You probably shouldn't rely on textual output of a command to decide this, especially when the ping
command gives you a perfectly good return value:
The ping utility returns an exit status of zero if at least one response was heard from the specified host; a status of two if the transmission was successful but no responses were received; or another value from
<sysexits.h>
if an error occurred.
In other words, use something like:
((count = 100)) # Maximum number to try.
while [[ $count -ne 0 ]] ; do
ping -c 1 8.8.8.8 # Try once.
rc=$?
if [[ $rc -eq 0 ]] ; then
((count = 1)) # If okay, flag to exit loop.
fi
((count = count - 1)) # So we don't go forever.
done
if [[ $rc -eq 0 ]] ; then # Make final determination.
echo `say The internet is back up.`
else
echo `say Timeout.`
fi