# Copyright (C) 1998,1999,2000 by the Free Software Foundation, Inc.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software 
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

# This is mailman's interface to the alias database.

# TODO:
#     - fix this file!  /etc/alias hacking no longer works

# Write a wrapper program w/ root uid that allows the mailman user
# only to update the alias database.

import string
_file = open('/etc/aliases', 'r')
_lines = _file.readlines()
aliases = {}
_cur_line  = None

def _AddAlias(line):
  line = string.strip(line)
  if not line:
    return
  colon_index = string.find(line, ":")
  if colon_index < 1:
    raise "SyntaxError", "Malformed /etc/aliases file"
  alias = string.lower(string.strip(line[:colon_index]))
  rest = string.split(line[colon_index+1:], ",")
  rest = map(string.strip, rest)
  aliases[alias] = rest

for _line in _lines:
  if _line[0] == '#':
    continue
  if _line[0] == ' ' or _line[0] == '\t':
    _cur_line = _cur_line + _line
    continue
  if _cur_line:
    _AddAlias(_cur_line)
  _cur_line = _line
  
def GetAlias(str):
  str = string.lower(str)
  if not aliases.has_key(str):
    raise KeyError, "No such alias"
  return aliases[str]