1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2013 Lennart Poettering
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.
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.
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/>.
39 #include "bus-internal.h"
40 #include "bus-message.h"
42 #include "bus-socket.h"
43 #include "bus-kernel.h"
44 #include "bus-control.h"
45 #include "bus-introspect.h"
46 #include "bus-signature.h"
47 #include "bus-objects.h"
49 #include "bus-container.h"
51 static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec);
53 static void bus_close_fds(sd_bus *b) {
57 close_nointr_nofail(b->input_fd);
59 if (b->output_fd >= 0 && b->output_fd != b->input_fd)
60 close_nointr_nofail(b->output_fd);
62 b->input_fd = b->output_fd = -1;
65 static void bus_node_destroy(sd_bus *b, struct node *n) {
66 struct node_callback *c;
67 struct node_vtable *v;
68 struct node_enumerator *e;
76 bus_node_destroy(b, n->child);
78 while ((c = n->callbacks)) {
79 LIST_REMOVE(callbacks, n->callbacks, c);
83 while ((v = n->vtables)) {
84 LIST_REMOVE(vtables, n->vtables, v);
89 while ((e = n->enumerators)) {
90 LIST_REMOVE(enumerators, n->enumerators, e);
95 LIST_REMOVE(siblings, n->parent->child, n);
97 assert_se(hashmap_remove(b->nodes, n->path) == n);
102 static void bus_reset_queues(sd_bus *b) {
107 for (i = 0; i < b->rqueue_size; i++)
108 sd_bus_message_unref(b->rqueue[i]);
111 for (i = 0; i < b->wqueue_size; i++)
112 sd_bus_message_unref(b->wqueue[i]);
115 b->rqueue = b->wqueue = NULL;
116 b->rqueue_size = b->wqueue_size = 0;
119 static void bus_free(sd_bus *b) {
120 struct filter_callback *f;
125 sd_bus_detach_event(b);
130 munmap(b->kdbus_buffer, KDBUS_POOL_SIZE);
133 free(b->unique_name);
134 free(b->auth_buffer);
140 strv_free(b->exec_argv);
142 close_many(b->fds, b->n_fds);
147 hashmap_free_free(b->reply_callbacks);
148 prioq_free(b->reply_callbacks_prioq);
150 while ((f = b->filter_callbacks)) {
151 LIST_REMOVE(callbacks, b->filter_callbacks, f);
155 bus_match_free(&b->match_callbacks);
157 hashmap_free_free(b->vtable_methods);
158 hashmap_free_free(b->vtable_properties);
160 while ((n = hashmap_first(b->nodes)))
161 bus_node_destroy(b, n);
163 hashmap_free(b->nodes);
165 bus_kernel_flush_memfd(b);
167 assert_se(pthread_mutex_destroy(&b->memfd_cache_mutex) == 0);
172 _public_ int sd_bus_new(sd_bus **ret) {
175 assert_return(ret, -EINVAL);
181 r->n_ref = REFCNT_INIT;
182 r->input_fd = r->output_fd = -1;
183 r->message_version = 1;
184 r->hello_flags |= KDBUS_HELLO_ACCEPT_FD;
185 r->attach_flags |= KDBUS_ATTACH_NAMES;
186 r->original_pid = getpid();
188 assert_se(pthread_mutex_init(&r->memfd_cache_mutex, NULL) == 0);
190 /* We guarantee that wqueue always has space for at least one
192 r->wqueue = new(sd_bus_message*, 1);
202 _public_ int sd_bus_set_address(sd_bus *bus, const char *address) {
205 assert_return(bus, -EINVAL);
206 assert_return(bus->state == BUS_UNSET, -EPERM);
207 assert_return(address, -EINVAL);
208 assert_return(!bus_pid_changed(bus), -ECHILD);
220 _public_ int sd_bus_set_fd(sd_bus *bus, int input_fd, int output_fd) {
221 assert_return(bus, -EINVAL);
222 assert_return(bus->state == BUS_UNSET, -EPERM);
223 assert_return(input_fd >= 0, -EINVAL);
224 assert_return(output_fd >= 0, -EINVAL);
225 assert_return(!bus_pid_changed(bus), -ECHILD);
227 bus->input_fd = input_fd;
228 bus->output_fd = output_fd;
232 _public_ int sd_bus_set_exec(sd_bus *bus, const char *path, char *const argv[]) {
235 assert_return(bus, -EINVAL);
236 assert_return(bus->state == BUS_UNSET, -EPERM);
237 assert_return(path, -EINVAL);
238 assert_return(!strv_isempty(argv), -EINVAL);
239 assert_return(!bus_pid_changed(bus), -ECHILD);
251 free(bus->exec_path);
252 strv_free(bus->exec_argv);
260 _public_ int sd_bus_set_bus_client(sd_bus *bus, int b) {
261 assert_return(bus, -EINVAL);
262 assert_return(bus->state == BUS_UNSET, -EPERM);
263 assert_return(!bus_pid_changed(bus), -ECHILD);
265 bus->bus_client = !!b;
269 _public_ int sd_bus_negotiate_fds(sd_bus *bus, int b) {
270 assert_return(bus, -EINVAL);
271 assert_return(bus->state == BUS_UNSET, -EPERM);
272 assert_return(!bus_pid_changed(bus), -ECHILD);
274 SET_FLAG(bus->hello_flags, KDBUS_HELLO_ACCEPT_FD, b);
278 _public_ int sd_bus_negotiate_attach_timestamp(sd_bus *bus, int b) {
279 assert_return(bus, -EINVAL);
280 assert_return(bus->state == BUS_UNSET, -EPERM);
281 assert_return(!bus_pid_changed(bus), -ECHILD);
283 SET_FLAG(bus->attach_flags, KDBUS_ATTACH_TIMESTAMP, b);
287 _public_ int sd_bus_negotiate_attach_creds(sd_bus *bus, uint64_t mask) {
288 assert_return(bus, -EINVAL);
289 assert_return(mask <= _SD_BUS_CREDS_MAX, -EINVAL);
290 assert_return(bus->state == BUS_UNSET, -EPERM);
291 assert_return(!bus_pid_changed(bus), -ECHILD);
293 return kdbus_translate_attach_flags(mask, &bus->creds_mask);
296 _public_ int sd_bus_set_server(sd_bus *bus, int b, sd_id128_t server_id) {
297 assert_return(bus, -EINVAL);
298 assert_return(b || sd_id128_equal(server_id, SD_ID128_NULL), -EINVAL);
299 assert_return(bus->state == BUS_UNSET, -EPERM);
300 assert_return(!bus_pid_changed(bus), -ECHILD);
302 bus->is_server = !!b;
303 bus->server_id = server_id;
307 _public_ int sd_bus_set_anonymous(sd_bus *bus, int b) {
308 assert_return(bus, -EINVAL);
