+++ /dev/null
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- This file is part of systemd.
-
- Copyright 2011 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <dbus/dbus.h>
-
-#include <errno.h>
-#include <string.h>
-#include <unistd.h>
-#include <dlfcn.h>
-
-#include "util.h"
-#include "strv.h"
-#include "dbus-common.h"
-#include "polkit.h"
-#include "def.h"
-#include "virt.h"
-
-#define INTERFACE \
- " <interface name=\"org.freedesktop.hostname1\">\n" \
- " <property name=\"Hostname\" type=\"s\" access=\"read\"/>\n" \
- " <property name=\"StaticHostname\" type=\"s\" access=\"read\"/>\n" \
- " <property name=\"PrettyHostname\" type=\"s\" access=\"read\"/>\n" \
- " <property name=\"IconName\" type=\"s\" access=\"read\"/>\n" \
- " <method name=\"SetHostname\">\n" \
- " <arg name=\"name\" type=\"s\" direction=\"in\"/>\n" \
- " <arg name=\"user_interaction\" type=\"b\" direction=\"in\"/>\n" \
- " </method>\n" \
- " <method name=\"SetStaticHostname\">\n" \
- " <arg name=\"name\" type=\"s\" direction=\"in\"/>\n" \
- " <arg name=\"user_interaction\" type=\"b\" direction=\"in\"/>\n" \
- " </method>\n" \
- " <method name=\"SetPrettyHostname\">\n" \
- " <arg name=\"name\" type=\"s\" direction=\"in\"/>\n" \
- " <arg name=\"user_interaction\" type=\"b\" direction=\"in\"/>\n" \
- " </method>\n" \
- " <method name=\"SetIconName\">\n" \
- " <arg name=\"name\" type=\"s\" direction=\"in\"/>\n" \
- " <arg name=\"user_interaction\" type=\"b\" direction=\"in\"/>\n" \
- " </method>\n" \
- " </interface>\n"
-
-#define INTROSPECTION \
- DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE \
- "<node>\n" \
- INTERFACE \
- BUS_PROPERTIES_INTERFACE \
- BUS_INTROSPECTABLE_INTERFACE \
- BUS_PEER_INTERFACE \
- "</node>\n"
-
-#define INTERFACES_LIST \
- BUS_GENERIC_INTERFACES_LIST \
- "org.freedesktop.hostname1\0"
-
-const char hostname_interface[] _introspect_("hostname1") = INTERFACE;
-
-enum {
- PROP_HOSTNAME,
- PROP_STATIC_HOSTNAME,
- PROP_PRETTY_HOSTNAME,
- PROP_ICON_NAME,
- _PROP_MAX
-};
-
-static char *data[_PROP_MAX] = {
- NULL,
- NULL,
- NULL,
- NULL
-};
-
-static usec_t remain_until = 0;
-
-static void free_data(void) {
- int p;
-
- for (p = 0; p < _PROP_MAX; p++) {
- free(data[p]);
- data[p] = NULL;
- }
-}
-
-static int read_data(void) {
- int r;
-
- free_data();
-
- data[PROP_HOSTNAME] = gethostname_malloc();
- if (!data[PROP_HOSTNAME])
- return -ENOMEM;
-
- r = read_one_line_file("/etc/hostname", &data[PROP_STATIC_HOSTNAME]);
- if (r < 0 && r != -ENOENT)
- return r;
-
- r = parse_env_file("/etc/machine-info", NEWLINE,
- "PRETTY_HOSTNAME", &data[PROP_PRETTY_HOSTNAME],
- "ICON_NAME", &data[PROP_ICON_NAME],
- NULL);
- if (r < 0 && r != -ENOENT)
- return r;
-
- return 0;
-}
-
-static bool check_nss(void) {
-
- void *dl;
-
- if ((dl = dlopen("libnss_myhostname.so.2", RTLD_LAZY))) {
- dlclose(dl);
- return true;
- }
-
- return false;
-}
-
-static const char* fallback_icon_name(void) {
-
-#if defined(__i386__) || defined(__x86_64__)
- int r;
- char *type;
- unsigned t;
-#endif
-
- if (detect_virtualization(NULL) > 0)
- return "computer-vm";
-
-#if defined(__i386__) || defined(__x86_64__)
- r = read_one_line_file("/sys/class/dmi/id/chassis_type", &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. The DMI data is
- unreliable enough, so let's not do any additional guesswork
- on top of that.
