UNLOCKPT

Section: Linux Programmer's Manual (3)
Updated: 2003-01-30
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NAME

unlockpt - unlock a pseudo-terminal master/slave pair  

SYNOPSIS

#define _XOPEN_SOURCE

#include <stdlib.h> int unlockpt(int fd);
 

DESCRIPTION

The unlockpt() function unlocks the slave pseudo-terminal device (pty) corresponding to the master pty referred to by fd.

unlockpt() should be called before opening the slave side of a pty.  

RETURN VALUE

When successful, unlockpt() returns 0. Otherwise, it returns -1 and sets errno appropriately.  

ERRORS

EBADF
The fd argument is not a file descriptor open for writing.
EINVAL
The fd argument is not associated with a master pty.
 

CONFORMING TO

POSIX.1-2001.  

SEE ALSO

grantpt(3), posix_openpt(3), ptsname(3), pts(4), pty(7)


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
CONFORMING TO
SEE ALSO

linux.jgfs.net manual pages