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cpython/Modules/_winapi.c
Segev Finer b2a6083eb0 bpo-19764: Implemented support for subprocess.Popen(close_fds=True) on Windows (#1218) 
Even though Python marks any handles it opens as non-inheritable there
is still a race when using `subprocess.Popen` since creating a process
with redirected stdio requires temporarily creating inheritable handles.
By implementing support for `subprocess.Popen(close_fds=True)` we fix
this race.

In order to implement this we use PROC_THREAD_ATTRIBUTE_HANDLE_LIST
which is available since Windows Vista. Which allows to pass an explicit
list of handles to inherit when creating a process.

This commit also adds `STARTUPINFO.lpAttributeList["handle_list"]`
which can be used to control PROC_THREAD_ATTRIBUTE_HANDLE_LIST
directly.
2017-12-18 10:28:19 +01:00

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/*
* Support routines from the Windows API
*
* This module was originally created by merging PC/_subprocess.c with
* Modules/_multiprocessing/win32_functions.c.
*
* Copyright (c) 2004 by Fredrik Lundh <fredrik@pythonware.com>
* Copyright (c) 2004 by Secret Labs AB, http://www.pythonware.com
* Copyright (c) 2004 by Peter Astrand <astrand@lysator.liu.se>
*
* By obtaining, using, and/or copying this software and/or its
* associated documentation, you agree that you have read, understood,
* and will comply with the following terms and conditions:
*
* Permission to use, copy, modify, and distribute this software and
* its associated documentation for any purpose and without fee is
* hereby granted, provided that the above copyright notice appears in
* all copies, and that both that copyright notice and this permission
* notice appear in supporting documentation, and that the name of the
* authors not be used in advertising or publicity pertaining to
* distribution of the software without specific, written prior
* permission.
*
* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
* OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
/* Licensed to PSF under a Contributor Agreement. */
/* See http://www.python.org/2.4/license for licensing details. */
#include "Python.h"
#include "structmember.h"
#define WINDOWS_LEAN_AND_MEAN
#include "windows.h"
#include <crtdbg.h>
#include "winreparse.h"
#if defined(MS_WIN32) && !defined(MS_WIN64)
#define HANDLE_TO_PYNUM(handle) \
PyLong_FromUnsignedLong((unsigned long) handle)
#define PYNUM_TO_HANDLE(obj) ((HANDLE)PyLong_AsUnsignedLong(obj))
#define F_POINTER "k"
#define T_POINTER T_ULONG
#else
#define HANDLE_TO_PYNUM(handle) \
PyLong_FromUnsignedLongLong((unsigned long long) handle)
#define PYNUM_TO_HANDLE(obj) ((HANDLE)PyLong_AsUnsignedLongLong(obj))
#define F_POINTER "K"
#define T_POINTER T_ULONGLONG
#endif
#define F_HANDLE F_POINTER
#define F_DWORD "k"
#define T_HANDLE T_POINTER
/* Grab CancelIoEx dynamically from kernel32 */
static int has_CancelIoEx = -1;
static BOOL (CALLBACK *Py_CancelIoEx)(HANDLE, LPOVERLAPPED);
static int
check_CancelIoEx()
{
if (has_CancelIoEx == -1)
{
HINSTANCE hKernel32 = GetModuleHandle("KERNEL32");
* (FARPROC *) &Py_CancelIoEx = GetProcAddress(hKernel32,
"CancelIoEx");
has_CancelIoEx = (Py_CancelIoEx != NULL);
}
return has_CancelIoEx;
}
/*
* A Python object wrapping an OVERLAPPED structure and other useful data
* for overlapped I/O
*/
typedef struct {
PyObject_HEAD
OVERLAPPED overlapped;
/* For convenience, we store the file handle too */
HANDLE handle;
/* Whether there's I/O in flight */
int pending;
/* Whether I/O completed successfully */
int completed;
/* Buffer used for reading (optional) */
PyObject *read_buffer;
/* Buffer used for writing (optional) */
Py_buffer write_buffer;
} OverlappedObject;
static void
overlapped_dealloc(OverlappedObject *self)
{
DWORD bytes;
int err = GetLastError();
if (self->pending) {
if (check_CancelIoEx() &&
Py_CancelIoEx(self->handle, &self->overlapped) &&
GetOverlappedResult(self->handle, &self->overlapped, &bytes, TRUE))
{
/* The operation is no longer pending -- nothing to do. */
}
else if (_Py_IsFinalizing())
{
/* The operation is still pending -- give a warning. This
will probably only happen on Windows XP. */
PyErr_SetString(PyExc_RuntimeError,
"I/O operations still in flight while destroying "
"Overlapped object, the process may crash");
PyErr_WriteUnraisable(NULL);
}
else
{
/* The operation is still pending, but the process is
probably about to exit, so we need not worry too much
about memory leaks. Leaking self prevents a potential
crash. This can happen when a daemon thread is cleaned
up at exit -- see #19565. We only expect to get here
on Windows XP. */
CloseHandle(self->overlapped.hEvent);
SetLastError(err);
return;
}
}
CloseHandle(self->overlapped.hEvent);
SetLastError(err);
if (self->write_buffer.obj)
PyBuffer_Release(&self->write_buffer);
Py_CLEAR(self->read_buffer);
PyObject_Del(self);
}
/*[clinic input]
module _winapi
class _winapi.Overlapped "OverlappedObject *" "&OverlappedType"
[clinic start generated code]*/
/*[clinic end generated code: output=da39a3ee5e6b4b0d input=c13d3f5fd1dabb84]*/
/*[python input]
def create_converter(type_, format_unit):
name = type_ + '_converter'
# registered upon creation by CConverter's metaclass
type(name, (CConverter,), {'type': type_, 'format_unit': format_unit})
# format unit differs between platforms for these
create_converter('HANDLE', '" F_HANDLE "')
create_converter('HMODULE', '" F_HANDLE "')
create_converter('LPSECURITY_ATTRIBUTES', '" F_POINTER "')
create_converter('BOOL', 'i') # F_BOOL used previously (always 'i')
create_converter('DWORD', 'k') # F_DWORD is always "k" (which is much shorter)
create_converter('LPCTSTR', 's')
create_converter('LPWSTR', 'u')
create_converter('UINT', 'I') # F_UINT used previously (always 'I')
class HANDLE_return_converter(CReturnConverter):
type = 'HANDLE'
def render(self, function, data):
self.declare(data)
self.err_occurred_if("_return_value == INVALID_HANDLE_VALUE", data)
data.return_conversion.append(
'if (_return_value == NULL) {\n Py_RETURN_NONE;\n}\n')
data.return_conversion.append(
'return_value = HANDLE_TO_PYNUM(_return_value);\n')
