Function pagesFunc

cmd/bbolt/command/command_pages.go:44–93

(cmd *cobra.Command, dbPath string)

}

func pagesFunc(cmd *cobra.Command, dbPath string) error {
	if _, err := checkSourceDBPath(dbPath); err != nil {
		return err
	}

	// Open database.
	db, err := bolt.Open(dbPath, 0600, &bolt.Options{
		ReadOnly:        true,
		PreLoadFreelist: true,
	})
	if err != nil {
		return err
	}
	defer db.Close()

	// Write header.
	fmt.Fprintln(cmd.OutOrStdout(), "ID       TYPE       ITEMS  OVRFLW")
	fmt.Fprintln(cmd.OutOrStdout(), "======== ========== ====== ======")

	return db.View(func(tx *bolt.Tx) error {
		var id int
		for {
			p, err := tx.Page(id)
			if err != nil {
				return &PageError{ID: id, Err: err}
			} else if p == nil {
				break
			}

			// Only display count and overflow if this is a non-free page.
			var count, overflow string
			if p.Type != "free" {
				count = strconv.Itoa(p.Count)
				if p.OverflowCount > 0 {
					overflow = strconv.Itoa(p.OverflowCount)
				}
			}

			// Print table row.
			fmt.Fprintf(cmd.OutOrStdout(), "%-8d %-10s %-6s %-6s\n", p.ID, p.Type, count, overflow)

			// Move to the next non-overflow page.
			id += 1
			if p.Type != "free" {
				id += p.OverflowCount
			}
		}
		return nil
	})
}