internet connection tester script

[JB]

kellyremo <kellyremo <at> zoho.com> writes:

> ... 
> Goal: if theres no internet connection, then the oneliner must loop until
> there is internet connection. if theres internet connection the oneliner
> ends.what am i missing?
> ...

Test:

1. there is internet connection to both

$ TORF=true; while $TORF; do ping -W 1 -c 1 bix.hu >& /dev/null && ping -W 1
-c 1 www.yahoo.com >& /dev/null && TORF=false || TORF=true; echo $TORF; sleep 1;
done
false
$

2. there is no internet connection to at least one

$ TORF=true; while $TORF; do ping -W 1 -c 1 www.blakstar.org >& /dev/null &&
ping -W 1 -c 1 www.yahoo.com >& /dev/null && TORF=false || TORF=true; echo
$TORF; sleep 1; done
true
true
true
true
^C
$

Nota bene !
Let's assume negation is represented by "~" sign.
~(a && b) equivalent to ~a || ~b
~(a || b) equivalent to ~a && ~b

JB