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contego / home / tvault / .virtenv / lib / python2.7 / site-packages / paramiko / channel.pyc
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°‹EYc@smdZddlZddlZddlZddlZddlZddlmZddlm	Z	ddl
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Abstraction for an SSH2 channel.
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tcMSG_CHANNEL_REQUESTtcMSG_CHANNEL_WINDOW_ADJUSTtcMSG_CHANNEL_DATAtcMSG_CHANNEL_EXTENDED_DATAtDEBUGtERRORtcMSG_CHANNEL_SUCCESStcMSG_CHANNEL_FAILUREtcMSG_CHANNEL_EOFtcMSG_CHANNEL_CLOSE(tMessage(tbytes_types(tSSHException(tBufferedFile(tBufferedPipetPipeTimeout(tpipe(tClosingContextManagercstˆƒ‡fd†ƒ}|S(s¸
    Decorator for `.Channel` methods which performs an openness check.

    :raises:
        `.SSHException` -- If the wrapped method is called on an unopened
        `.Channel`.
    csD|js%|js%|js%|jr4tdƒ‚nˆ|||ŽS(NsChannel is not open(tclosedteof_receivedteof_senttactiveR(tselftargstkwds(tfunc(sE/home/tvault/.virtenv/lib/python2.7/site-packages/paramiko/channel.pyt_check6s			
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    A secure tunnel across an SSH `.Transport`.  A Channel is meant to behave
    like a socket, and has an API that should be indistinguishable from the
    Python socket API.

    Because SSH2 has a windowing kind of flow control, if you stop reading data
    from a Channel and its buffer fills up, the server will be unable to send
    you any more data until you read some of it.  (This won't affect other
    channels on the same transport -- all channels on a single transport are
    flow-controlled independently.)  Similarly, if the server isn't reading
    data you send, calls to `send` may block, unless you set a timeout.  This
    is exactly like a normal network socket, so it shouldn't be too surprising.

    Instances of this class may be used as context managers.
    cCs3||_d|_d|_t|_d|_d|_tƒ|_	tƒ|_
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tjƒ|_tj|jƒ|_d|_d|_d|_d|_d|_d|_tjƒ|_t|ƒ|_tjdƒ|_d|_ tjƒ|_!t|_"t|_#d|_$d|_%dS(sm
        Create a new channel.  The channel is not associated with any
        particular session or `.Transport` until the Transport attaches it.
        Normally you would only call this method from the constructor of a
        subclass of `.Channel`.

        :param int chanid:
            the ID of this channel, as passed by an existing `.Transport`.
        isparamiko.transportiÿÿÿÿN(&tchanidt
remote_chanidtNonet	transporttFalseRRRRt	in_buffertin_stderr_bufferttimeoutRtultra_debugt	threadingtLocktlockt	Conditiont
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        Return a string representation of this object, for debugging.
        s<paramiko.Channel %ds	 (closed)s (EOF received)s (EOF sent)s (open) window=%dis
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RRRRRR.tlenR$treprR"(Rtout((sE/home/tvault/.virtenv/lib/python2.7/site-packages/paramiko/channel.pyt__repr__†s
	
		
	
 
tvt100iPiicCs¹tƒ}|jtƒ|j|jƒ|jdƒ|jtƒ|j|ƒ|j|ƒ|j|ƒ|j|ƒ|j|ƒ|jtƒƒ|j	ƒ|j
j|ƒ|jƒdS(sk
        Request a pseudo-terminal from the server.  This is usually used right
        after creating a client channel, to ask the server to provide some
        basic terminal semantics for a shell invoked with `invoke_shell`.
        It isn't necessary (or desirable) to call this method if you're going
        to execute a single command with `exec_command`.

        :param str term: the terminal type to emulate
            (for example, ``'vt100'``)
        :param int width: width (in characters) of the terminal screen
        :param int height: height (in characters) of the terminal screen
        :param int width_pixels: width (in pixels) of the terminal screen
        :param int height_pixels: height (in pixels) of the terminal screen

        :raises:
            `.SSHException` -- if the request was rejected or the channel was
            closed
        spty-reqN(
Rtadd_byteRtadd_intR t
add_stringtadd_booleantTruetbytest_event_pendingR"t_send_user_messaget_wait_for_event(Rttermtwidththeighttwidth_pixelst
height_pixelstm((sE/home/tvault/.virtenv/lib/python2.7/site-packages/paramiko/channel.pytget_pty™s	








cCshtƒ}|jtƒ|j|jƒ|jdƒ|jtƒ|jƒ|j	j
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        Request an interactive shell session on this channel.  If the server
        allows it, the channel will then be directly connected to the stdin,
        stdout, and stderr of the shell.

