release/src/router/busybox/console-tools/setconsole.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  *  setconsole.c - redirect system console output
   4  *
   5  *  Copyright (C) 2004,2005  Enrik Berkhan <Enrik.Berkhan@inka.de>
   6  *  Copyright (C) 2008 Bernhard Reutner-Fischer
   7  *
   8  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
   9  */
  10
  11 //usage:#define setconsole_trivial_usage
  12 //usage:       "[-r" IF_FEATURE_SETCONSOLE_LONG_OPTIONS("|--reset") "] [DEVICE]"
  13 //usage:#define setconsole_full_usage "\n\n"
  14 //usage:       "Redirect system console output to DEVICE (default: /dev/tty)\n"
  15 //usage:     "\n        -r      Reset output to /dev/console"
  16
  17 #include "libbb.h"
  18
  19 int setconsole_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  20 int setconsole_main(int argc UNUSED_PARAM, char **argv)
  21 {
  22         const char *device = CURRENT_TTY;
  23         bool reset;
  24
  25 #if ENABLE_FEATURE_SETCONSOLE_LONG_OPTIONS
  26         static const char setconsole_longopts[] ALIGN1 =
  27                 "reset\0" No_argument "r"
  28                 ;
  29         applet_long_options = setconsole_longopts;
  30 #endif
  31         /* at most one non-option argument */
  32         opt_complementary = "?1";
  33         reset = getopt32(argv, "r");
  34
  35         argv += 1 + reset;
  36         if (*argv) {
  37                 device = *argv;
  38         } else {
  39                 if (reset)
  40                         device = DEV_CONSOLE;
  41         }
  42
  43         xioctl(xopen(device, O_WRONLY), TIOCCONS, NULL);
  44         return EXIT_SUCCESS;
  45 }