客户端设计：永久服务器管道（客户端只向此通道写入）>读写双通道（使用唯一的进程ID创建两通道）>向服务器管道写入唯一进程ID >open打开双通道转化为进程描述符>fork()创建父子进程>父进程负责写信息（用于杀死子进程kill()，unlink()删除通道文件，使用signal(),回收子进程，exit()自杀）

//File Name: myclient.c
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                         void handler(int num) { wait(NULL); exit(-1); } int main(int argc,char *argv[]) { if(argc!=2) { printf("Not Input PipeName!\n"); exit(-1); } int fd_sever;//服务器管道标识符 int fd_read,fd_write;//读写管道标识符 char buf[1024]; char fifo_write[128]=""; char fifo_read[128]=""; int pid; fd_sever=open(argv[1],O_WRONLY);//向服务器管道写入信息 sprintf(fifo_read,"%d_read.fifo",getpid()); sprintf(fifo_write,"%d_write.fifo",getpid()); mkfifo(fifo_read,0666); mkfifo(fifo_write,0666); FILE *fp=fdopen(fd_sever,"w"); if(fp==NULL) { perror("sever link failed!\n"); exit(-1); } fprintf(fp,"%d",getpid());//提示服务器上线，并通过进程号告诉服务器自己的读写管道 fflush(fp); fd_read=open(fifo_read,O_RDONLY); fd_write=open(fifo_write,O_WRONLY);//文件 printf("%d begin talk!",getpid()); if((pid=fork())>0)//父进程负责写 { close(fd_read); signal(17,handler); //格式化输入 FILE *fdw=fdopen(fd_write,"w"); if(fdw==NULL) { printf("the fd_write is failed\n"); exit(-1); } while(memset(buf,0,1024),fgets(buf,1024,stdin)!=NULL) { fprintf(fdw,"from %d :%s",getpid(),buf); fflush(fdw); } fprintf(fdw,"%s","bye"); fflush(fdw); printf("kill child!\n"); close(fd_write); kill(pid,9); unlink(fifo_read); unlink(fifo_write); while(1); } else { close(fd_write); while(memset(buf,0,1024),read(fd_read,buf,1024)>0) { fflush(stdout); write(1,buf,strlen(buf)); fflush(stdout); } close(fd_read); } return 0; }