locale/FreeBSD/ldpart.c

   1 /*
   2  * Copyright (c) 2000, 2001 Alexey Zelkin <phantom@FreeBSD.org>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  */
  26
  27 #include <sys/cdefs.h>
  28 __FBSDID("$FreeBSD: src/lib/libc/locale/ldpart.c,v 1.15 2004/04/25 19:56:50 ache Exp $");
  29
  30 #include "xlocale_private.h"
  31
  32 #include "namespace.h"
  33 #include <sys/types.h>
  34 #include <sys/stat.h>
  35
  36 #include <errno.h>
  37 #include <fcntl.h>
  38 #include <limits.h>
  39 #include <stdlib.h>
  40 #include <string.h>
  41 #include <unistd.h>
  42 #include "un-namespace.h"
  43
  44 #include "ldpart.h"
  45 #include "setlocale.h"
  46
  47 static int split_lines(char *, const char *);
  48
  49 __private_extern__ int
  50 __part_load_locale(const char *name,
  51                 unsigned char *using_locale,
  52                 char **locale_buf,
  53                 const char *category_filename,
  54                 int locale_buf_size_max,
  55                 int locale_buf_size_min,
  56                 const char **dst_localebuf)
  57 {
  58         int             saverr, fd, i, num_lines;
  59         char            *lbuf, *p;
  60         const char      *plim;
  61         char            filename[PATH_MAX];
  62         struct stat     st;
  63         size_t          namesize, bufsize;
  64
  65         /*
  66          * Slurp the locale file into the cache.
  67          */
  68         namesize = strlen(name) + 1;
  69
  70         /* 'PathLocale' must be already set & checked. */
  71
  72         /* Range checking not needed, 'name' size is limited */
  73         strcpy(filename, name);
  74         strcat(filename, "/");
  75         strcat(filename, category_filename);
  76         if ((fd = __open_path_locale(filename)) < 0)
  77                 return (_LDP_ERROR);
  78         if (_fstat(fd, &st) != 0)
  79                 goto bad_locale;
  80         if (st.st_size <= 0) {
  81                 errno = EFTYPE;
  82                 goto bad_locale;
  83         }
  84         bufsize = namesize + st.st_size;
  85         if ((lbuf = malloc(bufsize)) == NULL) {
  86                 errno = ENOMEM;
  87                 goto bad_locale;
  88         }
  89         (void)strcpy(lbuf, name);
  90         p = lbuf + namesize;
  91         plim = p + st.st_size;
  92         if (_read(fd, p, (size_t) st.st_size) != st.st_size)
  93                 goto bad_lbuf;
  94         /*
  95          * Parse the locale file into localebuf.
  96          */
  97         if (plim[-1] != '\n') {
  98                 errno = EFTYPE;
  99                 goto bad_lbuf;
 100         }
 101         num_lines = split_lines(p, plim);
 102         if (num_lines >= locale_buf_size_max)
 103                 num_lines = locale_buf_size_max;
 104         else if (num_lines < locale_buf_size_min) {
 105                 errno = EFTYPE;
 106                 goto bad_lbuf;
 107         }
 108         (void)_close(fd);
 109         /*
 110          * Record the successful parse in the cache.
 111          */
 112         if (*locale_buf != NULL)
 113                 free(*locale_buf);
 114         *locale_buf = lbuf;
 115         for (p = *locale_buf, i = 0; i < num_lines; i++)
 116                 dst_localebuf[i] = (p += strlen(p) + 1);
 117         for (i = num_lines; i < locale_buf_size_max; i++)
 118                 dst_localebuf[i] = NULL;
 119         *using_locale = 1;
 120
 121         return (_LDP_LOADED);
 122
 123 bad_lbuf:
 124         saverr = errno;
 125         free(lbuf);
 126         errno = saverr;
 127 bad_locale:
 128         saverr = errno;
 129         (void)_close(fd);
 130         errno = saverr;
 131
 132         return (_LDP_ERROR);
 133 }
 134
 135 static int
 136 split_lines(char *p, const char *plim)
 137 {
 138         int i;
 139
 140         i = 0;
 141         while (p < plim) {
 142                 if (*p == '\n') {
 143                         *p = '\0';
 144                         i++;
 145                 }
 146                 p++;
 147         }
 148         return (i);
 149 }
 150
 151 __private_extern__ void
 152 __ldpart_free_extra(struct __xlocale_st_ldpart *lp)
 153 {
 154         if (lp)
 155                 free(lp->_locale_buf);
 156 }