source: trunk/packages/invirt-console-server/files/usr/bin/invirt-consolefs @ 1726

Last change on this file since 1726 was 1726, checked in by broder, 16 years ago

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[335]1#!/usr/bin/python
2
[1064]3import routefs
4from routes import Mapper
[335]5
[1064]6from syslog import *
[335]7from time import time
8
[1064]9import os
10import errno
[335]11
[841]12from invirt.config import structs as config
13from invirt import database
[344]14
[335]15realpath = "/home/machines/"
16
[1064]17class ConsoleFS(routefs.RouteFS):
[1726]18    """
19    ConsoleFS creates a series of subdirectories each mirroring the same real
20    directory, except for a single file - the .k5login - which is dynamically
21    generated for each subdirectory
22    """
23   
24    def __init__(self, *args, **kw):
25        """Initialize the filesystem and set it to allow_other access besides
26        the user who mounts the filesystem (i.e. root)
27        """
28        super(ConsoleFS, self).__init__(*args, **kw)
29        self.lasttime = 0
30        self.machines = []
31        self.fuse_args.add("allow_other", True)
32       
33        openlog('invirt-consolefs ', LOG_PID, LOG_DAEMON)
34       
35        syslog(LOG_DEBUG, 'Init complete.')
36   
37    def make_map(self):
38        m = Mapper()
39        m.connect('', controller='getMachines')
40        m.connect(':machine', controller='getMirror')
41        m.connect(':machine/.k5login', controller='getK5login')
42        m.connect(':machine/*(path)', controller='getMirror')
43        return m
44   
45    def recache(self):
46        if time() - self.lasttime > 5:
47            self.lasttime = time()
48            database.clear_cache()
49            self.machines = dict((machine.name, machine) for machine in database.session.query(database.Machine).all())
[1699]50
[1726]51    def getMachines(self, **kw):
52        self.recache()
53        return self.machines.keys()
54   
55    def getMirror(self, machine, path='', **kw):
56        """Translate the path into its realpath equivalent, and return that
57        """
58        real = realpath + path
59        if os.path.isdir(real):
60            # The list is converted to a set so that we can handle the case
61            # where there is already a .k5login in the realpath gracefully   
62            return routefs.Directory(set(os.listdir(real) + ['.k5login']))
63        elif os.path.islink(real):
64            return routefs.Symlink(os.readlink(real))
65        elif os.path.isfile(real):
66            return open(real).read()
67        else:
68            return -errno.EINVAL
69   
70    def getK5login(self, machine, **kw):
71        self.recache()
72        machine = self.machines[machine]
73        users = [acl.user for acl in machine.acl]
74        return "\n".join(map(self.userToPrinc, users) + [''])
75   
76    def mirrorPath(self, path):
77        """Translate a virtual path to its real path counterpart"""
78        return realpath + "/".join(getParts(path)[1:])
79   
80    def userToPrinc(self, user):
81        """Convert Kerberos v4-style names to v5-style and append a default
82        realm if none is specified
83        """
84        if '@' in user:
85            (princ, realm) = user.split('@')
86        else:
87            princ = user
88            realm = config.authn[0].realm
89       
90        return princ.replace('.', '/') + '@' + realm
[335]91
92if __name__ == '__main__':
[1726]93    database.connect()
94    routefs.main(ConsoleFS)
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