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/*
* 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 2 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, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "config.h"
#include <stdio.h>
#include <sys/stat.h>
#ifdef HAVE_UTIME_H
#include <utime.h>
#endif
#ifdef HAVE_DIRENT_H
#include <dirent.h>
#endif
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#include <errno.h>
#include <string.h>
#include <includes.h>
#include <vfs.h>
static struct vfs_ops default_vfs_ops; /* For passthrough operation */
static struct smb_vfs_handle_struct *fake_perms_handle; /* use fake_perms_handle->data for storing per-instance private data */
static int fake_perms_stat(struct connection_struct *conn, const char *fname, SMB_STRUCT_STAT *sbuf)
{
int ret = default_vfs_ops.stat(conn, fname, sbuf);
if (ret == 0) {
extern struct current_user current_user;
if (S_ISDIR(sbuf->st_mode)) {
sbuf->st_mode = S_IFDIR | S_IRWXU;
} else {
sbuf->st_mode = S_IRWXU;
}
sbuf->st_uid = current_user.uid;
sbuf->st_gid = current_user.gid;
}
return ret;
}
static int fake_perms_fstat(struct files_struct *fsp, int fd, SMB_STRUCT_STAT *sbuf)
{
int ret = default_vfs_ops.fstat(fsp, fd, sbuf);
if (ret == 0) {
extern struct current_user current_user;
if (S_ISDIR(sbuf->st_mode)) {
sbuf->st_mode = S_IFDIR | S_IRWXU;
} else {
sbuf->st_mode = S_IRWXU;
}
sbuf->st_uid = current_user.uid;
sbuf->st_gid = current_user.gid;
}
return ret;
}
#if 0
static size_t fake_perms_fget_nt_acl(struct files_struct *fsp, int fd, struct security_descriptor_info **ppdesc)
{
return default_vfs_ops.fget_nt_acl(fsp, fd, ppdesc);
}
static size_t fake_perms_get_nt_acl(struct files_struct *fsp, const char *name, struct security_descriptor_info **ppdesc)
{
return default_vfs_ops.get_nt_acl(fsp, name, ppdesc);
}
static BOOL fake_perms_fset_nt_acl(struct files_struct *fsp, int fd, uint32 security_info_sent, struct security_descriptor_info *psd)
{
return default_vfs_ops.fset_nt_acl(fsp, fd, security_info_sent, psd);
}
static BOOL fake_perms_set_nt_acl(struct files_struct *fsp, const char *name, uint32 security_info_sent, struct security_descriptor_info *psd)
{
return default_vfs_ops.set_nt_acl(fsp, name, security_info_sent, psd);
}
static BOOL fake_perms_chmod_acl(struct connection_struct *conn, const char *name, mode_t mode)
{
return default_vfs_ops.chmod_acl(conn, name, mode);
}
static BOOL fake_perms_fchmod_acl(struct files_struct *fsp, int fd, mode_t mode)
{
return default_vfs_ops.fchmod_acl(fsp, fd, mode);
}
static int fake_perms_sys_acl_get_entry(struct connection_struct *conn, SMB_ACL_T theacl, int entry_id, SMB_ACL_ENTRY_T *entry_p)
{
return default_vfs_ops.sys_acl_get_entry(conn, theacl, entry_id, entry_p);
}
static int fake_perms_sys_acl_get_tag_type(struct connection_struct *conn, SMB_ACL_ENTRY_T entry_d, SMB_ACL_TAG_T *tag_type_p)
{
return default_vfs_ops.sys_acl_get_tag_type(conn, entry_d, tag_type_p);
}
static int fake_perms_sys_acl_get_permset(struct connection_struct *conn, SMB_ACL_ENTRY_T entry_d, SMB_ACL_PERMSET_T *permset_p)
{
return default_vfs_ops.sys_acl_get_permset(conn, entry_d, permset_p);
}
static void *fake_perms_sys_acl_get_qualifier(struct connection_struct *conn, SMB_ACL_ENTRY_T entry_d)
{
return default_vfs_ops.sys_acl_get_qualifier(conn, entry_d);
}
