SARMAG
char magic[SARMAG];
if (fread(magic, SARMAG, 1, arch) != 1 ||
strncmp(magic, ARMAG, SARMAG) != 0) {
char magic[SARMAG];
if (fread(magic, SARMAG, 1, arch) != 1 ||
strncmp(magic, ARMAG, SARMAG) != 0) {