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/* 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 (3.7 kb)"
//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;
}
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