def _launch_pov_win(self, mainproc, pipe):
import _subprocess as _sp
cmd = [self.pov]
if self.pov_seed:
cmd.append('seed=%s' % self.pov_seed)
# The pipe HANDLE isn't inheritable, make a duplicate that is
cur_proc = _sp.GetCurrentProcess()
inh_pipe = _sp.DuplicateHandle(cur_proc, # Source process
pipe.fileno(), # HANDLE
cur_proc, # Target process
0, # Desired access
1, # Inheritable
_sp.DUPLICATE_SAME_ACCESS) # Options
# Run the POV
pov_proc = sp.Popen(cmd,
# Passing the HANDLE value here through an environment variable
# libpov will grab this and open it in fd 3
# see: include/libpov/pov.c - DLLMain
env={'POV_FD': str(int(inh_pipe))},
# stdin/out connect to the cb directly
stdin=mainproc.stdout,
stdout=mainproc.stdin)
pov_proc.wait()
def duplicate(handle, target_process=None, inheritable=False):
if target_process is None:
target_process = _subprocess.GetCurrentProcess()
return _subprocess.DuplicateHandle(
_subprocess.GetCurrentProcess(), handle, target_process,
0, inheritable, _subprocess.DUPLICATE_SAME_ACCESS
).Detach()
def _mk_inheritable(fd):
if sys.version_info[:2] > (3, 3):
if sys.platform == 'win32':
# Change to Windwos file handle
import msvcrt
fdh = msvcrt.get_osfhandle(fd)
os.set_handle_inheritable(fdh, True)
return fdh
else:
os.set_inheritable(fd, True)
return fd
elif sys.platform == 'win32':
# TODO: find a hack??
# Not yet working
import msvcrt
import _subprocess
curproc = _subprocess.GetCurrentProcess()
fdh = msvcrt.get_osfhandle(fd)
fdh = _subprocess.DuplicateHandle(
curproc,
fdh,
curproc,
0,
True, # set inheritable FLAG
_subprocess.DUPLICATE_SAME_ACCESS)
return fdh
else:
return fd
def sendHandle(conn, handle, destination_pid):
process_handle = win32.OpenProcess(win32.PROCESS_ALL_ACCESS, False,
destination_pid)
try:
new_handle = _subprocess.DuplicateHandle(
_subprocess.GetCurrentProcess(), handle, process_handle, 0,
False, _subprocess.DUPLICATE_SAME_ACCESS)
conn.send(new_handle.Detach())
finally:
win32.CloseHandle(process_handle)
def CreatePipe(*args):
rfd, wfd = os.pipe()
_current_process = win_api.GetCurrentProcess()
rhandle = win_api.DuplicateHandle(
_current_process, msvcrt.get_osfhandle(rfd),
_current_process, 0, True, win_api.DUPLICATE_SAME_ACCESS)
if sys.version_info[:2] < (3, 3):
rhandle = rhandle.Detach()
os.close(rfd)
return rhandle, wfd
def duplicate(handle, target_process=None, inheritable=False):
if target_process is None:
target_process = _subprocess.GetCurrentProcess()
h = _subprocess.DuplicateHandle(_subprocess.GetCurrentProcess(),
handle, target_process, 0, inheritable,
_subprocess.DUPLICATE_SAME_ACCESS)
if sys.version_info[0] < 3 or (sys.version_info[0] == 3
and sys.version_info[1] < 3):
h.Detach()
return h
def _make_inheritable(handle):
"""Return inheritable Handle, close the original."""
# new handles are created uninheritable by default, but they can be
# made inheritable on duplication:
current_process = _winapi.GetCurrentProcess()
dup = Handle(
_winapi.DuplicateHandle(current_process, handle, current_process,
0, True, _winapi.DUPLICATE_SAME_ACCESS))
handle.Close()
return dup
def detach(self):
# retrieve handle from process which currently owns it
if self._pid == os.getpid():
return self._handle
proc = _winapi.OpenProcess(_winapi.PROCESS_DUP_HANDLE, False,
self._pid)
try:
return _winapi.DuplicateHandle(proc, self._handle,
_winapi.GetCurrentProcess(),
self._access, False,
_winapi.DUPLICATE_CLOSE_SOURCE)
finally:
_winapi.CloseHandle(proc)
def __init__(self, handle, access, pid=None):
# duplicate handle for process with given pid
if pid is None:
pid = os.getpid()
proc = _winapi.OpenProcess(_winapi.PROCESS_DUP_HANDLE, False, pid)
try:
self._handle = _winapi.DuplicateHandle(_winapi.GetCurrentProcess(),
handle, proc, access, False,
0)
finally:
_winapi.CloseHandle(proc)
self._access = access
self._pid = pid
def setup_pipes():
global pipearg, pipein
pipeout, pipein = os.pipe()
# Prepare to pass to child process
if sys.platform == "win32":
curproc = _subprocess.GetCurrentProcess()
pipeouth = msvcrt.get_osfhandle(pipeout)
pipeoutih = _subprocess.DuplicateHandle(curproc, pipeouth, curproc, 0, 1, _subprocess.DUPLICATE_SAME_ACCESS)
pipearg = str(int(pipeoutih))
else:
pipearg = str(pipeout)
# Must close pipe input if child will block waiting for end
# Can also be closed in a preexec_fn passed to subprocess.Popen
fcntl.fcntl(pipein, fcntl.F_SETFD, fcntl.FD_CLOEXEC)
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 duplicateHandle(handle):
return _subprocess.DuplicateHandle(
_subprocess.GetCurrentProcess(), handle,
_subprocess.GetCurrentProcess(), 0, False,
_subprocess.DUPLICATE_SAME_ACCESS).Detach()
def _duplicate(handle):
target_process = _subprocess.GetCurrentProcess()
return _subprocess.DuplicateHandle(
_subprocess.GetCurrentProcess(), handle, target_process,
0, False, _subprocess.DUPLICATE_SAME_ACCESS).Detach()
import sys
if sys.platform == "win32":
import msvcrt
import _subprocess
else:
import fcntl
# Create pipe for communication
pipeout, pipein = os.pipe()
# Prepare to pass to child process
if sys.platform == "win32":
curproc = _subprocess.GetCurrentProcess()
pipeouth = msvcrt.get_osfhandle(pipeout)
pipeoutih = _subprocess.DuplicateHandle(curproc, pipeouth, curproc, 0, 1,
_subprocess.DUPLICATE_SAME_ACCESS)
pipearg = str(int(pipeoutih))
print pipearg
else:
pipearg = str(pipeout)
# Must close pipe input if child will block waiting for end
# Can also be closed in a preexec_fn passed to subprocess.Popen
fcntl.fcntl(pipein, fcntl.F_SETFD, fcntl.FD_CLOEXEC)
# Start child with argument indicating which FD/FH to read from
subproc = subprocess.Popen(['python', 'child.py', pipearg], close_fds=False)
# Close read end of pipe in parent
os.close(pipeout)
def _make_inheritable(self, handle):
return _subprocess.DuplicateHandle(_subprocess.GetCurrentProcess(), handle, _subprocess.GetCurrentProcess(), 0, 1, _subprocess.DUPLICATE_SAME_ACCESS)
