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Systemd/src/locale/localed.c

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/***
This file is part of systemd.
Copyright 2011 Lennart Poettering
Copyright 2013 Kay Sievers
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 <errno.h>
#include <string.h>
#include <unistd.h>
#if HAVE_XKBCOMMON
#include <xkbcommon/xkbcommon.h>
#include <dlfcn.h>
#endif
#include "sd-bus.h"
#include "alloc-util.h"
#include "bus-error.h"
#include "bus-message.h"
#include "bus-util.h"
#include "def.h"
#include "keymap-util.h"
#include "locale-util.h"
#include "macro.h"
#include "path-util.h"
#include "selinux-util.h"
#include "string-util.h"
#include "strv.h"
#include "user-util.h"
static Hashmap *polkit_registry = NULL;
static int locale_update_system_manager(Context *c, sd_bus *bus) {
_cleanup_free_ char **l_unset = NULL;
_cleanup_strv_free_ char **l_set = NULL;
_cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
sd_bus_error error = SD_BUS_ERROR_NULL;
unsigned c_set, c_unset, p;
int r;
assert(bus);
l_unset = new0(char*, _VARIABLE_LC_MAX);
if (!l_unset)
return -ENOMEM;
l_set = new0(char*, _VARIABLE_LC_MAX);
if (!l_set)
return -ENOMEM;
for (p = 0, c_set = 0, c_unset = 0; p < _VARIABLE_LC_MAX; p++) {
const char *name;
name = locale_variable_to_string(p);
assert(name);
if (isempty(c->locale[p]))
l_unset[c_set++] = (char*) name;
else {
char *s;
if (asprintf(&s, "%s=%s", name, c->locale[p]) < 0)
return -ENOMEM;
l_set[c_unset++] = s;
}
}
assert(c_set + c_unset == _VARIABLE_LC_MAX);
r = sd_bus_message_new_method_call(bus, &m,
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
"UnsetAndSetEnvironment");
if (r < 0)
return r;
r = sd_bus_message_append_strv(m, l_unset);
if (r < 0)
return r;
r = sd_bus_message_append_strv(m, l_set);
if (r < 0)
return r;
r = sd_bus_call(bus, m, 0, &error, NULL);
if (r < 0)
log_error_errno(r, "Failed to update the manager environment: %m");
return 0;
}
static int vconsole_reload(sd_bus *bus) {
_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
int r;
assert(bus);
r = sd_bus_call_method(bus,
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
"RestartUnit",
&error,
NULL,
"ss", "systemd-vconsole-setup.service", "replace");
if (r < 0)
log_error("Failed to issue method call: %s", bus_error_message(&error, -r));
return r;
}
static int vconsole_convert_to_x11_and_emit(Context *c, sd_bus *bus) {
int r;
assert(bus);
r = vconsole_convert_to_x11(c);
if (r <= 0)
return r;
/* modified */
r = x11_write_data(c);
if (r < 0)
return log_error_errno(r, "Failed to write X11 keyboard layout: %m");
sd_bus_emit_properties_changed(bus,
"/org/freedesktop/locale1",
"org.freedesktop.locale1",
"X11Layout", "X11Model", "X11Variant", "X11Options", NULL);
return 1;
}
static int x11_convert_to_vconsole_and_emit(Context *c, sd_bus *bus) {
int r;
assert(bus);
r = x11_convert_to_vconsole(c);
if (r <= 0)
return r;
/* modified */
r = vconsole_write_data(c);
if (r < 0)
log_error_errno(r, "Failed to save virtual console keymap: %m");
sd_bus_emit_properties_changed(bus,
"/org/freedesktop/locale1",
"org.freedesktop.locale1",
"VConsoleKeymap", "VConsoleKeymapToggle", NULL);
return vconsole_reload(bus);
}
static int property_get_locale(
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;
