+static void create_work_dirs(struct thread_data *td, const char *fname)
+{
+ char path[PATH_MAX];
+ char *start, *end;
+ int dirfd;
+ bool need_close = true;
+
+ if (td->o.directory) {
+ dirfd = open(td->o.directory, O_DIRECTORY | O_RDONLY);
+ if (dirfd < 0) {
+ log_err("fio: failed to open dir (%s): %d\n",
+ td->o.directory, errno);
+ assert(0);
+ }
+ } else {
+ dirfd = AT_FDCWD;
+ need_close = false;
+ }
+
+ memcpy(path, fname, PATH_MAX);
+ start = end = path;
+ while ((end = strchr(end, FIO_OS_PATH_SEPARATOR)) != NULL) {
+ if (end == start)
+ break;
+ *end = '\0';
+ errno = 0;
+ if (mkdirat(dirfd, start, 0600) && errno != EEXIST) {
+ log_err("fio: failed to create dir (%s): %d\n",
+ start, errno);
+ assert(0);
+ }
+ *end = FIO_OS_PATH_SEPARATOR;
+ end++;
+ }
+ if (need_close)
+ close(dirfd);
+ td->flags |= TD_F_DIRS_CREATED;
+}
+