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"
35 static bool arg_no_pager = false;
36 static char *arg_address = NULL;
37 static bool arg_no_unique = false;
38 static char **arg_matches = NULL;
39 static BusTransport arg_transport = BUS_TRANSPORT_LOCAL;
40 static char *arg_host = NULL;
41 static bool arg_user = false;
43 static void pager_open_if_enabled(void) {
45 /* Cache result before we open the pager */
52 static int list_bus_names(sd_bus *bus, char **argv) {
53 _cleanup_strv_free_ char **l = NULL;
60 r = sd_bus_list_names(bus, &l);
62 log_error("Failed to list names: %s", strerror(-r));
66 pager_open_if_enabled();
71 max_i = MAX(max_i, strlen(*i));
73 printf("%-*s %*s %-*s %-*s CONNECTION\n",
74 (int) max_i, "NAME", 10, "PID", 15, "PROCESS", 16, "USER");
77 _cleanup_free_ char *owner = NULL;
81 if (arg_no_unique && (*i)[0] == ':')
84 printf("%-*s", (int) max_i, *i);
86 r = sd_bus_get_owner_pid(bus, *i, &pid);
88 _cleanup_free_ char *comm = NULL;
90 printf(" %10lu", (unsigned long) pid);
92 get_process_comm(pid, &comm);
93 printf(" %-15s", strna(comm));
97 r = sd_bus_get_owner_uid(bus, *i, &uid);
99 _cleanup_free_ char *u = NULL;
101 u = uid_to_name(uid);
112 r = sd_bus_get_owner(bus, *i, &owner);
114 printf(" %s\n", owner);
122 static int monitor(sd_bus *bus, char *argv[]) {
126 STRV_FOREACH(i, argv+1) {
127 _cleanup_free_ char *m = NULL;
129 if (!service_name_is_valid(*i)) {
130 log_error("Invalid service name '%s'", *i);
134 m = strjoin("sender='", *i, "'", NULL);
138 r = sd_bus_add_match(bus, m, NULL, NULL);
140 log_error("Failed to add match: %s", strerror(-r));
145 STRV_FOREACH(i, arg_matches) {
146 r = sd_bus_add_match(bus, *i, NULL, NULL);
148 log_error("Failed to add match: %s", strerror(-r));
154 _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
156 r = sd_bus_process(bus, &m);
158 log_error("Failed to process bus: %s", strerror(-r));
163 bus_message_dump(m, stdout, true);
170 r = sd_bus_wait(bus, (uint64_t) -1);
172 log_error("Failed to wait for bus: %s", strerror(-r));
180 static int help(void) {
182 printf("%s [OPTIONS...] {COMMAND} ...\n\n"
183 "Introspect the bus.\n\n"
184 " -h --help Show this help\n"
185 " --version Show package version\n"
186 " --no-pager Do not pipe output into a pager\n"
187 " --system Connect to system bus\n"
188 " --user Connect to user bus\n"
189 " -H --host=[USER@]HOST Operate on remote host\n"
190 " -M --machine=CONTAINER Operate on local container\n"
191 " --address=ADDRESS Connect to bus specified by address\n"
192 " --no-unique Only show well-known names\n"
193 " --match=MATCH Only show matching messages\n\n"
195 " list List bus names\n"
196 " monitor [SERVICE...] Show bus traffic\n",
197 program_invocation_short_name);
202 static int parse_argv(int argc, char *argv[]) {
214 static const struct option options[] = {
215 { "help", no_argument, NULL, 'h' },
216 { "version", no_argument, NULL, ARG_VERSION },
217 { "no-pager", no_argument, NULL, ARG_NO_PAGER },
218 { "system", no_argument, NULL, ARG_SYSTEM },
219 { "user", no_argument, NULL, ARG_USER },
220 { "address", required_argument, NULL, ARG_ADDRESS },
221 { "no-unique", no_argument, NULL, ARG_NO_UNIQUE },
222 { "match", required_argument, NULL, ARG_MATCH },
223 { "host", required_argument, NULL, 'H' },
224 { "machine", required_argument, NULL, 'M' },
233 while ((c = getopt_long(argc, argv, "hH:M:", options, NULL)) >= 0) {
241 puts(PACKAGE_STRING);
242 puts(SYSTEMD_FEATURES);
258 arg_address = optarg;
262 arg_no_unique = true;
266 if (strv_extend(&arg_matches, optarg) < 0)
271 arg_transport = BUS_TRANSPORT_REMOTE;
276 arg_transport = BUS_TRANSPORT_CONTAINER;
284 assert_not_reached("Unhandled option");
291 static int busctl_main(sd_bus *bus, int argc, char *argv[]) {
294 if (optind >= argc ||
295 streq(argv[optind], "list"))
296 return list_bus_names(bus, argv + optind);
298 if (streq(argv[optind], "monitor"))
299 return monitor(bus, argv + optind);
301 if (streq(argv[optind], "help"))
304 log_error("Unknown command '%s'", argv[optind]);
308 int main(int argc, char *argv[]) {
309 _cleanup_bus_unref_ sd_bus *bus = NULL;
312 log_parse_environment();
315 r = parse_argv(argc, argv);
320 r = sd_bus_new(&bus);
322 log_error("Failed to allocate bus: %s", strerror(-r));
326 r = sd_bus_set_address(bus, arg_address);
328 log_error("Failed to set address: %s", strerror(-r));
332 r = sd_bus_set_bus_client(bus, true);
334 log_error("Failed to set bus client: %s", strerror(-r));
338 r = sd_bus_start(bus);
340 r = bus_open_transport(arg_transport, arg_host, arg_user, &bus);
343 log_error("Failed to connect to bus: %s", strerror(-r));
347 r = busctl_main(bus, argc, argv);
352 strv_free(arg_matches);
354 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;