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# Source Generated with Decompyle++
# File: in.pyc (Python 2.7)
'''subprocess - Subprocesses with accessible I/O streams
This module allows you to spawn processes, connect to their
input/output/error pipes, and obtain their return codes. This module
intends to replace several other, older modules and functions, like:
os.system
os.spawn*
os.popen*
popen2.*
commands.*
Information about how the subprocess module can be used to replace these
modules and functions can be found below.
Using the subprocess module
===========================
This module defines one class called Popen:
class Popen(args, bufsize=0, executable=None,
stdin=None, stdout=None, stderr=None,
preexec_fn=None, close_fds=False, shell=False,
cwd=None, env=None, universal_newlines=False,
startupinfo=None, creationflags=0):
Arguments are:
args should be a string, or a sequence of program arguments. The
program to execute is normally the first item in the args sequence or
string, but can be explicitly set by using the executable argument.
On UNIX, with shell=False (default): In this case, the Popen class
uses os.execvp() to execute the child program. args should normally
be a sequence. A string will be treated as a sequence with the string
as the only item (the program to execute).
On UNIX, with shell=True: If args is a string, it specifies the
command string to execute through the shell. If args is a sequence,
the first item specifies the command string, and any additional items
will be treated as additional shell arguments.
On Windows: the Popen class uses CreateProcess() to execute the child
program, which operates on strings. If args is a sequence, it will be
converted to a string using the list2cmdline method. Please note that
not all MS Windows applications interpret the command line the same
way: The list2cmdline is designed for applications using the same
rules as the MS C runtime.
bufsize, if given, has the same meaning as the corresponding argument
to the built-in open() function: 0 means unbuffered, 1 means line
buffered, any other positive value means use a buffer of
(approximately) that size. A negative bufsize means to use the system
default, which usually means fully buffered. The default value for
bufsize is 0 (unbuffered).
stdin, stdout and stderr specify the executed programs\' standard
input, standard output and standard error file handles, respectively.
Valid values are PIPE, an existing file descriptor (a positive
integer), an existing file object, and None. PIPE indicates that a
new pipe to the child should be created. With None, no redirection
will occur; the child\'s file handles will be inherited from the
parent. Additionally, stderr can be STDOUT, which indicates that the
stderr data from the applications should be captured into the same
file handle as for stdout.
If preexec_fn is set to a callable object, this object will be called
in the child process just before the child is executed.
If close_fds is true, all file descriptors except 0, 1 and 2 will be
closed before the child process is executed.
if shell is true, the specified command will be executed through the
shell.
If cwd is not None, the current directory will be changed to cwd
before the child is executed.
If env is not None, it defines the environment variables for the new
process.
If universal_newlines is true, the file objects stdout and stderr are
opened as a text files, but lines may be terminated by any of \'\\n\',
the Unix end-of-line convention, \'\\r\', the Macintosh convention or
\'\\r\\n\', the Windows convention. All of these external representations
are seen as \'\\n\' by the Python program. Note: This feature is only
available if Python is built with universal newline support (the
default). Also, the newlines attribute of the file objects stdout,
stdin and stderr are not updated by the communicate() method.
The startupinfo and creationflags, if given, will be passed to the
underlying CreateProcess() function. They can specify things such as
appearance of the main window and priority for the new process.
(Windows only)
This module also defines some shortcut functions:
call(*popenargs, **kwargs):
Run command with arguments. Wait for command to complete, then
return the returncode attribute.
The arguments are the same as for the Popen constructor. Example:
retcode = call(["ls", "-l"])
check_call(*popenargs, **kwargs):
Run command with arguments. Wait for command to complete. If the
exit code was zero then return, otherwise raise
CalledProcessError. The CalledProcessError object will have the
return code in the returncode attribute.
The arguments are the same as for the Popen constructor. Example:
check_call(["ls", "-l"])
check_output(*popenargs, **kwargs):
Run command with arguments and return its output as a byte string.
If the exit code was non-zero it raises a CalledProcessError. The
CalledProcessError object will have the return code in the returncode
attribute and output in the output attribute.
The arguments are the same as for the Popen constructor. Example:
output = check_output(["ls", "-l", "/dev/null"])
Exceptions
----------
Exceptions raised in the child process, before the new program has
started to execute, will be re-raised in the parent. Additionally,
the exception object will have one extra attribute called
\'child_traceback\', which is a string containing traceback information
from the child\'s point of view.
The most common exception raised is OSError. This occurs, for
example, when trying to execute a non-existent file. Applications
should prepare for OSErrors.
A ValueError will be raised if Popen is called with invalid arguments.
check_call() and check_output() will raise CalledProcessError, if the
called process returns a non-zero return code.
Security
--------
Unlike some other popen functions, this implementation will never call
/bin/sh implicitly. This means that all characters, including shell
metacharacters, can safely be passed to child processes.
