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�
�sGc @ s� d Z y� d d l Z d d l Z d d l Z d d l Z d d l Z d d l Z d d l Z d d l Z d d l Z d d l
Z
d d l Z d d l Z d d l
Z
d d l Z d d l Z d d l Z Wn) e k
r� Z e e e � d � � n Xd Z d Z d d d d d
d d d
d g Z d e f d � � YZ d e f d � � YZ d e f d � � YZ d e e e e e e d � Z d e f d � � YZ d e f d � � YZ d e f d � � YZ! d � Z" d � Z# d S( s� Pexpect is a Python module for spawning child applications and controlling
them automatically. Pexpect can be used for automating interactive applications
such as ssh, ftp, passwd, telnet, etc. It can be used to a automate setup
scripts for duplicating software package installations on different servers. It
can be used for automated software testing. Pexpect is in the spirit of Don
Libes' Expect, but Pexpect is pure Python. Other Expect-like modules for Python
require TCL and Expect or require C extensions to be compiled. Pexpect does not
use C, Expect, or TCL extensions. It should work on any platform that supports
the standard Python pty module. The Pexpect interface focuses on ease of use so
that simple tasks are easy.
There are two main interfaces to Pexpect -- the function, run() and the class,
spawn. You can call the run() function to execute a command and return the
output. This is a handy replacement for os.system().
For example::
pexpect.run('ls -la')
The more powerful interface is the spawn class. You can use this to spawn an
external child command and then interact with the child by sending lines and
expecting responses.
For example::
child = pexpect.spawn('scp foo myname@host.example.com:.')
child.expect ('Password:')
child.sendline (mypassword)
This works even for commands that ask for passwords or other input outside of
the normal stdio streams.
Credits: Noah Spurrier, Richard Holden, Marco Molteni, Kimberley Burchett,
Robert Stone, Hartmut Goebel, Chad Schroeder, Erick Tryzelaar, Dave Kirby, Ids
vander Molen, George Todd, Noel Taylor, Nicolas D. Cesar, Alexander Gattin,
Geoffrey Marshall, Francisco Lourenco, Glen Mabey, Karthik Gurusamy, Fernando
Perez, Corey Minyard, Jon Cohen, Guillaume Chazarain, Andrew Ryan, Nick
Craig-Wood, Andrew Stone, Jorgen Grahn (Let me know if I forgot anyone.)
Free, open source, and all that good stuff.
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
of the Software, and to permit persons to whom the Software is furnished to do
so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
Pexpect Copyright (c) 2008 Noah Spurrier
http://pexpect.sourceforge.net/
$Id: pexpect.py 507 2007-12-27 02:40:52Z noah $
i����Ns�
A critical module was not found. Probably this operating system does not
support it. Pexpect is intended for UNIX-like operating systems.s 2.3s $Revision: 399 $t ExceptionPexpectt EOFt TIMEOUTt spawnt runt whicht split_command_linet __version__t __revision__c B s2 e Z d Z d � Z d � Z d � Z d � Z RS( s9 Base class for all exceptions raised by this module.
c C s
| | _ d S( N( t value( t selfR ( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyt __init__b s c C s
t | j � S( N( t strR ( R
( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyt __str__f s c C s] t j t j � d � } g | D] } | j | � r | ^ q } t j | � } d j | � S( s� This returns an abbreviated stack trace with lines that only concern
the caller. In other words, the stack trace inside the Pexpect module
is not included. i t ( t tracebackt
extract_tbt syst exc_infot% _ExceptionPexpect__filter_not_pexpectt format_listt join( R
t tblistt item( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyt get_tracej s (c C s% | d j d � d k r t St Sd S( s@ This returns True if list item 0 the string 'pexpect.py' in it. i s
pexpect.pyi����N( t findt Truet False( R
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R R ( ( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyR ] s
c B s e Z d Z RS( sN Raised when EOF is read from a child. This usually means the child has exited.( R R R ( ( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyR s c B s e Z d Z RS( s- Raised when a read time exceeds the timeout. ( R R R ( ( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyR � s c C s# | d k r3 t | d d d | d | d | �} n* t | d | d d d | d | d | �} | d k r� | j � } | j � }
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This function runs the given command; waits for it to finish; then
returns all output as a string. STDERR is included in output. If the full
path to the command is not given then the path is searched.
Note that lines are terminated by CR/LF (\r\n) combination even on
UNIX-like systems because this is the standard for pseudo ttys. If you set
'withexitstatus' to true, then run will return a tuple of (command_output,
exitstatus). If 'withexitstatus' is false then this returns just
command_output.
The run() function can often be used instead of creating a spawn instance.
For example, the following code uses spawn::
from pexpect import *
child = spawn('scp foo myname@host.example.com:.')
child.expect ('(?i)password')
child.sendline (mypassword)
The previous code can be replace with the following::
from pexpect import *
run ('scp foo myname@host.example.com:.', events={'(?i)password': mypassword})
Examples
========
Start the apache daemon on the local machine::
from pexpect import *
run ("/usr/local/apache/bin/apachectl start")
Check in a file using SVN::
from pexpect import *
run ("svn ci -m 'automatic commit' my_file.py")
Run a command and capture exit status::
from pexpect import *
(command_output, exitstatus) = run ('ls -l /bin', withexitstatus=1)
Tricky Examples
===============
The following will run SSH and execute 'ls -l' on the remote machine. The
password 'secret' will be sent if the '(?i)password' pattern is ever seen::
run ("ssh username@machine.example.com 'ls -l'", events={'(?i)password':'secret\n'})
This will start mencoder to rip a video from DVD. This will also display
progress ticks every 5 seconds as it runs. For example::
from pexpect import *
def print_ticks(d):
print d['event_count'],
run ("mencoder dvd://1 -o video.avi -oac copy -ovc copy", events={TIMEOUT:print_ticks}, timeout=5)
The 'events' argument should be a dictionary of patterns and responses.
Whenever one of the patterns is seen in the command out run() will send the
associated response string. Note that you should put newlines in your
string if Enter is necessary. The responses may also contain callback
functions. Any callback is function that takes a dictionary as an argument.
The dictionary contains all the locals from the run() function, so you can
access the child spawn object or any other variable defined in run()
(event_count, child, and extra_args are the most useful). A callback may
return True to stop the current run process otherwise run() continues until
the next event. A callback may also return a string which will be sent to
the child. 'extra_args' is not used by directly run(). It provides a way to
pass data to a callback function through run() through the locals
dictionary passed to a callback. i����t maxreadi� t logfilet cwdt envt timeouti s/ The callback must be a string or function type.i R N( R t Nonet keyst valuest expectt typet aftert typest StringTypest appendt beforet sendt FunctionTypet localsR t stdoutt flusht TypeErrorR R R t closet
exitstatus( t commandR% t withexitstatust eventst
extra_argsR" R# R$ t childt patternst responsest child_result_listt event_countt indext callback_resultt et child_result( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyR � sL J '*
c B s e Z d Z g d d d4 d4 d4 d4 d � Z d � Z d � Z g d � Z d � Z d � Z d � Z
e d
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d � Z d � Z d � Z d
d � Z d � Z d � Z d � Z d d � Z d � Z d � Z d � Z d � Z e d! � Z! d" � Z" d# � Z# d$ � Z$ d% � Z% d
d4 d& � Z& d
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d) � Z) d* � Z* d+ � Z+ e, d, � d4 d4 d- � Z- d. � Z. d/ � Z/ d4 d4 d4 d0 � Z0 d4 d1 � Z1 d2 � Z2 d3 � Z3 RS(5 sj This is the main class interface for Pexpect. Use this class to start
and control child applications. i i� c C s t j | _ t j | _ t j | _ t j | _ t j | _ t j | _ d | _ t
| _ d | _ d | _
d | _ d | _ t | _ d | _ d | _ d | _ t
| _ d | _ d | _ | | _ t | _ | | _ d | _ d | _ | | _ d | _ | | _ d | _! d | _" d | _# t
| _$ d t% | � d | _& d | _' t | _( | | _) | | _* t j+ j, � j- d � d k | _. t j+ j, � j- d � d k s�t j+ j, � j- d
� d k r�t
| _/ n t | _/ | d k r d | _0 d | _1 d | _& n | j2 | | � d S(
s� This is the constructor. The command parameter may be a string that
includes a command and any arguments to the command. For example::
child = pexpect.spawn ('/usr/bin/ftp')
child = pexpect.spawn ('/usr/bin/ssh user@example.com')
child = pexpect.spawn ('ls -latr /tmp')
You may also construct it with a list of arguments like so::
child = pexpect.spawn ('/usr/bin/ftp', [])
child = pexpect.spawn ('/usr/bin/ssh', ['user@example.com'])
child = pexpect.spawn ('ls', ['-latr', '/tmp'])
After this the child application will be created and will be ready to
talk to. For normal use, see expect() and send() and sendline().
Remember that Pexpect does NOT interpret shell meta characters such as
redirect, pipe, or wild cards (>, |, or *). This is a common mistake.
If you want to run a command and pipe it through another command then
you must also start a shell. For example::
child = pexpect.spawn('/bin/bash -c "ls -l | grep LOG > log_list.txt"')
child.expect(pexpect.EOF)
The second form of spawn (where you pass a list of arguments) is useful
in situations where you wish to spawn a command and pass it its own
argument list. This can make syntax more clear. For example, the
following is equivalent to the previous example::
shell_cmd = 'ls -l | grep LOG > log_list.txt'
child = pexpect.spawn('/bin/bash', ['-c', shell_cmd])
child.expect(pexpect.EOF)
The maxread attribute sets the read buffer size. This is maximum number
of bytes that Pexpect will try to read from a TTY at one time. Setting
the maxread size to 1 will turn off buffering. Setting the maxread
value higher may help performance in cases where large amounts of
output are read back from the child. This feature is useful in
conjunction with searchwindowsize.
The searchwindowsize attribute sets the how far back in the incomming
seach buffer Pexpect will search for pattern matches. Every time
Pexpect reads some data from the child it will append the data to the
incomming buffer. The default is to search from the beginning of the
imcomming buffer each time new data is read from the child. But this is
very inefficient if you are running a command that generates a large
amount of data where you want to match The searchwindowsize does not
effect the size of the incomming data buffer. You will still have
access to the full buffer after expect() returns.
The logfile member turns on or off logging. All input and output will
be copied to the given file object. Set logfile to None to stop
logging. This is the default. Set logfile to sys.stdout to echo
everything to standard output. The logfile is flushed after each write.
Example log input and output to a file::
child = pexpect.spawn('some_command')
fout = file('mylog.txt','w')
child.logfile = fout
Example log to stdout::
child = pexpect.spawn('some_command')
child.logfile = sys.stdout
The logfile_read and logfile_send members can be used to separately log
the input from the child and output sent to the child. Sometimes you
don't want to see everything you write to the child. You only want to
log what the child sends back. For example::
child = pexpect.spawn('some_command')
child.logfile_read = sys.stdout
To separately log output sent to the child use logfile_send::
self.logfile_send = fout
The delaybeforesend helps overcome a weird behavior that many users
were experiencing. The typical problem was that a user would expect() a
"Password:" prompt and then immediately call sendline() to send the
password. The user would then see that their password was echoed back
to them. Passwords don't normally echo. The problem is caused by the
fact that most applications print out the "Password" prompt and then
turn off stdin echo, but if you send your password before the
application turned off echo, then you get your password echoed.
Normally this wouldn't be a problem when interacting with a human at a
real keyboard. If you introduce a slight delay just before writing then
this seems to clear up the problem. This was such a common problem for
many users that I decided that the default pexpect behavior should be
to sleep just before writing to the child application. 1/20th of a
second (50 ms) seems to be enough to clear up the problem. You can set
delaybeforesend to 0 to return to the old behavior. Most Linux machines
don't like this to be below 0.03. I don't know why.
Note that spawn is clever about finding commands on your path.
It uses the same logic that "which" uses to find executables.
If you wish to get the exit status of the child you must call the
close() method. The exit or signal status of the child will be stored
in self.exitstatus or self.signalstatus. If the child exited normally
then exitstatus will store the exit return code and signalstatus will
be None. If the child was terminated abnormally with a signal then
signalstatus will store the signal value and exitstatus will be None.
If you need more detail you can also read the self.status member which
stores the status returned by os.waitpid. You can interpret this using
os.WIFEXITED/os.WEXITSTATUS or os.WIFSIGNALED/os.TERMSIG. i����R g�������?g�������?t <t >t irixi t solarist sunos5s <pexpect factory incomplete>N(3 t ptyt STDIN_FILENOt
STDOUT_FILENOt
STDERR_FILENOR t stdinR3 t stderrR& t searcherR t
ignorecaseR/ R+ t matcht match_indexR t
terminatedR7 t signalstatust statust flag_eoft pidt child_fdR% R t delimiterR" t logfile_readt logfile_sendR! t buffert searchwindowsizet delaybeforesendt delayaftercloset delayafterterminatet softspacet reprt namet encodingt closedR# R$ t platformt lowerR t _spawn__irix_hackt use_native_pty_forkR8 t argst _spawn( R
R8 Rk R% R! R^ R" R# R$ ( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyR sZ n !< c C s2 | j s. y | j � Wq. t k
r* q. Xn d S( sL This makes sure that no system resources are left open. Python only
garbage collects Python objects. OS file descriptors are not Python
objects, so they must be handled explicitly. If the child file
descriptor was opened outside of this class (passed to the constructor)
then this does not close it. N( Rf R6 t AttributeError( R
( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyt __del__� s
c C s� g } | j t | � � | j d t d t d � | j d t | j � � | j d t | j � � | j d t | j � � | j d t | j � d � | j d t | j � d � | j d
t | j
� � | j d t | j � � | j d t | j � � | j d
t | j
� � | j d t | j � � | j d t | j � � | j d t | j � � | j d t | j � � | j d t | j � � | j d t | j � � | j d t | j � � | j d t | j � � | j d t | j � � | j d t | j � � | j d t | j � � | j d t | j � � | j d t | j � � | j d t | j � � | j d t | j � � d j | � S( sV This returns a human-readable string that represents the state of
the object. s version: s (t )s command: s args: s
searcher: s buffer (last 100 chars): i����s before (last 100 chars): s after: s match: s
match_index: s exitstatus: s
flag_eof: s pid: s
child_fd: s closed: s timeout: s delimiter: s logfile: s logfile_read: s logfile_send: s maxread: s ignorecase: s searchwindowsize: s delaybeforesend: s delayafterclose: s delayafterterminate: s
( R. Rc R R R R8 Rk RP R] R/ R+ RR RS R7 RW RX RY Rf R% RZ R" R[ R\ R! RQ R^ R_ R` Ra R ( R
t s( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyR
� s8 c C s� t | � t d � k r' t d � � n t | � t g � k rN t d � � n | g k r| t | � | _ | j d | _ n& | | _ | j j d | � | | _ t | j � } | d k r� t d | j � � n | | _ | j | j d <d d j | j � d | _
| j d k s$t d � � | j d k s?t d � � | j
r�y t j � \ | _ | _ Wq�t k
r�} t d
t | � � � q�Xn | j � \ | _ | _ | j d k r�y& t j j � | _ | j d d � Wn n Xt j t j � d } x< t d
| � D]+ } y t j | � Wqt k
r:qXqWt j t j t j � | j! d k rwt j" | j! � n | j# d k r�t j$ | j | j � q�t j% | j | j | j# � n t& | _' t& | _( d S( s This starts the given command in a child process. This does all the
fork/exec type of stuff for a pty. This is called by __init__. If args
is empty then command will be parsed (split on spaces) and args will be
set to parsed arguments. i s� Command is an int type. If this is a file descriptor then maybe you want to use fdpexpect.fdspawn which takes an existing file descriptor instead of a command string.s# The argument, args, must be a list.s4 The command was not found or was not executable: %s.RE t RF s The pid member should be None.s& The command member should not be None.s Error! pty.fork() failed: i iP i N() R* R R5 R Rk R8 t insertR R& R Rd RX t AssertionErrorRj RJ t forkRY t OSErrorR t _spawn__fork_ptyR R3 t filenot
setwinsizet resourcet getrlimitt
RLIMIT_NOFILEt ranget osR6 t signalt SIGHUPt SIG_IGNR# t chdirR$ t execvt execvpeR RT Rf ( R
R8 Rk t command_with_pathRC t max_fdt i( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyRl � sX
c C s� t j � \ } } | d k s* | d k r6 t d � n t j � } | d k rZ t d � n� | d k r� t j | � | j | � t j | d � t j | d � t j | d � | d k r� t j | � q� n
t j | � | | f S( s This implements a substitute for the forkpty system call. This
should be more portable than the pty.fork() function. Specifically,
this should work on Solaris.
Modified 10.06.05 by Geoff Marshall: Implemented __fork_pty() method to
resolve the issue with Python's pty.fork() not supporting Solaris,
particularly ssh. Based on patch to posixmodule.c authored by Noah
Spurrier::
http://mail.python.org/pipermail/python-dev/2003-May/035281.html
i s, Error! Could not open pty with os.openpty().s Error! Failed os.fork().i i ( R} t openptyR Rt R6 t _spawn__pty_make_controlling_ttyt dup2( R
t parent_fdRY RX ( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyt
__fork_pty7 s
c C s t j | � } t j d t j t j B� } | d k rG t j | � n t j � yE t j d t j t j B� } | d k r� t j | � t d � n Wn n Xt j | t j � } | d k r� t d | � n
t j | � t j d t j � } | d k r t d � n
t j | � d S( s� This makes the pseudo-terminal the controlling tty. This should be
more portable than the pty.fork() function. Specifically, this should
work on Solaris. s /dev/ttyi s6 Error! We are not disconnected from a controlling tty.s! Error! Could not open child pty, s/ Error! Could not open controlling tty, /dev/ttyN( R} t ttynamet opent O_RDWRt O_NOCTTYR6 t setsidR t O_WRONLY( R
t tty_fdt
child_namet fd( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyt __pty_make_controlling_tty^ s(
c C s | j S( sC This returns the file descriptor of the pty for the child.
( RY ( R
( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyRw � s c C sy | j su | j � t j | j � t j | j � | j � r` | j | � s` t
d � � q` n d | _ t | _ n d S( s? This closes the connection with the child application. Note that
calling close() more than once is valid. This emulates standard Python
behavior with files. Set force to True if you want to make sure that
the child is terminated (SIGKILL is sent if the child ignores SIGHUP
and SIGINT). s7 close() could not terminate the child using terminate()i����N( Rf R4 R} R6 RY t timet sleepR` t isalivet terminateR R ( R
t force( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyR6 � s
c C s d S( sW This does nothing. It is here to support the interface for a
File-like object. N( ( R
( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyR4 � s c C s t j | j � S( sk This returns True if the file descriptor is open and connected to a
tty(-like) device, else False. ( R} t isattyRY ( R
( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyR� � s i����c C s� | d k r | j } n | d k r7 t j � | } n xb t r� | j � sP t S| d k rl | d k rl t S| d k r� | t j � } n t j d � q: Wd S( s� This waits until the terminal ECHO flag is set False. This returns
True if the echo mode is off. This returns False if the ECHO flag was
not set False before the timeout. This can be used to detect when the
child is waiting for a password. Usually a child application will turn
off echo mode when it is waiting for the user to enter a password. For
example, instead of expecting the "password:" prompt you can wait for
the child to set ECHO off::
p = pexpect.spawn ('ssh user@example.com')
p.waitnoecho()
p.sendline(mypassword)
If timeout is None then this method to block forever until ECHO flag is
False.
i����i g�������?N( R% R& R� R t getechoR R� ( R
R% t end_time( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyt
waitnoecho� s c C s+ t j | j � } | d t j @r' t St S( s� This returns the terminal echo mode. This returns True if echo is
on or False if echo is off. Child applications that are expecting you
to enter a password often set ECHO False. See waitnoecho(). i ( t termiost tcgetattrRY t ECHOR R ( R
t attr( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyR� � s c C sj | j t j | j � } | r7 | d t j B| d <n | d t j @| d <t j | j t j | � d S( s This sets the terminal echo mode on or off. Note that anything the
child sent before the echo will be lost, so you should be sure that
your input buffer is empty before you call setecho(). For example, the
following will work as expected::
p = pexpect.spawn('cat')
p.sendline ('1234') # We will see this twice (once from tty echo and again from cat).
p.expect (['1234'])
p.expect (['1234'])
p.setecho(False) # Turn off tty echo
p.sendline ('abcd') # We will set this only once (echoed by cat).
p.sendline ('wxyz') # We will set this only once (echoed by cat)
p.expect (['abcd'])
p.expect (['wxyz'])
The following WILL NOT WORK because the lines sent before the setecho
will be lost::
p = pexpect.spawn('cat')
p.sendline ('1234') # We will see this twice (once from tty echo and again from cat).
p.setecho(False) # Turn off tty echo
p.sendline ('abcd') # We will set this only once (echoed by cat).
p.sendline ('wxyz') # We will set this only once (echoed by cat)
p.expect (['1234'])
p.expect (['1234'])
p.expect (['abcd'])
p.expect (['wxyz'])
i N( RY R� R� R� t tcsetattrt TCSANOW( R
t stateR� ( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyt setecho� s i c C s, | j r t d � � n | d k r0 | j } n | j � s� | j | j g g g d � \ } } } | s� t | _ t d � � q� n_ | j r� | j | j g g g d � \ } } } | r� | j � r� t | _ t d � � q� n | j | j g g g | � \ } } } | sC| j � s4t | _ t d � � qCt
d � � n | j | k r y t j | j | � } Wn( t
k
r�} t | _ t d � � n X| d
k r�t | _ t d � � n | j d
k r�| j j | � | j j � n | j d
k r| j j | � | j j � n | St d � � d
S( sb This reads at most size characters from the child application. It
includes a timeout. If the read does not complete within the timeout
period then a TIMEOUT exception is raised. If the end of file is read
then an EOF exception will be raised. If a log file was set using
setlog() then all data will also be written to the log file.
