public class RLoginClient extends RCommandClient
RCommandClient,
from which it is derived, and uses the rcmd() facility implemented
in RCommandClient to implement the functionality of the rlogin command that
first appeared in 4.2BSD Unix. rlogin is a command used to login to
a remote machine from a trusted host, sometimes without issuing a
password. The trust relationship is the same as described in
the documentation for
RCommandClient.
As with virtually all of the client classes in org.apache.commons.net, this
class derives from SocketClient. But it relies on the connection
methods defined in RcommandClient which ensure that the local Socket
will originate from an acceptable rshell port. The way to use
RLoginClient is to first connect
to the server, call the rlogin() method,
and then
fetch the connection's input and output streams.
Interaction with the remote command is controlled entirely through the
I/O streams. Once you have finished processing the streams, you should
invoke disconnect()
to clean up properly.
The standard output and standard error streams of the
remote process are transmitted over the same connection, readable
from the input stream returned by
getInputStream()
Unlike RExecClient and RCommandClient, it is
not possible to tell the rlogind daemon to return the standard error
stream over a separate connection.
getErrorStream()
will always return null.
The standard input of the remote process can be written to through
the output stream returned by
getOutputSream()
SocketClient,
RExecClient,
RCommandClient| Modifier and Type | Field and Description |
|---|---|
static int |
DEFAULT_PORT
The default rlogin port.
|
MAX_CLIENT_PORT, MIN_CLIENT_PORT_errorStream_, NULL_CHAR_defaultPort_, _hostname_, _input_, _output_, _serverSocketFactory_, _socket_, _socketFactory_, _timeout_, connectTimeout, NETASCII_EOL| Constructor and Description |
|---|
RLoginClient()
The default RLoginClient constructor.
|
| Modifier and Type | Method and Description |
|---|---|
void |
rlogin(String localUsername,
String remoteUsername,
String terminalType)
Same as the other rlogin method, but no terminal speed is defined.
|
void |
rlogin(String localUsername,
String remoteUsername,
String terminalType,
int terminalSpeed)
Logins into a remote machine through the rlogind daemon on the server
to which the RLoginClient is connected.
|
connect, connect, connect, connect, connect, connect, rcommand, rcommanddisconnect, getErrorStream, getInputStream, getOutputStream, isRemoteVerificationEnabled, rexec, rexec, setRemoteVerificationEnabled_connectAction_, addProtocolCommandListener, connect, connect, createCommandSupport, fireCommandSent, fireReplyReceived, getCharset, getCharsetName, getCommandSupport, getConnectTimeout, getDefaultPort, getDefaultTimeout, getKeepAlive, getLocalAddress, getLocalPort, getProxy, getReceiveBufferSize, getRemoteAddress, getRemotePort, getSendBufferSize, getServerSocketFactory, getSoLinger, getSoTimeout, getTcpNoDelay, isAvailable, isConnected, removeProtocolCommandListener, setCharset, setConnectTimeout, setDefaultPort, setDefaultTimeout, setKeepAlive, setProxy, setReceiveBufferSize, setSendBufferSize, setServerSocketFactory, setSocketFactory, setSoLinger, setSoTimeout, setTcpNoDelay, verifyRemotepublic static final int DEFAULT_PORT
public RLoginClient()
DEFAULT_PORT .public void rlogin(String localUsername, String remoteUsername, String terminalType, int terminalSpeed) throws IOException
getInputStream() . Disconnecting
from the server or closing the process streams before reaching
end of file will terminate the remote login shell in most cases.
If user authentication fails, the rlogind daemon will request that a password be entered interactively. You will be able to read the prompt from the output stream of the RLoginClient and write the password to the input stream of the RLoginClient.
localUsername - The user account on the local machine that is
trying to login to the remote host.remoteUsername - The account name on the server that is
being logged in to.terminalType - The name of the user's terminal (e.g., "vt100",
"network", etc.)terminalSpeed - The speed of the user's terminal, expressed
as a baud rate or bps (e.g., 9600 or 38400)IOException - If the rlogin() attempt fails. The exception
will contain a message indicating the nature of the failure.public void rlogin(String localUsername, String remoteUsername, String terminalType) throws IOException
localUsername - the local userremoteUsername - the remote userterminalType - the terminal typeIOException - on errorCopyright © 2001–2017 The Apache Software Foundation. All rights reserved.