feat: create standalone native fnOS repository

app-src/internal/nginx/pid.go

@@ -0,0 +1,39 @@
+package nginx
+
+import (
+	"fmt"
+	"os"
+	"strconv"
+	"strings"
+	"time"
+)
+
+func readPIDFile(path string) (int, error) {
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return 0, err
+	}
+	pidStr := strings.TrimSpace(string(data))
+	if pidStr == "" {
+		return 0, fmt.Errorf("empty pid file")
+	}
+	pid, err := strconv.Atoi(pidStr)
+	if err != nil || pid <= 0 {
+		return 0, fmt.Errorf("invalid pid: %q", pidStr)
+	}
+	return pid, nil
+}
+
+func removePIDFile(path string) {
+	_ = os.Remove(path)
+}
+
+func waitProcessExit(pid int, timeout time.Duration) {
+	deadline := time.Now().Add(timeout)
+	for time.Now().Before(deadline) {
+		if !isPIDAlive(pid) {
+			return
+		}
+		time.Sleep(100 * time.Millisecond)
+	}
+}