Content-type: text/html Man page of unlockpt

unlockpt

Section: C Library Functions (3)
Index Return to Main Contents
 

NAME

unlockpt - Unlocks a pseudoterminal master and slave pair  

LIBRARY

Standard C Library (libc.so, libc.a)  

SYNOPSIS

#include <stdlib.h>

int unlockpt(        int mastfd);
 

STANDARDS

Interfaces documented on this reference page conform to industry standards as follows:

unlockpt():  XPG4-UNIX

Refer to the standards(5) reference page for more information about industry standards and associated tags.  

PARAMETERS

Specifies a file descriptor that is returned from a successful open of the master pseudoterminal device.  

DESCRIPTION

The unlockpt() function unlocks a slave pseudoterminal from its associated master counterpart. It does this by clearing a lock flag so that the slave device can be opened.  

RETURN VALUE

Upon successful completion, the unlockpt() function returns a value of 0. Otherwise, it returns a value of -1 and sets errno to indicate the error.  

ERRORS

The unlockpt() function sets errno to the specified values for the following conditions:

The file descriptor specified by the mastfd parameter is not an open file descriptor. The file descriptor specified by the mastfd parameter is not associated with a master pseudoterminal device.  

RELATED INFORMATION

Functions: openpty(3)

Standards: standards(5)

Guides: System V Compatibility User's Guide delim off


 

Index

NAME
LIBRARY
SYNOPSIS
STANDARDS
PARAMETERS
DESCRIPTION
RETURN VALUE
ERRORS
RELATED INFORMATION

This document was created by man2html, using the manual pages.
Time: 02:41:09 GMT, October 02, 2010