コード例 #1
0
ファイル: udfunc.cpp プロジェクト: JWepi/BlueRayManager
void	get_file_infos(udf_t *p_udf, udf_dirent_t *p_udf_dirent, const char *path, const char *file)
{
	while (udf_readdir(p_udf_dirent))
	{
		const char *dirname = udf_get_filename(p_udf_dirent);
		if (udf_is_dir(p_udf_dirent))
		{
			udf_dirent_t *p_udf_dirent2 = udf_opendir(p_udf_dirent);
			if (p_udf_dirent2)
			{
				const unsigned int i_newlen=2 + strlen(path) + strlen(dirname);
				char *newpath = (char *)calloc(1, sizeof(char)*i_newlen);

				snprintf(newpath, i_newlen, "%s%s/", path, dirname);
				get_file_infos(p_udf, p_udf_dirent2, newpath, file);
				free(newpath);
			}
		}
		else if (strcmp(dirname, file) == 0)
		{
			const unsigned int i_newlen=2 + strlen(path) + strlen(dirname);
			char *newpath = (char *)calloc(1, sizeof(char)*i_newlen);

			snprintf(newpath, i_newlen, "%s%s", path, dirname);
			print_file_info(p_udf_dirent, newpath);
		}
	}
}
コード例 #2
0
ファイル: print_files.c プロジェクト: Na0na0/ft_ls
void			print_files(char **paths, int flags)
{
	t_stat		attrib;
	t_file		*file;
	t_padding	paddings;
	t_btree		*list;

	init_paddings(&paddings);
	list = NULL;
	while (*paths != NULL)
	{
		if (lstat(*paths, &attrib) != -1)
		{
			if (!S_ISDIR(attrib.st_mode) || flags & DIR_FILE)
			{
				file = get_file_infos(*paths, &paddings, flags);
				btree_add(&list, file, flags & TIME ? &timecmp : &namecmp);
				flags |= THERE_FILE;
			}
			else
				flags |= THERE_DIR;
		}
		paths++;
	}
	print_content(list, flags, paddings);
	if (flags & THERE_DIR && flags & THERE_FILE)
		ft_putchar('\n');
}
コード例 #3
0
ファイル: smb2_getinfo.c プロジェクト: rchicoli/samba
static struct tevent_req *smbd_smb2_getinfo_send(TALLOC_CTX *mem_ctx,
						 struct tevent_context *ev,
						 struct smbd_smb2_request *smb2req,
						 struct files_struct *fsp,
						 uint8_t in_info_type,
						 uint8_t in_file_info_class,
						 uint32_t in_output_buffer_length,
						 DATA_BLOB in_input_buffer,
						 uint32_t in_additional_information,
						 uint32_t in_flags)
{
	struct tevent_req *req;
	struct smbd_smb2_getinfo_state *state;
	struct smb_request *smbreq;
	connection_struct *conn = smb2req->tcon->compat;
	NTSTATUS status;

	req = tevent_req_create(mem_ctx, &state,
				struct smbd_smb2_getinfo_state);
	if (req == NULL) {
		return NULL;
	}
	state->smb2req = smb2req;
	state->status = NT_STATUS_OK;
	state->out_output_buffer = data_blob_null;

	DEBUG(10,("smbd_smb2_getinfo_send: %s - %s\n",
		  fsp_str_dbg(fsp), fsp_fnum_dbg(fsp)));

	smbreq = smbd_smb2_fake_smb_request(smb2req);
	if (tevent_req_nomem(smbreq, req)) {
		return tevent_req_post(req, ev);
	}

	if (IS_IPC(conn)) {
		smb2_ipc_getinfo(req, state, ev,
			in_info_type, in_file_info_class);
		return tevent_req_post(req, ev);
	}

	switch (in_info_type) {
	case SMB2_GETINFO_FILE:
	{
		uint16_t file_info_level;
		char *data = NULL;
		unsigned int data_size = 0;
		bool delete_pending = false;
		struct timespec write_time_ts;
		struct file_id fileid;
		struct ea_list *ea_list = NULL;
		int lock_data_count = 0;
		char *lock_data = NULL;
		size_t fixed_portion;

