/* Print a message describing error code.

   Copyright (C) 2008-2020 Free Software Foundation, Inc.

   Written by Bruno Haible and Simon Josefsson.

   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 of the License, 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/>.  */

#include <config.h>

/* Specification.  */

#include <stdio.h>

#include <errno.h>

#include <stdlib.h>

#include <string.h>

#include "strerror-override.h"

/* Use the system functions, not the gnulib overrides in this file.  */

#undef fprintf

void

perror (const char *string)

{

  char stackbuf[STACKBUF_LEN];

  int ret;

  /* Our implementation guarantees that this will be a non-empty

     string, even if it returns EINVAL; and stackbuf should be sized

     large enough to avoid ERANGE.  */

  ret = strerror_r (errno, stackbuf, sizeof stackbuf);

  if (ret == ERANGE)

    abort ();

  if (string != NULL && *string != '\0')

    fprintf (stderr, "%s: %s\n", string, stackbuf);

  else

    fprintf (stderr, "%s\n", stackbuf);

}