iconvdata/tst-loading.c

   1 /* Tests for loading and unloading of iconv modules.
   2    Copyright (C) 2000-2023 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <iconv.h>
  20 #include <mcheck.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23
  24
  25 /* How many load/unload operations do we do.  */
  26 #define TEST_ROUNDS     5000
  27
  28
  29 enum state { unloaded, loaded };
  30
  31 struct
  32 {
  33   const char *name;
  34   enum state state;
  35   iconv_t cd;
  36 } modules[] =
  37 {
  38 #define MODULE(Name) { .name = #Name, .state = unloaded }
  39   MODULE (ISO-8859-1),
  40   MODULE (ISO-8859-2),
  41   MODULE (ISO-8859-3),
  42   MODULE (ISO-8859-4),
  43   MODULE (ISO-8859-5),
  44   MODULE (ISO-8859-6),
  45   MODULE (ISO-8859-15),
  46   MODULE (EUC-JP),
  47   MODULE (EUC-KR),
  48   MODULE (EUC-CN),
  49   MODULE (EUC-TW),
  50   MODULE (SJIS),
  51   MODULE (UHC),
  52   MODULE (KOI8-R),
  53   MODULE (BIG5),
  54   MODULE (BIG5HKSCS)
  55 };
  56 #define nmodules (sizeof (modules) / sizeof (modules[0]))
  57
  58
  59 /* The test data.  */
  60 static const char inbuf[] =
  61 "The first step is the function to create a handle.\n"
  62 "\n"
  63 " - Function: iconv_t iconv_open (const char *TOCODE, const char\n"
  64 "          *FROMCODE)\n"
  65 "     The `iconv_open' function has to be used before starting a\n"
  66 "     conversion.  The two parameters this function takes determine the\n"
  67 "     source and destination character set for the conversion and if the\n"
  68 "     implementation has the possibility to perform such a conversion the\n"
  69 "     function returns a handle.\n"
  70 "\n"
  71 "     If the wanted conversion is not available the function returns\n"
  72 "     `(iconv_t) -1'.  In this case the global variable `errno' can have\n"
  73 "     the following values:\n"
  74 "\n"
  75 "    `EMFILE'\n"
  76 "          The process already has `OPEN_MAX' file descriptors open.\n"
  77 "\n"
  78 "    `ENFILE'\n"
  79 "          The system limit of open file is reached.\n"
  80 "\n"
  81 "    `ENOMEM'\n"
  82 "          Not enough memory to carry out the operation.\n"
  83 "\n"
  84 "    `EINVAL'\n"
  85 "          The conversion from FROMCODE to TOCODE is not supported.\n"
  86 "\n"
  87 "     It is not possible to use the same descriptor in different threads\n"
  88 "     to perform independent conversions.  Within the data structures\n"
  89 "     associated with the descriptor there is information about the\n"
  90 "     conversion state.  This must not be messed up by using it in\n"
  91 "     different conversions.\n"
  92 "\n"
  93 "     An `iconv' descriptor is like a file descriptor as for every use a\n"
  94 "     new descriptor must be created.  The descriptor does not stand for\n"
  95 "     all of the conversions from FROMSET to TOSET.\n"
  96 "\n"
  97 "     The GNU C library implementation of `iconv_open' has one\n"
  98 "     significant extension to other implementations.  To ease the\n"
  99 "     extension of the set of available conversions the implementation\n"
 100 "     allows storing the necessary files with data and code in\n"
 101 "     arbitrarily many directories.  How this extension has to be\n"
 102 "     written will be explained below (*note glibc iconv\n"
 103 "     Implementation::).  Here it is only important to say that all\n"
 104 "     directories mentioned in the `GCONV_PATH' environment variable are\n"
 105 "     considered if they contain a file `gconv-modules'.  These\n"
 106 "     directories need not necessarily be created by the system\n"
 107 "     administrator.  In fact, this extension is introduced to help users\n"
 108 "     writing and using their own, new conversions.  Of course this does\n"
 109 "     not work for security reasons in SUID binaries; in this case only\n"
 110 "     the system directory is considered and this normally is\n"
 111 "     `PREFIX/lib/gconv'.  The `GCONV_PATH' environment variable is\n"
 112 "     examined exactly once at the first call of the `iconv_open'\n"
 113 "     function.  Later modifications of the variable have no effect.\n";
 114
 115
 116 static int
 117 do_test (void)
 118 {
 119   size_t count = TEST_ROUNDS;
 120   int result = 0;
 121
 122   mtrace ();
 123
 124   /* Just a seed.  */
 125   srandom (TEST_ROUNDS);
 126
 127   while (count--)
 128     {
 129       int idx = random () % nmodules;
 130
 131       if (modules[idx].state == unloaded)
 132         {
 133           char outbuf[10000];
 134           char *inptr = (char *) inbuf;
 135           size_t insize = sizeof (inbuf) - 1;
 136           char *outptr = outbuf;
 137           size_t outsize = sizeof (outbuf);
 138
 139           /* Load the module and do the conversion.  */
 140           modules[idx].cd = iconv_open ("UTF-8", modules[idx].name);
 141
 142           if (modules[idx].cd == (iconv_t) -1)
 143             {
 144               printf ("opening of %s failed: %m\n", modules[idx].name);
 145               result = 1;
 146               break;
 147             }
 148
 149           modules[idx].state = loaded;
 150
 151           /* Now a simple test.  */
 152           if (iconv (modules[idx].cd, &inptr, &insize, &outptr, &outsize) != 0
 153               || *inptr != '\0')
 154             {
 155               printf ("conversion with %s failed\n", modules[idx].name);
 156               result = 1;
 157             }
 158         }
 159       else
 160         {
 161           /* Unload the module.  */
 162           if (iconv_close (modules[idx].cd) != 0)
 163             {
 164               printf ("closing of %s failed: %m\n", modules[idx].name);
 165               result = 1;
 166               break;
 167             }
 168
 169           modules[idx].state = unloaded;
 170         }
 171     }
 172
 173   for (count = 0; count < nmodules; ++count)
 174     if (modules[count].state == loaded && iconv_close (modules[count].cd) != 0)
 175       {
 176         printf ("closing of %s failed: %m\n", modules[count].name);
 177         result = 1;
 178       }
 179
 180   return result;
 181 }
 182
 183 #define TIMEOUT 30
 184 #define TEST_FUNCTION do_test ()
 185 #include "../test-skeleton.c"