| /* 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-common-errors.h" |
| #include "bus-error.h" |
| #include "bus-map-properties.h" |
| #include "format-table.h" |
| #include "hostname-setup.h" |
| #include "hostname-util.h" |
| #include "json.h" |
| #include "main-func.h" |
| #include "parse-argument.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; |
| static JsonFormatFlags arg_json_format_flags = JSON_FORMAT_OFF; |
| |
| 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 int print_status_info(StatusInfo *i) { |
| _cleanup_(table_unrefp) Table *table = NULL; |
| sd_id128_t mid = {}, bid = {}; |
| TableCell *cell; |
| int r; |
| |
| assert(i); |
| |
| table = table_new("key", "value"); |
| if (!table) |
| return log_oom(); |
| |
| assert_se(cell = table_get_cell(table, 0, 0)); |
| (void) table_set_ellipsize_percent(table, cell, 100); |
| (void) table_set_align_percent(table, cell, 100); |
| |
| table_set_header(table, false); |
| |
| r = table_set_empty_string(table, "n/a"); |
| if (r < 0) |
| return log_oom(); |
| |
| r = table_add_many(table, |
| TABLE_STRING, "Static hostname:", |
| TABLE_STRING, i->static_hostname); |
| if (r < 0) |
| return table_log_add_error(r); |
| |
| if (!isempty(i->pretty_hostname) && |
| !streq_ptr(i->pretty_hostname, i->static_hostname)) { |
| r = table_add_many(table, |
| TABLE_STRING, "Pretty hostname:", |
| TABLE_STRING, i->pretty_hostname); |
| if (r < 0) |
| return table_log_add_error(r); |
| } |
| |
| if (!isempty(i->hostname) && |
| !streq_ptr(i->hostname, i->static_hostname)) { |
| r = table_add_many(table, |
| TABLE_STRING, "Transient hostname:", |
| TABLE_STRING, i->hostname); |
| if (r < 0) |
| return table_log_add_error(r); |
| } |
| |
| if (!isempty(i->icon_name)) { |
| r = table_add_many(table, |
| TABLE_STRING, "Icon name:", |
| TABLE_STRING, i->icon_name); |
| if (r < 0) |
| return table_log_add_error(r); |
| } |
| |
| if (!isempty(i->chassis)) { |
| r = table_add_many(table, |
| TABLE_STRING, "Chassis:", |
| TABLE_STRING, i->chassis); |
| if (r < 0) |
| return table_log_add_error(r); |
| } |
| |
| if (!isempty(i->deployment)) { |
| r = table_add_many(table, |
| TABLE_STRING, "Deployment:", |
| TABLE_STRING, i->deployment); |
| if (r < 0) |
| return table_log_add_error(r); |
| } |
| |
| if (!isempty(i->location)) { |
| r = table_add_many(table, |
| TABLE_STRING, "Location:", |
| TABLE_STRING, i->location); |
| if (r < 0) |
| return table_log_add_error(r); |
| } |
| |
| r = sd_id128_get_machine(&mid); |
| if (r >= 0) { |
| r = table_add_many(table, |
| TABLE_STRING, "Machine ID:", |
| TABLE_ID128, mid); |
| if (r < 0) |
| return table_log_add_error(r); |
| } |
| |
| r = sd_id128_get_boot(&bid); |
| if (r >= 0) { |
| r = table_add_many(table, |
| TABLE_STRING, "Boot ID:", |
| TABLE_ID128, bid); |
| if (r < 0) |
| return table_log_add_error(r); |
| } |
| |
| if (!isempty(i->virtualization)) { |
| r = table_add_many(table, |
| TABLE_STRING, "Virtualization:", |
| TABLE_STRING, i->virtualization); |
| if (r < 0) |
| return table_log_add_error(r); |
| } |
| |
| if (!isempty(i->os_pretty_name)) { |
| r = table_add_many(table, |
| TABLE_STRING, "Operating System:", |
| TABLE_STRING, i->os_pretty_name, |
| TABLE_SET_URL, i->home_url); |
| if (r < 0) |
| return table_log_add_error(r); |
| } |
| |
| if (!isempty(i->os_cpe_name)) { |
| r = table_add_many(table, |
| TABLE_STRING, "CPE OS Name:", |
| TABLE_STRING, i->os_cpe_name); |
| if (r < 0) |
| return table_log_add_error(r); |
| } |
| |
| if (!isempty(i->kernel_name) && !isempty(i->kernel_release)) { |
| const char *v; |
| |
| v = strjoina(i->kernel_name, " ", i->kernel_release); |
| r = table_add_many(table, |
| TABLE_STRING, "Kernel:", |
| TABLE_STRING, v); |
| if (r < 0) |
| return table_log_add_error(r); |
| } |
| |
| if (!isempty(i->architecture)) { |
| r = table_add_many(table, |
| TABLE_STRING, "Architecture:", |
| TABLE_STRING, i->architecture); |
| if (r < 0) |
| return table_log_add_error(r); |
| } |
| |
| if (!isempty(i->hardware_vendor)) { |
| r = table_add_many(table, |
| TABLE_STRING, "Hardware Vendor:", |