_cleanup_strv_free_ char **l = NULL;
int p, q;
l = new0(char*, _VARIABLE_LC_MAX+1);
if (!l)
return -ENOMEM;
for (p = 0, q = 0; p < _VARIABLE_LC_MAX; p++) {
char *t;
const char *name;
name = locale_variable_to_string(p);
assert(name);
if (isempty(c->locale[p]))
continue;
if (asprintf(&t, "%s=%s", name, c->locale[p]) < 0)
return -ENOMEM;
l[q++] = t;
}
return sd_bus_message_append_strv(reply, l);
}
static int method_set_locale(sd_bus_message *m, void *userdata, sd_bus_error *error) {
Context *c = userdata;
_cleanup_strv_free_ char **l = NULL;
char **i;
const char *lang = NULL;
int interactive;
bool modified = false;
bool have[_VARIABLE_LC_MAX] = {};
int p;
int r;
assert(m);
assert(c);
r = bus_message_read_strv_extend(m, &l);
if (r < 0)
return r;
r = sd_bus_message_read_basic(m, 'b', &interactive);
if (r < 0)
return r;
/* Check whether a variable changed and if it is valid */
STRV_FOREACH(i, l) {
bool valid = false;
for (p = 0; p < _VARIABLE_LC_MAX; p++) {
size_t k;
const char *name;
name = locale_variable_to_string(p);
assert(name);
k = strlen(name);
if (startswith(*i, name) &&
(*i)[k] == '=' &&
locale_is_valid((*i) + k + 1)) {
valid = true;
have[p] = true;
if (p == VARIABLE_LANG)
lang = (*i) + k + 1;
if (!streq_ptr(*i + k + 1, c->locale[p]))
modified = true;
break;
}
}
if (!valid)
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid Locale data.");
}
/* If LANG was specified, but not LANGUAGE, check if we should
* set it based on the language fallback table. */
if (have[VARIABLE_LANG] && !have[VARIABLE_LANGUAGE]) {
_cleanup_free_ char *language = NULL;
assert(lang);
(void) find_language_fallback(lang, &language);
if (language) {
log_debug("Converted LANG=%s to LANGUAGE=%s", lang, language);
if (!streq_ptr(language, c->locale[VARIABLE_LANGUAGE])) {
r = strv_extendf(&l, "LANGUAGE=%s", language);
if (r < 0)
return r;
have[VARIABLE_LANGUAGE] = true;
modified = true;
}
}
}
/* Check whether a variable is unset */
if (!modified)
for (p = 0; p < _VARIABLE_LC_MAX; p++)
if (!isempty(c->locale[p]) && !have[p]) {
modified = true;
break;
}
if (modified) {
_cleanup_strv_free_ char **settings = NULL;
r = bus_verify_polkit_async(
m,
CAP_SYS_ADMIN,
"org.freedesktop.locale1.set-locale",
NULL,
interactive,
UID_INVALID,
&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 */
STRV_FOREACH(i, l)
for (p = 0; p < _VARIABLE_LC_MAX; p++) {
size_t k;
const char *name;
name = locale_variable_to_string(p);
assert(name);
k = strlen(name);
if (startswith(*i, name) && (*i)[k] == '=') {
r = free_and_strdup(&c->locale[p], *i + k + 1);
if (r < 0)
return r;
break;
}
}
for (p = 0; p < _VARIABLE_LC_MAX; p++) {
if (have[p])
continue;
c->locale[p] = mfree(c->locale[p]);
}
locale_simplify(c);
r = locale_write_data(c, &settings);
if (r < 0) {
log_error_errno(r, "Failed to set locale: %m");
return sd_bus_error_set_errnof(error, r, "Failed to set locale: %m");
}
locale_update_system_manager(c, sd_bus_message_get_bus(m));
if (settings) {
_cleanup_free_ char *line;
line = strv_join(settings, ", ");
log_info("Changed locale to %s.", strnull(line));
} else
log_info("Changed locale to unset.");
(void) sd_bus_emit_properties_changed(
sd_bus_message_get_bus(m),
"/org/freedesktop/locale1",
"org.freedesktop.locale1",
"Locale", NULL);
} else
log_debug("Locale settings were not modified.");
