bsd@cs.ubc.ca (Brian de Alwis) writes:
> So my question: I was wondering if there was a way to do this VT-switching
> programmatically. It would be trivial to then incorporate this into
> the APM scripts. I'm using wscons; wsconsctl doesn't seem to have
> the ability to do this though.  Is there any way of doing this?

I have been using attached currentscreen/switchtoscreen programs to
fix similar problem. My /etc/apm/script looks like this (the reason I
wait until the currentscreen really returns 1 is that my machine used
to crash immediately if I tried to suspend while X was displayed):
----------------------------------------------------------------------
...

SCREENNO=/var/run/apm-screenno
...
switch_to_vt0() {
    /usr/sbin/switchtoscreen 1
    while [ `/usr/sbin/currentscreen` != 1 ]
    do
	sleep 1
    done
}

switch_to_back() {
    /usr/sbin/switchtoscreen `cat $SCREENNO`  
    rm -f $SCREENNO
}

store_current_screen() {
    if [ ! -f $SCREENNO ]; then
	/usr/sbin/currentscreen > $SCREENNO
    fi
}

...
case $0 in
*suspend)	
...
	store_current_screen
	switch_to_vt0
...
	;;

*standby)
...
	store_current_screen
	switch_to_vt0
...
	;;

*resume)
...
	switch_to_back
...
	;;
...
----------------------------------------------------------------------
currentscreen.c:
----------------------------------------------------------------------
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <dev/wscons/wsdisplay_usl_io.h>

int main(int argc, char **argv)
{
  int f, data;
  char *file;

  if (argc == 1)
    file = "/dev/ttyEcfg";
  else
    file = argv[1];
  f = open(file, O_RDWR, 0000);
  if (f < 0)
    {
      perror("File open failed");
      exit(1);
    }
  if (ioctl(f, VT_GETACTIVE, &data) < 0)
    {
      perror("Ioctl failed");
      exit(2);
    }
  printf("%d\n", data);
  close(f);
  exit(0);
}
----------------------------------------------------------------------
switchtoscreen.c:
----------------------------------------------------------------------
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <dev/wscons/wsdisplay_usl_io.h>

int main(int argc, char **argv)
{
  int f, data;
  char *file;

  if (argc == 1)
    data = 1;
  else
    data = atoi(argv[1]);
  if (argc <= 2)
    file = "/dev/ttyEcfg";
  else
    file = argv[2];
  if (data == 0)
    exit(3);
  f = open(file, O_RDWR, 0000);
  if (f < 0)
    {
      perror("File open failed");
      exit(1);
    }
  if (ioctl(f, VT_ACTIVATE, data) < 0)
    {
      perror("Ioctl failed");
      exit(2);
    }
  close(f);
  exit(0);
}
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