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#!/usr/bin/perl
# Author: An-Cheng Huang <ancheng@vyatta.com>
# Date: 2007
# Description: bash expand script
# **** License ****
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# This code was originally developed by Vyatta, Inc.
# Portions created by Vyatta are Copyright (C) 2006, 2007, 2008 Vyatta, Inc.
# All Rights Reserved.
# **** End License ****
use strict;
use lib "/opt/vyatta/share/perl5/";
use Vyatta::Config;
# expand a variable reference
if ($#ARGV != 0) {
print STDERR "usage: vyatta-cli-expand-var.pl '<var-ref>'\n";
exit 1;
}
$_ = $ARGV[0];
# basic format check:
# '(' ')' not allowed in reference.
# only allow absolute path for now.
if (!/^\$VAR\(\/([^()]+)\)$/) {
print STDERR "invalid variable reference (invalid format)\n";
exit 1;
}
$_ = $1;
my $multi_val = 1;
if (s/^(.*)\/\@\@$/$1/) {
# return list of multi-node values
$multi_val = 1;
} elsif (s/^(.*)\/\@$/$1/) {
# return single value
$multi_val = 0;
} else {
# only allow the above 2 forms for now.
print STDERR "invalid variable reference (invalid value specification)\n";
exit 1;
}
if (/\@/) {
# '@' not allowed anywhere else in the reference for now.
print STDERR "invalid variable reference (extra value specification)\n";
exit 1;
}
my $config = new Vyatta::Config;
my $path_str = join ' ', (split /\//);
my $val_str = "";
if ($multi_val) {
my @tmp = $config->returnOrigValues($path_str);
if (scalar(@tmp) > 0) {
# we got multiple values back
$val_str = join ' ', @tmp;
} else {
# this node may be a 'tag' node. try listing children.
$config->setLevel($path_str);
@tmp = $config->listOrigNodes();
$val_str = join ' ', @tmp;
}
} else {
$val_str = $config->returnOrigValue($path_str);
}
# expanded string is printed on stdout (multiple values separated by ' ').
print "$val_str";
exit 0;
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