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_winapi.c
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_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>
#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
#define DWORD_MAX 4294967295U
/* 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_Finalizing == NULL)
{
/* 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 == 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=94819e72d2c6d558]*/
#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_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);
}
/*[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_IOError, 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: int(c_default='0') = False
[clinic start generated code]*/
static PyObject *
_winapi_ConnectNamedPipe_impl(PyObject *module, HANDLE handle,
int use_overlapped)
/*[clinic end generated code: output=335a0e7086800671 input=edc83da007ebf3be]*/
{
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;
}
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;
}
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 = 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;
}
/*[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]*/
{
BOOL result;
PROCESS_INFORMATION pi;
STARTUPINFOW si;
PyObject* environment;
wchar_t *wenvironment;
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);
}
/*[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 = 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]*/