[Python-checkins] python/dist/src/PC _subprocess.c,NONE,1.1
effbot at users.sourceforge.net
effbot at users.sourceforge.net
Tue Oct 12 17:26:31 CEST 2004
Update of /cvsroot/python/python/dist/src/PC
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv24287/PC
Added Files:
_subprocess.c
Log Message:
Added Peter Astrand's subprocess module.
--- NEW FILE: _subprocess.c ---
/*
* support routines for subprocess module
*
* Currently, this extension module is only required when using the
* subprocess module on Windows, but in the future, stubs for other
* platforms might be added here as well.
*
* Copyright (c) 2004 by Fredrik Lundh <fredrik at pythonware.com>
* Copyright (c) 2004 by Secret Labs AB, http://www.pythonware.com
* Copyright (c) 2004 by Peter Astrand <astrand at 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.
*
*/
/* TODO: handle unicode command lines? */
/* TODO: handle unicode environment? */
#include "Python.h"
#define WINDOWS_LEAN_AND_MEAN
#include "windows.h"
/* -------------------------------------------------------------------- */
/* handle wrapper. note that this library uses integers when passing
handles to a function, and handle wrappers when returning handles.
the wrapper is used to provide Detach and Close methods */
typedef struct {
PyObject_HEAD
HANDLE handle;
} sp_handle_object;
staticforward PyTypeObject sp_handle_type;
static PyObject*
sp_handle_new(HANDLE handle)
{
sp_handle_object* self;
self = PyObject_NEW(sp_handle_object, &sp_handle_type);
if (self == NULL)
return NULL;
self->handle = handle;
return (PyObject*) self;
}
static PyObject*
sp_handle_detach(sp_handle_object* self, PyObject* args)
{
HANDLE handle;
if (!PyArg_ParseTuple(args, ":Detach"))
return NULL;
handle = self->handle;
self->handle = NULL;
/* note: return the current handle, as an integer */
return PyInt_FromLong((long) handle);
}
static PyObject*
sp_handle_close(sp_handle_object* self, PyObject* args)
{
if (!PyArg_ParseTuple(args, ":Close"))
return NULL;
if (self->handle != INVALID_HANDLE_VALUE) {
CloseHandle(self->handle);
self->handle = INVALID_HANDLE_VALUE;
}
Py_INCREF(Py_None);
return Py_None;
}
static void
sp_handle_dealloc(sp_handle_object* self)
{
if (self->handle != INVALID_HANDLE_VALUE)
CloseHandle(self->handle);
PyMem_DEL(self);
}
static PyMethodDef sp_handle_methods[] = {
{"Detach", (PyCFunction) sp_handle_detach, 1},
{"Close", (PyCFunction) sp_handle_close, 1},
{NULL, NULL}
};
static PyObject*
sp_handle_getattr(sp_handle_object* self, char* name)
{
return Py_FindMethod(sp_handle_methods, (PyObject*) self, name);
}
static PyObject*
sp_handle_as_int(sp_handle_object* self)
{
return PyInt_FromLong((long) self->handle);
}
static PyNumberMethods sp_handle_as_number;
statichere PyTypeObject sp_handle_type = {
PyObject_HEAD_INIT(NULL)
0, /*ob_size*/
"_subprocess_handle", sizeof(sp_handle_object), 0,
(destructor) sp_handle_dealloc, /*tp_dealloc*/
0, /*tp_print*/
(getattrfunc) sp_handle_getattr, /*tp_getattr*/
0, /*tp_setattr*/
0, /*tp_compare*/
0, /*tp_repr*/
&sp_handle_as_number, /*tp_as_number */
0, /*tp_as_sequence */
0, /*tp_as_mapping */
0 /*tp_hash*/
};
/* -------------------------------------------------------------------- */
/* windows API functions */
static PyObject *
sp_GetStdHandle(PyObject* self, PyObject* args)
{
HANDLE handle;
int std_handle;
if (!PyArg_ParseTuple(args, "i:GetStdHandle", &std_handle))
return NULL;
Py_BEGIN_ALLOW_THREADS
handle = GetStdHandle((DWORD) 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 PyInt_FromLong((long) handle);
}
static PyObject *
sp_GetCurrentProcess(PyObject* self, PyObject* args)
{
