From 4ae38efc1c28c968d2c5e26d305d917dd25b6594 Mon Sep 17 00:00:00 2001
From: cinap_lenrek <cinap_lenrek@gmx.de>
Date: Tue, 4 Dec 2012 06:06:28 +0100
Subject: ape/mv: check if from path fits and error if too long

---
 sys/src/ape/cmd/mv.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/sys/src/ape/cmd/mv.c b/sys/src/ape/cmd/mv.c
index 14423c149..4764e34f5 100644
--- a/sys/src/ape/cmd/mv.c
+++ b/sys/src/ape/cmd/mv.c
@@ -85,7 +85,13 @@ mv1(char *from, Dir *dirb, char *todir, char *toelem)
 	char *fromdir, *fromelem;
 	Dir *dirt, null;
 
-	strncpy(fromname, from, sizeof fromname);
+	i = strlen(from);
+	if(i >= sizeof(fromname)){
+		fprint(2, "mv: path too big (max %d): %s\n",
+			sizeof(fromname), from);
+		return -1;
+	}
+	memmove(fromname, from, i+1);
 	split(from, &fromdir, &fromelem);
 	if(toelem == 0)
 		toelem = fromelem;
-- 
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