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GeezerVison is showing github.com — cpython/Modules/_winapi.c at 3.14 · python/cpython Expand file tree/ Copy path_winapi.cMore file actions 3263 lines (2758 loc) · 94.6 KB / Copy path_winapi.cFile metadata and controls3263 lines (2758 loc) · 94.6 KB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 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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" #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) { return NULL; } if (sort_environment_keys(keys) < 0) { Py_DECREF(keys); return NULL; } |
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