LS48(1)                    OpenBSD Reference Manual                    LS48(1)



NAME
       scsh - a Scheme shell


SYNOPSIS
       scsh [switch arg1 ... argn]


DESCRIPTION
       scsh is an implementation of the Scheme shell.  It is implemented as a
       heap image which is interpreted by the Scheme 48 virtual machine.  scsh
       is a stub program that starts the virtual machine on the scsh heap
       image.

       The scsh command loop reads Scheme expressions, evaluates them, and
       prints their results.  The Scheme 48 system is an R5RS system with many
       additional features.  It also executes commands, which are identified
       by an initial comma character.  Type the command ,help to receive a
       list of available commands, or see the documentation for Scheme 48.

       Scsh's switch argument can be one of

       -s script

       --

       Either of these switches terminates argument parsing; following
       arguments are available from scsh as the string list produced by
           (command-line-arguments)
       The -s script switch causes scsh to run in batch mode, first loading
       the script and then exiting.  The default error exception handler
       terminates the process.

       If the -s switch is not specified, scsh operates in interactive mode.
       It invokes the Scheme 48 top-level read-eval-print loop, from which the
       user can enter forms to be evaluated.  In interactive mode, the default
       error handler invokes an interactive debugging breakpoint.

       The -- switch is used to pass arguments to an interactive scsh.  It
       simply terminates argument parsing, causing following arguments to be
       bound to
           (command-line-arguments)


FILES
       /usr/local/lib/scsh/doc/
              The detailed documentation for scsh. Contains much more
              information than this broken manpage.


       /usr/local/lib/scsh/scshvm
              the virtual machine.

       /usr/local/lib/scsh/scsh.image
              the default image.

BUGS
       Too big; starts up too slowly.



                                                                       LS48(1)
