From 52e4e51b50589ecb2b06559c28b7ce9f682815be Mon Sep 17 00:00:00 2001
From: cinap_lenrek <cinap_lenrek@felloff.net>
Date: Wed, 11 Dec 2019 23:52:05 +0100
Subject: [PATCH] devcons: fix write length of writebintime() (thanks BurnZeZ)

---
 sys/src/9/port/devcons.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/sys/src/9/port/devcons.c b/sys/src/9/port/devcons.c
index 79698c408..551e4b5b2 100644
--- a/sys/src/9/port/devcons.c
+++ b/sys/src/9/port/devcons.c
@@ -913,7 +913,8 @@ writebintime(char *buf, int n)
 	vlong delta;
 	long period;
 
-	n--;
+	if(--n <= 0)
+		error(Ebadtimectl);
 	p = (uchar*)buf + 1;
 	switch(*buf){
 	case 'n':
@@ -938,7 +939,7 @@ writebintime(char *buf, int n)
 		todsetfreq(fasthz);
 		break;
 	}
-	return n;
+	return n+1;
 }
 
 void