		ZERO_STRUCT(write_time_ts);

		switch (in_file_info_class) {
		case 0x0F:/* RAW_FILEINFO_SMB2_ALL_EAS */
			file_info_level = 0xFF00 | in_file_info_class;
			break;

		case 0x12:/* RAW_FILEINFO_SMB2_ALL_INFORMATION */
			file_info_level = 0xFF00 | in_file_info_class;
			break;

		default:
			/* the levels directly map to the passthru levels */
			file_info_level = in_file_info_class + 1000;
			break;
		}

		if (fsp->fake_file_handle) {
			/*
			 * This is actually for the QUOTA_FAKE_FILE --metze
			 */

			/* We know this name is ok, it's already passed the checks. */

		} else if (fsp->fh->fd == -1) {
			/*
			 * This is actually a QFILEINFO on a directory
			 * handle (returned from an NT SMB). NT5.0 seems
			 * to do this call. JRA.
			 */

			if (INFO_LEVEL_IS_UNIX(file_info_level)) {
				/* Always do lstat for UNIX calls. */
				if (SMB_VFS_LSTAT(conn, fsp->fsp_name)) {
					DEBUG(3,("smbd_smb2_getinfo_send: "
						 "SMB_VFS_LSTAT of %s failed "
						 "(%s)\n", fsp_str_dbg(fsp),
						 strerror(errno)));
					status = map_nt_error_from_unix(errno);
					tevent_req_nterror(req, status);
					return tevent_req_post(req, ev);
				}
			} else if (SMB_VFS_STAT(conn, fsp->fsp_name)) {
				DEBUG(3,("smbd_smb2_getinfo_send: "
					 "SMB_VFS_STAT of %s failed (%s)\n",
					 fsp_str_dbg(fsp),
					 strerror(errno)));
				status = map_nt_error_from_unix(errno);
				tevent_req_nterror(req, status);
				return tevent_req_post(req, ev);
			}

			fileid = vfs_file_id_from_sbuf(conn,
						       &fsp->fsp_name->st);
			get_file_infos(fileid, fsp->name_hash,
				&delete_pending, &write_time_ts);
		} else {
			/*
			 * Original code - this is an open file.
			 */

			if (SMB_VFS_FSTAT(fsp, &fsp->fsp_name->st) != 0) {
				DEBUG(3, ("smbd_smb2_getinfo_send: "
					  "fstat of %s failed (%s)\n",
					  fsp_fnum_dbg(fsp), strerror(errno)));
				status = map_nt_error_from_unix(errno);
				tevent_req_nterror(req, status);
				return tevent_req_post(req, ev);
			}
			fileid = vfs_file_id_from_sbuf(conn,
						       &fsp->fsp_name->st);
			get_file_infos(fileid, fsp->name_hash,
				&delete_pending, &write_time_ts);
		}

		status = smbd_do_qfilepathinfo(conn, state,
					       file_info_level,
					       fsp,
					       fsp->fsp_name,
					       delete_pending,
					       write_time_ts,
					       ea_list,
					       lock_data_count,
					       lock_data,
					       STR_UNICODE,
					       in_output_buffer_length,
					       &fixed_portion,
					       &data,
					       &data_size);
		if (!NT_STATUS_IS_OK(status)) {
			SAFE_FREE(data);
			if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_LEVEL)) {
				status = NT_STATUS_INVALID_INFO_CLASS;
			}
			tevent_req_nterror(req, status);
			return tevent_req_post(req, ev);
		}
		if (in_output_buffer_length < fixed_portion) {
			SAFE_FREE(data);
			tevent_req_nterror(
				req, NT_STATUS_INFO_LENGTH_MISMATCH);
			return tevent_req_post(req, ev);
		}
		if (data_size > 0) {
			state->out_output_buffer = data_blob_talloc(state,
								    data,
								    data_size);
			SAFE_FREE(data);
			if (tevent_req_nomem(state->out_output_buffer.data, req)) {
				return tevent_req_post(req, ev);
			}
			if (data_size > in_output_buffer_length) {
				state->out_output_buffer.length =
					in_output_buffer_length;
				status = STATUS_BUFFER_OVERFLOW;
			}
		}
		SAFE_FREE(data);
		break;
	}

	case SMB2_GETINFO_FS:
	{
		uint16_t file_info_level;
		char *data = NULL;
		int data_size = 0;
		size_t fixed_portion;

