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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" | |
26 | ||
27 | static const char introspection[] = | |
28 | DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE | |
29 | "<node>" | |
ea430986 | 30 | " <interface name=\"org.freedesktop.systemd1.Unit\">" |
b548631a LP |
31 | " <method name=\"Start\">" |
32 | " <arg name=\"mode\" type=\"s\" direction=\"in\"/>" | |
33 | " <arg name=\"job\" type=\"o\" direction=\"out\"/>" | |
34 | " </method>" | |
35 | " <method name=\"Stop\">" | |
36 | " <arg name=\"mode\" type=\"s\" direction=\"in\"/>" | |
37 | " <arg name=\"job\" type=\"o\" direction=\"out\"/>" | |
38 | " </method>" | |
39 | " <method name=\"Restart\">" | |
40 | " <arg name=\"mode\" type=\"s\" direction=\"in\"/>" | |
41 | " <arg name=\"job\" type=\"o\" direction=\"out\"/>" | |
42 | " </method>" | |
43 | " <method name=\"Reload\">" | |
44 | " <arg name=\"mode\" type=\"s\" direction=\"in\"/>" | |
45 | " <arg name=\"job\" type=\"o\" direction=\"out\"/>" | |
46 | " </method>" | |
c1e1601e | 47 | " <signal name=\"Changed\"/>" |
ea430986 LP |
48 | " <property name=\"Id\" type=\"s\" access=\"read\"/>" |
49 | " <property name=\"Description\" type=\"s\" access=\"read\"/>" | |
50 | " <property name=\"LoadState\" type=\"s\" access=\"read\"/>" | |
51 | " <property name=\"ActiveState\" type=\"s\" access=\"read\"/>" | |
10a94420 | 52 | " <property name=\"SubState\" type=\"s\" access=\"read\"/>" |
6be1e7d5 | 53 | " <property name=\"FragmentPath\" type=\"s\" access=\"read\"/>" |
38131695 LP |
54 | " <property name=\"ActiveEnterTimestamp\" type=\"t\" access=\"read\"/>" |
55 | " <property name=\"ActiveExitTimestamp\" type=\"t\" access=\"read\"/>" | |
56 | " <property name=\"CanReload\" type=\"b\" access=\"read\"/>" | |
57 | " <property name=\"CanStart\" type=\"b\" access=\"read\"/>" | |
58 | " <property name=\"Job\" type=\"(uo)\" access=\"read\"/>" | |
ea430986 LP |
59 | " </interface>" |
60 | BUS_PROPERTIES_INTERFACE | |
61 | BUS_INTROSPECTABLE_INTERFACE | |
62 | "</node>"; | |
63 | ||
64 | static int bus_unit_append_id(Manager *m, DBusMessageIter *i, const char *property, void *data) { | |
65 | Unit *u = data; | |
66 | const char *id; | |
67 | ||
68 | assert(m); | |
69 | assert(i); | |
70 | assert(property); | |
71 | assert(u); | |
72 | ||
73 | id = unit_id(u); | |
74 | ||
c401a1e0 | 75 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &id)) |
ea430986 LP |
76 | return -ENOMEM; |
77 | ||
78 | return 0; | |
79 | } | |
80 | ||
81 | static int bus_unit_append_description(Manager *m, DBusMessageIter *i, const char *property, void *data) { | |
82 | Unit *u = data; | |
83 | const char *d; | |
84 | ||
85 | assert(m); | |
86 | assert(i); | |
87 | assert(property); | |
88 | assert(u); | |
89 | ||
90 | d = unit_description(u); | |
91 | ||
92 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &d)) | |
93 | return -ENOMEM; | |
94 | ||
95 | return 0; | |
96 | } | |
97 | ||
6f4706b7 | 98 | DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_unit_append_load_state, unit_load_state, UnitLoadState); |
ea430986 LP |
99 | |
100 | static int bus_unit_append_active_state(Manager *m, DBusMessageIter *i, const char *property, void *data) { | |
101 | Unit *u = data; | |
102 | const char *state; | |
103 | ||
104 | assert(m); | |
105 | assert(i); | |
106 | assert(property); | |
107 | assert(u); | |
108 | ||
109 | state = unit_active_state_to_string(unit_active_state(u)); | |
110 | ||
