CONTENTS

Pragmatic Modules

They work somewhat like compiler directives (pragmata) in that they tend to affect the compilation of your program, and thus will usually work well only when used within a use, or no. Most of these are lexically scoped, so an inner BLOCK may countermand them by saying:

no integer;
no strict 'refs';
no warnings;

which lasts until the end of that BLOCK.

Some pragmas are lexically scoped--typically those that affect the $^H hints variable. Others affect the current package instead, like use vars and use subs, which allow you to predeclare a variables or subroutines within a particular file rather than just a block. Such declarations are effective for the entire file for which they were declared. You cannot rescind them with no vars or no subs.

The following pragmas are defined (and have their own documentation).

attributes

Get/set subroutine or variable attributes

attrs

Set/get attributes of a subroutine (deprecated)

autouse

Postpone load of modules until a function is used

base

Establish IS-A relationship with base class at compile time

blib

Use MakeMaker's uninstalled version of a package

bytes

Force byte semantics rather than character semantics

charnames

Define character names for \N{named} string literal escape.

constant

Declare constants

diagnostics

Perl compiler pragma to force verbose warning diagnostics

fields

Compile-time class fields

filetest

Control the filetest permission operators

if

use a Perl module if a condition holds

integer

Use integer arithmetic instead of floating point

less

Request less of something from the compiler

lib

Manipulate @INC at compile time

lib

Manipulate @INC at compile time

locale

Use and avoid POSIX locales for built-in operations

open

Set default disciplines for input and output

ops

Restrict unsafe operations when compiling

overload

Package for overloading perl operations

re

Alter regular expression behaviour

sigtrap

Enable simple signal handling

strict

Restrict unsafe constructs

subs

Predeclare sub names

utf8

Enable/disable UTF-8 in source code

vars

Predeclare global variable names (obsolete)

warnings

Control optional warnings

warnings::register

Warnings import function

Standard Modules

Standard, bundled modules are all expected to behave in a well-defined manner with respect to namespace pollution because they use the Exporter module. See their own documentation for details.

It's possible that not all modules listed below are installed on your system. For example, the GDBM_File module will not be installed if you don't have the gdbm library.

AnyDBM_File

Provide framework for multiple DBMs

AutoLoader

Load subroutines only on demand

AutoSplit

Split a package for autoloading

B

The Perl Compiler

B::Asmdata

Autogenerated data about Perl ops, used to generate bytecode

B::Assembler

Assemble Perl bytecode

B::Bblock

Walk basic blocks

B::Bytecode

Perl compiler's bytecode backend

B::C

Perl compiler's C backend

B::CC

Perl compiler's optimized C translation backend

B::Concise

Walk Perl syntax tree, printing concise info about ops

B::Debug

Walk Perl syntax tree, printing debug info about ops

B::Deparse

Perl compiler backend to produce perl code

B::Disassembler

Disassemble Perl bytecode

B::Lint

Perl lint

B::Showlex

Show lexical variables used in functions or files

B::Stackobj

Helper module for CC backend

B::Stash

Show what stashes are loaded

B::Terse

Walk Perl syntax tree, printing terse info about ops

B::Xref

Generates cross reference reports for Perl programs

Benchmark

Benchmark running times of Perl code

ByteLoader

Load byte compiled perl code

CGI

Simple Common Gateway Interface Class

CGI::Apache

Backward compatibility module for CGI.pm

CGI::Carp

CGI routines for writing to the HTTPD (or other) error log

CGI::Cookie

Interface to Netscape Cookies

CGI::Fast

CGI Interface for Fast CGI

CGI::Pretty

Module to produce nicely formatted HTML code

CGI::Push

Simple Interface to Server Push

CGI::Switch

Backward compatibility module for defunct CGI::Switch

CGI::Util

Internal utilities used by CGI module

CPAN

Query, download and build perl modules from CPAN sites

CPAN::FirstTime

Utility for CPAN::Config file Initialization

CPAN::Nox

Wrapper around CPAN.pm without using any XS module

Carp

Warn of errors (from perspective of caller)

Carp::Heavy

Carp guts

Class::Struct

Declare struct-like datatypes as Perl classes

Config

Access Perl configuration information

Cwd

Get pathname of current working directory

DB

Programmatic interface to the Perl debugging API (draft, subject to

DB_File

Perl5 access to Berkeley DB version 1.x

Data::Dumper

Stringified perl data structures, suitable for both printing and eval

Devel::DProf

A Perl code profiler

Devel::Peek

A data debugging tool for the XS programmer

Devel::SelfStubber

Generate stubs for a SelfLoading module

DirHandle

Supply object methods for directory handles

Dumpvalue

Provides screen dump of Perl data.