If timeout is None then the read may block indefinitely. If timeout is -1
then the self.timeout value is used. If timeout is 0 then the child is
polled and if there was no data immediately ready then this will raise
a TIMEOUT exception.
The timeout refers only to the amount of time to read at least one
character. This is not effected by the 'size' parameter, so if you call
read_nonblocking(size=100, timeout=30) and only one character is
available right away then one character will be returned immediately.
It will not wait for 30 seconds for another 99 characters to come in.
This is a wrapper around os.read(). It uses select.select() to
implement the timeout. s3 I/O operation on closed file in read_nonblocking().i����i s< End Of File (EOF) in read_nonblocking(). Braindead platform.i s8 End Of File (EOF) in read_nonblocking(). Pokey platform.s= End of File (EOF) in read_nonblocking(). Very pokey platform.s' Timeout exceeded in read_nonblocking().sB End Of File (EOF) in read_nonblocking(). Exception style platform.R sE End Of File (EOF) in read_nonblocking(). Empty string style platform.s2 Reached an unexpected state in read_nonblocking().N( Rf t
ValueErrorR% R� t _spawn__selectRY R RW R Ri R R} t readRu R" R& t writeR4 R[ R ( R
t sizeR% t rt wRC Rp ( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyt read_nonblocking sJ ' ' ' c C s~ | d k r d S| d k r3 | j | j � | j St j d | t j � } | j | | j g � } | d k rw | j S| j S( sD This reads at most "size" bytes from the file (less if the read hits
EOF before obtaining size bytes). If the size argument is negative or
omitted, read all data until EOF is reached. The bytes are returned as
a string object. An empty string is returned when EOF is encountered
immediately. i R s .{%d}( R) RZ R/ t ret compilet DOTALLR+ ( R
R� t creRA ( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyR� O s c C sJ | d k r d S| j d | j g � } | d k r? | j d S| j Sd S( sM This reads and returns one entire line. A trailing newline is kept
in the string, but may be absent when a file ends with an incomplete
line. Note: This readline() looks for a \r\n pair even on UNIX
because this is what the pseudo tty device returns. So contrary to what
you may expect you will receive the newline as \r\n. An empty string
is returned when EOF is hit immediately. Currently, the size argument is
mostly ignored, so this behavior is not standard for a file-like
object. If size is 0 then an empty string is returned. i R s
N( R) RZ R/ ( R
R� RA ( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyt readlinej s c C s | S( s> This is to support iterators over a file-like object.
( ( R
( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyt __iter__} s c C s% | j � } | d k r! t � n | S( s> This is to support iterators over a file-like object.
R ( R� t
StopIteration( R
t result( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyt next� s c C s: g } x- t r5 | j � } | s% Pn | j | � q W| S( s� This reads until EOF using readline() and returns a list containing
the lines thus read. The optional "sizehint" argument is ignored. ( R R� R. ( R
t sizehintt linest line( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyt readlines� s c C s | j | � d S( sH This is similar to send() except that there is no return value.
N( R0 ( R
Rp ( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyR� � s c C s" x | D] } | j | � q Wd S( s� This calls write() for each element in the sequence. The sequence
can be any iterable object producing strings, typically a list of
strings. This does not add line separators There is no return value.
N( R� ( R
t sequenceRp ( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyt
writelines� s
c C s� t j | j � | j d k r? | j j | � | j j � n | j d k rn | j j | � | j j � n t j | j | � } | S( s� This sends a string to the child process. This returns the number of
bytes written. If a log file was set then the data is also written to
the log. N(
R� R� R_ R" R& R� R4 R\ R} RY ( R
Rp t c( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyR0 � s R c C s) | j | � } | | j t j � } | S( sm This is like send(), but it adds a line feed (os.linesep). This
returns the number of bytes written. ( R0 R} t linesep( R
Rp t n( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyt sendline� s c C s� | j � } t | � } | d k rW | d k rW | t d � d } | j t | � � Si d d 6d d 6d d 6d d
6d d 6d d
6d d 6d d 6d d 6d d 6d d 6d d 6} | | k r� d S| j t | | � � S( s� This sends a control character to the child such as Ctrl-C or
Ctrl-D. For example, to send a Ctrl-G (ASCII 7)::
child.sendcontrol('g')
See also, sendintr() and sendeof().
ia iz t ai i t @t `i t [t {i s \t |i t ]t }i t ^t ~i t _i t ?( Rh t ordR0 t chr( R
t charR� t d( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyt sendcontrol� s
c C sL t t d � r/ t j | j � d t j } n t d � } | j | � d S( s1 This sends an EOF to the child. This sends a character which causes
the pending parent output buffer to be sent to the waiting child
program without waiting for end-of-line. If it is the first character
of the line, the read() in the user program returns 0, which signifies
end-of-file. This means to work as expected a sendeof() has to be
called at the beginning of a line. This method does not send a newline.
