[thirdparty/systemd.git] / src / hostname / hostnamectl.c

/***
  This file is part of systemd.

  Copyright 2012 Lennart Poettering

  systemd is free software; you can redistribute it and/or modify it
  under the terms of the GNU Lesser General Public License as published by
  the Free Software Foundation; either version 2.1 of the License, or
  (at your option) any later version.

  systemd is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public License
  along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/

#include <getopt.h>
#include <locale.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>

#include "sd-bus.h"
#include "sd-id128.h"

#include "alloc-util.h"
#include "architecture.h"
#include "bus-error.h"
#include "bus-util.h"
#include "hostname-util.h"
#include "spawn-polkit-agent.h"
#include "util.h"

static bool arg_ask_password = true;
static BusTransport arg_transport = BUS_TRANSPORT_LOCAL;
static char *arg_host = NULL;
static bool arg_transient = false;
static bool arg_pretty = false;
static bool arg_static = false;

static void polkit_agent_open_if_enabled(void) {

        /* Open the polkit agent as a child process if necessary */
        if (!arg_ask_password)
                return;

        if (arg_transport != BUS_TRANSPORT_LOCAL)
                return;

        polkit_agent_open();
}

typedef struct StatusInfo {
        char *hostname;
        char *static_hostname;
        char *pretty_hostname;
        char *icon_name;
        char *chassis;
        char *deployment;
        char *location;
        char *kernel_name;
        char *kernel_release;
        char *os_pretty_name;
        char *os_cpe_name;
        char *virtualization;
        char *architecture;
} StatusInfo;

static void print_status_info(StatusInfo *i) {
        sd_id128_t mid = {}, bid = {};
        int r;

        assert(i);

        printf("   Static hostname: %s\n", strna(i->static_hostname));

        if (!isempty(i->pretty_hostname) &&
            !streq_ptr(i->pretty_hostname, i->static_hostname))
                printf("   Pretty hostname: %s\n", i->pretty_hostname);

        if (!isempty(i->hostname) &&
            !streq_ptr(i->hostname, i->static_hostname))
                printf("Transient hostname: %s\n", i->hostname);

        if (!isempty(i->icon_name))
                printf("         Icon name: %s\n",
                       strna(i->icon_name));

        if (!isempty(i->chassis))
                printf("           Chassis: %s\n",
                       strna(i->chassis));

        if (!isempty(i->deployment))
                printf("        Deployment: %s\n", i->deployment);

        if (!isempty(i->location))
                printf("          Location: %s\n", i->location);

        r = sd_id128_get_machine(&mid);
        if (r >= 0)
                printf("        Machine ID: " SD_ID128_FORMAT_STR "\n", SD_ID128_FORMAT_VAL(mid));

        r = sd_id128_get_boot(&bid);
        if (r >= 0)
                printf("           Boot ID: " SD_ID128_FORMAT_STR "\n", SD_ID128_FORMAT_VAL(bid));

        if (!isempty(i->virtualization))
                printf("    Virtualization: %s\n", i->virtualization);

        if (!isempty(i->os_pretty_name))
                printf("  Operating System: %s\n", i->os_pretty_name);

        if (!isempty(i->os_cpe_name))
                printf("       CPE OS Name: %s\n", i->os_cpe_name);

        if (!isempty(i->kernel_name) && !isempty(i->kernel_release))
                printf("            Kernel: %s %s\n", i->kernel_name, i->kernel_release);

        if (!isempty(i->architecture))
                printf("      Architecture: %s\n", i->architecture);

}

static int show_one_name(sd_bus *bus, const char* attr) {
        _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
        _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
        const char *s;
        int r;

        r = sd_bus_get_property(
                        bus,
                        "org.freedesktop.hostname1",
                        "/org/freedesktop/hostname1",
                        "org.freedesktop.hostname1",
                        attr,
                        &error, &reply, "s");
        if (r < 0) {
                log_error("Could not get property: %s", bus_error_message(&error, -r));
                return r;
        }

        r = sd_bus_message_read(reply, "s", &s);
        if (r < 0)
                return bus_log_parse_error(r);

        printf("%s\n", s);

        return 0;
}

static int show_all_names(sd_bus *bus) {
        StatusInfo info = {};

