/*

 * fgconsole.c - aeb - 960123 - Print foreground console

 */

#include "config.h"

#include <stdio.h>

#include <stdlib.h>

#include <errno.h>

#include <sys/ioctl.h>

#include <getopt.h>

#include <linux/vt.h>

#include <linux/serial.h>

#include "getfd.h"

#include "nls.h"

#include "version.h"

#include "kbd_error.h"

static void __attribute__((noreturn))

usage(void)

{

	fprintf(stderr, _("%s version %s\n"

	                  "\n"

	                  "Usage: %s [options]\n"

	                  "\n"

	                  "Valid options are:\n"

	                  "\n"

	                  "	-h --help            display this help text\n"

	                  "	-V --version         display program version\n"

	                  "	-n --next-available  display number of next unallocated VT\n"),

	        progname, PACKAGE_VERSION, progname);

	exit(EXIT_FAILURE);

}

int main(int argc, char **argv)

{

	struct vt_stat vtstat;

	int fd, vtno = -1, c, show_vt = 0;

	struct serial_struct sr;

	const struct option long_opts[] = {

		{ "help", no_argument, NULL, 'h' },

		{ "version", no_argument, NULL, 'V' },

		{ "next-available", no_argument, NULL, 'n' },

		{ NULL, 0, NULL, 0 }

	};

	setlocale(LC_ALL, "");

	bindtextdomain(PACKAGE_NAME, LOCALEDIR);

	textdomain(PACKAGE_NAME);

	set_progname(argv[0]);

	while ((c = getopt_long(argc, argv, "Vhn", long_opts, NULL)) != EOF) {

		switch (c) {

			case 'h':

				usage();

				exit(0);

			case 'n':

				show_vt = 1;

				break;

			case 'V':

				print_version_and_exit();

				break;

			case '?':

				usage();

				exit(1);

		}

	}

	if ((fd = getfd(NULL)) < 0)

		kbd_error(EXIT_FAILURE, 0, _("Couldn't get a file descriptor referring to the console"));

	if (show_vt) {

		if ((ioctl(fd, VT_OPENQRY, &vtno) < 0) || vtno == -1) {

			kbd_error(2, errno, _("Couldn't read VTNO: "));

		}

		printf("%d\n", vtno);

		return EXIT_SUCCESS;

	}

	if (ioctl(fd, TIOCGSERIAL, &sr) == 0) {

		printf("serial\n");

		return EXIT_SUCCESS;

	}

	if (ioctl(fd, VT_GETSTATE, &vtstat)) {

		kbd_error(EXIT_FAILURE, errno, "fgconsole: VT_GETSTATE");

	}

	printf("%d\n", vtstat.v_active);

	return EXIT_SUCCESS;

}