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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
ea430986 | 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 | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
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 | |
5430f7f2 | 16 | Lesser General Public License for more details. |
a7334b09 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
86fbf370 LP |
22 | #include <errno.h> |
23 | ||
ea430986 LP |
24 | #include "dbus.h" |
25 | #include "log.h" | |
4139c1b2 | 26 | #include "dbus-job.h" |
bfebab7f | 27 | #include "dbus-common.h" |
cad45ba1 | 28 | #include "selinux-access.h" |
ea430986 | 29 | |
4288f619 LP |
30 | #define BUS_JOB_INTERFACE \ |
31 | " <interface name=\"org.freedesktop.systemd1.Job\">\n" \ | |
32 | " <method name=\"Cancel\"/>\n" \ | |
4288f619 LP |
33 | " <property name=\"Id\" type=\"u\" access=\"read\"/>\n" \ |
34 | " <property name=\"Unit\" type=\"(so)\" access=\"read\"/>\n" \ | |
35 | " <property name=\"JobType\" type=\"s\" access=\"read\"/>\n" \ | |
36 | " <property name=\"State\" type=\"s\" access=\"read\"/>\n" \ | |
37 | " </interface>\n" | |
38 | ||
39 | #define INTROSPECTION \ | |
40 | DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE \ | |
41 | "<node>\n" \ | |
42 | BUS_JOB_INTERFACE \ | |
43 | BUS_PROPERTIES_INTERFACE \ | |
c4e2ceae | 44 | BUS_PEER_INTERFACE \ |
4288f619 LP |
45 | BUS_INTROSPECTABLE_INTERFACE \ |
46 | "</node>\n" | |
47 | ||
9a60da28 | 48 | const char bus_job_interface[] _introspect_("Job") = BUS_JOB_INTERFACE; |
ea430986 | 49 | |
05feefe0 LP |
50 | #define INTERFACES_LIST \ |
51 | BUS_GENERIC_INTERFACES_LIST \ | |
52 | "org.freedesktop.systemd1.Job\0" | |
53 | ||
c4e2ceae | 54 | #define INVALIDATING_PROPERTIES \ |
34df5a34 | 55 | "State\0" |
c4e2ceae | 56 | |
4139c1b2 LP |
57 | static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_job_append_state, job_state, JobState); |
58 | static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_job_append_type, job_type, JobType); | |
86fbf370 | 59 | |
bfebab7f | 60 | static int bus_job_append_unit(DBusMessageIter *i, const char *property, void *data) { |
86fbf370 LP |
61 | Job *j = data; |
62 | DBusMessageIter sub; | |
63 | char *p; | |
86fbf370 | 64 | |
86fbf370 LP |
65 | assert(i); |
66 | assert(property); | |
67 | assert(j); | |
68 | ||
69 | if (!dbus_message_iter_open_container(i, DBUS_TYPE_STRUCT, NULL, &sub)) | |
70 | return -ENOMEM; | |
71 | ||
cad45ba1 LP |
72 | p = unit_dbus_path(j->unit); |
73 | if (!p) | |
86fbf370 LP |
74 | return -ENOMEM; |
75 | ||
ac155bb8 | 76 | if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &j->unit->id) || |
86fbf370 LP |
77 | !dbus_message_iter_append_basic(&sub, DBUS_TYPE_OBJECT_PATH, &p)) { |
78 | free(p); | |
79 | return -ENOMEM; | |
80 | } | |
81 | ||
82 | free(p); | |
83 | ||
84 | if (!dbus_message_iter_close_container(i, &sub)) | |
85 | return -ENOMEM; | |
86 | ||
87 | return 0; | |
88 | } | |
89 | ||
d200735e MS |
90 | static const BusProperty bus_job_properties[] = { |
91 | { "Id", bus_property_append_uint32, "u", offsetof(Job, id) }, | |
92 | { "State", bus_job_append_state, "s", offsetof(Job, state) }, | |
93 | { "JobType", bus_job_append_type, "s", offsetof(Job, type) }, | |
