help file

void usage(const char *prog)
{
    printf ( "%s - convert RAW digital camera files to ACES\n", prog);
    printf ( "\n");
    printf ( "Usage:\n");  
    printf ( "  %s file ...\n", prog );
    printf ( "  %s [options] file\n", prog );
    printf ( "  %s --help\n", prog );
    printf ( "  %s --version\n", prog );
    printf ( "\n");
    printf ( "IDT options:\n"
             "  --help                  Show this screen\n"
             "  --verison               Show version\n"
             "  --wb-method [0-4] [str] White balance factor calculation method\n"
             "                            0=Calculate white balance from camera spec sens. Optional\n"
             "	                          string may be included to specify adopted white.\n"
             "                            1=Use file metadata for white balance\n"
             "                            2=Average the whole image for white balance\n"
             "                            3=Average a grey box for white balance <x y w h>\n"
             "                            4=Use custom white balance  <r g b g>\n"
             "                            (default = 0)\n"
             "  --mat-method [0-2]      IDT matrix calculation method\n"
             "                            0=Calculate matrix from camera spec sens\n"
             "                            1=Use file metadata color matrix\n"
             "                            2=Use adobe coeffs\n"
             // Future feature ? "        3=Use custom matrix <m1r m1g m1b m2r m2g m2b m3r m3g m3b>\n"
             "                            (default = 0)\n"
             "  --ss-path <path>        Specify the path to camera sensitivity data\n"
	     "				  (default = /usr/local/include/RAWTOACES/data/camera)\n"
             "  --exp-comp float        Set exposure compensation factor (default = 1.0)\n"
             "\n"
             "Raw conversion options:\n"
             "  -c float                Set adjust maximum threshold (default = 0.75)\n"
             "  -C <r b>                Correct chromatic aberration\n"
             "  -P <file>               Fix the dead pixels listed in this file\n"
             "  -K <file>               Subtract dark frame (16-bit raw PGM)\n"
             "  -k <num>                Set the darkness level\n"
	     "  -s <num>	        Set the saturation level\n"
             "  -n <num>                Set threshold for wavelet denoising\n"
             "  -H [0-9]                Highlight mode (0=clip, 1=unclip, 2=blend, 3+=rebuild) (default = 2)\n"
             "  -t [0-7]                Flip image (0=none, 3=180, 5=90CCW, 6=90CW)\n"
             "  -j                      Don't stretch or rotate raw pixels\n"
             "  -W                      Don't automatically brighten the image\n"
             "  -b <num>                Adjust brightness (default = 1.0)\n"
             "  -q [0-3]                Set the interpolation quality\n"
             "  -h                      Half-size color image (twice as fast as \"-q 0\")\n"
             "  -f                      Interpolate RGGB as four colors\n"
             "  -m <num>                Apply a 3x3 median filter to R-G and B-G\n"
             "  -s [0..N-1]             Select one raw image from input file\n"
             "  -G                      Use green_matching() filter\n"
             "  -B <x y w h>            Use cropbox\n"
             "\n"
             "Benchmarking options:\n"
             "  -v                      Verbose: print progress messages (repeated -v will add verbosity)\n"
             "  -F                      Use FILE I/O instead of streambuf API\n"
             "  -d                      Detailed timing report\n"
    #ifndef WIN32
             "  -E                      Use mmap()-ed buffer instead of plain FILE I/O\n"
    #endif
            );
    exit(1);
}

If users don't want to go with the method in which camera sensitivity data is available, what is the flag to go with the default process provided by "libraw"? I added "-z" yesterday, but if you prefer some others, I can update it quickly.