int closedir(DIR *dirp);
The closedir() function closes the directory stream associated with
dirp. A successful call to closedir() also closes the underlying file
descriptor associated with dirp. The directory stream descriptor dirp
is not available after this call.
The closedir() function returns 0 on success. On error, -1 is
returned, and errno is set appropriately.
EBADF Invalid directory stream descriptor dirp.
SVr4, POSIX.1-2001, 4.3BSD.
close(2), opendir(3), readdir(3), rewinddir(3), scandir(3), seekdir(3),
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