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  • Committer: William Grant
  • Date: 2009-01-20 06:00:55 UTC
  • mto: This revision was merged to the branch mainline in revision 1090.
  • Revision ID: grantw@unimelb.edu.au-20090120060055-iuvd8hycor67acfa
ivle.rpc.decorators: Add (new package, too). Has a couple of decorators to
    apply most security policy in userservice, making it significantly shorter
    and easier to audit.
www/apps/userservice: Use the decorators to protect all actions whose existing
    policy can be easily replaced with them.

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ivle/interpret.py
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    # Additional environment variables
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    username = studpath.url_to_jailpaths(req.path)[0]
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    env['HOME'] = os.path.join('/home', username)
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class ExecutionError(Exception):
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    pass
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def execute_raw(user, jail_dir, working_dir, binary, args):
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    '''Execute a binary in a user's jail, returning the raw output.
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    The binary is executed in the given working directory with the given
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    args. A tuple of (stdout, stderr) is returned.
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    '''
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    tramp = location_cgi_python
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    tramp_dir = os.path.split(location_cgi_python)[0]
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    # Fire up trampoline. Vroom, vroom.
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    proc = subprocess.Popen(
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        [tramp, str(user.unixid), jail_dir, working_dir, binary] + args,
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        stdin=subprocess.PIPE, stdout=subprocess.PIPE,
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        stderr=subprocess.PIPE, cwd=tramp_dir, close_fds=True)
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    exitcode = proc.wait()
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    if exitcode != 0:
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        raise ExecutionError('subprocess ended with code %d, stderr %s' %
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                             (exitcode, proc.stderr.read()))
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    return (proc.stdout.read(), proc.stderr.read())