Preface:
this is somewhat trivial.
Context: I was logged into a remote server, doing some
filesystem space calculations using GNU APL as my preferred
shell 'calculator', using the --eval option, while located in
a directory where writing is restricted for regular users
(here the /ext0 volume):
--
russtopia@tripe
/ext0 $ apl --eval "+/ 12 552 14 20 262 254 7.2"
1121.2
Cannot write history file .apl.history: Permission denied
---
Since
--eval seems intended to enable use of the APL interpreter
outside of any workspace, might it be better to avoid writing
to .apl.history when this flag is specified?