309 assert_return(bus->state == BUS_UNSET, -EPERM);
310 assert_return(!bus_pid_changed(bus), -ECHILD);
312 bus->anonymous_auth = !!b;
316 static int hello_callback(sd_bus *bus, sd_bus_message *reply, void *userdata, sd_bus_error *error) {
321 assert(bus->state == BUS_HELLO || bus->state == BUS_CLOSING);
324 r = sd_bus_message_get_errno(reply);
330 r = sd_bus_message_read(reply, "s", &s);
334 if (!service_name_is_valid(s) || s[0] != ':')
337 bus->unique_name = strdup(s);
338 if (!bus->unique_name)
341 if (bus->state == BUS_HELLO)
342 bus->state = BUS_RUNNING;
347 static int bus_send_hello(sd_bus *bus) {
348 _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
353 if (!bus->bus_client || bus->is_kernel)
356 r = sd_bus_message_new_method_call(
358 "org.freedesktop.DBus",
360 "org.freedesktop.DBus",
366 return sd_bus_call_async(bus, m, hello_callback, NULL, 0, &bus->hello_serial);
369 int bus_start_running(sd_bus *bus) {
372 if (bus->bus_client && !bus->is_kernel) {
373 bus->state = BUS_HELLO;
377 bus->state = BUS_RUNNING;
381 static int parse_address_key(const char **p, const char *key, char **value) {
392 if (strncmp(*p, key, l) != 0)
405 while (*a != ';' && *a != ',' && *a != 0) {
423 c = (char) ((x << 4) | y);
430 t = realloc(r, n + 2);
458 static void skip_address_key(const char **p) {
462 *p += strcspn(*p, ",");
468 static int parse_unix_address(sd_bus *b, const char **p, char **guid) {
469 _cleanup_free_ char *path = NULL, *abstract = NULL;
478 while (**p != 0 && **p != ';') {
479 r = parse_address_key(p, "guid", guid);
485 r = parse_address_key(p, "path", &path);
491 r = parse_address_key(p, "abstract", &abstract);
500 if (!path && !abstract)
503 if (path && abstract)
508 if (l > sizeof(b->sockaddr.un.sun_path))
511 b->sockaddr.un.sun_family = AF_UNIX;
512 strncpy(b->sockaddr.un.sun_path, path, sizeof(b->sockaddr.un.sun_path));
513 b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l;
514 } else if (abstract) {
515 l = strlen(abstract);
516 if (l > sizeof(b->sockaddr.un.sun_path) - 1)
519 b->sockaddr.un.sun_family = AF_UNIX;
520 b->sockaddr.un.sun_path[0] = 0;
521 strncpy(b->sockaddr.un.sun_path+1, abstract, sizeof(b->sockaddr.un.sun_path)-1);
522 b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + 1 + l;
528 static int parse_tcp_address(sd_bus *b, const char **p, char **guid) {
529 _cleanup_free_ char *host = NULL, *port = NULL, *family = NULL;
531 struct addrinfo *result, hints = {
532 .ai_socktype = SOCK_STREAM,
533 .ai_flags = AI_ADDRCONFIG,
541 while (**p != 0 && **p != ';') {
542 r = parse_address_key(p, "guid", guid);
548 r = parse_address_key(p, "host", &host);
554 r = parse_address_key(p, "port", &port);
560 r = parse_address_key(p, "family", &family);
573 if (streq(family, "ipv4"))
574 hints.ai_family = AF_INET;
575 else if (streq(family, "ipv6"))
576 hints.ai_family = AF_INET6;
581 r = getaddrinfo(host, port, &hints, &result);
585 return -EADDRNOTAVAIL;
587 memcpy(&b->sockaddr, result->ai_addr, result->ai_addrlen);
588 b->sockaddr_size = result->ai_addrlen;
590 freeaddrinfo(result);
595 static int parse_exec_address(sd_bus *b, const char **p, char **guid) {
597 unsigned n_argv = 0, j;
606 while (**p != 0 && **p != ';') {
607 r = parse_address_key(p, "guid", guid);
613 r = parse_address_key(p, "path", &path);
619 if (startswith(*p, "argv")) {
623 ul = strtoul(*p + 4, (char**) p, 10);
624 if (errno > 0 || **p != '=' || ul > 256) {
634 x = realloc(argv, sizeof(char*) * (ul + 2));
640 memset(x + n_argv, 0, sizeof(char*) * (ul - n_argv + 2));
646 r = parse_address_key(p, NULL, argv + ul);
661 /* Make sure there are no holes in the array, with the
662 * exception of argv[0] */
663 for (j = 1; j < n_argv; j++)
669 if (argv && argv[0] == NULL) {
670 argv[0] = strdup(path);
682 for (j = 0; j < n_argv; j++)
690 static int parse_kernel_address(sd_bus *b, const char **p, char **guid) {
691 _cleanup_free_ char *path = NULL;
699 while (**p != 0 && **p != ';') {
700 r = parse_address_key(p, "guid", guid);
706 r = parse_address_key(p, "path", &path);
725 static int parse_container_address(sd_bus *b, const char **p, char **guid) {
726 _cleanup_free_ char *machine = NULL;
734 while (**p != 0 && **p != ';') {
735 r = parse_address_key(p, "guid", guid);
741 r = parse_address_key(p, "machine", &machine);
754 b->machine = machine;
757 b->sockaddr.un.sun_family = AF_UNIX;
758 strncpy(b->sockaddr.un.sun_path, "/var/run/dbus/system_bus_socket", sizeof(b->sockaddr.un.sun_path));
759 b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + sizeof("/var/run/dbus/system_bus_socket") - 1;
764 static void bus_reset_parsed_address(sd_bus *b) {
768 b->sockaddr_size = 0;
769 strv_free(b->exec_argv);
773 b->server_id = SD_ID128_NULL;
780 static int bus_parse_next_address(sd_bus *b) {
781 _cleanup_free_ char *guid = NULL;
789 if (b->address[b->address_index] == 0)
792 bus_reset_parsed_address(b);
794 a = b->address + b->address_index;
803 if (startswith(a, "unix:")) {
806 r = parse_unix_address(b, &a, &guid);
811 } else if (startswith(a, "tcp:")) {
814 r = parse_tcp_address(b, &a, &guid);
820 } else if (startswith(a, "unixexec:")) {
823 r = parse_exec_address(b, &a, &guid);
829 } else if (startswith(a, "kernel:")) {
832 r = parse_kernel_address(b, &a, &guid);
837 } else if (startswith(a, "x-container:")) {
