From aac05c40926da9a9742e4eaaa1b02ea77539e223 Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Wed, 30 Nov 2011 15:20:43 -0500
Subject: vacfs: fix segfault when no prefix specified

R=rsc
CC=plan9port.codebot
http://codereview.appspot.com/5451052
---
 src/cmd/vac/file.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/cmd/vac/file.c b/src/cmd/vac/file.c
index ac7d4a2a..8f2fd84f 100644
--- a/src/cmd/vac/file.c
+++ b/src/cmd/vac/file.c
@@ -1774,7 +1774,7 @@ vacfsopen(VtConn *z, char *file, int mode, ulong cachemem)
 	char *prefix;
 	
 	if(vtparsescore(file, &prefix, score) >= 0){
-		if(strcmp(prefix, "vac") != 0){
+		if(prefix == nil || strcmp(prefix, "vac") != 0){
 			werrstr("not a vac file");
 			return nil;
 		}
-- 
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