From 3a2ef591168395149df9f2ad160d242ffe825e41 Mon Sep 17 00:00:00 2001
From: Tom Lane <tgl@sss.pgh.pa.us>
Date: Tue, 15 Oct 2002 16:04:17 +0000
Subject: [PATCH] Fix Linux dynloader code for pre-HAVE_DLOPEN systems, which
 evidently are still in use out there.  Per report from Brendan LeFebvre.

---
 src/backend/port/dynloader/linux.c | 38 ++++++++++++++++++++++++------
 src/backend/port/dynloader/linux.h | 19 +++------------
 2 files changed, 34 insertions(+), 23 deletions(-)

diff --git a/src/backend/port/dynloader/linux.c b/src/backend/port/dynloader/linux.c
index 874de90d3a..2ee15661cd 100644
--- a/src/backend/port/dynloader/linux.c
+++ b/src/backend/port/dynloader/linux.c
@@ -1,6 +1,6 @@
 /*-------------------------------------------------------------------------
  *
- * dynloader.c
+ * linux.c
  *	  Dynamic Loader for Postgres for Linux, generated from those for
  *	  Ultrix.
  *
@@ -11,18 +11,22 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/port/dynloader/linux.c,v 1.22 2002/06/20 20:29:33 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/port/dynloader/linux.c,v 1.23 2002/10/15 16:04:17 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
 
 #include "postgres.h"
+
 #ifdef HAVE_DLD_H
-#include "dld.h"
+#include <dld.h>
 #endif
 
-#ifdef NOT_USED
-extern char pg_pathname[];
+#include "dynloader.h"
+#include "miscadmin.h"
+
+
+#ifndef HAVE_DLOPEN
 
 void *
 pg_dlopen(char *filename)
@@ -98,8 +102,28 @@ pg_dlopen(char *filename)
 #endif
 }
 
+PGFunction
+pg_dlsym(void *handle, char *funcname)
+{
+#ifndef HAVE_DLD_H
+	return NULL;
+#else
+	return (PGFunction) dld_get_func((funcname));
+#endif
+}
+
+void
+pg_dlclose(void *handle)
+{
+#ifndef HAVE_DLD_H
+#else
+	dld_unlink_by_file(handle, 1);
+	free(handle);
+#endif
+}
+
 char *
-pg_dlerror()
+pg_dlerror(void)
 {
 #ifndef HAVE_DLD_H
 	return "dynaloader unspported";
@@ -108,4 +132,4 @@ pg_dlerror()
 #endif
 }
 
-#endif
+#endif /* !HAVE_DLOPEN */
diff --git a/src/backend/port/dynloader/linux.h b/src/backend/port/dynloader/linux.h
index 79cc068201..0adbdf8edf 100644
--- a/src/backend/port/dynloader/linux.h
+++ b/src/backend/port/dynloader/linux.h
@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $Id: linux.h,v 1.18 2002/06/20 20:29:33 momjian Exp $
+ * $Id: linux.h,v 1.19 2002/10/15 16:04:17 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -20,21 +20,7 @@
 #endif
 
 
-#ifndef HAVE_DLOPEN
-
-#ifndef HAVE_DLD_H
-#define pg_dlsym(handle, funcname)		(NULL)
-#define pg_dlclose(handle)			   {}
-#else
-#define pg_dlsym(handle, funcname)		((PGFunction) dld_get_func((funcname)))
-#define pg_dlclose(handle) \
-do { \
-	dld_unlink_by_file(handle, 1); \
-	free(handle); \
-} while (0)
-#endif
-
-#else							/* HAVE_DLOPEN */
+#ifdef HAVE_DLOPEN
 
 /*
  * In some older systems, the RTLD_NOW flag isn't defined and the mode
@@ -53,6 +39,7 @@ do { \
 #define pg_dlsym		dlsym
 #define pg_dlclose		dlclose
 #define pg_dlerror		dlerror
+
 #endif   /* HAVE_DLOPEN */
 
 #endif   /* PORT_PROTOS_H */