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/* Handle aliases for locale names.
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Copyright (C) 1995-2018 Free Software Foundation, Inc.
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6c4009 |
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This program is free software: you can redistribute it and/or modify
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6c4009 |
it under the terms of the GNU Lesser General Public License as published by
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6c4009 |
the Free Software Foundation; either version 2.1 of the License, or
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6c4009 |
(at your option) any later version.
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6c4009 |
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This program is distributed in the hope that it will be useful,
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6c4009 |
but WITHOUT ANY WARRANTY; without even the implied warranty of
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6c4009 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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6c4009 |
GNU Lesser General Public License for more details.
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6c4009 |
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6c4009 |
You should have received a copy of the GNU Lesser General Public License
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6c4009 |
along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* Tell glibc's <string.h> to provide a prototype for mempcpy().
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This must come before <config.h> because <config.h> may include
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<features.h>, and once <features.h> has been included, it's too late. */
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#ifndef _GNU_SOURCE
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# define _GNU_SOURCE 1
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#endif
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <ctype.h>
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#include <stdio.h>
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#if defined _LIBC || defined HAVE___FSETLOCKING
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# include <stdio_ext.h>
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#endif
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#include <sys/types.h>
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#ifdef __GNUC__
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# undef alloca
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# define alloca __builtin_alloca
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# define HAVE_ALLOCA 1
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#else
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# ifdef _MSC_VER
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# include <malloc.h>
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# define alloca _alloca
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# else
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# if defined HAVE_ALLOCA_H || defined _LIBC
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# include <alloca.h>
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# else
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# ifdef _AIX
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#pragma alloca
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# else
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# ifndef alloca
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char *alloca ();
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# endif
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# endif
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# endif
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# endif
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#endif
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#include <stdlib.h>
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#include <string.h>
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#include "gettextP.h"
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#ifdef ENABLE_RELOCATABLE
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# include "relocatable.h"
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#else
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# define relocate(pathname) (pathname)
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#endif
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|
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/* @@ end of prolog @@ */
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#ifdef _LIBC
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/* Rename the non ANSI C functions. This is required by the standard
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because some ANSI C functions will require linking with this object
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file and the name space must not be polluted. */
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# define strcasecmp(s1, s2) __strcasecmp_l (s1, s2, _nl_C_locobj_ptr)
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# ifndef mempcpy
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# define mempcpy __mempcpy
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# endif
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# define HAVE_MEMPCPY 1
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# define HAVE___FSETLOCKING 1
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#endif
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/* Handle multi-threaded applications. */
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#ifdef _LIBC
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# include <libc-lock.h>
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#else
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# include "lock.h"
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#endif
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/* Some optimizations for glibc. */
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#ifdef _LIBC
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# define FEOF(fp) __feof_unlocked (fp)
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# define FGETS(buf, n, fp) __fgets_unlocked (buf, n, fp)
