tee.c\linux\src - musl - musl - an implementation of the standard library for Linux-based systems

#define _GNU_SOURCE
#include <fcntl.h>
#include "syscall.h"
ssize_t tee(int src, int dest, size_t len, unsigned flags)
{
	return syscall(SYS_tee, src, dest, len, flags);
}