usr/src/lib/libc/port/locale/rune.c

   1 /*
   2  * Copyright 2014 Garrett D'Amore <garrett@damore.org>
   3  * Copyright 2010 Nexenta Systems, Inc.  All rights reserved.
   4  * Copyright (c) 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * Paul Borman at Krystal Technologies.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 4. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 #include "lint.h"
  36 #include "file64.h"
  37 #include <errno.h>
  38 #include <stdio.h>
  39 #include <string.h>
  40 #include <stdlib.h>
  41 #include <sys/types.h>
  42 #include <sys/stat.h>
  43 #include <sys/mman.h>
  44 #include <fcntl.h>
  45 #include <unistd.h>
  46
  47 #include "libc.h"
  48 #include "runetype.h"
  49 #include "runefile.h"
  50
  51 _RuneLocale *
  52 _Read_RuneMagi(const char *fname)
  53 {
  54         char *fdata, *data;
  55         void *lastp;
  56         _FileRuneLocale *frl;
  57         _RuneLocale *rl;
  58         _FileRuneEntry *frr;
  59         _RuneEntry *rr;
  60         struct stat sb;
  61         int x, saverr;
  62         void *variable;
  63         _FileRuneEntry *runetype_ext_ranges;
  64         _FileRuneEntry *maplower_ext_ranges;
  65         _FileRuneEntry *mapupper_ext_ranges;
  66         int runetype_ext_len = 0;
  67         int fd;
  68
  69         if ((fd = open(fname, O_RDONLY)) < 0) {
  70                 errno = EINVAL;
  71                 return (NULL);
  72         }
  73
  74         if (fstat(fd, &sb) < 0) {
  75                 (void) close(fd);
  76                 errno = EINVAL;
  77                 return (NULL);
  78         }
  79
  80         if ((size_t)sb.st_size < sizeof (_FileRuneLocale)) {
  81                 (void) close(fd);
  82                 errno = EINVAL;
  83                 return (NULL);
  84         }
  85
  86
  87         fdata = mmap(NULL, sb.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
  88         (void) close(fd);
  89         if (fdata == NULL) {
  90                 errno = EINVAL;
  91                 return (NULL);
  92         }
  93
  94         frl = (_FileRuneLocale *)(void *)fdata;
  95         lastp = fdata + sb.st_size;
  96
  97         variable = frl + 1;
  98
  99         if (memcmp(frl->magic, _FILE_RUNE_MAGIC_1, sizeof (frl->magic))) {
 100                 goto invalid;
 101         }
 102
 103         runetype_ext_ranges = (_FileRuneEntry *)variable;
 104         variable = runetype_ext_ranges + frl->runetype_ext_nranges;
 105         if (variable > lastp) {
 106                 goto invalid;
 107         }
 108
 109         maplower_ext_ranges = (_FileRuneEntry *)variable;
 110         variable = maplower_ext_ranges + frl->maplower_ext_nranges;
 111         if (variable > lastp) {
 112                 goto invalid;
 113         }
 114
 115         mapupper_ext_ranges = (_FileRuneEntry *)variable;
 116         variable = mapupper_ext_ranges + frl->mapupper_ext_nranges;
 117         if (variable > lastp) {
 118                 goto invalid;
 119         }
 120
 121         frr = runetype_ext_ranges;
 122         for (x = 0; x < frl->runetype_ext_nranges; ++x) {
 123                 uint32_t *types;
 124
 125                 if (frr[x].map == 0) {
 126                         int len = frr[x].max - frr[x].min + 1;
 127                         types = variable;
 128                         variable = types + len;
 129                         runetype_ext_len += len;
 130                         if (variable > lastp) {
 131                                 goto invalid;
 132                         }
 133                 }
 134         }
 135
 136         if ((char *)variable + frl->variable_len > (char *)lastp) {
 137                 goto invalid;
 138         }
 139
 140         /*
 141          * Convert from disk format to host format.
