1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
7 Copyright 2013 Daniel Mack
8 Copyright 2014 Kay Sievers
10 systemd is free software; you can redistribute it and/or modify it
11 under the terms of the GNU Lesser General Public License as published by
12 the Free Software Foundation; either version 2.1 of the License, or
13 (at your option) any later version.
15 systemd is distributed in the hope that it will be useful, but
16 WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 Lesser General Public License for more details.
20 You should have received a copy of the GNU Lesser General Public License
21 along with systemd; If not, see <http://www.gnu.org/licenses/>.
24 #include <sys/socket.h>
26 #include <sys/types.h>
37 #include "socket-util.h"
38 #include "sd-daemon.h"
40 #include "bus-internal.h"
41 #include "bus-message.h"
46 #include "capability.h"
47 #include "bus-policy.h"
49 static char *arg_address = NULL;
50 static char *arg_command_line_buffer = NULL;
51 static bool arg_drop_privileges = false;
52 static char **arg_configuration = NULL;
54 static int help(void) {
56 printf("%s [OPTIONS...]\n\n"
57 "Connect STDIO or a socket to a given bus address.\n\n"
58 " -h --help Show this help\n"
59 " --version Show package version\n"
60 " --drop-privileges Drop privileges\n"
61 " --configuration=PATH Configuration file or directory\n"
62 " --machine=MACHINE Connect to specified machine\n"
63 " --address=ADDRESS Connect to the bus specified by ADDRESS\n"
64 " (default: " DEFAULT_SYSTEM_BUS_PATH ")\n",
65 program_invocation_short_name);
70 static int parse_argv(int argc, char *argv[]) {
80 static const struct option options[] = {
81 { "help", no_argument, NULL, 'h' },
82 { "version", no_argument, NULL, ARG_VERSION },
83 { "address", required_argument, NULL, ARG_ADDRESS },
84 { "drop-privileges", no_argument, NULL, ARG_DROP_PRIVILEGES },
85 { "configuration", required_argument, NULL, ARG_CONFIGURATION },
86 { "machine", required_argument, NULL, ARG_MACHINE },
95 while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
104 puts(PACKAGE_STRING);
105 puts(SYSTEMD_FEATURES);
120 case ARG_DROP_PRIVILEGES:
121 arg_drop_privileges = true;
124 case ARG_CONFIGURATION:
125 r = strv_extend(&arg_configuration, optarg);
131 _cleanup_free_ char *e = NULL;
134 e = bus_address_escape(optarg);
139 a = strjoin("x-container-kernel:machine=", e, ";x-container-unix:machine=", e, NULL);
141 a = strjoin("x-container-unix:machine=", e, NULL);
156 assert_not_reached("Unhandled option");
159 /* If the first command line argument is only "x" characters
160 * we'll write who we are talking to into it, so that "ps" is
162 arg_command_line_buffer = argv[optind];
163 if (argc > optind + 1 || (arg_command_line_buffer && !in_charset(arg_command_line_buffer, "x"))) {
164 log_error("Too many arguments");
169 arg_address = strdup(DEFAULT_SYSTEM_BUS_PATH);
177 static int rename_service(sd_bus *a, sd_bus *b) {
178 _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
179 _cleanup_free_ char *p = NULL, *name = NULL;
189 r = sd_bus_get_peer_creds(b, SD_BUS_CREDS_UID|SD_BUS_CREDS_PID|SD_BUS_CREDS_CMDLINE|SD_BUS_CREDS_COMM, &creds);
193 r = sd_bus_creds_get_uid(creds, &uid);
197 r = sd_bus_creds_get_pid(creds, &pid);
201 r = sd_bus_creds_get_cmdline(creds, &cmdline);
205 r = sd_bus_creds_get_comm(creds, &comm);
209 name = uid_to_name(uid);
213 p = strv_join(cmdline, " ");
217 /* The status string gets the full command line ... */
219 "STATUS=Processing requests from client PID "PID_FMT" (%s); UID "UID_FMT" (%s)",
223 /* ... and the argv line only the short comm */
224 if (arg_command_line_buffer) {
227 m = strlen(arg_command_line_buffer);
228 w = snprintf(arg_command_line_buffer, m,
229 "[PID "PID_FMT"/%s; UID "UID_FMT"/%s]",
