Adding upstream version 241.upstream/241upstream

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

1 files changed, 763 insertions, 0 deletions

diff --git a/src/hostname/hostnamed.c b/src/hostname/hostnamed.c
new file mode 100644
index 0000000..7777450
--- /dev/null
+++ b/src/hostname/hostnamed.c
@@ -0,0 +1,763 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
+
+#include <errno.h>
+#include <string.h>
+#include <sys/utsname.h>
+#include <unistd.h>
+
+#include "alloc-util.h"
+#include "bus-common-errors.h"
+#include "bus-util.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-util.h"
+#include "id128-util.h"
+#include "main-func.h"
+#include "missing_capability.h"
+#include "nscd-flush.h"
+#include "os-util.h"
+#include "parse-util.h"
+#include "path-util.h"
+#include "selinux-util.h"
+#include "signal-util.h"
+#include "strv.h"
+#include "user-util.h"
+#include "util.h"
+#include "virt.h"
+
+#define VALID_DEPLOYMENT_CHARS (DIGITS LETTERS "-.:")
+
+enum {
+        PROP_HOSTNAME,
+        PROP_STATIC_HOSTNAME,
+        PROP_PRETTY_HOSTNAME,
+        PROP_ICON_NAME,
+        PROP_CHASSIS,
+        PROP_DEPLOYMENT,
+        PROP_LOCATION,
+        PROP_KERNEL_NAME,
+        PROP_KERNEL_RELEASE,
+        PROP_KERNEL_VERSION,
+        PROP_OS_PRETTY_NAME,
+        PROP_OS_CPE_NAME,
+        PROP_HOME_URL,
+        _PROP_MAX
+};
+
+typedef struct Context {
+        char *data[_PROP_MAX];
+        Hashmap *polkit_registry;
+        sd_id128_t uuid;
+        bool has_uuid;
+} Context;
+
+static void context_reset(Context *c) {
+        int p;
+
+        assert(c);
+
+        for (p = 0; p < _PROP_MAX; p++)
+                c->data[p] = mfree(c->data[p]);
+}
+
+static void context_clear(Context *c) {
+        assert(c);
+
+        context_reset(c);
+        bus_verify_polkit_async_registry_free(c->polkit_registry);
+}
+
+static int context_read_data(Context *c) {
+        int r;
+        struct utsname u;
+
+        assert(c);
+
+        context_reset(c);
+
+        assert_se(uname(&u) >= 0);
+        c->data[PROP_KERNEL_NAME] = strdup(u.sysname);
+        c->data[PROP_KERNEL_RELEASE] = strdup(u.release);
+        c->data[PROP_KERNEL_VERSION] = strdup(u.version);
+        if (!c->data[PROP_KERNEL_NAME] || !c->data[PROP_KERNEL_RELEASE] ||
+            !c->data[PROP_KERNEL_VERSION])
+                return -ENOMEM;
+
+        c->data[PROP_HOSTNAME] = gethostname_malloc();
+        if (!c->data[PROP_HOSTNAME])
+                return -ENOMEM;
+
+        r = read_etc_hostname(NULL, &c->data[PROP_STATIC_HOSTNAME]);
+        if (r < 0 && r != -ENOENT)
+                return r;
+
+        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]);
+        if (r < 0 && r != -ENOENT)
+                return r;
+
+        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_HOME_URL],
+                             NULL);
+        if (r < 0 && r != -ENOENT)
+                return r;
+
+        r = id128_read("/sys/class/dmi/id/product_uuid", ID128_UUID, &c->uuid);
+        if (r < 0)
+                log_full_errno(r == -ENOENT ? LOG_DEBUG : LOG_WARNING, r,
+                               "Failed to read product UUID, ignoring: %m");
+        else if (sd_id128_is_null(c->uuid) || sd_id128_is_allf(c->uuid))
+                log_debug("DMI product UUID " SD_ID128_FORMAT_STR " is all 0x00 or all 0xFF, ignoring.", SD_ID128_FORMAT_VAL(c->uuid));
+        else
+                c->has_uuid = true;
+
+        return 0;
+}
+
+static bool valid_chassis(const char *chassis) {
+        assert(chassis);
+
+        return nulstr_contains(
+                        "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) {
+        char *type;
+        unsigned t;
+        int v, r;
+
+        v = detect_virtualization();
+        if (VIRTUALIZATION_IS_VM(v))
+                return "vm";
+        if (VIRTUALIZATION_IS_CONTAINER(v))
+                return "container";
+
+        r = read_one_line_file("/sys/class/dmi/id/chassis_type", &type);
+        if (r < 0)
