p2pool: Restart monerod only when needed and with proper args

main.qml

@@ -748,6 +748,12 @@ ApplicationWindow {
         currentWallet.startRefresh();
         informationPopup.title = qsTr("Daemon failed to start") + translationManager.emptyString;
         informationPopup.text  = error + ".\n\n" + qsTr("Please check your wallet and daemon log for errors. You can also try to start %1 manually.").arg((isWindows)? "monerod.exe" : "monerod")
+        if (middlePanel.advancedView.miningView.stopMiningEnabled == true) {
+            walletManager.stopMining()
+            p2poolManager.exit()
+            middlePanel.advancedView.miningView.update()
+            informationPopup.text += qsTr("\n\nExiting p2pool. Please check that port 18083 is available.") + translationManager.emptyString;
+        }
         informationPopup.icon  = StandardIcon.Critical
         informationPopup.onCloseCallback = null
         informationPopup.open();

pages/Mining.qml

@@ -41,7 +41,8 @@ Rectangle {
     property alias miningHeight: mainLayout.height
     property double currentHashRate: 0
     property int threads: idealThreadCount / 2
-
+    property alias stopMiningEnabled: stopSoloMinerButton.enabled
+    property string args: ""
     ColumnLayout {
         id: mainLayout
         Layout.fillWidth: true
@@ -293,11 +294,18 @@ Rectangle {
                                 var success;
                                 if (persistentSettings.allow_p2pool_mining) {
                                     if (p2poolManager.isInstalled()) {
-                                        if (persistentSettings.allowRemoteNodeMining) {
+                                        args = daemonManager.getArgs(persistentSettings.blockchainDataDir) //updates arguments
+                                        if (persistentSettings.allowRemoteNodeMining || (args.includes("--zmq-pub tcp://127.0.0.1:18083") || args.includes("--zmq-pub=tcp://127.0.0.1:18083")) && !args.includes("--no-zmq")) {
                                             startP2Pool()
                                         }
                                         else {
-                                            daemonManager.stopAsync(persistentSettings.nettype, persistentSettings.blockchainDataDir, startP2PoolLocal)
+                                            var underSystemd = daemonManager.checkUnderSystemd();
+                                            if (underSystemd) {
+                                                miningError(qsTr("Monerod is managed by Systemd. Manually add --zmq-pub tcp://127.0.0.1:18083 to the unit file <br>") + translationManager.emptyString)
+                                            }
+                                            else {
+                                                daemonManager.stopAsync(persistentSettings.nettype, persistentSettings.blockchainDataDir, startP2PoolLocal)
+                                            }
                                         }
                                     }
                                     else {
@@ -585,12 +593,35 @@ Rectangle {
 
     function startP2PoolLocal() {
         var noSync = false;
-        var customDaemonArgs = persistentSettings.daemonFlags.toLowerCase();
-        var daemonArgs = "--zmq-pub " + "tcp://127.0.0.1:18083 " + "--disable-dns-checkpoints "
-        if (!customDaemonArgs.includes("--zmq-pub") && !customDaemonArgs.includes("--disable-dns-checkpoints") && !customDaemonArgs.includes("--no-zmq")) {
-            daemonArgs = daemonArgs + customDaemonArgs;
+        //these args will be deleted because DaemonManager::start will re-add them later.
+        //--no-zmq must be deleted. removing '--zmq-pub=tcp...' lets us blindly add '--zmq-pub tcp...' later without risking duplication.
+        var defaultArgs = ["--detach","--data-dir","--bootstrap-daemon-address","--prune-blockchain","--no-sync","--check-updates","--non-interactive","--max-concurrency","--no-zmq","--zmq-pub=tcp://127.0.0.1:18083"]
+        var customDaemonArgsArray = args.split(' ');
+        var flag = "";
+        var allArgs = [];
+        var p2poolArgs = ["--zmq-pub tcp://127.0.0.1:18083"];
+        //create an array (allArgs) of ['--arg value','--arg2','--arg3']
+        for (let i = 0; i < customDaemonArgsArray.length; i++) {
+            if(!customDaemonArgsArray[i].startsWith("--")) {
+                flag += " " + customDaemonArgsArray[i]
+            } else {
+                if(flag){
+                    allArgs.push(flag)
+                }
+                flag = customDaemonArgsArray[i]
+            }
+        }
+        allArgs.push(flag)
+        //pop from allArgs if value is inside the deleteme array (defaultArgs)
+allArgs = allArgs.filter( ( el ) => !defaultArgs.includes( el.split(" ")[0] ) )
+        //append required p2pool flags
+        for (let i = 0; i < p2poolArgs.length; i++) {
+            if(!allArgs.includes(p2poolArgs[i])) {
+                allArgs.push(p2poolArgs[i])
+                continue
+            }
         }
-        var success = daemonManager.start(daemonArgs, persistentSettings.nettype, persistentSettings.blockchainDataDir, persistentSettings.bootstrapNodeAddress, noSync, persistentSettings.pruneBlockchain)
+        var success = daemonManager.start(allArgs.join(" "), persistentSettings.nettype, persistentSettings.blockchainDataDir, persistentSettings.bootstrapNodeAddress, noSync, persistentSettings.pruneBlockchain)
         if (success) {
             startP2Pool()
         }

