--- buffer.c.original	Sun Jun 11 18:40:11 2000
+++ buffer.c	Sat Sep 30 00:03:23 2000
@@ -77,6 +77,11 @@
 static void write_error PARAMS ((int));
 static void read_error PARAMS ((void));
 
+/* The signal-file info */
+extern int use_signal_file;     /* 1 if we should use the signal file in */
+                                /* preference to the usual tty method */ 
+extern char signal_file[];        /* the name of the signal file. */
+ 
 #if !MSDOS
 /* Obnoxious test to see if dimwit is trying to dump the archive.  */
 dev_t ar_dev;
@@ -1502,9 +1507,11 @@
   static FILE *read_file = NULL;
   static int looped = 0;
 
+
+  FILE *sfile_p;
   int status;
 
-  if (!read_file && !info_script_option)
+  if (!read_file && !info_script_option && !use_signal_file)
     /* FIXME: if fopen is used, it will never be closed.  */
     read_file = archive == STDIN ? fopen (TTY_NAME, "r") : stdin;
 
@@ -1541,23 +1548,42 @@
 	while (1)
 	  {
 	    char input_buffer[80];
-
-	    fprintf (stderr,
-		     _("\007Prepare volume #%d for %s and hit return: "),
-		     global_volno, *archive_name_cursor);
-	    fflush (stderr);
-
-	    if (fgets (input_buffer, sizeof (input_buffer), read_file) == 0)
-	      {
-		fprintf (stderr, _("EOF where user reply was expected"));
-
-		if (subcommand_option != EXTRACT_SUBCOMMAND
-		    && subcommand_option != LIST_SUBCOMMAND
-		    && subcommand_option != DIFF_SUBCOMMAND)
-		  WARN ((0, 0, _("WARNING: Archive is incomplete")));
-
-		exit (TAREXIT_FAILURE);
+	    if (use_signal_file) {
+	      fprintf (stderr,
+		       _("Prepare volume #%d for %s\n"),
+		       global_volno, *archive_name_cursor);
+	      fflush (stderr);
+	      /* read input from signal file when it arrives */
+	      input_buffer[0] = 'q';
+	      input_buffer[1] = '\0';
+	      while (1) {
+		sfile_p = fopen(signal_file,"r");
+		if (sfile_p) {
+		  fgets (input_buffer, 2, sfile_p);
+		  fclose(sfile_p);
+		  unlink(signal_file);
+		  fprintf (stderr, _("file %s found - continuing (%s)\n"), signal_file, input_buffer);
+                  fflush(stderr);
+		  break;
+		};
+		sleep(10);
+		fprintf (stderr, _(">") );
+		fflush (stderr);
 	      }
+	    } else {
+	      
+	      if (fgets (input_buffer, sizeof (input_buffer), read_file) == 0)
+		{
+		  fprintf (stderr, _("EOF where user reply was expected"));
+		  
+		  if (subcommand_option != EXTRACT_SUBCOMMAND
+		      && subcommand_option != LIST_SUBCOMMAND
+		      && subcommand_option != DIFF_SUBCOMMAND)
+		    WARN ((0, 0, _("WARNING: Archive is incomplete")));
+		  
+		  exit (TAREXIT_FAILURE);
+		}
+	    }
 	    if (input_buffer[0] == '\n'
 		|| input_buffer[0] == 'y'
 		|| input_buffer[0] == 'Y')