[2] | 1 | #!/usr/bin/env python |
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| 2 | # |
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| 3 | # Author: Bas van der Vlies <basv@sara.nl> |
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| 4 | # Date : 16 February 2002 |
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| 5 | # |
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| 6 | # Tester: Walter de Jong <walter@sara.nl> |
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| 7 | # |
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[29] | 8 | # SVN info |
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| 9 | # $Id: pxeconfig 53 2005-09-19 13:55:56Z bas $ |
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[2] | 10 | # |
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[14] | 11 | # Copyright (C) 2002 |
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[6] | 12 | # |
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[14] | 13 | # This file is part of the pxeconfig utils |
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[6] | 14 | # |
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[14] | 15 | # This program is free software; you can redistribute it and/or modify it |
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| 16 | # under the terms of the GNU General Public License as published by the |
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| 17 | # Free Software Foundation; either version 2, or (at your option) any |
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| 18 | # later version. |
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[6] | 19 | # |
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[14] | 20 | # This program is distributed in the hope that it will be useful, |
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| 21 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 22 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 23 | # GNU General Public License for more details. |
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[6] | 24 | # |
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[14] | 25 | # You should have received a copy of the GNU General Public License |
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| 26 | # along with this program; if not, write to the Free Software |
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| 27 | # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA |
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| 28 | # |
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[2] | 29 | """ |
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[19] | 30 | Usage: pxeconfig |
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[49] | 31 | |
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[19] | 32 | [-d|--directory <pxe_config_dir>] |
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[53] | 33 | [-f|--file <filename>] [hostname(s)] |
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| 34 | [-n|--net <C-net> -s|--start <number> -e|--end <number> -f|--file <filename>] |
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| 35 | [-r|--remove] |
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[24] | 36 | [-V|--version] |
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[10] | 37 | |
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[19] | 38 | With this program you can configure which PXE configuration file a node |
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| 39 | will use when it boots. The program can be started interactivly or via |
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| 40 | command line options. |
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| 41 | |
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| 42 | When this program is started interactive it will ask the following questions: |
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[2] | 43 | 1) Network address (Class C-network address only) |
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[9] | 44 | 2) Starting number |
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[2] | 45 | 3) Ending number |
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[9] | 46 | 4) Which PXE config file to use |
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[2] | 47 | |
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| 48 | For example, if the answers are: |
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| 49 | 1) 10.168.44 |
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| 50 | 2) 2 |
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| 51 | 3) 4 |
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| 52 | 4) default.node_install |
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| 53 | |
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| 54 | Then the result is that is create symbolic links in /tftpboot/pxelinux.cfg: |
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| 55 | 0AA82C02 ----> default.node_install |
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| 56 | 0AA82C03 ----> default.node_install |
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| 57 | 0AA82C04 ----> default.node_install |
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| 58 | """ |
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| 59 | |
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| 60 | import string |
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| 61 | import sys |
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| 62 | import os |
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| 63 | import glob |
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[3] | 64 | import getopt |
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[47] | 65 | import socket |
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[2] | 66 | |
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| 67 | # DEBUG |
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| 68 | # |
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| 69 | DEBUG=0 |
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| 70 | |
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| 71 | # Constants |
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| 72 | # |
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[4] | 73 | PXE_CONF_DIR='/tftpboot/pxelinux.cfg' |
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[19] | 74 | NETWORK='network' |
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| 75 | FILENAME='filename' |
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| 76 | START='start' |
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| 77 | END='end' |
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[53] | 78 | VERSION='0.6' |
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| 79 | REMOVE='remove' |
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[2] | 80 | |
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[53] | 81 | SHORTOPT_LIST='hVd:n:s:e:f:r' |
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| 82 | LONGOPT_LIST=['help', 'version', 'directory=', 'net=', 'start=', 'end=', 'file=', 'remove', 'debug'] |
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[19] | 83 | |
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| 84 | def select_pxe_configfile(): |
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[2] | 85 | """ |
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[9] | 86 | Let user choose which pxeconfig file to use. |
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[2] | 87 | """ |
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| 88 | |
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[4] | 89 | os.chdir(PXE_CONF_DIR) |
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[2] | 90 | |
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[9] | 91 | # Try to determine to which file the default symlink points, and |
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| 92 | # if it exists, remove it from the list. |
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[2] | 93 | # |
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| 94 | try: |
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| 95 | default_file = os.readlink('default') |
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| 96 | except OSError: |
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| 97 | default_file = None |
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| 98 | pass |
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| 99 | |
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| 100 | files = glob.glob('default.*') |
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| 101 | if not files: |
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| 102 | print 'There are no pxe config files starting with: default.' |
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| 103 | sys.exit(1) |
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| 104 | |
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| 105 | if default_file: |
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| 106 | files.remove(default_file) |
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| 107 | |
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| 108 | |
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| 109 | print 'Which pxe config file must we use: ?' |
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| 110 | i = 1 |
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| 111 | for file in files: |
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| 112 | print "%d : %s" %(i,file) |
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| 113 | i = i +1 |
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| 114 | |
