ppmpat --version (return code: 0)
ppmpat: Using libpbm from Netpbm Version: Netpbm 10.0
ppmpat: BSD defined
ppmpat: RGB_ENV='RGBDEF'
ppmpat: RGBENV= 'RGBDEF' (env vbl is unset)
ppmpat -h (return code: 1)
usage: ppmpat -gingham|-g2|-gingham3|-g3|-madras|-tartan|-poles|-squig|-camo|-anticamo <width> <height>