From mboxrd@z Thu Jan  1 00:00:00 1970
Date: Fri, 11 Aug 1995 20:56:50 -0400
From: forsyth@plan9.cs.york.ac.uk forsyth@plan9.cs.york.ac.uk
Subject: ed buglet
Topicbox-Message-UUID: 161d72ca-eac8-11e9-9e20-41e7f4b1d025
Message-ID: <19950812005650.psJfpA1HwdIHqfFEtqgIKv7u2bLwXuz90jqKR7sZs84@z>

ed neither ignores nor delays interrupts during a shell escape.
try:

p9gate% diff old/ed.c /sys/src/cmd/ed.c
55a56
> int	waiting;
677c678
< 		if(rescuing)
---
> 		if(rescuing || waiting)
905a907
> 	int pid;
919c921
< 	if(fork() == 0) {
---
> 	if((pid = fork()) == 0) {
923c925,928
< 	wait(&w);
---
> 	waiting = 1;
> 	while(wait(&w) != pid)
> 		;
> 	waiting = 0;