c - How to intercept SSH stdin and stdout? (not the password) -

i realize question asked frequently, people want intercept password-asking phase of ssh. not want. i'm after post-login text.

i want write wrapper ssh, acts intermediary between ssh , terminal. want configuration:

(typing on keyboard / stdin) ----> (wrapper) ----> (ssh client)

and same output coming ssh:

(ssh client) -----> (wrapper) -----> stdout

i seem able attain effect want stdout doing standard trick found online (simplified code):

pipe(fd) if (!fork()) {   close(fd[read_side]);   close(stdout_fileno);  // close stdout ( fd #1 )   dup(fd[write_side]);   // duplicate writing side of pipe ( lowest # free pipe, 1 )   close(stderr_fileno);   dup(fd[write_side]);   execv(argv[1], argv + 1); // run ssh } else {   close(fd[write_side]);   output = fdopen(fd[read_side], "r");   while ( (c = fgetc(output)) != eof) {     printf("%c", c);     fflush(stdout);   } } 

like said, think works. however, can't seem opposite. can't close(stdin_fileno) , dup readside of pipe. seems ssh detects , prevents it. i've read can use "-t -t" option force ssh ignore non-stdin nature of input; when try still doesn't work.

any hints?

thanks much!

use popen (instead of execv) execute ssh cmd , able read , write session.