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| 115 | while 1: |
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[16] | 116 | index = raw_input('Select a number: ') |
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[2] | 117 | try: |
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| 118 | index = int(index) |
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| 119 | except ValueError: |
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| 120 | index = len(files) + 1 |
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| 121 | |
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| 122 | # Is the user smart enough to select |
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[9] | 123 | # the right value?? |
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[2] | 124 | # |
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| 125 | if 0 < index <= len(files): break |
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| 126 | |
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| 127 | return files[index-1] |
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| 128 | |
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[53] | 129 | def manage_links(dict): |
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[2] | 130 | """ |
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[4] | 131 | Create the links in the PXE_CONF_DIR, |
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[9] | 132 | list : A list containing: network hex address, pxe config file, |
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[2] | 133 | start number, end number |
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| 134 | """ |
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[4] | 135 | os.chdir(PXE_CONF_DIR) |
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[19] | 136 | naddr = dict[NETWORK] |
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| 137 | pxe_filename = dict[FILENAME] |
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| 138 | for i in range(dict[START], dict[END]+1): |
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[2] | 139 | haddr = '%s%02X' %(naddr, i) |
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[15] | 140 | |
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[53] | 141 | if dict[REMOVE]: |
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| 142 | if DEBUG: |
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| 143 | print 'removing %s/%s' %(PXE_CONF_DIR, haddr) |
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| 144 | if os.path.exists(haddr): |
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| 145 | os.unlink(haddr) |
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| 146 | else: |
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| 147 | if DEBUG: |
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| 148 | print 'linking %s to %s' %(haddr, pxe_filename) |
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| 149 | if os.path.exists(haddr): |
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| 150 | os.unlink(haddr) |
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| 151 | os.symlink(pxe_filename, haddr) |
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[15] | 152 | |
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[47] | 153 | def convert_network(net, prefix=''): |
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[2] | 154 | """ |
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[9] | 155 | This function checks if the give network is a Class C-network and will |
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[2] | 156 | convert the network address to a hex address if true. |
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| 157 | """ |
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| 158 | d = string.split(net, '.') |
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| 159 | |
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| 160 | if len(d) != 3: |
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[19] | 161 | if prefix: |
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| 162 | net = prefix + ' : ' + net |
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| 163 | |
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| 164 | print '%s is not a valid C-class network address!!!' %net |
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[2] | 165 | sys.exit(1) |
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| 166 | |
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[19] | 167 | |
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| 168 | # Display right message for interactive/commandline |
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| 169 | if prefix: |
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| 170 | prefix = prefix + ' ' + net |
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| 171 | else: |
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| 172 | prefix = net |
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| 173 | |
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[2] | 174 | # Check if we have valid network values |
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| 175 | r = '' |
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| 176 | for i in d: |
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[19] | 177 | i = check_number(i, prefix) |
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[2] | 178 | r = '%s%02X' %(r,i) |
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| 179 | |
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| 180 | if DEBUG: |
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| 181 | print r |
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| 182 | |
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| 183 | return r |
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| 184 | |
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[19] | 185 | def check_number(number, prefix=''): |
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[2] | 186 | """ |
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| 187 | This functions checks if the input is between 0 < number < 255: |
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| 188 | number : is a string |
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[19] | 189 | prefix ; a string that must be displayed if an error occurs |
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[2] | 190 | """ |
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| 191 | try: |
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| 192 | n = int(number) |
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| 193 | except ValueError, detail: |
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[19] | 194 | print prefix,detail |
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[2] | 195 | sys.exit(1) |
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| 196 | |
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| 197 | if 0 <= n <= 255: |
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| 198 | return n |
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| 199 | else: |
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[19] | 200 | |
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| 201 | if prefix: |
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| 202 | number = prefix +' : ' + number |
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| 203 | |
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[2] | 204 | print '%s is not a valid number, must be between 0 and 255' %number |
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| 205 | sys.exit(1) |
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| 206 | |
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[19] | 207 | def interactive(binfo): |
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[2] | 208 | |
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| 209 | print __doc__ |
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| 210 | |
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[9] | 211 | network = raw_input('Give network address (xxx.xxx.xxx): ') |
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[47] | 212 | naddr = convert_network(network) |
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[2] | 213 | |
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| 214 | start = raw_input('Starting number: ') |
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| 215 | start = check_number(start) |
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| 216 | |
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| 217 | end = raw_input('Ending number: ') |
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| 218 | end = check_number(end) |
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| 219 | |
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[19] | 220 | pxe_filename = select_pxe_configfile() |
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[2] | 221 | |
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[19] | 222 | binfo[NETWORK] = naddr |
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| 223 | binfo[START] = int(start) |
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| 224 | binfo[END] = int(end) |
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| 225 | binfo[FILENAME] = pxe_filename |
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[2] | 226 | |
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[19] | 227 | if DEBUG: |
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| 228 | print network, binfo |
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[2] | 229 | |
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[19] | 230 | def check_cmd_line(binfo): |