| TABLE_STRING, i->hardware_vendor); |
| if (r < 0) |
| return table_log_add_error(r); |
| } |
| |
| if (!isempty(i->hardware_model)) { |
| r = table_add_many(table, |
| TABLE_STRING, "Hardware Model:", |
| TABLE_STRING, i->hardware_model); |
| if (r < 0) |
| return table_log_add_error(r); |
| } |
| |
| r = table_print(table, NULL); |
| if (r < 0) |
| return table_log_print_error(r); |
| |
| return 0; |
| } |
| |
| static int get_one_name(sd_bus *bus, const char* attr, char **ret) { |
| _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; |
| |
| assert(bus); |
| assert(attr); |
| |
| /* This obtains one string property, and copy it if 'ret' is set, or print it otherwise. */ |
| |
| 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); |
| |
| if (ret) { |
| char *str; |
| |
| str = strdup(s); |
| if (!str) |
| return log_oom(); |
| |
| *ret = str; |
| } else |
| 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) }, |
| { "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; |
| _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_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 log_error_errno(r, "Failed to query system properties: %s", bus_error_message(&error, r)); |
| |
| r = bus_map_all_properties(bus, |
| "org.freedesktop.systemd1", |
| "/org/freedesktop/systemd1", |
| manager_map, |
| 0, |
| &error, |
| &manager_message, |
| &info); |
| if (r < 0) |
| return log_error_errno(r, "Failed to query system properties: %s", bus_error_message(&error, r)); |
| |
| return print_status_info(&info); |
| } |
| |
| static int get_hostname_based_on_flag(sd_bus *bus) { |
| 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 get_one_name(bus, attr, NULL); |
| } |
| |
| static int show_status(int argc, char **argv, void *userdata) { |
| sd_bus *bus = userdata; |
| int r; |
| |
| if (arg_json_format_flags != JSON_FORMAT_OFF) { |
| _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
| _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; |
| _cleanup_(json_variant_unrefp) JsonVariant *v = NULL; |
| const char *text = NULL; |
| |
| r = sd_bus_call_method( |
| bus, |
| "org.freedesktop.hostname1", |
| "/org/freedesktop/hostname1", |
| "org.freedesktop.hostname1", |
| "Describe", |
| &error, |
| &reply, |
| NULL); |
| if (r < 0) |
| return log_error_errno(r, "Could not get description: %s", bus_error_message(&error, r)); |
| |
| r = sd_bus_message_read(reply, "s", &text); |
| if (r < 0) |
| return bus_log_parse_error(r); |
| |
| r = json_parse(text, 0, &v, NULL, NULL); |
| if (r < 0) |
| return log_error_errno(r, "Failed to parse JSON: %m"); |
| |
| json_variant_dump(v, arg_json_format_flags, NULL, NULL); |
| return 0; |
| } |
| |
| if (arg_pretty || arg_static || arg_transient) |
| return get_hostname_based_on_flag(bus); |
| |
| return show_all_names(bus); |
| } |
| |
| |
| static int set_simple_string_internal(sd_bus *bus, sd_bus_error *error, const char *target, const char *method, const char *value) { |
| _cleanup_(sd_bus_error_free) sd_bus_error e = SD_BUS_ERROR_NULL; |
| int r; |
| |
| polkit_agent_open_if_enabled(arg_transport, arg_ask_password); |
| |
| if (!error) |
| error = &e; |
| |
| 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 %s: %s", target, bus_error_message(error, r)); |
| |
| return 0; |
| } |
| |
| static int set_simple_string(sd_bus *bus, const char *target, const char *method, const char *value) { |
| return set_simple_string_internal(bus, NULL, target, method, value); |
| } |
| |
| static int set_hostname(int argc, char **argv, void *userdata) { |
| _cleanup_free_ char *h = NULL; |
| const char *hostname = argv[1]; |
| sd_bus *bus = userdata; |
| bool implicit = false, show_hint = false; |
| int r, ret = 0; |
| |
| if (!arg_pretty && !arg_static && !arg_transient) |
| arg_pretty = arg_static = arg_transient = implicit = true; |
| |
| if (!implicit && !arg_static && arg_transient) { |
| _cleanup_free_ char *source = NULL; |
| |
| r = get_one_name(bus, "HostnameSource", &source); |
| if (r < 0) |
| return r; |
| |
| if (hostname_source_from_string(source) == HOSTNAME_STATIC) |
