libssh2: как запустить удаленно бинарник и получить его вывод

int execcmd(const char *commandline, int sock, LIBSSH2_SESSION *session){
    int rc;
    int bytecount = 0;
    int exitcode;
    char *exitsignal=(char *)"none";
    LIBSSH2_CHANNEL *channel = NULL;
    while((channel = libssh2_channel_open_session(session)) == NULL && libssh2_session_last_error(session,NULL,NULL,0) == LIBSSH2_ERROR_EAGAIN){
        waitsocket(sock, session);
    }
    if(channel == NULL){
        fprintf(stderr,"Error\n");
        exit( 1 );
    }
    while( (rc = libssh2_channel_exec(channel, commandline)) == LIBSSH2_ERROR_EAGAIN){
        waitsocket(sock, session);
    }
    if(rc != 0){
        fprintf(stderr,"Error: %i\n", rc);
        exit( 1 );
    }
    for( ;; ){
        /* loop until we block */
        int rc;
        do{
            char buffer[0x4000];
            memset(buffer, 0, sizeof(buffer));
 
 
            rc = libssh2_channel_read( channel, buffer, sizeof(buffer) );
            if (rc > 0){
                int i;
                bytecount += rc;
                fprintf(stderr, "We read:\n");
                for(i=0; i < rc; ++i) fputc( buffer[i], stderr);
                fprintf(stderr, "\n");
            }
            else{
                if (rc != LIBSSH2_ERROR_EAGAIN){
                    // no need to output this for the EAGAIN case
                    fprintf(stderr, "SSH read returned %d\n", rc);
                }
            }
        }
        while( rc > 0 );
 
        // this is due to blocking that would occur otherwise so we loop on this condition
        if (rc == LIBSSH2_ERROR_EAGAIN) waitsocket(sock, session);
        else
            break;
    }
 
    exitcode = 127;
 
    while((rc = libssh2_channel_close(channel)) == LIBSSH2_ERROR_EAGAIN) waitsocket(sock, session);
    if(rc == 0){
        exitcode = libssh2_channel_get_exit_status(channel);
        libssh2_channel_get_exit_signal(channel, &exitsignal, NULL, NULL, NULL, NULL, NULL);
    }
 
    if (exitsignal) printf("\nGot signal: %s\n", exitsignal);
    else            printf("\nEXIT: %d bytecount: %d\n", exitcode, bytecount);
 
    libssh2_channel_free(channel);
    channel = NULL;
 
    return bytecount;
}

        if(access(myapp_cpp, 0) != -1)
    {
        answer_bytes = execcmd("killall myapp_cpp.elf", sock, session);
        if(send_file(myapp_cpp, "/home/user/myapp_cpp.elf", sock, session) < 0){
            fprintf(stderr, "ERROR: sending file error! Press any key...\n", rc);
            getch();
            goto shutdown;
        }
        answer_bytes = execcmd("chmod 777 /home/user/myapp_cpp.elf", sock, session);
        answer_bytes = execcmd("cd /home/user/; ls -l;", sock, session);
        answer_bytes = execcmd("echo './home/user/myapp_cpp.elf' | at now", sock, session);
//answer_bytes = execcmd("./home/user/myapp_cpp.elf", sock, session);  -- пробовал еще так
    }