EINVAL, // Invalid Paramater
ENOMEM, // No free memory
EACCES, // Not permitted
+ EBUSY, // Resource is busy
ENOTFOUND, // Item not found
EREADONLY, // Read only
ENOTIMPL, // Not implemented
EEXIST, // Already exists
ENFILE, // Too many open files
ENOTDIR, // Not a directory
+ EIO, // IO Error
EALREADY, // Operation was a NOP
EINTERNAL, // Internal Error