void
packet_write_poll(void)
{
int r;
if ((r = ssh_packet_write_poll(active_state)) != 0)
sshpkt_fatal(active_state, __func__, r);
}
int
packet_write_poll(void)
{
int r;
if ((r = ssh_packet_write_poll(active_state)) < 0)
sshpkt_fatal(active_state, __func__, r);
return r;
}
/*
* Sends data from internal buffers to client program stdin.
*/
static void
process_output(struct ssh *ssh, fd_set *writeset)
{
struct termios tio;
const u_char *data;
u_int dlen;
int r, len;
/* Write buffered data to program stdin. */
if (!compat20 && fdin != -1 && FD_ISSET(fdin, writeset)) {
data = sshbuf_ptr(stdin_buffer);
dlen = sshbuf_len(stdin_buffer);
len = write(fdin, data, dlen);
if (len < 0 && (errno == EINTR || errno == EAGAIN)) {
/* do nothing */
} else if (len <= 0) {
if (fdin != fdout)
close(fdin);
else
shutdown(fdin, SHUT_WR); /* We will no longer send. */
fdin = -1;
} else {
/* Successful write. */
if (fdin_is_tty && dlen >= 1 && data[0] != '\r' &&
tcgetattr(fdin, &tio) == 0 &&
!(tio.c_lflag & ECHO) && (tio.c_lflag & ICANON)) {
/*
* Simulate echo to reduce the impact of
* traffic analysis
*/
ssh_packet_send_ignore(ssh, len);
if ((r = sshpkt_send(ssh)) != 0)
fatal("%s: %s", __func__, ssh_err(r));
}
/* Consume the data from the buffer. */
if ((r = sshbuf_consume(stdin_buffer, len)) != 0)
fatal("%s: buffer error: %s", __func__,
ssh_err(r));
/* Update the count of bytes written to the program. */
stdin_bytes += len;
}
}
/* Send any buffered packet data to the client. */
if (FD_ISSET(connection_out, writeset))
ssh_packet_write_poll(ssh);
}
