/* SPDX-License-Identifier: LGPL-2.1-or-later */ #include #include #include #include "sd-bus.h" #include "sd-device.h" #include "sd-event.h" #include "sd-json.h" #include "alloc-util.h" #include "bitfield.h" #include "bus-common-errors.h" #include "bus-get-properties.h" #include "bus-log-control-api.h" #include "bus-object.h" #include "bus-polkit.h" #include "bus-util.h" #include "constants.h" #include "daemon-util.h" #include "device-private.h" #include "env-file.h" #include "env-util.h" #include "escape.h" #include "extract-word.h" #include "fileio.h" #include "hashmap.h" #include "hostname-setup.h" #include "hostname-util.h" #include "id128-util.h" #include "json-util.h" #include "label-util.h" #include "log.h" #include "main-func.h" #include "nulstr-util.h" #include "os-util.h" #include "parse-util.h" #include "path-util.h" #include "service-util.h" #include "socket-util.h" #include "stat-util.h" #include "string-util.h" #include "strv.h" #include "time-util.h" #include "utf8.h" #include "varlink-io.systemd.Hostname.h" #include "varlink-io.systemd.service.h" #include "varlink-util.h" #include "virt.h" #define VALID_DEPLOYMENT_CHARS (ALPHANUMERICAL "-.:") /* 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, PROP_STATIC_HOSTNAME_SUBSTITUTED_WILDCARDS, /* Read from /etc/machine-info */ PROP_PRETTY_HOSTNAME, PROP_ICON_NAME, PROP_CHASSIS, PROP_DEPLOYMENT, PROP_LOCATION, PROP_HARDWARE_VENDOR, PROP_HARDWARE_MODEL, PROP_HARDWARE_SKU, PROP_HARDWARE_VERSION, /* Read from /etc/os-release (or /usr/lib/os-release) */ PROP_OS_PRETTY_NAME, PROP_OS_FANCY_NAME, PROP_OS_CPE_NAME, PROP_OS_HOME_URL, PROP_OS_SUPPORT_END, PROP_OS_IMAGE_ID, PROP_OS_IMAGE_VERSION, _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; sd_event *event; sd_bus *bus; sd_varlink_server *varlink_server; Hashmap *polkit_registry; sd_device *device_dmi; sd_device *device_acpi; sd_device *device_tree; } Context; static void context_reset(Context *c, uint64_t mask) { assert(c); for (HostProperty p = 0; p < _PROP_MAX; p++) { if (!BIT_SET(mask, p)) continue; c->data[p] = mfree(c->data[p]); } } #define context_reset_many(c, ...) \ context_reset((c), INDEXES_TO_MASK(uint64_t, __VA_ARGS__)) static void context_destroy(Context *c) { assert(c); context_reset(c, UINT64_MAX); hashmap_free(c->polkit_registry); sd_event_unref(c->event); sd_bus_flush_close_unref(c->bus); sd_varlink_server_unref(c->varlink_server); sd_device_unref(c->device_dmi); sd_device_unref(c->device_acpi); sd_device_unref(c->device_tree); } static void context_read_etc_hostname(Context *c) { struct stat current_stat = {}; int r; assert(c); if (stat(etc_hostname(), ¤t_stat) >= 0 && stat_inode_unmodified(&c->etc_hostname_stat, ¤t_stat)) return; context_reset_many(c, PROP_STATIC_HOSTNAME, PROP_STATIC_HOSTNAME_SUBSTITUTED_WILDCARDS); r = read_etc_hostname(/* path= */ NULL, /* substitute_wildcards= */ false, &c->data[PROP_STATIC_HOSTNAME]); if (r < 0) { if (r != -ENOENT) log_warning_errno(r, "Failed to read /etc/hostname, ignoring: %m"); } else { _cleanup_free_ char *substituted = strdup(c->data[PROP_STATIC_HOSTNAME]); if (!substituted) return (void) log_oom(); r = hostname_substitute_wildcards(substituted); if (r < 0) log_warning_errno(r, "Failed to substitute wildcards in /etc/hostname, ignoring: %m"); else c->data[PROP_STATIC_HOSTNAME_SUBSTITUTED_WILDCARDS] = TAKE_PTR(substituted); } 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(), ¤t_stat) >= 0 && stat_inode_unmodified(&c->etc_machine_info_stat, ¤t_stat)) return; context_reset_many(c, PROP_PRETTY_HOSTNAME, PROP_ICON_NAME, PROP_CHASSIS, PROP_DEPLOYMENT, PROP_LOCATION, PROP_HARDWARE_VENDOR, PROP_HARDWARE_MODEL, PROP_HARDWARE_SKU, PROP_HARDWARE_VERSION); 