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SunOS 5.10 - man page for unlockpt (sunos section 3c)

unlockpt(3C)						   Standard C Library Functions 					      unlockpt(3C)

NAME
unlockpt - unlock a pseudo-terminal master/slave pair
SYNOPSIS
#include <stdlib.h> int unlockpt(int fildes);
DESCRIPTION
The unlockpt() function unlocks the slave pseudo-terminal device associated with the master to which fildes refers. Portable applications must call unlockpt() before opening the slave side of a pseudo-terminal device.
RETURN VALUES
Upon successful completion, unlockpt() returns 0. Otherwise, it returns -1 and sets 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.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ |MT-Level |Safe | +-----------------------------+-----------------------------+
SEE ALSO
open(2), grantpt(3C), ptsname(3C), attributes(5), standards(5) STREAMS Programming Guide SunOS 5.10 14 Aug 2002 unlockpt(3C)