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  r80439 | brian.curtin | 2010-04-24 10:40:11 -0500 (Sat, 24 Apr 2010) | 6 lines

  Fix #7838. Add docstrings and privatize _subprocess implementation details.

  Since CREATE_NEW_* are used for the creation flags of a subprocess, they
  were added to __all__. The rest of the previously exposed attributes are
  now qualified by _subprocess.ATTR rather than importing *.
........
This commit is contained in:
Brian Curtin 2010-04-24 16:19:22 +00:00
parent e322024449
commit 1ce6b58153
2 changed files with 132 additions and 57 deletions
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86
Lib/subprocess.py
View file

@ -356,31 +356,18 @@ def __str__(self):
if mswindows:
from _subprocess import CREATE_NEW_CONSOLE, CREATE_NEW_PROCESS_GROUP
import threading
import msvcrt
if 0: # <-- change this to use pywin32 instead of the _subprocess driver
import pywintypes
from win32api import GetStdHandle, STD_INPUT_HANDLE, \
STD_OUTPUT_HANDLE, STD_ERROR_HANDLE
from win32api import GetCurrentProcess, DuplicateHandle, \
GetModuleFileName, GetVersion
from win32con import DUPLICATE_SAME_ACCESS, SW_HIDE
from win32pipe import CreatePipe
from win32process import CreateProcess, STARTUPINFO, \
GetExitCodeProcess, STARTF_USESTDHANDLES, \
STARTF_USESHOWWINDOW, CREATE_NEW_CONSOLE
from win32process import TerminateProcess
from win32event import WaitForSingleObject, INFINITE, WAIT_OBJECT_0
else:
from _subprocess import *
class STARTUPINFO:
dwFlags = 0
hStdInput = None
hStdOutput = None
hStdError = None
wShowWindow = 0
class pywintypes:
error = IOError
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')
@ -406,6 +393,8 @@ class pywintypes:
__all__ = ["Popen", "PIPE", "STDOUT", "call", "check_call", "getstatusoutput",
"getoutput", "check_output", "CalledProcessError"]
if mswindows:
__all__.extend(["CREATE_NEW_CONSOLE", "CREATE_NEW_PROCESS_GROUP"])
try:
MAXFD = os.sysconf("SC_OPEN_MAX")
except:
@ -770,11 +759,11 @@ def _get_handles(self, stdin, stdout, stderr):
errread, errwrite = -1, -1
if stdin is None:
p2cread = GetStdHandle(STD_INPUT_HANDLE)
p2cread = _subprocess.GetStdHandle(_subprocess.STD_INPUT_HANDLE)
if p2cread is None:
p2cread, _ = CreatePipe(None, 0)
p2cread, _ = _subprocess.CreatePipe(None, 0)
elif stdin == PIPE:
p2cread, p2cwrite = CreatePipe(None, 0)
p2cread, p2cwrite = _subprocess.CreatePipe(None, 0)
elif isinstance(stdin, int):
p2cread = msvcrt.get_osfhandle(stdin)
else:
@ -783,11 +772,11 @@ def _get_handles(self, stdin, stdout, stderr):
p2cread = self._make_inheritable(p2cread)
if stdout is None:
c2pwrite = GetStdHandle(STD_OUTPUT_HANDLE)
c2pwrite = _subprocess.GetStdHandle(_subprocess.STD_OUTPUT_HANDLE)
if c2pwrite is None:
_, c2pwrite = CreatePipe(None, 0)
_, c2pwrite = _subprocess.CreatePipe(None, 0)
elif stdout == PIPE:
c2pread, c2pwrite = CreatePipe(None, 0)
c2pread, c2pwrite = _subprocess.CreatePipe(None, 0)
elif isinstance(stdout, int):
c2pwrite = msvcrt.get_osfhandle(stdout)
else:
@ -796,11 +785,11 @@ def _get_handles(self, stdin, stdout, stderr):
c2pwrite = self._make_inheritable(c2pwrite)
if stderr is None:
errwrite = GetStdHandle(STD_ERROR_HANDLE)
errwrite = _subprocess.GetStdHandle(_subprocess.STD_ERROR_HANDLE)
