configs/common/SysPaths.py

   1 # Copyright (c) 2006 The Regents of The University of Michigan
   2 # All rights reserved.
   3 #
   4 # Redistribution and use in source and binary forms, with or without
   5 # modification, are permitted provided that the following conditions are
   6 # met: redistributions of source code must retain the above copyright
   7 # notice, this list of conditions and the following disclaimer;
   8 # redistributions in binary form must reproduce the above copyright
   9 # notice, this list of conditions and the following disclaimer in the
  10 # documentation and/or other materials provided with the distribution;
  11 # neither the name of the copyright holders nor the names of its
  12 # contributors may be used to endorse or promote products derived from
  13 # this software without specific prior written permission.
  14 #
  15 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  16 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  17 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  18 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  19 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  20 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  21 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  22 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  23 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  25 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26 #
  27 # Authors: Ali Saidi
  28
  29 import os, sys
  30 from os.path import isdir, join as joinpath
  31 from os import environ as env
  32
  33 def disk(file):
  34     system()
  35     return joinpath(disk.dir, file)
  36
  37 def binary(file):
  38     system()
  39     return joinpath(binary.dir, file)
  40
  41 def script(file):
  42     system()
  43     return joinpath(script.dir, file)
  44
  45 def system():
  46     if not system.dir:
  47         try:
  48                 path = env['M5_PATH'].split(':')
  49         except KeyError:
  50                 path = [ '/dist/m5/system', '/n/poolfs/z/dist/m5/system' ]
  51
  52         for system.dir in path:
  53             if os.path.isdir(system.dir):
  54                 break
  55         else:
  56             raise ImportError, "Can't find a path to system files."
  57
  58     if not binary.dir:
  59         binary.dir = joinpath(system.dir, 'binaries')
  60     if not disk.dir:
  61         disk.dir = joinpath(system.dir, 'disks')
  62     if not script.dir:
  63         script.dir = joinpath(system.dir, 'boot')
  64
  65 system.dir = None
  66 binary.dir = None
  67 disk.dir = None
  68 script.dir = None