        Normally you would call `get_pty` before this, in which case the
        shell will operate through the pty, and the channel will be connected
        to the stdin and stdout of the pty.

        When the shell exits, the channel will be closed and can't be reused.
        You must open a new channel if you wish to open another shell.

        :raises:
            `.SSHException` -- if the request was rejected or the channel was
            closed
        tshellN(RRHRRIR RJRKRLRNR"RORP(RRV((sE/home/tvault/.virtenv/lib/python2.7/site-packages/paramiko/channel.pytinvoke_shell½s	



cCsutƒ}|jtƒ|j|jƒ|jdƒ|jtƒ|j|ƒ|jƒ|j	j
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        Execute a command on the server.  If the server allows it, the channel
        will then be directly connected to the stdin, stdout, and stderr of
        the command being executed.

        When the command finishes executing, the channel will be closed and
        can't be reused.  You must open a new channel if you wish to execute
        another command.

        :param str command: a shell command to execute.

        :raises:
            `.SSHException` -- if the request was rejected or the channel was
            closed
        texecN(RRHRRIR RJRKRLRNR"RORP(RtcommandRV((sE/home/tvault/.virtenv/lib/python2.7/site-packages/paramiko/channel.pytexec_commandØs	




cCsutƒ}|jtƒ|j|jƒ|jdƒ|jtƒ|j|ƒ|jƒ|j	j
|ƒ|jƒdS(sÕ
        Request a subsystem on the server (for example, ``sftp``).  If the
        server allows it, the channel will then be directly connected to the
        requested subsystem.

        When the subsystem finishes, the channel will be closed and can't be
        reused.

        :param str subsystem: name of the subsystem being requested.

        :raises:
            `.SSHException` -- if the request was rejected or the channel was
            closed
        t	subsystemN(RRHRRIR RJRKRLRNR"RORP(RR]RV((sE/home/tvault/.virtenv/lib/python2.7/site-packages/paramiko/channel.pytinvoke_subsystemós	




cCsˆtƒ}|jtƒ|j|jƒ|jdƒ|jtƒ|j|ƒ|j|ƒ|j|ƒ|j|ƒ|jj	|ƒdS(sP
        Resize the pseudo-terminal.  This can be used to change the width and
        height of the terminal emulation created in a previous `get_pty` call.

        :param int width: new width (in characters) of the terminal screen
        :param int height: new height (in characters) of the terminal screen
        :param int width_pixels: new width (in pixels) of the terminal screen
        :param int height_pixels: new height (in pixels) of the terminal screen

        :raises:
            `.SSHException` -- if the request was rejected or the channel was
            closed
        s
window-changeN(
RRHRRIR RJRKR#R"RO(RRRRSRTRURV((sE/home/tvault/.virtenv/lib/python2.7/site-packages/paramiko/channel.pyt
resize_pty
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cCsixb|jƒD]T\}}y|j||ƒWq
tk
r`}d}t|j|ƒ|ƒ‚q
Xq
WdS(s†
        Updates this channel's remote shell environment.

        .. note::
            This operation is additive - i.e. the current environment is not
            reset before the given environment variables are set.

        .. warning::
            Servers may silently reject some environment variables; see the
            warning in `set_environment_variable` for details.

        :param dict environment:
            a dictionary containing the name and respective values to set
        :raises:
            `.SSHException` -- if any of the environment variables was rejected
            by the server or the channel was closed
        s)Failed to set environment variable "{0}".N(titemstset_environment_variableRtformat(Rtenvironmenttnametvalueteterr((sE/home/tvault/.virtenv/lib/python2.7/site-packages/paramiko/channel.pytupdate_environment'scCsntƒ}|jtƒ|j|jƒ|jdƒ|jtƒ|j|ƒ|j|ƒ|jj	|ƒdS(s`
        Set the value of an environment variable.

        .. warning::
            The server may reject this request depending on its ``AcceptEnv``
            setting; such rejections will fail silently (which is common client
            practice for this particular request type). Make sure you
            understand your server's configuration before using!

