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cpython/Modules/_winapi.c

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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>
#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 F_BOOL "i"
#define F_UINT "I"
#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) {
/* make it a programming error to deallocate while operation
is pending, even if we can safely cancel it */
if (check_CancelIoEx() &&
Py_CancelIoEx(self->handle, &self->overlapped))
GetOverlappedResult(self->handle, &self->overlapped, &bytes, TRUE);
PyErr_SetString(PyExc_RuntimeError,
"I/O operations still in flight while destroying "
"Overlapped object, the process may crash");
PyErr_WriteUnraisable(NULL);
}
CloseHandle(self->overlapped.hEvent);
SetLastError(err);
if (self->write_buffer.obj)
PyBuffer_Release(&self->write_buffer);
Py_CLEAR(self->read_buffer);
PyObject_Del(self);
}
static PyObject *
overlapped_GetOverlappedResult(OverlappedObject *self, PyObject *waitobj)
{
int wait;
BOOL res;
DWORD transferred = 0;
DWORD err;
wait = PyObject_IsTrue(waitobj);
if (wait < 0)
return NULL;
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_IOError, 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);
}
static PyObject *
overlapped_getbuffer(OverlappedObject *self)
{
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;
}
static PyObject *
overlapped_cancel(OverlappedObject *self)
{
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_IOError, 0);
self->pending = 0;
Py_RETURN_NONE;
}
static PyMethodDef overlapped_methods[] = {
{"GetOverlappedResult", (PyCFunction) overlapped_GetOverlappedResult,
METH_O, NULL},
{"getbuffer", (PyCFunction) overlapped_getbuffer, METH_NOARGS, NULL},
{"cancel", (PyCFunction) overlapped_cancel, METH_NOARGS, NULL},
{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 */
PyDoc_STRVAR(CloseHandle_doc,
"CloseHandle(handle) -> None\n\
\n\
Close handle.");
static PyObject *
winapi_CloseHandle(PyObject *self, PyObject *args)
{
HANDLE hObject;
BOOL success;
if (!PyArg_ParseTuple(args, F_HANDLE ":CloseHandle", &hObject))
return NULL;
Py_BEGIN_ALLOW_THREADS
success = CloseHandle(hObject);
Py_END_ALLOW_THREADS
if (!success)
return PyErr_SetFromWindowsErr(0);
Py_RETURN_NONE;
}
static PyObject *
winapi_ConnectNamedPipe(PyObject *self, PyObject *args, PyObject *kwds)
{
HANDLE hNamedPipe;
int use_overlapped = 0;
BOOL success;
OverlappedObject *overlapped = NULL;
static char *kwlist[] = {"handle", "overlapped", NULL};
if (!PyArg_ParseTupleAndKeywords(args, kwds,
F_HANDLE "|" F_BOOL, kwlist,
&hNamedPipe, &use_overlapped))
return NULL;
if (use_overlapped) {
overlapped = new_overlapped(hNamedPipe);
if (!overlapped)
return NULL;
}
Py_BEGIN_ALLOW_THREADS
success = ConnectNamedPipe(hNamedPipe,
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;
}
static PyObject *
winapi_CreateFile(PyObject *self, PyObject *args)
{
LPCTSTR lpFileName;
DWORD dwDesiredAccess;
DWORD dwShareMode;
LPSECURITY_ATTRIBUTES lpSecurityAttributes;
DWORD dwCreationDisposition;
DWORD dwFlagsAndAttributes;
HANDLE hTemplateFile;
HANDLE handle;
if (!PyArg_ParseTuple(args, "s" F_DWORD F_DWORD F_POINTER
F_DWORD F_DWORD F_HANDLE,
&lpFileName, &dwDesiredAccess, &dwShareMode,
&lpSecurityAttributes, &dwCreationDisposition,
&dwFlagsAndAttributes, &hTemplateFile))
return NULL;
Py_BEGIN_ALLOW_THREADS
handle = CreateFile(lpFileName, dwDesiredAccess,
dwShareMode, lpSecurityAttributes,
dwCreationDisposition,
dwFlagsAndAttributes, hTemplateFile);
Py_END_ALLOW_THREADS
if (handle == INVALID_HANDLE_VALUE)
return PyErr_SetFromWindowsErr(0);
