[cs631apue] (无主题)

[kwang9]

Dear Tejas,

- you can iterator all entries twice, first time for maximum column 
length, then print.

- -d will print all entries of depth 0, e.g. roots of all file tree.

- -c,-x will override -l

- what fts does is a breadth first scanning, e.g. it visits all depth 0 
entires then all depth 1 entries and so on.
   if -R is specified, for each depth 0 entry, after fts visited all its 
depth 1 entries, it will visit every deeper entries till deepest.

Sincerely,
Kai