sbin/ifupdown

   1 #!/usr/bin/python
   2
   3 import sys
   4 import os
   5 import re
   6 import argparse
   7 from ifupdown.ifupdownmain import *
   8
   9 import logging
  10
  11 lockfile="/run/network/.lock"
  12 logger = None
  13
  14 def run(args, op):
  15     logger.debug('args = %s' %str(args))
  16
  17     try:
  18         iflist = args.iflist
  19         if len(args.iflist) == 0:
  20             iflist = None
  21
  22         cachearg=False if iflist is not None or args.nocache == True else True
  23         logger.debug('creating ifupdown object ..')
  24         if op == 'up' or op == 'down' or op == 'reload':
  25             ifupdown_handle = ifupdownMain(force=args.force,
  26                                             nodepends=args.nodepends,
  27                                             perfmode=args.perfmode,
  28                                             njobs=args.jobs,
  29                                             dryrun=args.noact,
  30                                             cache=cachearg)
  31         elif op == 'query':
  32             ifupdown_handle = ifupdownMain(nodepends=args.nodepends,
  33                                             perfmode=args.perfmode,
  34                                             njobs=args.jobs,
  35                                             format=args.format,
  36                                             cache=cachearg)
  37
  38         logger.debug('calling %s' %op + ' for all interfaces ..')
  39         if op == 'up':
  40             ifupdown_handle.up(args.all, args.CLASS, iflist,
  41                                excludepats=args.excludepats,
  42                                printdependency=args.printdependency)
  43         elif op == 'down':
  44             ifupdown_handle.down(args.all, args.CLASS, iflist,
  45                                  excludepats=args.excludepats)
  46         elif op == 'query':
  47             if args.checkcurstate == True:
  48                 qtype='query-checkcurr'
  49             elif args.presumedstate == True:
  50                 qtype='query-presumed'
  51             elif args.presumedstatedetailed == True:
  52                 qtype='query-presumeddetailed'
  53             elif args.runningstate == True:
  54                 if iflist is None:
  55                     iflist = [i for i in os.listdir('/sys/class/net/')
  56                               if os.path.isdir('/sys/class/net/%s' %i) == True]
  57                     print iflist
  58                 qtype='query-running'
  59             else:
  60                 qtype='query'
  61
  62             ifupdown_handle.query(qtype, args.all, args.CLASS, iflist,
  63                                   excludepats=args.excludepats)
  64         elif op == 'reload':
  65             if iflist is not None:
  66                 raise Exception('iflist is currently not supported with reload')
  67
  68             ifupdown_handle.reload(args.all, args.CLASS, iflist,
  69                                excludepats=args.excludepats)
  70     except:
  71         raise
  72
  73 def init(args):
  74     global logger
  75
  76     log_level = logging.WARNING
  77
  78     if args.verbose == True:
  79         log_level = logging.INFO
  80
  81     if args.debug == True:
  82         log_level = logging.DEBUG
  83
  84     try:
  85         logging.basicConfig(level=log_level,
  86             format='%(levelname)s: %(message)s')
  87         logger = logging.getLogger('ifupdown')
  88     except:
  89         raise
  90
  91
  92 def deinit():
  93     {}
  94
  95 def update_argparser(argparser):
  96     """ base parser """
  97     argparser.add_argument('iflist', metavar='IFACE',
  98                 nargs='*', help='interfaces list')
  99     argparser.add_argument('-v', '--verbose', dest='verbose',
 100                 action='store_true', help='verbose')
 101     argparser.add_argument('-d', '--debug', dest='debug',
 102                 action='store_true',
 103                 help='output debug info')
 104     argparser.add_argument('-q', '--quiet', dest='quiet',
 105                 action='store_true',
 106                 help=argparse.SUPPRESS)
 107     argparser.add_argument('--allow', dest='CLASS',
 108                 help='ignore non-\"allow-CLASS\" interfaces')
 109     argparser.add_argument('--nodepends', dest='nodepends',
 110                 action='store_true', help=argparse.SUPPRESS)
 111     argparser.add_argument('--perfmode', dest='perfmode',
 112                 action='store_true', help=argparse.SUPPRESS)
 113     argparser.add_argument('-j', '--jobs', dest='jobs', type=int,
 114                 default=-1, choices=range(1,12), help=argparse.SUPPRESS)
 115     argparser.add_argument('--nocache', dest='nocache', action='store_true',
 116                 help=argparse.SUPPRESS)
