cheking if pc is online & running a prog

[neo644]

the idea is to ping an ip, and then chek a port to see if a prog is running. sicne the prog uses that port

function ping($host, $port) {
$ip=gethostbyname($host);
$result=ping -n 1 -l 1 $ip;
$a = strpos ($result, "ms");
if (!$a) {
echo "Offline";
} else {
if (!fsockopen $ip, $port, &$errno, &$errstr, 30)) {
echo "<p>error num: ".$errno."</p>".$errstr;
} else {
echo "Online";
}
}
}
though it doesnt work
i do ping ("200.49.147.10", 27015)
but i get
error num: 9
Bad file descriptor

help?

[Anon]

Why not use PHP's fsockopen() function? If it returns false, it means that the program is not running. If it returns not false, then it is running.

Diego

[neo644]

i did use it.. dont u read?

[Anon]

Yeah, I do read, and you are using ping before fsockopen. There's no reason to use ping if you're not using the response time.

And your script does work, I just tested it with my web server, port 80, and it said it was online.

What I mean but not needing to use ping, is like this:

function ping($host, $port) {
$ip=gethostbyname($host);
if (!fsockopen($ip, $port, &$errno, &$errstr, 30)) {
echo "<p>error num: ".$errno."</p>".$errstr;
} else {
echo "Online";
}
}

That's enough to tell whether a port is open or not. You don't need to first test if the computer is online or not.

Diego

[neo644]

true, true
but, i try pinging port 27015 and i get that error i mentioned..
i also tryind with port 80 on my web server and it worked.. maybe i have to define wat port 27015 is or something?

[Anon]

But that's your error, it comes from:

echo "<p>error num: ".$errno."</p>".$errstr;

which means that port 27015 is not open...

I don't think I understand your problem...

Diego

[[deleted]]

Mind your manners, we're here to help, not to get smartass remarks from those who ask the questions.

Like Diego said, it makes no sense to ping before trying to open a port, so don't.

Have you checked the host and port that you use for the fsockopen? Are you behind a firewall or proxy?

[neo644]

ok, im sorry, i didnt intend to talk that why, its just that i didnt he see his point, thing is i first usd the ping and then i realized i got a result, but the prog wasnt running, so i added to chek if the port was open and didnt realize i could just check the port

and i am 100% sure the prog is running and this ip for example:
ip: 200.49.147.10
port: 27015

and from where im running the script i have a direct cable conection

[Anon]

I don't get any response from that port either...

On the computer that has the port 27015 open run this:
netstat -an

and see if port 27015 is listening. Maybe the program is running, but it failed to initialize the socket...

Diego