diff options
Diffstat (limited to 'src/hostname')
| -rw-r--r-- | src/hostname/hostnamectl.c | 449 | ||||
| -rw-r--r-- | src/hostname/hostnamed.c | 763 | ||||
| -rw-r--r-- | src/hostname/meson.build | 10 | ||||
| -rw-r--r-- | src/hostname/org.freedesktop.hostname1.conf | 29 | ||||
| -rw-r--r-- | src/hostname/org.freedesktop.hostname1.policy | 60 | ||||
| -rw-r--r-- | src/hostname/org.freedesktop.hostname1.service | 12 |
6 files changed, 1323 insertions, 0 deletions
diff --git a/src/hostname/hostnamectl.c b/src/hostname/hostnamectl.c new file mode 100644 index 0000000..7f9bb49 --- /dev/null +++ b/src/hostname/hostnamectl.c @@ -0,0 +1,449 @@ +/* SPDX-License-Identifier: LGPL-2.1+ */ + +#include <getopt.h> +#include <locale.h> +#include <stdbool.h> +#include <stdlib.h> +#include <string.h> + +#include "sd-bus.h" +#include "sd-id128.h" + +#include "alloc-util.h" +#include "architecture.h" +#include "bus-error.h" +#include "bus-util.h" +#include "hostname-util.h" +#include "main-func.h" +#include "pretty-print.h" +#include "spawn-polkit-agent.h" +#include "util.h" +#include "verbs.h" + +static bool arg_ask_password = true; +static BusTransport arg_transport = BUS_TRANSPORT_LOCAL; +static char *arg_host = NULL; +static bool arg_transient = false; +static bool arg_pretty = false; +static bool arg_static = false; + +typedef struct StatusInfo { + const char *hostname; + const char *static_hostname; + const char *pretty_hostname; + const char *icon_name; + const char *chassis; + const char *deployment; + const char *location; + const char *kernel_name; + const char *kernel_release; + const char *os_pretty_name; + const char *os_cpe_name; + const char *virtualization; + const char *architecture; + const char *home_url; +} StatusInfo; + +static void print_status_info(StatusInfo *i) { + sd_id128_t mid = {}, bid = {}; + int r; + + assert(i); + + printf(" Static hostname: %s\n", strna(i->static_hostname)); + + if (!isempty(i->pretty_hostname) && + !streq_ptr(i->pretty_hostname, i->static_hostname)) + printf(" Pretty hostname: %s\n", i->pretty_hostname); + + if (!isempty(i->hostname) && + !streq_ptr(i->hostname, i->static_hostname)) + printf("Transient hostname: %s\n", i->hostname); + + if (!isempty(i->icon_name)) + printf(" Icon name: %s\n", + strna(i->icon_name)); + + if (!isempty(i->chassis)) + printf(" Chassis: %s\n", + strna(i->chassis)); + + if (!isempty(i->deployment)) + printf(" Deployment: %s\n", i->deployment); + + if (!isempty(i->location)) + printf(" Location: %s\n", i->location); + + r = sd_id128_get_machine(&mid); + if (r >= 0) + printf(" Machine ID: " SD_ID128_FORMAT_STR "\n", SD_ID128_FORMAT_VAL(mid)); + + r = sd_id128_get_boot(&bid); + if (r >= 0) + printf(" Boot ID: " SD_ID128_FORMAT_STR "\n", SD_ID128_FORMAT_VAL(bid)); + + if (!isempty(i->virtualization)) + printf(" Virtualization: %s\n", i->virtualization); + + if (!isempty(i->os_pretty_name)) { + _cleanup_free_ char *formatted = NULL; + const char *t = i->os_pretty_name; + + if (i->home_url) { + if (terminal_urlify(i->home_url, i->os_pretty_name, &formatted) >= 0) + t = formatted; + } + + printf(" Operating System: %s\n", t); + } + + if (!isempty(i->os_cpe_name)) + printf(" CPE OS Name: %s\n", i->os_cpe_name); + + if (!isempty(i->kernel_name) && !isempty(i->kernel_release)) + printf(" Kernel: %s %s\n", i->kernel_name, i->kernel_release); + + if (!isempty(i->architecture)) + printf(" Architecture: %s\n", i->architecture); + +} + +static int show_one_name(sd_bus *bus, const char* attr) { + _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; + _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; + const char *s; + int r; + + r = sd_bus_get_property( + bus, + "org.freedesktop.hostname1", + "/org/freedesktop/hostname1", + "org.freedesktop.hostname1", + attr, + &error, &reply, "s"); + if (r < 0) + return log_error_errno(r, "Could not get property: %s", bus_error_message(&error, r)); + + r = sd_bus_message_read(reply, "s", &s); + if (r < 0) + return bus_log_parse_error(r); + + printf("%s\n", s); + + return 0; +} + +static int show_all_names(sd_bus *bus, sd_bus_error *error) { + StatusInfo info = {}; + + static const struct bus_properties_map hostname_map[] = { + { "Hostname", "s", NULL, offsetof(StatusInfo, hostname) }, + { "StaticHostname", "s", NULL, offsetof(StatusInfo, static_hostname) }, + { "PrettyHostname", "s", NULL, offsetof(StatusInfo, pretty_hostname) }, + { "IconName", "s", NULL, offsetof(StatusInfo, icon_name) }, + { "Chassis", "s", NULL, offsetof(StatusInfo, chassis) }, + { "Deployment", "s", NULL, offsetof(StatusInfo, deployment) }, + { "Location", "s", NULL, offsetof(StatusInfo, location) }, + { "KernelName", "s", NULL, offsetof(StatusInfo, kernel_name) }, + { "KernelRelease", "s", NULL, offsetof(StatusInfo, kernel_release) }, + { "OperatingSystemPrettyName", "s", NULL, offsetof(StatusInfo, os_pretty_name) }, + { "OperatingSystemCPEName", "s", NULL, offsetof(StatusInfo, os_cpe_name) }, + { "HomeURL", "s", NULL, offsetof(StatusInfo, home_url) }, + {} + }; + + static