| /* vi: set sw=4 ts=4: */ |
| /* |
| * setconsole.c - redirect system console output |
| * |
| * Copyright (C) 2004,2005 Enrik Berkhan <Enrik.Berkhan@inka.de> |
| * Copyright (C) 2008 Bernhard Reutner-Fischer |
| * |
| * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
| */ |
| //config:config SETCONSOLE |
| //config: bool "setconsole" |
| //config: default y |
| //config: select PLATFORM_LINUX |
| //config: help |
| //config: This program redirects the system console to another device, |
| //config: like the current tty while logged in via telnet. |
| //config: |
| //config:config FEATURE_SETCONSOLE_LONG_OPTIONS |
| //config: bool "Enable long options" |
| //config: default y |
| //config: depends on SETCONSOLE && LONG_OPTS |
| |
| //applet:IF_SETCONSOLE(APPLET(setconsole, BB_DIR_SBIN, BB_SUID_DROP)) |
| |
| //kbuild:lib-$(CONFIG_SETCONSOLE) += setconsole.o |
| |
| //usage:#define setconsole_trivial_usage |
| //usage: "[-r" IF_FEATURE_SETCONSOLE_LONG_OPTIONS("|--reset") "] [DEVICE]" |
| //usage:#define setconsole_full_usage "\n\n" |
| //usage: "Redirect system console output to DEVICE (default: /dev/tty)\n" |
| //usage: "\n -r Reset output to /dev/console" |
| |
| #include "libbb.h" |
| |
| int setconsole_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| int setconsole_main(int argc UNUSED_PARAM, char **argv) |
| { |
| const char *device = CURRENT_TTY; |
| bool reset; |
| |
| #if ENABLE_FEATURE_SETCONSOLE_LONG_OPTIONS |
| static const char setconsole_longopts[] ALIGN1 = |
| "reset\0" No_argument "r" |
| ; |
| applet_long_options = setconsole_longopts; |
| #endif |
| /* at most one non-option argument */ |
| opt_complementary = "?1"; |
| reset = getopt32(argv, "r"); |
| |
| argv += 1 + reset; |
| if (*argv) { |
| device = *argv; |
| } else { |
| if (reset) |
| device = DEV_CONSOLE; |
| } |
| |
| xioctl(xopen(device, O_WRONLY), TIOCCONS, NULL); |
| return EXIT_SUCCESS; |
| } |