UV[c @ s
d Z d d k Z d d k Z d d k Z d d k Z d d k Z d d k Z d d k Td d k l Z d d k
l Z d d k l
Z
d d k l Z d d k l Z l Z d d k l Z d
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Abstraction for an SSH2 channel.
iN( t *( t util( t Message( t SSHException( t BufferedFile( t BufferedPipet PipeTimeout( t pipei t Channelc B s- e Z d Z d Z d Z d Z d d d d Z d Z d Z d
Z d d d Z
d Z d
Z d Z
d d> d> e d> d Z d Z d Z d Z d Z d Z d Z d Z d Z d Z d Z d Z d Z d Z d Z d Z d Z d! Z! d" Z" d# Z# d$ Z$ d% Z% d& Z& d' Z' d( Z( d) Z) d* Z* d+ Z+ d, Z, d- Z- d. Z. d/ Z/ d0 Z0 d1 Z1 d2 Z2 d3 Z3 d4 Z4 d5 Z5 d6 Z6 d7 Z7 d8 Z8 d9 Z9 d: Z: d; Z; d< Z< d= Z= RS(? s
A secure tunnel across an SSH L{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 L{send} may block, unless you set a timeout. This
is exactly like a normal network socket, so it shouldn't be too surprising.
c C s3 | | _ d | _ d | _ t | _ d | _ d | _ t | _ t | _
d | _ t | _ t | _
t i | _ t i | i | _ d | _ d | _ d | _ d | _ d | _ d | _ t i | _ t | | _ t i d | _ d | _ t i | _! t | _" t | _# d | _$ d | _% d S( s
Create a new channel. The channel is not associated with any
particular session or L{Transport} until the Transport attaches it.
Normally you would only call this method from the constructor of a
subclass of L{Channel}.
@param chanid: the ID of this channel, as passed by an existing
L{Transport}.
@type chanid: int
i s paramiko.transportiN(& t chanidt
remote_chanidt Nonet transportt Falset activet eof_receivedt eof_sentR t in_buffert in_stderr_buffert timeoutt closedt ultra_debugt threadingt Lockt lockt Conditiont
out_buffer_cvt in_window_sizet out_window_sizet in_max_packet_sizet out_max_packet_sizet in_window_thresholdt in_window_sofart Eventt status_eventt strt _nameR t
get_loggert loggert _pipet eventt event_readyt combine_stderrt exit_statust origin_addr( t selfR ( ( s4 /usr/lib/python2.6/site-packages/paramiko/channel.pyt __init__: s8 c C s y | i Wn n Xd S( N( t close( R- ( ( s4 /usr/lib/python2.6/site-packages/paramiko/channel.pyt __del__b s c C s d | i } | i o | d 7} n | i oy | i o | d 7} n | i o | d 7} n | d | i 7} t | i d j o | d t | i f 7} q n | d t | i 7} | d 7} | S(
sd
Return a string representation of this object, for debugging.
@rtype: str
s t >(
R R R R R R t lenR t reprR ( R- t out( ( s4 /usr/lib/python2.6/site-packages/paramiko/channel.pyt __repr__h s
"
t vt100iP i c C s | i p | i p | i p | i o t d n t } | i t t | i | i
| i d | i t
| i | | i | | i | | i d i d | i d | i | i i | | i d S( s
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 L{invoke_shell}.
It isn't necessary (or desirable) to call this method if you're going
to exectue a single command with L{exec_command}.
@param term: the terminal type to emulate (for example, C{'vt100'})
@type term: str
@param width: width (in characters) of the terminal screen
@type width: int
@param height: height (in characters) of the terminal screen
@type height: int
@raise SSHException: if the request was rejected or the channel was
closed
s Channel is not opens pty-reqi t N( R R R R R R t add_bytet chrt MSG_CHANNEL_REQUESTt add_intR
t
add_stringt add_booleant Truet _event_pendingR t _send_user_messaget _wait_for_event( R- t termt widtht heightt m( ( s4 /usr/lib/python2.6/site-packages/paramiko/channel.pyt get_pty} s )
c C s | i p | i p | i p | i o t d n t } | i t t | i | i
| i d | i d | i
| i i | | i d S( s
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 L{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.