234 memzero(arg_command_line_buffer + w, m - w);
237 log_debug("Running on behalf of PID "PID_FMT" (%s), UID "UID_FMT" (%s), %s",
245 static int synthesize_name_acquired(sd_bus *a, sd_bus *b, sd_bus_message *m) {
246 _cleanup_bus_message_unref_ sd_bus_message *n = NULL;
247 const char *name, *old_owner, *new_owner;
254 /* If we get NameOwnerChanged for our own name, we need to
255 * synthesize NameLost/NameAcquired, since socket clients need
256 * that, even though it is obsoleted on kdbus */
261 if (!sd_bus_message_is_signal(m, "org.freedesktop.DBus", "NameOwnerChanged") ||
262 !streq_ptr(m->path, "/org/freedesktop/DBus") ||
263 !streq_ptr(m->sender, "org.freedesktop.DBus"))
266 r = sd_bus_message_read(m, "sss", &name, &old_owner, &new_owner);
270 r = sd_bus_message_rewind(m, true);
274 if (streq(old_owner, a->unique_name)) {
276 r = sd_bus_message_new_signal(
279 "/org/freedesktop/DBus",
280 "org.freedesktop.DBus",
283 } else if (streq(new_owner, a->unique_name)) {
285 r = sd_bus_message_new_signal(
288 "/org/freedesktop/DBus",
289 "org.freedesktop.DBus",
297 r = sd_bus_message_append(n, "s", name);
301 r = bus_message_append_sender(n, "org.freedesktop.DBus");
305 r = bus_seal_synthetic_message(b, n);
309 return sd_bus_send(b, n, NULL);
312 static int process_policy(sd_bus *a, sd_bus *b, sd_bus_message *m) {
313 _cleanup_bus_message_unref_ sd_bus_message *n = NULL;
323 if (!sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Properties", "GetAll"))
326 if (!streq_ptr(m->path, "/org/gnome/DisplayManager/Slave"))
329 r = sd_bus_message_new_method_errorf(m, &n, SD_BUS_ERROR_ACCESS_DENIED, "gdm, you are stupid");
333 r = bus_message_append_sender(n, "org.freedesktop.DBus");
335 log_error("Failed to append sender to gdm reply: %s", strerror(-r));
339 r = bus_seal_synthetic_message(b, n);
341 log_error("Failed to seal gdm reply: %s", strerror(-r));
345 r = sd_bus_send(b, n, NULL);
347 log_error("Failed to send gdm reply: %s", strerror(-r));
354 static int synthetic_driver_send(sd_bus *b, sd_bus_message *m) {
360 r = bus_message_append_sender(m, "org.freedesktop.DBus");
364 r = bus_seal_synthetic_message(b, m);
368 return sd_bus_send(b, m, NULL);
371 static int synthetic_reply_method_error(sd_bus_message *call, const sd_bus_error *e) {
372 _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
377 if (call->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED)
380 r = sd_bus_message_new_method_error(call, &m, e);
384 return synthetic_driver_send(call->bus, m);
387 static int synthetic_reply_method_errno(sd_bus_message *call, int error, const sd_bus_error *p) {
389 _cleanup_bus_error_free_ sd_bus_error berror = SD_BUS_ERROR_NULL;
393 if (call->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED)
396 if (sd_bus_error_is_set(p))
397 return synthetic_reply_method_error(call, p);
399 sd_bus_error_set_errno(&berror, error);
401 return synthetic_reply_method_error(call, &berror);
404 static int synthetic_reply_method_return(sd_bus_message *call, const char *types, ...) {
405 _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
410 if (call->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED)
413 r = sd_bus_message_new_method_return(call, &m);
417 if (!isempty(types)) {
421 r = bus_message_append_ap(m, types, ap);
427 return synthetic_driver_send(call->bus, m);
430 static int synthetic_reply_return_strv(sd_bus_message *call, char **l) {
431 _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
436 r = sd_bus_message_new_method_return(call, &m);
438 return synthetic_reply_method_errno(call, r, NULL);
440 r = sd_bus_message_append_strv(m, l);
442 return synthetic_reply_method_errno(call, r, NULL);
444 return synthetic_driver_send(call->bus, m);
