#include <u.h>#include <libc.h>#include <draw.h> static Pointfontsize(void){	char *fontname;	Font *f;	Point sz; 	if((fontname = getenv("font")) == nil)		return Pt(8, 12); 	if((f = openfont(nil, fontname)) == nil){		fprint(2, "%s: %s cannot open - %r\n", argv0, fontname);		free(fontname);		return Pt(8, 12);	}	sz = stringsize(f, "0");	freefont(f);	free(fontname);	return sz;} intgetgeom(int *cols, int *lines, int *width, int *height){	char *a[6], buf[64];	int fd, n;	Point sz; 	if((fd = open("/dev/wctl", OREAD)) < 0)		return -1; 	/* wait for event, but don't care what it says */	if((n = read(fd, buf, sizeof buf)) < 0){		fprint(2, "%s: /dev/wctl read failed - %r\n", argv0);		close(fd);		return -1;	} 	buf[n-1] = 0;	if((n = tokenize(buf, a, nelem(a))) < 4){		fprint(2, "%s: /dev/wctl too few tokens (%d<4)\n", argv0, n);		close(2);		return -1;	}	close(fd); 	sz = fontsize(); 	/*	 * This code lifted from mc.c, and is correct for rio(1) windows.	 * 4 pixels left edge	 * 1 pixels gap	 * 12 pixels scrollbar	 * 4 pixels gap	 * text	 * 4 pixels right edge	 *	 * 4 pixels top and bottom edges	 */	*width = atoi(a[2]) - atoi(a[0]) - (4+1+12+4+4);	*height = atoi(a[3]) - atoi(a[1]) - (4+4);	*lines = *height / sz.y;	*cols = *width / sz.x; 	return 0;}