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cffda82e209efd3e679e2242e7d27e01b463e77c
sudo/plugins/python/python_plugin_common.c
Robert Manner c039a99c10 plugins/python/sudo_module: add sudo.LogHandler 
so python log system can be used with sudo logsystem.
Loggers use it by default (the handler is set on the root logger).
If that is not the intent, it can be overridden explicitly.
2020-02-28 05:46:54 -07:00

735 lines
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/*
* SPDX-License-Identifier: ISC
*
* Copyright (c) 2019 Robert Manner <robert.manner@oneidentity.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, 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.
*/
/*
* This is an open source non-commercial project. Dear PVS-Studio, please check it.
* PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
*/
#include "python_plugin_common.h"
#include "sudo_python_module.h"
#include "sudo_queue.h"
#include "sudo_conf.h"
#include <limits.h>
#include <string.h>
static struct _inittab * python_inittab_copy = NULL;
static size_t python_inittab_copy_len = 0;
#ifndef PLUGIN_DIR
#define PLUGIN_DIR ""
#endif
const char *
_lookup_value(char * const keyvalues[], const char *key)
{
debug_decl(_lookup_value, PYTHON_DEBUG_INTERNAL);
if (keyvalues == NULL)
debug_return_const_str(NULL);
size_t keylen = strlen(key);
for (; *keyvalues != NULL; ++keyvalues) {
const char *keyvalue = *keyvalues;
if (strncmp(keyvalue, key, keylen) == 0 && keyvalue[keylen] == '=')
debug_return_const_str(keyvalue + keylen + 1);
}
debug_return_const_str(NULL);
}
CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION
int
_append_python_path(const char *module_dir)
{
debug_decl(_py_debug_python_function, PYTHON_DEBUG_PLUGIN_LOAD);
int rc = -1;
PyObject *py_sys_path = PySys_GetObject("path");
if (py_sys_path == NULL) {
PyErr_Format(sudo_exc_SudoException, "Failed to get python 'path'");
debug_return_int(rc);
}
sudo_debug_printf(SUDO_DEBUG_DIAG, "Extending python 'path' with '%s'\n", module_dir);
PyObject *py_module_dir = PyUnicode_FromString(module_dir);
if (py_module_dir == NULL || PyList_Append(py_sys_path, py_module_dir) != 0) {
Py_XDECREF(py_module_dir);
debug_return_int(rc);
}
Py_XDECREF(py_module_dir);
if (sudo_debug_needed(SUDO_DEBUG_INFO)) {
char *path = py_join_str_list(py_sys_path, ":");
sudo_debug_printf(SUDO_DEBUG_INFO, "Python path became: %s\n", path);
free(path);
}
rc = 0;
debug_return_int(rc);
}
static PyObject *
_import_module(const char *path)
{
debug_decl(_import_module, PYTHON_DEBUG_PLUGIN_LOAD);
sudo_debug_printf(SUDO_DEBUG_DIAG, "importing module: %s\n", path);
char path_copy[PATH_MAX];
if (strlcpy(path_copy, path, sizeof(path_copy)) >= sizeof(path_copy))
debug_return_ptr(NULL);
char *module_dir = path_copy;
char *module_name = strrchr(path_copy, '/');
if (module_name == NULL) {
module_name = path_copy;
module_dir = "";
} else {
*module_name++ = '\0';
}
size_t len = strlen(module_name);
if (len >= 3 && strcmp(".py", module_name + len - 3) == 0)
module_name[len - 3] = '\0';
sudo_debug_printf(SUDO_DEBUG_INFO, "module_name: '%s', module_dir: '%s'\n", module_name, module_dir);
if (_append_python_path(module_dir) < 0)
debug_return_ptr(NULL);
debug_return_ptr(PyImport_ImportModule(module_name));
}
static PyThreadState *
_python_plugin_new_interpreter(void)
{
debug_decl(_python_plugin_new_interpreter, PYTHON_DEBUG_INTERNAL);