		/* the levels directly map to the passthru levels */
		file_info_level = in_file_info_class + 1000;

		status = smbd_do_qfsinfo(conn, state,
					 file_info_level,
					 STR_UNICODE,
					 in_output_buffer_length,
					 &fixed_portion,
					 fsp->fsp_name,
					 &data,
					 &data_size);
		/* some responses set STATUS_BUFFER_OVERFLOW and return
		   partial, but valid data */
		if (!(NT_STATUS_IS_OK(status) ||
		      NT_STATUS_EQUAL(status, STATUS_BUFFER_OVERFLOW))) {
			SAFE_FREE(data);
			if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_LEVEL)) {
				status = NT_STATUS_INVALID_INFO_CLASS;
			}
			tevent_req_nterror(req, status);
			return tevent_req_post(req, ev);
		}
		if (in_output_buffer_length < fixed_portion) {
			SAFE_FREE(data);
			tevent_req_nterror(
				req, NT_STATUS_INFO_LENGTH_MISMATCH);
			return tevent_req_post(req, ev);
		}
		if (data_size > 0) {
			state->out_output_buffer = data_blob_talloc(state,
								    data,
								    data_size);
			SAFE_FREE(data);
			if (tevent_req_nomem(state->out_output_buffer.data, req)) {
				return tevent_req_post(req, ev);
			}
			if (data_size > in_output_buffer_length) {
				state->out_output_buffer.length =
					in_output_buffer_length;
				status = STATUS_BUFFER_OVERFLOW;
			}
		}
		SAFE_FREE(data);
		break;
	}

	case SMB2_GETINFO_SECURITY:
	{
		uint8_t *p_marshalled_sd = NULL;
		size_t sd_size = 0;

		status = smbd_do_query_security_desc(conn,
				state,
				fsp,
				/* Security info wanted. */
				in_additional_information &
				SMB_SUPPORTED_SECINFO_FLAGS,
				in_output_buffer_length,
				&p_marshalled_sd,
				&sd_size);

		if (NT_STATUS_EQUAL(status, NT_STATUS_BUFFER_TOO_SMALL)) {
			/* Return needed size. */
			state->out_output_buffer = data_blob_talloc(state,
								    NULL,
								    4);
			if (tevent_req_nomem(state->out_output_buffer.data, req)) {
				return tevent_req_post(req, ev);
			}
			SIVAL(state->out_output_buffer.data,0,(uint32_t)sd_size);
			state->status = NT_STATUS_BUFFER_TOO_SMALL;
			break;
		}
		if (!NT_STATUS_IS_OK(status)) {
			DEBUG(10,("smbd_smb2_getinfo_send: "
				 "smbd_do_query_security_desc of %s failed "
				 "(%s)\n", fsp_str_dbg(fsp),
				 nt_errstr(status)));
			tevent_req_nterror(req, status);
			return tevent_req_post(req, ev);
		}

		if (sd_size > 0) {
			state->out_output_buffer = data_blob_talloc(state,
								    p_marshalled_sd,
								    sd_size);
			if (tevent_req_nomem(state->out_output_buffer.data, req)) {
				return tevent_req_post(req, ev);
			}
		}
		break;
	}

	case SMB2_GETINFO_QUOTA:
		tevent_req_nterror(req, NT_STATUS_NOT_SUPPORTED);
		return tevent_req_post(req, ev);

	default:
		DEBUG(10,("smbd_smb2_getinfo_send: "
			"unknown in_info_type of %u "
			" for file %s\n",
			(unsigned int)in_info_type,
			fsp_str_dbg(fsp) ));

		tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
		return tevent_req_post(req, ev);
	}

	state->status = status;
	tevent_req_done(req);
	return tevent_req_post(req, ev);
}
コード例 #4
0
ファイル: filename.c プロジェクト: srimalik/samba
NTSTATUS unix_convert(TALLOC_CTX *ctx,
		      connection_struct *conn,
		      const char *orig_path,
		      struct smb_filename **smb_fname_out,
		      uint32_t ucf_flags)
{
	struct smb_filename *smb_fname = NULL;
	char *start, *end;
	char *dirpath = NULL;
	char *stream = NULL;
	bool component_was_mangled = False;
	bool name_has_wildcard = False;
	bool posix_pathnames = false;
	bool allow_wcard_last_component =
	    (ucf_flags & UCF_ALWAYS_ALLOW_WCARD_LCOMP);
	bool save_last_component = ucf_flags & UCF_SAVE_LCOMP;
	NTSTATUS status;
	int ret = -1;

