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Systemd/src/hostname/hostnamectl.c

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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#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-map-properties.h"
#include "hostname-util.h"
#include "main-func.h"
#include "pretty-print.h"
#include "spawn-polkit-agent.h"
#include "terminal-util.h"
#include "util.h"
#include "verbs.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;
typedef struct StatusInfo {
const char *hostname;
const char *static_hostname;
const char *pretty_hostname;
const char *icon_name;
const char *chassis;
const char *deployment;
const char *location;
const char *kernel_name;
const char *kernel_release;
const char *os_pretty_name;
const char *os_cpe_name;
const char *virtualization;
const char *architecture;
const char *home_url;
const char *hardware_vendor;
const char *hardware_model;
} 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)) {
_cleanup_free_ char *formatted = NULL;
const char *t = i->os_pretty_name;
if (i->home_url) {
if (terminal_urlify(i->home_url, i->os_pretty_name, &formatted) >= 0)
t = formatted;
}
printf(" Operating System: %s\n", t);
}
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);
if (!isempty(i->hardware_vendor))
printf(" Hardware Vendor: %s\n", i->hardware_vendor);
if (!isempty(i->hardware_model))
printf(" Hardware Model: %s\n", i->hardware_model);
}
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)
return log_error_errno(r, "Could not get property: %s", bus_error_message(&error, 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, sd_bus_error *error) {
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) },
{ "HomeURL", "s", NULL, offsetof(StatusInfo, home_url) },
{ "HardwareVendor", "s", NULL, offsetof(StatusInfo, hardware_vendor) },
{ "HardwareModel", "s", NULL, offsetof(StatusInfo, hardware_model) },
{}
};
static const struct bus_properties_map manager_map[] = {
{ "Virtualization", "s", NULL, offsetof(StatusInfo, virtualization) },
{ "Architecture", "s", NULL, offsetof(StatusInfo, architecture) },
{}
};
_cleanup_(sd_bus_message_unrefp) sd_bus_message *host_message = NULL, *manager_message = NULL;
int r;
r = bus_map_all_properties(bus,
"org.freedesktop.hostname1",
"/org/freedesktop/hostname1",
hostname_map,
0,
error,
&host_message,
&info);
if (r < 0)
return r;
r = bus_map_all_properties(bus,
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
manager_map,
0,
error,
&manager_message,
&info);
print_status_info(&info);
return r;
}
static int show_status(int argc, char **argv, void *userdata) {
sd_bus *bus = userdata;
int r;
if (arg_pretty || arg_static || arg_transient) {
const char *attr;
if (!!arg_static + !!arg_pretty + !!arg_transient > 1)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"Cannot query more than one name type at a time");
attr = arg_pretty ? "PrettyHostname" :
arg_static ? "StaticHostname" : "Hostname";
return show_one_name(bus, attr);
} else {
_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
r = show_all_names(bus, &error);
if (r < 0)
return log_error_errno(r, "Failed to query system properties: %s", bus_error_message(&error, r));
return 0;
}
}
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(arg_transport, arg_ask_password);
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)
return log_error_errno(r, "Could not set property: %s", bus_error_message(&error, r));
return 0;
}
static int set_hostname(int argc, char **argv, void *userdata) {
_cleanup_free_ char *h = NULL;
const char *hostname = argv[1];
sd_bus *bus = userdata;
int r;
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, VALID_HOSTNAME_TRAILING_DOT))
p = ""; /* No pretty hostname (as it is redundant), just a static one */
else
p = hostname; /* Use the passed name as pretty hostname */
r = set_simple_string(bus, "SetPrettyHostname", p);
if (r < 0)
return r;
/* Now that we set the pretty hostname, let's clean up the parameter and use that as static
* hostname. If the hostname was already valid as static hostname, this will only chop off the trailing
* dot if there is one. If it was not valid, then it will be made fully valid by truncating, dropping
* multiple dots, and dropping weird chars. Note that we clean the name up only if we also are
* supposed to set the pretty name. If the pretty name is not being set we assume the user knows what
* he does and pass the name as-is. */
h = strdup(hostname);
if (!h)
return log_oom();
hostname = hostname_cleanup(h); /* Use the cleaned up name as static hostname */
}
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(int argc, char **argv, void *userdata) {
return set_simple_string(userdata, "SetIconName", argv[1]);
}
static int set_chassis(int argc, char **argv, void *userdata) {
return set_simple_string(userdata, "SetChassis", argv[1]);
}
static int set_deployment(int argc, char **argv, void *userdata) {
return set_simple_string(userdata, "SetDeployment", argv[1]);
}
static int set_location(int argc, char **argv, void *userdata) {
return set_simple_string(userdata, "SetLocation", argv[1]);
}
static int help(void) {
_cleanup_free_ char *link = NULL;
int r;
r = terminal_urlify_man("hostnamectl", "1", &link);
if (r < 0)
return log_oom();
printf("%s [OPTIONS...] COMMAND ...\n\n"
"%sQuery or change system hostname.%s\n"
"\nCommands:\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"
"\nOptions:\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"
"\nSee the %s for details.\n"
, program_invocation_short_name
, ansi_highlight()
, ansi_normal()
, link
);
return 0;
}
static int verb_help(int argc, char **argv, void *userdata) {
return help();
}
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':
return help();
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 Verb verbs[] = {
{ "status", VERB_ANY, 1, VERB_DEFAULT, show_status },
{ "set-hostname", 2, 2, 0, set_hostname },
{ "set-icon-name", 2, 2, 0, set_icon_name },
{ "set-chassis", 2, 2, 0, set_chassis },
{ "set-deployment", 2, 2, 0, set_deployment },
{ "set-location", 2, 2, 0, set_location },
{ "help", VERB_ANY, VERB_ANY, 0, verb_help }, /* Not documented, but supported since it is created. */
{}
};
return dispatch_verb(argc, argv, verbs, bus);
}
static int run(int argc, char *argv[]) {
_cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
int r;
setlocale(LC_ALL, "");
log_setup_cli();
r = parse_argv(argc, argv);
if (r <= 0)
return r;
r = bus_connect_transport(arg_transport, arg_host, false, &bus);
if (r < 0)
return bus_log_connect_error(r);
return hostnamectl_main(bus, argc, argv);
}
DEFINE_MAIN_FUNCTION(run);
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