if (py_ctx.interpreter_count >= INTERPRETER_MAX) {
PyErr_Format(PyExc_Exception, "Too many interpreters");
debug_return_ptr(NULL);
}
PyThreadState *py_interpreter = Py_NewInterpreter();
if (py_interpreter != NULL) {
py_ctx.py_subinterpreters[py_ctx.interpreter_count] = py_interpreter;
++py_ctx.interpreter_count;
}
debug_return_ptr(py_interpreter);
}
static int
_save_inittab(void)
{
debug_decl(_save_inittab, PYTHON_DEBUG_INTERNAL);
free(python_inittab_copy); // just to be sure (it is always NULL)
for (python_inittab_copy_len = 0;
PyImport_Inittab[python_inittab_copy_len].name != NULL;
++python_inittab_copy_len) {
}
++python_inittab_copy_len; // for the null mark
python_inittab_copy = malloc(sizeof(struct _inittab) * python_inittab_copy_len);
if (python_inittab_copy == NULL) {
debug_return_int(SUDO_RC_ERROR);
}
memcpy(python_inittab_copy, PyImport_Inittab, python_inittab_copy_len * sizeof(struct _inittab));
debug_return_int(SUDO_RC_OK);
}
static void
_restore_inittab(void)
{
debug_decl(_restore_inittab, PYTHON_DEBUG_INTERNAL);
if (python_inittab_copy != NULL)
memcpy(PyImport_Inittab, python_inittab_copy, python_inittab_copy_len * sizeof(struct _inittab));
free(python_inittab_copy);
python_inittab_copy = NULL;
python_inittab_copy_len = 0;
debug_return;
}
void
python_plugin_handle_plugin_error_exception(PyObject **py_result, struct PluginContext *plugin_ctx)
{
debug_decl(python_plugin_handle_plugin_error_exception, PYTHON_DEBUG_INTERNAL);
free(plugin_ctx->callback_error);
plugin_ctx->callback_error = NULL;
if (PyErr_Occurred()) {
int rc = SUDO_RC_ERROR;
if (PyErr_ExceptionMatches(sudo_exc_PluginReject)) {
rc = SUDO_RC_REJECT;
} else if (!PyErr_ExceptionMatches(sudo_exc_PluginError)) {
debug_return;
}
if (py_result != NULL) {
Py_CLEAR(*py_result);
*py_result = PyLong_FromLong(rc);
}
PyObject *py_type = NULL, *py_message = NULL, *py_traceback = NULL;
PyErr_Fetch(&py_type, &py_message, &py_traceback);
char *message = py_message ? py_create_string_rep(py_message) : NULL;
sudo_debug_printf(SUDO_DEBUG_INFO, "received sudo.PluginError exception with message '%s'",
message == NULL ? "(null)" : message);
plugin_ctx->callback_error = message;
Py_CLEAR(py_type);
Py_CLEAR(py_message);
Py_CLEAR(py_traceback);
}
debug_return;
}
int
python_plugin_construct_custom(struct PluginContext *plugin_ctx, PyObject *py_kwargs)
{
debug_decl(python_plugin_construct_custom, PYTHON_DEBUG_PLUGIN_LOAD);
int rc = SUDO_RC_ERROR;
PyObject *py_args = PyTuple_New(0);
if (py_args == NULL)
goto cleanup;
py_debug_python_call(python_plugin_name(plugin_ctx), "__init__",
py_args, py_kwargs, PYTHON_DEBUG_PY_CALLS);
plugin_ctx->py_instance = PyObject_Call(plugin_ctx->py_class, py_args, py_kwargs);
python_plugin_handle_plugin_error_exception(NULL, plugin_ctx);
py_debug_python_result(python_plugin_name(plugin_ctx), "__init__",
plugin_ctx->py_instance, PYTHON_DEBUG_PY_CALLS);
if (plugin_ctx->py_instance)
rc = SUDO_RC_OK;
cleanup:
if (PyErr_Occurred()) {
py_log_last_error("Failed to construct plugin instance");
Py_CLEAR(plugin_ctx->py_instance);
rc = SUDO_RC_ERROR;
}
Py_XDECREF(py_args);
debug_return_int(rc);
}
PyObject *
python_plugin_construct_args(unsigned int version,
char *const settings[], char *const user_info[],
char *const user_env[], char *const plugin_options[])
{
PyObject *py_settings = NULL;
PyObject *py_user_info = NULL;
PyObject *py_user_env = NULL;
PyObject *py_plugin_options = NULL;
PyObject *py_version = NULL;
PyObject *py_kwargs = NULL;
if ((py_settings = py_str_array_to_tuple(settings)) == NULL ||
(py_user_info = py_str_array_to_tuple(user_info)) == NULL ||
(py_user_env = py_str_array_to_tuple(user_env)) == NULL ||
(py_plugin_options = py_str_array_to_tuple(plugin_options)) == NULL ||
(py_version = py_create_version(version)) == NULL ||
(py_kwargs = PyDict_New()) == NULL ||
PyDict_SetItemString(py_kwargs, "version", py_version) != 0 ||
PyDict_SetItemString(py_kwargs, "settings", py_settings) != 0 ||
PyDict_SetItemString(py_kwargs, "user_env", py_user_env) != 0 ||
PyDict_SetItemString(py_kwargs, "user_info", py_user_info) != 0 ||
PyDict_SetItemString(py_kwargs, "plugin_options", py_plugin_options) != 0)
{
Py_CLEAR(py_kwargs);
}
Py_CLEAR(py_settings);
Py_CLEAR(py_user_info);
Py_CLEAR(py_user_env);
Py_CLEAR(py_plugin_options);
Py_CLEAR(py_version);
return py_kwargs;
}
int
python_plugin_construct(struct PluginContext *plugin_ctx, unsigned int version,
char *const settings[], char *const user_info[],
char *const user_env[], char *const plugin_options[])
{
debug_decl(python_plugin_construct, PYTHON_DEBUG_PLUGIN_LOAD);
int rc = SUDO_RC_ERROR;
PyObject *py_kwargs = python_plugin_construct_args(
version, settings, user_info, user_env, plugin_options);
if (py_kwargs == NULL) {
py_log_last_error("Failed to construct plugin instance");
rc = SUDO_RC_ERROR;
} else {
rc = python_plugin_construct_custom(plugin_ctx, py_kwargs);
}
Py_CLEAR(py_kwargs);
debug_return_int(rc);
}
int
python_plugin_register_logging(sudo_conv_t conversation,
sudo_printf_t sudo_printf,
char * const settings[])
{
debug_decl(python_plugin_register_logging, PYTHON_DEBUG_INTERNAL);
int rc = SUDO_RC_ERROR;
if (conversation != NULL)
py_ctx.sudo_conv = conversation;
if (sudo_printf)
py_ctx.sudo_log = sudo_printf;
struct sudo_conf_debug_file_list debug_files = TAILQ_HEAD_INITIALIZER(debug_files);
struct sudo_conf_debug_file_list *debug_files_ptr = &debug_files;
const char *plugin_path = _lookup_value(settings, "plugin_path");
if (plugin_path == NULL)
plugin_path = "python_plugin.so";
const char *debug_flags = _lookup_value(settings, "debug_flags");
if (debug_flags == NULL) { // the group plugin does not have this information, so try to look it up
debug_files_ptr = sudo_conf_debug_files(plugin_path);
} else {
if (!python_debug_parse_flags(&debug_files, debug_flags))
goto cleanup;
}
if (debug_files_ptr != NULL) {
if (!python_debug_register(plugin_path, debug_files_ptr))
goto cleanup;
}
rc = SUDO_RC_OK;
cleanup:
debug_return_int(rc);
}
CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION
static int
_python_plugin_register_plugin_in_py_ctx(void)
{
debug_decl(_python_plugin_register_plugin_in_py_ctx, PYTHON_DEBUG_PLUGIN_LOAD);
if (!Py_IsInitialized()) {
// Disable environment variables effecting the python interpreter
// This is important since we are running code here as root, the
// user should not be able to alter what is running any how.
Py_IgnoreEnvironmentFlag = 1;
Py_IsolatedFlag = 1;
Py_NoUserSiteDirectory = 1;
if (_save_inittab() != SUDO_RC_OK)
debug_return_int(SUDO_RC_ERROR);
PyImport_AppendInittab("sudo", sudo_module_init);
Py_InitializeEx(0);
py_ctx.py_main_interpreter = PyThreadState_Get();
// This ensures we import "sudo" module in the main interpreter,
// each subinterpreter will have a shallow copy.
// (This makes the C sudo module able to eg. import other modules.)
