source/modules/vfs_fake_perms.c

   1 /*
   2  * Fake Perms VFS module.  Implements passthrough operation of all VFS
   3  * calls to disk functions, except for file permissions, which are now
   4  * mode 0700 for the current uid/gid.
   5  *
   6  * Copyright (C) Tim Potter, 1999-2000
   7  * Copyright (C) Alexander Bokovoy, 2002
   8  * Copyright (C) Andrew Bartlett, 2002
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 3 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23  */
  24
  25 #include "includes.h"
  26
  27 extern struct current_user current_user;
  28
  29 #undef DBGC_CLASS
  30 #define DBGC_CLASS DBGC_VFS
  31
  32 static int fake_perms_stat(vfs_handle_struct *handle, const char *fname, SMB_STRUCT_STAT *sbuf)
  33 {
  34         int ret = -1;
  35
  36         ret = SMB_VFS_NEXT_STAT(handle, fname, sbuf);
  37         if (ret == 0) {
  38                 if (S_ISDIR(sbuf->st_mode)) {
  39                         sbuf->st_mode = S_IFDIR | S_IRWXU;
  40                 } else {
  41                         sbuf->st_mode = S_IRWXU;
  42                 }
  43                 sbuf->st_uid = current_user.ut.uid;
  44                 sbuf->st_gid = current_user.ut.gid;
  45         }
  46
  47         return ret;
  48 }
  49
  50 static int fake_perms_fstat(vfs_handle_struct *handle, files_struct *fsp, int fd, SMB_STRUCT_STAT *sbuf)
  51 {
  52         int ret = -1;
  53
  54         ret = SMB_VFS_NEXT_FSTAT(handle, fsp, fd, sbuf);
  55         if (ret == 0) {
  56                 if (S_ISDIR(sbuf->st_mode)) {
  57                         sbuf->st_mode = S_IFDIR | S_IRWXU;
  58                 } else {
  59                         sbuf->st_mode = S_IRWXU;
  60                 }
  61                 sbuf->st_uid = current_user.ut.uid;
  62                 sbuf->st_gid = current_user.ut.gid;
  63         }
  64         return ret;
  65 }
  66
  67 /* VFS operations structure */
  68
  69 static vfs_op_tuple fake_perms_ops[] = {
  70         {SMB_VFS_OP(fake_perms_stat),   SMB_VFS_OP_STAT,        SMB_VFS_LAYER_TRANSPARENT},
  71         {SMB_VFS_OP(fake_perms_fstat),  SMB_VFS_OP_FSTAT,       SMB_VFS_LAYER_TRANSPARENT},
  72
  73         {SMB_VFS_OP(NULL),              SMB_VFS_OP_NOOP,        SMB_VFS_LAYER_NOOP}
  74 };
  75
  76 NTSTATUS vfs_fake_perms_init(void);
  77 NTSTATUS vfs_fake_perms_init(void)
  78 {
  79         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "fake_perms", fake_perms_ops);
  80 }