return sd_bus_reply_method_return(m, NULL);
}
static int method_set_vc_keyboard(sd_bus_message *m, void *userdata, sd_bus_error *error) {
Context *c = userdata;
const char *keymap, *keymap_toggle;
int convert, interactive;
int r;
assert(m);
assert(c);
r = sd_bus_message_read(m, "ssbb", &keymap, &keymap_toggle, &convert, &interactive);
if (r < 0)
return r;
keymap = empty_to_null(keymap);
keymap_toggle = empty_to_null(keymap_toggle);
if (!streq_ptr(keymap, c->vc_keymap) ||
!streq_ptr(keymap_toggle, c->vc_keymap_toggle)) {
if ((keymap && (!filename_is_valid(keymap) || !string_is_safe(keymap))) ||
(keymap_toggle && (!filename_is_valid(keymap_toggle) || !string_is_safe(keymap_toggle))))
return sd_bus_error_set_errnof(error, -EINVAL, "Received invalid keymap data");
r = bus_verify_polkit_async(
m,
CAP_SYS_ADMIN,
"org.freedesktop.locale1.set-keyboard",
NULL,
interactive,
UID_INVALID,
&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 */
if (free_and_strdup(&c->vc_keymap, keymap) < 0 ||
free_and_strdup(&c->vc_keymap_toggle, keymap_toggle) < 0)
return -ENOMEM;
r = vconsole_write_data(c);
if (r < 0) {
log_error_errno(r, "Failed to set virtual console keymap: %m");
return sd_bus_error_set_errnof(error, r, "Failed to set virtual console keymap: %m");
}
log_info("Changed virtual console keymap to '%s' toggle '%s'",
strempty(c->vc_keymap), strempty(c->vc_keymap_toggle));
r = vconsole_reload(sd_bus_message_get_bus(m));
if (r < 0)
log_error_errno(r, "Failed to request keymap reload: %m");
(void) sd_bus_emit_properties_changed(
sd_bus_message_get_bus(m),
"/org/freedesktop/locale1",
"org.freedesktop.locale1",
"VConsoleKeymap", "VConsoleKeymapToggle", NULL);
if (convert) {
r = vconsole_convert_to_x11_and_emit(c, sd_bus_message_get_bus(m));
if (r < 0)
log_error_errno(r, "Failed to convert keymap data: %m");
}
}
return sd_bus_reply_method_return(m, NULL);
}
#if HAVE_XKBCOMMON
_printf_(3, 0)
static void log_xkb(struct xkb_context *ctx, enum xkb_log_level lvl, const char *format, va_list args) {
const char *fmt;
fmt = strjoina("libxkbcommon: ", format);
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wformat-nonliteral"
log_internalv(LOG_DEBUG, 0, __FILE__, __LINE__, __func__, fmt, args);
#pragma GCC diagnostic pop
}
#define LOAD_SYMBOL(symbol, dl, name) \
({ \
(symbol) = (typeof(symbol)) dlvsym((dl), (name), "V_0.5.0"); \
(symbol) ? 0 : -EOPNOTSUPP; \
})
static int verify_xkb_rmlvo(const char *model, const char *layout, const char *variant, const char *options) {
/* We dlopen() the library in order to make the dependency soft. The library (and what it pulls in) is huge
* after all, hence let's support XKB maps when the library is around, and refuse otherwise. The function
* pointers to the shared library are below: */
struct xkb_context* (*symbol_xkb_context_new)(enum xkb_context_flags flags) = NULL;
void (*symbol_xkb_context_unref)(struct xkb_context *context) = NULL;
void (*symbol_xkb_context_set_log_fn)(struct xkb_context *context, void (*log_fn)(struct xkb_context *context, enum xkb_log_level level, const char *format, va_list args)) = NULL;
struct xkb_keymap* (*symbol_xkb_keymap_new_from_names)(struct xkb_context *context, const struct xkb_rule_names *names, enum xkb_keymap_compile_flags flags) = NULL;
void (*symbol_xkb_keymap_unref)(struct xkb_keymap *keymap) = NULL;