        static const struct bus_properties_map hostname_map[]  = {
                { "Hostname",                  "s", NULL, offsetof(StatusInfo, hostname)        },
                { "StaticHostname",            "s", NULL, offsetof(StatusInfo, static_hostname) },
                { "PrettyHostname",            "s", NULL, offsetof(StatusInfo, pretty_hostname) },
                { "IconName",                  "s", NULL, offsetof(StatusInfo, icon_name)       },
                { "Chassis",                   "s", NULL, offsetof(StatusInfo, chassis)         },
                { "Deployment",                "s", NULL, offsetof(StatusInfo, deployment)      },
                { "Location",                  "s", NULL, offsetof(StatusInfo, location)        },
                { "KernelName",                "s", NULL, offsetof(StatusInfo, kernel_name)     },
                { "KernelRelease",             "s", NULL, offsetof(StatusInfo, kernel_release)  },
                { "OperatingSystemPrettyName", "s", NULL, offsetof(StatusInfo, os_pretty_name)  },
                { "OperatingSystemCPEName",    "s", NULL, offsetof(StatusInfo, os_cpe_name)     },
                {}
        };

        static const struct bus_properties_map manager_map[] = {
                { "Virtualization",            "s", NULL, offsetof(StatusInfo, virtualization)  },
                { "Architecture",              "s", NULL, offsetof(StatusInfo, architecture)    },
                {}
        };

        int r;

        r = bus_map_all_properties(bus,
                                   "org.freedesktop.hostname1",
                                   "/org/freedesktop/hostname1",
                                   hostname_map,
                                   &info);
        if (r < 0)
                goto fail;

        bus_map_all_properties(bus,
                               "org.freedesktop.systemd1",
                               "/org/freedesktop/systemd1",
                               manager_map,
                               &info);

        print_status_info(&info);

fail:
        free(info.hostname);
        free(info.static_hostname);
        free(info.pretty_hostname);
        free(info.icon_name);
        free(info.chassis);
        free(info.deployment);
        free(info.location);
        free(info.kernel_name);
        free(info.kernel_release);
        free(info.os_pretty_name);
        free(info.os_cpe_name);
        free(info.virtualization);
        free(info.architecture);

        return r;
}

static int show_status(sd_bus *bus, char **args, unsigned n) {
        assert(args);

        if (arg_pretty || arg_static || arg_transient) {
                const char *attr;

                if (!!arg_static + !!arg_pretty + !!arg_transient > 1) {
                        log_error("Cannot query more than one name type at a time");
                        return -EINVAL;
                }

                attr = arg_pretty ? "PrettyHostname" :
                        arg_static ? "StaticHostname" : "Hostname";

                return show_one_name(bus, attr);
        } else
                return show_all_names(bus);
}

static int set_simple_string(sd_bus *bus, const char *method, const char *value) {
        _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
        int r = 0;

        polkit_agent_open_if_enabled();

        r = sd_bus_call_method(
                        bus,
                        "org.freedesktop.hostname1",
                        "/org/freedesktop/hostname1",
                        "org.freedesktop.hostname1",
                        method,
                        &error, NULL,
                        "sb", value, arg_ask_password);
        if (r < 0)
                log_error("Could not set property: %s", bus_error_message(&error, -r));
        return r;
}

static int set_hostname(sd_bus *bus, char **args, unsigned n) {
        _cleanup_free_ char *h = NULL;
        char *hostname = args[1];
        int r;

        assert(args);
        assert(n == 2);

        if (!arg_pretty && !arg_static && !arg_transient)
                arg_pretty = arg_static = arg_transient = true;

        if (arg_pretty) {
                const char *p;

                /* If the passed hostname is already valid, then
                 * assume the user doesn't know anything about pretty
                 * hostnames, so let's unset the pretty hostname, and
                 * just set the passed hostname as static/dynamic
                 * hostname. */

                if (arg_static && hostname_is_valid(hostname, true)) {
                        p = "";
                        /* maybe get rid of trailing dot */
                        hostname = hostname_cleanup(hostname);
                } else {
                        p = h = strdup(hostname);
                        if (!p)
                                return log_oom();

                        hostname_cleanup(hostname);
                }

                r = set_simple_string(bus, "SetPrettyHostname", p);
                if (r < 0)
                        return r;
        }

        if (arg_static) {
                r = set_simple_string(bus, "SetStaticHostname", hostname);
                if (r < 0)
                        return r;
        }

        if (arg_transient) {
                r = set_simple_string(bus, "SetHostname", hostname);
                if (r < 0)
                        return r;
        }

        return 0;
}

static int set_icon_name(sd_bus *bus, char **args, unsigned n) {
        assert(args);
        assert(n == 2);

        return set_simple_string(bus, "SetIconName", args[1]);
}

static int set_chassis(sd_bus *bus, char **args, unsigned n) {
        assert(args);
        assert(n == 2);

        return set_simple_string(bus, "SetChassis", args[1]);
}

static int set_deployment(sd_bus *bus, char **args, unsigned n) {
        assert(args);
        assert(n == 2);

