1 files changed, 35 insertions, 0 deletions
diff --git a/functions/lockfile.sh b/functions/lockfile.sh
new file mode 100755
index 0000000..9eb2f9b
--- /dev/null
+++ b/functions/lockfile.sh
@@ -0,0 +1,35 @@
+#!/bin/sh
+
+# lockfile.sh - handle lock files
+
+set -e
+
+Check_lockfile ()
+{
+	LOCKFILE="${1}"
+
+	# Checking lock file
+	if [ -f "${LOCKFILE}" ]
+	then
+		echo "E: system locked"
+		exit 1
+	fi
+}
+
+Create_lockfile ()
+{
+	LOCKFILE="${1}"
+	LOCKDIRECTORY="`dirname ${1}`"
+
+	# Creating lock directory
+	if [ ! -d "${LOCKDIRECTORY}" ]
+	then
+		mkdir -p "${LOCKDIRECTORY}"
+	fi
+
+	# Creating lock file
+	trap "test -f ${LOCKFILE} && \
+	rm -f ${LOCKFILE}; exit 0" 0 2 15
+
+	touch "${LOCKFILE}"
+}