#include <u.h>#include <libc.h>#include <draw.h>#include <event.h>#include "cons.h" #define	BUFSIZ	4000 extern int	outfd; int	hostpid; voidedie(void){	static int dead = 0; 	if(dead++ > 0) return;	close(outfd);	postnote(PNGROUP, getpid(), "exit");} static intstart_host(void){	int	fd; 	cs = consctl(); 	switch((hostpid = rfork(RFPROC|RFNAMEG|RFFDG|RFNOTEG))) {	case 0:		fd = open("/dev/cons", OREAD);		dup(fd,0);		if(fd != 0)			close(fd);		fd = open("/dev/cons", OWRITE);		dup(fd,1);		dup(fd,2);		if(fd != 1 && fd !=2)			close(fd);		execl("/bin/rc","rcX",nil);		fprint(2,"failed to start up rc\n");		_exits("rc");	case -1:		fprint(2,"rc startup: fork error\n");		_exits("rc_fork");	} 	return open("/mnt/cons/cons/data", ORDWR);} voidebegin(int Ehost){ 	atexit(edie); 	einit(Emouse|Ekeyboard); 	outfd = start_host();	if( estart(Ehost, outfd, BUFSIZ) != Ehost) {		exits("event init error");	}} voidsend_interrupt(void){	postnote(PNGROUP, hostpid,"interrupt");}