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ea430986 LP |
1 | /*-*- Mode: C; c-basic-offset: 8 -*-*/ |
2 | ||
a7334b09 LP |
3 | /*** |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
ea430986 LP |
22 | #include <errno.h> |
23 | ||
24 | #include "dbus.h" | |
25 | #include "log.h" | |
4139c1b2 | 26 | #include "dbus-unit.h" |
ea430986 | 27 | |
4139c1b2 LP |
28 | int bus_unit_append_names(Manager *m, DBusMessageIter *i, const char *property, void *data) { |
29 | char *t; | |
30 | Iterator j; | |
31 | DBusMessageIter sub; | |
32 | Unit *u = data; | |
33 | ||
34 | if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "s", &sub)) | |
35 | return -ENOMEM; | |
36 | ||
37 | SET_FOREACH(t, u->meta.names, j) | |
38 | if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &t)) | |
39 | return -ENOMEM; | |
40 | ||
41 | if (!dbus_message_iter_close_container(i, &sub)) | |
42 | return -ENOMEM; | |
43 | ||
44 | return 0; | |
45 | } | |
46 | ||
47 | int bus_unit_append_description(Manager *m, DBusMessageIter *i, const char *property, void *data) { | |
ea430986 LP |
48 | Unit *u = data; |
49 | const char *d; | |
50 | ||
51 | assert(m); | |
52 | assert(i); | |
53 | assert(property); | |
54 | assert(u); | |
55 | ||
56 | d = unit_description(u); | |
57 | ||
58 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &d)) | |
59 | return -ENOMEM; | |
60 | ||
61 | return 0; | |
62 | } | |
63 | ||
6f4706b7 | 64 | DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_unit_append_load_state, unit_load_state, UnitLoadState); |
ea430986 | 65 | |
4139c1b2 | 66 | int bus_unit_append_active_state(Manager *m, DBusMessageIter *i, const char *property, void *data) { |
ea430986 LP |
67 | Unit *u = data; |
68 | const char *state; | |
69 | ||
70 | assert(m); | |
71 | assert(i); | |
72 | assert(property); | |
73 | assert(u); | |
74 | ||
75 | state = unit_active_state_to_string(unit_active_state(u)); | |
76 | ||
77 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &state)) | |
78 | return -ENOMEM; | |
79 | ||
80 | return 0; | |
81 | } | |
82 | ||
4139c1b2 | 83 | int bus_unit_append_sub_state(Manager *m, DBusMessageIter *i, const char *property, void *data) { |
10a94420 LP |
84 | Unit *u = data; |
85 | const char *state; | |
86 | ||
87 | assert(m); | |
88 | assert(i); | |
89 | assert(property); | |
90 | assert(u); | |
91 | ||
92 | state = unit_sub_state_to_string(u); | |
93 | ||
94 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &state)) | |
95 | return -ENOMEM; | |
96 | ||
97 | return 0; | |
98 | } | |
99 | ||
4139c1b2 | 100 | int bus_unit_append_can_start(Manager *m, DBusMessageIter *i, const char *property, void *data) { |
38131695 LP |
101 | Unit *u = data; |
102 | dbus_bool_t b; | |
103 | ||
104 | assert(m); | |
105 | assert(i); | |
106 | assert(property); | |
107 | assert(u); | |
108 | ||
4139c1b2 | 109 | b = unit_can_start(u); |
38131695 LP |
110 | |
111 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b)) | |
112 | return -ENOMEM; | |
113 | ||
114 | return 0; | |
115 | } | |
116 | ||
4139c1b2 | 117 | int bus_unit_append_can_reload(Manager *m, DBusMessageIter *i, const char *property, void *data) { |
38131695 LP |
118 | Unit *u = data; |
119 | dbus_bool_t b; | |
120 | ||
121 | assert(m); | |
