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Systemd/src/locale/localed.c
Lennart Poettering adacb9575a bus: introduce "trusted" bus concept and encode access control in object vtables 
Introduces a new concept of "trusted" vs. "untrusted" busses. For the
latter libsystemd-bus will automatically do per-method access control,
for the former all access is automatically granted. Per-method access
control is encoded in the vtables: by default all methods are only
accessible to privileged clients. If the SD_BUS_VTABLE_UNPRIVILEGED flag
is set for a method it is accessible to unprivileged clients too. By
default whether a client is privileged is determined via checking for
its CAP_SYS_ADMIN capability, but this can be altered via the
SD_BUS_VTABLE_CAPABILITY() macro that can be ORed into the flags field
of the method.

Writable properties are also subject to SD_BUS_VTABLE_UNPRIVILEGED and
SD_BUS_VTABLE_CAPABILITY() for controlling write access to them. Note
however that read access is unrestricted, as PropertiesChanged messages
might send out the values anyway as an unrestricted broadcast.

By default the system bus is set to "untrusted" and the user bus is
"trusted" since per-method access control on the latter is unnecessary.

On dbus1 busses we check the UID of the caller rather than the
configured capability since the capability cannot be determined without
race. On kdbus the capability is checked if possible from the attached
meta-data of a message and otherwise queried from the sending peer.

This also decorates the vtables of the various daemons we ship with
these flags.
2013-12-10 16:52:49 +00:00

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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
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>
#include "sd-bus.h"
#include "util.h"
#include "mkdir.h"
#include "strv.h"
#include "def.h"
#include "env-util.h"
#include "fileio.h"
#include "fileio-label.h"
#include "label.h"
#include "bus-util.h"
#include "bus-error.h"
#include "bus-message.h"
#include "event-util.h"
enum {
/* We don't list LC_ALL here on purpose. People should be
* using LANG instead. */
LOCALE_LANG,
LOCALE_LANGUAGE,
LOCALE_LC_CTYPE,
LOCALE_LC_NUMERIC,
LOCALE_LC_TIME,
LOCALE_LC_COLLATE,
LOCALE_LC_MONETARY,
LOCALE_LC_MESSAGES,
LOCALE_LC_PAPER,
LOCALE_LC_NAME,
LOCALE_LC_ADDRESS,
LOCALE_LC_TELEPHONE,
LOCALE_LC_MEASUREMENT,
LOCALE_LC_IDENTIFICATION,
_LOCALE_MAX
};
static const char * const names[_LOCALE_MAX] = {
[LOCALE_LANG] = "LANG",
[LOCALE_LANGUAGE] = "LANGUAGE",
[LOCALE_LC_CTYPE] = "LC_CTYPE",
[LOCALE_LC_NUMERIC] = "LC_NUMERIC",
[LOCALE_LC_TIME] = "LC_TIME",
[LOCALE_LC_COLLATE] = "LC_COLLATE",
[LOCALE_LC_MONETARY] = "LC_MONETARY",
[LOCALE_LC_MESSAGES] = "LC_MESSAGES",
[LOCALE_LC_PAPER] = "LC_PAPER",
[LOCALE_LC_NAME] = "LC_NAME",
[LOCALE_LC_ADDRESS] = "LC_ADDRESS",
[LOCALE_LC_TELEPHONE] = "LC_TELEPHONE",
[LOCALE_LC_MEASUREMENT] = "LC_MEASUREMENT",
[LOCALE_LC_IDENTIFICATION] = "LC_IDENTIFICATION"
};
typedef struct Context {
char *locale[_LOCALE_MAX];
char *x11_layout;
char *x11_model;
char *x11_variant;
char *x11_options;
char *vc_keymap;
char *vc_keymap_toggle;
Hashmap *polkit_registry;
