#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>

int
main(int argc,char *argv[])
{
int i,fd;
char buf[1024];
pid_t pid;
for(i=1;i<argc;i++)
{
        if((pid = fork())<0)
                printf("fork error:no=%d\n",i);
        else if(pid == 0)
        {//子进程
                chdir("data");
                fd = open(argv[i],O_CREAT|O_TRUNC|O_WRONLY,S_IRWXU|S_IRWXG|S_IRWXO);
                sprintf(buf,"pid:%d\n",getpid());
                write(fd,buf,strlen(buf));
                break;
        }
}
printf("the number %d process overd\n",i);
waitpid(pid,NULL);
exit(0);
}