class DWORD_return_converter(CReturnConverter):
type = 'DWORD'
def render(self, function, data):
self.declare(data)
self.err_occurred_if("_return_value == PY_DWORD_MAX", data)
data.return_conversion.append(
'return_value = Py_BuildValue("k", _return_value);\n')
[python start generated code]*/
/*[python end generated code: output=da39a3ee5e6b4b0d input=4527052fe06e5823]*/
#include "clinic/_winapi.c.h"
/*[clinic input]
_winapi.Overlapped.GetOverlappedResult
wait: bool
/
[clinic start generated code]*/
static PyObject *
_winapi_Overlapped_GetOverlappedResult_impl(OverlappedObject *self, int wait)
/*[clinic end generated code: output=bdd0c1ed6518cd03 input=194505ee8e0e3565]*/
{
BOOL res;
DWORD transferred = 0;
DWORD err;
Py_BEGIN_ALLOW_THREADS
res = GetOverlappedResult(self->handle, &self->overlapped, &transferred,
wait != 0);
Py_END_ALLOW_THREADS
err = res ? ERROR_SUCCESS : GetLastError();
switch (err) {
case ERROR_SUCCESS:
case ERROR_MORE_DATA:
case ERROR_OPERATION_ABORTED:
self->completed = 1;
self->pending = 0;
break;
case ERROR_IO_INCOMPLETE:
break;
default:
self->pending = 0;
return PyErr_SetExcFromWindowsErr(PyExc_OSError, err);
}
if (self->completed && self->read_buffer != NULL) {
assert(PyBytes_CheckExact(self->read_buffer));
if (transferred != PyBytes_GET_SIZE(self->read_buffer) &&
_PyBytes_Resize(&self->read_buffer, transferred))
return NULL;
}
return Py_BuildValue("II", (unsigned) transferred, (unsigned) err);
}
/*[clinic input]
_winapi.Overlapped.getbuffer
[clinic start generated code]*/
static PyObject *
_winapi_Overlapped_getbuffer_impl(OverlappedObject *self)
/*[clinic end generated code: output=95a3eceefae0f748 input=347fcfd56b4ceabd]*/
{
PyObject *res;
if (!self->completed) {
PyErr_SetString(PyExc_ValueError,
"can't get read buffer before GetOverlappedResult() "
"signals the operation completed");
return NULL;
}
res = self->read_buffer ? self->read_buffer : Py_None;
Py_INCREF(res);
return res;
}
/*[clinic input]
_winapi.Overlapped.cancel
[clinic start generated code]*/
static PyObject *
_winapi_Overlapped_cancel_impl(OverlappedObject *self)
/*[clinic end generated code: output=fcb9ab5df4ebdae5 input=cbf3da142290039f]*/
{
BOOL res = TRUE;
if (self->pending) {
Py_BEGIN_ALLOW_THREADS
if (check_CancelIoEx())
res = Py_CancelIoEx(self->handle, &self->overlapped);
else
res = CancelIo(self->handle);
Py_END_ALLOW_THREADS
}
/* CancelIoEx returns ERROR_NOT_FOUND if the I/O completed in-between */
if (!res && GetLastError() != ERROR_NOT_FOUND)
return PyErr_SetExcFromWindowsErr(PyExc_OSError, 0);
self->pending = 0;
Py_RETURN_NONE;
}
static PyMethodDef overlapped_methods[] = {
_WINAPI_OVERLAPPED_GETOVERLAPPEDRESULT_METHODDEF
_WINAPI_OVERLAPPED_GETBUFFER_METHODDEF
_WINAPI_OVERLAPPED_CANCEL_METHODDEF
{NULL}
};
static PyMemberDef overlapped_members[] = {
{"event", T_HANDLE,
offsetof(OverlappedObject, overlapped) + offsetof(OVERLAPPED, hEvent),
READONLY, "overlapped event handle"},
{NULL}
};
PyTypeObject OverlappedType = {
PyVarObject_HEAD_INIT(NULL, 0)
/* tp_name */ "_winapi.Overlapped",
/* tp_basicsize */ sizeof(OverlappedObject),
/* tp_itemsize */ 0,
/* tp_dealloc */ (destructor) overlapped_dealloc,
/* tp_print */ 0,
/* tp_getattr */ 0,
/* tp_setattr */ 0,
/* tp_reserved */ 0,
/* tp_repr */ 0,
/* tp_as_number */ 0,
/* tp_as_sequence */ 0,
/* tp_as_mapping */ 0,
/* tp_hash */ 0,
/* tp_call */ 0,
/* tp_str */ 0,
/* tp_getattro */ 0,
/* tp_setattro */ 0,
/* tp_as_buffer */ 0,
/* tp_flags */ Py_TPFLAGS_DEFAULT,
/* tp_doc */ "OVERLAPPED structure wrapper",
/* tp_traverse */ 0,
/* tp_clear */ 0,
/* tp_richcompare */ 0,
/* tp_weaklistoffset */ 0,
/* tp_iter */ 0,
/* tp_iternext */ 0,
/* tp_methods */ overlapped_methods,
/* tp_members */ overlapped_members,
/* tp_getset */ 0,
/* tp_base */ 0,
/* tp_dict */ 0,
/* tp_descr_get */ 0,
/* tp_descr_set */ 0,
/* tp_dictoffset */ 0,
/* tp_init */ 0,
/* tp_alloc */ 0,
/* tp_new */ 0,
};
static OverlappedObject *
new_overlapped(HANDLE handle)
{
OverlappedObject *self;
self = PyObject_New(OverlappedObject, &OverlappedType);
if (!self)
return NULL;
self->handle = handle;
self->read_buffer = NULL;
self->pending = 0;
self->completed = 0;
memset(&self->overlapped, 0, sizeof(OVERLAPPED));
memset(&self->write_buffer, 0, sizeof(Py_buffer));
/* Manual reset, initially non-signalled */
self->overlapped.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
return self;
}
/* -------------------------------------------------------------------- */
/* windows API functions */
/*[clinic input]
_winapi.CloseHandle
handle: HANDLE
/
Close handle.
[clinic start generated code]*/
static PyObject *
_winapi_CloseHandle_impl(PyObject *module, HANDLE handle)
/*[clinic end generated code: output=7ad37345f07bd782 input=7f0e4ac36e0352b8]*/
{
BOOL success;
Py_BEGIN_ALLOW_THREADS
success = CloseHandle(handle);
Py_END_ALLOW_THREADS
if (!success)
return PyErr_SetFromWindowsErr(0);
Py_RETURN_NONE;
}
/*[clinic input]
_winapi.ConnectNamedPipe
handle: HANDLE
overlapped as use_overlapped: bool(accept={int}) = False
[clinic start generated code]*/
static PyObject *
_winapi_ConnectNamedPipe_impl(PyObject *module, HANDLE handle,
int use_overlapped)
/*[clinic end generated code: output=335a0e7086800671 input=34f937c1c86e5e68]*/
{
BOOL success;
OverlappedObject *overlapped = NULL;
if (use_overlapped) {
overlapped = new_overlapped(handle);
if (!overlapped)
return NULL;
}
Py_BEGIN_ALLOW_THREADS
success = ConnectNamedPipe(handle,
overlapped ? &overlapped->overlapped : NULL);
Py_END_ALLOW_THREADS
if (overlapped) {
int err = GetLastError();
/* Overlapped ConnectNamedPipe never returns a success code */
assert(success == 0);
if (err == ERROR_IO_PENDING)
overlapped->pending = 1;
else if (err == ERROR_PIPE_CONNECTED)
SetEvent(overlapped->overlapped.hEvent);
else {
Py_DECREF(overlapped);
return PyErr_SetFromWindowsErr(err);
}
return (PyObject *) overlapped;
}
if (!success)
return PyErr_SetFromWindowsErr(0);
Py_RETURN_NONE;
}
/*[clinic input]
_winapi.CreateFile -> HANDLE
file_name: LPCTSTR
desired_access: DWORD
share_mode: DWORD
security_attributes: LPSECURITY_ATTRIBUTES
creation_disposition: DWORD
flags_and_attributes: DWORD
template_file: HANDLE
/
[clinic start generated code]*/
