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#!/usr/bin/python
#
# The Initial Developer of the Original Code is International
# Business Machines Corporation. Portions created by IBM
# Corporation are Copyright (C) 2005 International Business
# Machines Corporation. All Rights Reserved.
#
# 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
#
"""Xen security policy generation aid
"""
import os
import pwd
import grp
import sys
import getopt
import BaseHTTPServer
import CGIHTTPServer
gHttpPort = 7777
gHttpDir = '/var/lib/xensec_gen'
gLogFile = '/var/log/xen/xensec_gen.log'
gUser = 'nobody'
gGroup = 'nobody'
def usage( ):
print >>sys.stderr, 'Usage: ' + sys.argv[0] + ' [OPTIONS]'
print >>sys.stderr, ' OPTIONS:'
print >>sys.stderr, ' -p, --httpport'
print >>sys.stderr, ' The port on which the http server is to listen'
print >>sys.stderr, ' (default: ' + str( gHttpPort ) + ')'
print >>sys.stderr, ' -d, --httpdir'
print >>sys.stderr, ' The directory where the http server is to serve pages from'
print >>sys.stderr, ' (default: ' + gHttpDir + ')'
print >>sys.stderr, ' -l, --logfile'
print >>sys.stderr, ' The file in which to log messages generated by this command'
print >>sys.stderr, ' (default: ' + gLogFile + ')'
print >>sys.stderr, ' -u, --user'
print >>sys.stderr, ' The user under which this command is to run. This parameter'
print >>sys.stderr, ' is only used when invoked under the "root" user'
print >>sys.stderr, ' (default: ' + gUser + ')'
print >>sys.stderr, ' -g, --group'
print >>sys.stderr, ' The group under which this command is to run. This parameter'
print >>sys.stderr, ' is only used when invoked under the "root" user'
print >>sys.stderr, ' (default: ' + gGroup + ')'
print >>sys.stderr, ' -f'
print >>sys.stderr, ' Run the command in the foreground. The logfile option will be'
print >>sys.stderr, ' ignored and all output will be directed to stdout and stderr.'
print >>sys.stderr, ' -h, --help'
print >>sys.stderr, ' Display the command usage information'
def runServer( aServerPort,
aServerClass = BaseHTTPServer.HTTPServer,
aHandlerClass = CGIHTTPServer.CGIHTTPRequestHandler ):
serverAddress = ( '', aServerPort )
httpd = aServerClass( serverAddress, aHandlerClass )
httpd.serve_forever( )
def daemonize( aHttpDir, aLogFile, aUser, aGroup, aFork = 'true' ):
# Do some pre-daemon activities
os.umask( 027 )
if os.getuid( ) == 0:
# If we are running as root, we will change that
uid = pwd.getpwnam( aUser )[2]
gid = grp.getgrnam( aGroup )[2]
if aFork == 'true':
# Change the owner of the log file to the user/group
# under which the daemon is to run
flog = open( aLogFile, 'a' )
flog.close( )
os.chown( aLogFile, uid, gid )
# Change the uid/gid of the process
os.setgid( gid )
os.setuid( uid )
# Change to the HTTP directory
os.chdir( aHttpDir )
if aFork == 'true':
# Do first fork
try:
pid = os.fork( )
if pid:
# Parent process
return pid
except OSError, e:
raise Exception, e
# First child process, create a new session
os.setsid( )
# Do second fork
try:
pid = os.fork( )
if pid:
# Parent process
os._exit( 0 )
except OSError, e:
raise Exception, e
# Reset stdin/stdout/stderr
fin = open( '/dev/null', 'r' )
flog = open( aLogFile, 'a' )
os.dup2( fin.fileno( ), sys.stdin.fileno( ) )
os.dup2( flog.fileno( ), sys.stdout.fileno( ) )
os.dup2( flog.fileno( ), sys.stderr.fileno( ) )
def main( ):
httpPort = gHttpPort
httpDir = gHttpDir
logFile = gLogFile
user = gUser
group = gGroup
doFork = 'true'
shortOpts = 'd:p:l:u:g:fh'
longOpts = [ 'httpdir=', 'httpport=', 'logfile=', 'user=', 'group=', 'help' ]
try:
opts, args = getopt.getopt( sys.argv[1:], shortOpts, longOpts )
except getopt.GetoptError, e:
print >>sys.stderr, e
usage( )
sys.exit( )
if len( args ) != 0:
print >>sys.stderr, 'Error: command arguments are not supported'
usage( )
sys.exit( )
for opt, opt_value in opts:
if opt in ( '-h', '--help' ):
usage( )
sys.exit( )
if opt in ( '-d', '--httpdir' ):
httpDir = opt_value
if opt in ( '-p', '--httpport' ):
try:
httpPort = int( opt_value )
except:
print >>sys.stderr, 'Error: HTTP port is not valid'
usage( )
sys.exit( )
if opt in ( '-l', '--logfile' ):
logFile = opt_value
if opt in ( '-u', '--user' ):
user = opt_value
if opt in ( '-g', '--group' ):
group = opt_value
if opt in ( '-f' ):
doFork = 'false'
pid = daemonize( httpDir, logFile, user, group, doFork )
if pid > 0:
sys.exit( )
runServer( httpPort )
if __name__ == '__main__':
main( )
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