[sailfish-utilities] Add a Restart Fingerprint button. Fixes JB#57941

Adds a button for restarting the fingerprint service. In practice, it
restarts, waits 3 seconds and then restarts again.

In some situations where the fingerprint cache gets messed up, which
prevents fingerprints from being recognised, this sequence resolves the
issue.

plugin/utiltools.cpp

@@ -35,6 +35,11 @@ void UtilTools::restartLipstick(QJSValue successCallback, QJSValue errorCallback
     execute(SystemTool, QStringList("restart_lipstick"), successCallback, errorCallback);
 }
 
+void UtilTools::restartFingerprint(QJSValue successCallback, QJSValue errorCallback)
+{
+    execute(SystemTool, QStringList("restart_fingerprint"), successCallback, errorCallback);
+}
+
 void UtilTools::handleProcessExit(int exitCode, QProcess::ExitStatus status)
 {
     QProcess *process = qobject_cast<QProcess*>(sender());

plugin/utiltools.h

@@ -24,6 +24,9 @@ class UtilTools: public QObject
     Q_INVOKABLE void restartLipstick(QJSValue successCallback = QJSValue::UndefinedValue,
                                      QJSValue errorCallback = QJSValue::UndefinedValue);
 
+    Q_INVOKABLE void restartFingerprint(QJSValue successCallback = QJSValue::UndefinedValue,
+                                        QJSValue errorCallback = QJSValue::UndefinedValue);
+
 private slots:
     void handleProcessExit(int exitCode, QProcess::ExitStatus status);
 

qml/ActionList.qml

@@ -29,7 +29,8 @@ Column {
             plugins.append(info)
         }
         var names = [ "RestartNetwork", "RestartUI",
-                      "CleanPackageCache", "CleanTracker" ]
+                      "CleanPackageCache", "CleanTracker",
+                      "RestartFingerprint"]
         for (var i = 0; i < names.length; ++i)
             justLoad(names[i])
     }

qml/plugins/RestartFingerprint.qml

@@ -0,0 +1,19 @@
+import QtQuick 2.0
+import Sailfish.Silica 1.0
+import Sailfish.Utilities 1.0
+
+ActionItem {
+    //% "Fingerprint"
+    title: qsTrId("sailfish-tools-he-fingerprint")
+    //% "Restart"
+    actionName: qsTrId("sailfish-tools-bt-fingerprint_restart")
+    deviceLockRequired: false
+    //% "Restart fingerprint service. In some circumstancces this can "
+    //% "resolve issues where valid fingerprints are no longer being "
+    //% "recognised."
+    description: qsTrId("sailfish-utilities-restart-fingerprint_desc")
+
+    function action(on_reply, on_error) {
+        UtilTools.restartFingerprint(on_reply, on_error)
+    }
+}

tools/CMakeLists.txt

@@ -22,5 +22,6 @@ install(PROGRAMS
       restart_network.sh
       restart_lipstick.sh
       tracker_reindex.sh
+      restart_fingerprint.sh
       DESTINATION share/sailfish-utilities
 )

tools/restart_fingerprint.sh

@@ -0,0 +1,18 @@
+#!/bin/sh
+
+warning() {
+    printf "%s: Warning: %s\n" "$(basename $0)" "${@}" 1>&2;
+}
+
+service_do() {
+    if systemctl "$1" "$2"; then
+        return 0;
+    else
+        warning "Status $? on" "${@}"
+        return 1;
+    fi
+}
+
+service_do restart sailfish-fpd
+sleep 3
+service_do restart sailfish-fpd

tools/sailfish_tools_system_action.cpp

@@ -66,11 +66,14 @@ std::map<std::string, action_type> actions = {
         }},
     { "tracker_reindex", [](action_ctx const *) {
             return execute_own_utility("tracker_reindex.sh");
+        }},
+    { "restart_fingerprint", [](action_ctx const *) {
+            return execute_own_utility("restart_fingerprint.sh");
         }}
 };
 
 std::set<std::string> root_actions = {
-    "repair_rpm_db", "restart_network"
+    "repair_rpm_db", "restart_network", "restart_fingerprint"
 };
 
 class BecomeRoot