From 45bf2a03c98db3aeb415d4315933f238748ecb53 Mon Sep 17 00:00:00 2001
From: Stefan Schantl <stefan.schantl@ipfire.org>
Date: Mon, 23 Nov 2015 09:57:25 +0100
Subject: [PATCH] Add support for command line arguments and usage of "Config"
 module.

guardian now can be called with some additional command line arguments, like
"--config" to specify a different config file than the default one. The optoions
"--help" and "--vesion" will display some help texts and version informations on
the console. The "--foreground" option is not supported/implemented yet and will
be used to keep the process in the foreground and not fork into background at a later
time.

The "Config" module now also is used to get all settings from the config file and
store them into a hash called mainsettings for a later usage.

Signed-off-by: Stefan Schantl <stefan.schantl@ipfire.org>
---
 guardian | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/guardian b/guardian
index c0773ee..3435c09 100644
--- a/guardian
+++ b/guardian
@@ -22,17 +22,50 @@
 use strict;
 use threads;
 use threads::shared;
+use Getopt::Long;
 use Thread::Queue;
 use Linux::Inotify2;
 
+require Guardian::Config;
 require Guardian::Parser;
 require Guardian::Socket;
 
+# Define version.
+my $version ="2.0";
+
 # Array to store the monitored logfiles.
 my @monitored_files = (
 	"/var/log/snort/alert",
 );
 
+# Get and store the given command line arguments in a hash.
+my %cmdargs = ();
+
+&GetOptions (\%cmdargs,
+	'foreground|f',
+	'config|c=s',
+	'help|h',
+	'version|v',
+);
+
+# Show help / version information.
+if (defined($cmdargs{"help"})) {
+	print "Guardian $version \n";
+	print "Usage: guardian <optional arguments>\n";
+	print " -c, --config\t\tspecifiy a configuration file other than the default (/etc/guardian/guardian.conf)\n";
+	print " -f, --foreground\trun in the foreground (doesn't fork, any output goes to STDOUT)\n";
+	print " -h, --help\t\tshows this help\n";
+	print " -v, --version\t\tdisplay programm version and exit.\n";
+	exit;
+} elsif (defined($cmdargs{"version"})) {
+	print "Guardian $version \n";
+	exit;
+}
+
+# Read-in the configuration file and store the settings.
+# Push the may be given config file argument.
+my %mainsettings = &Guardian::Config::UseConfig($cmdargs{"config"});
+
 # Create the main queue. It is used to store and process all events which are
 # reported and enqueued by the worker threads.
 my $queue :shared = new Thread::Queue or die "Could not create new, empty queue. $!\n";;
-- 
2.39.2