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a old pl webshell
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Main author: Florian Rossol <rossol@yola.in-berlin.de>
Thanks goes to Martin Geisler <gimpster@gimpster.com> who has written
PhpShell (http://www.gimpster.com/wiki/PhpShell).

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GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Preamble
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Appendix: How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
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convey the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) 19yy <name of author>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
Also add information on how to contact you by electronic and paper mail.
If the program is interactive, make it output a short notice like this
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Gnomovision version 69, Copyright (C) 19yy name of author
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, the commands you use may
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mouse-clicks or menu items--whatever suits your program.
You should also get your employer (if you work as a programmer) or your
school, if any, to sign a "copyright disclaimer" for the program, if
necessary. Here is a sample; alter the names:
Yoyodyne, Inc., hereby disclaims all copyright interest in the program
`Gnomovision' (which makes passes at compilers) written by James Hacker.
<signature of Ty Coon>, 1 April 1989
Ty Coon, President of Vice
This General Public License does not permit incorporating your program into
proprietary programs. If your program is a subroutine library, you may
consider it more useful to permit linking proprietary applications with the
library. If this is what you want to do, use the GNU Library General
Public License instead of this License.

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PerlWebShell 0.1
* Initial Release.
-- Florian Rossol <rossol@yola.in-berlin.de> Mon, 15 Mar 2004 22:37 +0100

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Installation instructions for PerlWebShell 0.1
Copyright (C) 2004 Florian Rossol <rossol@yola.in-berlin.de>
Copyright (C) 2000-2003 Martin Geisler <gimpster@gimpster.com>
Licensed under the GNU GPL. See the file COPYING for details.
Getting the tarball
-------------------
You can always get the latest version from here:
http://yola.in-berlin.de/perlwebshell/
Installation
------------
Installation is easy: first unpack the tarball or zipfile into the
CGI-directory of your webserver. This will create a subdirectory
called perlwebshell-0.1.
You should use some password protection for the directory of
PerlWebShell. Otherwise everybody out there can delete/modify your
files.
Bugs?
-----
If you find a bug or miss something in PerlWebShell, please don't hesitate
to mail me at <rossol@yola.in-berlin.de>!
Enjoy! - Florian Rossol <rossol@yola.in-berlin.de>

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README for PerlWebShell 0.1
Copyright (C) 2004 Florian Rossol <rossol@yola.in-berlin.de>
Copyright (C) 2000-2003 Martin Geisler <gimpster@gimpster.com>
Licensed under the GNU GPL. See the file COPYING for details.
What is PerlWebShell?
------------------
PerlWebShell is a shell wrapped in a Perl/CGI script. It's a tool you
can use to execute arbitrary shell-commands or browse the filesystem
on your remote webserver. This replaces, to a degree, a normal
telnet-connection. You can use it for transferring your site as a
compressed file, and then unpack it on the webserver, administration
and maintenance of your website using commands like ps, free, du, df
etc...
PerlWebShell is based on PhpShell
(http://www.gimpster.com/wiki/PhpShell) from Martin Geisler. In fact
it tries to be nearly the same with one little difference:
PerlWebShell uses Perl/CGI instead of PHP (not difficult to guess
cause of the name!). Also this README is based on Martins
README. Thanks Martin for releasing PhpShell under the GNU GPL.
Limitations
-----------
There are some limitations on what kind of programs you can run. It
won't do no good if you start something like Netscape or even vi. All
programs have to be strictly command-line programs, and they will have
no chance of getting user input after they have been lunched. They
probably also have to terminate within some time, depending on the
settings of your ISP.
But you can rely on all the normal shell-functionality, like pipes,
output and input redirection, etc...
Who am I?
---------
You may not be the same user when using PerlWebShell, as you are when you
upload your files with ftp. On some systems you will be 'nobody', on
other systems you will become 'httpd' or 'www-data'. This is a rather
dangerous "feature" of PerlWebShell! So use it at your own risk --- I
wont be responsible if your account is closed or something like that
happens.
How to use it
-------------
Point your browser to perlwebshell.cgi. The rest should be selfexplaining.
Download
--------
You can download PerlWebShell from http://yola.in-berlin.de/perlwebshell.