@raise SSHException: if the request was rejected or the channel was
closed
s Channel is not opent shelli N( R R R R R R R8 R9 R: R; R
R< R= R? R R@ RA ( R- RE ( ( s4 /usr/lib/python2.6/site-packages/paramiko/channel.pyt invoke_shell s )
c C s | i p | i p | i p | i o t d n t } | i t t | i | i
| i d | i t
| i | | i | i i | | i d S( s3
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 command: a shell command to execute.
@type command: str
@raise SSHException: if the request was rejected or the channel was
closed
s Channel is not opent execN( R R R R R R R8 R9 R: R; R
R< R= R> R? R R@ RA ( R- t commandRE ( ( s4 /usr/lib/python2.6/site-packages/paramiko/channel.pyt exec_command s )
c C s | i p | i p | i p | i o t d n t } | i t t | i | i
| i d | i t
| i | | i | i i | | i d S( s
Request a subsystem on the server (for example, C{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 subsystem: name of the subsystem being requested.
@type subsystem: str
@raise SSHException: if the request was rejected or the channel was
closed
s Channel is not opent subsystemN( R R R R R R R8 R9 R: R; R
R< R= R> R? R R@ RA ( R- RL RE ( ( s4 /usr/lib/python2.6/site-packages/paramiko/channel.pyt invoke_subsystem s )
c C s | i p | i p | i p | i o t d n t } | i t t | i | i
| i d | i t
| i | | i | | i d i d | i | i i | | i d S( s
Resize the pseudo-terminal. This can be used to change the width and
height of the terminal emulation created in a previous L{get_pty} call.
@param width: new width (in characters) of the terminal screen
@type width: int
@param height: new height (in characters) of the terminal screen
@type height: int
@raise SSHException: if the request was rejected or the channel was
closed
s Channel is not opens
window-changei N( R R R R R R R8 R9 R: R; R
R< R= R> R? R R@ RA ( R- RC RD RE ( ( s4 /usr/lib/python2.6/site-packages/paramiko/channel.pyt
resize_pty s
)
c C s | i p
| i i S( s
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 L{recv_exit_status}. Note that the server may not
return an exit status in some cases (like bad servers).
@return: True if L{recv_exit_status} will return immediately
@rtype: bool
@since: 1.7.3
( R R" t isSet( R- ( ( s4 /usr/lib/python2.6/site-packages/paramiko/channel.pyt exit_status_ready
s c C s | i i | i S( s
Return the exit status from the process on the server. This is
mostly useful for retrieving the reults of an L{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.
@return: the exit code of the process on the server.