It is the responsibility of the caller to ensure the eof is sent at the
beginning of a line. t VEOFi i N( t hasattrR� R� RY R� R� R0 ( R
R� ( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyt sendeof� s c C sL t t d � r/ t j | j � d t j } n t d � } | j | � d S( sn This sends a SIGINT to the child. It does not require
the SIGINT to be the first character on a line. t VINTRi i N( R� R� R� RY R� R� R0 ( R
R� ( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyt sendintr s c C s | j S( s@ This returns True if the EOF exception was ever raised.
( RW ( R
( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyt eof
s c C s# | j � s t Sy� | j t j � t j | j � | j � sC t S| j t j � t j | j � | j � ss t S| j t j � t j | j � | j � s� t S| r� | j t j
� t j | j � | j � s� t St Sn t SWn7 t k
r } t j | j � | j � st St Sn Xd S( s� This forces a child process to terminate. It starts nicely with
SIGHUP and SIGINT. If "force" is True then moves onto SIGKILL. This
returns True if the child was terminated. This returns False if the
child could not be terminated. N(
R� R t killR~ R R� R� Ra t SIGCONTt SIGINTt SIGKILLR Ru ( R
R� RC ( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyR� s6 c C s� | j � r* t j | j d � \ } } n t d � � t j | � | _ t j | � r� | | _ t j | � | _ d | _
t | _ n] t j
| � r� | | _ d | _ t j | � | _
t | _ n t j | � r� t d � � n | j S( s` This waits until the child exits. This is a blocking call. This will
not read any data from the child, so this will block forever if the
child has unread output and has terminated. In other words, the child
may have printed output then called exit(); but, technically, the child
is still alive until its output is read. i s# Cannot wait for dead child process.s� Wait was called for a child process that is stopped. This is not supported. Is some other process attempting job control with our child pid?N( R� R} t waitpidRX R t WEXITSTATUSR7 t WIFEXITEDRV R& RU R RT t WIFSIGNALEDt WTERMSIGt
WIFSTOPPED( R
RX RV ( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyt wait= s" c C s� | j r
t S| j r d } n t j } y t j | j | � \ } } Wn; t k
r� } | d t j k r{ t
d � � q� | � n X| d k ry t j | j | � \ } } Wn; t k
r� } | d t j k r� t
d � � q� | � n X| d k rt Sn | d k rt St j | � rP| | _
t j | � | _ d | _ t | _ n] t j | � r�| | _
d | _ t j | � | _ t | _ n t j | � r�t
d � � n t S( sZ This tests if the child process is running or not. This is
non-blocking. If the child was terminated then this will read the
exitstatus or signalstatus of the child. This returns True if the child
process appears to be running or False if not. It can take literally
SECONDS for Solaris to return the right status. i s� isalive() encountered condition where "terminated" is 0, but there was no child process. Did someone else call waitpid() on our process?s� isalive() encountered condition that should never happen. There was no child process. Did someone else call waitpid() on our process?s� isalive() encountered condition where child process is stopped. This is not supported. Is some other process attempting job control with our child pid?N( RT R RW R} t WNOHANGR� RX Ru t errnot ECHILDR R R� RV R� R7 R& RU R� R� R� ( R
t waitpid_optionsRX RV RC ( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyR� X sF
c C s& | j � r" t j | j | � n d S( s� This sends the given signal to the child application. In keeping
with UNIX tradition it has a misleading name. It does not necessarily
kill the child unless you send the right signal. N( R� R} R� RX ( R
t sig( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyR� � s c C s$ | d k r g St | � t j k r1 | g } n t j } | j rS | t j B} n g } x� | D]� } t | � t j k r� | j t j
| | � � q` | t k r� | j t � q` | t k r� | j t � q` t | � t t j
d � � k r | j | � q` t
d t t | � � � � q` W| S( s� This compiles a pattern-string or a list of pattern-strings.
Patterns must be a StringType, EOF, TIMEOUT, SRE_Pattern, or a list of
those. Patterns may also be None which results in an empty list (you
might do this if waiting for an EOF or TIMEOUT condition without
expecting any pattern).
This is used by expect() when calling expect_list(). Thus expect() is
nothing more than::
cpl = self.compile_pattern_list(pl)
return self.expect_list(cpl, timeout)
If you are using expect() within a loop it may be more
efficient to compile the patterns first and then call expect_list().
This avoid calls in a loop to compile_pattern_list()::
cpl = self.compile_pattern_list(my_pattern)
while some_condition:
...
i = self.expect_list(clp, timeout)
...
R s[ Argument must be one of StringTypes, EOF, TIMEOUT, SRE_Pattern, or a list of those type. %sN( R& R* R, t ListTypeR� R� RQ t
IGNORECASER- R. R� R R R5 R ( R
R= t
compile_flagst compiled_pattern_listt p( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyt compile_pattern_list� s&
! c C s" | j | � } | j | | | � S( st
This seeks through the stream until a pattern is matched. The
pattern is overloaded and may take several types. The pattern can be a
StringType, EOF, a compiled re, or a list of any of those types.
Strings will be compiled to re types. This returns the index into the
pattern list. If the pattern was not a list this returns index 0 on a
successful match. This may raise exceptions for EOF or TIMEOUT. To
avoid the EOF or TIMEOUT exceptions add EOF or TIMEOUT to the pattern
list. That will cause expect to match an EOF or TIMEOUT condition
instead of raising an exception.