Popen objects
=============
Instances of the Popen class have the following methods:
poll()
Check if child process has terminated. Returns returncode
attribute.
wait()
Wait for child process to terminate. Returns returncode attribute.
communicate(input=None)
Interact with process: Send data to stdin. Read data from stdout
and stderr, until end-of-file is reached. Wait for process to
terminate. The optional input argument should be a string to be
sent to the child process, or None, if no data should be sent to
the child.
communicate() returns a tuple (stdout, stderr).
Note: The data read is buffered in memory, so do not use this
method if the data size is large or unlimited.
The following attributes are also available:
stdin
If the stdin argument is PIPE, this attribute is a file object
that provides input to the child process. Otherwise, it is None.
stdout
If the stdout argument is PIPE, this attribute is a file object
that provides output from the child process. Otherwise, it is
None.
stderr
If the stderr argument is PIPE, this attribute is file object that
provides error output from the child process. Otherwise, it is
None.
pid
The process ID of the child process.
returncode
The child return code. A None value indicates that the process
hasn\'t terminated yet. A negative value -N indicates that the
child was terminated by signal N (UNIX only).
Replacing older functions with the subprocess module
====================================================
In this section, "a ==> b" means that b can be used as a replacement
for a.
Note: All functions in this section fail (more or less) silently if
the executed program cannot be found; this module raises an OSError
exception.
In the following examples, we assume that the subprocess module is
imported with "from subprocess import *".
Replacing /bin/sh shell backquote
---------------------------------
output=`mycmd myarg`
==>
output = Popen(["mycmd", "myarg"], stdout=PIPE).communicate()[0]
Replacing shell pipe line
-------------------------
output=`dmesg | grep hda`
==>
p1 = Popen(["dmesg"], stdout=PIPE)
p2 = Popen(["grep", "hda"], stdin=p1.stdout, stdout=PIPE)
output = p2.communicate()[0]
Replacing os.system()
---------------------
sts = os.system("mycmd" + " myarg")
==>
p = Popen("mycmd" + " myarg", shell=True)
pid, sts = os.waitpid(p.pid, 0)
Note:
* Calling the program through the shell is usually not required.
* It\'s easier to look at the returncode attribute than the
exitstatus.
A more real-world example would look like this:
try:
retcode = call("mycmd" + " myarg", shell=True)
if retcode < 0:
print >>sys.stderr, "Child was terminated by signal", -retcode
else:
print >>sys.stderr, "Child returned", retcode
except OSError, e:
print >>sys.stderr, "Execution failed:", e
Replacing os.spawn*
-------------------
P_NOWAIT example:
pid = os.spawnlp(os.P_NOWAIT, "/bin/mycmd", "mycmd", "myarg")
==>
pid = Popen(["/bin/mycmd", "myarg"]).pid
P_WAIT example:
retcode = os.spawnlp(os.P_WAIT, "/bin/mycmd", "mycmd", "myarg")
==>
retcode = call(["/bin/mycmd", "myarg"])
Vector example:
os.spawnvp(os.P_NOWAIT, path, args)
==>
Popen([path] + args[1:])
Environment example:
os.spawnlpe(os.P_NOWAIT, "/bin/mycmd", "mycmd", "myarg", env)
==>
Popen(["/bin/mycmd", "myarg"], env={"PATH": "/usr/bin"})
Replacing os.popen*
-------------------
pipe = os.popen("cmd", mode=\'r\', bufsize)
==>
pipe = Popen("cmd", shell=True, bufsize=bufsize, stdout=PIPE).stdout
pipe = os.popen("cmd", mode=\'w\', bufsize)
==>
pipe = Popen("cmd", shell=True, bufsize=bufsize, stdin=PIPE).stdin
(child_stdin, child_stdout) = os.popen2("cmd", mode, bufsize)
==>
p = Popen("cmd", shell=True, bufsize=bufsize,
stdin=PIPE, stdout=PIPE, close_fds=True)
(child_stdin, child_stdout) = (p.stdin, p.stdout)
(child_stdin,
child_stdout,
child_stderr) = os.popen3("cmd", mode, bufsize)
==>
p = Popen("cmd", shell=True, bufsize=bufsize,
stdin=PIPE, stdout=PIPE, stderr=PIPE, close_fds=True)
(child_stdin,
child_stdout,
child_stderr) = (p.stdin, p.stdout, p.stderr)
(child_stdin, child_stdout_and_stderr) = os.popen4("cmd", mode,
bufsize)
==>
p = Popen("cmd", shell=True, bufsize=bufsize,
stdin=PIPE, stdout=PIPE, stderr=STDOUT, close_fds=True)
(child_stdin, child_stdout_and_stderr) = (p.stdin, p.stdout)
On Unix, os.popen2, os.popen3 and os.popen4 also accept a sequence as
the command to execute, in which case arguments will be passed
directly to the program without shell intervention. This usage can be
replaced as follows:
(child_stdin, child_stdout) = os.popen2(["/bin/ls", "-l"], mode,
bufsize)
==>
p = Popen(["/bin/ls", "-l"], bufsize=bufsize, stdin=PIPE, stdout=PIPE)
(child_stdin, child_stdout) = (p.stdin, p.stdout)
Return code handling translates as follows:
pipe = os.popen("cmd", \'w\')
...
