From fc2661f08a3ef08edec7704339577cc5c8c962e7 Mon Sep 17 00:00:00 2001
From: "Jason A. Donenfeld" <Jason@zx2c4.com>
Date: Tue, 26 Jun 2018 00:59:25 +0200
Subject: patch-kernel: only allow one execution at a time, with others failing
 open

---
 fetch.sh | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fetch.sh b/fetch.sh
index dcc25de..4b00f43 100644
--- a/fetch.sh
+++ b/fetch.sh
@@ -2,6 +2,9 @@
 set -e
 USER_AGENT="WireGuard-AndroidROMBuild/0.1 ($(uname -a))"
 
+exec 9>.wireguard-fetch-lock
+flock -n 9 || exit 0
+
 [[ $(( $(date +%s) - $(stat -c %Y "net/wireguard/.check" 2>/dev/null || echo 0) )) -gt 86400 ]] || exit 0
 
 [[ $(curl -A "$USER_AGENT" -LSs https://git.zx2c4.com/WireGuard/refs/) =~ snapshot/WireGuard-([0-9.]+)\.tar\.xz ]]
-- 
cgit v1.3-18-gd494