Adding upstream version 255.4.upstream/255.4

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

6 files changed, 2519 insertions, 0 deletions

diff --git a/src/hostname/hostnamectl.c b/src/hostname/hostnamectl.c
new file mode 100644
index 0000000..14fc160
--- /dev/null
+++ b/src/hostname/hostnamectl.c
@@ -0,0 +1,740 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <getopt.h>
+#include <locale.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "sd-bus.h"
+#include "sd-id128.h"
+
+#include "alloc-util.h"
+#include "architecture.h"
+#include "build.h"
+#include "bus-common-errors.h"
+#include "bus-error.h"
+#include "bus-locator.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 "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;
+        usec_t os_support_end;
+        const char *virtualization;
+        const char *architecture;
+        const char *home_url;
+        const char *hardware_vendor;
+        const char *hardware_model;
+        const char *firmware_version;
+        usec_t firmware_date;
+        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 const char *os_support_end_color(usec_t n, usec_t eol) {
+        usec_t left;
+
+        /* If the end of support is over, color output in red. If only a month is left, color output in
+         * yellow. If more than a year is left, color green. In between just show in regular color. */
+
+        if (n >= eol)
+                return ANSI_HIGHLIGHT_RED;
+        left = eol - n;
+        if (left < USEC_PER_MONTH)
+                return ANSI_HIGHLIGHT_YELLOW;
+        if (left > USEC_PER_YEAR)
+                return ANSI_HIGHLIGHT_GREEN;
+
+        return NULL;
+}
+
+static int print_status_info(StatusInfo *i) {
+        _cleanup_(table_unrefp) Table *table = NULL;
+        TableCell *cell;
+        int r;
+
+        assert(i);
+
+        table = table_new_vertical();
+        if (!table)
+                return log_oom();
+
+        assert_se(cell = table_get_cell(table, 0, 0));
+        (void) table_set_ellipsize_percent(table, cell, 100);
+
+        table_set_ersatz_string(table, TABLE_ERSATZ_UNSET);
+
+        r = table_add_many(table,
+                           TABLE_FIELD, "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_FIELD, "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_FIELD, "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_FIELD, "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_FIELD, "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_FIELD, "Deployment",
+                                   TABLE_STRING, i->deployment);
+                if (r < 0)
+                        return table_log_add_error(r);
+        }
+
+        if (!isempty(i->location)) {
+                r = table_add_many(table,
+                                   TABLE_FIELD, "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_FIELD, "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_FIELD, "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_FIELD, "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_FIELD, "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_FIELD, "CPE OS Name",
+                                   TABLE_STRING, i->os_cpe_name);
+                if (r < 0)
+                        return table_log_add_error(r);
+        }
+
+        if (i->os_support_end != USEC_INFINITY) {
+                usec_t n = now(CLOCK_REALTIME);
+
+                r = table_add_many(table,
+                                   TABLE_FIELD, "OS Support End",
+                                   TABLE_TIMESTAMP_DATE, i->os_support_end,
+                                   TABLE_FIELD, n < i->os_support_end ? "OS Support Remaining" : "OS Support Expired",
+                                   TABLE_TIMESPAN_DAY, n < i->os_support_end ? i->os_support_end - n : n - i->os_support_end,
+                                   TABLE_SET_COLOR, os_support_end_color(n, i->os_support_end));
+                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_FIELD, "Kernel",
+                                   TABLE_STRING, v);
+                if (r < 0)
+                        return table_log_add_error(r);
+        }
+
+        if (!isempty(i->architecture)) {
+                r = table_add_many(table,
+                                   TABLE_FIELD, "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_FIELD, "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_FIELD, "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_FIELD, "Firmware Version",
+                                   TABLE_STRING, i->firmware_version);
+                if (r < 0)
+                        return table_log_add_error(r);
+        }
+
+        if (timestamp_is_set(i->firmware_date)) {
+                usec_t n = now(CLOCK_REALTIME);
+
+                r = table_add_many(table,
+                                   TABLE_FIELD, "Firmware Date",
+                                   TABLE_TIMESTAMP_DATE, i->firmware_date);
+                if (r < 0)
+                        return table_log_add_error(r);
+
+                if (i->firmware_date < n) {
+                        r = table_add_many(table,
+                                           TABLE_FIELD, "Firmware Age",
+                                           TABLE_TIMESPAN_DAY, n - i->firmware_date,
+                                           TABLE_SET_COLOR, n - i->firmware_date > USEC_PER_YEAR*2 ? ANSI_HIGHLIGHT_YELLOW : NULL);
+                        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 = bus_get_property(bus, bus_hostname, 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)      },
+                { "OperatingSystemSupportEnd", "t",  NULL,          offsetof(StatusInfo, os_support_end)   },
+                { "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) },
+                { "FirmwareDate",              "t",  NULL,          offsetof(StatusInfo, firmware_date)    },
+                { "MachineID",                 "ay", bus_map_id128, offsetof(StatusInfo, machine_id)       },
+                { "BootID",                    "ay", bus_map_id128, offsetof(StatusInfo, boot_id)          },
+                {}
+        }, 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));
+
+        /* For older version of hostnamed. */
+        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 = bus_call_method(bus, bus_hostname, "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 = bus_call_method(bus, bus_hostname, 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, RUNTIME_SCOPE_SYSTEM, &bus);
+        if (r < 0)
+                return bus_log_connect_error(r, arg_transport);
+
+        return hostnamectl_main(bus, argc, argv);
+}
+
+DEFINE_MAIN_FUNCTION(run);
diff --git a/src/hostname/hostnamed.c b/src/hostname/hostnamed.c
new file mode 100644
index 0000000..fc7a97f
--- /dev/null
+++ b/src/hostname/hostnamed.c
@@ -0,0 +1,1633 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <errno.h>
+#include <sys/utsname.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "alloc-util.h"
+#include "bus-common-errors.h"
+#include "bus-get-properties.h"
+#include "bus-log-control-api.h"
+#include "bus-polkit.h"
+#include "constants.h"
+#include "env-file-label.h"
+#include "env-file.h"
+#include "env-util.h"
+#include "fileio-label.h"
+#include "fileio.h"
+#include "hostname-setup.h"
+#include "hostname-util.h"
+#include "id128-util.h"
+#include "json.h"
+#include "main-func.h"
+#include "missing_capability.h"
+#include "nscd-flush.h"
+#include "nulstr-util.h"
+#include "os-util.h"
+#include "parse-util.h"
+#include "path-util.h"
+#include "sd-device.h"
+#include "selinux-util.h"
+#include "service-util.h"
+#include "signal-util.h"
+#include "stat-util.h"
+#include "string-table.h"
+#include "strv.h"
+#include "user-util.h"
+#include "virt.h"
+
+#define VALID_DEPLOYMENT_CHARS (DIGITS LETTERS "-.:")
+
+/* Properties we cache are indexed by an enum, to make invalidation easy and systematic (as we can iterate
+ * through them all, and they are uniformly strings). */
+typedef enum {
+        /* Read from /etc/hostname */
+        PROP_STATIC_HOSTNAME,
+
+        /* Read from /etc/machine-info */
+        PROP_PRETTY_HOSTNAME,
+        PROP_ICON_NAME,
+        PROP_CHASSIS,
+        PROP_DEPLOYMENT,
+        PROP_LOCATION,
+        PROP_HARDWARE_VENDOR,
+        PROP_HARDWARE_MODEL,
+
+        /* Read from /etc/os-release (or /usr/lib/os-release) */
+        PROP_OS_PRETTY_NAME,
+        PROP_OS_CPE_NAME,
+        PROP_OS_HOME_URL,
+        PROP_OS_SUPPORT_END,
+        _PROP_MAX,
+        _PROP_INVALID = -EINVAL,
+} HostProperty;
+
+typedef struct Context {
+        char *data[_PROP_MAX];
+
+        HostnameSource hostname_source;
+
+        struct stat etc_hostname_stat;
+        struct stat etc_os_release_stat;
+        struct stat etc_machine_info_stat;
+
+        Hashmap *polkit_registry;
+} Context;
+
+static void context_reset(Context *c, uint64_t mask) {
+        assert(c);
+
+        for (int p = 0; p < _PROP_MAX; p++) {
+                if (!FLAGS_SET(mask, UINT64_C(1) << p))
+                        continue;
+
+                c->data[p] = mfree(c->data[p]);
+        }
+}
+
+static void context_destroy(Context *c) {
+        assert(c);
+
+        context_reset(c, UINT64_MAX);
+        bus_verify_polkit_async_registry_free(c->polkit_registry);
+}
+
+static void context_read_etc_hostname(Context *c) {
+        struct stat current_stat = {};
+        int r;
+
+        assert(c);
+
+        if (stat("/etc/hostname", &current_stat) >= 0 &&
+            stat_inode_unmodified(&c->etc_hostname_stat, &current_stat))
+                return;
+
+        context_reset(c, UINT64_C(1) << PROP_STATIC_HOSTNAME);
+
+        r = read_etc_hostname(NULL, &c->data[PROP_STATIC_HOSTNAME]);
+        if (r < 0 && r != -ENOENT)
