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#!/usr/bin/env python3
#
# Copyright (C) 2014-2019 Codethink Limited
#
# 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; version 2 of the License.
#
# 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, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
'''Wait for a given port to be open.
WARNING: This may wait for quite a long time. There is no timeout. Or
spoon.
'''
import sys, socket, errno
host = sys.argv[1]
port = int(sys.argv[2])
while True:
print("Trying %s port %s" % (host, port))
s = socket.socket()
try:
s.connect((host, port))
except socket.error as e:
if e.errno == errno.ECONNREFUSED:
continue
raise
s.close()
break
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