} Context;
static int free_and_copy(char **s, const char *v) {
int r;
char *t;
assert(s);
r = strdup_or_null(isempty(v) ? NULL : v, &t);
if (r < 0)
return r;
free(*s);
*s = t;
return 0;
}
static void free_and_replace(char **s, char *v) {
free(*s);
*s = v;
}
static void context_free_x11(Context *c) {
free_and_replace(&c->x11_layout, NULL);
free_and_replace(&c->x11_model, NULL);
free_and_replace(&c->x11_variant, NULL);
free_and_replace(&c->x11_options, NULL);
}
static void context_free_vconsole(Context *c) {
free_and_replace(&c->vc_keymap, NULL);
free_and_replace(&c->vc_keymap_toggle, NULL);
}
static void context_free_locale(Context *c) {
int p;
for (p = 0; p < _LOCALE_MAX; p++)
free_and_replace(&c->locale[p], NULL);
}
static void context_free(Context *c, sd_bus *bus) {
context_free_locale(c);
context_free_x11(c);
context_free_vconsole(c);
bus_verify_polkit_async_registry_free(bus, c->polkit_registry);
};
static void locale_simplify(Context *c) {
int p;
for (p = LOCALE_LANG+1; p < _LOCALE_MAX; p++)
if (isempty(c->locale[p]) || streq_ptr(c->locale[LOCALE_LANG], c->locale[p])) {
free(c->locale[p]);
c->locale[p] = NULL;
}
}
static int locale_read_data(Context *c) {
int r;
context_free_locale(c);
r = parse_env_file("/etc/locale.conf", NEWLINE,
"LANG", &c->locale[LOCALE_LANG],
"LANGUAGE", &c->locale[LOCALE_LANGUAGE],
"LC_CTYPE", &c->locale[LOCALE_LC_CTYPE],
"LC_NUMERIC", &c->locale[LOCALE_LC_NUMERIC],
"LC_TIME", &c->locale[LOCALE_LC_TIME],
"LC_COLLATE", &c->locale[LOCALE_LC_COLLATE],
"LC_MONETARY", &c->locale[LOCALE_LC_MONETARY],
"LC_MESSAGES", &c->locale[LOCALE_LC_MESSAGES],
"LC_PAPER", &c->locale[LOCALE_LC_PAPER],
"LC_NAME", &c->locale[LOCALE_LC_NAME],
"LC_ADDRESS", &c->locale[LOCALE_LC_ADDRESS],
"LC_TELEPHONE", &c->locale[LOCALE_LC_TELEPHONE],
"LC_MEASUREMENT", &c->locale[LOCALE_LC_MEASUREMENT],
"LC_IDENTIFICATION", &c->locale[LOCALE_LC_IDENTIFICATION],
NULL);
if (r == -ENOENT) {
int p;
/* Fill in what we got passed from systemd. */
for (p = 0; p < _LOCALE_MAX; p++) {
assert(names[p]);
r = free_and_copy(&c->locale[p], getenv(names[p]));
if (r < 0)
return r;
}
r = 0;
}
locale_simplify(c);
return r;
}
static int vconsole_read_data(Context *c) {
int r;
context_free_vconsole(c);
r = parse_env_file("/etc/vconsole.conf", NEWLINE,
"KEYMAP", &c->vc_keymap,
"KEYMAP_TOGGLE", &c->vc_keymap_toggle,
NULL);
if (r < 0 && r != -ENOENT)
return r;
return 0;
}
static int x11_read_data(Context *c) {
FILE *f;
char line[LINE_MAX];
bool in_section = false;
context_free_x11(c);
f = fopen("/etc/X11/xorg.conf.d/00-keyboard.conf", "re");
if (!f)
return errno == ENOENT ? 0 : -errno;
while (fgets(line, sizeof(line), f)) {
char *l;
char_array_0(line);
l = strstrip(line);
if (l[0] == 0 || l[0] == '#')
continue;
if (in_section && first_word(l, "Option")) {
char **a;
a = strv_split_quoted(l);
if (!a) {
fclose(f);
return -ENOMEM;
}
if (strv_length(a) == 3) {
if (streq(a[1], "XkbLayout")) {
free_and_replace(&c->x11_layout, a[2]);
a[2] = NULL;
} else if (streq(a[1], "XkbModel")) {
free_and_replace(&c->x11_model, a[2]);
a[2] = NULL;
} else if (streq(a[1], "XkbVariant")) {
free_and_replace(&c->x11_variant, a[2]);
a[2] = NULL;
} else if (streq(a[1], "XkbOptions")) {
