blob: 019761726dfaa43a193dd6707aaf6d11f8a55536
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * Mini fgconsole implementation for busybox |
4 | * |
5 | * Copyright (C) 2010 by Grigory Batalov <bga@altlinux.org> |
6 | * |
7 | * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
8 | */ |
9 | //config:config FGCONSOLE |
10 | //config: bool "fgconsole" |
11 | //config: default y |
12 | //config: select PLATFORM_LINUX |
13 | //config: help |
14 | //config: This program prints active (foreground) console number. |
15 | |
16 | //applet:IF_FGCONSOLE(APPLET(fgconsole, BB_DIR_USR_BIN, BB_SUID_DROP)) |
17 | |
18 | //kbuild:lib-$(CONFIG_FGCONSOLE) += fgconsole.o |
19 | |
20 | //usage:#define fgconsole_trivial_usage |
21 | //usage: "" |
22 | //usage:#define fgconsole_full_usage "\n\n" |
23 | //usage: "Get active console" |
24 | |
25 | #include "libbb.h" |
26 | |
27 | /* From <linux/vt.h> */ |
28 | struct vt_stat { |
29 | unsigned short v_active; /* active vt */ |
30 | unsigned short v_signal; /* signal to send */ |
31 | unsigned short v_state; /* vt bitmask */ |
32 | }; |
33 | enum { VT_GETSTATE = 0x5603 }; /* get global vt state info */ |
34 | |
35 | int fgconsole_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
36 | int fgconsole_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM) |
37 | { |
38 | struct vt_stat vtstat; |
39 | |
40 | vtstat.v_active = 0; |
41 | xioctl(get_console_fd_or_die(), VT_GETSTATE, &vtstat); |
42 | printf("%d\n", vtstat.v_active); |
43 | |
44 | return EXIT_SUCCESS; |
45 | } |
46 |