| 1.1 | Verify on your system that the directories dot and dot-dot are not the same, except in the root directory. |
| 1.2 | In the output from the program in Figure 1.6, what happened to the processes with process IDs 852 and 853? |
| 1.3 | In Section 1.7, the argument to perror is defined with the ISO C attribute const, whereas the integer argument to strerror isn't defined with this attribute. Why? |
| 1.4 | In the error-handling function err_sys in Appendix B, why is the value of errno saved when the function is called? |
| 1.5 | If the calendar time is stored as a signed 32-bit integer, in what year will it overflow? What ways can be used to extend the overflow point? Are they compatible with existing applications? |
| 1.6 | If the process time is stored as a signed 32-bit integer, and if the system counts 100 ticks per second, after how many days will the value overflow? |