@rtype: int
@since: 1.2
( R" t waitR+ ( R- ( ( s4 /usr/lib/python2.6/site-packages/paramiko/channel.pyt recv_exit_status s
c C sg t } | i t t | i | i | i d | i t | i | | i i
| d S( so
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 status: the exit code of the process
@type status: int
@since: 1.2
s exit-statusN( R R8 R9 R: R; R
R< R= R
R R@ ( R- t statusRE ( ( s4 /usr/lib/python2.6/site-packages/paramiko/channel.pyt send_exit_status+ s
i c C s1 | i p | i p | i p | i o t d n | d j o
d } n | d j o" t i | i i i
d } n t } | i t
t | i | i | i d | i t | i | | i | | i | | i | | i | i i | | i | i i | | S( s
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 RFC4254::
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 knoweldge 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
L{Transport.accept}. The handler's calling signature is::
handler(channel: Channel, (address: str, port: int))
@param screen_number: the x11 screen number (0, 10, etc)
@type screen_number: int
@param auth_protocol: the name of the X11 authentication method used;
if none is given, C{"MIT-MAGIC-COOKIE-1"} is used
@type auth_protocol: str
@param auth_cookie: hexadecimal string containing the x11 auth cookie;
if none is given, a secure random 128-bit value is generated
@type auth_cookie: str
@param single_connection: if True, only a single x11 connection will be
forwarded (by default, any number of x11 connections can arrive
over this session)
@type single_connection: bool
@param handler: an optional handler to use for incoming X11 connections
@type handler: function
@return: the auth_cookie used
s Channel is not opens MIT-MAGIC-COOKIE-1i s x11-reqN( R R R R R R t binasciit hexlifyR t randpoolt get_bytesR R8 R9 R: R; R
R< R= R> R? R@ RA t _set_x11_handler( R- t
screen_numbert
auth_protocolt auth_cookiet single_connectiont handlerRE ( ( s4 /usr/lib/python2.6/site-packages/paramiko/channel.pyt request_x11A s( ))
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c C s | i S( s
Return the L{Transport} associated with this channel.
@return: the L{Transport} that was used to create this channel.
@rtype: L{Transport}
( R ( R- ( ( s4 /usr/lib/python2.6/site-packages/paramiko/channel.pyt
get_transport s c C s
| | _ d S( s
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
L{get_name} method.
@param name: new channel name
@type name: str
N( R$ ( R- t name( ( s4 /usr/lib/python2.6/site-packages/paramiko/channel.pyt set_name s c C s | i S( s
Get the name of this channel that was previously set by L{set_name}.
@return: the name of this channel.
@rtype: str
( R$ ( R- ( ( s4 /usr/lib/python2.6/site-packages/paramiko/channel.pyt get_name s c C s | i S( sc
Return the ID # for this channel. The channel ID is unique across
a L{Transport} and usually a small number. It's also the number
passed to L{ServerInterface.check_channel_request} when determining
whether to accept a channel request in server mode.
@return: the ID of this channel.
@rtype: int
( R ( R- ( ( s4 /usr/lib/python2.6/site-packages/paramiko/channel.pyt get_id s
c C s d } | i i z8 | i } | | _ | o | o | i i } n Wd | i i Xt | d j o | i | n | S( s<
Set whether stderr should be combined into stdout on this channel.
The default is C{False}, but in some cases it may be convenient to
have both streams combined.
If this is C{False}, and L{exec_command} is called (or C{invoke_shell}
with no pty), output to stderr will not show up through the L{recv}
and L{recv_ready} calls. You will have to use L{recv_stderr} and
L{recv_stderr_ready} to get stderr output.
If this is C{True}, data will never show up via L{recv_stderr} or
L{recv_stderr_ready}.
@param combine: C{True} if stderr output should be combined into
stdout on this channel.
@type combine: bool
@return: previous setting.
@rtype: bool
@since: 1.1
R7 Ni ( R t acquireR* R t emptyt releaseR2 t _feed( R- t combinet datat old( ( s4 /usr/lib/python2.6/site-packages/paramiko/channel.pyt set_combine_stderr s
c C s
| | _ d S( s
Set a timeout on blocking read/write operations. The C{timeout}
argument can be a nonnegative float expressing seconds, or C{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 C{None} disables
timeouts on socket operations.
C{chan.settimeout(0.0)} is equivalent to C{chan.setblocking(0)};
C{chan.settimeout(None)} is equivalent to C{chan.setblocking(1)}.
@param timeout: seconds to wait for a pending read/write operation
before raising C{socket.timeout}, or C{None} for no timeout.
@type timeout: float
N( R ( R- R ( ( s4 /usr/lib/python2.6/site-packages/paramiko/channel.pyt
settimeout s c C s | i S( s
Returns the timeout in seconds (as a float) associated with socket
operations, or C{None} if no timeout is set. This reflects the last
call to L{setblocking} or L{settimeout}.
