brltty --version (return code: 0)
BRLTTY 5.3.1 rev BRLTTY-5.3.1 [http://brltty.com/]
brltty: Log Level: none
brltty: Copyright (C) 1995-2015 by The BRLTTY Developers.
brltty: BrlAPI Server: release 0.6.4
brltty: Copyright (C) 2002-2015 by Sébastien Hinderer <Sebastien.Hinderer@ens-lyon.org>, Samuel Thibault <samuel.thibault@ens-lyon.org>
brltty --help (return code: 0)
Usage: brltty [option ...]
-f file --configuration-file= Path to default settings file.
-A name=value,... --api-parameters= Parameters for the application
programming interface.
-b driver,... --braille-driver= Braille driver code (auto, no, or
one of {al at ba bc bd bl bm bn cb
ce ec eu fs hd hm ht hw ir lt mb md
mm mn mt np pg pm sk tn ts tt vd vo
vr vs xw bg}).
-B name=value,... --braille-parameters= Parameters for the braille driver.
-d identifier,... --braille-device= Device for accessing braille
display.
-t file --text-table= Name of or path to text table (or
auto).
-a file --attributes-table= Name of or path to attributes table.
-c file --contraction-table= Name of or path to contraction
table.
-k file --keyboard-table= Name of or path to keyboard table.
-s driver,... --speech-driver= Speech driver code (auto, no, or one
of {al bl cb es fl fv gs sd xs}).
-S name=value,... --speech-parameters= Parameters for the speech driver.
-Q --quiet-if-no-braille Do not autospeak when braille is not
being used.
-x driver,... --screen-driver= Screen driver code (auto, no, or one
of {lx sc a2}).
-X name=value,... --screen-parameters= Parameters for the screen driver.
-q --quiet Suppress start-up messages.
-v --verify Write the start-up logs, and then
exit.
-V --version Log the versions of the core, API,
and built-in drivers, and then exit.
-h --help Print a usage summary (commonly used
options only), and then exit.
-H --full-help Print a usage summary (all options),
and then exit.