+int is_directory(const char *path) {
+ struct stat statbuf;
+ if (stat(path, &statbuf) != 0) {
+ fprintf(stderr, "cannot get source directory status: %s\n", path);
+ return -1;
+ }
+
+ if (!S_ISDIR(statbuf.st_mode)) {
+ fprintf(stderr, "source directory must be a directory: %s\n", path);
+ return -1;
+ }
+
+ return 1;
+}
+
+int is_regular_file(const char *path) {
+ struct stat statbuf;
+ if (stat(path, &statbuf) != 0) {
+ return -1;
+ }
+
+ if (!S_ISREG(statbuf.st_mode)) {
+ return -1;
+ }
+
+ return 1;
+}
+