mes/lib/m2/isatty.c

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/* -*-comment-start: "//";comment-end:""-*-
* GNU Mes --- Maxwell Equations of Software
* Copyright © 2016,2017,2018,2019,2020 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
*
* This file is part of GNU Mes.
*
* GNU Mes is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or (at
* your option) any later version.
*
* GNU Mes is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Mes. If not, see <http://www.gnu.org/licenses/>.
*/
#include <mes/lib.h>
#include <sys/ioctl.h>
#include <stdlib.h>
#include <string.h>
#include <termio.h>
// CONSTANT TCGETS 0x5401
#define TCGETS 0x5401
struct ktermios
{
unsigned c_iflag;
unsigned c_oflag;
unsigned c_cflag;
unsigned c_lflag;
char c_line;
char c_cc[19];
unsigned c_ispeed;
unsigned c_ospeed;
};
struct ktermios *__isatty_kernel_termios;
int
isatty (int filedes)
{
if (__isatty_kernel_termios == 0)
__isatty_kernel_termios = malloc (sizeof (struct ktermios));
int r = ioctl (filedes, TCGETS, __isatty_kernel_termios);
return r == 0;
}