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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 | 103 | SELINUX_UNIT_ACCESS_CHECK(j->unit, connection, message, "stop"); |
5dd9014f | 104 | job_finish_and_invalidate(j, JOB_CANCELED, true); |
cad45ba1 LP |
105 | |
106 | reply = dbus_message_new_method_return(message); | |
107 | if (!reply) | |
108 | return DBUS_HANDLER_RESULT_NEED_MEMORY; | |
d200735e MS |
109 | } else { |
110 | const BusBoundProperties bps[] = { | |
111 | { "org.freedesktop.systemd1.Job", bus_job_properties, j }, | |
112 | { NULL, } | |
113 | }; | |
b548631a | 114 | |
cad45ba1 | 115 | SELINUX_UNIT_ACCESS_CHECK(j->unit, connection, message, "status"); |
cad45ba1 | 116 | return bus_default_message_handler(connection, message, INTROSPECTION, INTERFACES_LIST, bps); |
b548631a LP |
117 | } |
118 | ||
c6a818c8 | 119 | if (!bus_maybe_send_reply(connection, message, reply)) |
cad45ba1 | 120 | return DBUS_HANDLER_RESULT_NEED_MEMORY; |
b548631a | 121 | |
cad45ba1 | 122 | return DBUS_HANDLER_RESULT_HANDLED; |
86fbf370 LP |
123 | } |
124 | ||
5e8d1c9a | 125 | static DBusHandlerResult bus_job_message_handler(DBusConnection *connection, DBusMessage *message, void *data) { |
ea430986 | 126 | Manager *m = data; |
86fbf370 LP |
127 | Job *j; |
128 | int r; | |
cad45ba1 | 129 | _cleanup_dbus_message_unref_ DBusMessage *reply = NULL; |
ea430986 LP |
130 | |
131 | assert(connection); | |
132 | assert(message); | |
133 | assert(m); | |
134 | ||
2cccbca4 LP |
135 | if (streq(dbus_message_get_path(message), "/org/freedesktop/systemd1/job")) { |
136 | /* Be nice to gdbus and return introspection data for our mid-level paths */ | |
137 | ||
138 | if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Introspectable", "Introspect")) { | |
139 | char *introspection = NULL; | |
140 | FILE *f; | |
141 | Iterator i; | |
142 | size_t size; | |
143 | ||
ffc227c9 | 144 | SELINUX_ACCESS_CHECK(connection, message, "status"); |
cad45ba1 LP |
145 | |
146 | reply = dbus_message_new_method_return(message); | |
147 | if (!reply) | |
2cccbca4 LP |
148 | goto oom; |
149 | ||
150 | /* We roll our own introspection code here, instead of | |
151 | * relying on bus_default_message_handler() because we | |
152 | * need to generate our introspection string | |
153 | * dynamically. */ | |
154 | ||
cad45ba1 LP |
155 | f = open_memstream(&introspection, &size); |
156 | if (!f) | |
2cccbca4 LP |
157 | goto oom; |
158 | ||
159 | fputs(DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE | |
160 | "<node>\n", f); | |
161 | ||
162 | fputs(BUS_INTROSPECTABLE_INTERFACE, f); | |
163 | fputs(BUS_PEER_INTERFACE, f); | |
164 | ||
165 | HASHMAP_FOREACH(j, m->jobs, i) | |
166 | fprintf(f, "<node name=\"job/%lu\"/>", (unsigned long) j->id); | |
167 | ||
168 | fputs("</node>\n", f); | |
169 | ||
170 | if (ferror(f)) { | |
171 | fclose(f); | |
172 | free(introspection); | |
173 | goto oom; | |
174 | } | |
175 | ||
176 | fclose(f); | |
177 | ||
178 | if (!introspection) | |
179 | goto oom; | |
180 | ||
181 | if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &introspection, DBUS_TYPE_INVALID)) { | |
