#include "Devtab.hxx"
#include <cstdarg>
#include <fcntl.h>
#include <reent.h>
#include <unistd.h>
#include <sys/select.h>

Functions
int	_open_r (struct _reent reent, const char path, int flags, int mode)
	Open a file or device.

int	_close_r (struct _reent *reent, int fd)
	Close a file or device.

ssize_t	_read_r (struct _reent reent, int fd, void buf, size_t count)
	Read from a file or device.

ssize_t	_write_r (struct _reent reent, int fd, const void buf, size_t count)
	Write to a file or device.

int	_stat_r (struct _reent reent, const char path, struct stat *stat)
	Get the status information of a file or device.

int	_fstat_r (struct _reent reent, int fd, struct stat stat)
	Get the status information of a file or device.

int	_isatty_r (struct _reent *reent, int fd)
	Get the tty information of a file or device.

int	_unlink_r (struct _reent reent, const char path)
	remove a file.

_off_t	_lseek_r (struct _reent *reent, int fd, _off_t offset, int whence)
	Change the offset index of a file or device.

int	fsync (int fd)
	Synchronize (flush) a file to disk.

int	ioctl (int fd, unsigned long int key,...)
	Request and ioctl transaction.

int	select (int nfds, fd_set readfds, fd_set writefds, fd_set exceptfds, struct timeval timeout)
	POSIX select().

int	fcntl (int fd, int cmd,...)
	Manipulate a file descriptor.

Detailed Description

Copyright: Copyright (c) 2012, Stuart W Baker All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

This file implements the generic fileio.

Author: Stuart W. Baker

Date: 27 December 2012

Definition in file Fileio.cxx.

Function Documentation

◆ _close_r()

int _close_r	(	struct _reent *	reent,
		int	fd
	)

Close a file or device.

Parameters

reent	thread safe reentrant structure
fd	file descriptor to close

Returns: 0 upon success, -1 upon failure with errno containing the cause

Definition at line 347 of file Fileio.cxx.

◆ _fstat_r()

int _fstat_r	(	struct _reent *	reent,
		int	fd,
		struct stat *	stat
	)

Get the status information of a file or device.

Parameters

reent	thread safe reentrant structure
fd	file descriptor to get status of
stat	structure to fill status info into

Returns: 0 upon success, -1 upon failure with errno containing the cause

Definition at line 400 of file Fileio.cxx.

◆ _isatty_r()

int _isatty_r	(	struct _reent *	reent,
		int	fd
	)

Get the tty information of a file or device.

Parameters

reent	thread safe reentrant structure
fd	file descriptor determine if it is a tty

Returns: 1 if a tty, else 0

Definition at line 410 of file Fileio.cxx.

◆ _lseek_r()

_off_t _lseek_r	(	struct _reent *	reent,
		int	fd,
		_off_t	offset,
		int	whence
	)

Change the offset index of a file or device.

Parameters

reent	thread safe reentrant structure
fd	file descriptor to seek
offset	offset within file
whence	type of seek to complete

Returns: resulting offset from beginning of file, -1 upon failure with errno containing the cause

Definition at line 432 of file Fileio.cxx.

◆ _open_r()

int _open_r	(	struct _reent *	reent,
		const char *	path,
		int	flags,
		int	mode
	)

Open a file or device.

Parameters

reent	thread safe reentrant structure
path	file or device name
flags	open flags
mode	open mode, ignored in this implementation

Returns: 0 upon success, -1 upon failure with errno containing the cause

Definition at line 331 of file Fileio.cxx.

◆ _read_r()

ssize_t _read_r	(	struct _reent *	reent,
		int	fd,
		void *	buf,
		size_t	count
	)

Read from a file or device.

Parameters

reent	thread safe reentrant structure
fd	file descriptor to read
buf	location to place read data
count	number of bytes to read

Returns: number of bytes read upon success, -1 upon failure with errno containing the cause

Definition at line 360 of file Fileio.cxx.

◆ _stat_r()

int _stat_r	(	struct _reent *	reent,
		const char *	path,
		struct stat *	stat
	)

Get the status information of a file or device.

Parameters

reent	thread safe reentrant structure
path	file or device name
stat	structure to fill status info into

Returns: 0 upon success, -1 upon failure with errno containing the cause

Definition at line 383 of file Fileio.cxx.

◆ _unlink_r()

int _unlink_r	(	struct _reent *	reent,
		const char *	path
	)

remove a file.

Parameters

reent	thread safe reentrant structure
path	file name

Returns: 0 upon success, -1 upon failure with errno containing the cause

Definition at line 420 of file Fileio.cxx.

◆ _write_r()

ssize_t _write_r	(	struct _reent *	reent,
		int	fd,
		const void *	buf,
		size_t	count
	)

Write to a file or device.

Parameters

reent	thread safe reentrant structure
fd	file descriptor to write
buf	location to find write data
count	number of bytes to write

Returns: number of bytes written upon success, -1 upon failure with errno containing the cause

Definition at line 372 of file Fileio.cxx.

◆ fcntl()

int fcntl	(	int	fd,
		int	cmd,
			...
	)

Manipulate a file descriptor.

Parameters

fd	file descriptor
cmd	operation to perform
...	parameter to the cmd operation

Returns: dependent on the operation (POSIX compliant where applicable) or -1 on error with errno set appropriately

Definition at line 494 of file Fileio.cxx.

◆ fsync()

int fsync ( int fd )

Synchronize (flush) a file to disk.

Parameters

fd	file descriptor to synch

Returns: 0 upon success, -1 upon failure with errno containing the cause

Definition at line 441 of file Fileio.cxx.

◆ ioctl()

int ioctl	(	int	fd,
		unsigned long int	key,
			...
	)

Request and ioctl transaction.

Parameters

fd	file descriptor
key	ioctl key
...	key data

Returns: 0 upon success, -1 upon failure with errno containing the cause

Definition at line 452 of file Fileio.cxx.

◆ select()

int select	(	int	nfds,
		fd_set *	readfds,
		fd_set *	writefds,
		fd_set *	exceptfds,
		struct timeval *	timeout
	)

POSIX select().

Parameters

nfds	highest numbered file descriptor in any of the three, sets plus 1
readfds	fd_set of file descritpors to pend on read active
writefds	fd_set of file descritpors to pend on write active
exceptfds	fd_set of file descritpors to pend on error active
timeout	timeout value to wait, if 0, return immediately, if NULL wait forever

Returns: on success, number of file descriptors in the three sets that are active, 0 on timeout, -1 with errno set appropriately upon error.

Definition at line 473 of file Fileio.cxx.

Functions

Detailed Description

Function Documentation

◆ _close_r()

◆ _fstat_r()

◆ _isatty_r()

◆ _lseek_r()

◆ _open_r()

◆ _read_r()

◆ _stat_r()

◆ _unlink_r()

◆ _write_r()

◆ fcntl()

◆ fsync()

◆ ioctl()

◆ select()