static SMB_ACL_T fake_perms_sys_acl_get_file(struct connection_struct *conn, const char *path_p, SMB_ACL_TYPE_T type)
{
return default_vfs_ops.sys_acl_get_file(conn, path_p, type);
}
static SMB_ACL_T fake_perms_sys_acl_get_fd(struct files_struct *fsp, int fd)
{
return default_vfs_ops.sys_acl_get_fd(fsp, fd);
}
static int fake_perms_sys_acl_clear_perms(struct connection_struct *conn, SMB_ACL_PERMSET_T permset)
{
return default_vfs_ops.sys_acl_clear_perms(conn, permset);
}
static int fake_perms_sys_acl_add_perm(struct connection_struct *conn, SMB_ACL_PERMSET_T permset, SMB_ACL_PERM_T perm)
{
return default_vfs_ops.sys_acl_add_perm(conn, permset, perm);
}
static char *fake_perms_sys_acl_to_text(struct connection_struct *conn, SMB_ACL_T theacl, ssize_t *plen)
{
return default_vfs_ops.sys_acl_to_text(conn, theacl, plen);
}
static SMB_ACL_T fake_perms_sys_acl_init(struct connection_struct *conn, int count)
{
return default_vfs_ops.sys_acl_init(conn, count);
}
static int fake_perms_sys_acl_create_entry(struct connection_struct *conn, SMB_ACL_T *pacl, SMB_ACL_ENTRY_T *pentry)
{
return default_vfs_ops.sys_acl_create_entry(conn, pacl, pentry);
}
static int fake_perms_sys_acl_set_tag_type(struct connection_struct *conn, SMB_ACL_ENTRY_T entry, SMB_ACL_TAG_T tagtype)
{
return default_vfs_ops.sys_acl_set_tag_type(conn, entry, tagtype);
}
static int fake_perms_sys_acl_set_qualifier(struct connection_struct *conn, SMB_ACL_ENTRY_T entry, void *qual)
{
return default_vfs_ops.sys_acl_set_qualifier(conn, entry, qual);
}
static int fake_perms_sys_acl_set_permset(struct connection_struct *conn, SMB_ACL_ENTRY_T entry, SMB_ACL_PERMSET_T permset)
{
return default_vfs_ops.sys_acl_set_permset(conn, entry, permset);
}
static int fake_perms_sys_acl_valid(struct connection_struct *conn, SMB_ACL_T theacl )
{
return default_vfs_ops.sys_acl_valid(conn, theacl );
}
static int fake_perms_sys_acl_set_file(struct connection_struct *conn, const char *name, SMB_ACL_TYPE_T acltype, SMB_ACL_T theacl)
{
return default_vfs_ops.sys_acl_set_file(conn, name, acltype, theacl);
}
static int fake_perms_sys_acl_set_fd(struct files_struct *fsp, int fd, SMB_ACL_T theacl)
{
return default_vfs_ops.sys_acl_set_fd(fsp, fd, theacl);
}
static int fake_perms_sys_acl_delete_def_file(struct connection_struct *conn, const char *path)
{
return default_vfs_ops.sys_acl_delete_def_file(conn, path);
}
static int fake_perms_sys_acl_get_perm(struct connection_struct *conn, SMB_ACL_PERMSET_T permset, SMB_ACL_PERM_T perm)
{
return default_vfs_ops.sys_acl_get_perm(conn, permset, perm);
}
static int fake_perms_sys_acl_free_text(struct connection_struct *conn, char *text)
{
return default_vfs_ops.sys_acl_free_text(conn, text);
}
static int fake_perms_sys_acl_free_acl(struct connection_struct *conn, SMB_ACL_T posix_acl)
{
return default_vfs_ops.sys_acl_free_acl(conn, posix_acl);
}
static int fake_perms_sys_acl_free_qualifier(struct connection_struct *conn, void *qualifier, SMB_ACL_TAG_T tagtype)
{
return default_vfs_ops.sys_acl_free_qualifier(conn, qualifier, tagtype);
}
#endif
/* VFS operations structure */
static vfs_op_tuple fake_perms_ops[] = {
/* NT File ACL operations */
#if 0
