Subversion Repositories openrisc_2011-10-31

/*

 *  write() - POSIX 1003.1b 6.4.2 - Write to a File

 *

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

 */

#include "libio_.h"

/*

 * write

 *

 * This routine writes count bytes from from buffer pointed to by buffer

 * to the file associated with the open file descriptor, fildes.

 */

ssize_t write(

  int         fd,

  const void *buffer,

  size_t      count

)

{

  rtems_status_code  rc;

  rtems_libio_t     *iop;

  rtems_libio_check_fd( fd );

  iop = rtems_libio_iop( fd );

  rtems_libio_check_is_open(iop);

  rtems_libio_check_buffer( buffer );

  rtems_libio_check_count( count );

  rtems_libio_check_permissions( iop, LIBIO_FLAGS_WRITE );

  /*

   *  Now process the write() request.

   */

  if ( !iop->handlers->write )

    set_errno_and_return_minus_one( ENOTSUP );

  rc = (*iop->handlers->write)( iop, buffer, count );

  if ( rc > 0 )

    iop->offset += rc;

  return rc;

}

/*

 *  _write_r

 *

 *  This is the Newlib dependent reentrant version of write().

 */

#if defined(RTEMS_NEWLIB)

#include <reent.h>

long _write_r(

  struct _reent *ptr,

  int            fd,

  const void    *buf,

  size_t         nbytes

)

{

  return write( fd, buf, nbytes );

}

#endif