return Py_BuildValue(F_HANDLE, handle);
}
static PyObject *
winapi_CreateNamedPipe(PyObject *self, PyObject *args)
{
LPCTSTR lpName;
DWORD dwOpenMode;
DWORD dwPipeMode;
DWORD nMaxInstances;
DWORD nOutBufferSize;
DWORD nInBufferSize;
DWORD nDefaultTimeOut;
LPSECURITY_ATTRIBUTES lpSecurityAttributes;
HANDLE handle;
if (!PyArg_ParseTuple(args, "s" F_DWORD F_DWORD F_DWORD
F_DWORD F_DWORD F_DWORD F_POINTER,
&lpName, &dwOpenMode, &dwPipeMode,
&nMaxInstances, &nOutBufferSize,
&nInBufferSize, &nDefaultTimeOut,
&lpSecurityAttributes))
return NULL;
Py_BEGIN_ALLOW_THREADS
handle = CreateNamedPipe(lpName, dwOpenMode, dwPipeMode,
nMaxInstances, nOutBufferSize,
nInBufferSize, nDefaultTimeOut,
lpSecurityAttributes);
Py_END_ALLOW_THREADS
if (handle == INVALID_HANDLE_VALUE)
return PyErr_SetFromWindowsErr(0);
return Py_BuildValue(F_HANDLE, 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 *
winapi_CreatePipe(PyObject* self, PyObject* args)
{
HANDLE read_pipe;
HANDLE write_pipe;
BOOL result;
PyObject* pipe_attributes; /* ignored */
DWORD size;
if (! PyArg_ParseTuple(args, "O" F_DWORD ":CreatePipe",
&pipe_attributes, &size))
return NULL;
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, 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, 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 enviroment string */
if (! PyMapping_Check(environment)) {
PyErr_SetString(
PyExc_TypeError, "environment must be dictionary or None");
return NULL;
}
envsize = PyMapping_Length(environment);
keys = PyMapping_Keys(environment);
values = PyMapping_Values(environment);
if (!keys || !values)
goto error;
totalsize = 1; /* trailing null character */
for (i = 0; i < envsize; i++) {
PyObject* key = PyList_GET_ITEM(keys, i);
PyObject* value = PyList_GET_ITEM(values, i);
if (! PyUnicode_Check(key) || ! PyUnicode_Check(value)) {
PyErr_SetString(PyExc_TypeError,
"environment can only contain strings");
goto error;
}
totalsize += PyUnicode_GET_LENGTH(key) + 1; /* +1 for '=' */
totalsize += PyUnicode_GET_LENGTH(value) + 1; /* +1 for '\0' */
}
buffer = PyMem_Malloc(totalsize * sizeof(Py_UCS4));
if (! buffer)
goto error;
p = buffer;
end = buffer + totalsize;
for (i = 0; i < envsize; i++) {
PyObject* key = PyList_GET_ITEM(keys, i);
PyObject* value = PyList_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;
}
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 *
winapi_CreateProcess(PyObject* self, PyObject* args)
{
BOOL result;
PROCESS_INFORMATION pi;
STARTUPINFOW si;
PyObject* environment;
wchar_t *wenvironment;
wchar_t* application_name;
wchar_t* command_line;
PyObject* process_attributes; /* ignored */
PyObject* thread_attributes; /* ignored */
BOOL inherit_handles;
DWORD creation_flags;
PyObject* env_mapping;
wchar_t* current_directory;
PyObject* startup_info;
if (! PyArg_ParseTuple(args, "ZZOO" F_BOOL F_DWORD "OZO:CreateProcess",
&application_name,
&command_line,
&process_attributes,
&thread_attributes,
&inherit_handles,
&creation_flags,
&env_mapping,
&current_directory,
&startup_info))
return NULL;
ZeroMemory(&si, sizeof(si));
si.cb = sizeof(si);
/* note: we only support a small subset of all SI attributes */
si.dwFlags = getulong(startup_info, "dwFlags");
si.wShowWindow = (WORD)getulong(startup_info, "wShowWindow");
si.hStdInput = gethandle(startup_info, "hStdInput");
si.hStdOutput = gethandle(startup_info, "hStdOutput");
si.hStdError = gethandle(startup_info, "hStdError");
if (PyErr_Occurred())
return NULL;
if (env_mapping != Py_None) {
environment = getenvironment(env_mapping);
if (! environment)
return NULL;
wenvironment = PyUnicode_AsUnicode(environment);
if (wenvironment == NULL)
{
Py_XDECREF(environment);
return NULL;
}
}
else {
environment = NULL;
wenvironment = NULL;
}
Py_BEGIN_ALLOW_THREADS
result = CreateProcessW(application_name,
command_line,
NULL,
NULL,
inherit_handles,
creation_flags | CREATE_UNICODE_ENVIRONMENT,
wenvironment,
current_directory,
&si,
&pi);
Py_END_ALLOW_THREADS
Py_XDECREF(environment);
if (! result)
return PyErr_SetFromWindowsErr(GetLastError());
return Py_BuildValue("NNkk",
HANDLE_TO_PYNUM(pi.hProcess),
HANDLE_TO_PYNUM(pi.hThread),
pi.dwProcessId,
pi.dwThreadId);
}
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 *
winapi_DuplicateHandle(PyObject* self, PyObject* args)
{
HANDLE target_handle;
BOOL result;
HANDLE source_process_handle;
HANDLE source_handle;
HANDLE target_process_handle;
DWORD desired_access;
BOOL inherit_handle;
DWORD options = 0;
if (! PyArg_ParseTuple(args,
F_HANDLE F_HANDLE F_HANDLE F_DWORD F_BOOL F_DWORD
":DuplicateHandle",
&source_process_handle,
&source_handle,
&target_process_handle,
&desired_access,
&inherit_handle,
&options))
return NULL;
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)
return PyErr_SetFromWindowsErr(GetLastError());
return HANDLE_TO_PYNUM(target_handle);
}
static PyObject *
winapi_ExitProcess(PyObject *self, PyObject *args)
{
UINT uExitCode;
if (!PyArg_ParseTuple(args, F_UINT, &uExitCode))
return NULL;
#if defined(Py_DEBUG)
SetErrorMode(SEM_FAILCRITICALERRORS|SEM_NOALIGNMENTFAULTEXCEPT|
SEM_NOGPFAULTERRORBOX|SEM_NOOPENFILEERRORBOX);
_CrtSetReportMode(_CRT_ASSERT, _CRTDBG_MODE_DEBUG);
#endif
ExitProcess(uExitCode);
return NULL;
}
PyDoc_STRVAR(GetCurrentProcess_doc,
"GetCurrentProcess() -> handle\n\
\n\
Return a handle object for the current process.");
static PyObject *
winapi_GetCurrentProcess(PyObject* self, PyObject* args)
{
if (! PyArg_ParseTuple(args, ":GetCurrentProcess"))
return NULL;
return HANDLE_TO_PYNUM(GetCurrentProcess());
}
PyDoc_STRVAR(GetExitCodeProcess_doc,
"GetExitCodeProcess(handle) -> Exit code\n\
\n\
Return the termination status of the specified process.");
static PyObject *
winapi_GetExitCodeProcess(PyObject* self, PyObject* args)
{
DWORD exit_code;
BOOL result;
HANDLE process;
if (! PyArg_ParseTuple(args, F_HANDLE ":GetExitCodeProcess", &process))
return NULL;
result = GetExitCodeProcess(process, &exit_code);
if (! result)
return PyErr_SetFromWindowsErr(GetLastError());
return PyLong_FromUnsignedLong(exit_code);
}
static PyObject *
winapi_GetLastError(PyObject *self, PyObject *args)
{
return Py_BuildValue(F_DWORD, GetLastError());
}
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 *
winapi_GetModuleFileName(PyObject* self, PyObject* args)
{
BOOL result;
HMODULE module;
WCHAR filename[MAX_PATH];
if (! PyArg_ParseTuple(args, F_HANDLE ":GetModuleFileName",
&module))
return NULL;
result = GetModuleFileNameW(module, filename, MAX_PATH);
filename[MAX_PATH-1] = '\0';
if (! result)
return PyErr_SetFromWindowsErr(GetLastError());
return PyUnicode_FromWideChar(filename, wcslen(filename));
}
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 *
winapi_GetStdHandle(PyObject* self, PyObject* args)
{
HANDLE handle;
DWORD std_handle;
if (! PyArg_ParseTuple(args, F_DWORD ":GetStdHandle", &std_handle))
return NULL;
Py_BEGIN_ALLOW_THREADS
handle = GetStdHandle(std_handle);
Py_END_ALLOW_THREADS
if (handle == INVALID_HANDLE_VALUE)
return PyErr_SetFromWindowsErr(GetLastError());
if (! handle) {
Py_INCREF(Py_None);
return Py_None;
}
/* note: returns integer, not handle object */
return HANDLE_TO_PYNUM(handle);
}
PyDoc_STRVAR(GetVersion_doc,
"GetVersion() -> version\n\
\n\
