04-08-2006
Sorry Tancy for I couldn't get u in my first reply. Since u had put this in Shell Q & A I mistook it for a question on shell. Anyway I can still help u a bit.
As I told u earlier the path of the command is stored in environment variable PATH. Now u have got two options to choose from either let Unix do the searching for u or u do it urself. If u use execlp or execvp Unix will do it for u.
But if u have decided to do the hard work urself I'll suggest u visit this link
http://linuxgazette.net/111/ramankutty.html it shall clear all ur doubts.
Regards
Rakesh
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LEARN ABOUT DEBIAN
path::dispatcher::rule::under
Path::Dispatcher::Rule::Under(3pm) User Contributed Perl Documentation Path::Dispatcher::Rule::Under(3pm)
NAME
Path::Dispatcher::Rule::Under - rules under a predicate
SYNOPSIS
my $ticket = Path::Dispatcher::Rule::Tokens->new(
tokens => [ 'ticket' ],
prefix => 1,
);
my $create = Path::Dispatcher::Rule::Tokens->new(
tokens => [ 'create' ],
block => sub { create_ticket() },
);
my $delete = Path::Dispatcher::Rule::Tokens->new(
tokens => [ 'delete', qr/^d+$/ ],
block => sub { delete_ticket(shift->pos(2)) },
);
my $rule = Path::Dispatcher::Rule::Under->new(
predicate => $ticket,
rules => [ $create, $delete ],
);
$rule->match("ticket create");
$rule->match("ticket delete 3");
DESCRIPTION
Rules of this class have two-phase matching: if the predicate is matched, then the contained rules are matched. The benefit of this is less
repetition of the predicate, both in terms of code and in matching it.
ATTRIBUTES
predicate
A rule (which must match prefixes) whose match determines whether the contained rules are considered. The leftover path of the predicate is
used as the path for the contained rules.
rules
A list of rules that will be try to be matched only if the predicate is matched.
perl v5.12.4 2011-08-30 Path::Dispatcher::Rule::Under(3pm)