2 This file is part of systemd.
4 Copyright 2013 Daniel Mack
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.
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.
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/>.
28 #include <sys/socket.h>
30 #include <sys/timex.h>
31 #include <sys/utsname.h>
36 #include "bus-internal.h"
37 #include "sd-daemon.h"
39 #include "event-util.h"
41 #include "bus-error.h"
42 #include "bus-message.h"
43 #include "bus-kernel.h"
44 #include "socket-util.h"
52 #include "unit-name.h"
57 * AddMatch / RemoveMatch
60 static int driver_add_match(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *error) {
65 r = sd_bus_message_read(m, "s", &arg0);
71 return sd_bus_reply_method_return(m, NULL);
74 static int driver_remove_match(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *error) {
78 r = sd_bus_message_read(m, "s", &arg0);
84 return sd_bus_reply_method_return(m, NULL);
87 static int driver_get_security_ctx(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *error) {
88 _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
89 _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
93 r = sd_bus_message_read(m, "s", &arg0);
97 assert_return(service_name_is_valid(arg0), -EINVAL);
99 r = sd_bus_get_owner(bus, arg0, SD_BUS_CREDS_SELINUX_CONTEXT, &creds);
103 r = sd_bus_message_new_method_return(m, &reply);
107 r = sd_bus_message_append_array(reply, 'y', creds->label, strlen(creds->label));
111 return sd_bus_send(bus, reply, NULL);
114 static int driver_get_pid(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *error) {
115 _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
119 r = sd_bus_message_read(m, "s", &arg0);
123 assert_return(service_name_is_valid(arg0), -EINVAL);
125 r = sd_bus_get_owner(bus, arg0, SD_BUS_CREDS_PID, &creds);
129 return sd_bus_reply_method_return(m, "u", creds->pid);
132 static int driver_get_user(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *error) {
133 _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
137 r = sd_bus_message_read(m, "s", &arg0);
141 assert_return(service_name_is_valid(arg0), -EINVAL);
143 r = sd_bus_get_owner(bus, arg0, SD_BUS_CREDS_UID, &creds);
147 return sd_bus_reply_method_return(m, "u", creds->uid);
150 static int driver_get_id(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *error) {
151 sd_id128_t server_id;
152 char buf[SD_ID128_STRING_MAX];
155 r = sd_bus_get_server_id(bus, &server_id);
159 return sd_bus_reply_method_return(m, "s", sd_id128_to_string(server_id, buf));
162 static int driver_get_name_owner(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *error) {
163 _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
167 r = sd_bus_message_read(m, "s", &arg0);
171 assert_return(service_name_is_valid(arg0), -EINVAL);
173 r = sd_bus_get_owner(bus, arg0, SD_BUS_CREDS_UNIQUE_NAME, &creds);
177 return sd_bus_reply_method_return(m, "s", creds->unique_name);
180 static int driver_hello(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *error) {
181 return sd_bus_reply_method_return(m, "s", m->sender);
184 static int return_strv(sd_bus *bus, sd_bus_message *m, char **l) {
185 _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
188 r = sd_bus_message_new_method_return(m, &reply);
192 r = sd_bus_message_append_strv(reply, l);
196 return sd_bus_send(bus, reply, NULL);
199 static int driver_list_names(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *error) {
200 _cleanup_strv_free_ char **names = NULL;
203 r = sd_bus_list_names(bus, &names, NULL);
207 return return_strv(bus, m, names);
210 static int driver_list_activatable_names(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *error) {
211 _cleanup_strv_free_ char **names = NULL;