free_and_replace(&c->x11_options, a[2]);
a[2] = NULL;
}
}
strv_free(a);
} else if (!in_section && first_word(l, "Section")) {
char **a;
a = strv_split_quoted(l);
if (!a) {
fclose(f);
return -ENOMEM;
}
if (strv_length(a) == 2 && streq(a[1], "InputClass"))
in_section = true;
strv_free(a);
} else if (in_section && first_word(l, "EndSection"))
in_section = false;
}
fclose(f);
return 0;
}
static int context_read_data(Context *c) {
int r, q, p;
r = locale_read_data(c);
q = vconsole_read_data(c);
p = x11_read_data(c);
return r < 0 ? r : q < 0 ? q : p;
}
static int locale_write_data(Context *c) {
int r, p;
char **l = NULL;
r = load_env_file("/etc/locale.conf", NULL, &l);
if (r < 0 && r != -ENOENT)
return r;
for (p = 0; p < _LOCALE_MAX; p++) {
char *t, **u;
assert(names[p]);
if (isempty(c->locale[p])) {
l = strv_env_unset(l, names[p]);
continue;
}
if (asprintf(&t, "%s=%s", names[p], c->locale[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)) {
strv_free(l);
if (unlink("/etc/locale.conf") < 0)
return errno == ENOENT ? 0 : -errno;
return 0;
}
r = write_env_file_label("/etc/locale.conf", l);
strv_free(l);
return r;
}
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_bus_message_unref_ 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*, _LOCALE_MAX);
if (!l_unset)
return -ENOMEM;
l_set = new0(char*, _LOCALE_MAX);
if (!l_set)
return -ENOMEM;
for (p = 0, c_set = 0, c_unset = 0; p < _LOCALE_MAX; p++) {
assert(names[p]);
if (isempty(c->locale[p]))
l_unset[c_set++] = (char*) names[p];
else {
char *s;
if (asprintf(&s, "%s=%s", names[p], c->locale[p]) < 0)
return -ENOMEM;
l_set[c_unset++] = s;
}
}
assert(c_set + c_unset == _LOCALE_MAX);
r = sd_bus_message_new_method_call(bus,
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
"UnsetAndSetEnvironment", &m);
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("Failed to update the manager environment: %s", strerror(-r));
return 0;
}
static int vconsole_write_data(Context *c) {
int r;
_cleanup_strv_free_ char **l = NULL;
r = load_env_file("/etc/vconsole.conf", NULL, &l);
if (r < 0 && r != -ENOENT)
return r;
if (isempty(c->vc_keymap))
l = strv_env_unset(l, "KEYMAP");
else {
char *s, **u;
s = strappend("KEYMAP=", c->vc_keymap);
if (!s)
return -ENOMEM;
u = strv_env_set(l, s);
free(s);
strv_free(l);
if (!u)
return -ENOMEM;
l = u;
}
if (isempty(c->vc_keymap_toggle))
l = strv_env_unset(l, "KEYMAP_TOGGLE");
else {
char *s, **u;
s = strappend("KEYMAP_TOGGLE=", c->vc_keymap_toggle);
if (!s)
return -ENOMEM;
u = strv_env_set(l, s);
free(s);
strv_free(l);
if (!u)
return -ENOMEM;
l = u;
}
if (strv_isempty(l)) {
if (unlink("/etc/vconsole.conf") < 0)
return errno == ENOENT ? 0 : -errno;
return 0;
}
r = write_env_file_label("/etc/vconsole.conf", l);
return r;
}
static int write_data_x11(Context *c) {
_cleanup_fclose_ FILE *f = NULL;
_cleanup_free_ char *temp_path = NULL;
int r;
if (isempty(c->x11_layout) &&
isempty(c->x11_model) &&
isempty(c->x11_variant) &&
isempty(c->x11_options)) {
if (unlink("/etc/X11/xorg.conf.d/00-keyboard.conf") < 0)
return errno == ENOENT ? 0 : -errno;
return 0;
}
mkdir_p_label("/etc/X11/xorg.conf.d", 0755);