-
- See the SMBIOS Specification 2.7.1 section 7.4.1 for
- details about the values listed here:
-
- http://www.dmtf.org/sites/default/files/standards/documents/DSP0134_2.7.1.pdf
- */
-
- switch (t) {
-
- case 0x3:
- case 0x4:
- case 0x6:
- case 0x7:
- return "computer-desktop";
-
- case 0x9:
- case 0xA:
- case 0xE:
- return "computer-laptop";
-
- case 0x11:
- case 0x1C:
- return "computer-server";
- }
-
-#endif
- return NULL;
-}
-
-static int write_data_hostname(void) {
- const char *hn;
-
- if (isempty(data[PROP_HOSTNAME]))
- hn = "localhost";
- else
- hn = data[PROP_HOSTNAME];
-
- if (sethostname(hn, strlen(hn)) < 0)
- return -errno;
-
- return 0;
-}
-
-static int write_data_static_hostname(void) {
-
- if (isempty(data[PROP_STATIC_HOSTNAME])) {
-
- if (unlink("/etc/hostname") < 0)
- return errno == ENOENT ? 0 : -errno;
-
- return 0;
- }
-
- return write_one_line_file_atomic("/etc/hostname", data[PROP_STATIC_HOSTNAME]);
-}
-
-static int write_data_other(void) {
-
- static const char * const name[_PROP_MAX] = {
- [PROP_PRETTY_HOSTNAME] = "PRETTY_HOSTNAME",
- [PROP_ICON_NAME] = "ICON_NAME"
- };
-
- char **l = NULL;
- int r, p;
-
- r = load_env_file("/etc/machine-info", &l);
- if (r < 0 && r != -ENOENT)
- return r;
-
- for (p = 2; p < _PROP_MAX; p++) {
- char *t, **u;
-
- assert(name[p]);
-
- if (isempty(data[p])) {
- strv_env_unset(l, name[p]);
- continue;
- }
-
- if (asprintf(&t, "%s=%s", name[p], strempty(data[p])) < 0) {
- strv_free(l);
- return -ENOMEM;
- }
-
- u = strv_env_set(l, t);
- free(t);
- strv_free(l);
-
- if (!u)
- return -ENOMEM;
- l = u;
- }
-
- if (strv_isempty(l)) {
-
- if (unlink("/etc/machine-info") < 0)
- return errno == ENOENT ? 0 : -errno;
-
- return 0;
- }
-
- r = write_env_file("/etc/machine-info", l);
- strv_free(l);
-
- return r;
-}
-
-static int bus_hostname_append_icon_name(DBusMessageIter *i, const char *property, void *userdata) {
- const char *name;
-
- assert(i);
- assert(property);
-
- if (isempty(data[PROP_ICON_NAME]))
- name = fallback_icon_name();
- else
- name = data[PROP_ICON_NAME];
-
- return bus_property_append_string(i, property, (void*) name);
-}
-
-static DBusHandlerResult hostname_message_handler(
- DBusConnection *connection,
- DBusMessage *message,
- void *userdata) {
-
- const BusProperty properties[] = {
- { "org.freedesktop.hostname1", "Hostname", bus_property_append_string, "s", data[PROP_HOSTNAME]},
- { "org.freedesktop.hostname1", "StaticHostname", bus_property_append_string, "s", data[PROP_STATIC_HOSTNAME]},
- { "org.freedesktop.hostname1", "PrettyHostname", bus_property_append_string, "s", data[PROP_PRETTY_HOSTNAME]},
- { "org.freedesktop.hostname1", "IconName", bus_hostname_append_icon_name, "s", data[PROP_ICON_NAME]},
- { NULL, NULL, NULL, NULL, NULL }
- };
-
- DBusMessage *reply = NULL, *changed = NULL;
- DBusError error;
- int r;
-
- assert(connection);
- assert(message);
-
- dbus_error_init(&error);
-
- if (dbus_message_is_method_call(message, "org.freedesktop.hostname1", "SetHostname")) {
- const char *name;
- dbus_bool_t interactive;
-
- if (!dbus_message_get_args(
- message,
- &error,
- DBUS_TYPE_STRING, &name,
- DBUS_TYPE_BOOLEAN, &interactive,
- DBUS_TYPE_INVALID))
- return bus_send_error_reply(connection, message, &error, -EINVAL);
