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/* 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"
#define VT_ACTIVATE 0x5606
#define VT_WAITACTIVE 0x5607
/* note get_console_fb() will need to be moved into a seperate lib section */
int get_console_fd()
{
int fd;
fd = open("/dev/console", O_RDWR);
if (fd >= 0)
return fd;
fd = open("/dev/vc/0", O_RDWR);
if (fd >= 0)
return fd;
fd = open("/dev/tty", O_RDWR);
if (fd >= 0)
return fd;
return -1;
}
void chvt_main(void)
{
int vtnum,fd;
if(!*toys.optargs)
return;
vtnum=atoi(*toys.optargs);
fd=get_console_fd();
if (fd < 0)
return;
if (ioctl(fd,VT_ACTIVATE,vtnum))
return;
if (ioctl(fd,VT_WAITACTIVE,vtnum))
return;
}
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