openpty()

Find an available pseudo-tty

Synopsis:

#include <unix.h>

int openpty( int* amaster, 
             int* aslave,
             char* name,
             struct termios* termp,
             struct winsize* winp );

Arguments:

amaster

A pointer to a location where openpty() can store the file descriptor of the master side of the pseudo-tty.

aslave

A pointer to a location where openpty() can store the file descriptor of the slave side of the pseudo-tty.

name

NULL, or a pointer to a buffer where openpty() can store the filename of the slave side of the pseudo-tty.

termp

NULL, or a pointer to a termios structure that describes the terminal's control attributes to apply to the slave side of the pseudo-tty.

winp

A pointer to a winsize structure that defines the window size to use for the slave side of the pseudo-tty.

Library:

libc

Use the -l c option to qcc to link against this library. This library is usually included automatically.

---

This function is in libc.a, but not in libc.so (in order to save space).

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Description:

The openpty() function finds and opens an available pseudo-tty.

Returns:

0

Success.

-1

An error occurred (errno is set).

Errors:

ENOENT

There are no ttys available.

Classification:

Unix

See also:

fork(), forkpty(), login_tty(), termios