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/>.
22 #include <sys/socket.h>
24 #include "sd-daemon.h"
30 #include "path-util.h"
33 #include "signal-util.h"
34 #include "unit-name.h"
37 #include "bus-error.h"
38 #include "bus-label.h"
39 #include "bus-message.h"
41 #include "bus-internal.h"
43 static int name_owner_change_callback(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
44 sd_event *e = userdata;
49 sd_bus_close(sd_bus_message_get_bus(m));
55 int bus_async_unregister_and_exit(sd_event *e, sd_bus *bus, const char *name) {
56 _cleanup_free_ char *match = NULL;
64 /* We unregister the name here and then wait for the
65 * NameOwnerChanged signal for this event to arrive before we
66 * quit. We do this in order to make sure that any queued
67 * requests are still processed before we really exit. */
69 r = sd_bus_get_unique_name(bus, &unique);
74 "sender='org.freedesktop.DBus',"
76 "interface='org.freedesktop.DBus',"
77 "member='NameOwnerChanged',"
78 "path='/org/freedesktop/DBus',"
81 "arg2=''", name, unique);
85 r = sd_bus_add_match(bus, NULL, match, name_owner_change_callback, e);
89 r = sd_bus_release_name(bus, name);
96 int bus_event_loop_with_idle(
101 check_idle_t check_idle,
103 bool exiting = false;
113 r = sd_event_get_state(e);
116 if (r == SD_EVENT_FINISHED)
120 idle = check_idle(userdata);
124 r = sd_event_run(e, exiting || !idle ? (uint64_t) -1 : timeout);
128 if (r == 0 && !exiting && idle) {
130 r = sd_bus_try_close(bus);
134 /* Fallback for dbus1 connections: we
135 * unregister the name and wait for the
136 * response to come through for it */
137 if (r == -EOPNOTSUPP) {
139 /* Inform the service manager that we
140 * are going down, so that it will
141 * queue all further start requests,
142 * instead of assuming we are already
144 sd_notify(false, "STOPPING=1");
146 r = bus_async_unregister_and_exit(e, bus, name);
162 r = sd_event_get_exit_code(e, &code);
169 int bus_name_has_owner(sd_bus *c, const char *name, sd_bus_error *error) {
170 _cleanup_bus_message_unref_ sd_bus_message *rep = NULL;
171 int r, has_owner = 0;
176 r = sd_bus_call_method(c,
177 "org.freedesktop.DBus",
178 "/org/freedesktop/dbus",
179 "org.freedesktop.DBus",
188 r = sd_bus_message_read_basic(rep, 'b', &has_owner);
190 return sd_bus_error_set_errno(error, r);
195 static int check_good_user(sd_bus_message *m, uid_t good_user) {
196 _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
202 if (good_user == UID_INVALID)
205 r = sd_bus_query_sender_creds(m, SD_BUS_CREDS_EUID, &creds);
209 /* Don't trust augmented credentials for authorization */
210 assert_return((sd_bus_creds_get_augmented_mask(creds) & SD_BUS_CREDS_EUID) == 0, -EPERM);
212 r = sd_bus_creds_get_euid(creds, &sender_uid);
216 return sender_uid == good_user;
220 sd_bus_message *call,
232 /* Tests non-interactively! */
234 r = check_good_user(call, good_user);
238 r = sd_bus_query_sender_privilege(call, capability);
245 _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
246 int authorized = false, challenge = false;
249 sender = sd_bus_message_get_sender(call);
253 r = sd_bus_call_method(
255 "org.freedesktop.PolicyKit1",
256 "/org/freedesktop/PolicyKit1/Authority",
257 "org.freedesktop.PolicyKit1.Authority",
258 "CheckAuthorization",
262 "system-bus-name", 1, "name", "s", sender,
269 /* Treat no PK available as access denied */
270 if (sd_bus_error_has_name(e, SD_BUS_ERROR_SERVICE_UNKNOWN)) {
271 sd_bus_error_free(e);
278 r = sd_bus_message_enter_container(reply, 'r', "bba{ss}");
282 r = sd_bus_message_read(reply, "bb", &authorized, &challenge);
290 *_challenge = challenge;
301 typedef struct AsyncPolkitQuery {
302 sd_bus_message *request, *reply;
303 sd_bus_message_handler_t callback;
309 static void async_polkit_query_free(AsyncPolkitQuery *q) {
314 sd_bus_slot_unref(q->slot);
316 if (q->registry && q->request)
317 hashmap_remove(q->registry, q->request);
319 sd_bus_message_unref(q->request);
320 sd_bus_message_unref(q->reply);
325 static int async_polkit_callback(sd_bus_message *reply, void *userdata, sd_bus_error *error) {
326 _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL;
