40341af448
This changes file descriptors from uint32 to int32 and the corresponding file table to reject negative values. This ensures invalid values aren't mistaken for very large descriptor entries, which can use a lot of memory as the table implementation isn't designed to be sparse. See https://pubs.opengroup.org/onlinepubs/9699919799/functions/dirfd.html#tag_16_90 Signed-off-by: Adrian Cole <adrian@tetrate.io>