447 static int get_creds_by_name(sd_bus *bus, const char *name, uint64_t mask, sd_bus_creds **_creds, sd_bus_error *error) {
448 _cleanup_bus_creds_unref_ sd_bus_creds *c = NULL;
455 assert_return(service_name_is_valid(name), -EINVAL);
457 r = sd_bus_get_owner(bus, name, mask, &c);
458 if (r == -ESRCH || r == -ENXIO)
459 return sd_bus_error_setf(error, SD_BUS_ERROR_NAME_HAS_NO_OWNER, "Name %s is currently not owned by anyone.", name);
463 if ((c->mask & mask) != mask)
472 static int get_creds_by_message(sd_bus *bus, sd_bus_message *m, uint64_t mask, sd_bus_creds **_creds, sd_bus_error *error) {
480 r = sd_bus_message_read(m, "s", &name);
484 return get_creds_by_name(bus, name, mask, _creds, error);
487 static int peer_is_privileged(sd_bus *bus, sd_bus_message *m) {
488 _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
492 r = get_creds_by_message(bus, m, SD_BUS_CREDS_UID, &creds, NULL);
496 r = sd_bus_creds_get_uid(creds, &uid);
500 r = sd_bus_creds_has_effective_cap(creds, CAP_SYS_ADMIN);
510 static int process_driver(sd_bus *a, sd_bus *b, sd_bus_message *m) {
520 if (!streq_ptr(sd_bus_message_get_destination(m), "org.freedesktop.DBus"))
523 if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Introspectable", "Introspect")) {
524 if (0 && !isempty(sd_bus_message_get_signature(m, true))) {
525 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
527 r = sd_bus_error_setf(&error, SD_BUS_ERROR_INVALID_ARGS, "Expected no parameters");
529 return synthetic_reply_method_errno(m, r, &error);
532 return synthetic_reply_method_return(m, "s",
533 "<!DOCTYPE node PUBLIC \"-//freedesktop//DTD D-BUS Object Introspection 1.0//EN\" "
534 "\"http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd\">\n"
536 " <interface name=\"org.freedesktop.DBus.Introspectable\">\n"
537 " <method name=\"Introspect\">\n"
538 " <arg name=\"data\" type=\"s\" direction=\"out\"/>\n"
541 " <interface name=\"org.freedesktop.DBus\">\n"
542 " <method name=\"AddMatch\">\n"
543 " <arg type=\"s\" direction=\"in\"/>\n"
545 " <method name=\"RemoveMatch\">\n"
546 " <arg type=\"s\" direction=\"in\"/>\n"
548 " <method name=\"GetConnectionSELinuxSecurityContext\">\n"
549 " <arg type=\"s\" direction=\"in\"/>\n"
550 " <arg type=\"ay\" direction=\"out\"/>\n"
552 " <method name=\"GetConnectionUnixProcessID\">\n"
553 " <arg type=\"s\" direction=\"in\"/>\n"
554 " <arg type=\"u\" direction=\"out\"/>\n"
556 " <method name=\"GetConnectionUnixUser\">\n"
557 " <arg type=\"s\" direction=\"in\"/>\n"
558 " <arg type=\"u\" direction=\"out\"/>\n"
560 " <method name=\"GetId\">\n"
561 " <arg type=\"s\" direction=\"out\"/>\n"
563 " <method name=\"GetNameOwner\">\n"
564 " <arg type=\"s\" direction=\"in\"/>\n"
565 " <arg type=\"s\" direction=\"out\"/>\n"
567 " <method name=\"Hello\">\n"
568 " <arg type=\"s\" direction=\"out\"/>\n"
570 " <method name=\"ListActivatableNames\">\n"
571 " <arg type=\"as\" direction=\"out\"/>\n"
573 " <method name=\"ListNames\">\n"
574 " <arg type=\"as\" direction=\"out\"/>\n"
576 " <method name=\"ListQueuedOwners\">\n"
577 " <arg type=\"s\" direction=\"in\"/>\n"
578 " <arg type=\"as\" direction=\"out\"/>\n"
580 " <method name=\"NameHasOwner\">\n"
581 " <arg type=\"s\" direction=\"in\"/>\n"
582 " <arg type=\"b\" direction=\"out\"/>\n"
584 " <method name=\"ReleaseName\">\n"
585 " <arg type=\"s\" direction=\"in\"/>\n"
586 " <arg type=\"u\" direction=\"out\"/>\n"
588 " <method name=\"ReloadConfig\">\n"
590 " <method name=\"RequestName\">\n"
591 " <arg type=\"s\" direction=\"in\"/>\n"
592 " <arg type=\"u\" direction=\"in\"/>\n"
593 " <arg type=\"u\" direction=\"out\"/>\n"
595 " <method name=\"StartServiceByName\">\n"
596 " <arg type=\"s\" direction=\"in\"/>\n"
597 " <arg type=\"u\" direction=\"in\"/>\n"
