[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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| 8 | # CVS info |
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[16] | 9 | # $Date: 2002/08/16 07:43:21 $ |
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| 10 | # $Revision: 1.9 $ |
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[2] | 11 | # |
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[14] | 12 | # Copyright (C) 2002 |
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[6] | 13 | # |
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[14] | 14 | # This file is part of the pxeconfig utils |
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[6] | 15 | # |
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[14] | 16 | # This program is free software; you can redistribute it and/or modify it |
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| 17 | # under the terms of the GNU General Public License as published by the |
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| 18 | # Free Software Foundation; either version 2, or (at your option) any |
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| 19 | # later version. |
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[6] | 20 | # |
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[14] | 21 | # This program is distributed in the hope that it will be useful, |
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| 22 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 23 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 24 | # GNU General Public License for more details. |
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[6] | 25 | # |
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[14] | 26 | # You should have received a copy of the GNU General Public License |
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| 27 | # along with this program; if not, write to the Free Software |
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| 28 | # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA |
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| 29 | # |
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[2] | 30 | """ |
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[10] | 31 | Usage: pxeconfig [-d|--directory <pxe_config_dir> ] |
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| 32 | |
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[2] | 33 | With this program you can configure which PXE configuration file |
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[9] | 34 | to use when a node boots. The program will ask the following questions: |
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[2] | 35 | 1) Network address (Class C-network address only) |
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[9] | 36 | 2) Starting number |
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[2] | 37 | 3) Ending number |
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[9] | 38 | 4) Which PXE config file to use |
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[2] | 39 | |
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| 40 | For example, if the answers are: |
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| 41 | 1) 10.168.44 |
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| 42 | 2) 2 |
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| 43 | 3) 4 |
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| 44 | 4) default.node_install |
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| 45 | |
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| 46 | Then the result is that is create symbolic links in /tftpboot/pxelinux.cfg: |
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| 47 | 0AA82C02 ----> default.node_install |
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| 48 | 0AA82C03 ----> default.node_install |
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| 49 | 0AA82C04 ----> default.node_install |
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| 50 | """ |
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| 51 | |
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| 52 | import string |
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| 53 | import sys |
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| 54 | import os |
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| 55 | import glob |
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[3] | 56 | import getopt |
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[2] | 57 | |
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| 58 | # DEBUG |
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| 59 | # |
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| 60 | DEBUG=0 |
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| 61 | |
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| 62 | # Constants |
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| 63 | # |
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[4] | 64 | PXE_CONF_DIR='/tftpboot/pxelinux.cfg' |
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[2] | 65 | NADDR=0 |
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| 66 | PXEFILE=1 |
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| 67 | START=2 |
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| 68 | END=3 |
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[3] | 69 | SHORTOPT_LIST='d:' |
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| 70 | LONGOPT_LIST=['directory='] |
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[2] | 71 | |
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| 72 | def choice_pxe_configfile(): |
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| 73 | """ |
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[9] | 74 | Let user choose which pxeconfig file to use. |
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[2] | 75 | """ |
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| 76 | |
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[4] | 77 | os.chdir(PXE_CONF_DIR) |
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[2] | 78 | |
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[9] | 79 | # Try to determine to which file the default symlink points, and |
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| 80 | # if it exists, remove it from the list. |
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[2] | 81 | # |
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| 82 | try: |
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| 83 | default_file = os.readlink('default') |
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| 84 | except OSError: |
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| 85 | default_file = None |
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| 86 | pass |
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| 87 | |
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| 88 | files = glob.glob('default.*') |
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| 89 | if not files: |
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| 90 | print 'There are no pxe config files starting with: default.' |
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| 91 | sys.exit(1) |
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| 92 | |
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| 93 | if default_file: |
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| 94 | files.remove(default_file) |
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| 95 | |
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| 96 | |
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| 97 | print 'Which pxe config file must we use: ?' |
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| 98 | i = 1 |
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| 99 | for file in files: |
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| 100 | print "%d : %s" %(i,file) |
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| 101 | i = i +1 |
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| 102 | |
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| 103 | while 1: |
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[16] | 104 | index = raw_input('Select a number: ') |
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[2] | 105 | try: |
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| 106 | index = int(index) |
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| 107 | except ValueError: |
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| 108 | index = len(files) + 1 |
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| 109 | |
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| 110 | # Is the user smart enough to select |
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[9] | 111 | # the right value?? |
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[2] | 112 | # |
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| 113 | if 0 < index <= len(files): break |
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| 114 | |
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| 115 | return files[index-1] |
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| 116 | |
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| 117 | def create_links(list): |
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| 118 | """ |
