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/**
* @file
*
* @brief Truncate a File to the Specified Length
* @ingroup libcsupport
*/
/*
* 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.rtems.org/license/LICENSE.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <unistd.h>
#include <rtems/libio_.h>
int ftruncate( int fd, off_t length )
{
int rv = 0;
if ( length >= 0 ) {
rtems_libio_t *iop;
rtems_libio_check_fd( fd );
iop = rtems_libio_iop( fd );
rtems_libio_check_is_open( iop );
rtems_libio_check_permissions( iop, LIBIO_FLAGS_WRITE );
rv = (*iop->pathinfo.handlers->ftruncate_h)( iop, length );
} else {
errno = EINVAL;
rv = -1;
}
return rv;
}
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