sigtest1.c

关于IPC通信的小程序代码！

/////////////////////////////////////////////////////////////
//ModuleName:	semtest.c
//Author:	delaybbc
//WrittenTime:	2004/3/5
//Functions:	This module test use of signal and
//		timer in Linux/Unix IPC
//Reference:	
/////////////////////////////////////////////////////////////
////////////////////////////header///////////////////////////
#include <unistd.h>
#include "/home/delaybbc/inc/m_ipc.h"
#include "/home/delaybbc/inc/m_networks.h"
//////////////////////constant defination////////////////////


////////////////////////global variant///////////////////////
char msg[20];

////////////////////////////body/////////////////////////////
void handle_ctrl_c(int signo)
{
	printf("ctrl+c\n");
	exit(0);
}

void handle_alarm(int signo)
{
	printf(msg);
	alarm(2);
}


main()
{	
	struct sigaction act;
	pid_t child_id;	

	act.sa_handler=handle_ctrl_c;
	sigemptyset(&act.sa_mask);
	sigaddset(&act.sa_mask,SIGTERM);
	sigaction(SIGINT,&act,NULL);

	act.sa_handler=handle_alarm;
	sigemptyset(&act.sa_mask);
	sigaddset(&act.sa_mask,SIGALRM);
	sigaction(SIGALRM,&act,NULL);
	if((child_id=fork())==0)
	{
		sprintf(msg,"I`m child process\n");
		sleep(1);
		alarm(2);
		while(1);
	}
	else
	{	
		sprintf(msg,"I`m father process\n");
		alarm(2);
		while(1);
	}
}