[ltt-dev] [UST PATCH] Include trace name in output directory name

[Nils Carlson]

On Nov 9, 2010, at 5:37 PM, David Goulet wrote:

> How about we put the trace name in front and don't have the PID as  
> the first value and STOP having multiple traces beginning with  
> numbers that make things quite confusing in a long term and painful  
> to identify the good trace ?
>

Yep, maybe it's best to really do something about the order...

What about doing date prefixing followed by the trace name and if  
necessary followed by a seq nr?

Something like

20101109-152301-auto
20101109-152301-auto_1 (in case of collision?)

We might also consider putting the actual application name (the first  
stripped token of argv[0] in there?

/Nils



> David
>
> On 10-11-08 10:34 AM, Nils Carlson wrote:
>> Include the name of the trace to the output directory created by
>> ustd. Yet another part of multi-session support.
>>
>> Signed-off-by: Nils Carlson<nils.carlson at ericsson.com>
>> ---
>>  ustd/ustd.c |   12 ++++++------
>>  1 files changed, 6 insertions(+), 6 deletions(-)
>>
>> diff --git a/ustd/ustd.c b/ustd/ustd.c
>> index e75fd9d..3f63457 100644
>> --- a/ustd/ustd.c
>> +++ b/ustd/ustd.c
>> @@ -191,9 +191,9 @@ int on_open_buffer(struct libustd_callbacks  
>> *data, struct buffer_info *buf)
>>  		trace_path = USTD_DEFAULT_TRACE_PATH;
>>  	}
>>
>> -	if (asprintf(&tmp, "%s/%u_%lld", trace_path, buf->pid, buf- 
>> >pidunique)<  0) {
>> -		ERR("on_open_buffer : asprintf failed (%s/%u_%lld)",
>> -		    trace_path, buf->pid, buf->pidunique);
>> +	if (asprintf(&tmp, "%s/%u_%s_%lld", trace_path, buf->pid, buf- 
>> >trace, buf->pidunique)<  0) {
>> +		ERR("on_open_buffer : asprintf failed (%s/%u_%s_%lld)",
>> +		    trace_path, buf->pid, buf->trace, buf->pidunique);
>>  		return 1;
>>  	}
>>  	result = create_dir_if_needed(tmp);
>> @@ -204,9 +204,9 @@ int on_open_buffer(struct libustd_callbacks  
>> *data, struct buffer_info *buf)
>>  	}
>>  	free(tmp);
>>
>> -	if (asprintf(&tmp, "%s/%u_%lld/%s", trace_path, buf->pid, buf- 
>> >pidunique, buf->name)<  0) {
>> -		ERR("on_open_buffer : asprintf failed (%s/%u_%lld/%s)",
>> -		    trace_path, buf->pid, buf->pidunique, buf->name);
>> +	if (asprintf(&tmp, "%s/%u_%s_%lld/%s", trace_path, buf->pid, buf- 
>> >trace, buf->pidunique, buf->name)<  0) {
>> +		ERR("on_open_buffer : asprintf failed (%s/%u_%s_%lld/%s)",
>> +		    trace_path, buf->pid, buf->trace, buf->pidunique, buf->name);
>>  		return 1;
>>  	}
>>  	result = fd = open(tmp, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL,  
>> 00600);
>
> -- 
> David Goulet
> LTTng project, DORSAL Lab.
>
> PGP/GPG : 1024D/16BD8563
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>
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