Support other attributes about metastore HOT 1 OPEN

Thank you for your interest in metastore, all credits go to original author, David.

From metadata perspective I think there is limited value in storing atime or ctime. ctime is also not easy to apply, as you possibly already noticed. I can see why some would want to keep track of size, but size cannot be applied (at least not in non-destructive way if file would need to get smaller).

BTW long is a bad choice for keeping size, it wouldn't fit bigger files on 32-bit systems and some 64-bit systems (ILP32, LLP64). off_t would be better, but you would need to compile program with -D_FILE_OFFSET_BITS=64. Actually you need to compile with this define anyway (unless you're using musl libc), otherwise stat family of functions fail with EOVERFLOW for 2GB+ files.

from metastore.