840 r = parse_container_address(b, &a, &guid);
853 r = sd_id128_from_string(guid, &b->server_id);
858 b->address_index = a - b->address;
862 static int bus_start_address(sd_bus *b) {
872 r = bus_socket_exec(b);
876 b->last_connect_error = -r;
877 } else if (b->kernel) {
879 r = bus_kernel_connect(b);
883 b->last_connect_error = -r;
885 } else if (b->machine) {
887 r = bus_container_connect(b);
891 b->last_connect_error = -r;
893 } else if (b->sockaddr.sa.sa_family != AF_UNSPEC) {
895 r = bus_socket_connect(b);
899 b->last_connect_error = -r;
902 r = bus_parse_next_address(b);
906 return b->last_connect_error ? -b->last_connect_error : -ECONNREFUSED;
910 int bus_next_address(sd_bus *b) {
913 bus_reset_parsed_address(b);
914 return bus_start_address(b);
917 static int bus_start_fd(sd_bus *b) {
922 assert(b->input_fd >= 0);
923 assert(b->output_fd >= 0);
925 r = fd_nonblock(b->input_fd, true);
929 r = fd_cloexec(b->input_fd, true);
933 if (b->input_fd != b->output_fd) {
934 r = fd_nonblock(b->output_fd, true);
938 r = fd_cloexec(b->output_fd, true);
943 if (fstat(b->input_fd, &st) < 0)
946 if (S_ISCHR(b->input_fd))
947 return bus_kernel_take_fd(b);
949 return bus_socket_take_fd(b);
952 _public_ int sd_bus_start(sd_bus *bus) {
955 assert_return(bus, -EINVAL);
956 assert_return(bus->state == BUS_UNSET, -EPERM);
957 assert_return(!bus_pid_changed(bus), -ECHILD);
959 bus->state = BUS_OPENING;
961 if (bus->is_server && bus->bus_client)
964 if (bus->input_fd >= 0)
965 r = bus_start_fd(bus);
966 else if (bus->address || bus->sockaddr.sa.sa_family != AF_UNSPEC || bus->exec_path || bus->kernel || bus->machine)
967 r = bus_start_address(bus);
974 return bus_send_hello(bus);
977 _public_ int sd_bus_open_system(sd_bus **ret) {
982 assert_return(ret, -EINVAL);
988 e = secure_getenv("DBUS_SYSTEM_BUS_ADDRESS");
990 r = sd_bus_set_address(b, e);
994 b->sockaddr.un.sun_family = AF_UNIX;
995 strncpy(b->sockaddr.un.sun_path, "/run/dbus/system_bus_socket", sizeof(b->sockaddr.un.sun_path));
996 b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + sizeof("/run/dbus/system_bus_socket") - 1;
999 b->bus_client = true;
1001 r = sd_bus_start(b);
1013 _public_ int sd_bus_open_user(sd_bus **ret) {
1019 assert_return(ret, -EINVAL);
1025 e = secure_getenv("DBUS_SESSION_BUS_ADDRESS");
1027 r = sd_bus_set_address(b, e);
1031 e = secure_getenv("XDG_RUNTIME_DIR");
1038 if (l + 4 > sizeof(b->sockaddr.un.sun_path)) {
1043 b->sockaddr.un.sun_family = AF_UNIX;
1044 memcpy(mempcpy(b->sockaddr.un.sun_path, e, l), "/bus", 4);
1045 b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l + 4;
1048 b->bus_client = true;
1050 r = sd_bus_start(b);
1062 _public_ int sd_bus_open_system_remote(const char *host, sd_bus **ret) {
1063 _cleanup_free_ char *e = NULL;
1068 assert_return(host, -EINVAL);
1069 assert_return(ret, -EINVAL);
1071 e = bus_address_escape(host);
1075 p = strjoin("unixexec:path=ssh,argv1=-xT,argv2=", e, ",argv3=systemd-stdio-bridge", NULL);
1079 r = sd_bus_new(&bus);
1086 bus->bus_client = true;
1088 r = sd_bus_start(bus);
1098 _public_ int sd_bus_open_system_container(const char *machine, sd_bus **ret) {
1099 _cleanup_free_ char *e = NULL;
1104 assert_return(machine, -EINVAL);
1105 assert_return(ret, -EINVAL);
1107 e = bus_address_escape(machine);
1111 p = strjoin("x-container:machine=", e, NULL);
1115 r = sd_bus_new(&bus);
1122 bus->bus_client = true;
1124 r = sd_bus_start(bus);
1134 _public_ void sd_bus_close(sd_bus *bus) {
1138 if (bus->state == BUS_CLOSED)
1140 if (bus_pid_changed(bus))
1143 bus->state = BUS_CLOSED;
1145 sd_bus_detach_event(bus);
1147 /* Drop all queued messages so that they drop references to
1148 * the bus object and the bus may be freed */
1149 bus_reset_queues(bus);
1151 if (!bus->is_kernel)
1154 /* We'll leave the fd open in case this is a kernel bus, since
1155 * there might still be memblocks around that reference this
1156 * bus, and they might need to invoke the
1157 * KDBUS_CMD_MSG_RELEASE ioctl on the fd when they are
1161 static void bus_enter_closing(sd_bus *bus) {
1164 if (bus->state != BUS_OPENING &&
1165 bus->state != BUS_AUTHENTICATING &&
1166 bus->state != BUS_HELLO &&
1167 bus->state != BUS_RUNNING)
1170 bus->state = BUS_CLOSING;
1173 _public_ sd_bus *sd_bus_ref(sd_bus *bus) {
1174 assert_return(bus, NULL);
1176 assert_se(REFCNT_INC(bus->n_ref) >= 2);
1181 _public_ sd_bus *sd_bus_unref(sd_bus *bus) {
1182 assert_return(bus, NULL);
1184 if (REFCNT_DEC(bus->n_ref) <= 0)
1190 _public_ int sd_bus_is_open(sd_bus *bus) {
1192 assert_return(bus, -EINVAL);
1193 assert_return(!bus_pid_changed(bus), -ECHILD);
1195 return BUS_IS_OPEN(bus->state);
1198 _public_ int sd_bus_can_send(sd_bus *bus, char type) {
1201 assert_return(bus, -EINVAL);
1202 assert_return(bus->state != BUS_UNSET, -ENOTCONN);
1203 assert_return(!bus_pid_changed(bus), -ECHILD);
1205 if (type == SD_BUS_TYPE_UNIX_FD) {
1206 if (!(bus->hello_flags & KDBUS_HELLO_ACCEPT_FD))
1209 r = bus_ensure_running(bus);
1213 return bus->can_fds;
1216 return bus_type_is_valid(type);
1219 _public_ int sd_bus_get_server_id(sd_bus *bus, sd_id128_t *server_id) {
1222 assert_return(bus, -EINVAL);
1223 assert_return(server_id, -EINVAL);
1224 assert_return(!bus_pid_changed(bus), -ECHILD);
1226 r = bus_ensure_running(bus);
