/usr/share/perl5/Mail/Box/MH/Index.pod is in libmail-box-perl 2.099-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | =head1 NAME
Mail::Box::MH::Index - keep index files for messages.
=head1 INHERITANCE
Mail::Box::MH::Index
is a Mail::Reporter
=head1 SYNOPSIS
my $index = Mail::Box::MH::Index->new;
$index->read(...)
$index->write(...)
=head1 DESCRIPTION
Message folders which store their data in one single file per message are
very inefficient for producing subject overviews and for computing message
threads. The C<Mail::Box::MH::Index> object is able to store and read a the
headers of a set of C<Mail::Box::MH::Message> messages which are
part of a single C<Mail::Box::MH> folder in one file.
When the C<Mail::Box::MH::Index> functionality is enabled by specifying
L<Mail::Box::MH::new(keep_index)|Mail::Box::MH/"METHODS"> when opening a folder, the index file
is automatically read. When the folder is closed, a new index file is
created.
Special care is taken to avoid problems which occur when the user changes
or removes message files without updating the index. If the index is not
trustworthy it will not be used (costing some performance for the reader
of the folder).
=head1 METHODS
=head2 Constructors
=over 4
=item Mail::Box::MH::Index-E<gt>B<new>(OPTIONS)
-Option --Defined in --Default
filename <required>
head_type Mail::Message::Head::Subset
head_wrap 72
log Mail::Reporter 'WARNINGS'
trace Mail::Reporter 'WARNINGS'
=over 2
=item filename => FILENAME
The FILENAME which is used to store the headers of all the e-mails for
one folder. This must be an absolute pathname.
=item head_type => CLASS
The type of headers which will be used to store header information when
it is read from the index file. You can not be sure the index contains
all header line (the mailbox may have been updated without updating
the index) so this will usually be (an sub-class of)
L<Mail::Message::Head::Subset|Mail::Message::Head::Subset>.
=item head_wrap => INTEGER
The preferred number of character in each header line.
=item log => LEVEL
=item trace => LEVEL
=back
=back
=head2 The Index
=over 4
=item $obj-E<gt>B<append>(MESSAGES)
Append MESSAGES to the index file.
=item $obj-E<gt>B<filename>
Returns the name of the index file.
=item $obj-E<gt>B<get>(MSGFILE)
Look if there is header info for the specified MSGFILE. The filename
represents one message in folder type which are organized as directory.
This method will return an object of the L<new(head_type)|Mail::Box::MH::Index/"Constructors"> as specified
during creation of the index object, or C<undef> if the information
is not known or not trustworthy -i.e. the file size changed.
=item $obj-E<gt>B<read>
Read the index file. The header objects can after this be requested
with the L<get()|Mail::Box::MH::Index/"The Index"> method.
=item $obj-E<gt>B<write>(MESSAGES)
Write an index file containing the headers specified MESSAGES
(L<Mail::Message|Mail::Message> objects).
=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::MH::Index-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::MH::Index-E<gt>B<log>([LEVEL [,STRINGS]])
See L<Mail::Reporter/"Error handling">
=item $obj-E<gt>B<logPriority>(LEVEL)
=item Mail::Box::MH::Index-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::Reporter/"Cleanup">
=item $obj-E<gt>B<inGlobalDestruction>
See L<Mail::Reporter/"Cleanup">
=back
=head1 DIAGNOSTICS
=over 4
=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.
=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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