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

#include <termios.h>
#include <sys/ioctl.h>
int tcsendbreak(int fd, int dur)
{
	/* nonzero duration is implementation-defined, so ignore it */
	return ioctl(fd, TCSBRK, 0);
}