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#!/usr/bin/perl
#
# PerlWebShell 0.1
#
# PerlWebShell is an interactive CGI-script that will execute any
# command entered. See the files README and INSTALL or
# http://yola.in-berlin.de/perlwebshell/ for further information.
#
# Copyright (C) 2004 Florian Rossol <rossol@yola.in-berlin.de>
# Copyright (C) 2000-2003 Martin Geisler <gimpster@gimpster.com>
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You can get a copy of the GNU General Public License from this
# address: http://www.gnu.org/copyleft/gpl.html#SEC1
# You can also write to the Free Software Foundation, Inc., 59 Temple
# Place - Suite 330, Boston, MA 02111-1307, USA.
#
use CGI qw(:standard);
use Cwd;
use strict;
my $q = new CGI;
my $command;
my $cwd;
my $fname;
my $parent_dir;
if (param()) {
$cwd = param('cwd');
$command = param('command');
}
$cwd = getcwd() unless $cwd;
chdir $cwd or die "can't chdir";
$command = "ls -l" unless $command;
open ("COMH", "$command |") or die "can't open: $!\n";
print "Content-type: text/html\n\n";
print <<'EOHTML';
<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
EOHTML
print "<title>shell.cgi ($ENV{'SERVER_NAME'})</title>";
print <<'EOHTML';
<style type="text/css">
body {
font-family: sans-serif;
color: black;
background: white;
}
h1 {
color: red;
background: white;
}
img {
border: 0;
}
legend {
font-weight: bold;
}
</style>
</head>
<body>
EOHTML
my $abs_url = $q->url(-absolute=>1);
print h1("shell.cgi ($ENV{'SERVER_NAME'})");
print $q->start_form(-method=>"get", -action=>$abs_url);
print "<fieldset><legend>Input</legend>",
"<p>Current working directory: ";
$cwd = $cwd . "/" unless $cwd =~ /\/$/;
if ($cwd =~ /(.*)\/(.*)\//) {
$parent_dir = $1 . "/";
}
my @path = split('/', $cwd);
shift(@path);
my $tmp_path;
print "<a href=\"$abs_url?cwd=/\">root</a>/";
foreach (@path) {
$tmp_path .= $_ . "/";
print "<a href=\"$abs_url?cwd=/$tmp_path\">$_</a>/";
}
print "</p>\n";
print "<p>Choose new working directory: \n",
"<select name=\"cwd\" onchange=\"this.form.submit()\">\n";
print "<option value=\"$cwd\" selected=\"selected\">Current Directory</option>\n";
print "<option value=\"$parent_dir\">Parent Directory</option>\n";
opendir("DH", $cwd) or die "can't opendir: $!\n";
while (defined ($fname = readdir(DH))) {
next if $fname =~ /^\.+$/;
print "<option value=\"$cwd$fname/\">$fname</option>\n" if -d "$cwd/$fname";
}
print "</select></p>\n";
print q(<p>Command: <input type="text" name="command" size="60" /></p>);
#<p>Enable <code>stderr</code>-trapping? <input type="checkbox" name="stderr"
# />
print q(<input name="submit" type="submit" value="execute" /></p>);
print "</fieldset>";
print "<fieldset><legend>Output ($command)</legend>";
print q(<textarea cols="80" rows="20" readonly="readonly">) . "\n";
foreach (<COMH>) {
print $_;
}
print "</textarea></fieldset>";
print $q->end_form();
#
print <<'EOHTML';
<hr />
<address>
Copyright &copy; 2004, <a
href="mailto:rossol@yola.in-berlin.de">Florian Rossol</a>. Get the
latest version at <a
href="http://yola.in-berlin.de/perwebshell/">http://yola.in-berlin.de/perlwebshell/</a>.
</address>
<p>
<a href="http://validator.w3.org/check/referer">
<img src="http://www.w3.org/Icons/valid-xhtml10" alt="Valid XHTML 1.0 Strict!"
height="31" width="88" />
</a>
<a href="http://jigsaw.w3.org/css-validator/check/referer">
<img src="http://jigsaw.w3.org/css-validator/images/vcss"
width="88" height="31"
alt="Valid CSS!" />
</a>
</p>
EOHTML
print $q->end_html();