static HANDLE
_winapi_CreateFile_impl(PyObject *module, LPCTSTR file_name,
DWORD desired_access, DWORD share_mode,
LPSECURITY_ATTRIBUTES security_attributes,
DWORD creation_disposition,
DWORD flags_and_attributes, HANDLE template_file)
/*[clinic end generated code: output=417ddcebfc5a3d53 input=6423c3e40372dbd5]*/
{
HANDLE handle;
Py_BEGIN_ALLOW_THREADS
handle = CreateFile(file_name, desired_access,
share_mode, security_attributes,
creation_disposition,
flags_and_attributes, template_file);
Py_END_ALLOW_THREADS
if (handle == INVALID_HANDLE_VALUE)
PyErr_SetFromWindowsErr(0);
return handle;
}
/*[clinic input]
_winapi.CreateJunction
src_path: LPWSTR
dst_path: LPWSTR
/
[clinic start generated code]*/
static PyObject *
_winapi_CreateJunction_impl(PyObject *module, LPWSTR src_path,
LPWSTR dst_path)
/*[clinic end generated code: output=66b7eb746e1dfa25 input=8cd1f9964b6e3d36]*/
{
/* Privilege adjustment */
HANDLE token = NULL;
TOKEN_PRIVILEGES tp;
/* Reparse data buffer */
const USHORT prefix_len = 4;
USHORT print_len = 0;
USHORT rdb_size = 0;
_Py_PREPARSE_DATA_BUFFER rdb = NULL;
/* Junction point creation */
HANDLE junction = NULL;
DWORD ret = 0;
if (src_path == NULL || dst_path == NULL)
return PyErr_SetFromWindowsErr(ERROR_INVALID_PARAMETER);
if (wcsncmp(src_path, L"\\??\\", prefix_len) == 0)
return PyErr_SetFromWindowsErr(ERROR_INVALID_PARAMETER);
/* Adjust privileges to allow rewriting directory entry as a
junction point. */
if (!OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES, &token))
goto cleanup;
if (!LookupPrivilegeValue(NULL, SE_RESTORE_NAME, &tp.Privileges[0].Luid))
goto cleanup;
tp.PrivilegeCount = 1;
tp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
if (!AdjustTokenPrivileges(token, FALSE, &tp, sizeof(TOKEN_PRIVILEGES),
NULL, NULL))
goto cleanup;
if (GetFileAttributesW(src_path) == INVALID_FILE_ATTRIBUTES)
goto cleanup;
/* Store the absolute link target path length in print_len. */
print_len = (USHORT)GetFullPathNameW(src_path, 0, NULL, NULL);
if (print_len == 0)
goto cleanup;
/* NUL terminator should not be part of print_len. */
--print_len;
/* REPARSE_DATA_BUFFER usage is heavily under-documented, especially for
junction points. Here's what I've learned along the way:
- A junction point has two components: a print name and a substitute
name. They both describe the link target, but the substitute name is
the physical target and the print name is shown in directory listings.
- The print name must be a native name, prefixed with "\??\".
- Both names are stored after each other in the same buffer (the
PathBuffer) and both must be NUL-terminated.
- There are four members defining their respective offset and length
inside PathBuffer: SubstituteNameOffset, SubstituteNameLength,
PrintNameOffset and PrintNameLength.
- The total size we need to allocate for the REPARSE_DATA_BUFFER, thus,
is the sum of:
- the fixed header size (REPARSE_DATA_BUFFER_HEADER_SIZE)
- the size of the MountPointReparseBuffer member without the PathBuffer
- the size of the prefix ("\??\") in bytes
- the size of the print name in bytes
- the size of the substitute name in bytes
- the size of two NUL terminators in bytes */
rdb_size = _Py_REPARSE_DATA_BUFFER_HEADER_SIZE +
sizeof(rdb->MountPointReparseBuffer) -
sizeof(rdb->MountPointReparseBuffer.PathBuffer) +
/* Two +1's for NUL terminators. */
(prefix_len + print_len + 1 + print_len + 1) * sizeof(WCHAR);
rdb = (_Py_PREPARSE_DATA_BUFFER)PyMem_RawMalloc(rdb_size);
if (rdb == NULL)
goto cleanup;
memset(rdb, 0, rdb_size);
rdb->ReparseTag = IO_REPARSE_TAG_MOUNT_POINT;
rdb->ReparseDataLength = rdb_size - _Py_REPARSE_DATA_BUFFER_HEADER_SIZE;
rdb->MountPointReparseBuffer.SubstituteNameOffset = 0;
rdb->MountPointReparseBuffer.SubstituteNameLength =
(prefix_len + print_len) * sizeof(WCHAR);
rdb->MountPointReparseBuffer.PrintNameOffset =
rdb->MountPointReparseBuffer.SubstituteNameLength + sizeof(WCHAR);
rdb->MountPointReparseBuffer.PrintNameLength = print_len * sizeof(WCHAR);
/* Store the full native path of link target at the substitute name
offset (0). */
wcscpy(rdb->MountPointReparseBuffer.PathBuffer, L"\\??\\");
if (GetFullPathNameW(src_path, print_len + 1,
rdb->MountPointReparseBuffer.PathBuffer + prefix_len,
NULL) == 0)
goto cleanup;
/* Copy everything but the native prefix to the print name offset. */
wcscpy(rdb->MountPointReparseBuffer.PathBuffer +
prefix_len + print_len + 1,
rdb->MountPointReparseBuffer.PathBuffer + prefix_len);
/* Create a directory for the junction point. */
if (!CreateDirectoryW(dst_path, NULL))
goto cleanup;
junction = CreateFileW(dst_path, GENERIC_READ | GENERIC_WRITE, 0, NULL,
OPEN_EXISTING,
FILE_FLAG_OPEN_REPARSE_POINT | FILE_FLAG_BACKUP_SEMANTICS, NULL);
if (junction == INVALID_HANDLE_VALUE)
goto cleanup;
/* Make the directory entry a junction point. */
if (!DeviceIoControl(junction, FSCTL_SET_REPARSE_POINT, rdb, rdb_size,
NULL, 0, &ret, NULL))
goto cleanup;
cleanup:
ret = GetLastError();
CloseHandle(token);
CloseHandle(junction);
PyMem_RawFree(rdb);
if (ret != 0)
return PyErr_SetFromWindowsErr(ret);
Py_RETURN_NONE;
}
/*[clinic input]
_winapi.CreateNamedPipe -> HANDLE
name: LPCTSTR
open_mode: DWORD
pipe_mode: DWORD
max_instances: DWORD
out_buffer_size: DWORD
in_buffer_size: DWORD
default_timeout: DWORD
security_attributes: LPSECURITY_ATTRIBUTES
/
[clinic start generated code]*/
static HANDLE
_winapi_CreateNamedPipe_impl(PyObject *module, LPCTSTR name, DWORD open_mode,
DWORD pipe_mode, DWORD max_instances,
DWORD out_buffer_size, DWORD in_buffer_size,
DWORD default_timeout,
LPSECURITY_ATTRIBUTES security_attributes)
/*[clinic end generated code: output=80f8c07346a94fbc input=5a73530b84d8bc37]*/
{
HANDLE handle;
Py_BEGIN_ALLOW_THREADS
handle = CreateNamedPipe(name, open_mode, pipe_mode,
max_instances, out_buffer_size,
in_buffer_size, default_timeout,
security_attributes);
Py_END_ALLOW_THREADS
if (handle == INVALID_HANDLE_VALUE)
PyErr_SetFromWindowsErr(0);
return handle;
}
/*[clinic input]
_winapi.CreatePipe
pipe_attrs: object
Ignored internally, can be None.
size: DWORD
/
Create an anonymous pipe.
Returns a 2-tuple of handles, to the read and write ends of the pipe.
