Wed Mar 4 16:53:52 1998 Martin M. Hunt <hunt@cygnus.com>

* serial.c (_initialize_serial): Add a description of
	"set remotelogbase".

	* command.c (do_setshow_command): If no arguments are supplied,
	don't dump core, instead print out an error message.

gdb/ChangeLog

@@ -1,3 +1,11 @@
+Wed Mar  4 16:53:52 1998  Martin M. Hunt  <hunt@cygnus.com>
+
+	* serial.c (_initialize_serial): Add a description of 
+	"set remotelogbase".
+
+	* command.c (do_setshow_command): If no arguments are supplied,
+	don't dump core, instead print out an error message.
+
 Wed Mar  4 16:50:18 1998  Jason Molenda  (crash@bugshack.cygnus.com)
 
 	* gdbtk.c (gdb_listfiles): Fix thinko in last change.

gdb/command.c

@@ -281,7 +281,6 @@ add_set_enum_cmd (name, class, enumlist, var, doc, list)
 {
   struct cmd_list_element *c
     = add_set_cmd (name, class, var_enum, var, doc, list);
-
   c->enums = enumlist;
 
   return c;
@@ -1269,6 +1268,21 @@ do_setshow_command (arg, from_tty, c)
 	    char *match = NULL;
 	    char *p;
 
+	    /* if no argument was supplied, print an informative error message */
+	    if (arg == NULL)
+	      {
+		char msg[1024];
+		strcpy (msg, "Requires an argument. Valid arguments are ");
+		for (i = 0; c->enums[i]; i++)
+		  {
+		    if (i != 0)
+		      strcat (msg, ", ");
+		    strcat (msg, c->enums[i]);
+		  }
+		strcat (msg, ".");
+		error (msg);
+	      }
+
 	    p = strchr (arg, ' ');
 	    
 	    if (p)

gdb/serial.c

@@ -517,7 +517,7 @@ by gdbserver.", &setlist),
   add_show_from_set (add_set_enum_cmd ("remotelogbase", no_class,
 				       logbase_enums,
 				       (char *)&serial_logbase,
-				       "Set ...",
+				       "Set numerical base for remote session logging",
 				       &setlist),
 			   &showlist);
 }