[PATCH v2] Allow -q to be repeated for very quiet output
dvlasenk at redhat.com
Thu May 23 13:42:54 UTC 2013
On 05/18/2013 01:11 AM, Dmitry V. Levin wrote:
> On Fri, May 17, 2013 at 10:13:46AM +0200, Denys Vlasenko wrote:
>> On 05/13/2013 12:30 PM, Daniel P. Berrange wrote:
>>> From: "Daniel P. Berrange" <berrange at redhat.com>
>>> Even with the -q flag specified, tracing output is still mixed
>>> with messages about signals and process exit status, which is
>>> often irrelevant. Allow the -q flag to be repeated to force
>>> the suppression of signals / exit status info too.
>> I would say that this is a bit arbitrary to think
>> that signals are "not relevant". In many cases,
>> they are!
>> The suppression done by -q was suppressing messages about
>> what _strace_ does, those messages had nothing to do with
>> _what happens to the traced process_.
>> Your new addition suppressed signal delivery log messages,
>> and that is something which _does happen to the process_
>> being traced.
>> Also, your addition is unnecessary because "-e signal=!all"
>> does the same thing.
> What about exit status info? The only way to suppress this kind
> of messages before the patch was -c option.
That makes sense.
So, should we remove signal suppression by -qq.
More information about the Strace-devel