111 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &state)) | |
112 | return -ENOMEM; | |
113 | ||
114 | return 0; | |
115 | } | |
116 | ||
10a94420 LP |
117 | static int bus_unit_append_sub_state(Manager *m, DBusMessageIter *i, const char *property, void *data) { |
118 | Unit *u = data; | |
119 | const char *state; | |
120 | ||
121 | assert(m); | |
122 | assert(i); | |
123 | assert(property); | |
124 | assert(u); | |
125 | ||
126 | state = unit_sub_state_to_string(u); | |
127 | ||
128 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &state)) | |
129 | return -ENOMEM; | |
130 | ||
131 | return 0; | |
132 | } | |
133 | ||
38131695 LP |
134 | static int bus_unit_append_can_reload(Manager *m, DBusMessageIter *i, const char *property, void *data) { |
135 | Unit *u = data; | |
136 | dbus_bool_t b; | |
137 | ||
138 | assert(m); | |
139 | assert(i); | |
140 | assert(property); | |
141 | assert(u); | |
142 | ||
143 | b = unit_can_reload(u); | |
144 | ||
145 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b)) | |
146 | return -ENOMEM; | |
147 | ||
148 | return 0; | |
149 | } | |
150 | ||
151 | static int bus_unit_append_can_start(Manager *m, DBusMessageIter *i, const char *property, void *data) { | |
152 | Unit *u = data; | |
153 | dbus_bool_t b; | |
154 | ||
155 | assert(m); | |
156 | assert(i); | |
157 | assert(property); | |
158 | assert(u); | |
159 | ||
160 | b = unit_can_start(u); | |
161 | ||
162 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b)) | |
163 | return -ENOMEM; | |
164 | ||
165 | return 0; | |
166 | } | |
167 | ||
168 | static int bus_unit_append_job(Manager *m, DBusMessageIter *i, const char *property, void *data) { | |
169 | Unit *u = data; | |
170 | DBusMessageIter sub; | |
171 | char *p; | |
172 | ||
173 | assert(m); | |
174 | assert(i); | |
175 | assert(property); | |
176 | assert(u); | |
177 | ||
178 | if (!dbus_message_iter_open_container(i, DBUS_TYPE_STRUCT, NULL, &sub)) | |
179 | return -ENOMEM; | |
180 | ||
181 | if (u->meta.job) { | |
182 | ||
183 | if (!(p = job_dbus_path(u->meta.job))) | |
184 | return -ENOMEM; | |
185 | ||
186 | if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_UINT32, &u->meta.job->id) || | |
86ad3bc1 | 187 | !dbus_message_iter_append_basic(&sub, DBUS_TYPE_OBJECT_PATH, &p)) { |
38131695 LP |
188 | free(p); |
189 | return -ENOMEM; | |
190 | } | |
191 | } else { | |
192 | uint32_t id = 0; | |
193 | ||
194 | /* No job, so let's fill in some placeholder | |
195 | * data. Since we need to fill in a valid path we | |
196 | * simple point to ourselves. */ | |
197 | ||
198 | if (!(p = unit_dbus_path(u))) | |
199 | return -ENOMEM; | |
200 | ||
201 | if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_UINT32, &id) || | |
86ad3bc1 | 202 | !dbus_message_iter_append_basic(&sub, DBUS_TYPE_OBJECT_PATH, &p)) { |
38131695 LP |
203 | free(p); |
204 | return -ENOMEM; | |
205 | } | |
206 | } | |
207 | ||
208 | free(p); | |
209 | ||
210 | if (!dbus_message_iter_close_container(i, &sub)) | |
211 | return -ENOMEM; | |
212 | ||
213 | return 0; | |
214 | } | |
215 | ||
ea430986 LP |
216 | static DBusHandlerResult bus_unit_message_dispatch(Unit *u, DBusMessage *message) { |
217 | ||
218 | const BusProperty properties[] = { | |
38131695 LP |
219 | { "org.freedesktop.systemd1.Unit", "Id", bus_unit_append_id, "s", u }, |
220 | { "org.freedesktop.systemd1.Unit", "Description", bus_unit_append_description, "s", u }, | |
6f4706b7 | 221 | { "org.freedesktop.systemd1.Unit", "LoadState", bus_unit_append_load_state, "s", &u->meta.load_state }, |
