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1 /***
2 This file is part of systemd.
3
4 Copyright 2010 Lennart Poettering
5
6 systemd is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
10
11 systemd is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public License
17 along with systemd; If not, see <http://www.gnu.org/licenses/>.
18 ***/
19
20 #include "alloc-util.h"
21 #include "async.h"
22 #include "bus-util.h"
23 #include "dbus-cgroup.h"
24 #include "dbus-execute.h"
25 #include "dbus-kill.h"
26 #include "dbus-service.h"
27 #include "fd-util.h"
28 #include "fileio.h"
29 #include "path-util.h"
30 #include "service.h"
31 #include "string-util.h"
32 #include "strv.h"
33 #include "unit.h"
34
35 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_type, service_type, ServiceType);
36 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_result, service_result, ServiceResult);
37 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_restart, service_restart, ServiceRestart);
38 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_notify_access, notify_access, NotifyAccess);
39 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_failure_action, failure_action, FailureAction);
40
41 const sd_bus_vtable bus_service_vtable[] = {
42 SD_BUS_VTABLE_START(0),
43 SD_BUS_PROPERTY("Type", "s", property_get_type, offsetof(Service, type), SD_BUS_VTABLE_PROPERTY_CONST),
44 SD_BUS_PROPERTY("Restart", "s", property_get_restart, offsetof(Service, restart), SD_BUS_VTABLE_PROPERTY_CONST),
45 SD_BUS_PROPERTY("PIDFile", "s", NULL, offsetof(Service, pid_file), SD_BUS_VTABLE_PROPERTY_CONST),
46 SD_BUS_PROPERTY("NotifyAccess", "s", property_get_notify_access, offsetof(Service, notify_access), SD_BUS_VTABLE_PROPERTY_CONST),
47 SD_BUS_PROPERTY("RestartUSec", "t", bus_property_get_usec, offsetof(Service, restart_usec), SD_BUS_VTABLE_PROPERTY_CONST),
48 SD_BUS_PROPERTY("TimeoutStartUSec", "t", bus_property_get_usec, offsetof(Service, timeout_start_usec), SD_BUS_VTABLE_PROPERTY_CONST),
49 SD_BUS_PROPERTY("TimeoutStopUSec", "t", bus_property_get_usec, offsetof(Service, timeout_stop_usec), SD_BUS_VTABLE_PROPERTY_CONST),
50 SD_BUS_PROPERTY("RuntimeMaxUSec", "t", bus_property_get_usec, offsetof(Service, runtime_max_usec), SD_BUS_VTABLE_PROPERTY_CONST),
51 SD_BUS_PROPERTY("WatchdogUSec", "t", bus_property_get_usec, offsetof(Service, watchdog_usec), SD_BUS_VTABLE_PROPERTY_CONST),
52 BUS_PROPERTY_DUAL_TIMESTAMP("WatchdogTimestamp", offsetof(Service, watchdog_timestamp), 0),
53 /* The following four are obsolete, and thus marked hidden here. They moved into the Unit interface */
54 SD_BUS_PROPERTY("StartLimitInterval", "t", bus_property_get_usec, offsetof(Unit, start_limit.interval), SD_BUS_VTABLE_PROPERTY_CONST|SD_BUS_VTABLE_HIDDEN),
55 SD_BUS_PROPERTY("StartLimitBurst", "u", bus_property_get_unsigned, offsetof(Unit, start_limit.burst), SD_BUS_VTABLE_PROPERTY_CONST|SD_BUS_VTABLE_HIDDEN),
56 SD_BUS_PROPERTY("StartLimitAction", "s", property_get_failure_action, offsetof(Unit, start_limit_action), SD_BUS_VTABLE_PROPERTY_CONST|SD_BUS_VTABLE_HIDDEN),
57 SD_BUS_PROPERTY("RebootArgument", "s", NULL, offsetof(Unit, reboot_arg), SD_BUS_VTABLE_PROPERTY_CONST|SD_BUS_VTABLE_HIDDEN),
58 SD_BUS_PROPERTY("FailureAction", "s", property_get_failure_action, offsetof(Service, failure_action), SD_BUS_VTABLE_PROPERTY_CONST),
59 SD_BUS_PROPERTY("PermissionsStartOnly", "b", bus_property_get_bool, offsetof(Service, permissions_start_only), SD_BUS_VTABLE_PROPERTY_CONST),
60 SD_BUS_PROPERTY("RootDirectoryStartOnly", "b", bus_property_get_bool, offsetof(Service, root_directory_start_only), SD_BUS_VTABLE_PROPERTY_CONST),
61 SD_BUS_PROPERTY("RemainAfterExit", "b", bus_property_get_bool, offsetof(Service, remain_after_exit), SD_BUS_VTABLE_PROPERTY_CONST),
62 SD_BUS_PROPERTY("GuessMainPID", "b", bus_property_get_bool, offsetof(Service, guess_main_pid), SD_BUS_VTABLE_PROPERTY_CONST),
