Get DNS1, DNS2 addresses in openwrt

getSystemDns.py

def getSystemDns() -> tuple:
    """returns dns1, dns2 from /tmp/resolv.conf.auto
    openwrt: OpenWrt
    """
    dns1 = ""
    dns2 = ""
    try:
        with open("/tmp/resolv.conf.auto") as f:
            dnscount = 0
            for line in f.readlines():
                # print(f"line = {line}, count={dnscount}, dns1={dns1}, dns2={dns2}")
                if "nameserver" in line:
                    dnscount += 1
                    if dnscount == 1:
                        dns1 = line.split(" ")[1].strip("\n")
                        continue
                    elif dnscount == 2:
                        dns2 = line.split(" ")[1].strip("\n")
                    else:
                        # only up to 2 addresses are supported
                        break
                line = f.readline()
            line = None
    except Exception as e:
        print(f"getting dns from /tmp/resolv.conf.auto is FAILED::{e}")
    finally:
        return (dns1, dns2)