disksum
for (i = 0; disksum(i++) && i < MAX_CKSUMLEN; )
static int disksum(int);
for (i = 0; disksum(i++) && i < MAX_CKSUMLEN; )
static int disksum(int);
for (i = 0; disksum(i++) && i < MAX_CKSUMLEN; )
static int disksum(int);