327 AsyncPolkitQuery *q = userdata;
333 q->slot = sd_bus_slot_unref(q->slot);
334 q->reply = sd_bus_message_ref(reply);
336 r = sd_bus_message_rewind(q->request, true);
338 r = sd_bus_reply_method_errno(q->request, r, NULL);
342 r = q->callback(q->request, q->userdata, &error_buffer);
343 r = bus_maybe_reply_error(q->request, r, &error_buffer);
346 async_polkit_query_free(q);
353 int bus_verify_polkit_async(
354 sd_bus_message *call,
360 sd_bus_error *error) {
363 _cleanup_bus_message_unref_ sd_bus_message *pk = NULL;
366 sd_bus_message_handler_t callback;
376 r = check_good_user(call, good_user);
381 q = hashmap_get(*registry, call);
383 int authorized, challenge;
385 /* This is the second invocation of this function, and
386 * there's already a response from polkit, let's
390 if (sd_bus_message_is_method_error(q->reply, NULL)) {
391 const sd_bus_error *e;
393 /* Copy error from polkit reply */
394 e = sd_bus_message_get_error(q->reply);
395 sd_bus_error_copy(error, e);
397 /* Treat no PK available as access denied */
398 if (sd_bus_error_has_name(e, SD_BUS_ERROR_SERVICE_UNKNOWN))
401 return -sd_bus_error_get_errno(e);
404 r = sd_bus_message_enter_container(q->reply, 'r', "bba{ss}");
406 r = sd_bus_message_read(q->reply, "bb", &authorized, &challenge);
415 return sd_bus_error_set(error, SD_BUS_ERROR_INTERACTIVE_AUTHORIZATION_REQUIRED, "Interactive authentication required.");
421 r = sd_bus_query_sender_privilege(call, capability);
428 if (sd_bus_get_current_message(call->bus) != call)
431 callback = sd_bus_get_current_handler(call->bus);
435 userdata = sd_bus_get_current_userdata(call->bus);
437 sender = sd_bus_message_get_sender(call);
441 c = sd_bus_message_get_allow_interactive_authorization(call);
447 r = hashmap_ensure_allocated(registry, NULL);
451 r = sd_bus_message_new_method_call(
454 "org.freedesktop.PolicyKit1",
455 "/org/freedesktop/PolicyKit1/Authority",
456 "org.freedesktop.PolicyKit1.Authority",
457 "CheckAuthorization");
461 r = sd_bus_message_append(
464 "system-bus-name", 1, "name", "s", sender,
472 q = new0(AsyncPolkitQuery, 1);
476 q->request = sd_bus_message_ref(call);
477 q->callback = callback;
478 q->userdata = userdata;
480 r = hashmap_put(*registry, call, q);
482 async_polkit_query_free(q);
486 q->registry = *registry;
488 r = sd_bus_call_async(call->bus, &q->slot, pk, async_polkit_callback, q, 0);
490 async_polkit_query_free(q);
500 void bus_verify_polkit_async_registry_free(Hashmap *registry) {
504 while ((q = hashmap_steal_first(registry)))
505 async_polkit_query_free(q);
507 hashmap_free(registry);
511 int bus_check_peercred(sd_bus *c) {
518 fd = sd_bus_get_fd(c);
522 l = sizeof(struct ucred);
523 if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l) < 0)
526 if (l != sizeof(struct ucred))
529 if (ucred.uid != 0 && ucred.uid != geteuid())
535 int bus_open_system_systemd(sd_bus **_bus) {
536 _cleanup_bus_unref_ sd_bus *bus = NULL;
542 return sd_bus_open_system(_bus);
544 /* If we are root and kdbus is not available, then let's talk
545 * directly to the system instance, instead of going via the
548 r = sd_bus_new(&bus);
552 r = sd_bus_set_address(bus, KERNEL_SYSTEM_BUS_ADDRESS);
556 bus->bus_client = true;
558 r = sd_bus_start(bus);
565 bus = sd_bus_unref(bus);
567 r = sd_bus_new(&bus);
571 r = sd_bus_set_address(bus, "unix:path=/run/systemd/private");
575 r = sd_bus_start(bus);
577 return sd_bus_open_system(_bus);
579 r = bus_check_peercred(bus);
589 int bus_open_user_systemd(sd_bus **_bus) {
590 _cleanup_bus_unref_ sd_bus *bus = NULL;
591 _cleanup_free_ char *ee = NULL;
595 /* Try via kdbus first, and then directly */
599 r = sd_bus_new(&bus);
603 if (asprintf(&bus->address, KERNEL_USER_BUS_ADDRESS_FMT, getuid()) < 0)
606 bus->bus_client = true;
608 r = sd_bus_start(bus);
615 bus = sd_bus_unref(bus);
617 e = secure_getenv("XDG_RUNTIME_DIR");
619 return sd_bus_open_user(_bus);
621 ee = bus_address_escape(e);
625 r = sd_bus_new(&bus);
629 bus->address = strjoin("unix:path=", ee, "/systemd/private", NULL);
633 r = sd_bus_start(bus);
635 return sd_bus_open_user(_bus);
637 r = bus_check_peercred(bus);
