Author: Unknown
Subject: heredoc
Date: Monday, 16 Nov 2020, 16:15:43

When implementing heredocs, do we need to execute each line on the heredoc? For example, if we have:

VALUE=1 cat << EOF
> hello: $VALUE
> LINE2
> LINE3, printenv VALUE
> EOF

does $VALUE and printenv VALUE get expanded before being put into a temporary file and being made the stdin of cat?