使用busybox配置ftp server

使用busybox配置ftp server：

1.在编译busybox时加入tcpsvd和ftpd

2.tcpsvd作用：

Create TCP socket, bind to IP:PORT and listen                                   
for incoming connection. Run PROG for each connection.

3.ftpd作用：

ftpd should be used as an inetd service.                                        
ftpd's line for inetd.conf:                                                     
        21 stream tcp nowait root ftpd ftpd /files/to/serve                     
It also can be ran from tcpsvd:                                                 
        tcpsvd -vE 0.0.0.0 21 ftpd /files/to/serve                             

4.在终端上输入:

tcpsvd 0 21 ftpd -w /root

0代表监听所有ip，21代表本地监听端口为21，ftpd代表要执行的程序，-w代表允许上传，/root代表默认登录和允许访问的目录