647 int bus_print_property(const char *name, sd_bus_message *property, bool all) {
649 const char *contents;
655 r = sd_bus_message_peek_type(property, &type, &contents);
661 case SD_BUS_TYPE_STRING: {
664 r = sd_bus_message_read_basic(property, type, &s);
668 if (all || !isempty(s)) {
669 _cleanup_free_ char *escaped = NULL;
671 escaped = xescape(s, "\n");
675 printf("%s=%s\n", name, escaped);
681 case SD_BUS_TYPE_BOOLEAN: {
684 r = sd_bus_message_read_basic(property, type, &b);
688 printf("%s=%s\n", name, yes_no(b));
693 case SD_BUS_TYPE_UINT64: {
696 r = sd_bus_message_read_basic(property, type, &u);
700 /* Yes, heuristics! But we can change this check
701 * should it turn out to not be sufficient */
703 if (endswith(name, "Timestamp")) {
704 char timestamp[FORMAT_TIMESTAMP_MAX], *t;
706 t = format_timestamp(timestamp, sizeof(timestamp), u);
708 printf("%s=%s\n", name, strempty(t));
710 } else if (strstr(name, "USec")) {
711 char timespan[FORMAT_TIMESPAN_MAX];
713 printf("%s=%s\n", name, format_timespan(timespan, sizeof(timespan), u, 0));
715 printf("%s=%llu\n", name, (unsigned long long) u);
720 case SD_BUS_TYPE_INT64: {
723 r = sd_bus_message_read_basic(property, type, &i);
727 printf("%s=%lld\n", name, (long long) i);
732 case SD_BUS_TYPE_UINT32: {
735 r = sd_bus_message_read_basic(property, type, &u);
739 if (strstr(name, "UMask") || strstr(name, "Mode"))
740 printf("%s=%04o\n", name, u);
742 printf("%s=%u\n", name, (unsigned) u);
747 case SD_BUS_TYPE_INT32: {
750 r = sd_bus_message_read_basic(property, type, &i);
754 printf("%s=%i\n", name, (int) i);
758 case SD_BUS_TYPE_DOUBLE: {
761 r = sd_bus_message_read_basic(property, type, &d);
765 printf("%s=%g\n", name, d);
769 case SD_BUS_TYPE_ARRAY:
770 if (streq(contents, "s")) {
774 r = sd_bus_message_enter_container(property, SD_BUS_TYPE_ARRAY, contents);
778 while((r = sd_bus_message_read_basic(property, SD_BUS_TYPE_STRING, &str)) > 0) {
779 _cleanup_free_ char *escaped = NULL;
784 escaped = xescape(str, "\n ");
788 printf("%s%s", first ? "" : " ", escaped);
800 r = sd_bus_message_exit_container(property);
806 } else if (streq(contents, "y")) {
810 r = sd_bus_message_read_array(property, SD_BUS_TYPE_BYTE, (const void**) &u, &n);
819 for (i = 0; i < n; i++)
820 printf("%02x", u[i]);
827 } else if (streq(contents, "u")) {
831 r = sd_bus_message_read_array(property, SD_BUS_TYPE_UINT32, (const void**) &u, &n);
840 for (i = 0; i < n; i++)
841 printf("%08x", u[i]);
855 int bus_print_all_properties(sd_bus *bus, const char *dest, const char *path, char **filter, bool all) {
856 _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
857 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
863 r = sd_bus_call_method(bus,
866 "org.freedesktop.DBus.Properties",
874 r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_ARRAY, "{sv}");
878 while ((r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_DICT_ENTRY, "sv")) > 0) {
880 const char *contents;
882 r = sd_bus_message_read_basic(reply, SD_BUS_TYPE_STRING, &name);
886 if (!filter || strv_find(filter, name)) {
887 r = sd_bus_message_peek_type(reply, NULL, &contents);
891 r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_VARIANT, contents);
895 r = bus_print_property(name, reply, all);
900 printf("%s=[unprintable]\n", name);
901 /* skip what we didn't read */
902 r = sd_bus_message_skip(reply, contents);
907 r = sd_bus_message_exit_container(reply);
911 r = sd_bus_message_skip(reply, "v");
916 r = sd_bus_message_exit_container(reply);
923 r = sd_bus_message_exit_container(reply);
930 int bus_map_id128(sd_bus *bus, const char *member, sd_bus_message *m, sd_bus_error *error, void *userdata) {
931 sd_id128_t *p = userdata;
936 r = sd_bus_message_read_array(m, SD_BUS_TYPE_BYTE, &v, &n);
943 memcpy((*p).bytes, v, n);
950 static int map_basic(sd_bus *bus, const char *member, sd_bus_message *m, sd_bus_error *error, void *userdata) {
954 r = sd_bus_message_peek_type(m, &type, NULL);
959 case SD_BUS_TYPE_STRING: {
963 r = sd_bus_message_read_basic(m, type, &s);
970 r = free_and_strdup(p, s);
974 case SD_BUS_TYPE_ARRAY: {
975 _cleanup_strv_free_ char **l = NULL;
976 char ***p = userdata;
