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

#include <termios.h>
#include <sys/ioctl.h>
#include "libc.h"
#include "syscall.h"
int tcdrain(int fd)
{
	return syscall_cp(SYS_ioctl, fd, TCSBRK, 1);
}