if ((flags & FLAG_STDERR)) {
        int i;
        for (i = 0; i < len; i++)
            if (buf[i] != '\r')
                fputc(buf[i], stderr);
	return;
    }
    while (len--) 
        c_write1(*buf++);
}

    from_backend(1, buf, len);
static void c_writedata (char *buf, int len) {
    while (len--)
        c_write1(*buf++);
}

/*
 * Collect incoming data in the incoming packet buffer.
 * Decipher and verify the packet when it is completely read.
 * Drop SSH1_MSG_DEBUG and SSH1_MSG_IGNORE packets.
 * Update the *data and *datalen variables.

    begin_session();
    while (1) {
	crReturnV;
	if (ispkt) {
	    if (pktin.type == SSH1_SMSG_STDOUT_DATA ||
                pktin.type == SSH1_SMSG_STDERR_DATA) {
		long len = GET_32BIT(pktin.body);
		from_backend(pktin.type == SSH1_SMSG_STDERR_DATA,
		c_writedata(pktin.body+4, len);
			     pktin.body+4, len);
	    } else if (pktin.type == SSH1_MSG_DISCONNECT) {
                ssh_state = SSH_STATE_CLOSED;
		logevent("Received disconnect request");
            } else if (pktin.type == SSH1_SMSG_AGENT_OPEN) {
                /* Remote side is trying to open a channel to talk to our
                 * agent. Give them back a local channel number. */
                unsigned i = 1;

                if (ssh2_pkt_getuint32() != mainchan->localid)
                    continue;          /* wrong channel */
                if (pktin.type == SSH2_MSG_CHANNEL_EXTENDED_DATA &&
                    ssh2_pkt_getuint32() != SSH2_EXTENDED_DATA_STDERR)
                    continue;          /* extended but not stderr */
                ssh2_pkt_getstring(&data, &length);
                if (data) {
                    from_backend(pktin.type == SSH2_MSG_CHANNEL_EXTENDED_DATA,
                    c_writedata(data, length);
				 data, length);
                    /*
                     * Enlarge the window again at the remote side,
                     * just in case it ever runs down and they fail
                     * to send us any more data.
                     */
                    ssh2_pkt_init(SSH2_MSG_CHANNEL_WINDOW_ADJUST);
                    ssh2_pkt_adduint32(mainchan->remoteid);