94 | { "Unit", bus_job_append_unit, "(so)", 0 }, | |
95 | { NULL, } | |
96 | }; | |
86fbf370 | 97 | |
d200735e | 98 | static DBusHandlerResult bus_job_message_dispatch(Job *j, DBusConnection *connection, DBusMessage *message) { |
cad45ba1 | 99 | _cleanup_dbus_message_unref_ DBusMessage *reply = NULL; |
b548631a LP |
100 | |
101 | if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Job", "Cancel")) { | |
b548631a | 102 | |
cad45ba1 LP |
103 | SELINUX_UNIT_ACCESS_CHECK(j->unit, connection, message, "stop"); |
104 | ||
105 | reply = dbus_message_new_method_return(message); | |
106 | if (!reply) | |
107 | return DBUS_HANDLER_RESULT_NEED_MEMORY; | |
b548631a | 108 | |
cad45ba1 | 109 | job_finish_and_invalidate(j, JOB_CANCELED, true); |
d200735e MS |
110 | } else { |
111 | const BusBoundProperties bps[] = { | |
112 | { "org.freedesktop.systemd1.Job", bus_job_properties, j }, | |
113 | { NULL, } | |
114 | }; | |
b548631a | 115 | |
cad45ba1 | 116 | SELINUX_UNIT_ACCESS_CHECK(j->unit, connection, message, "status"); |
b548631a | 117 | |
cad45ba1 | 118 | return bus_default_message_handler(connection, message, INTROSPECTION, INTERFACES_LIST, bps); |
b548631a LP |
119 | } |
120 | ||
cad45ba1 LP |
121 | if (!dbus_connection_send(connection, reply, NULL)) |
122 | return DBUS_HANDLER_RESULT_NEED_MEMORY; | |
b548631a | 123 | |
cad45ba1 | 124 | return DBUS_HANDLER_RESULT_HANDLED; |
86fbf370 LP |
125 | } |
126 | ||
5e8d1c9a | 127 | static DBusHandlerResult bus_job_message_handler(DBusConnection *connection, DBusMessage *message, void *data) { |
ea430986 | 128 | Manager *m = data; |
86fbf370 LP |
129 | Job *j; |
130 | int r; | |
cad45ba1 | 131 | _cleanup_dbus_message_unref_ DBusMessage *reply = NULL; |
ea430986 LP |
132 | |
133 | assert(connection); | |
134 | assert(message); | |
135 | assert(m); | |
136 | ||
2cccbca4 LP |
137 | if (streq(dbus_message_get_path(message), "/org/freedesktop/systemd1/job")) { |
138 | /* Be nice to gdbus and return introspection data for our mid-level paths */ | |
139 | ||
140 | if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Introspectable", "Introspect")) { | |
141 | char *introspection = NULL; | |
142 | FILE *f; | |
143 | Iterator i; | |
144 | size_t size; | |
145 | ||
ffc227c9 | 146 | SELINUX_ACCESS_CHECK(connection, message, "status"); |
cad45ba1 LP |
147 | |
148 | reply = dbus_message_new_method_return(message); | |
149 | if (!reply) | |
2cccbca4 LP |
150 | goto oom; |
151 | ||
152 | /* We roll our own introspection code here, instead of | |
153 | * relying on bus_default_message_handler() because we | |
154 | * need to generate our introspection string | |
155 | * dynamically. */ | |
156 | ||
cad45ba1 LP |
157 | f = open_memstream(&introspection, &size); |
158 | if (!f) | |
2cccbca4 LP |
159 | goto oom; |
160 | ||
161 | fputs(DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE | |
162 | "<node>\n", f); | |
163 | ||
164 | fputs(BUS_INTROSPECTABLE_INTERFACE, f); | |
165 | fputs(BUS_PEER_INTERFACE, f); | |
166 | ||
167 | HASHMAP_FOREACH(j, m->jobs, i) | |
168 | fprintf(f, "<node name=\"job/%lu\"/>", (unsigned long) j->id); | |
169 | ||
170 | fputs("</node>\n", f); | |
171 | ||
172 | if (ferror(f)) { | |
173 | fclose(f); | |
174 | free(introspection); | |
175 | goto oom; | |