@return: timeout in seconds, or C{None}.
@rtype: float
( R ( R- ( ( s4 /usr/lib/python2.6/site-packages/paramiko/channel.pyt
gettimeout s c C s) | o | i d n | i d d S( sp
Set blocking or non-blocking mode of the channel: if C{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 L{recv} call doesn't find any data, or if a
L{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 L{recv}, so if the
channel is closed in the read direction, it will never block.
C{chan.setblocking(0)} is equivalent to C{chan.settimeout(0)};
C{chan.setblocking(1)} is equivalent to C{chan.settimeout(None)}.
@param blocking: 0 to set non-blocking mode; non-0 to set blocking
mode.
@type blocking: int
g N( Rm R ( R- t blocking( ( s4 /usr/lib/python2.6/site-packages/paramiko/channel.pyt setblocking s c C s
| i i S( s
Return the address of the remote side of this Channel, if possible.
This is just a wrapper around C{'getpeername'} on the Transport, used
to provide enough of a socket-like interface to allow asyncore to work.
(asyncore likes to call C{'getpeername'}.)
@return: the address if the remote host, if known
@rtype: tuple(str, int)
( R t getpeername( R- ( ( s4 /usr/lib/python2.6/site-packages/paramiko/channel.pyRq s
c C s | i i zT | i d j o | i i d | _ n | i p
| i o d S| i } Wd | i i Xx/ | D]' } | d j o | i i
| qy qy Wd S( s+
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 L{Transport}
is closed or when they are garbage collected.
N( R Re R' R R/ R R t _close_internalRg R R@ ( R- t msgsRE ( ( s4 /usr/lib/python2.6/site-packages/paramiko/channel.pyR/ s
c C s
| i i S( s
Returns true if data is buffered and ready to be read from this
channel. A C{False} result does not mean that the channel has closed;
it means you may need to wait before more data arrives.
@return: C{True} if a L{recv} call on this channel would immediately
return at least one byte; C{False} otherwise.
@rtype: boolean
( R t
read_ready( R- ( ( s4 /usr/lib/python2.6/site-packages/paramiko/channel.pyt
recv_ready, s
c C s y | i i | | i } Wn! t j
o } t i n X| i t | } | d j oM t } | i t t
| i | i | i | | i
i | n | S( s
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 C{nbytes}. If a string of length zero
is returned, the channel stream has closed.
@param nbytes: maximum number of bytes to read.
@type nbytes: int
@return: data.
@rtype: str
@raise socket.timeout: if no data is ready before the timeout set by
L{settimeout}.
i ( R t readR R t sockett _check_add_windowR2 R R8 R9 t MSG_CHANNEL_WINDOW_ADJUSTR; R
R R@ ( R- t nbytesR4 t et ackRE ( ( s4 /usr/lib/python2.6/site-packages/paramiko/channel.pyt recv8 s
c C s
| i i S( s
Returns true if data is buffered and ready to be read from this
channel's stderr stream. Only channels using L{exec_command} or
L{invoke_shell} without a pty will ever have data on the stderr
stream.
@return: C{True} if a L{recv_stderr} call on this channel would
immediately return at least one byte; C{False} otherwise.
@rtype: boolean
@since: 1.1
( R Rt ( R- ( ( s4 /usr/lib/python2.6/site-packages/paramiko/channel.pyt recv_stderr_readyW s
c C s y | i i | | i } Wn! t j
o } t i n X| i t | } | d j oM t } | i t t
| i | i | i | | i
i | n | S( s
Receive data from the channel's stderr stream. Only channels using
L{exec_command} or L{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 C{nbytes}. If a string of length zero is returned, the
channel stream has closed.
@param nbytes: maximum number of bytes to read.
@type nbytes: int
@return: data.
@rtype: str
@raise socket.timeout: if no data is ready before the timeout set by
L{settimeout}.