214 r = sd_bus_list_names(bus, NULL, &names);
218 return return_strv(bus, m, names);
221 static int driver_list_queued_owners(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *error) {
222 struct kdbus_cmd_name_list cmd = {};
223 struct kdbus_name_list *name_list;
224 struct kdbus_cmd_name *name;
225 _cleanup_strv_free_ char **owners = NULL;
229 r = sd_bus_message_read(m, "s", &arg0);
233 assert_return(service_name_is_valid(arg0), -EINVAL);
235 cmd.flags = KDBUS_NAME_LIST_QUEUED;
237 r = ioctl(bus->input_fd, KDBUS_CMD_NAME_LIST, &cmd);
241 name_list = (struct kdbus_name_list *) ((uint8_t *) bus->kdbus_buffer + cmd.offset);
243 KDBUS_ITEM_FOREACH(name, name_list, names) {
246 if (name->size <= sizeof(*name))
249 if (!streq(name->name, arg0))
252 if (asprintf(&n, ":1.%llu", (unsigned long long) name->id) < 0)
255 r = strv_push(&owners, n);
262 r = ioctl(bus->input_fd, KDBUS_CMD_FREE, &cmd.offset);
266 return return_strv(bus, m, owners);
269 static int driver_name_has_owner(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *error) {
273 r = sd_bus_message_read(m, "s", &arg0);
277 assert_return(service_name_is_valid(arg0), -EINVAL);
279 r = sd_bus_get_owner(bus, arg0, 0, NULL);
280 if (r < 0 && r != -ENOENT)
283 return sd_bus_reply_method_return(m, "b", r >= 0);
286 static int driver_request_name(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *error) {
287 struct kdbus_cmd_name *n;
294 r = sd_bus_message_read(m, "su", &name, &flags);
298 assert_return(service_name_is_valid(name), -EINVAL);
299 assert_return((flags & ~(BUS_NAME_ALLOW_REPLACEMENT|BUS_NAME_REPLACE_EXISTING|BUS_NAME_DO_NOT_QUEUE)) == 0, -EINVAL);
302 size = offsetof(struct kdbus_cmd_name, name) + l + 1;
305 memcpy(n->name, name, l+1);
306 kdbus_translate_request_name_flags(flags, (uint64_t *) &n->conn_flags);
308 /* This function is open-coded because we request the name 'on behalf'
309 * of the requesting connection */
310 r = bus_kernel_parse_unique_name(m->sender, &id);
316 r = ioctl(bus->input_fd, KDBUS_CMD_NAME_ACQUIRE, n);
319 return sd_bus_reply_method_return(m, "u", BUS_NAME_EXISTS);
320 if (errno == EALREADY)
321 return sd_bus_reply_method_return(m, "u", BUS_NAME_ALREADY_OWNER);
326 if (n->flags & KDBUS_NAME_IN_QUEUE)
327 return sd_bus_reply_method_return(m, "u", BUS_NAME_IN_QUEUE);
329 return sd_bus_reply_method_return(m, "u", BUS_NAME_PRIMARY_OWNER);
332 static int driver_release_name(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *error) {
333 struct kdbus_cmd_name *n;
339 r = sd_bus_message_read(m, "s", &name);
343 assert_return(service_name_is_valid(name), -EINVAL);
346 size = offsetof(struct kdbus_cmd_name, name) + l + 1;
349 memcpy(n->name, name, l+1);
351 /* This function is open-coded because we request the name 'on behalf'
352 * of the requesting connection */
353 r = bus_kernel_parse_unique_name(m->sender, &id);
359 r = ioctl(bus->input_fd, KDBUS_CMD_NAME_RELEASE, n);
362 return sd_bus_reply_method_return(m, "u", BUS_NAME_NON_EXISTENT);
363 if (errno == EADDRINUSE)
364 return sd_bus_reply_method_return(m, "u", BUS_NAME_NOT_OWNER);
368 return sd_bus_reply_method_return(m, "u", BUS_NAME_RELEASED);
371 static int driver_start_service_by_name(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *error) {
372 _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
373 _cleanup_strv_free_ char **t = NULL;
374 _cleanup_free_ char *path = NULL;
379 r = sd_bus_message_read(m, "su", &name, &flags);
383 assert_return(service_name_is_valid(name), -EINVAL);
384 assert_return(flags == 0, -ENOTSUP);
386 r = sd_bus_get_owner(bus, name, 0, NULL);
388 return sd_bus_reply_method_return(m, "u", BUS_START_REPLY_ALREADY_RUNNING);
392 u = strappenda(name, ".busname");
394 path = unit_dbus_path_from_name(u);