if (!PyArg_ParseTuple(args, ":GetCurrentProcess"))
return NULL;
return sp_handle_new(GetCurrentProcess());
}
static PyObject *
sp_DuplicateHandle(PyObject* self, PyObject* args)
{
HANDLE target_handle;
BOOL result;
long source_process_handle;
long source_handle;
long target_process_handle;
int desired_access;
int inherit_handle;
int options = 0;
if (!PyArg_ParseTuple(args, "lllii|i:DuplicateHandle",
&source_process_handle, &source_handle,
&target_process_handle,
&desired_access, &inherit_handle, &options))
return NULL;
Py_BEGIN_ALLOW_THREADS
result = DuplicateHandle(
(HANDLE) source_process_handle, (HANDLE) source_handle,
(HANDLE) target_process_handle, &target_handle, desired_access,
inherit_handle, options
);
Py_END_ALLOW_THREADS
if (!result)
return PyErr_SetFromWindowsErr(GetLastError());
return sp_handle_new(target_handle);
}
static PyObject *
sp_CreatePipe(PyObject* self, PyObject* args)
{
HANDLE read_pipe;
HANDLE write_pipe;
BOOL result;
PyObject* pipe_attributes; /* ignored */
int size;
if (!PyArg_ParseTuple(args, "Oi: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", sp_handle_new(read_pipe), sp_handle_new(write_pipe)
);
}
/* helpers for createprocess */
static int
getint(PyObject* obj, char* name)
{
PyObject* value;
value = PyObject_GetAttrString(obj, name);
if (!value) {
PyErr_Clear(); /* FIXME: propagate error? */
return 0;
}
return (int) PyInt_AsLong(value);
}
static HANDLE
gethandle(PyObject* obj, char* name)
{
sp_handle_object* value;
value = (sp_handle_object*) PyObject_GetAttrString(obj, name);
if (!value) {
PyErr_Clear(); /* FIXME: propagate error? */
return NULL;
}
if (value->ob_type != &sp_handle_type)
return NULL;
return value->handle;
}
static PyObject*
getenvironment(PyObject* environment)
{
int i, envsize;
PyObject* out = NULL;
PyObject* keys;
PyObject* values;
char* p;
/* 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;
out = PyString_FromStringAndSize(NULL, 2048);
if (!out)
goto error;
p = PyString_AS_STRING(out);
for (i = 0; i < envsize; i++) {
int ksize, vsize, totalsize;
PyObject* key = PyList_GET_ITEM(keys, i);
PyObject* value = PyList_GET_ITEM(values, i);
if (!PyString_Check(key) || !PyString_Check(value)) {
PyErr_SetString(
PyExc_TypeError, "environment can only contain strings"
);
goto error;
}
ksize = PyString_GET_SIZE(key);
vsize = PyString_GET_SIZE(value);
totalsize = (p - PyString_AS_STRING(out)) + ksize + 1 + vsize + 1 + 1;
if (totalsize > PyString_GET_SIZE(out)) {
int offset = p - PyString_AS_STRING(out);
_PyString_Resize(&out, totalsize + 1024);
p = PyString_AS_STRING(out) + offset;
}
memcpy(p, PyString_AS_STRING(key), ksize); p += ksize; *p++ = '=';
memcpy(p, PyString_AS_STRING(value), vsize); p += vsize; *p++ = '\0';
}
/* add trailing null byte */
*p++ = '\0';
_PyString_Resize(&out, p - PyString_AS_STRING(out));
/* PyObject_Print(out, stdout, 0); */
return out;
error:
Py_XDECREF(out);
Py_XDECREF(keys);
Py_XDECREF(values);
return NULL;
}
static PyObject *
sp_CreateProcess(PyObject* self, PyObject* args)
{
BOOL result;
PROCESS_INFORMATION pi;
STARTUPINFO si;
PyObject* environment;
char* application_name;
char* command_line;
PyObject* process_attributes; /* ignored */
PyObject* thread_attributes; /* ignored */
int inherit_handles;
int creation_flags;
PyObject* env_mapping;
char* current_directory;
PyObject* startup_info;
if (!PyArg_ParseTuple(args, "zzOOiiOzO:CreateProcess",
&application_name, &command_line,
&process_attributes, &thread_attributes,
&inherit_handles, &creation_flags,
&env_mapping, ¤t_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 = getint(startup_info, "dwFlags");
si.hStdInput = gethandle(startup_info, "hStdInput");