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], "HARDWARE_SKU", &c->data[PROP_HARDWARE_SKU], "HARDWARE_VERSION", &c->data[PROP_HARDWARE_VERSION]); 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, *os_fancy_name = NULL, *os_ansi_color = NULL; struct stat current_stat = {}; int r; assert(c); if ((stat("/etc/os-release", ¤t_stat) >= 0 || stat("/usr/lib/os-release", ¤t_stat) >= 0) && stat_inode_unmodified(&c->etc_os_release_stat, ¤t_stat)) return; context_reset_many(c, PROP_OS_PRETTY_NAME, PROP_OS_FANCY_NAME, PROP_OS_CPE_NAME, PROP_OS_HOME_URL, PROP_OS_SUPPORT_END, PROP_OS_IMAGE_ID, PROP_OS_IMAGE_VERSION); r = parse_os_release(NULL, "PRETTY_NAME", &os_pretty_name, "FANCY_NAME", &os_fancy_name, "ANSI_COLOR", &os_ansi_color, "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], "IMAGE_ID", &c->data[PROP_OS_IMAGE_ID], "IMAGE_VERSION", &c->data[PROP_OS_IMAGE_VERSION]); 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(); if (!isempty(os_fancy_name)) { _cleanup_free_ char *unescaped = NULL; /* We undo one level of C escapes on this */ ssize_t l = cunescape(os_fancy_name, /* flags= */ 0, &unescaped); if (l < 0) { log_warning_errno(l, "Failed to unescape fancy OS name, ignoring: %m"); os_fancy_name = mfree(os_fancy_name); } else if (!utf8_is_valid(unescaped)) { log_warning("Unescaped fancy OS name contains invalid UTF-8, ignoring."); os_fancy_name = mfree(os_fancy_name); } else free_and_replace(os_fancy_name, unescaped); } if (isempty(os_fancy_name)) { free(os_fancy_name); /* free if empty string */ if (isempty(os_ansi_color)) os_fancy_name = strdup(c->data[PROP_OS_PRETTY_NAME]); else os_fancy_name = strjoin("\x1B[", os_ansi_color, "m", c->data[PROP_OS_PRETTY_NAME]); if (!os_fancy_name) log_oom(); } free_and_replace(c->data[PROP_OS_FANCY_NAME], os_fancy_name); 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 context_acquire_dmi_device(Context *c) { int r; assert(c); assert(!c->device_dmi); if (!use_dmi_data()) return 0; r = sd_device_new_from_syspath(&c->device_dmi, "/sys/class/dmi/id/"); if (ERRNO_IS_NEG_DEVICE_ABSENT(r)) { log_debug_errno(r, "Failed to open /sys/class/dmi/id/ device, ignoring: %m"); return 0; } if (r < 0) return log_error_errno(r, "Failed to open /sys/class/dmi/id/ device: %m"); return 1; } static int context_acquire_acpi_device(Context *c) { int r; assert(c); assert(!c->device_acpi); r = sd_device_new_from_syspath(&c->device_acpi, "/sys/firmware/acpi/"); if (ERRNO_IS_NEG_DEVICE_ABSENT(r)) { log_debug_errno(r, "Failed to open /sys/firmware/acpi/ device, ignoring: %m"); return 0; } if (r < 0) return log_error_errno(r, "Failed to open /sys/firmware/acpi/ device: %m"); return 1; } static int context_acquire_device_tree(Context *c) { int r; assert(c); assert(!c->device_tree); r = sd_device_new_from_path(&c->device_tree, "/proc/device-tree/"); if (ERRNO_IS_NEG_DEVICE_ABSENT(r)) { log_debug_errno(r, "Failed to open /proc/device-tree/ device, ignoring: %m"); return 0; } if (r < 0) return log_error_errno(r, "Failed to open /proc/device-tree/ device: %m"); return 1; } static bool string_is_safe_for_dbus(const char *s) { assert(s); /* Do some superficial validation: do not allow CCs and make sure D-Bus won't kick us off the bus * because we send invalid UTF-8 data */ if (string_has_cc(s, /* ok= */ NULL)) return false; return utf8_is_valid(s); } static int get_dmi_property(Context *c, const char *key, char **ret) { const char *s; int r; assert(c); assert(key); assert(ret); if (!c->device_dmi) return -ENODEV; r = sd_device_get_property_value(c->device_dmi, key, &s); if (r < 0) return r; if (!string_is_safe_for_dbus(s)) return -ENXIO; return strdup_to(ret, s); } static int get_dmi_properties(Context *c, const char * const * keys, char **ret) { int r = -ENOENT; assert(c); assert(ret); STRV_FOREACH(k, keys) { r = get_dmi_property(c, *k, ret); if (r >= 0 || !ERRNO_IS_NEG_DEVICE_ABSENT(r)) return r; } return r; } static int get_chassis_asset_tag(Context *c, char **ret) { return get_dmi_property(c, "ID_CHASSIS_ASSET_TAG", ret); } static int get_hardware_vendor(Context *c, char **ret) { return get_dmi_properties(c, STRV_MAKE_CONST("ID_VENDOR_FROM_DATABASE", "ID_VENDOR"), ret); } static int get_hardware_model(Context *c, char **ret) { return get_dmi_properties(c, STRV_MAKE_CONST("ID_MODEL_FROM_DATABASE", "ID_MODEL"), ret); } static int get_hardware_sku(Context *c, char **ret) { _cleanup_free_ char *model = NULL, *sku = NULL; int r; r = get_dmi_property(c, "ID_SKU", &sku); if (r < 0) return r; /* Suppress reporting the SKU field, if it's the same string as the * model field, which it appears to be on various systems */ r = get_hardware_model(c, &model); if (r < 0) { if (r != -ENOENT) return r; } else if (streq_ptr(sku, model)) return -ENOENT; *ret = TAKE_PTR(sku); return 0; } static int get_hardware_version(Context *c, char **ret) { _cleanup_free_ char *version = NULL; int r; r = get_dmi_property(c, "ID_HARDWARE_VERSION", &version); if (r < 0) return r; /* Suppress reporting the version field, if it's the same string as the * model or sku field, which it appears to be on various systems */ int (*getter)(Context *c, char **ret); FOREACH_ARGUMENT(getter, get_hardware_model, get_hardware_sku) { _cleanup_free_ char *value = NULL; r = getter(c, &value); if (r == -ENOENT) continue; if (r < 0) return r; if (streq_ptr(version, value)) return -ENOENT; } *ret = TAKE_PTR(version); return 0; } static int get_sysattr(sd_device *device, const char *key, char **ret) { const char *s; int r; assert(key); assert(ret); if (!device) return -ENODEV; r = sd_device_get_sysattr_value(device, key, &s); if (r < 0) return r; if (!string_is_safe_for_dbus(s)) return -ENXIO; return strdup_to(ret, empty_to_null(s)); } static int get_dmi_sysattr(Context *c, const char *key, char **ret) { return get_sysattr(ASSERT_PTR(c)->device_dmi, key, ret); } static int get_device_tree_sysattr(Context *c, const char *key, char **ret) { return get_sysattr(ASSERT_PTR(c)->device_tree, key, ret); } static int get_hardware_serial(Context *c, char **ret) { int r; assert(c); assert(ret); FOREACH_STRING(attr, "product_serial", "board_serial") { r = get_dmi_sysattr(c, attr, ret); if (r >= 0 || !ERRNO_IS_NEG_DEVICE_ABSENT(r)) return r; } return get_device_tree_sysattr(c, "serial-number", ret); } static int get_firmware_version(Context *c, char **ret) { return get_dmi_sysattr(c, "bios_version", ret); } static int get_firmware_vendor(Context *c, char **ret) { return get_dmi_sysattr(c, "bios_vendor", ret); } static int get_firmware_date(Context *c, usec_t *ret) { _cleanup_free_ char *bios_date = NULL, *month = NULL, *day = NULL, *year = NULL; int r; assert(c); assert(ret); r = get_dmi_sysattr(c, "bios_date", &bios_date); if (ERRNO_IS_NEG_DEVICE_ABSENT(r)) { *ret = USEC_INFINITY; return 0; } if (r < 0) return r; const char *p = bios_date; r = extract_many_words(&p, "/", EXTRACT_DONT_COALESCE_SEPARATORS, &month, &day, &year); 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, }; usec_t v; r = mktime_or_timegm_usec(&tm, /* utc= */ true, &v); if (r < 0) return r; 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 = v; 