r = fopen_temporary("/etc/X11/xorg.conf.d/00-keyboard.conf", &f, &temp_path);
if (r < 0)
return r;
fchmod(fileno(f), 0644);
fputs("# Read and parsed by systemd-localed. It's probably wise not to edit this file\n"
"# manually too freely.\n"
"Section \"InputClass\"\n"
" Identifier \"system-keyboard\"\n"
" MatchIsKeyboard \"on\"\n", f);
if (!isempty(c->x11_layout))
fprintf(f, " Option \"XkbLayout\" \"%s\"\n", c->x11_layout);
if (!isempty(c->x11_model))
fprintf(f, " Option \"XkbModel\" \"%s\"\n", c->x11_model);
if (!isempty(c->x11_variant))
fprintf(f, " Option \"XkbVariant\" \"%s\"\n", c->x11_variant);
if (!isempty(c->x11_options))
fprintf(f, " Option \"XkbOptions\" \"%s\"\n", c->x11_options);
fputs("EndSection\n", f);
fflush(f);
if (ferror(f) || rename(temp_path, "/etc/X11/xorg.conf.d/00-keyboard.conf") < 0) {
r = -errno;
unlink("/etc/X11/xorg.conf.d/00-keyboard.conf");
unlink(temp_path);
return r;
} else
return 0;
}
static int vconsole_reload(sd_bus *bus) {
_cleanup_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 char *strnulldash(const char *s) {
return s == NULL || *s == 0 || (s[0] == '-' && s[1] == 0) ? NULL : (char*) s;
}
static int read_next_mapping(FILE *f, unsigned *n, char ***a) {
assert(f);
assert(n);
assert(a);
for (;;) {
char line[LINE_MAX];
char *l, **b;
errno = 0;
if (!fgets(line, sizeof(line), f)) {
if (ferror(f))
return errno ? -errno : -EIO;
return 0;
}
(*n) ++;
l = strstrip(line);
if (l[0] == 0 || l[0] == '#')
continue;
b = strv_split_quoted(l);
if (!b)
return -ENOMEM;
if (strv_length(b) < 5) {
log_error("Invalid line "SYSTEMD_KBD_MODEL_MAP":%u, ignoring.", *n);
strv_free(b);
continue;
}
*a = b;
return 1;
}
}
static int vconsole_convert_to_x11(Context *c, sd_bus *bus) {
bool modified = false;
assert(bus);
if (isempty(c->vc_keymap)) {
modified =
!isempty(c->x11_layout) ||
!isempty(c->x11_model) ||
!isempty(c->x11_variant) ||
!isempty(c->x11_options);
context_free_x11(c);
} else {
_cleanup_fclose_ FILE *f = NULL;
unsigned n = 0;
f = fopen(SYSTEMD_KBD_MODEL_MAP, "re");
if (!f)
return -errno;
for (;;) {
_cleanup_strv_free_ char **a = NULL;
int r;
r = read_next_mapping(f, &n, &a);
if (r < 0)
return r;
if (r == 0)
break;
if (!streq(c->vc_keymap, a[0]))
continue;
if (!streq_ptr(c->x11_layout, strnulldash(a[1])) ||
!streq_ptr(c->x11_model, strnulldash(a[2])) ||
!streq_ptr(c->x11_variant, strnulldash(a[3])) ||
!streq_ptr(c->x11_options, strnulldash(a[4]))) {
if (free_and_copy(&c->x11_layout, strnulldash(a[1])) < 0 ||
free_and_copy(&c->x11_model, strnulldash(a[2])) < 0 ||
free_and_copy(&c->x11_variant, strnulldash(a[3])) < 0 ||
free_and_copy(&c->x11_options, strnulldash(a[4])) < 0)
return -ENOMEM;
modified = true;
}
break;
}
}
if (modified) {
int r;
r = write_data_x11(c);
if (r < 0)
log_error("Failed to set X11 keyboard layout: %s", strerror(-r));
sd_bus_emit_properties_changed(bus,
"/org/freedesktop/locale1",
"org.freedesktop.locale1",
"X11Layout", "X11Model", "X11Variant", "X11Options", NULL);
}
return 0;
}
static int find_converted_keymap(Context *c, char **new_keymap) {
const char *dir;
_cleanup_free_ char *n;
if (c->x11_variant)
n = strjoin(c->x11_layout, "-", c->x11_variant, NULL);
else
n = strdup(c->x11_layout);
if (!n)
return -ENOMEM;
