unlockpt(3C)unlockpt(3C)NAMEunlockpt - unlock a pseudo-terminal master/slave pair
SYNOPSIS
#include <stdlib.h>
int unlockpt(int fildes);
DESCRIPTION
The function unlockpt() clears a lock flag associated with the slave
pseudo-terminal device associated with its master pseudo-terminal
counterpart so that the slave pseudo-terminal device can be opened.
fildes is a file descriptor returned from a successful open of a master
pseudo-terminal device.
RETURN VALUE
Upon successful completion, the function unlockpt() returns 0; otherwise
it returns -1. A failure may occur if fildes is not an open file
descriptor or is not associated with a master pseudo-terminal device.
SEE ALSOopen(2), grantpt(3C), ptsname(3C)
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