+ int err = errs[j];
+ char buf2[sizeof buf] = "";
+ size_t len;
+ size_t i;
+
+ strerror_r (err, buf2, sizeof buf2);
+ len = strlen (buf2);
+ ASSERT (len < sizeof buf);
+
+ for (i = 0; i <= len; i++)
+ {
+ memset (buf, '^', sizeof buf - 1);
+ errno = 0;
+ ret = strerror_r (err, buf, i);
+ ASSERT (errno == 0);
+ if (err < 0)
+ ASSERT (ret == ERANGE || ret == EINVAL);
+ else
+ ASSERT (ret == ERANGE);
+ if (i)
+ {
+ ASSERT (strncmp (buf, buf2, i - 1) == 0);
+ ASSERT (buf[i - 1] == '\0');
+ }
+ ASSERT (strspn (buf + i, "^") == sizeof buf - 1 - i);
+ }
+