38131695 | 222 | { "org.freedesktop.systemd1.Unit", "ActiveState", bus_unit_append_active_state, "s", u }, |
10a94420 | 223 | { "org.freedesktop.systemd1.Unit", "SubState", bus_unit_append_sub_state, "s", u }, |
6be1e7d5 | 224 | { "org.freedesktop.systemd1.Unit", "FragmentPath", bus_property_append_string, "s", u->meta.fragment_path }, |
38131695 LP |
225 | { "org.freedesktop.systemd1.Unit", "ActiveEnterTimestamp", bus_property_append_uint64, "t", &u->meta.active_enter_timestamp }, |
226 | { "org.freedesktop.systemd1.Unit", "ActiveExitTimestamp", bus_property_append_uint64, "t", &u->meta.active_exit_timestamp }, | |
227 | { "org.freedesktop.systemd1.Unit", "CanReload", bus_unit_append_can_reload, "b", u }, | |
228 | { "org.freedesktop.systemd1.Unit", "CanStart", bus_unit_append_can_start, "b", u }, | |
86ad3bc1 | 229 | { "org.freedesktop.systemd1.Unit", "Job", bus_unit_append_job, "(uo)", u }, |
ea430986 LP |
230 | { NULL, NULL, NULL, NULL, NULL } |
231 | }; | |
232 | ||
b548631a LP |
233 | DBusMessage *reply = NULL; |
234 | Manager *m = u->meta.manager; | |
235 | DBusError error; | |
236 | JobType job_type = _JOB_TYPE_INVALID; | |
237 | ||
238 | dbus_error_init(&error); | |
239 | ||
240 | if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Start")) | |
241 | job_type = JOB_START; | |
242 | else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Stop")) | |
243 | job_type = JOB_STOP; | |
244 | else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Reload")) | |
245 | job_type = JOB_RELOAD; | |
246 | else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Restart")) | |
247 | job_type = JOB_RESTART; | |
248 | else | |
249 | return bus_default_message_handler(u->meta.manager, message, introspection, properties); | |
250 | ||
251 | if (job_type != _JOB_TYPE_INVALID) { | |
252 | const char *smode; | |
253 | JobMode mode; | |
254 | Job *j; | |
255 | int r; | |
256 | char *path; | |
257 | ||
258 | if (!dbus_message_get_args( | |
259 | message, | |
260 | &error, | |
261 | DBUS_TYPE_STRING, &smode, | |
262 | DBUS_TYPE_INVALID)) | |
263 | return bus_send_error_reply(m, message, &error, -EINVAL); | |
264 | ||
265 | if ((mode = job_mode_from_string(smode)) == _JOB_MODE_INVALID) | |
266 | return bus_send_error_reply(m, message, NULL, -EINVAL); | |
267 | ||
268 | if ((r = manager_add_job(m, job_type, u, mode, true, &j)) < 0) | |
269 | return bus_send_error_reply(m, message, NULL, r); | |
270 | ||
271 | if (!(reply = dbus_message_new_method_return(message))) | |
272 | goto oom; | |
273 | ||
274 | if (!(path = job_dbus_path(j))) | |
275 | goto oom; | |
276 | ||
277 | if (!dbus_message_append_args( | |
278 | reply, | |
279 | DBUS_TYPE_OBJECT_PATH, &path, | |
280 | DBUS_TYPE_INVALID)) | |
281 | goto oom; | |
282 | } | |
283 | ||
284 | if (reply) { | |
f278026d | 285 | if (!dbus_connection_send(m->api_bus, reply, NULL)) |
b548631a LP |
286 | goto oom; |
287 | ||
288 | dbus_message_unref(reply); | |
289 | } | |
290 | ||
291 | return DBUS_HANDLER_RESULT_HANDLED; | |
292 | ||
293 | oom: | |
294 | if (reply) | |
295 | dbus_message_unref(reply); | |
296 | ||
297 | dbus_error_free(&error); | |
298 | ||
299 | return DBUS_HANDLER_RESULT_NEED_MEMORY; | |
ea430986 LP |
300 | } |
301 | ||
302 | static DBusHandlerResult bus_unit_message_handler(DBusConnection *connection, DBusMessage *message, void *data) { | |
303 | Manager *m = data; | |
304 | Unit *u; | |
305 | int r; | |
306 | ||
307 | assert(connection); | |