rc = pipe.close()
if rc is not None and rc % 256:
print "There were some errors"
==>
process = Popen("cmd", \'w\', shell=True, stdin=PIPE)
...
process.stdin.close()
if process.wait() != 0:
print "There were some errors"
Replacing popen2.*
------------------
(child_stdout, child_stdin) = popen2.popen2("somestring", bufsize, mode)
==>
p = Popen(["somestring"], shell=True, bufsize=bufsize
stdin=PIPE, stdout=PIPE, close_fds=True)
(child_stdout, child_stdin) = (p.stdout, p.stdin)
On Unix, popen2 also accepts a sequence as the command to execute, in
which case arguments will be passed directly to the program without
shell intervention. This usage can be replaced as follows:
(child_stdout, child_stdin) = popen2.popen2(["mycmd", "myarg"], bufsize,
mode)
==>
p = Popen(["mycmd", "myarg"], bufsize=bufsize,
stdin=PIPE, stdout=PIPE, close_fds=True)
(child_stdout, child_stdin) = (p.stdout, p.stdin)
The popen2.Popen3 and popen2.Popen4 basically works as subprocess.Popen,
except that:
* subprocess.Popen raises an exception if the execution fails
* the capturestderr argument is replaced with the stderr argument.
* stdin=PIPE and stdout=PIPE must be specified.
* popen2 closes all filedescriptors by default, but you have to specify
close_fds=True with subprocess.Popen.
'''
import sys
mswindows = sys.platform == 'win32'
import os
import types
import traceback
import gc
import signal
import errno
class CalledProcessError(Exception):
'''This exception is raised when a process run by check_call() or
check_output() returns a non-zero exit status.
The exit status will be stored in the returncode attribute;
check_output() will also store the output in the output attribute.
'''
def __init__(self, returncode, cmd, output = None):
self.returncode = returncode
self.cmd = cmd
self.output = output
def __str__(self):
return "Command '%s' returned non-zero exit status %d" % (self.cmd, self.returncode)
if mswindows:
import threading
import msvcrt
import _subprocess
class STARTUPINFO:
dwFlags = 0
hStdInput = None
hStdOutput = None
hStdError = None
wShowWindow = 0
class pywintypes:
error = IOError
else:
import select
_has_poll = hasattr(select, 'poll')
import fcntl
import pickle
_PIPE_BUF = getattr(select, 'PIPE_BUF', 512)
__all__ = [
'Popen',
'PIPE',
'STDOUT',
'call',
'check_call',
'check_output',
'CalledProcessError']
if mswindows:
from _subprocess import CREATE_NEW_CONSOLE, CREATE_NEW_PROCESS_GROUP, STD_INPUT_HANDLE, STD_OUTPUT_HANDLE, STD_ERROR_HANDLE, SW_HIDE, STARTF_USESTDHANDLES, STARTF_USESHOWWINDOW
__all__.extend([
'CREATE_NEW_CONSOLE',
'CREATE_NEW_PROCESS_GROUP',
'STD_INPUT_HANDLE',
'STD_OUTPUT_HANDLE',
'STD_ERROR_HANDLE',
'SW_HIDE',
'STARTF_USESTDHANDLES',
'STARTF_USESHOWWINDOW'])
try:
MAXFD = os.sysconf('SC_OPEN_MAX')
except:
MAXFD = 256
_active = []
def _cleanup():
for inst in _active[:]:
res = inst._internal_poll(_deadstate = sys.maxint)
if res is not None:
try:
_active.remove(inst)
except ValueError:
pass
PIPE = -1
STDOUT = -2
def _eintr_retry_call(func, *args):
while True:
try:
return func(*args)
continue
except (OSError, IOError):
e = None
if e.errno == errno.EINTR:
continue
raise
continue
def _args_from_interpreter_flags():
'''Return a list of command-line arguments reproducing the current
settings in sys.flags and sys.warnoptions.'''
flag_opt_map = {
'debug': 'd',
'optimize': 'O',
'dont_write_bytecode': 'B',
'no_user_site': 's',
'no_site': 'S',
'ignore_environment': 'E',
'verbose': 'v',
'bytes_warning': 'b',
'hash_randomization': 'R',
'py3k_warning': '3' }
args = []
for flag, opt in flag_opt_map.items():
v = getattr(sys.flags, flag)
if v > 0:
args.append('-' + opt * v)
continue
for opt in sys.warnoptions:
args.append('-W' + opt)
return args
def call(*popenargs, **kwargs):
'''Run command with arguments. Wait for command to complete, then
return the returncode attribute.