	*smb_fname_out = NULL;

	smb_fname = talloc_zero(ctx, struct smb_filename);
	if (smb_fname == NULL) {
		return NT_STATUS_NO_MEMORY;
	}

	if (conn->printer) {
		/* we don't ever use the filenames on a printer share as a
			filename - so don't convert them */
		if (!(smb_fname->base_name = talloc_strdup(smb_fname,
							   orig_path))) {
			status = NT_STATUS_NO_MEMORY;
			goto err;
		}
		goto done;
	}

	DEBUG(5, ("unix_convert called on file \"%s\"\n", orig_path));

	/*
	 * Conversion to basic unix format is already done in
	 * check_path_syntax().
	 */

	/*
	 * Names must be relative to the root of the service - any leading /.
	 * and trailing /'s should have been trimmed by check_path_syntax().
	 */

#ifdef DEVELOPER
	SMB_ASSERT(*orig_path != '/');
#endif

	/*
	 * If we trimmed down to a single '\0' character
	 * then we should use the "." directory to avoid
	 * searching the cache, but not if we are in a
	 * printing share.
	 * As we know this is valid we can return true here.
	 */

	if (!*orig_path) {
		if (!(smb_fname->base_name = talloc_strdup(smb_fname, "."))) {
			status = NT_STATUS_NO_MEMORY;
			goto err;
		}
		if (SMB_VFS_STAT(conn, smb_fname) != 0) {
			status = map_nt_error_from_unix(errno);
			goto err;
		}
		DEBUG(5, ("conversion finished \"\" -> %s\n",
			  smb_fname->base_name));
		goto done;
	}

	if (orig_path[0] == '.' && (orig_path[1] == '/' ||
				orig_path[1] == '\0')) {
		/* Start of pathname can't be "." only. */
		if (orig_path[1] == '\0' || orig_path[2] == '\0') {
			status = NT_STATUS_OBJECT_NAME_INVALID;
		} else {
			status =determine_path_error(&orig_path[2],
			    allow_wcard_last_component);
		}
		goto err;
	}

	/* Start with the full orig_path as given by the caller. */
	if (!(smb_fname->base_name = talloc_strdup(smb_fname, orig_path))) {
		DEBUG(0, ("talloc_strdup failed\n"));
		status = NT_STATUS_NO_MEMORY;
		goto err;
	}

	/*
	 * Large directory fix normalization. If we're case sensitive, and
	 * the case preserving parameters are set to "no", normalize the case of
	 * the incoming filename from the client WHETHER IT EXISTS OR NOT !
	 * This is in conflict with the current (3.0.20) man page, but is
	 * what people expect from the "large directory howto". I'll update
	 * the man page. Thanks to [email protected] for finding this. JRA.
	 */

	if (conn->case_sensitive && !conn->case_preserve &&
			!conn->short_case_preserve) {
		strnorm(smb_fname->base_name, lp_defaultcase(SNUM(conn)));
	}

	/*
	 * Ensure saved_last_component is valid even if file exists.
	 */

	if(save_last_component) {
		end = strrchr_m(smb_fname->base_name, '/');
		if (end) {
			smb_fname->original_lcomp = talloc_strdup(smb_fname,
								  end + 1);
		} else {
			smb_fname->original_lcomp =
			    talloc_strdup(smb_fname, smb_fname->base_name);
		}
		if (smb_fname->original_lcomp == NULL) {
			status = NT_STATUS_NO_MEMORY;
			goto err;
		}
	}

	posix_pathnames = (lp_posix_pathnames() ||
				(ucf_flags & UCF_POSIX_PATHNAMES));

	/*
	 * Strip off the stream, and add it back when we're done with the
	 * base_name.
	 */
	if (!posix_pathnames) {
		stream = strchr_m(smb_fname->base_name, ':');

		if (stream != NULL) {
			char *tmp = talloc_strdup(smb_fname, stream);
			if (tmp == NULL) {
				status = NT_STATUS_NO_MEMORY;
				goto err;
			}
			/*
			 * Since this is actually pointing into
			 * smb_fname->base_name this truncates base_name.
			 */
			*stream = '\0';
			stream = tmp;
		}
	}

	start = smb_fname->base_name;

