Linux Standard Base PDA Specification 3.0RC3
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ttyio

Name

ttyio -- tty ioctl commands

Synopsis

#include <fcntl.h>

int ioctl(int fd, unsigned long request, int * argp);

Description

Tty ioctl commands are a subset of the ioctl() calls, which can perform a variety of functions on tty devices. fd shall be an open file descriptor referring to a terminal device.

The following ioctl()s are provided:

TIOCGWINSZ 

Get the size attributes of the tty. argp is a pointer to a winsize structure.

Return Value

On success, 0 is returned. On error, -1 is returned and the global variable errno is set appropriately.

Errors

EBADF 

fd is not a valid descriptor.

EFAULT 

argp references an inaccessible memory area.

EINVAL 

request and argp are not valid.

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