Question

I’ve been playing around with SSH and now I need to change a user’s password via the PHP’s ssh2,

Here’s my code:

$stream = ssh2_exec($ssh, 'passwd test1234');
stream_set_blocking($stream, true);
$data = '';
while($buffer = fread($stream, 4096)) {
    $data .= $buffer;
}
fclose($stream);
echo $data."<hr/>";

$stream = ssh2_exec($ssh, 'saulius123');
stream_set_blocking($stream, true);
$data = '';
while($buffer = fread($stream, 4096)) {
    $data .= $buffer;
}
echo $data."<hr/>";
$stream = ssh2_exec($ssh, 'saulius123');
    stream_set_blocking($stream, true);
    $data = '';
    while($buffer = fread($stream, 4096)) {
        $data .= $buffer;
    }
    echo $data."<hr/>";

However this just make’s my PHP script hang, any ideas?

Answer 1

ssh2_exec invokes the command; to send input, you’ll need to write to the stream.

That is, $stream gives you access to standard input and standard output. So you’ll need to write the password you wish to set using fwrite on $stream before trying to read back the output.

Since you’ve put the stream in blocking mode, passwd is awaiting your input (the password) at the same time your script is waiting for passwd. As a result, the script hangs.