[lttng-dev] LTTNG_ENABLE_EVENT lsm cmd type?

Thibault, Daniel Daniel.Thibault at drdc-rddc.gc.ca
Thu Jul 4 13:05:46 EDT 2013

-----Message d'origine-----
Date: Thu, 4 Jul 2013 16:27:25 +0000
From: "Thibault, Daniel" <Daniel.Thibault at drdc-rddc.gc.ca>
To: "lttng-dev at lists.lttng.org" <lttng-dev at lists.lttng.org>

   [...] what strikes me as odd is the lsm cmd type value: it is LTTNG_ENABLE_EVENT (6) in both cases.  Shouldn't it rather be LTTNG_ENABLE_ALL_EVENT (7)?  This lsm cmd type assignation occurs in only one place, lttng-tools/src/lib/lttng-ctl/lttng-ctl.c:685:

	if (ev->name[0] != '\0') {
		lsm.cmd_type = LTTNG_ENABLE_EVENT;
	} else {
		lsm.cmd_type = LTTNG_ENABLE_ALL_EVENT;

   Since the command was 'lttng enable-event -a -u', one would expect ev->name[0] to indeed be '\0', so what's going on?
-----Fin du message d'origine-----

   I added a DBG statement and promptly found out that lttng-ctl.c's test should be:

	if (ev->name[0] != '*') {

   Because lttng_enable_event receives ev->name == "*" , not "".

Daniel U. Thibault
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