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Viewing changes to ivle/interpret.py

Merged from new-dispatch branch.
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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())