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List: libssh2-devel
Subject: Re: [libssh2] (no subject)
From: "Paul Thomas" <thomaspu () gmail ! com>
Date: 2007-09-10 16:51:37
Message-ID: c52222ba0709100951n7eb524a8q6d81c4d403ac0d14 () mail ! gmail ! com
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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@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@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@isquaredsoftware.com> wrote:
> >
> > > From: "Paul Thomas" <thomaspu@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@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
> >
> > -------------------------------------------------------------------------
> >
> > This SF.net email is sponsored by: Microsoft
> > Defy all challenges. Microsoft(R) Visual Studio 2005.
> > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
> > _______________________________________________
> > libssh2-devel mailing list
> > libssh2-devel@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/libssh2-devel
> >
>
>
[Attachment #5 (text/html)]
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?<br><br><div><span \
class="gmail_quote"> On 9/9/07, <b class="gmail_sendername">Paul Thomas</b> \
<<a href="mailto:thomaspu@gmail.com">thomaspu@gmail.com</a>> \
wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid \
rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> 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.<br><br> \
if (libssh2_channel_request_pty(m_channel, "vt100")) { \
<br> log( \
"Failed requesting pty");<br> \
}<br><br> if \
(libssh2_channel_shell(m_channel)) {<br> \
log( "Unable to request shell on \
allocated pty");<br> }<br><br> \
if ( \
libssh2_poll_channel_read(m_channel, 0) ) <br>
log("hey, \
theres data");<br><br> \
libssh2_channel_write(m_channel, "/bin/bash\r\n", \
strlen("/bin/bash\r\n"));<br><br> \
if ( libssh2_poll_channel_read(m_channel, 0) )<br>
log("hey, \
theres data");<br><br>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:<br> user@computername $<br>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? <br><br>Thanks,<br><span \
class="sg">Paul</span><div><span class="e" \
id="q_114e8bb8e336689e_2"><br><br><div><span class="gmail_quote">On 9/9/07, \
<b class="gmail_sendername">Mark Erikson</b> <<a \
href="mailto:mark@isquaredsoftware.com" target="_blank" onclick="return \
top.js.OpenExtLink(window,event,this)"> mark@isquaredsoftware.com</a>> \
wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid \
rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> > \
From: "Paul Thomas" <<a href="mailto:thomaspu@gmail.com" \
target="_blank" onclick="return \
top.js.OpenExtLink(window,event,this)">thomaspu@gmail.com</a>><br>> \
Subject: [libssh2] Interacting with a shell how? <br>><br>> So \
I've been reading through the docs and I've got a working example \
that <br>> can get to the point where it can open up a shell on a pty, \
but after that<br>> suceeds what do I do now?<br>><br>> The guides \
all say<br>> /* At this point the shell can be \
interacted with using <br>
> * \
libssh2_channel_read()<br>> * \
libssh2_channel_read_stderr()<br>> * \
libssh2_channel_write()<br>> * \
libssh2_channel_write_stderr()<br>><br>> Thats nice, but I expected \
that after I requested a shell that there would <br>> be some data on \
the socket ready to be read that contained something \
like:<br>> paul@computerName ~ $<br>><br>> \
What am I missing here? I've been unable to find much help online in \
the<br>> form of docs talking about ssh with the exception of the RFCs \
and these talk <br>> about the protocol, not what do do when its already \
connected.<br>><br>> Help? Advice?<br>> Paul<br><br>I've also \
been working on a project which uses libssh2 to create \
a<br>shell. I don't have a good, simple example to give you, \
since it's a <br>GUI program that contains code adapted from several \
different sources,<br>and things are ugly right now. But, let me \
see if I can give an<br>overview of how I've got things \
working.<br><br>I have an SSHConnection class that encapsulates the socket \
IO. Whenever <br>the socket reports that there's input \
available, I call<br>SSHConnection->Read(void * buffer, uint \
nbytes). Read() does some<br>calculations to figure out exactly \
how much to read from the channel,<br>does a libssh2_poll() to confirm that \
it's ready to read, then creates a <br>new char[] buffer and calls \
libssh2_channel_read(channel, buffer,<br>actualNBytes). From \
there, you should be able to do whatever you want<br>with the \
data.<br><br>Writing's pretty simple. Whenever the user \
types, I call <br>SSHConnection->Write(char* data, int len), which \
passes it on to<br>libssh2_channel_write(channel, data, len).<br><br>My \
project is still pretty much a throwaway test with a lot of glitches,<br>so \
I don't claim to have this perfected. Still, hopefully that \
will <br>give you a bit of an idea where to head.<br><br>Mark Erikson<br><a \
href="http://www.isquaredsoftware.com" target="_blank" onclick="return \
top.js.OpenExtLink(window,event,this)">http://www.isquaredsoftware.com</a><br>
<br>-------------------------------------------------------------------------
<br>This SF.net email is sponsored by: Microsoft<br>Defy all challenges. \
Microsoft(R) Visual Studio 2005.<br><a \
href="http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/" \
target="_blank" onclick="return top.js.OpenExtLink(window,event,this)"> \
http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ \
</a><br>_______________________________________________<br>libssh2-devel \
mailing list<br><a href="mailto:libssh2-devel@lists.sourceforge.net" \
target="_blank" onclick="return \
top.js.OpenExtLink(window,event,this)">libssh2-devel@lists.sourceforge.net \
</a><br><a href="https://lists.sourceforge.net/lists/listinfo/libssh2-devel" \
target="_blank" onclick="return top.js.OpenExtLink(window,event,this)"> \
https://lists.sourceforge.net/lists/listinfo/libssh2-devel</a><br></blockquote></div><br>
</span></div></blockquote></div><br>
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Defy all challenges. Microsoft(R) Visual Studio 2005.
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