If you pass a list of patterns and more than one matches, the first match
in the stream is chosen. If more than one pattern matches at that point,
the leftmost in the pattern list is chosen. For example::
# the input is 'foobar'
index = p.expect (['bar', 'foo', 'foobar'])
# returns 1 ('foo') even though 'foobar' is a "better" match
Please note, however, that buffering can affect this behavior, since
input arrives in unpredictable chunks. For example::
# the input is 'foobar'
index = p.expect (['foobar', 'foo'])
# returns 0 ('foobar') if all input is available at once,
# but returs 1 ('foo') if parts of the final 'bar' arrive late
After a match is found the instance attributes 'before', 'after' and
'match' will be set. You can see all the data read before the match in
'before'. You can see the data that was matched in 'after'. The
re.MatchObject used in the re match will be in 'match'. If an error
occurred then 'before' will be set to all the data read so far and
'after' and 'match' will be None.
If timeout is -1 then timeout will be set to the self.timeout value.
A list entry may be EOF or TIMEOUT instead of a string. This will
catch these exceptions and return the index of the list entry instead
of raising the exception. The attribute 'after' will be set to the
exception type. The attribute 'match' will be None. This allows you to
write code like this::
index = p.expect (['good', 'bad', pexpect.EOF, pexpect.TIMEOUT])
if index == 0:
do_something()
elif index == 1:
do_something_else()
elif index == 2:
do_some_other_thing()
elif index == 3:
do_something_completely_different()
instead of code like this::
try:
index = p.expect (['good', 'bad'])
if index == 0:
do_something()
elif index == 1:
do_something_else()
except EOF:
do_some_other_thing()
except TIMEOUT:
do_something_completely_different()
These two forms are equivalent. It all depends on what you want. You
can also just expect the EOF if you are waiting for all output of a
child to finish. For example::
p = pexpect.spawn('/bin/ls')
p.expect (pexpect.EOF)
print p.before
If you are trying to optimize for speed then see expect_list().
( R� t expect_list( R
t patternR% R^ R� ( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyR) � s Mc C s | j t | � | | � S( s� This takes a list of compiled regular expressions and returns the
index into the pattern_list that matched the child output. The list may
also contain EOF or TIMEOUT (which are not compiled regular
expressions). This method is similar to the expect() method except that
expect_list() does not recompile the pattern list on every call. This
may help if you are trying to optimize for speed, otherwise just use
the expect() method. This is called by expect(). If timeout==-1 then
the self.timeout value is used. If searchwindowsize==-1 then the
self.searchwindowsize value is used. ( t expect_loopt searcher_re( R
t pattern_listR% R^ ( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyR� ! s c C sL t | � t j k s' | t t f k r3 | g } n | j t | � | | � S( sK This is similar to expect(), but uses plain string matching instead
of compiled regular expressions in 'pattern_list'. The 'pattern_list'
may be a string; a list or other sequence of strings; or TIMEOUT and
EOF.
This call might be faster than expect() for two reasons: string
searching is faster than RE matching and it is possible to limit the
search to just the end of the input buffer.
This method is also useful when you don't want to have to worry about
escaping regular expression characters that you want to match.( R* R, R- R R R� t searcher_string( R
R� R% R^ ( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyt expect_exact/ s ' c
C s� | | _ | d k r! | j } n | d k r@ t j � | } n | d k rX | j } n y| j } t | � } x� t rm| j | | | � } | d k r� | | j | _ | | j
| _ | | j
| j !| _ | j
| _
| | _ | j S| d k r| d k rt d � � n | j | j | � } t | � } t j d � | | } | d k rs | t j � } qs qs WWnHt k
r�} d | _ | | _ t | _ | j } | d k r�t | _
| | _ | j Sd | _
d | _ t t | � d t | � � � n� t k
r�} | | _ | | _ t | _ | j } | d k rWt | _
| | _ | j Sd | _
d | _ t t | � d t | � � � n. | | _ d | _ d | _
d | _ � n Xd S( s This is the common loop used inside expect. The 'searcher' should be
an instance of searcher_re or searcher_string, which describes how and what
to search for in the input.
See expect() for other arguments, return value and exceptions. i����i s! Timeout exceeded in expect_any().g-C ��6?R s
N( RP R% R& R� R^ R] t lenR t searcht endt startR/ R+ RR RS R R� R! R� R t eof_indexR t
timeout_index(
R
RP R% R^ R� t incomingt freshlenRA R� RC ( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyR� A sr
# # c C s_ t t d d � } t j d d d d d � } t j | j � | | � } t j d | � d d !S( sm This returns the terminal window size of the child tty. The return
value is a tuple of (rows, cols). t
TIOCGWINSZl ht t HHHHi i ( t getattrR� t structt packt fcntlt ioctlRw t unpack( R
R� Rp t x( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyt
getwinsize� s c C s_ t t d d � } | d k r' d } n t j d | | d d � } t j | j � | | � d S( s= This sets the terminal window size of the child tty. This will cause
a SIGWINCH signal to be sent to the child. This does not change the
physical window size. It changes the size reported to TTY-aware
applications like vi or curses -- applications that respond to the
SIGWINCH signal. t
TIOCSWINSZigt�l gt R� i N( R R� R R R R Rw ( R
R� R� R Rp ( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyRx � s
i c C s� | j j | j � | j j � d | _ t j | j � } t j | j � z | j | | | � Wd t j | j t j
| � Xd S( ss This gives control of the child process to the interactive user (the
human at the keyboard). Keystrokes are sent to the child process, and
the stdout and stderr output of the child process is printed. This
simply echos the child stdout and child stderr to the real stdout and
it echos the real stdin to the child stdin. When the user types the
escape_character this method will stop. The default for
escape_character is ^]. This should not be confused with ASCII 27 --
the ESC character. ASCII 29 was chosen for historical merit because
this is the character used by 'telnet' as the escape character. The
escape_character will not be sent to the child process.