const struct bus_properties_map manager_map[] = { + { "Virtualization", "s", NULL, offsetof(StatusInfo, virtualization) }, + { "Architecture", "s", NULL, offsetof(StatusInfo, architecture) }, + {} + }; + + _cleanup_(sd_bus_message_unrefp) sd_bus_message *host_message = NULL, *manager_message = NULL; + int r; + + r = bus_map_all_properties(bus, + "org.freedesktop.hostname1", + "/org/freedesktop/hostname1", + hostname_map, + 0, + error, + &host_message, + &info); + if (r < 0) + return r; + + r = bus_map_all_properties(bus, + "org.freedesktop.systemd1", + "/org/freedesktop/systemd1", + manager_map, + 0, + error, + &manager_message, + &info); + + print_status_info(&info); + + return r; +} + +static int show_status(int argc, char **argv, void *userdata) { + sd_bus *bus = userdata; + int r; + + if (arg_pretty || arg_static || arg_transient) { + const char *attr; + + if (!!arg_static + !!arg_pretty + !!arg_transient > 1) { + log_error("Cannot query more than one name type at a time"); + return -EINVAL; + } + + attr = arg_pretty ? "PrettyHostname" : + arg_static ? "StaticHostname" : "Hostname"; + + return show_one_name(bus, attr); + } else { + _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; + + r = show_all_names(bus, &error); + if (r < 0) + return log_error_errno(r, "Failed to query system properties: %s", bus_error_message(&error, r)); + + return 0; + } +} + +static int set_simple_string(sd_bus *bus, const char *method, const char *value) { + _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; + int r = 0; + + polkit_agent_open_if_enabled(arg_transport, arg_ask_password); + + r = sd_bus_call_method( + bus, + "org.freedesktop.hostname1", + "/org/freedesktop/hostname1", + "org.freedesktop.hostname1", + method, + &error, NULL, + "sb", value, arg_ask_password); + if (r < 0) + return log_error_errno(r, "Could not set property: %s", bus_error_message(&error, -r)); + + return 0; +} + +static int set_hostname(int argc, char **argv, void *userdata) { + _cleanup_free_ char *h = NULL; + const char *hostname = argv[1]; + sd_bus *bus = userdata; + int r; + + if (!arg_pretty && !arg_static && !arg_transient) + arg_pretty = arg_static = arg_transient = true; + + if (arg_pretty) { + const char *p; + + /* If the passed hostname is already valid, then assume the user doesn't know anything about pretty + * hostnames, so let's unset the pretty hostname, and just set the passed hostname as static/dynamic + * hostname. */ + if (arg_static && hostname_is_valid(hostname, true)) + p = ""; /* No pretty hostname (as it is redundant), just a static one */ + else + p = hostname; /* Use the passed name as pretty hostname */ + + r = set_simple_string(bus, "SetPrettyHostname", p); + if (r < 0) + return r; + + /* Now that we set the pretty hostname, let's clean up the parameter and use that as static + * hostname. If the hostname was already valid as static hostname, this will only chop off the trailing + * dot if there is one. If it was not valid, then it will be made fully valid by truncating, dropping + * multiple dots, and dropping weird chars. Note that we clean the name up only if we also are + * supposed to set the pretty name. If the pretty name is not being set we assume the user knows what + * he does and pass the name as-is. */ + h = strdup(hostname); + if (!h) + return log_oom(); + + hostname = hostname_cleanup(h); /* Use the cleaned up name as static hostname */ + } + + if (arg_static) { + r = set_simple_string(bus, "SetStaticHostname", hostname); + if (r < 0) + return r; + } + + if (arg_transient) { + r = set_simple_string(bus, "SetHostname", hostname); + if (r < 0) + return r; + } + + return 0; +} + +static int set_icon_name(int argc, char **argv, void *userdata) { + return set_simple_string(userdata, "SetIconName", argv[1]); +} + +static int set_chassis(int argc, char **argv, void *userdata) { + return set_simple_string(userdata, "SetChassis", argv[1]); +} + +static int set_deployment(int argc, char **argv, void *userdata) { + return set_simple_string(userdata, "SetDeployment", argv[1]); +} + +static int set_location(int argc, char **argv, void *userdata) { + return set_simple_string(userdata, "SetLocation", argv[1]); +} + +static int help(void) { + _cleanup_free_ char *link = NULL; + int r; + + r = terminal_urlify_man("hostnamectl", "1", &link); + if (r < 0) + return log_oom(); + + printf("%s [OPTIONS...] COMMAND ...\n\n" + "Query or change system hostname.