摘要：1. interrupt flowHardware->Interrupt Controller->Processor2.Interrupt Handlera. DefinitionThe function that the kernel runs, in response to a specific interrupt.b.Difference between other kernel function.Kernel invoke them.the run in a special context.c.Interrupt handle's jobAcknowledge th 阅读全文

摘要：for code copy in the futuresimple server and clientmay be useful for copy in the futureserver:[cpp] view plaincopy#include<errno.h>#include"sys/types.h"#include"sys/socket.h"#include"sys/stat.h"#include"unistd.h"#include<netinet/in.h>//#include< 阅读全文

摘要：1. definitionlong ptrace(int request, pid_t pid, void * addr, void * data)request , trace type;the request determine the meaning of the other parameters and return value.2.possibility of request[cpp] view plaincopy#definePTRACE_TRACEME0#definePTRACE_PEEKTEXT1#definePTRACE_PEEKDATA2#definePTRACE_PEEK 阅读全文

摘要：socket API原本是为网络通讯设计的，但后来在socket的框架上发展出一种IPC机制，就是UNIX Domain Socket。虽然网络socket也可用于同一台主机的进程间通讯（通过loopback地址127.0.0.1），但是UNIX Domain Socket用于IPC更有效率：不需要经过网络协议栈，不需要打包拆包、计算校验和、维护序号和应答等，只是将应用层数据从一个进程拷贝到另一个进程。 这是因为，IPC机制本质上是可靠的通讯，而网络协议是为不可靠的通讯设计的。UNIX Domain Socket也提供面向流和面向数据包两种API接口，类似于TCP和UDP，但是面向消息的UNI 阅读全文

摘要：exec is used for start another program in the c code of linux1.execl[cpp] view plaincopyintexecl(constchar*path,constchar*arg,...)the last parameter must end up with NULL.[cpp] view plaincopy#include<stdio.h>#include<unistd.h>intmain(){execl("/home/cascais/code/hello","hel 阅读全文