	/*
	 * If we're providing case insensitive semantics or
	 * the underlying filesystem is case insensitive,
	 * then a case-normalized hit in the stat-cache is
	 * authoratitive. JRA.
	 *
	 * Note: We're only checking base_name.  The stream_name will be
	 * added and verified in build_stream_path().
	 */

	if((!conn->case_sensitive || !(conn->fs_capabilities &
				       FILE_CASE_SENSITIVE_SEARCH)) &&
	    stat_cache_lookup(conn, posix_pathnames, &smb_fname->base_name, &dirpath, &start,
			      &smb_fname->st)) {
		goto done;
	}

	/*
	 * Make sure "dirpath" is an allocated string, we use this for
	 * building the directories with talloc_asprintf and free it.
	 */

	if ((dirpath == NULL) && (!(dirpath = talloc_strdup(ctx,"")))) {
		DEBUG(0, ("talloc_strdup failed\n"));
		status = NT_STATUS_NO_MEMORY;
		goto err;
	}

	/*
	 * If we have a wildcard we must walk the path to
	 * find where the error is, even if case sensitive
	 * is true.
	 */

	name_has_wildcard = ms_has_wild(smb_fname->base_name);
	if (name_has_wildcard && !allow_wcard_last_component) {
		/* Wildcard not valid anywhere. */
		status = NT_STATUS_OBJECT_NAME_INVALID;
		goto fail;
	}

	DEBUG(5,("unix_convert begin: name = %s, dirpath = %s, start = %s\n",
		 smb_fname->base_name, dirpath, start));

	if (!name_has_wildcard) {
		/*
		 * stat the name - if it exists then we can add the stream back (if
		 * there was one) and be done!
		 */

		if (posix_pathnames) {
			ret = SMB_VFS_LSTAT(conn, smb_fname);
		} else {
			ret = SMB_VFS_STAT(conn, smb_fname);
		}

		if (ret == 0) {
			status = check_for_dot_component(smb_fname);
			if (!NT_STATUS_IS_OK(status)) {
				goto fail;
			}
			/* Add the path (not including the stream) to the cache. */
			stat_cache_add(orig_path, smb_fname->base_name,
				       conn->case_sensitive);
			DEBUG(5,("conversion of base_name finished %s -> %s\n",
				 orig_path, smb_fname->base_name));
			goto done;
		}

		/* Stat failed - ensure we don't use it. */
		SET_STAT_INVALID(smb_fname->st);

		if (errno == ENOENT) {
			/* Optimization when creating a new file - only
			   the last component doesn't exist. */
			status = check_parent_exists(ctx,
						conn,
						posix_pathnames,
						smb_fname,
						&dirpath,
						&start);
			if (!NT_STATUS_IS_OK(status)) {
				goto fail;
			}
		}

		/*
		 * A special case - if we don't have any wildcards or mangling chars and are case
		 * sensitive or the underlying filesystem is case insensitive then searching
		 * won't help.
		 */

		if ((conn->case_sensitive || !(conn->fs_capabilities &
					FILE_CASE_SENSITIVE_SEARCH)) &&
				!mangle_is_mangled(smb_fname->base_name, conn->params)) {

			status = check_for_dot_component(smb_fname);
			if (!NT_STATUS_IS_OK(status)) {
				goto fail;
			}

			/*
			 * The stat failed. Could be ok as it could be
 			 * a new file.
 			 */

			if (errno == ENOTDIR || errno == ELOOP) {
				status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
				goto fail;
			} else if (errno == ENOENT) {
				/*
				 * Was it a missing last component ?
				 * or a missing intermediate component ?
				 */
				struct smb_filename parent_fname;
				const char *last_component = NULL;

				ZERO_STRUCT(parent_fname);
				if (!parent_dirname(ctx, smb_fname->base_name,
							&parent_fname.base_name,
							&last_component)) {
					status = NT_STATUS_NO_MEMORY;
					goto fail;
				}
				if (posix_pathnames) {
					ret = SMB_VFS_LSTAT(conn, &parent_fname);
				} else {
					ret = SMB_VFS_STAT(conn, &parent_fname);
				}
				if (ret == -1) {
					if (errno == ENOTDIR ||
							errno == ENOENT ||
							errno == ELOOP) {
						status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
						goto fail;
					}
				}

