[ Bottom of Page | Previous Page | Next Page | Contents | Index | Library Home | Legal | Search ]

Technical Reference: Base Operating System and Extensions, Volume 2

unlockpt Subroutine

Purpose

Unlocks a pseudo-terminal device.

Library

Standard C Library (libc.a)

Syntax

#include <stdlib.h>


int unlockpt ( FileDescriptor)
int FileDescriptor;

Description

The unlockpt subroutine unlocks the slave peudo-terminal device associated with the master peudo-terminal device defined by the FileDescriptor parameter. This subroutine has no effect if the environment variable XPG_SUS_ENV is not set equal to the string "ON", or if the BSD PTY driver is used.

Parameters

FileDescriptor Specifies the file descriptor of the master pseudo-terminal device.

Return Values

Upon successful completion, a value of 0 is returned. Otherwise, a value of -1 is returned and the errno global variable is set to indicate the error.

Related Information

The grantpt subroutine.

The Input and Output Handling Programmer's Overview in AIX 5L Version 5.2 General Programming Concepts: Writing and Debugging Programs.

[ Top of Page | Previous Page | Next Page | Contents | Index | Library Home | Legal | Search ]