1. From Advanced Programming in the UNIX ® Environment, Third Edition, by W. Richard Stevens and Stephen A. Rago (ISBN-13: 978-0-321-63773-4). Copyright © 2013 by Pearson Education, Inc. All rights reserved.

6. Figure 15.6 (continues)

7. From Advanced Programming in the UNIX ® Environment, Third Edition, by W. Richard Stevens and Stephen A. Rago (ISBN-13: 978-0-321-63773-4). Copyright © 2013 by Pearson Education, Inc. All rights reserved.

13. Figure 15.12 (continues)

14. From Advanced Programming in the UNIX ® Environment, Third Edition, by W. Richard Stevens and Stephen A. Rago (ISBN-13: 978-0-321-63773-4). Copyright © 2013 by Pearson Education, Inc. All rights reserved. Figure 15.12 (continues)

15. From Advanced Programming in the UNIX ® Environment, Third Edition, by W. Richard Stevens and Stephen A. Rago (ISBN-13: 978-0-321-63773-4). Copyright © 2013 by Pearson Education, Inc. All rights reserved.

21. Figure 15.18 (continues)

22. From Advanced Programming in the UNIX ® Environment, Third Edition, by W. Richard Stevens and Stephen A. Rago (ISBN-13: 978-0-321-63773-4). Copyright © 2013 by Pearson Education, Inc. All rights reserved.