package licence

import (
	"fmt"
	"io/ioutil"
	"time"
	"syscall"
)

func GetOSInstallationDate() int64{
	fileSystemCreateTime := time.Now().Unix()

	fileSystemDir := "/etc"

	fileInfoList, err := ioutil.ReadDir(fileSystemDir)
	if err != nil {
		fmt.Println(err)
	}

	for i := range fileInfoList {
		stat_t := fileInfoList[i].Sys().(*syscall.Stat_t)
		if stat_t.Ctim.Sec < fileSystemCreateTime{
			fileSystemCreateTime = stat_t.Ctim.Sec
		}
	}

	return fileSystemCreateTime
}