si.hStdOutput = gethandle(startup_info, "hStdOutput");
si.hStdError = gethandle(startup_info, "hStdError");
if (env_mapping == Py_None)
environment = NULL;
else {
environment = getenvironment(env_mapping);
if (!environment)
return NULL;
}
Py_BEGIN_ALLOW_THREADS
result = CreateProcess(
application_name, command_line, NULL, NULL, inherit_handles,
creation_flags, environment ? PyString_AS_STRING(environment) : NULL,
current_directory, &si, &pi
);
Py_END_ALLOW_THREADS
Py_XDECREF(environment);
if (!result)
return PyErr_SetFromWindowsErr(GetLastError());
return Py_BuildValue(
"NNii", sp_handle_new(pi.hProcess), sp_handle_new(pi.hThread),
pi.dwProcessId, pi.dwThreadId
);
}
static PyObject *
sp_GetExitCodeProcess(PyObject* self, PyObject* args)
{
DWORD exit_code;
BOOL result;
long process;
if (!PyArg_ParseTuple(args, "l:GetExitCodeProcess", &process))
return NULL;
result = GetExitCodeProcess((HANDLE) process, &exit_code);
if (!result)
return PyErr_SetFromWindowsErr(GetLastError());
return PyInt_FromLong(exit_code);
}
static PyObject *
sp_WaitForSingleObject(PyObject* self, PyObject* args)
{
DWORD result;
long handle;
int milliseconds;
if (!PyArg_ParseTuple(args, "li:WaitForSingleObject",
&handle, &milliseconds))
return NULL;
Py_BEGIN_ALLOW_THREADS
result = WaitForSingleObject((HANDLE) handle, (DWORD) milliseconds);
Py_END_ALLOW_THREADS
if (result == WAIT_FAILED)
return PyErr_SetFromWindowsErr(GetLastError());
return PyInt_FromLong((int) result);
}
static PyObject *
sp_GetVersion(PyObject* self, PyObject* args)
{
if (!PyArg_ParseTuple(args, ":GetVersion"))
return NULL;
return PyInt_FromLong((int) GetVersion());
}
static PyObject *
sp_GetModuleFileName(PyObject* self, PyObject* args)
{
BOOL result;
long module;
TCHAR filename[MAX_PATH];
if (!PyArg_ParseTuple(args, "l:GetModuleFileName", &module))
return NULL;
result = GetModuleFileName((HMODULE)module, filename, MAX_PATH);
filename[MAX_PATH-1] = '\0';
if (!result)
return PyErr_SetFromWindowsErr(GetLastError());
return PyString_FromString(filename);
}
static PyMethodDef sp_functions[] = {
{"GetStdHandle", sp_GetStdHandle, METH_VARARGS},
{"GetCurrentProcess", sp_GetCurrentProcess, METH_VARARGS},
{"DuplicateHandle", sp_DuplicateHandle, METH_VARARGS},
{"CreatePipe", sp_CreatePipe, METH_VARARGS},
{"CreateProcess", sp_CreateProcess, METH_VARARGS},
{"GetExitCodeProcess", sp_GetExitCodeProcess, METH_VARARGS},
{"WaitForSingleObject", sp_WaitForSingleObject, METH_VARARGS},
{"GetVersion", sp_GetVersion, METH_VARARGS},
{"GetModuleFileName", sp_GetModuleFileName, METH_VARARGS},
{NULL, NULL}
};
/* -------------------------------------------------------------------- */
static void
defint(PyObject* d, const char* name, int value)
{
PyObject* v = PyInt_FromLong((long) value);
if (v) {
PyDict_SetItemString(d, (char*) name, v);
Py_DECREF(v);
}
}
#if PY_VERSION_HEX >= 0x02030000
PyMODINIT_FUNC
#else
DL_EXPORT(void)
#endif
init_subprocess()
{
PyObject *d;
PyObject *m;
/* patch up object descriptors */
sp_handle_type.ob_type = &PyType_Type;
sp_handle_as_number.nb_int = (unaryfunc) sp_handle_as_int;
m = Py_InitModule("_subprocess", sp_functions);
d = PyModule_GetDict(m);
/* constants */
defint(d, "STD_INPUT_HANDLE", STD_INPUT_HANDLE);
defint(d, "STD_OUTPUT_HANDLE", STD_OUTPUT_HANDLE);
defint(d, "STD_ERROR_HANDLE", STD_ERROR_HANDLE);
defint(d, "DUPLICATE_SAME_ACCESS", DUPLICATE_SAME_ACCESS);
defint(d, "STARTF_USESTDHANDLES", STARTF_USESTDHANDLES);
defint(d, "INFINITE", INFINITE);
defint(d, "WAIT_OBJECT_0", WAIT_OBJECT_0);
defint(d, "CREATE_NEW_CONSOLE", CREATE_NEW_CONSOLE);
}
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