The closedir()
function closes the directory stream referred to by the argument dirp. Upon return, the value of dirp may no longer point to an accessible object of the type DIR. If a file descriptor is used to implement type DIR, that
file descriptor will be closed.
RETURN VALUES
Upon successful completion, closedir() returns 0. Otherwise, -1 is returned and errno is set to indicate the error.
ERRORS
The closedir() function may fail if:
EBADF
The dirp argument does not refer to an open directory stream.
EINTR
The closedir() function was interrupted by a signal.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes: