Adding upstream version 252.22.upstream/252.22

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

1 files changed, 1448 insertions, 0 deletions

diff --git a/src/hostname/hostnamed.c b/src/hostname/hostnamed.c
new file mode 100644
index 0000000..0c79834
--- /dev/null
+++ b/src/hostname/hostnamed.c
@@ -0,0 +1,1448 @@
+/* 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 "def.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 "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_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) {
+        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));
+
+        r = parse_os_release(NULL,
+                             "PRETTY_NAME", &c->data[PROP_OS_PRETTY_NAME],
+                             "CPE_NAME", &c->data[PROP_OS_CPE_NAME],
+                             "HOME_URL", &c->data[PROP_OS_HOME_URL]);
+        if (r < 0 && r != -ENOENT)
+                log_warning_errno(r, "Failed to read os-release file, ignoring: %m");
+
+        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 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("/etc/machine-info", 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_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_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 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;
+        _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
+        _cleanup_(json_variant_unrefp) JsonVariant *v = NULL;
+        sd_id128_t 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);
+
+        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("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_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("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_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_selinux_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);