x11vnc: -rawfb, -pipeinput, -xtrap, -flag, ...

1 files changed, 113 insertions, 0 deletions

diff --git a/x11vnc/misc/vcinject.pl b/x11vnc/misc/vcinject.pl
new file mode 100755
index 0000000..b371d4e
--- /dev/null
+++ b/x11vnc/misc/vcinject.pl
@@ -0,0 +1,113 @@
+  #!/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;
+
+}