how to sent custom command using sftp?

Question

I want to send custom command using sftp, for communicating to server.
same like as ftp.

Answer 1

Sending remote commands can be done via SshChannel.RequestExec methods:

// open an SSH session channel over a connected SFTP client
SshChannel channel = sftp.Session.OpenSession();

// execute the 'uname' command to get OS info
channel.RequestExec("uname -a");

// process the command response
var response = new StringBuilder();
var buffer = new byte[4096];
while (true)
{
    int n = channel.Receive(buffer, 0, buffer.Length);
    if (n == 0)
    {
        channel.Close();
        break;
    }

    response.Append(Encoding.Default.GetString(buffer, 0, n));
}
Console.WriteLine("OS info: {0}", response);

You can learn more at https://www.rebex.net/sftp.net/features/ssh.aspx#remote-exec

For more complex scenarios, e.g. scripting an SSH terminal, I recommend our Terminal Emulation component that provides a dedicated Scripting API.

Rebex Terminal Emulation can be purchased together with Rebex SFTP for a discounted price as Rebex SSH Pack.

Comments

RequestExec() is for executing standard commands. How do I send custom commands from my SFTP client?  I can see that SFTP server supports custom commands. http://www.rebex.net/file-server/features/ssh.aspx#custom-commands

---

You can use RequestExec() for any command. If you have implemented a custom command  on your server using the link you posted, you can use that command in RequestExec() method the same way as Tomas did above.

---

Thanks. Just wanted to double-check: SshChannel::Receive() is a blocking call. Pls confirm.

---

Yes, SshChannel.Receive() is blocking operation.