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3492 lines (2945 loc) · 101 KB
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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 https://www.python.org/2.4/license for licensing details. */
#include "Python.h"
#include "pycore_moduleobject.h" // _PyModule_GetState()
#include "pycore_pylifecycle.h" // _Py_IsInterpreterFinalizing()
#include "pycore_pystate.h" // _PyInterpreterState_GET
#include "pycore_unicodeobject.h" // for Argument Clinic
#ifndef WINDOWS_LEAN_AND_MEAN
# define WINDOWS_LEAN_AND_MEAN
#endif
#include <windows.h>
#include <winioctl.h>
#include <crtdbg.h>
#include "winreparse.h"
// PSAPI_VERSION=2 redirects GetProcessMemoryInfo() to
// K32GetProcessMemoryInfo() in kernel32.dll, so we don't need to link
// psapi.lib. See:
// https://learn.microsoft.com/windows/win32/api/psapi/nf-psapi-getprocessmemoryinfo
#define PSAPI_VERSION 2
#include <psapi.h> // GetProcessMemoryInfo()
#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 Py_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 Py_T_ULONGLONG
#endif
#define F_HANDLE F_POINTER
#define F_DWORD "k"
#define T_HANDLE T_POINTER
// winbase.h limits the STARTF_* flags to the desktop API as of 10.0.19041.
#ifndef STARTF_USESHOWWINDOW
#define STARTF_USESHOWWINDOW 0x00000001
#endif
#ifndef STARTF_USESIZE
#define STARTF_USESIZE 0x00000002
#endif
#ifndef STARTF_USEPOSITION
#define STARTF_USEPOSITION 0x00000004
#endif
#ifndef STARTF_USECOUNTCHARS
#define STARTF_USECOUNTCHARS 0x00000008
#endif
#ifndef STARTF_USEFILLATTRIBUTE
#define STARTF_USEFILLATTRIBUTE 0x00000010
#endif
#ifndef STARTF_RUNFULLSCREEN
#define STARTF_RUNFULLSCREEN 0x00000020
#endif
#ifndef STARTF_FORCEONFEEDBACK
#define STARTF_FORCEONFEEDBACK 0x00000040
#endif
#ifndef STARTF_FORCEOFFFEEDBACK
#define STARTF_FORCEOFFFEEDBACK 0x00000080
#endif
#ifndef STARTF_USESTDHANDLES
#define STARTF_USESTDHANDLES 0x00000100
#endif
#ifndef STARTF_USEHOTKEY
#define STARTF_USEHOTKEY 0x00000200
#endif
#ifndef STARTF_TITLEISLINKNAME
#define STARTF_TITLEISLINKNAME 0x00000800
#endif
#ifndef STARTF_TITLEISAPPID
#define STARTF_TITLEISAPPID 0x00001000
#endif
#ifndef STARTF_PREVENTPINNING
#define STARTF_PREVENTPINNING 0x00002000
#endif
#ifndef STARTF_UNTRUSTEDSOURCE
#define STARTF_UNTRUSTEDSOURCE 0x00008000
#endif
typedef struct {
PyTypeObject *overlapped_type;
} WinApiState;
static inline WinApiState*
winapi_get_state(PyObject *module)
{
void *state = _PyModule_GetState(module);
assert(state != NULL);
return (WinApiState *)state;
}
/*
* 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;
#define OverlappedObject_CAST(op) ((OverlappedObject *)(op))
/*
Note: tp_clear (overlapped_clear) is not implemented because it
requires cancelling the IO operation if it's pending and the cancellation is
quite complex and can fail (see: overlapped_dealloc).
