We do this by using a trick: library-internal log categories use
negative subsystem numbers, which are converted into positive
array indexes at the time of logging.
library-internal log categories need to be knwo at compile-time,
while application-specified categories now are of unlimited number,
as they are dynamically allocated.
Harald reported a problem in the logging:
http://lists.osmocom.org/pipermail/openbsc/2011-May/002896.html
Reverting 81e9636454 seems to
fix the problem. However, that workaround looks ugly.
Holger gives us another clue on what was wrong:
http://lists.osmocom.org/pipermail/openbsc/2011-May/002905.html
While digging in the manpage, I found this:
"The functions vprintf(), vfprintf(), vsprintf(), vsnprintf()
are equivalent to the functions printf(), fprintf(), sprintf(),
snprintf(), respectively, except that they are called with a
va_list instead of a variable number of arguments. These functions
do not call the va_end macro. Consequently, the value of ap is
undefined after the call. The application should call va_end(ap)
itself afterwards."
This patch removes a workaround to fix some strange memory corruption
now that _output() has been completely reworked and we make use of
snprintf appropriately.
This patch reworks _output() to handle snprintf() return value
appropriately and to use one single buffer to build the logging
string, instead of four.
OpenBSC> logging level
all Global setting for all subsystems <----- this description was missing
rll A-bis Radio Link Layer (RLL)
[...]
This problem was introduced by myself in:
"vty: integration with logging framework"
04139f14b6
This patch moves all GSM-specific definitions to include/osmocom/gsm.
Moreover, the headers in include/osmocore/ have been moved to
include/osmocom/core.
This has been proposed by Harald Welte and Sylvain Munaunt.
Tested with `make distcheck'.
Signed-off-by: Pablo Neira Ayuso <pablo@gnumonks.org>
The logging categories are registered by the applications, like
osmo-nitb, during startup. Thus, the VTY have to provide the logging
commands according to the logging categories that the application
has registered.
Before this patch, the VTY contained the logging categories
hardcoded. Thus, any change in the logging categories by the
application would not be shown by the VTY.
So far, this was not a problem because all applications used the
same logging categories. However, according to what Harald told
me, this may be a problem in the future.
This patch resolve the lack of integration between the logging
framework and the VTY by generating the VTY logging commands
from the logging categories registered.
Since this patch changes one function of the libosmocore API,
it follows another patch for the openbsc application to get in
sync with the new function layout.
I have reworked and renamed the functions:
* log_vty_category_string()
* log_vty_level_string()
to provide the new ones that generate the exact output that VTY
requires.
This patch does not release the memory allocated by
talloc_zero_size() to store the VTY strings for the commands
and the description. I found no exit function that can clean
up resources that were allocated.
Before this patch, there was a bug in the code caused by a memcpy
from one data structure to another. unfortuantely the data structures
were not the same, so we have to explicitly iterate over the array
and assign the structure members manually.
Harald Welte
Pablo Neira Ayuso
Sylvain Munaut