freebsd-dev/lib/libc/locale/ldpart.c
Pedro F. Giffuni d915a14ef0 libc: further adoption of SPDX licensing ID tags.
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using mis-identified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.
2017-11-25 17:12:48 +00:00

169 lines
4.2 KiB
C

/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* 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>
__FBSDID("$FreeBSD$");
#include "namespace.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "un-namespace.h"
#include "ldpart.h"
#include "setlocale.h"
static int split_lines(char *, 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)
{
int saverr, fd, i, num_lines;
char *lbuf, *p;
const char *plim;
char filename[PATH_MAX];
struct stat st;
size_t namesize, bufsize;
/* 'name' must be already checked. */
if (strcmp(name, "C") == 0 || strcmp(name, "POSIX") == 0) {
*using_locale = 0;
return (_LDP_CACHE);
}
/*
* If the locale name is the same as our cache, use the cache.
*/
if (*locale_buf != NULL && strcmp(name, *locale_buf) == 0) {
*using_locale = 1;
return (_LDP_CACHE);
}
/*
* Slurp the locale file into the cache.
*/
namesize = strlen(name) + 1;
/* 'PathLocale' must be already set & checked. */
/* Range checking not needed, 'name' size is limited */
strcpy(filename, _PathLocale);
strcat(filename, "/");
strcat(filename, name);
strcat(filename, "/");
strcat(filename, category_filename);
if ((fd = _open(filename, O_RDONLY | O_CLOEXEC)) < 0)
return (_LDP_ERROR);
if (_fstat(fd, &st) != 0)
goto bad_locale;
if (st.st_size <= 0) {
errno = EFTYPE;
goto bad_locale;
}
bufsize = namesize + st.st_size;
if ((lbuf = malloc(bufsize)) == NULL) {
errno = ENOMEM;
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;
/*
* Parse the locale file into localebuf.
*/
if (plim[-1] != '\n') {
errno = EFTYPE;
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 {
errno = EFTYPE;
goto bad_lbuf;
}
(void)_close(fd);
/*
* Record the successful parse in the cache.
*/
if (*locale_buf != NULL)
free(*locale_buf);
*locale_buf = lbuf;
for (p = *locale_buf, i = 0; i < num_lines; i++)
dst_localebuf[i] = (p += strlen(p) + 1);
for (i = num_lines; i < locale_buf_size_max; i++)
dst_localebuf[i] = NULL;
*using_locale = 1;
return (_LDP_LOADED);
bad_lbuf:
saverr = errno;
free(lbuf);
errno = saverr;
bad_locale:
saverr = errno;
(void)_close(fd);
errno = saverr;
return (_LDP_ERROR);
}
static int
split_lines(char *p, const char *plim)
{
int i;
i = 0;
while (p < plim) {
if (*p == '\n') {
*p = '\0';
i++;
}
p++;
}
return (i);
}