You might like this proposal: https://unix.stackexchange.com/questions/197809/propose-additional-file-descriptor-stdmeta https://unix.stackexchange.com/questio

You might like this proposal: https://unix.stackexchange.com/questions/197809/propose-additional-file-descriptor-stdmeta https://unix.stackexchange.com/questions/197809/propose-addi... The idea is that some output is metadata (such as ps headers) and some is data. With stdmeta we could differentiate between the two.