Advanced UNIX Programming

Preface.


1 Fundamental Concepts.


A Whirlwind Tour of UNIX and Linux. Versions of UNIX. Using System Calls. Error Handling. UNIX Standards. Common Header File. Dates and Times. About the Example Code. Essential Resources.



2. Basic File I/O.


Introduction to File I/O. File Descriptors and Open File Descriptions. Symbols for File Permission Bits. open and creat System Calls. umask System Call. unlink System Call. Creating Temporary Files. File Offsets and O_APPEND. write System Call. read System Call. close System Call. User Buffered I/O. lseek System Call. pread and pwrite System Calls. readv and writev System Calls. Synchronized I/O. truncate and ftruncate System Calls.



3. Advanced File I/O.


Introduction. Disk Special Files and File Systems. Hard and Symbolic Links. Pathnames. Accessing and Displaying File Metadata. Directories. Changing an I-Node. More File-Manipulation Calls. Asynchronous I/O.



4. Terminal I/O.


Introduction. Reading from a Terminal. Sessions and Process Groups (Jobs). ioctl System Call. Setting Terminal Attributes. Additional Terminal-Control System Calls. Terminal-Identification System Calls. Full-Screen Applications. STREAMS I/O. Pseudo Terminals.



5. Processes and Threads.


Introduction. Environment. exec System Calls. Implementing a Shell (Version 1). fork System Call. Implementing a Shell (Version 2). exit System Calls and Process Termination. wait, waitpid, and waitid System Calls. Signals, Termination, and Waiting. Implementing a Shell (Version 3). Getting User and Group Ids. Setting User and Group Ids. Getting Process Ids. chroot System Call. Getting and Setting the Priority. Process Limits. Introduction to Threads. The Blocking Problem.



6. Basic Interprocess Communication.


Introduction. Pipes. dup and dup2 System Calls. A Real Shell. Two-Way Communication with Unidirectional Pipes. Two-Way Communication with Bidirectional Pipes.



7. Advanced Interprocess Communication.


Introduction. FIFOs, or Named Pipes. An Abstract Simple Messaging Interface (SMI). System V IPC (Interprocess Communication). System V Message Queues. POSIX IPC. POSIX Message Queues. About Semaphores. System V Semaphores. POSIX Semaphores. File Locking. About Shared Memory. System V Shared Memory. POSIX Shared Memory. Performance Comparisons.



8. Networking and Sockets.


Socket Basics. Socket Addresses. Socket Options. Simple Socket Interface (SSI). Socket Implementation of SMI. Connectionless Sockets. Out-of-Band Data. Network Database Functions. Miscellaneous System Calls. High-Performance Considerations.



9. Signals and Timers.


Signal Basics. Waiting for a Signal. Miscellaneous Signal System Calls. Deprecated Signal System Calls. Realtime Signals Extension (RTS). Global Jumps. Clocks and Timers.



Appendix A. Process Attributes.


Appendix B. Ux: A C++ Wrapper for Standard UNIX Functions.


Appendix C. Jtux: A Java/Jython Interface to Standard UNIX Functions.


Appendix D. Alphabetical and Categorical Function Lists.


References.


Index.