ActiveState!

ActivePerl Documentation
Table of Contents

(Usage Statistics)
(about this ver)


* Getting Started
    * Welcome To ActivePerl
    * Release Notes
    * Readme
    * ActivePerl Change Log
* Install Notes
    * Linux
    * Solaris
    * Windows
* ActivePerl Components
    * Overview
    * PPM
    * Windows Specifics
       * OLE Browser
       * PerlScript
       * Perl for ISAPI
       * PerlEZ
* ActivePerl FAQ
    * Introduction
    * Availability & Install
    * Using PPM
    * Docs & Support
    * Windows Specifics
       * Perl for ISAPI
       * Windows 9X/NT/2000
       * Quirks
       * Web Server Config
       * Web programming
       * Programming
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       * Embedding & Extending
       * Using OLE with Perl
* Windows Scripting
    * Active Server Pages
    * Windows Script Host
    * Windows Script Components

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* XSLoader

 IO::File - supply object methods for filehandles


NAME

IO::File - supply object methods for filehandles


SUPPORTED PLATFORMS

  • Linux
  • Solaris
  • Windows

SYNOPSIS

    use IO::File;
    $fh = new IO::File;
    if ($fh->open("< file")) {
        print <$fh>;
        $fh->close;
    }
    $fh = new IO::File "> file";
    if (defined $fh) {
        print $fh "bar\n";
        $fh->close;
    }
    $fh = new IO::File "file", "r";
    if (defined $fh) {
        print <$fh>;
        undef $fh;       # automatically closes the file
    }
    $fh = new IO::File "file", O_WRONLY|O_APPEND;
    if (defined $fh) {
        print $fh "corge\n";
        $pos = $fh->getpos;
        $fh->setpos($pos);
        undef $fh;       # automatically closes the file
    }
    autoflush STDOUT 1;


DESCRIPTION

IO::File inherits from IO::Handle and IO::Seekable. It extends these classes with methods that are specific to file handles.


CONSTRUCTOR

new ( FILENAME [,MODE [,PERMS]] )
Creates a IO::File. If it receives any parameters, they are passed to the method open; if the open fails, the object is destroyed. Otherwise, it is returned to the caller.

new_tmpfile
Creates an IO::File opened for read/write on a newly created temporary file. On systems where this is possible, the temporary file is anonymous (i.e. it is unlinked after creation, but held open). If the temporary file cannot be created or opened, the IO::File object is destroyed. Otherwise, it is returned to the caller.


METHODS

open( FILENAME [,MODE [,PERMS]] )
open accepts one, two or three parameters. With one parameter, it is just a front end for the built-in open function. With two or three parameters, the first parameter is a filename that may include whitespace or other special characters, and the second parameter is the open mode, optionally followed by a file permission value.

If IO::File::open receives a Perl mode string (``>'', ``+<'', etc.) or a ANSI C fopen() mode string (``w'', ``r+'', etc.), it uses the basic Perl open operator (but protects any special characters).

If IO::File::open is given a numeric mode, it passes that mode and the optional permissions value to the Perl sysopen operator. The permissions default to 0666.

For convenience, IO::File exports the O_XXX constants from the Fcntl module, if this module is available.


SEE ALSO

the perlfunc manpage, I/O Operators in the perlop manpage, the IO::Handle manpage the IO::Seekable manpage


HISTORY

Derived from FileHandle.pm by Graham Barr <gbarr@pobox.com>.

 IO::File - supply object methods for filehandles