176 | } | |
177 | ||
178 | fclose(f); | |
179 | ||
180 | if (!introspection) | |
181 | goto oom; | |
182 | ||
183 | if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &introspection, DBUS_TYPE_INVALID)) { | |
184 | free(introspection); | |
185 | goto oom; | |
186 | } | |
187 | ||
188 | free(introspection); | |
189 | ||
190 | if (!dbus_connection_send(connection, reply, NULL)) | |
191 | goto oom; | |
192 | ||
2cccbca4 LP |
193 | return DBUS_HANDLER_RESULT_HANDLED; |
194 | } | |
195 | ||
196 | return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; | |
197 | } | |
198 | ||
cad45ba1 LP |
199 | r = manager_get_job_from_dbus_path(m, dbus_message_get_path(message), &j); |
200 | if (r == -ENOMEM) | |
201 | goto oom; | |
202 | if (r == -ENOENT) { | |
203 | DBusError e; | |
86fbf370 | 204 | |
cad45ba1 LP |
205 | dbus_error_init(&e); |
206 | dbus_set_error_const(&e, DBUS_ERROR_UNKNOWN_OBJECT, "Unknown job"); | |
207 | return bus_send_error_reply(connection, message, &e, r); | |
86fbf370 | 208 | } |
cad45ba1 LP |
209 | if (r < 0) |
210 | return bus_send_error_reply(connection, message, NULL, r); | |
86fbf370 | 211 | |
5e8d1c9a | 212 | return bus_job_message_dispatch(j, connection, message); |
2cccbca4 LP |
213 | |
214 | oom: | |
2cccbca4 | 215 | return DBUS_HANDLER_RESULT_NEED_MEMORY; |
ea430986 LP |
216 | } |
217 | ||
218 | const DBusObjectPathVTable bus_job_vtable = { | |
219 | .message_function = bus_job_message_handler | |
220 | }; | |
c1e1601e | 221 | |
97e6a119 MS |
222 | static int job_send_message(Job *j, DBusMessage* (*new_message)(Job *j)) { |
223 | DBusMessage *m = NULL; | |
a567261a LP |
224 | int r; |
225 | ||
226 | assert(j); | |
97e6a119 | 227 | assert(new_message); |
a567261a | 228 | |
39a18c60 | 229 | if (bus_has_subscriber(j->manager) || j->forgot_bus_clients) { |
97e6a119 MS |
230 | m = new_message(j); |
231 | if (!m) | |
232 | goto oom; | |
233 | r = bus_broadcast(j->manager, m); | |
234 | dbus_message_unref(m); | |
235 | if (r < 0) | |
a567261a LP |
236 | return r; |
237 | ||
97e6a119 | 238 | } else { |
a567261a | 239 | /* If nobody is subscribed, we just send the message |
97e6a119 MS |
240 | * to the client(s) which created the job */ |
241 | JobBusClient *cl; | |
242 | assert(j->bus_client_list); | |
243 | LIST_FOREACH(client, cl, j->bus_client_list) { | |
244 | assert(cl->bus); | |
245 | ||
246 | m = new_message(j); | |
247 | if (!m) | |
248 | goto oom; | |
a567261a | 249 | |
97e6a119 MS |
250 | if (!dbus_message_set_destination(m, cl->name)) |
251 | goto oom; | |
a567261a | 252 | |
97e6a119 MS |
253 | if (!dbus_connection_send(cl->bus, m, NULL)) |
254 | goto oom; | |
a567261a | 255 | |
97e6a119 MS |
256 | dbus_message_unref(m); |
257 | m = NULL; | |
258 | } | |
a567261a LP |
259 | } |
260 | ||
261 | return 0; | |
97e6a119 MS |
262 | oom: |
263 | if (m) | |
264 | dbus_message_unref(m); | |
265 | return -ENOMEM; | |
a567261a LP |
266 | } |
267 | ||
97e6a119 | 268 | static DBusMessage* new_change_signal_message(Job *j) { |
c1e1601e | 269 | DBusMessage *m = NULL; |
97e6a119 | 270 | char *p = NULL; |
c1e1601e | 271 | |
97e6a119 MS |
272 | p = job_dbus_path(j); |
273 | if (!p) | |
c1e1601e LP |
274 | goto oom; |
275 | ||
276 | if (j->sent_dbus_new_signal) { | |
