RE: Unable to execute program

[h2c357 h2c357 <h2c357@xxxxxxx>]

Thanks Aris,

I did what you suggested and it proved what I had thought before. The error complains about shared libraries not being found. So I my .bashrc and .bash_profile files to export the shared library path and it worked like a charm.

Thanks a lot.


> Date: Fri, 14 Oct 2011 13:00:00 +0200
> From: aris@xxxxxxxxxxxx
> To: libssh@xxxxxxxxxx
> Subject: Re: Unable to execute program
> 
> Hi,
> 
> Have a look at the output of stderr : ssh_channel_read(..., 1);
> 
> This will give more info about what's happening.
> Also, ssh_channel_request_exec is returning immediatly, and does not
> return the exit code of the process. For this, you should look at
> ssh_channel_exit_status.
> 
> Kr,
> 
> Aris
> 
> Le 14/10/11 12:32, h2c357 h2c357 a écrit :
> > Hi all,
> > 
> > I am running sshd on Fedora Core 15 and my ssh client is running on
> > Window XP(sorry). I have an executable which requires some .so files to
> > run. The whole directory structure becomes something like following:
> > 
> > /home/h2c357/app/bin/my_executable (This is the path my executable)
> > 
> > (my lib directories are stored in following locations)
> > /home/h2c357/app/lib/
> > /usr/lib/oracle/11.2/client64/lib
> > 
> > Now when I try to execute my_executable on remote machine via libssh
> > client, I do not get any error (channel_request_exec() returns 0) but
> > when I try to read program output (it prints some data it reads from the
> > db), I get bytes read count 0. Also system monitor on FC15 does not show
> > my process.
> > 
> > Please let me know what I might be doing wrong.
> > 
> > Below is the code that I have written:
> > 
> >             ssh_channel createChannel(ssh_session session_)
> >             {
> >                 ssh_channel channel;
> >                 bool isChannelCreated_ = true;
> > 
> >                 channel = channel_new(session_);
> >                 if (channel == NULL)
> >                 {
> >                     isChannelCreated_ = false;
> >                     return NULL;
> >                 }
> > 
> >                 if (channel_open_session(channel) != SSH_OK)
> >                 {
> >                     isChannelCreated_ = false;
> >                     channel_free(channel);
> >                     return NULL;
> >                 }
> >                
> >                 return channel;
> >             }
> > 
> >             void execute(std::string appCmdLine, std::string ldCommand)
> >             {
> >                     int execStatus_ = 0;
> >                     ssh_channel channel = createChannel();
> >                     if (!isChannelCreated_ || channel == NULL)
> >                     {
> >                         execStatus_ = EXEC_STATUS_FAILURE;
> >                         return;
> >                     }
> > 
> >                     int rc = channel_request_exec(channel,
> > appCmdLine.c_str());
> >                     if (rc != SSH_OK)
> >                     {
> >                         execStatus_ = EXEC_STATUS_FAILURE;
> >                         channel_close(channel);
> >                         channel_free(channel);
> >                     }
> >                     else
> >                     {
> >                         execStatus_ = EXEC_STATUS_SUCCESS;
> > 
> >                         char buffer[256];
> >                         unsigned int nbytes;
> > 
> >                         nbytes = channel_read(channel, buffer,
> > sizeof(buffer), 0);
> >                         while (nbytes > 0)
> >                         {
> >                             if (fwrite(buffer, 1, nbytes, stdout) != nbytes)
> >                             {
> >                                 ssh_channel_close(channel);
> >                                 ssh_channel_free(channel);
> >                                 return;
> >                             }
> >                             nbytes = ssh_channel_read(channel, buffer,
> > sizeof(buffer), 0);
> >                         }
> > 
> >                         if (nbytes < 0)
> >                         {
> >                             ssh_channel_close(channel);
> >                             ssh_channel_free(channel);
> >                             return;
> >                         }
> >                         channel_send_eof(channel);
> >                         closeChannel(channel);
> >                     }
> >                 }
> > 
>