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#!/bin/sh -- # A comment mentioning perl
eval 'exec perl -S $0 ${1+"$@"}'
if 0;
#
# vcinject.pl: simple hack to inject keystrokes into Linux VC tty.
# See LinuxVNC.c for a more careful treatment using C and public API.
#
# Usage: vcinject.pl <N> (or /dev/ttyN)
#
# This is an example x11vnc -pipeinput program E.g.:
#
# x11vnc -rawfb map:/dev/fb0@1024x768x16 -pipeinput "vcinject.pl /dev/tty3"
#
# (see fbset(8) for obtaining fb info).
#
# It reads lines like this from STDIN:
#
# Keysym <id> <down> <n> <Keysym> ...
#
# <id> is ignored, it uses the rest to deduce the keystrokes to send
# to the console.
#
$tty = shift;
$tty = "/dev/tty$tty" if $tty =~ /^\d+$/;
warn "strange tty device: $tty\n" if $tty !~ m,^/dev/tty\d+$,;
open(TTY, ">$tty") || die "open $tty: $!\n";
$fd = fileno(TTY);
$linux_ioctl_syscall = 54; # common knowledge, eh? :-)
$TIOCSTI = 0x5412;
%Map = qw(
Escape 27
Tab 9
Return 13
BackSpace 8
Home 1
End 5
Up 16
Down 14
Right 6
Left 2
Next 6
Prior 2
);
# the latter few above seem to be vi specials. (since they are normally
# escape sequences, e.g. ESC [ 5 ~)
sub lookup {
my($down, $key, $name) = @_;
my $n = -1;
$name =~ s/^KP_//;
# algorithm borrowed from LinuxVNC.c:
if (! $down) {
if ($name =~ /^Control/) {
$control--;
}
return $n;
}
if ($name =~ /^Control/) {
$control++;
} else {
if (exists($Map{$name})) {
$n = $Map{$name};
}
if ($control && $name =~ /^[A-z]$/) {
$n = ord($name);
# shift down to the Control zone:
if ($name =~ /[a-z]/) {
$n -= (ord("a") - 1);
} else {
$n -= (ord("A") - 1);
}
}
if ($n < 0 && $key < 256) {
$n = $key;
}
}
return $n;
}
$control = 0;
$debug = 0;
while (<>) {
chomp;
if (/^\w+$/) {
# for debugging, you type the keysym in manually.
$_ = "Keysym 1 0 999 $_ None";
}
next unless /^Keysym/;
my ($j, $id, $down, $k, $keysym, $rest) = split(' ', $_);
$n = lookup($down, $k, $keysym);
if ($n < 0 || $n > 255) {
print STDERR "skip: '$keysym' -> $n\n" if $down && $debug;
next;
}
$n_p = pack("c", $n);
$ret = syscall($linux_ioctl_syscall, $fd, $TIOCSTI, $n_p);
print STDERR "ctrl=$control $keysym/$k syscall(" .
"$linux_ioctl_syscall, $fd, $TIOCSTI, $n) = $ret\n" if $debug;
}
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