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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
Copyright 2013 Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>
python-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.
python-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 python-systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <Python.h>
/* Our include is first, so that our defines are replaced by the ones
* from the system header. If the system header has the same definitions
* (or does not have them at all), this replacement is silent. If the
* system header has a different definition, we get a warning. A warning
* means that the system headers changed incompatibly, and we should update
* our definition.
*/
#include "id128-defines.h"
#include <systemd/sd-messages.h>
#include "pyutil.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_machine_app_specific__doc__,
"get_machine_app_specific(UUID) -> UUID\n\n"
"Return a 128-bit unique identifier for this application and machine.\n"
"Wraps sd_id128_get_machine_app_specific(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); \
\
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 PyObject *get_machine_app_specific(PyObject *self, PyObject *args) {
sd_id128_t app_id, machine_id;
int r;
Py_buffer buffer;
_cleanup_Py_DECREF_ PyObject
*uuid = NULL, *uuid_bytes = NULL;
uuid_bytes = PyObject_GetAttrString(args, "bytes");
if (!uuid_bytes)
return NULL;
r = PyObject_GetBuffer(uuid_bytes, &buffer, 0);
if (r == -1)
return NULL;
if (buffer.len != sizeof(app_id.bytes)) {
PyBuffer_Release(&buffer);
return NULL;
}
memcpy(app_id.bytes, buffer.buf, sizeof(app_id.bytes));
PyBuffer_Release(&buffer);
r = sd_id128_get_machine_app_specific(app_id, &machine_id);
if (r < 0) {
errno = -r;
return PyErr_SetFromErrno(PyExc_IOError);
}
return make_uuid(machine_id);
}
static PyMethodDef methods[] = {
{ "randomize", randomize, METH_NOARGS, randomize__doc__},
{ "get_machine", get_machine, METH_NOARGS, get_machine__doc__},
{ "get_machine_app_specific", get_machine_app_specific, METH_O, get_machine_app_specific__doc__},
{ "get_boot", get_boot, METH_NOARGS, get_boot__doc__},
{} /* 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)
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,
.m_name = "id128", /* name of module */
.m_doc = module__doc__, /* module documentation */
.m_size = -1, /* size of per-interpreter state of the module */
.m_methods = methods,
};
DISABLE_WARNING_MISSING_PROTOTYPES;
PyMODINIT_FUNC PyInit_id128(void) {
PyObject *m;
m = PyModule_Create(&module);
if (!m)
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
|
