src/console_switch.h

   1 /* console_switch.c -- header file for the console grabbing
   2  *                     routines for vlock, the VT locking program
   3  *                     for linux
   4  *
   5  * This program is copyright (C) 2007 Frank Benkstein, and is free
   6  * software which is freely distributable under the terms of the
   7  * GNU General Public License version 2, included as the file COPYING in this
   8  * distribution.  It is NOT public domain software, and any
   9  * redistribution not permitted by the GNU General Public License is
  10  * expressly forbidden without prior written permission from
  11  * the author.
  12  *
  13  */
  14
  15 #include <stdbool.h>
  16
  17 /* Is console switching currently disabled? */
  18 extern bool console_switch_locked;
  19
  20 /* Disable virtual console switching in the kernel.  On failure false
  21  * is returned and errno is set. */
  22 bool lock_console_switch(void);
  23 /* Reenable console switching if it was previously disabled.  On failure false
  24  * is returned and errno is set. */
  25 bool unlock_console_switch(void);