glibc/sysdeps/generic/uname.c

/* Copyright (C) 1991, 1992, 1996, 1997 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., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

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

/* This file is created by the configuration process, and defines UNAME_*.  */
#include <config-name.h>

/* Put information about the system in NAME.  */
int
uname (name)
     struct utsname *name;
{
  int save;

  if (name == NULL)
    {
      __set_errno (EINVAL);
      return -1;
    }

  save = errno;
  if (__gethostname (name->nodename, sizeof (name->nodename)) < 0)
    {
      if (errno == ENOSYS)
	{
	  /* Hostname is meaningless for this machine.  */
	  name->nodename[0] = '\0';
	  __set_errno (save);
	}
#ifdef	ENAMETOOLONG
      else if (errno == ENAMETOOLONG)
	/* The name was truncated.  */
	__set_errno (save);
#endif
      else
	return -1;
    }
  strncpy (name->sysname, UNAME_SYSNAME, sizeof (name->sysname));
  strncpy (name->release, UNAME_RELEASE, sizeof (name->release));
  strncpy (name->version, UNAME_VERSION, sizeof (name->version));
  strncpy (name->machine, UNAME_MACHINE, sizeof (name->machine));

  return 0;
}