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>
25 #include "sd-daemon.h"
28 #include "alloc-util.h"
29 #include "bus-error.h"
30 #include "bus-internal.h"
31 #include "bus-label.h"
32 #include "bus-message.h"
34 #include "cgroup-util.h"
36 //#include "env-util.h"
41 #include "parse-util.h"
42 #include "path-util.h"
43 #include "proc-cmdline.h"
44 #include "process-util.h"
45 //#include "rlimit-util.h"
47 #include "signal-util.h"
48 #include "stdio-util.h"
49 #include "string-util.h"
51 #include "syslog-util.h"
52 #include "unit-name.h"
53 #include "user-util.h"
57 #if 0 /// UNNEEDED by elogind
58 static int name_owner_change_callback(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
59 sd_event *e = userdata;
64 sd_bus_close(sd_bus_message_get_bus(m));
70 int bus_async_unregister_and_exit(sd_event *e, sd_bus *bus, const char *name) {
71 _cleanup_free_ char *match = NULL;
79 /* We unregister the name here and then wait for the
80 * NameOwnerChanged signal for this event to arrive before we
81 * quit. We do this in order to make sure that any queued
82 * requests are still processed before we really exit. */
84 r = sd_bus_get_unique_name(bus, &unique);
89 "sender='org.freedesktop.DBus',"
91 "interface='org.freedesktop.DBus',"
92 "member='NameOwnerChanged',"
93 "path='/org/freedesktop/DBus',"
96 "arg2=''", name, unique);
100 r = sd_bus_add_match(bus, NULL, match, name_owner_change_callback, e);
104 r = sd_bus_release_name(bus, name);
111 int bus_event_loop_with_idle(
116 check_idle_t check_idle,
118 bool exiting = false;
128 r = sd_event_get_state(e);
131 if (r == SD_EVENT_FINISHED)
135 idle = check_idle(userdata);
139 r = sd_event_run(e, exiting || !idle ? (uint64_t) -1 : timeout);
143 if (r == 0 && !exiting && idle) {
145 r = sd_bus_try_close(bus);
149 /* Fallback for dbus1 connections: we
150 * unregister the name and wait for the
151 * response to come through for it */
152 if (r == -EOPNOTSUPP) {
154 /* Inform the service manager that we
155 * are going down, so that it will
156 * queue all further start requests,
157 * instead of assuming we are already
159 sd_notify(false, "STOPPING=1");
161 r = bus_async_unregister_and_exit(e, bus, name);
177 r = sd_event_get_exit_code(e, &code);
185 int bus_name_has_owner(sd_bus *c, const char *name, sd_bus_error *error) {
186 _cleanup_bus_message_unref_ sd_bus_message *rep = NULL;
187 int r, has_owner = 0;
192 r = sd_bus_call_method(c,
193 "org.freedesktop.DBus",
194 "/org/freedesktop/dbus",
195 "org.freedesktop.DBus",
204 r = sd_bus_message_read_basic(rep, 'b', &has_owner);
206 return sd_bus_error_set_errno(error, r);
211 static int check_good_user(sd_bus_message *m, uid_t good_user) {
212 _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
218 if (good_user == UID_INVALID)
221 r = sd_bus_query_sender_creds(m, SD_BUS_CREDS_EUID, &creds);
225 /* Don't trust augmented credentials for authorization */
226 assert_return((sd_bus_creds_get_augmented_mask(creds) & SD_BUS_CREDS_EUID) == 0, -EPERM);
228 r = sd_bus_creds_get_euid(creds, &sender_uid);
232 return sender_uid == good_user;
236 sd_bus_message *call,
239 const char **details,
249 /* Tests non-interactively! */
251 r = check_good_user(call, good_user);
255 r = sd_bus_query_sender_privilege(call, capability);
262 _cleanup_bus_message_unref_ sd_bus_message *request = NULL;
263 _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
264 int authorized = false, challenge = false;
265 const char *sender, **k, **v;
267 sender = sd_bus_message_get_sender(call);
271 r = sd_bus_message_new_method_call(
274 "org.freedesktop.PolicyKit1",
275 "/org/freedesktop/PolicyKit1/Authority",
276 "org.freedesktop.PolicyKit1.Authority",
277 "CheckAuthorization");
281 r = sd_bus_message_append(
284 "system-bus-name", 1, "name", "s", sender,
289 r = sd_bus_message_open_container(request, 'a', "{ss}");
293 STRV_FOREACH_PAIR(k, v, details) {
294 r = sd_bus_message_append(request, "{ss}", *k, *v);
299 r = sd_bus_message_close_container(request);
303 r = sd_bus_message_append(request, "us", 0, NULL);
307 r = sd_bus_call(call->bus, request, 0, e, &reply);
309 /* Treat no PK available as access denied */
310 if (sd_bus_error_has_name(e, SD_BUS_ERROR_SERVICE_UNKNOWN)) {
311 sd_bus_error_free(e);
318 r = sd_bus_message_enter_container(reply, 'r', "bba{ss}");
322 r = sd_bus_message_read(reply, "bb", &authorized, &challenge);
330 *_challenge = challenge;
341 typedef struct AsyncPolkitQuery {
342 sd_bus_message *request, *reply;
343 sd_bus_message_handler_t callback;
349 static void async_polkit_query_free(AsyncPolkitQuery *q) {
354 sd_bus_slot_unref(q->slot);
356 if (q->registry && q->request)
357 hashmap_remove(q->registry, q->request);
359 sd_bus_message_unref(q->request);
360 sd_bus_message_unref(q->reply);
365 static int async_polkit_callback(sd_bus_message *reply, void *userdata, sd_bus_error *error) {
366 _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL;
367 AsyncPolkitQuery *q = userdata;
373 q->slot = sd_bus_slot_unref(q->slot);