+                log_warning_errno(r, "Failed to read /etc/hostname, ignoring: %m");
+
+        c->etc_hostname_stat = current_stat;
+}
+
+static void context_read_machine_info(Context *c) {
+        struct stat current_stat = {};
+        int r;
+
+        assert(c);
+
+        if (stat("/etc/machine-info", &current_stat) >= 0 &&
+            stat_inode_unmodified(&c->etc_machine_info_stat, &current_stat))
+                return;
+
+        context_reset(c,
+                      (UINT64_C(1) << PROP_PRETTY_HOSTNAME) |
+                      (UINT64_C(1) << PROP_ICON_NAME) |
+                      (UINT64_C(1) << PROP_CHASSIS) |
+                      (UINT64_C(1) << PROP_DEPLOYMENT) |
+                      (UINT64_C(1) << PROP_LOCATION) |
+                      (UINT64_C(1) << PROP_HARDWARE_VENDOR) |
+                      (UINT64_C(1) << PROP_HARDWARE_MODEL));
+
+        r = parse_env_file(NULL, "/etc/machine-info",
+                           "PRETTY_HOSTNAME", &c->data[PROP_PRETTY_HOSTNAME],
+                           "ICON_NAME", &c->data[PROP_ICON_NAME],
+                           "CHASSIS", &c->data[PROP_CHASSIS],
+                           "DEPLOYMENT", &c->data[PROP_DEPLOYMENT],
+                           "LOCATION", &c->data[PROP_LOCATION],
+                           "HARDWARE_VENDOR", &c->data[PROP_HARDWARE_VENDOR],
+                           "HARDWARE_MODEL", &c->data[PROP_HARDWARE_MODEL]);
+        if (r < 0 && r != -ENOENT)
+                log_warning_errno(r, "Failed to read /etc/machine-info, ignoring: %m");
+
+        c->etc_machine_info_stat = current_stat;
+}
+
+static void context_read_os_release(Context *c) {
+        _cleanup_free_ char *os_name = NULL, *os_pretty_name = NULL;
+        struct stat current_stat = {};
+        int r;
+
+        assert(c);
+
+        if ((stat("/etc/os-release", &current_stat) >= 0 ||
+             stat("/usr/lib/os-release", &current_stat) >= 0) &&
+            stat_inode_unmodified(&c->etc_os_release_stat, &current_stat))
+                return;
+
+        context_reset(c,
+                      (UINT64_C(1) << PROP_OS_PRETTY_NAME) |
+                      (UINT64_C(1) << PROP_OS_CPE_NAME) |
+                      (UINT64_C(1) << PROP_OS_HOME_URL) |
+                      (UINT64_C(1) << PROP_OS_SUPPORT_END));
+
+        r = parse_os_release(NULL,
+                             "PRETTY_NAME", &os_pretty_name,
+                             "NAME",        &os_name,
+                             "CPE_NAME",    &c->data[PROP_OS_CPE_NAME],
+                             "HOME_URL",    &c->data[PROP_OS_HOME_URL],
+                             "SUPPORT_END", &c->data[PROP_OS_SUPPORT_END]);
+        if (r < 0 && r != -ENOENT)
+                log_warning_errno(r, "Failed to read os-release file, ignoring: %m");
+
+        if (free_and_strdup(&c->data[PROP_OS_PRETTY_NAME], os_release_pretty_name(os_pretty_name, os_name)) < 0)
+                log_oom();
+
+        c->etc_os_release_stat = current_stat;
+}
+
+static bool use_dmi_data(void) {
+        int r;
+
+        r = getenv_bool("SYSTEMD_HOSTNAME_FORCE_DMI");
+        if (r >= 0) {
+                log_debug("Honouring $SYSTEMD_HOSTNAME_FORCE_DMI override: %s", yes_no(r));
+                return r;
+        }
+        if (r != -ENXIO)
+                log_debug_errno(r, "Failed to parse $SYSTEMD_HOSTNAME_FORCE_DMI, ignoring: %m");
+
+        if (detect_container() > 0) {
+                log_debug("Running in a container, not using DMI hardware data.");
+                return false;
+        }
+
+        return true;
+}
+
+static int get_dmi_data(const char *database_key, const char *regular_key, char **ret) {
+        _cleanup_(sd_device_unrefp) sd_device *device = NULL;
+        _cleanup_free_ char *b = NULL;
+        const char *s = NULL;
+        int r;
+
+        if (!use_dmi_data())
+                return -ENOENT;
+
+        r = sd_device_new_from_syspath(&device, "/sys/class/dmi/id");
+        if (r < 0)
+                return log_debug_errno(r, "Failed to open /sys/class/dmi/id device, ignoring: %m");
+
+        if (database_key)
+                (void) sd_device_get_property_value(device, database_key, &s);
+        if (!s && regular_key)
+                (void) sd_device_get_property_value(device, regular_key, &s);
+
+        if (!ret)
+                return !!s;
+
+        if (s) {
+                b = strdup(s);
+                if (!b)
+                        return -ENOMEM;
+        }
+
+        *ret = TAKE_PTR(b);
+        return !!s;
+}
+
+static int get_hardware_vendor(char **ret) {
+        return get_dmi_data("ID_VENDOR_FROM_DATABASE", "ID_VENDOR", ret);
+}
+
+static int get_hardware_model(char **ret) {
+        return get_dmi_data("ID_MODEL_FROM_DATABASE", "ID_MODEL", ret);
+}
+
+static int get_hardware_firmware_data(const char *sysattr, char **ret) {
+        _cleanup_(sd_device_unrefp) sd_device *device = NULL;
+        _cleanup_free_ char *b = NULL;
+        const char *s = NULL;
+        int r;
+
+        assert(sysattr);
+
+        if (!use_dmi_data())
+                return -ENOENT;
+
+        r = sd_device_new_from_syspath(&device, "/sys/class/dmi/id");
+        if (r < 0)
+                return log_debug_errno(r, "Failed to open /sys/class/dmi/id device, ignoring: %m");
+
+        (void) sd_device_get_sysattr_value(device, sysattr, &s);
+        if (!isempty(s)) {
+                b = strdup(s);
+                if (!b)
+                        return -ENOMEM;
+        }
+
+        if (ret)
+                *ret = TAKE_PTR(b);
+
+        return !isempty(s);
+}
+
+static int get_hardware_serial(char **ret) {
+         int r;
+
+         r = get_hardware_firmware_data("product_serial", ret);
+         if (r <= 0)
+                return get_hardware_firmware_data("board_serial", ret);
+
+         return r;
+}
+
+static int get_firmware_version(char **ret) {
+         return get_hardware_firmware_data("bios_version", ret);
+}
+
+static int get_firmware_vendor(char **ret) {
+         return get_hardware_firmware_data("bios_vendor", ret);
+}
+
+static int get_firmware_date(usec_t *ret) {
+         _cleanup_free_ char *bios_date = NULL, *month = NULL, *day = NULL, *year = NULL;
+         int r;
+
+         assert(ret);
+
+         r = get_hardware_firmware_data("bios_date", &bios_date);
+         if (r < 0)
+                return r;
+         if (r == 0) {
+                *ret = USEC_INFINITY;
+                return 0;
+         }
+
+         const char *p = bios_date;
+         r = extract_many_words(&p, "/", EXTRACT_DONT_COALESCE_SEPARATORS, &month, &day, &year, NULL);
+         if (r < 0)
+                return r;
+         if (r != 3) /* less than three args read? */
+                return -EINVAL;
+         if (!isempty(p)) /* more left in the string? */
+                return -EINVAL;
+
+         unsigned m, d, y;
+         r = safe_atou_full(month, 10 | SAFE_ATO_REFUSE_PLUS_MINUS | SAFE_ATO_REFUSE_LEADING_WHITESPACE, &m);
+         if (r < 0)
+                return r;
+         if (m < 1 || m > 12)
+                return -EINVAL;
+         m -= 1;
+
+         r = safe_atou_full(day, 10 | SAFE_ATO_REFUSE_PLUS_MINUS | SAFE_ATO_REFUSE_LEADING_WHITESPACE, &d);
+         if (r < 0)
+                return r;
+         if (d < 1 || d > 31)
+                return -EINVAL;
+
+         r = safe_atou_full(year, 10 | SAFE_ATO_REFUSE_PLUS_MINUS | SAFE_ATO_REFUSE_LEADING_WHITESPACE, &y);
+         if (r < 0)
+                return r;
+         if (y < 1970 || y > (unsigned) INT_MAX)
+                return -EINVAL;
+         y -= 1900;
+
+         struct tm tm = {
+                .tm_mday = d,
+                .tm_mon = m,
+                .tm_year = y,
+         };
+         time_t v = timegm(&tm);
+         if (v == (time_t) -1)
+                return -errno;
+         if (tm.tm_mday != (int) d || tm.tm_mon != (int) m || tm.tm_year != (int) y)
+                return -EINVAL; /* date was not normalized? (e.g. "30th of feb") */
+
+         *ret = (usec_t) v * USEC_PER_SEC;
+
+         return 0;
+}
+
+static const char* valid_chassis(const char *chassis) {
+        assert(chassis);
+
+        return nulstr_get(
+                        "vm\0"
+                        "container\0"
+                        "desktop\0"
+                        "laptop\0"
+                        "convertible\0"
+                        "server\0"
+                        "tablet\0"
+                        "handset\0"
+                        "watch\0"
+                        "embedded\0",
+                        chassis);
+}
+
+static bool valid_deployment(const char *deployment) {
+        assert(deployment);
+
+        return in_charset(deployment, VALID_DEPLOYMENT_CHARS);
+}
+
+static const char* fallback_chassis(void) {
+        const char *chassis;
+        _cleanup_free_ char *type = NULL;
+        Virtualization v;
+        unsigned t;
+        int r;
+
+        v = detect_virtualization();
+        if (v < 0)
+                log_debug_errno(v, "Failed to detect virtualization, ignoring: %m");
+        else if (VIRTUALIZATION_IS_VM(v))
+                return "vm";
+        else if (VIRTUALIZATION_IS_CONTAINER(v))
+                return "container";
+
+        r = read_one_line_file("/sys/class/dmi/id/chassis_type", &type);
+        if (r < 0) {
+                log_debug_errno(r, "Failed to read DMI chassis type, ignoring: %m");
+                goto try_acpi;
+        }
+
+        r = safe_atou(type, &t);
+        if (r < 0) {
+                log_debug_errno(r, "Failed to parse DMI chassis type \"%s\", ignoring: %m", type);
+                goto try_acpi;
+        }
+
+        /* We only list the really obvious cases here. The DMI data is unreliable enough, so let's not do any
+         * additional guesswork on top of that.
