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Linux 2.6 - man page for unlockpt (linux section 3posix)

UNLOCKPT(P)			    POSIX Programmer's Manual			      UNLOCKPT(P)

NAME
       unlockpt - unlock a pseudo-terminal master/slave pair

SYNOPSIS
       #include <stdlib.h>

       int unlockpt(int fildes);

DESCRIPTION
       The  unlockpt() function shall unlock the slave pseudo-terminal device associated with the
       master to which fildes refers.

       Conforming applications shall ensure that they call unlockpt() before  opening  the  slave
       side of a pseudo-terminal device.

RETURN VALUE
       Upon  successful  completion, unlockpt() shall return 0. Otherwise, it shall return -1 and
       set errno to indicate the error.

ERRORS
       The unlockpt() function may fail if:

       EBADF  The fildes argument is not a file descriptor open for writing.

       EINVAL The fildes argument is not associated with a master pseudo-terminal device.

       The following sections are informative.

EXAMPLES
       None.

APPLICATION USAGE
       None.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       grantpt() , open() , ptsname() , the  Base  Definitions	volume	of  IEEE Std 1003.1-2001,
       <stdlib.h>

COPYRIGHT
       Portions  of  this  text  are  reprinted  and  reproduced in electronic form from IEEE Std
       1003.1, 2003 Edition, Standard for Information Technology  --  Portable	Operating  System
       Interface  (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by
       the Institute of Electrical and Electronics Engineers, Inc and  The  Open  Group.  In  the
       event  of  any  discrepancy  between this version and the original IEEE and The Open Group
       Standard, the original IEEE and The Open Group Standard is the referee document. The orig-
       inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group			       2003				      UNLOCKPT(P)


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