374 q->reply = sd_bus_message_ref(reply);
376 r = sd_bus_message_rewind(q->request, true);
378 r = sd_bus_reply_method_errno(q->request, r, NULL);
382 r = q->callback(q->request, q->userdata, &error_buffer);
383 r = bus_maybe_reply_error(q->request, r, &error_buffer);
386 async_polkit_query_free(q);
393 int bus_verify_polkit_async(
394 sd_bus_message *call,
397 const char **details,
401 sd_bus_error *error) {
404 _cleanup_bus_message_unref_ sd_bus_message *pk = NULL;
406 const char *sender, **k, **v;
407 sd_bus_message_handler_t callback;
417 r = check_good_user(call, good_user);
422 q = hashmap_get(*registry, call);
424 int authorized, challenge;
426 /* This is the second invocation of this function, and
427 * there's already a response from polkit, let's
431 if (sd_bus_message_is_method_error(q->reply, NULL)) {
432 const sd_bus_error *e;
434 /* Copy error from polkit reply */
435 e = sd_bus_message_get_error(q->reply);
436 sd_bus_error_copy(error, e);
438 /* Treat no PK available as access denied */
439 if (sd_bus_error_has_name(e, SD_BUS_ERROR_SERVICE_UNKNOWN))
442 return -sd_bus_error_get_errno(e);
445 r = sd_bus_message_enter_container(q->reply, 'r', "bba{ss}");
447 r = sd_bus_message_read(q->reply, "bb", &authorized, &challenge);
456 return sd_bus_error_set(error, SD_BUS_ERROR_INTERACTIVE_AUTHORIZATION_REQUIRED, "Interactive authentication required.");
462 r = sd_bus_query_sender_privilege(call, capability);
469 if (sd_bus_get_current_message(call->bus) != call)
472 callback = sd_bus_get_current_handler(call->bus);
476 userdata = sd_bus_get_current_userdata(call->bus);
478 sender = sd_bus_message_get_sender(call);
482 c = sd_bus_message_get_allow_interactive_authorization(call);
488 r = hashmap_ensure_allocated(registry, NULL);
492 r = sd_bus_message_new_method_call(
495 "org.freedesktop.PolicyKit1",
496 "/org/freedesktop/PolicyKit1/Authority",
497 "org.freedesktop.PolicyKit1.Authority",
498 "CheckAuthorization");
502 r = sd_bus_message_append(
505 "system-bus-name", 1, "name", "s", sender,
510 r = sd_bus_message_open_container(pk, 'a', "{ss}");
514 STRV_FOREACH_PAIR(k, v, details) {
515 r = sd_bus_message_append(pk, "{ss}", *k, *v);
520 r = sd_bus_message_close_container(pk);
524 r = sd_bus_message_append(pk, "us", !!interactive, NULL);
528 q = new0(AsyncPolkitQuery, 1);
532 q->request = sd_bus_message_ref(call);
533 q->callback = callback;
534 q->userdata = userdata;
536 r = hashmap_put(*registry, call, q);
538 async_polkit_query_free(q);
542 q->registry = *registry;
544 r = sd_bus_call_async(call->bus, &q->slot, pk, async_polkit_callback, q, 0);
546 async_polkit_query_free(q);
556 void bus_verify_polkit_async_registry_free(Hashmap *registry) {
560 while ((q = hashmap_steal_first(registry)))
561 async_polkit_query_free(q);
563 hashmap_free(registry);
567 #if 0 /// UNNEEDED by elogind
568 int bus_check_peercred(sd_bus *c) {
575 fd = sd_bus_get_fd(c);
579 l = sizeof(struct ucred);
580 if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l) < 0)
583 if (l != sizeof(struct ucred))
586 if (ucred.uid != 0 && ucred.uid != geteuid())
592 int bus_connect_system_systemd(sd_bus **_bus) {
593 _cleanup_bus_unref_ sd_bus *bus = NULL;
599 return sd_bus_default_system(_bus);
601 /* If we are root and kdbus is not available, then let's talk
602 * directly to the system instance, instead of going via the
605 r = sd_bus_new(&bus);
609 r = sd_bus_set_address(bus, KERNEL_SYSTEM_BUS_ADDRESS);
613 bus->bus_client = true;
615 r = sd_bus_start(bus);
622 bus = sd_bus_unref(bus);
624 r = sd_bus_new(&bus);
628 r = sd_bus_set_address(bus, "unix:path=/run/systemd/private");
632 r = sd_bus_start(bus);
634 return sd_bus_default_system(_bus);
636 r = bus_check_peercred(bus);
646 int bus_connect_user_systemd(sd_bus **_bus) {
647 _cleanup_bus_unref_ sd_bus *bus = NULL;
648 _cleanup_free_ char *ee = NULL;
652 /* Try via kdbus first, and then directly */
656 r = sd_bus_new(&bus);
660 if (asprintf(&bus->address, KERNEL_USER_BUS_ADDRESS_FMT, getuid()) < 0)
663 bus->bus_client = true;
665 r = sd_bus_start(bus);
672 bus = sd_bus_unref(bus);
674 e = secure_getenv("XDG_RUNTIME_DIR");
676 return sd_bus_default_user(_bus);
678 ee = bus_address_escape(e);
682 r = sd_bus_new(&bus);
686 bus->address = strjoin("unix:path=", ee, "/systemd/private", NULL);
690 r = sd_bus_start(bus);
692 return sd_bus_default_user(_bus);
694 r = bus_check_peercred(bus);
705 int bus_print_property(const char *name, sd_bus_message *property, bool all) {
707 const char *contents;
713 r = sd_bus_message_peek_type(property, &type, &contents);
719 case SD_BUS_TYPE_STRING: {
722 r = sd_bus_message_read_basic(property, type, &s);
726 if (all || !isempty(s)) {
727 _cleanup_free_ char *escaped = NULL;
729 escaped = xescape(s, "\n");
733 printf("%s=%s\n", name, escaped);
739 case SD_BUS_TYPE_BOOLEAN: {
742 r = sd_bus_message_read_basic(property, type, &b);
746 printf("%s=%s\n", name, yes_no(b));
751 case SD_BUS_TYPE_UINT64: {
754 r = sd_bus_message_read_basic(property, type, &u);
