wait but kill if a max. time was exceeeded

[Gorka Lertxundi]

I have a very simple question, is it possible in execline to wait up to a
maximum amount of time to finish a background program execution? And if it
didn't finish, kill it forcibly?

Something like this:

background
{
  whatever...
}
wait -t ${MAX_TIME} { ${!} }
foreground { kill -9 ${i} }
prog

Or how can I achieve this behaviour?

Thanks!