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UNLOCKPT (3) | C library functions | Unix Manual Pages | :man

NAME

unlockpt - unlock a pseudotty master/slave pair

CONTENTS

Synopsis
Description
Errors

SYNOPSIS



#include <stdlib.h>



"int unlockpt(int "fd");"

DESCRIPTION

The unlockpt() function unlocks the slave pseudo-terminal device (pty) corresponding to the master pty referred to by fd.

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

"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 pty.

"CONFORMING TO"

POSIX 1003.1-2001.

"SEE ALSO"

grantpt(3), ptsname(3)


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