Script Problem

mattydee · 12-23-2006, 04:18 PM

Hi all,

I wrote the following script to reset the connection to my home router.

Code:

wpa_cli terminate
ifconfig wlan0 up
wpa_supplicant -Dndiswrapper -iwlan0 -c/etc/wpa_supplicant.conf &
sleep 3
dhcpcd wlan0
echo "done"

Everything is fine, except it never manages to get a new dhcp assigned IP. If I open up a console, "dhcpcd wlan0" works just fine.

Any ideas as to why it doesn't work in the script?

Old_Fogie · 12-23-2006, 09:09 PM

i think you have to put the full patch of '/sbin/dhcpcd' in their.

kotnik · 12-23-2006, 09:33 PM

Increase sleep time.

Or, remove & from the end of wpa_supplicant line.

mattydee · 12-24-2006, 02:10 AM

Quote:

Originally Posted by kotnik

Increase sleep time.

Or, remove & from the end of wpa_supplicant line.

Thanks
It seems obvious now that the dhcpcd command is executing before the wpa_supplicant has finished authenticating.

However, I must have the & there, or else it won't proceed to the next command.

I will try increasing sleep to 10. I'll post back...

Thanks guys!

KleB · 12-24-2006, 05:47 AM

How about greping the output of wpa_supplicant for the line which says that it succesfully associated to the network, then write "OK" into a tempfile ... and then continuously probe if the file already has "OK" in it ... if yes then run dhcpcd?

KleB · 12-24-2006, 06:12 AM

I thought something like this:

Code:

#!/bin/bash

wpa_supplicant |grep "a_string" |sed "s/^.*a_string.*$/OK/" >/tmp/a_temp_file &

while true; do
 if [ `cat /tmp/a_temp_file` = "OK" ]; then
  dhcpcd eth2;
  break;
 fi
done

I haven't tried this, possibly some mistakes (I'm not an bash expert

and don't have wpa_supplicant on this machine), you also have to change the obvious bits of code accordingly.
I think it should work, despite being an ugly hack...

mattydee · 12-24-2006, 09:20 PM

Quote:

Originally Posted by KleB

I thought something like this:

Code:

#!/bin/bash

wpa_supplicant |grep "a_string" |sed "s/^.*a_string.*$/OK/" >/tmp/a_temp_file &

while true; do
 if [ `cat /tmp/a_temp_file` = "OK" ]; then
  dhcpcd eth2;
  break;
 fi
done

I haven't tried this, possibly some mistakes (I'm not an bash expert

and don't have wpa_supplicant on this machine), you also have to change the obvious bits of code accordingly.
I think it should work, despite being an ugly hack...

Hmm... looks like it would work. I've decided to make my life less complicated and use the wpa_gui. It seems to be working well for now. Thanks for your suggestion though.

If this helps anybody:

At first, I didn't realize that you had to give permissions for users to be able to use wpa_gui. I thought that wpa_gui just wasn't working for me.

Once I modified the /etc/wpa_supplicant.conf file to allow users in the "net" group to have access, then all users that I have put in "net" are able to use wpa_gui.

Code:

control_interface_group=net