From a605814333fe405404f42d5e5de51db234a538fe Mon Sep 17 00:00:00 2001 From: Mathieu Desnoyers Date: Sun, 26 Aug 2012 20:23:21 -0400 Subject: [PATCH] Add env hostname information Approximation in case of hostname change or in case of contextualisation, but it does the job for 95% of use-cases. Signed-off-by: Mathieu Desnoyers --- lttng-events.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/lttng-events.c b/lttng-events.c index bbff1c9d..7a1be729 100644 --- a/lttng-events.c +++ b/lttng-events.c @@ -903,6 +903,7 @@ int _lttng_session_metadata_statedump(struct lttng_session *session) unsigned char uuid_s[37], clock_uuid_s[BOOT_ID_LEN]; struct lttng_channel *chan; struct lttng_event *event; + char hostname[__NEW_UTS_LEN + 1]; int ret = 0; if (!ACCESS_ONCE(session->active)) @@ -959,8 +960,14 @@ int _lttng_session_metadata_statedump(struct lttng_session *session) if (ret) goto end; + rcu_read_lock(); + memcpy(hostname, task_nsproxy(current)->uts_ns->name.nodename, + sizeof(hostname)); + rcu_read_unlock(); + ret = lttng_metadata_printf(session, "env {\n" + " hostname = \"%s\";\n" " domain = \"kernel\";\n" " sysname = \"%s\";\n" " kernel_release = \"%s\";\n" @@ -970,6 +977,7 @@ int _lttng_session_metadata_statedump(struct lttng_session *session) " tracer_minor = %d;\n" " tracer_patchlevel = %d;\n" "};\n\n", + hostname, utsname()->sysname, utsname()->release, utsname()->version, -- 2.34.1