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/**
* @file
*
* @brief Read From a File
* @ingroup libcsupport
*/
/*
* COPYRIGHT (c) 1989-2011.
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/libio_.h>
#include <rtems/seterr.h>
/**
* POSIX 1003.1b 6.4.1 - Read From a File
*/
ssize_t read(
int fd,
void *buffer,
size_t count
)
{
rtems_libio_t *iop;
ssize_t n;
rtems_libio_check_buffer( buffer );
rtems_libio_check_count( count );
LIBIO_GET_IOP_WITH_ACCESS( fd, iop, LIBIO_FLAGS_READ, EBADF );
/*
* Now process the read().
*/
n = (*iop->pathinfo.handlers->read_h)( iop, buffer, count );
rtems_libio_iop_drop( iop );
return n;
}
#if defined(RTEMS_NEWLIB) && !defined(HAVE__READ_R)
#include <reent.h>
/**
* This is the Newlib dependent reentrant version of read().
*/
ssize_t _read_r(
struct _reent *ptr RTEMS_UNUSED,
int fd,
void *buf,
size_t nbytes
)
{
return read( fd, buf, nbytes );
}
#endif
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