feat(watchdog): add auto boot up for watchdog progress

.gitignore

@@ -17,6 +17,7 @@
 # https://github.com/github/gitignore/blob/main/community/Golang/Go.AllowList.gitignore
 #
 # Binaries for programs and plugins
+.gocache/
 *.exe
 *.exe~
 *.dll

watchdog/keepalive.go

@@ -0,0 +1,2 @@
+package watchdog
+

watchdog/tcpClient.go

@@ -4,7 +4,14 @@ import (
 	"bufio"
 	"fmt"
 	"net"
+	"os"
+	"os/exec"
+	"path/filepath"
 	"strings"
+	"super-frpc/global"
+	"super-frpc/sys"
+	"super-frpc/utils"
+	"super-frpc/postLog"
 	"sync"
 	"time"
 )
@@ -19,9 +26,20 @@ var (
 )
 
 func Init() error {
+	if global.CurrentConfig.Watchdog.Enabled {
+		if err := ensureWatchdogProcess(); err != nil {
+			postLog.Error(fmt.Sprintf("Failed to boot watchdog program: %v", err))
+			return err
+		}
+	}
+
 	tcpConnMutex.Lock()
 	defer tcpConnMutex.Unlock()
 
+	if recvChan != nil || stopRecvChan != nil {
+		return nil
+	}
+
 	if tcpConn != nil {
 		return fmt.Errorf("TCP client already initialized")
 	}
@@ -33,6 +51,86 @@ func Init() error {
 	return nil
 }
 
+func ensureWatchdogProcess() error {
+	watchdogName, err := getWatchdogBinaryName()
+	if err != nil {
+		return err
+	}
+
+	if isWatchdogProcessRunning(watchdogName) {
+		postLog.Info(fmt.Sprintf("Watchdog process %s is already running, skipping initialize...", watchdogName))
+		return nil
+	}
+	postLog.Info(fmt.Sprintf("Watchdog process %s is not running, starting it...", watchdogName))
+
+	watchdogPath := filepath.Join(".", "watchdog", watchdogName)
+	if !utils.IsFileExist(watchdogPath) {
+		return fmt.Errorf("watchdog binary not found: %s", watchdogPath)
+	}
+
+	cmd := exec.Command(watchdogPath)
+	devNull, err := os.OpenFile(os.DevNull, os.O_RDWR, 0)
+	if err != nil {
+		return fmt.Errorf("failed to open null device: %w", err)
+	}
+	defer devNull.Close()
+
+	cmd.Stdin = devNull
+	cmd.Stdout = devNull
+	cmd.Stderr = devNull
+	configureWatchdogCommand(cmd)
+
+	if err := cmd.Start(); err != nil {
+		return fmt.Errorf("failed to start watchdog process %s: %w", watchdogPath, err)
+	}
+
+	return nil
+}
+
+func getWatchdogBinaryName() (string, error) {
+	switch sys.GetInitSystem() {
+	case "systemd":
+		return "watchdog_systemd", nil
+	case "init.d":
+		return "watchdog_initd", nil
+	case "windows":
+		if utils.IsFileExist(filepath.Join(".", "watchdog", "watchdog_windows.exe")) {
+			return "watchdog_windows.exe", nil
+		}
+		return "watchdog_windows", nil
+	default:
+		return "", fmt.Errorf("unsupported init system: %s", sys.GetInitSystem())
+	}
+}
+
+func isWatchdogProcessRunning(watchdogName string) bool {
+	switch sys.GetInitSystem() {
+	case "windows":
+		cmd := exec.Command("tasklist", "/FI", fmt.Sprintf("IMAGENAME eq %s", watchdogName))
+		output, err := cmd.CombinedOutput()
+		if err != nil {
+			return false
+		}
+		outputStr := strings.ToLower(string(output))
+		return strings.Contains(outputStr, strings.ToLower(watchdogName)) && !strings.Contains(outputStr, "no tasks are running")
+	case "systemd", "init.d":
+		cmd := exec.Command("ps", "-A", "-o", "comm=")
+		output, err := cmd.CombinedOutput()
+		if err != nil {
+			return false
+		}
+
+		for _, line := range strings.Split(string(output), "\n") {
+			if strings.TrimSpace(line) == watchdogName {
+				return true
+			}
+		}
+		return false
+	default:
+		return false
+	}
+}
+
 func tcpConnect(ipaddr string, port int) error {
 	tcpConnMutex.Lock()
 	defer tcpConnMutex.Unlock()

watchdog/watchdog_build_linux.go

@@ -0,0 +1,8 @@
+//go:build linux
+
+package watchdog
+
+import "os/exec"
+
+func configureWatchdogCommand(cmd *exec.Cmd) {
+}

watchdog/watchdog_build_windows.go

@@ -0,0 +1,12 @@
+//go:build windows
+
+package watchdog
+
+import (
+	"os/exec"
+	"syscall"
+)
+
+func configureWatchdogCommand(cmd *exec.Cmd) {
+	cmd.SysProcAttr = &syscall.SysProcAttr{HideWindow: true}
+}