LS48(1)                                                   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; fol-
       lowing  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 inter-
       active  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 fol-
       lowing 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.