ZPOOL_HIST_CMD
if (nvlist_exists(events[i], ZPOOL_HIST_CMD)) {
fnvlist_lookup_string(events[i], ZPOOL_HIST_CMD));
if (nvlist_exists(rec, ZPOOL_HIST_CMD)) {
fnvlist_lookup_string(rec, ZPOOL_HIST_CMD));
if (nvlist_lookup_string(nvl, ZPOOL_HIST_CMD, &string) == 0)
if (nvlist_exists(nvl, ZPOOL_HIST_CMD)) {
fnvlist_lookup_string(nvl, ZPOOL_HIST_CMD));
nvlist_exists(nvl, ZPOOL_HIST_CMD)) {
fnvlist_add_string(nvl, ZPOOL_HIST_CMD, msg);