[clinic start generated code]*/
static PyObject *
_winapi_CreatePipe_impl(PyObject *module, PyObject *pipe_attrs, DWORD size)
/*[clinic end generated code: output=1c4411d8699f0925 input=c4f2cfa56ef68d90]*/
{
HANDLE read_pipe;
HANDLE write_pipe;
BOOL result;
Py_BEGIN_ALLOW_THREADS
result = CreatePipe(&read_pipe, &write_pipe, NULL, size);
Py_END_ALLOW_THREADS
if (! result)
return PyErr_SetFromWindowsErr(GetLastError());
return Py_BuildValue(
"NN", HANDLE_TO_PYNUM(read_pipe), HANDLE_TO_PYNUM(write_pipe));
}
/* helpers for createprocess */
static unsigned long
getulong(PyObject* obj, const char* name)
{
PyObject* value;
unsigned long ret;
value = PyObject_GetAttrString(obj, name);
if (! value) {
PyErr_Clear(); /* FIXME: propagate error? */
return 0;
}
ret = PyLong_AsUnsignedLong(value);
Py_DECREF(value);
return ret;
}
static HANDLE
gethandle(PyObject* obj, const char* name)
{
PyObject* value;
HANDLE ret;
value = PyObject_GetAttrString(obj, name);
if (! value) {
PyErr_Clear(); /* FIXME: propagate error? */
return NULL;
}
if (value == Py_None)
ret = NULL;
else
ret = PYNUM_TO_HANDLE(value);
Py_DECREF(value);
return ret;
}
static PyObject*
getenvironment(PyObject* environment)
{
Py_ssize_t i, envsize, totalsize;
Py_UCS4 *buffer = NULL, *p, *end;
PyObject *keys, *values, *res;
/* convert environment dictionary to windows environment string */
if (! PyMapping_Check(environment)) {
PyErr_SetString(
PyExc_TypeError, "environment must be dictionary or None");
return NULL;
}
keys = PyMapping_Keys(environment);
if (!keys) {
return NULL;
}
values = PyMapping_Values(environment);
if (!values) {
goto error;
}
envsize = PySequence_Fast_GET_SIZE(keys);
if (PySequence_Fast_GET_SIZE(values) != envsize) {
PyErr_SetString(PyExc_RuntimeError,
"environment changed size during iteration");
goto error;
}
totalsize = 1; /* trailing null character */
for (i = 0; i < envsize; i++) {
PyObject* key = PySequence_Fast_GET_ITEM(keys, i);
PyObject* value = PySequence_Fast_GET_ITEM(values, i);
if (! PyUnicode_Check(key) || ! PyUnicode_Check(value)) {
PyErr_SetString(PyExc_TypeError,
"environment can only contain strings");
goto error;
}
if (PyUnicode_FindChar(key, '\0', 0, PyUnicode_GET_LENGTH(key), 1) != -1 ||
PyUnicode_FindChar(value, '\0', 0, PyUnicode_GET_LENGTH(value), 1) != -1)
{
PyErr_SetString(PyExc_ValueError, "embedded null character");
goto error;
}
/* Search from index 1 because on Windows starting '=' is allowed for
defining hidden environment variables. */
if (PyUnicode_GET_LENGTH(key) == 0 ||
PyUnicode_FindChar(key, '=', 1, PyUnicode_GET_LENGTH(key), 1) != -1)
{
PyErr_SetString(PyExc_ValueError, "illegal environment variable name");
goto error;
}
if (totalsize > PY_SSIZE_T_MAX - PyUnicode_GET_LENGTH(key) - 1) {
PyErr_SetString(PyExc_OverflowError, "environment too long");
goto error;
}
totalsize += PyUnicode_GET_LENGTH(key) + 1; /* +1 for '=' */
if (totalsize > PY_SSIZE_T_MAX - PyUnicode_GET_LENGTH(value) - 1) {
PyErr_SetString(PyExc_OverflowError, "environment too long");
goto error;
}
totalsize += PyUnicode_GET_LENGTH(value) + 1; /* +1 for '\0' */
}
buffer = PyMem_NEW(Py_UCS4, totalsize);
if (! buffer) {
PyErr_NoMemory();
goto error;
}
p = buffer;
end = buffer + totalsize;
for (i = 0; i < envsize; i++) {
PyObject* key = PySequence_Fast_GET_ITEM(keys, i);
PyObject* value = PySequence_Fast_GET_ITEM(values, i);
if (!PyUnicode_AsUCS4(key, p, end - p, 0))
goto error;
p += PyUnicode_GET_LENGTH(key);
*p++ = '=';
if (!PyUnicode_AsUCS4(value, p, end - p, 0))
goto error;
p += PyUnicode_GET_LENGTH(value);
*p++ = '\0';
}
/* add trailing null byte */
*p++ = '\0';
assert(p == end);
Py_XDECREF(keys);
Py_XDECREF(values);
res = PyUnicode_FromKindAndData(PyUnicode_4BYTE_KIND, buffer, p - buffer);
PyMem_Free(buffer);
return res;
error:
PyMem_Free(buffer);
Py_XDECREF(keys);
Py_XDECREF(values);
return NULL;
}
static LPHANDLE
gethandlelist(PyObject *mapping, const char *name, Py_ssize_t *size)
{
LPHANDLE ret = NULL;
PyObject *value_fast = NULL;
PyObject *value;
Py_ssize_t i;
value = PyMapping_GetItemString(mapping, name);
if (!value) {
PyErr_Clear();
return NULL;
}
if (value == Py_None) {
goto cleanup;
}
value_fast = PySequence_Fast(value, "handle_list must be a sequence or None");
if (value_fast == NULL)
goto cleanup;
*size = PySequence_Fast_GET_SIZE(value_fast) * sizeof(HANDLE);
/* Passing an empty array causes CreateProcess to fail so just don't set it */
if (*size == 0) {
goto cleanup;
}
ret = PyMem_Malloc(*size);
if (ret == NULL)
goto cleanup;
for (i = 0; i < PySequence_Fast_GET_SIZE(value_fast); i++) {
ret[i] = PYNUM_TO_HANDLE(PySequence_Fast_GET_ITEM(value_fast, i));
if (ret[i] == (HANDLE)-1 && PyErr_Occurred()) {
PyMem_Free(ret);
ret = NULL;
goto cleanup;
}
}
cleanup:
Py_DECREF(value);
Py_XDECREF(value_fast);
return ret;
}
typedef struct {
LPPROC_THREAD_ATTRIBUTE_LIST attribute_list;
LPHANDLE handle_list;
} AttributeList;
static void
freeattributelist(AttributeList *attribute_list)
{
if (attribute_list->attribute_list != NULL) {
DeleteProcThreadAttributeList(attribute_list->attribute_list);
PyMem_Free(attribute_list->attribute_list);
}
PyMem_Free(attribute_list->handle_list);
memset(attribute_list, 0, sizeof(*attribute_list));
}
static int
getattributelist(PyObject *obj, const char *name, AttributeList *attribute_list)
{
int ret = 0;
DWORD err;
BOOL result;
PyObject *value;
Py_ssize_t handle_list_size;
DWORD attribute_count = 0;
SIZE_T attribute_list_size = 0;
value = PyObject_GetAttrString(obj, name);
if (!value) {
PyErr_Clear(); /* FIXME: propagate error? */
return 0;
}
if (value == Py_None) {
ret = 0;
goto cleanup;
}
if (!PyMapping_Check(value)) {
ret = -1;
PyErr_Format(PyExc_TypeError, "%s must be a mapping or None", name);
goto cleanup;
}
attribute_list->handle_list = gethandlelist(value, "handle_list", &handle_list_size);
if (attribute_list->handle_list == NULL && PyErr_Occurred()) {
ret = -1;
goto cleanup;
}
if (attribute_list->handle_list != NULL)
++attribute_count;
/* Get how many bytes we need for the attribute list */
result = InitializeProcThreadAttributeList(NULL, attribute_count, 0, &attribute_list_size);
if (result || GetLastError() != ERROR_INSUFFICIENT_BUFFER) {
ret = -1;
PyErr_SetFromWindowsErr(GetLastError());
goto cleanup;
}
attribute_list->attribute_list = PyMem_Malloc(attribute_list_size);
if (attribute_list->attribute_list == NULL) {
ret = -1;
goto cleanup;
}
result = InitializeProcThreadAttributeList(
attribute_list->attribute_list,
attribute_count,
0,
&attribute_list_size);
if (!result) {
err = GetLastError();
/* So that we won't call DeleteProcThreadAttributeList */
PyMem_Free(attribute_list->attribute_list);
attribute_list->attribute_list = NULL;
ret = -1;
PyErr_SetFromWindowsErr(err);
goto cleanup;
}
if (attribute_list->handle_list != NULL) {
result = UpdateProcThreadAttribute(
attribute_list->attribute_list,
0,
PROC_THREAD_ATTRIBUTE_HANDLE_LIST,
attribute_list->handle_list,
handle_list_size,
NULL,
NULL);
if (!result) {
ret = -1;
PyErr_SetFromWindowsErr(GetLastError());
goto cleanup;
}
}
cleanup:
Py_DECREF(value);
if (ret < 0)
freeattributelist(attribute_list);
return ret;
}
/*[clinic input]
_winapi.CreateProcess
application_name: Py_UNICODE(accept={str, NoneType})
command_line: Py_UNICODE(accept={str, NoneType})
proc_attrs: object
Ignored internally, can be None.