\n\n" + " -h --help Show this help\n" + " --version Show package version\n" + " --no-ask-password Do not prompt for password\n" + " -H --host=[USER@]HOST Operate on remote host\n" + " -M --machine=CONTAINER Operate on local container\n" + " --transient Only set transient hostname\n" + " --static Only set static hostname\n" + " --pretty Only set pretty hostname\n\n" + "Commands:\n" + " status Show current hostname settings\n" + " set-hostname NAME Set system hostname\n" + " set-icon-name NAME Set icon name for host\n" + " set-chassis NAME Set chassis type for host\n" + " set-deployment NAME Set deployment environment for host\n" + " set-location NAME Set location for host\n" + "\nSee the %s for details.\n" + , program_invocation_short_name + , link + ); + + return 0; +} + +static int verb_help(int argc, char **argv, void *userdata) { + return help(); +} + +static int parse_argv(int argc, char *argv[]) { + + enum { + ARG_VERSION = 0x100, + ARG_NO_ASK_PASSWORD, + ARG_TRANSIENT, + ARG_STATIC, + ARG_PRETTY + }; + + static const struct option options[] = { + { "help", no_argument, NULL, 'h' }, + { "version", no_argument, NULL, ARG_VERSION }, + { "transient", no_argument, NULL, ARG_TRANSIENT }, + { "static", no_argument, NULL, ARG_STATIC }, + { "pretty", no_argument, NULL, ARG_PRETTY }, + { "host", required_argument, NULL, 'H' }, + { "machine", required_argument, NULL, 'M' }, + { "no-ask-password", no_argument, NULL, ARG_NO_ASK_PASSWORD }, + {} + }; + + int c; + + assert(argc >= 0); + assert(argv); + + while ((c = getopt_long(argc, argv, "hH:M:", options, NULL)) >= 0) + + switch (c) { + + case 'h': + return help(); + + case ARG_VERSION: + return version(); + + case 'H': + arg_transport = BUS_TRANSPORT_REMOTE; + arg_host = optarg; + break; + + case 'M': + arg_transport = BUS_TRANSPORT_MACHINE; + arg_host = optarg; + break; + + case ARG_TRANSIENT: + arg_transient = true; + break; + + case ARG_PRETTY: + arg_pretty = true; + break; + + case ARG_STATIC: + arg_static = true; + break; + + case ARG_NO_ASK_PASSWORD: + arg_ask_password = false; + break; + + case '?': + return -EINVAL; + + default: + assert_not_reached("Unhandled option"); + } + + return 1; +} + +static int hostnamectl_main(sd_bus *bus, int argc, char *argv[]) { + + static const Verb verbs[] = { + { "status", VERB_ANY, 1, VERB_DEFAULT, show_status }, + { "set-hostname", 2, 2, 0, set_hostname }, + { "set-icon-name", 2, 2, 0, set_icon_name }, + { "set-chassis", 2, 2, 0, set_chassis }, + { "set-deployment", 2, 2, 0, set_deployment }, + { "set-location", 2, 2, 0, set_location }, + { "help", VERB_ANY, VERB_ANY, 0, verb_help }, /* Not documented, but supported since it is created. */ + {} + }; + + return dispatch_verb(argc, argv, verbs, bus); +} + +static int run(int argc, char *argv[]) { + _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL; + int r; + + setlocale(LC_ALL, ""); + log_parse_environment(); + log_open(); + + r = parse_argv(argc, argv); + if (r <= 0) + return r; + + r = bus_connect_transport(arg_transport, arg_host, false, &bus); + if (r < 0) + return log_error_errno(r, "Failed to create bus connection: %m"); + + return hostnamectl_main(bus, argc, argv); +} + +DEFINE_MAIN_FUNCTION(run); diff --git a/src/hostname/hostnamed.c b/src/hostname/hostnamed.c new file mode 100644 index 0000000..7777450 --- /dev/null +++ b/src/hostname/hostnamed.c @@ -0,0 +1,763 @@ +/* SPDX-License-Identifier: LGPL-2.1+ */ + +#include <errno.h> +#include <string.h> +#include <sys/utsname.h> +#include <unistd.h> + +#include "alloc-util.h" +#include "bus-common-errors.h" +#include "bus-util.h" +#include "def.h" +#include "env-file-label.h" +#include "env-file.h" +#include "env-util.h" +#include "fileio-label.h" +#include "fileio.h" +#include "hostname-util.h" +#include "id128-util.h" +#include "main-func.h" +#include "missing_capability.h" +#include "nscd-flush.h" +#include "os-util.h" +#include "parse-util.h" +#include "path-util.h" +#include "selinux-util.h" +#include "signal-util.h" +#include "strv.h" +#include "user-util.h" +#include "util.h" +#include "virt.h" + +#define VALID_DEPLOYMENT_CHARS (DIGITS LETTERS "-.:") + +enum { + PROP_HOSTNAME, + PROP_STATIC_HOSTNAME, + PROP_PRETTY_HOSTNAME, + PROP_ICON_NAME, + PROP_CHASSIS, + PROP_DEPLOYMENT, + PROP_LOCATION, + PROP_KERNEL_NAME, + PROP_KERNEL_RELEASE, + PROP_KERNEL_VERSION, + PROP_OS_PRETTY_NAME, + PROP_OS_CPE_NAME, + PROP_HOME_URL, + _PROP_MAX +}; + +typedef struct Context { + char *data[_PROP_MAX]; + Hashmap *polkit_registry; + sd_id128_t uuid; + bool has_uuid; +} Context; + +static void context_reset(Context *c) { + int p; + + assert(c); + + for (p = 0; p < _PROP_MAX; p++) + c->data[p] = mfree(c->data[p]); +} + +static void context_clear(Context *c) { + assert(c); + + context_reset(c); + bus_verify_polkit_async_registry_free(c->polkit_registry); +} + +static int context_read_data(Context *c) { + int r; + struct utsname u; + + assert(c); + + context_reset(c); + + assert_se(uname(&u) >= 0); + c->data[PROP_KERNEL_NAME] = strdup(u.sysname); + c->data[PROP_KERNEL_RELEASE] = strdup(u.release); + c->data[PROP_KERNEL_VERSION] = strdup(u.version); + if (!c->data[PROP_KERNEL_NAME] || !c->data[PROP_KERNEL_RELEASE] || + !c->data[PROP_KERNEL_VERSION]) + return -ENOMEM; + + c->data[PROP_HOSTNAME] = gethostname_malloc(); + if (!c->data[PROP_HOSTNAME]) + return -ENOMEM; + + r = read_etc_hostname(NULL, &c->data[PROP_STATIC_HOSTNAME]); + if (r < 0 && r != -ENOENT) + return r; + + r = parse_env_file(NULL, "/etc/machine-info", + "PRETTY_HOSTNAME", &c->data[PROP_PRETTY_HOSTNAME], + "ICON_NAME", &c->data[PROP_ICON_NAME], + "CHASSIS", &c->data[PROP_CHASSIS], + "DEPLOYMENT", &c->data[PROP_DEPLOYMENT], + "LOCATION", &c->data[PROP_LOCATION]); + if (r < 0 && r != -ENOENT) + return r; + + r = parse_os_release(NULL, + "PRETTY_NAME", &c->data[PROP_OS_PRETTY_NAME], + "CPE_NAME", &c->data[PROP_OS_CPE_NAME], + "HOME_URL", &c->data[PROP_HOME_URL], + NULL); + if (r < 0 && r != -ENOENT) + return r; + + r = id128_read("/sys/class/dmi/id/product_uuid", ID128_UUID, &c->uuid); + if (r < 0) + log_full_errno(r == -ENOENT ? LOG_DEBUG : LOG_WARNING, r, + "Failed to read product UUID, ignoring: %m"); + else if (sd_id128_is_null(c->uuid) || sd_id128_is_allf(c->uuid)) + log_debug("DMI product UUID " SD_ID128_FORMAT_STR " is all 0x00 or all 0xFF, ignoring.", SD_ID128_FORMAT_VAL(c->uuid)); + else + c->has_uuid = true; + + return 0; +} + +static bool valid_chassis(const char *chassis) { + assert(chassis); + + return nulstr_contains( + "vm\0" + "container\0" + "desktop\0" + "laptop\0" + "convertible\0" + "server\0" + "tablet\0" + "handset\0" + "watch\0" + "embedded\0", + chassis); +} + +static bool valid_deployment(const char *deployment) { + assert(deployment); + + return in_charset(deployment, VALID_DEPLOYMENT_CHARS); +} + +static const char* fallback_chassis(void) { + char *type; + unsigned t; + int v, r; + + v = detect_virtualization(); + if (VIRTUALIZATION_IS_VM(v)) + return "vm"; + if (VIRTUALIZATION_IS_CONTAINER(v)) + return "container"; + + r = read_one_line_file("/sys/class/dmi/id/chassis_type", &type); + if (r < 0) + goto try_acpi; + + r = safe_atou(type, &t); + free(type); + if (r < 0) + goto try_acpi; + + /* We only list the really obvious cases here. The DMI data is unreliable enough, so let's not do any + additional guesswork on top of that. + + See the SMBIOS Specification 3.0 section 7.4.1 for details about the values listed here: + + https://www.dmtf.org/sites/default/files/standards/documents/DSP0134_3.0.0.pdf + */ + + switch (t) { + + case 0x3: /* Desktop */ + case 0x4: /* Low Profile Desktop */ + case 0x6: /* Mini Tower */ + case 0x7: /* Tower */ + return "desktop"; + + case 0x8: /* Portable */ + case 0x9: /* Laptop */ + case 0xA: /* Notebook */ + case 0xE: /* Sub Notebook */ + return "laptop"; + + case 0xB: /* Hand Held */ + return "handset"; + + case 0x11: /* Main Server Chassis */ + case 0x1C: /* Blade */ + case 0x1D: /* Blade Enclosure */ + return "server"; + + case 0x1E: /* Tablet */ + return "tablet"; + + case 0x1F: /* Convertible */ + case 0x20: /* Detachable */ + return "convertible"; + } + +try_acpi: + r = read_one_line_file("/sys/firmware/acpi/pm_profile", &type); + if (r < 0) + return NULL; + + r = safe_atou(type, &t); + free(type); + if (r < 0) + return NULL; + + /* We only list the really obvious cases here as the ACPI data is not really super reliable. + * + * See the ACPI 5.0 Spec Section 5.2.9.1 for details: + * + * http://www.acpi.info/DOWNLOADS/ACPIspec50.pdf + */ + + switch(t) { + + case 1: /* Desktop */ + case 3: /* Workstation */ + case 6: /* Appliance PC */ + return "desktop"; + + case 2: /* Mobile */ + return "laptop"; + + case 4: /* Enterprise Server */ + case 5: /* SOHO Server */ + case 7: /* Performance Server */ + return "server"; + + case 8: /* Tablet */ + return "tablet"; + } + + return NULL; +} + +static char* context_fallback_icon_name(Context *c) { + const char *chassis; + + assert(c); + + if (!isempty(c->data[PROP_CHASSIS])) + return strappend("computer-", c->data[PROP_CHASSIS]); + + chassis = fallback_chassis(); + if (chassis) + return strappend("computer-", chassis); + + return strdup("computer"); +} + +static bool hostname_is_useful(const char *hn) { + return !isempty(hn) && !is_localhost(hn); +} + +static int context_update_kernel_hostname(Context *c) { + const char *static_hn; + const char *hn; + + assert(c); + + static_hn = c->data[PROP_STATIC_HOSTNAME]; + + /* /etc/hostname with something other than "localhost" + * has the highest preference ... */ + if (hostname_is_useful(static_hn)) + hn = static_hn; + + /* ... the transient host name, (ie: DHCP) comes next ... */ + else if (!isempty(c->data[PROP_HOSTNAME])) + hn = c->data[PROP_HOSTNAME]; + + /* ... fallback to static "localhost.