freebsd-dev/lib/libc/locale/setrunelocale.c

131 lines
3.8 KiB
C

/*-
* Copyright (c) 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.
*/
#include <rune.h>
#include <errno.h>
#include <limits.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "setlocale.h"
extern int _none_init __P((_RuneLocale *));
#ifdef XPG4
extern int _UTF2_init __P((_RuneLocale *));
extern int _EUC_init __P((_RuneLocale *));
extern int _xpg4_setrunelocale __P((char *));
#endif
extern _RuneLocale *_Read_RuneMagi __P((FILE *));
#ifdef XPG4
int
setrunelocale(encoding)
char *encoding;
{
return _xpg4_setrunelocale(encoding);
}
#endif
int
#ifndef XPG4
setrunelocale(encoding)
#else
_xpg4_setrunelocale(encoding)
#endif
char *encoding;
{
FILE *fp;
char name[PATH_MAX];
_RuneLocale *rl;
if (!encoding || strlen(encoding) > ENCODING_LEN)
return(EFAULT);
/*
* The "C" and "POSIX" locale are always here.
*/
if (!strcmp(encoding, "C") || !strcmp(encoding, "POSIX")) {
_CurrentRuneLocale = &_DefaultRuneLocale;
return(0);
}
if (_PathLocale == NULL) {
char *p = getenv("PATH_LOCALE");
if (p != NULL && !issetugid()) {
if (strlen(p) + 1/*"/"*/ + ENCODING_LEN +
1/*"/"*/ + CATEGORY_LEN >= PATH_MAX)
return(EFAULT);
_PathLocale = strdup(p);
if (_PathLocale == NULL)
return (errno);
} else
_PathLocale = _PATH_LOCALE;
}
/* Range checking not needed, encoding length already checked above */
(void) strcpy(name, _PathLocale);
(void) strcat(name, "/");
(void) strcat(name, encoding);
(void) strcat(name, "/LC_CTYPE");
if ((fp = fopen(name, "r")) == NULL)
return(ENOENT);
if ((rl = _Read_RuneMagi(fp)) == 0) {
fclose(fp);
return(EFTYPE);
}
fclose(fp);
#ifdef XPG4
if (!rl->encoding[0] || !strcmp(rl->encoding, "UTF2")) {
return(_UTF2_init(rl));
#else
if (!rl->encoding[0]) {
return(EINVAL);
#endif
} else if (!strcmp(rl->encoding, "NONE")) {
return(_none_init(rl));
#ifdef XPG4
} else if (!strcmp(rl->encoding, "EUC")) {
return(_EUC_init(rl));
#endif
} else
return(EINVAL);
}