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| 231 | if len(binfo.keys()) != 4: |
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| 232 | print __doc__ |
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[20] | 233 | print 'Not enough arguments to create the links!!' |
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[19] | 234 | sys.exit(1) |
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[6] | 235 | |
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[19] | 236 | # check_filename |
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| 237 | # |
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| 238 | if not os.path.isfile(os.path.join(PXE_CONF_DIR, binfo[FILENAME])): |
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| 239 | print '%s: Filename does not exists' %binfo[FILENAME] |
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| 240 | sys.exit(1) |
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| 241 | |
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| 242 | def check_args(argv, binfo): |
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[3] | 243 | """ |
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[47] | 244 | This function parses the command line options and returns the rest as |
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| 245 | an list of hostnames: |
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| 246 | argv : a list of command line options. |
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| 247 | binfo : returning a dict with the netinfo. if used non-interactively |
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| 248 | hostnames: the rest of the command lines options that are not-parseble. |
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[3] | 249 | """ |
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[4] | 250 | global PXE_CONF_DIR |
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[53] | 251 | global DEBUG |
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[19] | 252 | |
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[3] | 253 | try: |
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| 254 | opts, args = getopt.getopt(argv[1:], SHORTOPT_LIST, LONGOPT_LIST) |
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| 255 | except getopt.error, detail: |
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[20] | 256 | print __doc__ |
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[3] | 257 | print detail |
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| 258 | sys.exit(1) |
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| 259 | |
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[19] | 260 | # Check given options |
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| 261 | # |
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| 262 | for opt,value in opts: |
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| 263 | if opt in ['-d', '--directory']: |
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| 264 | if os.path.isdir(value): |
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| 265 | PXE_CONF_DIR = value |
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| 266 | else: |
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| 267 | print 'Directory %s does not exists\n' %value |
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| 268 | sys.exit(1) |
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[3] | 269 | |
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[19] | 270 | elif opt in ['-n', '--net']: |
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| 271 | network = value |
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[47] | 272 | binfo[NETWORK] = convert_network(value, opt) |
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[4] | 273 | |
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[19] | 274 | elif opt in ['-s', '--start']: |
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| 275 | binfo[START] = check_number(value, opt) |
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| 276 | |
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| 277 | elif opt in ['-e', '--end']: |
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| 278 | binfo[END] = check_number(value, opt) |
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| 279 | |
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| 280 | elif opt in ['-f', '--file']: |
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| 281 | binfo[FILENAME] = value |
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| 282 | |
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[24] | 283 | elif opt in ['-V', '--version']: |
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[23] | 284 | print VERSION |
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| 285 | sys.exit(0) |
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| 286 | |
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[53] | 287 | elif opt in ['-r', '--remove']: |
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| 288 | binfo[REMOVE] = 1 |
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| 289 | |
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| 290 | elif opt in ['--debug']: |
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| 291 | DEBUG = 1 |
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| 292 | |
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[20] | 293 | elif opt in ['-h', '--help']: |
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| 294 | print __doc__ |
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| 295 | sys.exit(0) |
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[19] | 296 | |
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[51] | 297 | if args: |
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| 298 | return args |
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[20] | 299 | |
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[47] | 300 | def hosts_links(hosts, binfo): |
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| 301 | for host in hosts: |
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| 302 | try: |
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| 303 | addr = socket.gethostbyname(host) |
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| 304 | except socket.error,detail: |
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| 305 | print '%s not an valid hostname: %s' %(host,detail) |
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| 306 | sys.exit(1) |
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| 307 | |
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| 308 | net = string.splitfields(addr, '.') |
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| 309 | cnet = string.joinfields(net[0:3], '.') |
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| 310 | |
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| 311 | binfo[NETWORK] = convert_network(cnet) |
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| 312 | binfo[START] = int(net[3]) |
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| 313 | binfo[END] = int(net[3]) |
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[53] | 314 | manage_links(binfo) |
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[47] | 315 | |
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| 316 | |
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[2] | 317 | def main(): |
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[19] | 318 | # A dictionary holding the boot info |
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| 319 | # |
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| 320 | bootinfo = {} |
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[53] | 321 | bootinfo[REMOVE] = 0 |
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[2] | 322 | |
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[47] | 323 | hostnames = check_args(sys.argv, bootinfo) |
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| 324 | |
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[53] | 325 | if bootinfo[REMOVE]: |
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| 326 | bootinfo[FILENAME] = 'remove_boot_file' |
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[47] | 327 | |
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[53] | 328 | |
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[47] | 329 | # If we supplied args then make links for the supplied hosts |
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| 330 | # else make links for class C-networks |
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| 331 | # |
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| 332 | if hostnames: |
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| 333 | if not bootinfo.has_key(FILENAME): |
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[53] | 334 | bootinfo[FILENAME] = select_pxe_configfile() |
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[47] | 335 | hosts_links(hostnames,bootinfo) |
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[19] | 336 | else: |
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[47] | 337 | if bootinfo: |
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| 338 | check_cmd_line(bootinfo) |
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| 339 | else: |
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| 340 | interactive(bootinfo) |
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[53] | 341 | manage_links(bootinfo) |
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[19] | 342 | |
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[2] | 343 | if __name__ == '__main__': |
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| 344 | main() |
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