Gecko [ paxlifestyle.com ]

Name	Size	Permission	Date
Attribute	[ DIR ]	drwxr-xr-x	2026-03-12 15:08
B	[ DIR ]	drwxr-xr-x	2026-03-12 15:08
CPAN	[ DIR ]	drwxr-xr-x	2026-03-12 15:14
Class	[ DIR ]	drwxr-xr-x	2026-03-12 15:08
Compress	[ DIR ]	drwxr-xr-x	2026-03-12 15:08
Config	[ DIR ]	drwxr-xr-x	2026-03-12 15:08
DBM_Filter	[ DIR ]	drwxr-xr-x	2026-03-12 15:08
Devel	[ DIR ]	drwxr-xr-x	2026-03-12 15:08
ExtUtils	[ DIR ]	drwxr-xr-x	2026-03-12 15:08
File	[ DIR ]	drwxr-xr-x	2026-03-12 15:08
Getopt	[ DIR ]	drwxr-xr-x	2026-03-12 15:08
I18N	[ DIR ]	drwxr-xr-x	2026-03-12 15:08
IO	[ DIR ]	drwxr-xr-x	2026-03-12 15:08
IPC	[ DIR ]	drwxr-xr-x	2026-03-12 15:08
Locale	[ DIR ]	drwxr-xr-x	2026-03-12 15:08
Math	[ DIR ]	drwxr-xr-x	2026-03-12 15:08
Memoize	[ DIR ]	drwxr-xr-x	2026-03-12 15:08
Module	[ DIR ]	drwxr-xr-x	2026-03-12 15:08
Net	[ DIR ]	drwxr-xr-x	2026-03-12 15:08
PerlIO	[ DIR ]	drwxr-xr-x	2026-03-12 15:08
Pod	[ DIR ]	drwxr-xr-x	2026-03-12 15:08
Search	[ DIR ]	drwxr-xr-x	2026-03-12 15:08
Term	[ DIR ]	drwxr-xr-x	2026-03-12 15:08
Text	[ DIR ]	drwxr-xr-x	2026-03-12 15:08
Thread	[ DIR ]	drwxr-xr-x	2026-03-12 15:08
Tie	[ DIR ]	drwxr-xr-x	2026-03-12 15:08
Time	[ DIR ]	drwxr-xr-x	2026-03-12 15:08
URI	[ DIR ]	drwxr-xr-x	2026-03-12 15:08
Unicode	[ DIR ]	drwxr-xr-x	2026-03-12 15:08
User	[ DIR ]	drwxr-xr-x	2026-03-12 15:08
encoding	[ DIR ]	drwxr-xr-x	2026-03-12 15:08
overload	[ DIR ]	drwxr-xr-x	2026-03-12 15:08
pod	[ DIR ]	drwxr-xr-x	2026-03-12 15:08
unicore	[ DIR ]	drwxr-xr-x	2026-03-12 15:08
vendor_perl	[ DIR ]	drwxr-xr-x	2026-05-27 07:00
warnings	[ DIR ]	drwxr-xr-x	2026-03-12 15:08
AnyDBM_File.pm	2.56 KB	-rw-r--r--	2025-07-10 00:00
AutoLoader.pm	15.43 KB	-rw-r--r--	2025-07-10 00:00
AutoSplit.pm	19.18 KB	-rw-r--r--	2025-07-10 00:00
Benchmark.pm	30.3 KB	-rw-r--r--	2025-07-10 00:00
CORE.pod	3.11 KB	-rw-r--r--	2025-07-10 00:00
DB.pm	18.48 KB	-rw-r--r--	2025-07-10 00:00
DBM_Filter.pm	14.05 KB	-rw-r--r--	2025-07-10 00:00
DirHandle.pm	2.04 KB	-rw-r--r--	2025-07-10 00:00
Dumpvalue.pm	17.25 KB	-rw-r--r--	2025-07-10 00:00
English.pm	4.65 KB	-rw-r--r--	2025-07-10 00:00
FileCache.pm	5.42 KB	-rw-r--r--	2025-07-10 00:00
FileHandle.pm	6.65 KB	-rw-r--r--	2025-07-10 00:00
FindBin.pm	4.69 KB	-rw-r--r--	2025-07-10 00:00
Internals.pod	2.87 KB	-rw-r--r--	2025-07-10 00:00
Memoize.pm	31.82 KB	-rw-r--r--	2025-07-10 00:00
NEXT.pm	18.54 KB	-rw-r--r--	2025-07-10 00:00
PerlIO.pm	13.92 KB	-rw-r--r--	2025-07-10 00:00
Safe.pm	24.8 KB	-rw-r--r--	2025-07-10 00:00
SelectSaver.pm	1.05 KB	-rw-r--r--	2025-07-10 00:00
SelfLoader.pm	17.27 KB	-rw-r--r--	2025-07-10 00:00
Symbol.pm	4.79 KB	-rw-r--r--	2025-07-10 00:00
Test.pm	29.34 KB	-rw-r--r--	2025-07-10 00:00
Thread.pm	8.09 KB	-rw-r--r--	2025-07-10 00:00
UNIVERSAL.pm	6.31 KB	-rw-r--r--	2025-07-10 00:00
URI.pm	40.66 KB	-rw-r--r--	2024-02-09 15:01
XSLoader.pm	11.13 KB	-rw-r--r--	2025-07-10 00:00
_charnames.pm	34.84 KB	-rw-r--r--	2025-07-10 00:00
autouse.pm	4.14 KB	-rw-r--r--	2025-07-10 00:00
base.pm	10.7 KB	-rw-r--r--	2025-07-10 00:00
blib.pm	2.01 KB	-rw-r--r--	2025-07-10 00:00
builtin.pm	12.86 KB	-rw-r--r--	2025-07-10 00:00
bytes.pm	3.77 KB	-rw-r--r--	2025-07-10 00:00
charnames.pm	20.56 KB	-rw-r--r--	2025-07-10 00:00
deprecate.pm	4.5 KB	-rw-r--r--	2025-07-10 00:00
diagnostics.pm	18.89 KB	-rw-r--r--	2025-07-10 00:00
dumpvar.pl	15.19 KB	-rw-r--r--	2025-07-10 00:00
feature.pm	30.29 KB	-rw-r--r--	2025-07-10 00:00
fields.pm	9.24 KB	-rw-r--r--	2025-07-10 00:00
filetest.pm	3.91 KB	-rw-r--r--	2025-07-10 00:00
if.pm	3.55 KB	-rw-r--r--	2025-07-10 00:00
integer.pm	3.18 KB	-rw-r--r--	2025-07-10 00:00
less.pm	3.13 KB	-rw-r--r--	2025-07-10 00:00
locale.pm	5.03 KB	-rw-r--r--	2025-07-10 00:00
meta_notation.pm	2.02 KB	-rw-r--r--	2025-07-10 00:00
open.pm	8.3 KB	-rw-r--r--	2025-07-10 00:00
overload.pm	53.44 KB	-rw-r--r--	2025-07-10 00:00
overloading.pm	1.77 KB	-rw-r--r--	2025-07-10 00:00
perl5db.pl	310.19 KB	-rw-r--r--	2025-07-10 00:00
sigtrap.pm	8.53 KB	-rw-r--r--	2025-07-10 00:00
sort.pm	2.92 KB	-rw-r--r--	2025-07-10 00:00
strict.pm	5.03 KB	-rw-r--r--	2025-07-10 00:00
subs.pm	945 B	-rw-r--r--	2025-07-10 00:00
utf8.pm	10.63 KB	-rw-r--r--	2025-07-10 00:00
vars.pm	2.4 KB	-rw-r--r--	2025-07-10 00:00
vmsish.pm	4.21 KB	-rw-r--r--	2025-07-10 00:00
warnings.pm	56.44 KB	-rw-r--r--	2025-07-10 00:00

