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Name	Size	Modified	Perms
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📁 B	-	08/27/2024 05:22:04 PM	rwxr-xr-x
📄 B.pm	28.78 KB	04/03/2024 02:35:12 PM	rw-r--r--
📁 CORE	-	08/27/2024 05:20:51 PM	rwxr-xr-x
📄 Config.pm	3.12 KB	04/03/2024 02:35:12 PM	rw-r--r--
📄 Config.pod	248.73 KB	04/03/2024 02:35:12 PM	rw-r--r--
📄 Config_git.pl	409 bytes	04/03/2024 02:35:12 PM	rw-r--r--
📄 Config_heavy.pl	57.05 KB	04/03/2024 02:35:12 PM	rw-r--r--
📄 DynaLoader.pm	24.66 KB	04/03/2024 02:35:12 PM	rw-r--r--
📄 Errno.pm	6.7 KB	04/03/2024 02:35:12 PM	rw-r--r--
📄 Fcntl.pm	3.95 KB	04/03/2024 02:35:12 PM	rw-r--r--
📁 File	-	08/27/2024 05:20:51 PM	rwxr-xr-x
📁 IO	-	08/27/2024 05:20:51 PM	rwxr-xr-x
📄 IO.pm	1.42 KB	04/03/2024 02:35:12 PM	rw-r--r--
📄 NDBM_File.pm	3.01 KB	04/03/2024 02:35:12 PM	rw-r--r--
📄 O.pm	4.19 KB	04/03/2024 02:35:12 PM	rw-r--r--
📄 POSIX.pm	19.87 KB	04/03/2024 02:35:12 PM	rw-r--r--
📄 POSIX.pod	78.81 KB	04/03/2024 02:35:12 PM	rw-r--r--
📁 PerlIO	-	08/27/2024 05:20:51 PM	rwxr-xr-x
📄 SDBM_File.pm	3.72 KB	04/03/2024 02:35:12 PM	rw-r--r--
📁 Sys	-	08/27/2024 05:22:04 PM	rwxr-xr-x
📄 attributes.pm	15.97 KB	04/03/2024 02:35:12 PM	rw-r--r--
📁 auto	-	04/03/2024 02:35:39 PM	rwxr-xr-x
📄 lib.pm	5.99 KB	04/03/2024 02:35:12 PM	rw-r--r--
📄 mro.pm	9.66 KB	04/03/2024 02:35:12 PM	rw-r--r--
📄 re.pm	24.8 KB	04/03/2024 02:35:12 PM	rw-r--r--
📁 vendor_perl	-	08/27/2024 07:00:40 PM	rwxr-xr-x

Editing: NDBM_File.pm

package NDBM_File;

use strict;
use warnings;

require Tie::Hash;
require XSLoader;

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

XSLoader::load();

__END__

=head1 NAME

NDBM_File - Tied access to ndbm files

=head1 SYNOPSIS

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

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

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

untie %h;

=head1 DESCRIPTION

C<NDBM_File> establishes a connection between a Perl hash variable and
a file in NDBM_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.

Use C<NDBM_File> with the Perl built-in C<tie> function to establish
the connection between the variable and the file.  The arguments to
C<tie> should be:

=over 4

=item 1.

The hash variable you want to tie.

=item 2.

The string C<"NDBM_File">.  (Ths tells Perl to use the C<NDBM_File>
package to perform the functions of the hash.)

=item 3.

The name of the file you want to tie to the hash.

=item 4.

Flags.  Use one of:

=over 2

=item C<O_RDONLY>

Read-only access to the data in the file.

=item C<O_WRONLY>

Write-only access to the data in the file.

=item C<O_RDWR>

Both read and write access.

=back

If you want to create the file if it does not exist, add C<O_CREAT> to
any of these, as in the example.  If you omit C<O_CREAT> and the file
does not already exist, the C<tie> call will fail.

=item 5.

The default permissions to use if a new file is created.  The actual
permissions will be modified by the user's umask, so you should
probably use 0666 here. (See L<perlfunc/umask>.)

=back

=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<ndbm 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 AND PORTABILITY

B<Do not accept NDBM files from untrusted sources.>

On modern Linux systems these are typically GDBM files, which are not
portable across platforms.

The GDBM documentation doesn't imply that files from untrusted sources
can be safely used with C<libgdbm>.

Systems that don't use GDBM compatibilty for ndbm support will be
using a platform specific library, possibly inherited from BSD
systems, where it may or may not be safe to use an untrusted file.

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 NDBM 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