/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
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 .
***/
#include
#include
#include
#include
#include
#include "sd-bus.h"
#include "sd-id128.h"
#include "hostname-util.h"
#include "bus-util.h"
#include "bus-error.h"
#include "util.h"
#include "spawn-polkit-agent.h"
#include "build.h"
#include "architecture.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_bus_message_unref_ sd_bus_message *reply = NULL;
_cleanup_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_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, false);
} else {
p = h = strdup(hostname);
if (!p)
return log_oom();
hostname_cleanup(hostname, false);
}
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:
puts(PACKAGE_STRING);
puts(SYSTEMD_FEATURES);
return 0;
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_bus_flush_close_unref_ 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_open_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;
}