598 " <arg type=\"u\" direction=\"out\"/>\n"
600 " <method name=\"UpdateActivationEnvironment\">\n"
601 " <arg type=\"a{ss}\" direction=\"in\"/>\n"
603 " <signal name=\"NameAcquired\">\n"
604 " <arg type=\"s\"/>\n"
606 " <signal name=\"NameLost\">\n"
607 " <arg type=\"s\"/>\n"
609 " <signal name=\"NameOwnerChanged\">\n"
610 " <arg type=\"s\"/>\n"
611 " <arg type=\"s\"/>\n"
612 " <arg type=\"s\"/>\n"
617 } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "AddMatch")) {
620 r = sd_bus_message_read(m, "s", &match);
622 return synthetic_reply_method_errno(m, r, NULL);
624 r = sd_bus_add_match(a, NULL, match, NULL, NULL);
626 return synthetic_reply_method_errno(m, r, NULL);
628 return synthetic_reply_method_return(m, NULL);
630 } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "RemoveMatch")) {
633 r = sd_bus_message_read(m, "s", &match);
635 return synthetic_reply_method_errno(m, r, NULL);
637 r = bus_remove_match_by_string(a, match, NULL, NULL);
639 return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_MATCH_RULE_NOT_FOUND, "Match rule not found"));
641 return synthetic_reply_method_errno(m, r, NULL);
643 return synthetic_reply_method_return(m, NULL);
645 } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "GetConnectionSELinuxSecurityContext")) {
646 _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
648 r = get_creds_by_message(a, m, SD_BUS_CREDS_SELINUX_CONTEXT, &creds, NULL);
650 return synthetic_reply_method_errno(m, r, NULL);
652 return synthetic_reply_method_return(m, "y", creds->label, strlen(creds->label));
654 } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "GetConnectionUnixProcessID")) {
655 _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
657 r = get_creds_by_message(a, m, SD_BUS_CREDS_PID, &creds, NULL);
659 return synthetic_reply_method_errno(m, r, NULL);
661 return synthetic_reply_method_return(m, "u", (uint32_t) creds->pid);
663 } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "GetConnectionUnixUser")) {
664 _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
666 r = get_creds_by_message(a, m, SD_BUS_CREDS_UID, &creds, NULL);
668 return synthetic_reply_method_errno(m, r, NULL);
670 return synthetic_reply_method_return(m, "u", (uint32_t) creds->uid);
672 } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "GetId")) {
673 sd_id128_t server_id;
674 char buf[SD_ID128_STRING_MAX];
676 r = sd_bus_get_server_id(a, &server_id);
678 return synthetic_reply_method_errno(m, r, NULL);
680 return synthetic_reply_method_return(m, "s", sd_id128_to_string(server_id, buf));
682 } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "GetNameOwner")) {
684 _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
685 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
687 r = sd_bus_message_read(m, "s", &name);
689 return synthetic_reply_method_errno(m, r, NULL);
691 if (streq(name, "org.freedesktop.DBus"))
692 return synthetic_reply_method_return(m, "s", "org.freedesktop.DBus");
694 r = get_creds_by_name(a, name, SD_BUS_CREDS_UNIQUE_NAME, &creds, &error);
696 return synthetic_reply_method_errno(m, r, &error);
698 return synthetic_reply_method_return(m, "s", creds->unique_name);
700 /* "Hello" is handled in process_hello() */
702 } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "ListActivatableNames")) {
703 _cleanup_strv_free_ char **names = NULL;
705 r = sd_bus_list_names(a, NULL, &names);
707 return synthetic_reply_method_errno(m, r, NULL);
709 /* Let's sort the names list to make it stable */
712 return synthetic_reply_return_strv(m, names);
714 } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "ListNames")) {
715 _cleanup_strv_free_ char **names = NULL;
717 r = sd_bus_list_names(a, &names, NULL);
719 return synthetic_reply_method_errno(m, r, NULL);
