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teranex is offline teranex
2010-05-28 , 09:28
Posts: 18 | Thanked: 0 times | Joined on Jan 2010
#1
Yesterday I installed alarmed (from extras-dev). Now i'd like to use it, amongst other things, to let gPodder download new podcasts at night.
I already found out that i can do this with
Code:
gpo update && gpo download
However, since i have a very limited 3G plan, i'd like to add a check to make sure that this is only executed when connected to wi-fi. Could somebody point me in the right direction on how i can check this? The only thing i can come up with is to do something like
Code:
sudo ifconfig wlan0 | grep <something>
to check if the wlan0 interface has an ip-address, but that seems rather hackish to me.

thx!
 
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calvin_42 is offline calvin_42
2010-05-28 , 09:35
Posts: 286 | Thanked: 219 times | Joined on Feb 2010 @ France
#2
Code:
[[ -n `cat /proc/net/route | grep wlan0` ]] && gpo update && gpo download
should work pretty good.
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teranex is offline teranex
2010-05-31 , 09:52
Posts: 18 | Thanked: 0 times | Joined on Jan 2010
#3
Originally Posted by calvin_42 View Post
Code:
[[ -n `cat /proc/net/route | grep wlan0` ]] && gpo update && gpo download
should work pretty good.
You command seems to always return true and execute the second command. However by reading about the '-n ' in bash, i came up with the following which seems to work:

Code:
test=`cat /proc/net/route | grep wlan0`
[[ -n "$test" ]] && gpo update && gpo download
Thx for the help!
 
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