308 | assert(message); | |
309 | assert(m); | |
310 | ||
311 | log_debug("Got D-Bus request: %s.%s() on %s", | |
312 | dbus_message_get_interface(message), | |
313 | dbus_message_get_member(message), | |
314 | dbus_message_get_path(message)); | |
315 | ||
316 | if ((r = manager_get_unit_from_dbus_path(m, dbus_message_get_path(message), &u)) < 0) { | |
317 | ||
318 | if (r == -ENOMEM) | |
319 | return DBUS_HANDLER_RESULT_NEED_MEMORY; | |
320 | ||
321 | if (r == -ENOENT) | |
322 | return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; | |
323 | ||
324 | return bus_send_error_reply(m, message, NULL, r); | |
325 | } | |
326 | ||
327 | return bus_unit_message_dispatch(u, message); | |
328 | } | |
329 | ||
330 | const DBusObjectPathVTable bus_unit_vtable = { | |
331 | .message_function = bus_unit_message_handler | |
332 | }; | |
c1e1601e LP |
333 | |
334 | void bus_unit_send_change_signal(Unit *u) { | |
335 | char *p = NULL; | |
336 | DBusMessage *m = NULL; | |
337 | ||
338 | assert(u); | |
339 | assert(u->meta.in_dbus_queue); | |
340 | ||
341 | LIST_REMOVE(Meta, dbus_queue, u->meta.manager->dbus_unit_queue, &u->meta); | |
342 | u->meta.in_dbus_queue = false; | |
343 | ||
344 | if (set_isempty(u->meta.manager->subscribed)) | |
345 | return; | |
346 | ||
347 | if (!(p = unit_dbus_path(u))) | |
348 | goto oom; | |
349 | ||
350 | if (u->meta.sent_dbus_new_signal) { | |
351 | /* Send a change signal */ | |
352 | ||
353 | if (!(m = dbus_message_new_signal(p, "org.freedesktop.systemd1.Unit", "Changed"))) | |
354 | goto oom; | |
355 | } else { | |
356 | const char *id; | |
357 | /* Send a new signal */ | |
358 | ||
359 | if (!(m = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1", "UnitNew"))) | |
360 | goto oom; | |
361 | ||
362 | id = unit_id(u); | |
363 | if (!dbus_message_append_args(m, | |
364 | DBUS_TYPE_STRING, &id, | |
365 | DBUS_TYPE_OBJECT_PATH, &p, | |
366 | DBUS_TYPE_INVALID)) | |
367 | goto oom; | |
368 | } | |
369 | ||
f278026d | 370 | if (!dbus_connection_send(u->meta.manager->api_bus, m, NULL)) |
c1e1601e LP |
371 | goto oom; |
372 | ||
373 | free(p); | |
374 | dbus_message_unref(m); | |
375 | ||
376 | u->meta.sent_dbus_new_signal = true; | |
377 | ||
378 | return; | |
379 | ||
380 | oom: | |
381 | free(p); | |
382 | ||
383 | if (m) | |
384 | dbus_message_unref(m); | |
385 | ||
386 | log_error("Failed to allocate unit change/new signal."); | |
387 | } | |
388 | ||
389 | void bus_unit_send_removed_signal(Unit *u) { | |
390 | char *p = NULL; | |
391 | DBusMessage *m = NULL; | |
392 | const char *id; | |
393 | ||
394 | assert(u); | |
395 | ||
396 | if (set_isempty(u->meta.manager->subscribed) || !u->meta.sent_dbus_new_signal) | |
397 | return; | |
398 | ||
399 | if (!(p = unit_dbus_path(u))) | |
400 | goto oom; | |
401 | ||
402 | if (!(m = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1", "UnitRemoved"))) | |
403 | goto oom; | |
404 | ||
405 | id = unit_id(u); | |
406 | if (!dbus_message_append_args(m, | |
407 | DBUS_TYPE_STRING, &id, | |
408 | DBUS_TYPE_OBJECT_PATH, &p, | |
409 | DBUS_TYPE_INVALID)) | |
410 | goto oom; | |
411 | ||
f278026d | 412 | if (!dbus_connection_send(u->meta.manager->api_bus, m, NULL)) |
c1e1601e LP |
413 | goto oom; |
414 | ||
415 | free(p); | |
416 | dbus_message_unref(m); | |
417 | ||
418 | return; | |
419 | ||
420 | oom: | |
421 | free(p); | |
422 | ||
423 | if (m) | |
424 | dbus_message_unref(m); | |
425 | ||
426 | log_error("Failed to allocate unit remove signal."); | |
427 | } |