LXR busybox/console-tools/setlogcons.c

   1/* vi: set sw=4 ts=4: */
   2/*
   3 * setlogcons: Send kernel messages to the current console or to console N
   4 *
   5 * Copyright (C) 2006 by Jan Kiszka <jan.kiszka@web.de>
   6 *
   7 * Based on setlogcons (kbd-1.12) by Andries E. Brouwer
   8 *
   9 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
  10 */
  11
  12//usage:#define setlogcons_trivial_usage
  13//usage:       "[N]"
  14//usage:#define setlogcons_full_usage "\n\n"
  15//usage:       "Redirect the kernel output to console N. Default:0 (current console)"
  16
  17#include "libbb.h"
  18
  19int setlogcons_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  20int setlogcons_main(int argc UNUSED_PARAM, char **argv)
  21{
  22        struct {
  23                char fn;
  24                char subarg;
  25        } arg = {
  26                11, /* redirect kernel messages */
  27                0   /* to specified console (current as default) */
  28        };
  29
  30        if (argv[1])
  31                arg.subarg = xatou_range(argv[1], 0, 63);
  32
  33        xioctl(xopen(VC_1, O_RDONLY), TIOCLINUX, &arg);
  34
  35        return EXIT_SUCCESS;
  36}
  37