From mboxrd@z Thu Jan  1 00:00:00 1970
Date: Thu, 20 Nov 1997 13:04:54 -0500
From: Tad Hunt tad@csh.rit.edu
Subject: [9fans] Novice use of libg
Topicbox-Message-UUID: 6ba5ad48-eac8-11e9-9e20-41e7f4b1d025
Message-ID: <19971120180454.F_Z6xRxIy7ZuHv5TM-i7wmWGRr7IwGwc3NiNvsBRdE8@z>

In message <swordfish.880045065@minster.cs.york.ac.uk>, you said:
;------------------------------- cut here -----------------------
;int
;main(int argc, char **argv) {
;	Mouse mouse;
;	ulong Estdin;
;	bool done = false;
;	progname = argv[0];
;	binit(panic, 0, progname);
;	if ((Estdin = estart((ulong)0, 0, 8192)) == 0)
;		panic("Estdin = estart(0, 0, 8192) fails");
;	einit(Emouse | Estdin);
;	do {
;		struct Event e;
;		ulong key = eread(Emouse | Estdin, &e);
;		if (key == Estdin) {
;fprintf(stderr, "debug: Estdin, e.n %d\n", e.n); fflush(stderr);
;		} else if (key == Emouse) {
;fprintf(stderr, "debug: Emouse, x %d y %d\n", e.mouse.xy.x, e.mouse.xy.y);
;fflush(stderr);
;		} else
;			panic("unexpected event");
;	} while (!done);

I see two problems off the top of my head:
    eread() is only called once.
    done is never set to "true", thus the looping.