[apple/libc.git] / locale / FreeBSD / setlocale.c

/*
 * Copyright (c) 1996 - 2002 FreeBSD Project
 * Copyright (c) 1991, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Paul Borman at Krystal Technologies.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)setlocale.c	8.1 (Berkeley) 7/4/93";
#endif /* LIBC_SCCS and not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/lib/libc/locale/setlocale.c,v 1.50 2004/01/31 19:15:32 ache Exp $");

#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <limits.h>
#include <locale.h>
#include <paths.h>	/* for _PATH_LOCALE */
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "collate.h"
#include "lmonetary.h"	/* for __monetary_load_locale() */
#include "lnumeric.h"	/* for __numeric_load_locale() */
#include "lmessages.h"	/* for __messages_load_locale() */
#include "setlocale.h"
#include "ldpart.h"
#include "../stdtime/timelocal.h" /* for __time_load_locale() */

/*
 * Category names for getenv()
 */
static char *categories[_LC_LAST] = {
    "LC_ALL",
    "LC_COLLATE",
    "LC_CTYPE",
    "LC_MONETARY",
    "LC_NUMERIC",
    "LC_TIME",
    "LC_MESSAGES",
};

/*
 * Current locales for each category
 */
static char current_categories[_LC_LAST][ENCODING_LEN + 1] = {
    "C",
    "C",
    "C",
    "C",
    "C",
    "C",
    "C",
};

/*
 * Path to locale storage directory
 */
char	*_PathLocale;

/*
 * The locales we are going to try and load
 */
static char new_categories[_LC_LAST][ENCODING_LEN + 1];
static char saved_categories[_LC_LAST][ENCODING_LEN + 1];

static char current_locale_string[_LC_LAST * (ENCODING_LEN + 1/*"/"*/ + 1)];

static char	*currentlocale(void);
static char	*loadlocale(int);
static const char *__get_locale_env(int);

char *
setlocale(category, locale)
	int category;
	const char *locale;
{
	int i, j, len, saverr;
        const char *env, *r;

	if (category < LC_ALL || category >= _LC_LAST) {
		errno = EINVAL;
		return (NULL);
	}

	if (locale == NULL)
		return (category != LC_ALL ?
		    current_categories[category] : currentlocale());

	/*
	 * Default to the current locale for everything.
	 */
	for (i = 1; i < _LC_LAST; ++i)
		(void)strcpy(new_categories[i], current_categories[i]);

	/*
	 * Now go fill up new_categories from the locale argument
	 */
	if (!*locale) {
		if (category == LC_ALL) {
			for (i = 1; i < _LC_LAST; ++i) {
				env = __get_locale_env(i);
				if (strlen(env) > ENCODING_LEN) {
					errno = EINVAL;
					return (NULL);
				}
				(void)strcpy(new_categories[i], env);
			}
		} else {
			env = __get_locale_env(category);
			if (strlen(env) > ENCODING_LEN) {
				errno = EINVAL;
				return (NULL);
			}
			(void)strcpy(new_categories[category], env);
		}
	} else if (category != LC_ALL) {
		if (strlen(locale) > ENCODING_LEN) {
			errno = EINVAL;
			return (NULL);
		}
		(void)strcpy(new_categories[category], locale);
	} else {
		if ((r = strchr(locale, '/')) == NULL) {
			if (strlen(locale) > ENCODING_LEN) {
				errno = EINVAL;
				return (NULL);
			}
			for (i = 1; i < _LC_LAST; ++i)
				(void)strcpy(new_categories[i], locale);
		} else {
			for (i = 1; r[1] == '/'; ++r)
				;
			if (!r[1]) {
				errno = EINVAL;
				return (NULL);	/* Hmm, just slashes... */
			}
			do {
				if (i == _LC_LAST)
					break;  /* Too many slashes... */
				if ((len = r - locale) > ENCODING_LEN) {
					errno = EINVAL;
					return (NULL);
				}
				(void)strlcpy(new_categories[i], locale,
					      len + 1);
				i++;
				while (*r == '/')
					r++;
				locale = r;
				while (*r && *r != '/')
					r++;
			} while (*locale);
			while (i < _LC_LAST) {
				(void)strcpy(new_categories[i],
					     new_categories[i-1]);
				i++;
			}
		}
	}

