blob: 58057268d29eb5f2622ab9686e58afb346650730
| 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 | //config:config SETCONSOLE |
| 11 | //config: bool "setconsole" |
| 12 | //config: default y |
| 13 | //config: select PLATFORM_LINUX |
| 14 | //config: help |
| 15 | //config: This program redirects the system console to another device, |
| 16 | //config: like the current tty while logged in via telnet. |
| 17 | //config: |
| 18 | //config:config FEATURE_SETCONSOLE_LONG_OPTIONS |
| 19 | //config: bool "Enable long options" |
| 20 | //config: default y |
| 21 | //config: depends on SETCONSOLE && LONG_OPTS |
| 22 | //config: help |
| 23 | //config: Support long options for the setconsole applet. |
| 24 | |
| 25 | //applet:IF_SETCONSOLE(APPLET(setconsole, BB_DIR_SBIN, BB_SUID_DROP)) |
| 26 | |
| 27 | //kbuild:lib-$(CONFIG_SETCONSOLE) += setconsole.o |
| 28 | |
| 29 | //usage:#define setconsole_trivial_usage |
| 30 | //usage: "[-r" IF_FEATURE_SETCONSOLE_LONG_OPTIONS("|--reset") "] [DEVICE]" |
| 31 | //usage:#define setconsole_full_usage "\n\n" |
| 32 | //usage: "Redirect system console output to DEVICE (default: /dev/tty)\n" |
| 33 | //usage: "\n -r Reset output to /dev/console" |
| 34 | |
| 35 | #include "libbb.h" |
| 36 | |
| 37 | int setconsole_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| 38 | int setconsole_main(int argc UNUSED_PARAM, char **argv) |
| 39 | { |
| 40 | const char *device = CURRENT_TTY; |
| 41 | bool reset; |
| 42 | |
| 43 | #if ENABLE_FEATURE_SETCONSOLE_LONG_OPTIONS |
| 44 | static const char setconsole_longopts[] ALIGN1 = |
| 45 | "reset\0" No_argument "r" |
| 46 | ; |
| 47 | applet_long_options = setconsole_longopts; |
| 48 | #endif |
| 49 | /* at most one non-option argument */ |
| 50 | opt_complementary = "?1"; |
| 51 | reset = getopt32(argv, "r"); |
| 52 | |
| 53 | argv += 1 + reset; |
| 54 | if (*argv) { |
| 55 | device = *argv; |
| 56 | } else { |
| 57 | if (reset) |
| 58 | device = DEV_CONSOLE; |
| 59 | } |
| 60 | |
| 61 | xioctl(xopen(device, O_WRONLY), TIOCCONS, NULL); |
| 62 | return EXIT_SUCCESS; |
| 63 | } |
| 64 |