#include <dbus/dbus.h>

#include <errno.h>

#include <string.h>

#include <unistd.h>

#include "util.h"

#include "strv.h"

#include "dbus-common.h"

#include "polkit.h"

#define INTROSPECTION \

DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE \

"<node>\n" \

" <interface name=\"org.freedesktop.locale1\">\n" \

" <property name=\"Locale\" type=\"as\" access=\"read\"/>\n" \

" <method name=\"SetLocale\">\n" \

" <arg name=\"locale\" type=\"as\" direction=\"in\"/>\n" \

" <arg name=\"user_interaction\" type=\"b\" direction=\"in\"/>\n" \

" </method>\n" \

" </interface>\n" \

BUS_PROPERTIES_INTERFACE \

BUS_INTROSPECTABLE_INTERFACE \

BUS_PEER_INTERFACE \

"</node>\n"

#define INTERFACES_LIST \

BUS_GENERIC_INTERFACES_LIST \

"org.freedesktop.locale1\0"

enum {

/* We don't list LC_ALL here on purpose. People should be

PROP_LANG,

PROP_LC_CTYPE,

PROP_LC_NUMERIC,

PROP_LC_TIME,

PROP_LC_COLLATE,

PROP_LC_MONETARY,

PROP_LC_MESSAGES,

PROP_LC_PAPER,

PROP_LC_NAME,

PROP_LC_ADDRESS,

PROP_LC_TELEPHONE,

PROP_LC_MEASUREMENT,

PROP_LC_IDENTIFICATION,

_PROP_MAX

};

static const char * const names[_PROP_MAX] = {

[PROP_LANG] = "LANG",

[PROP_LC_CTYPE] = "LC_CTYPE",

[PROP_LC_NUMERIC] = "LC_NUMERIC",

[PROP_LC_TIME] = "LC_TIME",

[PROP_LC_COLLATE] = "LC_COLLATE",

[PROP_LC_MONETARY] = "LC_MONETARY",

[PROP_LC_MESSAGES] = "LC_MESSAGES",

[PROP_LC_PAPER] = "LC_PAPER",

[PROP_LC_NAME] = "LC_NAME",

[PROP_LC_ADDRESS] = "LC_ADDRESS",

[PROP_LC_TELEPHONE] = "LC_TELEPHONE",

[PROP_LC_MEASUREMENT] = "LC_MEASUREMENT",

[PROP_LC_IDENTIFICATION] = "LC_IDENTIFICATION"

};

static char *data[_PROP_MAX] = {

NULL,

NULL,

NULL,

NULL,

NULL,

NULL,

NULL,

NULL,

NULL,

NULL,

NULL,

NULL,

NULL

};

static void free_data(void) {

int p;

for (p = 0; p < _PROP_MAX; p++) {

free(data[p]);

data[p] = NULL;

}

}

static void simplify(void) {

int p;

for (p = 1; p < _PROP_MAX; p++)

if (isempty(data[p]) || streq_ptr(data[PROP_LANG], data[p])) {

free(data[p]);

data[p] = NULL;

}

}

static int read_data(void) {

int r;

free_data();

r = parse_env_file("/etc/locale.conf", NEWLINE,

"LANG", &data[PROP_LANG],

"LC_CTYPE", &data[PROP_LC_CTYPE],

"LC_NUMERIC", &data[PROP_LC_NUMERIC],

"LC_TIME", &data[PROP_LC_TIME],

"LC_COLLATE", &data[PROP_LC_COLLATE],

"LC_MONETARY", &data[PROP_LC_MONETARY],

"LC_MESSAGES", &data[PROP_LC_MESSAGES],

"LC_PAPER", &data[PROP_LC_PAPER],

"LC_NAME", &data[PROP_LC_NAME],

"LC_ADDRESS", &data[PROP_LC_ADDRESS],

"LC_TELEPHONE", &data[PROP_LC_TELEPHONE],

"LC_MEASUREMENT", &data[PROP_LC_MEASUREMENT],

"LC_IDENTIFICATION", &data[PROP_LC_IDENTIFICATION],

NULL);

if (r == -ENOENT) {

int p;

/* Fill in what we got passed from systemd. */

for (p = 0; p < _PROP_MAX; p++) {

char *e, *d;

assert(names[p]);

e = getenv(names[p]);

if (e) {

d = strdup(e);

if (!d)

return -ENOMEM;

} else

d = NULL;

free(data[p]);

data[p] = d;

}

r = 0;

}

simplify();

return r;

}

static int write_data(void) {

int r, p;

char **l = NULL;

r = load_env_file("/etc/locale.conf", &l);

if (r < 0 && r != -ENOENT)

return r;

for (p = 0; p < _PROP_MAX; p++) {

char *t, **u;

assert(names[p]);

if (isempty(data[p])) {

l = strv_env_unset(l, names[p]);

continue;

}

if (asprintf(&t, "%s=%s", names[p], 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/locale.conf") < 0)

return errno == ENOENT ? 0 : -errno;

return 0;

}

r = write_env_file("/etc/locale.conf", l);

strv_free(l);

return r;

}

static void push_data(DBusConnection *bus) {

char **l_set = NULL, **l_unset = NULL, **t;

int c_set = 0, c_unset = 0, p;

DBusError error;

DBusMessage *m = NULL, *reply = NULL;

DBusMessageIter iter, sub;

dbus_error_init(&error);

assert(bus);

l_set = new0(char*, _PROP_MAX);

l_unset = new0(char*, _PROP_MAX);

if (!l_set || !l_unset) {

log_error("Out of memory");

goto finish;

}

for (p = 0; p < _PROP_MAX; p++) {

assert(names[p]);

if (isempty(data[p]))

l_unset[c_set++] = (char*) names[p];

else {

char *s;

if (asprintf(&s, "%s=%s", names[p], data[p]) < 0) {

log_error("Out of memory");

goto finish;

