Description: show a dialog box if files are missing
Author: Alexandre Detiste <alexandre.detiste@gmail.com>,
        Fabian Greffrath <fabian@debian.org>
Bug-Debian: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=790407

--- a/rott/rt_util.c
+++ b/rott/rt_util.c
@@ -446,6 +446,34 @@ void Error (char *error, ...)
    #if USE_SDL
    SDL_Quit();
    #endif
+   #ifdef PLATFORM_UNIX
+   char* argv[6];
+   char zenity_buf[300] = "--text=\0";
+   strncat(zenity_buf,msgbuf,sizeof(zenity_buf)-8);
+   pid_t child_pid;
+   child_pid = fork();
+   if(child_pid == 0) {
+       argv[0] = "zenity";
+       argv[1] = "--error";
+       argv[2] = zenity_buf;
+       argv[3] = "--title=ROTT";
+       argv[4] = NULL;
+       execvp(argv[0], argv);
+       argv[0] = "kdialog";
+       argv[2] = msgbuf;
+       execvp(argv[0], argv);
+       argv[0] = "xmessage";
+       argv[1] = "-center";
+       argv[3] = NULL;
+       execvp(argv[0], argv);
+       argv[0] = "notify-send";
+       argv[1] = "ROTT";
+       argv[3] = "-i";
+       argv[4] = "dialog-error";
+       argv[5] = NULL;
+       execvp(argv[0], argv);
+   }
+   #endif
 
    exit (1);
 }
--- a/rott/w_wad.c
+++ b/rott/w_wad.c
@@ -235,7 +235,8 @@ void W_InitMultipleFiles (char **filenam
                 W_AddFile (*filenames);
 
         if (!numlumps)
-                Error ("W_InitFiles: no files found");
+                Error ("W_InitFiles: One or more of the required ROTT 1.3 data files could not be found.\n\
+                Please read the README.Debian file.");
 
 //
 // set up caching