978 r = bus_message_read_strv_extend(m, &l);
989 case SD_BUS_TYPE_BOOLEAN: {
993 r = sd_bus_message_read_basic(m, type, &b);
1002 case SD_BUS_TYPE_UINT32: {
1004 uint32_t *p = userdata;
1006 r = sd_bus_message_read_basic(m, type, &u);
1015 case SD_BUS_TYPE_UINT64: {
1017 uint64_t *p = userdata;
1019 r = sd_bus_message_read_basic(m, type, &t);
1035 int bus_message_map_all_properties(
1037 const struct bus_properties_map *map,
1040 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
1046 r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, "{sv}");
1050 while ((r = sd_bus_message_enter_container(m, SD_BUS_TYPE_DICT_ENTRY, "sv")) > 0) {
1051 const struct bus_properties_map *prop;
1053 const char *contents;
1057 r = sd_bus_message_read_basic(m, SD_BUS_TYPE_STRING, &member);
1061 for (i = 0, prop = NULL; map[i].member; i++)
1062 if (streq(map[i].member, member)) {
1068 r = sd_bus_message_peek_type(m, NULL, &contents);
1072 r = sd_bus_message_enter_container(m, SD_BUS_TYPE_VARIANT, contents);
1076 v = (uint8_t *)userdata + prop->offset;
1078 r = prop->set(sd_bus_message_get_bus(m), member, m, &error, v);
1080 r = map_basic(sd_bus_message_get_bus(m), member, m, &error, v);
1084 r = sd_bus_message_exit_container(m);
1088 r = sd_bus_message_skip(m, "v");
1093 r = sd_bus_message_exit_container(m);
1100 return sd_bus_message_exit_container(m);
1103 int bus_message_map_properties_changed(
1105 const struct bus_properties_map *map,
1109 int r, invalidated, i;
1114 r = bus_message_map_all_properties(m, map, userdata);
1118 r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, "s");
1123 while ((r = sd_bus_message_read_basic(m, SD_BUS_TYPE_STRING, &member)) > 0)
1124 for (i = 0; map[i].member; i++)
1125 if (streq(map[i].member, member)) {
1132 r = sd_bus_message_exit_container(m);
1139 int bus_map_all_properties(
1141 const char *destination,
1143 const struct bus_properties_map *map,
1146 _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
1147 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
1151 assert(destination);
1155 r = sd_bus_call_method(
1159 "org.freedesktop.DBus.Properties",
1167 return bus_message_map_all_properties(m, map, userdata);
1170 int bus_open_transport(BusTransport transport, const char *host, bool user, sd_bus **bus) {
1173 assert(transport >= 0);
1174 assert(transport < _BUS_TRANSPORT_MAX);
1177 assert_return((transport == BUS_TRANSPORT_LOCAL) == !host, -EINVAL);
1178 assert_return(transport == BUS_TRANSPORT_LOCAL || !user, -EOPNOTSUPP);
1180 switch (transport) {
1182 case BUS_TRANSPORT_LOCAL:
1184 r = sd_bus_default_user(bus);
1186 r = sd_bus_default_system(bus);
1190 case BUS_TRANSPORT_REMOTE:
1191 r = sd_bus_open_system_remote(bus, host);
1194 case BUS_TRANSPORT_MACHINE:
1195 r = sd_bus_open_system_machine(bus, host);
1199 assert_not_reached("Hmm, unknown transport type.");
1205 int bus_open_transport_systemd(BusTransport transport, const char *host, bool user, sd_bus **bus) {
1208 assert(transport >= 0);
1209 assert(transport < _BUS_TRANSPORT_MAX);
1212 assert_return((transport == BUS_TRANSPORT_LOCAL) == !host, -EINVAL);
1213 assert_return(transport == BUS_TRANSPORT_LOCAL || !user, -EOPNOTSUPP);
1215 switch (transport) {
1217 case BUS_TRANSPORT_LOCAL:
1219 r = bus_open_user_systemd(bus);
1221 r = bus_open_system_systemd(bus);
1225 case BUS_TRANSPORT_REMOTE:
1226 r = sd_bus_open_system_remote(bus, host);
1229 case BUS_TRANSPORT_MACHINE:
1230 r = sd_bus_open_system_machine(bus, host);
1234 assert_not_reached("Hmm, unknown transport type.");
1240 int bus_property_get_bool(
1243 const char *interface,
1244 const char *property,
1245 sd_bus_message *reply,
1247 sd_bus_error *error) {
1249 int b = *(bool*) userdata;
1251 return sd_bus_message_append_basic(reply, 'b', &b);
1254 #if __SIZEOF_SIZE_T__ != 8
1255 int bus_property_get_size(
1258 const char *interface,
1259 const char *property,
1260 sd_bus_message *reply,
1262 sd_bus_error *error) {
1264 uint64_t sz = *(size_t*) userdata;
1266 return sd_bus_message_append_basic(reply, 't', &sz);
1270 #if __SIZEOF_LONG__ != 8
1271 int bus_property_get_long(
1274 const char *interface,
1275 const char *property,
