Introduction
All processes have a processing environment (not to be confused with environment variables that are, as we will see, just one part of the processing environment). The processing environment consists of a unique set of information and conditions that is determined by the current state of the system and by the parent of the process. A process can access processing environment information and, in some cases, modify it. This is accomplished either directly or by using the appropriate system calls or library functions.
Programs and Processes
- Introduction
- Library Functions
- System Calls
- Linking Object Code
- Managing Failures
- Executable File Format
- System Memory
- Process Memory
- The u Area
- Process Memory Addresses
- Creating a Process
- Summary
- Key Terms and Concepts
Processing Environment
- Introduction
- Process ID
- Parent Process ID
- Process Group ID
- Permissions
- Real and Effective User and Group IDs
- File System Information
- File Information
- Process Resource Limits
- Signaling Processes
- Command-Line Values
- Environment Variables
- The /proc Filesystem
- Summary
- Key Terms and Concepts
Using Processes
- Introduction
- The fork System Call Revisited
- exec s Minions
- Using fork and exec Together
- Ending a Process
- Waiting on Processes
- Summary
- Key Terms and Concepts
Primitive Communications
- Introduction
- Lock Files
- Locking Files
- More About Signals
- Signal and Signal Management Calls
- Summary
- Key Terms and Concepts
Pipes
Message Queues
- Introduction
- IPC System Calls: A Synopsis
- Creating a Message Queue
- Message Queue Control
- Message Queue Operations
- A ClientServer Message Queue Example
- Message Queue Class
- Summary
- Key Terms and Concepts
Semaphores
- Introduction
- Creating and Accessing Semaphore Sets
- Semaphore Control
- Semaphore Operations
- Semaphore Class
- Summary
- Key Terms and Concepts
Shared Memory
- Introduction
- Creating a Shared Memory Segment
- Shared Memory Control
- Shared Memory Operations
- Using a File as Shared Memory
- Shared Memory Class
- Summary
- Key Terms and Concepts
Remote Procedure Calls
- Introduction
- Executing Remote Commands at a System Level
- Executing Remote Commands in a Program
- Transforming a Local Function Call into a Remote Procedure
- Debugging RPC Applications
- Using RPCGEN to Generate Templates and a MAKEFILE
- Encoding and Decoding Arbitrary Data Types
- Using Broadcasting to Search for an RPC Service
- Summary
- Key Terms and Concepts
Sockets
- Introduction
- Communication Basics
- IPC Using Socketpair
- Sockets: The Connection-Oriented Paradigm
- Sockets: The Connectionless Paradigm
- Multiplexing I/O with select
- Peeking at Data
- Out of Band Messages
- Summary
- Key Terms and Concepts
Threads
- Introduction
- Creating a Thread
- Exiting a Thread
- Basic Thread Management
- Thread Attributes
- Scheduling Threads
- Using Signals in Threads
- Thread Synchronization
- Thread-Specific Data
- Debugging Multithreaded Programs
- Summary
- Nomenclature and Key Concepts
Appendix A. Using Linux Manual Pages
Appendix B. UNIX Error Messages
Appendix C. RPC Syntax Diagrams
Appendix D. Profiling Programs
EAN: 2147483647
Pages: 136
