GPG: Encrypt data from pipe for certain time, then stop

If you put the timeout in the middle of the pipeline, then gpg will exit cleanly:

cat /dev/ttyACM0 | timeout ${TIMEOUT} cat | gpg -e -r ${RECIPIENT} > ${OUT_FILE}

I can't fully explain this, but I believe it is due to the way pipeline errors (signals) are handled / propagated.

Note: I've asked this question to try to understand this better.

Note that even using the following will fail:

$ timeout 5 cat < /dev/urandom | gpg -e -r ${RECIPIENT} > myfile.gpg

gpg: Terminated caught ... exiting
Terminated

Related