721 r = strv_extend(&names, "org.freedesktop.DBus");
723 return synthetic_reply_method_errno(m, r, NULL);
725 /* Let's sort the names list to make it stable */
728 return synthetic_reply_return_strv(m, names);
730 } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "ListQueuedOwners")) {
731 struct kdbus_cmd_name_list cmd = {};
732 struct kdbus_name_list *name_list;
733 struct kdbus_cmd_name *name;
734 _cleanup_strv_free_ char **owners = NULL;
738 r = sd_bus_message_read(m, "s", &arg0);
740 return synthetic_reply_method_errno(m, r, NULL);
742 if (!service_name_is_valid(arg0))
743 return synthetic_reply_method_errno(m, -EINVAL, NULL);
745 cmd.flags = KDBUS_NAME_LIST_QUEUED;
746 r = ioctl(a->input_fd, KDBUS_CMD_NAME_LIST, &cmd);
748 return synthetic_reply_method_errno(m, -errno, NULL);
750 name_list = (struct kdbus_name_list *) ((uint8_t *) a->kdbus_buffer + cmd.offset);
752 KDBUS_ITEM_FOREACH(name, name_list, names) {
753 const char *entry_name = NULL;
754 struct kdbus_item *item;
757 KDBUS_ITEM_FOREACH(item, name, items)
758 if (item->type == KDBUS_ITEM_NAME)
759 entry_name = item->str;
761 if (!streq_ptr(entry_name, arg0))
764 if (asprintf(&n, ":1.%llu", (unsigned long long) name->owner_id) < 0) {
769 r = strv_consume(&owners, n);
776 r = ioctl(a->input_fd, KDBUS_CMD_FREE, &cmd.offset);
778 return synthetic_reply_method_errno(m, r, NULL);
781 return synthetic_reply_method_errno(m, err, NULL);
783 return synthetic_reply_return_strv(m, owners);
785 } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "NameHasOwner")) {
788 r = sd_bus_message_read(m, "s", &name);
790 return synthetic_reply_method_errno(m, r, NULL);
792 if (!service_name_is_valid(name))
793 return synthetic_reply_method_errno(m, -EINVAL, NULL);
795 if (streq(name, "org.freedesktop.DBus"))
796 return synthetic_reply_method_return(m, "b", true);
798 r = sd_bus_get_owner(a, name, 0, NULL);
799 if (r < 0 && r != -ESRCH && r != -ENXIO)
800 return synthetic_reply_method_errno(m, r, NULL);
802 return synthetic_reply_method_return(m, "b", r >= 0);
804 } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "ReleaseName")) {
807 r = sd_bus_message_read(m, "s", &name);
809 return synthetic_reply_method_errno(m, r, NULL);
811 if (!service_name_is_valid(name))
812 return synthetic_reply_method_errno(m, -EINVAL, NULL);
814 r = sd_bus_release_name(a, name);
817 return synthetic_reply_method_return(m, "u", BUS_NAME_NON_EXISTENT);
818 if (r == -EADDRINUSE)
819 return synthetic_reply_method_return(m, "u", BUS_NAME_NOT_OWNER);
821 return synthetic_reply_method_errno(m, r, NULL);
824 return synthetic_reply_method_return(m, "u", BUS_NAME_RELEASED);
826 } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "ReloadConfig")) {
827 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
829 r = sd_bus_error_setf(&error, SD_BUS_ERROR_NOT_SUPPORTED, "%s() is not supported", sd_bus_message_get_member(m));
831 return synthetic_reply_method_errno(m, r, &error);
833 } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "RequestName")) {
837 r = sd_bus_message_read(m, "su", &name, &flags);
839 return synthetic_reply_method_errno(m, r, NULL);
841 if (!service_name_is_valid(name))
842 return synthetic_reply_method_errno(m, -EINVAL, NULL);
843 if ((flags & ~(BUS_NAME_ALLOW_REPLACEMENT|BUS_NAME_REPLACE_EXISTING|BUS_NAME_DO_NOT_QUEUE)) != 0)
844 return synthetic_reply_method_errno(m, -EINVAL, NULL);
846 r = sd_bus_request_name(a, name, flags);
849 return synthetic_reply_method_return(m, "u", BUS_NAME_EXISTS);
851 return synthetic_reply_method_return(m, "u", BUS_NAME_ALREADY_OWNER);
852 return synthetic_reply_method_errno(m, r, NULL);
856 return synthetic_reply_method_return(m, "u", BUS_NAME_IN_QUEUE);