@since: 1.1
i ( R Rv R R Rw Rx R2 R R8 R9 Ry R; R
R R@ ( R- Rz R4 R{ R| RE ( ( s4 /usr/lib/python2.6/site-packages/paramiko/channel.pyt recv_stderrf s
c C sL | i i z* | i p
| i o t S| i d j SWd | i i Xd S( s9
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 L{send} call will succeed immediately and return
the number of bytes actually written.
@return: C{True} if a L{send} call on this channel would immediately
succeed or fail
@rtype: boolean
i N( R Re R R R> R Rg ( R- ( ( s4 /usr/lib/python2.6/site-packages/paramiko/channel.pyt
send_ready s
c C s t | } | i i zb | i | } | d j o d St } | i t t | i | i | i
| | Wd | i i X| i i
| | S( s-
Send data to the channel. Returns the number of bytes sent, or 0 if
the channel stream is closed. Applications are responsible for
checking that all data has been sent: if only some of the data was
transmitted, the application needs to attempt delivery of the remaining
data.
@param s: data to send
@type s: str
@return: number of bytes actually sent
@rtype: int
@raise socket.timeout: if no data could be sent before the timeout set
by L{settimeout}.
i N( R2 R Re t _wait_for_send_windowR R8 R9 t MSG_CHANNEL_DATAR; R
R< Rg R R@ ( R- t st sizeRE ( ( s4 /usr/lib/python2.6/site-packages/paramiko/channel.pyt send s
c C s t | } | i i zo | i | } | d j o d St } | i t t | i | i | i d | i
| | Wd | i i X| i i
| | S( s
Send data to the channel on the "stderr" stream. This is normally
only used by servers to send output from shell commands -- clients
won't use this. Returns the number of bytes sent, or 0 if the channel
stream is closed. Applications are responsible for checking that all
data has been sent: if only some of the data was transmitted, the
application needs to attempt delivery of the remaining data.
@param s: data to send.
@type s: str
@return: number of bytes actually sent.
@rtype: int
@raise socket.timeout: if no data could be sent before the timeout set
by L{settimeout}.
@since: 1.1
i i N( R2 R Re R R R8 R9 t MSG_CHANNEL_EXTENDED_DATAR; R
R< Rg R R@ ( R- R R RE ( ( s4 /usr/lib/python2.6/site-packages/paramiko/channel.pyt send_stderr s
c C sI xB | o: | i o t i d n | i | } | | } q Wd S( s
Send data to the channel, without allowing partial results. Unlike
L{send}, this method continues to send data from the given string until
either all data has been sent or an error occurs. Nothing is returned.
@param s: data to send.
@type s: str
@raise socket.timeout: if sending stalled for longer than the timeout
set by L{settimeout}.
@raise socket.error: if an error occured before the entire string was
sent.
@note: If the channel is closed while only part of the data hase been
sent, there is no way to determine how much data (if any) was sent.
This is irritating, but identically follows python's API.
s Socket is closedN( R Rw t errorR R ( R- R t sent( ( s4 /usr/lib/python2.6/site-packages/paramiko/channel.pyt sendall s
c C sI xB | o: | i o t i d n | i | } | | } q Wd S( sg
Send data to the channel's "stderr" stream, without allowing partial
results. Unlike L{send_stderr}, this method continues to send data
from the given string until all data has been sent or an error occurs.
Nothing is returned.
@param s: data to send to the client as "stderr" output.
@type s: str
@raise socket.timeout: if sending stalled for longer than the timeout
set by L{settimeout}.
@raise socket.error: if an error occured before the entire string was
sent.
@since: 1.1
s Socket is closedN( R Rw R R R ( R- R R ( ( s4 /usr/lib/python2.6/site-packages/paramiko/channel.pyt sendall_stderr s
c G s t | g t | S( s5
Return a file-like object associated with this channel. The optional
C{mode} and C{bufsize} arguments are interpreted the same way as by
the built-in C{file()} function in python.