182 | free(introspection); | |
183 | goto oom; | |
184 | } | |
185 | ||
186 | free(introspection); | |
187 | ||
c6a818c8 | 188 | if (!bus_maybe_send_reply(connection, message, reply)) |
2cccbca4 LP |
189 | goto oom; |
190 | ||
2cccbca4 LP |
191 | return DBUS_HANDLER_RESULT_HANDLED; |
192 | } | |
193 | ||
194 | return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; | |
195 | } | |
196 | ||
cad45ba1 LP |
197 | r = manager_get_job_from_dbus_path(m, dbus_message_get_path(message), &j); |
198 | if (r == -ENOMEM) | |
199 | goto oom; | |
200 | if (r == -ENOENT) { | |
201 | DBusError e; | |
86fbf370 | 202 | |
cad45ba1 LP |
203 | dbus_error_init(&e); |
204 | dbus_set_error_const(&e, DBUS_ERROR_UNKNOWN_OBJECT, "Unknown job"); | |
205 | return bus_send_error_reply(connection, message, &e, r); | |
86fbf370 | 206 | } |
cad45ba1 LP |
207 | if (r < 0) |
208 | return bus_send_error_reply(connection, message, NULL, r); | |
86fbf370 | 209 | |
5e8d1c9a | 210 | return bus_job_message_dispatch(j, connection, message); |
2cccbca4 LP |
211 | |
212 | oom: | |
2cccbca4 | 213 | return DBUS_HANDLER_RESULT_NEED_MEMORY; |
ea430986 LP |
214 | } |
215 | ||
216 | const DBusObjectPathVTable bus_job_vtable = { | |
217 | .message_function = bus_job_message_handler | |
218 | }; | |
c1e1601e | 219 | |
97e6a119 | 220 | static int job_send_message(Job *j, DBusMessage* (*new_message)(Job *j)) { |
84286536 | 221 | _cleanup_dbus_message_unref_ DBusMessage *m = NULL; |
a567261a LP |
222 | int r; |
223 | ||
224 | assert(j); | |
97e6a119 | 225 | assert(new_message); |
a567261a | 226 | |
39a18c60 | 227 | if (bus_has_subscriber(j->manager) || j->forgot_bus_clients) { |
97e6a119 MS |
228 | m = new_message(j); |
229 | if (!m) | |
84286536 LP |
230 | return -ENOMEM; |
231 | ||
97e6a119 | 232 | r = bus_broadcast(j->manager, m); |
97e6a119 | 233 | if (r < 0) |
a567261a LP |
234 | return r; |
235 | ||
97e6a119 | 236 | } else { |
a567261a | 237 | /* If nobody is subscribed, we just send the message |
97e6a119 MS |
238 | * to the client(s) which created the job */ |
239 | JobBusClient *cl; | |
240 | assert(j->bus_client_list); | |
84286536 | 241 | |
97e6a119 MS |
242 | LIST_FOREACH(client, cl, j->bus_client_list) { |
243 | assert(cl->bus); | |
244 | ||
245 | m = new_message(j); | |
246 | if (!m) | |
84286536 | 247 | return -ENOMEM; |
a567261a | 248 | |
97e6a119 | 249 | if (!dbus_message_set_destination(m, cl->name)) |
84286536 | 250 | return -ENOMEM; |
a567261a | 251 | |
97e6a119 | 252 | if (!dbus_connection_send(cl->bus, m, NULL)) |
84286536 | 253 | return -ENOMEM; |
a567261a | 254 | |
97e6a119 MS |
255 | dbus_message_unref(m); |
256 | m = NULL; | |
257 | } | |
a567261a LP |
258 | } |
259 | ||
260 | return 0; | |
261 | } | |
262 | ||
97e6a119 | 263 | static DBusMessage* new_change_signal_message(Job *j) { |
1508e858 LP |
264 | _cleanup_free_ char *p = NULL; |
265 | DBusMessage *m; | |
c1e1601e | 266 | |
97e6a119 MS |
267 | p = job_dbus_path(j); |
268 | if (!p) | |
1508e858 | 269 | return NULL; |
c1e1601e LP |
270 | |
271 | if (j->sent_dbus_new_signal) { | |
