/usr/lib/python2.7/dist-packages/lbserver/utils.py is in ltsp-cluster-lbserver 2.0.0-0ubuntu5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 | # -*- coding: utf-8 -*-
#
# $Revision: 1.64 $
# $Date: 2005/09/26 19:58:43 $
# $Author: dwelch $
#
# (c) Copyright 2001-2005 Hewlett-Packard Development Company, L.P.
#
# 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; either version 2 of the License, or
# (at your option) any later version.
#
# 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# Author: Don Welch
#
# Thanks to Henrique M. Holschuh <hmh@debian.org> for various security patches
#
from __future__ import generators
# Std Lib
import sys, os, fnmatch, tempfile, socket, struct, select, time
import fcntl, errno, stat, string, xml.parsers.expat, commands
# Local
#from g import *
#from codes import *
# For pidfile locking (must be "static" and global to the whole app)
prv_pidfile = None
prv_pidfile_name = ""
def get_pidfile_lock ( a_pidfile_name="" ):
""" Call this to either lock the pidfile, or to update it after a fork()
Credit: Henrique M. Holschuh <hmh@debian.org>
"""
global prv_pidfile
global prv_pidfile_name
if prv_pidfile_name == "":
try:
prv_pidfile_name = a_pidfile_name
prv_pidfile = os.fdopen(os.open(prv_pidfile_name, os.O_RDWR | os.O_CREAT, 0644), 'r+')
fcntl.fcntl(prv_pidfile.fileno(), fcntl.F_SETFD, fcntl.FD_CLOEXEC)
while 1:
try:
fcntl.flock(prv_pidfile.fileno(), fcntl.LOCK_EX | fcntl.LOCK_NB)
except (OSError, IOError), e:
if e.errno == errno.EINTR:
continue
elif e.errno == errno.EWOULDBLOCK:
try:
prv_pidfile.seek(0)
otherpid = int(prv_pidfile.readline(), 10)
sys.stderr.write ("can't lock %s, running daemon's pid may be %d\n" % (prv_pidfile_name, otherpid))
except (OSError, IOError), e:
sys.stderr.write ("error reading pidfile %s: (%d) %s\n" % (prv_pidfile_name, e.errno, e.strerror))
sys.exit(1)
sys.stderr.write ("can't lock %s: (%d) %s\n" % (prv_pidfile_name, e.errno, e.strerror))
sys.exit(1)
break
except (OSError, IOError), e:
sys.stderr.write ("can't open pidfile %s: (%d) %s\n" % (prv_pidfile_name, e.errno, e.strerror))
sys.exit(1)
try:
prv_pidfile.seek(0)
prv_pidfile.write("%d\n" % (os.getpid()))
prv_pidfile.flush()
prv_pidfile.truncate()
except (OSError, IOError), e:
log.error("can't update pidfile %s: (%d) %s\n" % (prv_pidfile_name, e.errno, e.strerror))
def daemonize ( stdin='/dev/null', stdout='/dev/null', stderr='/dev/null' ):
"""
Credit: Jürgen Hermann, Andy Gimblett, and Noah Spurrier
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/66012
Proper pidfile support: Henrique M. Holschuh <hmh@debian.org>
"""
# Try to lock pidfile if not locked already
if prv_pidfile_name != '' or prv_pidfile_name != "":
get_pidfile_lock( prv_pidfile_name )
# Do first fork.
try:
pid = os.fork()
if pid > 0:
sys.exit(0) # Exit first parent.
except OSError, e:
sys.stderr.write ("fork #1 failed: (%d) %s\n" % (e.errno, e.strerror) )
sys.exit(1)
# Decouple from parent environment.
os.chdir("/")
os.umask(0)
os.setsid()
# Do second fork.
try:
pid = os.fork()
if pid > 0:
sys.exit(0) # Exit second parent.
except OSError, e:
sys.stderr.write ("fork #2 failed: (%d) %s\n" % (e.errno, e.strerror) )
sys.exit(1)
if prv_pidfile_name != "":
get_pidfile_lock()
# Now I am a daemon!
# Redirect standard file descriptors.
si = file(stdin, 'r')
so = file(stdout, 'a+')
se = file(stderr, 'a+', 0)
os.dup2(si.fileno(), sys.stdin.fileno())
os.dup2(so.fileno(), sys.stdout.fileno())
os.dup2(se.fileno(), sys.stderr.fileno())
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