PyObject *py_sudo = NULL;
if ((py_sudo = PyImport_ImportModule("sudo")) == NULL) {
debug_return_int(SUDO_RC_ERROR);
}
Py_CLEAR(py_sudo);
} else {
PyThreadState_Swap(py_ctx.py_main_interpreter);
}
debug_return_int(SUDO_RC_OK);
}
int
_python_plugin_set_path(struct PluginContext *plugin_ctx, const char *path)
{
if (path == NULL) {
py_sudo_log(SUDO_CONV_ERROR_MSG, "No python module path is specified. "
"Use 'ModulePath' plugin config option in 'sudo.conf'\n");
return SUDO_RC_ERROR;
}
if (*path == '/') { // absolute path
plugin_ctx->plugin_path = strdup(path);
} else {
if (asprintf(&plugin_ctx->plugin_path, PLUGIN_DIR "/python/%s", path) < 0)
plugin_ctx->plugin_path = NULL;
}
if (plugin_ctx->plugin_path == NULL) {
py_sudo_log(SUDO_CONV_ERROR_MSG, "Failed to allocate memory");
return SUDO_RC_ERROR;
}
return SUDO_RC_OK;
}
/* Returns the list of sudo.Plugins in a module */
static PyObject *
_python_plugin_class_list(PyObject *py_module) {
PyObject *py_module_dict = PyModule_GetDict(py_module); // Note: borrowed
PyObject *key, *value; // Note: borrowed
Py_ssize_t pos = 0;
PyObject *py_plugin_list = PyList_New(0);
while (PyDict_Next(py_module_dict, &pos, &key, &value)) {
if (PyObject_IsSubclass(value, (PyObject *)sudo_type_Plugin) == 1) {
if (PyList_Append(py_plugin_list, key) != 0)
goto cleanup;
} else {
PyErr_Clear();
}
}
cleanup:
if (PyErr_Occurred()) {
Py_CLEAR(py_plugin_list);
}
return py_plugin_list;
}
/* Gets a sudo.Plugin class from the specified module. The argument "plugin_class"
* can be NULL in which case it loads the one and only "sudo.Plugin" present
* in the module (if so), or displays helpful error message. */
static PyObject *
_python_plugin_get_class(const char *plugin_path, PyObject *py_module, const char *plugin_class)
{
debug_decl(python_plugin_init, PYTHON_DEBUG_PLUGIN_LOAD);
PyObject *py_plugin_list = NULL, *py_class = NULL;
if (plugin_class == NULL) {
py_plugin_list = _python_plugin_class_list(py_module);
if (py_plugin_list == NULL) {
goto cleanup;
}
if (PyList_Size(py_plugin_list) == 1) {
PyObject *py_plugin_name = PyList_GetItem(py_plugin_list, 0); // Note: borrowed
plugin_class = PyUnicode_AsUTF8(py_plugin_name);
}
}
if (plugin_class == NULL) {
py_sudo_log(SUDO_CONV_ERROR_MSG, "No plugin class is specified for python module '%s'. "
"Use 'ClassName' configuration option in 'sudo.conf'\n", plugin_path);
if (py_plugin_list != NULL) {
char *possible_plugins = py_join_str_list(py_plugin_list, ", ");
if (possible_plugins != NULL) {
py_sudo_log(SUDO_CONV_ERROR_MSG, "Possible plugins: %s\n", possible_plugins);
free(possible_plugins);
}
}
goto cleanup;
}
sudo_debug_printf(SUDO_DEBUG_DEBUG, "Using plugin class '%s'", plugin_class);
py_class = PyObject_GetAttrString(py_module, plugin_class);
if (py_class == NULL) {
py_sudo_log(SUDO_CONV_ERROR_MSG, "Failed to find plugin class '%s'\n", plugin_class);
goto cleanup;
}
if (!PyObject_IsSubclass(py_class, (PyObject *)sudo_type_Plugin)) {
py_sudo_log(SUDO_CONV_ERROR_MSG, "Plugin class '%s' does not inherit from 'sudo.Plugin'\n", plugin_class);
Py_CLEAR(py_class);
goto cleanup;
}
cleanup:
Py_CLEAR(py_plugin_list);
debug_return_ptr(py_class);
}
int
python_plugin_init(struct PluginContext *plugin_ctx, char * const plugin_options[],
unsigned int version)
{
debug_decl(python_plugin_init, PYTHON_DEBUG_PLUGIN_LOAD);
int rc = SUDO_RC_ERROR;
if (_python_plugin_register_plugin_in_py_ctx() != SUDO_RC_OK)
goto cleanup;
plugin_ctx->sudo_api_version = version;
