src/consoletype.c


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/*
 * consoletype.c
 * simple app to figure out whether the current terminal
 * is serial, console (vt), or remote (pty).
 *
 * Copyright 1999-2004 Gentoo Foundation
 * Distributed under the terms of the GNU General Public License v2
 * $Header$
 */

#include <stdio.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include "headers.h"

int main(int argc, char *argv[])
{
	int maj;
	struct stat sb;

	fstat(0, &sb);
	maj = major(sb.st_rdev);
	if (maj != 3 && (maj < 136 || maj > 143)) {
#if defined(__linux__)
		unsigned char twelve = 12;
		if (ioctl (0, TIOCLINUX, &twelve) < 0) {
			printf("serial\n");
			return 1;
		}
#endif
		printf("vt\n");
		return 0;
	} else {
		printf("pty\n");
		return 2;
	}
}