On 5/30/11 4:00 PM, Peter Wagner wrote:
> Hi,
>
> while i was reading some init files i stumbled upon this:
>
> /sbin/wifi detect >> /etc/config/wireless
>
> grep -qs config /etc/config/wireless && {
> /sbin/wifi up
> } || {
> rm -f /etc/config/wireless
> }
>
> this means:
>
>> /sbin/wifi detect >> /etc/config/wireless
>
> /sbin/wifi only outputs something if /etc/config/wireless doesnt exist
> but even if the files exist /etc/config/wireless modification time gets
> updated. this means even when the wifi is allready configured the modtime of
> the file gets updated everytime the system boots.
>
> i created this patch - maybe there is a better way to fix this.
I would test for the file changing with respect to the existing copy, rather
than non-zero length.
If you change out hardware, or if you had a wireless interface but now have
removed it, you don't want to retain invalid information.
I'd use "cmp -s" to compare the two files.
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