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_by_virtualization(void) { Virtualization v = detect_virtualization(); if (v < 0) { log_debug_errno(v, "Failed to detect virtualization, ignoring: %m"); return NULL; } if (VIRTUALIZATION_IS_VM(v)) return "vm"; if (VIRTUALIZATION_IS_CONTAINER(v)) return "container"; return NULL; } static const char* fallback_chassis_by_dmi(Context *c) { unsigned t; int r; assert(c); if (!c->device_dmi) return NULL; r = device_get_sysattr_unsigned(c->device_dmi, "chassis_type", &t); if (r < 0) { log_debug_errno(r, "Failed to read/parse DMI chassis type, ignoring: %m"); return NULL; } /* 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); return NULL; } } static const char* fallback_chassis_by_acpi(Context *c) { unsigned t; int r; assert(c); if (!c->device_acpi) return NULL; r = device_get_sysattr_unsigned(c->device_acpi, "pm_profile", &t); if (r < 0) { log_debug_errno(r, "Failed to read/parse ACPI PM profile, ignoring: %m"); 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"; default: log_debug("Unhandled ACPI PM profile 0x%02x, ignoring.", t); return NULL; } } static const char* fallback_chassis_by_device_tree(Context *c) { const char *type, *chassis; int r; assert(c); if (!c->device_tree) return NULL; r = sd_device_get_sysattr_value(c->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 const char* fallback_chassis(Context *c) { assert(c); return fallback_chassis_by_virtualization() ?: fallback_chassis_by_dmi(c) ?: fallback_chassis_by_acpi(c) ?: fallback_chassis_by_device_tree(c); } 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_property(c, "ID_CHASSIS", &dmi) >= 0) return dmi; fallback = fallback_chassis(c); 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_hostname) { _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_SUBSTITUTED_WILDCARDS]) { hn = c->data[PROP_STATIC_HOSTNAME_SUBSTITUTED_WILDCARDS]; hns = HOSTNAME_STATIC; /* ... the transient hostname, (ie: DHCP) comes next ... */ } else if (transient_hostname) { hn = transient_hostname; 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; } 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(etc_hostname(), c->data[PROP_STATIC_HOSTNAME], WRITE_STRING_FILE_CREATE|WRITE_STRING_FILE_ATOMIC|WRITE_STRING_FILE_LABEL); 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 (HostProperty 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( AT_FDCWD, etc_machine_info(), /* headers= */ NULL, l, WRITE_ENV_FILE_LABEL); 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)(Context *c, char **ret)) { _cleanup_free_ char *from_dmi = NULL; assert(reply); assert(c); assert(IN_SET(prop, PROP_HARDWARE_VENDOR, PROP_HARDWARE_MODEL, PROP_HARDWARE_SKU, PROP_HARDWARE_VERSION)); assert(getter); context_read_machine_info(c); if (isempty(c->data[prop])) (void) getter(c, &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_hardware_sku( 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_SKU, get_hardware_sku); } static int property_get_hardware_version( 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_VERSION, get_hardware_version); } 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; Context *c = ASSERT_PTR(userdata); (void) get_firmware_version(c, &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; Context *c = ASSERT_PTR(userdata); (void) get_firmware_vendor(c, &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; Context *c = ASSERT_PTR(userdata); (void) get_firmware_date(c, &firmware_date); return sd_bus_message_append(reply, "t", firmware_date); } static int property_get_chassis_asset_tag( 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_asset_tag = NULL; Context *c = ASSERT_PTR(userdata); (void) get_chassis_asset_tag(c, &chassis_asset_tag); return sd_bus_message_append(reply, "s", chassis_asset_tag); } 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_SUBSTITUTED_WILDCARDS]); } 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_SUBSTITUTED_WILDCARDS])) 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 property_get_vsock_cid( sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error) { unsigned local_cid = VMADDR_CID_ANY; (void) vsock_get_local_cid(&local_cid); return sd_bus_message_append(reply, "u", (uint32_t) local_cid); } static int validate_and_substitute_hostname(const char *name, char **ret_substituted, sd_bus_error *error) { int r; assert(ret_substituted); if (!name) { *ret_substituted = NULL; return 0; } _cleanup_free_ char *substituted = strdup(name); if (!substituted) return log_oom(); r = hostname_substitute_wildcards(substituted); if (r < 0) return log_error_errno(r, "Failed to substitute wildcards in hostname: %m"); if (!hostname_is_valid(substituted, 0)) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid hostname '%s'", name); *ret_substituted = TAKE_PTR(substituted); return 1; } 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. */ _cleanup_free_ char *substituted = NULL; r = validate_and_substitute_hostname(name, &substituted, error); if (r < 0) return r; name = substituted; r = bus_verify_polkit_async_full( m, "org.freedesktop.hostname1.set-hostname", /* details= */ NULL, /* good_user= */ UID_INVALID, interactive ? POLKIT_ALLOW_INTERACTIVE : 0, &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 */ context_read_etc_hostname(c); 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, 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); _cleanup_free_ char *substituted = NULL; r = validate_and_substitute_hostname(name, &substituted, error); if (r < 0) return r; r = bus_verify_polkit_async_full( m, "org.freedesktop.hostname1.set-static-hostname", /* details= */ NULL, /* good_user= */ UID_INVALID, interactive ? POLKIT_ALLOW_INTERACTIVE : 0, &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; free_and_replace(c->data[PROP_STATIC_HOSTNAME_SUBSTITUTED_WILDCARDS], substituted); 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, /* transient_hostname= */ 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_full( m, prop == PROP_PRETTY_HOSTNAME ? "org.freedesktop.hostname1.set-static-hostname" : "org.freedesktop.hostname1.set-machine-info", /* details= */ NULL, /* good_user= */ UID_INVALID, interactive ? POLKIT_ALLOW_INTERACTIVE : 0, &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_full( m, "org.freedesktop.hostname1.get-product-uuid", /* details= */ NULL, /* good_user= */ UID_INVALID, interactive ? POLKIT_ALLOW_INTERACTIVE : 0, &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_message_send(reply); } static int method_get_hardware_serial(sd_bus_message *m, void *userdata, sd_bus_error *error) { _cleanup_free_ char *serial = NULL; Context *c = ASSERT_PTR(userdata); int r; assert(m); r = bus_verify_polkit_async( m, "org.freedesktop.hostname1.get-hardware-serial", /* details= */ NULL, &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(c, &serial); if (r < 0) return sd_bus_error_set(error, BUS_ERROR_NO_HARDWARE_SERIAL, "Failed to read hardware serial from firmware."); return sd_bus_reply_method_return(m, "s", serial); } static int build_describe_response(Context *c, bool privileged, sd_json_variant **ret) { _cleanup_free_ char *hn = NULL, *dhn = NULL, *in = NULL, *chassis = NULL, *vendor = NULL, *model = NULL, *serial = NULL, *firmware_version = NULL, *firmware_vendor = NULL, *chassis_asset_tag = NULL, *sku = NULL, *hardware_version = NULL; _cleanup_strv_free_ char **os_release_pairs = NULL, **machine_info_pairs = NULL; usec_t firmware_date = USEC_INFINITY, eol = USEC_INFINITY; _cleanup_(sd_json_variant_unrefp) sd_json_variant *v = NULL; sd_id128_t machine_id, boot_id, product_uuid = SD_ID128_NULL; unsigned local_cid = VMADDR_CID_ANY; struct utsname u; int r; assert(c); assert(ret); context_read_etc_hostname(c); context_read_machine_info(c); context_read_os_release(c); context_determine_hostname_source(c); dhn = get_default_hostname(); if (!dhn) return log_oom(); r = gethostname_strict(&hn); if (r < 0 && r != -ENXIO) return log_error_errno(r, "Failed to read local host name: %m"); 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(c, &vendor); if (isempty(c->data[PROP_HARDWARE_MODEL])) (void) get_hardware_model(c, &model); if (isempty(c->data[PROP_HARDWARE_SKU])) (void) get_hardware_sku(c, &sku); if (isempty(c->data[PROP_HARDWARE_VERSION])) (void) get_hardware_version(c, &hardware_version); if (privileged) { /* The product UUID and hardware serial is only available to privileged clients */ (void) id128_get_product(&product_uuid); (void) get_hardware_serial(c, &serial); } (void) get_firmware_version(c, &firmware_version); (void) get_firmware_vendor(c, &firmware_vendor); (void) get_firmware_date(c, &firmware_date); (void) get_chassis_asset_tag(c, &chassis_asset_tag); 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"); (void) vsock_get_local_cid(&local_cid); (void) load_os_release_pairs(/* root= */ NULL, &os_release_pairs); (void) load_env_file_pairs(/* f= */ NULL, etc_machine_info(), &machine_info_pairs); r = sd_json_buildo( &v, SD_JSON_BUILD_PAIR_STRING("Hostname", hn ?: dhn), SD_JSON_BUILD_PAIR_STRING("StaticHostname", c->data[PROP_STATIC_HOSTNAME_SUBSTITUTED_WILDCARDS]), SD_JSON_BUILD_PAIR_STRING("PrettyHostname", c->data[PROP_PRETTY_HOSTNAME]), SD_JSON_BUILD_PAIR_STRING("DefaultHostname", dhn), SD_JSON_BUILD_PAIR_STRING("HostnameSource", hostname_source_to_string(c->hostname_source)), SD_JSON_BUILD_PAIR_STRING("IconName", in ?: c->data[PROP_ICON_NAME]), SD_JSON_BUILD_PAIR_STRING("Chassis", chassis), SD_JSON_BUILD_PAIR_STRING("ChassisAssetTag", chassis_asset_tag), SD_JSON_BUILD_PAIR_STRING("Deployment", c->data[PROP_DEPLOYMENT]), SD_JSON_BUILD_PAIR_STRING("Location", c->data[PROP_LOCATION]), SD_JSON_BUILD_PAIR_STRING("KernelName", u.sysname), SD_JSON_BUILD_PAIR_STRING("KernelRelease", u.release), SD_JSON_BUILD_PAIR_STRING("KernelVersion", u.version), SD_JSON_BUILD_PAIR_STRING("OperatingSystemPrettyName", c->data[PROP_OS_PRETTY_NAME]), SD_JSON_BUILD_PAIR_STRING("OperatingSystemFancyName", c->data[PROP_OS_FANCY_NAME]), SD_JSON_BUILD_PAIR_STRING("OperatingSystemCPEName", c->data[PROP_OS_CPE_NAME]), SD_JSON_BUILD_PAIR_STRING("OperatingSystemHomeURL", c->data[PROP_OS_HOME_URL]), JSON_BUILD_PAIR_FINITE_USEC("OperatingSystemSupportEnd", eol), SD_JSON_BUILD_PAIR("OperatingSystemReleaseData", JSON_BUILD_STRV_ENV_PAIR(os_release_pairs)), SD_JSON_BUILD_PAIR_STRING("OperatingSystemImageID", c->data[PROP_OS_IMAGE_ID]), SD_JSON_BUILD_PAIR_STRING("OperatingSystemImageVersion", c->data[PROP_OS_IMAGE_VERSION]), SD_JSON_BUILD_PAIR("MachineInformationData", JSON_BUILD_STRV_ENV_PAIR(machine_info_pairs)), SD_JSON_BUILD_PAIR_STRING("HardwareVendor", vendor ?: c->data[PROP_HARDWARE_VENDOR]), SD_JSON_BUILD_PAIR_STRING("HardwareModel", model ?: c->data[PROP_HARDWARE_MODEL]), SD_JSON_BUILD_PAIR_STRING("HardwareSerial", serial), SD_JSON_BUILD_PAIR_STRING("HardwareSKU", sku ?: c->data[PROP_HARDWARE_SKU]), SD_JSON_BUILD_PAIR_STRING("HardwareVersion", hardware_version ?: c->data[PROP_HARDWARE_VERSION]), SD_JSON_BUILD_PAIR_STRING("FirmwareVersion", firmware_version), SD_JSON_BUILD_PAIR_STRING("FirmwareVendor", firmware_vendor), JSON_BUILD_PAIR_FINITE_USEC("FirmwareDate", firmware_date), SD_JSON_BUILD_PAIR_ID128("MachineID", machine_id), SD_JSON_BUILD_PAIR_ID128("BootID", boot_id), SD_JSON_BUILD_PAIR_CONDITION(!sd_id128_is_null(product_uuid), "ProductUUID", SD_JSON_BUILD_ID128(product_uuid)), SD_JSON_BUILD_PAIR_CONDITION(sd_id128_is_null(product_uuid), "ProductUUID", SD_JSON_BUILD_NULL), SD_JSON_BUILD_PAIR_CONDITION(local_cid != VMADDR_CID_ANY, "VSockCID", SD_JSON_BUILD_UNSIGNED(local_cid)), SD_JSON_BUILD_PAIR_CONDITION(local_cid == VMADDR_CID_ANY, "VSockCID", SD_JSON_BUILD_NULL)); if (r < 0) return log_error_errno(r, "Failed to build JSON data: %m"); *ret = TAKE_PTR(v); return 0; } static int method_describe(sd_bus_message *m, void *userdata, sd_bus_error *error) { _cleanup_(sd_json_variant_unrefp) sd_json_variant *v = NULL; Context *c = ASSERT_PTR(userdata); _cleanup_free_ char *text = NULL; bool privileged; int r; assert(m); r = bus_verify_polkit_async( m, "org.freedesktop.hostname1.get-description", /* details= */ NULL, &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; r = build_describe_response(c, privileged, &v); if (r < 0) return r; r = sd_json_variant_format(v, 0, &text); if (r < 0) return log_error_errno(r, "Failed to format JSON data: %m"); return sd_bus_reply_method_return(m, "s", text); } 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[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[PROP_DEPLOYMENT]), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), SD_BUS_PROPERTY("Location", "s", property_get_machine_info_field, offsetof(Context, data[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[PROP_OS_PRETTY_NAME]), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("OperatingSystemFancyName", "s", property_get_os_release_field, offsetof(Context, data[PROP_OS_FANCY_NAME]), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("OperatingSystemCPEName", "s", property_get_os_release_field, offsetof(Context, data[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[PROP_OS_HOME_URL]), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("OperatingSystemImageID", "s", property_get_os_release_field, offsetof(Context, data[PROP_OS_IMAGE_ID]), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("OperatingSystemImageVersion", "s", property_get_os_release_field, offsetof(Context, data[PROP_OS_IMAGE_VERSION]), 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("HardwareSKU", "s", property_get_hardware_sku, 0, SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("HardwareVersion", "s", property_get_hardware_version, 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_PROPERTY("VSockCID", "u", property_get_vsock_cid, 0, SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("ChassisAssetTag", "s", property_get_chassis_asset_tag, 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) { int r; assert(c); assert(c->event); assert(!c->bus); r = sd_bus_default_system(&c->bus); if (r < 0) return log_error_errno(r, "Failed to get system bus connection: %m"); r = bus_add_implementation(c->bus, &manager_object, c); if (r < 0) return r; r = bus_log_control_api_register(c->bus); if (r < 0) return r; r = sd_bus_request_name_async(c->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(c->bus, c->event, 0); if (r < 0) return log_error_errno(r, "Failed to attach bus to event loop: %m"); return 0; } static int vl_method_describe(sd_varlink *link, sd_json_variant *parameters, sd_varlink_method_flags_t flags, void *userdata) { Context *c = ASSERT_PTR(userdata); bool privileged; int r; assert(link); assert(parameters); r = sd_varlink_dispatch(link, parameters, dispatch_table_polkit_only, /* userdata= */ NULL); if (r != 0) return r; r = varlink_verify_polkit_async_full( link, c->bus, "org.freedesktop.hostname1.get-hardware-serial", /* details= */ NULL, UID_INVALID, POLKIT_DONT_REPLY, &c->polkit_registry); if (r == 0) return 0; /* 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; _cleanup_(sd_json_variant_unrefp) sd_json_variant *v = NULL; r = build_describe_response(c, privileged, &v); if (r < 0) return r; return sd_varlink_reply(link, v); } static int connect_varlink(Context *c) { int r; assert(c); assert(c->event); assert(!c->varlink_server); r = varlink_server_new( &c->varlink_server, SD_VARLINK_SERVER_ACCOUNT_UID|SD_VARLINK_SERVER_INHERIT_USERDATA, c); if (r < 0) return log_error_errno(r, "Failed to allocate Varlink server: %m"); r = sd_varlink_server_add_interface_many( c->varlink_server, &vl_interface_io_systemd_Hostname, &vl_interface_io_systemd_service); if (r < 0) return log_error_errno(r, "Failed to add Hostname interface to Varlink server: %m"); r = sd_varlink_server_bind_method_many( c->varlink_server, "io.systemd.Hostname.Describe", vl_method_describe, "io.systemd.service.Ping", varlink_method_ping, "io.systemd.service.SetLogLevel", varlink_method_set_log_level, "io.systemd.service.GetEnvironment", varlink_method_get_environment); if (r < 0) return log_error_errno(r, "Failed to bind Varlink method calls: %m"); r = sd_varlink_server_attach_event(c->varlink_server, c->event, SD_EVENT_PRIORITY_NORMAL); if (r < 0) return log_error_errno(r, "Failed to attach Varlink server to event loop: %m"); r = sd_varlink_server_listen_auto(c->varlink_server); if (r < 0) return log_error_errno(r, "Failed to bind to passed Varlink sockets: %m"); if (r == 0) { r = sd_varlink_server_listen_address(c->varlink_server, "/run/systemd/io.systemd.Hostname", 0666); if (r < 0) return log_error_errno(r, "Failed to bind to Varlink socket: %m"); } return 0; } static bool context_check_idle(void *userdata) { Context *c = ASSERT_PTR(userdata); return sd_varlink_server_current_connections(c->varlink_server) == 0 && hashmap_isempty(c->polkit_registry); } static int run(int argc, char *argv[]) { _cleanup_(context_destroy) Context context = { .hostname_source = _HOSTNAME_INVALID, /* appropriate value will be set later */ }; 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), /* runtime_scope= */ NULL, argc, argv); if (r <= 0) return r; umask(0022); r = mac_init(); if (r < 0) return r; r = context_acquire_dmi_device(&context); if (r < 0) return r; r = context_acquire_acpi_device(&context); if (r < 0) return r; r = context_acquire_device_tree(&context); if (r < 0) return r; r = sd_event_default(&context.event); if (r < 0) return log_error_errno(r, "Failed to allocate event loop: %m"); (void) sd_event_set_watchdog(context.event, true); r = sd_event_set_signal_exit(context.event, true); if (r < 0) return log_error_errno(r, "Failed to install SIGINT/SIGTERM handlers: %m"); r = connect_bus(&context); if (r < 0) return r; r = connect_varlink(&context); if (r < 0) return r; r = sd_notify(false, NOTIFY_READY_MESSAGE); if (r < 0) log_warning_errno(r, "Failed to send readiness notification, ignoring: %m"); r = bus_event_loop_with_idle( context.event, context.bus, "org.freedesktop.hostname1", DEFAULT_EXIT_USEC, context_check_idle, &context); if (r < 0) return log_error_errno(r, "Failed to run event loop: %m"); return 0; } DEFINE_MAIN_FUNCTION(run);