new draw server

src/cmd/devdraw/nowsys.c

@@ -0,0 +1,40 @@
+#include <u.h>
+#include <libc.h>
+#include <draw.h>
+#include <mouse.h>
+#include <cursor.h>
+#include <drawfcall.h>
+
+void
+usage(void)
+{
+	fprint(2, "usage: devdraw (don't run  directly)\n");
+	exits("usage");
+}
+
+void
+main(int argc, char **argv)
+{
+	int n;
+	uchar buf[1024*1024];
+	Wsysmsg m;
+	
+	ARGBEGIN{
+	case 'D':
+		break;
+	default:
+		usage();
+	}ARGEND
+	
+	if(argc != 0)
+		usage();
+
+	while((n = readwsysmsg(0, buf, sizeof buf)) > 0){
+		convM2W(buf, n, &m);
+		m.type = Rerror;
+		m.error = "no window system present";
+		n = convW2M(&m, buf, sizeof buf);
+		write(1, buf, n);
+	}
+	exits(0);
+}