758 /* Yes, heuristics! But we can change this check
759 * should it turn out to not be sufficient */
761 if (endswith(name, "Timestamp")) {
762 char timestamp[FORMAT_TIMESTAMP_MAX], *t;
764 t = format_timestamp(timestamp, sizeof(timestamp), u);
766 printf("%s=%s\n", name, strempty(t));
768 } else if (strstr(name, "USec")) {
769 char timespan[FORMAT_TIMESPAN_MAX];
771 printf("%s=%s\n", name, format_timespan(timespan, sizeof(timespan), u, 0));
773 printf("%s=%llu\n", name, (unsigned long long) u);
778 case SD_BUS_TYPE_INT64: {
781 r = sd_bus_message_read_basic(property, type, &i);
785 printf("%s=%lld\n", name, (long long) i);
790 case SD_BUS_TYPE_UINT32: {
793 r = sd_bus_message_read_basic(property, type, &u);
797 if (strstr(name, "UMask") || strstr(name, "Mode"))
798 printf("%s=%04o\n", name, u);
800 printf("%s=%u\n", name, (unsigned) u);
805 case SD_BUS_TYPE_INT32: {
808 r = sd_bus_message_read_basic(property, type, &i);
812 printf("%s=%i\n", name, (int) i);
816 case SD_BUS_TYPE_DOUBLE: {
819 r = sd_bus_message_read_basic(property, type, &d);
823 printf("%s=%g\n", name, d);
827 case SD_BUS_TYPE_ARRAY:
828 if (streq(contents, "s")) {
832 r = sd_bus_message_enter_container(property, SD_BUS_TYPE_ARRAY, contents);
836 while((r = sd_bus_message_read_basic(property, SD_BUS_TYPE_STRING, &str)) > 0) {
837 _cleanup_free_ char *escaped = NULL;
842 escaped = xescape(str, "\n ");
846 printf("%s%s", first ? "" : " ", escaped);
858 r = sd_bus_message_exit_container(property);
864 } else if (streq(contents, "y")) {
868 r = sd_bus_message_read_array(property, SD_BUS_TYPE_BYTE, (const void**) &u, &n);
877 for (i = 0; i < n; i++)
878 printf("%02x", u[i]);
885 } else if (streq(contents, "u")) {
889 r = sd_bus_message_read_array(property, SD_BUS_TYPE_UINT32, (const void**) &u, &n);
898 for (i = 0; i < n; i++)
899 printf("%08x", u[i]);
913 int bus_print_all_properties(sd_bus *bus, const char *dest, const char *path, char **filter, bool all) {
914 _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
915 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
921 r = sd_bus_call_method(bus,
924 "org.freedesktop.DBus.Properties",
932 r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_ARRAY, "{sv}");
936 while ((r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_DICT_ENTRY, "sv")) > 0) {
938 const char *contents;
940 r = sd_bus_message_read_basic(reply, SD_BUS_TYPE_STRING, &name);
944 if (!filter || strv_find(filter, name)) {
945 r = sd_bus_message_peek_type(reply, NULL, &contents);
949 r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_VARIANT, contents);
953 r = bus_print_property(name, reply, all);
958 printf("%s=[unprintable]\n", name);
959 /* skip what we didn't read */
960 r = sd_bus_message_skip(reply, contents);
965 r = sd_bus_message_exit_container(reply);
969 r = sd_bus_message_skip(reply, "v");
974 r = sd_bus_message_exit_container(reply);
981 r = sd_bus_message_exit_container(reply);
988 int bus_map_id128(sd_bus *bus, const char *member, sd_bus_message *m, sd_bus_error *error, void *userdata) {
989 sd_id128_t *p = userdata;
994 r = sd_bus_message_read_array(m, SD_BUS_TYPE_BYTE, &v, &n);
1001 memcpy((*p).bytes, v, n);
1008 static int map_basic(sd_bus *bus, const char *member, sd_bus_message *m, sd_bus_error *error, void *userdata) {
1012 r = sd_bus_message_peek_type(m, &type, NULL);
1017 case SD_BUS_TYPE_STRING: {
1019 char **p = userdata;
1021 r = sd_bus_message_read_basic(m, type, &s);
1028 r = free_and_strdup(p, s);
1032 case SD_BUS_TYPE_ARRAY: {
1033 _cleanup_strv_free_ char **l = NULL;
1034 char ***p = userdata;
1036 r = bus_message_read_strv_extend(m, &l);
1047 case SD_BUS_TYPE_BOOLEAN: {
1051 r = sd_bus_message_read_basic(m, type, &b);
1060 case SD_BUS_TYPE_UINT32: {
1062 uint32_t *p = userdata;
1064 r = sd_bus_message_read_basic(m, type, &u);
1073 case SD_BUS_TYPE_UINT64: {
1075 uint64_t *p = userdata;
1077 r = sd_bus_message_read_basic(m, type, &t);
1093 int bus_message_map_all_properties(
1095 const struct bus_properties_map *map,
1098 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
1104 r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, "{sv}");
1108 while ((r = sd_bus_message_enter_container(m, SD_BUS_TYPE_DICT_ENTRY, "sv")) > 0) {
1109 const struct bus_properties_map *prop;
1111 const char *contents;
1115 r = sd_bus_message_read_basic(m, SD_BUS_TYPE_STRING, &member);
1119 for (i = 0, prop = NULL; map[i].member; i++)
1120 if (streq(map[i].member, member)) {
1126 r = sd_bus_message_peek_type(m, NULL, &contents);
1130 r = sd_bus_message_enter_container(m, SD_BUS_TYPE_VARIANT, contents);
1134 v = (uint8_t *)userdata + prop->offset;
1136 r = prop->set(sd_bus_message_get_bus(m), member, m, &error, v);
1138 r = map_basic(sd_bus_message_get_bus(m), member, m, &error, v);
1142 r = sd_bus_message_exit_container(m);
1146 r = sd_bus_message_skip(m, "v");
1151 r = sd_bus_message_exit_container(m);
1158 return sd_bus_message_exit_container(m);
1161 #if 0 /// UNNEEDED by elogind
1162 int bus_message_map_properties_changed(