c4e2ceae | 277 | /* Send a properties changed signal */ |
97e6a119 MS |
278 | m = bus_properties_changed_new(p, "org.freedesktop.systemd1.Job", INVALIDATING_PROPERTIES); |
279 | if (!m) | |
c1e1601e | 280 | goto oom; |
c4e2ceae | 281 | |
c1e1601e LP |
282 | } else { |
283 | /* Send a new signal */ | |
284 | ||
97e6a119 MS |
285 | m = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "JobNew"); |
286 | if (!m) | |
c1e1601e LP |
287 | goto oom; |
288 | ||
289 | if (!dbus_message_append_args(m, | |
290 | DBUS_TYPE_UINT32, &j->id, | |
291 | DBUS_TYPE_OBJECT_PATH, &p, | |
06dab8e1 | 292 | DBUS_TYPE_STRING, &j->unit->id, |
c1e1601e LP |
293 | DBUS_TYPE_INVALID)) |
294 | goto oom; | |
295 | } | |
296 | ||
97e6a119 | 297 | return m; |
c1e1601e LP |
298 | |
299 | oom: | |
c1e1601e LP |
300 | if (m) |
301 | dbus_message_unref(m); | |
97e6a119 MS |
302 | free(p); |
303 | return NULL; | |
c1e1601e LP |
304 | } |
305 | ||
97e6a119 | 306 | static DBusMessage* new_removed_signal_message(Job *j) { |
c1e1601e | 307 | DBusMessage *m = NULL; |
97e6a119 | 308 | char *p = NULL; |
5d44db4a | 309 | const char *r; |
c1e1601e | 310 | |
97e6a119 MS |
311 | p = job_dbus_path(j); |
312 | if (!p) | |
c1e1601e LP |
313 | goto oom; |
314 | ||
97e6a119 MS |
315 | m = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "JobRemoved"); |
316 | if (!m) | |
c1e1601e LP |
317 | goto oom; |
318 | ||
5d44db4a LP |
319 | r = job_result_to_string(j->result); |
320 | ||
c1e1601e LP |
321 | if (!dbus_message_append_args(m, |
322 | DBUS_TYPE_UINT32, &j->id, | |
323 | DBUS_TYPE_OBJECT_PATH, &p, | |
06dab8e1 | 324 | DBUS_TYPE_STRING, &j->unit->id, |
5d44db4a | 325 | DBUS_TYPE_STRING, &r, |
c1e1601e LP |
326 | DBUS_TYPE_INVALID)) |
327 | goto oom; | |
328 | ||
97e6a119 | 329 | return m; |
c1e1601e | 330 | |
97e6a119 MS |
331 | oom: |
332 | if (m) | |
333 | dbus_message_unref(m); | |
c1e1601e | 334 | free(p); |
97e6a119 MS |
335 | return NULL; |
336 | } | |
337 | ||
338 | void bus_job_send_change_signal(Job *j) { | |
339 | assert(j); | |
340 | ||
341 | if (j->in_dbus_queue) { | |
342 | LIST_REMOVE(Job, dbus_queue, j->manager->dbus_job_queue, j); | |
343 | j->in_dbus_queue = false; | |
344 | } | |
345 | ||
39a18c60 | 346 | if (!bus_has_subscriber(j->manager) && !j->bus_client_list && !j->forgot_bus_clients) { |
97e6a119 MS |
347 | j->sent_dbus_new_signal = true; |
348 | return; | |
349 | } | |
350 | ||
351 | if (job_send_message(j, new_change_signal_message) < 0) | |
352 | goto oom; | |
353 | ||
354 | j->sent_dbus_new_signal = true; | |
c1e1601e LP |
355 | |
356 | return; | |
357 | ||
358 | oom: | |
97e6a119 MS |
359 | log_error("Failed to allocate job change signal."); |
360 | } | |
c1e1601e | 361 | |
97e6a119 MS |
362 | void bus_job_send_removed_signal(Job *j) { |
363 | assert(j); | |
c1e1601e | 364 | |
39a18c60 | 365 | if (!bus_has_subscriber(j->manager) && !j->bus_client_list && !j->forgot_bus_clients) |
97e6a119 MS |
366 | return; |
367 | ||
368 | if (!j->sent_dbus_new_signal) | |
369 | bus_job_send_change_signal(j); | |
370 | ||
371 | if (job_send_message(j, new_removed_signal_message) < 0) | |
372 | goto oom; | |
373 | ||
374 | return; | |
375 | ||
376 | oom: | |
c1e1601e LP |
377 | log_error("Failed to allocate job remove signal."); |
378 | } |