From 892ccaf6f9782d8d5159d45649adfa0f8c8d06a6 Mon Sep 17 00:00:00 2001
From: "Jason A. Donenfeld" <Jason@zx2c4.com>
Date: Tue, 26 Sep 2017 15:02:41 +0200
Subject: tools: uapi: only make sure socket file is socket

---
 src/tools/ipc.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

(limited to 'src')

diff --git a/src/tools/ipc.c b/src/tools/ipc.c
index d0b5a46..45278ec 100644
--- a/src/tools/ipc.c
+++ b/src/tools/ipc.c
@@ -129,11 +129,16 @@ out:
 
 static bool userspace_has_wireguard_interface(const char *interface)
 {
-	FILE *f = userspace_interface_file(interface);
-	if (!f)
+	struct stat sbuf;
+	char path[PATH_MAX] = { 0 };
+
+	if (strchr(interface, '/'))
 		return false;
-	fclose(f);
-	return true;
+	if (snprintf(path, sizeof(path) - 1, SOCK_PATH "%s" SOCK_SUFFIX, interface) < 0)
+		return false;
+	if (stat(path, &sbuf) < 0)
+		return false;
+	return S_ISSOCK(sbuf.st_mode);
 }
 
 static int userspace_get_wireguard_interfaces(struct inflatable_buffer *buffer)
-- 
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