+         *
+         * See the SMBIOS Specification 3.5.0 section 7.4.1 for details about the values listed here:
+         *
+         * https://www.dmtf.org/sites/default/files/standards/documents/DSP0134_3.5.0.pdf
+         */
+
+        switch (t) {
+
+        case 0x03: /* Desktop */
+        case 0x04: /* Low Profile Desktop */
+        case 0x06: /* Mini Tower */
+        case 0x07: /* Tower */
+        case 0x0D: /* All in one (i.e. PC built into monitor) */
+        case 0x23: /* Mini PC */
+        case 0x24: /* Stick PC */
+                return "desktop";
+
+        case 0x8: /* Portable */
+        case 0x9: /* Laptop */
+        case 0xA: /* Notebook */
+        case 0xE: /* Sub Notebook */
+                return "laptop";
+
+        case 0xB: /* Hand Held */
+                return "handset";
+
+        case 0x11: /* Main Server Chassis */
+        case 0x1C: /* Blade */
+        case 0x1D: /* Blade Enclosure */
+                return "server";
+
+        case 0x1E: /* Tablet */
+                return "tablet";
+
+        case 0x1F: /* Convertible */
+        case 0x20: /* Detachable */
+                return "convertible";
+
+        case 0x21: /* IoT Gateway */
+        case 0x22: /* Embedded PC */
+                return "embedded";
+
+        default:
+                log_debug("Unhandled DMI chassis type 0x%02x, ignoring.", t);
+        }
+
+try_acpi:
+        type = mfree(type);
+        r = read_one_line_file("/sys/firmware/acpi/pm_profile", &type);
+        if (r < 0) {
+                log_debug_errno(r, "Failed read ACPI PM profile, ignoring: %m");
+                goto try_devicetree;
+        }
+
+        r = safe_atou(type, &t);
+        if (r < 0) {
+                log_debug_errno(r, "Failed parse ACPI PM profile \"%s\", ignoring: %m", type);
+                goto try_devicetree;
+        }
+
+        /* We only list the really obvious cases here as the ACPI data is not really super reliable.
+         *
+         * See the ACPI 5.0 Spec Section 5.2.9.1 for details:
+         *
+         * http://www.acpi.info/DOWNLOADS/ACPIspec50.pdf
+         */
+
+        switch (t) {
+
+        case 1: /* Desktop */
+        case 3: /* Workstation */
+        case 6: /* Appliance PC */
+                return "desktop";
+
+        case 2: /* Mobile */
+                return "laptop";
+
+        case 4: /* Enterprise Server */
+        case 5: /* SOHO Server */
+        case 7: /* Performance Server */
+                return "server";
+
+        case 8: /* Tablet */
+                return "tablet";
+
+        default:
+                log_debug("Unhandled ACPI PM profile 0x%02x, ignoring.", t);
+        }
+
+try_devicetree:
+        type = mfree(type);
+        r = read_one_line_file("/proc/device-tree/chassis-type", &type);
+        if (r < 0) {
+                log_debug_errno(r, "Failed to read device-tree chassis type, ignoring: %m");
+                return NULL;
+        }
+
+        /* Note that the Devicetree specification uses the very same vocabulary
+         * of chassis types as we do, hence we do not need to translate these types:
+         *
+         * https://github.com/devicetree-org/devicetree-specification/blob/master/source/chapter3-devicenodes.rst */
+        chassis = valid_chassis(type);
+        if (!chassis)
+                log_debug("Invalid device-tree chassis type \"%s\", ignoring.", type);
+        return chassis;
+}
+
+static char* context_get_chassis(Context *c) {
+        const char *fallback;
+        char *dmi;
+
+        assert(c);
+
+        if (!isempty(c->data[PROP_CHASSIS]))
+                return strdup(c->data[PROP_CHASSIS]);
+
+        if (get_dmi_data("ID_CHASSIS", NULL, &dmi) > 0)
+                return dmi;
+
+        fallback = fallback_chassis();
+        if (fallback)
+                return strdup(fallback);
+
+        return NULL;
+}
+
+static char* context_fallback_icon_name(Context *c) {
+        _cleanup_free_ char *chassis = NULL;
+
+        assert(c);
+
+        chassis = context_get_chassis(c);
+        if (chassis)
+                return strjoin("computer-", chassis);
+
+        return strdup("computer");
+}
+
+static int context_update_kernel_hostname(
+                Context *c,
+                const char *transient_hn) {
+
+        _cleanup_free_ char *_hn_free = NULL;
+        const char *hn;
+        HostnameSource hns;
+        int r;
+
+        assert(c);
+
+        /* /etc/hostname has the highest preference ... */
+        if (c->data[PROP_STATIC_HOSTNAME]) {
+                hn = c->data[PROP_STATIC_HOSTNAME];
+                hns = HOSTNAME_STATIC;
+
+        /* ... the transient hostname, (ie: DHCP) comes next ... */
+        } else if (transient_hn) {
+                hn = transient_hn;
+                hns = HOSTNAME_TRANSIENT;
+
+        /* ... and the ultimate fallback */
+        } else {
+                hn = _hn_free = get_default_hostname();
+                if (!hn)
+                        return log_oom();
+
+                hns = HOSTNAME_DEFAULT;
+        }
+
+        r = sethostname_idempotent(hn);
+        if (r < 0)
+                return log_error_errno(r, "Failed to set hostname: %m");
+
+        if (c->hostname_source != hns) {
+                c->hostname_source = hns;
+                r = 1;
+        }
+
+        (void) nscd_flush_cache(STRV_MAKE("hosts"));
+
+        if (r == 0)
+                log_debug("Hostname was already set to <%s>.", hn);
+        else {
+                log_info("Hostname set to <%s> (%s)", hn, hostname_source_to_string(hns));
+
+                hostname_update_source_hint(hn, hns);
+        }
+
+        return r; /* 0 if no change, 1 if something was done  */
+}
+
+static void unset_statp(struct stat **p) {
+        if (!*p)
+                return;
+
+        **p = (struct stat) {};
+}
+
+static int context_write_data_static_hostname(Context *c) {
+        _cleanup_(unset_statp) struct stat *s = NULL;
+        int r;
+
+        assert(c);
+
+        /* Make sure that if we fail here, we invalidate the cached information, since it was updated
+         * already, even if we can't make it hit the disk. */
+        s = &c->etc_hostname_stat;
+
+        if (isempty(c->data[PROP_STATIC_HOSTNAME])) {
+                if (unlink("/etc/hostname") < 0 && errno != ENOENT)
+                        return -errno;
+
+                TAKE_PTR(s);
+                return 0;
+        }
+
+        r = write_string_file_atomic_label("/etc/hostname", c->data[PROP_STATIC_HOSTNAME]);
+        if (r < 0)
+                return r;
+
+        TAKE_PTR(s);
+        return 0;
+}
+
+static int context_write_data_machine_info(Context *c) {
+        _cleanup_(unset_statp) struct stat *s = NULL;
+        static const char * const name[_PROP_MAX] = {
+                [PROP_PRETTY_HOSTNAME] = "PRETTY_HOSTNAME",
+                [PROP_ICON_NAME] = "ICON_NAME",
+                [PROP_CHASSIS] = "CHASSIS",
+                [PROP_DEPLOYMENT] = "DEPLOYMENT",
+                [PROP_LOCATION] = "LOCATION",
+        };
+        _cleanup_strv_free_ char **l = NULL;
+        int r;
+
+        assert(c);
+
+        /* Make sure that if we fail here, we invalidate the cached information, since it was updated
+         * already, even if we can't make it hit the disk. */
+        s = &c->etc_machine_info_stat;
+
+        r = load_env_file(NULL, "/etc/machine-info", &l);
+        if (r < 0 && r != -ENOENT)
+                return r;
+
+        for (int p = PROP_PRETTY_HOSTNAME; p <= PROP_LOCATION; p++) {
+                assert(name[p]);
+
+                r = strv_env_assign(&l, name[p], empty_to_null(c->data[p]));
+                if (r < 0)
+                        return r;
+        }
+
+        if (strv_isempty(l)) {
+                if (unlink("/etc/machine-info") < 0 && errno != ENOENT)
+                        return -errno;
+
+                TAKE_PTR(s);
+                return 0;
+        }
+
+        r = write_env_file_label(AT_FDCWD, "/etc/machine-info", NULL, l);
+        if (r < 0)
+                return r;
+
+        TAKE_PTR(s);
+        return 0;
+}
+
+static int property_get_hardware_property(
+                sd_bus_message *reply,
+                Context *c,
+                HostProperty prop,
+                int (*getter)(char **)) {
+
+        _cleanup_free_ char *from_dmi = NULL;
+
+        assert(reply);
+        assert(c);
+        assert(IN_SET(prop, PROP_HARDWARE_VENDOR, PROP_HARDWARE_MODEL));
+        assert(getter);
+
+        context_read_machine_info(c);
+
+        if (isempty(c->data[prop]))
+                (void) getter(&from_dmi);
+
+        return sd_bus_message_append(reply, "s", from_dmi ?: c->data[prop]);
+}
+
+static int property_get_hardware_vendor(
+                sd_bus *bus,
+                const char *path,
+                const char *interface,
+                const char *property,
+                sd_bus_message *reply,
+                void *userdata,
+                sd_bus_error *error) {
+
+        return property_get_hardware_property(reply, userdata, PROP_HARDWARE_VENDOR, get_hardware_vendor);
+}
+
+static int property_get_hardware_model(
