libio/tst-fopenloc.c

   1 /* Test for ,ccs= handling in fopen.
   2    Copyright (C) 2001-2023 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 <errno.h>
  20 #include <locale.h>
  21 #include <mcheck.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <wchar.h>
  26 #include <sys/resource.h>
  27 #include <support/support.h>
  28 #include <support/xstdio.h>
  29
  30 static const char inputfile[] = "../iconvdata/testdata/ISO-8859-1";
  31
  32 static int
  33 do_bz17916 (void)
  34 {
  35   /* BZ #17916 -- check invalid large ccs= case.  */
  36   struct rlimit rl;
  37   getrlimit (RLIMIT_STACK, &rl);
  38   rl.rlim_cur = 1024 * 1024;
  39   setrlimit (RLIMIT_STACK, &rl);
  40
  41   const size_t sz = 2 * 1024 * 1024;
  42   char *ccs = xmalloc (sz);
  43   strcpy (ccs, "r,ccs=");
  44   memset (ccs + 6, 'A', sz - 6 - 1);
  45   ccs[sz - 1] = '\0';
  46
  47   FILE *fp = fopen (inputfile, ccs);
  48   if (fp != NULL)
  49     {
  50       printf ("unxpected success\n");
  51       return 1;
  52     }
  53   free (ccs);
  54
  55   return 0;
  56 }
  57
  58 static int
  59 do_test (void)
  60 {
  61   FILE *fp;
  62
  63   mtrace ();
  64
  65   xsetlocale (LC_ALL, "de_DE.UTF-8");
  66
  67   fp = xfopen (inputfile, "r,ccs=ISO-8859-1");
  68
  69   while (! feof_unlocked (fp))
  70     {
  71       wchar_t buf[200];
  72
  73       if (fgetws_unlocked (buf, sizeof (buf) / sizeof (buf[0]), fp) == NULL)
  74         break;
  75
  76       fputws (buf, stdout);
  77     }
  78
  79   xfclose (fp);
  80
  81   return do_bz17916 ();
  82 }
  83
  84 #include <support/test-driver.c>