01-10-2011
PERL draws input from the keyboard, a file, or a library references in a file, but it is all pretty much the same to PERL. Whatever PERL commands you want to run, that code can all be sent down the pipe as keyboard input to a remote PERL invocation, or you can send files down the pipe to /tmp and get PERL to take input from them. If you are using PERL libraries, it is a bit messy figuring how to turn them into one stream, and they may call additional libraries. Maybe PERL has a facility like CC -E or cpp, where all the includes are turned into one file.
Of course, it what you want to achieve on the far end an be reduced to the minimum, it makes it simpler. You can solicit a flow of data from the remote system using a few commands to a simple shell or PERL invocation there, and process it on the original system in the driving PERL script there. It is a classic choice of function shipping or data shipping. If there is too much remote data, then function shipping makes sense.
The perl expect script is just a media in place of something more script friendly like rcp/scp/scp2rsh/ssh/ssh2 passwordless access. What it runs on the far end is a completely divorced discussion, as well as what it feeds locally. There is not normally any expectation that a PERL expect script calls PERL modules. Trying to achieve more than access may just complicate the expect function. Usually, it is better to write something else to run locally and remotely to solve the problem, and the perl expect is just a building block to get the remote access necessary for the other local and remote code to solve the problem.
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LEARN ABOUT CENTOS
ppi::token::prototype
PPI::Token::Prototype(3) User Contributed Perl Documentation PPI::Token::Prototype(3)
NAME
PPI::Token::Prototype - A subroutine prototype descriptor
INHERITANCE
PPI::Token::End
isa PPI::Token
isa PPI::Element
SYNOPSIS
sub ($@) prototype;
DESCRIPTION
Although it sort of looks like a list or condition, a subroutine prototype is a lot more like a string. Its job is to provide hints to the
perl compiler on what type of arguments a particular subroutine expects, which the compiler uses to validate parameters at compile-time,
and allows programmers to use the functions without explicit parameter braces.
Due to the rise of OO Perl coding, which ignores these prototypes, they are most often used to allow for constant-like things, and to
"extend" the language and create things that act like keywords and core functions.
# Create something that acts like a constant
sub MYCONSTANT () { 10 }
# Create the "any" core-looking function
sub any (&@) { ... }
if ( any { $_->cute } @babies ) {
...
}
METHODS
This class provides one additional method beyond those defined by the PPI::Token and PPI::Element parent classes.
prototype
The "prototype" accessor returns the actual prototype pattern, stripped of braces and any whitespace inside the pattern.
SUPPORT
See the support section in the main module.
AUTHOR
Adam Kennedy <adamk@cpan.org>
COPYRIGHT
Copyright 2001 - 2011 Adam Kennedy.
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
The full text of the license can be found in the LICENSE file included with this module.
perl v5.16.3 2011-02-26 PPI::Token::Prototype(3)