1276 sd_bus_message *reply,
1278 sd_bus_error *error) {
1280 int64_t l = *(long*) userdata;
1282 return sd_bus_message_append_basic(reply, 'x', &l);
1285 int bus_property_get_ulong(
1288 const char *interface,
1289 const char *property,
1290 sd_bus_message *reply,
1292 sd_bus_error *error) {
1294 uint64_t ul = *(unsigned long*) userdata;
1296 return sd_bus_message_append_basic(reply, 't', &ul);
1300 int bus_log_parse_error(int r) {
1301 return log_error_errno(r, "Failed to parse bus message: %m");
1304 int bus_log_create_error(int r) {
1305 return log_error_errno(r, "Failed to create bus message: %m");
1308 int bus_parse_unit_info(sd_bus_message *message, UnitInfo *u) {
1314 return sd_bus_message_read(
1329 int bus_append_unit_property_assignment(sd_bus_message *m, const char *assignment) {
1330 const char *eq, *field;
1336 eq = strchr(assignment, '=');
1338 log_error("Not an assignment: %s", assignment);
1342 field = strndupa(assignment, eq - assignment);
1345 if (streq(field, "CPUQuota")) {
1349 r = sd_bus_message_append_basic(m, SD_BUS_TYPE_STRING, "CPUQuotaPerSecUSec");
1351 return bus_log_create_error(r);
1353 r = sd_bus_message_append(m, "v", "t", USEC_INFINITY);
1355 } else if (endswith(eq, "%")) {
1358 if (sscanf(eq, "%lf%%", &percent) != 1 || percent <= 0) {
1359 log_error("CPU quota '%s' invalid.", eq);
1363 r = sd_bus_message_append_basic(m, SD_BUS_TYPE_STRING, "CPUQuotaPerSecUSec");
1365 return bus_log_create_error(r);
1367 r = sd_bus_message_append(m, "v", "t", (usec_t) percent * USEC_PER_SEC / 100);
1369 log_error("CPU quota needs to be in percent.");
1374 return bus_log_create_error(r);
1379 r = sd_bus_message_append_basic(m, SD_BUS_TYPE_STRING, field);
1381 return bus_log_create_error(r);
1383 if (STR_IN_SET(field,
1384 "CPUAccounting", "MemoryAccounting", "BlockIOAccounting",
1385 "SendSIGHUP", "SendSIGKILL", "WakeSystem", "DefaultDependencies")) {
1387 r = parse_boolean(eq);
1389 log_error("Failed to parse boolean assignment %s.", assignment);
1393 r = sd_bus_message_append(m, "v", "b", r);
1395 } else if (streq(field, "MemoryLimit")) {
1398 r = parse_size(eq, 1024, &bytes);
1400 log_error("Failed to parse bytes specification %s", assignment);
1404 r = sd_bus_message_append(m, "v", "t", (uint64_t) bytes);
1406 } else if (STR_IN_SET(field, "CPUShares", "BlockIOWeight")) {
1409 r = safe_atou64(eq, &u);
1411 log_error("Failed to parse %s value %s.", field, eq);
1415 r = sd_bus_message_append(m, "v", "t", u);
1417 } else if (STR_IN_SET(field, "User", "Group", "DevicePolicy", "KillMode"))
1418 r = sd_bus_message_append(m, "v", "s", eq);
1420 else if (streq(field, "DeviceAllow")) {
1423 r = sd_bus_message_append(m, "v", "a(ss)", 0);
1425 const char *path, *rwm, *e;
1427 e = strchr(eq, ' ');
1429 path = strndupa(eq, e - eq);
1436 if (!path_startswith(path, "/dev")) {
1437 log_error("%s is not a device file in /dev.", path);
1441 r = sd_bus_message_append(m, "v", "a(ss)", 1, path, rwm);
1444 } else if (STR_IN_SET(field, "BlockIOReadBandwidth", "BlockIOWriteBandwidth")) {
1447 r = sd_bus_message_append(m, "v", "a(st)", 0);
1449 const char *path, *bandwidth, *e;
1452 e = strchr(eq, ' ');
1454 path = strndupa(eq, e - eq);
1457 log_error("Failed to parse %s value %s.", field, eq);
1461 if (!path_startswith(path, "/dev")) {
1462 log_error("%s is not a device file in /dev.", path);
1466 r = parse_size(bandwidth, 1000, &bytes);
1468 log_error("Failed to parse byte value %s.", bandwidth);
1472 r = sd_bus_message_append(m, "v", "a(st)", 1, path, (uint64_t) bytes);
1475 } else if (streq(field, "BlockIODeviceWeight")) {
1478 r = sd_bus_message_append(m, "v", "a(st)", 0);
1480 const char *path, *weight, *e;
1483 e = strchr(eq, ' ');
1485 path = strndupa(eq, e - eq);
1488 log_error("Failed to parse %s value %s.", field, eq);
1492 if (!path_startswith(path, "/dev")) {
1493 log_error("%s is not a device file in /dev.", path);
1497 r = safe_atou64(weight, &u);
1499 log_error("Failed to parse %s value %s.", field, weight);
1502 r = sd_bus_message_append(m, "v", "a(st)", path, u);
1505 } else if (rlimit_from_string(field) >= 0) {
1508 if (streq(eq, "infinity"))
