/* Copyright (C) 1992-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library 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

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <errno.h>

#include <string.h>

#include <unistd.h>

#include <sys/utsname.h>

/* Put the name of the current host in no more than LEN bytes of NAME.

   The result is null-terminated if LEN is large enough for the full

   name and the terminator.  */

int

__gethostname (char *name, size_t len)

{

  struct utsname buf;

  size_t node_len;

  if (__uname (&buf))

    return -1;

  node_len = strlen (buf.nodename) + 1;

  memcpy (name, buf.nodename, len < node_len ? len : node_len);

  if (node_len > len)

    {

      __set_errno (ENAMETOOLONG);

      return -1;

    }

  return 0;

}

weak_alias (__gethostname, gethostname)