1230 *server_id = bus->server_id;
1234 int bus_seal_message(sd_bus *b, sd_bus_message *m) {
1237 if (m->header->version > b->message_version)
1241 /* If we copy the same message to multiple
1242 * destinations, avoid using the same serial
1244 b->serial = MAX(b->serial, BUS_MESSAGE_SERIAL(m));
1248 return bus_message_seal(m, ++b->serial);
1251 static int bus_write_message(sd_bus *bus, sd_bus_message *message, size_t *idx) {
1258 r = bus_kernel_write_message(bus, message);
1260 r = bus_socket_write_message(bus, message, idx);
1265 static int dispatch_wqueue(sd_bus *bus) {
1269 assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
1271 while (bus->wqueue_size > 0) {
1273 r = bus_write_message(bus, bus->wqueue[0], &bus->windex);
1277 /* Didn't do anything this time */
1279 else if (bus->is_kernel || bus->windex >= BUS_MESSAGE_SIZE(bus->wqueue[0])) {
1280 /* Fully written. Let's drop the entry from
1283 * This isn't particularly optimized, but
1284 * well, this is supposed to be our worst-case
1285 * buffer only, and the socket buffer is
1286 * supposed to be our primary buffer, and if
1287 * it got full, then all bets are off
1290 sd_bus_message_unref(bus->wqueue[0]);
1291 bus->wqueue_size --;
1292 memmove(bus->wqueue, bus->wqueue + 1, sizeof(sd_bus_message*) * bus->wqueue_size);
1302 static int bus_read_message(sd_bus *bus, sd_bus_message **m) {
1309 r = bus_kernel_read_message(bus, m);
1311 r = bus_socket_read_message(bus, m);
1316 static int dispatch_rqueue(sd_bus *bus, sd_bus_message **m) {
1317 sd_bus_message *z = NULL;
1322 assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
1324 if (bus->rqueue_size > 0) {
1325 /* Dispatch a queued message */
1327 *m = bus->rqueue[0];
1328 bus->rqueue_size --;
1329 memmove(bus->rqueue, bus->rqueue + 1, sizeof(sd_bus_message*) * bus->rqueue_size);
1333 /* Try to read a new message */
1335 r = bus_read_message(bus, &z);
1348 _public_ int sd_bus_send(sd_bus *bus, sd_bus_message *m, uint64_t *serial) {
1351 assert_return(bus, -EINVAL);
1352 assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
1353 assert_return(m, -EINVAL);
1354 assert_return(!bus_pid_changed(bus), -ECHILD);
1357 r = sd_bus_can_send(bus, SD_BUS_TYPE_UNIX_FD);
1364 /* If the serial number isn't kept, then we know that no reply
1366 if (!serial && !m->sealed)
1367 m->header->flags |= SD_BUS_MESSAGE_NO_REPLY_EXPECTED;
1369 r = bus_seal_message(bus, m);
1373 /* If this is a reply and no reply was requested, then let's
1374 * suppress this, if we can */
1375 if (m->dont_send && !serial)
1378 if ((bus->state == BUS_RUNNING || bus->state == BUS_HELLO) && bus->wqueue_size <= 0) {
1381 r = bus_write_message(bus, m, &idx);
1384 else if (!bus->is_kernel && idx < BUS_MESSAGE_SIZE(m)) {
1385 /* Wasn't fully written. So let's remember how
1386 * much was written. Note that the first entry
1387 * of the wqueue array is always allocated so
1388 * that we always can remember how much was
1390 bus->wqueue[0] = sd_bus_message_ref(m);
1391 bus->wqueue_size = 1;
1397 /* Just append it to the queue. */
1399 if (bus->wqueue_size >= BUS_WQUEUE_MAX)
1402 q = realloc(bus->wqueue, sizeof(sd_bus_message*) * (bus->wqueue_size + 1));
1407 q[bus->wqueue_size ++] = sd_bus_message_ref(m);
1411 *serial = BUS_MESSAGE_SERIAL(m);
1416 _public_ int sd_bus_send_to(sd_bus *bus, sd_bus_message *m, const char *destination, uint64_t *serial) {
1419 assert_return(bus, -EINVAL);
1420 assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
1421 assert_return(m, -EINVAL);
1422 assert_return(!bus_pid_changed(bus), -ECHILD);
1424 if (!streq_ptr(m->destination, destination)) {
1429 r = sd_bus_message_set_destination(m, destination);
1434 return sd_bus_send(bus, m, serial);
1437 static usec_t calc_elapse(uint64_t usec) {
1438 if (usec == (uint64_t) -1)
1442 usec = BUS_DEFAULT_TIMEOUT;
1444 return now(CLOCK_MONOTONIC) + usec;
1447 static int timeout_compare(const void *a, const void *b) {
1448 const struct reply_callback *x = a, *y = b;
1450 if (x->timeout != 0 && y->timeout == 0)
1453 if (x->timeout == 0 && y->timeout != 0)
1456 if (x->timeout < y->timeout)
1459 if (x->timeout > y->timeout)
1465 _public_ int sd_bus_call_async(
1468 sd_bus_message_handler_t callback,
1473 struct reply_callback *c;
1476 assert_return(bus, -EINVAL);
1477 assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
1478 assert_return(m, -EINVAL);
1479 assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL);
1480 assert_return(!(m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL);
1481 assert_return(callback, -EINVAL);
1482 assert_return(!bus_pid_changed(bus), -ECHILD);
1484 r = hashmap_ensure_allocated(&bus->reply_callbacks, uint64_hash_func, uint64_compare_func);
1488 if (usec != (uint64_t) -1) {
1489 r = prioq_ensure_allocated(&bus->reply_callbacks_prioq, timeout_compare);
1494 r = bus_seal_message(bus, m);
1498 c = new0(struct reply_callback, 1);
1502 c->callback = callback;
1503 c->userdata = userdata;
1504 c->serial = BUS_MESSAGE_SERIAL(m);
1505 c->timeout = calc_elapse(usec);
1507 r = hashmap_put(bus->reply_callbacks, &c->serial, c);
1513 if (c->timeout != 0) {
1514 r = prioq_put(bus->reply_callbacks_prioq, c, &c->prioq_idx);
1517 sd_bus_call_async_cancel(bus, c->serial);
1522 r = sd_bus_send(bus, m, serial);
