1  /* Test wide output conversion for warn.
       2     Copyright (C) 2018-2023 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 <err.h>
      20  #include <errno.h>
      21  #include <stdio.h>
      22  #include <stdlib.h>
      23  #include <string.h>
      24  #include <support/check.h>
      25  #include <support/xmemstream.h>
      26  #include <wchar.h>
      27  
      28  /* Used to trigger the large-string path in __fxprintf.  */
      29  #define PADDING \
      30    "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX" \
      31    "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX" \
      32    "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
      33  
      34  #define LPADDING \
      35    L"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"  \
      36    "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX" \
      37    "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
      38  
      39  
      40  static void
      41  one_test (const char *message, int error_code, const wchar_t *expected)
      42  {
      43    wchar_t *buffer = NULL;
      44    size_t length = 0;
      45    FILE *fp = open_wmemstream (&buffer, &length);
      46    TEST_VERIFY_EXIT (fp != NULL);
      47    FILE *old_stderr = stderr;
      48    stderr = fp;
      49    errno = error_code;
      50    switch (error_code)
      51      {
      52      case E2BIG:
      53        warn ("%s with padding " PADDING, message);
      54        break;
      55      case EAGAIN:
      56        warn ("%s", message);
      57        break;
      58      case -1:
      59        warnx ("%s", message);
      60        break;
      61      case -2:
      62        warnx ("%s with padding " PADDING, message);
      63        break;
      64      }
      65    stderr = old_stderr;
      66    TEST_VERIFY_EXIT (!ferror (fp));
      67    TEST_COMPARE (fclose (fp), 0);
      68    if (wcscmp (buffer, expected) != 0)
      69      FAIL_EXIT1 ("unexpected output: %ls", buffer);
      70    free (buffer);
      71  }
      72  
      73  static int
      74  do_test (void)
      75  {
      76    one_test ("no errno", -1,
      77              L"tst-warn-wide: no errno\n");
      78    one_test ("no errno", -2,
      79              L"tst-warn-wide: no errno with padding " PADDING "\n");
      80    one_test ("with errno", EAGAIN,
      81              L"tst-warn-wide: with errno: Resource temporarily unavailable\n");
      82    one_test ("with errno", E2BIG,
      83              L"tst-warn-wide: with errno with padding " PADDING
      84              ": Argument list too long\n");
      85    return 0;
      86  }
      87  
      88  #include <support/test-driver.c>