 142          */
 143         data = libc_malloc(sizeof (_RuneLocale) +
 144             (frl->runetype_ext_nranges + frl->maplower_ext_nranges +
 145             frl->mapupper_ext_nranges) * sizeof (_RuneEntry) +
 146             runetype_ext_len * sizeof (*rr->__types) +
 147             frl->variable_len);
 148         if (data == NULL) {
 149                 saverr = errno;
 150                 (void) munmap(fdata, sb.st_size);
 151                 errno = saverr;
 152                 return (NULL);
 153         }
 154
 155         rl = (_RuneLocale *)(void *)data;
 156         rl->__variable = rl + 1;
 157
 158         (void) memcpy(rl->__magic, _RUNE_MAGIC_1, sizeof (rl->__magic));
 159         (void) memcpy(rl->__encoding, frl->encoding, sizeof (rl->__encoding));
 160
 161         rl->__variable_len = frl->variable_len;
 162         rl->__runetype_ext.__nranges = frl->runetype_ext_nranges;
 163         rl->__maplower_ext.__nranges = frl->maplower_ext_nranges;
 164         rl->__mapupper_ext.__nranges = frl->mapupper_ext_nranges;
 165
 166         for (x = 0; x < _CACHED_RUNES; ++x) {
 167                 rl->__runetype[x] = frl->runetype[x];
 168                 rl->__maplower[x] = frl->maplower[x];
 169                 rl->__mapupper[x] = frl->mapupper[x];
 170         }
 171
 172         rl->__runetype_ext.__ranges = (_RuneEntry *)rl->__variable;
 173         rl->__variable = rl->__runetype_ext.__ranges +
 174             rl->__runetype_ext.__nranges;
 175
 176         rl->__maplower_ext.__ranges = (_RuneEntry *)rl->__variable;
 177         rl->__variable = rl->__maplower_ext.__ranges +
 178             rl->__maplower_ext.__nranges;
 179
 180         rl->__mapupper_ext.__ranges = (_RuneEntry *)rl->__variable;
 181         rl->__variable = rl->__mapupper_ext.__ranges +
 182             rl->__mapupper_ext.__nranges;
 183
 184         variable = mapupper_ext_ranges + frl->mapupper_ext_nranges;
 185         frr = runetype_ext_ranges;
 186         rr = rl->__runetype_ext.__ranges;
 187         for (x = 0; x < rl->__runetype_ext.__nranges; ++x) {
 188                 uint32_t *types;
 189
 190                 rr[x].__min = frr[x].min;
 191                 rr[x].__max = frr[x].max;
 192                 rr[x].__map = frr[x].map;
 193                 if (rr[x].__map == 0) {
 194                         int len = rr[x].__max - rr[x].__min + 1;
 195                         types = variable;
 196                         variable = types + len;
 197                         rr[x].__types = rl->__variable;
 198                         rl->__variable = rr[x].__types + len;
 199                         while (len-- > 0)
 200                                 rr[x].__types[len] = types[len];
 201                 } else
 202                         rr[x].__types = NULL;
 203         }
 204
 205         frr = maplower_ext_ranges;
 206         rr = rl->__maplower_ext.__ranges;
 207         for (x = 0; x < rl->__maplower_ext.__nranges; ++x) {
 208                 rr[x].__min = frr[x].min;
 209                 rr[x].__max = frr[x].max;
 210                 rr[x].__map = frr[x].map;
 211         }
 212
 213         frr = mapupper_ext_ranges;
 214         rr = rl->__mapupper_ext.__ranges;
 215         for (x = 0; x < rl->__mapupper_ext.__nranges; ++x) {
 216                 rr[x].__min = frr[x].min;
 217                 rr[x].__max = frr[x].max;
 218                 rr[x].__map = frr[x].map;
 219         }
 220
 221         (void) memcpy(rl->__variable, variable, rl->__variable_len);
 222         (void) munmap(fdata, sb.st_size);
 223
 224         /*
 225          * Go out and zero pointers that should be zero.
 226          */
 227         if (!rl->__variable_len)
 228                 rl->__variable = NULL;
 229
 230         if (!rl->__runetype_ext.__nranges)
 231                 rl->__runetype_ext.__ranges = NULL;
 232
 233         if (!rl->__maplower_ext.__nranges)
 234                 rl->__maplower_ext.__ranges = NULL;
 235
 236         if (!rl->__mapupper_ext.__nranges)
 237                 rl->__mapupper_ext.__ranges = NULL;
 238
 239         return (rl);
 240
 241 invalid:
 242         (void) munmap(fdata, sb.st_size);
 243         errno = EINVAL;
 244         return (NULL);
 245 }