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/*
* Copyright (c) 2000, 2001 Alexey Zelkin <phantom@FreeBSD.org>
* All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 <sys/cdefs.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/syslimits.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "setlocale.h"
#include "ldpart.h"
static int split_lines(char *, const char *);
static void set_from_buf(const char *, int, const char **);
int
__part_load_locale(const char *name,
int *using_locale,
char *locale_buf,
const char *category_filename,
int locale_buf_size_max,
int locale_buf_size_min,
const char **dst_localebuf) {
static char locale_buf_C[] = "C";
static int num_lines;
int fd;
char *lbuf;
char *p;
const char *plim;
char filename[PATH_MAX];
struct stat st;
size_t namesize;
size_t bufsize;
int save_using_locale;
char *nptr;
save_using_locale = *using_locale;
*using_locale = 0;
if (name == NULL)
goto no_locale;
if (!strcmp(name, "C") || !strcmp(name, "POSIX"))
return 0;
/*
* If the locale name is the same as our cache, use the cache.
*/
lbuf = locale_buf;
if (lbuf != NULL && strcmp(name, lbuf) == 0) {
set_from_buf(lbuf, num_lines, dst_localebuf);
*using_locale = 1;
return 0;
}
/*
* Slurp the locale file into the cache.
*/
namesize = strlen(name) + 1;
if (!_PathLocale)
goto no_locale;
/* Range checking not needed, 'name' size is limited */
strcpy(filename, _PathLocale);
strcat(filename, "/");
strcat(filename, name);
strcat(filename, "/");
strcat(filename, category_filename);
fd = open(filename, O_RDONLY);
if (fd < 0)
goto no_locale;
#ifdef __USE_INTERNAL_STAT64
if (fstat64(fd, &st) != 0)
#else
if (fstat(fd, &st) != 0)
#endif
goto bad_locale;
if (st.st_size <= 0)
goto bad_locale;
bufsize = namesize + st.st_size;
locale_buf = NULL;
if (lbuf == NULL || lbuf == locale_buf_C)
{
lbuf = malloc(bufsize);
}
else
{
nptr = realloc(lbuf, bufsize);
if (!nptr && lbuf)
free (lbuf);
lbuf = nptr;
}
if (lbuf == NULL)
goto bad_locale;
(void) strcpy(lbuf, name);
p = lbuf + namesize;
plim = p + st.st_size;
if (read(fd, p, (size_t) st.st_size) != st.st_size)
goto bad_lbuf;
if (close(fd) != 0)
goto bad_lbuf;
/*
* Parse the locale file into localebuf.
*/
if (plim[-1] != '\n')
goto bad_lbuf;
num_lines = split_lines(p, plim);
if (num_lines >= locale_buf_size_max)
num_lines = locale_buf_size_max;
else if (num_lines >= locale_buf_size_min)
num_lines = locale_buf_size_min;
else
goto reset_locale;
set_from_buf(lbuf, num_lines, dst_localebuf);
/*
* Record the successful parse in the cache.
*/
locale_buf = lbuf;
*using_locale = 1;
return 0;
reset_locale:
locale_buf = locale_buf_C;
save_using_locale = 0;
bad_lbuf:
free(lbuf);
bad_locale:
(void)close(fd);
no_locale:
*using_locale = save_using_locale;
return -1;
}
static int
split_lines(char *p, const char *plim) {
int i;
for (i = 0; p < plim; i++) {
p = strchr(p, '\n');
*p++ = '\0';
}
return i;
}
static void
set_from_buf(const char *p, int num_lines, const char **dst_localebuf) {
const char **ap;
int i;
for (ap = dst_localebuf, i = 0; i < num_lines; ++ap, ++i)
*ap = p += strlen(p) + 1;
}
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