int rmdir(const char *pathname);
rmdir() deletes a directory, which must be empty.
On success, zero is returned. On error, -1 is returned, and errno is
EACCES Write access to the directory containing pathname was not
allowed, or one of the directories in the path prefix of path-
name did not allow search permission. (See also path_resolu-
EBUSY pathname is currently in use by the system or some process that
prevents its removal. On Linux this means pathname is currently
used as a mount point or is the root directory of the calling
EFAULT pathname points outside your accessible address space.
EINVAL pathname has . as last component.
ELOOP Too many symbolic links were encountered in resolving pathname.
pathname was too long.
ENOENT A directory component in pathname does not exist or is a dan-
gling symbolic link.
ENOMEM Insufficient kernel memory was available.
pathname, or a component used as a directory in pathname, is
not, in fact, a directory.
pathname contains entries other than . and .. ; or, pathname has
.. as its final component. POSIX.1 also allows EEXIST for this
EPERM The directory containing pathname has the sticky bit (S_ISVTX)
set and the process's effective user ID is neither the user ID
of the file to be deleted nor that of the directory containing
it, and the process is not privileged (Linux: does not have the
EPERM The filesystem containing pathname does not support the removal
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Linux 2015-08-08 RMDIR(2)
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