console.c

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/*
 * Functions for saving/restoring console.
 *
 * Originally from swsusp.
 */

#include <linux/vt_kern.h>
#include <linux/kbd_kern.h>
#include <linux/vt.h>
#include <linux/module.h>
#include "power.h"

#define SUSPEND_CONSOLE (MAX_NR_CONSOLES-1)

static int orig_fgconsole, orig_kmsg;

int pm_prepare_console(void)
{
    orig_fgconsole = vt_move_to_console(SUSPEND_CONSOLE, 1);
    if (orig_fgconsole < 0)
        return 1;

    orig_kmsg = vt_kmsg_redirect(SUSPEND_CONSOLE);
    return 0;
}

void pm_restore_console(void)
{
    if (orig_fgconsole >= 0) {
        vt_move_to_console(orig_fgconsole, 0);
        vt_kmsg_redirect(orig_kmsg);
    }
}