	if (category != LC_ALL)
		return (loadlocale(category));

	for (i = 1; i < _LC_LAST; ++i) {
		(void)strcpy(saved_categories[i], current_categories[i]);
		if (loadlocale(i) == NULL) {
			saverr = errno;
			for (j = 1; j < i; j++) {
				(void)strcpy(new_categories[j],
					     saved_categories[j]);
				if (loadlocale(j) == NULL) {
					(void)strcpy(new_categories[j], "C");
					(void)loadlocale(j);
				}
			}
			errno = saverr;
			return (NULL);
		}
	}
	return (currentlocale());
}

static char *
currentlocale()
{
	int i;

	(void)strcpy(current_locale_string, current_categories[1]);

	for (i = 2; i < _LC_LAST; ++i)
		if (strcmp(current_categories[1], current_categories[i])) {
			for (i = 2; i < _LC_LAST; ++i) {
				(void)strcat(current_locale_string, "/");
				(void)strcat(current_locale_string,
					     current_categories[i]);
			}
			break;
		}
	return (current_locale_string);
}

static char *
loadlocale(category)
	int category;
{
	char *new = new_categories[category];
	char *old = current_categories[category];
	int (*func)(const char *);
	int saved_errno;

	if ((new[0] == '.' &&
	     (new[1] == '\0' || (new[1] == '.' && new[2] == '\0'))) ||
	    strchr(new, '/') != NULL) {
		errno = EINVAL;
		return (NULL);
	}

	saved_errno = errno;
	errno = __detect_path_locale();
	if (errno != 0)
		return (NULL);
	errno = saved_errno;

	switch (category) {
	case LC_CTYPE:
		func = __wrap_setrunelocale;
		break;
	case LC_COLLATE:
		func = __collate_load_tables;
		break;
	case LC_TIME:
		func = __time_load_locale;
		break;
	case LC_NUMERIC:
		func = __numeric_load_locale;
		break;
	case LC_MONETARY:
		func = __monetary_load_locale;
		break;
	case LC_MESSAGES:
		func = __messages_load_locale;
		break;
	default:
		errno = EINVAL;
		return (NULL);
	}

	if (strcmp(new, old) == 0)
		return (old);

	if (func(new) != _LDP_ERROR) {
		(void)strcpy(old, new);
		return (old);
	}

	return (NULL);
}

static const char *
__get_locale_env(category)
        int category;
{
        const char *env;

        /* 1. check LC_ALL. */
        env = getenv(categories[0]);

        /* 2. check LC_* */
	if (env == NULL || !*env)
                env = getenv(categories[category]);

        /* 3. check LANG */
	if (env == NULL || !*env)
                env = getenv("LANG");

        /* 4. if none is set, fall to "C" */
	if (env == NULL || !*env)
                env = "C";

	return (env);
}

/*
 * Detect locale storage location and store its value to _PathLocale variable
 */
int
__detect_path_locale(void)
{
	if (_PathLocale == NULL) {
		char *p = getenv("PATH_LOCALE");

