--- tethereal.c.ori     2006-07-08 14:31:50.000000000 +0200
+++ tethereal.c 2006-07-10 13:33:33.000000000 +0200
@@ -261,6 +261,7 @@
   fprintf(output, "\n");
   fprintf(output, "Processing:\n");
   fprintf(output, "  -R <read filter>         packet filter in Ethereal display filter syntax\n");
+  fprintf(output, "  -A file                  Use file as input for the Ethereal display filter syntax\n");
   fprintf(output, "  -n                       disable all name resolutions (def: all enabled)\n");
   fprintf(output, "  -N <name resolve flags>  enable specific name resolution(s): \"mntC\"\n");
   fprintf(output, "  -d %s ...\n", decode_as_arg_template);
@@ -693,8 +694,9 @@
   char                 badopt;
   GLogLevelFlags       log_flags;
   int                  status;
+  FILE                *fp;
 
-#define OPTSTRING_INIT "a:b:c:d:Df:F:hi:lLnN:o:pqr:R:s:St:T:vVw:xX:y:z:"
+#define OPTSTRING_INIT "a:b:c:d:Df:F:hi:lLnN:o:pqr:A:R:s:St:T:vVw:xX:y:z:"
 #ifdef HAVE_LIBPCAP
 #ifdef _WIN32
 #define OPTSTRING_WIN32 "B:"
@@ -990,6 +992,16 @@
       case 'R':        /* Read file filter */
         rfilter = optarg;
         break;
+      case 'A':        /* Read file filter syntax */
+        fp = fopen(g_strdup(optarg), "r");
+        if (! fp)
+          cmdarg_err("file not found: %s", optarg);
+          exit(1);
+        char line[256];
+        fgets(line, sizeof(line), fp);
+        cmdarg_err("load filter= %s", line);
+        fclose(fp);
+        rfilter = line;
+        break;
       case 'S':        /* show packets in real time */
         print_packet_info = TRUE;
         break;