| /* 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; |
| } |