Bug#614127: confirmed on allmachines: painfull

[Julien Cristau <jcristau@debian.org>]

On Fri, Feb 25, 2011 at 20:20:47 +0200, Anton Zinoviev wrote:

> On Fri, Feb 25, 2011 at 06:44:22PM +0100, Julien Cristau wrote:
> >
> > Why "at best"?  It sounds like checking whether the active VT is in
> > KD_TEXT is exactly what's needed here.
> 
> How can this be tested?
> 
Something like this:

#include <stdio.h>
#include <err.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <linux/kd.h>

int main() {
	int fd;
	int rc;
	int mode;

	fd = open("/dev/tty0", O_RDONLY);
	if (fd < 0)
		err(1, "open(/dev/tty0)");
	rc = ioctl(fd, KDGETMODE, &mode);
	if (rc < 0)
		err(1, "ioctl(KDGETMODE)");
	switch (mode) {
		case KD_TEXT:
			printf("text\n");
			break;
		case KD_GRAPHICS:
			printf("graphics\n");
			break;
		default:
			printf("other (%d)\n", mode);
			break;
	}
	return 0;
}