Simplify by killing the child process on HUP? #1
Description
The fd>2 is a neat idea, but what if this tool listened for SIGHUP to detect the intention to terminate? This is conveniently produced by a closed stdin, so this straightforward commandline would return immediately:
morehup sleep 10 < /dev/null
Just asking because I looked into the topic a bit recently and your utility does seem like a missing standard tool. I found this kind of shim take a few forms in the wild, but they all seem to either wait for end of input, or SIGHUP which are usually equivalent.