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, see <http://www.gnu.org/licenses/>.
  22  */
  23
  24 #include "includes.h"
  25
  26 extern struct current_user current_user;
  27
  28 #undef DBGC_CLASS
  29 #define DBGC_CLASS DBGC_VFS
  30
  31 static int fake_perms_stat(vfs_handle_struct *handle, const char *fname, SMB_STRUCT_STAT *sbuf)
  32 {
  33         int ret = -1;
  34
  35         ret = SMB_VFS_NEXT_STAT(handle, fname, sbuf);
  36         if (ret == 0) {
  37                 if (S_ISDIR(sbuf->st_mode)) {
  38                         sbuf->st_mode = S_IFDIR | S_IRWXU;
  39                 } else {
  40                         sbuf->st_mode = S_IRWXU;
  41                 }
  42                 sbuf->st_uid = current_user.ut.uid;
  43                 sbuf->st_gid = current_user.ut.gid;
  44         }
  45
  46         return ret;
  47 }
  48
  49 static int fake_perms_fstat(vfs_handle_struct *handle, files_struct *fsp, SMB_STRUCT_STAT *sbuf)
  50 {
  51         int ret = -1;
  52
  53         ret = SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
  54         if (ret == 0) {
  55                 if (S_ISDIR(sbuf->st_mode)) {
  56                         sbuf->st_mode = S_IFDIR | S_IRWXU;
  57                 } else {
  58                         sbuf->st_mode = S_IRWXU;
  59                 }
  60                 sbuf->st_uid = current_user.ut.uid;
  61                 sbuf->st_gid = current_user.ut.gid;
  62         }
  63         return ret;
  64 }
  65
  66 /* VFS operations structure */
  67
  68 static vfs_op_tuple fake_perms_ops[] = {
  69         {SMB_VFS_OP(fake_perms_stat),   SMB_VFS_OP_STAT,        SMB_VFS_LAYER_TRANSPARENT},
  70         {SMB_VFS_OP(fake_perms_fstat),  SMB_VFS_OP_FSTAT,       SMB_VFS_LAYER_TRANSPARENT},
  71
  72         {SMB_VFS_OP(NULL),              SMB_VFS_OP_NOOP,        SMB_VFS_LAYER_NOOP}
  73 };
  74
  75 NTSTATUS vfs_fake_perms_init(void);
  76 NTSTATUS vfs_fake_perms_init(void)
  77 {
  78         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "fake_perms", fake_perms_ops);
  79 }