858 return synthetic_reply_method_return(m, "u", BUS_NAME_PRIMARY_OWNER);
860 } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "StartServiceByName")) {
861 _cleanup_bus_message_unref_ sd_bus_message *msg = NULL;
865 r = sd_bus_message_read(m, "su", &name, &flags);
867 return synthetic_reply_method_errno(m, r, NULL);
869 if (!service_name_is_valid(name))
870 return synthetic_reply_method_errno(m, -EINVAL, NULL);
872 return synthetic_reply_method_errno(m, -EINVAL, NULL);
874 r = sd_bus_get_owner(a, name, 0, NULL);
875 if (r >= 0 || streq(name, "org.freedesktop.DBus"))
876 return synthetic_reply_method_return(m, "u", BUS_START_REPLY_ALREADY_RUNNING);
878 return synthetic_reply_method_errno(m, r, NULL);
880 r = sd_bus_message_new_method_call(
885 "org.freedesktop.DBus.Peer",
888 return synthetic_reply_method_errno(m, r, NULL);
890 r = sd_bus_send(a, msg, NULL);
892 return synthetic_reply_method_errno(m, r, NULL);
894 return synthetic_reply_method_return(m, "u", BUS_START_REPLY_SUCCESS);
896 } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "UpdateActivationEnvironment")) {
897 _cleanup_bus_message_unref_ sd_bus_message *msg = NULL;
898 _cleanup_strv_free_ char **args = NULL;
900 if (!peer_is_privileged(a, m))
901 return synthetic_reply_method_errno(m, -EPERM, NULL);
903 r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, "{ss}");
905 return synthetic_reply_method_errno(m, r, NULL);
907 while ((r = sd_bus_message_enter_container(m, SD_BUS_TYPE_DICT_ENTRY, "ss")) > 0) {
908 _cleanup_free_ char *s = NULL;
912 r = sd_bus_message_read(m, "ss", &key, &value);
914 return synthetic_reply_method_errno(m, r, NULL);
916 s = strjoin(key, "=", value, NULL);
918 return synthetic_reply_method_errno(m, -ENOMEM, NULL);
920 r = strv_extend(&args, s);
922 return synthetic_reply_method_errno(m, r, NULL);
924 r = sd_bus_message_exit_container(m);
926 return synthetic_reply_method_errno(m, r, NULL);
929 r = sd_bus_message_exit_container(m);
931 return synthetic_reply_method_errno(m, r, NULL);
934 return synthetic_reply_method_errno(m, -EINVAL, NULL);
936 r = sd_bus_message_new_method_call(
939 "org.freedesktop.systemd1",
940 "/org/freedesktop/systemd1",
941 "org.freedesktop.systemd1.Manager",
944 return synthetic_reply_method_errno(m, r, NULL);
946 r = sd_bus_message_append_strv(msg, args);
948 return synthetic_reply_method_errno(m, r, NULL);
950 r = sd_bus_call(a, msg, 0, NULL, NULL);
952 return synthetic_reply_method_errno(m, r, NULL);
954 return synthetic_reply_method_return(m, NULL);
957 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
959 r = sd_bus_error_setf(&error, SD_BUS_ERROR_UNKNOWN_METHOD, "Unknown method '%s'.", m->member);
961 return synthetic_reply_method_errno(m, r, &error);
965 static int process_hello(sd_bus *a, sd_bus *b, sd_bus_message *m, bool *got_hello) {
966 _cleanup_bus_message_unref_ sd_bus_message *n = NULL;
975 /* As reaction to hello we need to respond with two messages:
976 * the callback reply and the NameAcquired for the unique
977 * name, since hello is otherwise obsolete on kdbus. */
980 sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "Hello") &&
981 streq_ptr(m->destination, "org.freedesktop.DBus");
988 log_error("First packet isn't hello (it's %s.%s), aborting.", m->interface, m->member);
993 log_error("Got duplicate hello, aborting.");
1002 r = sd_bus_message_new_method_return(m, &n);
1004 log_error("Failed to generate HELLO reply: %s", strerror(-r));
1008 r = sd_bus_message_append(n, "s", a->unique_name);
1010 log_error("Failed to append unique name to HELLO reply: %s", strerror(-r));
1014 r = bus_message_append_sender(n, "org.freedesktop.DBus");
1016 log_error("Failed to append sender to HELLO reply: %s", strerror(-r));
1020 r = bus_seal_synthetic_message(b, n);