122 | assert(i); | |
123 | assert(property); | |
124 | assert(u); | |
125 | ||
4139c1b2 | 126 | b = unit_can_reload(u); |
38131695 LP |
127 | |
128 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b)) | |
129 | return -ENOMEM; | |
130 | ||
131 | return 0; | |
132 | } | |
133 | ||
4139c1b2 | 134 | int bus_unit_append_job(Manager *m, DBusMessageIter *i, const char *property, void *data) { |
38131695 LP |
135 | Unit *u = data; |
136 | DBusMessageIter sub; | |
137 | char *p; | |
138 | ||
139 | assert(m); | |
140 | assert(i); | |
141 | assert(property); | |
142 | assert(u); | |
143 | ||
144 | if (!dbus_message_iter_open_container(i, DBUS_TYPE_STRUCT, NULL, &sub)) | |
145 | return -ENOMEM; | |
146 | ||
147 | if (u->meta.job) { | |
148 | ||
149 | if (!(p = job_dbus_path(u->meta.job))) | |
150 | return -ENOMEM; | |
151 | ||
152 | if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_UINT32, &u->meta.job->id) || | |
86ad3bc1 | 153 | !dbus_message_iter_append_basic(&sub, DBUS_TYPE_OBJECT_PATH, &p)) { |
38131695 LP |
154 | free(p); |
155 | return -ENOMEM; | |
156 | } | |
157 | } else { | |
158 | uint32_t id = 0; | |
159 | ||
160 | /* No job, so let's fill in some placeholder | |
161 | * data. Since we need to fill in a valid path we | |
162 | * simple point to ourselves. */ | |
163 | ||
164 | if (!(p = unit_dbus_path(u))) | |
165 | return -ENOMEM; | |
166 | ||
167 | if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_UINT32, &id) || | |
86ad3bc1 | 168 | !dbus_message_iter_append_basic(&sub, DBUS_TYPE_OBJECT_PATH, &p)) { |
38131695 LP |
169 | free(p); |
170 | return -ENOMEM; | |
171 | } | |
172 | } | |
173 | ||
174 | free(p); | |
175 | ||
176 | if (!dbus_message_iter_close_container(i, &sub)) | |
177 | return -ENOMEM; | |
178 | ||
179 | return 0; | |
180 | } | |
181 | ||
4139c1b2 LP |
182 | int bus_unit_append_default_cgroup(Manager *m, DBusMessageIter *i, const char *property, void *data) { |
183 | Unit *u = data; | |
184 | char *t; | |
185 | CGroupBonding *cgb; | |
186 | bool success; | |
ea430986 | 187 | |
4139c1b2 LP |
188 | assert(m); |
189 | assert(i); | |
190 | assert(property); | |
191 | assert(u); | |
192 | ||
193 | if ((cgb = unit_get_default_cgroup(u))) { | |
194 | if (!(t = cgroup_bonding_to_string(cgb))) | |
195 | return -ENOMEM; | |
196 | } else | |
197 | t = (char*) ""; | |
ea430986 | 198 | |
4139c1b2 LP |
199 | success = dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t); |
200 | ||
201 | if (cgb) | |
202 | free(t); | |
203 | ||
204 | return success ? 0 : -ENOMEM; | |
205 | } | |
206 | ||
207 | int bus_unit_append_cgroups(Manager *m, DBusMessageIter *i, const char *property, void *data) { | |
208 | Unit *u = data; | |
209 | CGroupBonding *cgb; | |
210 | DBusMessageIter sub; | |
211 | ||
212 | if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "s", &sub)) | |
213 | return -ENOMEM; | |
214 | ||
215 | LIST_FOREACH(by_unit, cgb, u->meta.cgroup_bondings) { | |
216 | char *t; | |
217 | bool success; | |
218 | ||
219 | if (!(t = cgroup_bonding_to_string(cgb))) | |
220 | return -ENOMEM; | |
221 | ||
222 | success = dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &t); | |
223 | free(t); | |
224 | ||
225 | if (!success) | |
226 | return -ENOMEM; | |
227 | } | |
