UNLOCKPT(3) BSD 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. Con-
forming 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'').
BSD
May 25, 2004 BSD
