summaryrefslogtreecommitdiff
path: root/src/python-systemd/login.c
blob: 57dc080215bc4379874f2a36d85f580e3f4c39bc (plain)
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
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
/*-*- 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/>.
***/

#define PY_SSIZE_T_CLEAN
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wredundant-decls"
#include <Python.h>
#pragma GCC diagnostic pop

#include "systemd/sd-login.h"
#include "pyutil.h"
#include "util.h"
#include "strv.h"

PyDoc_STRVAR(module__doc__,
             "Python interface to the libsystemd-login library."
);

#define helper(name)                                                    \
static PyObject* name(PyObject *self, PyObject *args) {                 \
        _cleanup_strv_free_ char **list = NULL;                         \
        int r;                                                          \
        PyObject *ans;                                                  \
                                                                        \
        assert(args == NULL);                                           \
                                                                        \
        r = sd_get_##name(&list);                                       \
        if (r < 0) {                                                    \
                errno = -r;                                             \
                return PyErr_SetFromErrno(PyExc_IOError);               \
        }                                                               \
                                                                        \
        ans = PyList_New(r);                                            \
        if (!ans)                                                       \
                return NULL;                                            \
                                                                        \
        for (r--; r >= 0; r--) {                                        \
                PyObject *s = unicode_FromString(list[r]);              \
                if (!s) {                                               \
                        Py_DECREF(ans);                                 \
                        return NULL;                                    \
                }                                                       \
                                                                        \
                PyList_SetItem(ans, r, s);                              \
        }                                                               \
                                                                        \
        return ans;                                                     \
}

helper(seats)
helper(sessions)
helper(machine_names)
#undef helper

static PyObject* uids(PyObject *self, PyObject *args) {
        _cleanup_free_ uid_t *list = NULL;
        int r;
        PyObject *ans;

        assert(args == NULL);

        r = sd_get_uids(&list);
        if (r < 0) {
                errno = -r;
                return PyErr_SetFromErrno(PyExc_IOError);
        }

        ans = PyList_New(r);
        if (!ans)
                return NULL;

        for (r--; r >= 0; r--) {
                PyObject *s = long_FromLong(list[r]);
                if (!s) {
                        Py_DECREF(ans);
                        return NULL;
                }

                PyList_SetItem(ans, r, s);
        }

        return ans;
}

PyDoc_STRVAR(seats__doc__,
             "seats() -> list\n\n"
             "Returns a list of currently available local seats.\n"
             "Wraps sd_get_seats(3)."
);

PyDoc_STRVAR(sessions__doc__,
             "sessions() -> list\n\n"
             "Returns a list of current login sessions.\n"
             "Wraps sd_get_sessions(3)."
);

PyDoc_STRVAR(machine_names__doc__,
             "machine_names() -> list\n\n"
             "Returns a list of currently running virtual machines\n"
             "and containers on the system.\n"
             "Wraps sd_get_machine_names(3)."
);

PyDoc_STRVAR(uids__doc__,
             "uids() -> list\n\n"
             "Returns a list of uids of users who currently have login sessions.\n"
             "Wraps sd_get_uids(3)."
);

static PyMethodDef methods[] = {
        { "seats", seats, METH_NOARGS, seats__doc__},
        { "sessions", sessions, METH_NOARGS, sessions__doc__},
        { "machine_names", machine_names, METH_NOARGS, machine_names__doc__},
        { "uids", uids, METH_NOARGS, uids__doc__},
        {} /* Sentinel */
};


typedef struct {
        PyObject_HEAD
        sd_login_monitor *monitor;
} Monitor;
static PyTypeObject MonitorType;

static void Monitor_dealloc(Monitor* self)
{
    sd_login_monitor_unref(self->monitor);
    Py_TYPE(self)->tp_free((PyObject*)self);
}