The arguments are the same as for the Popen constructor. Example:
retcode = call(["ls", "-l"])
'''
return Popen(*popenargs, **kwargs).wait()
def check_call(*popenargs, **kwargs):
'''Run command with arguments. Wait for command to complete. If
the exit code was zero then return, otherwise raise
CalledProcessError. The CalledProcessError object will have the
return code in the returncode attribute.
The arguments are the same as for the Popen constructor. Example:
check_call(["ls", "-l"])
'''
retcode = call(*popenargs, **kwargs)
if retcode:
cmd = kwargs.get('args')
if cmd is None:
cmd = popenargs[0]
raise CalledProcessError(retcode, cmd)
return 0
def check_output(*popenargs, **kwargs):
'''Run command with arguments and return its output as a byte string.
If the exit code was non-zero it raises a CalledProcessError. The
CalledProcessError object will have the return code in the returncode
attribute and output in the output attribute.
The arguments are the same as for the Popen constructor. Example:
>>> check_output(["ls", "-l", "/dev/null"])
\'crw-rw-rw- 1 root root 1, 3 Oct 18 2007 /dev/null\\n\'
The stdout argument is not allowed as it is used internally.
To capture standard error in the result, use stderr=STDOUT.
>>> check_output(["/bin/sh", "-c",
... "ls -l non_existent_file ; exit 0"],
... stderr=STDOUT)
\'ls: non_existent_file: No such file or directory\\n\'
'''
if 'stdout' in kwargs:
raise ValueError('stdout argument not allowed, it will be overridden.')
process = Popen(stdout = PIPE, *popenargs, **kwargs)
(output, unused_err) = process.communicate()
retcode = process.poll()
if retcode:
cmd = kwargs.get('args')
if cmd is None:
cmd = popenargs[0]
raise CalledProcessError(retcode, cmd, output = output)
return output
def list2cmdline(seq):
'''
Translate a sequence of arguments into a command line
string, using the same rules as the MS C runtime:
1) Arguments are delimited by white space, which is either a
space or a tab.
2) A string surrounded by double quotation marks is
interpreted as a single argument, regardless of white space
contained within. A quoted string can be embedded in an
argument.
3) A double quotation mark preceded by a backslash is
interpreted as a literal double quotation mark.
4) Backslashes are interpreted literally, unless they
immediately precede a double quotation mark.
5) If backslashes immediately precede a double quotation mark,
every pair of backslashes is interpreted as a literal
backslash. If the number of backslashes is odd, the last
backslash escapes the next double quotation mark as
described in rule 3.
'''
result = []
needquote = False
for arg in seq:
bs_buf = []
needquote = None if result else not arg
if needquote:
result.append('"')
for c in arg:
if c == '\\':
bs_buf.append(c)
continue
if c == '"':
result.append('\\' * len(bs_buf) * 2)
bs_buf = []
result.append('\\"')
continue
if bs_buf:
result.extend(bs_buf)
bs_buf = []
result.append(c)
if bs_buf:
result.extend(bs_buf)
if needquote:
result.extend(bs_buf)
result.append('"')
continue
return ''.join(result)
class Popen(object):
def __init__(self, args, bufsize = 0, executable = None, stdin = None, stdout = None, stderr = None, preexec_fn = None, close_fds = False, shell = False, cwd = None, env = None, universal_newlines = False, startupinfo = None, creationflags = 0):
'''Create new Popen instance.'''
