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Re: [libvirt] [PATCH] daemon: Fix LIBVIRT_DEBUG=1 default output

On 10/24/2012 03:47 PM, Eric Blake wrote:
> On 10/24/2012 03:01 PM, Cole Robinson wrote:
>> This commit changes the behavior of LIBVIRT_DEBUG=1 libvirtd:
>> $ git show 7022b09111d4322d21396a70d58320a9ad773962
>> commit 7022b09111d4322d21396a70d58320a9ad773962
>> Author: Daniel P. Berrange <berrange redhat com>
>> Date:   Thu Sep 27 13:13:09 2012 +0100
>>     Automatically enable systemd journal logging
>>     Probe to see if the systemd journal is accessible, and if
>>     so enable logging to the journal by default, rather than
>>     stderr (current default under systemd).
>> Previously  'LIBVIRT_DEBUG=1 /usr/sbin/libvirtd' would show all debug
>> output to stderr, now it send debug output to the journal.
>> Only use the journal by default if running in daemon mode, or
>> if stdin is _not_ a tty. This should make libvirtd launched from
>> systemd use the journal, but preserve the old behavior in most
>> situations.
> Makes sense.

Thinking about it a bit more, should we be checking if stderr, rather
than stdin, is a ttty?  That is, if you run 'libvirtd </dev/null' from a
terminal, don't you still want output to the stderr tty?

Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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