strsuftoi64
Oflag = strsuftoi64("format", optarg, 0, 1, NULL);
sectorsize = strsuftoi64("sector size",
verbosity = strsuftoi64("verbose", optarg, 0, 4, NULL);
bsize = strsuftoi64("block size",
fsize = strsuftoi64("fragment size",
density = strsuftoi64("bytes per inode",
minfree = strsuftoi64("free space %",
num_inodes = strsuftoi64("number of inodes",
fssize = strsuftoi64("file system size",
static int64_t strsuftoi64(const char *, const char *, int64_t, int64_t, int *);