s3: smbd: Add get_posix_fsp() utility function. Not yet used.

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>

diff --git a/source3/smbd/trans2.c b/source3/smbd/trans2.c
index 62ace74246fb8393e81e754866d9796a24affbae..7ec95e897c3fae35beb011a29d48721f009d1fbc 100644 (file)
--- a/source3/smbd/trans2.c
+++ b/source3/smbd/trans2.c
@@ -99,6 +99,82 @@ NTSTATUS check_access_fsp(const struct files_struct *fsp,
        return NT_STATUS_OK;
 }
 
+#if defined(HAVE_POSIX_ACLS)
+/****************************************************************************
+ Utility function to open a fsp for a POSIX handle operation.
+****************************************************************************/
+
+static NTSTATUS get_posix_fsp(connection_struct *conn,
+                       struct smb_request *req,
+                       const struct smb_filename *smb_fname,
+                       uint32_t access_mask,
+                       files_struct **ret_fsp)
+{
+       NTSTATUS status;
+       struct smb_filename *smb_fname_tmp = NULL;
+       uint32_t create_disposition = FILE_OPEN;
+       uint32_t share_access = FILE_SHARE_READ|
+                               FILE_SHARE_WRITE|
+                               FILE_SHARE_DELETE;
+       /*
+        * Only FILE_FLAG_POSIX_SEMANTICS matters on existing files,
+        * but set reasonable defaults.
+        */
+       uint32_t file_attributes = 0664|FILE_FLAG_POSIX_SEMANTICS;
+       uint32_t oplock = NO_OPLOCK;
+       uint32_t create_options = FILE_NON_DIRECTORY_FILE;
+
+       /* File or directory must exist. */
+       if (!VALID_STAT(smb_fname->st)) {
+               return NT_STATUS_OBJECT_NAME_NOT_FOUND;
+       }
+       /* Cannot be a symlink. */
+       if (S_ISLNK(smb_fname->st.st_ex_mode)) {
+               return NT_STATUS_ACCESS_DENIED;
+       }
+       /* Set options correctly for directory open. */
+       if (S_ISDIR(smb_fname->st.st_ex_mode)) {
+               /*
+                * Only FILE_FLAG_POSIX_SEMANTICS matters on existing
+                * directories, but set reasonable defaults.
+                */
+               file_attributes = 0775|FILE_FLAG_POSIX_SEMANTICS;
+               create_options = FILE_DIRECTORY_FILE;
+       }
+
+       /* Createfile uses a non-const smb_fname. */
+       smb_fname_tmp = cp_smb_filename(talloc_tos(),
+                                       smb_fname);
+       if (smb_fname_tmp == NULL) {
+               return NT_STATUS_NO_MEMORY;
+       }
+
+       status = SMB_VFS_CREATE_FILE(
+               conn,           /* conn */
+               req,            /* req */
+               0,              /* root_dir_fid */
+               smb_fname_tmp,  /* fname */
+               access_mask,    /* access_mask */
+               share_access,   /* share_access */
+               create_disposition,/* create_disposition*/
+               create_options, /* create_options */
+               file_attributes,/* file_attributes */
+               oplock,         /* oplock_request */
+               NULL,           /* lease */
+               0,              /* allocation_size */
+               0,              /* private_flags */
+               NULL,           /* sd */
+               NULL,           /* ea_list */
+               ret_fsp,        /* result */
+               NULL,           /* pinfo */
+               NULL,           /* in_context */
+               NULL);          /* out_context */
+
+       TALLOC_FREE(smb_fname_tmp);
+       return status;
+}
+#endif
+
 /********************************************************************
  The canonical "check access" based on object handle or path function.
 ********************************************************************/