PyDoc_STRVAR(Monitor__doc__,
             "Monitor([category]) -> ...\n\n"
             "Monitor may be used to monitor login sessions, users, seats,\n"
             "and virtual machines/containers. Monitor provides a file\n"
             "descriptor which can be integrated in an external event loop.\n"
             "See man:sd_login_monitor_new(3) for the details about what\n"
             "can be monitored.");
static int Monitor_init(Monitor *self, PyObject *args, PyObject *keywds)
{
        const char *category = NULL;
        int r;

        static const char* const kwlist[] = {"category", NULL};
        if (!PyArg_ParseTupleAndKeywords(args, keywds, "|z", (char**) kwlist,
                                         &category))
                return -1;

        Py_BEGIN_ALLOW_THREADS
        r = sd_login_monitor_new(category, &self->monitor);
        Py_END_ALLOW_THREADS

        return set_error(r, NULL, "Invalid category");
}


PyDoc_STRVAR(Monitor_fileno__doc__,
             "fileno() -> int\n\n"
             "Get a file descriptor to poll for events.\n"
             "This method wraps sd_login_monitor_get_fd(3).");
static PyObject* Monitor_fileno(Monitor *self, PyObject *args)
{
        int fd = sd_login_monitor_get_fd(self->monitor);
        set_error(fd, NULL, NULL);
        if (fd < 0)
                return NULL;
        return long_FromLong(fd);
}


PyDoc_STRVAR(Monitor_get_events__doc__,
             "get_events() -> int\n\n"
             "Returns a mask of poll() events to wait for on the file\n"
             "descriptor returned by .fileno().\n\n"
             "See man:sd_login_monitor_get_events(3) for further discussion.");
static PyObject* Monitor_get_events(Monitor *self, PyObject *args)
{
    int r = sd_login_monitor_get_events(self->monitor);
    set_error(r, NULL, NULL);
    if (r < 0)
        return NULL;
    return long_FromLong(r);
}


PyDoc_STRVAR(Monitor_get_timeout__doc__,
             "get_timeout() -> int or None\n\n"
             "Returns a timeout value for usage in poll(), the time since the\n"
             "epoch of clock_gettime(2) in microseconds, or None if no timeout\n"
             "is necessary.\n\n"
             "The return value must be converted to a relative timeout in\n"
             "milliseconds if it is to be used as an argument for poll().\n"
             "See man:sd_login_monitor_get_timeout(3) for further discussion.");
static PyObject* Monitor_get_timeout(Monitor *self, PyObject *args)
{
    int r;
    uint64_t t;

    r = sd_login_monitor_get_timeout(self->monitor, &t);
    set_error(r, NULL, NULL);
    if (r < 0)
        return NULL;

    if (t == (uint64_t) -1)
        Py_RETURN_NONE;

    assert_cc(sizeof(unsigned long long) == sizeof(t));
    return PyLong_FromUnsignedLongLong(t);
}


PyDoc_STRVAR(Monitor_get_timeout_ms__doc__,
             "get_timeout_ms() -> int\n\n"
             "Returns a timeout value suitable for usage in poll(), the value\n"
             "returned by .get_timeout() converted to relative ms, or -1 if\n"
             "no timeout is necessary.");
static PyObject* Monitor_get_timeout_ms(Monitor *self, PyObject *args)
{
    int r;
    uint64_t t;

    r = sd_login_monitor_get_timeout(self->monitor, &t);
    set_error(r, NULL, NULL);
    if (r < 0)
        return NULL;

    return absolute_timeout(t);
}


PyDoc_STRVAR(Monitor_close__doc__,
             "close() -> None\n\n"
             "Free resources allocated by this Monitor object.\n"
             "This method invokes sd_login_monitor_unref().\n"
             "See man:sd_login_monitor_unref(3).");
static PyObject* Monitor_close(Monitor *self, PyObject *args)
{
        assert(self);
        assert(!args);

        sd_login_monitor_unref(self->monitor);
        self->monitor = NULL;
        Py_RETURN_NONE;
}


