source: trunk/server/source3/modules/vfs_fake_perms.c

/* 
 * Fake Perms VFS module.  Implements passthrough operation of all VFS
 * calls to disk functions, except for file permissions, which are now
 * mode 0700 for the current uid/gid.
 *
 * Copyright (C) Tim Potter, 1999-2000
 * Copyright (C) Alexander Bokovoy, 2002
 * Copyright (C) Andrew Bartlett, 2002
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *  
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *  
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

#include "includes.h"
#include "smbd/smbd.h"
#include "system/filesys.h"
#include "auth.h"

#undef DBGC_CLASS
#define DBGC_CLASS DBGC_VFS

extern struct current_user current_user;

static int fake_perms_stat(vfs_handle_struct *handle,
                           struct smb_filename *smb_fname)
{
        int ret = -1;

        ret = SMB_VFS_NEXT_STAT(handle, smb_fname);
        if (ret == 0) {
                if (S_ISDIR(smb_fname->st.st_ex_mode)) {
                        smb_fname->st.st_ex_mode = S_IFDIR | S_IRWXU;
                } else {
                        smb_fname->st.st_ex_mode = S_IRWXU;
                }
                if (handle->conn->session_info != NULL) {
                        smb_fname->st.st_ex_uid =
                                handle->conn->session_info->utok.uid;
                        smb_fname->st.st_ex_gid =
                                handle->conn->session_info->utok.gid;
                } else {
                        /*
                         * Sucks, but current_user is the best we can do here.
                         */
                        smb_fname->st.st_ex_uid = current_user.ut.uid;
                        smb_fname->st.st_ex_gid = current_user.ut.gid;
                }
        }

        return ret;
}

static int fake_perms_fstat(vfs_handle_struct *handle, files_struct *fsp, SMB_STRUCT_STAT *sbuf)
{
        int ret = -1;

        ret = SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
        if (ret == 0) {
                if (S_ISDIR(sbuf->st_ex_mode)) {
                        sbuf->st_ex_mode = S_IFDIR | S_IRWXU;
                } else {
                        sbuf->st_ex_mode = S_IRWXU;
                }
                if (handle->conn->session_info != NULL) {
                        sbuf->st_ex_uid =
                                handle->conn->session_info->utok.uid;
                        sbuf->st_ex_gid =
                                handle->conn->session_info->utok.gid;
                } else {
                        /*
                         * Sucks, but current_user is the best we can do here.
                         */
                        sbuf->st_ex_uid = current_user.ut.uid;
                        sbuf->st_ex_gid = current_user.ut.gid;
                }
        }
        return ret;
}

static struct vfs_fn_pointers vfs_fake_perms_fns = {
        .stat = fake_perms_stat,
        .fstat = fake_perms_fstat
};

NTSTATUS vfs_fake_perms_init(void);
NTSTATUS vfs_fake_perms_init(void)
{
        return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "fake_perms",
                                &vfs_fake_perms_fns);
}