APseudoUtopia wrote: > Hey list, > > I have a php cli script that listens on a UDP socket and, when data is > sent to the socket, the script inserts it into a database. I'm using > the real BSD socket functions, not fsock. > > The script runs socket_create(), then socket_bind(). Then it starts a > while(TRUE) loop. Within the loop, it runs socket_recvfrom(). I have > it running 24/7 inside a screen window. > > I'm curious as to the cpu/memory/etc usage of a while(true) loop. The > `top` command shows that the process is in the sbwait state (the OS is > FreeBSD). I'm contemplating adding a usleep or even a sleep inside to > loop. Would this be beneficial? I'm not too sure of how the internals > of PHP work in terms of loops and such. > > Thanks. >
Here is something I wrote a few years ago. I still have this running on my system today... #!/usr/local/bin/php -q <?php error_reporting(E_ALL); ini_set('display_errors', 'On'); // Set time limit to indefinite execution set_time_limit(0); // Set the ip and port we will listen on define('LISTEN_IP', 'x.x.x.x'); // IP to listin on define('LISTEN_PORT', 28000); // Port number to listen on define('PACKET_SIZE', 512); // 512 bytes define('SOCKET_TIMOUT', 2); // In Seconds /* Open a server socket to port 1234 on localhost */ if ( $socket = @stream_socket_server('udp://'.LISTEN_IP.':'.LISTEN_PORT, $errno, $errstr, STREAM_SERVER_BIND) ) { echo "Running!!!\n"; while ( true ) { // Output something to the screen to indicate that it is running echo '.'; /* Get the exact same packet again, but remove it from the buffer * this time. */ $buff = stream_socket_recvfrom($socket, PACKET_SIZE, 0, $remote_ip); # Checking to see if someone is sending an invalid packet to my # server # Minimum packet size is 4 bytes if ( strlen($buff) <= 4 ) { continue; } print_r($buff); } fclose($socket); } echo "Done!!!\n"; ###################END Until recently, I was using screen also, but I have now switched over to a new start/stop script. I run OpenBSD 4.3 & 4.5 on most of my boxes. Once configured, this shell script can start/stop/status the given process. I have been told that this does not start a /true/ daemon. But for me it is close enough. change the 4 variables at the top, just under the set -e line, and you should have it. Let me know if you have any problems. #! /bin/ksh # # tms_daemon # # Starts a listening daemon that acts as a Tribes Master Server # # Author: Jim Lucas <jlu...@cmsws.com> # # Version: 0.0.1 # set -e DESC="Name of service" DAEMON=/path/to/file.php PIDFILE=/var/run/<NAME>.pid SCRIPTNAME=tms_daemon # Gracefully exit if the package has been removed. test -x $DAEMON || exit 0 # # Function that starts the daemon/service. # d_start() { if [ -f $PIDFILE ]; then echo "$DESC already running: PID# `cat $PIDFILE`" exit 1 else echo -n "Starting $DESC" nohup $DAEMON 2>&1 1>/dev/null & sleep 0.5 ps aux | grep $DAEMON | grep -v grep | awk -F' ' '{print $2} ' > $PIDFILE echo ". [`cat $PIDFILE`]" fi } # # Function that stops the daemon/service. # d_stop() { if [ -f $PIDFILE ]; then echo -n "Stopping $DESC" kill `cat $PIDFILE` rm $PIDFILE echo "." else echo "$DESC is not running" exit 1 fi } case "$1" in start) d_start ;; stop) d_stop ;; status) if [ -f $PIDFILE ]; then echo "$DESC is running: PID# `cat $PIDFILE`" else echo "$DESC is not running" fi ;; cleanup) PID="`ps aux | grep $DAEMON | grep -v grep | awk -F' ' '{print $2}'`" kill $PID rm $PIDFILE ;; restart|force-reload) d_stop sleep 0.5 d_start ;; *) echo "Usage: $SCRIPTNAME {start|stop|restart|force-reload}" >&2 exit 1 ;; esac exit 0 ##############END Jim Lucas -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php