+                sd_bus *bus,
+                const char *path,
+                const char *interface,
+                const char *property,
+                sd_bus_message *reply,
+                void *userdata,
+                sd_bus_error *error) {
+
+        return property_get_hardware_property(reply, userdata, PROP_HARDWARE_MODEL, get_hardware_model);
+}
+
+static int property_get_firmware_version(
+                sd_bus *bus,
+                const char *path,
+                const char *interface,
+                const char *property,
+                sd_bus_message *reply,
+                void *userdata,
+                sd_bus_error *error) {
+
+        _cleanup_free_ char *firmware_version = NULL;
+
+        (void) get_firmware_version(&firmware_version);
+
+        return sd_bus_message_append(reply, "s", firmware_version);
+}
+
+static int property_get_firmware_vendor(
+                sd_bus *bus,
+                const char *path,
+                const char *interface,
+                const char *property,
+                sd_bus_message *reply,
+                void *userdata,
+                sd_bus_error *error) {
+
+        _cleanup_free_ char *firmware_vendor = NULL;
+
+        (void) get_firmware_vendor(&firmware_vendor);
+
+        return sd_bus_message_append(reply, "s", firmware_vendor);
+}
+
+static int property_get_firmware_date(
+                sd_bus *bus,
+                const char *path,
+                const char *interface,
+                const char *property,
+                sd_bus_message *reply,
+                void *userdata,
+                sd_bus_error *error) {
+
+        usec_t firmware_date = USEC_INFINITY;
+
+        (void) get_firmware_date(&firmware_date);
+
+        return sd_bus_message_append(reply, "t", firmware_date);
+}
+static int property_get_hostname(
+                sd_bus *bus,
+                const char *path,
+                const char *interface,
+                const char *property,
+                sd_bus_message *reply,
+                void *userdata,
+                sd_bus_error *error) {
+
+        _cleanup_free_ char *hn = NULL;
+        int r;
+
+        r = gethostname_strict(&hn);
+        if (r < 0) {
+                if (r != -ENXIO)
+                        return r;
+
+                hn = get_default_hostname();
+                if (!hn)
+                        return -ENOMEM;
+        }
+
+        return sd_bus_message_append(reply, "s", hn);
+}
+
+static int property_get_static_hostname(
+                sd_bus *bus,
+                const char *path,
+                const char *interface,
+                const char *property,
+                sd_bus_message *reply,
+                void *userdata,
+                sd_bus_error *error) {
+
+        Context *c = ASSERT_PTR(userdata);
+
+        context_read_etc_hostname(c);
+
+        return sd_bus_message_append(reply, "s", c->data[PROP_STATIC_HOSTNAME]);
+}
+
+static int property_get_default_hostname(
+                sd_bus *bus,
+                const char *path,
+                const char *interface,
+                const char *property,
+                sd_bus_message *reply,
+                void *userdata,
+                sd_bus_error *error) {
+
+        _cleanup_free_ char *hn = NULL;
+
+        hn = get_default_hostname();
+        if (!hn)
+                return log_oom();
+
+        return sd_bus_message_append(reply, "s", hn);
+}
+
+static void context_determine_hostname_source(Context *c) {
+        _cleanup_free_ char *hostname = NULL;
+        int r;
+
+        assert(c);
+
+        if (c->hostname_source >= 0)
+                return;
+
+        (void) gethostname_full(GET_HOSTNAME_ALLOW_LOCALHOST, &hostname);
+
+        if (streq_ptr(hostname, c->data[PROP_STATIC_HOSTNAME]))
+                c->hostname_source = HOSTNAME_STATIC;
+        else {
+                _cleanup_free_ char *fallback = NULL;
+
+                /* If the hostname was not set by us, try to figure out where it came from. If we set it to
+                 * the default hostname, the file will tell us. We compare the string because it is possible
+                 * that the hostname was set by an older version that had a different fallback, in the initrd
+                 * or before we reexecuted. */
+
+                r = read_one_line_file("/run/systemd/default-hostname", &fallback);
+                if (r < 0 && r != -ENOENT)
+                        log_warning_errno(r, "Failed to read /run/systemd/default-hostname, ignoring: %m");
+
+                if (streq_ptr(fallback, hostname))
+                        c->hostname_source = HOSTNAME_DEFAULT;
+                else
+                        c->hostname_source = HOSTNAME_TRANSIENT;
+        }
+}
+
+static int property_get_hostname_source(
+                sd_bus *bus,
+                const char *path,
+                const char *interface,
+                const char *property,
+                sd_bus_message *reply,
+                void *userdata,
+                sd_bus_error *error) {
+
+        Context *c = ASSERT_PTR(userdata);
+
+        context_read_etc_hostname(c);
+        context_determine_hostname_source(c);
+
+        return sd_bus_message_append(reply, "s", hostname_source_to_string(c->hostname_source));
+}
+
+static int property_get_machine_info_field(
+                sd_bus *bus,
+                const char *path,
+                const char *interface,
+                const char *property,
+                sd_bus_message *reply,
+                void *userdata,
+                sd_bus_error *error) {
+
+        sd_bus_slot *slot;
+        Context *c;
+
+        /* Acquire the context object without this property's userdata offset added. Explanation: we want
+         * access to two pointers here: a) the main context object we cache all properties in, and b) the
+         * pointer to the property field inside the context object that we are supposed to update and
+         * use. The latter (b) we get in the 'userdata' function parameter, and sd-bus calculates that for us
+         * from the 'userdata' pointer we supplied when the vtable was registered, with the offset we
+         * specified in the vtable added on top. To get the former (a) we need the 'userdata' pointer from
+         * the vtable registration directly, without the offset added. Hence we ask sd-bus what the slot
+         * object is (which encapsulates the vtable registration), and then query the 'userdata' field
+         * directly off it. */
+        assert_se(slot = sd_bus_get_current_slot(bus));
+        assert_se(c = sd_bus_slot_get_userdata(slot));
+
+        context_read_machine_info(c);
+
+        return sd_bus_message_append(reply, "s", *(char**) userdata);
+}
+
+static int property_get_os_release_field(
+                sd_bus *bus,
+                const char *path,
+                const char *interface,
+                const char *property,
+                sd_bus_message *reply,
+                void *userdata,
+                sd_bus_error *error) {
+
+        sd_bus_slot *slot;
+        Context *c;
+
+        /* As above, acquire the current context without this property's userdata offset added. */
+        assert_se(slot = sd_bus_get_current_slot(bus));
+        assert_se(c = sd_bus_slot_get_userdata(slot));
+
+        context_read_os_release(c);
+
+        return sd_bus_message_append(reply, "s", *(char**) userdata);
+}
+
+static int property_get_os_support_end(
+                sd_bus *bus,
+                const char *path,
+                const char *interface,
+                const char *property,
+                sd_bus_message *reply,
+                void *userdata,
+                sd_bus_error *error) {
+
+        Context *c = userdata;
+        usec_t eol = USEC_INFINITY;
+
+        context_read_os_release(c);
+
+        if (c->data[PROP_OS_SUPPORT_END])
+                (void) os_release_support_ended(c->data[PROP_OS_SUPPORT_END], /* quiet= */ false, &eol);
+
+        return sd_bus_message_append(reply, "t", eol);
+}
+
+static int property_get_icon_name(
+                sd_bus *bus,
+                const char *path,
+                const char *interface,
+                const char *property,
+                sd_bus_message *reply,
+                void *userdata,
+                sd_bus_error *error) {
+
+        _cleanup_free_ char *n = NULL;
+        Context *c = userdata;
+        const char *name;
+
+        context_read_machine_info(c);
+
+        if (isempty(c->data[PROP_ICON_NAME]))
+                name = n = context_fallback_icon_name(c);
+        else
+                name = c->data[PROP_ICON_NAME];
+
+        if (!name)
+                return -ENOMEM;
+
+        return sd_bus_message_append(reply, "s", name);
+}
+
+static int property_get_chassis(
+                sd_bus *bus,
+                const char *path,
+                const char *interface,
+                const char *property,
+                sd_bus_message *reply,
+                void *userdata,
+                sd_bus_error *error) {
+
+        _cleanup_free_ char *chassis = NULL;
+        Context *c = userdata;