Rename

package AnyDBM_File;
use warnings;
use strict;

use 5.006_001;
our $VERSION = '1.01';
our @ISA = qw(NDBM_File DB_File GDBM_File SDBM_File ODBM_File) unless @ISA;

my $mod;
for $mod (@ISA) {
    if (eval "require $mod") {
	@ISA = ($mod);	# if we leave @ISA alone, warnings abound
	return 1;
    }
}

die "No DBM package was successfully found or installed";

__END__

=head1 NAME

AnyDBM_File - provide framework for multiple DBMs

NDBM_File, DB_File, GDBM_File, SDBM_File, ODBM_File - various DBM implementations

=head1 SYNOPSIS

use AnyDBM_File;

=head1 DESCRIPTION

This module is a "pure virtual base class"--it has nothing of its own.
It's just there to inherit from one of the various DBM packages.  It
prefers ndbm for compatibility reasons with Perl 4, then Berkeley DB (See
L<DB_File>), GDBM, SDBM (which is always there--it comes with Perl), and
finally ODBM.   This way old programs that used to use NDBM via dbmopen()
can still do so, but new ones can reorder @ISA:

BEGIN { @AnyDBM_File::ISA = qw(DB_File GDBM_File NDBM_File) }
    use AnyDBM_File;

Having multiple DBM implementations makes it trivial to copy database formats:

use Fcntl; use NDBM_File; use DB_File;
    tie %newhash,  'DB_File', $new_filename, O_CREAT|O_RDWR;
    tie %oldhash,  'NDBM_File', $old_filename, 1, 0;
    %newhash = %oldhash;

=head2 DBM Comparisons

Here's a partial table of features the different packages offer:

odbm    ndbm    sdbm    gdbm    bsd-db
			 ----	 ----    ----    ----    ------
 Linkage comes w/ perl   yes     yes     yes     yes     yes
 Src comes w/ perl       no      no      yes     no      no
 Comes w/ many unix os   yes     yes[0]  no      no      no
 Builds ok on !unix      ?       ?       yes     yes     ?
 Code Size               ?       ?       small   big     big
 Database Size           ?       ?       small   big?    ok[1]
 Speed                   ?       ?       slow    ok      fast
 FTPable                 no      no      yes     yes     yes
 Easy to build          N/A     N/A      yes     yes     ok[2]
 Size limits             1k      4k      1k[3]   none    none
 Byte-order independent  no      no      no      no      yes
 Licensing restrictions  ?       ?       no      yes     no

=over 4

=item [0]

on mixed universe machines, may be in the bsd compat library,
which is often shunned.

=item [1]

Can be trimmed if you compile for one access method.

=item [2]

See L<DB_File>. 
Requires symbolic links.

=item [3]

By default, but can be redefined.

=back

=head1 SEE ALSO

dbm(3), ndbm(3), DB_File(3), L<perldbmfilter>

=cut