Line data Source code
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.h"
28 :
29 0 : static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_type, job_type, JobType);
30 0 : static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_state, job_state, JobState);
31 :
32 0 : 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 0 : _cleanup_free_ char *p = NULL;
42 0 : Job *j = userdata;
43 :
44 0 : assert(bus);
45 0 : assert(reply);
46 0 : assert(j);
47 :
48 0 : p = unit_dbus_path(j->unit);
49 0 : if (!p)
50 0 : return -ENOMEM;
51 :
52 0 : return sd_bus_message_append(reply, "(so)", j->unit->id, p);
53 : }
54 :
55 0 : int bus_job_method_cancel(sd_bus_message *message, void *userdata, sd_bus_error *error) {
56 0 : Job *j = userdata;
57 : int r;
58 :
59 0 : assert(message);
60 0 : assert(j);
61 :
62 0 : r = mac_selinux_unit_access_check(j->unit, message, "stop", error);
63 0 : if (r < 0)
64 0 : return r;
65 :
66 : /* Access is granted to the job owner */
67 0 : if (!sd_bus_track_contains(j->clients, sd_bus_message_get_sender(message))) {
68 :
69 : /* And for everybody else consult PolicyKit */
70 0 : r = bus_verify_manage_units_async(j->unit->manager, message, error);
71 0 : if (r < 0)
72 0 : return r;
73 0 : if (r == 0)
74 0 : return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
75 : }
76 :
77 0 : job_finish_and_invalidate(j, JOB_CANCELED, true);
78 :
79 0 : return sd_bus_reply_method_return(message, NULL);
80 : }
81 :
82 : const sd_bus_vtable bus_job_vtable[] = {
83 : SD_BUS_VTABLE_START(0),
84 : SD_BUS_METHOD("Cancel", NULL, NULL, bus_job_method_cancel, SD_BUS_VTABLE_UNPRIVILEGED),
85 : SD_BUS_PROPERTY("Id", "u", NULL, offsetof(Job, id), SD_BUS_VTABLE_PROPERTY_CONST),
86 : SD_BUS_PROPERTY("Unit", "(so)", property_get_unit, 0, SD_BUS_VTABLE_PROPERTY_CONST),
87 : SD_BUS_PROPERTY("JobType", "s", property_get_type, offsetof(Job, type), SD_BUS_VTABLE_PROPERTY_CONST),
88 : SD_BUS_PROPERTY("State", "s", property_get_state, offsetof(Job, state), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
89 : SD_BUS_VTABLE_END
90 : };
91 :
92 0 : static int send_new_signal(sd_bus *bus, void *userdata) {
93 0 : _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
94 0 : _cleanup_free_ char *p = NULL;
95 0 : Job *j = userdata;
96 : int r;
97 :
98 0 : assert(bus);
99 0 : assert(j);
100 :
101 0 : p = job_dbus_path(j);
102 0 : if (!p)
103 0 : return -ENOMEM;
104 :
105 0 : r = sd_bus_message_new_signal(
106 : bus,
107 : &m,
108 : "/org/freedesktop/systemd1",
109 : "org.freedesktop.systemd1.Manager",
110 : "JobNew");
111 0 : if (r < 0)
112 0 : return r;
113 :
114 0 : r = sd_bus_message_append(m, "uos", j->id, p, j->unit->id);
115 0 : if (r < 0)
116 0 : return r;
117 :
118 0 : return sd_bus_send(bus, m, NULL);
119 : }
120 :
121 0 : static int send_changed_signal(sd_bus *bus, void *userdata) {
122 0 : _cleanup_free_ char *p = NULL;
123 0 : Job *j = userdata;
124 :
125 0 : assert(bus);
126 0 : assert(j);
127 :
128 0 : p = job_dbus_path(j);
129 0 : if (!p)
130 0 : return -ENOMEM;
131 :
132 0 : return sd_bus_emit_properties_changed(bus, p, "org.freedesktop.systemd1.Job", "State", NULL);
133 : }
134 :
135 63 : void bus_job_send_change_signal(Job *j) {
136 : int r;
137 :
138 63 : assert(j);
139 :
140 63 : if (j->in_dbus_queue) {
141 63 : LIST_REMOVE(dbus_queue, j->manager->dbus_job_queue, j);
142 63 : j->in_dbus_queue = false;
143 : }
144 :
145 63 : r = bus_foreach_bus(j->manager, j->clients, j->sent_dbus_new_signal ? send_changed_signal : send_new_signal, j);
146 63 : if (r < 0)
147 0 : log_debug_errno(r, "Failed to send job change signal for %u: %m", j->id);
148 :
149 63 : j->sent_dbus_new_signal = true;
150 63 : }
151 :
152 0 : static int send_removed_signal(sd_bus *bus, void *userdata) {
153 0 : _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
154 0 : _cleanup_free_ char *p = NULL;
155 0 : Job *j = userdata;
156 : int r;
157 :
158 0 : assert(bus);
159 0 : assert(j);
160 :
161 0 : p = job_dbus_path(j);
162 0 : if (!p)
163 0 : return -ENOMEM;
164 :
165 0 : r = sd_bus_message_new_signal(
166 : bus,
167 : &m,
168 : "/org/freedesktop/systemd1",
169 : "org.freedesktop.systemd1.Manager",
170 : "JobRemoved");
171 0 : if (r < 0)
172 0 : return r;
173 :
174 0 : r = sd_bus_message_append(m, "uoss", j->id, p, j->unit->id, job_result_to_string(j->result));
175 0 : if (r < 0)
176 0 : return r;
177 :
178 0 : return sd_bus_send(bus, m, NULL);
179 : }
180 :
181 63 : void bus_job_send_removed_signal(Job *j) {
182 : int r;
183 :
184 63 : assert(j);
185 :
186 63 : if (!j->sent_dbus_new_signal)
187 63 : bus_job_send_change_signal(j);
188 :
189 63 : r = bus_foreach_bus(j->manager, j->clients, send_removed_signal, j);
190 63 : if (r < 0)
191 0 : log_debug_errno(r, "Failed to send job remove signal for %u: %m", j->id);
192 63 : }
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