[hackers] [sbase][patch] Fix line buffering issue with ed prompt

[Samadi van Koten]

This patch fixes an issue where ed wouldn't output the prompt until 
exitting, due to stdout buffering. To fix it I simply added fflush after 
the fputs that outputs the prompt.

Hope this is useful.
--
Samadi van Koten

>From c8e819361b0f331bdf586ba1abc0172892bf006b Mon Sep 17 00:00:00 2001
From: Samadi van Koten <sam...@vktec.co.uk>
Date: Sun, 28 Jan 2018 14:51:38 +0000
Subject: [PATCH] Fix line buffering issue with ed prompt

This fixes an issue whereby ed would not output the prompt (when
enabled) until after exitting due to stdout being line-buffered.
---
 ed.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/ed.c b/ed.c
index 4b28848..f45535c 100644
--- a/ed.c
+++ b/ed.c
@@ -1374,8 +1374,10 @@ edit(void)
 		ocurln = curln;
 		cmdsiz = 0;
 		repidx = -1;
-		if (optprompt)
+		if (optprompt) {
 			fputs(prompt, stdout);
+			fflush(stdout);
+		}
 		getlst();
 		chkglobal() ? doglobal() : docmd();
 	}
-- 
2.11.0