Low Level I/O
[C Runtime Library.]

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Detailed Description

Low level input and output operations.

 #include <io.h> 

Standard C runtime file interface to Nut/OS devices.

Defines
#define	_O_APPEND   0x0008
#define	_O_BINARY   0x8000
#define	_O_CREAT   0x0100
#define	_O_EXCL   0x0400
#define	_O_RDONLY   0x0000
#define	_O_RDWR   0x0002
#define	_O_TEXT   0x4000
#define	_O_TRUNC   0x0200
#define	_O_WRONLY   0x0001
#define	IOCTL_FLUSHOUTBUF   0x0009
	Flush the output buffer.
#define	IOCTL_GETBUFFERMODE   0x0004
#define	IOCTL_GETFILESIZE   0x000A
	Return the number of bytes currently available in the input buffer.
#define	IOCTL_GETINBUFCOUNT   0x000C
	Return the number of bytes currently available in the output buffer.
#define	IOCTL_GETINBUFSIZE   0x0007
#define	IOCTL_GETOUTBUFCOUNT   0x000B
	Return the number of bytes currently available in the input buffer.
#define	IOCTL_GETOUTBUFSIZE   0x0005
#define	IOCTL_GETSTATUS   0x0001
#define	IOCTL_SETBUFFERMODE   0x0003
#define	IOCTL_SETINBUFSIZE   0x0008
#define	IOCTL_SETOUTBUFSIZE   0x0006
#define	IOCTL_SETSTATUS   0x0002

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Define Documentation

#define _O_APPEND   0x0008

Start writing at the end.

#define _O_BINARY   0x8000

Raw mode.

#define _O_CREAT   0x0100

Create file if it does not exist.

#define _O_EXCL   0x0400

Open only if it does not exist.

#define _O_RDONLY   0x0000

Read only.

#define _O_RDWR   0x0002

Read and write.

#define _O_TEXT   0x4000

EOL translation.

#define _O_TRUNC   0x0200

Truncate file if it exists.

#define _O_WRONLY   0x0001

Write only.

#define IOCTL_FLUSHOUTBUF   0x0009

Flush the output buffer.

Currently not provided by any known device.

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