Implement execution with environment change.

slapos/recipe/erp5/src/slapos/recipe/erp5/__init__.py

@@ -741,6 +741,7 @@ SSLRandomSeed connect builtin
 
   def installMysqlServer(self, ip, port, database='erp5', user='user',
       test_database='test_erp5', test_user='test_user', template_filename=None):
+    backup_directory = self.createBackupDirectory('mysql')
     if template_filename is None:
       template_filename = self.getTemplateFilename('my.cnf.in')
     error_log = os.path.join(self.log_directory, 'mysqld.log')

slapos/recipe/erp5/src/slapos/recipe/erp5/execute.py

@@ -13,6 +13,16 @@ def execute(args):
 child_pg = None
 
 
+def executee(args):
+  """Portable execution with process replacement and environment manipulation"""
+  exec_list = list(args[0])
+  environment = args[1]
+  env = os.environ.copy()
+  for k,v in environment.iteritems():
+    env[k] = v
+  os.execve(exec_list[0], exec_list + sys.argv[1:], env)
+
+
 def sig_handler(signal, frame):
   print 'Received signal %r, killing children and exiting' % signal
   if child_pg is not None: