1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
/* vi: set sw=4 ts=4:
*
* chvt.c - switch virtual terminals
*
* Copyright (C) 2008 David Anders <danders@amltd.com>
*
* Not in SUSv3.
USE_CHVT(NEWTOY(chvt, "<1", TOYFLAG_USR|TOYFLAG_SBIN))
config CHVT
bool "chvt"
default y
help
usage: chvt N
Change to virtual terminal number N. (This only works in text mode.)
Virtual terminals are the Linux VGA text mode displays, ordinarily
switched between via alt-F1, alt-F2, etc. Use ctrl-alt-F1 to switch
from X to a virtual terminal, and alt-F6 (or F7, or F8) to get back.
*/
#include "toys.h"
/* Note: get_console_fb() will need to be moved into a seperate lib section */
int get_console_fd()
{
int fd;
char *consoles[]={"/dev/console", "/dev/vc/0", "/dev/tty", NULL}, **cc;
cc = consoles;
while (*cc) {
fd = open(*cc++, O_RDWR);
if (fd >= 0) return fd;
}
return -1;
}
void chvt_main(void)
{
int vtnum, fd;
vtnum=atoi(*toys.optargs);
fd=get_console_fd();
// These numbers are VT_ACTIVATE and VT_WAITACTIVE from linux/vt.h
if (fd < 0 || ioctl(fd, 0x5606, vtnum) || ioctl(fd, 0x5607, vtnum))
perror_exit(NULL);
}
|