        :param str name: name of the environment variable
        :param str value: value of the environment variable

        :raises:
            `.SSHException` -- if the request was rejected or the channel was
            closed
        tenvN(
RRHRRIR RJRKR#R"RO(RRdReRV((sE/home/tvault/.virtenv/lib/python2.7/site-packages/paramiko/channel.pyRaAs	




cCs|jp|jjƒS(s¹
        Return true if the remote process has exited and returned an exit
        status. You may use this to poll the process status if you don't
        want to block in `recv_exit_status`. Note that the server may not
        return an exit status in some cases (like bad servers).

        :return:
            ``True`` if `recv_exit_status` will return immediately, else
            ``False``.

        .. versionadded:: 1.7.3
        (RR4tis_set(R((sE/home/tvault/.virtenv/lib/python2.7/site-packages/paramiko/channel.pytexit_status_ready\s
cCs)|jjƒ|jjƒs"t‚|jS(s3
        Return the exit status from the process on the server.  This is
        mostly useful for retrieving the results of an `exec_command`.
        If the command hasn't finished yet, this method will wait until
        it does, or until the channel is closed.  If no exit status is
        provided by the server, -1 is returned.

        .. warning::
            In some situations, receiving remote output larger than the current
            `.Transport` or session's ``window_size`` (e.g. that set by the
            ``default_window_size`` kwarg for `.Transport.__init__`) will cause
            `.recv_exit_status` to hang indefinitely if it is called prior to a
            sufficiently large `.Channel.recv` (or if there are no threads
            calling `.Channel.recv` in the background).

            In these cases, ensuring that `.recv_exit_status` is called *after*
            `.Channel.recv` (or, again, using threads) can avoid the hang.

        :return: the exit code (as an `int`) of the process on the server.

        .. versionadded:: 1.2
        (R4twaitRjtAssertionErrorR=(R((sE/home/tvault/.virtenv/lib/python2.7/site-packages/paramiko/channel.pytrecv_exit_statusks
cCsatƒ}|jtƒ|j|jƒ|jdƒ|jtƒ|j|ƒ|jj	|ƒdS(sS
        Send the exit status of an executed command to the client.  (This
        really only makes sense in server mode.)  Many clients expect to
        get some sort of status code back from an executed command after
        it completes.

        :param int status: the exit code of the process

        .. versionadded:: 1.2
        sexit-statusN(
RRHRRIR RJRKR#R"RO(RtstatusRV((sE/home/tvault/.virtenv/lib/python2.7/site-packages/paramiko/channel.pytsend_exit_status†s
	



cCsè|dkrd}n|dkr<tjtjdƒƒ}ntƒ}|jtƒ|j|j	ƒ|j
dƒ|jtƒ|j|ƒ|j
|ƒ|j
|ƒ|j|ƒ|j
ƒ|jj|ƒ|jƒ|jj|ƒ|S(sM
        Request an x11 session on this channel.  If the server allows it,
        further x11 requests can be made from the server to the client,
        when an x11 application is run in a shell session.

        From :rfc:`4254`::

            It is RECOMMENDED that the 'x11 authentication cookie' that is
            sent be a fake, random cookie, and that the cookie be checked and
            replaced by the real cookie when a connection request is received.

        If you omit the auth_cookie, a new secure random 128-bit value will be
        generated, used, and returned.  You will need to use this value to
        verify incoming x11 requests and replace them with the actual local
        x11 cookie (which requires some knowledge of the x11 protocol).

        If a handler is passed in, the handler is called from another thread
        whenever a new x11 connection arrives.  The default handler queues up
        incoming x11 connections, which may be retrieved using
        `.Transport.accept`.  The handler's calling signature is::

            handler(channel: Channel, (address: str, port: int))

        :param int screen_number: the x11 screen number (0, 10, etc.)
        :param str auth_protocol:
            the name of the X11 authentication method used; if none is given,
            ``"MIT-MAGIC-COOKIE-1"`` is used
        :param str auth_cookie:
            hexadecimal string containing the x11 auth cookie; if none is
            given, a secure random 128-bit value is generated
        :param bool single_connection:
            if True, only a single x11 connection will be forwarded (by
            default, any number of x11 connections can arrive over this
            session)
        :param handler:
            an optional callable handler to use for incoming X11 connections
        :return: the auth_cookie used
        sMIT-MAGIC-COOKIE-1isx11-reqN(R!tbinasciithexlifytosturandomRRHRRIR RJRKRLRNR"RORPt_set_x11_handler(Rt
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auth_protocoltauth_cookietsingle_connectionthandlerRV((sE/home/tvault/.virtenv/lib/python2.7/site-packages/paramiko/channel.pytrequest_x11›s$/		








cCsdtƒ}|jtƒ|j|jƒ|jdƒ|jtƒ|jj	|ƒ|jj
|ƒtS(s
        Request for a forward SSH Agent on this channel.
        This is only valid for an ssh-agent from OpenSSH !!!

