- Copyright
- About The Author
- Acknowledgments
- Introduction
- Files and Directories
- Compiler Notes and Options
- UNIX File System Objects
- Error Handling and Reporting
- UNIX Input and Output
- File Locking
- Managing Files and Their Properties
- Directory Management
- Obtaining the Working Directory
- Changing the Current Directory
- Making a New Directory
- Removing a Directory
- Opening a Directory for Searching
- Closing a Directory
- Searching a Directory
- Rewinding to the Start of a Directory
- Saving Position Within a Directory
- Restoring Position Within a Directory
- Scanning a Directory
- Walking a Directory Structure
- Changing Your Root Directory
- Summary
- Temporary Files and Process Cleanup
- Library Functions
- UNIX Command-Line Processing
- Conversion Functions
- UNIX Date and Time Facilities
- User ID, Password, and Group Management
- Introduction to UNIX User Management
- The getuid(2) and geteuid(2) Functions
- The getgid(2) and getegid(2) Functions
- Real, Effective, and Saved User ID
- Setting User ID
- Setting Group ID
- The FreeBSD Function issetugid(2)
- The /etc/passwd File
- The Password Database Routines
- The Group Database
- Related Re-entrant Functions
- Supplementary Groups
- Summary
- Static and Shared Libraries
- Database Library Routines
- Advanced Concepts
- Index
Summary
This chapter has provided you with the background necessary to use the UNIX system calls select(2) and poll(2). Additionally, you will now be able to use non-blocking I/O, particularly for writing to a file descriptor in concert with select(2) or poll(2).
The next chapter will explore the wonderful world of UNIX timers.
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