/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** This file is part of systemd. Copyright 2013 Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl> systemd is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. systemd is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include <Python.h> #include "systemd/sd-messages.h" #include "pyutil.h" #include "log.h" #include "util.h" #include "macro.h" PyDoc_STRVAR(module__doc__, "Python interface to the libsystemd-id128 library.\n\n" "Provides SD_MESSAGE_* constants and functions to query and generate\n" "128-bit unique identifiers." ); PyDoc_STRVAR(randomize__doc__, "randomize() -> UUID\n\n" "Return a new random 128-bit unique identifier.\n" "Wraps sd_id128_randomize(3)." ); PyDoc_STRVAR(get_machine__doc__, "get_machine() -> UUID\n\n" "Return a 128-bit unique identifier for this machine.\n" "Wraps sd_id128_get_machine(3)." ); PyDoc_STRVAR(get_boot__doc__, "get_boot() -> UUID\n\n" "Return a 128-bit unique identifier for this boot.\n" "Wraps sd_id128_get_boot(3)." ); static PyObject* make_uuid(sd_id128_t id) { _cleanup_Py_DECREF_ PyObject *uuid = NULL, *UUID = NULL, *bytes = NULL, *args = NULL, *kwargs = NULL; uuid = PyImport_ImportModule("uuid"); if (!uuid) return NULL; UUID = PyObject_GetAttrString(uuid, "UUID"); bytes = PyBytes_FromStringAndSize((const char*) &id.bytes, sizeof(id.bytes)); args = Py_BuildValue("()"); kwargs = PyDict_New(); if (!UUID || !bytes || !args || !kwargs) return NULL; if (PyDict_SetItemString(kwargs, "bytes", bytes) < 0) return NULL; return PyObject_Call(UUID, args, kwargs); } #define helper(name) \ static PyObject *name(PyObject *self, PyObject *args) { \ sd_id128_t id; \ int r; \ \ assert(args == NULL); \ \ r = sd_id128_##name(&id); \ if (r < 0) { \ errno = -r; \ return PyErr_SetFromErrno(PyExc_IOError); \ } \ \ return make_uuid(id); \ } helper(randomize) helper(get_machine) helper(get_boot) static PyMethodDef methods[] = { { "randomize", randomize, METH_NOARGS, randomize__doc__}, { "get_machine", get_machine, METH_NOARGS, get_machine__doc__}, { "get_boot", get_boot, METH_NOARGS, get_boot__doc__}, { NULL, NULL, 0, NULL } /* Sentinel */ }; static int add_id(PyObject *module, const char* name, sd_id128_t id) { PyObject *obj; obj = make_uuid(id); if (!obj) return -1; return PyModule_AddObject(module, name, obj); } #if PY_MAJOR_VERSION < 3 DISABLE_WARNING_MISSING_PROTOTYPES; PyMODINIT_FUNC initid128(void) { PyObject *m; m = Py_InitModule3("id128", methods, module__doc__); if (m == NULL) return; /* a series of lines like 'add_id() ;' follow */ #define JOINER ; #include "id128-constants.h" #undef JOINER PyModule_AddStringConstant(m, "__version__", PACKAGE_VERSION); } REENABLE_WARNING; #else static struct PyModuleDef module = { PyModuleDef_HEAD_INIT, "id128", /* name of module */ module__doc__, /* module documentation, may be NULL */ -1, /* size of per-interpreter state of the module */ methods }; DISABLE_WARNING_MISSING_PROTOTYPES; PyMODINIT_FUNC PyInit_id128(void) { PyObject *m; m = PyModule_Create(&module); if (m == NULL) return NULL; if ( /* a series of lines like 'add_id() ||' follow */ #define JOINER || #include "id128-constants.h" #undef JOINER PyModule_AddStringConstant(m, "__version__", PACKAGE_VERSION)) { Py_DECREF(m); return NULL; } return m; } REENABLE_WARNING; #endif