Fix for #8775

index 1c1e029..f43bcb1 100755
@@ -309,6 +309,11 @@ fi
 
 echo "The system will $CMD."
 
+# check if addr:port is not in use
+if [ "$CMD" == 'start' ]; then
+    python $BBBASEDIR/lib/toaster/manage.py checksocket "0.0.0.0:$WEB_PORT" || return 1
+fi
+
 # Make sure it's safe to run by checking bitbake lock
 
 lock=1

new file mode 100644
index 0000000..0399b86
@@ -0,0 +1,69 @@
+#!/usr/bin/env python
+# ex:ts=4:sw=4:sts=4:et
+# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
+#
+# BitBake Toaster Implementation
+#
+# Copyright (C) 2015 Intel Corporation
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+#
+# 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.
+
+"""Custom management command checksocket."""
+
+import errno
+import socket
+
+from django.core.management.base import BaseCommand, CommandError
+from django.utils.encoding import force_text
+
+DEFAULT_ADDRPORT = "0.0.0.0:8000"
+
+class Command(BaseCommand):
+    """Custom management command."""
+
+    help = 'Check if Toaster can listen on address:port'
+
+    def add_arguments(self, parser):
+        parser.add_argument('addrport', nargs='?', default=DEFAULT_ADDRPORT,
+                            help='ipaddr:port to check, %s by default' % \
+                                 DEFAULT_ADDRPORT)
+
+    def handle(self, *args, **options):
+        addrport = options['addrport']
+        if ':' not in addrport:
+            raise CommandError('Invalid addr:port specified: %s' % addrport)
+        splitted = addrport.split(':')
+        try:
+            splitted[1] = int(splitted[1])
+        except ValueError:
+            raise CommandError('Invalid port specified: %s' % splitted[1])
+        self.stdout.write('Check if toaster can listen on %s' % addrport)
+        try:
+            sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+            sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+            sock.bind(tuple(splitted))
+        except (socket.error, OverflowError) as err:
+            errors = {
+                errno.EACCES: 'You don\'t have permission to access port %s' \
+                              % splitted[1],
+                errno.EADDRINUSE: 'Port %s is already in use' % splitted[1],
+                errno.EADDRNOTAVAIL: 'IP address can\'t be assigned to',
+            }
+            if hasattr(err, 'errno') and err.errno in errors:
+                errtext = errors[err.errno]
+            else:
+                errtext = force_text(err)
+            raise CommandError(errtext)
+
+        self.stdout.write("OK")