1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2012 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-error.h"
33 #include "spawn-polkit-agent.h"
36 #include "architecture.h"
38 static bool arg_ask_password = true;
39 static BusTransport arg_transport = BUS_TRANSPORT_LOCAL;
40 static char *arg_host = NULL;
41 static bool arg_transient = false;
42 static bool arg_pretty = false;
43 static bool arg_static = false;
45 static void polkit_agent_open_if_enabled(void) {
47 /* Open the polkit agent as a child process if necessary */
48 if (!arg_ask_password)
51 if (arg_transport != BUS_TRANSPORT_LOCAL)
57 typedef struct StatusInfo {
59 char *static_hostname;
60 char *pretty_hostname;
73 static void print_status_info(StatusInfo *i) {
74 sd_id128_t mid = {}, bid = {};
79 printf(" Static hostname: %s\n", strna(i->static_hostname));
81 if (!isempty(i->pretty_hostname) &&
82 !streq_ptr(i->pretty_hostname, i->static_hostname))
83 printf(" Pretty hostname: %s\n", i->pretty_hostname);
85 if (!isempty(i->hostname) &&
86 !streq_ptr(i->hostname, i->static_hostname))
87 printf("Transient hostname: %s\n", i->hostname);
89 if (!isempty(i->icon_name))
90 printf(" Icon name: %s\n",
93 if (!isempty(i->chassis))
94 printf(" Chassis: %s\n",
97 if (!isempty(i->deployment))
98 printf(" Deployment: %s\n", i->deployment);
100 if (!isempty(i->location))
101 printf(" Location: %s\n", i->location);
103 r = sd_id128_get_machine(&mid);
105 printf(" Machine ID: " SD_ID128_FORMAT_STR "\n", SD_ID128_FORMAT_VAL(mid));
107 r = sd_id128_get_boot(&bid);
109 printf(" Boot ID: " SD_ID128_FORMAT_STR "\n", SD_ID128_FORMAT_VAL(bid));
111 if (!isempty(i->virtualization))
112 printf(" Virtualization: %s\n", i->virtualization);
114 if (!isempty(i->os_pretty_name))
115 printf(" Operating System: %s\n", i->os_pretty_name);
117 if (!isempty(i->os_cpe_name))
118 printf(" CPE OS Name: %s\n", i->os_cpe_name);
120 if (!isempty(i->kernel_name) && !isempty(i->kernel_release))
121 printf(" Kernel: %s %s\n", i->kernel_name, i->kernel_release);
123 if (!isempty(i->architecture))
124 printf(" Architecture: %s\n", i->architecture);
128 static int show_one_name(sd_bus *bus, const char* attr) {
129 _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
130 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
134 r = sd_bus_get_property(
136 "org.freedesktop.hostname1",
137 "/org/freedesktop/hostname1",
138 "org.freedesktop.hostname1",
140 &error, &reply, "s");
142 log_error("Could not get property: %s", bus_error_message(&error, -r));
146 r = sd_bus_message_read(reply, "s", &s);
148 return bus_log_parse_error(r);
155 static int show_all_names(sd_bus *bus) {
156 StatusInfo info = {};
158 static const struct bus_properties_map hostname_map[] = {
159 { "Hostname", "s", NULL, offsetof(StatusInfo, hostname) },
160 { "StaticHostname", "s", NULL, offsetof(StatusInfo, static_hostname) },
161 { "PrettyHostname", "s", NULL, offsetof(StatusInfo, pretty_hostname) },
162 { "IconName", "s", NULL, offsetof(StatusInfo, icon_name) },
163 { "Chassis", "s", NULL, offsetof(StatusInfo, chassis) },
164 { "Deployment", "s", NULL, offsetof(StatusInfo, deployment) },
165 { "Location", "s", NULL, offsetof(StatusInfo, location) },
166 { "KernelName", "s", NULL, offsetof(StatusInfo, kernel_name) },
167 { "KernelRelease", "s", NULL, offsetof(StatusInfo, kernel_release) },
168 { "OperatingSystemPrettyName", "s", NULL, offsetof(StatusInfo, os_pretty_name) },
169 { "OperatingSystemCPEName", "s", NULL, offsetof(StatusInfo, os_cpe_name) },
173 static const struct bus_properties_map manager_map[] = {
174 { "Virtualization", "s", NULL, offsetof(StatusInfo, virtualization) },
175 { "Architecture", "s", NULL, offsetof(StatusInfo, architecture) },
181 r = bus_map_all_properties(bus,
182 "org.freedesktop.hostname1",
183 "/org/freedesktop/hostname1",
189 bus_map_all_properties(bus,
190 "org.freedesktop.systemd1",
191 "/org/freedesktop/systemd1",
195 print_status_info(&info);
199 free(info.static_hostname);
200 free(info.pretty_hostname);
201 free(info.icon_name);
203 free(info.deployment);
205 free(info.kernel_name);
206 free(info.kernel_release);
207 free(info.os_pretty_name);
208 free(info.os_cpe_name);
209 free(info.virtualization);
210 free(info.architecture);
215 static int show_status(sd_bus *bus, char **args, unsigned n) {
218 if (arg_pretty || arg_static || arg_transient) {
221 if (!!arg_static + !!arg_pretty + !!arg_transient > 1) {
222 log_error("Cannot query more than one name type at a time");
226 attr = arg_pretty ? "PrettyHostname" :
227 arg_static ? "StaticHostname" : "Hostname";
229 return show_one_name(bus, attr);
231 return show_all_names(bus);
234 static int set_simple_string(sd_bus *bus, const char *method, const char *value) {
