This article is from the Amiga FAQ, by Ignaz Kellerer with numerous contributions by others.
The AmigaDOS equivalent for the . representing the current directory on Unix and certain non-reentrant interrupt handlers is the empty string, which is written as "".
Example: COPY S:Startup-Sequence ""
copies your Startup-Sequence to the current directory.
There is some FD software available to patch a Unix-like interpretation of . and .. into the AmigaDOS, including, but not limited to, Martin Scott's UnixDirs. (Aminet, `os20/util/UnixDirsII.lha' or Fish-disk 837)
Arno Eigenwillig (email@example.com)