input,f,a,,,,input file output,s,a,seg,,,root name for output (segment) files nlines,i,h,1000,1,,maximum number of lines of text per segment file nbytes,i,h,16384,1,,maximum number of bytes per segment file maxfiles,i,h,999,,,maximum number of output files verbose,b,h,yes,,,print output file names and sizes as they are generated