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[4] | 119 | Create the links in the PXE_CONF_DIR, |
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[9] | 120 | list : A list containing: network hex address, pxe config file, |
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[2] | 121 | start number, end number |
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| 122 | """ |
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[4] | 123 | os.chdir(PXE_CONF_DIR) |
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[2] | 124 | naddr = list[NADDR] |
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| 125 | pxe_filename = list[PXEFILE] |
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| 126 | for i in range(list[START], list[END]+1): |
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| 127 | haddr = '%s%02X' %(naddr, i) |
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| 128 | if DEBUG: |
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| 129 | print 'linking %s to %s' %(haddr, pxe_filename) |
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[15] | 130 | |
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| 131 | if os.path.exists(haddr): |
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| 132 | os.unlink(haddr) |
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| 133 | |
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[2] | 134 | os.symlink(pxe_filename, haddr) |
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| 135 | |
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| 136 | |
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| 137 | def check_network(net): |
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| 138 | """ |
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[9] | 139 | This function checks if the give network is a Class C-network and will |
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[2] | 140 | convert the network address to a hex address if true. |
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| 141 | """ |
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| 142 | d = string.split(net, '.') |
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| 143 | |
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| 144 | if len(d) != 3: |
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| 145 | print('Only C-class nerwork addresses are supported!!!') |
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| 146 | sys.exit(1) |
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| 147 | |
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| 148 | # Check if we have valid network values |
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| 149 | r = '' |
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| 150 | for i in d: |
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| 151 | i = check_number(i) |
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| 152 | r = '%s%02X' %(r,i) |
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| 153 | |
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| 154 | if DEBUG: |
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| 155 | print r |
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| 156 | |
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| 157 | return r |
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| 158 | |
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| 159 | def check_number(number): |
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| 160 | """ |
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| 161 | This functions checks if the input is between 0 < number < 255: |
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| 162 | number : is a string |
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| 163 | """ |
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| 164 | try: |
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| 165 | n = int(number) |
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| 166 | except ValueError, detail: |
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| 167 | print detail |
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| 168 | sys.exit(1) |
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| 169 | |
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| 170 | if 0 <= n <= 255: |
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| 171 | return n |
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| 172 | else: |
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| 173 | print '%s is not a valid number, must be between 0 and 255' %number |
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| 174 | sys.exit(1) |
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| 175 | |
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| 176 | def interactive(): |
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| 177 | |
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| 178 | iptable = {} |
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| 179 | |
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| 180 | print __doc__ |
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| 181 | |
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[9] | 182 | network = raw_input('Give network address (xxx.xxx.xxx): ') |
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[2] | 183 | naddr = check_network(network) |
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| 184 | |
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| 185 | start = raw_input('Starting number: ') |
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| 186 | start = check_number(start) |
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| 187 | |
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| 188 | end = raw_input('Ending number: ') |
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| 189 | end = check_number(end) |
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| 190 | |
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| 191 | pxe_filename = choice_pxe_configfile() |
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| 192 | |
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| 193 | iptable[network] = [] |
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| 194 | iptable[network].append(naddr) |
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| 195 | iptable[network].append(pxe_filename) |
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| 196 | iptable[network].append(int(start)) |
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| 197 | iptable[network].append(int(end)) |
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| 198 | |
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| 199 | for net in iptable.keys(): |
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| 200 | if DEBUG: |
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| 201 | print net, iptable[net] |
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| 202 | create_links(iptable[net]) |
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| 203 | |
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[6] | 204 | |
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[3] | 205 | def check_args(argv): |
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| 206 | """ |
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[6] | 207 | command line option: |
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| 208 | -d/--directory <dir> |
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| 209 | Where <dir> is the directory where the pxe config files reside. |
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[3] | 210 | """ |
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[4] | 211 | global PXE_CONF_DIR |
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[3] | 212 | try: |
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| 213 | opts, args = getopt.getopt(argv[1:], SHORTOPT_LIST, LONGOPT_LIST) |
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| 214 | except getopt.error, detail: |
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[6] | 215 | print check_args.__doc__ |
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[3] | 216 | print detail |
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| 217 | sys.exit(1) |
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| 218 | |
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| 219 | if opts: |
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[4] | 220 | opt, PXE_CONF_DIR = opts[0] |
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[3] | 221 | |
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[4] | 222 | if not os.path.isdir(PXE_CONF_DIR): |
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| 223 | print 'Directory %s does not exists' %PXE_CONF_DIR |
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| 224 | sys.exit(1) |
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| 225 | |
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[2] | 226 | def main(): |
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[3] | 227 | check_args(sys.argv) |
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[2] | 228 | interactive() |
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| 229 | |
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| 230 | if __name__ == '__main__': |
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| 231 | main() |
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