PyDoc_STRVAR(Monitor_flush__doc__,
             "flush() -> None\n\n"
             "Reset the wakeup state of the monitor object.\n"
             "This method invokes sd_login_monitor_flush().\n"
             "See man:sd_login_monitor_flush(3).");
static PyObject* Monitor_flush(Monitor *self, PyObject *args)
{
        assert(self);
        assert(!args);

        sd_login_monitor_flush(self->monitor);
        Py_RETURN_NONE;
}


PyDoc_STRVAR(Monitor___enter____doc__,
             "__enter__() -> self\n\n"
             "Part of the context manager protocol.\n"
             "Returns self.\n");
static PyObject* Monitor___enter__(PyObject *self, PyObject *args)
{
    assert(self);
    assert(!args);

    Py_INCREF(self);
    return self;
}


PyDoc_STRVAR(Monitor___exit____doc__,
             "__exit__(type, value, traceback) -> None\n\n"
             "Part of the context manager protocol.\n"
             "Closes the monitor..\n");
static PyObject* Monitor___exit__(Monitor *self, PyObject *args)
{
        return Monitor_close(self, args);
}


static PyMethodDef Monitor_methods[] = {
    {"fileno",          (PyCFunction) Monitor_fileno, METH_NOARGS, Monitor_fileno__doc__},
    {"get_events",      (PyCFunction) Monitor_get_events, METH_NOARGS, Monitor_get_events__doc__},
    {"get_timeout",     (PyCFunction) Monitor_get_timeout, METH_NOARGS, Monitor_get_timeout__doc__},
    {"get_timeout_ms",  (PyCFunction) Monitor_get_timeout_ms, METH_NOARGS, Monitor_get_timeout_ms__doc__},
    {"close",           (PyCFunction) Monitor_close, METH_NOARGS, Monitor_close__doc__},
    {"flush",           (PyCFunction) Monitor_flush, METH_NOARGS, Monitor_flush__doc__},
    {"__enter__",       (PyCFunction) Monitor___enter__, METH_NOARGS, Monitor___enter____doc__},
    {"__exit__",        (PyCFunction) Monitor___exit__, METH_VARARGS, Monitor___exit____doc__},
    {}  /* Sentinel */
};

static PyTypeObject MonitorType = {
    PyVarObject_HEAD_INIT(NULL, 0)
    .tp_name = "login.Monitor",
    .tp_basicsize = sizeof(Monitor),
    .tp_dealloc = (destructor) Monitor_dealloc,
    .tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
    .tp_doc = Monitor__doc__,
    .tp_methods = Monitor_methods,
    .tp_init = (initproc) Monitor_init,
    .tp_new = PyType_GenericNew,
};


#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wmissing-prototypes"

#if PY_MAJOR_VERSION < 3

PyMODINIT_FUNC initlogin(void) {
        PyObject *m;

        if (PyType_Ready(&MonitorType) < 0)
                return;

        m = Py_InitModule3("login", methods, module__doc__);
        if (m == NULL)
                return;

        PyModule_AddStringConstant(m, "__version__", PACKAGE_VERSION);

        Py_INCREF(&MonitorType);
        PyModule_AddObject(m, "Monitor", (PyObject *) &MonitorType);
}
#else

static struct PyModuleDef module = {
        PyModuleDef_HEAD_INIT,
        "login", /* name of module */
        module__doc__, /* module documentation, may be NULL */
        -1, /* size of per-interpreter state of the module */
        methods
};

PyMODINIT_FUNC PyInit_login(void) {
        PyObject *m;

        if (PyType_Ready(&MonitorType) < 0)
                return NULL;

        m = PyModule_Create(&module);
        if (m == NULL)
                return NULL;

        if (PyModule_AddStringConstant(m, "__version__", PACKAGE_VERSION)) {
                Py_DECREF(m);
                return NULL;
        }

        Py_INCREF(&MonitorType);
        if (PyModule_AddObject(m, "Monitor", (PyObject *) &MonitorType)) {
                Py_DECREF(&MonitorType);
                Py_DECREF(m);
                return NULL;
        }

        return m;
}

#endif

#pragma GCC diagnostic pop