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