mail::Reporter/"Error handling">
=item $obj-E<gt>B<report>([LEVEL])
See L<Mail::Reporter/"Error handling">
=item $obj-E<gt>B<reportAll>([LEVEL])
See L<Mail::Reporter/"Error handling">
=item $obj-E<gt>B<trace>([LEVEL])
See L<Mail::Reporter/"Error handling">
=item $obj-E<gt>B<warnings>
See L<Mail::Reporter/"Error handling">
=back
=head2 Cleanup
=over 4
=item $obj-E<gt>B<DESTROY>
See L<Mail::Box::Locker/"Cleanup">
=item $obj-E<gt>B<inGlobalDestruction>
See L<Mail::Reporter/"Cleanup">
=back
=head1 DIAGNOSTICS
=over 4
=item Warning: Folder $folder already locked over nfs
Do not try to lock the folder when the application already has the
lock: it will give you dead-locks.
=item 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.
=item Warning: Removed expired lockfile $filename.
A lock file was found which was older than the expiration period as
specified with L<new(timeout)|Mail::Box::Locker/"METHODS">. The lock file was successfully
removed.
=item Error: Unable to remove expired lockfile $lockfile: $!
A lock file was found which was older than the expiration period as
specified with the L<new(timeout)|Mail::Box::Locker/"METHODS"> option. It is impossible to remove that
lock file, so we need to wait until it vanishes by some external cause.
=back
=head1 SEE ALSO
This module is part of Mail-Box distribution version 2.099,
built on July 07, 2011. Website: F<http://perl.overmeer.net/mailbox/>
=head1 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 F<http://www.perl.com/perl/misc/Artistic.html>
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