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Systemd/src/locale/keymap-util.c

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/* SPDX-License-Identifier: LGPL-2.1+ */
/***
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 <stdio_ext.h>
#include <string.h>
#include <unistd.h>
#include "def.h"
#include "env-util.h"
#include "fd-util.h"
#include "fileio-label.h"
#include "fileio.h"
#include "keymap-util.h"
#include "locale-util.h"
#include "macro.h"
#include "mkdir.h"
#include "string-util.h"
#include "strv.h"
static bool startswith_comma(const char *s, const char *prefix) {
s = startswith(s, prefix);
if (!s)
return false;
return IN_SET(*s, ',', '\0');
}
static const char* strnulldash(const char *s) {
return isempty(s) || streq(s, "-") ? NULL : s;
}
static const char* systemd_kbd_model_map(void) {
const char* s;
s = getenv("SYSTEMD_KBD_MODEL_MAP");
if (s)
return s;
return SYSTEMD_KBD_MODEL_MAP;
}
static const char* systemd_language_fallback_map(void) {
const char* s;
s = getenv("SYSTEMD_LANGUAGE_FALLBACK_MAP");
if (s)
return s;
return SYSTEMD_LANGUAGE_FALLBACK_MAP;
}
static void context_free_x11(Context *c) {
c->x11_layout = mfree(c->x11_layout);
c->x11_options = mfree(c->x11_options);
c->x11_model = mfree(c->x11_model);
c->x11_variant = mfree(c->x11_variant);
}
static void context_free_vconsole(Context *c) {
c->vc_keymap = mfree(c->vc_keymap);
c->vc_keymap_toggle = mfree(c->vc_keymap_toggle);
}
static void context_free_locale(Context *c) {
int p;
for (p = 0; p < _VARIABLE_LC_MAX; p++)
c->locale[p] = mfree(c->locale[p]);
}
void context_free(Context *c) {
context_free_locale(c);
context_free_x11(c);
context_free_vconsole(c);
};
void locale_simplify(Context *c) {
int p;
for (p = VARIABLE_LANG+1; p < _VARIABLE_LC_MAX; p++)
if (isempty(c->locale[p]) || streq_ptr(c->locale[VARIABLE_LANG], c->locale[p]))
c->locale[p] = mfree(c->locale[p]);
}
static int locale_read_data(Context *c) {
int r;
context_free_locale(c);
r = parse_env_file("/etc/locale.conf", NEWLINE,
"LANG", &c->locale[VARIABLE_LANG],
"LANGUAGE", &c->locale[VARIABLE_LANGUAGE],
"LC_CTYPE", &c->locale[VARIABLE_LC_CTYPE],
"LC_NUMERIC", &c->locale[VARIABLE_LC_NUMERIC],
"LC_TIME", &c->locale[VARIABLE_LC_TIME],
"LC_COLLATE", &c->locale[VARIABLE_LC_COLLATE],
"LC_MONETARY", &c->locale[VARIABLE_LC_MONETARY],
"LC_MESSAGES", &c->locale[VARIABLE_LC_MESSAGES],
"LC_PAPER", &c->locale[VARIABLE_LC_PAPER],
"LC_NAME", &c->locale[VARIABLE_LC_NAME],
"LC_ADDRESS", &c->locale[VARIABLE_LC_ADDRESS],
"LC_TELEPHONE", &c->locale[VARIABLE_LC_TELEPHONE],
"LC_MEASUREMENT", &c->locale[VARIABLE_LC_MEASUREMENT],
"LC_IDENTIFICATION", &c->locale[VARIABLE_LC_IDENTIFICATION],
NULL);
if (r == -ENOENT) {
int p;
/* Fill in what we got passed from systemd. */
for (p = 0; p < _VARIABLE_LC_MAX; p++) {
const char *name;
name = locale_variable_to_string(p);
assert(name);
r = free_and_strdup(&c->locale[p], empty_to_null(getenv(name)));
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) {
_cleanup_fclose_ FILE *f;
char line[LINE_MAX];
bool in_section = false;
int r;
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 (IN_SET(l[0], 0, '#'))
continue;
if (in_section && first_word(l, "Option")) {
_cleanup_strv_free_ char **a = NULL;
r = strv_split_extract(&a, l, WHITESPACE, EXTRACT_QUOTES);
if (r < 0)
return r;
if (strv_length(a) == 3) {
char **p = NULL;
if (streq(a[1], "XkbLayout"))
p = &c->x11_layout;
else if (streq(a[1], "XkbModel"))
p = &c->x11_model;
else if (streq(a[1], "XkbVariant"))
p = &c->x11_variant;
else if (streq(a[1], "XkbOptions"))
p = &c->x11_options;
if (p) {
free_and_replace(*p, a[2]);
}
}
} else if (!in_section && first_word(l, "Section")) {
_cleanup_strv_free_ char **a = NULL;
r = strv_split_extract(&a, l, WHITESPACE, EXTRACT_QUOTES);
if (r < 0)
return -ENOMEM;
if (strv_length(a) == 2 && streq(a[1], "InputClass"))
in_section = true;
} else if (in_section && first_word(l, "EndSection"))
in_section = false;
}
return 0;
}
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;
}