*/
static int
overlapped_traverse(PyObject *op, visitproc visit, void *arg)
{
OverlappedObject *self = OverlappedObject_CAST(op);
Py_VISIT(self->read_buffer);
Py_VISIT(self->write_buffer.obj);
Py_VISIT(Py_TYPE(self));
return 0;
}
static void
overlapped_dealloc(PyObject *op)
{
DWORD bytes;
int err = GetLastError();
OverlappedObject *self = OverlappedObject_CAST(op);
PyObject_GC_UnTrack(self);
if (self->pending) {
if (CancelIoEx(self->handle, &self->overlapped) &&
GetOverlappedResult(self->handle, &self->overlapped, &bytes, TRUE))
{
/* The operation is no longer pending -- nothing to do. */
}
else if (_Py_IsInterpreterFinalizing(_PyInterpreterState_GET())) {
/* The operation is still pending -- give a warning. This
will probably only happen on Windows XP. */
PyErr_SetString(PyExc_PythonFinalizationError,
"I/O operations still in flight while destroying "
"Overlapped object, the process may crash");
PyErr_FormatUnraisable("Exception ignored while deallocating "
"overlapped operation %R", self);
}
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);
PyTypeObject *tp = Py_TYPE(self);
tp->tp_free(self);
Py_DECREF(tp);
}
/*[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('LPCVOID', '" 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('UINT', 'I') # F_UINT used previously (always 'I')
class LPCWSTR_converter(Py_UNICODE_converter):
type = 'LPCWSTR'
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 = PyLong_FromUnsignedLong(_return_value);\n')
class LPVOID_return_converter(CReturnConverter):
type = 'LPVOID'
def render(self, function, data):
self.declare(data)
self.err_occurred_if("_return_value == NULL", data)
data.return_conversion.append(
'return_value = HANDLE_TO_PYNUM(_return_value);\n')
[python start generated code]*/
/*[python end generated code: output=da39a3ee5e6b4b0d input=da0a4db751936ee7]*/
#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;
return Py_NewRef(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
res = CancelIoEx(self->handle, &self->overlapped);
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),
Py_READONLY, "overlapped event handle"},
{NULL}
};
static PyType_Slot winapi_overlapped_type_slots[] = {
{Py_tp_traverse, overlapped_traverse},
{Py_tp_dealloc, overlapped_dealloc},
{Py_tp_doc, "OVERLAPPED structure wrapper"},
{Py_tp_methods, overlapped_methods},
{Py_tp_members, overlapped_members},
{0,0}
};
static PyType_Spec winapi_overlapped_type_spec = {
.name = "_winapi.Overlapped",
.basicsize = sizeof(OverlappedObject),
.flags = (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_DISALLOW_INSTANTIATION |
Py_TPFLAGS_HAVE_GC | Py_TPFLAGS_IMMUTABLETYPE),
.slots = winapi_overlapped_type_slots,
};
static OverlappedObject *
new_overlapped(PyObject *module, HANDLE handle)
{
WinApiState *st = winapi_get_state(module);
OverlappedObject *self = PyObject_GC_New(OverlappedObject, st->overlapped_type);
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);
PyObject_GC_Track(self);
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 = False
[clinic start generated code]*/
static PyObject *
_winapi_ConnectNamedPipe_impl(PyObject *module, HANDLE handle,
int use_overlapped)
/*[clinic end generated code: output=335a0e7086800671 input=a80e56e8bd370e31]*/
{
BOOL success;
OverlappedObject *overlapped = NULL;
if (use_overlapped) {
overlapped = new_overlapped(module, 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.CreateEventW -> HANDLE
security_attributes: LPSECURITY_ATTRIBUTES
manual_reset: BOOL
initial_state: BOOL
name: LPCWSTR(accept={str, NoneType})