You may pass in optional input and output filter functions. These
functions should take a string and return a string. The output_filter
will be passed all the output from the child process. The input_filter
will be passed all the keyboard input from the user. The input_filter
is run BEFORE the check for the escape_character.
Note that if you change the window size of the parent the SIGWINCH
signal will not be passed through to the child. If you want the child
window size to change when the parent's window size changes then do
something like the following example::
import pexpect, struct, fcntl, termios, signal, sys
def sigwinch_passthrough (sig, data):
s = struct.pack("HHHH", 0, 0, 0, 0)
a = struct.unpack('hhhh', fcntl.ioctl(sys.stdout.fileno(), termios.TIOCGWINSZ , s))
global p
p.setwinsize(a[0],a[1])
p = pexpect.spawn('/bin/bash') # Note this is global and used in sigwinch_passthrough.
signal.signal(signal.SIGWINCH, sigwinch_passthrough)
p.interact()
R N( R3 R� R] R4 t ttyR� RK t setrawt _spawn__interact_copyR� t TCSAFLUSH( R
t escape_charactert input_filtert
output_filtert mode( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyt interact� s $
c C s? x8 | d k r: | j � r: t j | | � } | | } q Wd S( s/ This is used by the interact() method.
R N( R� R} R� ( R
R� t dataR� ( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyt __interact_writen� s c C s t j | d � S( s/ This is used by the interact() method.
i� ( R} R� ( R
R� ( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyt __interact_read� s c C sD x=| j � r?| j | j | j g g g � \ } } } | j | k r� | j | j � } | ro | | � } n | j d k r� | j j | � | j j � n t j | j
| � n | j | k r | j | j � } | r� | | � } n | j | � } | d k r&| | } | j | j | � Pn | j | j | � q q Wd S( s/ This is used by the interact() method.
i����N(
R� R� RY RK t _spawn__interact_readR" R& R� R4 R} RL t rfindt _spawn__interact_writen( R
R
R R R� R� RC R R� ( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyt __interact_copy� s( *
c C s� | d k r t j � | } n x� t r� y t j | | | | � SWq" t j k
r� } | d t j k r� | d k r� | t j � } | d k r� g g g f Sq� q� � q" Xq" Wd S( s� This is a wrapper around select.select() that ignores signals. If
select.select raises a select.error exception and errno is an EINTR
error then it is ignored. Mainly this is used to ignore sigwinch
(terminal resize). i N( R& R� R t selectt errorR� t EINTR( R
t iwtdt owtdt ewtdR% R� RC ( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyt __select s c C s t d � � d S( so This method is no longer supported or allowed. I don't like getters
and setters without a good reason. sb This method is no longer supported or allowed. Just assign a value to the maxread member variable.N( R ( R
R! ( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyt
setmaxread s c C s t d � � d S( s7 This method is no longer supported or allowed.
sb This method is no longer supported or allowed. Just assign a value to the logfile member variable.N( R ( R
t
fileobject( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyt setlog" s N(4 R R R R& R Rn R
Rl Rv R� Rw R R6 R4 R� R� R� R� R� R� R� R� R� R� R� R� R0 R� R� R� R� R� R R� R� R� R� R� R) R� R� R� R Rx R� R R R R R� R R" ( ( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyR s\ � " T ' ' )N
" ) ?
0PH
. R� c B s, e Z d Z d � Z d � Z d d � Z RS( s� This is a plain string search helper for the spawn.expect_any() method.
Attributes:
eof_index - index of EOF, or -1
timeout_index - index of TIMEOUT, or -1
After a successful match by the search() method the following attributes
are available:
start - index into the buffer, first byte of match
end - index into the buffer, first byte after match
match - the matching string itself
c C s� d | _ d | _ g | _ xu t t t | � � | � D]X \ } } | t k r^ | | _ q7 n | t k ry | | _ q7 n | j j | | f � q7 Wd S( s� This creates an instance of searcher_string. This argument 'strings'
may be a list; a sequence of strings; or the EOF or TIMEOUT types. i����N( R� R� t _stringst zipR| R� R R R. ( R
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timeout_index - index of TIMEOUT, or -1
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are available:
start - index into the buffer, first byte of match
end - index into the buffer, first byte after match
match - the re.match object returned by a succesful re.search
c C s� d | _ d | _ g | _ xu t t t | � � | � D]X \ } } | t k r^ | | _ q7 n | t k ry | | _ q7 n | j j | | f � q7 Wd S( s� This creates an instance that searches for 'patterns' Where
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} | } | } qJ qJ W| | k r� d S| | _ | | _ | j j � | _ | S( s� This searches 'buffer' for the first occurence of one of the regular
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See class spawn for the 'searchwindowsize' argument.
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R& R� ( ( ( s+ /usr/lib/python2.7/site-packages/pexpect.pyR� � s c C s� t j j | � d k r4 t j | t j � r4 | Sn t j j d � sZ t j d d k rf t j } n
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C s� g } d } d } d } d } d } d } | } x.| D]&} | | k sU | | k r� | d k rj | } q]| d k r | } q]| d k r� | } q]| j � r� | | k r� d
q� | j | � d } | } q]| | } | } q7 | | k r| | } | } q7 | | k r/| d k r"| } q]| | } q7 | | k r7 | d k rP| } q]| | } q7 q7 W| d k r}| j | � n | S( s This splits a command line into a list of arguments. It splits arguments
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