Provided by: manpages-dev_3.54-1ubuntu1_all bug

NAME
       unlockpt - unlock a pseudoterminal master/slave pair


SYNOPSIS
       #define _XOPEN_SOURCE       /* See feature_test_macros(7) */
       #include <stdlib.h>

       int unlockpt(int fd);


DESCRIPTION
       The   unlockpt()   function   unlocks  the  slave  pseudoterminal  device  corresponding  to  the  master
       pseudoterminal referred to by fd.

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


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 pseudoterminal.


VERSIONS
       unlockpt() is provided in glibc since version 2.1.


CONFORMING TO
       POSIX.1-2001.


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


COLOPHON
       This page is part of release 3.54 of the Linux man-pages project.  A  description  of  the  project,  and
       information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.

                                                   2008-06-14                                        UNLOCKPT(3)