NULSTR_FOREACH(dir, KBD_KEYMAP_DIRS) {
_cleanup_free_ char *p = NULL, *pz = NULL;
p = strjoin(dir, "xkb/", n, ".map", NULL);
pz = strjoin(dir, "xkb/", n, ".map.gz", NULL);
if (!p || !pz)
return -ENOMEM;
if (access(p, F_OK) == 0 || access(pz, F_OK) == 0) {
*new_keymap = n;
n = NULL;
return 1;
}
}
return 0;
}
static int find_legacy_keymap(Context *c, char **new_keymap) {
_cleanup_fclose_ FILE *f;
unsigned n = 0;
unsigned best_matching = 0;
f = fopen(SYSTEMD_KBD_MODEL_MAP, "re");
if (!f)
return -errno;
for (;;) {
_cleanup_strv_free_ char **a = NULL;
unsigned matching = 0;
int r;
r = read_next_mapping(f, &n, &a);
if (r < 0)
return r;
if (r == 0)
break;
/* Determine how well matching this entry is */
if (streq_ptr(c->x11_layout, a[1]))
/* If we got an exact match, this is best */
matching = 10;
else {
size_t x;
x = strcspn(c->x11_layout, ",");
/* We have multiple X layouts, look for an
* entry that matches our key with everything
* but the first layout stripped off. */
if (x > 0 &&
strlen(a[1]) == x &&
strneq(c->x11_layout, a[1], x))
matching = 5;
else {
size_t w;
/* If that didn't work, strip off the
* other layouts from the entry, too */
w = strcspn(a[1], ",");
if (x > 0 && x == w &&
memcmp(c->x11_layout, a[1], x) == 0)
matching = 1;
}
}
if (matching > 0 &&
streq_ptr(c->x11_model, a[2])) {
matching++;
if (streq_ptr(c->x11_variant, a[3])) {
matching++;
if (streq_ptr(c->x11_options, a[4]))
matching++;
}
}
/* The best matching entry so far, then let's save that */
if (matching > best_matching) {
best_matching = matching;
free(*new_keymap);
*new_keymap = strdup(a[0]);
if (!*new_keymap)
return -ENOMEM;
}
}
return 0;
}
static int x11_convert_to_vconsole(Context *c, sd_bus *bus) {
bool modified = false;
int r;
assert(bus);
if (isempty(c->x11_layout)) {
modified =
!isempty(c->vc_keymap) ||
!isempty(c->vc_keymap_toggle);
context_free_x11(c);
} else {
char *new_keymap = NULL;
r = find_converted_keymap(c, &new_keymap);
if (r < 0)
return r;
else if (r == 0) {
r = find_legacy_keymap(c, &new_keymap);
if (r < 0)
return r;
}
if (!streq_ptr(c->vc_keymap, new_keymap)) {
free_and_replace(&c->vc_keymap, new_keymap);
free_and_replace(&c->vc_keymap_toggle, NULL);
modified = true;
} else
free(new_keymap);
}
if (modified) {
r = vconsole_write_data(c);
if (r < 0)
log_error("Failed to set virtual console keymap: %s", strerror(-r));
sd_bus_emit_properties_changed(bus,
"/org/freedesktop/locale1",
"org.freedesktop.locale1",
"VConsoleKeymap", "VConsoleKeymapToggle", NULL);
return vconsole_reload(bus);
}
return 0;
}
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*, _LOCALE_MAX+1);
if (!l)
return -ENOMEM;
for (p = 0, q = 0; p < _LOCALE_MAX; p++) {
char *t;
if (isempty(c->locale[p]))
continue;
if (asprintf(&t, "%s=%s", names[p], c->locale[p]) < 0)
return -ENOMEM;
l[q++] = t;
}
return sd_bus_message_append_strv(reply, l);
}
static int method_set_locale(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *error) {
Context *c = userdata;
_cleanup_strv_free_ char **l = NULL;
char **i;
int interactive;
bool modified = false;
bool passed[_LOCALE_MAX] = {};
int p;
int r;
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 so valid */
