sqlmap/lib/core/subprocessng.py at master · getcode2git/sqlmap · GitHub

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#!/usr/bin/env python

"""

See the file 'doc/COPYING' for copying permission

"""

import errno

import os

import subprocess

import sys

import time

from lib.core.settings import IS_WIN

if IS_WIN:

try:

from win32file import ReadFile, WriteFile

from win32pipe import PeekNamedPipe

except ImportError:

pass

import msvcrt

else:

import select

import fcntl

if (sys.hexversion >> 16) >= 0x202:

FCNTL = fcntl

else:

import FCNTL

def blockingReadFromFD(fd):

# Quick twist around original Twisted function

# Blocking read from a non-blocking file descriptor

output = ""

while True:

try:

output += os.read(fd, 8192)

except (OSError, IOError), ioe:

if ioe.args[0] in (errno.EAGAIN, errno.EINTR):

# Uncomment the following line if the process seems to

# take a huge amount of cpu time

# time.sleep(0.01)

continue

else:

raise

break

if not output:

raise EOFError("fd %s has been closed." % fd)

return output

def blockingWriteToFD(fd, data):

# Another quick twist

while True:

try:

data_length = len(data)

wrote_data = os.write(fd, data)

except (OSError, IOError), io:

if io.errno in (errno.EAGAIN, errno.EINTR):

continue

else:

raise

if wrote_data < data_length:

blockingWriteToFD(fd, data[wrote_data:])

break

# the following code is taken from http://code.activestate.com/recipes/440554-module-to-allow-asynchronous-subprocess-use-on-win/

class Popen(subprocess.Popen):

def recv(self, maxsize=None):

return self._recv('stdout', maxsize)

def recv_err(self, maxsize=None):

return self._recv('stderr', maxsize)

def send_recv(self, input='', maxsize=None):

return self.send(input), self.recv(maxsize), self.recv_err(maxsize)

def get_conn_maxsize(self, which, maxsize):

if maxsize is None:

maxsize = 1024

elif maxsize < 1:

maxsize = 1

return getattr(self, which), maxsize

def _close(self, which):

getattr(self, which).close()

setattr(self, which, None)

if subprocess.mswindows:

def send(self, input):

if not self.stdin:

return None

try:

x = msvcrt.get_osfhandle(self.stdin.fileno())

(errCode, written) = WriteFile(x, input)

except ValueError:

return self._close('stdin')

except (subprocess.pywintypes.error, Exception), why:

if why[0] in (109, errno.ESHUTDOWN):

return self._close('stdin')

raise

return written

def _recv(self, which, maxsize):

conn, maxsize = self.get_conn_maxsize(which, maxsize)

if conn is None:

return None

try:

x = msvcrt.get_osfhandle(conn.fileno())

(read, nAvail, nMessage) = PeekNamedPipe(x, 0)

if maxsize < nAvail:

nAvail = maxsize

if nAvail > 0:

(errCode, read) = ReadFile(x, nAvail, None)

except (ValueError, NameError):

return self._close(which)

except (subprocess.pywintypes.error, Exception), why:

if why[0] in (109, errno.ESHUTDOWN):

return self._close(which)

raise

if self.universal_newlines:

read = self._translate_newlines(read)

return read

else:

def send(self, input):

if not self.stdin:

return None

if not select.select([], [self.stdin], [], 0)[1]:

return 0

try:

written = os.write(self.stdin.fileno(), input)

except OSError, why:

if why[0] == errno.EPIPE: # broken pipe

return self._close('stdin')

raise

return written

def _recv(self, which, maxsize):

conn, maxsize = self.get_conn_maxsize(which, maxsize)

if conn is None:

return None

flags = fcntl.fcntl(conn, fcntl.F_GETFL)

if not conn.closed:

fcntl.fcntl(conn, fcntl.F_SETFL, flags | os.O_NONBLOCK)

try:

if not select.select([conn], [], [], 0)[0]:

return ''

r = conn.read(maxsize)

if not r:

return self._close(which)

if self.universal_newlines:

r = self._translate_newlines(r)

return r

finally:

if not conn.closed:

fcntl.fcntl(conn, fcntl.F_SETFL, flags)

def recv_some(p, t=.1, e=1, tr=5, stderr=0):

if tr < 1:

tr = 1

x = time.time() + t

y = []

r = ''

if stderr:

pr = p.recv_err

else:

pr = p.recv

while time.time() < x or r:

r = pr()

if r is None:

break

elif r:

y.append(r)

else:

time.sleep(max((x - time.time()) / tr, 0))

return ''.join(y)

def send_all(p, data):

if not data:

return

while len(data):

sent = p.send(data)

if not isinstance(sent, int):

break

data = buffer(data, sent)

sqlmap/lib/core/subprocessng.py at master · getcode2git/sqlmap · GitHub

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