 117     argparser.add_argument('--print-dependency',
 118                 dest='printdependency', choices=['list', 'dot'],
 119                 help=argparse.SUPPRESS)
 120     argparser.add_argument('-X', '--exclude', dest='excludepats',
 121                 action='append', help='exclude interfaces from the list of '
 122                 + 'interfaces to operate on by a PATTERN '
 123                 + '(note that this option doesn\'t disable mappings)')
 124
 125
 126 def update_ifupdown_argparser(argparser):
 127     argparser.add_argument('-a', '--all', action='store_true',
 128                 help='process all interfaces marked \"auto\"')
 129     argparser.add_argument('-f', '--force', dest='force',
 130                 action='store_true',
 131                 help='force run all operations')
 132     argparser.add_argument('-n', '--no-act', dest='noact',
 133                 action='store_true', help='print out what would happen,' +
 134                 'but don\'t do it')
 135
 136 def update_ifup_argparser(argparser):
 137     update_ifupdown_argparser(argparser)
 138
 139 def update_ifdown_argparser(argparser):
 140     update_ifupdown_argparser(argparser)
 141
 142 def update_ifquery_argparser(argparser):
 143     argparser.add_argument('-l', '--list', action='store_true', dest='all',
 144                 help='process all interfaces marked \"auto\"')
 145     group = argparser.add_mutually_exclusive_group(required=False)
 146     group.add_argument('-r', '--running-state', dest='runningstate',
 147                        action='store_true',
 148                        help='query running state of an interface')
 149
 150     group.add_argument('-c', '--check-state', dest='checkcurstate',
 151                        action='store_true',
 152                        help='check running state of an interface')
 153
 154     # presumed-state is state maintained by ifupdown
 155     group.add_argument('--presumed-state', dest='presumedstate',
 156                        action='store_true', help=argparse.SUPPRESS)
 157
 158     # presumed-state-detailed prints all details about the object stored
 159     # by ifupdown
 160     group.add_argument('--presumed-state-detailed',
 161                        dest='presumedstatedetailed',
 162                        action='store_true', help=argparse.SUPPRESS)
 163
 164     group.add_argument('--format', dest='format', default='nwifaces',
 165                        choices=['nwifaces', 'json'], help=argparse.SUPPRESS)
 166
 167 def update_ifreload_argparser(argparser):
 168     update_ifupdown_argparser(argparser)
 169
 170 def parse_args(argsv, op):
 171     descr = 'interface management'
 172
 173     argparser = argparse.ArgumentParser(description=descr)
 174     update_argparser(argparser)
 175     if op == 'up':
 176         update_ifup_argparser(argparser)
 177     elif op == 'down':
 178         update_ifdown_argparser(argparser)
 179     elif op == 'query':
 180         update_ifquery_argparser(argparser)
 181     elif op == 'reload':
 182         update_ifreload_argparser(argparser)
 183
 184     return argparser.parse_args(argsv)
 185
 186 def main(argv):
 187     """ main function """
 188     try:
 189         op = None
 190         if re.search(r'ifup', argv[0]) != None:
 191             op = 'up'
 192         elif re.search(r'ifdown', argv[0]) != None:
 193             op = 'down'
 194         elif re.search(r'ifquery', argv[0]) != None:
 195             op = 'query'
 196         elif re.search(r'ifreload', argv[0]) != None:
 197             op = 'reload'
 198         else:
 199             print ('Unexpected executable.' +
 200                    ' Should be \'ifup\' or \'ifdown\' or \'ifquery\'')
 201             exit(1)
 202
 203         # Command line arg parser
 204         args = parse_args(argv[1:], op)
 205         if len(args.iflist) > 0 and args.all is True:
 206             print 'interface list cannot be specified with all option'
 207             exit(1)
 208
 209         init(args)
 210         run(args, op)
 211     except Exception, e:
 212         if str(e) == '':
 213             exit(1)
 214
 215         if args.debug == True:
 216             raise
 217         else:
 218             logger.error(str(e))
 219             print '\nRerun the command with \'-d\' for a detailed errormsg'
 220         exit(1)
 221     finally:
 222         deinit()
 223
 224 if __name__ == "__main__":
 225
 226     if not os.geteuid() == 0:
 227         print 'Error: Must be root to run this command'
 228         exit(1)
 229
 230     """
 231     XXX: Cannot use this. A spawned dhclient process can hold the lock
 232     if not utilities.lockFile(lockfile):
 233         print 'Another instance of this program is already running.'
 234         exit(0)
 235     """
 236
 237     main(sys.argv)