1 files changed, 47 insertions, 0 deletions
diff --git a/system-build/functions/lockfile.sh b/system-build/functions/lockfile.sh
new file mode 100755
index 0000000..cabb85f
--- /dev/null
+++ b/system-build/functions/lockfile.sh
@@ -0,0 +1,47 @@
+#!/bin/sh
+
+## live-build(7) - System Build Scripts
+## Copyright (C) 2006-2015 Daniel Baumann <mail@daniel-baumann.ch>
+##
+## This program comes with ABSOLUTELY NO WARRANTY; for details see COPYING.
+## This is free software, and you are welcome to redistribute it
+## under certain conditions; see COPYING for details.
+
+
+Check_lockfile ()
+{
+	FILE="${1}"
+
+	if [ -z "${FILE}" ]
+	then
+		FILE=".build/lock"
+	fi
+
+	# Checking lock file
+	if [ -f "${FILE}" ]
+	then
+		Echo_error "${PROGRAM} locked"
+		exit 1
+	fi
+}
+
+Create_lockfile ()
+{
+	FILE="${1}"
+
+	if [ -z "${FILE}" ]
+	then
+		FILE=".build/lock"
+	fi
+
+	DIRECTORY="$(dirname ${FILE})"
+
+	# Creating lock directory
+	mkdir -p "${DIRECTORY}"
+
+	# Creating lock trap
+	trap 'ret=${?}; '"rm -f \"${FILE}\";"' exit ${ret}' EXIT HUP INT QUIT TERM
+
+	# Creating lock file
+	touch "${FILE}"
+}