const struct xkb_rule_names rmlvo = {
.model = model,
.layout = layout,
.variant = variant,
.options = options,
};
struct xkb_context *ctx = NULL;
struct xkb_keymap *km = NULL;
void *dl;
int r;
/* Compile keymap from RMLVO information to check out its validity */
dl = dlopen("libxkbcommon.so.0", RTLD_LAZY);
if (!dl)
return -EOPNOTSUPP;
r = LOAD_SYMBOL(symbol_xkb_context_new, dl, "xkb_context_new");
if (r < 0)
goto finish;
r = LOAD_SYMBOL(symbol_xkb_context_unref, dl, "xkb_context_unref");
if (r < 0)
goto finish;
r = LOAD_SYMBOL(symbol_xkb_context_set_log_fn, dl, "xkb_context_set_log_fn");
if (r < 0)
goto finish;
r = LOAD_SYMBOL(symbol_xkb_keymap_new_from_names, dl, "xkb_keymap_new_from_names");
if (r < 0)
goto finish;
r = LOAD_SYMBOL(symbol_xkb_keymap_unref, dl, "xkb_keymap_unref");
if (r < 0)
goto finish;
ctx = symbol_xkb_context_new(XKB_CONTEXT_NO_ENVIRONMENT_NAMES);
if (!ctx) {
r = -ENOMEM;
goto finish;
}
symbol_xkb_context_set_log_fn(ctx, log_xkb);
km = symbol_xkb_keymap_new_from_names(ctx, &rmlvo, XKB_KEYMAP_COMPILE_NO_FLAGS);
if (!km) {
r = -EINVAL;
goto finish;
}
r = 0;
finish:
if (symbol_xkb_keymap_unref && km)
symbol_xkb_keymap_unref(km);
if (symbol_xkb_context_unref && ctx)
symbol_xkb_context_unref(ctx);
(void) dlclose(dl);
return r;
}
#else
static int verify_xkb_rmlvo(const char *model, const char *layout, const char *variant, const char *options) {
return 0;
}
#endif
static int method_set_x11_keyboard(sd_bus_message *m, void *userdata, sd_bus_error *error) {
Context *c = userdata;
const char *layout, *model, *variant, *options;
int convert, interactive;
int r;
assert(m);
assert(c);
r = sd_bus_message_read(m, "ssssbb", &layout, &model, &variant, &options, &convert, &interactive);
if (r < 0)
return r;
layout = empty_to_null(layout);
model = empty_to_null(model);
variant = empty_to_null(variant);
options = empty_to_null(options);
if (!streq_ptr(layout, c->x11_layout) ||
!streq_ptr(model, c->x11_model) ||
!streq_ptr(variant, c->x11_variant) ||
!streq_ptr(options, c->x11_options)) {
if ((layout && !string_is_safe(layout)) ||
(model && !string_is_safe(model)) ||
(variant && !string_is_safe(variant)) ||
(options && !string_is_safe(options)))
return sd_bus_error_set_errnof(error, -EINVAL, "Received invalid keyboard data");
r = bus_verify_polkit_async(
m,
CAP_SYS_ADMIN,
"org.freedesktop.locale1.set-keyboard",
NULL,
interactive,
UID_INVALID,
&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 = verify_xkb_rmlvo(model, layout, variant, options);
if (r < 0) {
log_error_errno(r, "Cannot compile XKB keymap for new x11 keyboard layout ('%s' / '%s' / '%s' / '%s'): %m",
strempty(model), strempty(layout), strempty(variant), strempty(options));
if (r == -EOPNOTSUPP)
return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Local keyboard configuration not supported on this system.");
return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Specified keymap cannot be compiled, refusing as invalid.");
}
if (free_and_strdup(&c->x11_layout, layout) < 0 ||
free_and_strdup(&c->x11_model, model) < 0 ||
free_and_strdup(&c->x11_variant, variant) < 0 ||
free_and_strdup(&c->x11_options, options) < 0)
return -ENOMEM;
r = x11_write_data(c);
if (r < 0) {
log_error_errno(r, "Failed to set X11 keyboard layout: %m");
