build and execute command lines from standard input

list directory contents

-f     Force each argument to be interpreted as a directory and list the name found in  each  slot.  This
       option  shall  turn  off -l, -t, -s, and -r, and shall turn on -a; the order is the order in which
       entries appear in the directory.

-1     (The numeric digit one.) Force output to be one entry per line.