blob: 3bda204015e2ccf4fe3e29a096492ecbec423582 (
plain) (
tree)
|
|
/*
* write() - POSIX 1003.1b 6.4.2 - Write to a File
*
* COPYRIGHT (c) 1989-2007.
* 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.rtems.com/license/LICENSE.
*
* $Id$
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/libio_.h>
#include <rtems/seterr.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
)
{
ssize_t 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_h )
rtems_set_errno_and_return_minus_one( ENOTSUP );
rc = (*iop->handlers->write_h)( iop, buffer, count );
if ( rc > 0 )
iop->offset += rc;
return rc;
}
|