uio.h\sys\include - musl - musl - an implementation of the standard library for Linux-based systems

#ifndef _SYS_UIO_H
#define _SYS_UIO_H
#define __NEED_size_t
#define __NEED_ssize_t
#define __NEED_struct_iovec
#include <bits/alltypes.h>
ssize_t readv (int, const struct iovec *, int);
ssize_t writev (int, const struct iovec *, int);
#endif