/* Test of strsignal() function.
   Copyright (C) 2008-2023 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, either version 3, or (at your option)
   any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, see <https://www.gnu.org/licenses/>.  */

/* Written by Colin Watson <cjwatson@debian.org>, 2008.  */

#include <config.h>

#include <string.h>

#include "signature.h"
SIGNATURE_CHECK (strsignal, char *, (int));

#include <signal.h>

#include "macros.h"

#if HAVE_DECL_SYS_SIGLIST
# define ASSERT_DESCRIPTION(actual, expected)
#else
/* In this case, we can guarantee some signal descriptions.
   But allow the actual result to be longer than the expected result.  */
# define ASSERT_DESCRIPTION(actual, expected) \
   ASSERT (strncmp (actual, expected, strlen (expected)) == 0)
#endif

int
main (void)
{
  /* Work around bug in cygwin 1.5.25 <string.h> by declaring str as
     const char *, even though strsignal is supposed to return char *.
     At any rate, this doesn't hurt, since POSIX 200x states that "The
     string pointed to shall not be modified by the application."  */
  const char *str;

  /* We try a couple of signals, since not all signals are supported
     everywhere.  Notwithstanding the #ifdef for neatness, SIGINT should in
     fact be available on all platforms.  */

#ifdef SIGHUP
  str = strsignal (SIGHUP);
  ASSERT (str);
  ASSERT (*str);
  ASSERT_DESCRIPTION (str, "Hangup");
#endif

#ifdef SIGINT
  str = strsignal (SIGINT);
  ASSERT (str);
  ASSERT (*str);
  ASSERT_DESCRIPTION (str, "Interrupt");
#endif

  /* Test that for out-of-range signal numbers the result is usable.  */

  str = strsignal (-1);
  ASSERT (str);
  ASSERT (str != (char *) -1);
  ASSERT (strlen (str));

  str = strsignal (9249234);
  ASSERT (str);
  ASSERT (str != (char *) -1);
  ASSERT (strlen (str));

  return 0;
}