Function updateMetaField

cmd/bbolt/command/command_surgery_meta.go:194–231

(m *common.Meta, fields map[string]uint64)

}

func updateMetaField(m *common.Meta, fields map[string]uint64) bool {
	changed := false
	for key, val := range fields {
		switch key {
		case metaFieldPageSize:
			m.SetPageSize(uint32(val))
		case metaFieldRoot:
			m.SetRootBucket(common.NewInBucket(common.Pgid(val), 0))
		case metaFieldFreelist:
			m.SetFreelist(common.Pgid(val))
		case metaFieldPgid:
			m.SetPgid(common.Pgid(val))
		}

		changed = true
	}

	if m.Magic() != common.Magic {
		m.SetMagic(common.Magic)
		changed = true
	}
	if m.Version() != common.Version {
		m.SetVersion(common.Version)
		changed = true
	}
	if m.Flags() != common.MetaPageFlag {
		m.SetFlags(common.MetaPageFlag)
		changed = true
	}

	newChecksum := m.Sum64()
	if m.Checksum() != newChecksum {
		m.SetChecksum(newChecksum)
		changed = true
	}

	return changed
}

func ReadMetaPageAt(dbPath string, metaPageId uint32, pageSize uint32) (*common.Meta, []byte, error) {
	if metaPageId > 1 {