DynaLoader

Dynamically load C libraries into Perl code

English

Use nice English (or awk) names for ugly punctuation variables

Env

Perl module that imports environment variables as scalars or arrays

Errno

System errno constants

Exporter

Implements default import method for modules

Exporter::Heavy

Exporter guts

ExtUtils::Command

Utilities to replace common UNIX commands in Makefiles etc.

ExtUtils::Command::MM

Commands for the MM's to use in Makefiles

ExtUtils::Embed

Utilities for embedding Perl in C/C++ applications

ExtUtils::Install

Install files from here to there

ExtUtils::Installed

Inventory management of installed modules

ExtUtils::Liblist

Determine libraries to use and how to use them

ExtUtils::MM

OS adjusted ExtUtils::MakeMaker subclass

ExtUtils::MM_Any

Platform-agnostic MM methods

ExtUtils::MM_BeOS

Methods to override UN*X behaviour in ExtUtils::MakeMaker

ExtUtils::MM_Cygwin

Methods to override UN*X behaviour in ExtUtils::MakeMaker

ExtUtils::MM_DOS

DOS specific subclass of ExtUtils::MM_Unix

ExtUtils::MM_MacOS

Methods to override UN*X behaviour in ExtUtils::MakeMaker

ExtUtils::MM_NW5

Methods to override UN*X behaviour in ExtUtils::MakeMaker

ExtUtils::MM_OS2

Methods to override UN*X behaviour in ExtUtils::MakeMaker

ExtUtils::MM_UWIN

U/WIN specific subclass of ExtUtils::MM_Unix

ExtUtils::MM_Unix

Methods used by ExtUtils::MakeMaker

ExtUtils::MM_VMS

Methods to override UN*X behaviour in ExtUtils::MakeMaker

ExtUtils::MM_Win32

Methods to override UN*X behaviour in ExtUtils::MakeMaker

ExtUtils::MM_Win95

Method to customize MakeMaker for Win9X

ExtUtils::MY

ExtUtils::MakeMaker subclass for customization

ExtUtils::MakeMaker

Create a module Makefile

ExtUtils::MakeMaker::FAQ

Frequently Asked Questions About MakeMaker

ExtUtils::MakeMaker::Tutorial

Writing a module with MakeMaker

ExtUtils::MakeMaker::bytes

Version-agnostic bytes.pm

ExtUtils::MakeMaker::vmsish

Platform-agnostic vmsish.pm

ExtUtils::Manifest

Utilities to write and check a MANIFEST file

ExtUtils::Mkbootstrap

Make a bootstrap file for use by DynaLoader

ExtUtils::Mksymlists

Write linker options files for dynamic extension

ExtUtils::Packlist

Manage .packlist files

ExtUtils::testlib

Add blib/* directories to @INC

Fatal

Replace functions with equivalents which succeed or die

Fcntl

Load the C Fcntl.h defines

File::Basename

Split a pathname into pieces

File::CheckTree

Run many filetest checks on a tree

File::Compare

Compare files or filehandles

File::Copy

Copy files or filehandles

File::DosGlob

DOS like globbing and then some

File::Find

Traverse a file tree

File::Glob

Perl extension for BSD glob routine

File::Path

Create or remove directory trees

File::Spec

Portably perform operations on file names

File::Spec::Cygwin

Methods for Cygwin file specs

File::Spec::Epoc

Methods for Epoc file specs

File::Spec::Functions

Portably perform operations on file names

File::Spec::Mac

File::Spec for Mac OS (Classic)

File::Spec::OS2

Methods for OS/2 file specs

File::Spec::Unix

File::Spec for Unix, base for other File::Spec modules

File::Spec::VMS

Methods for VMS file specs

File::Spec::Win32

Methods for Win32 file specs

File::Temp

Return name and handle of a temporary file safely

File::stat

By-name interface to Perl's built-in stat() functions

FileCache

Keep more files open than the system permits

FileHandle

Supply object methods for filehandles

FindBin

Locate directory of original perl script

GDBM_File

Perl5 access to the gdbm library.

