| A diagnostic results if the contents differ, otherwise |
| Print the byte number (decimal) and the |
| differing bytes (hexadecimal) for each difference. |
| Print nothing for differing files, |
| Print the line number of the first differing byte. |
| comparison starts at the designated byte position |
| of the corresponding file. |
| octal; with anything else, decimal. |
| If a file is inaccessible or missing, the exit status is |
| If the files are the same, the exit status is empty (true). |
| If they are the same except that one is longer than the other, the exit status is |
| reports the position of the first disagreeing byte and the exit status is |