[clinic start generated code]*/
static HANDLE
_winapi_CreateEventW_impl(PyObject *module,
LPSECURITY_ATTRIBUTES security_attributes,
BOOL manual_reset, BOOL initial_state,
LPCWSTR name)
/*[clinic end generated code: output=2d4c7d5852ecb298 input=4187cee28ac763f8]*/
{
HANDLE handle;
if (PySys_Audit("_winapi.CreateEventW", "bbu", manual_reset, initial_state, name) < 0) {
return INVALID_HANDLE_VALUE;
}
Py_BEGIN_ALLOW_THREADS
handle = CreateEventW(security_attributes, manual_reset, initial_state, name);
Py_END_ALLOW_THREADS
if (handle == INVALID_HANDLE_VALUE) {
PyErr_SetFromWindowsErr(0);
}
return handle;
}
/*[clinic input]
_winapi.CreateFile -> HANDLE
file_name: LPCWSTR
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, LPCWSTR 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=818c811e5e04d550 input=1fa870ed1c2e3d69]*/
{
HANDLE handle;
if (PySys_Audit("_winapi.CreateFile", "ukkkk",
file_name, desired_access, share_mode,
creation_disposition, flags_and_attributes) < 0) {
return INVALID_HANDLE_VALUE;
}
Py_BEGIN_ALLOW_THREADS
handle = CreateFileW(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.CreateFileMapping -> HANDLE
file_handle: HANDLE
security_attributes: LPSECURITY_ATTRIBUTES
protect: DWORD
max_size_high: DWORD
max_size_low: DWORD
name: LPCWSTR
/
[clinic start generated code]*/
static HANDLE
_winapi_CreateFileMapping_impl(PyObject *module, HANDLE file_handle,
LPSECURITY_ATTRIBUTES security_attributes,
DWORD protect, DWORD max_size_high,
DWORD max_size_low, LPCWSTR name)
/*[clinic end generated code: output=6c0a4d5cf7f6fcc6 input=3dc5cf762a74dee8]*/
{
HANDLE handle;
Py_BEGIN_ALLOW_THREADS
handle = CreateFileMappingW(file_handle, security_attributes,
protect, max_size_high, max_size_low,
name);
Py_END_ALLOW_THREADS
if (handle == NULL) {
PyObject *temp = PyUnicode_FromWideChar(name, -1);
PyErr_SetExcFromWindowsErrWithFilenameObject(PyExc_OSError, 0, temp);
Py_XDECREF(temp);
handle = INVALID_HANDLE_VALUE;
}
return handle;
}
/*[clinic input]
_winapi.CreateJunction
src_path: LPCWSTR
dst_path: LPCWSTR
/
[clinic start generated code]*/
static PyObject *
_winapi_CreateJunction_impl(PyObject *module, LPCWSTR src_path,
LPCWSTR dst_path)
/*[clinic end generated code: output=44b3f5e9bbcc4271 input=963d29b44b9384a7]*/
{
/* Privilege adjustment */
HANDLE token = NULL;
struct {
TOKEN_PRIVILEGES base;
/* overallocate by a few array elements */
LUID_AND_ATTRIBUTES privs[4];
} tp, previousTp;
DWORD previousTpSize = 0;
/* 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);
if (PySys_Audit("_winapi.CreateJunction", "uu", src_path, dst_path) < 0) {
return NULL;
}
/* Adjust privileges to allow rewriting directory entry as a
junction point. */
if (!OpenProcessToken(GetCurrentProcess(),
TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &token)) {
goto cleanup;
}
if (!LookupPrivilegeValue(NULL, SE_RESTORE_NAME, &tp.base.Privileges[0].Luid)) {
goto cleanup;
}
tp.base.PrivilegeCount = 1;
tp.base.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
if (!AdjustTokenPrivileges(token, FALSE, &tp.base, sizeof(previousTp),
&previousTp.base, &previousTpSize)) {
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_RawCalloc(1, rdb_size);
if (rdb == NULL)
goto cleanup;
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();
if (previousTpSize) {
AdjustTokenPrivileges(token, FALSE, &previousTp.base, previousTpSize,
NULL, NULL);
}
if (token != NULL)
CloseHandle(token);
if (junction != NULL)
CloseHandle(junction);
PyMem_RawFree(rdb);
if (ret != 0)
return PyErr_SetFromWindowsErr(ret);
