arc-mode.el) is the Emacs builtin mode for viewing and editing the contents of archive files like
.zoo, etc. See arc for the basics.
.tar files are handled by TarMode, which is slightly different.
New archive types can be added to
archive-mode without too much trouble. The builtin modes usually look at the file directly to get the contents, but run an external program to make changes. Have a look at for instance
Note about file extraction to the file system:
archive-modecannot extract a file in an archive to the file system (with the timestamp in the archive), only to a buffer for viewing (and when you save the buffer to the file system you obviously do not get the correct timestamp from the archive).
Question to the topic above: Does anybody know of an arc-mode replacement, which enables extraction to the file system?
Note about archive-mode for emacs within the cygwin environment: