glibc/sysdeps/nacl/gethostname.c

/* Get current host's name.  NaCl version.
   Copyright (C) 2015-2016 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>

/* 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)
{
  static const char hostname[] = "naclhost";

  int result = 0;
  size_t copy = sizeof hostname;

  if (len < copy)
    {
      errno = ENAMETOOLONG;
      result = -1;
      copy = len;
    }

  memcpy (name, hostname, copy);

  return result;
}
weak_alias (__gethostname, gethostname)