fixed _tty_info() to properly discard daemons and their children, fixes #320

.tmux.conf

@@ -480,9 +480,13 @@ run -b '[ -z "#{window_active}" ] && [ -z "#{version}" ] && tmux set display-tim
 #         user[$2] = $1; parent[$2] = $3; child[$3] = $2
 #       }
 #       END {
-#         for (i in user)
+#         for (i in parent)
 #         {
-#           if (!(i in child) && parent[i] != 1)
+#           j = i
+#           while (parent[j])
+#             j = parent[j]
+#
+#           if (!(i in child) && j != 1)
 #           {
 #             file = "/proc/" i "/cmdline"; getline command < file; close(file)
 #             gsub(/\0/, " ", command)
@@ -500,7 +504,11 @@ run -b '[ -z "#{window_active}" ] && [ -z "#{version}" ] && tmux set display-tim
 #       END {
 #         for (i in parent)
 #         {
-#           if (!(i in child) && parent[i] != 1)
+#           j = i
+#           while (parent[j])
+#             j = parent[j]
+#
+#           if (!(i in child) && j != 1)
 #           {
 #             print i, user[i], command[i]
 #             exit