Gentoo Archives: gentoo-portage-dev

From: Michael Haubenwallner <haubi@g.o>
To: gentoo-portage-dev@l.g.o
Subject: Re: [gentoo-portage-dev] EbuildProcess logs poll-error to already removed $T (on AIX)
Date: Mon, 28 Mar 2011 10:06:51
Message-Id: 4D905D83.8060202@gentoo.org
In Reply to: Re: [gentoo-portage-dev] EbuildProcess logs poll-error to already removed $T (on AIX) by Zac Medico
1 On 03/25/2011 05:23 PM, Zac Medico wrote:
2 >> * EbuildProcess received strange poll event: 16384
3
4 > You can compare 16384 to the values of POLLERR and POLLNVAL in order to
5 > see what type of event it is. Apparently the values on AIX are different
6 > from those on Linux, because here's what I see on Linux:
7
8 On AIX 5.3 this is:
9
10 Python 2.7.1 (r271:86832, Feb 28 2011, 17:51:02)
11 [GCC 4.2.4 (Gentoo 4.2.4-r01.2 p1.1)] on aix5
12 Type "help", "copyright", "credits" or "license" for more information.
13 >>> import select
14 >>> dir(select)
15 ['PIPE_BUF', 'POLLERR', 'POLLHUP', 'POLLIN', 'POLLMSG', 'POLLNVAL', 'POLLOUT',
16 'POLLPRI', 'POLLRDBAND', 'POLLRDNORM', 'POLLWRBAND', 'POLLWRNORM', '__doc__',
17 '__file__', '__name__', '__package__', 'error', 'poll', 'select']
18 >>> select.POLLNVAL
19 32768
20 >>> select.POLLERR
21 16384
22
23 On AIX 6.1 it looks similar except for missing 'PIPE_BUF'.
24
25 > This will handle the IOError:
26 > http://git.overlays.gentoo.org/gitweb/?p=proj/portage.git;a=commit;h=0a64f784003c11e151405b7f708d77770de0ed57
27
28 Yes, that makes it work, thank you!
29
30 > It might be risky to skip logging of the POLLNVAL / POLLERR events, so
31 > hopefully we can determine their cause and handle them somehow. Do they
32 > seem to cause any problems? It might be something specific about pty
33 > devices on AIX.
34
35 There doesn't seem to go anything wrong so far.
36
37 I've no idea about programming with pty devices at all.
38 However, one relevant (IMHO) thing I can see is:
39 portage/util/_pty.py:_can_test_pty_eof() returns True for Linux only.
40
41 Anything I can try out?
42
43 Thank you!
44 /haubi/
45 --
46 Michael Haubenwallner
47 Gentoo on a different level

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