From 73392c2c7cc2e74759480a37e345366dfa265926 Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Mon, 12 Dec 2011 16:44:50 -0500
Subject: libventi: fix segfault in vtreadpacket when not connected

This problem happens especially in fossil/view when vtread
can be called even if not connected to venti.

The old libventi handle this case properly in the function vtRPC, which is called by vtReadPacket (client.c).

R=rsc
CC=plan9port.codebot
http://codereview.appspot.com/5484044
---
 src/libventi/client.c | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'src')

diff --git a/src/libventi/client.c b/src/libventi/client.c
index 9f200f48..f76fd343 100644
--- a/src/libventi/client.c
+++ b/src/libventi/client.c
@@ -65,6 +65,11 @@ vtreadpacket(VtConn *z, uchar score[VtScoreSize], uint type, int n)
 	if(memcmp(score, vtzeroscore, VtScoreSize) == 0)
 		return packetalloc();
 
+	if(z == nil){
+		werrstr("not connected");
+		return nil;
+	}
+
 	if(z->version[1] == '2' && n >= (1<<16)) {
 		werrstr("read count too large for protocol");
 		return nil;
-- 
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