process_group.c

linux下守护进程的实现源代码对于学习守护进程有很大帮助

#include  <unistd.h>
#include <sys/types.h>


int main(int argc,char *argv[])
{
	pid_t child;
	printf("process group id %d\n",getpgrp());
	printf("process id %d\n",getpid());
	child=fork();
	if(child==0)
	{
		printf("child process group id %d\n",getpgrp());
	}
	else if(child>0)
	{
		while(1)
		{
			sleep(1);
		}
	}
	return 0;
}