if errwrite is None:
_, errwrite = CreatePipe(None, 0)
_, errwrite = _subprocess.CreatePipe(None, 0)
elif stderr == PIPE:
errread, errwrite = CreatePipe(None, 0)
errread, errwrite = _subprocess.CreatePipe(None, 0)
elif stderr == STDOUT:
errwrite = c2pwrite
elif isinstance(stderr, int):
@ -817,14 +806,15 @@ def _get_handles(self, stdin, stdout, stderr):
def _make_inheritable(self, handle):
"""Return a duplicate of handle, which is inheritable"""
return DuplicateHandle(GetCurrentProcess(), handle,
GetCurrentProcess(), 0, 1,
DUPLICATE_SAME_ACCESS)
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(GetModuleFileName(0)),
w9xpopen = os.path.join(
os.path.dirname(_subprocess.GetModuleFileName(0)),
"w9xpopen.exe")
if not os.path.exists(w9xpopen):
# Eeek - file-not-found - possibly an embedding
@ -854,17 +844,17 @@ def _execute_child(self, args, executable, preexec_fn, close_fds,
if startupinfo is None:
startupinfo = STARTUPINFO()
if None not in (p2cread, c2pwrite, errwrite):
startupinfo.dwFlags |= STARTF_USESTDHANDLES
startupinfo.dwFlags |= _subprocess.STARTF_USESTDHANDLES
startupinfo.hStdInput = p2cread
startupinfo.hStdOutput = c2pwrite
startupinfo.hStdError = errwrite
if shell:
startupinfo.dwFlags |= STARTF_USESHOWWINDOW
startupinfo.wShowWindow = SW_HIDE
startupinfo.dwFlags |= _subprocess.STARTF_USESHOWWINDOW
startupinfo.wShowWindow = _subprocess.SW_HIDE
comspec = os.environ.get("COMSPEC", "cmd.exe")
args = comspec + " /c " + args
if (GetVersion() >= 0x80000000 or
if (_subprocess.GetVersion() >= 0x80000000 or
os.path.basename(comspec).lower() == "command.com"):
# Win9x, or using command.com on NT. We need to
# use the w9xpopen intermediate program. For more
@ -878,11 +868,11 @@ def _execute_child(self, args, executable, preexec_fn, close_fds,
# use at xxx" and a hopeful warning about the
# stability of your system. Cost is Ctrl+C won't
# kill children.
creationflags |= CREATE_NEW_CONSOLE
creationflags |= _subprocess.CREATE_NEW_CONSOLE
# Start the process
try:
hp, ht, pid, tid = CreateProcess(executable, args,
hp, ht, pid, tid = _subprocess.CreateProcess(executable, args,
# no special security
None, None,
int(not close_fds),
@ -921,8 +911,9 @@ def _internal_poll(self, _deadstate=None):
"""Check if child process has terminated. Returns returncode
attribute."""
if self.returncode is None:
if WaitForSingleObject(self._handle, 0) == WAIT_OBJECT_0:
self.returncode = GetExitCodeProcess(self._handle)
if(_subprocess.WaitForSingleObject(self._handle, 0) ==
_subprocess.WAIT_OBJECT_0):
self.returncode = _subprocess.GetExitCodeProcess(self._handle)
return self.returncode
@ -930,8 +921,9 @@ def wait(self):
"""Wait for child process to terminate. Returns returncode
attribute."""
if self.returncode is None:
WaitForSingleObject(self._handle, INFINITE)
self.returncode = GetExitCodeProcess(self._handle)
_subprocess.WaitForSingleObject(self._handle,
_subprocess.INFINITE)
self.returncode = _subprocess.GetExitCodeProcess(self._handle)
return self.returncode
@ -990,7 +982,7 @@ def send_signal(self, sig):
def terminate(self):
"""Terminates the process
"""
TerminateProcess(self._handle, 1)
_subprocess.TerminateProcess(self._handle, 1)
kill = terminate

