+int
+eal_clean_runtime_dir(void)
+{
+ DIR *dir;
+ struct dirent *dirent;
+ int dir_fd, fd, lck_result;
+ static const char * const filters[] = {
+ "fbarray_*",
+ "mp_socket_*"
+ };
+
+ /* open directory */
+ dir = opendir(runtime_dir);
+ if (!dir) {
+ RTE_LOG(ERR, EAL, "Unable to open runtime directory %s\n",
+ runtime_dir);
+ goto error;
+ }
+ dir_fd = dirfd(dir);
+
+ /* lock the directory before doing anything, to avoid races */
+ if (flock(dir_fd, LOCK_EX) < 0) {
+ RTE_LOG(ERR, EAL, "Unable to lock runtime directory %s\n",
+ runtime_dir);
+ goto error;
+ }
+
+ dirent = readdir(dir);
+ if (!dirent) {
+ RTE_LOG(ERR, EAL, "Unable to read runtime directory %s\n",
+ runtime_dir);
+ goto error;
+ }
+
+ while (dirent != NULL) {
+ unsigned int f_idx;
+ bool skip = true;
+
+ /* skip files that don't match the patterns */
+ for (f_idx = 0; f_idx < RTE_DIM(filters); f_idx++) {
+ const char *filter = filters[f_idx];
+
+ if (fnmatch(filter, dirent->d_name, 0) == 0) {
+ skip = false;
+ break;
+ }
+ }
+ if (skip) {
+ dirent = readdir(dir);
+ continue;
+ }
+
+ /* try and lock the file */
+ fd = openat(dir_fd, dirent->d_name, O_RDONLY);
+
+ /* skip to next file */
+ if (fd == -1) {
+ dirent = readdir(dir);
+ continue;
+ }
+
+ /* non-blocking lock */
+ lck_result = flock(fd, LOCK_EX | LOCK_NB);
+
+ /* if lock succeeds, remove the file */
+ if (lck_result != -1)
+ unlinkat(dir_fd, dirent->d_name, 0);
+ close(fd);
+ dirent = readdir(dir);
+ }
+
+ /* closedir closes dir_fd and drops the lock */
+ closedir(dir);
+ return 0;
+
+error:
+ if (dir)
+ closedir(dir);
+
+ RTE_LOG(ERR, EAL, "Error while clearing runtime dir: %s\n",
+ strerror(errno));
+
+ return -1;
+}
+
+