1164 const struct bus_properties_map *map,
1168 int r, invalidated, i;
1173 r = bus_message_map_all_properties(m, map, userdata);
1177 r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, "s");
1182 while ((r = sd_bus_message_read_basic(m, SD_BUS_TYPE_STRING, &member)) > 0)
1183 for (i = 0; map[i].member; i++)
1184 if (streq(map[i].member, member)) {
1191 r = sd_bus_message_exit_container(m);
1199 int bus_map_all_properties(
1201 const char *destination,
1203 const struct bus_properties_map *map,
1206 _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
1207 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
1211 assert(destination);
1215 r = sd_bus_call_method(
1219 "org.freedesktop.DBus.Properties",
1227 return bus_message_map_all_properties(m, map, userdata);
1230 int bus_connect_transport(BusTransport transport, const char *host, bool user, sd_bus **bus) {
1233 assert(transport >= 0);
1234 assert(transport < _BUS_TRANSPORT_MAX);
1237 assert_return((transport == BUS_TRANSPORT_LOCAL) == !host, -EINVAL);
1238 assert_return(transport == BUS_TRANSPORT_LOCAL || !user, -EOPNOTSUPP);
1240 switch (transport) {
1242 case BUS_TRANSPORT_LOCAL:
1243 #if 0 /// elogind does not support a user bus
1245 r = sd_bus_default_user(bus);
1248 r = sd_bus_default_system(bus);
1252 case BUS_TRANSPORT_REMOTE:
1253 r = sd_bus_open_system_remote(bus, host);
1256 case BUS_TRANSPORT_MACHINE:
1257 r = sd_bus_open_system_machine(bus, host);
1261 assert_not_reached("Hmm, unknown transport type.");
1267 #if 0 /// UNNEEDED by elogind
1268 int bus_connect_transport_systemd(BusTransport transport, const char *host, bool user, sd_bus **bus) {
1271 assert(transport >= 0);
1272 assert(transport < _BUS_TRANSPORT_MAX);
1275 assert_return((transport == BUS_TRANSPORT_LOCAL) == !host, -EINVAL);
1276 assert_return(transport == BUS_TRANSPORT_LOCAL || !user, -EOPNOTSUPP);
1278 switch (transport) {
1280 case BUS_TRANSPORT_LOCAL:
1282 r = bus_connect_user_systemd(bus);
1284 r = bus_connect_system_systemd(bus);
1288 case BUS_TRANSPORT_REMOTE:
1289 r = sd_bus_open_system_remote(bus, host);
1292 case BUS_TRANSPORT_MACHINE:
1293 r = sd_bus_open_system_machine(bus, host);
1297 assert_not_reached("Hmm, unknown transport type.");
1304 int bus_property_get_bool(
1307 const char *interface,
1308 const char *property,
1309 sd_bus_message *reply,
1311 sd_bus_error *error) {
1313 int b = *(bool*) userdata;
1315 return sd_bus_message_append_basic(reply, 'b', &b);
1318 #if __SIZEOF_SIZE_T__ != 8
1319 int bus_property_get_size(
1322 const char *interface,
1323 const char *property,
1324 sd_bus_message *reply,
1326 sd_bus_error *error) {
1328 uint64_t sz = *(size_t*) userdata;
1330 return sd_bus_message_append_basic(reply, 't', &sz);
1334 #if __SIZEOF_LONG__ != 8
1335 int bus_property_get_long(
1338 const char *interface,
1339 const char *property,
1340 sd_bus_message *reply,
1342 sd_bus_error *error) {
1344 int64_t l = *(long*) userdata;
1346 return sd_bus_message_append_basic(reply, 'x', &l);
1349 int bus_property_get_ulong(
1352 const char *interface,
1353 const char *property,
1354 sd_bus_message *reply,
1356 sd_bus_error *error) {
1358 uint64_t ul = *(unsigned long*) userdata;
1360 return sd_bus_message_append_basic(reply, 't', &ul);
1364 int bus_log_parse_error(int r) {
1365 return log_error_errno(r, "Failed to parse bus message: %m");
1368 #if 0 /// UNNEEDED by elogind
1369 int bus_log_create_error(int r) {
1370 return log_error_errno(r, "Failed to create bus message: %m");
1373 int bus_parse_unit_info(sd_bus_message *message, UnitInfo *u) {
1379 return sd_bus_message_read(
1394 int bus_append_unit_property_assignment(sd_bus_message *m, const char *assignment) {
1395 const char *eq, *field;
1401 eq = strchr(assignment, '=');
1403 log_error("Not an assignment: %s", assignment);
1407 field = strndupa(assignment, eq - assignment);
1410 if (streq(field, "CPUQuota")) {
1414 r = sd_bus_message_append_basic(m, SD_BUS_TYPE_STRING, "CPUQuotaPerSecUSec");
1416 return bus_log_create_error(r);
1418 r = sd_bus_message_append(m, "v", "t", USEC_INFINITY);
1420 } else if (endswith(eq, "%")) {
1423 if (sscanf(eq, "%lf%%", &percent) != 1 || percent <= 0) {
1424 log_error("CPU quota '%s' invalid.", eq);
1428 r = sd_bus_message_append_basic(m, SD_BUS_TYPE_STRING, "CPUQuotaPerSecUSec");
1430 return bus_log_create_error(r);
1432 r = sd_bus_message_append(m, "v", "t", (usec_t) percent * USEC_PER_SEC / 100);
1434 log_error("CPU quota needs to be in percent.");
1439 return bus_log_create_error(r);
1443 } else if (streq(field, "EnvironmentFile")) {
1445 r = sd_bus_message_append_basic(m, SD_BUS_TYPE_STRING, "EnvironmentFiles");
1447 return bus_log_create_error(r);
1449 r = sd_bus_message_append(m, "v", "a(sb)", 1,
1450 eq[0] == '-' ? eq + 1 : eq,
1453 return bus_log_create_error(r);
1458 r = sd_bus_message_append_basic(m, SD_BUS_TYPE_STRING, field);
1460 return bus_log_create_error(r);
1462 if (STR_IN_SET(field,
1463 "CPUAccounting", "MemoryAccounting", "BlockIOAccounting", "TasksAccounting",
