fflush the \o file, if any, after each backslash command. We already

do this for ordinary SQL commands, so it seems consistent to do it for
backslash commands too.  Per gripe from Rajesh Kumar Mallah.

src/bin/psql/command.c

@@ -3,7 +3,7 @@
  *
  * Copyright (c) 2000-2006, PostgreSQL Global Development Group
  *
- * $PostgreSQL: pgsql/src/bin/psql/command.c,v 1.175 2006/12/16 00:38:43 adunstan Exp $
+ * $PostgreSQL: pgsql/src/bin/psql/command.c,v 1.176 2006/12/28 00:29:13 tgl Exp $
  */
 #include "postgres_fe.h"
 #include "command.h"
@@ -60,8 +60,8 @@ static bool do_shell(const char *command);
 /*----------
  * HandleSlashCmds:
  *
- * Handles all the different commands that start with '\',
- * ordinarily called by MainLoop().
+ * Handles all the different commands that start with '\'.
+ * Ordinarily called by MainLoop().
  *
  * scan_state is a lexer working state that is set to continue scanning
  * just after the '\'.  The lexer is advanced past the command and all
@@ -148,6 +148,9 @@ HandleSlashCmds(PsqlScanState scan_state,
 
 	free(cmd);
 
+	/* some commands write to queryFout, so make sure output is sent */
+	fflush(pset.queryFout);
+
 	return status;
 }