        return set_simple_string(bus, "SetDeployment", args[1]);
}

static int set_location(sd_bus *bus, char **args, unsigned n) {
        assert(args);
        assert(n == 2);

        return set_simple_string(bus, "SetLocation", args[1]);
}

static void help(void) {
        printf("%s [OPTIONS...] COMMAND ...\n\n"
               "Query or change system hostname.\n\n"
               "  -h --help              Show this help\n"
               "     --version           Show package version\n"
               "     --no-ask-password   Do not prompt for password\n"
               "  -H --host=[USER@]HOST  Operate on remote host\n"
               "  -M --machine=CONTAINER Operate on local container\n"
               "     --transient         Only set transient hostname\n"
               "     --static            Only set static hostname\n"
               "     --pretty            Only set pretty hostname\n\n"
               "Commands:\n"
               "  status                 Show current hostname settings\n"
               "  set-hostname NAME      Set system hostname\n"
               "  set-icon-name NAME     Set icon name for host\n"
               "  set-chassis NAME       Set chassis type for host\n"
               "  set-deployment NAME    Set deployment environment for host\n"
               "  set-location NAME      Set location for host\n"
               , program_invocation_short_name);
}

static int parse_argv(int argc, char *argv[]) {

        enum {
                ARG_VERSION = 0x100,
                ARG_NO_ASK_PASSWORD,
                ARG_TRANSIENT,
                ARG_STATIC,
                ARG_PRETTY
        };

        static const struct option options[] = {
                { "help",            no_argument,       NULL, 'h'                 },
                { "version",         no_argument,       NULL, ARG_VERSION         },
                { "transient",       no_argument,       NULL, ARG_TRANSIENT       },
                { "static",          no_argument,       NULL, ARG_STATIC          },
                { "pretty",          no_argument,       NULL, ARG_PRETTY          },
                { "host",            required_argument, NULL, 'H'                 },
                { "machine",         required_argument, NULL, 'M'                 },
                { "no-ask-password", no_argument,       NULL, ARG_NO_ASK_PASSWORD },
                {}
        };

        int c;

        assert(argc >= 0);
        assert(argv);

        while ((c = getopt_long(argc, argv, "hH:M:", options, NULL)) >= 0)

                switch (c) {

                case 'h':
                        help();
                        return 0;

                case ARG_VERSION:
                        return version();

                case 'H':
                        arg_transport = BUS_TRANSPORT_REMOTE;
                        arg_host = optarg;
                        break;

                case 'M':
                        arg_transport = BUS_TRANSPORT_MACHINE;
                        arg_host = optarg;
                        break;

                case ARG_TRANSIENT:
                        arg_transient = true;
                        break;

                case ARG_PRETTY:
                        arg_pretty = true;
                        break;

                case ARG_STATIC:
                        arg_static = true;
                        break;

                case ARG_NO_ASK_PASSWORD:
                        arg_ask_password = false;
                        break;

                case '?':
                        return -EINVAL;

                default:
                        assert_not_reached("Unhandled option");
                }

        return 1;
}

static int hostnamectl_main(sd_bus *bus, int argc, char *argv[]) {

        static const struct {
                const char* verb;
                const enum {
                        MORE,
                        LESS,
                        EQUAL
                } argc_cmp;
                const int argc;
                int (* const dispatch)(sd_bus *bus, char **args, unsigned n);
        } verbs[] = {
                { "status",           LESS,  1, show_status    },
                { "set-hostname",     EQUAL, 2, set_hostname   },
                { "set-icon-name",    EQUAL, 2, set_icon_name  },
                { "set-chassis",      EQUAL, 2, set_chassis    },
                { "set-deployment",   EQUAL, 2, set_deployment },
                { "set-location",     EQUAL, 2, set_location   },
        };

        int left;
        unsigned i;

        assert(argc >= 0);
        assert(argv);

        left = argc - optind;

        if (left <= 0)
                /* Special rule: no arguments means "status" */
                i = 0;
        else {
                if (streq(argv[optind], "help")) {
                        help();
                        return 0;
                }

                for (i = 0; i < ELEMENTSOF(verbs); i++)
                        if (streq(argv[optind], verbs[i].verb))
                                break;

                if (i >= ELEMENTSOF(verbs)) {
                        log_error("Unknown operation %s", argv[optind]);
                        return -EINVAL;
                }
        }

        switch (verbs[i].argc_cmp) {

        case EQUAL:
                if (left != verbs[i].argc) {
                        log_error("Invalid number of arguments.");
                        return -EINVAL;
                }

                break;

