setrunelocale.c revision 101260 
1/*-
2 * Copyright (c) 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Paul Borman at Krystal Technologies.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *	This product includes software developed by the University of
19 *	California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37#include <sys/cdefs.h>
38__FBSDID("$FreeBSD: head/lib/libc/locale/setrunelocale.c 101260 2002-08-03 09:07:27Z ache $");
39
40#include <rune.h>
41#include <errno.h>
42#include <limits.h>
43#include <string.h>
44#include <stdio.h>
45#include <stdlib.h>
46#include <unistd.h>
47#include "setlocale.h"
48
49extern int		_none_init(_RuneLocale *);
50extern int		_UTF2_init(_RuneLocale *);
51extern int		_EUC_init(_RuneLocale *);
52extern int		_BIG5_init(_RuneLocale *);
53extern int		_MSKanji_init(_RuneLocale *);
54extern _RuneLocale      *_Read_RuneMagi(FILE *);
55
56int
57setrunelocale(encoding)
58	char *encoding;
59{
60	FILE *fp;
61	char name[PATH_MAX];
62	_RuneLocale *rl;
63
64	if (!encoding || strlen(encoding) > ENCODING_LEN)
65	    return(EFAULT);
66
67	/*
68	 * The "C" and "POSIX" locale are always here.
69	 */
70	if (!strcmp(encoding, "C") || !strcmp(encoding, "POSIX")) {
71		_CurrentRuneLocale = &_DefaultRuneLocale;
72		return(0);
73	}
74
75	if (_PathLocale == NULL) {
76		char *p = getenv("PATH_LOCALE");
77
78		if (p != NULL
79#ifndef __NETBSD_SYSCALLS
80			&& !issetugid()
81#endif
82			) {
83			if (strlen(p) + 1/*"/"*/ + ENCODING_LEN +
84			    1/*"/"*/ + CATEGORY_LEN >= PATH_MAX)
85				return (ENAMETOOLONG);
86			_PathLocale = strdup(p);
87			if (_PathLocale == NULL)
88				return (errno);
89		} else
90			_PathLocale = _PATH_LOCALE;
91	}
92	/* Range checking not needed, encoding length already checked above */
93	(void) strcpy(name, _PathLocale);
94	(void) strcat(name, "/");
95	(void) strcat(name, encoding);
96	(void) strcat(name, "/LC_CTYPE");
97
98	if ((fp = fopen(name, "r")) == NULL)
99		return(ENOENT);
100
101	if ((rl = _Read_RuneMagi(fp)) == 0) {
102		fclose(fp);
103		return(EFTYPE);
104	}
105	fclose(fp);
106
107	if (!rl->encoding[0])
108		return(EINVAL);
109	else if (!strcmp(rl->encoding, "NONE"))
110		return(_none_init(rl));
111	else if (!strcmp(rl->encoding, "UTF2"))
112		return(_UTF2_init(rl));
113	else if (!strcmp(rl->encoding, "EUC"))
114		return(_EUC_init(rl));
115	else if (!strcmp(rl->encoding, "BIG5"))
116		return(_BIG5_init(rl));
117	else if (!strcmp(rl->encoding, "MSKanji"))
118		return(_MSKanji_init(rl));
119	else
120		return(EINVAL);
121}
122
123