1022 log_error("Failed to seal HELLO reply: %s", strerror(-r));
1026 r = sd_bus_send(b, n, NULL);
1028 log_error("Failed to send HELLO reply: %s", strerror(-r));
1032 n = sd_bus_message_unref(n);
1033 r = sd_bus_message_new_signal(
1036 "/org/freedesktop/DBus",
1037 "org.freedesktop.DBus",
1040 log_error("Failed to allocate initial NameAcquired message: %s", strerror(-r));
1044 r = sd_bus_message_append(n, "s", a->unique_name);
1046 log_error("Failed to append unique name to NameAcquired message: %s", strerror(-r));
1050 r = bus_message_append_sender(n, "org.freedesktop.DBus");
1052 log_error("Failed to append sender to NameAcquired message: %s", strerror(-r));
1056 r = bus_seal_synthetic_message(b, n);
1058 log_error("Failed to seal NameAcquired message: %s", strerror(-r));
1062 r = sd_bus_send(b, n, NULL);
1064 log_error("Failed to send NameAcquired message: %s", strerror(-r));
1071 static int patch_sender(sd_bus *a, sd_bus_message *m) {
1072 char **well_known = NULL;
1082 /* We will change the sender of messages from the bus driver
1083 * so that they originate from the bus driver. This is a
1084 * speciality originating from dbus1, where the bus driver did
1085 * not have a unique id, but only the well-known name. */
1087 c = sd_bus_message_get_creds(m);
1091 r = sd_bus_creds_get_well_known_names(c, &well_known);
1095 if (strv_contains(well_known, "org.freedesktop.DBus"))
1096 m->sender = "org.freedesktop.DBus";
1101 int main(int argc, char *argv[]) {
1103 _cleanup_bus_close_unref_ sd_bus *a = NULL, *b = NULL;
1104 sd_id128_t server_id;
1105 int r, in_fd, out_fd;
1106 bool got_hello = false;
1108 struct ucred ucred = {};
1109 _cleanup_free_ char *peersec = NULL;
1112 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
1113 log_parse_environment();
1116 r = parse_argv(argc, argv);
1120 r = policy_load(&policy, arg_configuration);
1122 log_error("Failed to load policy: %s", strerror(-r));
1126 /* policy_dump(&policy); */
1128 r = sd_listen_fds(0);
1130 in_fd = STDIN_FILENO;
1131 out_fd = STDOUT_FILENO;
1132 } else if (r == 1) {
1133 in_fd = SD_LISTEN_FDS_START;
1134 out_fd = SD_LISTEN_FDS_START;
1136 log_error("Illegal number of file descriptors passed");
1141 sd_is_socket(in_fd, AF_UNIX, 0, 0) > 0 &&
1142 sd_is_socket(out_fd, AF_UNIX, 0, 0) > 0;
1145 getpeercred(in_fd, &ucred);
1146 getpeersec(in_fd, &peersec);
1149 if (arg_drop_privileges) {
1150 const char *user = "systemd-bus-proxy";
1154 r = get_user_creds(&user, &uid, &gid, NULL, NULL);
1156 log_error("Cannot resolve user name %s: %s", user, strerror(-r));
1160 r = drop_privileges(uid, gid, 1ULL << CAP_IPC_OWNER);
1167 log_error("Failed to allocate bus: %s", strerror(-r));
1171 r = sd_bus_set_name(a, "sd-proxy");
1173 log_error("Failed to set bus name: %s", strerror(-r));
1177 r = sd_bus_set_address(a, arg_address);
1179 log_error("Failed to set address to connect to: %s", strerror(-r));
1183 r = sd_bus_negotiate_fds(a, is_unix);
1185 log_error("Failed to set FD negotiation: %s", strerror(-r));
1189 if (ucred.pid > 0) {
1190 a->fake_creds.pid = ucred.pid;
1191 a->fake_creds.uid = ucred.uid;
1192 a->fake_creds.gid = ucred.gid;
1193 a->fake_creds_valid = true;
1197 a->fake_label = peersec;
1201 a->manual_peer_interface = true;
1203 r = sd_bus_start(a);
1205 log_error("Failed to start bus client: %s", strerror(-r));
1209 r = sd_bus_get_server_id(a, &server_id);
1211 log_error("Failed to get server ID: %s", strerror(-r));
1217 log_error("Failed to allocate bus: %s", strerror(-r));
1221 r = sd_bus_set_fd(b, in_fd, out_fd);
1223 log_error("Failed to set fds: %s", strerror(-r));
1227 r = sd_bus_set_server(b, 1, server_id);
1229 log_error("Failed to set server mode: %s", strerror(-r));
1233 r = sd_bus_negotiate_fds(b, is_unix);
