}
}
+int readlink_and_make_absolute(const char *p, char **r) {
+ char *target, *k;
+ int j;
+
+ assert(p);
+ assert(r);
+
+ if ((j = readlink_malloc(p, &target)) < 0)
+ return j;
+
+ k = file_in_same_dir(p, target);
+ free(target);
+
+ if (!k)
+ return -ENOMEM;
+
+ *r = k;
+ return 0;
+}
+
char *file_name_from_path(const char *p) {
char *r;
path_startswith(path, "/sys/");
}
+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();
+}
+
static const char *const ioprio_class_table[] = {
[IOPRIO_CLASS_NONE] = "none",
[IOPRIO_CLASS_RT] = "realtime",