int locale_write_data(Context *c, char ***settings) {
int r, p;
_cleanup_strv_free_ char **l = NULL;
/* Set values will be returned as strv in *settings on success. */
r = load_env_file(NULL, "/etc/locale.conf", NULL, &l);
if (r < 0 && r != -ENOENT)
return r;
for (p = 0; p < _VARIABLE_LC_MAX; p++) {
_cleanup_free_ char *t = NULL;
char **u;
const char *name;
name = locale_variable_to_string(p);
assert(name);
if (isempty(c->locale[p])) {
l = strv_env_unset(l, name);
continue;
}
if (asprintf(&t, "%s=%s", name, c->locale[p]) < 0)
return -ENOMEM;
u = strv_env_set(l, t);
if (!u)
return -ENOMEM;
strv_free(l);
l = u;
}
if (strv_isempty(l)) {
if (unlink("/etc/locale.conf") < 0)
return errno == ENOENT ? 0 : -errno;
return 0;
}
r = write_env_file_label("/etc/locale.conf", l);
if (r < 0)
return r;
*settings = TAKE_PTR(l);
return 0;
}
int vconsole_write_data(Context *c) {
int r;
_cleanup_strv_free_ char **l = NULL;
r = load_env_file(NULL, "/etc/vconsole.conf", NULL, &l);
if (r < 0 && r != -ENOENT)
return r;
if (isempty(c->vc_keymap))
l = strv_env_unset(l, "KEYMAP");
else {
_cleanup_free_ char *s = NULL;
char **u;
s = strappend("KEYMAP=", c->vc_keymap);
if (!s)
return -ENOMEM;
u = strv_env_set(l, s);
if (!u)
return -ENOMEM;
strv_free(l);
l = u;
}
if (isempty(c->vc_keymap_toggle))
l = strv_env_unset(l, "KEYMAP_TOGGLE");
else {
_cleanup_free_ char *s = NULL;
char **u;
s = strappend("KEYMAP_TOGGLE=", c->vc_keymap_toggle);
if (!s)
return -ENOMEM;
u = strv_env_set(l, s);
if (!u)
return -ENOMEM;
strv_free(l);
l = u;
}
if (strv_isempty(l)) {
if (unlink("/etc/vconsole.conf") < 0)
return errno == ENOENT ? 0 : -errno;
return 0;
}
return write_env_file_label("/etc/vconsole.conf", l);
}
int x11_write_data(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;
(void) __fsetlocking(f, FSETLOCKING_BYCALLER);
(void) fchmod(fileno(f), 0644);
fputs("# Written by systemd-localed(8), read by systemd-localed and Xorg. It's\n"
"# probably wise not to edit this file manually. Use localectl(1) to\n"
"# instruct systemd-localed to update it.\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);
r = fflush_sync_and_check(f);
if (r < 0)
goto fail;
if (rename(temp_path, "/etc/X11/xorg.conf.d/00-keyboard.conf") < 0) {
r = -errno;
goto fail;
}
return 0;
fail:
if (temp_path)
(void) unlink(temp_path);
return r;
}
static int read_next_mapping(const char* filename,
unsigned min_fields, unsigned max_fields,
FILE *f, unsigned *n, char ***a) {
assert(f);
assert(n);
assert(a);
for (;;) {
char line[LINE_MAX];
char *l, **b;
int r;
size_t length;
errno = 0;
if (!fgets(line, sizeof(line), f)) {
if (ferror(f))
return errno > 0 ? -errno : -EIO;
return 0;
}
(*n)++;
l = strstrip(line);
if (IN_SET(l[0], 0, '#'))
continue;
r = strv_split_extract(&b, l, WHITESPACE, EXTRACT_QUOTES);
if (r < 0)
return r;
length = strv_length(b);
if (length < min_fields || length > max_fields) {
log_error("Invalid line %s:%u, ignoring.", filename, *n);
strv_free(b);
continue;
}
*a = b;
return 1;
}
}
int vconsole_convert_to_x11(Context *c) {
const char *map;
int modified = -1;
map = systemd_kbd_model_map();
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(map, "re");
if (!f)
return -errno;
for (;;) {
_cleanup_strv_free_ char **a = NULL;
int r;
r = read_next_mapping(map, 5, UINT_MAX, 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_strdup(&c->x11_layout, strnulldash(a[1])) < 0 ||
free_and_strdup(&c->x11_model, strnulldash(a[2])) < 0 ||
free_and_strdup(&c->x11_variant, strnulldash(a[3])) < 0 ||
free_and_strdup(&c->x11_options, strnulldash(a[4])) < 0)
return -ENOMEM;
modified = true;
}
break;
}
}
if (modified > 0)
log_info("Changing 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));
else if (modified < 0)
log_notice("X11 keyboard layout was not modified: no conversion found for \"%s\".",
c->vc_keymap);
else
log_debug("X11 keyboard layout did not need to be modified.");
return modified > 0;
}
int find_converted_keymap(const char *x11_layout, const char *x11_variant, char **new_keymap) {
const char *dir;
