introducing moxanix script for controling servers

.gitignore

@@ -4,3 +4,5 @@ moxerver
 # object files
 *.o
 
+# logs directory during development
+logs

moxanix.sh

@@ -0,0 +1,55 @@
+#!/bin/bash
+
+# Main script for controlling servers.
+
+
+usage ()
+{
+echo "Usage: ./$(basename $0) COMMAND ID"
+echo "	COMMAND: start, stop"
+echo "	ID: 1-7"
+}
+
+##########
+
+# check parameter count
+if [ $# != 2 ]; then
+	usage
+	exit
+fi
+
+# grab parameters
+COMMAND=$1
+ID=$2
+
+# set variables
+TCP_PORT=$((4000 + $ID))
+TTY_PATH="/dev/ttyS$ID"
+
+LOGDIR="./logs"
+LOGFILE="$LOGDIR/moxerver$ID.log"
+
+# execute commands
+if [ "$COMMAND" = "start" ]; then
+	# create log directory if it doesn't exist
+	if [ ! -d $LOGDIR ]; then
+		mkdir -p $LOGDIR
+	fi
+	# start moxerver, redirect stdout and stderr to logfile
+	# nohup keeps it running when the script ends
+	nohup ./moxerver -p $TCP_PORT -t $TTY_PATH > $LOGFILE 2>&1 &
+	
+elif [ "$COMMAND" = "stop" ]; then
+	# ps axf 				-> list all processes with PID as first field
+	# grep [m]oxerver...	-> [] trick eliminates the actual grep process from results
+	# awk '{print $1}' 		-> print the first field from the line, in this case PID
+	pid=$(ps axf | grep "[m]oxerver -p $TCP_PORT" | awk '{print $1}')
+	if [ $pid = "" ]; then
+		echo "nothing to kill"
+	fi
+	kill -s SIGTERM $pid
+	
+else
+	# unsupported command
+	usage
+fi

moxerver.c

@@ -60,7 +60,7 @@ int main(int argc, char *argv[]) {
 
 	pthread_t tty_thread; 
 	
-	/* catch and handle some quit signals, SIGKILL can't be caught */
+	/* enable catching and handling some quit signals, SIGKILL can't be caught */
 	signal(SIGTERM, quit_handler);
 	signal(SIGQUIT, quit_handler);
 	signal(SIGINT, quit_handler);
@@ -105,10 +105,8 @@ int main(int argc, char *argv[]) {
 		}
 	}
 	
-	/* introduction message */
-	fprintf(stderr, "[%s] === MoxaNix ===\n", NAME);
-	
 	/* initialize */
+	fprintf(stderr, "[%s] TCP port: %d, TTY device path: %s\n", NAME, tcp_port, tty_dev.path); 
 	if (server_setup(&server, tcp_port) < 0) return -1;
 	client.socket = -1;
 	tty_dev.fd = -1;