Re: nslu2: two devices: one by default

[Xan <dxpublica@telefonica.net>]

En/na Xan ha escrit:
> How to use ip link for seeing if eth0 is plugged ? ip link show eth0 
> gets me lot of output. cable unplugged==NO-CARRIER???
>
> Thanks a lot,
> Xan.
Yes. This:

#!/usr/bin/env python
# This script see if eth0 cable is plugged or unplugged
# and prints the corresponding output in a file.
import subprocess
from time import strftime, localtime

# Global variables
now = strftime("%a, %d %b %Y %H:%M:%S +0000", localtime()) # get the 
local time
eth0_cmd = "ip link show eth0" # command for showing the state of eth0 
device
wifi_cmd = "ip link show wlan0" # command for showing the state of wlan0 
device
filepath = "/home/xan/script-per-cable-xarxa/log.txt" # the path of the 
log file

f = open(filepath, 'a') # open file for appending lines

# See if eth0 cable is plugged
p_eth0 = subprocess.Popen(eth0_cmd, shell=True,stdout=subprocess.PIPE) # 
run eth0_cmd
out_eth0 = p_eth0.stdout.read().strip() # catch the output
if out_eth0.find('NO-CARRIER') != -1:
     f.write("eth0 cable unplugged: " + now + "\n") # if no-carrier is 
present, then cable is unplugged
else:
     f.write("eth0 cable plugged: " + now + "\n") # if no find, then 
cable is plugged


[The source is in: 
http://github.com/somenxavi/misc/blob/master/cable-check.py]

script serves as example. You could modify for modifying the route table 
if eth0 cable is plugged or not.
I add this script in crontab (crontab -e and then put
* * * * * /usr/bin/python /home/xan/script-per-cable-xarxa/cable.py) for 
running that minutely.

Thanks a lot all of you and, overall, Lennart for your help. When I have 
modified script that modify routing table I will post it.

Xan.