+                goto try_acpi;
+
+        r = safe_atou(type, &t);
+        free(type);
+        if (r < 0)
+                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 3.0 section 7.4.1 for details about the values listed here:
+
+           https://www.dmtf.org/sites/default/files/standards/documents/DSP0134_3.0.0.pdf
+         */
+
+        switch (t) {
+
+        case 0x3: /* Desktop */
+        case 0x4: /* Low Profile Desktop */
+        case 0x6: /* Mini Tower */
+        case 0x7: /* Tower */
+                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";
+        }
+
+try_acpi:
+        r = read_one_line_file("/sys/firmware/acpi/pm_profile", &type);
+        if (r < 0)
+                return NULL;
+
+        r = safe_atou(type, &t);
+        free(type);
+        if (r < 0)
+                return NULL;
+
+        /* 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";
+        }
+
+        return NULL;
+}
+
+static char* context_fallback_icon_name(Context *c) {
+        const char *chassis;
+
+        assert(c);
+
+        if (!isempty(c->data[PROP_CHASSIS]))
+                return strappend("computer-", c->data[PROP_CHASSIS]);
+
+        chassis = fallback_chassis();
+        if (chassis)
+                return strappend("computer-", chassis);
+
+        return strdup("computer");
+}
+
+static bool hostname_is_useful(const char *hn) {
+        return !isempty(hn) && !is_localhost(hn);
+}
+
+static int context_update_kernel_hostname(Context *c) {
+        const char *static_hn;
+        const char *hn;
+
+        assert(c);
+
+        static_hn = c->data[PROP_STATIC_HOSTNAME];
+
+        /* /etc/hostname with something other than "localhost"
+         * has the highest preference ... */
+        if (hostname_is_useful(static_hn))
+                hn = static_hn;
+
+        /* ... the transient host name, (ie: DHCP) comes next ... */
+        else if (!isempty(c->data[PROP_HOSTNAME]))
+                hn = c->data[PROP_HOSTNAME];
+
+        /* ... fallback to static "localhost.*" ignored above ... */
+        else if (!isempty(static_hn))
+                hn = static_hn;
+
+        /* ... and the ultimate fallback */
+        else
+                hn = FALLBACK_HOSTNAME;
+
+        if (sethostname_idempotent(hn) < 0)
+                return -errno;
+
+        (void) nscd_flush_cache(STRV_MAKE("hosts"));
+
+        return 0;
+}
+
+static int context_write_data_static_hostname(Context *c) {
+
+        assert(c);
+
+        if (isempty(c->data[PROP_STATIC_HOSTNAME])) {
+
+                if (unlink("/etc/hostname") < 0)
+                        return errno == ENOENT ? 0 : -errno;
+
+                return 0;
+        }
+        return write_string_file_atomic_label("/etc/hostname", c->data[PROP_STATIC_HOSTNAME]);
+}
+
+static int context_write_data_machine_info(Context *c) {
+
+        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, p;
+
+        assert(c);
+
+        r = load_env_file(NULL, "/etc/machine-info", &l);
+        if (r < 0 && r != -ENOENT)
+                return r;
+
+        for (p = PROP_PRETTY_HOSTNAME; p <= PROP_LOCATION; p++) {
+                _cleanup_free_ char *t = NULL;
+                char **u;
+
+                assert(name[p]);
+
+                if (isempty(c->data[p]))  {
+                        strv_env_unset(l, name[p]);
+                        continue;
+                }
+
+                t = strjoin(name[p], "=", c->data[p]);
+                if (!t)
+                        return -ENOMEM;
+
+                u = strv_env_set(l, t);
+                if (!u)
+                        return -ENOMEM;
+
+                strv_free_and_replace(l, u);
+        }
+
+        if (strv_isempty(l)) {
+                if (unlink("/etc/machine-info") < 0)
+                        return errno == ENOENT ? 0 : -errno;
+
+                return 0;
+        }
+
+        return write_env_file_label("/etc/machine-info", l);
+}
+
+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;
+
