The hush shell for GNO
======================

This is a port of the hush shell to the GNO multitasking environment for the
Apple IIgs.  Hush is a Bourne/POSIX-style shell that was originally part
of BusyBox.  In general, it implements most of the features you would expect,
although there are a few missing ones (such as tilde expansion and aliases).

Supported features include:
* if/then/elif/else/fi conditionals
* for/in/do/done loops
* while loops
* case/esac
* functions
* redirections (including specifying file descriptors)
* here documents
* arithmetic with `$((...))`
* command substitution with backticks or `$(...)`
* glob pattern expansion (including globbing across multiple directory levels)
* command line editing with history and tab completion
* job control
* and much more...


Installation
------------
To use hush, you need GNO 2.0.6.  Just copy the "hush" binary to a suitable
location. (You may want to install it as /bin/sh to support portable scripts
that expect a Bourne-type shell in that location).

To build it, you also need ORCA/C 2.1.x and plenty of memory (8MB is enough).
Run `make` or (if the source files don't have correct filetypes) `./build.gs`.
You should also be able to build it on modern *nix systems by running `make`,
although this is meant mainly for testing purposes.


GNO-specific notes and known issues
-----------------------------------
* $PATH is expected to be in the usual GNO format (searched backwards, with 
  spaces as separators).

* File descriptors 0, 1, and 2 appearing in shell operations like redirections
  are translated to 1, 2, and 3, respectively.  This maintains compatibility
  with Unix shell scripts that expect these to be stdin, stdout, and stderr.

* Glob expansion doesn't work with patterns containing : directory separators.
  Use / separators instead.

* Hush currently crashes when used interactively in TMTerm or GSI (scripts 
  should work, though).


License
-------
Hush is licensed under the GNU General Public License version 2, contained in
the file LICENSE.  Some individual source files contain code licensed under 
other GPL-compatible permissive licenses.  See the individual source files for
full licensing details and copyright notices.

The compiled hush binary also contains code from the ORCA/C runtime libraries,
to which the following notice applies:

This program contains material from the ORCA/C Run-Time Libraries, 
copyright 1987-1996 by Byte Works, Inc. Used with permission.