setrunelocale.c revision 38333 
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 <rune.h>
38#include <errno.h>
39#include <limits.h>
40#include <string.h>
41#include <stdio.h>
42#include <stdlib.h>
43#include <unistd.h>
44#include "setlocale.h"
45
46extern int		_none_init __P((_RuneLocale *));
47#ifdef XPG4
48extern int		_UTF2_init __P((_RuneLocale *));
49extern int		_EUC_init __P((_RuneLocale *));
50extern int		_BIG5_init __P((_RuneLocale *));
51extern int		_MSKanji_init __P((_RuneLocale *));
52extern int              _xpg4_setrunelocale __P((char *));
53#endif
54extern _RuneLocale      *_Read_RuneMagi __P((FILE *));
55
56#ifdef XPG4
57int
58setrunelocale(encoding)
59	char *encoding;
60{
61	return _xpg4_setrunelocale(encoding);
62}
63#endif
64
65int
66#ifndef XPG4
67setrunelocale(encoding)
68#else
69_xpg4_setrunelocale(encoding)
70#endif
71	char *encoding;
72{
73	FILE *fp;
74	char name[PATH_MAX];
75	_RuneLocale *rl;
76
77	if (!encoding || strlen(encoding) > ENCODING_LEN)
78	    return(EFAULT);
79
80	/*
81	 * The "C" and "POSIX" locale are always here.
82	 */
83	if (!strcmp(encoding, "C") || !strcmp(encoding, "POSIX")) {
84		_CurrentRuneLocale = &_DefaultRuneLocale;
85		return(0);
86	}
87
88	if (_PathLocale == NULL) {
89		char *p = getenv("PATH_LOCALE");
90
91		if (p != NULL
92#ifndef __NETBSD_SYSCALLS
93			&& !issetugid()
94#endif
95			) {
96			if (strlen(p) + 1/*"/"*/ + ENCODING_LEN +
97			    1/*"/"*/ + CATEGORY_LEN >= PATH_MAX)
98				return(EFAULT);
99			_PathLocale = strdup(p);
100			if (_PathLocale == NULL)
101				return (errno);
102		} else
103			_PathLocale = _PATH_LOCALE;
104	}
105	/* Range checking not needed, encoding length already checked above */
106	(void) strcpy(name, _PathLocale);
107	(void) strcat(name, "/");
108	(void) strcat(name, encoding);
109	(void) strcat(name, "/LC_CTYPE");
110
111	if ((fp = fopen(name, "r")) == NULL)
112		return(ENOENT);
113
114	if ((rl = _Read_RuneMagi(fp)) == 0) {
115		fclose(fp);
116		return(EFTYPE);
117	}
118	fclose(fp);
119
120#ifdef XPG4
121	if (!rl->encoding[0] || !strcmp(rl->encoding, "UTF2"))
122		return(_UTF2_init(rl));
123#else
124	if (!rl->encoding[0])
125		return(EINVAL);
126#endif
127	else if (!strcmp(rl->encoding, "NONE"))
128		return(_none_init(rl));
129#ifdef XPG4
130	else if (!strcmp(rl->encoding, "EUC"))
131		return(_EUC_init(rl));
132	else if (!strcmp(rl->encoding, "BIG5"))
133		return(_BIG5_init(rl));
134	else if (!strcmp(rl->encoding, "MSKanji"))
135		return(_MSKanji_init(rl));
136#endif
137	else
138		return(EINVAL);
139}
140
141