[newlib-cygwin] Cygwin: Move post-dir unlink check

[Corinna Vinschen <corinna@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=0c0ff5dc2103988bda9eee2a97633a8b54bb476e

commit 0c0ff5dc2103988bda9eee2a97633a8b54bb476e
Author: Ben Wijen <ben@wijen.net>
Date:   Wed Jan 20 17:10:51 2021 +0100

    Cygwin: Move post-dir unlink check
    
    Move post-dir unlink check from fhandler_disk_file::rmdir to
    _unlink_nt_post_dir_check
    
    If a directory is not removed through fhandler_disk_file::rmdir
    we can now make sure the post dir check is performed.

Diff:
---
 winsup/cygwin/fhandler_disk_file.cc | 20 --------------------
 winsup/cygwin/syscalls.cc           | 28 ++++++++++++++++++++++++++++
 2 files changed, 28 insertions(+), 20 deletions(-)

diff --git a/winsup/cygwin/fhandler_disk_file.cc b/winsup/cygwin/fhandler_disk_file.cc
index 885b59161..07f9c513a 100644
--- a/winsup/cygwin/fhandler_disk_file.cc
+++ b/winsup/cygwin/fhandler_disk_file.cc
@@ -1852,26 +1852,6 @@ fhandler_disk_file::rmdir ()
 
   NTSTATUS status = unlink_nt (pc);
 
-  /* Check for existence of remote dirs after trying to delete them.
-     Two reasons:
-     - Sometimes SMB indicates failure when it really succeeds.
-     - Removing a directory on a Samba drive using an old Samba version
-       sometimes doesn't return an error, if the directory can't be removed
-       because it's not empty. */
-  if (isremote ())
-    {
-      OBJECT_ATTRIBUTES attr;
-      FILE_BASIC_INFORMATION fbi;
-      NTSTATUS q_status;
-
-      q_status = NtQueryAttributesFile (pc.get_object_attr (attr, sec_none_nih),
-					&fbi);
-      if (!NT_SUCCESS (status) && q_status == STATUS_OBJECT_NAME_NOT_FOUND)
-	status = STATUS_SUCCESS;
-      else if (pc.fs_is_samba ()
-	       && NT_SUCCESS (status) && NT_SUCCESS (q_status))
-	status = STATUS_DIRECTORY_NOT_EMPTY;
-    }
   if (!NT_SUCCESS (status))
     {
       __seterrno_from_nt_status (status);
diff --git a/winsup/cygwin/syscalls.cc b/winsup/cygwin/syscalls.cc
index 4742c6653..7044ea903 100644
--- a/winsup/cygwin/syscalls.cc
+++ b/winsup/cygwin/syscalls.cc
@@ -670,6 +670,30 @@ check_dir_not_empty (HANDLE dir, path_conv &pc)
   return STATUS_SUCCESS;
 }
 
+static inline NTSTATUS
+_unlink_nt_post_dir_check (NTSTATUS status, POBJECT_ATTRIBUTES attr, const path_conv &pc)
+{
+  /* Check for existence of remote dirs after trying to delete them.
+     Two reasons:
+     - Sometimes SMB indicates failure when it really succeeds.
+     - Removing a directory on a Samba drive using an old Samba version
+       sometimes doesn't return an error, if the directory can't be removed
+       because it's not empty. */
+  if (pc.isremote ())
+    {
+      FILE_BASIC_INFORMATION fbi;
+      NTSTATUS q_status;
+
+      q_status = NtQueryAttributesFile (attr, &fbi);
+      if (!NT_SUCCESS (status) && q_status == STATUS_OBJECT_NAME_NOT_FOUND)
+          status = STATUS_SUCCESS;
+      else if (pc.fs_is_samba ()
+               && NT_SUCCESS (status) && NT_SUCCESS (q_status))
+          status = STATUS_DIRECTORY_NOT_EMPTY;
+    }
+  return status;
+}
+
 static NTSTATUS
 _unlink_nt (path_conv &pc, bool shareable)
 {
@@ -1059,6 +1083,10 @@ out:
   /* Stop transaction if we started one. */
   if (trans)
     stop_transaction (status, old_trans, trans);
+
+  if (pc.isdir ())
+    status = _unlink_nt_post_dir_check (status, &attr, pc);
+
   syscall_printf ("%S, return status = %y", pc.get_nt_native_path (), status);
   return status;
 }