Here is a one-liner that I believe does what you want:
find /tmp -name something | egrepgrep '.*' The return status will be 0 when something is found, and non-zero otherwise.
If you also needEDIT: Changed from egrep '.*' to capture the output ofmuch simpler findgrep . for further processing, then Sven's answer has covered thatsince the result is the same.