Subversion Repositories openrisc_2011-10-31

/*

 *  This file emulates the old Classic RTEMS IO manager directives

 *  which register and lookup names using the in-memory filesystem.

 *

 *  COPYRIGHT (c) 1989-1999.

 *  On-Line Applications Research Corporation (OAR).

 *

 *  The license and distribution terms for this file may be

 *  found in the file LICENSE in this distribution or at

 *  http://www.OARcorp.com/rtems/license.html.

 *

 *  $Id: ioman.c,v 1.2 2001-09-27 12:01:15 chris Exp $

 */

#include <sys/types.h>

#include <sys/stat.h>

#include <fcntl.h>

#include <unistd.h>

#include <assert.h>

#include <rtems.h>

#include "libio_.h"

#include "imfs.h"

#if defined(__linux__)

#define S_IFCHR __S_IFCHR

#endif

/*

 *  rtems_io_register_name

 *

 *  This assumes that all registered devices are character devices.

 */

rtems_status_code rtems_io_register_name(

  char *device_name,

  rtems_device_major_number major,

  rtems_device_minor_number minor

)

{

#if !defined(RTEMS_UNIX)

  int    status;

  dev_t  dev;

  dev = rtems_filesystem_make_dev_t( major, minor );

  status = mknod( device_name, 0777 | S_IFCHR, dev );

  /* this is the only error returned by the old version */

  if ( status )

    return RTEMS_TOO_MANY;

#endif

  return RTEMS_SUCCESSFUL;

}

/*

 *  rtems_io_lookup_name

 *

 *  This version is not reentrant.

 *

 *  XXX - This is dependent upon IMFS and should not be.

 *        Suggest adding a filesystem routine to fill in the device_info.

 */

rtems_status_code rtems_io_lookup_name(

  const char           *name,

  rtems_driver_name_t **device_info

)

{

#if !defined(RTEMS_UNIX)

  IMFS_jnode_t                      *the_jnode;

  rtems_filesystem_location_info_t   loc;

  static rtems_driver_name_t         device;

  int                                result;

  rtems_filesystem_node_types_t      node_type;

  result = rtems_filesystem_evaluate_path( name, 0x00, &loc, TRUE );

  the_jnode = loc.node_access;

  node_type = (*loc.ops->node_type)( &loc );

  if ( (result != 0) || node_type != RTEMS_FILESYSTEM_DEVICE ) {

    *device_info = 0;

    rtems_filesystem_freenode( &loc );

    return RTEMS_UNSATISFIED;

  }

  device.device_name        = (char *) name;

  device.device_name_length = strlen( name );

  device.major              = the_jnode->info.device.major;

  device.minor              = the_jnode->info.device.minor;

  *device_info              = &device;

  rtems_filesystem_freenode( &loc );

#endif

  return RTEMS_SUCCESSFUL;

}