        case MORE:
                if (left < verbs[i].argc) {
                        log_error("Too few arguments.");
                        return -EINVAL;
                }

                break;

        case LESS:
                if (left > verbs[i].argc) {
                        log_error("Too many arguments.");
                        return -EINVAL;
                }

                break;

        default:
                assert_not_reached("Unknown comparison operator.");
        }

        return verbs[i].dispatch(bus, argv + optind, left);
}

int main(int argc, char *argv[]) {
        _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
        int r;

        setlocale(LC_ALL, "");
        log_parse_environment();
        log_open();

        r = parse_argv(argc, argv);
        if (r <= 0)
                goto finish;

        r = bus_connect_transport(arg_transport, arg_host, false, &bus);
        if (r < 0) {
                log_error_errno(r, "Failed to create bus connection: %m");
                goto finish;
        }

        r = hostnamectl_main(bus, argc, argv);

finish:
        return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}
Commit	Line	Data
dbc4fbae LP	1	/***
	2	This file is part of systemd.
	3
	4	Copyright 2012 Lennart Poettering
	5
	6	systemd is free software; you can redistribute it and/or modify it
	7	under the terms of the GNU Lesser General Public License as published by
	8	the Free Software Foundation; either version 2.1 of the License, or
	9	(at your option) any later version.
	10
	11	systemd is distributed in the hope that it will be useful, but
	12	WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	Lesser General Public License for more details.
	15
	16	You should have received a copy of the GNU Lesser General Public License
	17	along with systemd; If not, see <http://www.gnu.org/licenses/>.
	18	***/
	19
dbc4fbae	20	#include <getopt.h>
a9cdc94f	21	#include <locale.h>
3f6fd1ba LP	22	#include <stdbool.h>
3f6fd1ba LP	23	#include <stdlib.h>
dbc4fbae	24	#include <string.h>
dbc4fbae	25
b028f3e4	26	#include "sd-bus.h"
958b66ea	27	#include "sd-id128.h"
3f6fd1ba	28
b5efdb8a	29	#include "alloc-util.h"
3f6fd1ba	30	#include "architecture.h"
b028f3e4	31	#include "bus-error.h"
3f6fd1ba LP	32	#include "bus-util.h"
3f6fd1ba LP	33	#include "hostname-util.h"
dbc4fbae	34	#include "spawn-polkit-agent.h"
3f6fd1ba	35	#include "util.h"
dbc4fbae	36
dbc4fbae	37	static bool arg_ask_password = true;
b028f3e4	38	static BusTransport arg_transport = BUS_TRANSPORT_LOCAL;
7085053a	39	static char *arg_host = NULL;
960787ae ZJS	40	static bool arg_transient = false;
	41	static bool arg_pretty = false;
	42	static bool arg_static = false;
dbc4fbae	43
46e65dcc LP	44	static void polkit_agent_open_if_enabled(void) {
	45
	46	/* Open the polkit agent as a child process if necessary */
	47	if (!arg_ask_password)
	48	return;
	49
	50	if (arg_transport != BUS_TRANSPORT_LOCAL)
	51	return;
	52
	53	polkit_agent_open();
	54	}
	55
dbc4fbae	56	typedef struct StatusInfo {
b028f3e4 SP	57	char *hostname;
	58	char *static_hostname;
	59	char *pretty_hostname;
	60	char *icon_name;
	61	char *chassis;
799298d6	62	char *deployment;
41414fed	63	char *location;
fa4f8f9b DH	64	char *kernel_name;
fa4f8f9b DH	65	char *kernel_release;
3448456b DH	66	char *os_pretty_name;
3448456b DH	67	char *os_cpe_name;
e9a2e453 LP	68	char *virtualization;
e9a2e453 LP	69	char *architecture;
dbc4fbae LP	70	} StatusInfo;
	71
	72	static void print_status_info(StatusInfo *i) {
