From: Sasha Levin <levinsasha928@gmail.com>
Date: Tue, 25 Oct 2011 13:21:49 +0000 (+0200)
Subject: kvm tools: Avoid overwriting socket files with same name
X-Git-Tag: next-20111101~5^2~13
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=64b9771575d7d909eca905e0736c537f166bc6bc;p=karo-tx-linux.git

kvm tools: Avoid overwriting socket files with same name

This patch prevents overwriting socket files by running two instances with
the same name.

Reported-by: Osier Yang <jyang@redhat.com>
Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
---

diff --git a/tools/kvm/kvm.c b/tools/kvm/kvm.c
index 6f1f107c69b5..f470c1707b4c 100644
--- a/tools/kvm/kvm.c
+++ b/tools/kvm/kvm.c
@@ -157,6 +157,9 @@ static int kvm__create_socket(struct kvm *kvm)
 	sprintf(full_name, "%s", kvm__get_dir());
 	mkdir(full_name, 0777);
 	sprintf(full_name, "%s/%s.sock", kvm__get_dir(), kvm->name);
+	if (access(full_name, F_OK) == 0)
+		die("Socket file %s already exist", full_name);
+
 	s = socket(AF_UNIX, SOCK_STREAM, 0);
 	if (s < 0)
 		return s;