From c7a953a3188ccb6dfbe49ea66304b3d517b0c628 Mon Sep 17 00:00:00 2001
From: Jeremy Allison <jra@samba.org>
Date: Mon, 19 Mar 2001 07:08:02 +0000
Subject: Added sys_dlopen/sys_dlsym/sys_dlclose. Jeremy. (This used to be
 commit 49f0e7e7143f82bce9dfd8b06e9e515bc0869ab7)

---
 source3/include/includes.h | 13 +++++++++++++
 source3/include/proto.h    |  3 +++
 source3/lib/system.c       | 31 +++++++++++++++++++++++++++++++
 source3/passdb/passdb.c    |  6 +++---
 source3/smbd/vfs.c         |  4 ++--
 5 files changed, 52 insertions(+), 5 deletions(-)

diff --git a/source3/include/includes.h b/source3/include/includes.h
index f81a5e3362..f4dcbde62e 100644
--- a/source3/include/includes.h
+++ b/source3/include/includes.h
@@ -945,5 +945,18 @@ extern int DEBUGLEVEL;
 #define F_SETLKW 14
 #endif
 
+/* Needed for sys_dlopen/sys_dlsym/sys_dlclose */
+#ifndef RTLD_GLOBAL
+#define RTLD_GLOBAL 0
+#endif
+
+#ifndef RTLD_LAZY
+#define RTLD_LAZY 0
+#endif
+
+#ifndef RTLD_NOW
+#define RTLD_NOW 0
+#endif
+
 #endif /* _INCLUDES_H */
 
diff --git a/source3/include/proto.h b/source3/include/proto.h
index 2b79371acc..04480cd8a1 100644
--- a/source3/include/proto.h
+++ b/source3/include/proto.h
@@ -333,6 +333,9 @@ pid_t sys_fork(void);
 pid_t sys_getpid(void);
 int sys_popen(const char *command);
 int sys_pclose(int fd);
+void *sys_dlopen(const char *name, int flags);
+void *sys_dlsym(void *handle, char *symbol);
+int sys_dlclose (void *handle);
 
 /*The following definitions come from  lib/talloc.c  */
 
diff --git a/source3/lib/system.c b/source3/lib/system.c
index 38b2e79ac6..91f4f8a333 100644
--- a/source3/lib/system.c
+++ b/source3/lib/system.c
@@ -1081,3 +1081,34 @@ int sys_pclose(int fd)
 		return -1;
 	return wstatus;
 }
+
+/**************************************************************************
+ Wrappers for dlopen, dlsym, dlclose.
+****************************************************************************/
+
+void *sys_dlopen(const char *name, int flags)
+{
+#ifdef HAVE_LIBDL
+	return dlopen(name, flags);
+#else
+	return NULL;
+#endif
+}
+
+void *sys_dlsym(void *handle, char *symbol)
+{
+#ifdef HAVE_LIBDL
+    return dlsym(handle, symbol);
+#else
+    return NULL;
+#endif
+}
+
+int sys_dlclose (void *handle)
+{
+#ifdef HAVE_LIBDL
+	return dlclose(handle);
+#else
+	return 0;
+#endif
+}
diff --git a/source3/passdb/passdb.c b/source3/passdb/passdb.c
index 404163c67b..2b318eca53 100644
--- a/source3/passdb/passdb.c
+++ b/source3/passdb/passdb.c
@@ -51,14 +51,14 @@ BOOL initialize_password_db(BOOL reload)
 	/* load another module? */
 	if (reload && pdb_handle)
 	{
-		dlclose (pdb_handle);
+		sys_dlclose (pdb_handle);
 		pdb_handle = NULL;
 	}
 	
 	/* do we have a module defined or use the default? */
 	if (strlen (modulename) != 0)
 	{
-		if ((pdb_handle=dlopen (modulename, RTLD_LAZY)) == NULL)
+		if ((pdb_handle=sys_dlopen (modulename, RTLD_LAZY)) == NULL)
 		{
 			DEBUG(0,("initialize_password_db: ERROR - Unable to open passdb module \"%s\"!\n%s\n",
 				modulename, dlerror()));
@@ -71,7 +71,7 @@ BOOL initialize_password_db(BOOL reload)
 	   to open.  Let's try the default */
 	if (pdb_handle == NULL)
 	{
-		if ((pdb_handle=dlopen ("libpdbfile.so", RTLD_LAZY)) == NULL)
+		if ((pdb_handle=sys_dlopen ("libpdbfile.so", RTLD_LAZY)) == NULL)
 		{
 			DEBUG(0,("initialize_password_db: ERROR - Unable to open \"libpdbfile.so\" passdb module!  No user authentication possible!\n%s\n",
 				dlerror()));
diff --git a/source3/smbd/vfs.c b/source3/smbd/vfs.c
index b8aa290cab..b41e1f27fd 100644
--- a/source3/smbd/vfs.c
+++ b/source3/smbd/vfs.c
@@ -105,14 +105,14 @@ BOOL vfs_init_custom(connection_struct *conn)
 
     /* Open object file */
 
-    if ((conn->dl_handle = dlopen(lp_vfsobj(SNUM(conn)), RTLD_NOW | RTLD_GLOBAL)) == NULL) {
+    if ((conn->dl_handle = sys_dlopen(lp_vfsobj(SNUM(conn)), RTLD_NOW | RTLD_GLOBAL)) == NULL) {
 		DEBUG(0, ("Error opening %s: %s\n", lp_vfsobj(SNUM(conn)), dlerror()));
 		return False;
     }
 
     /* Get handle on vfs_init() symbol */
 
-    init_fptr = (struct vfs_ops *(*)(int *))dlsym(conn->dl_handle, "vfs_init");
+    init_fptr = (struct vfs_ops *(*)(int *))sys_dlsym(conn->dl_handle, "vfs_init");
 
     if (init_fptr == NULL) {
 		DEBUG(0, ("No vfs_init() symbol found in %s\n",
-- 
cgit