+ len = min(len, max_len);
+
+ /* Generate the characters in the name. */
+ for (int i = 0; i < len; i++) {
+ do {
+ name[i] = rand16();
+ } while (!is_valid_filename_char(name[i]));
+ }
+
+ /* Add a null terminator. */
+ name[len] = cpu_to_le16('\0');
+
+ return len;
+}
+
+/* The set of characters which are valid in short filenames. */
+static const char valid_short_name_chars[] = {
+ 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N',
+ 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
+ '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
+ '!', '#', '$', '%', '&', '\'', '(', ')', '-', '@', '^', '_', '`', '{',
+ '}', '~',
+ /* TODO: why doesn't Windows accept these characters? */
+ /* ' ', */
+ /*128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141,*/
+ /*142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155,*/
+ /*156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169,*/
+ /*170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183,*/
+ /*184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197,*/
+ /*198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211,*/
+ /*212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224, 225,*/
+ /*226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239,*/
+ /*240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253,*/
+ /*254, 255*/
+};
+
+static int
+generate_short_name_component(utf16lechar p[], int len)
+{
+ for (int i = 0; i < len; i++) {
+ char c = valid_short_name_chars[rand32() %
+ ARRAY_LEN(valid_short_name_chars)];
+ p[i] = cpu_to_le16(c);
+ }
+#if 0 /* TODO: we aren't using space yet anyway */
+ while (len > 1 && p[len - 1] == cpu_to_le16(' '))
+ len--;
+ if (p[len - 1] == cpu_to_le16(' '))
+ p[len - 1] = cpu_to_le16('A');
+#endif
+ return len;
+}
+
+/* Generate a random short (8.3) filename and return its length.
+ * The @name array must have length >= 13 (8 + 1 + 3 + 1). */
+static int
+generate_random_short_name(utf16lechar name[], struct generation_context *ctx)
+{
+ /*
+ * Legal short names on Windows consist of 1 to 8 characters, optionally
+ * followed by a dot then 1 to 3 more characters. Only certain
+ * characters are allowed. In addition, trailing spaces are not
+ * significant.
+ */
+ int base_len = 1 + (rand32() % 8);
+ int ext_len = rand32() % 4;
+ int total_len;
+
+ base_len = generate_short_name_component(name, base_len);
+
+ if (ext_len) {
+ name[base_len] = cpu_to_le16('.');
+ ext_len = generate_short_name_component(&name[base_len + 1],
+ ext_len);
+ total_len = base_len + 1 + ext_len;
+ } else {
+ total_len = base_len;
+ }
+ name[total_len] = cpu_to_le16('\0');
+ return total_len;