The following functions are defined, corresponding to system calls:

__chdir
__fchdir
__open
__xstat (Linux)
__lxstat (Linux)
__xmknod (Linux)
__execve
__access
__acct
__chmod
__chown
__link
__unlink
__symlink
__readlink
__rename
__mkdir
__rmdir
__utime

__opendir
__readdir
__closedir
__rewinddir
__telldir
__seekdir
