1  /* Test of strsignal() function.
       2     Copyright (C) 2008-2021 Free Software Foundation, Inc.
       3  
       4     This program is free software; you can redistribute it and/or modify
       5     it under the terms of the GNU General Public License as published by
       6     the Free Software Foundation; either version 3, or (at your option)
       7     any later version.
       8  
       9     This program is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      12     GNU General Public License for more details.
      13  
      14     You should have received a copy of the GNU General Public License
      15     along with this program; if not, see <https://www.gnu.org/licenses/>.  */
      16  
      17  /* Written by Colin Watson <cjwatson@debian.org>, 2008.  */
      18  
      19  #include <config.h>
      20  
      21  #include <string.h>
      22  
      23  #include "signature.h"
      24  SIGNATURE_CHECK (strsignal, char *, (int));
      25  
      26  #include <signal.h>
      27  
      28  #include "macros.h"
      29  
      30  #if HAVE_DECL_SYS_SIGLIST
      31  # define ASSERT_DESCRIPTION(actual, expected)
      32  #else
      33  /* In this case, we can guarantee some signal descriptions.
      34     But allow the actual result to be longer than the expected result.  */
      35  # define ASSERT_DESCRIPTION(actual, expected) \
      36     ASSERT (strncmp (actual, expected, strlen (expected)) == 0)
      37  #endif
      38  
      39  int
      40  main (void)
      41  {
      42    /* Work around bug in cygwin 1.5.25 <string.h> by declaring str as
      43       const char *, even though strsignal is supposed to return char *.
      44       At any rate, this doesn't hurt, since POSIX 200x states that "The
      45       string pointed to shall not be modified by the application."  */
      46    const char *str;
      47  
      48    /* We try a couple of signals, since not all signals are supported
      49       everywhere.  Notwithstanding the #ifdef for neatness, SIGINT should in
      50       fact be available on all platforms.  */
      51  
      52  #ifdef SIGHUP
      53    str = strsignal (SIGHUP);
      54    ASSERT (str);
      55    ASSERT (*str);
      56    ASSERT_DESCRIPTION (str, "Hangup");
      57  #endif
      58  
      59  #ifdef SIGINT
      60    str = strsignal (SIGINT);
      61    ASSERT (str);
      62    ASSERT (*str);
      63    ASSERT_DESCRIPTION (str, "Interrupt");
      64  #endif
      65  
      66    /* Test that for out-of-range signal numbers the result is usable.  */
      67  
      68    str = strsignal (-1);
      69    ASSERT (str);
      70    ASSERT (str != (char *) -1);
      71    ASSERT (strlen (str));
      72  
      73    str = strsignal (9249234);
      74    ASSERT (str);
      75    ASSERT (str != (char *) -1);
      76    ASSERT (strlen (str));
      77  
      78    return 0;
      79  }