chiark / gitweb /
bus: decorate the various object vtables with SD_BUS_VTABLE_PROPERTY_CONST where...
[elogind.git] / src / core / dbus-job.c
1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
2
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 Lesser General Public License as published by
10   the Free Software Foundation; either version 2.1 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   Lesser General Public License for more details.
17
18   You should have received a copy of the GNU Lesser General Public License
19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
20 ***/
21
22 #include "log.h"
23 #include "sd-bus.h"
24 #include "selinux-access.h"
25 #include "job.h"
26 #include "dbus-job.h"
27 #include "dbus-client-track.h"
28
29 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_type, job_type, JobType);
30 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_state, job_state, JobState);
31
32 static int property_get_unit(
33                 sd_bus *bus,
34                 const char *path,
35                 const char *interface,
36                 const char *property,
37                 sd_bus_message *reply,
38                 void *userdata,
39                 sd_bus_error *error) {
40
41         _cleanup_free_ char *p = NULL;
42         Job *j = userdata;
43
44         assert(bus);
45         assert(reply);
46         assert(j);
47
48         p = unit_dbus_path(j->unit);
49         if (!p)
50                 return -ENOMEM;
51
52         return sd_bus_message_append(reply, "(so)", j->unit->id, p);
53 }
54
55 static int method_cancel(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
56         Job *j = userdata;
57         int r;
58
59         assert(bus);
60         assert(message);
61         assert(j);
62
63         r = selinux_unit_access_check(j->unit, bus, message, "stop", error);
64         if (r < 0)
65                 return r;
66
67         job_finish_and_invalidate(j, JOB_CANCELED, true);
68
69         return sd_bus_reply_method_return(message, NULL);
70 }
71
72 const sd_bus_vtable bus_job_vtable[] = {
73         SD_BUS_VTABLE_START(0),
74         SD_BUS_METHOD("Cancel", NULL, NULL, method_cancel, 0),
75         SD_BUS_PROPERTY("Id", "u", NULL, offsetof(Job, id), SD_BUS_VTABLE_PROPERTY_CONST),
76         SD_BUS_PROPERTY("Unit", "(so)", property_get_unit, 0, SD_BUS_VTABLE_PROPERTY_CONST),
77         SD_BUS_PROPERTY("JobType", "s", property_get_type, offsetof(Job, type), SD_BUS_VTABLE_PROPERTY_CONST),
78         SD_BUS_PROPERTY("State", "s", property_get_state, offsetof(Job, state), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
79         SD_BUS_VTABLE_END
80 };
81
82 static int foreach_client(Job *j, int (*send_message)(sd_bus *bus, const char *name, Job *j)) {
83         BusTrackedClient *one_destination = NULL;
84         Iterator i;
85         sd_bus *b;
86         unsigned n, m;
87         int r, ret;
88
89         assert(j);
90         assert(send_message);
91
92         n = set_size(j->manager->subscribed);
93         m = set_size(j->subscribed);
94
95         if (n <= 0 && m <= 0)
96                 return 0;
97
98         if (n == 1 && m == 0)
99                 one_destination = set_first(j->manager->subscribed);
100         else if (n == 0 && m == 1)
101                 one_destination = set_first(j->subscribed);
102         else
103                 one_destination = NULL;
104
105         if (one_destination)
106                 return send_message(one_destination->bus, isempty(one_destination->name) ? NULL : one_destination->name, j);
107
108         ret = 0;
109
110         /* Send to everybody */
111         SET_FOREACH(b, j->manager->private_buses, i) {
112                 r = send_message(b, NULL, j);
113                 if (r < 0)
114                         ret = r;
115         }
116
117         if (j->manager->api_bus) {
118                 r = send_message(j->manager->api_bus, NULL, j);
119                 if (r < 0)
120                         ret = r;
121         }
122
123         return ret;
124 }
125
126 static int send_new_signal(sd_bus *bus, const char *destination, Job *j) {
127         _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
128         _cleanup_free_ char *p = NULL;
129         int r;
130
131         assert(bus);
132         assert(j);
133
134         p = job_dbus_path(j);
135         if (!p)
136                 return -ENOMEM;
137
138         r = sd_bus_message_new_signal(
139                         bus,
140                         "/org/freedesktop/systemd1",
141                         "org.freedesktop.systemd1.Manager",
142                         "JobNew",
143                         &m);
144         if (r < 0)
145                 return r;
146
147         r = sd_bus_message_append(m, "uos", j->id, p, j->unit->id);
148         if (r < 0)
149                 return r;
150
151         return sd_bus_send_to(bus, m, destination, NULL);
152 }
153
154 static int send_changed_signal(sd_bus *bus, const char *destination, Job *j) {
155         _cleanup_free_ char *p = NULL;
156
157         assert(bus);
158         assert(j);
159
160         p = job_dbus_path(j);
161         if (!p)
162                 return -ENOMEM;
163
164         return sd_bus_emit_properties_changed(bus, p, "org.freedesktop.systemd1.Job", "State", NULL);
165 }
166
167 void bus_job_send_change_signal(Job *j) {
168         int r;
169
170         assert(j);
171
172         if (j->in_dbus_queue) {
173                 LIST_REMOVE(dbus_queue, j->manager->dbus_job_queue, j);
174                 j->in_dbus_queue = false;
175         }
176
177         r = foreach_client(j, j->sent_dbus_new_signal ? send_changed_signal : send_new_signal);
178         if (r < 0)
179                 log_debug("Failed to send job change signal for %u: %s", j->id, strerror(-r));
180
181         j->sent_dbus_new_signal = true;
182 }
183
184 static int send_removed_signal(sd_bus *bus, const char *destination, Job *j) {
185         _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
186         _cleanup_free_ char *p = NULL;
187         int r;
188
189         assert(bus);
190         assert(j);
191
192         p = job_dbus_path(j);
193         if (!p)
194                 return -ENOMEM;
195
196
197         r = sd_bus_message_new_signal(
198                         bus,
199                         "/org/freedesktop/systemd1",
200                         "org.freedesktop.systemd1.Manager",
201                         "JobRemoved",
202                         &m);
203         if (r < 0)
204                 return r;
205
206         r = sd_bus_message_append(m, "uoss", j->id, p, j->unit->id, job_result_to_string(j->result));
207         if (r < 0)
208                 return r;
209
210         return sd_bus_send_to(bus, m, destination, NULL);
211 }
212
213 void bus_job_send_removed_signal(Job *j) {
214         int r;
215
216         assert(j);
217
218         if (!j->sent_dbus_new_signal)
219                 bus_job_send_change_signal(j);
220
221         r = foreach_client(j, send_removed_signal);
222         if (r < 0)
223                 log_debug("Failed to send job remove signal for %u: %s", j->id, strerror(-r));
224 }