1464 "SendSIGHUP", "SendSIGKILL", "WakeSystem", "DefaultDependencies",
1465 "IgnoreSIGPIPE", "TTYVHangup", "TTYReset", "RemainAfterExit",
1466 "PrivateTmp", "PrivateDevices", "PrivateNetwork", "NoNewPrivileges",
1467 "SyslogLevelPrefix", "Delegate")) {
1469 r = parse_boolean(eq);
1471 log_error("Failed to parse boolean assignment %s.", assignment);
1475 r = sd_bus_message_append(m, "v", "b", r);
1477 } else if (streq(field, "MemoryLimit")) {
1480 if (isempty(eq) || streq(eq, "infinity"))
1481 bytes = (uint64_t) -1;
1483 r = parse_size(eq, 1024, &bytes);
1485 log_error("Failed to parse bytes specification %s", assignment);
1490 r = sd_bus_message_append(m, "v", "t", bytes);
1492 } else if (streq(field, "TasksMax")) {
1495 if (isempty(eq) || streq(eq, "infinity"))
1498 r = safe_atou64(eq, &n);
1500 log_error("Failed to parse maximum tasks specification %s", assignment);
1505 r = sd_bus_message_append(m, "v", "t", n);
1507 } else if (STR_IN_SET(field, "CPUShares", "StartupCPUShares")) {
1510 r = cg_cpu_shares_parse(eq, &u);
1512 log_error("Failed to parse %s value %s.", field, eq);
1516 r = sd_bus_message_append(m, "v", "t", u);
1518 } else if (STR_IN_SET(field, "BlockIOWeight", "StartupBlockIOWeight")) {
1521 r = cg_cpu_shares_parse(eq, &u);
1523 log_error("Failed to parse %s value %s.", field, eq);
1527 r = sd_bus_message_append(m, "v", "t", u);
1529 } else if (STR_IN_SET(field,
1530 "User", "Group", "DevicePolicy", "KillMode",
1531 "UtmpIdentifier", "UtmpMode", "PAMName", "TTYPath",
1532 "StandardInput", "StandardOutput", "StandardError",
1533 "Description", "Slice", "Type", "WorkingDirectory",
1534 "RootDirectory", "SyslogIdentifier", "ProtectSystem",
1536 r = sd_bus_message_append(m, "v", "s", eq);
1538 else if (streq(field, "SyslogLevel")) {
1541 level = log_level_from_string(eq);
1543 log_error("Failed to parse %s value %s.", field, eq);
1547 r = sd_bus_message_append(m, "v", "i", level);
1549 } else if (streq(field, "SyslogFacility")) {
1552 facility = log_facility_unshifted_from_string(eq);
1554 log_error("Failed to parse %s value %s.", field, eq);
1558 r = sd_bus_message_append(m, "v", "i", facility);
1560 } else if (streq(field, "DeviceAllow")) {
1563 r = sd_bus_message_append(m, "v", "a(ss)", 0);
1565 const char *path, *rwm, *e;
1567 e = strchr(eq, ' ');
1569 path = strndupa(eq, e - eq);
1576 if (!path_startswith(path, "/dev")) {
1577 log_error("%s is not a device file in /dev.", path);
1581 r = sd_bus_message_append(m, "v", "a(ss)", 1, path, rwm);
1584 } else if (STR_IN_SET(field, "BlockIOReadBandwidth", "BlockIOWriteBandwidth")) {
1587 r = sd_bus_message_append(m, "v", "a(st)", 0);
1589 const char *path, *bandwidth, *e;
1592 e = strchr(eq, ' ');
1594 path = strndupa(eq, e - eq);
1597 log_error("Failed to parse %s value %s.", field, eq);
1601 if (!path_startswith(path, "/dev")) {
1602 log_error("%s is not a device file in /dev.", path);
1606 r = parse_size(bandwidth, 1000, &bytes);
1608 log_error("Failed to parse byte value %s.", bandwidth);
1612 r = sd_bus_message_append(m, "v", "a(st)", 1, path, bytes);
1615 } else if (streq(field, "BlockIODeviceWeight")) {
1618 r = sd_bus_message_append(m, "v", "a(st)", 0);
1620 const char *path, *weight, *e;
1623 e = strchr(eq, ' ');
1625 path = strndupa(eq, e - eq);
1628 log_error("Failed to parse %s value %s.", field, eq);
1632 if (!path_startswith(path, "/dev")) {
1633 log_error("%s is not a device file in /dev.", path);
1637 r = safe_atou64(weight, &u);
1639 log_error("Failed to parse %s value %s.", field, weight);
1642 r = sd_bus_message_append(m, "v", "a(st)", path, u);
1645 } else if (rlimit_from_string(field) >= 0) {
1648 if (streq(eq, "infinity"))
1651 r = safe_atou64(eq, &rl);
1653 log_error("Invalid resource limit: %s", eq);
1658 r = sd_bus_message_append(m, "v", "t", rl);
1660 } else if (streq(field, "Nice")) {
1663 r = safe_atoi32(eq, &i);
1665 log_error("Failed to parse %s value %s.", field, eq);
1669 r = sd_bus_message_append(m, "v", "i", i);
1671 } else if (STR_IN_SET(field, "Environment", "PassEnvironment")) {
1674 r = sd_bus_message_open_container(m, 'v', "as");
1676 return bus_log_create_error(r);
1678 r = sd_bus_message_open_container(m, 'a', "s");
1680 return bus_log_create_error(r);
1685 _cleanup_free_ char *word = NULL;
1687 r = extract_first_word(&p, &word, NULL, EXTRACT_QUOTES|EXTRACT_CUNESCAPE);
1689 log_error("Failed to parse Environment value %s", eq);
1695 if (streq(field, "Environment")) {
1696 if (!env_assignment_is_valid(word)) {
1697 log_error("Invalid environment assignment: %s", word);
1700 } else { /* PassEnvironment */
1701 if (!env_name_is_valid(word)) {
1702 log_error("Invalid environment variable name: %s", word);
1707 r = sd_bus_message_append_basic(m, 's', word);
1709 return bus_log_create_error(r);
1712 r = sd_bus_message_close_container(m);
1714 return bus_log_create_error(r);
1716 r = sd_bus_message_close_container(m);
1718 } else if (streq(field, "KillSignal")) {
1721 sig = signal_from_string_try_harder(eq);
