%get-env-var
%os-process-id
%shell-command
*bourne-compatible-shell*
variable
*os-alist*
variable
*shell-search-paths*
variable
close-stream-specifier
directory-pathname-p
file-to-string-as-lines
get-env-var
host-os
make-stream-from-specifier
os-process-id
shell-command
with-gensyms
with-input
with-output
with-stream-from-specifier