1511 r = safe_atou64(eq, &rl);
1513 log_error("Invalid resource limit: %s", eq);
1518 r = sd_bus_message_append(m, "v", "t", rl);
1520 } else if (streq(field, "Nice")) {
1523 r = safe_atoi32(eq, &i);
1525 log_error("Failed to parse %s value %s.", field, eq);
1529 r = sd_bus_message_append(m, "v", "i", i);
1531 } else if (streq(field, "Environment")) {
1533 r = sd_bus_message_append(m, "v", "as", 1, eq);
1535 } else if (streq(field, "KillSignal")) {
1538 sig = signal_from_string_try_harder(eq);
1540 log_error("Failed to parse %s value %s.", field, eq);
1544 r = sd_bus_message_append(m, "v", "i", sig);
1546 } else if (streq(field, "AccuracySec")) {
1549 r = parse_sec(eq, &u);
1551 log_error("Failed to parse %s value %s", field, eq);
1555 r = sd_bus_message_append(m, "v", "t", u);
1558 log_error("Unknown assignment %s.", assignment);
1563 return bus_log_create_error(r);
1568 typedef struct BusWaitForJobs {
1575 sd_bus_slot *slot_job_removed;
1576 sd_bus_slot *slot_disconnected;
1579 static int match_disconnected(sd_bus_message *m, void *userdata, sd_bus_error *error) {
1582 log_error("Warning! D-Bus connection terminated.");
1583 sd_bus_close(sd_bus_message_get_bus(m));
1588 static int match_job_removed(sd_bus_message *m, void *userdata, sd_bus_error *error) {
1589 const char *path, *unit, *result;
1590 BusWaitForJobs *d = userdata;
1598 r = sd_bus_message_read(m, "uoss", &id, &path, &unit, &result);
1600 bus_log_parse_error(r);
1604 found = set_remove(d->jobs, (char*) path);
1610 if (!isempty(result))
1611 d->result = strdup(result);
1614 d->name = strdup(unit);
1619 void bus_wait_for_jobs_free(BusWaitForJobs *d) {
1623 set_free_free(d->jobs);
1625 sd_bus_slot_unref(d->slot_disconnected);
1626 sd_bus_slot_unref(d->slot_job_removed);
1628 sd_bus_unref(d->bus);
1636 int bus_wait_for_jobs_new(sd_bus *bus, BusWaitForJobs **ret) {
1637 _cleanup_(bus_wait_for_jobs_freep) BusWaitForJobs *d = NULL;
1643 d = new0(BusWaitForJobs, 1);
1647 d->bus = sd_bus_ref(bus);
1649 /* When we are a bus client we match by sender. Direct
1650 * connections OTOH have no initialized sender field, and
1651 * hence we ignore the sender then */
1652 r = sd_bus_add_match(
1654 &d->slot_job_removed,
1657 "sender='org.freedesktop.systemd1',"
1658 "interface='org.freedesktop.systemd1.Manager',"
1659 "member='JobRemoved',"
1660 "path='/org/freedesktop/systemd1'" :
1662 "interface='org.freedesktop.systemd1.Manager',"
1663 "member='JobRemoved',"
1664 "path='/org/freedesktop/systemd1'",
1665 match_job_removed, d);
1669 r = sd_bus_add_match(
1671 &d->slot_disconnected,
1673 "sender='org.freedesktop.DBus.Local',"
1674 "interface='org.freedesktop.DBus.Local',"
1675 "member='Disconnected'",
1676 match_disconnected, d);
1686 static int bus_process_wait(sd_bus *bus) {
1690 r = sd_bus_process(bus, NULL);
1696 r = sd_bus_wait(bus, (uint64_t) -1);
1702 static int bus_job_get_service_result(BusWaitForJobs *d, char **result) {
1703 _cleanup_free_ char *dbus_path = NULL;
1709 dbus_path = unit_dbus_path_from_name(d->name);
1713 return sd_bus_get_property_string(d->bus,
1714 "org.freedesktop.systemd1",
1716 "org.freedesktop.systemd1.Service",
1722 static const struct {
1723 const char *result, *explanation;
1724 } explanations [] = {
1725 { "resources", "a configured resource limit was exceeded" },
1726 { "timeout", "a timeout was exceeded" },
1727 { "exit-code", "the control process exited with error code" },
1728 { "signal", "a fatal signal was delivered to the control process" },
1729 { "core-dump", "a fatal signal was delivered causing the control process to dump core" },
1730 { "watchdog", "the service failed to send watchdog ping" },
1731 { "start-limit", "start of the service was attempted too often" }
1734 static void log_job_error_with_service_result(const char* service, const char *result) {
1735 _cleanup_free_ char *service_shell_quoted = NULL;
1739 service_shell_quoted = shell_maybe_quote(service);
1741 if (!isempty(result)) {
1744 for (i = 0; i < ELEMENTSOF(explanations); ++i)
1745 if (streq(result, explanations[i].result))
1748 if (i < ELEMENTSOF(explanations)) {