39883f62	73	sd_id128_t mid = {}, bid = {};
dbc4fbae	74	int r;
dbc4fbae LP	75
	76	assert(i);
	77
e9a2e453	78	printf(" Static hostname: %s\n", strna(i->static_hostname));
dbc4fbae	79
c0b21b96 LP	80	if (!isempty(i->pretty_hostname) &&
c0b21b96 LP	81	!streq_ptr(i->pretty_hostname, i->static_hostname))
e9a2e453	82	printf(" Pretty hostname: %s\n", i->pretty_hostname);
c0b21b96 LP	83
	84	if (!isempty(i->hostname) &&
	85	!streq_ptr(i->hostname, i->static_hostname))
e9a2e453	86	printf("Transient hostname: %s\n", i->hostname);
dbc4fbae	87
41414fed LP	88	if (!isempty(i->icon_name))
	89	printf(" Icon name: %s\n",
	90	strna(i->icon_name));
	91
	92	if (!isempty(i->chassis))
	93	printf(" Chassis: %s\n",
	94	strna(i->chassis));
	95
	96	if (!isempty(i->deployment))
	97	printf(" Deployment: %s\n", i->deployment);
	98
	99	if (!isempty(i->location))
	100	printf(" Location: %s\n", i->location);
dbc4fbae LP	101
	102	r = sd_id128_get_machine(&mid);
	103	if (r >= 0)
	104	printf(" Machine ID: " SD_ID128_FORMAT_STR "\n", SD_ID128_FORMAT_VAL(mid));
	105
	106	r = sd_id128_get_boot(&bid);
	107	if (r >= 0)
	108	printf(" Boot ID: " SD_ID128_FORMAT_STR "\n", SD_ID128_FORMAT_VAL(bid));
	109
e9a2e453 LP	110	if (!isempty(i->virtualization))
e9a2e453 LP	111	printf(" Virtualization: %s\n", i->virtualization);
fe29f9d2	112
3448456b DH	113	if (!isempty(i->os_pretty_name))
3448456b DH	114	printf(" Operating System: %s\n", i->os_pretty_name);
fe29f9d2	115
3448456b DH	116	if (!isempty(i->os_cpe_name))
3448456b DH	117	printf(" CPE OS Name: %s\n", i->os_cpe_name);
fe29f9d2	118
fa4f8f9b DH	119	if (!isempty(i->kernel_name) && !isempty(i->kernel_release))
fa4f8f9b DH	120	printf(" Kernel: %s %s\n", i->kernel_name, i->kernel_release);
e9a2e453 LP	121
	122	if (!isempty(i->architecture))
	123	printf(" Architecture: %s\n", i->architecture);
fe29f9d2	124
dbc4fbae LP	125	}
dbc4fbae LP	126
b028f3e4	127	static int show_one_name(sd_bus bus, const char attr) {
4afd3348 LP	128	_cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
4afd3348 LP	129	_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
b028f3e4	130	const char *s;
960787ae ZJS	131	int r;
960787ae ZJS	132
b028f3e4	133	r = sd_bus_get_property(
960787ae ZJS	134	bus,
	135	"org.freedesktop.hostname1",
	136	"/org/freedesktop/hostname1",
b028f3e4 SP	137	"org.freedesktop.hostname1",
	138	attr,
	139	&error, &reply, "s");
	140	if (r < 0) {
	141	log_error("Could not get property: %s", bus_error_message(&error, -r));
960787ae	142	return r;
960787ae ZJS	143	}
960787ae ZJS	144
b028f3e4 SP	145	r = sd_bus_message_read(reply, "s", &s);
b028f3e4 SP	146	if (r < 0)
5b30bef8	147	return bus_log_parse_error(r);
960787ae	148
960787ae ZJS	149	printf("%s\n", s);
	150
	151	return 0;
	152	}
	153
b028f3e4	154	static int show_all_names(sd_bus *bus) {
b92bea5d	155	StatusInfo info = {};
e9a2e453 LP	156
e9a2e453 LP	157	static const struct bus_properties_map hostname_map[] = {
41414fed LP	158	{ "Hostname", "s", NULL, offsetof(StatusInfo, hostname) },
	159	{ "StaticHostname", "s", NULL, offsetof(StatusInfo, static_hostname) },
	160	{ "PrettyHostname", "s", NULL, offsetof(StatusInfo, pretty_hostname) },
	161	{ "IconName", "s", NULL, offsetof(StatusInfo, icon_name) },
	162	{ "Chassis", "s", NULL, offsetof(StatusInfo, chassis) },
	163	{ "Deployment", "s", NULL, offsetof(StatusInfo, deployment) },
	164	{ "Location", "s", NULL, offsetof(StatusInfo, location) },
	165	{ "KernelName", "s", NULL, offsetof(StatusInfo, kernel_name) },
	166	{ "KernelRelease", "s", NULL, offsetof(StatusInfo, kernel_release) },