Getopt::Long

Extended processing of command line options

Getopt::Std

Process single-character switches with switch clustering

I18N::Collate

Compare 8-bit scalar data according to the current locale

IO

Load various IO modules

IO::Dir

Supply object methods for directory handles

IO::File

Supply object methods for filehandles

IO::Handle

Supply object methods for I/O handles

IO::Pipe

Supply object methods for pipes

IO::Poll

Object interface to system poll call

IO::Seekable

Supply seek based methods for I/O objects

IO::Select

OO interface to the select system call

IO::Socket

Object interface to socket communications

IO::Socket::INET

Object interface for AF_INET domain sockets

IO::Socket::UNIX

Object interface for AF_UNIX domain sockets

IPC::Open2

Open a process for both reading and writing

IPC::Open3

Open a process for reading, writing, and error handling

IPC::SysV

SysV IPC constants

IPC::SysV::Msg

SysV Msg IPC object class

IPC::SysV::Semaphore

SysV Semaphore IPC object class

Math::BigFloat

Arbitrary length float math package

Math::BigInt

Arbitrary size integer math package

Math::Complex

Complex numbers and associated mathematical functions

Math::Trig

Trigonometric functions

NDBM_File

Tied access to ndbm files

Net::Ping

Check a remote host for reachability

Net::hostent

By-name interface to Perl's built-in gethost*() functions

Net::netent

By-name interface to Perl's built-in getnet*() functions

Net::protoent

By-name interface to Perl's built-in getproto*() functions

Net::servent

By-name interface to Perl's built-in getserv*() functions

O

Generic interface to Perl Compiler backends

ODBM_File

Tied access to odbm files

Opcode

Disable named opcodes when compiling perl code

POSIX

Perl interface to IEEE Std 1003.1

Pod::Checker

Check pod documents for syntax errors

Pod::Find

Find POD documents in directory trees

Pod::Html

Module to convert pod files to HTML

Pod::InputObjects

Objects representing POD input paragraphs, commands, etc.

Pod::LaTeX

Convert Pod data to formatted Latex

Pod::Man

Convert POD data to formatted *roff input

Pod::ParseUtils

Helpers for POD parsing and conversion

Pod::Parser

Base class for creating POD filters and translators

Pod::Plainer

Perl extension for converting Pod to old style Pod.

Pod::Select

Extract selected sections of POD from input

Pod::Text

Convert POD data to formatted ASCII text

Pod::Text::Color

Convert POD data to formatted color ASCII text

Pod::Text::Overstrike

Convert POD data to formatted overstrike text

Pod::Text::Termcap

Convert POD data to ASCII text with format escapes

Pod::Usage

Print a usage message from embedded pod documentation

SDBM_File

Tied access to sdbm files

Safe

Compile and execute code in restricted compartments

Search::Dict

Search for key in dictionary file

SelectSaver

Save and restore selected file handle

SelfLoader

Load functions only on demand

Shell

Run shell commands transparently within perl

Socket

Load the C socket.h defines and structure manipulators

Symbol

Manipulate Perl symbols and their names

Sys::Hostname

Try every conceivable way to get hostname

Sys::Syslog

Perl interface to the UNIX syslog(3) calls

Term::ANSIColor

Color screen output using ANSI escape sequences

Term::Cap

Perl termcap interface

Term::Complete

Perl word completion module

Term::ReadLine

Perl interface to various readline packages. If

Test

Provides a simple framework for writing test scripts

Test::Builder

Backend for building test libraries

Test::Harness

Run perl standard test scripts with statistics

Test::Harness::Assert

Simple assert

Test::Harness::Iterator

Internal Test::Harness Iterator

Test::Harness::Straps

Detailed analysis of test results

Test::More

Yet another framework for writing test scripts

Test::Simple

Basic utilities for writing tests.

Test::Tutorial

A tutorial about writing really basic tests

Text::Abbrev

Create an abbreviation table from a list

Text::ParseWords

Parse text into an array of tokens or array of arrays

Text::Soundex

Implementation of the Soundex Algorithm as Described by Knuth

Text::Tabs

Expand and unexpand tabs per the unix expand(1) and unexpand(1)

Text::Wrap

Line wrapping to form simple paragraphs

Thread

Manipulate threads in Perl (EXPERIMENTAL, subject to change)

Thread::Queue

Thread-safe queues

Thread::Semaphore

Thread-safe semaphores

Thread::Signal

Start a thread which runs signal handlers reliably

Thread::Specific

Thread-specific keys

Tie::Array

Base class for tied arrays

Tie::Handle

Base class definitions for tied handles

Tie::Hash

Base class definitions for tied hashes

Tie::RefHash

Use references as hash keys

Tie::Scalar

Base class definitions for tied scalars

Tie::SubstrHash

Fixed-table-size, fixed-key-length hashing

Time::Local

Efficiently compute time from local and GMT time

Time::gmtime

By-name interface to Perl's built-in gmtime() function

Time::localtime

By-name interface to Perl's built-in localtime() function

Time::tm

Internal object used by Time::gmtime and Time::localtime

UNIVERSAL

Base class for ALL classes (blessed references)

User::grent

By-name interface to Perl's built-in getgr*() functions

User::pwent

By-name interface to Perl's built-in getpw*() functions

Win32

Interfaces to some Win32 API Functions

XSLoader

Dynamically load C libraries into Perl code