@return: object which can be used for python file I/O.
@rtype: L{ChannelFile}
( t ChannelFilet list( R- t params( ( s4 /usr/lib/python2.6/site-packages/paramiko/channel.pyt makefile s c G s t | g t | S( s
Return a file-like object associated with this channel's stderr
stream. Only channels using L{exec_command} or L{invoke_shell}
without a pty will ever have data on the stderr stream.
The optional C{mode} and C{bufsize} arguments are interpreted the
same way as by the built-in C{file()} function in python. For a
client, it only makes sense to open this file for reading. For a
server, it only makes sense to open this file for writing.
@return: object which can be used for python file I/O.
@rtype: L{ChannelFile}
@since: 1.1
( t ChannelStderrFileR ( R- R ( ( s4 /usr/lib/python2.6/site-packages/paramiko/channel.pyt makefile_stderr# s c C s | i i zv | i d j o | i i St i | _ t i | i \ } } | i i | | i
i | | i i SWd | i i Xd S( s
Returns an OS-level file descriptor which can be used for polling, but
but I{not} for reading or writing. This is primaily to allow python's
C{select} module to work.
The first time C{fileno} is called on a channel, a pipe is created to
simulate real OS-level file descriptor (FD) behavior. Because of this,
two OS-level FDs are created, which will use up FDs faster than normal.
(You won't notice this effect unless you have hundreds of channels
open at the same time.)
@return: an OS-level file descriptor
@rtype: int
@warning: This method causes channel reads to be slightly less
efficient.
N( R Re R' R t filenoR t make_pipet make_or_pipeR t set_eventR Rg ( R- t p1t p2( ( s4 /usr/lib/python2.6/site-packages/paramiko/channel.pyR 5 s
c C s | d j p
| d j o
d | _ n | d j p
| d j oS | i i z | i } Wd | i i X| d j o | i i | q n d S( s
Shut down one or both halves of the connection. If C{how} is 0,
further receives are disallowed. If C{how} is 1, further sends
are disallowed. If C{how} is 2, further sends and receives are
disallowed. This closes the stream in one or both directions.
@param how: 0 (stop receiving), 1 (stop sending), or 2 (stop
receiving and sending).
@type how: int
i i i N( R R Re t _send_eofRg R R R@ ( R- t howRE ( ( s4 /usr/lib/python2.6/site-packages/paramiko/channel.pyt shutdownT s
c C s | i d d S( sy
Shutdown the receiving side of this socket, closing the stream in
the incoming direction. After this call, future reads on this
channel will fail instantly. This is a convenience method, equivalent
to C{shutdown(0)}, for people who don't make it a habit to
memorize unix constants from the 1970s.
@since: 1.2
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Shutdown the sending side of this socket, closing the stream in
the outgoing direction. After this call, future writes on this
channel will fail instantly. This is a convenience method, equivalent
to C{shutdown(1)}, for people who don't make it a habit to
memorize unix constants from the 1970s.
@since: 1.2
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(You are already holding the lock.)
Wait for the send window to open up, and allocate up to C{size} bytes
for transmission. If no space opens up before the timeout, a timeout
exception is raised. Returns the number of bytes available to send
(may be less than requested).
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A file-like wrapper around L{Channel}. A ChannelFile is created by calling
L{Channel.makefile}.
@bug: To correctly emulate the file object created from a socket's
C{makefile} method, a L{Channel} and its C{ChannelFile} should be able
to be closed or garbage-collected independently. Currently, closing
the C{ChannelFile} does nothing but flush the buffer.
t ric C s* | | _ t i | | i | | d S( N( t channelR R. t _set_mode( R- R t modet bufsize( ( s4 /usr/lib/python2.6/site-packages/paramiko/channel.pyR. s
c C s d t | i d S( se
Returns a string representation of this object, for debugging.
@rtype: str
s s*