Tie::Handle - Online Linux Manual PageSection : 3pm
Updated : 2022-03-15
Source : perl v5.34.1
Note : Perl Programmers Reference Guide
NAMETie::Handle − base class definitions for tied handles
SYNOPSIS package NewHandle;
require Tie::Handle;
@ISA = qw(Tie::Handle);
sub READ { ... } # Provide a needed method
sub TIEHANDLE { ... } # Overrides inherited method
package main;
tie *FH, 'NewHandle';
DESCRIPTIONThis module provides some skeletal methods for handle-tying classes. See perltie for a list of the functions required in tying a handle to a package. The basic Tie::Handle package provides a new method, as well as methods TIEHANDLE, PRINT, PRINTF and GETC. For developers wishing to write their own tied-handle classes, the methods are summarized below. The perltie section not only documents these, but has sample code as well: TIEHANDLE classname, LIST The method invoked by the command tie *glob, classname. Associates a new glob instance with the specified class. LIST would represent additional arguments (along the lines of AnyDBM_File and compatriots) needed to complete the association. WRITE this, scalar, length, offset Write length bytes of data from scalar starting at offset. PRINT this, LIST Print the values in LIST PRINTF this, format, LIST Print the values in LIST using format READ this, scalar, length, offset Read length bytes of data into scalar starting at offset. READLINE this Read a single line GETC this Get a single character CLOSE this Close the handle OPEN this, filename (Re−)open the handle BINMODE this Specify content is binary EOF this Test for end of file. TELL this Return position in the file. SEEK this, offset, whence Position the file. Test for end of file. DESTROY this Free the storage associated with the tied handle referenced by this. This is rarely needed, as Perl manages its memory quite well. But the option exists, should a class wish to perform specific actions upon the destruction of an instance.
MORE INFORMATIONThe perltie section contains an example of tying handles.
COMPATIBILITYThis version of Tie::Handle is neither related to nor compatible with the Tie::Handle (3.0) module available on CPAN. It was due to an accident that two modules with the same name appeared. The namespace clash has been cleared in favor of this module that comes with the perl core in September 2000 and accordingly the version number has been bumped up to 4.0. 0
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