Hi Alvaro,

Alvaro Herrera wrote:

> I started an aptitude safe-upgrade and left the computer for half an
> hour.  Upon return I find that there's a suspicious process eating 100%
> of a CPU for a long time.

Sorry for the long silence.  Let's see.

> /proc/pid/cmdline says:
>
> # cat cmdline 
> /usr/bin/perl-w/usr/share/debconf/frontend/var/lib/dpkg/info/dash.postinstabort-upgrade0.5.5.1-2.3

 - "prerm upgrade" and "prerm failed-upgrade" failed, or
 - "preinst upgrade" failed and "postrm abort-upgrade" succeeded, or
 - "postrm upgrade" and "postrm failed-upgrade" failed and
   "preinst abort-upgrade" and "postrm abort-upgrade" succeeded.

Which is to say, something went seriously wrong.

> strace'ing the process yields this:
[...]
> ioctl(0, SNDCTL_TMR_TIMEBASE or TCGETS, {B0 -opost -isig icanon -echo ...}) = > 0
> <repeats ad nauseam>

(isatty, I think.)

> Killing that process and doing an "aptitude install dash" reports this:
[...]
> dpkg: error processing /var/cache/apt/archives/dash_0.5.5.1-2.3_amd64.deb 
> (--unpack):
>  trying to overwrite `/bin/sh', which is also in package bash

At last, something simpler to understand.  Does a more recent version
of the dash package work?



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