No way to send stdin to running process.

[rustyscottweber]

I love what is here and would like to know more about this project to expand the capability of what pywinrm can do. Most importantly, I want to add the capability to send stdin to the running process. Can this be easily done? or is this impossible?

[pdunnigan]

Can you be more specific?

What is the "running process"? A process triggered by winrm on the
windows server? Or an existing process started by something else?

Maybe a specific use case would help.

Thanks

rustyscottweber wrote:

I love what is here and would like to know more about this project to
expand the capability of what pywinrm can do. Most importantly, I want
to add the capability to send stdin to the running process. Can this
be easily done? or is this impossible?

[rustyscottweber]

Specifically, I would like to send stdin to a process that was generated by win rm so that I can provide answers to the running process.

[rustyscottweber]

I've specially been looking at the protocol object's _raw_get_command_output method to see if there was something there that would allow a string be sent to a process given a cmd id and console id. However, my knowledge of what is going on is quite limited.

[diyan]

@rustyscottweber Looks like you are talking about expect and pexpect tools.

Agree, it's nice to manage stdin/sdout remotely but this should be implemented in another library on top of pywinrm.

IMO it's not in scope of pywinrm.

...but if someone would take this challenge and will ask for some changes in pywinrm - I would be happy to discuss.

Closing for now. Feel free to re-open.

[rustyscottweber]

I think you misunderstand. Currently, I am not attempting mirror the functionality of expect and pexpect in pywinrm. I am merely attempting to send input, preferably as a string, to a process that I am already managing remotely through pywinrm.

self.win_rm_session = winrm.Session(self.hostname,
                                                    (self.username, self.password))
self.protocol = self.win_rm_session.protocol
self.shell_id = self.protocol.open_shell()
self.command_id = self.protocol.run_command(self.shell_id, cmd)
command_done = False
while not command_done:
    # how do I send stdin?
    stdout, stderr, return_code, command_done = self.protocol._raw_get_command_output(self.shell_id, self.command_id)

[diyan]

@rustyscottweber Oh. I see. Basically you just want to send predefined stdin to a process without any conditions and smart interactions, correct? I'm re-opening this issue since functionaliy is not yet present in pywinrm. Need to think about implementation.

[rustyscottweber]

Yes. That is exactly what I would like to accomplish. However, my knowledge of Windows rpc xml is limited. It would make sense that the _raw_get_command_output's stream variable would also take a stdin parameter to send to the process, but this is Windows and being that easy is against the rules.

[rustyscottweber]

http://www.rubydoc.info/github/WinRb/WinRM/WinRM/WinRMWebService#write_stdin-instance_method
According to a simple google search, a method already exists in ruby's extensions for pywinrm.

def write_stdin(shell_id, command_id, stdin)
  # Signal the Command references to terminate (close stdout/stderr)
  body = {
    "#{NS_WIN_SHELL}:Send" => {
      "#{NS_WIN_SHELL}:Stream" => {
        "@Name" => 'stdin',
        "@CommandId" => command_id,
        :content! => Base64.encode64(stdin)
      }
    }
  }
  builder = Builder::XmlMarkup.new
  builder.instruct!(:xml, :encoding => 'UTF-8')
  builder.tag! :env, :Envelope, namespaces do |env|
    env.tag!(:env, :Header) { |h| h << Gyoku.xml(merge_headers(header,resource_uri_cmd,action_send,selector_shell_id(shell_id))) }
    env.tag!(:env, :Body) do |env_body|
      env_body << Gyoku.xml(body)
    end
  end
  resp = send_message(builder.target!)
  true
end

How this translates in python is not yet clear to me however.

[rustyscottweber]

For reference.
https://msdn.microsoft.com/en-us/library/cc251742.aspx

[rustyscottweber]

What I currently have. However, this gives me

    def _send_to_input(self, shell_id, command_id, input, i_stream='stdin'):
        rq = {'env:Envelope': self._get_soap_header(
                                                    resource_uri='http://schemas.microsoft.com/wbem/wsman/1/windows/shell/cmd',
                                                    action='http://schemas.microsoft.com/wbem/wsman/1/windows/shell/Send',
                                                    shell_id=shell_id)}
        stream = rq['env:Envelope'].setdefault('env:Body', {}).setdefault('rsp:Send', {}).setdefault('rsp:Stream', {})
        stream['@CommandId'] = command_id
        stream['@Name'] = i_stream
        stream['#text'] = input
        xml_out = xmltodict.unparse(rq)
        rs = self.send_message(xml_out)

However, I get the following message returned and I'm confused as to it's meaning.

<?xml version="1.0"?>
<s:Envelope xmlns:s="http://www.w3.org/2003/05/soap-envelope" xmlns:a="http://schemas.xmlsoap.org/ws/2004/08/addressing" xmlns:x="http://schemas.xmlsoap.org/ws/2004/09/transfer" xmlns:e="http://schemas.xmlsoap.org/ws/2004/08/eventing" xmlns:n="http://schemas.xmlsoap.org/ws/2004/09/enumeration" xmlns:w="http://schemas.dmtf.org/wbem/wsman/1/wsman.xsd" xmlns:p="http://schemas.microsoft.com/wbem/wsman/1/wsman.xsd" xml:lang="en-US">
<s:Header>
    <a:Action>http://schemas.dmtf.org/wbem/wsman/1/wsman/fault</a:Action>
    <a:MessageID>uuid:A49FC78A-BAFD-46CE-A0FC-706A7223A4E4</a:MessageID>
    <a:To>http://schemas.xmlsoap.org/ws/2004/08/addressing/role/anonymous</a:To>
    <a:RelatesTo>uuid:880fc38b-d48b-4482-a841-6ba8b65b6164</a:RelatesTo>
</s:Header>
<s:Body>
    <s:Fault>
        <s:Code>
            <s:Value>s:Receiver</s:Value>
            <s:Subcode>
                <s:Value>w:InternalError</s:Value>
            </s:Subcode>
        </s:Code>
        <s:Reason>
            <s:Text xml:lang="en-US">The data is invalid. </s:Text>
        </s:Reason>
        <s:Detail>
            <f:WSManFault xmlns:f="http://schemas.microsoft.com/wbem/wsman/1/wsmanfault" Code="13" Machine="windows-host">
            <f:Message>The data is invalid. </f:Message>
        </f:WSManFault>
    </s:Detail>
</s:Fault>
</s:Body>
</s:Envelope>

[rustyscottweber]

well.. I have been stuck for a while on this and I'm still not sure on how to make stdin work... Any thoughts on implementation?

[megahall]

@rustyscottweber Any update on this item?