IO::Pipe (3)
Leading comments
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NAME
IO::Pipe - supply object methods for pipesSYNOPSIS
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
GLOBuntil 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.