thread_attrs: object
Ignored internally, can be None.
inherit_handles: BOOL
creation_flags: DWORD
env_mapping: object
current_directory: Py_UNICODE(accept={str, NoneType})
startup_info: object
/
Create a new process and its primary thread.
The return value is a tuple of the process handle, thread handle,
process ID, and thread ID.
[clinic start generated code]*/
static PyObject *
_winapi_CreateProcess_impl(PyObject *module, Py_UNICODE *application_name,
Py_UNICODE *command_line, PyObject *proc_attrs,
PyObject *thread_attrs, BOOL inherit_handles,
DWORD creation_flags, PyObject *env_mapping,
Py_UNICODE *current_directory,
PyObject *startup_info)
/*[clinic end generated code: output=4652a33aff4b0ae1 input=4a43b05038d639bb]*/
{
PyObject *ret = NULL;
BOOL result;
PROCESS_INFORMATION pi;
STARTUPINFOEXW si;
PyObject *environment = NULL;
wchar_t *wenvironment;
AttributeList attribute_list = {0};
ZeroMemory(&si, sizeof(si));
si.StartupInfo.cb = sizeof(si);
/* note: we only support a small subset of all SI attributes */
si.StartupInfo.dwFlags = getulong(startup_info, "dwFlags");
si.StartupInfo.wShowWindow = (WORD)getulong(startup_info, "wShowWindow");
si.StartupInfo.hStdInput = gethandle(startup_info, "hStdInput");
si.StartupInfo.hStdOutput = gethandle(startup_info, "hStdOutput");
si.StartupInfo.hStdError = gethandle(startup_info, "hStdError");
if (PyErr_Occurred())
goto cleanup;
if (env_mapping != Py_None) {
environment = getenvironment(env_mapping);
if (environment == NULL) {
goto cleanup;
}
/* contains embedded null characters */
wenvironment = PyUnicode_AsUnicode(environment);
if (wenvironment == NULL) {
goto cleanup;
}
}
else {
environment = NULL;
wenvironment = NULL;
}
if (getattributelist(startup_info, "lpAttributeList", &attribute_list) < 0)
goto cleanup;
si.lpAttributeList = attribute_list.attribute_list;
Py_BEGIN_ALLOW_THREADS
result = CreateProcessW(application_name,
command_line,
NULL,
NULL,
inherit_handles,
creation_flags | EXTENDED_STARTUPINFO_PRESENT |
CREATE_UNICODE_ENVIRONMENT,
wenvironment,
current_directory,
(LPSTARTUPINFOW)&si,
&pi);
Py_END_ALLOW_THREADS
if (!result) {
PyErr_SetFromWindowsErr(GetLastError());
goto cleanup;
}
ret = Py_BuildValue("NNkk",
HANDLE_TO_PYNUM(pi.hProcess),
HANDLE_TO_PYNUM(pi.hThread),
pi.dwProcessId,
pi.dwThreadId);
cleanup:
Py_XDECREF(environment);
freeattributelist(&attribute_list);
return ret;
}
/*[clinic input]
_winapi.DuplicateHandle -> HANDLE
source_process_handle: HANDLE
source_handle: HANDLE
target_process_handle: HANDLE
desired_access: DWORD
inherit_handle: BOOL
options: DWORD = 0
/
Return a duplicate handle object.
The duplicate handle refers to the same object as the original
handle. Therefore, any changes to the object are reflected
through both handles.
[clinic start generated code]*/
static HANDLE
_winapi_DuplicateHandle_impl(PyObject *module, HANDLE source_process_handle,
HANDLE source_handle,
HANDLE target_process_handle,
DWORD desired_access, BOOL inherit_handle,
DWORD options)
/*[clinic end generated code: output=ad9711397b5dcd4e input=b933e3f2356a8c12]*/
{
HANDLE target_handle;
BOOL result;
Py_BEGIN_ALLOW_THREADS
result = DuplicateHandle(
source_process_handle,
source_handle,
target_process_handle,
&target_handle,
desired_access,
inherit_handle,
options
);
Py_END_ALLOW_THREADS
if (! result) {
PyErr_SetFromWindowsErr(GetLastError());
return INVALID_HANDLE_VALUE;
}
return target_handle;
}
/*[clinic input]
_winapi.ExitProcess
ExitCode: UINT
/
[clinic start generated code]*/
static PyObject *
_winapi_ExitProcess_impl(PyObject *module, UINT ExitCode)
/*[clinic end generated code: output=a387deb651175301 input=4f05466a9406c558]*/
{
#if defined(Py_DEBUG)
SetErrorMode(SEM_FAILCRITICALERRORS|SEM_NOALIGNMENTFAULTEXCEPT|
SEM_NOGPFAULTERRORBOX|SEM_NOOPENFILEERRORBOX);
_CrtSetReportMode(_CRT_ASSERT, _CRTDBG_MODE_DEBUG);
#endif
ExitProcess(ExitCode);
return NULL;
}
/*[clinic input]
_winapi.GetCurrentProcess -> HANDLE
Return a handle object for the current process.
[clinic start generated code]*/
static HANDLE
_winapi_GetCurrentProcess_impl(PyObject *module)
/*[clinic end generated code: output=ddeb4dd2ffadf344 input=b213403fd4b96b41]*/
{
return GetCurrentProcess();
}
/*[clinic input]
_winapi.GetExitCodeProcess -> DWORD
process: HANDLE
/
Return the termination status of the specified process.
[clinic start generated code]*/
static DWORD
_winapi_GetExitCodeProcess_impl(PyObject *module, HANDLE process)
/*[clinic end generated code: output=b4620bdf2bccf36b input=61b6bfc7dc2ee374]*/
{
DWORD exit_code;
BOOL result;
result = GetExitCodeProcess(process, &exit_code);
if (! result) {
PyErr_SetFromWindowsErr(GetLastError());
exit_code = PY_DWORD_MAX;
}
return exit_code;
}
/*[clinic input]
_winapi.GetLastError -> DWORD
[clinic start generated code]*/
static DWORD
_winapi_GetLastError_impl(PyObject *module)
/*[clinic end generated code: output=8585b827cb1a92c5 input=62d47fb9bce038ba]*/
{
return GetLastError();
}
/*[clinic input]
_winapi.GetModuleFileName
module_handle: HMODULE
/
Return the fully-qualified path for the file that contains module.
