bdb

func CheckMagic ¶

func CheckMagic(ctx context.Context, r io.Reader) bool

CheckMagic looks at bit of the provided Reader to see if it looks like a BerkeleyDB file.

According to the libmagic database I looked at:

# Hash 1.85/1.86 databases store metadata in network byte order.
# Btree 1.85/1.86 databases store the metadata in host byte order.
# Hash and Btree 2.X and later databases store the metadata in host byte order.

Since this process can't (and doesn't want to) know the endian-ness of the layer's eventual host, we just look both ways for the one type we support.