Pseudoterminal Problems

Hi,
 
I want to programmatically control the SSH or telnet to login from a running process. I tried using redirection through pipes but ssh returned an error saying something like stdin is not a terminal. Now, my search has finally led to me a solution: through the use of pseudoterminals. So I made a test program (listed below). 
 
Supposedly I can write to stdin by writing to the file desc of the master pty. But it seems the co-process (ssh) is not reading what I wrote  from the slave pty. I don't know what's wrong?
 
Here is the test program:
#include <pty.h>
#include <stdio.h>
#include <termios.h>
#include <unistd.h>
#include <sys/types.h>

main()
{
   int fds;
   char sSlave[80];
   int n;
   char buffer[256];
   pid_t pid;
   
   if (pid = forkpty(&fds,sSlave, NULL, NULL ) == 0)
   {
execl("/usr/bin/ssh","ssh", "root@localhost", NULL);
     return 2;
   }

    // Simulate a user typing his username and password 
    // to the terminal
 
   write(fds, "username", strlen("username"));
   write(fds, "password", strlen("password")); 
   
}
 
Thanks.




Mara Sy



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