getevent: invalid option -?
Usage: getevent [-t] [-n] [-s switchmask] [-S] [-v [mask]] [-p] [-q] [-c count] [-r] [device]

    -t: show time stamps

    -n: don't print newlines

    -s: print switch states for given bits

    -S: print all switch states

    -v: verbosity mask (errs=1, dev=2, name=4, info=8, vers=16, pos. events=32)

    -p: show possible events (errs, dev, name, pos. events)

    -q: quiet (clear verbosity mask)

    -c: print given number of events then exit

    -r: print rate events are received
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