/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** 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 <sys/mman.h> #include "set.h" #include "util.h" #include "utf8.h" #include "strv.h" #include "locale-util.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; 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; } 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);