The module must have been loaded by the current process.
The module parameter should be a handle to the loaded module
whose path is being requested. If this parameter is 0,
GetModuleFileName retrieves the path of the executable file
of the current process.
[clinic start generated code]*/
static PyObject *
_winapi_GetModuleFileName_impl(PyObject *module, HMODULE module_handle)
/*[clinic end generated code: output=85b4b728c5160306 input=6d66ff7deca5d11f]*/
{
BOOL result;
WCHAR filename[MAX_PATH];
result = GetModuleFileNameW(module_handle, filename, MAX_PATH);
filename[MAX_PATH-1] = '\0';
if (! result)
return PyErr_SetFromWindowsErr(GetLastError());
return PyUnicode_FromWideChar(filename, wcslen(filename));
}
/*[clinic input]
_winapi.GetStdHandle -> HANDLE
std_handle: DWORD
One of STD_INPUT_HANDLE, STD_OUTPUT_HANDLE, or STD_ERROR_HANDLE.
/
Return a handle to the specified standard device.
The integer associated with the handle object is returned.
[clinic start generated code]*/
static HANDLE
_winapi_GetStdHandle_impl(PyObject *module, DWORD std_handle)
/*[clinic end generated code: output=0e613001e73ab614 input=07016b06a2fc8826]*/
{
HANDLE handle;
Py_BEGIN_ALLOW_THREADS
handle = GetStdHandle(std_handle);
Py_END_ALLOW_THREADS
if (handle == INVALID_HANDLE_VALUE)
PyErr_SetFromWindowsErr(GetLastError());
return handle;
}
/*[clinic input]
_winapi.GetVersion -> long
Return the version number of the current operating system.
[clinic start generated code]*/
static long
_winapi_GetVersion_impl(PyObject *module)
/*[clinic end generated code: output=e41f0db5a3b82682 input=e21dff8d0baeded2]*/
/* Disable deprecation warnings about GetVersionEx as the result is
being passed straight through to the caller, who is responsible for
using it correctly. */
#pragma warning(push)
#pragma warning(disable:4996)
{
return GetVersion();
}
#pragma warning(pop)
/*[clinic input]
_winapi.OpenProcess -> HANDLE
desired_access: DWORD
inherit_handle: BOOL
process_id: DWORD
/
[clinic start generated code]*/
static HANDLE
_winapi_OpenProcess_impl(PyObject *module, DWORD desired_access,
BOOL inherit_handle, DWORD process_id)
/*[clinic end generated code: output=b42b6b81ea5a0fc3 input=ec98c4cf4ea2ec36]*/
{
HANDLE handle;
handle = OpenProcess(desired_access, inherit_handle, process_id);
if (handle == NULL) {
PyErr_SetFromWindowsErr(0);
handle = INVALID_HANDLE_VALUE;
}
return handle;
}
/*[clinic input]
_winapi.PeekNamedPipe
handle: HANDLE
size: int = 0
/
[clinic start generated code]*/
static PyObject *
_winapi_PeekNamedPipe_impl(PyObject *module, HANDLE handle, int size)
/*[clinic end generated code: output=d0c3e29e49d323dd input=c7aa53bfbce69d70]*/
{
PyObject *buf = NULL;
DWORD nread, navail, nleft;
BOOL ret;
if (size < 0) {
PyErr_SetString(PyExc_ValueError, "negative size");
return NULL;
}
if (size) {
buf = PyBytes_FromStringAndSize(NULL, size);
if (!buf)
return NULL;
Py_BEGIN_ALLOW_THREADS
ret = PeekNamedPipe(handle, PyBytes_AS_STRING(buf), size, &nread,
&navail, &nleft);
Py_END_ALLOW_THREADS
if (!ret) {
Py_DECREF(buf);
return PyErr_SetExcFromWindowsErr(PyExc_OSError, 0);
}
if (_PyBytes_Resize(&buf, nread))
return NULL;
return Py_BuildValue("Nii", buf, navail, nleft);
}
else {
Py_BEGIN_ALLOW_THREADS
ret = PeekNamedPipe(handle, NULL, 0, NULL, &navail, &nleft);
Py_END_ALLOW_THREADS
if (!ret) {
return PyErr_SetExcFromWindowsErr(PyExc_OSError, 0);
}
return Py_BuildValue("ii", navail, nleft);
}
}
/*[clinic input]
_winapi.ReadFile
handle: HANDLE
size: int
overlapped as use_overlapped: bool(accept={int}) = False
[clinic start generated code]*/
static PyObject *
_winapi_ReadFile_impl(PyObject *module, HANDLE handle, int size,
int use_overlapped)
/*[clinic end generated code: output=492029ca98161d84 input=3f0fde92f74de59a]*/
{
DWORD nread;
PyObject *buf;
BOOL ret;
DWORD err;
OverlappedObject *overlapped = NULL;
buf = PyBytes_FromStringAndSize(NULL, size);
if (!buf)
return NULL;
if (use_overlapped) {
overlapped = new_overlapped(handle);
if (!overlapped) {
Py_DECREF(buf);
return NULL;
}
/* Steals reference to buf */
overlapped->read_buffer = buf;
}
Py_BEGIN_ALLOW_THREADS
ret = ReadFile(handle, PyBytes_AS_STRING(buf), size, &nread,
overlapped ? &overlapped->overlapped : NULL);
Py_END_ALLOW_THREADS
err = ret ? 0 : GetLastError();
if (overlapped) {
if (!ret) {
if (err == ERROR_IO_PENDING)
overlapped->pending = 1;
else if (err != ERROR_MORE_DATA) {
Py_DECREF(overlapped);
return PyErr_SetExcFromWindowsErr(PyExc_OSError, 0);
}
}
return Py_BuildValue("NI", (PyObject *) overlapped, err);
}
if (!ret && err != ERROR_MORE_DATA) {
Py_DECREF(buf);
return PyErr_SetExcFromWindowsErr(PyExc_OSError, 0);
}
if (_PyBytes_Resize(&buf, nread))
return NULL;
return Py_BuildValue("NI", buf, err);
}
/*[clinic input]
_winapi.SetNamedPipeHandleState
named_pipe: HANDLE
mode: object
max_collection_count: object
collect_data_timeout: object
/
[clinic start generated code]*/
static PyObject *
_winapi_SetNamedPipeHandleState_impl(PyObject *module, HANDLE named_pipe,
PyObject *mode,
PyObject *max_collection_count,
PyObject *collect_data_timeout)
/*[clinic end generated code: output=f2129d222cbfa095 input=9142d72163d0faa6]*/
{
PyObject *oArgs[3] = {mode, max_collection_count, collect_data_timeout};
DWORD dwArgs[3], *pArgs[3] = {NULL, NULL, NULL};
int i;
PyErr_Clear();
for (i = 0 ; i < 3 ; i++) {
if (oArgs[i] != Py_None) {
dwArgs[i] = PyLong_AsUnsignedLongMask(oArgs[i]);
if (PyErr_Occurred())
return NULL;
pArgs[i] = &dwArgs[i];
}
}
if (!SetNamedPipeHandleState(named_pipe, pArgs[0], pArgs[1], pArgs[2]))
return PyErr_SetFromWindowsErr(0);
Py_RETURN_NONE;
}
/*[clinic input]
_winapi.TerminateProcess
handle: HANDLE
exit_code: UINT
/
Terminate the specified process and all of its threads.