Py_RETURN_NONE;
}
/*[clinic input]
_winapi.CreateMutexW -> HANDLE
security_attributes: LPSECURITY_ATTRIBUTES
initial_owner: BOOL
name: LPCWSTR(accept={str, NoneType})
[clinic start generated code]*/
static HANDLE
_winapi_CreateMutexW_impl(PyObject *module,
LPSECURITY_ATTRIBUTES security_attributes,
BOOL initial_owner, LPCWSTR name)
/*[clinic end generated code: output=31b9ee8fc37e49a5 input=7d54b921e723254a]*/
{
HANDLE handle;
if (PySys_Audit("_winapi.CreateMutexW", "bu", initial_owner, name) < 0) {
return INVALID_HANDLE_VALUE;
}
Py_BEGIN_ALLOW_THREADS
handle = CreateMutexW(security_attributes, initial_owner, name);
Py_END_ALLOW_THREADS
if (handle == INVALID_HANDLE_VALUE) {
PyErr_SetFromWindowsErr(0);
}
return handle;
}
/*[clinic input]
_winapi.CreateNamedPipe -> HANDLE
name: LPCWSTR
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, LPCWSTR 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=7d6fde93227680ba input=5bd4e4a55639ee02]*/
{
HANDLE handle;
if (PySys_Audit("_winapi.CreateNamedPipe", "ukk",
name, open_mode, pipe_mode) < 0) {
return INVALID_HANDLE_VALUE;
}
Py_BEGIN_ALLOW_THREADS
handle = CreateNamedPipeW(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;
if (PySys_Audit("_winapi.CreatePipe", NULL) < 0) {
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, 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 *
sortenvironmentkey(PyObject *module, PyObject *item)
{
return _winapi_LCMapStringEx_impl(NULL, LOCALE_NAME_INVARIANT,
LCMAP_UPPERCASE, item);
}
static PyMethodDef sortenvironmentkey_def = {
"sortenvironmentkey", _PyCFunction_CAST(sortenvironmentkey), METH_O, "",
};
static int
sort_environment_keys(PyObject *keys)
{
PyObject *keyfunc = PyCFunction_New(&sortenvironmentkey_def, NULL);
if (keyfunc == NULL) {
return -1;
}
PyObject *kwnames = Py_BuildValue("(s)", "key");
if (kwnames == NULL) {
Py_DECREF(keyfunc);
return -1;
}
PyObject *args[] = { keys, keyfunc };
PyObject *ret = PyObject_VectorcallMethod(&_Py_ID(sort), args, 1, kwnames);
Py_DECREF(keyfunc);
Py_DECREF(kwnames);
if (ret == NULL) {
return -1;
}
Py_DECREF(ret);
return 0;
}
static int
compare_string_ordinal(PyObject *str1, PyObject *str2, int *result)
{
wchar_t *s1 = PyUnicode_AsWideCharString(str1, NULL);
if (s1 == NULL) {
return -1;
}
wchar_t *s2 = PyUnicode_AsWideCharString(str2, NULL);
if (s2 == NULL) {
PyMem_Free(s1);
return -1;
}
*result = CompareStringOrdinal(s1, -1, s2, -1, TRUE);
PyMem_Free(s1);
PyMem_Free(s2);
return 0;
}
static PyObject *
dedup_environment_keys(PyObject *keys)
{
PyObject *result = PyList_New(0);
if (result == NULL) {
return NULL;
}
// Iterate over the pre-ordered keys, check whether the current key is equal
// to the next key (ignoring case), if different, insert the current value
// into the result list. If they are equal, do nothing because we always
// want to keep the last inserted one.
for (Py_ssize_t i = 0; i < PyList_GET_SIZE(keys); i++) {
PyObject *key = PyList_GET_ITEM(keys, i);
// The last key will always be kept.
if (i + 1 == PyList_GET_SIZE(keys)) {
if (PyList_Append(result, key) < 0) {
Py_DECREF(result);
return NULL;
}
continue;
}
PyObject *next_key = PyList_GET_ITEM(keys, i + 1);
int compare_result;
if (compare_string_ordinal(key, next_key, &compare_result) < 0) {
Py_DECREF(result);
return NULL;
}
if (compare_result == CSTR_EQUAL) {
continue;
}
if (PyList_Append(result, key) < 0) {
Py_DECREF(result);
return NULL;
}
}
return result;
}
static PyObject *
normalize_environment(PyObject *environment)
{
PyObject *keys = PyMapping_Keys(environment);
if (keys == NULL) {