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Sebastian Huber
baef823cd5
Check iop reference count in close() and return -1 with errno set to EBUSY in case the file descriptor is still in use. Update #3132.
66 lines
1.2 KiB
C
66 lines
1.2 KiB
C
/**
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* @file
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*
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* @brief Read From a File
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* @ingroup libcsupport
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*/
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/*
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* COPYRIGHT (c) 1989-2011.
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* On-Line Applications Research Corporation (OAR).
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.org/license/LICENSE.
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*/
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#if HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <rtems/libio_.h>
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#include <rtems/seterr.h>
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/**
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* POSIX 1003.1b 6.4.1 - Read From a File
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*/
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ssize_t read(
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int fd,
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void *buffer,
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size_t count
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)
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{
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rtems_libio_t *iop;
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ssize_t n;
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rtems_libio_check_buffer( buffer );
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rtems_libio_check_count( count );
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LIBIO_GET_IOP_WITH_ACCESS( fd, iop, LIBIO_FLAGS_READ, EBADF );
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/*
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* Now process the read().
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*/
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n = (*iop->pathinfo.handlers->read_h)( iop, buffer, count );
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rtems_libio_iop_drop( iop );
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return n;
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}
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#if defined(RTEMS_NEWLIB) && !defined(HAVE__READ_R)
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#include <reent.h>
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/**
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* This is the Newlib dependent reentrant version of read().
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*/
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ssize_t _read_r(
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struct _reent *ptr RTEMS_UNUSED,
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int fd,
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void *buf,
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size_t nbytes
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)
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{
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return read( fd, buf, nbytes );
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}
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#endif
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