modules/all.c

   1 /* all.c -- console grabbing plugin for vlock,
   2  *          the VT locking program for linux
   3  *
   4  * This program is copyright (C) 2007 Frank Benkstein, and is free
   5  * software which is freely distributable under the terms of the
   6  * GNU General Public License version 2, included as the file COPYING in this
   7  * distribution.  It is NOT public domain software, and any
   8  * redistribution not permitted by the GNU General Public License is
   9  * expressly forbidden without prior written permission from
  10  * the author.
  11  *
  12  */
  13
  14 #include <stdio.h>
  15 #include <stdlib.h>
  16 #include <string.h>
  17 #include <unistd.h>
  18 #include <fcntl.h>
  19 #include <sys/ioctl.h>
  20 #include <errno.h>
  21 #include <signal.h>
  22
  23 #include "vlock_plugin.h"
  24 #include "console_switch.h"
  25
  26 bool vlock_start(void __attribute__((unused)) **ctx_ptr)
  27 {
  28   if (!lock_console_switch()) {
  29     if (!lock_console_switch()) {
  30       if (errno == ENOTTY || errno == EINVAL)
  31         fprintf(stderr, "vlock-all: this terminal is not a virtual console\n");
  32       else
  33         fprintf(stderr, "vlock-all: could not disable console switching: %s\n", strerror(errno));
  34     }
  35   }
  36
  37   return console_switch_locked;
  38 }
  39
  40 bool vlock_end(void __attribute__((unused)) **ctx_ptr)
  41 {
  42   return unlock_console_switch();
  43 }