398 r = sd_bus_get_property_strv(
400 "org.freedesktop.systemd1",
402 "org.freedesktop.systemd1.Unit",
412 r = sd_bus_call_method(
414 "org.freedesktop.systemd1",
415 "/org/freedesktop/systemd1",
416 "org.freedesktop.systemd1.Manager",
426 return sd_bus_reply_method_return(m, "u", BUS_START_REPLY_SUCCESS);
429 static int driver_unsupported(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *error) {
430 return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "%s() is not supported", sd_bus_message_get_member(m));
433 static const sd_bus_vtable driver_vtable[] = {
434 SD_BUS_VTABLE_START(0),
435 SD_BUS_METHOD("AddMatch", "s", NULL, driver_add_match, 0),
436 SD_BUS_METHOD("GetConnectionSELinuxSecurityContext", "s", "ay", driver_get_security_ctx, SD_BUS_VTABLE_UNPRIVILEGED),
437 SD_BUS_METHOD("GetConnectionUnixProcessID", "s", "u", driver_get_pid, SD_BUS_VTABLE_UNPRIVILEGED),
438 SD_BUS_METHOD("GetConnectionUnixUser", "s", "u", driver_get_user, SD_BUS_VTABLE_UNPRIVILEGED),
439 SD_BUS_METHOD("GetId", NULL, "s", driver_get_id, SD_BUS_VTABLE_UNPRIVILEGED),
440 SD_BUS_METHOD("GetNameOwner", "s", "s", driver_get_name_owner, SD_BUS_VTABLE_UNPRIVILEGED),
441 SD_BUS_METHOD("Hello", NULL, "s", driver_hello, SD_BUS_VTABLE_UNPRIVILEGED),
442 SD_BUS_METHOD("ListActivatableNames", NULL, "as", driver_list_activatable_names, SD_BUS_VTABLE_UNPRIVILEGED),
443 SD_BUS_METHOD("ListNames", NULL, "as", driver_list_names, SD_BUS_VTABLE_UNPRIVILEGED),
444 SD_BUS_METHOD("ListQueuedOwners", "s", "as", driver_list_queued_owners, SD_BUS_VTABLE_UNPRIVILEGED),
445 SD_BUS_METHOD("NameHasOwner", "s", "b", driver_name_has_owner, SD_BUS_VTABLE_UNPRIVILEGED),
446 SD_BUS_METHOD("ReleaseName", "s", "u", driver_release_name, SD_BUS_VTABLE_UNPRIVILEGED),
447 SD_BUS_METHOD("ReloadConfig", NULL, NULL, driver_unsupported, SD_BUS_VTABLE_DEPRECATED),
448 SD_BUS_METHOD("RemoveMatch", "s", NULL, driver_remove_match, SD_BUS_VTABLE_UNPRIVILEGED),
449 SD_BUS_METHOD("RequestName", "su", "u", driver_request_name, SD_BUS_VTABLE_UNPRIVILEGED),
450 SD_BUS_METHOD("StartServiceByName", "su", "u", driver_start_service_by_name, SD_BUS_VTABLE_UNPRIVILEGED),
451 SD_BUS_METHOD("UpdateActivationEnvironment", "a{ss}", NULL, driver_unsupported, SD_BUS_VTABLE_DEPRECATED),
452 SD_BUS_SIGNAL("NameAcquired", "s", SD_BUS_VTABLE_DEPRECATED),
453 SD_BUS_SIGNAL("NameLost", "s", SD_BUS_VTABLE_DEPRECATED),
454 SD_BUS_SIGNAL("NameOwnerChanged", "sss", 0),
458 static int connect_bus(sd_event *event, sd_bus **_bus) {
459 _cleanup_bus_unref_ sd_bus *bus = NULL;
465 r = sd_bus_default_system(&bus);
467 log_error("Failed to create bus: %s", strerror(-r));
471 if (!bus->is_kernel) {
472 log_error("Not running on kdbus");
476 r = sd_bus_add_object_vtable(bus, "/org/freedesktop/DBus", "org.freedesktop.DBus", driver_vtable, NULL);
478 log_error("Failed to add manager object vtable: %s", strerror(-r));
482 r = sd_bus_request_name(bus, "org.freedesktop.DBus", 0);
484 log_error("Unable to request name: %s\n", strerror(-r));
488 r = sd_bus_attach_event(bus, event, 0);
490 log_error("Error %d while adding bus to even: %s", r, strerror(-r));
500 int main(int argc, char *argv[]) {
501 _cleanup_event_unref_ sd_event *event = NULL;
502 _cleanup_bus_unref_ sd_bus *bus = NULL;
505 log_set_target(LOG_TARGET_AUTO);
506 log_parse_environment();
510 log_error("This program takes no arguments.");
515 r = sd_event_default(&event);
517 log_error("Failed to allocate event loop: %s", strerror(-r));
521 sd_event_set_watchdog(event, true);
523 r = connect_bus(event, &bus);
527 r = bus_event_loop_with_idle(event, bus, "org.freedesktop.DBus", DEFAULT_EXIT_USEC);
529 log_error("Failed to run event loop: %s", strerror(-r));
534 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;