STRLITERALLEN
char path[STRLITERALLEN("/proc/") + INTTYPE_TO_STRLEN(pid_t) +
STRLITERALLEN("/setgroups") + 1];
ret = write_nointr(setgroups_fd, "deny\n", STRLITERALLEN("deny\n"));
if (ret != STRLITERALLEN("deny\n")) {
char path_ns[STRLITERALLEN("/proc/") + INTTYPE_TO_STRLEN(pid_t) +
STRLITERALLEN("/ns/user") + 1];