+
+        context_read_machine_info(c);
+
+        chassis = context_get_chassis(c);
+
+        return sd_bus_message_append(reply, "s", chassis);
+}
+
+static int property_get_uname_field(
+                sd_bus *bus,
+                const char *path,
+                const char *interface,
+                const char *property,
+                sd_bus_message *reply,
+                void *userdata,
+                sd_bus_error *error) {
+
+        struct utsname u;
+
+        assert_se(uname(&u) >= 0);
+
+        return sd_bus_message_append(reply, "s", (char*) &u + PTR_TO_SIZE(userdata));
+}
+
+static int property_get_machine_id(
+                sd_bus *bus,
+                const char *path,
+                const char *interface,
+                const char *property,
+                sd_bus_message *reply,
+                void *userdata,
+                sd_bus_error *error) {
+
+        sd_id128_t id;
+        int r;
+
+        r = sd_id128_get_machine(&id);
+        if (r < 0)
+                return r;
+
+        return bus_property_get_id128(bus, path, interface, property, reply, &id, error);
+}
+
+static int property_get_boot_id(
+                sd_bus *bus,
+                const char *path,
+                const char *interface,
+                const char *property,
+                sd_bus_message *reply,
+                void *userdata,
+                sd_bus_error *error) {
+
+        sd_id128_t id;
+        int r;
+
+        r = sd_id128_get_boot(&id);
+        if (r < 0)
+                return r;
+
+        return bus_property_get_id128(bus, path, interface, property, reply, &id, error);
+}
+
+static int method_set_hostname(sd_bus_message *m, void *userdata, sd_bus_error *error) {
+        Context *c = ASSERT_PTR(userdata);
+        const char *name;
+        int interactive, r;
+
+        assert(m);
+
+        r = sd_bus_message_read(m, "sb", &name, &interactive);
+        if (r < 0)
+                return r;
+
+        name = empty_to_null(name);
+
+        /* We always go through with the procedure below without comparing to the current hostname, because
+         * we might want to adjust hostname source information even if the actual hostname is unchanged. */
+
+        if (name && !hostname_is_valid(name, 0))
+                return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid hostname '%s'", name);
+
+        context_read_etc_hostname(c);
+
+        r = bus_verify_polkit_async(
+                        m,
+                        CAP_SYS_ADMIN,
+                        "org.freedesktop.hostname1.set-hostname",
+                        NULL,
+                        interactive,
+                        UID_INVALID,
+                        &c->polkit_registry,
+                        error);
+        if (r < 0)
+                return r;
+        if (r == 0)
+                return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
+
+        r = context_update_kernel_hostname(c, name);
+        if (r < 0)
+                return sd_bus_error_set_errnof(error, r, "Failed to set hostname: %m");
+        else if (r > 0)
+                (void) sd_bus_emit_properties_changed(sd_bus_message_get_bus(m),
+                                                      "/org/freedesktop/hostname1", "org.freedesktop.hostname1",
+                                                      "Hostname", "HostnameSource", NULL);
+
+        return sd_bus_reply_method_return(m, NULL);
+}
+
+static int method_set_static_hostname(sd_bus_message *m, void *userdata, sd_bus_error *error) {
+        Context *c = ASSERT_PTR(userdata);
+        const char *name;
+        int interactive;
+        int r;
+
+        assert(m);
+
+        r = sd_bus_message_read(m, "sb", &name, &interactive);
+        if (r < 0)
+                return r;
+
+        name = empty_to_null(name);
+
+        context_read_etc_hostname(c);
+
+        if (streq_ptr(name, c->data[PROP_STATIC_HOSTNAME]))
+                return sd_bus_reply_method_return(m, NULL);
+
+        if (name && !hostname_is_valid(name, 0))
+                return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid static hostname '%s'", name);
+
+        r = bus_verify_polkit_async(
+                        m,
+                        CAP_SYS_ADMIN,
+                        "org.freedesktop.hostname1.set-static-hostname",
+                        NULL,
+                        interactive,
+                        UID_INVALID,
+                        &c->polkit_registry,
+                        error);
+        if (r < 0)
+                return r;
+        if (r == 0)
+                return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
+
+        r = free_and_strdup_warn(&c->data[PROP_STATIC_HOSTNAME], name);
+        if (r < 0)
+                return r;
+
+        r = context_write_data_static_hostname(c);
+        if (r < 0) {
+                log_error_errno(r, "Failed to write static hostname: %m");
+                if (ERRNO_IS_PRIVILEGE(r))
+                        return sd_bus_error_set(error, BUS_ERROR_FILE_IS_PROTECTED, "Not allowed to update /etc/hostname.");
+                if (r == -EROFS)
+                        return sd_bus_error_set(error, BUS_ERROR_READ_ONLY_FILESYSTEM, "/etc/hostname is in a read-only filesystem.");
+                return sd_bus_error_set_errnof(error, r, "Failed to set static hostname: %m");
+        }
+
+        r = context_update_kernel_hostname(c, NULL);
+        if (r < 0) {
+                log_error_errno(r, "Failed to set hostname: %m");
+                return sd_bus_error_set_errnof(error, r, "Failed to set hostname: %m");
+        }
+
+        (void) sd_bus_emit_properties_changed(sd_bus_message_get_bus(m),
+                                              "/org/freedesktop/hostname1", "org.freedesktop.hostname1",
+                                              "StaticHostname", "Hostname", "HostnameSource", NULL);
+
+        return sd_bus_reply_method_return(m, NULL);
+}
+
+static int set_machine_info(Context *c, sd_bus_message *m, int prop, sd_bus_message_handler_t cb, sd_bus_error *error) {
+        int interactive;
+        const char *name;
+        int r;
+
+        assert(c);
+        assert(m);
+
+        r = sd_bus_message_read(m, "sb", &name, &interactive);
+        if (r < 0)
+                return r;
+
+        name = empty_to_null(name);
+
+        context_read_machine_info(c);
+
+        if (streq_ptr(name, c->data[prop]))
+                return sd_bus_reply_method_return(m, NULL);
+
+        if (!isempty(name)) {
+                /* The icon name might ultimately be used as file
+                 * name, so better be safe than sorry */
+
+                if (prop == PROP_ICON_NAME && !filename_is_valid(name))
+                        return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid icon name '%s'", name);
+                if (prop == PROP_PRETTY_HOSTNAME && string_has_cc(name, NULL))
+                        return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid pretty hostname '%s'", name);
+                if (prop == PROP_CHASSIS && !valid_chassis(name))
+                        return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid chassis '%s'", name);
+                if (prop == PROP_DEPLOYMENT && !valid_deployment(name))
+                        return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid deployment '%s'", name);
+                if (prop == PROP_LOCATION && string_has_cc(name, NULL))
+                        return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid location '%s'", name);
+        }
+
+        /* Since the pretty hostname should always be changed at the
+         * same time as the static one, use the same policy action for
+         * both... */
+
+        r = bus_verify_polkit_async(
+                        m,
+                        CAP_SYS_ADMIN,
+                        prop == PROP_PRETTY_HOSTNAME ? "org.freedesktop.hostname1.set-static-hostname" : "org.freedesktop.hostname1.set-machine-info",
+                        NULL,
+                        interactive,
+                        UID_INVALID,
+                        &c->polkit_registry,
+                        error);
+        if (r < 0)
+                return r;
+        if (r == 0)
+                return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
+
+        r = free_and_strdup_warn(&c->data[prop], name);
+        if (r < 0)
+                return r;
+
+        r = context_write_data_machine_info(c);
+        if (r < 0) {
+                log_error_errno(r, "Failed to write machine info: %m");
+                if (ERRNO_IS_PRIVILEGE(r))
+                        return sd_bus_error_set(error, BUS_ERROR_FILE_IS_PROTECTED, "Not allowed to update /etc/machine-info.");
+                if (r == -EROFS)
+                        return sd_bus_error_set(error, BUS_ERROR_READ_ONLY_FILESYSTEM, "/etc/machine-info is in a read-only filesystem.");
+                return sd_bus_error_set_errnof(error, r, "Failed to write machine info: %m");
+        }
+
+        log_info("Changed %s to '%s'",