1723 log_error("Failed to parse %s value %s.", field, eq);
1727 r = sd_bus_message_append(m, "v", "i", sig);
1729 } else if (streq(field, "AccuracySec")) {
1732 r = parse_sec(eq, &u);
1734 log_error("Failed to parse %s value %s", field, eq);
1738 r = sd_bus_message_append(m, "v", "t", u);
1739 } else if (streq(field, "TimerSlackNSec")) {
1742 r = parse_nsec(eq, &n);
1744 log_error("Failed to parse %s value %s", field, eq);
1748 r = sd_bus_message_append(m, "v", "t", n);
1749 } else if (streq(field, "OOMScoreAdjust")) {
1752 r = safe_atoi(eq, &oa);
1754 log_error("Failed to parse %s value %s", field, eq);
1758 if (!oom_score_adjust_is_valid(oa)) {
1759 log_error("OOM score adjust value out of range");
1763 r = sd_bus_message_append(m, "v", "i", oa);
1764 } else if (STR_IN_SET(field, "ReadWriteDirectories", "ReadOnlyDirectories", "InaccessibleDirectories")) {
1767 r = sd_bus_message_open_container(m, 'v', "as");
1769 return bus_log_create_error(r);
1771 r = sd_bus_message_open_container(m, 'a', "s");
1773 return bus_log_create_error(r);
1778 _cleanup_free_ char *word = NULL;
1781 r = extract_first_word(&p, &word, NULL, EXTRACT_QUOTES);
1783 log_error("Failed to parse %s value %s", field, eq);
1789 if (!utf8_is_valid(word)) {
1790 log_error("Failed to parse %s value %s", field, eq);
1794 offset = word[0] == '-';
1795 if (!path_is_absolute(word + offset)) {
1796 log_error("Failed to parse %s value %s", field, eq);
1800 path_kill_slashes(word + offset);
1802 r = sd_bus_message_append_basic(m, 's', word);
1804 return bus_log_create_error(r);
1807 r = sd_bus_message_close_container(m);
1809 return bus_log_create_error(r);
1811 r = sd_bus_message_close_container(m);
1813 } else if (streq(field, "RuntimeDirectory")) {
1816 r = sd_bus_message_open_container(m, 'v', "as");
1818 return bus_log_create_error(r);
1820 r = sd_bus_message_open_container(m, 'a', "s");
1822 return bus_log_create_error(r);
1827 _cleanup_free_ char *word = NULL;
1829 r = extract_first_word(&p, &word, NULL, EXTRACT_QUOTES);
1831 return log_error_errno(r, "Failed to parse %s value %s", field, eq);
1836 r = sd_bus_message_append_basic(m, 's', word);
1838 return bus_log_create_error(r);
1841 r = sd_bus_message_close_container(m);
1843 return bus_log_create_error(r);
1845 r = sd_bus_message_close_container(m);
1848 log_error("Unknown assignment %s.", assignment);
1853 return bus_log_create_error(r);
1859 typedef struct BusWaitForJobs {
1866 sd_bus_slot *slot_job_removed;
1867 sd_bus_slot *slot_disconnected;
1870 #if 0 /// UNNEEDED by elogind
1871 static int match_disconnected(sd_bus_message *m, void *userdata, sd_bus_error *error) {
1874 log_error("Warning! D-Bus connection terminated.");
1875 sd_bus_close(sd_bus_message_get_bus(m));
1880 static int match_job_removed(sd_bus_message *m, void *userdata, sd_bus_error *error) {
1881 const char *path, *unit, *result;
1882 BusWaitForJobs *d = userdata;
1890 r = sd_bus_message_read(m, "uoss", &id, &path, &unit, &result);
1892 bus_log_parse_error(r);
1896 found = set_remove(d->jobs, (char*) path);
1902 if (!isempty(result))
1903 d->result = strdup(result);
1906 d->name = strdup(unit);
1911 void bus_wait_for_jobs_free(BusWaitForJobs *d) {
1915 set_free_free(d->jobs);
1917 sd_bus_slot_unref(d->slot_disconnected);
1918 sd_bus_slot_unref(d->slot_job_removed);
1920 sd_bus_unref(d->bus);
1928 int bus_wait_for_jobs_new(sd_bus *bus, BusWaitForJobs **ret) {
1929 _cleanup_(bus_wait_for_jobs_freep) BusWaitForJobs *d = NULL;
1935 d = new0(BusWaitForJobs, 1);
1939 d->bus = sd_bus_ref(bus);
1941 /* When we are a bus client we match by sender. Direct
1942 * connections OTOH have no initialized sender field, and
1943 * hence we ignore the sender then */
1944 r = sd_bus_add_match(
1946 &d->slot_job_removed,
1949 "sender='org.freedesktop.systemd1',"
1950 "interface='org.freedesktop.systemd1.Manager',"
1951 "member='JobRemoved',"
1952 "path='/org/freedesktop/systemd1'" :
1954 "interface='org.freedesktop.systemd1.Manager',"
1955 "member='JobRemoved',"
1956 "path='/org/freedesktop/systemd1'",
1957 match_job_removed, d);
1961 r = sd_bus_add_match(
1963 &d->slot_disconnected,
1965 "sender='org.freedesktop.DBus.Local',"
1966 "interface='org.freedesktop.DBus.Local',"
1967 "member='Disconnected'",
1968 match_disconnected, d);
1978 static int bus_process_wait(sd_bus *bus) {
1982 r = sd_bus_process(bus, NULL);
1988 r = sd_bus_wait(bus, (uint64_t) -1);
1994 static int bus_job_get_service_result(BusWaitForJobs *d, char **result) {
1995 _cleanup_free_ char *dbus_path = NULL;
2001 dbus_path = unit_dbus_path_from_name(d->name);
2005 return sd_bus_get_property_string(d->bus,
2006 "org.freedesktop.systemd1",
2008 "org.freedesktop.systemd1.Service",
2014 static const struct {
2015 const char *result, *explanation;
2016 } explanations [] = {
2017 { "resources", "a configured resource limit was exceeded" },
2018 { "timeout", "a timeout was exceeded" },
2019 { "exit-code", "the control process exited with error code" },
2020 { "signal", "a fatal signal was delivered to the control process" },