        :param handler:
            a required callable handler to use for incoming SSH Agent
            connections

        :return: True if we are ok, else False
            (at that time we always return ok)

        :raises: SSHException in case of channel problem.
        sauth-agent-req@openssh.com(RRHRRIR RJRKR#R"ROt_set_forward_agent_handlerRL(RRzRV((sE/home/tvault/.virtenv/lib/python2.7/site-packages/paramiko/channel.pytrequest_forward_agentÞs	


cCs|jS(sG
        Return the `.Transport` associated with this channel.
        (R"(R((sE/home/tvault/.virtenv/lib/python2.7/site-packages/paramiko/channel.pyt
get_transportöscCs
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        Set a name for this channel.  Currently it's only used to set the name
        of the channel in logfile entries.  The name can be fetched with the
        `get_name` method.

        :param str name: new channel name
        N(R6(RRd((sE/home/tvault/.virtenv/lib/python2.7/site-packages/paramiko/channel.pytset_nameüscCs|jS(sU
        Get the name of this channel that was previously set by `set_name`.
        (R6(R((sE/home/tvault/.virtenv/lib/python2.7/site-packages/paramiko/channel.pytget_namescCs|jS(s3
        Return the `int` ID # for this channel.

        The channel ID is unique across a `.Transport` and usually a small
        number.  It's also the number passed to
        `.ServerInterface.check_channel_request` when determining whether to
        accept a channel request in server mode.
        (R(R((sE/home/tvault/.virtenv/lib/python2.7/site-packages/paramiko/channel.pytget_ids	cCs‚tƒ}|jjƒz5|j}||_|rJ|rJ|jjƒ}nWd|jjƒXt|ƒdkr~|j|ƒn|S(s
        Set whether stderr should be combined into stdout on this channel.
        The default is ``False``, but in some cases it may be convenient to
        have both streams combined.

        If this is ``False``, and `exec_command` is called (or ``invoke_shell``
        with no pty), output to stderr will not show up through the `recv`
        and `recv_ready` calls.  You will have to use `recv_stderr` and
        `recv_stderr_ready` to get stderr output.

        If this is ``True``, data will never show up via `recv_stderr` or
        `recv_stderr_ready`.

        :param bool combine:
            ``True`` if stderr output should be combined into stdout on this
            channel.
        :return: the previous setting (a `bool`).

        .. versionadded:: 1.1
        Ni(	RMR*tacquireR<R%temptytreleaseRCt_feed(Rtcombinetdatatold((sE/home/tvault/.virtenv/lib/python2.7/site-packages/paramiko/channel.pytset_combine_stderrs	
		
cCs
||_dS(sñ
        Set a timeout on blocking read/write operations.  The ``timeout``
        argument can be a nonnegative float expressing seconds, or ``None``.
        If a float is given, subsequent channel read/write operations will
        raise a timeout exception if the timeout period value has elapsed
        before the operation has completed.  Setting a timeout of ``None``
        disables timeouts on socket operations.

        ``chan.settimeout(0.0)`` is equivalent to ``chan.setblocking(0)``;
        ``chan.settimeout(None)`` is equivalent to ``chan.setblocking(1)``.

        :param float timeout:
            seconds to wait for a pending read/write operation before raising
            ``socket.timeout``, or ``None`` for no timeout.
        N(R&(RR&((sE/home/tvault/.virtenv/lib/python2.7/site-packages/paramiko/channel.pyt
settimeout<scCs|jS(sÑ
        Returns the timeout in seconds (as a float) associated with socket
        operations, or ``None`` if no timeout is set.  This reflects the last
        call to `setblocking` or `settimeout`.
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gettimeoutNscCs'|r|jdƒn
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        Set blocking or non-blocking mode of the channel: if ``blocking`` is 0,
        the channel is set to non-blocking mode; otherwise it's set to blocking
        mode. Initially all channels are in blocking mode.

        In non-blocking mode, if a `recv` call doesn't find any data, or if a
        `send` call can't immediately dispose of the data, an error exception
        is raised. In blocking mode, the calls block until they can proceed. An
        EOF condition is considered "immediate data" for `recv`, so if the
        channel is closed in the read direction, it will never block.

