I'm baffled by Net::SSH2::Channel. I have a script, working quite well :o), that runs a command on a channel via "exec" and collects the output. What's baffling me is how to send data *to* the command. There's stuff I don't fully understand about blocking mode and strange errors and such. I understand about the difficulties of running interactive commands remotely, but that's not what I want to do. I just want to feed a bunch of data to the command and then wait for the answer. I tried modifying my {sub docode} routine {which is probably still over in the Cool Uses section} to take text-to-send as an argument:
{   my $sendtext = $_[1] ;  # new
    my $chan = $ssh2->channel() or $ssh2->die_with_error ;
    $chan->blocking(1) ;   #new
    $chan->exec("($_[0]) 2>&1") ;
    my $write = $chan->write($sendtext) ;  #new
    $ssh2->die_with_error() unless $write ;  #new
    if ($write != length($sendtext))   #new
    {   die "Only $write bytes were sent!\n" ; }   #new
    my $out = "";
    while (!$chan->eof)
    {   my $buffer = "";
        if (not defined ($chan->read($buffer, 100)))
        {   $ssh2->die_with_error() ; }
        $out .= $buffer ;
    }

[download]

I checked by calling it with docmd("cat >sshfile", "this is a test")and I was delighted to see 

~$ cat sshfile
This is a test

[download]

So I *can* write to the ssh connection but the 'read' never returns.. it just hangs-- I just don't know how to get read and write to play nice together.

In reply to Writing to an SSH channel by BernieC

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