-
- if (isempty(name))
- name = data[PROP_STATIC_HOSTNAME];
-
- if (isempty(name))
- name = "localhost";
-
- if (!hostname_is_valid(name))
- return bus_send_error_reply(connection, message, NULL, -EINVAL);
-
- if (!streq_ptr(name, data[PROP_HOSTNAME])) {
- char *h;
-
- r = verify_polkit(connection, message, "org.freedesktop.hostname1.set-hostname", interactive, &error);
- if (r < 0)
- return bus_send_error_reply(connection, message, &error, r);
-
- h = strdup(name);
- if (!h)
- goto oom;
-
- free(data[PROP_HOSTNAME]);
- data[PROP_HOSTNAME] = h;
-
- r = write_data_hostname();
- if (r < 0) {
- log_error("Failed to set host name: %s", strerror(-r));
- return bus_send_error_reply(connection, message, NULL, r);
- }
-
- log_info("Changed host name to '%s'", strempty(data[PROP_HOSTNAME]));
-
- changed = bus_properties_changed_new(
- "/org/freedesktop/hostname1",
- "org.freedesktop.hostname1",
- "Hostname\0");
- if (!changed)
- goto oom;
- }
-
- } else if (dbus_message_is_method_call(message, "org.freedesktop.hostname1", "SetStaticHostname")) {
- const char *name;
- dbus_bool_t interactive;
-
- if (!dbus_message_get_args(
- message,
- &error,
- DBUS_TYPE_STRING, &name,
- DBUS_TYPE_BOOLEAN, &interactive,
- DBUS_TYPE_INVALID))
- return bus_send_error_reply(connection, message, &error, -EINVAL);
-
- if (isempty(name))
- name = NULL;
-
- if (!streq_ptr(name, data[PROP_STATIC_HOSTNAME])) {
-
- r = verify_polkit(connection, message, "org.freedesktop.hostname1.set-static-hostname", interactive, &error);
- if (r < 0)
- return bus_send_error_reply(connection, message, &error, r);
-
- if (isempty(name)) {
- free(data[PROP_STATIC_HOSTNAME]);
- data[PROP_STATIC_HOSTNAME] = NULL;
- } else {
- char *h;
-
- if (!hostname_is_valid(name))
- return bus_send_error_reply(connection, message, NULL, -EINVAL);
-
- h = strdup(name);
- if (!h)
- goto oom;
-
- free(data[PROP_STATIC_HOSTNAME]);
- data[PROP_STATIC_HOSTNAME] = h;
- }
-
- r = write_data_static_hostname();
- if (r < 0) {
- log_error("Failed to write static host name: %s", strerror(-r));
- return bus_send_error_reply(connection, message, NULL, r);
- }
-
- log_info("Changed static host name to '%s'", strempty(data[PROP_STATIC_HOSTNAME]));
-
- changed = bus_properties_changed_new(
- "/org/freedesktop/hostname1",
- "org.freedesktop.hostname1",
- "StaticHostname\0");
- if (!changed)
- goto oom;
- }
-
- } else if (dbus_message_is_method_call(message, "org.freedesktop.hostname1", "SetPrettyHostname") ||
- dbus_message_is_method_call(message, "org.freedesktop.hostname1", "SetIconName")) {
-
- const char *name;
- dbus_bool_t interactive;
- int k;
-
- if (!dbus_message_get_args(
- message,
- &error,
- DBUS_TYPE_STRING, &name,
- DBUS_TYPE_BOOLEAN, &interactive,
- DBUS_TYPE_INVALID))
- return bus_send_error_reply(connection, message, &error, -EINVAL);
-
- if (isempty(name))
- name = NULL;
-
- k = streq(dbus_message_get_member(message), "SetPrettyHostname") ? PROP_PRETTY_HOSTNAME : PROP_ICON_NAME;
-
- if (!streq_ptr(name, data[k])) {
-
- /* Since the pretty hostname should always be
- * changed at the same time as the static one,
- * use the same policy action for both... */
-
- r = verify_polkit(connection, message, k == PROP_PRETTY_HOSTNAME ?