2021 { "core-dump", "a fatal signal was delivered causing the control process to dump core" },
2022 { "watchdog", "the service failed to send watchdog ping" },
2023 { "start-limit", "start of the service was attempted too often" }
2026 static void log_job_error_with_service_result(const char* service, const char *result) {
2027 _cleanup_free_ char *service_shell_quoted = NULL;
2031 service_shell_quoted = shell_maybe_quote(service);
2033 if (!isempty(result)) {
2036 for (i = 0; i < ELEMENTSOF(explanations); ++i)
2037 if (streq(result, explanations[i].result))
2040 if (i < ELEMENTSOF(explanations)) {
2041 log_error("Job for %s failed because %s. See \"systemctl status %s\" and \"journalctl -xe\" for details.\n",
2043 explanations[i].explanation,
2044 strna(service_shell_quoted));
2050 log_error("Job for %s failed. See \"systemctl status %s\" and \"journalctl -xe\" for details.\n",
2052 strna(service_shell_quoted));
2055 /* For some results maybe additional explanation is required */
2056 if (streq_ptr(result, "start-limit"))
2057 log_info("To force a start use \"systemctl reset-failed %1$s\" followed by \"systemctl start %1$s\" again.",
2058 strna(service_shell_quoted));
2061 static int check_wait_response(BusWaitForJobs *d, bool quiet) {
2067 if (streq(d->result, "canceled"))
2068 log_error("Job for %s canceled.", strna(d->name));
2069 else if (streq(d->result, "timeout"))
2070 log_error("Job for %s timed out.", strna(d->name));
2071 else if (streq(d->result, "dependency"))
2072 log_error("A dependency job for %s failed. See 'journalctl -xe' for details.", strna(d->name));
2073 else if (streq(d->result, "invalid"))
2074 log_error("Job for %s invalid.", strna(d->name));
2075 else if (streq(d->result, "assert"))
2076 log_error("Assertion failed on job for %s.", strna(d->name));
2077 else if (streq(d->result, "unsupported"))
2078 log_error("Operation on or unit type of %s not supported on this system.", strna(d->name));
2079 else if (!streq(d->result, "done") && !streq(d->result, "skipped")) {
2082 _cleanup_free_ char *result = NULL;
2084 q = bus_job_get_service_result(d, &result);
2086 log_debug_errno(q, "Failed to get Result property of service %s: %m", d->name);
2088 log_job_error_with_service_result(d->name, result);
2090 log_error("Job failed. See \"journalctl -xe\" for details.");
2094 if (streq(d->result, "canceled"))
2096 else if (streq(d->result, "timeout"))
2098 else if (streq(d->result, "dependency"))
2100 else if (streq(d->result, "invalid"))
2102 else if (streq(d->result, "assert"))
2104 else if (streq(d->result, "unsupported"))
2106 else if (!streq(d->result, "done") && !streq(d->result, "skipped"))
2112 int bus_wait_for_jobs(BusWaitForJobs *d, bool quiet) {
2117 while (!set_isempty(d->jobs)) {
2120 q = bus_process_wait(d->bus);
2122 return log_error_errno(q, "Failed to wait for response: %m");
2125 q = check_wait_response(d, quiet);
2126 /* Return the first error as it is most likely to be
2128 if (q < 0 && r == 0)
2131 log_debug_errno(q, "Got result %s/%m for job %s", strna(d->result), strna(d->name));
2134 d->name = mfree(d->name);
2135 d->result = mfree(d->result);
2141 int bus_wait_for_jobs_add(BusWaitForJobs *d, const char *path) {
2146 r = set_ensure_allocated(&d->jobs, &string_hash_ops);
2150 return set_put_strdup(d->jobs, path);
2153 int bus_wait_for_jobs_one(BusWaitForJobs *d, const char *path, bool quiet) {
2156 r = bus_wait_for_jobs_add(d, path);
2160 return bus_wait_for_jobs(d, quiet);
2163 int bus_deserialize_and_dump_unit_file_changes(sd_bus_message *m, bool quiet, UnitFileChange **changes, unsigned *n_changes) {
2164 const char *type, *path, *source;
2167 r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, "(sss)");
2169 return bus_log_parse_error(r);
2171 while ((r = sd_bus_message_read(m, "(sss)", &type, &path, &source)) > 0) {
2173 if (streq(type, "symlink"))
2174 log_info("Created symlink from %s to %s.", path, source);
2176 log_info("Removed symlink %s.", path);
2179 r = unit_file_changes_add(changes, n_changes, streq(type, "symlink") ? UNIT_FILE_SYMLINK : UNIT_FILE_UNLINK, path, source);
2184 return bus_log_parse_error(r);
2186 r = sd_bus_message_exit_container(m);
2188 return bus_log_parse_error(r);
2194 * bus_path_encode_unique() - encode unique object path
2195 * @b: bus connection or NULL
2196 * @prefix: object path prefix
2197 * @sender_id: unique-name of client, or NULL
2198 * @external_id: external ID to be chosen by client, or NULL
2199 * @ret_path: storage for encoded object path pointer
2201 * Whenever we provide a bus API that allows clients to create and manage
2202 * server-side objects, we need to provide a unique name for these objects. If
2203 * we let the server choose the name, we suffer from a race condition: If a
2204 * client creates an object asynchronously, it cannot destroy that object until
2205 * it received the method reply. It cannot know the name of the new object,
2206 * thus, it cannot destroy it. Furthermore, it enforces a round-trip.
