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IO::Pipe - supply object methods for pipes

NAME

IO::Pipe - supply object methods for pipes

SYNOPSIS

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use IO::Pipe;
 
$pipe = IO::Pipe->new();
 
if($pid = fork()) { # Parent
    $pipe->reader();
 
    while(<$pipe>) {
    ...
    }
 
}
elsif(defined $pid) { # Child
    $pipe->writer();
 
    print $pipe ...
}
 
or
 
$pipe = IO::Pipe->new();
 
$pipe->reader(qw(ls -l));
 
while(<$pipe>) {
    ...
}

DESCRIPTION

IO::Pipe provides an interface to creating pipes between processes.

CONSTRUCTOR

  • new ( [READER, WRITER] )

    Creates an IO::Pipe , which is a reference to a newly created symbol (see the Symbol package). IO::Pipe::new optionally takes two arguments, which should be objects blessed into IO::Handle , or a subclass thereof. These two objects will be used for the system call to pipe. If no arguments are given then method handles is called on the new IO::Pipe object.

    These two handles are held in the array part of the GLOB until either reader or writer is called.

METHODS

  • reader ([ARGS])

    The object is re-blessed into a sub-class of IO::Handle , and becomes a handle at the reading end of the pipe. If ARGS are given then fork is called and ARGS are passed to exec.

  • writer ([ARGS])

    The object is re-blessed into a sub-class of IO::Handle , and becomes a handle at the writing end of the pipe. If ARGS are given then fork is called and ARGS are passed to exec.

  • handles ()

    This method is called during construction by IO::Pipe::new on the newly created IO::Pipe object. It returns an array of two objects blessed into IO::Pipe::End , or a subclass thereof.

SEE ALSO

IO::Handle

AUTHOR

Graham Barr. Currently maintained by the Perl Porters. Please report all bugs to <perlbug@perl.org>.

COPYRIGHT

Copyright (c) 1996-8 Graham Barr <gbarr@pobox.com>. All rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

doc_perl
doc_perl
2025-01-10 15:47:30
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