Return the version number of the current operating system.");
static PyObject *
winapi_GetVersion(PyObject* self, PyObject* args)
{
if (! PyArg_ParseTuple(args, ":GetVersion"))
return NULL;
return PyLong_FromUnsignedLong(GetVersion());
}
static PyObject *
winapi_OpenProcess(PyObject *self, PyObject *args)
{
DWORD dwDesiredAccess;
BOOL bInheritHandle;
DWORD dwProcessId;
HANDLE handle;
if (!PyArg_ParseTuple(args, F_DWORD F_BOOL F_DWORD,
&dwDesiredAccess, &bInheritHandle, &dwProcessId))
return NULL;
handle = OpenProcess(dwDesiredAccess, bInheritHandle, dwProcessId);
if (handle == NULL)
return PyErr_SetFromWindowsErr(0);
return Py_BuildValue(F_HANDLE, handle);
}
static PyObject *
winapi_PeekNamedPipe(PyObject *self, PyObject *args)
{
HANDLE handle;
int size = 0;
PyObject *buf = NULL;
DWORD nread, navail, nleft;
BOOL ret;
if (!PyArg_ParseTuple(args, F_HANDLE "|i:PeekNamedPipe" , &handle, &size))
return NULL;
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_IOError, 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_IOError, 0);
}
return Py_BuildValue("ii", navail, nleft);
}
}
static PyObject *
winapi_ReadFile(PyObject *self, PyObject *args, PyObject *kwds)
{
HANDLE handle;
int size;
DWORD nread;
PyObject *buf;
BOOL ret;
int use_overlapped = 0;
DWORD err;
OverlappedObject *overlapped = NULL;
static char *kwlist[] = {"handle", "size", "overlapped", NULL};
if (!PyArg_ParseTupleAndKeywords(args, kwds,
F_HANDLE "i|i:ReadFile", kwlist,
&handle, &size, &use_overlapped))
return 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_IOError, 0);
}
}
return Py_BuildValue("NI", (PyObject *) overlapped, err);
}
if (!ret && err != ERROR_MORE_DATA) {
Py_DECREF(buf);
return PyErr_SetExcFromWindowsErr(PyExc_IOError, 0);
}
if (_PyBytes_Resize(&buf, nread))
return NULL;
return Py_BuildValue("NI", buf, err);
}
static PyObject *
winapi_SetNamedPipeHandleState(PyObject *self, PyObject *args)
{
HANDLE hNamedPipe;
PyObject *oArgs[3];
DWORD dwArgs[3], *pArgs[3] = {NULL, NULL, NULL};
int i;
if (!PyArg_ParseTuple(args, F_HANDLE "OOO",
&hNamedPipe, &oArgs[0], &oArgs[1], &oArgs[2]))
return NULL;
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(hNamedPipe, pArgs[0], pArgs[1], pArgs[2]))
return PyErr_SetFromWindowsErr(0);
Py_RETURN_NONE;
}
PyDoc_STRVAR(TerminateProcess_doc,
"TerminateProcess(handle, exit_code) -> None\n\
\n\
Terminate the specified process and all of its threads.");
static PyObject *
winapi_TerminateProcess(PyObject* self, PyObject* args)
{
BOOL result;
HANDLE process;
UINT exit_code;
if (! PyArg_ParseTuple(args, F_HANDLE F_UINT ":TerminateProcess",
&process, &exit_code))
return NULL;
result = TerminateProcess(process, exit_code);
if (! result)
return PyErr_SetFromWindowsErr(GetLastError());
Py_INCREF(Py_None);
return Py_None;
}
static PyObject *
winapi_WaitNamedPipe(PyObject *self, PyObject *args)
{
LPCTSTR lpNamedPipeName;
DWORD nTimeOut;
BOOL success;
if (!PyArg_ParseTuple(args, "s" F_DWORD, &lpNamedPipeName, &nTimeOut))
return NULL;
Py_BEGIN_ALLOW_THREADS
success = WaitNamedPipe(lpNamedPipeName, nTimeOut);
Py_END_ALLOW_THREADS
if (!success)
return PyErr_SetFromWindowsErr(0);
Py_RETURN_NONE;
}
static PyObject *
winapi_WaitForMultipleObjects(PyObject* self, PyObject* args)
{
DWORD result;
PyObject *handle_seq;
HANDLE handles[MAXIMUM_WAIT_OBJECTS];
HANDLE sigint_event = NULL;
Py_ssize_t nhandles, i;
BOOL wait_flag;
DWORD milliseconds = INFINITE;
if (!PyArg_ParseTuple(args, "O" F_BOOL "|" F_DWORD
":WaitForMultipleObjects",
&handle_seq, &wait_flag, &milliseconds))
return NULL;
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_IOError, 0);
