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Add an -S option that allows the user to disable vty switching. It is

Browse Source 
implemented using a new VT_LOCKSWITCH ioctl.  Although it is possible
to implement something like this by VT_SETMODEing to VT_PROCESS and
never releasing the vty, that method has a number of downsides, the
biggest of which is that some program has to stay resident for the
lock to be in effect.

Reviewed by:	roam, sheldonh
This commit is contained in:
Dima Dorfman 2002-07-10 03:31:25 +00:00
parent ce907d4246
commit b471ed9e9d
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=99705
2 changed files with 29 additions and 3 deletions
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8
usr.sbin/vidcontrol/vidcontrol.1
View File

@ -13,7 +13,7 @@
.\" @(#)vidcontrol.1
.\" $FreeBSD$
.\"
.Dd May 27, 2001
.Dd May 27, 2002
.Dt VIDCONTROL 1
.Os
.Sh NAME
@ -36,6 +36,7 @@
.Op Fl M Ar char
.Op Fl m Cm on | off
.Op Fl r Ar foreground Ar background
.Op Fl S Cm on | off
.Op Fl s Ar number
.Op Fl t Ar N | Cm off
.Op Ar mode
@ -213,6 +214,11 @@ Change reverse mode colors to
.Ar foreground
and
.Ar background .
.It Fl S Cm on | off
Turn vty switching on or off.
When vty switching is off,
attempts to switch to a different virtual terminal will fail.
(The default is to permit vty switching.)
.It Fl s Ar number
Set the current vty to
.Ar number .

24
usr.sbin/vidcontrol/vidcontrol.c
View File

@ -76,7 +76,7 @@ usage()
"usage: vidcontrol [-CdLPpx] [-b color] [-c appearance] [-f [size] file]",
" [-g geometry] [-h size] [-i adapter | mode] [-l screen_map]",
" [-m on | off] [-M char] [-r foreground background] [-s num]",
" [-t N | off] [mode] [foreground [background]] [show]");
" [-S on | off] [-t N | off] [mode] [foreground [background]] [show]");
exit(1);
}
@ -518,6 +518,23 @@ set_mouse(char *arg)
ioctl(0, CONS_MOUSECTL, &mouse);
}
void
set_lockswitch(char *arg)
{
int data;
if (!strcmp(arg, "off"))
data = 0x01;
else if (!strcmp(arg, "on"))
data = 0x02;
else {
warnx("argument to -S must either on or off");
return;
}
if (ioctl(0, VT_LOCKSWITCH, &data) == -1)
warn("ioctl(VT_LOCKSWITCH)");
}
static char
*adapter_name(int type)
{
@ -749,7 +766,7 @@ main(int argc, char **argv)
/* Not reached */
if (ioctl(0, CONS_GETINFO, &info) < 0)
err(1, "must be on a virtual console");
while((opt = getopt(argc, argv, "b:Cc:df:g:h:i:l:LM:m:pPr:s:t:x")) != -1)
while((opt = getopt(argc, argv, "b:Cc:df:g:h:i:l:LM:m:pPr:S:s:t:x")) != -1)
switch(opt) {
case 'b':
set_border_color(optarg);
@ -806,6 +823,9 @@ main(int argc, char **argv)
case 'r':
set_reverse_colors(argc, argv, &optind);
break;
case 'S':
set_lockswitch(optarg);
break;
case 's':
set_console(optarg);
break;