#include <u.h>#include <libc.h>#include <libg.h>#include <frame.h>#include "dat.h"#include "fns.h" int	mouseslave;int	kbdslave;int	cfd;		/* client end of pipe */int	sfd;		/* service end of pipe */int	clockfd;	/* /dev/time */int	timefd;		/* /dev/cputime */int	kbdc;Proc	*pmouse;Proc	*pkbd;Rune	genbuf[4096];Bitmap	*lightgrey;Bitmap	*darkgrey;Proc	*wakemouse;  int	mkslave(char*, int, int);void	killslaves(void);void	kbdctl(void);void	mousectl(void); voidmain(int argc, char *argv[]){	char *fn;	int fd, p[2];	Dir d;	Rectangle r;  	if(access("/mnt/help/new", 0) == 0){		fprint(2, "help: already running\n");		exits("running");	}	fn = 0;	ARGBEGIN{	case 'f':		fn = ARGF();		break;	}ARGEND 	binit(error, fn, "help");	if(fn){		fd = create("/env/font", 1, 0664);		if(fd >= 0){			write(fd, fn, strlen(fn));			close(fd);		}	}	textureinit();	dirfstat(bitbltfd, &d);	r = screen.r;	if(d.type != 'b')		r = inset(r, 4);	bitblt(&screen, r.min, &screen, r, 0);	bflush(); 	/*	 * File server	 */	if((clockfd=open("/dev/time", OREAD)) < 0)		error("/dev/time");	if((timefd=open("/dev/cputime", OREAD)) < 0)		error("/dev/cputime");	if((fd=open("/dev/user", OREAD)) < 0)		error("/dev/user");	read(fd, user, NAMELEN-1);	close(fd);	if(pipe(p) < 0)		error("pipe");	cfd = p[0];	sfd = p[1]; 	/*	 * Slaves	 */	mouseslave = mkslave("/dev/mouse", sizeof(mouse.data), 0);	kbdslave = mkslave("/dev/cons", 1, 1);	atexit(killslaves); 	/*	 * Do something	 */	rootpage = newpage(0, 0);	rootpage->visible = 1;	rootpage->r = inset(screen.r, 3);	pagedraw(rootpage, inset(screen.r, 3), 1);	textinsert(&rootpage->tag, L"\thelp/Boot\tExit", 0, 0, 1);	pagesplit(rootpage, 0);	pageadd(rootpage, 0);	pagesplit(rootpage->down, 1);	pagesplit(rootpage->down->next, 1);/**/ 	/*	 * Start processes	 */	run(newproc(control, 0));	pkbd = newproc(kbdctl, 0);	pmouse = newproc(mousectl, 0);	proc.p = pmouse;	longjmp(pmouse->label, 1);} intmkslave(char *file, int count, int raw){	int fd1, fd2, fd3, n, pid;	char buf[64]; 	fd1 = open(file, OREAD);	if(fd1 < 0)		error(file);	switch(pid = rfork(RFENVG|RFNAMEG|RFNOTEG|RFFDG|RFPROC|RFNOWAIT)){	case 0:		close(sfd);		close(clockfd);		close(timefd);		bclose();		if(raw){			fd3 = open("/dev/consctl", OWRITE);			if(fd3 < 0)				error("slave consctl open");			write(fd3, "rawon", 5);		}		if(mount(cfd, "/dev", MBEFORE, "slave", "") < 0)			error("slave mount");		close(cfd);		fd2 = open(file, OWRITE);		if(fd2 < 0)			error("slave open");		while((n=read(fd1, buf, count)) >= 0)			if(write(fd2, buf, n) != n)				error("slave write");		fprint(2, "%s slave shut down", file);		exits(0); 	case -1:		error("fork");	}	close(fd1);	return pid;} voidkillslaves(void){	char buf[32];	int fd; 	sprint(buf, "/proc/%d/note", mouseslave);	fd = open(buf, OWRITE);	if(fd > 0){		write(fd, "die", 3);		close(fd);	}	sprint(buf, "/proc/%d/note", kbdslave);	fd = open(buf, OWRITE);	if(fd > 0){		write(fd, "die", 3);		close(fd);	}} voidkbdctl(void){	static char buf[8];	static int nkbdc;	int n;	Rune r; 	for(;;){		clicktime = 0;		buf[nkbdc++] = kbdc;		if(fullrune(buf, nkbdc)){			n = chartorune(&r, buf);			type(r);			memmove(buf, buf+n, nkbdc-n);			nkbdc -= n;		}		sched();	}} voidmousectl(void){	static int i;	uchar *d = mouse.data; 	/*	 * Mouse is bootstrap process.  Just call sched to get things going.	 */ 	for(;;){		sched();		if(d[0] != 'm')			error("mouse not m");		if(d[1] & 0x80){			screen.r = bscreenrect(&screen.clipr);			pagedraw(rootpage, inset(screen.r, 3), 1);		}		mouse.buttons = d[1] & 7;		mouse.xy.x = BGLONG(d+2);		mouse.xy.y = BGLONG(d+6);		mouse.msec = BGLONG(d+10);		if(wakemouse){			run(wakemouse);			wakemouse->mouse = mouse;			wakemouse = 0;		}	}} voidfrgetmouse(void){	bflush();	wakemouse = proc.p;	sched();}