else if (sigint_event != NULL && result == WAIT_OBJECT_0 + nhandles - 1) {
errno = EINTR;
return PyErr_SetFromErrno(PyExc_IOError);
}
return PyLong_FromLong((int) result);
}
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 *
winapi_WaitForSingleObject(PyObject* self, PyObject* args)
{
DWORD result;
HANDLE handle;
DWORD milliseconds;
if (! PyArg_ParseTuple(args, F_HANDLE F_DWORD ":WaitForSingleObject",
&handle,
&milliseconds))
return NULL;
Py_BEGIN_ALLOW_THREADS
result = WaitForSingleObject(handle, milliseconds);
Py_END_ALLOW_THREADS
if (result == WAIT_FAILED)
return PyErr_SetFromWindowsErr(GetLastError());
return PyLong_FromUnsignedLong(result);
}
static PyObject *
winapi_WriteFile(PyObject *self, PyObject *args, PyObject *kwds)
{
HANDLE handle;
Py_buffer _buf, *buf;
PyObject *bufobj;
DWORD written;
BOOL ret;
int use_overlapped = 0;
DWORD err;
OverlappedObject *overlapped = NULL;
static char *kwlist[] = {"handle", "buffer", "overlapped", NULL};
/* First get handle and use_overlapped to know which Py_buffer to use */
if (!PyArg_ParseTupleAndKeywords(args, kwds,
F_HANDLE "O|i:WriteFile", kwlist,
&handle, &bufobj, &use_overlapped))
return NULL;
if (use_overlapped) {
overlapped = new_overlapped(handle);
if (!overlapped)
return NULL;
buf = &overlapped->write_buffer;
}
else
buf = &_buf;
if (!PyArg_Parse(bufobj, "y*", buf)) {
Py_XDECREF(overlapped);
return NULL;
}
Py_BEGIN_ALLOW_THREADS
ret = WriteFile(handle, buf->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_IOError, 0);
}
}
return Py_BuildValue("NI", (PyObject *) overlapped, err);
}
PyBuffer_Release(buf);
if (!ret)
return PyErr_SetExcFromWindowsErr(PyExc_IOError, 0);
return Py_BuildValue("II", written, err);
}
static PyMethodDef winapi_functions[] = {
{"CloseHandle", winapi_CloseHandle, METH_VARARGS,
CloseHandle_doc},
{"ConnectNamedPipe", (PyCFunction)winapi_ConnectNamedPipe,
METH_VARARGS | METH_KEYWORDS, ""},
{"CreateFile", winapi_CreateFile, METH_VARARGS,
""},
{"CreateNamedPipe", winapi_CreateNamedPipe, METH_VARARGS,
""},
{"CreatePipe", winapi_CreatePipe, METH_VARARGS,
CreatePipe_doc},
{"CreateProcess", winapi_CreateProcess, METH_VARARGS,
CreateProcess_doc},
{"DuplicateHandle", winapi_DuplicateHandle, METH_VARARGS,
DuplicateHandle_doc},
{"ExitProcess", winapi_ExitProcess, METH_VARARGS,
""},
{"GetCurrentProcess", winapi_GetCurrentProcess, METH_VARARGS,
GetCurrentProcess_doc},
{"GetExitCodeProcess", winapi_GetExitCodeProcess, METH_VARARGS,
GetExitCodeProcess_doc},
{"GetLastError", winapi_GetLastError, METH_NOARGS,
GetCurrentProcess_doc},
{"GetModuleFileName", winapi_GetModuleFileName, METH_VARARGS,
GetModuleFileName_doc},
{"GetStdHandle", winapi_GetStdHandle, METH_VARARGS,
GetStdHandle_doc},
{"GetVersion", winapi_GetVersion, METH_VARARGS,
GetVersion_doc},
{"OpenProcess", winapi_OpenProcess, METH_VARARGS,
""},
{"PeekNamedPipe", winapi_PeekNamedPipe, METH_VARARGS,
""},
{"ReadFile", (PyCFunction)winapi_ReadFile, METH_VARARGS | METH_KEYWORDS,
""},
{"SetNamedPipeHandleState", winapi_SetNamedPipeHandleState, METH_VARARGS,
""},
{"TerminateProcess", winapi_TerminateProcess, METH_VARARGS,
TerminateProcess_doc},
{"WaitNamedPipe", winapi_WaitNamedPipe, METH_VARARGS,
""},
{"WaitForMultipleObjects", winapi_WaitForMultipleObjects, METH_VARARGS,
""},
{"WaitForSingleObject", winapi_WaitForSingleObject, METH_VARARGS,
WaitForSingleObject_doc},
{"WriteFile", (PyCFunction)winapi_WriteFile, METH_VARARGS | METH_KEYWORDS,
""},
{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_TIMEOUT);
WINAPI_CONSTANT("i", NULL);
return m;
}
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