source: package_tags/sipb-xen-www/3/code/getafsgroups.py @ 2916

Last change on this file since 2916 was 246, checked in by ecprice, 17 years ago

Revert to old list method until we start updating the cache.
Fix a bug in getafsgroups.

File size: 3.5 KB
Line 
1#!/usr/bin/python
2import pprint
3import subprocess
4
5# import ldap
6# l = ldap.open("W92-130-LDAP-2.mit.edu")
7# # ldap.mit.edu is 1/2 broken right now so we're going to the working backend
8# l.simple_bind_s("", "")
9
10# def getLdapGroups(user):
11#     """
12#     getLdapGroups(user): returns a generator for the list of LDAP groups containing user
13#     """
14#     for user_data in l.search_s("ou=affiliates,dc=mit,dc=edu", ldap.SCOPE_ONELEVEL, "uid=" + user, []):
15#         for group_data in l.search_s("ou=groups,dc=mit,dc=edu", ldap.SCOPE_ONELEVEL, "uniqueMember="+user_data[0], ['cn']):
16#             yield group_data[1]['cn'][0]
17
18# def checkLdapGroups(user, group):
19#     """
20#     checkLdapGroups(user, group): returns True if and only if user is in LDAP group group
21#     """
22#     for result_data in l.search_s("ou=affiliates,dc=mit,dc=edu", ldap.SCOPE_ONELEVEL, "uid=" + user, []):
23#         if l.search_s("ou=groups,dc=mit,dc=edu", ldap.SCOPE_ONELEVEL, "(&(cn=" + group + ")(uniqueMember="+result_data[0] + "))", []) != []:
24#             return True
25#     return False
26
27class MyException(Exception):
28    pass
29
30def getAfsGroupMembers(group, cell):
31    p = subprocess.Popen(["pts", "membership", group, '-c', cell], 
32                         stdout=subprocess.PIPE, stderr=subprocess.PIPE)
33    if p.wait():
34        return []
35    return [line.strip() for line in p.stdout.readlines()[1:]]
36
37def checkAfsGroup(user, group, cell):
38    """
39    checkAfsGroup(user, group) returns True if and only if user is in AFS group group in cell cell
40    """
41    return user in getAfsGroupMembers(group, cell)
42
43def getCell(locker):
44    p = subprocess.Popen(["fs", "whichcell", "/mit/" + locker], 
45                         stdout=subprocess.PIPE, stderr=subprocess.PIPE)
46    if p.wait():
47        raise MyException(p.stderr.read())
48    return p.stdout.read().split()[-1][1:-1]
49
50def getLockerAcl(locker):
51    p = subprocess.Popen(["fs", "listacl", "/mit/" + locker], 
52                         stdout=subprocess.PIPE, stderr=subprocess.PIPE)
53    if p.wait():
54        raise MyException(p.stderr.read())
55    lines = p.stdout.readlines()
56    values = []
57    for line in lines[1:]:
58        fields = line.split()
59        if fields[0] == 'Negative':
60            break
61        if 'rlidwka' in fields[1]:
62            values.append(fields[0])
63    return values
64
65def notLockerOwner(user, locker):
66    """
67    notLockerOwner(user, locker) returns false if and only if user administers locker.
68
69    If the user does not own the locker, returns the string reason for
70    the failure.
71    """
72    try:
73        cell = getCell(locker)
74        values = getLockerAcl(locker)
75    except MyException, e:
76        return str(e)
77
78    for entry in values:
79        if entry == user or (entry[0:6] == "system" and 
80                                checkAfsGroup(user, entry, cell)):
81            return False
82    return "You don't have admin bits on /mit/" + locker
83
84
85if __name__ == "__main__":
86#    print list(getldapgroups("tabbott"))
87    print checkAfsGroup("tabbott", "system:debathena", 'athena.mit.edu')
88    print checkAfsGroup("tabbott", "system:debathena", 'sipb.mit.edu')
89    print checkAfsGroup("tabbott", "system:debathena-root", 'athena.mit.edu')
90    print checkAfsGroup("tabbott", "system:hmmt-request", 'athena.mit.edu')
91    print notLockerOwner("tabbott", "tabbott")
92    print notLockerOwner("tabbott", "debathena")
93    print notLockerOwner("tabbott", "sipb")
94    print notLockerOwner("tabbott", "lsc")
95    print notLockerOwner("tabbott", "scripts")
96    print notLockerOwner("ecprice", "hmmt")
Note: See TracBrowser for help on using the repository browser.