+int can_sleep_disk(const char *type) {
+ char *w, *state;
+ size_t l, k;
+ int r;
+ _cleanup_free_ char *p = NULL;
+
+ assert(type);
+
+ r = read_one_line_file("/sys/power/disk", &p);
+ if (r < 0)
+ return r == -ENOENT ? 0 : r;
+
+ k = strlen(type);
+ FOREACH_WORD_SEPARATOR(w, l, p, WHITESPACE, state) {
+ if (l == k && memcmp(w, type, l) == 0)
+ return true;
+
+ if (l == k + 2 && w[0] == '[' && memcmp(w + 1, type, l - 2) == 0 && w[l-1] == ']')
+ return true;
+ }
+
+ return false;
+}
+