1749 log_error("Job for %s failed because %s. See \"systemctl status %s\" and \"journalctl -xe\" for details.\n",
1751 explanations[i].explanation,
1752 strna(service_shell_quoted));
1758 log_error("Job for %s failed. See \"systemctl status %s\" and \"journalctl -xe\" for details.\n",
1760 strna(service_shell_quoted));
1763 /* For some results maybe additional explanation is required */
1764 if (streq_ptr(result, "start-limit"))
1765 log_info("To force a start use \"systemctl reset-failed %1$s\" followed by \"systemctl start %1$s\" again.",
1766 strna(service_shell_quoted));
1769 static int check_wait_response(BusWaitForJobs *d, bool quiet) {
1775 if (streq(d->result, "canceled"))
1776 log_error("Job for %s canceled.", strna(d->name));
1777 else if (streq(d->result, "timeout"))
1778 log_error("Job for %s timed out.", strna(d->name));
1779 else if (streq(d->result, "dependency"))
1780 log_error("A dependency job for %s failed. See 'journalctl -xe' for details.", strna(d->name));
1781 else if (streq(d->result, "invalid"))
1782 log_error("Job for %s invalid.", strna(d->name));
1783 else if (streq(d->result, "assert"))
1784 log_error("Assertion failed on job for %s.", strna(d->name));
1785 else if (streq(d->result, "unsupported"))
1786 log_error("Operation on or unit type of %s not supported on this system.", strna(d->name));
1787 else if (!streq(d->result, "done") && !streq(d->result, "skipped")) {
1790 _cleanup_free_ char *result = NULL;
1792 q = bus_job_get_service_result(d, &result);
1794 log_debug_errno(q, "Failed to get Result property of service %s: %m", d->name);
1796 log_job_error_with_service_result(d->name, result);
1798 log_error("Job failed. See \"journalctl -xe\" for details.");
1802 if (streq(d->result, "canceled"))
1804 else if (streq(d->result, "timeout"))
1806 else if (streq(d->result, "dependency"))
1808 else if (streq(d->result, "invalid"))
1810 else if (streq(d->result, "assert"))
1812 else if (streq(d->result, "unsupported"))
1814 else if (!streq(d->result, "done") && !streq(d->result, "skipped"))
1820 int bus_wait_for_jobs(BusWaitForJobs *d, bool quiet) {
1825 while (!set_isempty(d->jobs)) {
1828 q = bus_process_wait(d->bus);
1830 return log_error_errno(q, "Failed to wait for response: %m");
1833 q = check_wait_response(d, quiet);
1834 /* Return the first error as it is most likely to be
1836 if (q < 0 && r == 0)
1839 log_debug_errno(q, "Got result %s/%m for job %s", strna(d->result), strna(d->name));
1852 int bus_wait_for_jobs_add(BusWaitForJobs *d, const char *path) {
1857 r = set_ensure_allocated(&d->jobs, &string_hash_ops);
1861 return set_put_strdup(d->jobs, path);
1864 /// UNNEEDED by elogind
1866 int bus_deserialize_and_dump_unit_file_changes(sd_bus_message *m, bool quiet, UnitFileChange **changes, unsigned *n_changes) {
1867 const char *type, *path, *source;
1870 r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, "(sss)");
1872 return bus_log_parse_error(r);
1874 while ((r = sd_bus_message_read(m, "(sss)", &type, &path, &source)) > 0) {
1876 if (streq(type, "symlink"))
1877 log_info("Created symlink from %s to %s.", path, source);
1879 log_info("Removed symlink %s.", path);
1882 r = unit_file_changes_add(changes, n_changes, streq(type, "symlink") ? UNIT_FILE_SYMLINK : UNIT_FILE_UNLINK, path, source);
1887 return bus_log_parse_error(r);
1889 r = sd_bus_message_exit_container(m);
1891 return bus_log_parse_error(r);
1898 * bus_path_encode_unique() - encode unique object path
1899 * @b: bus connection or NULL
1900 * @prefix: object path prefix
1901 * @sender_id: unique-name of client, or NULL
1902 * @external_id: external ID to be chosen by client, or NULL
1903 * @ret_path: storage for encoded object path pointer
1905 * Whenever we provide a bus API that allows clients to create and manage
1906 * server-side objects, we need to provide a unique name for these objects. If
1907 * we let the server choose the name, we suffer from a race condition: If a
1908 * client creates an object asynchronously, it cannot destroy that object until
1909 * it received the method reply. It cannot know the name of the new object,
1910 * thus, it cannot destroy it. Furthermore, it enforces a round-trip.