_cleanup()
self._child_created = False
if not isinstance(bufsize, (int, long)):
raise TypeError('bufsize must be an integer')
if mswindows:
if preexec_fn is not None:
raise ValueError('preexec_fn is not supported on Windows platforms')
if close_fds:
if stdin is not None and stdout is not None or stderr is not None:
raise ValueError('close_fds is not supported on Windows platforms if you redirect stdin/stdout/stderr')
elif startupinfo is not None:
raise ValueError('startupinfo is only supported on Windows platforms')
if creationflags != 0:
raise ValueError('creationflags is only supported on Windows platforms')
self.stdin = None
self.stdout = None
self.stderr = None
self.pid = None
self.returncode = None
self.universal_newlines = universal_newlines
(p2cread, p2cwrite, c2pread, c2pwrite, errread, errwrite) = ()
to_close = self._get_handles(stdin, stdout, stderr)
try:
self._execute_child(args, executable, preexec_fn, close_fds, cwd, env, universal_newlines, startupinfo, creationflags, shell, to_close, p2cread, p2cwrite, c2pread, c2pwrite, errread, errwrite)
except Exception:
(exc_type, exc_value, exc_trace) = sys.exc_info()
for fd in to_close:
try:
if mswindows:
fd.Close()
else:
os.close(fd)
continue
except EnvironmentError:
continue
raise exc_type, exc_value, exc_trace
if mswindows:
if p2cwrite is not None:
p2cwrite = msvcrt.open_osfhandle(p2cwrite.Detach(), 0)
if c2pread is not None:
c2pread = msvcrt.open_osfhandle(c2pread.Detach(), 0)
if errread is not None:
errread = msvcrt.open_osfhandle(errread.Detach(), 0)
if p2cwrite is not None:
self.stdin = os.fdopen(p2cwrite, 'wb', bufsize)
if c2pread is not None:
if universal_newlines:
self.stdout = os.fdopen(c2pread, 'rU', bufsize)
else:
self.stdout = os.fdopen(c2pread, 'rb', bufsize)
if errread is not None:
if universal_newlines:
self.stderr = os.fdopen(errread, 'rU', bufsize)
else:
self.stderr = os.fdopen(errread, 'rb', bufsize)
return None
def _translate_newlines(self, data):
data = data.replace('\r\n', '\n')
data = data.replace('\r', '\n')
return data
def __del__(self, _maxint = sys.maxint, _active = _active):
if not getattr(self, '_child_created', False):
return None
None._internal_poll(_deadstate = _maxint)
if self.returncode is None and _active is not None:
_active.append(self)
def communicate(self, input = None):
'''Interact with process: Send data to stdin. Read data from
stdout and stderr, until end-of-file is reached. Wait for
process to terminate. The optional input argument should be a
string to be sent to the child process, or None, if no data
should be sent to the child.
communicate() returns a tuple (stdout, stderr).'''
if [
self.stdin,
self.stdout,
self.stderr].count(None) >= 2:
stdout = None
stderr = None
if self.stdin:
if input:
try:
self.stdin.write(input)
except IOError:
e = None
if e.errno != errno.EPIPE and e.errno != errno.EINVAL:
raise
self.stdin.close()
elif self.stdout:
stdout = _eintr_retry_call(self.stdout.read)
self.stdout.close()
elif self.stderr:
stderr = _eintr_retry_call(self.stderr.read)
self.stderr.close()
self.wait()
return (stdout, stderr)
return None._communicate(input)
def poll(self):
return self._internal_poll()
if mswindows:
def _get_handles(self, stdin, stdout, stderr):
'''Construct and return tuple with IO objects:
p2cread, p2cwrite, c2pread, c2pwrite, errread, errwrite
'''
to_close = set()
if stdin is None and stdout is None and stderr is None:
return ((None, None, None, None, None, None), to_close)
(p2cread, p2cwrite) = None
(c2pread, c2pwrite) = (None, None)
(errread, errwrite) = (None, None)
if stdin is None:
p2cread = _subprocess.GetStdHandle(_subprocess.STD_INPUT_HANDLE)
if p2cread is None:
(p2cread, _) = _subprocess.CreatePipe(None, 0)
elif stdin == PIPE:
(p2cread, p2cwrite) = _subprocess.CreatePipe(None, 0)
elif isinstance(stdin, int):
p2cread = msvcrt.get_osfhandle(stdin)
else:
p2cread = msvcrt.get_osfhandle(stdin.fileno())
p2cread = self._make_inheritable(p2cread)
to_close.add(p2cread)
if stdin == PIPE:
to_close.add(p2cwrite)
if stdout is None:
c2pwrite = _subprocess.GetStdHandle(_subprocess.STD_OUTPUT_HANDLE)
if c2pwrite is None:
(_, c2pwrite) = _subprocess.CreatePipe(None, 0)
elif stdout == PIPE:
(c2pread, c2pwrite) = _subprocess.CreatePipe(None, 0)
elif isinstance(stdout, int):
c2pwrite = msvcrt.get_osfhandle(stdout)
else:
c2pwrite = msvcrt.get_osfhandle(stdout.fileno())
c2pwrite = self._make_inheritable(c2pwrite)
to_close.add(c2pwrite)
if stdout == PIPE:
to_close.add(c2pread)
if stderr is None:
errwrite = _subprocess.GetStdHandle(_subprocess.STD_ERROR_HANDLE)
if errwrite is None:
(_, errwrite) = _subprocess.CreatePipe(None, 0)
elif stderr == PIPE:
(errread, errwrite) = _subprocess.CreatePipe(None, 0)
elif stderr == STDOUT:
errwrite = c2pwrite
elif isinstance(stderr, int):
errwrite = msvcrt.get_osfhandle(stderr)
else:
errwrite = msvcrt.get_osfhandle(stderr.fileno())
errwrite = self._make_inheritable(errwrite)
to_close.add(errwrite)
if stderr == PIPE:
to_close.add(errread)
return ((p2cread, p2cwrite, c2pread, c2pwrite, errread, errwrite), to_close)
def _make_inheritable(self, handle):
'''Return a duplicate of handle, which is inheritable'''
return _subprocess.DuplicateHandle(_subprocess.GetCurrentProcess(), handle, _subprocess.GetCurrentProcess(), 0, 1, _subprocess.DUPLICATE_SAME_ACCESS)
def _find_w9xpopen(self):
'''Find and return absolut path to w9xpopen.exe'''
w9xpopen = os.path.join(os.path.dirname(_subprocess.GetModuleFileName(0)), 'w9xpopen.exe')
if not os.path.exists(w9xpopen):
w9xpopen = os.path.join(os.path.dirname(sys.exec_prefix), 'w9xpopen.exe')
if not os.path.exists(w9xpopen):
raise RuntimeError('Cannot locate w9xpopen.exe, which is needed for Popen to work with your shell or platform.')
