harvey/sys/src/libc/port/hangup.c

#include <u.h>
#include <libc.h>
#include <ctype.h>

/*
 *  force a connection to hangup
 */
int
hangup(int ctl)
{
	return write(ctl, "hangup", sizeof("hangup")-1) != sizeof("hangup")-1;
}