Committing patch to fall back to dialog if DISPLAY not set from

Kevin C. Krinke  <kckrinke@opendoorsoftware.com>

1 files changed, 77 insertions, 0 deletions

diff --git a/src/gdialog.in b/src/gdialog.in
index a27c0e9..48699d8 100755
--- a/src/gdialog.in
+++ b/src/gdialog.in
@@ -20,6 +20,83 @@ my $argn = 0;			# counter for walking args
 my $args = $#ARGV + 1;		# total number of command line arguments
 my $separator = 0;		# set if --separate-output is in use
 
+
+# Additon by: Kevin C. Krinke (kck) <kckrinke@opendoorsoftware.com>
+#
+# gdialog itself supports both the X-Windows interface as well as a console
+# interface. Here's a fix to use regular dialog when appropriate.
+# This should probably be a more advanced test of some sort, but I don't know
+# of any other easy way of detecting and X-Windows environment. If someone does
+# know better, please let me know. So for now this works: "no DISPLAY; no X".
+
+unless (defined $ENV{'DISPLAY'} && length($ENV{'DISPLAY'})) {
+
+        # reset the command string
+
+        $command = "";
+
+        # examine all the available/default paths
+
+        my $PATHS = ($ENV{'PATH'}||'/bin:/usr/bin:/usr/local/bin:/opt/bin');
+
+      BIN: foreach my $PATH (split(/\:/,$PATHS)) {
+
+                if (-x $PATH."/gdialog.real") {
+
+			# Some GNU/Linux distributions divert binaries when
+			# other packages are installed. If this exists, chances
+			# are it's the real gdialog and not the Zenity wrapper.
+			# gdialog has full support for the Console medium and
+			# as such is the preference over using the "regular"
+			# dialog interface.
+
+                        $command = $PATH."/gdialog.real ";
+                        last BIN;
+
+                } elsif (-x $PATH."/dialog") {
+
+                        # change the command and skip ahead!
+
+                        $command = $PATH."/dialog ";
+                        last BIN;
+
+                }
+
+
+        }
+
+        unless ($command) {
+
+		# we didn't find the dialog binary, exit(254) with a message
+		# to STDERR.
+
+                print STDERR "missing DISPLAY and a console dialog could".
+                             " not be found.\n";
+
+		# exit code 254 is used because 255, 1, 2, 3 are used by Zenity
+		# and cDialog. This error, is a very _bad_ error so it's semi-
+		# non-standard at 254.
+
+                exit(254);
+
+        }
+
+	# all is well if we've made it this far
+
+	# so join the arguments double-quoting things so that proper shell
+	# notation is saved.
+
+        $command .= '"'.join('" "',@ARGV).'"';
+
+	# and fork the process
+
+        exec($command);
+
+}
+
+# Got DISPLAY, has X continue as normal...
+# End Addtition by: KCK
+
 # this just loads the current arg into $element
 
 sub get_arg () {