/* SPDX-License-Identifier: LGPL-2.1-or-later */ #include #include #include #include #include #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);