plugin_ctx->py_interpreter = _python_plugin_new_interpreter();
if (plugin_ctx->py_interpreter == NULL) {
goto cleanup;
}
PyThreadState_Swap(plugin_ctx->py_interpreter);
if (!sudo_conf_developer_mode() && sudo_module_register_importblocker() < 0) {
goto cleanup;
}
if (sudo_module_set_default_loghandler() < 0)
goto cleanup;
if (_python_plugin_set_path(plugin_ctx, _lookup_value(plugin_options, "ModulePath")) != SUDO_RC_OK) {
goto cleanup;
}
sudo_debug_printf(SUDO_DEBUG_DEBUG, "Loading python module from path '%s'", plugin_ctx->plugin_path);
plugin_ctx->py_module = _import_module(plugin_ctx->plugin_path);
if (plugin_ctx->py_module == NULL) {
goto cleanup;
}
plugin_ctx->py_class = _python_plugin_get_class(plugin_ctx->plugin_path, plugin_ctx->py_module,
_lookup_value(plugin_options, "ClassName"));
if (plugin_ctx->py_class == NULL) {
goto cleanup;
}
rc = SUDO_RC_OK;
cleanup:
if (plugin_ctx->py_class == NULL) {
py_log_last_error("Failed during loading plugin class");
rc = SUDO_RC_ERROR;
}
debug_return_int(rc);
}
void
python_plugin_deinit(struct PluginContext *plugin_ctx)
{
debug_decl(python_plugin_deinit, PYTHON_DEBUG_PLUGIN_LOAD);
sudo_debug_printf(SUDO_DEBUG_DIAG, "Deinit was called for a python plugin\n");
Py_CLEAR(plugin_ctx->py_instance);
Py_CLEAR(plugin_ctx->py_class);
Py_CLEAR(plugin_ctx->py_module);
// Note: we are preserving the interpreters here until the unlink because
// of bugs like (strptime does not work after python interpreter reinit):
// https://bugs.python.org/issue27400
// These potentially effect a lot more python functions, simply because
// it is a rare tested scenario.
free(plugin_ctx->callback_error);
free(plugin_ctx->plugin_path);
memset(plugin_ctx, 0, sizeof(*plugin_ctx));
python_debug_deregister();
debug_return;
}
PyObject *
python_plugin_api_call(struct PluginContext *plugin_ctx, const char *func_name, PyObject *py_args)
{
debug_decl(python_plugin_api_call, PYTHON_DEBUG_PY_CALLS);
// Note: call fails if py_args is an empty tuple. Passing no arguments works passing NULL
// instead. So having such must be handled as valid. (See policy_plugin.validate())
if (py_args == NULL && PyErr_Occurred()) {
py_sudo_log(SUDO_CONV_ERROR_MSG, "Failed to build arguments for python plugin API call '%s'\n", func_name);
py_log_last_error(NULL);
debug_return_ptr(NULL);
}
PyObject *py_callable = NULL;
py_callable = PyObject_GetAttrString(plugin_ctx->py_instance, func_name);
if (py_callable == NULL) {
Py_CLEAR(py_args);
debug_return_ptr(NULL);
}
py_debug_python_call(python_plugin_name(plugin_ctx), func_name,
py_args, NULL, PYTHON_DEBUG_PY_CALLS);
PyObject *py_result = PyObject_CallObject(py_callable, py_args);
Py_CLEAR(py_args);
Py_CLEAR(py_callable);
py_debug_python_result(python_plugin_name(plugin_ctx), func_name,
py_result, PYTHON_DEBUG_PY_CALLS);
python_plugin_handle_plugin_error_exception(&py_result, plugin_ctx);
if (PyErr_Occurred()) {
py_log_last_error(NULL);
}
debug_return_ptr(py_result);
}
int
python_plugin_rc_to_int(PyObject *py_result)
{
debug_decl(python_plugin_rc_to_int, PYTHON_DEBUG_PY_CALLS);
if (py_result == NULL)
debug_return_int(SUDO_RC_ERROR);
if (py_result == Py_None)
debug_return_int(SUDO_RC_OK);
debug_return_int((int)PyLong_AsLong(py_result));
}
int
python_plugin_api_rc_call(struct PluginContext *plugin_ctx, const char *func_name, PyObject *py_args)
{
debug_decl(python_plugin_api_rc_call, PYTHON_DEBUG_PY_CALLS);
PyObject *py_result = python_plugin_api_call(plugin_ctx, func_name, py_args);
int rc = python_plugin_rc_to_int(py_result);
