FM / 5.34.0

/usr/lib/x86_64-linux-gnu/perl/5.34.0/

/usr/lib/x86_64-linux-gnu/perl/5.34.0

Name	Size	Mode	Actions
asm/	-	0755	rm
asm-generic/	-	0755	rm
auto/	-	0755	rm
B/	-	0755	rm
bits/	-	0755	rm
Compress/	-	0755	rm
CORE/	-	0755	rm
Data/	-	0755	rm
Devel/	-	0755	rm
Digest/	-	0755	rm
Encode/	-	0755	rm
File/	-	0755	rm
Filter/	-	0755	rm
gnu/	-	0755	rm
Hash/	-	0755	rm
I18N/	-	0755	rm
IO/	-	0755	rm
IPC/	-	0755	rm
linux/	-	0755	rm
List/	-	0755	rm
machine/	-	0755	rm
Math/	-	0755	rm
MIME/	-	0755	rm
PerlIO/	-	0755	rm
Scalar/	-	0755	rm
Sub/	-	0755	rm
Sys/	-	0755	rm
sys/	-	0755	rm
threads/	-	0755	rm
Time/	-	0755	rm
Unicode/	-	0755	rm
attributes.pm	16353	0644	edit dl rm
B.pm	30093	0644	edit dl rm
Config.pm	3217	0644	edit dl rm
Config.pod	256066	0644	edit dl rm
Config_git.pl	409	0644	edit dl rm
Config_heavy.pl	55332	0644	edit dl rm
Cwd.pm	21942	0644	edit dl rm
DB_File.pm	67004	0644	edit dl rm
DynaLoader.pm	25243	0644	edit dl rm
Encode.pm	32085	0644	edit dl rm
encoding.pm	22950	0644	edit dl rm
endian.ph	3627	0644	edit dl rm
errno.ph	23	0644	edit dl rm
Errno.pm	6586	0644	edit dl rm
Fcntl.pm	4044	0644	edit dl rm
features-time64.ph	811	0644	edit dl rm
features.ph	14995	0644	edit dl rm
GDBM_File.pm	7788	0644	edit dl rm
IO.pm	1462	0644	edit dl rm
lib.pm	6136	0644	edit dl rm
mro.pm	9846	0644	edit dl rm
NDBM_File.pm	3084	0644	edit dl rm
O.pm	4291	0644	edit dl rm
ODBM_File.pm	2970	0644	edit dl rm
Opcode.pm	16282	0644	edit dl rm
ops.pm	997	0644	edit dl rm
POSIX.pm	20384	0644	edit dl rm
POSIX.pod	82515	0644	edit dl rm
re.pm	28657	0644	edit dl rm
SDBM_File.pm	3809	0644	edit dl rm
signal.ph	3700	0644	edit dl rm
Socket.pm	37027	0644	edit dl rm
stdarg.ph	2870	0644	edit dl rm
stdc-predef.ph	1220	0644	edit dl rm
stddef.ph	11925	0644	edit dl rm
Storable.pm	49923	0644	edit dl rm
syscall.ph	86	0644	edit dl rm
sysexits.ph	1286	0644	edit dl rm
syslimits.ph	452	0644	edit dl rm
syslog.ph	85	0644	edit dl rm
threads.pm	37951	0644	edit dl rm
unistd.ph	10358	0644	edit dl rm
wait.ph	83	0644	edit dl rm
_h2ph_pre.ph	31302	0644	edit dl rm

Edit: /usr/lib/x86_64-linux-gnu/perl/5.34.0/SDBM_File.pm (3809B)

package SDBM_File;

use strict;
use warnings;

require Tie::Hash;
require XSLoader;

our @ISA = qw(Tie::Hash);
our $VERSION = "1.15";

our @EXPORT_OK = qw(PAGFEXT DIRFEXT PAIRMAX);
use Exporter "import";

XSLoader::load();

__END__

=head1 NAME

SDBM_File - Tied access to sdbm files

=head1 SYNOPSIS

use Fcntl;   # For O_RDWR, O_CREAT, etc.
 use SDBM_File;

tie(%h, 'SDBM_File', 'filename', O_RDWR|O_CREAT, 0666)
   or die "Couldn't tie SDBM file 'filename': $!; aborting";

# Now read and change the hash
 $h{newkey} = newvalue;
 print $h{oldkey}; 
 ...

untie %h;

=head1 DESCRIPTION

C<SDBM_File> establishes a connection between a Perl hash variable and
a file in SDBM_File format.  You can manipulate the data in the file
just as if it were in a Perl hash, but when your program exits, the
data will remain in the file, to be used the next time your program
runs.

=head2 Tie

Use C<SDBM_File> with the Perl built-in C<tie> function to establish
the connection between the variable and the file.

tie %hash, 'SDBM_File', $basename, $modeflags, $perms;

tie %hash, 'SDBM_File', $dirfile,  $modeflags, $perms, $pagfilename;

C<$basename> is the base filename for the database.  The database is two
files with ".dir" and ".pag" extensions appended to C<$basename>,

$basename.dir     (or .sdbm_dir on VMS, per DIRFEXT constant)
    $basename.pag

The two filenames can also be given separately in full as C<$dirfile>
and C<$pagfilename>.  This suits for two files without ".dir" and ".pag"
extensions, perhaps for example two files from L<File::Temp>.

C<$modeflags> can be the following constants from the C<Fcntl> module (in
the style of the L<open(2)> system call),

O_RDONLY          read-only access
    O_WRONLY          write-only access
    O_RDWR            read and write access

If you want to create the file if it does not already exist then bitwise-OR
(C<|>) C<O_CREAT> too.  If you omit C<O_CREAT> and the database does not
already exist then the C<tie> call will fail.

O_CREAT           create database if doesn't already exist

C<$perms> is the file permissions bits to use if new database files are
created.  This parameter is mandatory even when not creating a new database.
The permissions will be reduced by the user's umask so the usual value here
would be 0666, or if some very private data then 0600.  (See
L<perlfunc/umask>.)

=head1 EXPORTS

SDBM_File optionally exports the following constants:

=over

=item *

C<PAGFEXT> - the extension used for the page file, usually C<.pag>.

=item *

C<DIRFEXT> - the extension used for the directory file, C<.dir>
everywhere but VMS, where it is C<.sdbm_dir>.

=item *

C<PAIRMAX> - the maximum size of a stored hash entry, including the
length of both the key and value.

=back

These constants can also be used with fully qualified names,
eg. C<SDBM_File::PAGFEXT>.

=head1 DIAGNOSTICS

On failure, the C<tie> call returns an undefined value and probably
sets C<$!> to contain the reason the file could not be tied.

=head2 C<sdbm store returned -1, errno 22, key "..." at ...>

This warning is emitted when you try to store a key or a value that
is too long.  It means that the change was not recorded in the
database.  See BUGS AND WARNINGS below.

=head1 SECURITY WARNING

B<Do not accept SDBM files from untrusted sources!>

The sdbm file format was designed for speed and convenience, not for
portability or security.  A maliciously crafted file might cause perl to
crash or even expose a security vulnerability.

=head1 BUGS AND WARNINGS

There are a number of limits on the size of the data that you can
store in the SDBM file.  The most important is that the length of a
key, plus the length of its associated value, may not exceed 1008
bytes.

See L<perlfunc/tie>, L<perldbmfilter>, L<Fcntl>

=cut

cmd: