ioctl.h File Reference

Input/Output ConTroL (IOCTL) functions. More...

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Functions
int	ioctl (int fd, unsigned long int request, void *data)
	Perform the I/O control operation specified by REQUEST on FD. One argument may follow; its presence and type depend on REQUEST. More...

Detailed Description

Input/Output ConTroL (IOCTL) functions.

Copyright

(c) 2014-2024 This file is distributed under the MIT License. See LICENSE.md for details.

Function Documentation

ioctl()

int ioctl	(	int	fd,
		unsigned long int	request,
		void *	data
	)

Perform the I/O control operation specified by REQUEST on FD. One argument may follow; its presence and type depend on REQUEST.

Parameters

fd	Must be an open file descriptor.
request	The device-dependent request code
data	An untyped pointer to memory.

Returns

Return value depends on REQUEST. Usually -1 indicates error.