*" ignored above ... */ + else if (!isempty(static_hn)) + hn = static_hn; + + /* ... and the ultimate fallback */ + else + hn = FALLBACK_HOSTNAME; + + if (sethostname_idempotent(hn) < 0) + return -errno; + + (void) nscd_flush_cache(STRV_MAKE("hosts")); + + return 0; +} + +static int context_write_data_static_hostname(Context *c) { + + assert(c); + + if (isempty(c->data[PROP_STATIC_HOSTNAME])) { + + if (unlink("/etc/hostname") < 0) + return errno == ENOENT ? 0 : -errno; + + return 0; + } + return write_string_file_atomic_label("/etc/hostname", c->data[PROP_STATIC_HOSTNAME]); +} + +static int context_write_data_machine_info(Context *c) { + + static const char * const name[_PROP_MAX] = { + [PROP_PRETTY_HOSTNAME] = "PRETTY_HOSTNAME", + [PROP_ICON_NAME] = "ICON_NAME", + [PROP_CHASSIS] = "CHASSIS", + [PROP_DEPLOYMENT] = "DEPLOYMENT", + [PROP_LOCATION] = "LOCATION", + }; + + _cleanup_strv_free_ char **l = NULL; + int r, p; + + assert(c); + + r = load_env_file(NULL, "/etc/machine-info", &l); + if (r < 0 && r != -ENOENT) + return r; + + for (p = PROP_PRETTY_HOSTNAME; p <= PROP_LOCATION; p++) { + _cleanup_free_ char *t = NULL; + char **u; + + assert(name[p]); + + if (isempty(c->data[p])) { + strv_env_unset(l, name[p]); + continue; + } + + t = strjoin(name[p], "=", c->data[p]); + if (!t) + return -ENOMEM; + + u = strv_env_set(l, t); + if (!u) + return -ENOMEM; + + strv_free_and_replace(l, u); + } + + if (strv_isempty(l)) { + if (unlink("/etc/machine-info") < 0) + return errno == ENOENT ? 0 : -errno; + + return 0; + } + + return write_env_file_label("/etc/machine-info", l); +} + +static int property_get_icon_name( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + + _cleanup_free_ char *n = NULL; + Context *c = userdata; + const char *name; + + if (isempty(c->data[PROP_ICON_NAME])) + name = n = context_fallback_icon_name(c); + else + name = c->data[PROP_ICON_NAME]; + + if (!name) + return -ENOMEM; + + return sd_bus_message_append(reply, "s", name); +} + +static int property_get_chassis( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + + Context *c = userdata; + const char *name; + + if (isempty(c->data[PROP_CHASSIS])) + name = fallback_chassis(); + else + name = c->data[PROP_CHASSIS]; + + return sd_bus_message_append(reply, "s", name); +} + +static int method_set_hostname(sd_bus_message *m, void *userdata, sd_bus_error *error) { + Context *c = userdata; + const char *name; + int interactive; + int r; + + assert(m); + assert(c); + + r = sd_bus_message_read(m, "sb", &name, &interactive); + if (r < 0) + return r; + + if (isempty(name)) + name = c->data[PROP_STATIC_HOSTNAME]; + + if (isempty(name)) + name = FALLBACK_HOSTNAME; + + if (!hostname_is_valid(name, false)) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid hostname '%s'", name); + + if (streq_ptr(name, c->data[PROP_HOSTNAME])) + return sd_bus_reply_method_return(m, NULL); + + r = bus_verify_polkit_async( + m, + CAP_SYS_ADMIN, + "org.freedesktop.hostname1.set-hostname", + NULL, + interactive, + UID_INVALID, + &c->polkit_registry, + error); + if (r < 0) + return r; + if (r == 0) + return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */ + + r = free_and_strdup(&c->data[PROP_HOSTNAME], name); + if (r < 0) + return r; + + r = context_update_kernel_hostname(c); + if (r < 0) { + log_error_errno(r, "Failed to set host name: %m"); + return sd_bus_error_set_errnof(error, r, "Failed to set hostname: %m"); + } + + log_info("Changed host name to '%s'", strna(c->data[PROP_HOSTNAME])); + + (void) sd_bus_emit_properties_changed(sd_bus_message_get_bus(m), "/org/freedesktop/hostname1", "org.freedesktop.hostname1", "Hostname", NULL); + + return sd_bus_reply_method_return(m, NULL); +} + +static int method_set_static_hostname(sd_bus_message *m, void *userdata, sd_bus_error *error) { + Context *c = userdata; + const char *name; + int interactive; + int r; + + assert(m); + assert(c); + + r = sd_bus_message_read(m, "sb", &name, &interactive); + if (r < 0) + return r; + + name = empty_to_null(name); + + if (streq_ptr(name, c->data[PROP_STATIC_HOSTNAME])) + return sd_bus_reply_method_return(m, NULL); + + if (!isempty(name) && !hostname_is_valid(name, false)) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid static hostname '%s'", name); + + r = bus_verify_polkit_async( + m, + CAP_SYS_ADMIN, + "org.freedesktop.hostname1.set-static-hostname", + NULL, + interactive, + UID_INVALID, + &c->polkit_registry, + error); + if (r < 0) + return r; + if (r == 0) + return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */ + + r = free_and_strdup(&c->data[PROP_STATIC_HOSTNAME], name); + if (r < 0) + return r; + + r = context_update_kernel_hostname(c); + if (r < 0) { + log_error_errno(r, "Failed to set host name: %m"); + return sd_bus_error_set_errnof(error, r, "Failed to set hostname: %m"); + } + + r = context_write_data_static_hostname(c); + if (r < 0) { + log_error_errno(r, "Failed to write static host name: %m"); + return sd_bus_error_set_errnof(error, r, "Failed to set static hostname: %m"); + } + + log_info("Changed static host name to '%s'", strna(c->data[PROP_STATIC_HOSTNAME])); + + (void) sd_bus_emit_properties_changed(sd_bus_message_get_bus(m), "/org/freedesktop/hostname1", "org.freedesktop.hostname1", "StaticHostname", NULL); + + return sd_bus_reply_method_return(m, NULL); +} + +static int set_machine_info(Context *c, sd_bus_message *m, int prop, sd_bus_message_handler_t cb, sd_bus_error *error) { + int interactive; + const char *name; + int r; + + assert(c); + assert(m); + + r = sd_bus_message_read(m, "sb", &name, &interactive); + if (r < 0) + return r; + + name = empty_to_null(name); + + if (streq_ptr(name, c->data[prop])) + return sd_bus_reply_method_return(m, NULL); + + if (!isempty(name)) { + /* The icon name might ultimately be used as file + * name, so better be safe than sorry */ + + if (prop == PROP_ICON_NAME && !filename_is_valid(name)) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid icon name '%s'", name); + if (prop == PROP_PRETTY_HOSTNAME && string_has_cc(name, NULL)) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid pretty host name '%s'", name); + if (prop == PROP_CHASSIS && !valid_chassis(name)) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid chassis '%s'", name); + if (prop == PROP_DEPLOYMENT && !valid_deployment(name)) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid deployment '%s'", name); + if (prop == PROP_LOCATION && string_has_cc(name, NULL)) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid location '%s'", name); + } + + /* Since the pretty hostname should always be changed at the + * same time as the static one, use the same policy action for + * both... */ + + r = bus_verify_polkit_async( + m, + CAP_SYS_ADMIN, + prop == PROP_PRETTY_HOSTNAME ? "org.freedesktop.hostname1.set-static-hostname" : "org.freedesktop.hostname1.set-machine-info", + NULL, + interactive, + UID_INVALID, + &c->polkit_registry, + error); + if (r < 0) + return r; + if (r == 0) + return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */ + + r = free_and_strdup(&c->data[prop], name); + if (r < 0) + return r; + + r = context_write_data_machine_info(c); + if (r < 0) { + log_error_errno(r, "Failed to write machine info: %m"); + return sd_bus_error_set_errnof(error, r, "Failed to write machine info: %m"); + } + + log_info("Changed %s to '%s'", + prop == PROP_PRETTY_HOSTNAME ? "pretty host name" : + prop == PROP_DEPLOYMENT ? "deployment" : + prop == PROP_LOCATION ? "location" : + prop == PROP_CHASSIS ? "chassis" : "icon name", strna(c->data[prop])); + + (void) sd_bus_emit_properties_changed( + sd_bus_message_get_bus(m), + "/org/freedesktop/hostname1", + "org.freedesktop.hostname1", + prop == PROP_PRETTY_HOSTNAME ? "PrettyHostname" : + prop == PROP_DEPLOYMENT ? "Deployment" : + prop == PROP_LOCATION ? "Location" : + prop == PROP_CHASSIS ? "Chassis" : "IconName" , NULL); + + return sd_bus_reply_method_return(m, NULL); +} + +static int method_set_pretty_hostname(sd_bus_message *m, void *userdata, sd_bus_error *error) { + return set_machine_info(userdata, m, PROP_PRETTY_HOSTNAME, method_set_pretty_hostname, error); +} + +static int method_set_icon_name(sd_bus_message *m, void *userdata, sd_bus_error *error) { + return set_machine_info(userdata, m, PROP_ICON_NAME, method_set_icon_name, error); +} + +static int method_set_chassis(sd_bus_message *m, void *userdata, sd_bus_error *error) { + return set_machine_info(userdata, m, PROP_CHASSIS, method_set_chassis, error); +} + +static int method_set_deployment(sd_bus_message *m, void *userdata, sd_bus_error *error) { + return set_machine_info(userdata, m, PROP_DEPLOYMENT, method_set_deployment, error); +} + +static int method_set_location(sd_bus_message *m, void *userdata, sd_bus_error *error) { + return set_machine_info(userdata, m, PROP_LOCATION, method_set_location, error); +} + +static int method_get_product_uuid(sd_bus_message *m, void *userdata, sd_bus_error *error) { + _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; + Context *c = userdata; + int interactive, r; + + assert(m); + assert(c); + + if (!c->has_uuid) + return sd_bus_error_set(error, BUS_ERROR_NO_PRODUCT_UUID, "Failed to read product UUID from /sys/class/dmi/id/product_uuid"); + + r = sd_bus_message_read(m, "b", &interactive); + if (r < 0) + return r; + + r = bus_verify_polkit_async( + m, + CAP_SYS_ADMIN, + "org.freedesktop.hostname1.get-product-uuid", + NULL, + interactive, + UID_INVALID, + &c->polkit_registry, + error); + if (r < 0) + return r; + if (r == 0) + return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */ + + r = sd_bus_message_new_method_return(m, &reply); + if (r < 0) + return r; + + r = sd_bus_message_append_array(reply, 'y', &c->uuid, sizeof(c->uuid)); + if (r < 0) + return r; + + return sd_bus_send(NULL, reply, NULL); +} + +static