Chapter 3. File I/OSection 3.1. IntroductionSection 3.2. File DescriptorsSection 3.3. open FunctionSection 3.4. creat FunctionSection 3.5. close FunctionSection 3.6. lseek FunctionSection 3.7. read FunctionSection 3.8. write FunctionSection 3.9. I/O EfficiencySection 3.10. File SharingSection 3.11. Atomic OperationsSection 3.12. dup and dup2 FunctionsSection 3.13. sync, fsync, and fdatasync FunctionsSection 3.14. fcntl FunctionSection 3.15. ioctl FunctionSection 3.16. /dev/fdSection 3.17. SummaryExercises