+        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) {
+
+        Context *c = userdata;
+        const char *name;
+
+        if (isempty(c->data[PROP_CHASSIS]))
+                name = fallback_chassis();
+        else
+                name = c->data[PROP_CHASSIS];
+
+        return sd_bus_message_append(reply, "s", name);
+}
+
+static int method_set_hostname(sd_bus_message *m, void *userdata, sd_bus_error *error) {
+        Context *c = userdata;
+        const char *name;
+        int interactive;
+        int r;
+
+        assert(m);
+        assert(c);
+
+        r = sd_bus_message_read(m, "sb", &name, &interactive);
+        if (r < 0)
+                return r;
+
+        if (isempty(name))
+                name = c->data[PROP_STATIC_HOSTNAME];
+
+        if (isempty(name))
+                name = FALLBACK_HOSTNAME;
+
+        if (!hostname_is_valid(name, false))
+                return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid hostname '%s'", name);
+
+        if (streq_ptr(name, c->data[PROP_HOSTNAME]))
+                return sd_bus_reply_method_return(m, NULL);
+
+        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 = free_and_strdup(&c->data[PROP_HOSTNAME], name);
+        if (r < 0)
+                return r;
+
+        r = context_update_kernel_hostname(c);
+        if (r < 0) {
+                log_error_errno(r, "Failed to set host name: %m");
+                return sd_bus_error_set_errnof(error, r, "Failed to set hostname: %m");
+        }
+
+        log_info("Changed host name to '%s'", strna(c->data[PROP_HOSTNAME]));
+
+        (void) sd_bus_emit_properties_changed(sd_bus_message_get_bus(m), "/org/freedesktop/hostname1", "org.freedesktop.hostname1", "Hostname", 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 = userdata;
+        const char *name;
+        int interactive;
+        int r;
+
+        assert(m);
+        assert(c);
+
+        r = sd_bus_message_read(m, "sb", &name, &interactive);
+        if (r < 0)
+                return r;
+
+        name = empty_to_null(name);
+
+        if (streq_ptr(name, c->data[PROP_STATIC_HOSTNAME]))
+                return sd_bus_reply_method_return(m, NULL);
+
+        if (!isempty(name) && !hostname_is_valid(name, false))
+                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(&c->data[PROP_STATIC_HOSTNAME], name);
+        if (r < 0)
+                return r;
+
+        r = context_update_kernel_hostname(c);
+        if (r < 0) {
+                log_error_errno(r, "Failed to set host name: %m");
+                return sd_bus_error_set_errnof(error, r, "Failed to set hostname: %m");
+        }
+
+        r = context_write_data_static_hostname(c);
+        if (r < 0) {
+                log_error_errno(r, "Failed to write static host name: %m");
+                return sd_bus_error_set_errnof(error, r, "Failed to set static hostname: %m");
+        }
+
+        log_info("Changed static host name to '%s'", strna(c->data[PROP_STATIC_HOSTNAME]));
+
+        (void) sd_bus_emit_properties_changed(sd_bus_message_get_bus(m), "/org/freedesktop/hostname1", "org.freedesktop.hostname1", "StaticHostname", 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);
+
+        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 host name '%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(&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");
+                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 host name" :
+                 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 = userdata;
+        int interactive, r;
+
+        assert(m);
+        assert(c);
+
+        if (!c->has_uuid)
+                return sd_bus_error_set(error, BUS_ERROR_NO_PRODUCT_UUID, "Failed to read product UUID from /sys/class/dmi/id/product_uuid");
+
+        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 = sd_bus_message_new_method_return(m, &reply);
+        if (r < 0)
+                return r;
+
+        r = sd_bus_message_append_array(reply, 'y', &c->uuid, sizeof(c->uuid));