63 SD_BUS_PROPERTY("MainPID", "u", bus_property_get_pid, offsetof(Service, main_pid), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
64 SD_BUS_PROPERTY("ControlPID", "u", bus_property_get_pid, offsetof(Service, control_pid), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
65 SD_BUS_PROPERTY("BusName", "s", NULL, offsetof(Service, bus_name), SD_BUS_VTABLE_PROPERTY_CONST),
66 SD_BUS_PROPERTY("FileDescriptorStoreMax", "u", bus_property_get_unsigned, offsetof(Service, n_fd_store_max), SD_BUS_VTABLE_PROPERTY_CONST),
67 SD_BUS_PROPERTY("NFileDescriptorStore", "u", bus_property_get_unsigned, offsetof(Service, n_fd_store), 0),
68 SD_BUS_PROPERTY("StatusText", "s", NULL, offsetof(Service, status_text), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
69 SD_BUS_PROPERTY("StatusErrno", "i", NULL, offsetof(Service, status_errno), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
70 SD_BUS_PROPERTY("Result", "s", property_get_result, offsetof(Service, result), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
71 SD_BUS_PROPERTY("USBFunctionDescriptors", "s", NULL, offsetof(Service, usb_function_descriptors), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
72 SD_BUS_PROPERTY("USBFunctionStrings", "s", NULL, offsetof(Service, usb_function_strings), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
73 BUS_EXEC_STATUS_VTABLE("ExecMain", offsetof(Service, main_exec_status), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
74 BUS_EXEC_COMMAND_LIST_VTABLE("ExecStartPre", offsetof(Service, exec_command[SERVICE_EXEC_START_PRE]), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
75 BUS_EXEC_COMMAND_LIST_VTABLE("ExecStart", offsetof(Service, exec_command[SERVICE_EXEC_START]), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
76 BUS_EXEC_COMMAND_LIST_VTABLE("ExecStartPost", offsetof(Service, exec_command[SERVICE_EXEC_START_POST]), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
77 BUS_EXEC_COMMAND_LIST_VTABLE("ExecReload", offsetof(Service, exec_command[SERVICE_EXEC_RELOAD]), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
78 BUS_EXEC_COMMAND_LIST_VTABLE("ExecStop", offsetof(Service, exec_command[SERVICE_EXEC_STOP]), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
79 BUS_EXEC_COMMAND_LIST_VTABLE("ExecStopPost", offsetof(Service, exec_command[SERVICE_EXEC_STOP_POST]), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
80 SD_BUS_VTABLE_END
81 };
82
83 static int bus_service_set_transient_property(
84 Service *s,
85 const char *name,
86 sd_bus_message *message,
87 UnitSetPropertiesMode mode,
88 sd_bus_error *error) {
89
90 int r;
91
92 assert(s);
93 assert(name);
94 assert(message);
95
96 if (streq(name, "RemainAfterExit")) {
97 int b;
98
99 r = sd_bus_message_read(message, "b", &b);
100 if (r < 0)
101 return r;
102
103 if (mode != UNIT_CHECK) {
104 s->remain_after_exit = b;
105 unit_write_drop_in_private_format(UNIT(s), mode, name, "RemainAfterExit=%s\n", yes_no(b));
106 }
107
108 return 1;
109
110 } else if (streq(name, "Type")) {
111 const char *t;
112 ServiceType k;
113
114 r = sd_bus_message_read(message, "s", &t);
115 if (r < 0)
116 return r;
117
118 k = service_type_from_string(t);
119 if (k < 0)
120 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid service type %s", t);
121
122 if (mode != UNIT_CHECK) {
123 s->type = k;
124 unit_write_drop_in_private_format(UNIT(s), mode, name, "Type=%s\n", service_type_to_string(s->type));
125 }
126
127 return 1;
128 } else if (streq(name, "RuntimeMaxUSec")) {
129 usec_t u;
130
131 r = sd_bus_message_read(message, "t", &u);
132 if (r < 0)
133 return r;
134
135 if (mode != UNIT_CHECK) {
136 s->runtime_max_usec = u;
137 unit_write_drop_in_private_format(UNIT(s), mode, name, "RuntimeMaxSec=" USEC_FMT "us\n", u);
138 }
139
140 return 1;
141
142 } else if (STR_IN_SET(name,
143 "StandardInputFileDescriptor",
