Fix open problem with changing attributes on an existing file - based

on work by  <steve@griffin.sio2.nl>.
Jeremy.
(This used to be commit 465d86d95fbdeda423d1f4b06cee46c119a31447)

1 files changed, 45 insertions, 7 deletions

diff --git a/source3/smbd/open.c b/source3/smbd/open.c
index dcd901afaf..5c3359fc6b 100644
--- a/source3/smbd/open.c
+++ b/source3/smbd/open.c
@@ -698,7 +698,8 @@ static void kernel_flock(files_struct *fsp, int deny_mode)
 }
 
 
-static BOOL open_match_attributes(connection_struct *conn, char *path, mode_t existing_mode, mode_t new_mode)
+static BOOL open_match_attributes(connection_struct *conn, char *path, mode_t existing_mode,
+		mode_t new_mode, mode_t *returned_mode)
 {
 	uint32 old_dos_mode, new_dos_mode;
 	SMB_STRUCT_STAT sbuf;
@@ -711,22 +712,33 @@ static BOOL open_match_attributes(connection_struct *conn, char *path, mode_t ex
 	sbuf.st_mode = new_mode;
 	new_dos_mode = dos_mode(conn, path, &sbuf);
 
+	/*
+	 * We only set returned mode to be the same as new_mode if
+	 * the file attributes need to be changed.
+	 */
+
+	*returned_mode = (mode_t)0;
+
 	/* If we're mapping SYSTEM and HIDDEN ensure they match. */
 	if (lp_map_system(SNUM(conn))) {
 		if ((old_dos_mode & FILE_ATTRIBUTE_SYSTEM) && !(new_dos_mode & FILE_ATTRIBUTE_SYSTEM))
 			return False;
+		if  (!(old_dos_mode & FILE_ATTRIBUTE_SYSTEM) && (new_dos_mode & FILE_ATTRIBUTE_SYSTEM))
+			*returned_mode = new_mode;
 	}
 	if (lp_map_hidden(SNUM(conn))) {
 		if ((old_dos_mode & FILE_ATTRIBUTE_HIDDEN) && !(new_dos_mode & FILE_ATTRIBUTE_HIDDEN))
 			return False;
+		if (!(old_dos_mode & FILE_ATTRIBUTE_HIDDEN) && (new_dos_mode & FILE_ATTRIBUTE_HIDDEN))
+			*returned_mode = new_mode;
 	}
 	return True;
 }
 
 /****************************************************************************
- Open a file with a share mode. On output from this open we are guarenteeing
- that 
+ Open a file with a share mode.
 ****************************************************************************/
+
 files_struct *open_file_shared(connection_struct *conn,char *fname, SMB_STRUCT_STAT *psbuf, 
 			       int share_mode,int ofun, mode_t mode,int oplock_request, 
 			       int *Access,int *action)
@@ -736,9 +748,9 @@ files_struct *open_file_shared(connection_struct *conn,char *fname, SMB_STRUCT_S
 }
 
 /****************************************************************************
- Open a file with a share mode. On output from this open we are guarenteeing
- that 
+ Open a file with a share mode.
 ****************************************************************************/
+
 files_struct *open_file_shared1(connection_struct *conn,char *fname, SMB_STRUCT_STAT *psbuf, 
 				uint32 desired_access, 
 				int share_mode,int ofun, mode_t mode,int oplock_request, 
@@ -760,6 +772,7 @@ files_struct *open_file_shared1(connection_struct *conn,char *fname, SMB_STRUCT_
 	files_struct *fsp = NULL;
 	int open_mode=0;
 	uint16 port = 0;
+	mode_t new_mode = (mode_t)0;
 
 	if (conn->printer) {
 		/* printers are handled completely differently. Most of the passed parameters are
@@ -819,7 +832,7 @@ files_struct *open_file_shared1(connection_struct *conn,char *fname, SMB_STRUCT_
 
 	/* We only care about matching attributes on file exists and truncate. */
 	if (file_existed && (GET_FILE_OPEN_DISPOSITION(ofun) == FILE_EXISTS_TRUNCATE)) {
-		if (!open_match_attributes(conn, fname, psbuf->st_mode, mode)) {
+		if (!open_match_attributes(conn, fname, psbuf->st_mode, mode, &new_mode)) {
 			DEBUG(5,("open_file_shared: attributes missmatch for file %s (0%o, 0%o)\n",
 						fname, psbuf->st_mode, mode ));
 			file_free(fsp);
@@ -1089,11 +1102,36 @@ flags=0x%X flags2=0x%X mode=0%o returned %d\n",
 	 */
 
 	if (!file_existed && !def_acl && (conn->vfs_ops.fchmod_acl != NULL)) {
+
 		int saved_errno = errno; /* We might get ENOSYS in the next call.. */
+
 		if (conn->vfs_ops.fchmod_acl(fsp, fsp->fd, mode) == -1 && errno == ENOSYS)
 			errno = saved_errno; /* Ignore ENOSYS */
+
+	} else if (new_mode) {
+
+		int ret = -1;
+
+		/* Attributes need changing. File already existed. */
+
+		if (conn->vfs_ops.fchmod_acl != NULL) {
+			int saved_errno = errno; /* We might get ENOSYS in the next call.. */
+			ret = conn->vfs_ops.fchmod_acl(fsp, fsp->fd, new_mode);
+
+			if (ret == -1 && errno == ENOSYS) {
+				errno = saved_errno; /* Ignore ENOSYS */
+			} else {
+				DEBUG(5, ("open_file_shared: failed to reset attributes of file %s to 0%o\n",
+					fname, (int)new_mode));
+				ret = 0; /* Don't do the fchmod below. */
+			}
+		}
+
+		if ((ret == -1) && (conn->vfs_ops.fchmod(fsp, fsp->fd, new_mode) == -1))
+			DEBUG(5, ("open_file_shared: failed to reset attributes of file %s to 0%o\n",
+				fname, (int)new_mode));
 	}
-		
+
 	unlock_share_entry_fsp(fsp);
 
 	conn->num_files_open++;