What causes showmount -e to display the following?

/tmp *

as opposed to

/tmp (everyone)

for an exports file:

/tmp *(various options..)

This is apparently being printed from here (according to grouplist being null or not):

while (exportlist) {
printf("%-*s ", maxlen, exportlist->ex_dir);
grouplist = exportlist->ex_groups;
if (grouplist)
while (grouplist) {
printf("%s%s", grouplist->gr_name,
grouplist->gr_next ? "," : "");
grouplist = grouplist->gr_next;
}
else
printf("(everyone)");
printf("\n");
exportlist = exportlist->ex_next;
}

Also looking for a definitive answer, though it seems that "*" is displayed for a single export rule and "(everone)" is displayed for exports with multiple rules that include a general catchall.

That almost seems opposite the code snippet above.