_cleanup_free_ char *n;
if (x11_variant)
n = strjoin(x11_layout, "-", x11_variant);
else
n = strdup(x11_layout);
if (!n)
return -ENOMEM;
NULSTR_FOREACH(dir, KBD_KEYMAP_DIRS) {
_cleanup_free_ char *p = NULL, *pz = NULL;
bool uncompressed;
p = strjoin(dir, "xkb/", n, ".map");
pz = strjoin(dir, "xkb/", n, ".map.gz");
if (!p || !pz)
return -ENOMEM;
uncompressed = access(p, F_OK) == 0;
if (uncompressed || access(pz, F_OK) == 0) {
log_debug("Found converted keymap %s at %s",
n, uncompressed ? p : pz);
*new_keymap = TAKE_PTR(n);
return 1;
}
}
return 0;
}
int find_legacy_keymap(Context *c, char **new_keymap) {
const char *map;
_cleanup_fclose_ FILE *f = NULL;
unsigned n = 0;
unsigned best_matching = 0;
int r;
assert(!isempty(c->x11_layout));
map = systemd_kbd_model_map();
f = fopen(map, "re");
if (!f)
return -errno;
for (;;) {
_cleanup_strv_free_ char **a = NULL;
unsigned matching = 0;
r = read_next_mapping(map, 5, UINT_MAX, f, &n, &a);
if (r < 0)
return r;
if (r == 0)
break;
/* Determine how well matching this entry is */
if (streq(c->x11_layout, a[1]))
/* If we got an exact match, this is best */
matching = 10;
else {
/* We have multiple X layouts, look for an
* entry that matches our key with everything
* but the first layout stripped off. */
if (startswith_comma(c->x11_layout, a[1]))
matching = 5;
else {
char *x;
/* If that didn't work, strip off the
* other layouts from the entry, too */
x = strndupa(a[1], strcspn(a[1], ","));
if (startswith_comma(c->x11_layout, x))
matching = 1;
}
}
if (matching > 0) {
if (isempty(c->x11_model) || 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 >= MAX(best_matching, 1u)) {
log_debug("Found legacy keymap %s with score %u",
a[0], matching);
if (matching > best_matching) {
best_matching = matching;
r = free_and_strdup(new_keymap, a[0]);
if (r < 0)
return r;
}
}
}
if (best_matching < 10 && c->x11_layout) {
/* The best match is only the first part of the X11
* keymap. Check if we have a converted map which
* matches just the first layout.
*/
char *l, *v = NULL, *converted;
l = strndupa(c->x11_layout, strcspn(c->x11_layout, ","));
if (c->x11_variant)
v = strndupa(c->x11_variant, strcspn(c->x11_variant, ","));
r = find_converted_keymap(l, v, &converted);
if (r < 0)
return r;
if (r > 0) {
free(*new_keymap);
*new_keymap = converted;
}
}
return (bool) *new_keymap;
}
int find_language_fallback(const char *lang, char **language) {
const char *map;
_cleanup_fclose_ FILE *f = NULL;
unsigned n = 0;
assert(lang);
assert(language);
map = systemd_language_fallback_map();
f = fopen(map, "re");
if (!f)
return -errno;
for (;;) {
_cleanup_strv_free_ char **a = NULL;
int r;
r = read_next_mapping(map, 2, 2, f, &n, &a);
if (r <= 0)
return r;
if (streq(lang, a[0])) {
assert(strv_length(a) == 2);
*language = a[1];
a[1] = NULL;
return 1;
}
}
assert_not_reached("should not be here");
}
int x11_convert_to_vconsole(Context *c) {
bool modified = false;
if (isempty(c->x11_layout)) {
modified =
!isempty(c->vc_keymap) ||
!isempty(c->vc_keymap_toggle);
context_free_vconsole(c);
} else {
char *new_keymap = NULL;
int r;
r = find_converted_keymap(c->x11_layout, c->x11_variant, &new_keymap);
if (r < 0)
return r;
else if (r == 0) {
r = find_legacy_keymap(c, &new_keymap);
if (r < 0)
return r;
}
if (r == 0)
/* We search for layout-variant match first, but then we also look
* for anything which matches just the layout. So it's accurate to say
* that we couldn't find anything which matches the layout. */
log_notice("No conversion to virtual console map found for \"%s\".",
c->x11_layout);
if (!streq_ptr(c->vc_keymap, new_keymap)) {
free(c->vc_keymap);
c->vc_keymap = new_keymap;
c->vc_keymap_toggle = mfree(c->vc_keymap_toggle);
modified = true;
} else
free(new_keymap);
}
if (modified)
log_info("Changing virtual console keymap to '%s' toggle '%s'",
strempty(c->vc_keymap), strempty(c->vc_keymap_toggle));
else
log_debug("Virtual console keymap was not modified.");
return modified;
}
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