import os

def open_all():
	"""open_all() → [file(rb)]
	Open the default sshwot files"""

	try:
		homedir = os.environ['HOME']
	except KeyError as err:
		raise KeyError('$HOME is not set') from err

	# If the directory doesn't exist, just return empty
	try:
		sshwot_dir = os.listdir(os.path.join(homedir, '.sshwot'))
	except FileNotFoundError:
		return []

	# Read all the .sshwot files from /.sshwot by default
	files = []
	for dir_entry in sshwot_dir:
		if dir_entry.split('.')[-1] == 'sshwot':
			files.append(open(dir_entry, 'rb'))

	return files