Add hostname to env

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

diff --git a/liblttng-ust/ltt-events.c b/liblttng-ust/ltt-events.c
index 2bc5a1597b3ed15812a543f78c60ddcaad7263ec..fd70279afb8451d99ad3c5ddc7b6facea20f4b43 100644 (file)
--- a/liblttng-ust/ltt-events.c
+++ b/liblttng-ust/ltt-events.c
@@ -1115,6 +1115,7 @@ int _ltt_session_metadata_statedump(struct ltt_session *session)
        struct ltt_event *event;
        int ret = 0;
        char procname[LTTNG_UST_PROCNAME_LEN] = "";
+       char hostname[HOST_NAME_MAX];
 
        if (!CMM_ACCESS_ONCE(session->active))
                return 0;
@@ -1171,10 +1172,15 @@ int _ltt_session_metadata_statedump(struct ltt_session *session)
                goto end;
 
        /* ignore error, just use empty string if error. */
+       hostname[0] = '\0';
+       ret = gethostname(hostname, sizeof(hostname));
+       if (ret && errno == ENAMETOOLONG)
+               hostname[HOST_NAME_MAX - 1] = '\0';
        lttng_ust_getprocname(procname);
        procname[LTTNG_UST_PROCNAME_LEN - 1] = '\0';
        ret = lttng_metadata_printf(session,
                "env {\n"
+               "       hostname = \"%s\";\n"
                "       vpid = %d;\n"
                "       procname = \"%s\";\n"
                "       domain = \"ust\";\n"
@@ -1183,6 +1189,7 @@ int _ltt_session_metadata_statedump(struct ltt_session *session)
                "       tracer_minor = %u;\n"
                "       tracer_patchlevel = %u;\n"
                "};\n\n",
+               hostname,
                (int) getpid(),
                procname,
                LTTNG_UST_MAJOR_VERSION,