Bug#754596: libc6 package upgrade sends ISO-2022 escape sequences to a terminal which doesn't support them (PuTTY in UTF-8 mode)
On Tue, 15 Jul 2014 22:49:18 +0200, Sven Joachim wrote:
> On 2014-07-12 23:30 +0200, Stephen Powell wrote:
>>
>> The problem occurs when libc6 must be upgraded during "apt-get upgrade"
>> or "apt-get dist-upgrade". I see a screen which looks like this:
>>
>> -----
>>
>> lqqqqqqqqqqqqqqqqqqqqqqqqu Configuring libc6:s390x tqqqqqqqqqqqqqqqqqqqqqqqqk
>> x Running services and programs that are using NSS need to be restarted, x
>> x otherwise they might not be able to do lookup or authentication any more x
>> x (for services such as ssh, this can affect your ability to login). x
>> x Please review the following space-separated list of init.d scripts for x
>> x services to be restarted now, and correct it if needed. x
>> x x
>> x Note: restarting sshd/telnetd should not affect any existing x
>> x connections. x
>> x x
>> x Services to restart for GNU libc library upgrade: x
>> x x
>> x vsftpd exim4 cron atd____________________________________________________ x
>> x x
>> x <Ok> x
>> x x
>> mqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqj
>>
>> -----
>>
>> As you can see, PuTTY was sent the traditional ISO-2022 box-drawing escape
>> sequences to draw the box, which does not work when PuTTY is operating in
>> UTF-8 mode. These need to be converted into equivalent UTF-8 sequences to
>> look right. I wish to emphasize that libc6 is the *only* package which does
>> this.
>
> Seems logical, see below.
>
>> If the bug is not in package libc6, then why is libc6 the *only* package
>> which doesn't use the proper box-drawing technique?
>
> Because your UTF-8 locale isn't available at the time the above screen
> is shown. It comes from the libc6 preinst, and libc6 declares a Breaks
> on the old locales package (see #585737 for details).
>
Sorry for the long delay in responding, Sven. I just now noticed your
update to the bug log. I get hundreds of e-mails per day. I must have
accidentally deleted yours before reading it.
I will try running "apt-get install locales" first from now on, before running
"apt-get upgrade" or "apt-get --purge dist-upgrade", and see if that helps.
--
.''`. Stephen Powell <zlinuxman@wowway.com>
: :' :
`. `'`
`-
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