lib/ronin/support/cli/io_shell.rb
# frozen_string_literal: true
#
# Copyright (c) 2006-2023 Hal Brodigan (postmodern.mod3 at gmail.com)
#
# ronin-support is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published
# by the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# ronin-support 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 Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with ronin-support. If not, see <https://www.gnu.org/licenses/>.
#
module Ronin
module Support
module CLI
#
# Starts an interactive shell for the IO object,
# where data read from the IO object is printed to STDOUT and
# data read from STDIN is written to the IO object.
#
# ## Example
#
# require 'ronin/support/cli/io_shell'
#
# socket = TCPSocket.new('irc.undernet.org',6667)
# CLI::IOShell.sstart(socket)
#
# ```
# NOTICE AUTH :*** Looking up your hostname
# NOTICE AUTH :*** Checking Ident
# NOTICE AUTH :*** Found your hostname
# NOTICE AUTH :*** No ident response
# USER test_ruby * * *
# NICK test_ruby
# PING :3167790481
# PONG 3167790481
# :Chicago.IL.US.Undernet.Org 001 test_ruby :Welcome to the UnderNet IRC Network, test_ruby
# :Chicago.IL.US.Undernet.Org 002 test_ruby :Your host is Chicago.IL.US.Undernet.Org, running version u2.10.12.19
# :Chicago.IL.US.Undernet.Org 003 test_ruby :This server was created Wed Apr 15 2020 at 22:02:43 UTC
# :Chicago.IL.US.Undernet.Org 004 test_ruby Chicago.IL.US.Undernet.Org u2.10.12.19 diOoswkgx biklmnopstvrDdRcC bklov
# :Chicago.IL.US.Undernet.Org 005 test_ruby WHOX WALLCHOPS WALLVOICES USERIP CPRIVMSG CNOTICE SILENCE=25 MODES=6 MAXCHANNELS=40 MAXBANS=100 NICKLEN=12 :are supported by this server
# :Chicago.IL.US.Undernet.Org 005 test_ruby MAXNICKLEN=15 TOPICLEN=160 AWAYLEN=160 KICKLEN=160 CHANNELLEN=200 MAXCHANNELLEN=200 CHANTYPES=#& PREFIX=(ov)@+ STATUSMSG=@+ CHANMODES=b,k,l,imnpstrDdRcC CASEMAPPING=rfc1459 NETWORK=UnderNet :are supported by this server
# :Chicago.IL.US.Undernet.Org 251 test_ruby :There are 3241 users and 9182 invisible on 38 servers
# :Chicago.IL.US.Undernet.Org 252 test_ruby 57 :operator(s) online
# :Chicago.IL.US.Undernet.Org 253 test_ruby 23 :unknown connection(s)
# :Chicago.IL.US.Undernet.Org 254 test_ruby 6230 :channels formed
# :Chicago.IL.US.Undernet.Org 255 test_ruby :I have 1179 clients and 1 servers
# :Chicago.IL.US.Undernet.Org NOTICE test_ruby :Highest connection count: 1388 (1387 clients)
# :Chicago.IL.US.Undernet.Org 422 test_ruby :MOTD File is missing
# :Chicago.IL.US.Undernet.Org NOTICE test_ruby :on 1 ca 1(4) ft 10(10)
# Ctrl^D
# ```
#
class IOShell
# The IO object to interact with.
#
# @return [IO]
attr_reader :io
# The STDIN stream.
#
# @return [IO]
attr_reader :stdin
# The STDOUT stream.
#
# @return [IO]
attr_reader :stdout
#
# Initialies the IO shell object.
#
# @param [IO] io
# The IO object to interact with.
#
# @param [IO] stdin
# Alternative STDIN stream.
#
# @param [IO] stdout
# Alternative STDOUT stream.
#
def initialize(io, stdin: $stdin, stdout: $stdout)
@io = io
@stdin = stdin
@stdout = stdout
end
#
# Starts the interactive shell with the given IO object.
#
# @param [IO] io
# The IO object to interact with.
#
# @param [Hash{Symbol => Object}] kwargs
# Additional keyword arguments for {#initialize}.
#
# @option kwargs [IO] :stdin
# Optional alternative STDIN stream. Defaults to `$stdin`.
#
# @option kwargs [IO] :stdout
# Optional alternative STDOUT stream. Defaults to `$stdout`.
#
def self.start(io,**kwargs)
new(io,**kwargs).run
end
#
# Runs the interaction shell. Data read from the IO object is
# printed to STDOUT and data read from STDIN is written to the IO
# object. `Ctrl^D` or `Ctrl^C` will exit the session.
#
# @return [Boolean]
# Returns `true` if the user exited the interactive shell.
# Returns `false` if there an IOError was encountered.
#
def run
io_array = [@io, @stdin]
loop do
readable, _writable, errors = IO.select(io_array,nil,io_array)
if errors.include?(@io) || errors.include?(@stdin)
return false
end
if readable.include?(@io)
data = begin
@io.readpartial(4096)
rescue EOFError
return false
end
@stdout.write(data)
end
if readable.include?(@stdin)
data = begin
@stdin.readpartial(4096)
rescue EOFError
return true
end
@io.write(data)
end
end
rescue Interrupt
return true
end
end
end
end
end
require 'ronin/support/cli/io_shell/core_ext'