This file is indexed.

/usr/lib/python3/dist-packages/pexpect/async.py is in python3-pexpect 4.2.1-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
import asyncio
import errno

from pexpect import EOF

@asyncio.coroutine
def expect_async(expecter, timeout=None):
    # First process data that was previously read - if it maches, we don't need
    # async stuff.
    previously_read = expecter.spawn.buffer
    expecter.spawn.buffer = expecter.spawn.string_type()
    idx = expecter.new_data(previously_read)
    if idx is not None:
        return idx

    transport, pw = yield from asyncio.get_event_loop()\
        .connect_read_pipe(lambda: PatternWaiter(expecter), expecter.spawn)

    try:
        return (yield from asyncio.wait_for(pw.fut, timeout))
    except asyncio.TimeoutError as e:
        transport.pause_reading()
        return expecter.timeout(e)

class PatternWaiter(asyncio.Protocol):
    transport = None
    def __init__(self, expecter):
        self.expecter = expecter
        self.fut = asyncio.Future()
    
    def found(self, result):
        if not self.fut.done():
            self.fut.set_result(result)
            self.transport.pause_reading()
    
    def error(self, exc):
        if not self.fut.done():
            self.fut.set_exception(exc)
            self.transport.pause_reading()

    def connection_made(self, transport):
        self.transport = transport
    
    def data_received(self, data):
        spawn = self.expecter.spawn
        s = spawn._decoder.decode(data)
        spawn._log(s, 'read')

        if self.fut.done():
            spawn.buffer += s
            return

        try:
            index = self.expecter.new_data(s)
            if index is not None:
                # Found a match
                self.found(index)
        except Exception as e:
            self.expecter.errored()
            self.error(e)
    
    def eof_received(self):
        # N.B. If this gets called, async will close the pipe (the spawn object)
        # for us
        try:
            self.expecter.spawn.flag_eof = True
            index = self.expecter.eof()
        except EOF as e:
            self.error(e)
        else:
            self.found(index)
    
    def connection_lost(self, exc):
        if isinstance(exc, OSError) and exc.errno == errno.EIO:
            # We may get here without eof_received being called, e.g on Linux
            self.eof_received()
        elif exc is not None:
            self.error(exc)