In this answer on SO, I gave an example that should have used a -SIGCONT signal in a job submitted to at. However, I found that the process that I had stopped with -SIGSTOP did not continue. When I changed the signal to the numeric value, it worked.
echo "kill -18 $rspid"|at now + 2 minutes
It's a bad idea to use the numeric value because it can be different on different systems.
How can I submit this job with a symbolic signal (-SIGCONT) instead of the numeric one (-18)?