Hi Karel, $ printf "%s\n%s\n" "a 1 0" "b 0 1" | column --table-columns=NAME,ID,PARENT --tree NAME --tree-id ID --tree-parent PARENT Segmentation fault (core dumped) I'm not sure what the command should do in this case. Maybe print some sort of symbol of circle, such as below?? NAME ID PARENT a 1 0 ( ) b 0 1 The easiest option is to print complaint about circular input. IMHO such complaint should inform ID & PARENT fields are in question to make users life a little easier. -- Sami Kerola http://www.iki.fi/kerolasa/ -- To unsubscribe from this list: send the line "unsubscribe util-linux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