return w9xpopen
def _execute_child(self, args, executable, preexec_fn, close_fds, cwd, env, universal_newlines, startupinfo, creationflags, shell, to_close, p2cread, p2cwrite, c2pread, c2pwrite, errread, errwrite):
'''Execute program (MS Windows version)'''
if not isinstance(args, types.StringTypes):
args = list2cmdline(args)
if startupinfo is None:
startupinfo = STARTUPINFO()
if None not in (p2cread, c2pwrite, errwrite):
startupinfo.dwFlags |= _subprocess.STARTF_USESTDHANDLES
startupinfo.hStdInput = p2cread
startupinfo.hStdOutput = c2pwrite
startupinfo.hStdError = errwrite
if shell:
startupinfo.dwFlags |= _subprocess.STARTF_USESHOWWINDOW
startupinfo.wShowWindow = _subprocess.SW_HIDE
comspec = os.environ.get('COMSPEC', 'cmd.exe')
args = '{} /c "{}"'.format(comspec, args)
if _subprocess.GetVersion() >= 0x80000000L or os.path.basename(comspec).lower() == 'command.com':
w9xpopen = self._find_w9xpopen()
args = '"%s" %s' % (w9xpopen, args)
creationflags |= _subprocess.CREATE_NEW_CONSOLE
def _close_in_parent(fd):
fd.Close()
to_close.remove(fd)
try:
(hp, ht, pid, tid) = _subprocess.CreateProcess(executable, args, None, None, int(not close_fds), creationflags, env, cwd, startupinfo)
except pywintypes.error:
(startupinfo,)
e = (startupinfo,)
startupinfo
raise WindowsError(*e.args)
finally:
if p2cread is not None:
_close_in_parent(p2cread)
if c2pwrite is not None:
_close_in_parent(c2pwrite)
if errwrite is not None:
_close_in_parent(errwrite)
self._child_created = True
self._handle = hp
self.pid = pid
ht.Close()
def _internal_poll(self, _deadstate = None, _WaitForSingleObject = _subprocess.WaitForSingleObject, _WAIT_OBJECT_0 = _subprocess.WAIT_OBJECT_0, _GetExitCodeProcess = _subprocess.GetExitCodeProcess):
'''Check if child process has terminated. Returns returncode
attribute.
This method is called by __del__, so it can only refer to objects
in its local scope.
'''
if self.returncode is None and _WaitForSingleObject(self._handle, 0) == _WAIT_OBJECT_0:
self.returncode = _GetExitCodeProcess(self._handle)
return self.returncode
def wait(self):
'''Wait for child process to terminate. Returns returncode
attribute.'''
if self.returncode is None:
_subprocess.WaitForSingleObject(self._handle, _subprocess.INFINITE)
self.returncode = _subprocess.GetExitCodeProcess(self._handle)
return self.returncode
def _readerthread(self, fh, buffer):
buffer.append(fh.read())
def _communicate(self, input):
stdout = None
stderr = None
if self.stdout:
stdout = []
stdout_thread = threading.Thread(target = self._readerthread, args = (self.stdout, stdout))
stdout_thread.setDaemon(True)
stdout_thread.start()
if self.stderr:
stderr = []
stderr_thread = threading.Thread(target = self._readerthread, args = (self.stderr, stderr))
stderr_thread.setDaemon(True)
stderr_thread.start()
if self.stdin:
if input is not None:
try:
self.stdin.write(input)
except IOError:
e = None
if e.errno != errno.EPIPE:
raise
self.stdin.close()
if self.stdout:
stdout_thread.join()
if self.stderr:
stderr_thread.join()
if stdout is not None:
stdout = stdout[0]
if stderr is not None:
stderr = stderr[0]
if self.universal_newlines and hasattr(file, 'newlines'):
if stdout:
stdout = self._translate_newlines(stdout)
if stderr:
stderr = self._translate_newlines(stderr)
self.wait()
return (stdout, stderr)
def send_signal(self, sig):
'''Send a signal to the process
'''
if sig == signal.SIGTERM:
