rename-if.py.bak

#!/usr/bin/env python3

import re
import json
import subprocess
from subprocess import Popen
from subprocess import PIPE

# get ifaces with "ip" command
ip_cmd = Popen(["ip","-details", "-json", "link"], stdout=PIPE, stderr=PIPE, universal_newlines=True)
out, err = ip_cmd.communicate()
ifaces = json.loads(out)
iface_addrs = []

new_ifaces = {}

for iface in ifaces:
    if iface["link_type"] not in ["ether"]:
        continue

    # get name and mac address
    addr = iface.get("permaddr") if iface.get("permaddr") is not None else iface.get("address")
    name = iface.get("ifname")

    # get iface link speed (via supported link modes)
    p2 = Popen(["ethtool", name], stdout=PIPE, stderr=PIPE, universal_newlines=True)
    out2, err2 = p2.communicate()
    slm = "Supported link modes:"
    slm_idx = out2.find(slm) + len(slm)
    slm_dirty = out2[slm_idx:].strip().split()
    slm_pattern = re.compile("^([0-9].*)/(Full)?(Half)?$")
    max_speed = 0
    for slm in slm_dirty:
        if slm_pattern.match(slm):
            speed = int(re.findall(r'\d+', slm)[0])
            max_speed = max(max_speed, speed)
    gbps_speed = str(max_speed / 1000)
    gbps_speed = gbps_speed[:gbps_speed.find(".")] if int(gbps_speed.split('.')[1]) == 0 else gbps_speed
    gbps_speed = gbps_speed + "Gb"
    print("IFACE", name, addr, gbps_speed)
    if gbps_speed not in new_ifaces:
        new_ifaces[gbps_speed] = []
    new_ifaces[gbps_speed].append((addr, name))

new_ifaces["2.5Gb"].append(('b4:2e:99:ab:39:a7', 'enp9s0'))
new_ifaces["0Gb"].append(('b4:2e:99:ab:39:a2', 'enp4s0'))

# generate new iface names
for iface_speed in new_ifaces.keys():
    new_ifaces[iface_speed].sort()
    for i, iface in enumerate(new_ifaces[iface_speed]):
        if iface[1].startswith("wl"):
            new_ifname = "wlan" + str(i)
        else:
            new_ifname = "eth" + iface_speed + str(i)
        # print(new_ifname)
        print("renaming " + iface[1] + " (" + iface[0] + ") to " + new_ifname)