1 # -*- coding: iso-8859-1 -*-
2 # Copyright (C) 2007-2019 CEA/DEN, EDF R&D, OPEN CASCADE
4 # Copyright (C) 2003-2007 OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
5 # CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
7 # This library is free software; you can redistribute it and/or
8 # modify it under the terms of the GNU Lesser General Public
9 # License as published by the Free Software Foundation; either
10 # version 2.1 of the License, or (at your option) any later version.
12 # This library is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 # Lesser General Public License for more details.
17 # You should have received a copy of the GNU Lesser General Public
18 # License along with this library; if not, write to the Free Software
19 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 # See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
24 import os, sys, string
25 from salome_utils import getHostName
28 # -----------------------------------------------------------------------------
30 # Definition des classes d'objets pour le lancement des Server CORBA
34 """Generic class for CORBA server launch"""
36 server_launch_mode = "daemon"
42 if self.args.get('xterm'):
43 if sys.platform != "win32":
44 self.ARGS=['xterm', '-iconic', '-sb', '-sl', '500', '-hold']
46 self.ARGS=['cmd', '/c', 'start cmd.exe', '/K']
48 def __init__(self,args):
53 def set_server_launch_mode(mode):
54 if mode == "daemon" or mode == "fork":
55 Server.server_launch_mode = mode
57 raise Exception("Unsupported server launch mode: %s" % mode)
62 if self.args.get('xterm'):
63 # (Debian) send LD_LIBRARY_PATH to children shells (xterm)
64 if sys.platform == "darwin":
65 env_ld_library_path=['env', 'DYLD_LIBRARY_PATH='
66 + os.getenv("DYLD_FALLBACK_LIBRARY_PATH")]
67 myargs = myargs +['-T']+self.CMD[:1]+['-e'] + env_ld_library_path
68 elif sys.platform != "win32":
69 env_ld_library_path=['env', 'LD_LIBRARY_PATH='
70 + os.getenv("LD_LIBRARY_PATH")]
71 myargs = myargs +['-T']+self.CMD[:1]+['-e'] + env_ld_library_path
72 command = myargs + self.CMD
73 # print("command = ", command)
74 if sys.platform == "win32":
76 pid = subprocess.Popen(command).pid
77 elif Server.server_launch_mode == "fork":
78 pid = os.spawnvp(os.P_NOWAIT, command[0], command)
79 else: # Server launch mode is daemon
80 pid=self.daemonize(command)
82 #store process pid if it really exists
83 process_id[pid]=self.CMD
87 def daemonize(self,args):
88 # to daemonize a process need to do the UNIX double-fork magic
89 # see Stevens, "Advanced Programming in the UNIX Environment" for details (ISBN 0201563177)
90 # and UNIX Programming FAQ 1.7 How do I get my program to act like a daemon?
91 # http://www.erlenstar.demon.co.uk/unix/faq_2.html#SEC16
93 c2pread, c2pwrite = os.pipe()
99 #receive real pid from child
100 data=os.read(c2pread,24) #read 24 bytes
101 os.waitpid(pid,0) #remove zombie
103 # return : first parent
114 # decouple from parent environment
118 # do second fork : second child not a session leader
122 #send real pid to parent
124 os.write(c2pwrite,pid_str.encode())
126 # exit from second parent
129 print("fork #2 failed: %d (%s)" % (e.errno, e.strerror), file=sys.stderr)
130 os.write(c2pwrite,"-1")
135 os.close(0) #close stdin
136 os.open("/dev/null", os.O_RDWR) # redirect standard input (0) to /dev/null
138 os.execvp(args[0], args)
140 print("(%s) launch failed: %d (%s)" % (args[0],e.errno, e.strerror), file=sys.stderr)