STRV_FOREACH(i, l) {
bool valid = false;
for (p = 0; p < _LOCALE_MAX; p++) {
size_t k;
k = strlen(names[p]);
if (startswith(*i, names[p]) &&
(*i)[k] == '=' &&
string_is_safe((*i) + k + 1)) {
valid = true;
passed[p] = true;
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.");
}
/* Check whether a variable is unset */
if (!modified) {
for (p = 0; p < _LOCALE_MAX; p++)
if (!isempty(c->locale[p]) && !passed[p]) {
modified = true;
break;
}
}
if (modified) {
r = bus_verify_polkit_async(bus, &c->polkit_registry, m,
"org.freedesktop.locale1.set-locale", interactive,
error, method_set_locale, c);
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 < _LOCALE_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)
return -ENOMEM;
free(c->locale[p]);
c->locale[p] = t;
break;
}
}
}
for (p = 0; p < _LOCALE_MAX; p++) {
if (passed[p])
continue;
free_and_replace(&c->locale[p], NULL);
}
locale_simplify(c);
r = locale_write_data(c);
if (r < 0) {
log_error("Failed to set locale: %s", strerror(-r));
return sd_bus_error_set_errnof(error, r, "Failed to set locale: %s", strerror(-r));
}
locale_update_system_manager(c, bus);
log_info("Changed locale information.");
sd_bus_emit_properties_changed(bus,
"/org/freedesktop/locale1",
"org.freedesktop.locale1",
"Locale", NULL);
}
return sd_bus_reply_method_return(m, NULL);
}
static int method_set_vc_keyboard(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *error) {
Context *c = userdata;
const char *keymap, *keymap_toggle;
int convert, interactive;
int r;
r = sd_bus_message_read(m, "ssbb", &keymap, &keymap_toggle, &convert, &interactive);
if (r < 0)
return r;
if (isempty(keymap))
keymap = NULL;
if (isempty(keymap_toggle))
keymap_toggle = NULL;
if (!streq_ptr(keymap, c->vc_keymap) ||
!streq_ptr(keymap_toggle, c->vc_keymap_toggle)) {
if ((keymap && (!filename_is_safe(keymap) || !string_is_safe(keymap))) ||
(keymap_toggle && (!filename_is_safe(keymap_toggle) || !string_is_safe(keymap_toggle))))
return sd_bus_error_set_errnof(error, r, "Received invalid keymap data: %s", -EINVAL);
r = bus_verify_polkit_async(bus, &c->polkit_registry, m,
"org.freedesktop.locale1.set-keyboard",
interactive, error, method_set_vc_keyboard, c);
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_copy(&c->vc_keymap, keymap) < 0 ||
free_and_copy(&c->vc_keymap_toggle, keymap_toggle) < 0)
return -ENOMEM;
r = vconsole_write_data(c);
if (r < 0) {
log_error("Failed to set virtual console keymap: %s", strerror(-r));
return sd_bus_error_set_errnof(error, r, "Failed to set virtual console keymap: %s", strerror(-r));
}
log_info("Changed virtual console keymap to '%s'", strempty(c->vc_keymap));
r = vconsole_reload(bus);
if (r < 0)
log_error("Failed to request keymap reload: %s", strerror(-r));
sd_bus_emit_properties_changed(bus,
"/org/freedesktop/locale1",
"org.freedesktop.locale1",
"VConsoleKeymap", "VConsoleKeymapToggle", NULL);
if (convert) {
r = vconsole_convert_to_x11(c, bus);
if (r < 0)
log_error("Failed to convert keymap data: %s", strerror(-r));
}
}
return sd_bus_reply_method_return(m, NULL);
}
static int method_set_x11_keyboard(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *error) {
Context *c = userdata;
