strace(1) on Linux
The text 6593c07d36fb, as Debian 8 (Jessie) shipped it.
trace system calls and signals
Flags it lists
-
-C -
-D -
-E -
-F -
-I -
-O -
-P -
-S -
-T -
-V -
-a -
-b -
-c -
-d -
-e -
-f -
-ff -
-h -
-i -
-k -
-o -
-p -
-q -
-qq -
-r -
-s -
-t -
-tt -
-ttt -
-u -
-v -
-w -
-x -
-xx -
-y