1 files changed, 56 insertions, 0 deletions
diff --git a/cmd/client/kill_windows.go b/cmd/client/kill_windows.go
new file mode 100644
index 0000000..ba8c75a
--- /dev/null
+++ b/cmd/client/kill_windows.go
@@ -0,0 +1,56 @@
+//go:build windows
+
+package main
+
+import (
+	"log"
+	"os"
+	"os/exec"
+	"strconv"
+	"time"
+)
+
+func killPrevious() {
+	myPID := os.Getpid()
+	log.Printf("killing previous instances (my PID: %d)", myPID)
+
+	// Kill other vpnem.exe processes (not ourselves)
+	// Use WMIC to find PIDs, then taskkill each except ours
+	out, _ := exec.Command("wmic", "process", "where",
+		"name='vpnem.exe'", "get", "processid", "/format:list").Output()
+	for _, line := range splitLines(string(out)) {
+		if len(line) > 10 && line[:10] == "ProcessId=" {
+			pidStr := line[10:]
+			pid, err := strconv.Atoi(pidStr)
+			if err == nil && pid != myPID {
+				log.Printf("killing old vpnem.exe PID %d", pid)
+				exec.Command("taskkill", "/F", "/PID", strconv.Itoa(pid)).Run()
+			}
+		}
+	}
+
+	// Kill any orphaned sing-box.exe
+	exec.Command("taskkill", "/F", "/IM", "sing-box.exe").Run()
+	time.Sleep(500 * time.Millisecond)
+}
+
+func splitLines(s string) []string {
+	var lines []string
+	start := 0
+	for i := 0; i < len(s); i++ {
+		if s[i] == '\n' || s[i] == '\r' {
+			line := s[start:i]
+			if len(line) > 0 && line[len(line)-1] == '\r' {
+				line = line[:len(line)-1]
+			}
+			if line != "" {
+				lines = append(lines, line)
+			}
+			start = i + 1
+		}
+	}
+	if start < len(s) {
+		lines = append(lines, s[start:])
+	}
+	return lines
+}