1524 sd_bus_call_async_cancel(bus, c->serial);
1531 _public_ int sd_bus_call_async_cancel(sd_bus *bus, uint64_t serial) {
1532 struct reply_callback *c;
1534 assert_return(bus, -EINVAL);
1535 assert_return(serial != 0, -EINVAL);
1536 assert_return(!bus_pid_changed(bus), -ECHILD);
1538 c = hashmap_remove(bus->reply_callbacks, &serial);
1542 if (c->timeout != 0)
1543 prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx);
1549 int bus_ensure_running(sd_bus *bus) {
1554 if (bus->state == BUS_UNSET || bus->state == BUS_CLOSED || bus->state == BUS_CLOSING)
1556 if (bus->state == BUS_RUNNING)
1560 r = sd_bus_process(bus, NULL);
1563 if (bus->state == BUS_RUNNING)
1568 r = sd_bus_wait(bus, (uint64_t) -1);
1574 _public_ int sd_bus_call(
1578 sd_bus_error *error,
1579 sd_bus_message **reply) {
1586 assert_return(bus, -EINVAL);
1587 assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
1588 assert_return(m, -EINVAL);
1589 assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL);
1590 assert_return(!(m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL);
1591 assert_return(!bus_error_is_dirty(error), -EINVAL);
1592 assert_return(!bus_pid_changed(bus), -ECHILD);
1594 r = bus_ensure_running(bus);
1598 r = sd_bus_send(bus, m, &serial);
1602 timeout = calc_elapse(usec);
1606 sd_bus_message *incoming = NULL;
1611 if (bus->rqueue_size >= BUS_RQUEUE_MAX)
1614 /* Make sure there's room for queuing this
1615 * locally, before we read the message */
1617 q = realloc(bus->rqueue, (bus->rqueue_size + 1) * sizeof(sd_bus_message*));
1625 r = bus_read_message(bus, &incoming);
1631 if (incoming->reply_serial == serial) {
1632 /* Found a match! */
1634 if (incoming->header->type == SD_BUS_MESSAGE_METHOD_RETURN) {
1639 sd_bus_message_unref(incoming);
1644 if (incoming->header->type == SD_BUS_MESSAGE_METHOD_ERROR) {
1647 r = sd_bus_error_copy(error, &incoming->error);
1649 sd_bus_message_unref(incoming);
1653 k = sd_bus_error_get_errno(&incoming->error);
1654 sd_bus_message_unref(incoming);
1658 sd_bus_message_unref(incoming);
1661 } else if (incoming->header->serial == serial &&
1664 streq(bus->unique_name, incoming->sender)) {
1666 /* Our own message? Somebody is trying
1667 * to send its own client a message,
1668 * let's not dead-lock, let's fail
1671 sd_bus_message_unref(incoming);
1675 /* There's already guaranteed to be room for
1676 * this, so need to resize things here */
1677 bus->rqueue[bus->rqueue_size ++] = incoming;
1680 /* Try to read more, right-away */
1689 n = now(CLOCK_MONOTONIC);
1695 left = (uint64_t) -1;
1697 r = bus_poll(bus, true, left);
1701 r = dispatch_wqueue(bus);
1707 _public_ int sd_bus_get_fd(sd_bus *bus) {
1709 assert_return(bus, -EINVAL);
1710 assert_return(bus->input_fd == bus->output_fd, -EPERM);
1711 assert_return(!bus_pid_changed(bus), -ECHILD);
1713 return bus->input_fd;
1716 _public_ int sd_bus_get_events(sd_bus *bus) {
1719 assert_return(bus, -EINVAL);
1720 assert_return(BUS_IS_OPEN(bus->state) || bus->state == BUS_CLOSING, -ENOTCONN);
1721 assert_return(!bus_pid_changed(bus), -ECHILD);
1723 if (bus->state == BUS_OPENING)
1725 else if (bus->state == BUS_AUTHENTICATING) {
1727 if (bus_socket_auth_needs_write(bus))
1732 } else if (bus->state == BUS_RUNNING || bus->state == BUS_HELLO) {
1733 if (bus->rqueue_size <= 0)
1735 if (bus->wqueue_size > 0)
1742 _public_ int sd_bus_get_timeout(sd_bus *bus, uint64_t *timeout_usec) {
1743 struct reply_callback *c;
1745 assert_return(bus, -EINVAL);
1746 assert_return(timeout_usec, -EINVAL);
1747 assert_return(BUS_IS_OPEN(bus->state) || bus->state == BUS_CLOSING, -ENOTCONN);
1748 assert_return(!bus_pid_changed(bus), -ECHILD);
1750 if (bus->state == BUS_CLOSING) {
1755 if (bus->state == BUS_AUTHENTICATING) {
1756 *timeout_usec = bus->auth_timeout;
1760 if (bus->state != BUS_RUNNING && bus->state != BUS_HELLO) {
1761 *timeout_usec = (uint64_t) -1;
1765 if (bus->rqueue_size > 0) {
1770 c = prioq_peek(bus->reply_callbacks_prioq);
1772 *timeout_usec = (uint64_t) -1;
1776 *timeout_usec = c->timeout;
1780 static int process_timeout(sd_bus *bus) {
1781 _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL;
1782 _cleanup_bus_message_unref_ sd_bus_message* m = NULL;
1783 struct reply_callback *c;
1789 c = prioq_peek(bus->reply_callbacks_prioq);
1793 n = now(CLOCK_MONOTONIC);
1797 r = bus_message_new_synthetic_error(
1800 &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Method call timed out"),
1805 m->sender = "org.freedesktop.DBus";
1807 r = bus_seal_message(bus, m);
1811 assert_se(prioq_pop(bus->reply_callbacks_prioq) == c);
1812 hashmap_remove(bus->reply_callbacks, &c->serial);
1815 bus->iteration_counter ++;
1817 r = c->callback(bus, m, c->userdata, &error_buffer);
1818 r = bus_maybe_reply_error(m, r, &error_buffer);
1821 bus->current = NULL;
1826 static int process_hello(sd_bus *bus, sd_bus_message *m) {
1830 if (bus->state != BUS_HELLO)
1833 /* Let's make sure the first message on the bus is the HELLO
1834 * reply. But note that we don't actually parse the message
1835 * here (we leave that to the usual handling), we just verify
1836 * we don't let any earlier msg through. */
1838 if (m->header->type != SD_BUS_MESSAGE_METHOD_RETURN &&
1839 m->header->type != SD_BUS_MESSAGE_METHOD_ERROR)
1842 if (m->reply_serial != bus->hello_serial)