235 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
238 polkit_agent_open_if_enabled();
240 r = sd_bus_call_method(
242 "org.freedesktop.hostname1",
243 "/org/freedesktop/hostname1",
244 "org.freedesktop.hostname1",
247 "sb", value, arg_ask_password);
249 log_error("Could not set property: %s", bus_error_message(&error, -r));
253 static int set_hostname(sd_bus *bus, char **args, unsigned n) {
254 _cleanup_free_ char *h = NULL;
255 const char *hostname = args[1];
261 if (!arg_pretty && !arg_static && !arg_transient)
262 arg_pretty = arg_static = arg_transient = true;
267 /* If the passed hostname is already valid, then
268 * assume the user doesn't know anything about pretty
269 * hostnames, so let's unset the pretty hostname, and
270 * just set the passed hostname as static/dynamic
273 h = strdup(hostname);
277 hostname_cleanup(h, true);
279 if (arg_static && streq(h, hostname))
286 r = set_simple_string(bus, "SetPrettyHostname", p);
292 r = set_simple_string(bus, "SetStaticHostname", hostname);
298 r = set_simple_string(bus, "SetHostname", hostname);
306 static int set_icon_name(sd_bus *bus, char **args, unsigned n) {
310 return set_simple_string(bus, "SetIconName", args[1]);
313 static int set_chassis(sd_bus *bus, char **args, unsigned n) {
317 return set_simple_string(bus, "SetChassis", args[1]);
320 static int set_deployment(sd_bus *bus, char **args, unsigned n) {
324 return set_simple_string(bus, "SetDeployment", args[1]);
327 static int set_location(sd_bus *bus, char **args, unsigned n) {
331 return set_simple_string(bus, "SetLocation", args[1]);
334 static void help(void) {
335 printf("%s [OPTIONS...] COMMAND ...\n\n"
336 "Query or change system hostname.\n\n"
337 " -h --help Show this help\n"
338 " --version Show package version\n"
339 " --no-ask-password Do not prompt for password\n"
340 " -H --host=[USER@]HOST Operate on remote host\n"
341 " -M --machine=CONTAINER Operate on local container\n"
342 " --transient Only set transient hostname\n"
343 " --static Only set static hostname\n"
344 " --pretty Only set pretty hostname\n\n"
346 " status Show current hostname settings\n"
347 " set-hostname NAME Set system hostname\n"
348 " set-icon-name NAME Set icon name for host\n"
349 " set-chassis NAME Set chassis type for host\n"
350 " set-deployment NAME Set deployment environment for host\n"
351 " set-location NAME Set location for host\n"
352 , program_invocation_short_name);
355 static int parse_argv(int argc, char *argv[]) {
365 static const struct option options[] = {
366 { "help", no_argument, NULL, 'h' },
367 { "version", no_argument, NULL, ARG_VERSION },
368 { "transient", no_argument, NULL, ARG_TRANSIENT },
369 { "static", no_argument, NULL, ARG_STATIC },
370 { "pretty", no_argument, NULL, ARG_PRETTY },
371 { "host", required_argument, NULL, 'H' },
372 { "machine", required_argument, NULL, 'M' },
373 { "no-ask-password", no_argument, NULL, ARG_NO_ASK_PASSWORD },
382 while ((c = getopt_long(argc, argv, "hH:M:", options, NULL)) >= 0)
391 puts(PACKAGE_STRING);
392 puts(SYSTEMD_FEATURES);
396 arg_transport = BUS_TRANSPORT_REMOTE;
401 arg_transport = BUS_TRANSPORT_MACHINE;
406 arg_transient = true;
417 case ARG_NO_ASK_PASSWORD:
418 arg_ask_password = false;
425 assert_not_reached("Unhandled option");
431 static int hostnamectl_main(sd_bus *bus, int argc, char *argv[]) {
433 static const struct {
441 int (* const dispatch)(sd_bus *bus, char **args, unsigned n);
443 { "status", LESS, 1, show_status },
444 { "set-hostname", EQUAL, 2, set_hostname },
445 { "set-icon-name", EQUAL, 2, set_icon_name },
446 { "set-chassis", EQUAL, 2, set_chassis },
447 { "set-deployment", EQUAL, 2, set_deployment },
448 { "set-location", EQUAL, 2, set_location },
457 left = argc - optind;
460 /* Special rule: no arguments means "status" */
463 if (streq(argv[optind], "help")) {
468 for (i = 0; i < ELEMENTSOF(verbs); i++)
469 if (streq(argv[optind], verbs[i].verb))
472 if (i >= ELEMENTSOF(verbs)) {
473 log_error("Unknown operation %s", argv[optind]);
478 switch (verbs[i].argc_cmp) {
481 if (left != verbs[i].argc) {
482 log_error("Invalid number of arguments.");
489 if (left < verbs[i].argc) {
490 log_error("Too few arguments.");
497 if (left > verbs[i].argc) {
498 log_error("Too many arguments.");
505 assert_not_reached("Unknown comparison operator.");
508 return verbs[i].dispatch(bus, argv + optind, left);
511 int main(int argc, char *argv[]) {
512 _cleanup_bus_close_unref_ sd_bus *bus = NULL;
515 setlocale(LC_ALL, "");
516 log_parse_environment();
519 r = parse_argv(argc, argv);
523 r = bus_open_transport(arg_transport, arg_host, false, &bus);
525 log_error_errno(r, "Failed to create bus connection: %m");
529 r = hostnamectl_main(bus, argc, argv);
532 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;