in reply to Re^4: What happens to a '-|' (pipe) file handle across a fork()?
in thread What happens to a '-|' (pipe) file handle across a fork()?

It is usually desirable to have the parent do initialization and validation before forking

...of which opening a pipe file handle from/to a forked sub-process arguably isn't part.

perl -le'print map{pack c,($-++?1:13)+ord}split//,ESEL'

In Section Seekers of Perl Wisdom