1848 static int process_reply(sd_bus *bus, sd_bus_message *m) {
1849 _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL;
1850 struct reply_callback *c;
1856 if (m->header->type != SD_BUS_MESSAGE_METHOD_RETURN &&
1857 m->header->type != SD_BUS_MESSAGE_METHOD_ERROR)
1860 c = hashmap_remove(bus->reply_callbacks, &m->reply_serial);
1864 if (c->timeout != 0)
1865 prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx);
1867 r = sd_bus_message_rewind(m, true);
1871 r = c->callback(bus, m, c->userdata, &error_buffer);
1872 r = bus_maybe_reply_error(m, r, &error_buffer);
1878 static int process_filter(sd_bus *bus, sd_bus_message *m) {
1879 _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL;
1880 struct filter_callback *l;
1887 bus->filter_callbacks_modified = false;
1889 LIST_FOREACH(callbacks, l, bus->filter_callbacks) {
1891 if (bus->filter_callbacks_modified)
1894 /* Don't run this more than once per iteration */
1895 if (l->last_iteration == bus->iteration_counter)
1898 l->last_iteration = bus->iteration_counter;
1900 r = sd_bus_message_rewind(m, true);
1904 r = l->callback(bus, m, l->userdata, &error_buffer);
1905 r = bus_maybe_reply_error(m, r, &error_buffer);
1911 } while (bus->filter_callbacks_modified);
1916 static int process_match(sd_bus *bus, sd_bus_message *m) {
1923 bus->match_callbacks_modified = false;
1925 r = bus_match_run(bus, &bus->match_callbacks, m);
1929 } while (bus->match_callbacks_modified);
1934 static int process_builtin(sd_bus *bus, sd_bus_message *m) {
1935 _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
1941 if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL)
1944 if (!streq_ptr(m->interface, "org.freedesktop.DBus.Peer"))
1947 if (m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED)
1950 if (streq_ptr(m->member, "Ping"))
1951 r = sd_bus_message_new_method_return(m, &reply);
1952 else if (streq_ptr(m->member, "GetMachineId")) {
1956 r = sd_id128_get_machine(&id);
1960 r = sd_bus_message_new_method_return(m, &reply);
1964 r = sd_bus_message_append(reply, "s", sd_id128_to_string(id, sid));
1966 r = sd_bus_message_new_method_errorf(
1968 SD_BUS_ERROR_UNKNOWN_METHOD,
1969 "Unknown method '%s' on interface '%s'.", m->member, m->interface);
1975 r = sd_bus_send(bus, reply, NULL);
1982 static int process_message(sd_bus *bus, sd_bus_message *m) {
1989 bus->iteration_counter++;
1991 log_debug("Got message sender=%s object=%s interface=%s member=%s",
1992 strna(sd_bus_message_get_sender(m)),
1993 strna(sd_bus_message_get_path(m)),
1994 strna(sd_bus_message_get_interface(m)),
1995 strna(sd_bus_message_get_member(m)));
1997 r = process_hello(bus, m);
2001 r = process_reply(bus, m);
2005 r = process_filter(bus, m);
2009 r = process_match(bus, m);
2013 r = process_builtin(bus, m);
2017 r = bus_process_object(bus, m);
2020 bus->current = NULL;
2024 static int process_running(sd_bus *bus, sd_bus_message **ret) {
2025 _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
2029 assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
2031 r = process_timeout(bus);
2035 r = dispatch_wqueue(bus);
2039 r = dispatch_rqueue(bus, &m);
2045 r = process_message(bus, m);
2050 r = sd_bus_message_rewind(m, true);
2059 if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL) {
2061 r = sd_bus_reply_method_errorf(
2063 SD_BUS_ERROR_UNKNOWN_OBJECT,
2064 "Unknown object '%s'.", m->path);
2078 static int process_closing(sd_bus *bus, sd_bus_message **ret) {
2079 _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
2080 struct reply_callback *c;
2084 assert(bus->state == BUS_CLOSING);
2086 c = hashmap_first(bus->reply_callbacks);
2088 _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL;
2090 /* First, fail all outstanding method calls */
2091 r = bus_message_new_synthetic_error(
2094 &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Connection terminated"),
2099 r = bus_seal_message(bus, m);
2103 if (c->timeout != 0)
2104 prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx);
2106 hashmap_remove(bus->reply_callbacks, &c->serial);
2109 bus->iteration_counter++;
2111 r = c->callback(bus, m, c->userdata, &error_buffer);
2112 r = bus_maybe_reply_error(m, r, &error_buffer);
2118 /* Then, synthesize a Disconnected message */
2119 r = sd_bus_message_new_signal(
2121 "/org/freedesktop/DBus/Local",
2122 "org.freedesktop.DBus.Local",
2128 m->sender = "org.freedesktop.DBus.Local";
2130 r = bus_seal_message(bus, m);
2137 bus->iteration_counter++;
2139 r = process_filter(bus, m);
2143 r = process_match(bus, m);
2155 bus->current = NULL;
2159 _public_ int sd_bus_process(sd_bus *bus, sd_bus_message **ret) {
2160 BUS_DONT_DESTROY(bus);
2163 /* Returns 0 when we didn't do anything. This should cause the
2164 * caller to invoke sd_bus_wait() before returning the next
2165 * time. Returns > 0 when we did something, which possibly
2166 * means *ret is filled in with an unprocessed message. */
2168 assert_return(bus, -EINVAL);
2169 assert_return(!bus_pid_changed(bus), -ECHILD);
2171 /* We don't allow recursively invoking sd_bus_process(). */
2172 assert_return(!bus->current, -EBUSY);
2174 switch (bus->state) {
2181 r = bus_socket_process_opening(bus);
2182 if (r == -ECONNRESET || r == -EPIPE) {
2183 bus_enter_closing(bus);
2191 case BUS_AUTHENTICATING:
