glibc/sysdeps/generic/getdomain.c

/* Copyright (C) 1994, 1995 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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.

You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB.  If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA.  */

#include <errno.h>
#include <unistd.h>
#include <sys/utsname.h>
#include <string.h>

#if _UTSNAME_DOMAIN_LENGTH
/* The `uname' information includes the domain name.  */

/* Put the name of the current YP domain 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
getdomainname (char *name, size_t len)
{
  struct utsname u;

  if (uname (&u) < 0)
    return -1;

  strncpy (name, u.domainname, len);
  return 0;
}

#else
#include <sysdeps/stub/getdomain.c>
#endif