On linux it says:
-t ttl Set the IP Time to Live for multicasted packets. This flag
only
applies if the ping destination is a multicast address.
> -----Original Message-----
> From: Philip Hallstrom [mailto:[EMAIL PROTECTED]]
> Sent: Friday, February 07, 2003 4:31 PM
> To: Daevid Vincent
> Cc: [EMAIL PROTECTED]
> Subject: [PHP] Re: How do I force a 'timeout' in a loop for
> that itteration, or conversley how to timeout a 'ping" request?
>
>
> Not sure on linux, but on freebsd ping's man page says:
>
> -t timeout Specify a timeout, in seconds, before ping exits regardless
> of how many packets have been recieved.
>
> On Fri, 7 Feb 2003, Daevid Vincent wrote:
>
> > I'm trying to automate finding pingable domains given an IP
> or a domain.
> > The problem is that some domains don't actually return
> "pings", and on
> > Linux, it just sits there forever (ugh!). So... Can someone
> tell me how
> > to 'abort' or 'timeout' an itteration of a loop. Maybe
> start a timer and
> > then check if a number of millis has gone by? But it seems
> that won't
> > work b/c PHP isn't threaded, it will just hang at the exec() command
> > right? Converseley, anyone know how to force a /bin/ping to
> > automatically timeout (sans hitting CTRL+C)? I 'man ping'
> but it didn't
> > seem to have that option.
> > Here is the code I'm using...
> >
> > $typeArray = array ( 'www' => false,
> > 'ftp' => false,
> > 'mail' => false,
> > 'exchange' => false,
> > 'owa' => false,
> > 'dns' => false,
> > 'dns1' => false,
> > 'dns2' => false,
> > 'dns3' => false,
> > 'router' => false,
> > 'firewall' => false,
> > 'fw' => false,
> > 'fw1' => false,
> > 'sql' => false,
> > 'db' => false,
> > 'database' => false,
> > 'crm' => false
> > );
> >
> > reset($typeArray);
> > while ( list($key, $val) = each($typeArray) )
> > {
> > $testDomain = $key.".".$domain;
> > $pingtest = exec("/bin/ping -c 1 -q ".$testDomain);
> > //echo "<I><FONT SIZE=-3>pingtest of ".$testDomain." =
> > ".$pingtest."</FONT></I><BR>\n";
> > if ( strstr($pingtest,"rtt min") )
> > {
> > $typeArray[$key] = gethostbyname($testDomain);
> > echo "<INPUT TYPE='checkbox' NAME='IPcheckbox[]'
> > VALUE='".$typeArray[$key]."' CHECKED>".$testDomain."
> > (".$typeArray[$key].")<BR>\n";
> > $ipCounter++;
> > }
> > //sleep(3);
> > }
> > if ($ipCounter == 0)
> > echo "<B>No pingable domains found in our test
> > list</B><BR>";
> >
> >
> > --
> > PHP General Mailing List (http://www.php.net/)
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> >
>
>
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