gunzip.c contains the snippets: #define GUNZIP_OPT_STDOUT 1 #define GUNZIP_OPT_FORCE 2 #define GUNZIP_OPT_TEST 4 #define GUNZIP_OPT_DECOMPRESS 8 <--- ?? and opt = bb_getopt_ulflags(argc, argv, "cftd"); <-- "d" ?? but i don't see where that "d" option is being processed and it's not documented online. dead code? rday