	167	{ "OperatingSystemPrettyName", "s", NULL, offsetof(StatusInfo, os_pretty_name) },
	168	{ "OperatingSystemCPEName", "s", NULL, offsetof(StatusInfo, os_cpe_name) },
b028f3e4 SP	169	{}
b028f3e4 SP	170	};
e9a2e453 LP	171
e9a2e453 LP	172	static const struct bus_properties_map manager_map[] = {
41414fed LP	173	{ "Virtualization", "s", NULL, offsetof(StatusInfo, virtualization) },
41414fed LP	174	{ "Architecture", "s", NULL, offsetof(StatusInfo, architecture) },
e9a2e453 LP	175	{}
	176	};
	177
b028f3e4	178	int r;
dbc4fbae	179
b028f3e4 SP	180	r = bus_map_all_properties(bus,
	181	"org.freedesktop.hostname1",
	182	"/org/freedesktop/hostname1",
e9a2e453	183	hostname_map,
9f6eb1cd	184	&info);
dbc4fbae	185	if (r < 0)
b028f3e4	186	goto fail;
dbc4fbae	187
e9a2e453 LP	188	bus_map_all_properties(bus,
	189	"org.freedesktop.systemd1",
	190	"/org/freedesktop/systemd1",
	191	manager_map,
	192	&info);
	193
dbc4fbae	194	print_status_info(&info);
b028f3e4 SP	195
	196	fail:
	197	free(info.hostname);
	198	free(info.static_hostname);
	199	free(info.pretty_hostname);
	200	free(info.icon_name);
	201	free(info.chassis);
799298d6	202	free(info.deployment);
41414fed	203	free(info.location);
fa4f8f9b DH	204	free(info.kernel_name);
fa4f8f9b DH	205	free(info.kernel_release);
3448456b DH	206	free(info.os_pretty_name);
3448456b DH	207	free(info.os_cpe_name);
e9a2e453 LP	208	free(info.virtualization);
	209	free(info.architecture);
	210
	211	return r;
dbc4fbae LP	212	}
dbc4fbae LP	213
b028f3e4	214	static int show_status(sd_bus bus, char *args, unsigned n) {
960787ae ZJS	215	assert(args);
	216
	217	if (arg_pretty \|\| arg_static \|\| arg_transient) {
	218	const char *attr;
	219
	220	if (!!arg_static + !!arg_pretty + !!arg_transient > 1) {
	221	log_error("Cannot query more than one name type at a time");
	222	return -EINVAL;
	223	}
	224
	225	attr = arg_pretty ? "PrettyHostname" :
	226	arg_static ? "StaticHostname" : "Hostname";
	227
	228	return show_one_name(bus, attr);
	229	} else
	230	return show_all_names(bus);
	231	}
	232
b028f3e4	233	static int set_simple_string(sd_bus bus, const char method, const char *value) {
4afd3348	234	_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
b028f3e4 SP	235	int r = 0;
b028f3e4 SP	236
46e65dcc	237	polkit_agent_open_if_enabled();
b028f3e4 SP	238
	239	r = sd_bus_call_method(
	240	bus,
	241	"org.freedesktop.hostname1",
	242	"/org/freedesktop/hostname1",
	243	"org.freedesktop.hostname1",
	244	method,
	245	&error, NULL,
	246	"sb", value, arg_ask_password);
	247	if (r < 0)
	248	log_error("Could not set property: %s", bus_error_message(&error, -r));
	249	return r;
	250	}
	251
	252	static int set_hostname(sd_bus bus, char *args, unsigned n) {
dbc4fbae	253	_cleanup_free_ char *h = NULL;
17eb9a9d	254	char *hostname = args[1];
dbc4fbae LP	255	int r;
	256
	257	assert(args);
	258	assert(n == 2);
	259
960787ae ZJS	260	if (!arg_pretty && !arg_static && !arg_transient)
	261	arg_pretty = arg_static = arg_transient = true;
	262
	263	if (arg_pretty) {
fda2c5d2 LP	264	const char *p;
	265
	266	/* If the passed hostname is already valid, then
	267	* assume the user doesn't know anything about pretty
	268	* hostnames, so let's unset the pretty hostname, and
	269	* just set the passed hostname as static/dynamic
	270	* hostname. */
	271
17eb9a9d	272	if (arg_static && hostname_is_valid(hostname, true)) {
fda2c5d2	273	p = "";
17eb9a9d	274	/* maybe get rid of trailing dot */
ae691c1d	275	hostname = hostname_cleanup(hostname);
17eb9a9d ZJS	276	} else {
	277	p = h = strdup(hostname);