		if (p != NULL && !issetugid()) {
			if (strlen(p) + 1/*"/"*/ + ENCODING_LEN +
			    1/*"/"*/ + CATEGORY_LEN >= PATH_MAX)
				return (ENAMETOOLONG);
			_PathLocale = strdup(p);
			if (_PathLocale == NULL)
				return (errno == 0 ? ENOMEM : errno);
		} else
			_PathLocale = _PATH_LOCALE;
	}
	return (0);
}
Commit	Line	Data
5b2abdfb	1	/*
9385eb3d	2	* Copyright (c) 1996 - 2002 FreeBSD Project
5b2abdfb A	3	* Copyright (c) 1991, 1993
	4	* The Regents of the University of California. All rights reserved.
	5	*
	6	* This code is derived from software contributed to Berkeley by
	7	* Paul Borman at Krystal Technologies.
	8	*
	9	* Redistribution and use in source and binary forms, with or without
	10	* modification, are permitted provided that the following conditions
	11	* are met:
	12	* 1. Redistributions of source code must retain the above copyright
	13	* notice, this list of conditions and the following disclaimer.
	14	* 2. Redistributions in binary form must reproduce the above copyright
	15	* notice, this list of conditions and the following disclaimer in the
	16	* documentation and/or other materials provided with the distribution.
	17	* 3. All advertising materials mentioning features or use of this software
	18	* must display the following acknowledgement:
	19	* This product includes software developed by the University of
	20	* California, Berkeley and its contributors.
	21	* 4. Neither the name of the University nor the names of its contributors
	22	* may be used to endorse or promote products derived from this software
	23	* without specific prior written permission.
	24	*
	25	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	26	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	27	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	28	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	29	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	30	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	31	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	32	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	33	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	34	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	35	* SUCH DAMAGE.
	36	*/
	37
5b2abdfb A	38	#if defined(LIBC_SCCS) && !defined(lint)
	39	static char sccsid[] = "@(#)setlocale.c 8.1 (Berkeley) 7/4/93";
	40	#endif /* LIBC_SCCS and not lint */
9385eb3d	41	#include <sys/cdefs.h>
3d9156a7	42	__FBSDID("$FreeBSD: src/lib/libc/locale/setlocale.c,v 1.50 2004/01/31 19:15:32 ache Exp $");
5b2abdfb A	43
	44	#include <sys/types.h>
	45	#include <sys/stat.h>
9385eb3d	46	#include <errno.h>
5b2abdfb A	47	#include <limits.h>
5b2abdfb A	48	#include <locale.h>
3d9156a7	49	#include <paths.h> /* for _PATH_LOCALE */
5b2abdfb A	50	#include <stdlib.h>
	51	#include <string.h>
	52	#include <unistd.h>
	53	#include "collate.h"
9385eb3d A	54	#include "lmonetary.h" /* for __monetary_load_locale() */
	55	#include "lnumeric.h" /* for __numeric_load_locale() */
	56	#include "lmessages.h" /* for __messages_load_locale() */
5b2abdfb	57	#include "setlocale.h"
9385eb3d A	58	#include "ldpart.h"
9385eb3d A	59	#include "../stdtime/timelocal.h" /* for __time_load_locale() */
5b2abdfb A	60
	61	/*
	62	* Category names for getenv()
	63	*/
	64	static char *categories[_LC_LAST] = {
	65	"LC_ALL",
	66	"LC_COLLATE",
	67	"LC_CTYPE",
	68	"LC_MONETARY",
	69	"LC_NUMERIC",
	70	"LC_TIME",
9385eb3d	71	"LC_MESSAGES",
5b2abdfb A	72	};
	73
	74	/*
	75	* Current locales for each category
	76	*/
	77	static char current_categories[_LC_LAST][ENCODING_LEN + 1] = {
	78	"C",
	79	"C",
	80	"C",
	81	"C",
	82	"C",
	83	"C",
9385eb3d	84	"C",
5b2abdfb A	85	};
5b2abdfb A	86
3d9156a7 A	87	/*
	88	* Path to locale storage directory
	89	*/
	90	char *_PathLocale;
	91
5b2abdfb A	92	/*
	93	* The locales we are going to try and load
	94	*/
	95	static char new_categories[_LC_LAST][ENCODING_LEN + 1];
	96	static char saved_categories[_LC_LAST][ENCODING_LEN + 1];
	97
	98	static char current_locale_string[_LC_LAST * (ENCODING_LEN + 1/"/"/ + 1)];
	99
9385eb3d	100	static char *currentlocale(void);
9385eb3d	101	static char *loadlocale(int);
3d9156a7	102	static const char *__get_locale_env(int);
5b2abdfb A	103
	104	char *
	105	setlocale(category, locale)
	106	int category;
	107	const char *locale;
	108	{
9385eb3d	109	int i, j, len, saverr;
3d9156a7	110	const char env, r;
5b2abdfb	111
9385eb3d A	112	if (category < LC_ALL \|\| category >= _LC_LAST) {
9385eb3d A	113	errno = EINVAL;
5b2abdfb	114	return (NULL);
9385eb3d	115	}
5b2abdfb	116
9385eb3d	117	if (locale == NULL)
5b2abdfb A	118	return (category != LC_ALL ?
	119	current_categories[category] : currentlocale());
	120
	121	/*
	122	* Default to the current locale for everything.
	123	*/
	124	for (i = 1; i < _LC_LAST; ++i)
	125	(void)strcpy(new_categories[i], current_categories[i]);
	126
	127	/*
	128	* Now go fill up new_categories from the locale argument
	129	*/
	130	if (!*locale) {
5b2abdfb A	131	if (category == LC_ALL) {
5b2abdfb A	132	for (i = 1; i < _LC_LAST; ++i) {
3d9156a7 A	133	env = __get_locale_env(i);
3d9156a7 A	134	if (strlen(env) > ENCODING_LEN) {
9385eb3d A	135	errno = EINVAL;
	136	return (NULL);
	137	}
	138	(void)strcpy(new_categories[i], env);
5b2abdfb	139	}
3d9156a7 A	140	} else {
	141	env = __get_locale_env(category);
	142	if (strlen(env) > ENCODING_LEN) {
	143	errno = EINVAL;
	144	return (NULL);
	145	}
	146	(void)strcpy(new_categories[category], env);
5b2abdfb	147	}
9385eb3d A	148	} else if (category != LC_ALL) {
	149	if (strlen(locale) > ENCODING_LEN) {
	150	errno = EINVAL;
	151	return (NULL);
	152	}
	153	(void)strcpy(new_categories[category], locale);
5b2abdfb A	154	} else {
5b2abdfb A	155	if ((r = strchr(locale, '/')) == NULL) {
9385eb3d A	156	if (strlen(locale) > ENCODING_LEN) {
	157	errno = EINVAL;
	158	return (NULL);
5b2abdfb	159	}
9385eb3d A	160	for (i = 1; i < _LC_LAST; ++i)
9385eb3d A	161	(void)strcpy(new_categories[i], locale);
5b2abdfb	162	} else {
9385eb3d A	163	for (i = 1; r[1] == '/'; ++r)
	164	;
	165	if (!r[1]) {
	166	errno = EINVAL;
5b2abdfb	167	return (NULL); /* Hmm, just slashes... */
9385eb3d	168	}
5b2abdfb	169	do {
9385eb3d A	170	if (i == _LC_LAST)
	171	break; /* Too many slashes... */
	172	if ((len = r - locale) > ENCODING_LEN) {
	173	errno = EINVAL;
	174	return (NULL);
	175	}
	176	(void)strlcpy(new_categories[i], locale,
	177	len + 1);
5b2abdfb	178	i++;
3d9156a7 A	179	while (*r == '/')
3d9156a7 A	180	r++;
5b2abdfb	181	locale = r;
3d9156a7 A	182	while (r && r != '/')
3d9156a7 A	183	r++;
5b2abdfb A	184	} while (*locale);
	185	while (i < _LC_LAST) {
	186	(void)strcpy(new_categories[i],
9385eb3d	187	new_categories[i-1]);
5b2abdfb A	188	i++;
	189	}
	190	}
	191	}
	192
9385eb3d	193	if (category != LC_ALL)
5b2abdfb A	194	return (loadlocale(category));
	195
	196	for (i = 1; i < _LC_LAST; ++i) {
	197	(void)strcpy(saved_categories[i], current_categories[i]);
	198	if (loadlocale(i) == NULL) {
9385eb3d	199	saverr = errno;
5b2abdfb A	200	for (j = 1; j < i; j++) {
5b2abdfb A	201	(void)strcpy(new_categories[j],
9385eb3d A	202	saved_categories[j]);
	203	if (loadlocale(j) == NULL) {
	204	(void)strcpy(new_categories[j], "C");
	205	(void)loadlocale(j);
	206	}
5b2abdfb	207	}
9385eb3d	208	errno = saverr;
5b2abdfb A	209	return (NULL);
	210	}
	211	}
	212	return (currentlocale());
	213	}
	214
	215	static char *
	216	currentlocale()
	217	{
	218	int i;
	219
	220	(void)strcpy(current_locale_string, current_categories[1]);
	221
	222	for (i = 2; i < _LC_LAST; ++i)
	223	if (strcmp(current_categories[1], current_categories[i])) {
	224	for (i = 2; i < _LC_LAST; ++i) {
9385eb3d A	225	(void)strcat(current_locale_string, "/");
	226	(void)strcat(current_locale_string,
	227	current_categories[i]);
5b2abdfb A	228	}
	229	break;
	230	}
	231	return (current_locale_string);
	232	}
	233
	234	static char *
	235	loadlocale(category)
	236	int category;
	237	{
5b2abdfb A	238	char *new = new_categories[category];
5b2abdfb A	239	char *old = current_categories[category];
9385eb3d	240	int (func)(const char );
3d9156a7	241	int saved_errno;
9385eb3d A	242
	243	if ((new[0] == '.' &&
	244	(new[1] == '\0' \|\| (new[1] == '.' && new[2] == '\0'))) \|\|
	245	strchr(new, '/') != NULL) {
	246	errno = EINVAL;
	247	return (NULL);
	248	}
5b2abdfb	249
3d9156a7 A	250	saved_errno = errno;
	251	errno = __detect_path_locale();
	252	if (errno != 0)
	253	return (NULL);
	254	errno = saved_errno;
5b2abdfb	255
9385eb3d A	256	switch (category) {
9385eb3d A	257	case LC_CTYPE:
3d9156a7	258	func = __wrap_setrunelocale;
9385eb3d A	259	break;
	260	case LC_COLLATE:
	261	func = __collate_load_tables;
	262	break;
	263	case LC_TIME:
	264	func = __time_load_locale;
	265	break;
	266	case LC_NUMERIC:
	267	func = __numeric_load_locale;
	268	break;
	269	case LC_MONETARY:
	270	func = __monetary_load_locale;
	271	break;
	272	case LC_MESSAGES:
	273	func = __messages_load_locale;
	274	break;
	275	default:
	276	errno = EINVAL;
	277	return (NULL);
5b2abdfb A	278	}
5b2abdfb A	279
9385eb3d A	280	if (strcmp(new, old) == 0)
9385eb3d A	281	return (old);
5b2abdfb	282
9385eb3d A	283	if (func(new) != _LDP_ERROR) {
	284	(void)strcpy(old, new);
	285	return (old);
5b2abdfb A	286	}
5b2abdfb A	287
5b2abdfb A	288	return (NULL);
	289	}
	290
3d9156a7 A	291	static const char *
	292	__get_locale_env(category)
	293	int category;
	294	{
	295	const char *env;
	296
	297	/* 1. check LC_ALL. */
	298	env = getenv(categories[0]);
	299
	300	/* 2. check LC_* */
	301	if (env == NULL \|\| !*env)
	302	env = getenv(categories[category]);
	303
	304	/* 3. check LANG */
	305	if (env == NULL \|\| !*env)
	306	env = getenv("LANG");
	307
	308	/* 4. if none is set, fall to "C" */
	309	if (env == NULL \|\| !*env)
	310	env = "C";
	311
	312	return (env);
	313	}
	314
	315	/*
	316	* Detect locale storage location and store its value to _PathLocale variable
	317	*/
	318	int
	319	__detect_path_locale(void)
	320	{
	321	if (_PathLocale == NULL) {
	322	char *p = getenv("PATH_LOCALE");
	323
	324	if (p != NULL && !issetugid()) {
	325	if (strlen(p) + 1/"/"/ + ENCODING_LEN +
	326	1/"/"/ + CATEGORY_LEN >= PATH_MAX)
	327	return (ENAMETOOLONG);
	328	_PathLocale = strdup(p);
	329	if (_PathLocale == NULL)
	330	return (errno == 0 ? ENOMEM : errno);
	331	} else
	332	_PathLocale = _PATH_LOCALE;
	333	}
	334	return (0);
	335	}
	336