228 lines
6.4 KiB
C
228 lines
6.4 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2014 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <sys/mman.h>
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#include "dirent-util.h"
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#include "fd-util.h"
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#include "locale-util.h"
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#include "path-util.h"
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#include "set.h"
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#include "string-util.h"
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#include "strv.h"
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#include "utf8.h"
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#include "util.h"
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static int add_locales_from_archive(Set *locales) {
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/* Stolen from glibc... */
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struct locarhead {
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uint32_t magic;
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/* Serial number. */
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uint32_t serial;
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/* Name hash table. */
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uint32_t namehash_offset;
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uint32_t namehash_used;
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uint32_t namehash_size;
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/* String table. */
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uint32_t string_offset;
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uint32_t string_used;
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uint32_t string_size;
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/* Table with locale records. */
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uint32_t locrectab_offset;
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uint32_t locrectab_used;
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uint32_t locrectab_size;
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/* MD5 sum hash table. */
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uint32_t sumhash_offset;
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uint32_t sumhash_used;
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uint32_t sumhash_size;
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};
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struct namehashent {
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/* Hash value of the name. */
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uint32_t hashval;
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/* Offset of the name in the string table. */
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uint32_t name_offset;
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/* Offset of the locale record. */
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uint32_t locrec_offset;
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};
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const struct locarhead *h;
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const struct namehashent *e;
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const void *p = MAP_FAILED;
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_cleanup_close_ int fd = -1;
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size_t sz = 0;
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struct stat st;
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unsigned i;
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int r;
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fd = open("/usr/lib/locale/locale-archive", O_RDONLY|O_NOCTTY|O_CLOEXEC);
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if (fd < 0)
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return errno == ENOENT ? 0 : -errno;
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if (fstat(fd, &st) < 0)
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return -errno;
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if (!S_ISREG(st.st_mode))
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return -EBADMSG;
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if (st.st_size < (off_t) sizeof(struct locarhead))
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return -EBADMSG;
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p = mmap(NULL, st.st_size, PROT_READ, MAP_SHARED, fd, 0);
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if (p == MAP_FAILED)
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return -errno;
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h = (const struct locarhead *) p;
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if (h->magic != 0xde020109 ||
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h->namehash_offset + h->namehash_size > st.st_size ||
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h->string_offset + h->string_size > st.st_size ||
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h->locrectab_offset + h->locrectab_size > st.st_size ||
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h->sumhash_offset + h->sumhash_size > st.st_size) {
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r = -EBADMSG;
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goto finish;
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}
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e = (const struct namehashent*) ((const uint8_t*) p + h->namehash_offset);
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for (i = 0; i < h->namehash_size; i++) {
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char *z;
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if (e[i].locrec_offset == 0)
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continue;
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if (!utf8_is_valid((char*) p + e[i].name_offset))
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continue;
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z = strdup((char*) p + e[i].name_offset);
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if (!z) {
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r = -ENOMEM;
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goto finish;
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}
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r = set_consume(locales, z);
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if (r < 0)
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goto finish;
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}
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r = 0;
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finish:
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if (p != MAP_FAILED)
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munmap((void*) p, sz);
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return r;
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}
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static int add_locales_from_libdir (Set *locales) {
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_cleanup_closedir_ DIR *dir = NULL;
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struct dirent *entry;
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int r;
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dir = opendir("/usr/lib/locale");
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if (!dir)
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return errno == ENOENT ? 0 : -errno;
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FOREACH_DIRENT(entry, dir, return -errno) {
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char *z;
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if (entry->d_type != DT_DIR)
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continue;
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z = strdup(entry->d_name);
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if (!z)
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return -ENOMEM;
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r = set_consume(locales, z);
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if (r < 0 && r != -EEXIST)
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return r;
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}
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return 0;
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}
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int get_locales(char ***ret) {
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_cleanup_set_free_ Set *locales = NULL;
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_cleanup_strv_free_ char **l = NULL;
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int r;
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locales = set_new(&string_hash_ops);
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if (!locales)
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return -ENOMEM;
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r = add_locales_from_archive(locales);
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if (r < 0 && r != -ENOENT)
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return r;
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r = add_locales_from_libdir(locales);
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if (r < 0)
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return r;
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l = set_get_strv(locales);
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if (!l)
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return -ENOMEM;
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strv_sort(l);
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*ret = l;
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l = NULL;
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return 0;
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}
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bool locale_is_valid(const char *name) {
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if (isempty(name))
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return false;
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if (strlen(name) >= 128)
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return false;
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if (!utf8_is_valid(name))
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return false;
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if (!filename_is_valid(name))
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return false;
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if (!string_is_safe(name))
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return false;
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return true;
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}
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static const char * const locale_variable_table[_VARIABLE_LC_MAX] = {
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[VARIABLE_LANG] = "LANG",
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[VARIABLE_LANGUAGE] = "LANGUAGE",
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[VARIABLE_LC_CTYPE] = "LC_CTYPE",
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[VARIABLE_LC_NUMERIC] = "LC_NUMERIC",
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[VARIABLE_LC_TIME] = "LC_TIME",
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[VARIABLE_LC_COLLATE] = "LC_COLLATE",
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[VARIABLE_LC_MONETARY] = "LC_MONETARY",
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[VARIABLE_LC_MESSAGES] = "LC_MESSAGES",
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[VARIABLE_LC_PAPER] = "LC_PAPER",
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[VARIABLE_LC_NAME] = "LC_NAME",
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[VARIABLE_LC_ADDRESS] = "LC_ADDRESS",
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[VARIABLE_LC_TELEPHONE] = "LC_TELEPHONE",
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[VARIABLE_LC_MEASUREMENT] = "LC_MEASUREMENT",
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[VARIABLE_LC_IDENTIFICATION] = "LC_IDENTIFICATION"
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};
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DEFINE_STRING_TABLE_LOOKUP(locale_variable, LocaleVariable);
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