[clinic start generated code]*/
static PyObject *
_winapi_TerminateProcess_impl(PyObject *module, HANDLE handle,
UINT exit_code)
/*[clinic end generated code: output=f4e99ac3f0b1f34a input=d6bc0aa1ee3bb4df]*/
{
BOOL result;
result = TerminateProcess(handle, exit_code);
if (! result)
return PyErr_SetFromWindowsErr(GetLastError());
Py_RETURN_NONE;
}
/*[clinic input]
_winapi.WaitNamedPipe
name: LPCTSTR
timeout: DWORD
/
[clinic start generated code]*/
static PyObject *
_winapi_WaitNamedPipe_impl(PyObject *module, LPCTSTR name, DWORD timeout)
/*[clinic end generated code: output=c2866f4439b1fe38 input=36fc781291b1862c]*/
{
BOOL success;
Py_BEGIN_ALLOW_THREADS
success = WaitNamedPipe(name, timeout);
Py_END_ALLOW_THREADS
if (!success)
return PyErr_SetFromWindowsErr(0);
Py_RETURN_NONE;
}
/*[clinic input]
_winapi.WaitForMultipleObjects
handle_seq: object
wait_flag: BOOL
milliseconds: DWORD(c_default='INFINITE') = _winapi.INFINITE
/
[clinic start generated code]*/
static PyObject *
_winapi_WaitForMultipleObjects_impl(PyObject *module, PyObject *handle_seq,
BOOL wait_flag, DWORD milliseconds)
/*[clinic end generated code: output=295e3f00b8e45899 input=36f76ca057cd28a0]*/
{
DWORD result;
HANDLE handles[MAXIMUM_WAIT_OBJECTS];
HANDLE sigint_event = NULL;
Py_ssize_t nhandles, i;
if (!PySequence_Check(handle_seq)) {
PyErr_Format(PyExc_TypeError,
"sequence type expected, got '%s'",
Py_TYPE(handle_seq)->tp_name);
return NULL;
}
nhandles = PySequence_Length(handle_seq);
if (nhandles == -1)
return NULL;
if (nhandles < 0 || nhandles >= MAXIMUM_WAIT_OBJECTS - 1) {
PyErr_Format(PyExc_ValueError,
"need at most %zd handles, got a sequence of length %zd",
MAXIMUM_WAIT_OBJECTS - 1, nhandles);
return NULL;
}
for (i = 0; i < nhandles; i++) {
HANDLE h;
PyObject *v = PySequence_GetItem(handle_seq, i);
if (v == NULL)
return NULL;
if (!PyArg_Parse(v, F_HANDLE, &h)) {
Py_DECREF(v);
return NULL;
}
handles[i] = h;
Py_DECREF(v);
}
/* If this is the main thread then make the wait interruptible
by Ctrl-C unless we are waiting for *all* handles */
if (!wait_flag && _PyOS_IsMainThread()) {
sigint_event = _PyOS_SigintEvent();
assert(sigint_event != NULL);
handles[nhandles++] = sigint_event;
}
Py_BEGIN_ALLOW_THREADS
if (sigint_event != NULL)
ResetEvent(sigint_event);
result = WaitForMultipleObjects((DWORD) nhandles, handles,
wait_flag, milliseconds);
Py_END_ALLOW_THREADS
if (result == WAIT_FAILED)
return PyErr_SetExcFromWindowsErr(PyExc_OSError, 0);
else if (sigint_event != NULL && result == WAIT_OBJECT_0 + nhandles - 1) {
errno = EINTR;
return PyErr_SetFromErrno(PyExc_OSError);
}
return PyLong_FromLong((int) result);
}
/*[clinic input]
_winapi.WaitForSingleObject -> long
handle: HANDLE
milliseconds: DWORD
/
Wait for a single object.
Wait until the specified object is in the signaled state or
the time-out interval elapses. The timeout value is specified
in milliseconds.
[clinic start generated code]*/
static long
_winapi_WaitForSingleObject_impl(PyObject *module, HANDLE handle,
DWORD milliseconds)
/*[clinic end generated code: output=3c4715d8f1b39859 input=443d1ab076edc7b1]*/
{
DWORD result;
Py_BEGIN_ALLOW_THREADS
result = WaitForSingleObject(handle, milliseconds);
Py_END_ALLOW_THREADS
if (result == WAIT_FAILED) {
PyErr_SetFromWindowsErr(GetLastError());
return -1;
}
return result;
}
/*[clinic input]
_winapi.WriteFile
handle: HANDLE
buffer: object
overlapped as use_overlapped: bool(accept={int}) = False
[clinic start generated code]*/
static PyObject *
_winapi_WriteFile_impl(PyObject *module, HANDLE handle, PyObject *buffer,
int use_overlapped)
/*[clinic end generated code: output=2ca80f6bf3fa92e3 input=11eae2a03aa32731]*/
{
Py_buffer _buf, *buf;
DWORD len, written;
BOOL ret;
DWORD err;
OverlappedObject *overlapped = NULL;
if (use_overlapped) {
overlapped = new_overlapped(handle);
if (!overlapped)
return NULL;
buf = &overlapped->write_buffer;
}
else
buf = &_buf;
if (!PyArg_Parse(buffer, "y*", buf)) {
Py_XDECREF(overlapped);
return NULL;
}
Py_BEGIN_ALLOW_THREADS
len = (DWORD)Py_MIN(buf->len, PY_DWORD_MAX);
ret = WriteFile(handle, buf->buf, len, &written,
overlapped ? &overlapped->overlapped : NULL);
Py_END_ALLOW_THREADS
err = ret ? 0 : GetLastError();
if (overlapped) {
if (!ret) {
if (err == ERROR_IO_PENDING)
overlapped->pending = 1;
else {
Py_DECREF(overlapped);
return PyErr_SetExcFromWindowsErr(PyExc_OSError, 0);
}
}
return Py_BuildValue("NI", (PyObject *) overlapped, err);
}
PyBuffer_Release(buf);
if (!ret)
return PyErr_SetExcFromWindowsErr(PyExc_OSError, 0);
return Py_BuildValue("II", written, err);
}
/*[clinic input]
_winapi.GetACP
Get the current Windows ANSI code page identifier.