2208 * Therefore, many APIs allow the client to choose the unique name for newly
2209 * created objects. There're two problems to solve, though:
2210 * 1) Object names are usually defined via dbus object paths, which are
2211 * usually globally namespaced. Therefore, multiple clients must be able
2212 * to choose unique object names without interference.
2213 * 2) If multiple libraries share the same bus connection, they must be
2214 * able to choose unique object names without interference.
2215 * The first problem is solved easily by prefixing a name with the
2216 * unique-bus-name of a connection. The server side must enforce this and
2217 * reject any other name. The second problem is solved by providing unique
2218 * suffixes from within sd-bus.
2220 * This helper allows clients to create unique object-paths. It uses the
2221 * template '/prefix/sender_id/external_id' and returns the new path in
2222 * @ret_path (must be freed by the caller).
2223 * If @sender_id is NULL, the unique-name of @b is used. If @external_id is
2224 * NULL, this function allocates a unique suffix via @b (by requesting a new
2225 * cookie). If both @sender_id and @external_id are given, @b can be passed as
2228 * Returns: 0 on success, negative error code on failure.
2230 int bus_path_encode_unique(sd_bus *b, const char *prefix, const char *sender_id, const char *external_id, char **ret_path) {
2231 _cleanup_free_ char *sender_label = NULL, *external_label = NULL;
2232 char external_buf[DECIMAL_STR_MAX(uint64_t)], *p;
2235 assert_return(b || (sender_id && external_id), -EINVAL);
2236 assert_return(object_path_is_valid(prefix), -EINVAL);
2237 assert_return(ret_path, -EINVAL);
2240 r = sd_bus_get_unique_name(b, &sender_id);
2246 xsprintf(external_buf, "%"PRIu64, ++b->cookie);
2247 external_id = external_buf;
2250 sender_label = bus_label_escape(sender_id);
2254 external_label = bus_label_escape(external_id);
2255 if (!external_label)
2258 p = strjoin(prefix, "/", sender_label, "/", external_label, NULL);
2267 * bus_path_decode_unique() - decode unique object path
2268 * @path: object path to decode
2269 * @prefix: object path prefix
2270 * @ret_sender: output parameter for sender-id label
2271 * @ret_external: output parameter for external-id label
2273 * This does the reverse of bus_path_encode_unique() (see its description for
2274 * details). Both trailing labels, sender-id and external-id, are unescaped and
2275 * returned in the given output parameters (the caller must free them).
2277 * Note that this function returns 0 if the path does not match the template
2278 * (see bus_path_encode_unique()), 1 if it matched.
2280 * Returns: Negative error code on failure, 0 if the given object path does not
2281 * match the template (return parameters are set to NULL), 1 if it was
2282 * parsed successfully (return parameters contain allocated labels).
2284 int bus_path_decode_unique(const char *path, const char *prefix, char **ret_sender, char **ret_external) {
2286 char *sender, *external;
2288 assert(object_path_is_valid(path));
2289 assert(object_path_is_valid(prefix));
2291 assert(ret_external);
2293 p = object_path_startswith(path, prefix);
2296 *ret_external = NULL;
2303 *ret_external = NULL;
2307 sender = bus_label_unescape_n(p, q - p);
2308 external = bus_label_unescape(q + 1);
2309 if (!sender || !external) {
2315 *ret_sender = sender;
2316 *ret_external = external;
2321 bool is_kdbus_wanted(void) {
2322 _cleanup_free_ char *value = NULL;
2324 const bool configured = true;
2326 const bool configured = false;
2331 if (get_proc_cmdline_key("kdbus", NULL) > 0)
2334 r = get_proc_cmdline_key("kdbus=", &value);
2338 return parse_boolean(value) == 1;
2341 bool is_kdbus_available(void) {
2342 _cleanup_close_ int fd = -1;
2343 struct kdbus_cmd cmd = { .size = sizeof(cmd), .flags = KDBUS_FLAG_NEGOTIATE };
2345 if (!is_kdbus_wanted())
2348 fd = open("/sys/fs/kdbus/control", O_RDWR | O_CLOEXEC | O_NONBLOCK | O_NOCTTY);
2352 return ioctl(fd, KDBUS_CMD_BUS_MAKE, &cmd) >= 0;
2355 #if 0 /// UNNEEDED by elogind
2356 int bus_property_get_rlimit(
2359 const char *interface,
2360 const char *property,
2361 sd_bus_message *reply,
2363 sd_bus_error *error) {
2373 rl = *(struct rlimit**) userdata;
2377 struct rlimit buf = {};
2380 z = rlimit_from_string(strstr(property, "Limit"));
2387 /* rlim_t might have different sizes, let's map
2388 * RLIMIT_INFINITY to (uint64_t) -1, so that it is the same on
2390 u = x == RLIM_INFINITY ? (uint64_t) -1 : (uint64_t) x;
2392 return sd_bus_message_append(reply, "t", u);