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#else
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# define FEOF(fp) feof (fp)
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# define FGETS(buf, n, fp) fgets (buf, n, fp)
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6c4009 |
#endif
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/* For those losing systems which don't have `alloca' we have to add
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some additional code emulating it. */
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6c4009 |
#ifdef HAVE_ALLOCA
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# define freea(p) /* nothing */
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#else
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# define alloca(n) malloc (n)
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# define freea(p) free (p)
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6c4009 |
#endif
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6c4009 |
|
|
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6c4009 |
#if defined _LIBC_REENTRANT || defined HAVE_DECL_FGETS_UNLOCKED
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6c4009 |
# undef fgets
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|
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6c4009 |
# define fgets(buf, len, s) fgets_unlocked (buf, len, s)
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6c4009 |
#endif
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6c4009 |
#if defined _LIBC_REENTRANT || defined HAVE_DECL_FEOF_UNLOCKED
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6c4009 |
# undef feof
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|
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6c4009 |
# define feof(s) feof_unlocked (s)
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6c4009 |
#endif
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6c4009 |
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6c4009 |
|
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6c4009 |
__libc_lock_define_initialized (static, lock)
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6c4009 |
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6c4009 |
|
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6c4009 |
struct alias_map
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|
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{
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|
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6c4009 |
const char *alias;
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6c4009 |
const char *value;
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|
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6c4009 |
};
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6c4009 |
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6c4009 |
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6c4009 |
#ifndef _LIBC
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|
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6c4009 |
# define libc_freeres_ptr(decl) decl
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6c4009 |
#endif
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6c4009 |
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6c4009 |
libc_freeres_ptr (static char *string_space);
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6c4009 |
static size_t string_space_act;
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6c4009 |
static size_t string_space_max;
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6c4009 |
libc_freeres_ptr (static struct alias_map *map);
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6c4009 |
static size_t nmap;
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6c4009 |
static size_t maxmap;
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6c4009 |
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6c4009 |
|
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6c4009 |
/* Prototypes for local functions. */
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6c4009 |
static size_t read_alias_file (const char *fname, int fname_len);
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6c4009 |
static int extend_alias_table (void);
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6c4009 |
static int alias_compare (const struct alias_map *map1,
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6c4009 |
const struct alias_map *map2);
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6c4009 |
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6c4009 |
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const char *
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6c4009 |
_nl_expand_alias (const char *name)
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{
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6c4009 |
static const char *locale_alias_path;
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6c4009 |
struct alias_map *retval;
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6c4009 |
const char *result = NULL;
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6c4009 |
size_t added;
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6c4009 |
|
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6c4009 |
__libc_lock_lock (lock);
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6c4009 |
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6c4009 |
if (locale_alias_path == NULL)
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6c4009 |
locale_alias_path = LOCALE_ALIAS_PATH;
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6c4009 |
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do
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{
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6c4009 |
struct alias_map item;
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6c4009 |
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6c4009 |
item.alias = name;
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6c4009 |
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6c4009 |
if (nmap > 0)
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retval = (struct alias_map *) bsearch (&item, map, nmap,
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6c4009 |
sizeof (struct alias_map),
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6c4009 |
(int (*) (const void *,
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|
