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Command: unlockpt | Section: 3 | Source: NetBSD | File: unlockpt.3
UNLOCKPT(3) FreeBSD Library Functions Manual UNLOCKPT(3)
NAME
unlockpt - unlock the slave pseudo-terminal device
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <stdlib.h>
int
unlockpt(int fildes);
DESCRIPTION
The unlockpt() unlocks access to the pseudo-terminal device corresponding
to the master pseudo-terminal device associated with fildes. Conforming
applications must call this function before opening the slave pseudo-
terminal device.
RETURN VALUES
If successful, unlockpt() returns 0; otherwise a value of -1 is returned
and errno is set to indicate the error.
ERRORS
The unlockpt() function will fail if:
[EACCESS] the corresponding pseudo-terminal device could not be
accessed.
[EBADF] fildes is not a valid descriptor.
[EINVAL] fildes is not associated with a master pseudo-terminal
device.
NOTES
In NetBSD unlockpt() does nothing.
SEE ALSO
ioctl(2), grantpt(3), posix_openpt(3), ptsname(3)
STANDARDS
The unlockpt() function conforms to IEEE Std 1003.1-2001 ("POSIX.1").
Its first release was in X/Open Portability Guide Issue 4, Version 2
("XPG4.2").
FreeBSD 14.1-RELEASE-p8 May 25, 2004 FreeBSD 14.1-RELEASE-p8