So I take it no one out there has any idea how to actually get things going
with this library? I can create the shell..now what? Why isn't there a bash
like prompt being sent back to me over the socket?
On 9/9/07, Paul Thomas <thomaspu_at_gmail.com> wrote:
>
> The problem that I have isn't that I don't know how to read and write
> stuff to my ssh connection, its that after setting up a shell, I don't get
> anything over the socket.
>
> if (libssh2_channel_request_pty(m_channel, "vt100")) {
> log( "Failed requesting pty");
> }
>
> if (libssh2_channel_shell(m_channel)) {
> log( "Unable to request shell on allocated pty");
> }
>
> if ( libssh2_poll_channel_read(m_channel, 0) )
> log("hey, theres data");
>
> libssh2_channel_write(m_channel, "/bin/bash\r\n",
> strlen("/bin/bash\r\n"));
>
> if ( libssh2_poll_channel_read(m_channel, 0) )
> log("hey, theres data");
>
> So after getting a shell on a pty, I'd expect that there be some data
> waiting to be read from the socket.. like the prompt:
> user_at_computername $
> But there's nothing. So I tried to startup a terminal and then read from
> the channel and still no data. How do I tell it to fire up a terminal on the
> remote end? Or how do I get the default prompt?
>
> Thanks,
> Paul
>
> On 9/9/07, Mark Erikson <mark_at_isquaredsoftware.com> wrote:
> >
> > > From: "Paul Thomas" <thomaspu_at_gmail.com>
> > > Subject: [libssh2] Interacting with a shell how?
> > >
> > > So I've been reading through the docs and I've got a working example
> > that
> > > can get to the point where it can open up a shell on a pty, but after
> > that
> > > suceeds what do I do now?
> > >
> > > The guides all say
> > > /* At this point the shell can be interacted with using
> > > * libssh2_channel_read()
> > > * libssh2_channel_read_stderr()
> > > * libssh2_channel_write()
> > > * libssh2_channel_write_stderr()
> > >
> > > Thats nice, but I expected that after I requested a shell that there
> > would
> > > be some data on the socket ready to be read that contained something
> > like:
> > > paul_at_computerName ~ $
> > >
> > > What am I missing here? I've been unable to find much help online in
> > the
> > > form of docs talking about ssh with the exception of the RFCs and
> > these talk
> > > about the protocol, not what do do when its already connected.
> > >
> > > Help? Advice?
> > > Paul
> >
> > I've also been working on a project which uses libssh2 to create a
> > shell. I don't have a good, simple example to give you, since it's a
> > GUI program that contains code adapted from several different sources,
> > and things are ugly right now. But, let me see if I can give an
> > overview of how I've got things working.
> >
> > I have an SSHConnection class that encapsulates the socket IO. Whenever
> >
> > the socket reports that there's input available, I call
> > SSHConnection->Read(void * buffer, uint nbytes). Read() does some
> > calculations to figure out exactly how much to read from the channel,
> > does a libssh2_poll() to confirm that it's ready to read, then creates a
> >
> > new char[] buffer and calls libssh2_channel_read(channel, buffer,
> > actualNBytes). From there, you should be able to do whatever you want
> > with the data.
> >
> > Writing's pretty simple. Whenever the user types, I call
> > SSHConnection->Write(char* data, int len), which passes it on to
> > libssh2_channel_write(channel, data, len).
> >
> > My project is still pretty much a throwaway test with a lot of glitches,
> > so I don't claim to have this perfected. Still, hopefully that will
> > give you a bit of an idea where to head.
> >
> > Mark Erikson
> > http://www.isquaredsoftware.com
> >
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>
>
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Received on 2007-09-10