- "org.freedesktop.hostname1.set-static-hostname" :
- "org.freedesktop.hostname1.set-machine-info", interactive, &error);
- if (r < 0)
- return bus_send_error_reply(connection, message, &error, r);
-
- if (isempty(name)) {
- free(data[k]);
- data[k] = NULL;
- } else {
- char *h;
-
- h = strdup(name);
- if (!h)
- goto oom;
-
- free(data[k]);
- data[k] = h;
- }
-
- r = write_data_other();
- if (r < 0) {
- log_error("Failed to write machine info: %s", strerror(-r));
- return bus_send_error_reply(connection, message, NULL, r);
- }
-
- log_info("Changed %s to '%s'", k == PROP_PRETTY_HOSTNAME ? "pretty host name" : "icon name", strempty(data[k]));
-
- changed = bus_properties_changed_new(
- "/org/freedesktop/hostname1",
- "org.freedesktop.hostname1",
- k == PROP_PRETTY_HOSTNAME ? "PrettyHostname\0" : "IconName\0");
- if (!changed)
- goto oom;
- }
-
- } else
- return bus_default_message_handler(connection, message, INTROSPECTION, INTERFACES_LIST, properties);
-
- if (!(reply = dbus_message_new_method_return(message)))
- goto oom;
-
- if (!dbus_connection_send(connection, reply, NULL))
- goto oom;
-
- dbus_message_unref(reply);
- reply = NULL;
-
- if (changed) {
-
- if (!dbus_connection_send(connection, changed, NULL))
- goto oom;
-
- dbus_message_unref(changed);
- }
-
- return DBUS_HANDLER_RESULT_HANDLED;
-
-oom:
- if (reply)
- dbus_message_unref(reply);
-
- if (changed)
- dbus_message_unref(changed);
-
- dbus_error_free(&error);
-
- return DBUS_HANDLER_RESULT_NEED_MEMORY;
-}
-
-static int connect_bus(DBusConnection **_bus) {
- static const DBusObjectPathVTable hostname_vtable = {
- .message_function = hostname_message_handler
- };
- DBusError error;
- DBusConnection *bus = NULL;
- int r;
-
- assert(_bus);
-
- dbus_error_init(&error);
-
- bus = dbus_bus_get_private(DBUS_BUS_SYSTEM, &error);
- if (!bus) {
- log_error("Failed to get system D-Bus connection: %s", bus_error_message(&error));
- r = -ECONNREFUSED;
- goto fail;
- }
-
- dbus_connection_set_exit_on_disconnect(bus, FALSE);
-
- if (!dbus_connection_register_object_path(bus, "/org/freedesktop/hostname1", &hostname_vtable, NULL) ||
- !dbus_connection_add_filter(bus, bus_exit_idle_filter, &remain_until, NULL)) {
- log_error("Not enough memory");
- r = -ENOMEM;
- goto fail;
- }
-
- r = dbus_bus_request_name(bus, "org.freedesktop.hostname1", DBUS_NAME_FLAG_DO_NOT_QUEUE, &error);
- if (dbus_error_is_set(&error)) {
- log_error("Failed to register name on bus: %s", bus_error_message(&error));
- r = -EEXIST;
- goto fail;
- }
-
- if (r != DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER) {
- log_error("Failed to acquire name.");
- r = -EEXIST;
- goto fail;
- }
-
- if (_bus)
- *_bus = bus;
-
- return 0;
-
-fail:
- dbus_connection_close(bus);
- dbus_connection_unref(bus);
-
- dbus_error_free(&error);
-
- return r;
-}
-
-int main(int argc, char *argv[]) {
- int r;
- DBusConnection *bus = NULL;
- bool exiting = false;
-
- log_set_target(LOG_TARGET_AUTO);
- log_parse_environment();
- log_open();
-
- umask(0022);
-
- if (argc == 2 && streq(argv[1], "--introspect")) {
- fputs(DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE
- "<node>\n", stdout);
- fputs(hostname_interface, stdout);
- fputs("</node>\n", stdout);
- return 0;
- }
-
- if (argc != 1) {
- log_error("This program takes no arguments.");
- r = -EINVAL;
- goto finish;
- }
-
- if (!check_nss())
- log_warning("Warning: nss-myhostname is not installed. Changing the local hostname might make it unresolveable. Please install nss-myhostname!");
-
- r = read_data();
- if (r < 0) {
- log_error("Failed to read hostname data: %s", strerror(-r));
- goto finish;
- }
-
- r = connect_bus(&bus);
- if (r < 0)
- goto finish;
-
- remain_until = now(CLOCK_MONOTONIC) + DEFAULT_EXIT_USEC;
- for (;;) {
-
- if (!dbus_connection_read_write_dispatch(bus, exiting ? -1 : (int) (DEFAULT_EXIT_USEC/USEC_PER_MSEC)))
- break;
-
- if (!exiting && remain_until < now(CLOCK_MONOTONIC)) {
- exiting = true;
- bus_async_unregister_and_exit(bus, "org.freedesktop.hostname1");
- }
- }
-
- r = 0;
-
-finish:
- free_data();
-
- if (bus) {
- dbus_connection_flush(bus);
- dbus_connection_close(bus);
- dbus_connection_unref(bus);
- }
-
- return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
-}
~ianmdlvl / elogind.git / blobdiff