dumpkeys --version (return code: 0)
dumpkeys from kbd 1.15.5
dumpkeys --help (return code: 1)
dumpkeys version 1.15.5
usage: dumpkeys [options...]
valid options are:
-h --help display this help text
-i --short-info display information about keyboard driver
-l --long-info display above and symbols known to loadkeys
-n --numeric display keytable in hexadecimal notation
-f --full-table don't use short-hand notations, one row per keycode
-1 --separate-lines one line per (modifier,keycode) pair
--funcs-only display only the function key strings
--keys-only display only key bindings
--compose-only display only compose key combinations
-c --charset=iso-8859-{1,2,3,4,5,7,8,9,10,15},koi8-{r,u},mazovia,cp-1250,tis-620,iso-10646-18,iso-ir-197,iso-ir-209
interpret character action codes to be from the
specified character set