	278	if (!p)
	279	return log_oom();
	280
ae691c1d	281	hostname_cleanup(hostname);
fda2c5d2 LP	282	}
fda2c5d2 LP	283
b028f3e4	284	r = set_simple_string(bus, "SetPrettyHostname", p);
dbc4fbae LP	285	if (r < 0)
dbc4fbae LP	286	return r;
dbc4fbae LP	287	}
dbc4fbae LP	288
960787ae	289	if (arg_static) {
b028f3e4	290	r = set_simple_string(bus, "SetStaticHostname", hostname);
dbc4fbae LP	291	if (r < 0)
	292	return r;
	293	}
	294
960787ae	295	if (arg_transient) {
b028f3e4	296	r = set_simple_string(bus, "SetHostname", hostname);
dbc4fbae LP	297	if (r < 0)
	298	return r;
	299	}
	300
	301	return 0;
	302	}
	303
b028f3e4	304	static int set_icon_name(sd_bus bus, char *args, unsigned n) {
dbc4fbae LP	305	assert(args);
	306	assert(n == 2);
	307
b028f3e4	308	return set_simple_string(bus, "SetIconName", args[1]);
dbc4fbae LP	309	}
dbc4fbae LP	310
b028f3e4	311	static int set_chassis(sd_bus bus, char *args, unsigned n) {
7871c8e9 LP	312	assert(args);
	313	assert(n == 2);
	314
f20c84c1	315	return set_simple_string(bus, "SetChassis", args[1]);
7871c8e9 LP	316	}
7871c8e9 LP	317
799298d6 JG	318	static int set_deployment(sd_bus bus, char *args, unsigned n) {
	319	assert(args);
	320	assert(n == 2);
	321
	322	return set_simple_string(bus, "SetDeployment", args[1]);
	323	}
	324
41414fed LP	325	static int set_location(sd_bus bus, char *args, unsigned n) {
	326	assert(args);
	327	assert(n == 2);
	328
	329	return set_simple_string(bus, "SetLocation", args[1]);
	330	}
	331
601185b4	332	static void help(void) {
7591abd4 LP	333	printf("%s [OPTIONS...] COMMAND ...\n\n"
7591abd4 LP	334	"Query or change system hostname.\n\n"
dbc4fbae LP	335	" -h --help Show this help\n"
dbc4fbae LP	336	" --version Show package version\n"
7591abd4	337	" --no-ask-password Do not prompt for password\n"
b028f3e4	338	" -H --host=[USER@]HOST Operate on remote host\n"
a86a47ce LP	339	" -M --machine=CONTAINER Operate on local container\n"
	340	" --transient Only set transient hostname\n"
	341	" --static Only set static hostname\n"
	342	" --pretty Only set pretty hostname\n\n"
dbc4fbae	343	"Commands:\n"
7591abd4 LP	344	" status Show current hostname settings\n"
7591abd4 LP	345	" set-hostname NAME Set system hostname\n"
7871c8e9	346	" set-icon-name NAME Set icon name for host\n"
799298d6	347	" set-chassis NAME Set chassis type for host\n"
601185b4	348	" set-deployment NAME Set deployment environment for host\n"
41414fed	349	" set-location NAME Set location for host\n"
601185b4	350	, program_invocation_short_name);
dbc4fbae LP	351	}
	352
	353	static int parse_argv(int argc, char *argv[]) {
	354
	355	enum {
	356	ARG_VERSION = 0x100,
	357	ARG_NO_ASK_PASSWORD,
960787ae ZJS	358	ARG_TRANSIENT,
	359	ARG_STATIC,
	360	ARG_PRETTY
dbc4fbae LP	361	};
	362
	363	static const struct option options[] = {
	364	{ "help", no_argument, NULL, 'h' },
	365	{ "version", no_argument, NULL, ARG_VERSION },
eb9da376 LP	366	{ "transient", no_argument, NULL, ARG_TRANSIENT },
	367	{ "static", no_argument, NULL, ARG_STATIC },
	368	{ "pretty", no_argument, NULL, ARG_PRETTY },
dbc4fbae	369	{ "host", required_argument, NULL, 'H' },
b028f3e4	370	{ "machine", required_argument, NULL, 'M' },
dbc4fbae	371	{ "no-ask-password", no_argument, NULL, ARG_NO_ASK_PASSWORD },
eb9da376	372	{}
dbc4fbae LP	373	};
	374
	375	int c;
	376
	377	assert(argc >= 0);
	378	assert(argv);
	379
601185b4	380	while ((c = getopt_long(argc, argv, "hH:M:", options, NULL)) >= 0)
dbc4fbae LP	381
	382	switch (c) {
	383
	384	case 'h':
601185b4 ZJS	385	help();
601185b4 ZJS	386	return 0;
dbc4fbae LP	387
