system call

HEY ALL!!!!

I still didn't figure out how i can open a ssh tunnel using a system call within my c code...

can anyone give me a hint in this issue?!?

Thanks a lot in advance
Breno Kastrup

man ssh

Code:

---

NAME
    ssh - OpenSSH SSH client (remote login program)

SYNOPSIS
    ssh [-1246AaCfgkMNnqsTtVvXxY] [-b bind_address] [-c cipher_spec] [-D port] [-e escape_char]
        [-F configfile] [-i identity_file] [-L  [bind_address:]port:host:hostport] [-l login_name]
        [-m mac_spec] [-O ctl_cmd] [-o option] [-p port] [-R  [bind_address:]port:host:hostport]
        [-S ctl_path] [user@]hostname [command]

DESCRIPTION
    ssh (SSH client) is a program for logging into a remote machine and for executing commands on a
    remote machine.  It is intended to replace rlogin and rsh, and provide secure encrypted communica-
    tions between two untrusted hosts over an insecure network.  X11 connections and arbitrary TCP/IP
    ports can also be forwarded over the secure channel.

    ssh connects and logs into the specified hostname (with optional user name).  The user must prove
    his/her identity to the remote machine using one of several methods depending on the protocol ver-
    sion used.

---

salem,

thanks for the try, but this still didn't help much..

Code:

---

#include <stdlib.h>
...
system ("ssh [see above man page]");

---

Is this what you wanted? system() sends a command to the shell.

Or with slightly more work you could implement it without the hated system() function.
Check out libssh

Hi all

Never use system() since you have a fork()-exec() choice in UNIX world!

Cool eerok, that's what i meant in the first place.....

but fnoyan said not to use system..... why is that??

so i should use the libssh valis pointed out instead?!

I'll take a look at it and tell you guys how i'm going...

Thanks a lot
Breno

Hi

Reading the below PDF will help you I think...

http://www.advancedlinuxprogramming....-processes.pdf