fork_wait.c

培训材料如何在linux下创建进程和信号发送

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

int main(int argc,char *argv[])
{
	int count=0;
	int stat;
	int i;
	char message[50];
	memset(message,0,50);
	pid_t child,child2;
	child=fork();
	char *command="ssssss";
	if(child==0)
	{
		count=3;
		printf("%s\n",command);
		strcpy(message,"this is child");
		sleep(5);
		printf("child over!\n");
		exit(5);
	}
	else if (child>0)
	{
		count=5;
		strcpy(message,"i'm father");
	}
	
	child2=fork();
	if(child2==0)
	{
		printf("other child run....\n");
		sleep(3);
		exit(4);
	}
	waitpid(child,&stat,WNOHANG);
	if(WIFEXITED(stat))
	{
		printf("child exit code=%d",WEXITSTATUS(stat));
	}
	//printf("%d,%d\n",child,wait(&stat));
	printf("child process over!\n");
	return 0;
}