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6c4009 |
const void *)
|
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6c4009 |
) alias_compare);
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6c4009 |
else
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6c4009 |
retval = NULL;
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6c4009 |
|
|
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6c4009 |
/* We really found an alias. Return the value. */
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|
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6c4009 |
if (retval != NULL)
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|
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6c4009 |
{
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|
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6c4009 |
result = retval->value;
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6c4009 |
break;
|
|
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6c4009 |
}
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|
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6c4009 |
|
|
Packit |
6c4009 |
/* Perhaps we can find another alias file. */
|
|
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6c4009 |
added = 0;
|
|
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6c4009 |
while (added == 0 && locale_alias_path[0] != '\0')
|
|
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6c4009 |
{
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|
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6c4009 |
const char *start;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
while (locale_alias_path[0] == PATH_SEPARATOR)
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Packit |
6c4009 |
++locale_alias_path;
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|
Packit |
6c4009 |
start = locale_alias_path;
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|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
while (locale_alias_path[0] != '\0'
|
|
Packit |
6c4009 |
&& locale_alias_path[0] != PATH_SEPARATOR)
|
|
Packit |
6c4009 |
++locale_alias_path;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
if (start < locale_alias_path)
|
|
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6c4009 |
added = read_alias_file (start, locale_alias_path - start);
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
while (added != 0);
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
__libc_lock_unlock (lock);
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
return result;
|
|
Packit |
6c4009 |
}
|
|
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6c4009 |
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
static size_t
|
|
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6c4009 |
read_alias_file (const char *fname, int fname_len)
|
|
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6c4009 |
{
|
|
Packit |
6c4009 |
FILE *fp;
|
|
Packit |
6c4009 |
char *full_fname;
|
|
Packit |
6c4009 |
size_t added;
|
|
Packit |
6c4009 |
static const char aliasfile[] = "/locale.alias";
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
full_fname = (char *) alloca (fname_len + sizeof aliasfile);
|
|
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6c4009 |
#ifdef HAVE_MEMPCPY
|
|
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6c4009 |
mempcpy (mempcpy (full_fname, fname, fname_len),
|
|
Packit |
6c4009 |
aliasfile, sizeof aliasfile);
|
|
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6c4009 |
#else
|
|
Packit |
6c4009 |
memcpy (full_fname, fname, fname_len);
|
|
Packit |
6c4009 |
memcpy (&full_fname[fname_len], aliasfile, sizeof aliasfile);
|
|
Packit |
6c4009 |
#endif
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
#ifdef _LIBC
|
|
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6c4009 |
/* Note the file is opened with cancellation in the I/O functions
|
|
Packit |
6c4009 |
disabled. */
|
|
Packit |
6c4009 |
fp = fopen (relocate (full_fname), "rce");
|
|
Packit |
6c4009 |
#else
|
|
Packit |
6c4009 |
fp = fopen (relocate (full_fname), "r");
|
|
Packit |
6c4009 |
#endif
|
|
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6c4009 |
freea (full_fname);
|
|
Packit |
6c4009 |
if (fp == NULL)
|
|
Packit |
6c4009 |
return 0;
|
|
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6c4009 |
|
|
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6c4009 |
#ifdef HAVE___FSETLOCKING
|
|
Packit |
6c4009 |
/* No threads present. */
|
|
Packit |
6c4009 |
__fsetlocking (fp, FSETLOCKING_BYCALLER);
|
|
Packit |
6c4009 |
#endif
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
added = 0;
|
|
Packit |
6c4009 |
while (!FEOF (fp))
|
|
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6c4009 |
{
|
|
Packit |
6c4009 |
/* It is a reasonable approach to use a fix buffer here because
|
|
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6c4009 |
a) we are only interested in the first two fields
|
|
Packit |
6c4009 |
b) these fields must be usable as file names and so must not
|
|
Packit |
6c4009 |
be that long
|
|
Packit |
6c4009 |
We avoid a multi-kilobyte buffer here since this would use up
|
|
Packit |
6c4009 |
stack space which we might not have if the program ran out of
|
|
Packit |
6c4009 |
memory. */
|
|
Packit |
6c4009 |
char buf[400];
|
|
Packit |
6c4009 |
char *alias;
|
|
Packit |
6c4009 |
char *value;
|
|
Packit |
6c4009 |
char *cp;
|
|
Packit |
6c4009 |
int complete_line;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
if (FGETS (buf, sizeof buf, fp) == NULL)
|
|
Packit |
6c4009 |
/* EOF reached. */
|
|
Packit |
6c4009 |
break;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
/* Determine whether the line is complete. */
|
|
Packit |
6c4009 |
complete_line = strchr (buf, '\n') != NULL;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
cp = buf;
|
|
Packit |
6c4009 |
/* Ignore leading white space. */
|
|
Packit |
6c4009 |
while (isspace ((unsigned char) cp[0]))
|
|
Packit |
6c4009 |
++cp;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
/* A leading '#' signals a comment line. */
|
|
Packit |
6c4009 |
if (cp[0] != '\0' && cp[0] != '#')
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
alias = cp++;
|
|
Packit |
6c4009 |
while (cp[0] != '\0' && !isspace ((unsigned char) cp[0]))
|
|
Packit |
6c4009 |
++cp;
|
|
Packit |
6c4009 |
/* Terminate alias name. */
|
|
Packit |
6c4009 |
if (cp[0] != '\0')
|
|
Packit |
6c4009 |
*cp++ = '\0';
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
