SystemD services & "reboot" using kexec (#1)

* Add: systemd services

* add --reboot on m2_exec.sh to kexec into the running kernel

* rem reboot from m2_exec.sh

install.sh

@@ -0,0 +1,70 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+BINARY_NAME="ps5_control"
+INSTALL_BIN="/usr/local/sbin/${BINARY_NAME}"
+SYSTEMD_DIR="/etc/systemd/system"
+
+usage() {
+    cat <<EOF
+Usage: sudo $0
+
+Installs:
+  ${INSTALL_BIN}
+  ${SYSTEMD_DIR}/ps5fan.service
+  ${SYSTEMD_DIR}/ps5boost.service
+
+Both services are enabled and started by default. Disable either one with:
+  sudo systemctl disable --now ps5fan.service
+  sudo systemctl disable --now ps5boost.service
+EOF
+}
+
+while [[ $# -gt 0 ]]; do
+    case "$1" in
+        -h|--help)
+            usage
+            exit 0
+            ;;
+        *)
+            echo "This installer does not accept options: $1" >&2
+            usage >&2
+            exit 1
+            ;;
+    esac
+    shift
+done
+
+if [[ ${EUID} -ne 0 ]]; then
+    echo "Run as root: sudo $0" >&2
+    exit 1
+fi
+
+if ! command -v systemctl >/dev/null 2>&1; then
+    echo "systemctl not found; this installer requires systemd." >&2
+    exit 1
+fi
+
+SCRIPT_DIR="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"
+cd "${SCRIPT_DIR}"
+
+echo "Building ${BINARY_NAME}..."
+make "${BINARY_NAME}"
+
+echo "Installing ${INSTALL_BIN}..."
+install -Dm755 "${BINARY_NAME}" "${INSTALL_BIN}"
+
+echo "Installing systemd units..."
+install -Dm644 systemd/ps5fan.service "${SYSTEMD_DIR}/ps5fan.service"
+install -Dm644 systemd/ps5boost.service "${SYSTEMD_DIR}/ps5boost.service"
+
+systemctl daemon-reload
+
+echo "Enabling and starting ps5fan.service and ps5boost.service..."
+systemctl enable --now ps5fan.service ps5boost.service
+
+echo "Done."
+echo "Disable services you do not want:"
+echo "  sudo systemctl disable --now ps5fan.service"
+echo "  sudo systemctl disable --now ps5boost.service"