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[erebus.git] / modules / eval.py

# Erebus IRC bot - Author: Erebus Team
# vim: fileencoding=utf-8
# !EVAL and !EXEC commands, dangerous! DO NOT USE without understanding the risks!
# This file is released into the public domain; see http://unlicense.org/

# module info
modinfo = {
	'author': 'Erebus Team',
	'license': 'public domain',
	'compatible': [0],
	'depends': [],
	'softdeps': ['help'],
}

# preamble
import modlib
lib = modlib.modlib(__name__)
modstart = lib.modstart
modstop = lib.modstop

# module code
import subprocess
import sys

# import these to make life easier using this module
import os
import ctlmod

def module(name):
	return lib.mod(name)

@lib.hook('eval', needchan=False, wantchan=True, glevel=lib.OWNER)
@lib.help("<python>", "eval")
@lib.argsGE(1)
def cmd_eval(bot, user, chan, realtarget, *args):
	if chan is not None: replyto = chan
	else: replyto = user.bind_bot(bot)

	try: ret = eval(' '.join(args))
	except Exception: replyto.msg("Error: %s %s" % (sys.exc_info()[0], sys.exc_info()[1]))
	else: replyto.msg("Done: %r" % (ret,))


@lib.hook('exec', needchan=False, wantchan=True, glevel=lib.OWNER)
@lib.help("<python>", "exec")
@lib.argsGE(1)
def cmd_exec(bot, user, chan, realtarget, *args):
	if chan is not None: replyto = chan
	else: replyto = user.bind_bot(bot)

	try: exec(' '.join(args))
	except Exception: replyto.msg("Error: %s %s" % (sys.exc_info()[0], sys.exc_info()[1]))
	else: replyto.msg("Done.")

@lib.hook(needchan=False, wantchan=True, glevel=lib.OWNER)
@lib.help('<command line>', 'think os.system')
@lib.argsGE(1)
def system(bot, user, chan, realtarget, *args):
	if chan is not None: replyto = chan
	else: replyto = user.bind_bot(bot)

	try:
		proc = subprocess.Popen(' '.join(args), shell=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, close_fds=True)
	except Exception:
		replyto.msg("Error: %s %s" % (sys.exc_info()[0], sys.exc_info()[1]))
	else:
		for line in proc.stdout:
			replyto.msg(line.decode('utf-8', 'surrogateescape'))

@lib.hook('exception', needchan=False, glevel=lib.OWNER)
@lib.help(None, "cause an exception")
def cmd_exception(*args, **kwargs):
	raise Exception()

@lib.hook(needchan=False, wantchan=True, glevel=lib.ADMIN)
@lib.help("<nick> <message>", "inject a line as though it came from <nick>", "note that this injects lines, not commands", "ex: INJECT DimeCadmium !WHOAMI")
def inject(bot, user, chan, realtarget, *args):
	targetuser = bot.parent.user(args[0], create=False)
	if targetuser is None:
		bot.msg(user, "User is unknown.")
		return
	if targetuser.glevel > user.glevel:
		bot.msg(user, "That user has a higher access level than you.")
		return

	if chan is not None:
		bot.parsemsg(bot.parent.user(args[0], create=False), str(chan), ' '.join(args[1:]))
	else:
		bot.parsemsg(bot.parent.user(args[0], create=False), str(bot), ' '.join(args[1:]))