src/daemon/DaemonManager.cpp

@@ -342,6 +342,85 @@ bool DaemonManager::checkLmdbExists(QString datadir) {
     return validateDataDir(datadir).value("lmdbExists").value<bool>();
 }
 
+bool DaemonManager::checkUnderSystemd() {
+    #ifdef Q_OS_LINUX
+        QProcess p;
+        QStringList args;
+        args << "monerod";
+        p.setProgram("pgrep");
+        p.setArguments(args);
+        p.start();
+        p.waitForFinished();
+        QString pid = p.readAllStandardOutput().trimmed();
+        if (pid.isEmpty()) {
+            return false;
+        }
+        args.clear();
+
+        args << "-c";
+        args << "ps -eo pid,cgroup | grep " + pid + " | grep -q .service$";
+        p.setProgram("sh");
+        p.setArguments(args);
+        p.start();
+        p.waitForFinished();
+        if (p.exitCode() == 0) {
+            return true;
+        }
+    #endif
+    return false;
+}
+
+QString DaemonManager::getArgs(const QString &dataDir) {
+    if (!running(NetworkType::MAINNET, dataDir)) {
+        return args;
+    }
+    QProcess p;
+    QStringList tempArgs;
+    #ifdef Q_OS_WIN
+        //powershell
+        tempArgs << "Get-CimInstance Win32_Process -Filter \"name = 'monerod.exe'\" | select -ExpandProperty CommandLine ";
+        p.setProgram("powershell");
+        p.setArguments(tempArgs);
+        p.start();
+        p.waitForFinished();
+        args = p.readAllStandardOutput().simplified().trimmed();
+
+    #elif defined(Q_OS_UNIX)
+        //pgrep
+        tempArgs << "monerod";
+        p.setProgram("pgrep");
+        p.setArguments(tempArgs);
+        p.start();
+        p.waitForFinished();
+        QString pid = p.readAllStandardOutput().trimmed();
+        if (pid.isEmpty()) {
+            return args;
+        }
+
+        tempArgs.clear();
+
+        //ps
+        tempArgs << "-o";
+        tempArgs << "args=";
+        tempArgs << "-fp";
+        tempArgs << pid;
+        p.setProgram("ps");
+        p.setArguments(tempArgs);
+        p.start();
+        p.waitForFinished();
+        args = p.readAllStandardOutput().trimmed();
+
+    #endif
+    if (args.contains("--")) {
+        int index = args.indexOf("--");
+        args.remove(0, index);
+    }
+    else {
+        args = "";
+    }
+    return args;
+}
+
 DaemonManager::DaemonManager(QObject *parent)
     : QObject(parent)
     , m_scheduler(this)

src/daemon/DaemonManager.h

@@ -58,6 +58,8 @@ class DaemonManager : public QObject
     Q_INVOKABLE void exit();
     Q_INVOKABLE QVariantMap validateDataDir(const QString &dataDir) const;
     Q_INVOKABLE bool checkLmdbExists(QString datadir);
+    Q_INVOKABLE QString getArgs(const QString &dataDir);
+    Q_INVOKABLE bool checkUnderSystemd();
 
 private:
 
@@ -82,6 +84,7 @@ public slots:
     QString m_monerod;
     bool m_app_exit = false;
     bool m_noSync = false;
+    QString args = "";
 
     mutable FutureScheduler m_scheduler;
 };