228 | ||
229 | if (!dbus_message_iter_close_container(i, &sub)) | |
230 | return -ENOMEM; | |
231 | ||
232 | return 0; | |
233 | } | |
234 | ||
235 | DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_unit_append_kill_mode, kill_mode, KillMode); | |
236 | ||
237 | static DBusHandlerResult bus_unit_message_dispatch(Unit *u, DBusMessage *message) { | |
b548631a LP |
238 | DBusMessage *reply = NULL; |
239 | Manager *m = u->meta.manager; | |
240 | DBusError error; | |
241 | JobType job_type = _JOB_TYPE_INVALID; | |
242 | ||
243 | dbus_error_init(&error); | |
244 | ||
245 | if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Start")) | |
246 | job_type = JOB_START; | |
247 | else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Stop")) | |
248 | job_type = JOB_STOP; | |
249 | else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Reload")) | |
250 | job_type = JOB_RELOAD; | |
251 | else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Restart")) | |
252 | job_type = JOB_RESTART; | |
4139c1b2 LP |
253 | else if (UNIT_VTABLE(u)->bus_message_handler) |
254 | return UNIT_VTABLE(u)->bus_message_handler(u, message); | |
b548631a | 255 | else |
4139c1b2 | 256 | return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; |
b548631a LP |
257 | |
258 | if (job_type != _JOB_TYPE_INVALID) { | |
259 | const char *smode; | |
260 | JobMode mode; | |
261 | Job *j; | |
262 | int r; | |
263 | char *path; | |
264 | ||
265 | if (!dbus_message_get_args( | |
266 | message, | |
267 | &error, | |
268 | DBUS_TYPE_STRING, &smode, | |
269 | DBUS_TYPE_INVALID)) | |
270 | return bus_send_error_reply(m, message, &error, -EINVAL); | |
271 | ||
272 | if ((mode = job_mode_from_string(smode)) == _JOB_MODE_INVALID) | |
273 | return bus_send_error_reply(m, message, NULL, -EINVAL); | |
274 | ||
275 | if ((r = manager_add_job(m, job_type, u, mode, true, &j)) < 0) | |
276 | return bus_send_error_reply(m, message, NULL, r); | |
277 | ||
278 | if (!(reply = dbus_message_new_method_return(message))) | |
279 | goto oom; | |
280 | ||
281 | if (!(path = job_dbus_path(j))) | |
282 | goto oom; | |
283 | ||
284 | if (!dbus_message_append_args( | |
285 | reply, | |
286 | DBUS_TYPE_OBJECT_PATH, &path, | |
287 | DBUS_TYPE_INVALID)) | |
288 | goto oom; | |
289 | } | |
290 | ||
291 | if (reply) { | |
f278026d | 292 | if (!dbus_connection_send(m->api_bus, reply, NULL)) |
b548631a LP |
293 | goto oom; |
294 | ||
295 | dbus_message_unref(reply); | |
296 | } | |
297 | ||
298 | return DBUS_HANDLER_RESULT_HANDLED; | |
299 | ||
300 | oom: | |
301 | if (reply) | |
302 | dbus_message_unref(reply); | |
303 | ||
304 | dbus_error_free(&error); | |
305 | ||
306 | return DBUS_HANDLER_RESULT_NEED_MEMORY; | |
ea430986 LP |
307 | } |
308 | ||
309 | static DBusHandlerResult bus_unit_message_handler(DBusConnection *connection, DBusMessage *message, void *data) { | |
310 | Manager *m = data; | |
311 | Unit *u; | |
312 | int r; | |
313 | ||
314 | assert(connection); | |
315 | assert(message); | |
316 | assert(m); | |
317 | ||
318 | log_debug("Got D-Bus request: %s.%s() on %s", | |
319 | dbus_message_get_interface(message), | |
320 | dbus_message_get_member(message), | |
321 | dbus_message_get_path(message)); | |
322 | ||
