+int dir_is_empty(const char *path) {
+ DIR *d;
+ int r;
+ struct dirent buf, *de;
+
+ if (!(d = opendir(path)))
+ return -errno;
+
+ for (;;) {
+ if ((r = readdir_r(d, &buf, &de)) > 0) {
+ r = -r;
+ break;
+ }
+
+ if (!de) {
+ r = 1;
+ break;
+ }
+
+ if (!ignore_file(de->d_name)) {
+ r = 0;
+ break;
+ }
+ }
+
+ closedir(d);
+ return r;
+}
+
+unsigned long long random_ull(void) {
+ int fd;
+ uint64_t ull;
+ ssize_t r;
+
+ if ((fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY)) < 0)
+ goto fallback;
+
+ r = loop_read(fd, &ull, sizeof(ull));
+ close_nointr_nofail(fd);
+
+ if (r != sizeof(ull))
+ goto fallback;
+
+ return ull;
+
+fallback:
+ return random() * RAND_MAX + random();
+}
+
+void rename_process(const char name[8]) {
+ assert(name);
+
+ prctl(PR_SET_NAME, name);
+
+ /* This is a like a poor man's setproctitle(). The string
+ * passed should fit in 7 chars (i.e. the length of
+ * "systemd") */
+
+ if (program_invocation_name)
+ strncpy(program_invocation_name, name, strlen(program_invocation_name));
+}
+
+void sigset_add_many(sigset_t *ss, ...) {
+ va_list ap;
+ int sig;
+
+ assert(ss);
+
+ va_start(ap, ss);
+ while ((sig = va_arg(ap, int)) > 0)
+ assert_se(sigaddset(ss, sig) == 0);
+ va_end(ap);
+}
+