Add configurable login banners.

1 files changed, 130 insertions, 0 deletions

diff --git a/scripts/vyatta-banner.pl b/scripts/vyatta-banner.pl
new file mode 100644
index 00000000..5daeb482
--- /dev/null
+++ b/scripts/vyatta-banner.pl
@@ -0,0 +1,130 @@
+#!/usr/bin/perl
+#
+# **** 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.
+#
+# A copy of the GNU General Public License is available as
+# `/usr/share/common-licenses/GPL' in the Debian GNU/Linux distribution
+# or on the World Wide Web at `http://www.gnu.org/copyleft/gpl.html'.
+# You can also obtain it by writing to the Free Software Foundation,
+# Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
+# MA 02110-1301, USA.
+#
+# This code was originally developed by Vyatta, Inc.
+# Portions created by Vyatta are Copyright (C) 2009 Vyatta, Inc.
+# All Rights Reserved.
+#
+# Author: Stig Thormodsrud
+# Date: April 2009
+# Description: Script to setup login banner
+#
+# **** End License ****
+#
+
+use lib '/opt/vyatta/share/perl5/';
+use Vyatta::Config;
+
+use Getopt::Long;
+use strict;
+use warnings;
+
+my $prelogin_file      = '/etc/issue';
+my $prelogin_net_file  = '/etc/issue.net';
+my $postlogin_file     = '/etc/motd';
+
+
+sub save_orig_file {
+    my $file = shift;
+
+    system "mv $file $file.old" if ! -e "$file.old";
+    return;
+}
+
+sub restore_orig_file {
+    my $file = shift;
+
+    system "mv $file.old $file" if -e "$file.old";
+    return;
+}
+
+sub write_file_value {
+    my ($file, $value) = @_;
+
+    open my $F, '>', $file or die "Error: opening $file [$!]";
+    print $F "$value";
+    close $F;
+}
+
+sub get_banner {
+    my $banner_type = shift;
+
+    my $config = new Vyatta::Config;
+    $config->setLevel('system login banner');
+    my $text = $config->returnValue($banner_type);
+    $text =~ s|\\n|\n|g;
+    $text =~ s|\\t|\t|g;
+    return $text;
+}
+
+sub add_prelogin {
+    save_orig_file($prelogin_file);
+    save_orig_file($prelogin_net_file);
+    my $text = get_banner('pre-login');
+    write_file_value($prelogin_file, $text);    
+    write_file_value($prelogin_net_file, $text);    
+    return;
+}
+
+sub add_postlogin {
+    save_orig_file($postlogin_file);
+    my $text = get_banner('post-login');
+    write_file_value($postlogin_file, $text);
+    return;
+}
+
+
+#
+# main
+#
+my ($action, $banner_type);
+
+GetOptions("action=s"      => \$action,
+	   "banner-type=s" => \$banner_type,
+);
+
+die "Error: no action"      if ! defined $action;
+die "Error: no banner-type" if ! defined $banner_type;
+
+if ($action eq 'update') {
+    if ($banner_type eq 'pre-login') {
+	add_prelogin();
+	exit 0;
+    }
+    if ($banner_type eq 'post-login') {
+	add_postlogin();
+	exit 0;
+    }
+}
+
+if ($action eq 'delete') {
+    if ($banner_type eq 'pre-login') {
+	restore_orig_file($prelogin_file);
+	restore_orig_file($prelogin_net_file);
+	exit 0;
+    }
+    if ($banner_type eq 'post-login') {
+	restore_orig_file($postlogin_file);
+	exit 0;
+    }
+}
+
+exit 1;
+
+#end of file