Add plugin support for the sam system from metze (based on passdb code)

(This used to be commit 61626340e506d32a6560a162005b43f10445fbb9)

2 files changed, 82 insertions, 1 deletions

diff --git a/source3/Makefile.in b/source3/Makefile.in
index e466c56fb5..93f3a97fb5 100644
--- a/source3/Makefile.in
+++ b/source3/Makefile.in
@@ -217,8 +217,10 @@ PASSDB_OBJ = $(PASSDB_GET_SET_OBJ) passdb/passdb.o passdb/pdb_interface.o \
 		passdb/pdb_unix.o passdb/util_sam_sid.o \
 		passdb/pdb_compat.o passdb/pdb_nisplus.o
 
+SAM_STATIC_MODULES = sam/sam_plugin.o
+
 SAM_OBJ = sam/account.o sam/get_set_account.o sam/get_set_group.o \
-		sam/get_set_domain.o sam/interface.o sam/api.c
+		sam/get_set_domain.o sam/interface.o sam/api.o $(SAM_STATIC_MODULES)
 
 SAMTEST_OBJ = torture/samtest.o $(SAM_OBJ) $(LIB_OBJ) $(PARAM_OBJ) $(LIBSMB_OBJ) $(UBIQX_OBJ) $(LIB_OBJ) $(READLINE_OBJ)
 
diff --git a/source3/sam/sam_plugin.c b/source3/sam/sam_plugin.c
new file mode 100644
index 0000000000..56f8260544
--- /dev/null
+++ b/source3/sam/sam_plugin.c
@@ -0,0 +1,79 @@
+/* 
+   Unix SMB/CIFS implementation.
+   Loadable san module interface.
+   Copyright (C) Jelmer Vernooij			2002
+   Copyright (C) Andrew Bartlett			2002
+   Copyright (C) Stefan (metze) Metzmacher		2002
+      
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_SAM
+
+NTSTATUS sam_init_plugin(SAM_CONTEXT *sam_context, SAM_METHODS **sam_method, const char *location)
+{
+	void * dl_handle;
+	char *plugin_location, *plugin_name, *p;
+	sam_init_function plugin_init;
+	int (*plugin_version)(void);
+
+	if (location == NULL) {
+		DEBUG(0, ("The plugin module needs an argument!\n"));
+		return NT_STATUS_UNSUCCESSFUL;
+	}
+
+	plugin_name = smb_xstrdup(location);
+	p = strchr(plugin_name, ':');
+	if (p) {
+		*p = 0;
+		plugin_location = p+1;
+		trim_string(plugin_location, " ", " ");
+	} else plugin_location = NULL;
+	trim_string(plugin_name, " ", " ");
+
+	DEBUG(5, ("Trying to load sam plugin %s\n", plugin_name));
+	dl_handle = sys_dlopen(plugin_name, RTLD_NOW);
+	if (!dl_handle) {
+		DEBUG(0, ("Failed to load sam plugin %s using sys_dlopen (%s)\n", plugin_name, sys_dlerror()));
+		return NT_STATUS_UNSUCCESSFUL;
+	}
+    
+	plugin_version = sys_dlsym(dl_handle, "sam_version");
+	if (!plugin_version) {
+		sys_dlclose(dl_handle);
+		DEBUG(0, ("Failed to find function 'sam_version' using sys_dlsym in sam plugin %s (%s)\n", plugin_name, sys_dlerror()));	    
+		return NT_STATUS_UNSUCCESSFUL;
+	}
+
+	if (plugin_version()!=SAM_INTERFACE_VERSION) {
+		sys_dlclose(dl_handle);
+		DEBUG(0, ("Wrong SAM_INTERFACE_VERSION! sam plugin has version %d and version %d is needed! Please update!\n",
+			    plugin_version(),SAM_INTERFACE_VERSION));
+		return NT_STATUS_UNSUCCESSFUL;
+	}
+				    	
+	plugin_init = sys_dlsym(dl_handle, "sam_init");
+	if (!plugin_init) {
+		sys_dlclose(dl_handle);
+		DEBUG(0, ("Failed to find function 'sam_init' using sys_dlsym in sam plugin %s (%s)\n", plugin_name, sys_dlerror()));	    
+		return NT_STATUS_UNSUCCESSFUL;
+	}
+
+	DEBUG(5, ("Starting sam plugin %s with location %s\n", plugin_name, plugin_location));
+	return plugin_init(sam_context, sam_method, plugin_location);
+}