1 #include <u.h>
2 #include <libc.h>
3 #include <draw.h>
4 #include <mouse.h>
5 #include <cursor.h>
6 #include <drawfcall.h>
7 
8 void
9 usage(void)
10 {
11 	fprint(2, "usage: devdraw (don't run  directly)\n");
12 	exits("usage");
13 }
14 
15 void
16 main(int argc, char **argv)
17 {
18 	int n;
19 	uchar buf[1024*1024];
20 	Wsysmsg m;
21 	
22 	ARGBEGIN{
23 	case 'D':
24 		break;
25 	default:
26 		usage();
27 	}ARGEND
28 	
29 	if(argc != 0)
30 		usage();
31 
32 	while((n = readwsysmsg(0, buf, sizeof buf)) > 0){
33 		convM2W(buf, n, &m);
34 		m.type = Rerror;
35 		m.error = "no window system present";
36 		n = convW2M(&m, buf, sizeof buf);
37 		write(1, buf, n);
38 	}
39 	exits(0);
40 }