iconvdata/tst-loading.c

   1 /* Tests for loading and unloading of iconv modules.
   2    Copyright (C) 2000-2017 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Ulrich Drepper <drepper@cygnus.com>, 2000.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <iconv.h>
  21 #include <mcheck.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24
  25
  26 /* How many load/unload operations do we do.  */
  27 #define TEST_ROUNDS     5000
  28
  29
  30 enum state { unloaded, loaded };
  31
  32 struct
  33 {
  34   const char *name;
  35   enum state state;
  36   iconv_t cd;
  37 } modules[] =
  38 {
  39 #define MODULE(Name) { .name = #Name, .state = unloaded }
  40   MODULE (ISO-8859-1),
  41   MODULE (ISO-8859-2),
  42   MODULE (ISO-8859-3),
  43   MODULE (ISO-8859-4),
  44   MODULE (ISO-8859-5),
  45   MODULE (ISO-8859-6),
  46   MODULE (ISO-8859-15),
  47   MODULE (EUC-JP),
  48   MODULE (EUC-KR),
  49   MODULE (EUC-CN),
  50   MODULE (EUC-TW),
  51   MODULE (SJIS),
  52   MODULE (UHC),
  53   MODULE (KOI8-R),
  54   MODULE (BIG5),
  55   MODULE (BIG5HKSCS)
  56 };
  57 #define nmodules (sizeof (modules) / sizeof (modules[0]))
  58
  59
  60 /* The test data.  */
  61 static const char inbuf[] =
  62 "The first step is the function to create a handle.\n"
  63 "\n"
  64 " - Function: iconv_t iconv_open (const char *TOCODE, const char\n"
  65 "          *FROMCODE)\n"
  66 "     The `iconv_open' function has to be used before starting a\n"
  67 "     conversion.  The two parameters this function takes determine the\n"
  68 "     source and destination character set for the conversion and if the\n"
  69 "     implementation has the possibility to perform such a conversion the\n"
  70 "     function returns a handle.\n"
  71 "\n"
  72 "     If the wanted conversion is not available the function returns\n"
  73 "     `(iconv_t) -1'.  In this case the global variable `errno' can have\n"
  74 "     the following values:\n"
  75 "\n"
  76 "    `EMFILE'\n"
  77 "          The process already has `OPEN_MAX' file descriptors open.\n"
  78 "\n"
  79 "    `ENFILE'\n"
  80 "          The system limit of open file is reached.\n"
  81 "\n"
  82 "    `ENOMEM'\n"
  83 "          Not enough memory to carry out the operation.\n"
  84 "\n"
  85 "    `EINVAL'\n"
  86 "          The conversion from FROMCODE to TOCODE is not supported.\n"
  87 "\n"
  88 "     It is not possible to use the same descriptor in different threads\n"
  89 "     to perform independent conversions.  Within the data structures\n"
  90 "     associated with the descriptor there is information about the\n"
  91 "     conversion state.  This must not be messed up by using it in\n"
  92 "     different conversions.\n"
  93 "\n"
  94 "     An `iconv' descriptor is like a file descriptor as for every use a\n"
  95 "     new descriptor must be created.  The descriptor does not stand for\n"
  96 "     all of the conversions from FROMSET to TOSET.\n"
  97 "\n"
  98 "     The GNU C library implementation of `iconv_open' has one\n"
  99 "     significant extension to other implementations.  To ease the\n"
 100 "     extension of the set of available conversions the implementation\n"
 101 "     allows storing the necessary files with data and code in\n"
 102 "     arbitrarily many directories.  How this extension has to be\n"
 103 "     written will be explained below (*note glibc iconv\n"
 104 "     Implementation::).  Here it is only important to say that all\n"
 105 "     directories mentioned in the `GCONV_PATH' environment variable are\n"
 106 "     considered if they contain a file `gconv-modules'.  These\n"
 107 "     directories need not necessarily be created by the system\n"
 108 "     administrator.  In fact, this extension is introduced to help users\n"
 109 "     writing and using their own, new conversions.  Of course this does\n"
 110 "     not work for security reasons in SUID binaries; in this case only\n"
 111 "     the system directory is considered and this normally is\n"
 112 "     `PREFIX/lib/gconv'.  The `GCONV_PATH' environment variable is\n"
 113 "     examined exactly once at the first call of the `iconv_open'\n"
 114 "     function.  Later modifications of the variable have no effect.\n";
 115
 116
 117 static int
 118 do_test (void)
 119 {
 120   size_t count = TEST_ROUNDS;
 121   int result = 0;
 122
 123   mtrace ();
 124
 125   /* Just a seed.  */
 126   srandom (TEST_ROUNDS);
 127
 128   while (count--)
 129     {
 130       int idx = random () % nmodules;
 131
 132       if (modules[idx].state == unloaded)
 133         {
 134           char outbuf[10000];
 135           char *inptr = (char *) inbuf;
 136           size_t insize = sizeof (inbuf) - 1;
 137           char *outptr = outbuf;
 138           size_t outsize = sizeof (outbuf);
 139
 140           /* Load the module and do the conversion.  */
 141           modules[idx].cd = iconv_open ("UTF-8", modules[idx].name);
 142
 143           if (modules[idx].cd == (iconv_t) -1)
 144             {
 145               printf ("opening of %s failed: %m\n", modules[idx].name);
 146               result = 1;
 147               break;
 148             }
 149
 150           modules[idx].state = loaded;
 151
 152           /* Now a simple test.  */
 153           if (iconv (modules[idx].cd, &inptr, &insize, &outptr, &outsize) != 0
 154               || *inptr != '\0')
 155             {
 156               printf ("conversion with %s failed\n", modules[idx].name);
 157               result = 1;
 158             }
 159         }
 160       else
 161         {
 162           /* Unload the module.  */
 163           if (iconv_close (modules[idx].cd) != 0)
 164             {
 165               printf ("closing of %s failed: %m\n", modules[idx].name);
 166               result = 1;
 167               break;
 168             }
 169
 170           modules[idx].state = unloaded;
 171         }
 172     }
 173
 174   for (count = 0; count < nmodules; ++count)
 175     if (modules[count].state == loaded && iconv_close (modules[count].cd) != 0)
 176       {
 177         printf ("closing of %s failed: %m\n", modules[count].name);
 178         result = 1;
 179       }
 180
 181   return result;
 182 }
 183
 184 #define TEST_FUNCTION do_test ()
 185 #include "../test-skeleton.c"