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/* vi: set sw=4 ts=4: */
/*
* Mini fgconsole implementation for busybox
*
* Copyright (C) 2010 by Grigory Batalov <bga@altlinux.org>
*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
//config:config FGCONSOLE
//config: bool "fgconsole (1.5 kb)"
//config: default y
//config: help
//config: This program prints active (foreground) console number.
//applet:IF_FGCONSOLE(APPLET_NOEXEC(fgconsole, fgconsole, BB_DIR_USR_BIN, BB_SUID_DROP, fgconsole))
//kbuild:lib-$(CONFIG_FGCONSOLE) += fgconsole.o
//usage:#define fgconsole_trivial_usage
//usage: ""
//usage:#define fgconsole_full_usage "\n\n"
//usage: "Get active console"
#include "libbb.h"
/* From <linux/vt.h> */
struct vt_stat {
unsigned short v_active; /* active vt */
unsigned short v_signal; /* signal to send */
unsigned short v_state; /* vt bitmask */
};
enum { VT_GETSTATE = 0x5603 }; /* get global vt state info */
int fgconsole_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int fgconsole_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
{
struct vt_stat vtstat;
vtstat.v_active = 0;
xioctl(get_console_fd_or_die(), VT_GETSTATE, &vtstat);
printf("%d\n", vtstat.v_active);
return EXIT_SUCCESS;
}
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