return sd_bus_error_set_errnof(error, r, "Failed to set X11 keyboard layout: %m");
}
log_info("Changed X11 keyboard layout to '%s' model '%s' variant '%s' options '%s'",
strempty(c->x11_layout),
strempty(c->x11_model),
strempty(c->x11_variant),
strempty(c->x11_options));
(void) sd_bus_emit_properties_changed(
sd_bus_message_get_bus(m),
"/org/freedesktop/locale1",
"org.freedesktop.locale1",
"X11Layout", "X11Model", "X11Variant", "X11Options", NULL);
if (convert) {
r = x11_convert_to_vconsole_and_emit(c, sd_bus_message_get_bus(m));
if (r < 0)
log_error_errno(r, "Failed to convert keymap data: %m");
}
}
return sd_bus_reply_method_return(m, NULL);
}
static const sd_bus_vtable locale_vtable[] = {
SD_BUS_VTABLE_START(0),
SD_BUS_PROPERTY("Locale", "as", property_get_locale, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
SD_BUS_PROPERTY("X11Layout", "s", NULL, offsetof(Context, x11_layout), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
SD_BUS_PROPERTY("X11Model", "s", NULL, offsetof(Context, x11_model), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
SD_BUS_PROPERTY("X11Variant", "s", NULL, offsetof(Context, x11_variant), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
SD_BUS_PROPERTY("X11Options", "s", NULL, offsetof(Context, x11_options), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
SD_BUS_PROPERTY("VConsoleKeymap", "s", NULL, offsetof(Context, vc_keymap), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
SD_BUS_PROPERTY("VConsoleKeymapToggle", "s", NULL, offsetof(Context, vc_keymap_toggle), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
SD_BUS_METHOD("SetLocale", "asb", NULL, method_set_locale, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("SetVConsoleKeyboard", "ssbb", NULL, method_set_vc_keyboard, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("SetX11Keyboard", "ssssbb", NULL, method_set_x11_keyboard, 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/locale1", "org.freedesktop.locale1", locale_vtable, c);
if (r < 0)
return log_error_errno(r, "Failed to register object: %m");
r = sd_bus_request_name(bus, "org.freedesktop.locale1", 0);
if (r < 0)
return log_error_errno(r, "Failed to register 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 = bus;
bus = NULL;
return 0;
}
int main(int argc, char *argv[]) {
_cleanup_(context_free) Context context = {};
_cleanup_(sd_event_unrefp) sd_event *event = NULL;
_cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
int r;
log_set_target(LOG_TARGET_AUTO);
log_parse_environment();
log_open();
umask(0022);
mac_selinux_init();
if (argc != 1) {
log_error("This program takes no arguments.");
r = -EINVAL;
goto finish;
}
r = sd_event_default(&event);
if (r < 0) {
log_error_errno(r, "Failed to allocate event loop: %m");
goto finish;
}
sd_event_set_watchdog(event, true);
r = connect_bus(&context, event, &bus);
if (r < 0)
goto finish;
r = context_read_data(&context);
if (r < 0) {
log_error_errno(r, "Failed to read locale data: %m");
goto finish;
}
r = bus_event_loop_with_idle(event, bus, "org.freedesktop.locale1", DEFAULT_EXIT_USEC, NULL, NULL);
if (r < 0)
log_error_errno(r, "Failed to run event loop: %m");
finish:
bus_verify_polkit_async_registry_free(polkit_registry);
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}
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