sigextrainfo.c

关于进程间通信的代码集锦

#include <signal.h>
#include <sys/types.h>
#include <unistd.h>
void new_op(int,siginfo_t*,void *);
int main(int argc,char** argv)
{
	struct sigaction act;
	union sigval mysigval;
	int i;
	int sig;
	pid_t pid;
	char data[10];
	memset(data,0,sizeof(data));
	for(i=0;i<5;i++)
	{
		data[i]='A';
	}
	data[2]='B';
	mysigval.sival_ptr=data;
	
	sig=atoi(argv[1]);	
	pid=getpid();

	sigemptyset(&act.sa_mask);
	act.sa_flags=SA_SIGINFO;
	act.sa_sigaction=new_op;

	if(sigaction(sig,&act,NULL)<0)
	{
		printf("install sigal error\n");
	}
	while(1)
	{
		sleep(2);
		printf("wait for the signal\n");
		sigqueue(pid,sig,mysigval);
	}

	return 0;
}
void new_op(int signum,siginfo_t* info,void* myact)
{
	int i;
	for(i=0;i<10;i++)
	{
		printf("%c\n",*((char*)((*info).si_ptr+i)));
	}
	printf("handle signal %d over",signum);
}