diff options
Diffstat (limited to '')
-rw-r--r-- | src/hostname/hostnamectl.c | 708 |
1 files changed, 708 insertions, 0 deletions
diff --git a/src/hostname/hostnamectl.c b/src/hostname/hostnamectl.c new file mode 100644 index 0000000..d7f7729 --- /dev/null +++ b/src/hostname/hostnamectl.c @@ -0,0 +1,708 @@ +/* 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; + const char *firmware_version; + sd_id128_t machine_id; + sd_id128_t boot_id; +} StatusInfo; + +static const char* chassis_string_to_glyph(const char *chassis) { + if (streq_ptr(chassis, "laptop")) + return u8"💻"; /* Personal Computer */ + if (streq_ptr(chassis, "desktop")) + return u8"🖥️"; /* Desktop Computer */ + if (streq_ptr(chassis, "server")) + return u8"🖳"; /* Old Personal Computer */ + if (streq_ptr(chassis, "tablet")) + return u8"具"; /* Ideograph tool, implement; draw up, write, looks vaguely tabletty */ + if (streq_ptr(chassis, "watch")) + return u8"⌚"; /* Watch */ + if (streq_ptr(chassis, "handset")) + return u8"🕻"; /* Left Hand Telephone Receiver */ + if (streq_ptr(chassis, "vm")) + return u8"🖴"; /* Hard disk */ + if (streq_ptr(chassis, "container")) + return u8"☐"; /* Ballot Box */ + return NULL; +} + +static int print_status_info(StatusInfo *i) { + _cleanup_(table_unrefp) Table *table = NULL; + 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); + + table_set_ersatz_string(table, TABLE_ERSATZ_UNSET); + + 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)) { + /* Possibly add a pretty symbol. Let's not bother with non-unicode fallbacks, because this is + * just a prettification and we can't really express this with ASCII anyway. */ + const char *v = chassis_string_to_glyph(i->chassis); + if (v) + v = strjoina(i->chassis, " ", v); + + r = table_add_many(table, + TABLE_STRING, "Chassis:", + TABLE_STRING, v ?: 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); + } + + if (!sd_id128_is_null(i->machine_id)) { + r = table_add_many(table, + TABLE_STRING, "Machine ID:", + TABLE_ID128, i->machine_id); + if (r < 0) + return table_log_add_error(r); + } + + if (!sd_id128_is_null(i->boot_id)) { + r = table_add_many(table, + TABLE_STRING, "Boot ID:", + TABLE_ID128, i->boot_id); + 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); + } + + if (!isempty(i->firmware_version)) { + r = table_add_many(table, + TABLE_STRING, "Firmware Version:", + TABLE_STRING, i->firmware_version); + 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) }, + { "FirmwareVersion", "s", NULL, offsetof(StatusInfo, firmware_version) }, + {} + }; + + 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)); + + if (!arg_host) { + if (sd_id128_is_null(info.machine_id)) + (void) sd_id128_get_machine(&info.machine_id); + if (sd_id128_is_null(info.boot_id)) + (void) sd_id128_get_boot(&info.boot_id); + } + + 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(); + } + + 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, arg_transport); + + return hostnamectl_main(bus, argc, argv); +} + +DEFINE_MAIN_FUNCTION(run); |