        ``chan.setblocking(0)`` is equivalent to ``chan.settimeout(0)``;
        ``chan.setblocking(1)`` is equivalent to ``chan.settimeout(None)``.

        :param int blocking:
            0 to set non-blocking mode; non-0 to set blocking mode.
        gN(RŠR!(Rtblocking((sE/home/tvault/.virtenv/lib/python2.7/site-packages/paramiko/channel.pytsetblockingVscCs
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        Return the address of the remote side of this Channel, if possible.

        This simply wraps `.Transport.getpeername`, used to provide enough of a
        socket-like interface to allow asyncore to work. (asyncore likes to
        call ``'getpeername'``.)
        (R"tgetpeername(R((sE/home/tvault/.virtenv/lib/python2.7/site-packages/paramiko/channel.pyRŽmscCs¡|jjƒzO|jdk	r8|jjƒd|_n|jsK|jrOdS|jƒ}Wd|jjƒXx-|D]%}|dk	rt|j	j
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        Close the channel.  All future read/write operations on the channel
        will fail.  The remote end will receive no more data (after queued data
        is flushed).  Channels are automatically closed when their `.Transport`
        is closed or when they are garbage collected.
        N(R*R‚R9R!R@RRt_close_internalR„R"RO(RtmsgsRV((sE/home/tvault/.virtenv/lib/python2.7/site-packages/paramiko/channel.pyR@ws


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        Returns true if data is buffered and ready to be read from this
        channel.  A ``False`` result does not mean that the channel has closed;
        it means you may need to wait before more data arrives.

        :return:
            ``True`` if a `recv` call on this channel would immediately return
            at least one byte; ``False`` otherwise.
        (R$t
read_ready(R((sE/home/tvault/.virtenv/lib/python2.7/site-packages/paramiko/channel.pyt
recv_ready‘s
cCs§y|jj||jƒ}Wntk
r;tjƒ‚nX|jt|ƒƒ}|dkr£tƒ}|jt	ƒ|j
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        Receive data from the channel.  The return value is a string
        representing the data received.  The maximum amount of data to be
        received at once is specified by ``nbytes``.  If a string of
        length zero is returned, the channel stream has closed.

        :param int nbytes: maximum number of bytes to read.
        :return: received data, as a ``str``/``bytes``.

        :raises socket.timeout:
            if no data is ready before the timeout set by `settimeout`.
        i(R$treadR&Rtsockett_check_add_windowRCRRHRRIR R"RO(RtnbytesREtackRV((sE/home/tvault/.virtenv/lib/python2.7/site-packages/paramiko/channel.pytrecvs

	

cCs
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        Returns true if data is buffered and ready to be read from this
        channel's stderr stream.  Only channels using `exec_command` or
        `invoke_shell` without a pty will ever have data on the stderr
        stream.

        :return:
            ``True`` if a `recv_stderr` call on this channel would immediately
            return at least one byte; ``False`` otherwise.

        .. versionadded:: 1.1
        (R%R‘(R((sE/home/tvault/.virtenv/lib/python2.7/site-packages/paramiko/channel.pytrecv_stderr_readyºs
cCs§y|jj||jƒ}Wntk
r;tjƒ‚nX|jt|ƒƒ}|dkr£tƒ}|jt	ƒ|j
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        Receive data from the channel's stderr stream.  Only channels using
        `exec_command` or `invoke_shell` without a pty will ever have data
        on the stderr stream.  The return value is a string representing the
        data received.  The maximum amount of data to be received at once is
        specified by ``nbytes``.  If a string of length zero is returned, the
        channel stream has closed.

        :param int nbytes: maximum number of bytes to read.
        :return: received data as a `str`

        :raises socket.timeout: if no data is ready before the timeout set by
            `settimeout`.

        .. versionadded:: 1.1
        i(R%R“R&RR”R•RCRRHRRIR R"RO(RR–RER—RV((sE/home/tvault/.virtenv/lib/python2.7/site-packages/paramiko/channel.pytrecv_stderrÉs
	

cCsI|jjƒz'|js"|jr&tS|jdkSWd|jjƒXdS(s#
        Returns true if data can be written to this channel without blocking.
        This means the channel is either closed (so any write attempt would
        return immediately) or there is at least one byte of space in the
        outbound buffer. If there is at least one byte of space in the
        outbound buffer, a `send` call will succeed immediately and return
        the number of bytes actually written.

        :return:
            ``True`` if a `send` call on this channel would immediately succeed
            or fail
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