dcraw -w -T -6 -q 0 <input>   # sRGB
dcraw -a -T -6 -q 0 <input>    # auto WB
dcraw -w -T -6 -q 0 -o 2 <input>    # Adobe RGB
dcraw -w -T -6 -q 0 -b 0.8 <input>   # sRGB 80% 
rawtherapee-cli -q -d -t -b16 -Y -c <input>
darktable-cli <input> <output>