bird/client/birdcl.c

/*
 *	BIRD Client - Light variant I/O
 *
 *	(c) 1999--2004 Martin Mares <mj@ucw.cz>
 *      (c) 2013 Tomas Hlavacek <tomas.hlavacek@nic.cz>
 *
 *	Can be freely distributed and used under the terms of the GNU GPL.
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <termios.h>
#include <errno.h>

#include <sys/ioctl.h>
#include <signal.h>

#include "nest/bird.h"
#include "lib/resource.h"
#include "lib/string.h"
#include "client/client.h"
#include "sysdep/unix/unix.h"

struct termios tty_save;

void
input_start_list(void)
{
  /* Empty in non-ncurses version. */
}

void
input_stop_list(void)
{
  /* Empty in non-ncurses version. */
}

void
input_notify(int prompt)
{
  /* No ncurses -> no status to reveal/hide, print prompt manually. */
  if (!prompt || !interactive)
    return;

  printf("\rbird> ");
  fflush(stdout);
}

void
input_read(void)
{
  simple_input_read();
}

static struct termios stored_tty;
static int more_active = 0;

void
more_begin(void)
{
  static struct termios tty;

  tty = stored_tty;
  tty.c_lflag &= (~ECHO);
  tty.c_lflag &= (~ICANON);

  if (tcsetattr (0, TCSANOW, &tty) < 0)
    DIE("tcsetattr");

  more_active = 1;
}

void
more_end(void)
{
  more_active = 0;

  if (tcsetattr (0, TCSANOW, &stored_tty) < 0)
    DIE("tcsetattr");
}

static void
sig_handler(int signal UNUSED)
{
  cleanup();
  exit(0);
}

void
input_init(void)
{
  if (!interactive)
    return;

  if (tcgetattr(0, &stored_tty) < 0)
    DIE("tcgetattr");

  if (signal(SIGINT, sig_handler) == SIG_IGN)
    signal(SIGINT, SIG_IGN);
  if (signal(SIGTERM, sig_handler) == SIG_IGN)
    signal(SIGTERM, SIG_IGN);

  struct winsize tws;
  if (ioctl(0, TIOCGWINSZ, &tws) == 0)
    {
      term_lns = tws.ws_row;
      term_cls = tws.ws_col;
    }
}

void
cleanup(void)
{
  if (more_active)
    more_end();
}