103
PC/_subprocess.c
View file

@ -158,6 +158,13 @@ static PyTypeObject sp_handle_type = {
/* -------------------------------------------------------------------- */
/* windows API functions */
PyDoc_STRVAR(GetStdHandle_doc,
"GetStdHandle(handle) -> integer\n\
\n\
Return a handle to the specified standard device\n\
(STD_INPUT_HANDLE, STD_OUTPUT_HANDLE, STD_ERROR_HANDLE).\n\
The integer associated with the handle object is returned.");
static PyObject *
sp_GetStdHandle(PyObject* self, PyObject* args)
{
@ -183,6 +190,11 @@ sp_GetStdHandle(PyObject* self, PyObject* args)
return HANDLE_TO_PYNUM(handle);
}
PyDoc_STRVAR(GetCurrentProcess_doc,
"GetCurrentProcess() -> handle\n\
\n\
Return a handle object for the current process.");
static PyObject *
sp_GetCurrentProcess(PyObject* self, PyObject* args)
{
@ -192,6 +204,17 @@ sp_GetCurrentProcess(PyObject* self, PyObject* args)
return sp_handle_new(GetCurrentProcess());
}
PyDoc_STRVAR(DuplicateHandle_doc,
"DuplicateHandle(source_proc_handle, source_handle,\n\
target_proc_handle, target_handle, access,\n\
inherit[, options]) -> handle\n\
\n\
Return a duplicate handle object.\n\
\n\
The duplicate handle refers to the same object as the original\n\
handle. Therefore, any changes to the object are reflected\n\
through both handles.");
static PyObject *
sp_DuplicateHandle(PyObject* self, PyObject* args)
{
@ -234,6 +257,14 @@ sp_DuplicateHandle(PyObject* self, PyObject* args)
return sp_handle_new(target_handle);
}
PyDoc_STRVAR(CreatePipe_doc,
"CreatePipe(pipe_attrs, size) -> (read_handle, write_handle)\n\
\n\
Create an anonymous pipe, and return handles to the read and\n\
write ends of the pipe.\n\
\n\
pipe_attrs is ignored internally and can be None.");
static PyObject *
sp_CreatePipe(PyObject* self, PyObject* args)
{
@ -369,6 +400,18 @@ getenvironment(PyObject* environment)
return NULL;
}
PyDoc_STRVAR(CreateProcess_doc,
"CreateProcess(app_name, cmd_line, proc_attrs, thread_attrs,\n\
inherit, flags, env_mapping, curdir,\n\
startup_info) -> (proc_handle, thread_handle,\n\
pid, tid)\n\
\n\
Create a new process and its primary thread. The return\n\
value is a tuple of the process handle, thread handle,\n\
process ID, and thread ID.\n\
\n\
proc_attrs and thread_attrs are ignored internally and can be None.");
static PyObject *
sp_CreateProcess(PyObject* self, PyObject* args)
{
@ -445,6 +488,11 @@ sp_CreateProcess(PyObject* self, PyObject* args)
pi.dwThreadId);
}
PyDoc_STRVAR(TerminateProcess_doc,
"TerminateProcess(handle, exit_code) -> None\n\
\n\
Terminate the specified process and all of its threads.");
static PyObject *
sp_TerminateProcess(PyObject* self, PyObject* args)
{
@ -465,6 +513,11 @@ sp_TerminateProcess(PyObject* self, PyObject* args)
return Py_None;
}
PyDoc_STRVAR(GetExitCodeProcess_doc,
"GetExitCodeProcess(handle) -> Exit code\n\
\n\
Return the termination status of the specified process.");
static PyObject *
sp_GetExitCodeProcess(PyObject* self, PyObject* args)
{
@ -483,6 +536,13 @@ sp_GetExitCodeProcess(PyObject* self, PyObject* args)
return PyLong_FromLong(exit_code);
}
PyDoc_STRVAR(WaitForSingleObject_doc,
"WaitForSingleObject(handle, timeout) -> result\n\
\n\
Wait until the specified object is in the signaled state or\n\
the time-out interval elapses. The timeout value is specified\n\
in milliseconds.");
static PyObject *
sp_WaitForSingleObject(PyObject* self, PyObject* args)
{
@ -505,6 +565,11 @@ sp_WaitForSingleObject(PyObject* self, PyObject* args)
return PyLong_FromLong((int) result);
}
PyDoc_STRVAR(GetVersion_doc,
"GetVersion() -> version\n\
\n\
Return the version number of the current operating system.");
static PyObject *
sp_GetVersion(PyObject* self, PyObject* args)
{
@ -514,6 +579,18 @@ sp_GetVersion(PyObject* self, PyObject* args)
return PyLong_FromLong((int) GetVersion());
}
PyDoc_STRVAR(GetModuleFileName_doc,
"GetModuleFileName(module) -> path\n\
\n\
Return the fully-qualified path for the file that contains\n\
the specified module. The module must have been loaded by the\n\
current process.\n\
\n\
The module parameter should be a handle to the loaded module\n\
whose path is being requested. If this parameter is 0, \n\
GetModuleFileName retrieves the path of the executable file\n\
of the current process.");
static PyObject *
sp_GetModuleFileName(PyObject* self, PyObject* args)
{
@ -535,16 +612,22 @@ sp_GetModuleFileName(PyObject* self, PyObject* args)
}
static PyMethodDef sp_functions[] = {
{"GetStdHandle", sp_GetStdHandle, METH_VARARGS},
{"GetCurrentProcess", sp_GetCurrentProcess, METH_VARARGS},
{"DuplicateHandle", sp_DuplicateHandle, METH_VARARGS},
{"CreatePipe", sp_CreatePipe, METH_VARARGS},
{"CreateProcess", sp_CreateProcess, METH_VARARGS},
{"TerminateProcess", sp_TerminateProcess, METH_VARARGS},
{"GetExitCodeProcess", sp_GetExitCodeProcess, METH_VARARGS},
{"WaitForSingleObject", sp_WaitForSingleObject, METH_VARARGS},
{"GetVersion", sp_GetVersion, METH_VARARGS},
{"GetModuleFileName", sp_GetModuleFileName, METH_VARARGS},
{"GetStdHandle", sp_GetStdHandle, METH_VARARGS, GetStdHandle_doc},
{"GetCurrentProcess", sp_GetCurrentProcess, METH_VARARGS,
GetCurrentProcess_doc},
{"DuplicateHandle", sp_DuplicateHandle, METH_VARARGS,
DuplicateHandle_doc},
{"CreatePipe", sp_CreatePipe, METH_VARARGS, CreatePipe_doc},
{"CreateProcess", sp_CreateProcess, METH_VARARGS, CreateProcess_doc},
{"TerminateProcess", sp_TerminateProcess, METH_VARARGS,
TerminateProcess_doc},
{"GetExitCodeProcess", sp_GetExitCodeProcess, METH_VARARGS,
GetExitCodeProcess_doc},
{"WaitForSingleObject", sp_WaitForSingleObject, METH_VARARGS,
WaitForSingleObject_doc},
{"GetVersion", sp_GetVersion, METH_VARARGS, GetVersion_doc},
{"GetModuleFileName", sp_GetModuleFileName, METH_VARARGS,
GetModuleFileName_doc},
{NULL, NULL}
};