Hi,
I am struggling to find a way to kill a proc_open() stream if it remains
idle (hangs). Specifically, I am opening an SSH connection up and running a
remote command - all from a PHP script run from the shell. Under the rare
circumstance that my passwordless authentication fails (ie: it sits there
waiting for a password), I want to be able to 1) check to see if this is the
case 2) kill the stream 3) move on to other tasks. My "solution" (it
doesn't work) has been to set blocking to false, and check to see if it
continues looping in the fread() for 5 seconds. If the loop is > 5 seconds,
I try to send a CTRL-C to the opened ssh command, break out of the loop and
move on. But, the CTRL-C doesn't kill the ssh command, and the script gets
stuck (ie: it doesn't do it's var_export) until I manually CTRL-C from the
shell. looks like this so far:
$spec = array(
0 => array("pipe", "r"),
1 => array("pipe", "w"),
2 => array("file", "/tmp/error-output.txt", "a")
);
$process = proc_open(''ssh somehost someremotecommand';', $spec, $pipes);
if (is_resource($process)) {
stream_set_blocking($pipes[1], false);
stream_set_blocking($pipes[0], false);
$contents = '';
$time = time();
while (!feof($pipes[1])) {
$contents .= fread($pipes[1], 8192);
if (time() - $time > 5) {
// send ctrl-c
fwrite($pipes[0], chr(4));
break;
}
}
fclose($pipes[0]);
fclose($pipes[1]);
$return_value = proc_close($process);
}
var_export($contents);
die();
Any ideas on how I can do this?
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