dst_s_fopen
if ((fp = dst_s_fopen(file, "w", 0600)) != NULL) {
if ((fp = dst_s_fopen(name, "r", 0)) == NULL) {
if ((fp = dst_s_fopen(filename, "w+", mode)) == NULL) {
if ((fp = dst_s_fopen(filename, "r", 0)) == NULL) {
FILE *dst_s_fopen (const char *filename, const char *mode, int perm);