unlockpt(3C)

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUES | ERRORS | ATTRIBUTES | SEE ALSO

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
MT-Level	Safe

SEE ALSO

open(2), grantpt(3C), ptsname(3C), attributes(5)

STREAMS Programming Guide

SunOS 5.8  Last Revised 29 Dec 1996

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUES | ERRORS | ATTRIBUTES | SEE ALSO