323 | if ((r = manager_get_unit_from_dbus_path(m, dbus_message_get_path(message), &u)) < 0) { | |
324 | ||
325 | if (r == -ENOMEM) | |
326 | return DBUS_HANDLER_RESULT_NEED_MEMORY; | |
327 | ||
328 | if (r == -ENOENT) | |
329 | return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; | |
330 | ||
331 | return bus_send_error_reply(m, message, NULL, r); | |
332 | } | |
333 | ||
334 | return bus_unit_message_dispatch(u, message); | |
335 | } | |
336 | ||
337 | const DBusObjectPathVTable bus_unit_vtable = { | |
338 | .message_function = bus_unit_message_handler | |
339 | }; | |
c1e1601e LP |
340 | |
341 | void bus_unit_send_change_signal(Unit *u) { | |
342 | char *p = NULL; | |
343 | DBusMessage *m = NULL; | |
344 | ||
345 | assert(u); | |
346 | assert(u->meta.in_dbus_queue); | |
347 | ||
348 | LIST_REMOVE(Meta, dbus_queue, u->meta.manager->dbus_unit_queue, &u->meta); | |
349 | u->meta.in_dbus_queue = false; | |
350 | ||
351 | if (set_isempty(u->meta.manager->subscribed)) | |
352 | return; | |
353 | ||
354 | if (!(p = unit_dbus_path(u))) | |
355 | goto oom; | |
356 | ||
357 | if (u->meta.sent_dbus_new_signal) { | |
358 | /* Send a change signal */ | |
359 | ||
360 | if (!(m = dbus_message_new_signal(p, "org.freedesktop.systemd1.Unit", "Changed"))) | |
361 | goto oom; | |
362 | } else { | |
c1e1601e LP |
363 | /* Send a new signal */ |
364 | ||
701cc384 | 365 | if (!(m = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "UnitNew"))) |
c1e1601e LP |
366 | goto oom; |
367 | ||
c1e1601e | 368 | if (!dbus_message_append_args(m, |
9e2f7c11 | 369 | DBUS_TYPE_STRING, &u->meta.id, |
c1e1601e LP |
370 | DBUS_TYPE_OBJECT_PATH, &p, |
371 | DBUS_TYPE_INVALID)) | |
372 | goto oom; | |
373 | } | |
374 | ||
f278026d | 375 | if (!dbus_connection_send(u->meta.manager->api_bus, m, NULL)) |
c1e1601e LP |
376 | goto oom; |
377 | ||
378 | free(p); | |
379 | dbus_message_unref(m); | |
380 | ||
381 | u->meta.sent_dbus_new_signal = true; | |
382 | ||
383 | return; | |
384 | ||
385 | oom: | |
386 | free(p); | |
387 | ||
388 | if (m) | |
389 | dbus_message_unref(m); | |
390 | ||
391 | log_error("Failed to allocate unit change/new signal."); | |
392 | } | |
393 | ||
394 | void bus_unit_send_removed_signal(Unit *u) { | |
395 | char *p = NULL; | |
396 | DBusMessage *m = NULL; | |
c1e1601e LP |
397 | |
398 | assert(u); | |
399 | ||
400 | if (set_isempty(u->meta.manager->subscribed) || !u->meta.sent_dbus_new_signal) | |
401 | return; | |
402 | ||
403 | if (!(p = unit_dbus_path(u))) | |
404 | goto oom; | |
405 | ||
701cc384 | 406 | if (!(m = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "UnitRemoved"))) |
c1e1601e LP |
407 | goto oom; |
408 | ||
c1e1601e | 409 | if (!dbus_message_append_args(m, |
9e2f7c11 | 410 | DBUS_TYPE_STRING, &u->meta.id, |
c1e1601e LP |
411 | DBUS_TYPE_OBJECT_PATH, &p, |
412 | DBUS_TYPE_INVALID)) | |
413 | goto oom; | |
414 | ||
f278026d | 415 | if (!dbus_connection_send(u->meta.manager->api_bus, m, NULL)) |
c1e1601e LP |
416 | goto oom; |
417 | ||
418 | free(p); | |
419 | dbus_message_unref(m); | |
420 | ||
421 | return; | |
422 | ||
423 | oom: | |
424 | free(p); | |
425 | ||
426 | if (m) | |
427 | dbus_message_unref(m); | |
428 | ||
429 | log_error("Failed to allocate unit remove signal."); | |
430 | } |