Linux cli command perlshp

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NAME 🖥️ perlshp 🖥️

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 <https://tiswww.cwru.edu/php/chet/readline/rltop.html>

AUTHOR

Hiroo Hayashi <[email protected]>

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