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