-display displayname
This option specifies the X server to contact.
-a
This option indicates that clients on all screens should be listed. By default, only those clients on the default screen are listed.
-l
List in long format, giving the window name, icon name, and class hints in addition to the machine name and command string shown in the default format.
-m maxcmdlen
This option specifies the maximum number of characters in a command to print out. The default is 10000.