}

l_set[c_unset++] = s;

}

}

assert(c_set + c_unset == _PROP_MAX);

m = dbus_message_new_method_call("org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "UnsetAndSetEnvironment");

if (!m) {

log_error("Could not allocate message.");

goto finish;

}

dbus_message_iter_init_append(m, &iter);

if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "s", &sub)) {

log_error("Out of memory.");

goto finish;

}

STRV_FOREACH(t, l_unset)

if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, t)) {

log_error("Out of memory.");

goto finish;

}

if (!dbus_message_iter_close_container(&iter, &sub) ||

!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "s", &sub)) {

log_error("Out of memory.");

goto finish;

}

STRV_FOREACH(t, l_set)

if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, t)) {

log_error("Out of memory.");

goto finish;

}

if (!dbus_message_iter_close_container(&iter, &sub)) {

log_error("Out of memory.");

goto finish;

}

reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error);

if (!reply) {

log_error("Failed to set locale information: %s", bus_error_message(&error));

goto finish;

}

finish:

if (m)

dbus_message_unref(m);

if (reply)

dbus_message_unref(reply);

dbus_error_free(&error);

strv_free(l_set);

free(l_unset);

}

static int append_locale(DBusMessageIter *i, const char *property, void *userdata) {

int r, c = 0, p;

char **l;

l = new0(char*, _PROP_MAX+1);

if (!l)

return -ENOMEM;

for (p = 0; p < _PROP_MAX; p++) {

char *t;

if (isempty(data[p]))

continue;

if (asprintf(&t, "%s=%s", names[p], data[p]) < 0) {

strv_free(l);

return -ENOMEM;

}

l[c++] = t;

}

r = bus_property_append_strv(i, property, (void*) l);

strv_free(l);

return r;

}

static DBusHandlerResult locale_message_handler(

DBusConnection *connection,

DBusMessage *message,

void *userdata) {

const BusProperty properties[] = {

{ "org.freedesktop.locale1", "Locale", append_locale, "as", NULL},

{ 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.locale1", "SetLocale")) {

char **l = NULL, **i;

dbus_bool_t interactive;

DBusMessageIter iter;

bool modified = false;

bool passed[_PROP_MAX];

int p;

if (!dbus_message_iter_init(message, &iter))

return bus_send_error_reply(connection, message, NULL, -EINVAL);

r = bus_parse_strv_iter(&iter, &l);

if (r < 0) {

if (r == -ENOMEM)

goto oom;

return bus_send_error_reply(connection, message, NULL, r);

}

if (!dbus_message_iter_next(&iter) ||

dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_BOOLEAN) {

strv_free(l);

return bus_send_error_reply(connection, message, NULL, -EINVAL);

}

dbus_message_iter_get_basic(&iter, &interactive);

zero(passed);

/* Check whether a variable changed and if so valid */

STRV_FOREACH(i, l) {

bool valid = false;

for (p = 0; p < _PROP_MAX; p++) {

size_t k;

k = strlen(names[p]);

if (startswith(*i, names[p]) && (*i)[k] == '=') {

valid = true;

passed[p] = true;

if (!streq_ptr(*i + k + 1, data[p]))

modified = true;

break;

}

}

if (!valid) {

strv_free(l);

return bus_send_error_reply(connection, message, NULL, -EINVAL);

}

}

/* Check whether a variable is unset */

if (!modified) {

for (p = 0; p < _PROP_MAX; p++)

if (!isempty(data[p]) && !passed[p]) {

modified = true;

break;

}

}

if (modified) {

r = verify_polkit(connection, message, "org.freedesktop.locale1.set-locale", interactive, &error);

if (r < 0) {

strv_free(l);

return bus_send_error_reply(connection, message, &error, r);

}

STRV_FOREACH(i, l) {

for (p = 0; p < _PROP_MAX; p++) {

size_t k;

k = strlen(names[p]);

if (startswith(*i, names[p]) && (*i)[k] == '=') {

char *t;

t = strdup(*i + k + 1);

if (!t) {

strv_free(l);

goto oom;

}

free(data[p]);

data[p] = t;

break;

}

}

}

for (p = 0; p < _PROP_MAX; p++) {

if (passed[p])

continue;

free(data[p]);

data[p] = NULL;

}

simplify();

r = write_data();

if (r < 0) {

log_error("Failed to set locale: %s", strerror(-r));

return bus_send_error_reply(connection, message, NULL, r);

}

push_data(connection);

log_info("Changed locale information.");

changed = bus_properties_changed_new(

"/org/freedesktop/locale1",

"org.freedesktop.locale1",

"Locale\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 locale_vtable = {

.message_function = locale_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", error.message);

r = -ECONNREFUSED;

goto fail;

}

if (!dbus_connection_register_object_path(bus, "/org/freedesktop/locale1", &locale_vtable, NULL)) {

log_error("Not enough memory");

r = -ENOMEM;

goto fail;

}

if (dbus_bus_request_name(bus, "org.freedesktop.locale1", DBUS_NAME_FLAG_DO_NOT_QUEUE, &error) < 0) {

log_error("Failed to register name on bus: %s", error.message);

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;

log_set_target(LOG_TARGET_AUTO);

log_parse_environment();

log_open();

if (argc != 1) {

log_error("This program takes no arguments.");

r = -EINVAL;

goto finish;

}

umask(0022);

r = read_data();

if (r < 0) {

log_error("Failed to read locale data: %s", strerror(-r));

goto finish;

}

r = connect_bus(&bus);

if (r < 0)

goto finish;

while (dbus_connection_read_write_dispatch(bus, -1))

;

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;

}