posix API Tutorial

【实例截图】

【核心代码】

Table of Contents
About 1 1
Chapter 1: Getting started with POSIX 2 2
Versions 2
Examples 2
What is POSIX? 2
Hello World 3
Compiling and running 3
Chapter 2: File locks 5 5
Syntax 5
Examples 5
POSIX record locks (fcntl) 5
lockf function 6
Chapter 3: Filesystem 8 8
Examples 8
Count number of text files in the directory 8
Remove files recursively (nftw, not thread-safe) 8
Remove files recursively (openat and unlinkat, thread-safe) 9
Chapter 4: Input/Output multiplexing 12
Introduction 12
Examples 12
Poll 12
Select 13
Chapter 5: Pipes 15
Introduction 15
Examples 15
Basic creation and usage 15
Establishing a pipe to a child process 16
Connecting two child processes via a pipe 17
Creating a shell-style pipeline 18
Chapter 6: Processes 20
Syntax 20
Parameters 20
Examples 20
Create child process and wait until it exits 20
Chapter 7: Signals 23
Syntax 23
Parameters 23
Examples 23
Raising SIGALARM with the default action 23
Setting signal handler using sigaction and raising signals using raise 24
A process committing suicide using kill() 26
Handle SIGPIPE generated by write() in a thread-safe manner 27
Chapter 8: Sockets 30
Examples 30
TCP Concurrent Echo Server 30
Enabling TCP keepalive at server side 32
TCP Daytime Iterative Server 34
TCP Daytime Client 35
Socket basics 35
Entire program 36
Creating IPv4 endpoint 37
TCP server snippet 37
TCP client snippet 38
UDP server snippet 38
Accepting connections on a blocking socket 39
Connecting to a remote host 40
Reading and writing on a blocking socket 40
Chapter 9: Threads 42
Examples 42
Simple Thread without Arguments 42
Simple Mutex Usage 43
Chapter 10: Timers 48
Examples 48
POSIX Timer with SIGEV_THREAD notification 48
Credits 50