What magic did openssh do to handle programs like VIM?

[Ziirish]

Hi,

I'm not familiar with openssh internals, but in order to "catch" the specials
characters, you may want to use ioctl(2) with the requests TCGETS and TCSETS.


* On Monday, 10 February 2014 09:45, Aaron Lewis <the.warl0ck.1989 at gmail.com> wrote:
> Hi,
> 
> I'm trying to write my own remote shell program,
> 
> It simply connects to a remote server then copy the sock fd to stdin,
> stdout and stderr. And it works.
> 
> But I found several problems:
> 1. It doesn't handle characters like ^A ^E or tab (any bash/readline stuff)
>     -> openssh itself doesn't seem to incorporate readline, so the
> magic is not on           readline
> 2. If I run command like VIM, it doesn't run.
>     And buttons like "<ESC>:q" won't work
> 
> Can someone enlighten me about what SSH did, so it all works perfectly?
> 
> Attached the prototype:
> 
>     int sockfd = socket(PF_INET, SOCK_STREAM, 0);
>     struct sockaddr_in remaddr = { 0 };
> 
>     remaddr.sin_family = AF_INET;
>     remaddr.sin_port = htons(9999);
>     remaddr.sin_addr.s_addr = inet_addr("192.168.56.1");
> 
>     if (connect(sockfd, (struct sockaddr *)&remaddr, sizeof(struct sockaddr)))
>         ERR_QUIT("connect");
> 
>     for (int i = 0; i < 2; ++i )
>         dup2 (sockfd, i);
>     execl("/bin/bash", "/bin/bash", "-i", NULL);
> 
> 
> 
> -- 
> Best Regards,
> Aaron Lewis - PGP: 0x13714D33 - http://pgp.mit.edu/
> Finger Print:   9F67 391B B770 8FF6 99DC  D92D 87F6 2602 1371 4D33
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