const sd_bus_vtable hostname_vtable[] = { + SD_BUS_VTABLE_START(0), + SD_BUS_PROPERTY("Hostname", "s", NULL, offsetof(Context, data) + sizeof(char*) * PROP_HOSTNAME, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + SD_BUS_PROPERTY("StaticHostname", "s", NULL, offsetof(Context, data) + sizeof(char*) * PROP_STATIC_HOSTNAME, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + SD_BUS_PROPERTY("PrettyHostname", "s", NULL, offsetof(Context, data) + sizeof(char*) * PROP_PRETTY_HOSTNAME, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + SD_BUS_PROPERTY("IconName", "s", property_get_icon_name, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + SD_BUS_PROPERTY("Chassis", "s", property_get_chassis, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + SD_BUS_PROPERTY("Deployment", "s", NULL, offsetof(Context, data) + sizeof(char*) * PROP_DEPLOYMENT, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + SD_BUS_PROPERTY("Location", "s", NULL, offsetof(Context, data) + sizeof(char*) * PROP_LOCATION, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + SD_BUS_PROPERTY("KernelName", "s", NULL, offsetof(Context, data) + sizeof(char*) * PROP_KERNEL_NAME, SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("KernelRelease", "s", NULL, offsetof(Context, data) + sizeof(char*) * PROP_KERNEL_RELEASE, SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("KernelVersion", "s", NULL, offsetof(Context, data) + sizeof(char*) * PROP_KERNEL_VERSION, SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("OperatingSystemPrettyName", "s", NULL, offsetof(Context, data) + sizeof(char*) * PROP_OS_PRETTY_NAME, SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("OperatingSystemCPEName", "s", NULL, offsetof(Context, data) + sizeof(char*) * PROP_OS_CPE_NAME, SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("HomeURL", "s", NULL, offsetof(Context, data) + sizeof(char*) * PROP_HOME_URL, SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_METHOD("SetHostname", "sb", NULL, method_set_hostname, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("SetStaticHostname", "sb", NULL, method_set_static_hostname, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("SetPrettyHostname", "sb", NULL, method_set_pretty_hostname, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("SetIconName", "sb", NULL, method_set_icon_name, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("SetChassis", "sb", NULL, method_set_chassis, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("SetDeployment", "sb", NULL, method_set_deployment, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("SetLocation", "sb", NULL, method_set_location, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("GetProductUUID", "b", "ay", method_get_product_uuid, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_VTABLE_END, +}; + +static int connect_bus(Context *c, sd_event *event, sd_bus **_bus) { + _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL; + int r; + + assert(c); + assert(event); + assert(_bus); + + r = sd_bus_default_system(&bus); + if (r < 0) + return log_error_errno(r, "Failed to get system bus connection: %m"); + + r = sd_bus_add_object_vtable(bus, NULL, "/org/freedesktop/hostname1", "org.freedesktop.hostname1", hostname_vtable, c); + if (r < 0) + return log_error_errno(r, "Failed to register object: %m"); + + r = sd_bus_request_name_async(bus, NULL, "org.freedesktop.hostname1", 0, NULL, NULL); + if (r < 0) + return log_error_errno(r, "Failed to request name: %m"); + + r = sd_bus_attach_event(bus, event, 0); + if (r < 0) + return log_error_errno(r, "Failed to attach bus to event loop: %m"); + + *_bus = TAKE_PTR(bus); + + return 0; +} + +static int run(int argc, char *argv[]) { + _cleanup_(context_clear) Context context = {}; + _cleanup_(sd_event_unrefp) sd_event *event = NULL; + _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL; + int r; + + log_setup_service(); + + umask(0022); + mac_selinux_init(); + + if (argc != 1) { + log_error("This program takes no arguments."); + return -EINVAL; + } + + assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, -1) >= 0); + + r = sd_event_default(&event); + if (r < 0) + return log_error_errno(r, "Failed to allocate event loop: %m"); + + (void) sd_event_set_watchdog(event, true); + + r = sd_event_add_signal(event, NULL, SIGINT, NULL, NULL); + if (r < 0) + return log_error_errno(r, "Failed to install SIGINT handler: %m"); + + r = sd_event_add_signal(event, NULL, SIGTERM, NULL, NULL); + if (r < 0) + return log_error_errno(r, "Failed to install SIGTERM handler: %m"); + + r = connect_bus(&context, event, &bus); + if (r < 0) + return r; + + r = context_read_data(&context); + if (r < 0) + return log_error_errno(r, "Failed to read hostname and machine information: %m"); + + r = bus_event_loop_with_idle(event, bus, "org.freedesktop.hostname1", DEFAULT_EXIT_USEC, NULL, NULL); + if (r < 0) + return log_error_errno(r, "Failed to run event loop: %m"); + + return 0; +} + +DEFINE_MAIN_FUNCTION(run); diff --git a/src/hostname/meson.build b/src/hostname/meson.build new file mode 100644 index 0000000..db66ba5 --- /dev/null +++ b/src/hostname/meson.build @@ -0,0 +1,10 @@ +# SPDX-License-Identifier: LGPL-2.1+ + +if conf.get('ENABLE_HOSTNAMED') == 1 + install_data('org.freedesktop.hostname1.conf', + install_dir : dbuspolicydir) + install_data('org.freedesktop.hostname1.service', + install_dir : dbussystemservicedir) + install_data('org.freedesktop.hostname1.policy', + install_dir : polkitpolicydir) +endif diff --git a/src/hostname/org.freedesktop.hostname1.conf b/src/hostname/org.freedesktop.hostname1.conf new file mode 100644 index 0000000..e2658c6 --- /dev/null +++ b/src/hostname/org.freedesktop.hostname1.conf @@ -0,0 +1,29 @@ +<?xml version="1.0"?> <!--*-nxml-*--> +<!DOCTYPE busconfig PUBLIC "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN" + "http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd"> + +<!-- + SPDX-License-Identifier: LGPL-2.1+ + + This file is part of systemd. + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. +--> + +<busconfig> + + <policy user="root"> + <allow own="org.freedesktop.hostname1"/> + <allow send_destination="org.freedesktop.hostname1"/> + <allow receive_sender="org.freedesktop.hostname1"/> + </policy> + + <policy context="default"> + <allow send_destination="org.freedesktop.hostname1"/> + <allow receive_sender="org.freedesktop.hostname1"/> + </policy> + +</busconfig> diff --git a/src/hostname/org.freedesktop.hostname1.policy b/src/hostname/org.freedesktop.hostname1.policy new file mode 100644 index 0000000..5bedc0b --- /dev/null +++ b/src/hostname/org.freedesktop.hostname1.policy @@ -0,0 +1,60 @@ +<?xml version="1.0" encoding="UTF-8"?> <!--*-nxml-*--> +<!DOCTYPE policyconfig PUBLIC "-//freedesktop//DTD PolicyKit Policy Configuration 1.0//EN" + "http://www.freedesktop.org/standards/PolicyKit/1/policyconfig.dtd"> + +<!-- + SPDX-License-Identifier: LGPL-2.1+ + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. +--> + +<policyconfig> + + <vendor>The systemd Project</vendor> + <vendor_url>http://www.freedesktop.org/wiki/Software/systemd</vendor_url> + + <action id="org.freedesktop.hostname1.set-hostname"> + <description gettext-domain="systemd">Set host name</description> + <message gettext-domain="systemd">Authentication is required to set the local host name.</message> + <defaults> + <allow_any>auth_admin_keep</allow_any> + <allow_inactive>auth_admin_keep</allow_inactive> + <allow_active>auth_admin_keep</allow_active> + </defaults> + </action> + + <action id="org.freedesktop.hostname1.set-static-hostname"> + <description gettext-domain="systemd">Set static host name</description> + <message gettext-domain="systemd">Authentication is required to set the statically configured local host name, as well as the pretty host name.</message> + <defaults> + <allow_any>auth_admin_keep</allow_any> + <allow_inactive>auth_admin_keep</allow_inactive> + <allow_active>auth_admin_keep</allow_active> + </defaults> + <annotate key="org.freedesktop.policykit.imply">org.freedesktop.hostname1.set-hostname org.freedesktop.hostname1.set-machine-info</annotate> + </action> + + <action id="org.freedesktop.hostname1.set-machine-info"> + <description gettext-domain="systemd">Set machine information</description> + <message gettext-domain="systemd">Authentication is required to set local machine information.</message> + <defaults> + <allow_any>auth_admin_keep</allow_any> + <allow_inactive>auth_admin_keep</allow_inactive> + <allow_active>auth_admin_keep</allow_active> + </defaults> + </action> + + <action id="org.freedesktop.hostname1.get-product-uuid"> + <description gettext-domain="systemd">Get product UUID</description> + <message gettext-domain="systemd">Authentication is required to get product UUID.</message> + <defaults> + <allow_any>auth_admin_keep</allow_any> + <allow_inactive>auth_admin_keep</allow_inactive> + <allow_active>auth_admin_keep</allow_active> + </defaults> + </action> + +</policyconfig> diff --git a/src/hostname/org.freedesktop.hostname1.service b/src/hostname/org.freedesktop.hostname1.service new file mode 100644 index 0000000..98c7bcb --- /dev/null +++ b/src/hostname/org.freedesktop.hostname1.service @@ -0,0 +1,12 @@ +# SPDX-License-Identifier: LGPL-2.1+ +# +# systemd is free software; you can redistribute it and/or modify it +# under the terms of the GNU Lesser General Public License as published by +# the Free Software Foundation; either version 2.1 of the License, or +# (at your option) any later version. + +[D-BUS Service] +Name=org.freedesktop.hostname1 +Exec=/bin/false +User=root +SystemdService=dbus-org.freedesktop.hostname1.service |