contrib/errcode/errcode.py

   1 #!/usr/bin/env python
   2 # Copyright (C) 2008 Stefan Hajnoczi <stefanha@gmail.com>.
   3 #
   4 # This program is free software; you can redistribute it and/or
   5 # modify it under the terms of the GNU General Public License as
   6 # published by the Free Software Foundation; either version 2 of the
   7 # License, or any later version.
   8 #
   9 # This program is distributed in the hope that it will be useful, but
  10 # WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12 # General Public License for more details.
  13 #
  14 # You should have received a copy of the GNU General Public License
  15 # along with this program; if not, write to the Free Software
  16 # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17 import sys
  18
  19 try:
  20     import errcodedb
  21 except ImportError:
  22     sys.stderr.write('Please run this first: ./build_errcodedb.py >errcodedb.py\n')
  23     sys.exit(1)
  24
  25 def to_pxenv_status(errno):
  26     return errno & 0xff
  27
  28 def to_uniq(errno):
  29     return (errno >> 8) & 0x1f
  30
  31 def to_errfile(errno):
  32     return (errno >> 13) & 0x7ff
  33
  34 def to_posix_errno(errno):
  35     return (errno >> 24) & 0x7f
  36
  37 def lookup_errno_component(defines, component):
  38     if component in defines:
  39         return defines[component]
  40     else:
  41         return '0x%x' % component
  42
  43 class Errcode(object):
  44     def __init__(self, errno):
  45         self.pxenv_status = to_pxenv_status(errno)
  46         self.uniq = to_uniq(errno)
  47         self.errfile = to_errfile(errno)
  48         self.posix_errno = to_posix_errno(errno)
  49
  50     def rawstr(self):
  51         return 'pxenv_status=0x%x uniq=%d errfile=0x%x posix_errno=0x%x' % (self.pxenv_status, self.uniq, self.errfile, self.posix_errno)
  52
  53     def prettystr(self):
  54         return 'pxenv_status=%s uniq=%d errfile=%s posix_errno=%s' % (
  55                 lookup_errno_component(errcodedb.pxenv_status, self.pxenv_status),
  56                 self.uniq,
  57                 lookup_errno_component(errcodedb.errfile, self.errfile),
  58                 lookup_errno_component(errcodedb.posix_errno, self.posix_errno)
  59                 )
  60
  61     def __str__(self):
  62         return self.prettystr()
  63
  64 def usage():
  65     sys.stderr.write('usage: %s ERROR_NUMBER\n' % sys.argv[0])
  66     sys.exit(1)
  67
  68 if __name__ == '__main__':
  69     if len(sys.argv) != 2:
  70         usage()
  71
  72     try:
  73         errno = int(sys.argv[1], 16)
  74     except ValueError:
  75         usage()
  76
  77     print Errcode(errno)
  78     sys.exit(0)