/* This file is part of limb                           https://lila.oss/limb
 * Copyright (C) 2023 Olivier Brunel                          jjk@jjacky.com */
/* SPDX-License-Identifier: GPL-2.0-only */
#include <errno.h>
#include <termios.h>
#include <limb/term.h>

int
term_echo(int fd, int want)
{
    struct termios tio;
    int r;

    r = tcgetattr(fd, &tio);
    if (r < 0) return -1;

    if (want == !!(tio.c_lflag & ECHO))
        return 0;

    if (want)
        tio.c_lflag |= ECHO;
    else
        tio.c_lflag &= ~ECHO;

    if (tcsetattr(fd, TCSAFLUSH, &tio) < 0)
        return -1;

    return 1;
}