EDITOR
The editor to use instead of vi(1).
Edit the group file
vigr [-d
directory]
The vigr utility makes a temporary copy of the group file, allows the user to edit it, then verifies that the edited file is valid before installing it.
The following options are available:
-d directory
Edit the group file in the specified directory instead of the default /etc/group.
EDITOR
The editor to use instead of vi(1).
TMPDIR
The directory in which to store the temporary copy of the group file.
27 releases since FreeBSD 10.3-RELEASE; the text changed 13 times.