pandoc

File Read

Context: sudo, suid, unprivileged

pandoc -t plain /path/to/input-file

File Write

Context: sudo, suid, unprivileged

echo DATA | pandoc -t plain -o /path/to/output-file

Inherit

Context: sudo, suid, unprivileged

echo '...' >/path/to/temp-file
pandoc -L /path/to/temp-file /dev/null