Re: [kbd] New vt_mode tool for kbd?

[Alexey Gladkov <gladkov.alexey@gmail.com>]

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22.03.2011 00:42, Michael Schutte wrote:
> Hi Alexey,
> 
> The console-setup package in Debian needs a way to check for the
> text/graphics mode of the active VT (from a shell script).  This can be
> done with “setfont -v -o /dev/null”, for example, but that isn’t very
> elegant.  Julien Cristau has proposed a small utility (which I’m calling
> “vt_mode” for now) to report this information in a canonical fashion.

May be something like this (see attachment) ?

I thing this utility is more script-friendly and more extensible.

-- 
Rgrds, legion


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#include <stdio.h>
#include <errno.h>
#include <error.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <linux/kd.h>
#include <getopt.h>
#include "getfd.h"
#include "nls.h"
#include "version.h"

#define RETURN_BASE 100
#define GETMODE     10
#define GKBMODE     20
#define GKBMETA     30

static void attr_noreturn
usage(int code) {
	fprintf(stderr, _("Usage: kbdinfo [-C DEVICE] GETMODE | GKBMODE | GKBMETA\n"));
	exit(code);
}

int
main(int argc, char *argv[]) {
	int fd, mode, c, rc;
	int quiet = 0;
	char *console = NULL;

	set_progname(argv[0]);

	setlocale(LC_ALL, "");
	bindtextdomain(PACKAGE_NAME, LOCALEDIR);
	textdomain(PACKAGE_NAME);

	while ((c = getopt(argc, argv, "C:qhV")) != EOF) {
		switch (c) {
		case 'C':
			if (optarg == NULL || optarg[0] == '\0')
				usage(1);
			console = optarg;
			break;
		case 'q':
			quiet = 1;
			break;
		case 'V':
			print_version_and_exit();
			break;
		case 'h':
			usage(0);
			break;
		default:
			usage(1);
		}
	}

	if (argc == optind)
		usage(1);

	fd = getfd(console);

	rc = EXIT_FAILURE;

#define answer(typ,text,code) { \
	if (!quiet) \
		printf("%s\n", text); \
	rc = (RETURN_BASE + typ + code); \
};

	if (!strcasecmp("GETMODE", argv[optind])) {
		if (ioctl(fd, KDGETMODE, &mode) == -1)
			error(EXIT_FAILURE, errno, "ioctl");

		switch (mode) {
		case KD_TEXT:		answer(GETMODE, "text",     1);	break;
		case KD_GRAPHICS:	answer(GETMODE, "graphics", 2); break;
		}
		return rc;
	}

	if (!strcasecmp("GKBMODE", argv[optind])) {
		if (ioctl(fd, KDGKBMODE, &mode) == -1)
			error(EXIT_FAILURE, errno, "ioctl");

		switch (mode) {
		case K_RAW:		answer(GKBMODE, "raw",       1); break;
		case K_XLATE:		answer(GKBMODE, "xlate",     2); break;
		case K_MEDIUMRAW:	answer(GKBMODE, "mediumraw", 3); break;
		case K_UNICODE:		answer(GKBMODE, "unicode",   4); break;
		}
		return rc;
	}

	if (!strcasecmp("GKBMETA", argv[optind])) {
		if (ioctl(fd, KDGKBMETA, &mode) == -1)
			error(EXIT_FAILURE, errno, "ioctl");

		switch (mode) {
		case K_METABIT:		answer(GKBMETA, "metabit",   1); break;
		case K_ESCPREFIX:	answer(GKBMETA, "escprefix", 2); break;
		}
		return rc;
	}

	return rc;
}