+        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", NULL, offsetof(Context, data) + sizeof(char*) * PROP_HOSTNAME, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
+        SD_BUS_PROPERTY("StaticHostname", "s", NULL, offsetof(Context, data) + sizeof(char*) * PROP_STATIC_HOSTNAME, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
+        SD_BUS_PROPERTY("PrettyHostname", "s", NULL, offsetof(Context, data) + sizeof(char*) * PROP_PRETTY_HOSTNAME, 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", NULL, offsetof(Context, data) + sizeof(char*) * PROP_DEPLOYMENT, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
+        SD_BUS_PROPERTY("Location", "s", NULL, offsetof(Context, data) + sizeof(char*) * PROP_LOCATION, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
+        SD_BUS_PROPERTY("KernelName", "s", NULL, offsetof(Context, data) + sizeof(char*) * PROP_KERNEL_NAME, SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("KernelRelease", "s", NULL, offsetof(Context, data) + sizeof(char*) * PROP_KERNEL_RELEASE, SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("KernelVersion", "s", NULL, offsetof(Context, data) + sizeof(char*) * PROP_KERNEL_VERSION, SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("OperatingSystemPrettyName", "s", NULL, offsetof(Context, data) + sizeof(char*) * PROP_OS_PRETTY_NAME, SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("OperatingSystemCPEName", "s", NULL, offsetof(Context, data) + sizeof(char*) * PROP_OS_CPE_NAME, SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_PROPERTY("HomeURL", "s", NULL, offsetof(Context, data) + sizeof(char*) * PROP_HOME_URL, SD_BUS_VTABLE_PROPERTY_CONST),
+        SD_BUS_METHOD("SetHostname", "sb", NULL, method_set_hostname, SD_BUS_VTABLE_UNPRIVILEGED),
+        SD_BUS_METHOD("SetStaticHostname", "sb", NULL, method_set_static_hostname, SD_BUS_VTABLE_UNPRIVILEGED),
+        SD_BUS_METHOD("SetPrettyHostname", "sb", NULL, method_set_pretty_hostname, SD_BUS_VTABLE_UNPRIVILEGED),
+        SD_BUS_METHOD("SetIconName", "sb", NULL, method_set_icon_name, SD_BUS_VTABLE_UNPRIVILEGED),
+        SD_BUS_METHOD("SetChassis", "sb", NULL, method_set_chassis, SD_BUS_VTABLE_UNPRIVILEGED),
+        SD_BUS_METHOD("SetDeployment", "sb", NULL, method_set_deployment, SD_BUS_VTABLE_UNPRIVILEGED),
+        SD_BUS_METHOD("SetLocation", "sb", NULL, method_set_location, SD_BUS_VTABLE_UNPRIVILEGED),
+        SD_BUS_METHOD("GetProductUUID", "b", "ay", method_get_product_uuid, SD_BUS_VTABLE_UNPRIVILEGED),
+        SD_BUS_VTABLE_END,
+};
+
+static int connect_bus(Context *c, sd_event *event, sd_bus **_bus) {
+        _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
+        int r;
+
+        assert(c);
+        assert(event);
+        assert(_bus);
+
+        r = sd_bus_default_system(&bus);
+        if (r < 0)
+                return log_error_errno(r, "Failed to get system bus connection: %m");
+
+        r = sd_bus_add_object_vtable(bus, NULL, "/org/freedesktop/hostname1", "org.freedesktop.hostname1", hostname_vtable, c);
+        if (r < 0)
+                return log_error_errno(r, "Failed to register object: %m");
+
+        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");
+
+        *_bus = TAKE_PTR(bus);
+
+        return 0;
+}
+
+static int run(int argc, char *argv[]) {
+        _cleanup_(context_clear) Context context = {};
+        _cleanup_(sd_event_unrefp) sd_event *event = NULL;
+        _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
+        int r;
+
+        log_setup_service();
+
+        umask(0022);
+        mac_selinux_init();
+
+        if (argc != 1) {
+                log_error("This program takes no arguments.");
+                return -EINVAL;
+        }
+
+        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 = context_read_data(&context);
+        if (r < 0)
+                return log_error_errno(r, "Failed to read hostname and machine information: %m");
+
+        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);