操作系统课程设计说明书

小型FTP服务系统的设计。，FTP服务器程序，其加强的文件传输系统能够完全满足今天的用户的应用需求。本行上传和文件的相关服务FTP客户端给普通用户提供了一个与服务端进行通信的包含用户登录，用户注销，权限的管理以及文件的管理和文件传输的管理。，FTP客户端给普通用户提供了一个与服务端进行通信的操作界面，普通用户可以在权限的管理以及文件的管理和文件传输的管理。openputgetdele3．详细设函数get_user()和get_pass()得到用户输入的用户名和。ftp_login()函数用输入字符与缺省用户名、用户相比较，如果一致则登陆成功，否则失败。voidget_user()//{charprintf("User(Pressforanonymous):");fgets(read_buf,sizeof(read_buf),stdin);strncpy(user,"anonymous",9);strncpy(user,read_buf,strlen(read_buf)-}voidget_pass()//得到输入{charprintf("Password(Pressforanonymous):echo_off();//隐藏fgets(read_buf,sizeof(read_buf),stdin);strncpy(passwd,"anonymous",9);strncpy(passwd,read_buf,strlen(read_buf)-1);}intftp_login()//{int}}if(ftp_send_cmd("USER",user,sock_control)<0)cmd_err_exit("Cannotsendmessage",1);;errftp_get_reply(sock_control);//得到服务器返回if(err==331){if(ftp_send_cmd("PASS",passwd,sock_control)<=0)cmd_err_exit("Cannotsendmessage",1);errftp_get_reply(sock_control);if(err==230)//缺省用户{return}elseif(err==531)//用{return}{printf("Passworderror!\n");return0;}}{printf("Usererror!\n");return0;}intxconnect(structsockaddr_in*s_addrinttype)连接到服务器。intxconnect(structsockaddr_in*s_addr,inttype){structtimevalouttime;intset;ints=socket(AF_INET,SOCK_STREAM,0);if(s<0)cmd_err_exit("creatsocketerror!",set=setsockopt(s,SOL_SOCKET,SO_RCVTIMEO,&outtime,sizeof(outtime));if(set!=0){printf("setsocket%serrno:%d\n",strerror(errno),errno);cmd_err_exit("setsocket",1);}//connecttotheif(connect(s,(structsockaddr*)s_addr,sizeof(structsockaddr_in))<{printf("Can'tconnecttoserver%s,port%d\n",\}return}fgets(read_buf,sizeof(read_buf),stdin);ints=socket(AF_INET,SOCK_STREAM,0);if(s<0)cmd_err_exit("creatsocketerror!",创建套接字，如创建成功，socket函数返回非负值}}//connecttotheif(connect(s,(structsockaddr*)s_addr,sizeof(structsockaddr_in))<{printf("Can'tconnecttoserver%s,port%d\n",\}连接到服务器，如果连接成功，connect0，如果不成功，返回-1。intftp_send_cmd(constchar*s1,constchar*s2,intsock_fd)向服务器发送客户端令的函数intftp_send_cmd(constchar*s1,constchar*s2,int{charsend_buf[256];intsend_err,len;{{strcat(send_buf,s2);len=strlen(send_buf);send_err=send(sock_fd,send_buf,len,}{len=strlen(send_buf);send_err=send(sock_fd,send_buf,len,}if(send_err<0)printf("send()error!\n");return}//gettheserver'sreplymessagefromsock_fdintftp_get_reply(intsock_fd){staticintreply_code=0,count=0;charrcv_buf[512];count=read(sock_fd,rcv_buf,510);if(count>reply_code=atoi(rcv_buf);return0;{if(count<=0)count=read(sock_fd,rcv_buf,510);}return}send_err=send(sock_fd,send_buf,len,0);send00intxconnect_ftpdata()get_sock=socket(AF_INET,SOCK_STREAM,set=setsockopt(get_sock,SOL_SOCKET,SO_RCVTIMEO,set=setsockopt(get_sock,SOL_SOCKET,SO_REUSEADDR,set=bind(get_sock,(structsockaddr*)&local_host,if(set!=0&&errno==11){_port=rand_local_port();}set=listen(get_sock,bind、listenvoidopen_ftpsrv(){charusr_cmd[1024];intcmd_flag;{if(usr_cmd[0]=='\n')usr_cmd[strlen(usr_cmd)-1]='\0';cmd_flag=ftp_usr_cmd(usr_cmd);if(cmd_flag==15){char*cmd=strchr(usr_cmd,'');chardress_ftp[1024];if(cmd=={printf("commanderror!\n");}{while(*cmd=='')}if(cmd==NULL||cmd=={printf("commanderror!\n");}{char*dr="";dress_ftp[strlen(cmd)]='\0';if(dress_ftp==""){printf("ConnectSeccessed!\n");/