Root/kernel/power/console.c

1/*
2 * Functions for saving/restoring console.
3 *
4 * Originally from swsusp.
5 */
6
7#include <linux/vt_kern.h>
8#include <linux/kbd_kern.h>
9#include <linux/vt.h>
10#include <linux/module.h>
11#include "power.h"
12
13#define SUSPEND_CONSOLE (MAX_NR_CONSOLES-1)
14
15static int orig_fgconsole, orig_kmsg;
16
17int pm_prepare_console(void)
18{
19    orig_fgconsole = vt_move_to_console(SUSPEND_CONSOLE, 1);
20    if (orig_fgconsole < 0)
21        return 1;
22
23    orig_kmsg = vt_kmsg_redirect(SUSPEND_CONSOLE);
24    return 0;
25}
26
27void pm_restore_console(void)
28{
29    if (orig_fgconsole >= 0) {
30        vt_move_to_console(orig_fgconsole, 0);
31        vt_kmsg_redirect(orig_kmsg);
32    }
33}
34

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