libio/tst-fopenloc.c

   1 /* Test for ,ccs= handling in fopen.
   2    Copyright (C) 2001-2021 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Ulrich Drepper <drepper@cygnus.com>, 2001.
   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    <https://www.gnu.org/licenses/>.  */
  19
  20 #include <errno.h>
  21 #include <locale.h>
  22 #include <mcheck.h>
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <wchar.h>
  27 #include <sys/resource.h>
  28 #include <support/support.h>
  29 #include <support/xstdio.h>
  30
  31 static const char inputfile[] = "../iconvdata/testdata/ISO-8859-1";
  32
  33 static int
  34 do_bz17916 (void)
  35 {
  36   /* BZ #17916 -- check invalid large ccs= case.  */
  37   struct rlimit rl;
  38   getrlimit (RLIMIT_STACK, &rl);
  39   rl.rlim_cur = 1024 * 1024;
  40   setrlimit (RLIMIT_STACK, &rl);
  41
  42   const size_t sz = 2 * 1024 * 1024;
  43   char *ccs = xmalloc (sz);
  44   strcpy (ccs, "r,ccs=");
  45   memset (ccs + 6, 'A', sz - 6 - 1);
  46   ccs[sz - 1] = '\0';
  47
  48   FILE *fp = fopen (inputfile, ccs);
  49   if (fp != NULL)
  50     {
  51       printf ("unxpected success\n");
  52       return 1;
  53     }
  54   free (ccs);
  55
  56   return 0;
  57 }
  58
  59 static int
  60 do_test (void)
  61 {
  62   FILE *fp;
  63
  64   mtrace ();
  65
  66   xsetlocale (LC_ALL, "de_DE.UTF-8");
  67
  68   fp = xfopen (inputfile, "r,ccs=ISO-8859-1");
  69
  70   while (! feof_unlocked (fp))
  71     {
  72       wchar_t buf[200];
  73
  74       if (fgetws_unlocked (buf, sizeof (buf) / sizeof (buf[0]), fp) == NULL)
  75         break;
  76
  77       fputws (buf, stdout);
  78     }
  79
  80   xfclose (fp);
  81
  82   return do_bz17916 ();
  83 }
  84
  85 #include <support/test-driver.c>