#!/usr/bin/perl
#########################################################################
# Small Mod made by me to use my startup script, so my logs stay as i   #
# have them -- So my log cleaner/compresser works without mods --GW     #
# PLEASE GO TO THE LAST LINE OF THE FILE, AND CHANGE WHERE IT SAYS TO!! #
#########################################################################
# mudcheck.pl                           Version 1.0                     #
# Created: Jun 28, 1997                 Jared Proudfoot                 #
# Last Modified: Jun 28, 1997           jproudfo@footprints.net         #
#########################################################################
# README                                                                #
#                                                                       #
# This is a pretty simple script that checks to see if a mud is running #
# properly.  Be sure to change the 'important vars' section.  The best  #
# idea is to run this script from cron every couple of minutes... That  #
# way you can be sure that it stays running.                            #
#########################################################################
# CHANGES AND HISTORY                                                   #
#                                                                       #
# v 1.0, Jun 28, 1997   Created.  Seems to work fine now.               #
#########################################################################
#########################################################################
# Define the important vars                                             #
#                                                                       #
# Define the host and port number where the mud resides.                #
#here
$server         =       "localhost";
$port           =       "8000";

# $string is the string of characters we will look for upon connecting. #
# If we connect, but don't see this string, we will assume the mud      #
# isn't responding (locked up?) and we'll restart it.  The string       #
# *must* be on the first line after connect.

# You may enter this as a regexp if you wish.                           #

$replyString            =       "^\n";

# How long do we wait before we connect timeout (in seconds)?           #

$timeOut        =       "60";

# What to execute if we need to restart the mud.  Please include the    #
# FULL path.                                                            #
#here
$exec           =       "~/pr/src/pr";

# Path where you want the mud logs to be kept.
#here
$logdir         =       "~/pr/log";
#here
# Path where we should start the mud from.                              #
$startPath      =       "~/pr/area";

# That's it.  You shouldn't need to change anything after this line.    #
#########################################################################

# What do we need to use?
use Socket;
require 5.003;

#########################################################################
# Main                                                                  #
#########################################################################

if (&connect_server == 0) {
        # If we couldn't connect, try and restart.                      #
        print ("Connection to $server on port $port failed or timed out after $timeOut seconds!\n");
        $time = (scalar localtime);
        print ("Attempting to restart the mud on $time...\n");
        # Restart the mud                                               #
        &restart_mud;
}
else {
        # We connected, but is it working properly?                     #
                $readline = (&gl);
                if ($readline =~ /$replyString/) {
                        # We found what we were looking for, so exit    #
                        # properly.                                     #
                        &disconnect_server;
                        exit 1;
                }
        # After all those searches, we didn't find anything.  The mud   #
        # must be locked up.  Lets kill and restart it.                 #
        &disconnect_server;
        print ("The connection was sucessful, but it doesn't seem to be responding\n");
        $time = (scalar localtime);
        print ("Attempting to restart the mud on $time...\n");
        system("killall $exec");
        &restart_mud;
}



#########################################################################
# Subroutines                                                           #
#########################################################################


sub connect_server {
        # Connect to the server                                         #
        my ($iaddr, $paddr, $proto);
        $iaddr = inet_aton ($server)
                or die ("ERROR: No host: $server!\n");
        $paddr = sockaddr_in ($port, $iaddr);
        $proto = getprotobyname('tcp');
        socket (SOCK, PF_INET, SOCK_STREAM, $proto)
                or die ("ERROR: Socket error $!\n");
        alarm ($timeOut);
        if (connect (SOCK, $paddr)) {;
                alarm (0);
                return 1;
        }
        else {
                return 0;
        }
}

sub disconnect_server {
        # Disconnect from the server                                    #
        close (SOCK);
        return;
}

sub sl {
        # Send a line                                                   #
        my ($line)=@_;
        print SOCK ("$line")
                or die ("ERROR: Error writing to server: $!\n");
        select SOCK;
        $|=1;
        select STDOUT;
        $|=1;
        return;
}

sub gl {
        # Get a line                                                    #
        my ($buffer, @reply);
        $buffer=(<SOCK>);
#       (@reply) = split (/\s/, $buffer);
#       return (@reply);
        return ($buffer);
}

sub restart_mud {
                # Restart the mud                                       #
                $timet = time();
                chdir $startPath;
#here
                system ("~/pr/src/startxanth &");
                return;
}