1235 log_error("Failed to set FD negotiation: %s", strerror(-r));
1239 r = sd_bus_set_anonymous(b, true);
1241 log_error("Failed to set anonymous authentication: %s", strerror(-r));
1245 b->manual_peer_interface = true;
1247 r = sd_bus_start(b);
1249 log_error("Failed to start bus client: %s", strerror(-r));
1253 r = rename_service(a, b);
1255 log_debug("Failed to rename process: %s", strerror(-r));
1258 _cleanup_free_ char *match = NULL;
1261 r = sd_bus_get_unique_name(a, &unique);
1263 log_error("Failed to get unique name: %s", strerror(-r));
1267 match = strjoin("type='signal',"
1268 "sender='org.freedesktop.DBus',"
1269 "path='/org/freedesktop/DBus',"
1270 "interface='org.freedesktop.DBus',"
1271 "member='NameOwnerChanged',"
1281 r = sd_bus_add_match(a, NULL, match, NULL, NULL);
1283 log_error("Failed to add match for NameLost: %s", strerror(-r));
1288 match = strjoin("type='signal',"
1289 "sender='org.freedesktop.DBus',"
1290 "path='/org/freedesktop/DBus',"
1291 "interface='org.freedesktop.DBus',"
1292 "member='NameOwnerChanged',"
1302 r = sd_bus_add_match(a, NULL, match, NULL, NULL);
1304 log_error("Failed to add match for NameAcquired: %s", strerror(-r));
1310 _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
1311 int events_a, events_b, fd;
1312 uint64_t timeout_a, timeout_b, t;
1313 struct timespec _ts, *ts;
1314 struct pollfd *pollfd;
1318 r = sd_bus_process(a, &m);
1320 /* treat 'connection reset by peer' as clean exit condition */
1321 if (r == -ECONNRESET)
1324 log_error("Failed to process bus a: %s", strerror(-r));
1330 /* We officially got EOF, let's quit */
1331 if (sd_bus_message_is_signal(m, "org.freedesktop.DBus.Local", "Disconnected")) {
1336 k = synthesize_name_acquired(a, b, m);
1339 log_error("Failed to synthesize message: %s", strerror(-r));
1345 k = sd_bus_send(b, m, NULL);
1347 if (k == -ECONNRESET)
1351 log_error("Failed to send message: %s", strerror(-r));
1362 r = sd_bus_process(b, &m);
1364 /* treat 'connection reset by peer' as clean exit condition */
1365 if (r == -ECONNRESET)
1368 log_error("Failed to process bus b: %s", strerror(-r));
1374 /* We officially got EOF, let's quit */
1375 if (sd_bus_message_is_signal(m, "org.freedesktop.DBus.Local", "Disconnected")) {
1380 k = process_hello(a, b, m, &got_hello);
1383 log_error("Failed to process HELLO: %s", strerror(-r));
1390 k = process_policy(a, b, m);
1393 log_error("Failed to process policy: %s", strerror(-r));
1397 k = process_driver(a, b, m);
1400 log_error("Failed to process driver calls: %s", strerror(-r));
1407 k = sd_bus_send(a, m, NULL);
1409 if (k == -ECONNRESET)
1413 log_error("Failed to send message: %s", strerror(-r));
1425 fd = sd_bus_get_fd(a);
1427 log_error("Failed to get fd: %s", strerror(-r));
1431 events_a = sd_bus_get_events(a);
1433 log_error("Failed to get events mask: %s", strerror(-r));
1437 r = sd_bus_get_timeout(a, &timeout_a);
1439 log_error("Failed to get timeout: %s", strerror(-r));
1443 events_b = sd_bus_get_events(b);
1445 log_error("Failed to get events mask: %s", strerror(-r));
1449 r = sd_bus_get_timeout(b, &timeout_b);
1451 log_error("Failed to get timeout: %s", strerror(-r));
1456 if (t == (uint64_t) -1 || (timeout_b != (uint64_t) -1 && timeout_b < timeout_a))
1459 if (t == (uint64_t) -1)
1464 nw = now(CLOCK_MONOTONIC);
1470 ts = timespec_store(&_ts, t);
1473 pollfd = (struct pollfd[3]) {
1474 {.fd = fd, .events = events_a, },
1475 {.fd = in_fd, .events = events_b & POLLIN, },
1476 {.fd = out_fd, .events = events_b & POLLOUT, }
1479 r = ppoll(pollfd, 3, ts, NULL);
1481 log_error("ppoll() failed: %m");
1489 "STATUS=Shutting down.");
1491 policy_free(&policy);
1492 strv_free(arg_configuration);
1495 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;