+                 prop == PROP_PRETTY_HOSTNAME ? "pretty hostname" :
+                 prop == PROP_DEPLOYMENT ? "deployment" :
+                 prop == PROP_LOCATION ? "location" :
+                 prop == PROP_CHASSIS ? "chassis" : "icon name", strna(c->data[prop]));
+
+        (void) sd_bus_emit_properties_changed(
+                        sd_bus_message_get_bus(m),
+                        "/org/freedesktop/hostname1",
+                        "org.freedesktop.hostname1",
+                        prop == PROP_PRETTY_HOSTNAME ? "PrettyHostname" :
+                        prop == PROP_DEPLOYMENT ? "Deployment" :
+                        prop == PROP_LOCATION ? "Location" :
+                        prop == PROP_CHASSIS ? "Chassis" : "IconName" , NULL);
+
+        return sd_bus_reply_method_return(m, NULL);
+}
+
+static int method_set_pretty_hostname(sd_bus_message *m, void *userdata, sd_bus_error *error) {
+        return set_machine_info(userdata, m, PROP_PRETTY_HOSTNAME, method_set_pretty_hostname, error);
+}
+
+static int method_set_icon_name(sd_bus_message *m, void *userdata, sd_bus_error *error) {
+        return set_machine_info(userdata, m, PROP_ICON_NAME, method_set_icon_name, error);
+}
+
+static int method_set_chassis(sd_bus_message *m, void *userdata, sd_bus_error *error) {
+        return set_machine_info(userdata, m, PROP_CHASSIS, method_set_chassis, error);
+}
+
+static int method_set_deployment(sd_bus_message *m, void *userdata, sd_bus_error *error) {
+        return set_machine_info(userdata, m, PROP_DEPLOYMENT, method_set_deployment, error);
+}
+
+static int method_set_location(sd_bus_message *m, void *userdata, sd_bus_error *error) {
+        return set_machine_info(userdata, m, PROP_LOCATION, method_set_location, error);
+}
+
+static int method_get_product_uuid(sd_bus_message *m, void *userdata, sd_bus_error *error) {
+        _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
+        Context *c = ASSERT_PTR(userdata);
+        int interactive, r;
+        sd_id128_t uuid;
+
+        assert(m);
+
+        r = sd_bus_message_read(m, "b", &interactive);
+        if (r < 0)
+                return r;
+
+        r = bus_verify_polkit_async(
+                        m,
+                        CAP_SYS_ADMIN,
+                        "org.freedesktop.hostname1.get-product-uuid",
+                        NULL,
+                        interactive,
+                        UID_INVALID,
+                        &c->polkit_registry,
+                        error);
+        if (r < 0)
+                return r;
+        if (r == 0)
+                return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
+
+        r = id128_get_product(&uuid);
+        if (r < 0) {
+                if (r == -EADDRNOTAVAIL)
+                        log_debug_errno(r, "DMI product UUID is all 0x00 or all 0xFF, ignoring.");
+                else
+                        log_full_errno(r == -ENOENT ? LOG_DEBUG : LOG_WARNING, r,
+                                       "Failed to read product UUID, ignoring: %m");
+
+                return sd_bus_error_set(error, BUS_ERROR_NO_PRODUCT_UUID,
+                                        "Failed to read product UUID from firmware.");
+        }
+
+        r = sd_bus_message_new_method_return(m, &reply);
+        if (r < 0)
+                return r;
+
+        r = sd_bus_message_append_array(reply, 'y', uuid.bytes, sizeof(uuid.bytes));
+        if (r < 0)
+                return r;
+
+        return sd_bus_send(NULL, reply, NULL);
+}
+
+static int method_get_hardware_serial(sd_bus_message *m, void *userdata, sd_bus_error *error) {
+        _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
+        _cleanup_free_ char *serial = NULL;
+        Context *c = ASSERT_PTR(userdata);
+        int r;
+
+        assert(m);
+
+        r = bus_verify_polkit_async(
+                        m,
+                        CAP_SYS_ADMIN,
+                        "org.freedesktop.hostname1.get-hardware-serial",
+                        NULL,
+                        false,
+                        UID_INVALID,
+                        &c->polkit_registry,
+                        error);
+        if (r < 0)
+                return r;
+        if (r == 0)
+                return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
+
+        r = get_hardware_serial(&serial);
+        if (r < 0)
+                return r;
+
+        r = sd_bus_message_new_method_return(m, &reply);
+        if (r < 0)
+                return r;
+
+        r = sd_bus_message_append(reply, "s", serial);
+        if (r < 0)
+                return r;
+
+        return sd_bus_send(NULL, reply, NULL);
+}
+
+static int method_describe(sd_bus_message *m, void *userdata, sd_bus_error *error) {
+        _cleanup_free_ char *hn = NULL, *dhn = NULL, *in = NULL, *text = NULL,
+                *chassis = NULL, *vendor = NULL, *model = NULL, *serial = NULL, *firmware_version = NULL,
+                *firmware_vendor = NULL;
+        usec_t firmware_date = USEC_INFINITY, eol = USEC_INFINITY;
+        _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
+        _cleanup_(json_variant_unrefp) JsonVariant *v = NULL;
+        sd_id128_t machine_id, boot_id, product_uuid = SD_ID128_NULL;
+        Context *c = ASSERT_PTR(userdata);
+        bool privileged;
+        struct utsname u;
+        int r;
+
+        assert(m);
+
+        r = bus_verify_polkit_async(
+                        m,
+                        CAP_SYS_ADMIN,
+                        "org.freedesktop.hostname1.get-description",
+                        NULL,
+                        false,
+                        UID_INVALID,
+                        &c->polkit_registry,
+                        error);
+        if (r == 0)
+                return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
+
+        /* We ignore all authentication errors here, since most data is unprivileged, the one exception being
+         * the product ID which we'll check explicitly. */
+        privileged = r > 0;
+
+        context_read_etc_hostname(c);
+        context_read_machine_info(c);
+        context_read_os_release(c);
+        context_determine_hostname_source(c);
+
+        r = gethostname_strict(&hn);
+        if (r < 0) {
+                if (r != -ENXIO)
+                        return log_error_errno(r, "Failed to read local host name: %m");
+
+                hn = get_default_hostname();
+                if (!hn)
+                        return log_oom();
+        }
+
+        dhn = get_default_hostname();
+        if (!dhn)
+                return log_oom();
+
+        if (isempty(c->data[PROP_ICON_NAME]))
+                in = context_fallback_icon_name(c);
+
+        chassis = context_get_chassis(c);
+
+        assert_se(uname(&u) >= 0);
+
+        if (isempty(c->data[PROP_HARDWARE_VENDOR]))
+                (void) get_hardware_vendor(&vendor);
+        if (isempty(c->data[PROP_HARDWARE_MODEL]))
+                (void) get_hardware_model(&model);
+
+        if (privileged) {
+                /* The product UUID and hardware serial is only available to privileged clients */
+                (void) id128_get_product(&product_uuid);
+                (void) get_hardware_serial(&serial);
+        }
+        (void) get_firmware_version(&firmware_version);
+        (void) get_firmware_vendor(&firmware_vendor);
+        (void) get_firmware_date(&firmware_date);
+
+        if (c->data[PROP_OS_SUPPORT_END])
+                (void) os_release_support_ended(c->data[PROP_OS_SUPPORT_END], /* quiet= */ false, &eol);
+
+        r = sd_id128_get_machine(&machine_id);
+        if (r < 0)
+                return log_error_errno(r, "Failed to get machine ID: %m");
+
+        r = sd_id128_get_boot(&boot_id);
+        if (r < 0)
+                return log_error_errno(r, "Failed to get boot ID: %m");
+
+        r = json_build(&v, JSON_BUILD_OBJECT(
+                                       JSON_BUILD_PAIR("Hostname", JSON_BUILD_STRING(hn)),
+                                       JSON_BUILD_PAIR("StaticHostname", JSON_BUILD_STRING(c->data[PROP_STATIC_HOSTNAME])),
+                                       JSON_BUILD_PAIR("PrettyHostname", JSON_BUILD_STRING(c->data[PROP_PRETTY_HOSTNAME])),
+                                       JSON_BUILD_PAIR("DefaultHostname", JSON_BUILD_STRING(dhn)),
+                                       JSON_BUILD_PAIR("HostnameSource", JSON_BUILD_STRING(hostname_source_to_string(c->hostname_source))),
+                                       JSON_BUILD_PAIR("IconName", JSON_BUILD_STRING(in ?: c->data[PROP_ICON_NAME])),
+                                       JSON_BUILD_PAIR("Chassis", JSON_BUILD_STRING(chassis)),
+                                       JSON_BUILD_PAIR("Deployment", JSON_BUILD_STRING(c->data[PROP_DEPLOYMENT])),
+                                       JSON_BUILD_PAIR("Location", JSON_BUILD_STRING(c->data[PROP_LOCATION])),
+                                       JSON_BUILD_PAIR("KernelName", JSON_BUILD_STRING(u.sysname)),
+                                       JSON_BUILD_PAIR("KernelRelease", JSON_BUILD_STRING(u.release)),
