192 lines
4.6 KiB
C
192 lines
4.6 KiB
C
/*
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* Copyright (c) 2000, 2001 Alexey Zelkin <phantom@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/syslimits.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "setlocale.h"
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#include "ldpart.h"
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static int split_lines(char *, const char *);
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static void set_from_buf(const char *, int, const char **);
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int
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__part_load_locale(const char *name,
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int *using_locale,
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char *locale_buf,
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const char *category_filename,
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int locale_buf_size_max,
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int locale_buf_size_min,
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const char **dst_localebuf) {
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static char locale_buf_C[] = "C";
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static int num_lines;
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int fd;
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char *lbuf;
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char *p;
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const char *plim;
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char filename[PATH_MAX];
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#ifdef __USE_INTERNAL_STAT64
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struct stat64 st;
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#else
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struct stat st;
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#endif
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size_t namesize;
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size_t bufsize;
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int save_using_locale;
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char *nptr;
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save_using_locale = *using_locale;
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*using_locale = 0;
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if (name == NULL)
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goto no_locale;
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if (!strcmp(name, "C") || !strcmp(name, "POSIX"))
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return 0;
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/*
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* If the locale name is the same as our cache, use the cache.
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*/
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lbuf = locale_buf;
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if (lbuf != NULL && strcmp(name, lbuf) == 0) {
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set_from_buf(lbuf, num_lines, dst_localebuf);
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*using_locale = 1;
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return 0;
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}
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/*
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* Slurp the locale file into the cache.
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*/
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namesize = strlen(name) + 1;
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if (!_PathLocale)
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goto no_locale;
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/* Range checking not needed, 'name' size is limited */
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strcpy(filename, _PathLocale);
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strcat(filename, "/");
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strcat(filename, name);
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strcat(filename, "/");
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strcat(filename, category_filename);
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fd = open(filename, O_RDONLY);
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if (fd < 0)
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goto no_locale;
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#ifdef __USE_INTERNAL_STAT64
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if (fstat64(fd, &st) != 0)
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#else
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if (fstat(fd, &st) != 0)
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#endif
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goto bad_locale;
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if (st.st_size <= 0)
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goto bad_locale;
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bufsize = namesize + st.st_size;
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locale_buf = NULL;
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if (lbuf == NULL || lbuf == locale_buf_C)
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{
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lbuf = malloc(bufsize);
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}
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else
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{
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nptr = realloc(lbuf, bufsize);
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if (!nptr && lbuf)
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free (lbuf);
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lbuf = nptr;
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}
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if (lbuf == NULL)
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goto bad_locale;
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(void) strcpy(lbuf, name);
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p = lbuf + namesize;
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plim = p + st.st_size;
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if (read(fd, p, (size_t) st.st_size) != st.st_size)
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goto bad_lbuf;
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if (close(fd) != 0)
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goto bad_lbuf;
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/*
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* Parse the locale file into localebuf.
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*/
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if (plim[-1] != '\n')
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goto bad_lbuf;
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num_lines = split_lines(p, plim);
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if (num_lines >= locale_buf_size_max)
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num_lines = locale_buf_size_max;
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else if (num_lines >= locale_buf_size_min)
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num_lines = locale_buf_size_min;
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else
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goto reset_locale;
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set_from_buf(lbuf, num_lines, dst_localebuf);
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/*
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* Record the successful parse in the cache.
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*/
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locale_buf = lbuf;
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*using_locale = 1;
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return 0;
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reset_locale:
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locale_buf = locale_buf_C;
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save_using_locale = 0;
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bad_lbuf:
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free(lbuf);
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bad_locale:
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(void)close(fd);
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no_locale:
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*using_locale = save_using_locale;
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return -1;
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}
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static int
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split_lines(char *p, const char *plim) {
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int i;
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for (i = 0; p < plim; i++) {
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p = strchr(p, '\n');
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*p++ = '\0';
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}
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return i;
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}
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static void
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set_from_buf(const char *p, int num_lines, const char **dst_localebuf) {
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const char **ap;
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int i;
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for (ap = dst_localebuf, i = 0; i < num_lines; ++ap, ++i)
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*ap = p += strlen(p) + 1;
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}
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