unlockpt

UNLOCKPT(3)		  Linux Programmer’s Manual		  UNLOCKPT(3)



NAME
       unlockpt - unlock a pseudotty master/slave pair

SYNOPSIS
       #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 1003.1-2001.

SEE ALSO
       grantpt(3), ptsname(3)



PTY Control			  2003-01-30			  UNLOCKPT(3)