self.terminate()
elif sig == signal.CTRL_C_EVENT:
os.kill(self.pid, signal.CTRL_C_EVENT)
elif sig == signal.CTRL_BREAK_EVENT:
os.kill(self.pid, signal.CTRL_BREAK_EVENT)
else:
raise ValueError('Unsupported signal: {}'.format(sig))
def terminate(self):
'''Terminates the process
'''
try:
_subprocess.TerminateProcess(self._handle, 1)
except OSError:
e = None
if e.winerror != 5:
raise
rc = _subprocess.GetExitCodeProcess(self._handle)
if rc == _subprocess.STILL_ACTIVE:
raise
self.returncode = rc
kill = terminate
else:
def _get_handles(self, stdin, stdout, stderr):
'''Construct and return tuple with IO objects:
p2cread, p2cwrite, c2pread, c2pwrite, errread, errwrite
'''
to_close = set()
(p2cread, p2cwrite) = (None, None)
(c2pread, c2pwrite) = (None, None)
(errread, errwrite) = (None, None)
if stdin is None:
pass
elif stdin == PIPE:
(p2cread, p2cwrite) = self.pipe_cloexec()
to_close.update((p2cread, p2cwrite))
elif isinstance(stdin, int):
p2cread = stdin
else:
p2cread = stdin.fileno()
if stdout is None:
pass
elif stdout == PIPE:
(c2pread, c2pwrite) = self.pipe_cloexec()
to_close.update((c2pread, c2pwrite))
elif isinstance(stdout, int):
c2pwrite = stdout
else:
c2pwrite = stdout.fileno()
if stderr is None:
pass
elif stderr == PIPE:
(errread, errwrite) = self.pipe_cloexec()
to_close.update((errread, errwrite))
elif stderr == STDOUT:
errwrite = c2pwrite
elif isinstance(stderr, int):
errwrite = stderr
else:
errwrite = stderr.fileno()
return ((p2cread, p2cwrite, c2pread, c2pwrite, errread, errwrite), to_close)
def _set_cloexec_flag(self, fd, cloexec = True):
try:
cloexec_flag = fcntl.FD_CLOEXEC
except AttributeError:
cloexec_flag = 1
old = fcntl.fcntl(fd, fcntl.F_GETFD)
if cloexec:
fcntl.fcntl(fd, fcntl.F_SETFD, old | cloexec_flag)
else:
fcntl.fcntl(fd, fcntl.F_SETFD, old & ~cloexec_flag)
def pipe_cloexec(self):
'''Create a pipe with FDs set CLOEXEC.'''
(r, w) = os.pipe()
self._set_cloexec_flag(r)
self._set_cloexec_flag(w)
return (r, w)
def _close_fds(self, but):
if hasattr(os, 'closerange'):
os.closerange(3, but)
os.closerange(but + 1, MAXFD)
else:
for i in xrange(3, MAXFD):
if i == but:
continue
try:
os.close(i)
continue
continue
def _execute_child(self, args, executable, preexec_fn, close_fds, cwd, env, universal_newlines, startupinfo, creationflags, shell, to_close, p2cread, p2cwrite, c2pread, c2pwrite, errread, errwrite):
'''Execute program (POSIX version)'''
if isinstance(args, types.StringTypes):
args = [
args]
else:
args = list(args)
if shell:
args = [
'/bin/sh',
'-c'] + args
if executable:
args[0] = executable
if executable is None:
executable = args[0]
def _close_in_parent(fd):
os.close(fd)
to_close.remove(fd)
(errpipe_read, errpipe_write) = self.pipe_cloexec()
# WARNING: Decompyle incomplete
def _handle_exitstatus(self, sts, _WIFSIGNALED = os.WIFSIGNALED, _WTERMSIG = os.WTERMSIG, _WIFEXITED = os.WIFEXITED, _WEXITSTATUS = os.WEXITSTATUS):
if _WIFSIGNALED(sts):
self.returncode = -_WTERMSIG(sts)
elif _WIFEXITED(sts):
self.returncode = _WEXITSTATUS(sts)
else:
raise RuntimeError('Unknown child exit status!')
def _internal_poll(self, _deadstate = None, _waitpid = os.waitpid, _WNOHANG = os.WNOHANG, _os_error = os.error, _ECHILD = errno.ECHILD):
'''Check if child process has terminated. Returns returncode
attribute.
This method is called by __del__, so it cannot reference anything
outside of the local scope (nor can any methods it calls).
