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perlsh(1p)


NAME

   perlsh - one-line perl evaluator with line editing function and
   variable name completion function

SYNOPSIS

     perlsh

DESCRIPTION

   This program reads input a line, and evaluates it by perl interpreter,
   and prints the result.  If the result is a list value then each value
   of the list is printed line by line.  This program can be used as a
   very strong calculator which has whole perl functions.

   This is a sample program Term::ReadLine::Gnu module.  When you input a
   line, the line editing function of GNU Readline Library is available.
   Perl symbol name completion function is also available.

   Before invoking, this program reads ~/.perlshrc and evaluates the
   content of the file.

   When this program is terminated, the content of the history buffer is
   saved in a file ~/.perlsh_history, and it is read at next invoking.

VARIABLES

   You can customize the behavior of "perlsh" by setting following
   variables in ~/.perlshrc;

   $PerlSh::PS1
       The primary prompt string.  The following backslash-escaped special
       characters can be used.

               \h: host name
               \u: user name
               \w: package name
               \!: history number

       The default value is `"\w[\!]$ "'.

   $PerlSh::PS2
       The secondary prompt string.  The default value is `"> "'.

   $PerlSh::HISTFILE
       The name of the file to which the command history is saved.  The
       default value is "~/.perlsh_history".

   $PerlSh::HISTSIZE
       If not "undef", this is the maximum number of commands to remember
       in the history.  The default value is 256.

   $PerlSh::STRICT
       If true, restrict unsafe constructs.  See "use strict" in perl man
       page.  The default value is 0;

FILES

   ~/.perlshrc
       This file is eval-ed at initialization.  If a subroutine
       "afterinit" is defined in this file, it will be eval-ed after
       initialization.  Here is a sample.

               # -*- mode: perl -*-
               # decimal to hexa
               sub h { map { sprintf("0x%x", $_ ) } @_;}

               sub tk {
                   $t->tkRunning(1);
                   use Tk;
                   $mw = MainWindow->new();
               }

               # for debugging Term::ReadLine::Gnu
               sub afterinit {
                   *t = \$PerlSh::term;
                   *a = \$PerlSh::attribs;
               }

   ~/.perlsh_history
   ~/.inputrc
       A initialization file for the GNU Readline Library.  Refer its
       manual for details.

SEE ALSO

   Term::ReadLine::Gnu <http://search.cpan.org/dist/Term-ReadLine-Gnu/>

   GNU Readline Library
   <http://cnswww.cns.cwru.edu/php/chet/readline/rltop.html>

AUTHOR

   Hiroo Hayashi <hiroo.hayashi@computer.org>



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