2192 r = bus_socket_process_authenticating(bus);
2193 if (r == -ECONNRESET || r == -EPIPE) {
2194 bus_enter_closing(bus);
2206 r = process_running(bus, ret);
2207 if (r == -ECONNRESET || r == -EPIPE) {
2208 bus_enter_closing(bus);
2218 return process_closing(bus, ret);
2221 assert_not_reached("Unknown state");
2224 static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec) {
2225 struct pollfd p[2] = {};
2228 usec_t m = (usec_t) -1;
2232 if (bus->state == BUS_CLOSING)
2235 assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
2237 e = sd_bus_get_events(bus);
2242 /* The caller really needs some more data, he doesn't
2243 * care about what's already read, or any timeouts
2248 /* The caller wants to process if there's something to
2249 * process, but doesn't care otherwise */
2251 r = sd_bus_get_timeout(bus, &until);
2256 nw = now(CLOCK_MONOTONIC);
2257 m = until > nw ? until - nw : 0;
2261 if (timeout_usec != (uint64_t) -1 && (m == (uint64_t) -1 || timeout_usec < m))
2264 p[0].fd = bus->input_fd;
2265 if (bus->output_fd == bus->input_fd) {
2269 p[0].events = e & POLLIN;
2270 p[1].fd = bus->output_fd;
2271 p[1].events = e & POLLOUT;
2275 r = ppoll(p, n, m == (uint64_t) -1 ? NULL : timespec_store(&ts, m), NULL);
2279 return r > 0 ? 1 : 0;
2282 _public_ int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) {
2284 assert_return(bus, -EINVAL);
2285 assert_return(!bus_pid_changed(bus), -ECHILD);
2287 if (bus->state == BUS_CLOSING)
2290 assert_return(BUS_IS_OPEN(bus->state) , -ENOTCONN);
2292 if (bus->rqueue_size > 0)
2295 return bus_poll(bus, false, timeout_usec);
2298 _public_ int sd_bus_flush(sd_bus *bus) {
2301 assert_return(bus, -EINVAL);
2302 assert_return(!bus_pid_changed(bus), -ECHILD);
2304 if (bus->state == BUS_CLOSING)
2307 assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
2309 r = bus_ensure_running(bus);
2313 if (bus->wqueue_size <= 0)
2317 r = dispatch_wqueue(bus);
2321 if (bus->wqueue_size <= 0)
2324 r = bus_poll(bus, false, (uint64_t) -1);
2330 _public_ int sd_bus_add_filter(sd_bus *bus,
2331 sd_bus_message_handler_t callback,
2334 struct filter_callback *f;
2336 assert_return(bus, -EINVAL);
2337 assert_return(callback, -EINVAL);
2338 assert_return(!bus_pid_changed(bus), -ECHILD);
2340 f = new0(struct filter_callback, 1);
2343 f->callback = callback;
2344 f->userdata = userdata;
2346 bus->filter_callbacks_modified = true;
2347 LIST_PREPEND(callbacks, bus->filter_callbacks, f);
2351 _public_ int sd_bus_remove_filter(sd_bus *bus,
2352 sd_bus_message_handler_t callback,
2355 struct filter_callback *f;
2357 assert_return(bus, -EINVAL);
2358 assert_return(callback, -EINVAL);
2359 assert_return(!bus_pid_changed(bus), -ECHILD);
2361 LIST_FOREACH(callbacks, f, bus->filter_callbacks) {
2362 if (f->callback == callback && f->userdata == userdata) {
2363 bus->filter_callbacks_modified = true;
2364 LIST_REMOVE(callbacks, bus->filter_callbacks, f);
2373 _public_ int sd_bus_add_match(sd_bus *bus,
2375 sd_bus_message_handler_t callback,
2378 struct bus_match_component *components = NULL;
2379 unsigned n_components = 0;
2380 uint64_t cookie = 0;
2383 assert_return(bus, -EINVAL);
2384 assert_return(match, -EINVAL);
2385 assert_return(!bus_pid_changed(bus), -ECHILD);
2387 r = bus_match_parse(match, &components, &n_components);
2391 if (bus->bus_client) {
2392 cookie = ++bus->match_cookie;
2394 r = bus_add_match_internal(bus, match, components, n_components, cookie);
2399 bus->match_callbacks_modified = true;
2400 r = bus_match_add(&bus->match_callbacks, components, n_components, callback, userdata, cookie, NULL);
2402 if (bus->bus_client)
2403 bus_remove_match_internal(bus, match, cookie);
2407 bus_match_parse_free(components, n_components);
2411 _public_ int sd_bus_remove_match(sd_bus *bus,
2413 sd_bus_message_handler_t callback,
2416 struct bus_match_component *components = NULL;
2417 unsigned n_components = 0;
2419 uint64_t cookie = 0;
2421 assert_return(bus, -EINVAL);
2422 assert_return(match, -EINVAL);
2423 assert_return(!bus_pid_changed(bus), -ECHILD);
2425 r = bus_match_parse(match, &components, &n_components);
2429 bus->match_callbacks_modified = true;
2430 r = bus_match_remove(&bus->match_callbacks, components, n_components, callback, userdata, &cookie);
2432 if (bus->bus_client)
2433 q = bus_remove_match_internal(bus, match, cookie);
2435 bus_match_parse_free(components, n_components);
2437 return r < 0 ? r : q;
2440 bool bus_pid_changed(sd_bus *bus) {
2443 /* We don't support people creating a bus connection and
2444 * keeping it around over a fork(). Let's complain. */
2446 return bus->original_pid != getpid();
2449 static int io_callback(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
2450 sd_bus *bus = userdata;
2455 r = sd_bus_process(bus, NULL);
2462 static int time_callback(sd_event_source *s, uint64_t usec, void *userdata) {
2463 sd_bus *bus = userdata;
2468 r = sd_bus_process(bus, NULL);
2475 static int prepare_callback(sd_event_source *s, void *userdata) {
2476 sd_bus *bus = userdata;
2483 e = sd_bus_get_events(bus);
2487 if (bus->output_fd != bus->input_fd) {
2489 r = sd_event_source_set_io_events(bus->input_io_event_source, e & POLLIN);
2493 r = sd_event_source_set_io_events(bus->output_io_event_source, e & POLLOUT);
2497 r = sd_event_source_set_io_events(bus->input_io_event_source, e);
2502 r = sd_bus_get_timeout(bus, &until);
2508 j = sd_event_source_set_time(bus->time_event_source, until);
2513 r = sd_event_source_set_enabled(bus->time_event_source, r > 0);
2520 static int quit_callback(sd_event_source *event, void *userdata) {
2521 sd_bus *bus = userdata;
2530 _public_ int sd_bus_attach_event(sd_bus *bus, sd_event *event, int priority) {
2533 assert_return(bus, -EINVAL);
2534 assert_return(!bus->event, -EBUSY);
2536 assert(!bus->input_io_event_source);
2537 assert(!bus->output_io_event_source);
2538 assert(!bus->time_event_source);
2541 bus->event = sd_event_ref(event);
2543 r = sd_event_default(&bus->event);
2548 r = sd_event_add_io(bus->event, bus->input_fd, 0, io_callback, bus, &bus->input_io_event_source);
2552 r = sd_event_source_set_priority(bus->input_io_event_source, priority);
2556 if (bus->output_fd != bus->input_fd) {
2557 r = sd_event_add_io(bus->event, bus->output_fd, 0, io_callback, bus, &bus->output_io_event_source);
2561 r = sd_event_source_set_priority(bus->output_io_event_source, priority);
2566 r = sd_event_source_set_prepare(bus->input_io_event_source, prepare_callback);
2570 r = sd_event_add_monotonic(bus->event, 0, 0, time_callback, bus, &bus->time_event_source);
2574 r = sd_event_source_set_priority(bus->time_event_source, priority);
2578 r = sd_event_add_quit(bus->event, quit_callback, bus, &bus->quit_event_source);
2585 sd_bus_detach_event(bus);
2589 _public_ int sd_bus_detach_event(sd_bus *bus) {
2590 assert_return(bus, -EINVAL);
2591 assert_return(bus->event, -ENXIO);
2593 if (bus->input_io_event_source) {
2594 sd_event_source_set_enabled(bus->input_io_event_source, SD_EVENT_OFF);
2595 bus->input_io_event_source = sd_event_source_unref(bus->input_io_event_source);
2598 if (bus->output_io_event_source) {
2599 sd_event_source_set_enabled(bus->output_io_event_source, SD_EVENT_OFF);
2600 bus->output_io_event_source = sd_event_source_unref(bus->output_io_event_source);
2603 if (bus->time_event_source) {
2604 sd_event_source_set_enabled(bus->time_event_source, SD_EVENT_OFF);
2605 bus->time_event_source = sd_event_source_unref(bus->time_event_source);
2608 if (bus->quit_event_source) {
2609 sd_event_source_set_enabled(bus->quit_event_source, SD_EVENT_OFF);
2610 bus->quit_event_source = sd_event_source_unref(bus->quit_event_source);
2614 bus->event = sd_event_unref(bus->event);
2619 _public_ sd_event* sd_bus_get_event(sd_bus *bus) {
2620 assert_return(bus, NULL);
2625 _public_ sd_bus_message* sd_bus_get_current(sd_bus *bus) {
2626 assert_return(bus, NULL);
2628 return bus->current;
2631 static int bus_default(int (*bus_open)(sd_bus **), sd_bus **default_bus, sd_bus **ret) {
2636 assert(default_bus);
2639 return !!*default_bus;
2642 *ret = sd_bus_ref(*default_bus);
2650 b->default_bus_ptr = default_bus;
2658 _public_ int sd_bus_default_system(sd_bus **ret) {
2659 static __thread sd_bus *default_system_bus = NULL;
2661 return bus_default(sd_bus_open_system, &default_system_bus, ret);
2664 _public_ int sd_bus_default_user(sd_bus **ret) {
2665 static __thread sd_bus *default_user_bus = NULL;
2667 return bus_default(sd_bus_open_user, &default_user_bus, ret);
2670 _public_ int sd_bus_get_tid(sd_bus *b, pid_t *tid) {
2671 assert_return(b, -EINVAL);
2672 assert_return(tid, -EINVAL);
2673 assert_return(!bus_pid_changed(b), -ECHILD);
2681 return sd_event_get_tid(b->event, tid);
2686 _public_ char *sd_bus_label_escape(const char *s) {
2690 assert_return(s, NULL);
2692 /* Escapes all chars that D-Bus' object path cannot deal
2693 * with. Can be reversed with bus_path_unescape(). We special
2694 * case the empty string. */
2699 r = new(char, strlen(s)*3 + 1);
2703 for (f = s, t = r; *f; f++) {
2705 /* Escape everything that is not a-zA-Z0-9. We also
2706 * escape 0-9 if it's the first character */
2708 if (!(*f >= 'A' && *f <= 'Z') &&
2709 !(*f >= 'a' && *f <= 'z') &&
2710 !(f > s && *f >= '0' && *f <= '9')) {
2712 *(t++) = hexchar(*f >> 4);
2713 *(t++) = hexchar(*f);
2723 _public_ char *sd_bus_label_unescape(const char *f) {
2726 assert_return(f, NULL);
2728 /* Special case for the empty string */
2732 r = new(char, strlen(f) + 1);
2736 for (t = r; *f; f++) {
2741 if ((a = unhexchar(f[1])) < 0 ||
2742 (b = unhexchar(f[2])) < 0) {
2743 /* Invalid escape code, let's take it literal then */
2746 *(t++) = (char) ((a << 4) | b);
2758 _public_ int sd_bus_get_peer_creds(sd_bus *bus, uint64_t mask, sd_bus_creds **ret) {
2763 assert_return(bus, -EINVAL);
2764 assert_return(mask <= _SD_BUS_CREDS_MAX, -ENOTSUP);
2765 assert_return(ret, -EINVAL);
2766 assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
2767 assert_return(!bus_pid_changed(bus), -ECHILD);
2768 assert_return(!bus->is_kernel, -ENOTSUP);
2770 if (!bus->ucred_valid && !isempty(bus->label))
2773 c = bus_creds_new();
2777 if (bus->ucred_valid) {
2778 pid = c->pid = bus->ucred.pid;
2779 c->uid = bus->ucred.uid;
2780 c->gid = bus->ucred.gid;
2782 c->mask |= ((SD_BUS_CREDS_UID | SD_BUS_CREDS_PID | SD_BUS_CREDS_GID) & mask) & bus->creds_mask;
2785 if (!isempty(bus->label) && (mask & SD_BUS_CREDS_SELINUX_CONTEXT)) {
2786 c->label = strdup(bus->label);
2788 sd_bus_creds_unref(c);
2792 c->mask |= SD_BUS_CREDS_SELINUX_CONTEXT | bus->creds_mask;
2795 r = bus_creds_add_more(c, mask, pid, 0);