[clinic start generated code]*/
static PyObject *
_winapi_GetACP_impl(PyObject *module)
/*[clinic end generated code: output=f7ee24bf705dbb88 input=1433c96d03a05229]*/
{
return PyLong_FromUnsignedLong(GetACP());
}
/*[clinic input]
_winapi.GetFileType -> DWORD
handle: HANDLE
[clinic start generated code]*/
static DWORD
_winapi_GetFileType_impl(PyObject *module, HANDLE handle)
/*[clinic end generated code: output=92b8466ac76ecc17 input=0058366bc40bbfbf]*/
{
DWORD result;
Py_BEGIN_ALLOW_THREADS
result = GetFileType(handle);
Py_END_ALLOW_THREADS
if (result == FILE_TYPE_UNKNOWN && GetLastError() != NO_ERROR) {
PyErr_SetFromWindowsErr(0);
return -1;
}
return result;
}
static PyMethodDef winapi_functions[] = {
_WINAPI_CLOSEHANDLE_METHODDEF
_WINAPI_CONNECTNAMEDPIPE_METHODDEF
_WINAPI_CREATEFILE_METHODDEF
_WINAPI_CREATENAMEDPIPE_METHODDEF
_WINAPI_CREATEPIPE_METHODDEF
_WINAPI_CREATEPROCESS_METHODDEF
_WINAPI_CREATEJUNCTION_METHODDEF
_WINAPI_DUPLICATEHANDLE_METHODDEF
_WINAPI_EXITPROCESS_METHODDEF
_WINAPI_GETCURRENTPROCESS_METHODDEF
_WINAPI_GETEXITCODEPROCESS_METHODDEF
_WINAPI_GETLASTERROR_METHODDEF
_WINAPI_GETMODULEFILENAME_METHODDEF
_WINAPI_GETSTDHANDLE_METHODDEF
_WINAPI_GETVERSION_METHODDEF
_WINAPI_OPENPROCESS_METHODDEF
_WINAPI_PEEKNAMEDPIPE_METHODDEF
_WINAPI_READFILE_METHODDEF
_WINAPI_SETNAMEDPIPEHANDLESTATE_METHODDEF
_WINAPI_TERMINATEPROCESS_METHODDEF
_WINAPI_WAITNAMEDPIPE_METHODDEF
_WINAPI_WAITFORMULTIPLEOBJECTS_METHODDEF
_WINAPI_WAITFORSINGLEOBJECT_METHODDEF
_WINAPI_WRITEFILE_METHODDEF
_WINAPI_GETACP_METHODDEF
_WINAPI_GETFILETYPE_METHODDEF
{NULL, NULL}
};
static struct PyModuleDef winapi_module = {
PyModuleDef_HEAD_INIT,
"_winapi",
NULL,
-1,
winapi_functions,
NULL,
NULL,
NULL,
NULL
};
#define WINAPI_CONSTANT(fmt, con) \
PyDict_SetItemString(d, #con, Py_BuildValue(fmt, con))
PyMODINIT_FUNC
PyInit__winapi(void)
{
PyObject *d;
PyObject *m;
if (PyType_Ready(&OverlappedType) < 0)
return NULL;
m = PyModule_Create(&winapi_module);
if (m == NULL)
return NULL;
d = PyModule_GetDict(m);
PyDict_SetItemString(d, "Overlapped", (PyObject *) &OverlappedType);
/* constants */
WINAPI_CONSTANT(F_DWORD, CREATE_NEW_CONSOLE);
WINAPI_CONSTANT(F_DWORD, CREATE_NEW_PROCESS_GROUP);
WINAPI_CONSTANT(F_DWORD, DUPLICATE_SAME_ACCESS);
WINAPI_CONSTANT(F_DWORD, DUPLICATE_CLOSE_SOURCE);
WINAPI_CONSTANT(F_DWORD, ERROR_ALREADY_EXISTS);
WINAPI_CONSTANT(F_DWORD, ERROR_BROKEN_PIPE);
WINAPI_CONSTANT(F_DWORD, ERROR_IO_PENDING);
WINAPI_CONSTANT(F_DWORD, ERROR_MORE_DATA);
WINAPI_CONSTANT(F_DWORD, ERROR_NETNAME_DELETED);
WINAPI_CONSTANT(F_DWORD, ERROR_NO_SYSTEM_RESOURCES);
WINAPI_CONSTANT(F_DWORD, ERROR_MORE_DATA);
WINAPI_CONSTANT(F_DWORD, ERROR_NETNAME_DELETED);
WINAPI_CONSTANT(F_DWORD, ERROR_NO_DATA);
WINAPI_CONSTANT(F_DWORD, ERROR_NO_SYSTEM_RESOURCES);
WINAPI_CONSTANT(F_DWORD, ERROR_OPERATION_ABORTED);
WINAPI_CONSTANT(F_DWORD, ERROR_PIPE_BUSY);
WINAPI_CONSTANT(F_DWORD, ERROR_PIPE_CONNECTED);
WINAPI_CONSTANT(F_DWORD, ERROR_SEM_TIMEOUT);
WINAPI_CONSTANT(F_DWORD, FILE_FLAG_FIRST_PIPE_INSTANCE);
WINAPI_CONSTANT(F_DWORD, FILE_FLAG_OVERLAPPED);
WINAPI_CONSTANT(F_DWORD, FILE_GENERIC_READ);
WINAPI_CONSTANT(F_DWORD, FILE_GENERIC_WRITE);
WINAPI_CONSTANT(F_DWORD, GENERIC_READ);
WINAPI_CONSTANT(F_DWORD, GENERIC_WRITE);
WINAPI_CONSTANT(F_DWORD, INFINITE);
WINAPI_CONSTANT(F_DWORD, NMPWAIT_WAIT_FOREVER);
WINAPI_CONSTANT(F_DWORD, OPEN_EXISTING);
WINAPI_CONSTANT(F_DWORD, PIPE_ACCESS_DUPLEX);
WINAPI_CONSTANT(F_DWORD, PIPE_ACCESS_INBOUND);
WINAPI_CONSTANT(F_DWORD, PIPE_READMODE_MESSAGE);
WINAPI_CONSTANT(F_DWORD, PIPE_TYPE_MESSAGE);
WINAPI_CONSTANT(F_DWORD, PIPE_UNLIMITED_INSTANCES);
WINAPI_CONSTANT(F_DWORD, PIPE_WAIT);
WINAPI_CONSTANT(F_DWORD, PROCESS_ALL_ACCESS);
WINAPI_CONSTANT(F_DWORD, PROCESS_DUP_HANDLE);
WINAPI_CONSTANT(F_DWORD, STARTF_USESHOWWINDOW);
WINAPI_CONSTANT(F_DWORD, STARTF_USESTDHANDLES);
WINAPI_CONSTANT(F_DWORD, STD_INPUT_HANDLE);
WINAPI_CONSTANT(F_DWORD, STD_OUTPUT_HANDLE);
WINAPI_CONSTANT(F_DWORD, STD_ERROR_HANDLE);
WINAPI_CONSTANT(F_DWORD, STILL_ACTIVE);
WINAPI_CONSTANT(F_DWORD, SW_HIDE);
WINAPI_CONSTANT(F_DWORD, WAIT_OBJECT_0);
WINAPI_CONSTANT(F_DWORD, WAIT_ABANDONED_0);
WINAPI_CONSTANT(F_DWORD, WAIT_TIMEOUT);
WINAPI_CONSTANT(F_DWORD, ABOVE_NORMAL_PRIORITY_CLASS);
WINAPI_CONSTANT(F_DWORD, BELOW_NORMAL_PRIORITY_CLASS);
WINAPI_CONSTANT(F_DWORD, HIGH_PRIORITY_CLASS);
WINAPI_CONSTANT(F_DWORD, IDLE_PRIORITY_CLASS);
WINAPI_CONSTANT(F_DWORD, NORMAL_PRIORITY_CLASS);
WINAPI_CONSTANT(F_DWORD, REALTIME_PRIORITY_CLASS);
WINAPI_CONSTANT(F_DWORD, CREATE_NO_WINDOW);
WINAPI_CONSTANT(F_DWORD, DETACHED_PROCESS);
WINAPI_CONSTANT(F_DWORD, CREATE_DEFAULT_ERROR_MODE);
WINAPI_CONSTANT(F_DWORD, CREATE_BREAKAWAY_FROM_JOB);
WINAPI_CONSTANT(F_DWORD, FILE_TYPE_UNKNOWN);
WINAPI_CONSTANT(F_DWORD, FILE_TYPE_DISK);
WINAPI_CONSTANT(F_DWORD, FILE_TYPE_CHAR);
WINAPI_CONSTANT(F_DWORD, FILE_TYPE_PIPE);
WINAPI_CONSTANT(F_DWORD, FILE_TYPE_REMOTE);
WINAPI_CONSTANT("i", NULL);
return m;
}
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