+                                       JSON_BUILD_PAIR("KernelVersion", JSON_BUILD_STRING(u.version)),
+                                       JSON_BUILD_PAIR("OperatingSystemPrettyName", JSON_BUILD_STRING(c->data[PROP_OS_PRETTY_NAME])),
+                                       JSON_BUILD_PAIR("OperatingSystemCPEName", JSON_BUILD_STRING(c->data[PROP_OS_CPE_NAME])),
+                                       JSON_BUILD_PAIR("OperatingSystemHomeURL", JSON_BUILD_STRING(c->data[PROP_OS_HOME_URL])),
+                                       JSON_BUILD_PAIR_FINITE_USEC("OperatingSystemSupportEnd", eol),
+                                       JSON_BUILD_PAIR("HardwareVendor", JSON_BUILD_STRING(vendor ?: c->data[PROP_HARDWARE_VENDOR])),
+                                       JSON_BUILD_PAIR("HardwareModel", JSON_BUILD_STRING(model ?: c->data[PROP_HARDWARE_MODEL])),
+                                       JSON_BUILD_PAIR("HardwareSerial", JSON_BUILD_STRING(serial)),
+                                       JSON_BUILD_PAIR("FirmwareVersion", JSON_BUILD_STRING(firmware_version)),
+                                       JSON_BUILD_PAIR("FirmwareVendor", JSON_BUILD_STRING(firmware_vendor)),
+                                       JSON_BUILD_PAIR_FINITE_USEC("FirmwareDate", firmware_date),
+                                       JSON_BUILD_PAIR_ID128("MachineID", machine_id),
+                                       JSON_BUILD_PAIR_ID128("BootID", boot_id),
+                                       JSON_BUILD_PAIR_CONDITION(!sd_id128_is_null(product_uuid), "ProductUUID", JSON_BUILD_ID128(product_uuid)),
+                                       JSON_BUILD_PAIR_CONDITION(sd_id128_is_null(product_uuid), "ProductUUID", JSON_BUILD_NULL)));
+
+        if (r < 0)
+                return log_error_errno(r, "Failed to build JSON data: %m");
+
+        r = json_variant_format(v, 0, &text);
+        if (r < 0)
+                return log_error_errno(r, "Failed to format JSON data: %m");
+
+        r = sd_bus_message_new_method_return(m, &reply);
+        if (r < 0)
+                return r;
+
+        r = sd_bus_message_append(reply, "s", text);
+        if (r < 0)
+                return r;
+
+        return sd_bus_send(NULL, reply, NULL);
+}
+
+static const sd_bus_vtable hostname_vtable[] = {
+        SD_BUS_VTABLE_START(0),
+        SD_BUS_PROPERTY("Hostname", "s", property_get_hostname, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
+        SD_BUS_PROPERTY("StaticHostname", "s", property_get_static_hostname, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
+        SD_BUS_PROPERTY("PrettyHostname", "s", property_get_machine_info_field, offsetof(Context, data) + sizeof(char*) * PROP_PRETTY_HOSTNAME, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
+        SD_BUS_PROPERTY("DefaultHostname", "s", property_get_default_hostname, 0, SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("HostnameSource", "s", property_get_hostname_source, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
+        SD_BUS_PROPERTY("IconName", "s", property_get_icon_name, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
+        SD_BUS_PROPERTY("Chassis", "s", property_get_chassis, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
+        SD_BUS_PROPERTY("Deployment", "s", property_get_machine_info_field, offsetof(Context, data) + sizeof(char*) * PROP_DEPLOYMENT, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
+        SD_BUS_PROPERTY("Location", "s", property_get_machine_info_field, offsetof(Context, data) + sizeof(char*) * PROP_LOCATION, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
+        SD_BUS_PROPERTY("KernelName", "s", property_get_uname_field, offsetof(struct utsname, sysname), SD_BUS_VTABLE_ABSOLUTE_OFFSET|SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("KernelRelease", "s", property_get_uname_field, offsetof(struct utsname, release), SD_BUS_VTABLE_ABSOLUTE_OFFSET|SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("KernelVersion", "s", property_get_uname_field, offsetof(struct utsname, version), SD_BUS_VTABLE_ABSOLUTE_OFFSET|SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("OperatingSystemPrettyName", "s", property_get_os_release_field, offsetof(Context, data) + sizeof(char*) * PROP_OS_PRETTY_NAME, SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("OperatingSystemCPEName", "s", property_get_os_release_field, offsetof(Context, data) + sizeof(char*) * PROP_OS_CPE_NAME, SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("OperatingSystemSupportEnd", "t", property_get_os_support_end, 0, SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("HomeURL", "s", property_get_os_release_field, offsetof(Context, data) + sizeof(char*) * PROP_OS_HOME_URL, SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("HardwareVendor", "s", property_get_hardware_vendor, 0, SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("HardwareModel", "s", property_get_hardware_model, 0, SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("FirmwareVersion", "s", property_get_firmware_version, 0, SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("FirmwareVendor", "s", property_get_firmware_vendor, 0, SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("FirmwareDate", "t", property_get_firmware_date, 0, SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("MachineID", "ay", property_get_machine_id, 0, SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("BootID", "ay", property_get_boot_id, 0, SD_BUS_VTABLE_PROPERTY_CONST),
+
+        SD_BUS_METHOD_WITH_ARGS("SetHostname",
+                                SD_BUS_ARGS("s", hostname, "b", interactive),
+                                SD_BUS_NO_RESULT,
+                                method_set_hostname,
+                                SD_BUS_VTABLE_UNPRIVILEGED),
+        SD_BUS_METHOD_WITH_ARGS("SetStaticHostname",
+                                SD_BUS_ARGS("s", hostname, "b", interactive),
+                                SD_BUS_NO_RESULT,
+                                method_set_static_hostname,
+                                SD_BUS_VTABLE_UNPRIVILEGED),
+        SD_BUS_METHOD_WITH_ARGS("SetPrettyHostname",
+                                SD_BUS_ARGS("s", hostname, "b", interactive),
+                                SD_BUS_NO_RESULT,
+                                method_set_pretty_hostname,
+                                SD_BUS_VTABLE_UNPRIVILEGED),
+        SD_BUS_METHOD_WITH_ARGS("SetIconName",
+                                SD_BUS_ARGS("s", icon, "b", interactive),
+                                SD_BUS_NO_RESULT,
+                                method_set_icon_name,
+                                SD_BUS_VTABLE_UNPRIVILEGED),
+        SD_BUS_METHOD_WITH_ARGS("SetChassis",
+                                SD_BUS_ARGS("s", chassis, "b", interactive),
+                                SD_BUS_NO_RESULT,
+                                method_set_chassis,
+                                SD_BUS_VTABLE_UNPRIVILEGED),
+        SD_BUS_METHOD_WITH_ARGS("SetDeployment",
+                                SD_BUS_ARGS("s", deployment, "b", interactive),
+                                SD_BUS_NO_RESULT,
+                                method_set_deployment,
+                                SD_BUS_VTABLE_UNPRIVILEGED),
+        SD_BUS_METHOD_WITH_ARGS("SetLocation",
+                                SD_BUS_ARGS("s", location, "b", interactive),
+                                SD_BUS_NO_RESULT,
+                                method_set_location,
+                                SD_BUS_VTABLE_UNPRIVILEGED),
+        SD_BUS_METHOD_WITH_ARGS("GetProductUUID",
+                                SD_BUS_ARGS("b", interactive),
+                                SD_BUS_RESULT("ay", uuid),
+                                method_get_product_uuid,
+                                SD_BUS_VTABLE_UNPRIVILEGED),
+        SD_BUS_METHOD_WITH_ARGS("GetHardwareSerial",
+                                SD_BUS_NO_ARGS,
+                                SD_BUS_RESULT("s", serial),
+                                method_get_hardware_serial,
+                                SD_BUS_VTABLE_UNPRIVILEGED),
+        SD_BUS_METHOD_WITH_ARGS("Describe",
+                                SD_BUS_NO_ARGS,
+                                SD_BUS_RESULT("s", json),
+                                method_describe,
+                                SD_BUS_VTABLE_UNPRIVILEGED),
+
+        SD_BUS_VTABLE_END,
+};
+
+static const BusObjectImplementation manager_object = {
+        "/org/freedesktop/hostname1",
+        "org.freedesktop.hostname1",
+        .vtables = BUS_VTABLES(hostname_vtable),
+};
+
+static int connect_bus(Context *c, sd_event *event, sd_bus **ret) {
+        _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
+        int r;
+
+        assert(c);
+        assert(event);
+        assert(ret);
+
+        r = sd_bus_default_system(&bus);
+        if (r < 0)
+                return log_error_errno(r, "Failed to get system bus connection: %m");
+
+        r = bus_add_implementation(bus, &manager_object, c);
+        if (r < 0)
+                return r;
+
+        r = bus_log_control_api_register(bus);
