XSI_STREAMS (_XOPEN_STREAMS)

XSI Streams option group. More...

Files
file	stropts.h
	XSI STREAMS interface (<stropts.h>)
file	ioctl.h
	POSIX device I/O control (<sys/ioctl.h>)

Macros
#define	FIONBIO   ZFD_IOCTL_FIONBIO
	Set or clear non-blocking I/O mode on a file descriptor.
#define	FIONREAD   ZFD_IOCTL_FIONREAD
	Return the number of bytes available to read without blocking.

Functions
int	ioctl (int fd, unsigned long request,...)
	Perform a device-specific control operation.

Detailed Description

XSI Streams option group.

Macro Definition Documentation

FIONBIO

#define FIONBIO   ZFD_IOCTL_FIONBIO

Set or clear non-blocking I/O mode on a file descriptor.

Definition at line 26 of file ioctl.h.

FIONREAD

#define FIONREAD   ZFD_IOCTL_FIONREAD

Return the number of bytes available to read without blocking.

Definition at line 28 of file ioctl.h.

Function Documentation

ioctl()

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

Perform a device-specific control operation.

Parameters

fd	File descriptor.
request	Implementation-defined request code.
...	Optional argument (typically a pointer or int) whose type is determined by request.

Returns

Request-specific return value on success, or -1 with errno set.

See also

https://pubs.opengroup.org/onlinepubs/9699919799/functions/ioctl.html