dbc4fbae LP	388	case ARG_VERSION:
3f6fd1ba	389	return version();
dbc4fbae	390
b028f3e4 SP	391	case 'H':
	392	arg_transport = BUS_TRANSPORT_REMOTE;
	393	arg_host = optarg;
dbc4fbae LP	394	break;
dbc4fbae LP	395
b028f3e4	396	case 'M':
de33fc62	397	arg_transport = BUS_TRANSPORT_MACHINE;
b028f3e4	398	arg_host = optarg;
dbc4fbae LP	399	break;
dbc4fbae LP	400
960787ae ZJS	401	case ARG_TRANSIENT:
960787ae ZJS	402	arg_transient = true;
dbc4fbae LP	403	break;
dbc4fbae LP	404
960787ae ZJS	405	case ARG_PRETTY:
960787ae ZJS	406	arg_pretty = true;
dbc4fbae LP	407	break;
dbc4fbae LP	408
960787ae ZJS	409	case ARG_STATIC:
960787ae ZJS	410	arg_static = true;
dbc4fbae LP	411	break;
dbc4fbae LP	412
59f432ea LP	413	case ARG_NO_ASK_PASSWORD:
	414	arg_ask_password = false;
	415	break;
	416
dbc4fbae LP	417	case '?':
	418	return -EINVAL;
	419
	420	default:
eb9da376	421	assert_not_reached("Unhandled option");
dbc4fbae	422	}
dbc4fbae	423
dbc4fbae LP	424	return 1;
	425	}
	426
b028f3e4	427	static int hostnamectl_main(sd_bus bus, int argc, char argv[]) {
dbc4fbae LP	428
	429	static const struct {
	430	const char* verb;
	431	const enum {
	432	MORE,
	433	LESS,
	434	EQUAL
	435	} argc_cmp;
	436	const int argc;
b028f3e4	437	int (* const dispatch)(sd_bus bus, char *args, unsigned n);
dbc4fbae	438	} verbs[] = {
41414fed LP	439	{ "status", LESS, 1, show_status },
	440	{ "set-hostname", EQUAL, 2, set_hostname },
	441	{ "set-icon-name", EQUAL, 2, set_icon_name },
	442	{ "set-chassis", EQUAL, 2, set_chassis },
	443	{ "set-deployment", EQUAL, 2, set_deployment },
	444	{ "set-location", EQUAL, 2, set_location },
dbc4fbae LP	445	};
	446
	447	int left;
	448	unsigned i;
	449
	450	assert(argc >= 0);
	451	assert(argv);
dbc4fbae LP	452
	453	left = argc - optind;
	454
	455	if (left <= 0)
	456	/* Special rule: no arguments means "status" */
	457	i = 0;
	458	else {
	459	if (streq(argv[optind], "help")) {
	460	help();
	461	return 0;
	462	}
	463
	464	for (i = 0; i < ELEMENTSOF(verbs); i++)
	465	if (streq(argv[optind], verbs[i].verb))
	466	break;
	467
	468	if (i >= ELEMENTSOF(verbs)) {
	469	log_error("Unknown operation %s", argv[optind]);
	470	return -EINVAL;
	471	}
	472	}
	473
	474	switch (verbs[i].argc_cmp) {
	475
	476	case EQUAL:
	477	if (left != verbs[i].argc) {
	478	log_error("Invalid number of arguments.");
	479	return -EINVAL;
	480	}
	481
	482	break;
	483
	484	case MORE:
	485	if (left < verbs[i].argc) {
	486	log_error("Too few arguments.");
	487	return -EINVAL;
	488	}
	489
	490	break;
	491
	492	case LESS:
	493	if (left > verbs[i].argc) {
	494	log_error("Too many arguments.");
	495	return -EINVAL;
	496	}
	497
	498	break;
	499
	500	default:
	501	assert_not_reached("Unknown comparison operator.");
	502	}
	503
dbc4fbae LP	504	return verbs[i].dispatch(bus, argv + optind, left);
	505	}
	506
	507	int main(int argc, char *argv[]) {
4afd3348	508	_cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
84f6181c	509	int r;
dbc4fbae	510
a9cdc94f	511	setlocale(LC_ALL, "");
dbc4fbae LP	512	log_parse_environment();
	513	log_open();
	514
	515	r = parse_argv(argc, argv);
b028f3e4	516	if (r <= 0)
dbc4fbae	517	goto finish;
b028f3e4	518
266f3e26	519	r = bus_connect_transport(arg_transport, arg_host, false, &bus);
b028f3e4	520	if (r < 0) {
da927ba9	521	log_error_errno(r, "Failed to create bus connection: %m");
dbc4fbae LP	522	goto finish;
	523	}
	524
b028f3e4	525	r = hostnamectl_main(bus, argc, argv);
dbc4fbae LP	526
dbc4fbae LP	527	finish:
5567fafb	528	return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
dbc4fbae	529	}