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/* SPDX-License-Identifier: LGPL-2.1+ */
/***
This file is part of systemd.
Copyright 2014 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 <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <ftw.h>
#include <langinfo.h>
#include <libintl.h>
#include <locale.h>
#include <stddef.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include "def.h"
#include "dirent-util.h"
#include "fd-util.h"
#include "hashmap.h"
#include "locale-util.h"
#include "path-util.h"
#include "set.h"
#include "string-table.h"
#include "string-util.h"
#include "strv.h"
#include "utf8.h"
static int add_locales_from_archive(Set *locales) {
/* Stolen from glibc... */
struct locarhead {
uint32_t magic;
/* Serial number. */
uint32_t serial;
/* Name hash table. */
uint32_t namehash_offset;
uint32_t namehash_used;
uint32_t namehash_size;
/* String table. */
uint32_t string_offset;
uint32_t string_used;
uint32_t string_size;
/* Table with locale records. */
uint32_t locrectab_offset;
uint32_t locrectab_used;
uint32_t locrectab_size;
/* MD5 sum hash table. */
uint32_t sumhash_offset;
uint32_t sumhash_used;
uint32_t sumhash_size;
};
struct namehashent {
/* Hash value of the name. */
uint32_t hashval;
/* Offset of the name in the string table. */
uint32_t name_offset;
/* Offset of the locale record. */
uint32_t locrec_offset;
};
const struct locarhead *h;
const struct namehashent *e;
const void *p = MAP_FAILED;
_cleanup_close_ int fd = -1;
size_t sz = 0;
struct stat st;
unsigned i;
int r;
fd = open("/usr/lib/locale/locale-archive", O_RDONLY|O_NOCTTY|O_CLOEXEC);
if (fd < 0)
return errno == ENOENT ? 0 : -errno;
if (fstat(fd, &st) < 0)
return -errno;
if (!S_ISREG(st.st_mode))
return -EBADMSG;
if (st.st_size < (off_t) sizeof(struct locarhead))
return -EBADMSG;
p = mmap(NULL, st.st_size, PROT_READ, MAP_SHARED, fd, 0);
if (p == MAP_FAILED)
return -errno;
h = (const struct locarhead *) p;
if (h->magic != 0xde020109 ||
h->namehash_offset + h->namehash_size > st.st_size ||
h->string_offset + h->string_size > st.st_size ||
h->locrectab_offset + h->locrectab_size > st.st_size ||
h->sumhash_offset + h->sumhash_size > st.st_size) {
r = -EBADMSG;
goto finish;
}
e = (const struct namehashent*) ((const uint8_t*) p + h->namehash_offset);
for (i = 0; i < h->namehash_size; i++) {
char *z;
if (e[i].locrec_offset == 0)
continue;
if (!utf8_is_valid((char*) p + e[i].name_offset))
continue;
z = strdup((char*) p + e[i].name_offset);
if (!z) {
r = -ENOMEM;
goto finish;
}
r = set_consume(locales, z);
if (r < 0)
goto finish;
}
r = 0;
finish:
if (p != MAP_FAILED)
munmap((void*) p, sz);
return r;
}
static int add_locales_from_libdir (Set *locales) {
_cleanup_closedir_ DIR *dir = NULL;
struct dirent *entry;
int r;
dir = opendir("/usr/lib/locale");
if (!dir)
return errno == ENOENT ? 0 : -errno;
FOREACH_DIRENT(entry, dir, return -errno) {
char *z;
dirent_ensure_type(dir, entry);
if (entry->d_type != DT_DIR)
continue;
z = strdup(entry->d_name);
if (!z)
return -ENOMEM;
r = set_consume(locales, z);
if (r < 0 && r != -EEXIST)
return r;
}
return 0;
}
int get_locales(char ***ret) {
_cleanup_set_free_ Set *locales = NULL;
_cleanup_strv_free_ char **l = NULL;
int r;
locales = set_new(&string_hash_ops);
if (!locales)
return -ENOMEM;
r = add_locales_from_archive(locales);
if (r < 0 && r != -ENOENT)
return r;
r = add_locales_from_libdir(locales);
if (r < 0)
return r;
l = set_get_strv(locales);
if (!l)
return -ENOMEM;
strv_sort(l);
*ret = l;
l = NULL;
return 0;
}
bool locale_is_valid(const char *name) {
if (isempty(name))
return false;
if (strlen(name) >= 128)
return false;
if (!utf8_is_valid(name))
return false;
if (!filename_is_valid(name))