c4e2ceae | 272 | /* Send a properties changed signal */ |
97e6a119 MS |
273 | m = bus_properties_changed_new(p, "org.freedesktop.systemd1.Job", INVALIDATING_PROPERTIES); |
274 | if (!m) | |
1508e858 | 275 | return NULL; |
c4e2ceae | 276 | |
c1e1601e LP |
277 | } else { |
278 | /* Send a new signal */ | |
279 | ||
97e6a119 MS |
280 | m = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "JobNew"); |
281 | if (!m) | |
1508e858 | 282 | return NULL; |
c1e1601e LP |
283 | |
284 | if (!dbus_message_append_args(m, | |
285 | DBUS_TYPE_UINT32, &j->id, | |
286 | DBUS_TYPE_OBJECT_PATH, &p, | |
06dab8e1 | 287 | DBUS_TYPE_STRING, &j->unit->id, |
1508e858 LP |
288 | DBUS_TYPE_INVALID)) { |
289 | dbus_message_unref(m); | |
290 | return NULL; | |
291 | } | |
c1e1601e LP |
292 | } |
293 | ||
97e6a119 | 294 | return m; |
c1e1601e LP |
295 | } |
296 | ||
97e6a119 | 297 | static DBusMessage* new_removed_signal_message(Job *j) { |
1508e858 LP |
298 | _cleanup_free_ char *p = NULL; |
299 | DBusMessage *m; | |
5d44db4a | 300 | const char *r; |
c1e1601e | 301 | |
97e6a119 MS |
302 | p = job_dbus_path(j); |
303 | if (!p) | |
1508e858 | 304 | return NULL; |
c1e1601e | 305 | |
97e6a119 MS |
306 | m = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "JobRemoved"); |
307 | if (!m) | |
1508e858 | 308 | return NULL; |
c1e1601e | 309 | |
5d44db4a LP |
310 | r = job_result_to_string(j->result); |
311 | ||
c1e1601e LP |
312 | if (!dbus_message_append_args(m, |
313 | DBUS_TYPE_UINT32, &j->id, | |
314 | DBUS_TYPE_OBJECT_PATH, &p, | |
06dab8e1 | 315 | DBUS_TYPE_STRING, &j->unit->id, |
5d44db4a | 316 | DBUS_TYPE_STRING, &r, |
1508e858 LP |
317 | DBUS_TYPE_INVALID)) { |
318 | dbus_message_unref(m); | |
319 | return NULL; | |
320 | } | |
c1e1601e | 321 | |
97e6a119 | 322 | return m; |
97e6a119 MS |
323 | } |
324 | ||
325 | void bus_job_send_change_signal(Job *j) { | |
326 | assert(j); | |
327 | ||
328 | if (j->in_dbus_queue) { | |
329 | LIST_REMOVE(Job, dbus_queue, j->manager->dbus_job_queue, j); | |
330 | j->in_dbus_queue = false; | |
331 | } | |
332 | ||
39a18c60 | 333 | if (!bus_has_subscriber(j->manager) && !j->bus_client_list && !j->forgot_bus_clients) { |
97e6a119 MS |
334 | j->sent_dbus_new_signal = true; |
335 | return; | |
336 | } | |
337 | ||
338 | if (job_send_message(j, new_change_signal_message) < 0) | |
339 | goto oom; | |
340 | ||
341 | j->sent_dbus_new_signal = true; | |
c1e1601e LP |
342 | |
343 | return; | |
344 | ||
345 | oom: | |
97e6a119 MS |
346 | log_error("Failed to allocate job change signal."); |
347 | } | |
c1e1601e | 348 | |
97e6a119 MS |
349 | void bus_job_send_removed_signal(Job *j) { |
350 | assert(j); | |
c1e1601e | 351 | |
39a18c60 | 352 | if (!bus_has_subscriber(j->manager) && !j->bus_client_list && !j->forgot_bus_clients) |
97e6a119 MS |
353 | return; |
354 | ||
355 | if (!j->sent_dbus_new_signal) | |
356 | bus_job_send_change_signal(j); | |
357 | ||
358 | if (job_send_message(j, new_removed_signal_message) < 0) | |
359 | goto oom; | |
360 | ||
361 | return; | |
362 | ||
363 | oom: | |
c1e1601e LP |
364 | log_error("Failed to allocate job remove signal."); |
365 | } |