const char *layout, *model, *variant, *options;
int convert, interactive;
int r;
r = sd_bus_message_read(m, "ssssbb", &layout, &model, &variant, &options, &convert, &interactive);
if (r < 0)
return r;
if (isempty(layout))
layout = NULL;
if (isempty(model))
model = NULL;
if (isempty(variant))
variant = NULL;
if (isempty(options))
options = NULL;
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, r, "Received invalid keyboard data: %s", -EINVAL);
r = bus_verify_polkit_async(bus, &c->polkit_registry, m,
"org.freedesktop.locale1.set-keyboard",
interactive, error, method_set_x11_keyboard, c);
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_copy(&c->x11_layout, layout) < 0 ||
free_and_copy(&c->x11_model, model) < 0 ||
free_and_copy(&c->x11_variant, variant) < 0 ||
free_and_copy(&c->x11_options, options) < 0)
return -ENOMEM;
r = write_data_x11(c);
if (r < 0) {
log_error("Failed to set X11 keyboard layout: %s", strerror(-r));
return sd_bus_error_set_errnof(error, r, "Failed to set X11 keyboard layout: %s", strerror(-r));
}
log_info("Changed X11 keyboard layout to '%s'", strempty(c->x11_layout));
sd_bus_emit_properties_changed(bus,
"/org/freedesktop/locale1",
"org.freedesktop.locale1",
"X11Layout" "X11Model" "X11Variant" "X11Options", NULL);
if (convert) {
r = x11_convert_to_vconsole(c, bus);
if (r < 0)
log_error("Failed to convert keymap data: %s", strerror(-r));
}
}
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_bus_unref_ sd_bus *bus = NULL;
int r;
assert(c);
assert(event);
assert(_bus);
r = sd_bus_default_system(&bus);
if (r < 0) {
log_error("Failed to get system bus connection: %s", strerror(-r));
return r;
}
r = sd_bus_add_object_vtable(bus, "/org/freedesktop/locale1", "org.freedesktop.locale1", locale_vtable, c);
if (r < 0) {
log_error("Failed to register object: %s", strerror(-r));
return r;
}
r = sd_bus_request_name(bus, "org.freedesktop.locale1", SD_BUS_NAME_REPLACE_EXISTING|SD_BUS_NAME_DO_NOT_QUEUE);
if (r < 0) {
log_error("Failed to register name: %s", strerror(-r));
return r;
}
r = sd_bus_attach_event(bus, event, 0);
if (r < 0) {
log_error("Failed to attach bus to event loop: %s", strerror(-r));
return r;
}
*_bus = bus;
bus = NULL;
return 0;
}
int main(int argc, char *argv[]) {
Context context = {};
_cleanup_event_unref_ sd_event *event = NULL;
_cleanup_bus_unref_ sd_bus *bus = NULL;
int r;
log_set_target(LOG_TARGET_AUTO);
log_parse_environment();
log_open();
umask(0022);
label_init("/etc");
if (argc != 1) {
log_error("This program takes no arguments.");
r = -EINVAL;
goto finish;
}
r = sd_event_default(&event);
if (r < 0) {
log_error("Failed to allocate event loop: %s", strerror(-r));
goto finish;
}
r = connect_bus(&context, event, &bus);
if (r < 0)
goto finish;
r = context_read_data(&context);
if (r < 0) {
log_error("Failed to read locale data: %s", strerror(-r));
goto finish;
}
r = bus_event_loop_with_idle(event, bus, "org.freedesktop.locale1", DEFAULT_EXIT_USEC);
if (r < 0) {
log_error("Failed to run event loop: %s", strerror(-r));
goto finish;
}
r = 0;
finish:
context_free(&context, bus);
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}
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