Chapter 12: System and Process Information

Exercise 12-1

My solution is in ex12_1.c.

1. To compile and link this solution, use make ex12_1.
2. To execute this solution, use ./ex12_1

The expected output is similar to:

    1811 systemd
    1812 (sd-pam)
    1825 gnome-keyring-d
    1829 gdm-x-session
    1831 Xorg

Exercise 12-2

My solution is in ex12_2.c.

1. To compile and link this solution, use make ex12_2.
2. To execute this solution, use ./ex12_2

The expected output is similar to:

** Unknown **
  ssh-agent
  cygtermd
    bash
      ex12_2

Exercise 12-3

My solution is in ex12_3.c.

1. To compile and link this solution, use make ex12_3.
2. Run tail -f Makefile from another terminal
3. To execute this solution, use ./ex12_3 Makefile in a different terminal to that in step 2.

The expected output is similar to:

PID: 9665, FD: 3