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UNLOCKPT 3C "Aug 14, 2002"
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.
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