144 "StandardOutputFileDescriptor",
145 "StandardErrorFileDescriptor")) {
146 int fd;
147
148 r = sd_bus_message_read(message, "h", &fd);
149 if (r < 0)
150 return r;
151
152 if (mode != UNIT_CHECK) {
153 int copy;
154
155 copy = fcntl(fd, F_DUPFD_CLOEXEC, 3);
156 if (copy < 0)
157 return -errno;
158
159 if (streq(name, "StandardInputFileDescriptor")) {
160 asynchronous_close(s->stdin_fd);
161 s->stdin_fd = copy;
162 } else if (streq(name, "StandardOutputFileDescriptor")) {
163 asynchronous_close(s->stdout_fd);
164 s->stdout_fd = copy;
165 } else {
166 asynchronous_close(s->stderr_fd);
167 s->stderr_fd = copy;
168 }
169
170 s->exec_context.stdio_as_fds = true;
171 }
172
173 return 1;
174
175 } else if (streq(name, "ExecStart")) {
176 unsigned n = 0;
177
178 r = sd_bus_message_enter_container(message, 'a', "(sasb)");
179 if (r < 0)
180 return r;
181
182 while ((r = sd_bus_message_enter_container(message, 'r', "sasb")) > 0) {
183 _cleanup_strv_free_ char **argv = NULL;
184 const char *path;
185 int b;
186
187 r = sd_bus_message_read(message, "s", &path);
188 if (r < 0)
189 return r;
190
191 if (!path_is_absolute(path))
192 return sd_bus_error_set_errnof(error, EINVAL, "Path %s is not absolute.", path);
193
194 r = sd_bus_message_read_strv(message, &argv);
195 if (r < 0)
196 return r;
197
198 r = sd_bus_message_read(message, "b", &b);
199 if (r < 0)
200 return r;
201
202 r = sd_bus_message_exit_container(message);
203 if (r < 0)
204 return r;
205
206 if (mode != UNIT_CHECK) {
207 ExecCommand *c;
208
209 c = new0(ExecCommand, 1);
210 if (!c)
211 return -ENOMEM;
212
213 c->path = strdup(path);
214 if (!c->path) {
215 free(c);
216 return -ENOMEM;
217 }
218
219 c->argv = argv;
220 argv = NULL;
221
222 c->ignore = b;
223
224 path_kill_slashes(c->path);
225 exec_command_append_list(&s->exec_command[SERVICE_EXEC_START], c);
226 }
227
228 n++;
229 }
230
231 if (r < 0)
232 return r;
233
234 r = sd_bus_message_exit_container(message);
235 if (r < 0)
236 return r;
237
238 if (mode != UNIT_CHECK) {
239 _cleanup_free_ char *buf = NULL;
240 _cleanup_fclose_ FILE *f = NULL;
241 ExecCommand *c;
242 size_t size = 0;
243
244 if (n == 0)
245 s->exec_command[SERVICE_EXEC_START] = exec_command_free_list(s->exec_command[SERVICE_EXEC_START]);
246
247 f = open_memstream(&buf, &size);
248 if (!f)
249 return -ENOMEM;
250
251 fputs("ExecStart=\n", f);
252
253 LIST_FOREACH(command, c, s->exec_command[SERVICE_EXEC_START]) {
254 _cleanup_free_ char *a;
255
256 a = strv_join_quoted(c->argv);
257 if (!a)
258 return -ENOMEM;
259
260 fprintf(f, "ExecStart=%s@%s %s\n",
261 c->ignore ? "-" : "",
262 c->path,
263 a);
264 }
265
266 r = fflush_and_check(f);
267 if (r < 0)
268 return r;
269 unit_write_drop_in_private(UNIT(s), mode, name, buf);
270 }
271
272 return 1;
273 }
274
275 return 0;
276 }
277
278 int bus_service_set_property(
279 Unit *u,
280 const char *name,
281 sd_bus_message *message,
282 UnitSetPropertiesMode mode,
283 sd_bus_error *error) {
284
285 Service *s = SERVICE(u);
286 int r;
287
288 assert(s);
289 assert(name);
290 assert(message);
291
292 r = bus_cgroup_set_property(u, &s->cgroup_context, name, message, mode, error);
293 if (r != 0)
294 return r;
295
296 if (u->transient && u->load_state == UNIT_STUB) {
297 /* This is a transient unit, let's load a little more */
298
299 r = bus_service_set_transient_property(s, name, message, mode, error);
300 if (r != 0)
301 return r;
302
303 r = bus_exec_context_set_transient_property(u, &s->exec_context, name, message, mode, error);
304 if (r != 0)
305 return r;
306
307 r = bus_kill_context_set_transient_property(u, &s->kill_context, name, message, mode, error);
308 if (r != 0)
309 return r;
310 }
311
312 return 0;
313 }
314
315 int bus_service_commit_properties(Unit *u) {
316 assert(u);
317
318 unit_update_cgroup_members_masks(u);
319 unit_realize_cgroup(u);
320
321 return 0;
322 }