/* Now look for the beginning of the value. */
|
|
Packit |
6c4009 |
while (isspace ((unsigned char) cp[0]))
|
|
Packit |
6c4009 |
++cp;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
if (cp[0] != '\0')
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
value = cp++;
|
|
Packit |
6c4009 |
while (cp[0] != '\0' && !isspace ((unsigned char) cp[0]))
|
|
Packit |
6c4009 |
++cp;
|
|
Packit |
6c4009 |
/* Terminate value. */
|
|
Packit |
6c4009 |
if (cp[0] == '\n')
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
/* This has to be done to make the following test
|
|
Packit |
6c4009 |
for the end of line possible. We are looking for
|
|
Packit |
6c4009 |
the terminating '\n' which do not overwrite here. */
|
|
Packit |
6c4009 |
*cp++ = '\0';
|
|
Packit |
6c4009 |
*cp = '\n';
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
else if (cp[0] != '\0')
|
|
Packit |
6c4009 |
*cp++ = '\0';
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
#ifdef IN_LIBGLOCALE
|
|
Packit |
6c4009 |
/* glibc's locale.alias contains entries for ja_JP and ko_KR
|
|
Packit |
6c4009 |
that make it impossible to use a Japanese or Korean UTF-8
|
|
Packit |
6c4009 |
locale under the name "ja_JP" or "ko_KR". Ignore these
|
|
Packit |
6c4009 |
entries. */
|
|
Packit |
6c4009 |
if (strchr (alias, '_') == NULL)
|
|
Packit |
6c4009 |
#endif
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
size_t alias_len;
|
|
Packit |
6c4009 |
size_t value_len;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
if (nmap >= maxmap)
|
|
Packit |
6c4009 |
if (__builtin_expect (extend_alias_table (), 0))
|
|
Packit |
6c4009 |
goto out;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
alias_len = strlen (alias) + 1;
|
|
Packit |
6c4009 |
value_len = strlen (value) + 1;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
if (string_space_act + alias_len + value_len > string_space_max)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
/* Increase size of memory pool. */
|
|
Packit |
6c4009 |
size_t new_size = (string_space_max
|
|
Packit |
6c4009 |
+ (alias_len + value_len > 1024
|
|
Packit |
6c4009 |
? alias_len + value_len : 1024));
|
|
Packit |
6c4009 |
char *new_pool = (char *) realloc (string_space, new_size);
|
|
Packit |
6c4009 |
if (new_pool == NULL)
|
|
Packit |
6c4009 |
goto out;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
if (__builtin_expect (string_space != new_pool, 0))
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
size_t i;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
for (i = 0; i < nmap; i++)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
map[i].alias += new_pool - string_space;
|
|
Packit |
6c4009 |
map[i].value += new_pool - string_space;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
string_space = new_pool;
|
|
Packit |
6c4009 |
string_space_max = new_size;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
map[nmap].alias =
|
|
Packit |
6c4009 |
(const char *) memcpy (&string_space[string_space_act],
|
|
Packit |
6c4009 |
alias, alias_len);
|
|
Packit |
6c4009 |
string_space_act += alias_len;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
map[nmap].value =
|
|
Packit |
6c4009 |
(const char *) memcpy (&string_space[string_space_act],
|
|
Packit |
6c4009 |
value, value_len);
|
|
Packit |
6c4009 |
string_space_act += value_len;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
++nmap;
|
|
Packit |
6c4009 |
++added;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
/* Possibly not the whole line fits into the buffer. Ignore
|
|
Packit |
6c4009 |
the rest of the line. */
|
|
Packit |
6c4009 |
if (! complete_line)
|
|
Packit |
6c4009 |
do
|
|
Packit |
6c4009 |
if (FGETS (buf, sizeof buf, fp) == NULL)
|
|
Packit |
6c4009 |
/* Make sure the inner loop will be left. The outer loop
|
|
Packit |
6c4009 |
will exit at the `feof' test. */
|
|
Packit |
6c4009 |
break;
|
|
Packit |
6c4009 |
while (strchr (buf, '\n') == NULL);
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
out:
|
|
Packit |
6c4009 |
/* Should we test for ferror()? I think we have to silently ignore
|
|
Packit |
6c4009 |
errors. --drepper */
|
|
Packit |
6c4009 |
fclose (fp);
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
if (added > 0)
|
|
Packit |
6c4009 |
qsort (map, nmap, sizeof (struct alias_map),
|
|
Packit |
6c4009 |
(int (*) (const void *, const void *)) alias_compare);
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
return added;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
static int
|
|
Packit |
6c4009 |
extend_alias_table (void)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
size_t new_size;
|
|
Packit |
6c4009 |
struct alias_map *new_map;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
new_size = maxmap == 0 ? 100 : 2 * maxmap;
|
|
Packit |
6c4009 |
new_map = (struct alias_map *) realloc (map, (new_size
|
|
Packit |
6c4009 |
* sizeof (struct alias_map)));
|
|
Packit |
6c4009 |
if (new_map == NULL)
|
|
Packit |
6c4009 |
/* Simply don't extend: we don't have any more core. */
|
|
Packit |
6c4009 |
return -1;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
map = new_map;
|
|
Packit |
6c4009 |
maxmap = new_size;
|
|
Packit |
6c4009 |
return 0;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
static int
|
|
Packit |
6c4009 |
alias_compare (const struct alias_map *map1, const struct alias_map *map2)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
#if defined _LIBC || defined HAVE_STRCASECMP
|
|
Packit |
6c4009 |
return strcasecmp (map1->alias, map2->alias);
|
|
Packit |
6c4009 |
#else
|
|
Packit |
6c4009 |
const unsigned char *p1 = (const unsigned char *) map1->alias;
|
|
Packit |
6c4009 |
const unsigned char *p2 = (const unsigned char *) map2->alias;
|
|
Packit |
6c4009 |
unsigned char c1, c2;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
if (p1 == p2)
|
|
Packit |
6c4009 |
return 0;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
do
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
/* I know this seems to be odd but the tolower() function in
|
|
Packit |
6c4009 |
some systems libc cannot handle nonalpha characters. */
|
|
Packit |
6c4009 |
c1 = isupper (*p1) ? tolower (*p1) : *p1;
|
|
Packit |
6c4009 |
c2 = isupper (*p2) ? tolower (*p2) : *p2;
|
|
Packit |
6c4009 |
if (c1 == '\0')
|
|
Packit |
6c4009 |
break;
|
|
Packit |
6c4009 |
++p1;
|
|
Packit |
6c4009 |
++p2;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
while (c1 == c2);
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
return c1 - c2;
|
|
Packit |
6c4009 |
#endif
|
|
Packit |
6c4009 |
}
|