Line data    Source code

       1             : /* 
       2             :    Unix SMB/CIFS implementation.
       3             : 
       4             :    POSIX NTVFS backend - seek
       5             : 
       6             :    Copyright (C) Andrew Tridgell 2004
       7             : 
       8             :    This program is free software; you can redistribute it and/or modify
       9             :    it under the terms of the GNU General Public License as published by
      10             :    the Free Software Foundation; either version 3 of the License, or
      11             :    (at your option) any later version.
      12             :    
      13             :    This program is distributed in the hope that it will be useful,
      14             :    but WITHOUT ANY WARRANTY; without even the implied warranty of
      15             :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      16             :    GNU General Public License for more details.
      17             :    
      18             :    You should have received a copy of the GNU General Public License
      19             :    along with this program.  If not, see <http://www.gnu.org/licenses/>.
      20             : */
      21             : 
      22             : #include "includes.h"
      23             : #include "vfs_posix.h"
      24             : 
      25             : /*
      26             :   seek in a file
      27             : */
      28          13 : NTSTATUS pvfs_seek(struct ntvfs_module_context *ntvfs,
      29             :                    struct ntvfs_request *req,
      30             :                    union smb_seek *io)
      31             : {
      32          13 :         struct pvfs_state *pvfs = talloc_get_type(ntvfs->private_data,
      33             :                                   struct pvfs_state);
      34             :         struct pvfs_file *f;
      35             :         struct pvfs_file_handle *h;
      36             :         NTSTATUS status;
      37             : 
      38          13 :         f = pvfs_find_fd(pvfs, req, io->lseek.in.file.ntvfs);
      39          13 :         if (!f) {
      40           0 :                 return NT_STATUS_INVALID_HANDLE;
      41             :         }
      42          13 :         h = f->handle;
      43             : 
      44          13 :         status = NT_STATUS_OK;
      45             : 
      46          13 :         switch (io->lseek.in.mode) {
      47           2 :         case SEEK_MODE_START:
      48           2 :                 h->seek_offset = io->lseek.in.offset;
      49           2 :                 break;
      50             : 
      51           6 :         case SEEK_MODE_CURRENT:
      52           6 :                 h->seek_offset += io->lseek.in.offset;
      53           6 :                 break;
      54             : 
      55           3 :         case SEEK_MODE_END:
      56           3 :                 status = pvfs_resolve_name_fd(pvfs, h->fd, h->name, PVFS_RESOLVE_NO_OPENDB);
      57           3 :                 h->seek_offset = h->name->st.st_size + io->lseek.in.offset;
      58           3 :                 break;
      59             :         }
      60             : 
      61          13 :         io->lseek.out.offset = h->seek_offset;
      62             : 
      63          13 :         return status;
      64             : }
      65             :