release/src/router/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 (0 for current)"
  16
  17 #include "libbb.h"
  18
  19 int setlogcons_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  20 int setlogcons_main(int argc UNUSED_PARAM, char **argv)
  21 {
  22         struct {
  23                 char fn;
  24                 char subarg;
  25         } arg = { 11, /* redirect kernel messages */
  26                           0   /* to specified console (current as default) */
  27                         };
  28
  29         if (argv[1])
  30                 arg.subarg = xatou_range(argv[1], 0, 63);
  31
  32         xioctl(xopen(VC_1, O_RDONLY), TIOCLINUX, &arg);
  33
  34         return EXIT_SUCCESS;
  35 }