return false;
if (!string_is_safe(name))
return false;
return true;
}
void init_gettext(void) {
setlocale(LC_ALL, "");
textdomain(GETTEXT_PACKAGE);
}
bool is_locale_utf8(void) {
const char *set;
static int cached_answer = -1;
/* Note that we default to 'true' here, since today UTF8 is
* pretty much supported everywhere. */
if (cached_answer >= 0)
goto out;
if (!setlocale(LC_ALL, "")) {
cached_answer = true;
goto out;
}
set = nl_langinfo(CODESET);
if (!set) {
cached_answer = true;
goto out;
}
if (streq(set, "UTF-8")) {
cached_answer = true;
goto out;
}
/* For LC_CTYPE=="C" return true, because CTYPE is effectly
* unset and everything can do to UTF-8 nowadays. */
set = setlocale(LC_CTYPE, NULL);
if (!set) {
cached_answer = true;
goto out;
}
/* Check result, but ignore the result if C was set
* explicitly. */
cached_answer =
STR_IN_SET(set, "C", "POSIX") &&
!getenv("LC_ALL") &&
!getenv("LC_CTYPE") &&
!getenv("LANG");
out:
return (bool) cached_answer;
}
static thread_local Set *keymaps = NULL;
static int nftw_cb(
const char *fpath,
const struct stat *sb,
int tflag,
struct FTW *ftwbuf) {
char *p, *e;
int r;
if (tflag != FTW_F)
return 0;
if (!endswith(fpath, ".map") &&
!endswith(fpath, ".map.gz"))
return 0;
p = strdup(basename(fpath));
if (!p)
return FTW_STOP;
e = endswith(p, ".map");
if (e)
*e = 0;
e = endswith(p, ".map.gz");
if (e)
*e = 0;
r = set_consume(keymaps, p);
if (r < 0 && r != -EEXIST)
return r;
return 0;
}
int get_keymaps(char ***ret) {
_cleanup_strv_free_ char **l = NULL;
const char *dir;
int r;
keymaps = set_new(&string_hash_ops);
if (!keymaps)
return -ENOMEM;
NULSTR_FOREACH(dir, KBD_KEYMAP_DIRS) {
r = nftw(dir, nftw_cb, 20, FTW_MOUNT|FTW_PHYS|FTW_ACTIONRETVAL);
if (r == FTW_STOP)
log_debug("Directory not found %s", dir);
else if (r < 0)
log_debug_errno(r, "Can't add keymap: %m");
}
l = set_get_strv(keymaps);
if (!l) {
set_free_free(keymaps);
return -ENOMEM;
}
set_free(keymaps);
if (strv_isempty(l))
return -ENOENT;
strv_sort(l);
*ret = l;
l = NULL;
return 0;
}
bool keymap_is_valid(const char *name) {
if (isempty(name))
return false;
if (strlen(name) >= 128)
return false;
if (!utf8_is_valid(name))
return false;
if (!filename_is_valid(name))
return false;
if (!string_is_safe(name))
return false;
return true;
}
const char *special_glyph(SpecialGlyph code) {
static const char* const draw_table[2][_SPECIAL_GLYPH_MAX] = {
/* ASCII fallback */
[false] = {
[TREE_VERTICAL] = "| ",
[TREE_BRANCH] = "|-",
[TREE_RIGHT] = "`-",
[TREE_SPACE] = " ",
[TRIANGULAR_BULLET] = ">",
[BLACK_CIRCLE] = "*",
[ARROW] = "->",
[MDASH] = "-",
},
/* UTF-8 */
[ true ] = {
[TREE_VERTICAL] = "\342\224\202 ", /* │ */
[TREE_BRANCH] = "\342\224\234\342\224\200", /* ├─ */
[TREE_RIGHT] = "\342\224\224\342\224\200", /* └─ */
[TREE_SPACE] = " ", /* */
[TRIANGULAR_BULLET] = "\342\200\243", /* ‣ */
[BLACK_CIRCLE] = "\342\227\217", /* ● */
[ARROW] = "\342\206\222", /* → */
[MDASH] = "\342\200\223", /* – */
},
};
return draw_table[is_locale_utf8()][code];
}
static const char * const locale_variable_table[_VARIABLE_LC_MAX] = {
[VARIABLE_LANG] = "LANG",
[VARIABLE_LANGUAGE] = "LANGUAGE",
[VARIABLE_LC_CTYPE] = "LC_CTYPE",
[VARIABLE_LC_NUMERIC] = "LC_NUMERIC",
[VARIABLE_LC_TIME] = "LC_TIME",
[VARIABLE_LC_COLLATE] = "LC_COLLATE",
[VARIABLE_LC_MONETARY] = "LC_MONETARY",
[VARIABLE_LC_MESSAGES] = "LC_MESSAGES",
[VARIABLE_LC_PAPER] = "LC_PAPER",
[VARIABLE_LC_NAME] = "LC_NAME",
[VARIABLE_LC_ADDRESS] = "LC_ADDRESS",
[VARIABLE_LC_TELEPHONE] = "LC_TELEPHONE",
[VARIABLE_LC_MEASUREMENT] = "LC_MEASUREMENT",
[VARIABLE_LC_IDENTIFICATION] = "LC_IDENTIFICATION"
};
DEFINE_STRING_TABLE_LOOKUP(locale_variable, LocaleVariable);
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