diff options
Diffstat (limited to 'src/hostname/hostnamed.c')
| -rw-r--r-- | src/hostname/hostnamed.c | 636 |
1 files changed, 0 insertions, 636 deletions
diff --git a/src/hostname/hostnamed.c b/src/hostname/hostnamed.c deleted file mode 100644 index cd3ef491ac..0000000000 --- a/src/hostname/hostnamed.c +++ /dev/null @@ -1,636 +0,0 @@ -/*-*- 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 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. - - 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser 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 const BusProperty bus_hostname_properties[] = { - { "Hostname", bus_property_append_string, "s", sizeof(data[0])*PROP_HOSTNAME, true }, - { "StaticHostname", bus_property_append_string, "s", sizeof(data[0])*PROP_STATIC_HOSTNAME, true }, - { "PrettyHostname", bus_property_append_string, "s", sizeof(data[0])*PROP_PRETTY_HOSTNAME, true }, - { "IconName", bus_hostname_append_icon_name, "s", sizeof(data[0])*PROP_ICON_NAME, true }, - { NULL, } -}; - -static const BusBoundProperties bps[] = { - { "org.freedesktop.hostname1", bus_hostname_properties, data }, - { NULL, } -}; - -static DBusHandlerResult hostname_message_handler( - DBusConnection *connection, - DBusMessage *message, - void *userdata) { - - - 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, NULL, &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, NULL, &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, NULL, &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; - - /* The icon name might ultimately be - * used as file name, so better be - * safe than sorry */ - if (k == PROP_ICON_NAME && !filename_is_safe(name)) - return bus_send_error_reply(connection, message, NULL, -EINVAL); - if (k == PROP_PRETTY_HOSTNAME && !string_is_safe(name)) - return bus_send_error_reply(connection, message, NULL, -EINVAL); - - 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, bps); - - 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)) { - r = log_oom(); - 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; -} |