+        if (r < 0)
+                return r;
+
+        r = sd_bus_request_name_async(bus, NULL, "org.freedesktop.hostname1", 0, NULL, NULL);
+        if (r < 0)
+                return log_error_errno(r, "Failed to request name: %m");
+
+        r = sd_bus_attach_event(bus, event, 0);
+        if (r < 0)
+                return log_error_errno(r, "Failed to attach bus to event loop: %m");
+
+        *ret = TAKE_PTR(bus);
+        return 0;
+}
+
+static int run(int argc, char *argv[]) {
+        _cleanup_(context_destroy) Context context = {
+                .hostname_source = _HOSTNAME_INVALID, /* appropriate value will be set later */
+        };
+        _cleanup_(sd_event_unrefp) sd_event *event = NULL;
+        _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
+        int r;
+
+        log_setup();
+
+        r = service_parse_argv("systemd-hostnamed.service",
+                               "Manage the system hostname and related metadata.",
+                               BUS_IMPLEMENTATIONS(&manager_object,
+                                                   &log_control_object),
+                               argc, argv);
+        if (r <= 0)
+                return r;
+
+        umask(0022);
+
+        r = mac_init();
+        if (r < 0)
+                return r;
+
+        assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, -1) >= 0);
+
+        r = sd_event_default(&event);
+        if (r < 0)
+                return log_error_errno(r, "Failed to allocate event loop: %m");
+
+        (void) sd_event_set_watchdog(event, true);
+
+        r = sd_event_add_signal(event, NULL, SIGINT, NULL, NULL);
+        if (r < 0)
+                return log_error_errno(r, "Failed to install SIGINT handler: %m");
+
+        r = sd_event_add_signal(event, NULL, SIGTERM, NULL, NULL);
+        if (r < 0)
+                return log_error_errno(r, "Failed to install SIGTERM handler: %m");
+
+        r = connect_bus(&context, event, &bus);
+        if (r < 0)
+                return r;
+
+        r = bus_event_loop_with_idle(event, bus, "org.freedesktop.hostname1", DEFAULT_EXIT_USEC, NULL, NULL);
+        if (r < 0)
+                return log_error_errno(r, "Failed to run event loop: %m");
+
+        return 0;
+}
+
+DEFINE_MAIN_FUNCTION(run);
diff --git a/src/hostname/meson.build b/src/hostname/meson.build
new file mode 100644
index 0000000..27c9b84
--- /dev/null
+++ b/src/hostname/meson.build
@@ -0,0 +1,25 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
+executables += [
+        libexec_template + {
+                'name' : 'systemd-hostnamed',
+                'dbus' : true,
+                'conditions' : ['ENABLE_HOSTNAMED'],
+                'sources' : files('hostnamed.c'),
+        },
+        executable_template + {
+                'name' : 'hostnamectl',
+                'public' : true,
+                'conditions' : ['ENABLE_HOSTNAMED'],
+                'sources' : files('hostnamectl.c'),
+        },
+]
+
+if conf.get('ENABLE_HOSTNAMED') == 1
+        install_data('org.freedesktop.hostname1.conf',
+                     install_dir : dbuspolicydir)
+        install_data('org.freedesktop.hostname1.service',
+                     install_dir : dbussystemservicedir)
+        install_data('org.freedesktop.hostname1.policy',
+                     install_dir : polkitpolicydir)
+endif
diff --git a/src/hostname/org.freedesktop.hostname1.conf b/src/hostname/org.freedesktop.hostname1.conf
new file mode 100644
index 0000000..5b70625
--- /dev/null
+++ b/src/hostname/org.freedesktop.hostname1.conf
@@ -0,0 +1,29 @@
+<?xml version="1.0"?> <!--*-nxml-*-->
+<!DOCTYPE busconfig PUBLIC "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN"
+        "https://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd">
+
+<!--
+  SPDX-License-Identifier: LGPL-2.1-or-later
+
+  This file is part of systemd.
+
+  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.
+-->
+
+<busconfig>
+
+        <policy user="root">
+                <allow own="org.freedesktop.hostname1"/>
+                <allow send_destination="org.freedesktop.hostname1"/>
+                <allow receive_sender="org.freedesktop.hostname1"/>
+        </policy>
+
+        <policy context="default">
+                <allow send_destination="org.freedesktop.hostname1"/>
+                <allow receive_sender="org.freedesktop.hostname1"/>
+        </policy>
+
+</busconfig>
diff --git a/src/hostname/org.freedesktop.hostname1.policy b/src/hostname/org.freedesktop.hostname1.policy
new file mode 100644
index 0000000..bfc36d1
--- /dev/null
+++ b/src/hostname/org.freedesktop.hostname1.policy
@@ -0,0 +1,80 @@
+<?xml version="1.0" encoding="UTF-8"?> <!--*-nxml-*-->
+<!DOCTYPE policyconfig PUBLIC "-//freedesktop//DTD PolicyKit Policy Configuration 1.0//EN"
+        "https://www.freedesktop.org/standards/PolicyKit/1/policyconfig.dtd">
+
+<!--
+  SPDX-License-Identifier: LGPL-2.1-or-later
+
+  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.
+-->
+
+<policyconfig>
+
+        <vendor>The systemd Project</vendor>
+        <vendor_url>https://systemd.io</vendor_url>
+
+        <action id="org.freedesktop.hostname1.set-hostname">
+                <description gettext-domain="systemd">Set hostname</description>
+                <message gettext-domain="systemd">Authentication is required to set the local hostname.</message>
+                <defaults>
+                        <allow_any>auth_admin_keep</allow_any>
+                        <allow_inactive>auth_admin_keep</allow_inactive>
+                        <allow_active>auth_admin_keep</allow_active>
+                </defaults>
+        </action>
+
+        <action id="org.freedesktop.hostname1.set-static-hostname">
+                <description gettext-domain="systemd">Set static hostname</description>
+                <message gettext-domain="systemd">Authentication is required to set the statically configured local hostname, as well as the pretty hostname.</message>
+                <defaults>
+                        <allow_any>auth_admin_keep</allow_any>
+                        <allow_inactive>auth_admin_keep</allow_inactive>
+                        <allow_active>auth_admin_keep</allow_active>
+                </defaults>
+                <annotate key="org.freedesktop.policykit.imply">org.freedesktop.hostname1.set-hostname org.freedesktop.hostname1.set-machine-info</annotate>
+        </action>
+
+        <action id="org.freedesktop.hostname1.set-machine-info">
+                <description gettext-domain="systemd">Set machine information</description>
+                <message gettext-domain="systemd">Authentication is required to set local machine information.</message>
+                <defaults>
+                        <allow_any>auth_admin_keep</allow_any>
+                        <allow_inactive>auth_admin_keep</allow_inactive>
+                        <allow_active>auth_admin_keep</allow_active>
+                </defaults>
+        </action>
+
+        <action id="org.freedesktop.hostname1.get-product-uuid">
+                <description gettext-domain="systemd">Get product UUID</description>
+                <message gettext-domain="systemd">Authentication is required to get product UUID.</message>
+                <defaults>
+                        <allow_any>auth_admin_keep</allow_any>
+                        <allow_inactive>auth_admin_keep</allow_inactive>
+                        <allow_active>auth_admin_keep</allow_active>
+                </defaults>
+        </action>
+
+        <action id="org.freedesktop.hostname1.get-hardware-serial">
+                <description gettext-domain="systemd">Get hardware serial number</description>
+                <message gettext-domain="systemd">Authentication is required to get hardware serial number.</message>
+                <defaults>
+                        <allow_any>auth_admin_keep</allow_any>
+                        <allow_inactive>auth_admin_keep</allow_inactive>
+                        <allow_active>auth_admin_keep</allow_active>
+                </defaults>
+        </action>
+
+        <action id="org.freedesktop.hostname1.get-description">
+                <description gettext-domain="systemd">Get system description</description>
+                <message gettext-domain="systemd">Authentication is required to get system description.</message>
+                <defaults>
+                        <allow_any>auth_admin_keep</allow_any>
+                        <allow_inactive>auth_admin_keep</allow_inactive>
+                        <allow_active>auth_admin_keep</allow_active>
+                </defaults>
+        </action>
+
+</policyconfig>
diff --git a/src/hostname/org.freedesktop.hostname1.service b/src/hostname/org.freedesktop.hostname1.service
new file mode 100644
index 0000000..1d6b9c8
--- /dev/null
+++ b/src/hostname/org.freedesktop.hostname1.service
@@ -0,0 +1,12 @@
+#  SPDX-License-Identifier: LGPL-2.1-or-later
+#
+#  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.
+
+[D-BUS Service]
+Name=org.freedesktop.hostname1
+Exec=/bin/false
+User=root
+SystemdService=dbus-org.freedesktop.hostname1.service