5cb907fffc
BTW, I failed to make it do what it meant to do. ioctl appears to succeed, but kernel's output is not coming to the specified console (tried on VT consoles too). OTOH, setlogcons does work... Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
60 lines
1.6 KiB
C
60 lines
1.6 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* setconsole.c - redirect system console output
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*
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* Copyright (C) 2004,2005 Enrik Berkhan <Enrik.Berkhan@inka.de>
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* Copyright (C) 2008 Bernhard Reutner-Fischer
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*
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* Licensed under GPLv2 or later, see file LICENSE in this source tree.
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*/
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//config:config SETCONSOLE
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//config: bool "setconsole (3.7 kb)"
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//config: default y
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//config: select PLATFORM_LINUX
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//config: help
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//config: This program redirects the system console to another device,
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//config: like the current tty while logged in via telnet.
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//config:
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//config:config FEATURE_SETCONSOLE_LONG_OPTIONS
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//config: bool "Enable long options"
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//config: default y
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//config: depends on SETCONSOLE && LONG_OPTS
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//applet:IF_SETCONSOLE(APPLET_NOEXEC(setconsole, setconsole, BB_DIR_SBIN, BB_SUID_DROP, setconsole))
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//kbuild:lib-$(CONFIG_SETCONSOLE) += setconsole.o
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//usage:#define setconsole_trivial_usage
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//usage: "[-r] [DEVICE]"
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//usage:#define setconsole_full_usage "\n\n"
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//usage: "Redirect system console output to DEVICE (default: /dev/tty)\n"
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//usage: "\n -r Reset output to /dev/console"
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/* It was a bbox-specific invention, but SUSE does have a similar utility.
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* SUSE has no -r option, though.
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*/
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#include "libbb.h"
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int setconsole_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int setconsole_main(int argc UNUSED_PARAM, char **argv)
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{
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const char *device = CURRENT_TTY;
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bool reset;
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/* at most one non-option argument */
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opt_complementary = "?1";
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reset = getopt32(argv, "r");
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argv += 1 + reset;
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if (*argv) {
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device = *argv;
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} else {
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if (reset)
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device = DEV_CONSOLE;
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}
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xioctl(xopen(device, O_WRONLY), TIOCCONS, NULL);
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return EXIT_SUCCESS;
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}
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