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/>.
31 #include "bus-message.h"
32 #include "bus-internal.h"
36 static bool arg_no_pager = false;
37 static char *arg_address = NULL;
38 static bool arg_no_unique = false;
39 static bool arg_no_machine = false;
40 static char **arg_matches = NULL;
41 static BusTransport arg_transport = BUS_TRANSPORT_LOCAL;
42 static char *arg_host = NULL;
43 static bool arg_user = false;
45 static void pager_open_if_enabled(void) {
47 /* Cache result before we open the pager */
54 static int list_bus_names(sd_bus *bus, char **argv) {
55 _cleanup_strv_free_ char **l = NULL;
62 r = sd_bus_list_names(bus, &l);
64 log_error("Failed to list names: %s", strerror(-r));
68 pager_open_if_enabled();
73 max_i = MAX(max_i, strlen(*i));
75 printf("%-*s %*s %-*s %-*s %-*s",
76 (int) max_i, "NAME", 10, "PID", 15, "PROCESS", 16, "USER", 20, "CONNECTION");
84 _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
85 _cleanup_free_ char *owner = NULL;
88 if (arg_no_unique && (*i)[0] == ':')
91 /* Skip the bus driver */
92 if (streq(*i, "org.freedesktop.DBus"))
95 printf("%-*s", (int) max_i, *i);
97 r = sd_bus_get_owner(bus, *i, SD_BUS_CREDS_UID|SD_BUS_CREDS_PID|SD_BUS_CREDS_COMM, &owner, &creds);
102 r = sd_bus_creds_get_pid(creds, &pid);
104 const char *comm = NULL;
106 sd_bus_creds_get_comm(creds, &comm);
108 printf(" %10lu %-15s", (unsigned long) pid, strna(comm));
110 fputs(" - - ", stdout);
112 r = sd_bus_creds_get_uid(creds, &uid);
114 _cleanup_free_ char *u = NULL;
116 u = uid_to_name(uid);
125 fputs(" - ", stdout);
128 printf(" %-20s", owner);
130 fputs(" - ", stdout);
138 r = sd_bus_get_owner_machine_id(bus, *i, &mid);
140 char m[SD_ID128_STRING_MAX];
141 printf(" %s\n", sd_id128_to_string(mid, m));
150 static int monitor(sd_bus *bus, char *argv[]) {
151 bool added_something = false;
155 STRV_FOREACH(i, argv+1) {
156 _cleanup_free_ char *m = NULL;
158 if (!service_name_is_valid(*i)) {
159 log_error("Invalid service name '%s'", *i);
163 m = strjoin("sender='", *i, "'", NULL);
167 r = sd_bus_add_match(bus, m, NULL, NULL);
169 log_error("Failed to add match: %s", strerror(-r));
173 added_something = true;
176 STRV_FOREACH(i, arg_matches) {
177 r = sd_bus_add_match(bus, *i, NULL, NULL);
179 log_error("Failed to add match: %s", strerror(-r));
183 added_something = true;
186 if (!added_something) {
187 r = sd_bus_add_match(bus, "", NULL, NULL);
189 log_error("Failed to add match: %s", strerror(-r));
195 _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
197 r = sd_bus_process(bus, &m);
199 log_error("Failed to process bus: %s", strerror(-r));
204 bus_message_dump(m, stdout, true);
211 r = sd_bus_wait(bus, (uint64_t) -1);
213 log_error("Failed to wait for bus: %s", strerror(-r));
221 static int help(void) {
223 printf("%s [OPTIONS...] {COMMAND} ...\n\n"
224 "Introspect the bus.\n\n"
225 " -h --help Show this help\n"
226 " --version Show package version\n"
227 " --no-pager Do not pipe output into a pager\n"
228 " --system Connect to system bus\n"
229 " --user Connect to user bus\n"
230 " -H --host=[USER@]HOST Operate on remote host\n"
231 " -M --machine=CONTAINER Operate on local container\n"
232 " --address=ADDRESS Connect to bus specified by address\n"
233 " --no-unique Only show well-known names\n"
234 " --no-machine Don't show machine ID column in list\n"
235 " --match=MATCH Only show matching messages\n\n"
237 " list List bus names\n"
238 " monitor [SERVICE...] Show bus traffic\n",
239 program_invocation_short_name);
244 static int parse_argv(int argc, char *argv[]) {
257 static const struct option options[] = {
258 { "help", no_argument, NULL, 'h' },
259 { "version", no_argument, NULL, ARG_VERSION },
260 { "no-pager", no_argument, NULL, ARG_NO_PAGER },
261 { "system", no_argument, NULL, ARG_SYSTEM },
262 { "user", no_argument, NULL, ARG_USER },
263 { "address", required_argument, NULL, ARG_ADDRESS },
264 { "no-unique", no_argument, NULL, ARG_NO_UNIQUE },
265 { "no-machine", no_argument, NULL, ARG_NO_MACHINE },
266 { "match", required_argument, NULL, ARG_MATCH },
267 { "host", required_argument, NULL, 'H' },
268 { "machine", required_argument, NULL, 'M' },
277 while ((c = getopt_long(argc, argv, "hH:M:", options, NULL)) >= 0) {
285 puts(PACKAGE_STRING);
286 puts(SYSTEMD_FEATURES);
302 arg_address = optarg;
306 arg_no_unique = true;
310 arg_no_machine = true;
314 if (strv_extend(&arg_matches, optarg) < 0)
319 arg_transport = BUS_TRANSPORT_REMOTE;
324 arg_transport = BUS_TRANSPORT_CONTAINER;
332 assert_not_reached("Unhandled option");
339 static int busctl_main(sd_bus *bus, int argc, char *argv[]) {
342 if (optind >= argc ||
343 streq(argv[optind], "list"))
344 return list_bus_names(bus, argv + optind);
346 if (streq(argv[optind], "monitor"))
347 return monitor(bus, argv + optind);
349 if (streq(argv[optind], "help"))
352 log_error("Unknown command '%s'", argv[optind]);
356 int main(int argc, char *argv[]) {
357 _cleanup_bus_unref_ sd_bus *bus = NULL;
360 log_parse_environment();
363 r = parse_argv(argc, argv);
368 r = sd_bus_new(&bus);
370 log_error("Failed to allocate bus: %s", strerror(-r));
374 r = sd_bus_set_address(bus, arg_address);
376 log_error("Failed to set address: %s", strerror(-r));
380 r = sd_bus_set_bus_client(bus, true);
382 log_error("Failed to set bus client: %s", strerror(-r));
386 r = sd_bus_start(bus);
388 r = bus_open_transport(arg_transport, arg_host, arg_user, &bus);
391 log_error("Failed to connect to bus: %s", strerror(-r));
395 r = busctl_main(bus, argc, argv);
400 strv_free(arg_matches);
402 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;