From bc40af0dfd3fec1b7c2bb7ea2053d19e815385bd Mon Sep 17 00:00:00 2001
From: Daniel Banar <daniel.banar5@gmail.com>
Date: Tue, 16 Sep 2025 19:05:07 +0200
Subject: [PATCH] added simple fake-hwclock

---
 general/package/Config.in                     |  1 +
 .../package/fake-hwclock-openipc/Config.in    |  5 +++
 .../fake-hwclock-openipc.mk                   | 15 ++++++++
 .../fake-hwclock-openipc/files/S39fakehwclock | 36 +++++++++++++++++++
 .../fake-hwclock-openipc/files/fake-hwclock   | 27 ++++++++++++++
 5 files changed, 84 insertions(+)
 create mode 100644 general/package/fake-hwclock-openipc/Config.in
 create mode 100644 general/package/fake-hwclock-openipc/fake-hwclock-openipc.mk
 create mode 100755 general/package/fake-hwclock-openipc/files/S39fakehwclock
 create mode 100644 general/package/fake-hwclock-openipc/files/fake-hwclock

diff --git a/general/package/Config.in b/general/package/Config.in
index 5b94002e..459dc870 100644
--- a/general/package/Config.in
+++ b/general/package/Config.in
@@ -13,6 +13,7 @@ source "$BR2_EXTERNAL_GENERAL_PATH/package/divinus/Config.in"
 source "$BR2_EXTERNAL_GENERAL_PATH/package/dropbear-openipc/Config.in"
 source "$BR2_EXTERNAL_GENERAL_PATH/package/exfat-openipc/Config.in"
 source "$BR2_EXTERNAL_GENERAL_PATH/package/f2fs-tools-openipc/Config.in"
+source "$BR2_EXTERNAL_GENERAL_PATH/package/fake-hwclock-openipc/Config.in"
 source "$BR2_EXTERNAL_GENERAL_PATH/package/fdk-aac-openipc/Config.in"
 source "$BR2_EXTERNAL_GENERAL_PATH/package/ffmpeg-openipc/Config.in"
 source "$BR2_EXTERNAL_GENERAL_PATH/package/fullhan-osdrv-fh8852v100/Config.in"
diff --git a/general/package/fake-hwclock-openipc/Config.in b/general/package/fake-hwclock-openipc/Config.in
new file mode 100644
index 00000000..361d3029
--- /dev/null
+++ b/general/package/fake-hwclock-openipc/Config.in
@@ -0,0 +1,5 @@
+config BR2_PACKAGE_FAKE_HWCLOCK_OPENIPC
+	bool "fake-hwclock-openipc"
+	help
+	  Restores system time from a file on boot, saves the current time, or periodically updates a timestamp file to maintain time on systems without a hardware RTC.
+
diff --git a/general/package/fake-hwclock-openipc/fake-hwclock-openipc.mk b/general/package/fake-hwclock-openipc/fake-hwclock-openipc.mk
new file mode 100644
index 00000000..24748797
--- /dev/null
+++ b/general/package/fake-hwclock-openipc/fake-hwclock-openipc.mk
@@ -0,0 +1,15 @@
+################################################################################
+#
+# fake-hwclock-openipc
+#
+################################################################################
+
+define FAKE_HWCLOCK_OPENIPC_INSTALL_TARGET_CMDS
+	$(INSTALL) -m 755 -d $(TARGET_DIR)/etc/init.d
+	$(INSTALL) -m 755 -t $(TARGET_DIR)/etc/init.d $(FAKE_HWCLOCK_OPENIPC_PKGDIR)/files/S39fakehwclock
+
+	$(INSTALL) -m 755 -d $(TARGET_DIR)/usr/bin
+	$(INSTALL) -m 755 -t $(TARGET_DIR)/usr/bin $(FAKE_HWCLOCK_OPENIPC_PKGDIR)/files/fake-hwclock
+endef
+
+$(eval $(generic-package))
diff --git a/general/package/fake-hwclock-openipc/files/S39fakehwclock b/general/package/fake-hwclock-openipc/files/S39fakehwclock
new file mode 100755
index 00000000..3fe9459f
--- /dev/null
+++ b/general/package/fake-hwclock-openipc/files/S39fakehwclock
@@ -0,0 +1,36 @@
+#!/bin/sh
+
+DAEMON="fake-hwclock"
+PIDFILE="/var/run/$DAEMON.pid"
+DAEMON_ARGS="5 /etc/fake-hwclock.data"
+
+case "$1" in
+	start)
+		echo -n "Starting $DAEMON: "
+		fake-hwclock load /etc/fake-hwclock.data
+		# Save timestamp every 5 seconds
+		start-stop-daemon -b -m -S -q -p "$PIDFILE" -x "$DAEMON" -- $DAEMON_ARGS
+		if [ $? -eq 0 ]; then
+			echo "OK"
+		else
+			echo "FAIL"
+		fi
+		;;
+
+	stop)
+		echo -n "Stopping $DAEMON: "
+		start-stop-daemon -K -q -p "$PIDFILE"
+		if [ $? -eq 0 ]; then
+			rm -f "$PIDFILE"
+			fake-hwclock save /etc/fake-hwclock.data
+			echo "OK"
+		else
+			echo "FAIL"
+		fi
+		;;
+
+	*)
+		echo "Usage: $0 {start|stop}"
+		exit 1
+		;;
+esac
diff --git a/general/package/fake-hwclock-openipc/files/fake-hwclock b/general/package/fake-hwclock-openipc/files/fake-hwclock
new file mode 100644
index 00000000..361c7ada
--- /dev/null
+++ b/general/package/fake-hwclock-openipc/files/fake-hwclock
@@ -0,0 +1,27 @@
+#!/bin/sh
+
+if [[ $# -lt 2 ]]; then
+    exit 1
+fi
+
+MODE="$1"
+TIMESTAMP_FILE="$2"
+
+mkdir -p "$(dirname "$TIMESTAMP_FILE")"
+
+if [[ "$MODE" == "load" ]]; then
+    if [[ -f "$TIMESTAMP_FILE" ]]; then
+        LAST_TS=$(cat "$TIMESTAMP_FILE")
+        if [[ -n "$LAST_TS" ]]; then
+            echo "fake-hwclock: Setting time to $(date -d @"$LAST_TS")"
+        fi
+    fi
+elif [[ "$MODE" == "save" ]]; then
+    date +%s > "$TIMESTAMP_FILE"
+elif [[ "$MODE" =~ ^[0-9]+$ ]]; then
+    INTERVAL="$MODE"
+    while true; do
+        date +%s > "$TIMESTAMP_FILE"
+        sleep "$INTERVAL"
+    done
+fi