From: Matthias Kruk <m@m10k.eu>
Date: Tue, 20 Apr 2021 23:24:39 +0000 (+0900)
Subject: include/mutex: Make mutex_lock() fail if the path does not exist
X-Git-Url: https://git.corax.cc/?a=commitdiff_plain;h=7af7283f56eb96d5604bc8d7648639ab935258ad;p=toolbox

include/mutex: Make mutex_lock() fail if the path does not exist

The mutex_lock() function does not check if the path of the mutex
exists, causing it to wait forever if an invalid path was passed.
This commit makes mutex_lock() fail if it could not inotifywait on
the directory that contains the mutex.
---

diff --git a/include/mutex.sh b/include/mutex.sh
index edc4da7..01f67ac 100644
--- a/include/mutex.sh
+++ b/include/mutex.sh
@@ -27,7 +27,9 @@ mutex_lock() {
 	lock="$1"
 
 	while ! mutex_trylock "$lock"; do
-		inotifywait -qq "${lock%/*}"
+		if ! inotifywait -qq "${lock%/*}"; then
+			return 1
+		fi
 	done
 
 	return 0