Simple non-interactive shell

[Aloys Delobel <aloysdelobel@xxxxxxxxxxxxxx>]

Hi everybody,
I'm trying to set a simple non-interactive shell, between my program (which sends commands to the remote shell) and the server. Here's my program :

int pass_instruction(ssh_channel channel, int commandcode, std::string filename){
    std::string command;
    if (commandcode == MV_FILE){
        command = "cp repository/" + filename + " onthego/" ;

        rc = ssh_channel_write(channel, command.c_str(), sizeof(command));
        if (rc != sizeof(command)){
            std::cout << rc;
            return rc;
        }
    }
    return SSH_OK;
}

int main () {
    int rc(0);
    ssh_session session;
    ssh_channel channel;
    // skip the setting of session

    channel = ssh_channel_new(session);
    if (channel == NULL) return SSH_ERROR;

    rc = ssh_channel_open_session(channel);
    if (rc != SSH_OK){
        ssh_channel_free(channel);
        return rc;
    }

    rc = ssh_channel_request_shell(channel);
    if (rc != SSH_OK){
        ssh_channel_free(channel);
        return rc;
    }

    rc = pass_instruction(channel, MV_FILE, "example.txt");
    if (rc != SSH_OK) {
        return -1;
    }

   rc = pass_instruction(channel, MV_FILE, "example2.txt") ;
   if (rc != SSH_OK) {
        return -1;
    }
    // Delete / close / ... channel then session
    return 0;
}

And the problem is : the line "pass_instruction(channel, MV_FILE, "example.txt");" works and copy the file, then the "pass_instruction(channel, MV_FILE, "example2.txt") ;" works according to the program, but the file is not copied. I don't understand why...

Thanks for helping !
Aloys D.