| log_info("Hint: static hostname is already set, so the specified transient hostname will not be used."); |
| } |
| |
| if (arg_pretty) { |
| _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
| 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 (implicit && 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_internal(bus, &error, "pretty hostname", "SetPrettyHostname", p); |
| if (r < 0) { |
| if (implicit && |
| sd_bus_error_has_names(&error, |
| BUS_ERROR_FILE_IS_PROTECTED, |
| BUS_ERROR_READ_ONLY_FILESYSTEM)) { |
| show_hint = true; |
| ret = r; |
| } else |
| 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 |
| * they are doing 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) { |
| _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
| |
| r = set_simple_string_internal(bus, &error, "static hostname", "SetStaticHostname", hostname); |
| if (r < 0) { |
| if (implicit && |
| sd_bus_error_has_names(&error, |
| BUS_ERROR_FILE_IS_PROTECTED, |
| BUS_ERROR_READ_ONLY_FILESYSTEM)) { |
| show_hint = true; |
| ret = r; |
| } else |
| return r; |
| } |
| } |
| |
| if (arg_transient) { |
| r = set_simple_string(bus, "transient hostname", "SetHostname", hostname); |
| if (r < 0) |
| return r; |
| } |
| |
| if (show_hint) |
| log_info("Hint: use --transient option when /etc/machine-info or /etc/hostname cannot be modified (e.g. located in read-only filesystem)."); |
| |
| return ret; |
| } |
| |
| static int get_or_set_hostname(int argc, char **argv, void *userdata) { |
| return argc == 1 ? get_hostname_based_on_flag(userdata) : |
| set_hostname(argc, argv, userdata); |
| } |
| |
| static int get_or_set_icon_name(int argc, char **argv, void *userdata) { |
| return argc == 1 ? get_one_name(userdata, "IconName", NULL) : |
| set_simple_string(userdata, "icon", "SetIconName", argv[1]); |
| } |
| |
| static int get_or_set_chassis(int argc, char **argv, void *userdata) { |
| return argc == 1 ? get_one_name(userdata, "Chassis", NULL) : |
| set_simple_string(userdata, "chassis", "SetChassis", argv[1]); |
| } |
| |
| static int get_or_set_deployment(int argc, char **argv, void *userdata) { |
| return argc == 1 ? get_one_name(userdata, "Deployment", NULL) : |
| set_simple_string(userdata, "deployment", "SetDeployment", argv[1]); |
| } |
| |
| static int get_or_set_location(int argc, char **argv, void *userdata) { |
| return argc == 1 ? get_one_name(userdata, "Location", NULL) : |
| set_simple_string(userdata, "location", "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" |
| " hostname [NAME] Get/set system hostname\n" |
| " icon-name [NAME] Get/set icon name for host\n" |
| " chassis [NAME] Get/set chassis type for host\n" |
| " deployment [NAME] Get/set deployment environment for host\n" |
| " location [NAME] Get/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" |
| " --json=pretty|short|off\n" |
| " Generate JSON output\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, |
| ARG_JSON, |
| }; |
| |
| 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 }, |
| { "json", required_argument, NULL, ARG_JSON }, |
| {} |
| }; |
| |
| int c, r; |
| |
| 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 ARG_JSON: |
| r = parse_json_argument(optarg, &arg_json_format_flags); |
| if (r <= 0) |
| return r; |
| |
| 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 }, |
| { "hostname", VERB_ANY, 2, 0, get_or_set_hostname }, |
| { "set-hostname", 2, 2, 0, get_or_set_hostname }, /* obsolete */ |
| { "icon-name", VERB_ANY, 2, 0, get_or_set_icon_name }, |
| { "set-icon-name", 2, 2, 0, get_or_set_icon_name }, /* obsolete */ |
| { "chassis", VERB_ANY, 2, 0, get_or_set_chassis }, |
| { "set-chassis", 2, 2, 0, get_or_set_chassis }, /* obsolete */ |
| { "deployment", VERB_ANY, 2, 0, get_or_set_deployment }, |
| { "set-deployment", 2, 2, 0, get_or_set_deployment }, /* obsolete */ |
| { "location", VERB_ANY, 2, 0, get_or_set_location }, |
| { "set-location", 2, 2, 0, get_or_set_location }, /* obsolete */ |
| { "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(); |
| |
| 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); |