mmgen-wallet/mmgen/main.py

#!/usr/bin/env python3
#
# mmgen = Multi-Mode GENerator, command-line Bitcoin cold storage solution
# Copyright (C)2013-2020 The MMGen Project <mmgen@tuta.io>
#
# 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 3 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
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

"""
main.py - Script launcher for the MMGen suite
"""

def launch(mod):

	if mod in ('walletgen','walletchk','walletconv','passchg','subwalletgen','seedsplit'):
		mod = 'wallet'
	if mod == 'keygen': mod = 'addrgen'

	import sys,os
	from .globalvars import g

	if g.platform == 'linux' and sys.stdin.isatty():
		import termios,atexit
		fd = sys.stdin.fileno()
		old = termios.tcgetattr(fd)
		atexit.register(lambda: termios.tcsetattr(fd,termios.TCSADRAIN,old))

	try:
		__import__('mmgen.main_' + mod)
	except KeyboardInterrupt:
		sys.stderr.write('\nUser interrupt\n')
		sys.exit(1) # must exit normally so exit handlers will be called
	except EOFError:
		sys.stderr.write('\nEnd of file\n')
	except Exception as e:
		if os.getenv('MMGEN_TRACEBACK'):
			raise
		else:
			try: m = '{}'.format(e.args[0])
			except: m = repr(e.args[0])

			from .util import die,ydie,rdie
			d = [   (ydie,2,'\nMMGen Unhandled Exception ({n}): {m}'),
					(die, 1,'{m}'),
					(ydie,2,'{m}'),
					(ydie,3,'\nMMGen Error ({n}): {m}'),
					(rdie,4,'\nMMGen Fatal Error ({n}): {m}')
				][e.mmcode if hasattr(e,'mmcode') else 0]

			d[0](d[1],d[2].format(n=type(e).__name__,m=m))