1912 * Therefore, many APIs allow the client to choose the unique name for newly
1913 * created objects. There're two problems to solve, though:
1914 * 1) Object names are usually defined via dbus object paths, which are
1915 * usually globally namespaced. Therefore, multiple clients must be able
1916 * to choose unique object names without interference.
1917 * 2) If multiple libraries share the same bus connection, they must be
1918 * able to choose unique object names without interference.
1919 * The first problem is solved easily by prefixing a name with the
1920 * unique-bus-name of a connection. The server side must enforce this and
1921 * reject any other name. The second problem is solved by providing unique
1922 * suffixes from within sd-bus.
1924 * This helper allows clients to create unique object-paths. It uses the
1925 * template '/prefix/sender_id/external_id' and returns the new path in
1926 * @ret_path (must be freed by the caller).
1927 * If @sender_id is NULL, the unique-name of @b is used. If @external_id is
1928 * NULL, this function allocates a unique suffix via @b (by requesting a new
1929 * cookie). If both @sender_id and @external_id are given, @b can be passed as
1932 * Returns: 0 on success, negative error code on failure.
1934 int bus_path_encode_unique(sd_bus *b, const char *prefix, const char *sender_id, const char *external_id, char **ret_path) {
1935 _cleanup_free_ char *sender_label = NULL, *external_label = NULL;
1936 char external_buf[DECIMAL_STR_MAX(uint64_t)], *p;
1939 assert_return(b || (sender_id && external_id), -EINVAL);
1940 assert_return(object_path_is_valid(prefix), -EINVAL);
1941 assert_return(ret_path, -EINVAL);
1944 r = sd_bus_get_unique_name(b, &sender_id);
1950 xsprintf(external_buf, "%"PRIu64, ++b->cookie);
1951 external_id = external_buf;
1954 sender_label = bus_label_escape(sender_id);
1958 external_label = bus_label_escape(external_id);
1959 if (!external_label)
1962 p = strjoin(prefix, "/", sender_label, "/", external_label, NULL);
1971 * bus_path_decode_unique() - decode unique object path
1972 * @path: object path to decode
1973 * @prefix: object path prefix
1974 * @ret_sender: output parameter for sender-id label
1975 * @ret_external: output parameter for external-id label
1977 * This does the reverse of bus_path_encode_unique() (see its description for
1978 * details). Both trailing labels, sender-id and external-id, are unescaped and
1979 * returned in the given output parameters (the caller must free them).
1981 * Note that this function returns 0 if the path does not match the template
1982 * (see bus_path_encode_unique()), 1 if it matched.
1984 * Returns: Negative error code on failure, 0 if the given object path does not
1985 * match the template (return parameters are set to NULL), 1 if it was
1986 * parsed successfully (return parameters contain allocated labels).
1988 int bus_path_decode_unique(const char *path, const char *prefix, char **ret_sender, char **ret_external) {
1990 char *sender, *external;
1992 assert(object_path_is_valid(path));
1993 assert(object_path_is_valid(prefix));
1995 assert(ret_external);
1997 p = object_path_startswith(path, prefix);
2000 *ret_external = NULL;
2007 *ret_external = NULL;
2011 sender = bus_label_unescape_n(p, q - p);
2012 external = bus_label_unescape(q + 1);
2013 if (!sender || !external) {
2019 *ret_sender = sender;
2020 *ret_external = external;
2024 bool is_kdbus_wanted(void) {
2025 _cleanup_free_ char *value = NULL;
2027 const bool configured = true;
2029 const bool configured = false;
2034 if (get_proc_cmdline_key("kdbus", NULL) > 0)
2037 r = get_proc_cmdline_key("kdbus=", &value);
2041 return parse_boolean(value) == 1;
2044 bool is_kdbus_available(void) {
2045 _cleanup_close_ int fd = -1;
2046 struct kdbus_cmd cmd = { .size = sizeof(cmd), .flags = KDBUS_FLAG_NEGOTIATE };
2048 if (!is_kdbus_wanted())
2051 fd = open("/sys/fs/kdbus/control", O_RDWR | O_CLOEXEC | O_NONBLOCK | O_NOCTTY);
2055 return ioctl(fd, KDBUS_CMD_BUS_MAKE, &cmd) >= 0;