keep /var/www/sipb-xen-www writable by our accounts
[invirt/packages/invirt-web.git] / code / cache_acls.py
1 #!/usr/bin/python
2 from sipb_xen_database import *
3 import sys
4 import getafsgroups
5 import subprocess
6
7 def expandLocker(name):
8     groups = getafsgroups.getLockerAcl(name)
9     cell = getafsgroups.getCell(name)
10     ans = set()
11     for group in groups:
12         if ':' in group:
13             ans.update(getafsgroups.getAfsGroupMembers(group, cell))
14         else:
15             ans.add(group)
16     return ans
17
18 def isUser(name):
19     p = subprocess.Popen(['vos', 'examine', 'user.'+name],
20                          stdout=subprocess.PIPE, stderr=subprocess.PIPE)
21     if p.wait():
22         return False
23     return True
24     
25
26 def expandName(name):
27     if ':' not in name:
28         if isUser(name):
29             return [name]
30         name = 'system:'+name
31     return getafsgroups.getAfsGroupMembers(name, 'athena.mit.edu')
32
33 def refreshMachine(m):
34     people = set()
35     people.update(expandLocker(m.owner))
36     people.update(expandName(m.administrator))
37     old_people = set(a.user for a in m.acl)
38     for removed in old_people - people:
39         ma = [x for x in m.acl if x.user == removed][0]
40         ctx.current.delete(ma)
41     for p in people - old_people:
42         ma = MachineAccess(machine_id=m.machine_id, user=p)
43         ctx.current.save(ma)
44     
45 def refreshCache():
46     transaction = ctx.current.create_transaction()
47
48     try:
49         machines = Machine.select()
50         for m in machines:
51             refreshMachine(m)
52         ctx.current.flush()
53             
54         # Atomically execute our changes
55         transaction.commit()
56     except:
57         # Failed! Rollback all the changes.
58         transaction.rollback()
59         raise
60
61 if __name__ == '__main__':
62     connect('postgres://sipb-xen@sipb-xen-dev/sipb_xen')
63     refreshCache()