#include <u.h>#include <libc.h>#include <draw.h>	/* for geometry */#include "dat.h"#include "fns.h" static int snarffd;static ulong snarfvers; #define MAXSNARF 100*1024#ifndef BUFSIZE#define BUFSIZE	4*1024#endif static intishidden(void){	int wctl;	long n;	uchar buf[80];	char *p; 	wctl = open("/dev/wctl", OREAD);	if(wctl < 0)		return 0;	n = read(wctl, buf, sizeof(buf));	close(wctl);	if(n < 12*4)		return 0;	buf[sizeof(buf)-1] = 0;	p = (char*)buf;	if(strstr(p, "hidden") != nil)		return 1;	return 0;} voideresized(Rdp* c, int refresh){	int fd;	Point d; 	USED(refresh);	if(display->locking)		lockdisplay(display);	if(getwindow(display, Refnone) < 0)		sysfatal("resize failed: %r"); 	/* lifted from /sys/src/cmd/vnc/wsys.c */	d = addpt(Pt(c->xsz, c->ysz), Pt(2*Borderwidth, 2*Borderwidth));	if(d.x < Dx(screen->r) || d.y < Dy(screen->r)){		fd = open("/dev/wctl", OWRITE);		if(fd >= 0){			fprint(fd, "resize -dx %d -dy %d", d.x, d.y);			close(fd);		}	}	turnupdates(c, 0);	turnupdates(c, !ishidden());	if(display->locking)		unlockdisplay(display);}voidinitsnarf(void){	snarffd = open("/dev/snarf", OREAD);} /* * /dev/snarf updates when the file is closed, so we must open our own * fd here rather than use snarffd */voidputsnarfn(char* s, int nb){	int fd, i; 	if(nb==0 || nb > MAXSNARF)		return;	fd = open("/dev/snarf", OWRITE);	if(fd < 0)		return;	snarfvers++;	while(nb > 0){		i = write(fd, s, nb);		if(i < 0)			break;		s += i;		nb -= i;	}	close(fd);} char*getsnarfn(int *pnb){	int i, n;	char *s, buf[BUFSIZE]; 	if(snarffd < 0)		return nil; 	s = nil;	i = 0;	seek(snarffd, 0, 0);	while((n = read(snarffd, buf, sizeof(buf))) > 0){		s = erealloc(s, i+n+1);	// an extra byte for the terminating zero		memmove(s+i, buf, n);		i += n;	}	s[i] = 0;	i++;	*pnb = i;	return s;} /* lifted from /sys/src/cmd/vnc/wsys.c */voidpollsnarf(Rdp* c){	Dir *dir; 	while(snarffd < 0){		snarffd = open("/dev/snarf", OREAD);		if(snarffd < 0)			sleep(1000*60);	} 	for(;;){		sleep(1000); 		dir = dirstat("/dev/snarf");		if(dir == nil)	/* old drawterm */			continue;		if(dir->qid.vers > snarfvers){			clipannounce(c);			snarfvers = dir->qid.vers;		}		free(dir);	}}