From a5b2f9300c50db49541589a822e5eef90cae798e Mon Sep 17 00:00:00 2001
From: Jeremy Allison <jra@samba.org>
Date: Mon, 23 Nov 2009 15:01:34 -0800
Subject: [PATCH] Proper fix for #6898 - Samba duplicates file content on
 appending. Pointed out by Volker.Restores the pathname handling for
 FILE_FLAG_POSIX_SEMANTICS but still prevents the O_APPEND problems. Jeremy.
 (cherry picked from commit f8bd0559ada056722d7d5ae0286753e7c591650b) (cherry
 picked from commit 45bbbb04fb9a8ff8eaa3b64c8cae42c5b8a77027)

---
 source3/include/smb.h   |  1 +
 source3/smbd/filename.c |  3 ++-
 source3/smbd/nttrans.c  | 30 ++++++++++++++++++------------
 3 files changed, 21 insertions(+), 13 deletions(-)

diff --git a/source3/include/smb.h b/source3/include/smb.h
index a3acb7c415d..09689840280 100644
--- a/source3/include/smb.h
+++ b/source3/include/smb.h
@@ -1954,6 +1954,7 @@ struct smb_file_time {
 #define UCF_SAVE_LCOMP			0x00000001
 #define UCF_ALWAYS_ALLOW_WCARD_LCOMP	0x00000002
 #define UCF_COND_ALLOW_WCARD_LCOMP	0x00000004
+#define UCF_POSIX_PATHNAMES		0x00000008
 
 /*
  * smb_filename
diff --git a/source3/smbd/filename.c b/source3/smbd/filename.c
index 5d6661df2a1..16e36312bbf 100644
--- a/source3/smbd/filename.c
+++ b/source3/smbd/filename.c
@@ -238,7 +238,8 @@ NTSTATUS unix_convert(TALLOC_CTX *ctx,
 		}
 	}
 
-	posix_pathnames = lp_posix_pathnames();
+	posix_pathnames = (lp_posix_pathnames() ||
+				(ucf_flags & UCF_POSIX_PATHNAMES));
 
 	/*
 	 * Strip off the stream, and add it back when we're done with the
diff --git a/source3/smbd/nttrans.c b/source3/smbd/nttrans.c
index 5c6d78089d7..9e982911b9c 100644
--- a/source3/smbd/nttrans.c
+++ b/source3/smbd/nttrans.c
@@ -418,11 +418,6 @@ void reply_ntcreate_and_X(struct smb_request *req)
 	flags = IVAL(req->vwv+3, 1);
 	access_mask = IVAL(req->vwv+7, 1);
 	file_attributes = IVAL(req->vwv+13, 1);
-	/*
-	 * Bug #6898 - clients using Windows opens should
-	 * never be able to set this attribute.
-	 */
-	file_attributes &= ~FILE_FLAG_POSIX_SEMANTICS;
 	share_access = IVAL(req->vwv+15, 1);
 	create_disposition = IVAL(req->vwv+17, 1);
 	create_options = IVAL(req->vwv+19, 1);
@@ -483,7 +478,8 @@ void reply_ntcreate_and_X(struct smb_request *req)
 				conn,
 				req->flags2 & FLAGS2_DFS_PATHNAMES,
 				fname,
-				0,
+				(file_attributes & FILE_FLAG_POSIX_SEMANTICS) ?
+					UCF_POSIX_PATHNAMES : 0,
 				NULL,
 				&smb_fname);
 
@@ -498,6 +494,13 @@ void reply_ntcreate_and_X(struct smb_request *req)
 		goto out;
 	}
 
+	/*
+	 * Bug #6898 - clients using Windows opens should
+	 * never be able to set this attribute into the
+	 * VFS.
+	 */
+	file_attributes &= ~FILE_FLAG_POSIX_SEMANTICS;
+
 	status = SMB_VFS_CREATE_FILE(
 		conn,					/* conn */
 		req,					/* req */
@@ -918,11 +921,6 @@ static void call_nt_transact_create(connection_struct *conn,
 	flags = IVAL(params,0);
 	access_mask = IVAL(params,8);
 	file_attributes = IVAL(params,20);
-	/*
-	 * Bug #6898 - clients using Windows opens should
-	 * never be able to set this attribute.
-	 */
-	file_attributes &= ~FILE_FLAG_POSIX_SEMANTICS;
 	share_access = IVAL(params,24);
 	create_disposition = IVAL(params,28);
 	create_options = IVAL(params,32);
@@ -1004,7 +1002,8 @@ static void call_nt_transact_create(connection_struct *conn,
 				conn,
 				req->flags2 & FLAGS2_DFS_PATHNAMES,
 				fname,
-				0,
+				(file_attributes & FILE_FLAG_POSIX_SEMANTICS) ?
+					UCF_POSIX_PATHNAMES : 0,
 				NULL,
 				&smb_fname);
 
@@ -1025,6 +1024,13 @@ static void call_nt_transact_create(connection_struct *conn,
 			? BATCH_OPLOCK : 0;
 	}
 
+	/*
+	 * Bug #6898 - clients using Windows opens should
+	 * never be able to set this attribute into the
+	 * VFS.
+	 */
+	file_attributes &= ~FILE_FLAG_POSIX_SEMANTICS;
+
 	status = SMB_VFS_CREATE_FILE(
 		conn,					/* conn */
 		req,					/* req */
-- 
2.11.4.GIT