static void copyfile(FILE *sf, copyfile_die_fn *sdie, const char *sxi,
FILE *df, copyfile_die_fn *ddie, const char *dxi,
uint64_t lstart, int amsender) {
static void copyfile(FILE *sf, copyfile_die_fn *sdie, const char *sxi,
FILE *df, copyfile_die_fn *ddie, const char *dxi,
uint64_t lstart, int amsender) {