Initial Commit

.idea/.gitignore

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+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

CMakeLists.txt

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+cmake_minimum_required(VERSION 3.31)
+project(home_lab_watchdog_keepalive)
+
+set(CMAKE_CXX_STANDARD 20)
+
+add_executable(home_lab_watchdog_keepalive main.cpp
+        str_utils.h
+        str_utils.cpp)

main.cpp

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+#include <cstring>
+#include <iostream>
+#include <unistd.h>
+#include "str_utils.h"
+
+const char* VERSION = "0.0.1-DEV";
+
+bool shortHand(const char* str, char shortHand);
+
+int main(const int argc, char** argv) {
+
+    if (argc > 1) {
+        for (int i = 1; i < argc; i++) {
+            const char* arg = argv[i];
+            if (strcmp(arg, "--help") == 0 || shortHand(arg, 'h')) {
+                std::cout << "Server Arduino Watchdog version '" << VERSION << "' by Zacharias (c) 2025" << std::endl
+                << std::endl
+                << "Options:" << std::endl
+                << "[requires root] -short --long-option Description" << std::endl
+                << "[X]     --init          Initializes the Server end of this system, find the arduino and creates systemd services" << std::endl
+                << "    -h  --help          Prints this help message" << std::endl
+                << "    -b  --heartbeat     Sends a heartbeat to the arduino, Intended to be send by systemd unit and timer" << std::endl
+                << "    -i  --info          Queries the Arduino Watchdog for status, like time before time-out" << std::endl
+                << "    -v  --version       Print's the version" << std::endl
+                ;
+                return 0;
+            }
+            else if (strcmp(arg, "--init") == 0) {
+                if (getuid() != 0) {
+                    std::cerr << "Initialization requires root!" << std::endl;
+                    return -1;
+                }
+                std::cout << "Initialization :)" << std::endl;
+                // TODO: Add init system
+            }
+            else if (strcmp(arg, "--heartbeat") == 0 || shortHand(arg, 'b')) {
+                // TODO: Send heartbeat
+            }
+            else if (strcmp(arg, "--info") == 0 || shortHand(arg, 'i')) {
+                // TODO: Send info
+                // TODO: Print response status
+            }
+            else if (strcmp(arg, "--version") == 0 || shortHand(arg, 'v')) {
+                std::cout << VERSION << " by Zacharias (c) 2025" << std::endl;
+            }
+            else {
+                std::cerr << "Unknown option '" << arg << "'" << std::endl << "Test '" << argv[0] << " --help'" << std::endl;
+                return -1;
+            }
+        }
+    }
+    else {
+        std::cerr << "Missing arguments, try " << argv[0] << " --help" << std::endl;
+        return -1;
+    }
+    return -1;
+}
+
+bool shortHand(const char* str, char shortHand) {
+    if (str == nullptr) return false;
+    if (shortHand == 0) return false;
+    return startWith(str, '-') && contains(str, shortHand);
+}

str_utils.cpp

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+//
+// Created by server on 6/19/25.
+//
+#include "str_utils.h"
+
+#include <cstring>
+
+bool startWith(const char * str, const char ch) {
+    if (str == nullptr) return false; // Fail if str is empty
+    if (ch == 0) return false; // Fail if ch is NULL
+    if (str[0] != ch) return false; // Fail if str[0] != ch
+    return true; // str[0] == ch
+}
+
+bool contains(const char * str, const char ch) {
+    if (str == nullptr) return false; // Fail if str is null
+    if (ch == 0) return false; // Fail if ch is null
+    const size_t len = strlen(str);
+    if (len == 0) return false; // Fail if str is empty
+    for (int i = 0; i < len; i++) {
+        if (str[i] == ch) return true; // Found ch in str
+    }
+    return false; // ch is not in str
+}
+
+bool endsWith(const char * str, const char ch) {
+    if (str == nullptr) return false; // Fail if str is empty
+    if (ch == 0) return false; // Fail if ch is NULL
+    const size_t len = strlen(str);
+    if (str[len-1] != ch) return false; // Fail if str[len-1] != ch
+    return true; // str[len-1] == ch
+}

str_utils.h

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+//
+// Created by server on 6/19/25.
+//
+
+#ifndef STR_UTILS_H
+#define STR_UTILS_H
+
+bool startWith(const char* str, char ch);
+bool contains(const char* str, char ch);
+bool endsWith(const char* str, char ch);
+
+#endif //STR_UTILS_H