LXR 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
  19int setconsole_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  20int 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}
  46