Py_XDECREF(py_result);
debug_return_int(rc);
}
int
python_plugin_show_version(struct PluginContext *plugin_ctx, const char *python_callback_name,
int is_verbose, unsigned int plugin_api_version, const char *plugin_api_name)
{
debug_decl(python_plugin_show_version, PYTHON_DEBUG_CALLBACKS);
if (is_verbose) {
py_sudo_log(SUDO_CONV_INFO_MSG, "Python %s plugin (API %d.%d): %s (loaded from '%s')\n",
plugin_api_name,
SUDO_API_VERSION_GET_MAJOR(plugin_api_version),
SUDO_API_VERSION_GET_MINOR(plugin_api_version),
python_plugin_name(plugin_ctx),
plugin_ctx->plugin_path);
}
int rc = SUDO_RC_OK;
if (PyObject_HasAttrString(plugin_ctx->py_instance, python_callback_name)) {
rc = python_plugin_api_rc_call(plugin_ctx, python_callback_name,
Py_BuildValue("(i)", is_verbose));
}
debug_return_int(rc);
}
void
python_plugin_close(struct PluginContext *plugin_ctx, const char *callback_name,
PyObject *py_args)
{
debug_decl(python_plugin_close, PYTHON_DEBUG_CALLBACKS);
PyThreadState_Swap(plugin_ctx->py_interpreter);
// Note, this should handle the case when init has failed
if (plugin_ctx->py_instance != NULL) {
if (!plugin_ctx->call_close) {
sudo_debug_printf(SUDO_DEBUG_INFO, "Skipping close call, because there was no command run\n");
} else if (!PyObject_HasAttrString(plugin_ctx->py_instance, callback_name)) {
sudo_debug_printf(SUDO_DEBUG_INFO, "Python plugin function 'close' is skipped (not present)\n");
} else {
PyObject *py_result = python_plugin_api_call(plugin_ctx, callback_name, py_args);
py_args = NULL; // api call already freed it
Py_XDECREF(py_result);
}
}
Py_CLEAR(py_args);
if (PyErr_Occurred()) {
py_log_last_error(NULL);
}
python_plugin_deinit(plugin_ctx);
debug_return;
}
void
python_plugin_mark_callback_optional(struct PluginContext *plugin_ctx,
const char *function_name, void **function)
{
if (!PyObject_HasAttrString(plugin_ctx->py_instance, function_name)) {
debug_decl_vars(python_plugin_mark_callback_optional, PYTHON_DEBUG_PY_CALLS);
sudo_debug_printf(SUDO_DEBUG_INFO, "%s function '%s' is not implemented\n",
Py_TYPENAME(plugin_ctx->py_instance), function_name);
*function = NULL;
}
}
const char *
python_plugin_name(struct PluginContext *plugin_ctx)
{
debug_decl(python_plugin_name, PYTHON_DEBUG_INTERNAL);
const char *name = "(NULL)";
if (plugin_ctx == NULL || !PyType_Check(plugin_ctx->py_class))
debug_return_const_str(name);
debug_return_const_str(((PyTypeObject *)(plugin_ctx->py_class))->tp_name);
}
void python_plugin_unlink(void) __attribute__((destructor));
// this gets run only when sudo unlinks the python_plugin.so
void
python_plugin_unlink(void)
{
debug_decl(python_plugin_unlink, PYTHON_DEBUG_INTERNAL);
if (py_ctx.py_main_interpreter == NULL)
return;
if (Py_IsInitialized()) {
sudo_debug_printf(SUDO_DEBUG_NOTICE, "Closing: deinit python %lu subinterpreters\n",
py_ctx.interpreter_count);
for (size_t i = 0; i < py_ctx.interpreter_count; ++i) {
PyThreadState *py_interpreter = py_ctx.py_subinterpreters[i];
PyThreadState_Swap(py_interpreter);
Py_EndInterpreter(py_interpreter);
}
sudo_debug_printf(SUDO_DEBUG_NOTICE, "Closing: deinit main interpreter\n");
// we need to call finalize from the main interpreter
PyThreadState_Swap(py_ctx.py_main_interpreter);
if (Py_FinalizeEx() != 0) {
sudo_debug_printf(SUDO_DEBUG_WARN, "Closing: failed to deinit python interpreter\n");
}
// Restore inittab so "sudo" module does not remain there (as garbage)
_restore_inittab();
}
py_ctx_reset();
debug_return;
}
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