fork.c

3司 机售票员同步模型 3司机售票员同步模型

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

int main (int argc, char *argv[])
{
    pid_t childpid;
    int i = 0;
    
    while (i < 3)
    {
        if ((childpid=vfork()) == -1)
        {
            perror("The fork failed\n");
            exit(-1);
        }
        else if(childpid == 0)/*child process*/
        {
            printf("This process is %ld, and it's parent is %ld\n"
                  ,(long)getpid(), (long)getppid());
        }
        else
        {
            exit(0);
        }
        i++;
    }
    return 0;
}