{fake_perms_fget_nt_acl, SMB_VFS_OP_FGET_NT_ACL, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_get_nt_acl, SMB_VFS_OP_GET_NT_ACL, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_fset_nt_acl, SMB_VFS_OP_FSET_NT_ACL, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_set_nt_acl, SMB_VFS_OP_SET_NT_ACL, SMB_VFS_LAYER_TRANSPARENT},
/* POSIX ACL operations */
{fake_perms_chmod_acl, SMB_VFS_OP_CHMOD_ACL, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_fchmod_acl, SMB_VFS_OP_FCHMOD_ACL, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_get_entry, SMB_VFS_OP_SYS_ACL_GET_ENTRY, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_get_tag_type, SMB_VFS_OP_SYS_ACL_GET_TAG_TYPE, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_get_permset, SMB_VFS_OP_SYS_ACL_GET_PERMSET, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_get_qualifier, SMB_VFS_OP_SYS_ACL_GET_QUALIFIER, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_get_file, SMB_VFS_OP_SYS_ACL_GET_FILE, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_get_fd, SMB_VFS_OP_SYS_ACL_GET_FD, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_clear_perms, SMB_VFS_OP_SYS_ACL_CLEAR_PERMS, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_add_perm, SMB_VFS_OP_SYS_ACL_ADD_PERM, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_to_text, SMB_VFS_OP_SYS_ACL_TO_TEXT, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_init, SMB_VFS_OP_SYS_ACL_INIT, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_create_entry, SMB_VFS_OP_SYS_ACL_CREATE_ENTRY, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_set_tag_type, SMB_VFS_OP_SYS_ACL_SET_TAG_TYPE, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_set_qualifier, SMB_VFS_OP_SYS_ACL_SET_QUALIFIER, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_set_permset, SMB_VFS_OP_SYS_ACL_SET_PERMSET, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_valid, SMB_VFS_OP_SYS_ACL_VALID, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_set_file, SMB_VFS_OP_SYS_ACL_SET_FILE, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_set_fd, SMB_VFS_OP_SYS_ACL_SET_FD, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_delete_def_file, SMB_VFS_OP_SYS_ACL_DELETE_DEF_FILE, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_get_perm, SMB_VFS_OP_SYS_ACL_GET_PERM, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_free_text, SMB_VFS_OP_SYS_ACL_FREE_TEXT, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_free_acl, SMB_VFS_OP_SYS_ACL_FREE_ACL, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_sys_acl_free_qualifier, SMB_VFS_OP_SYS_ACL_FREE_QUALIFIER, SMB_VFS_LAYER_TRANSPARENT},
#endif
{fake_perms_stat, SMB_VFS_OP_STAT, SMB_VFS_LAYER_TRANSPARENT},
{fake_perms_fstat, SMB_VFS_OP_FSTAT, SMB_VFS_LAYER_TRANSPARENT},
{NULL, SMB_VFS_OP_NOOP, SMB_VFS_LAYER_NOOP}
};
/* VFS initialisation - return initialized vfs_op_tuple array back to Samba */
static vfs_op_tuple *fake_perms_init(const struct vfs_ops *def_vfs_ops,
struct smb_vfs_handle_struct *vfs_handle)
{
DEBUG(3, ("Initialising default vfs hooks\n"));
memcpy(&default_vfs_ops, def_vfs_ops, sizeof(struct vfs_ops));
/* Remember vfs_handle for further allocation and referencing of private
information in vfs_handle->data
*/
fake_perms_handle = vfs_handle;
return fake_perms_ops;
}
NTSTATUS vfs_fake_perms_init(void)
{
return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "fake_perms", fake_perms_init);
}
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