From 927b681691b293afbb798a65d4340446e7f6fb6c Mon Sep 17 00:00:00 2001
From: Calvin Morrison <mutantturkey@gmail.com>
Date: Tue, 8 Apr 2014 12:30:43 -0400
Subject: add lock

---
 src/lock | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 src/lock

(limited to 'src')

diff --git a/src/lock b/src/lock
new file mode 100644
index 0000000..22191fe
--- /dev/null
+++ b/src/lock
@@ -0,0 +1,28 @@
+lock() {
+
+	if [[ -f "$1" ]]; then
+		echo "$1 is not a lock directory."
+		exit 1
+	fi
+
+	if mkdir "$1" &>/dev/null;  then
+		echo "lock $1 created" >&2
+	else
+		echo "lock $1 found, waiting for unlock" >&2
+		while true; do
+			sleep 2;
+			if [[ ! -d "$1" ]]; then
+				return
+			fi
+		done
+	fi;
+
+}
+
+if [[ "$#" -eq "1" ]]; then
+	lock "$1"
+else
+	echo "please supply one argument: the lock directory."
+	exit 1
+fi
+
-- 
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