'''
if self.returncode is None:
try:
(pid, sts) = _waitpid(self.pid, _WNOHANG)
if pid == self.pid:
self._handle_exitstatus(sts)
except _os_error:
e = None
if _deadstate is not None:
self.returncode = _deadstate
if e.errno == _ECHILD:
self.returncode = 0
return self.returncode
def wait(self):
'''Wait for child process to terminate. Returns returncode
attribute.'''
while self.returncode is None:
try:
(pid, sts) = _eintr_retry_call(os.waitpid, self.pid, 0)
except OSError:
e = None
if e.errno != errno.ECHILD:
raise
pid = self.pid
sts = 0
if pid == self.pid:
self._handle_exitstatus(sts)
continue
return self.returncode
def _communicate(self, input):
if self.stdin:
self.stdin.flush()
if not input:
self.stdin.close()
if _has_poll:
(stdout, stderr) = self._communicate_with_poll(input)
else:
(stdout, stderr) = self._communicate_with_select(input)
if stdout is not None:
stdout = ''.join(stdout)
if stderr is not None:
stderr = ''.join(stderr)
if self.universal_newlines and hasattr(file, 'newlines'):
if stdout:
stdout = self._translate_newlines(stdout)
if stderr:
stderr = self._translate_newlines(stderr)
self.wait()
return (stdout, stderr)
def _communicate_with_poll(self, input):
stdout = None
stderr = None
fd2file = { }
fd2output = { }
poller = select.poll()
def register_and_append(file_obj, eventmask):
poller.register(file_obj.fileno(), eventmask)
fd2file[file_obj.fileno()] = file_obj
def close_unregister_and_remove(fd):
poller.unregister(fd)
fd2file[fd].close()
fd2file.pop(fd)
if self.stdin and input:
register_and_append(self.stdin, select.POLLOUT)
select_POLLIN_POLLPRI = select.POLLIN | select.POLLPRI
if self.stdout:
register_and_append(self.stdout, select_POLLIN_POLLPRI)
if self.stderr:
register_and_append(self.stderr, select_POLLIN_POLLPRI)
input_offset = 0
while fd2file:
try:
ready = poller.poll()
except select.error:
fd2output[self.stdout.fileno()] = stdout = e = e = []
fd2output[self.stdout.fileno()] = stdout = e = e = []
if e.args[0] == errno.EINTR:
continue
raise
for fd, mode in ready:
close_unregister_and_remove(fd)
return (stdout, stderr)
def _communicate_with_select(self, input):
read_set = []
write_set = []
stdout = None
stderr = None
if self.stdin and input:
write_set.append(self.stdin)
if self.stdout:
read_set.append(self.stdout)
stdout = []
if self.stderr:
read_set.append(self.stderr)
stderr = []
input_offset = 0
while read_set or write_set:
try:
(rlist, wlist, xlist) = select.select(read_set, write_set, [])
except select.error:
e = None
if e.args[0] == errno.EINTR:
continue
raise
if self.stdin in wlist:
chunk = input[input_offset:input_offset + _PIPE_BUF]
try:
bytes_written = os.write(self.stdin.fileno(), chunk)
except OSError:
e = None
if e.errno == errno.EPIPE:
self.stdin.close()
write_set.remove(self.stdin)
else:
raise
input_offset += bytes_written
if input_offset >= len(input):
self.stdin.close()
write_set.remove(self.stdin)
if self.stdout in rlist:
data = os.read(self.stdout.fileno(), 1024)
if data == '':
self.stdout.close()
read_set.remove(self.stdout)
stdout.append(data)
if self.stderr in rlist:
data = os.read(self.stderr.fileno(), 1024)
if data == '':
self.stderr.close()
read_set.remove(self.stderr)
stderr.append(data)
continue
return (stdout, stderr)
def send_signal(self, sig):
'''Send a signal to the process
'''
os.kill(self.pid, sig)
def terminate(self):
'''Terminate the process with SIGTERM
'''
self.send_signal(signal.SIGTERM)
def kill(self):
'''Kill the process with SIGKILL
'''
self.send_signal(signal.SIGKILL)
def _demo_posix():
plist = Popen([
'ps'], stdout = PIPE).communicate()[0]
print 'Process list:'
print plist
if os.getuid() == 0:
p = Popen([
'id'], preexec_fn = (lambda : os.setuid(100)))
p.wait()
print "Looking for 'hda'..."
p1 = Popen([
'dmesg'], stdout = PIPE)
p2 = Popen([
'grep',
'hda'], stdin = p1.stdout, stdout = PIPE)
print repr(p2.communicate()[0])
print
print 'Trying a weird file...'
try:
print Popen([
'/this/path/does/not/exist']).communicate()
except OSError:
e = None
if e.errno == errno.ENOENT:
print "The file didn't exist. I thought so..."
print 'Child traceback:'
print e.child_traceback
else:
print 'Error', e.errno
print >>sys.stderr, 'Gosh. No error.'
def _demo_windows():
print "Looking for 'PROMPT' in set output..."
p1 = Popen('set', stdout = PIPE, shell = True)
p2 = Popen('find "PROMPT"', stdin = p1.stdout, stdout = PIPE)
print repr(p2.communicate()[0])
print 'Executing calc...'
p = Popen('calc')
p.wait()
if __name__ == '__main__':
if mswindows:
_demo_windows()
else:
_demo_posix()