I am being suggested to do away with sudo dependency to run the
backend with root privileges. I will modify the frontend's code to run
the backend without sudo, but this will require one to use change the
backend's SUID to that of root.

Today, if my concentration permits, I will try to add support for eth0
and add code to display the device nodes in the list box. I can also
add support for eth1 and wlan1, but this in my opinion is an overkill
as mobile computers do not usually have more than one wired
connection.

On 26/08/2015, Isaac Dunham <ibid.ag@???> wrote:
> On Tue, Aug 25, 2015 at 10:35:21PM +0200, Irrwahn wrote:
>> On Tue, 25 Aug 2015 21:16:08 +0100, Edward Bartolo wrote:
>> > The contents of interfaces files created by backend are as follows,
>> > but if necessary, we can create more than more template, although it
>> > doesn't look it will be necessary.
>> >
>> > Interfaces File Contents:
>> >
>> > auto lo
>> > iface lo inet loopback
>> >
>> > iface wlan0 inet dhcp
>> > wpa-ssid EB-TP-LNK67
>> > wpa-psk "************"
>>
>> <snip>
>>
>> And that's exactly crunchpoint: How is the wpa-ssid line
>> processed by ifup, and does it accept the P"xyz\x0Ablah"
>> syntax used by wpa-supplicant?
>
> It is exported as IF_WPA_SSID in the environment passed to
> /etc/network/if-*.d/*.
> /etc/network/if-*.d/wpasupplicant sources a file that sources
> /etc/wpa_supplicant/functions.sh, which runs quoted strings through
> echo/sed, then passes the value of IF_WPA_SSID as an argument to
> wpa_cli_do, which is a shell function that calls wpa_cli.
> I have no idea whether the \ escapes hold up to all that, but as long as
> you have them adequately escaped, they do not need a different format for
> quoting.
>
> HTH,
> Isaac Dunham
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