From c1c098080b8ab5b3c612d4a86c03bdade69fe3e8 Mon Sep 17 00:00:00 2001
From: Max Krummenacher <max.krummenacher@toradex.com>
Date: Mon, 7 Jan 2019 19:41:45 +0100
Subject: timestamp-service: import from angstrom

Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com>
---
 recipes-core/systemd/timestamp-service.bb          | 30 ++++++++++++++++++++++
 .../systemd/timestamp-service/load-timestamp.sh    | 21 +++++++++++++++
 .../systemd/timestamp-service/timestamp.service    | 12 +++++++++
 3 files changed, 63 insertions(+)
 create mode 100644 recipes-core/systemd/timestamp-service.bb
 create mode 100644 recipes-core/systemd/timestamp-service/load-timestamp.sh
 create mode 100644 recipes-core/systemd/timestamp-service/timestamp.service

diff --git a/recipes-core/systemd/timestamp-service.bb b/recipes-core/systemd/timestamp-service.bb
new file mode 100644
index 0000000..b1d4902
--- /dev/null
+++ b/recipes-core/systemd/timestamp-service.bb
@@ -0,0 +1,30 @@
+DESCRIPTION = "Poor mans RTC using timestamps"
+LICENSE = "MIT"
+LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda2f7b4f302"
+
+inherit allarch systemd
+
+SRC_URI = "file://timestamp.service \
+           file://load-timestamp.sh \
+          "
+
+do_compile() {
+    :
+}
+
+
+do_install () {
+	install -d ${D}/${bindir}
+
+	install -m 0755 ${WORKDIR}/load-timestamp.sh ${D}/${bindir}
+
+	install -d ${D}/${base_libdir}/systemd/system
+	install -m 0644 ${WORKDIR}/timestamp.service ${D}/${base_libdir}/systemd/system/
+}
+
+NATIVE_SYSTEMD_SUPPORT = "1"
+SYSTEMD_PACKAGES = "${PN}"
+SYSTEMD_SERVICE_${PN} = "timestamp.service"
+
+FILES_${PN} += "${base_libdir}/systemd"
+
diff --git a/recipes-core/systemd/timestamp-service/load-timestamp.sh b/recipes-core/systemd/timestamp-service/load-timestamp.sh
new file mode 100644
index 0000000..6902d1d
--- /dev/null
+++ b/recipes-core/systemd/timestamp-service/load-timestamp.sh
@@ -0,0 +1,21 @@
+#!/bin/sh
+
+if [ "$1" != "--save" ] ; then
+
+# Set the system clock from timestamp file
+# if the timestamp is 1 second or more recent
+# than the current systemtime.
+
+SYSTEMDATE=$(/bin/date -u "+%4Y%2m%2d%2H%2M%2S")
+
+TIMESTAMP=$(/bin/cat /etc/timestamp 2>/dev/null)
+
+if [ $SYSTEMDATE -lt $TIMESTAMP ] 2>/dev/null ; then
+	echo "Update systemtime from /etc/timestamp"
+	/bin/date -u ${TIMESTAMP:4:8}${TIMESTAMP:0:4}.${TIMESTAMP:(-2)}
+fi
+
+else
+# Store the current systemtime in /etc/timestamp
+	/bin/date -u +%4Y%2m%2d%2H%2M%2S > /etc/timestamp
+fi
diff --git a/recipes-core/systemd/timestamp-service/timestamp.service b/recipes-core/systemd/timestamp-service/timestamp.service
new file mode 100644
index 0000000..9be5056
--- /dev/null
+++ b/recipes-core/systemd/timestamp-service/timestamp.service
@@ -0,0 +1,12 @@
+[Unit]
+Description=Timestamping service
+ConditionPathExists=/etc/timestamp
+After=remount-rootfs.service
+
+[Service]
+RemainAfterExit=yes
+ExecStart=/usr/bin/load-timestamp.sh
+ExecStop=/usr/bin/load-timestamp.sh --save
+
+[Install]
+WantedBy=basic.target
-- 
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