				/*
				 * Missing last component is ok - new file.
				 * Also deal with permission denied elsewhere.
				 * Just drop out to done.
				 */
				goto done;
			}
		}
	} else {
		/*
		 * We have a wildcard in the pathname.
		 *
		 * Optimization for common case where the wildcard
		 * is in the last component and the client already
		 * sent the correct case.
		 */
		status = check_parent_exists(ctx,
					conn,
					posix_pathnames,
					smb_fname,
					&dirpath,
					&start);
		if (!NT_STATUS_IS_OK(status)) {
			goto fail;
		}
	}

	/*
	 * is_mangled() was changed to look at an entire pathname, not
	 * just a component. JRA.
	 */

	if (mangle_is_mangled(start, conn->params)) {
		component_was_mangled = True;
	}

	/*
	 * Now we need to recursively match the name against the real
	 * directory structure.
	 */

	/*
	 * Match each part of the path name separately, trying the names
	 * as is first, then trying to scan the directory for matching names.
	 */

	for (; start ; start = (end?end+1:(char *)NULL)) {
		/*
		 * Pinpoint the end of this section of the filename.
		 */
		/* mb safe. '/' can't be in any encoded char. */
		end = strchr(start, '/');

		/*
		 * Chop the name at this point.
		 */
		if (end) {
			*end = 0;
		}

		if (save_last_component) {
			TALLOC_FREE(smb_fname->original_lcomp);
			smb_fname->original_lcomp = talloc_strdup(smb_fname,
							end ? end + 1 : start);
			if (!smb_fname->original_lcomp) {
				DEBUG(0, ("talloc failed\n"));
				status = NT_STATUS_NO_MEMORY;
				goto err;
			}
		}

		/* The name cannot have a component of "." */

		if (ISDOT(start)) {
			if (!end)  {
				/* Error code at the end of a pathname. */
				status = NT_STATUS_OBJECT_NAME_INVALID;
			} else {
				status = determine_path_error(end+1,
						allow_wcard_last_component);
			}
			goto fail;
		}

		/* The name cannot have a wildcard if it's not
		   the last component. */

		name_has_wildcard = ms_has_wild(start);

		/* Wildcards never valid within a pathname. */
		if (name_has_wildcard && end) {
			status = NT_STATUS_OBJECT_NAME_INVALID;
			goto fail;
		}

		/* Skip the stat call if it's a wildcard end. */
		if (name_has_wildcard) {
			DEBUG(5,("Wildcard %s\n",start));
			goto done;
		}

		/*
		 * Check if the name exists up to this point.
		 */

		if (posix_pathnames) {
			ret = SMB_VFS_LSTAT(conn, smb_fname);
		} else {
			ret = SMB_VFS_STAT(conn, smb_fname);
		}

		if (ret == 0) {
			/*
			 * It exists. it must either be a directory or this must
			 * be the last part of the path for it to be OK.
			 */
			if (end && !S_ISDIR(smb_fname->st.st_ex_mode)) {
				/*
				 * An intermediate part of the name isn't
				 * a directory.
				 */
				DEBUG(5,("Not a dir %s\n",start));
				*end = '/';
				/*
				 * We need to return the fact that the
				 * intermediate name resolution failed. This
				 * is used to return an error of ERRbadpath
				 * rather than ERRbadfile. Some Windows
				 * applications depend on the difference between
				 * these two errors.
				 */
				status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
				goto fail;
			}

		} else {
			char *found_name = NULL;

			/* Stat failed - ensure we don't use it. */
			SET_STAT_INVALID(smb_fname->st);

			/*
			 * Reset errno so we can detect
			 * directory open errors.
			 */
			errno = 0;

			/*
			 * Try to find this part of the path in the directory.
			 */

			if (name_has_wildcard ||
			    (get_real_filename(conn, dirpath, start,
					       talloc_tos(),
					       &found_name) == -1)) {
				char *unmangled;

				if (end) {
					/*
					 * An intermediate part of the name
					 * can't be found.
					 */
					DEBUG(5,("Intermediate not found %s\n",
							start));
					*end = '/';

					/*
					 * We need to return the fact that the
					 * intermediate name resolution failed.
					 * This is used to return an error of
					 * ERRbadpath rather than ERRbadfile.
					 * Some Windows applications depend on
					 * the difference between these two
					 * errors.
					 */

					/*
					 * ENOENT, ENOTDIR and ELOOP all map
					 * to NT_STATUS_OBJECT_PATH_NOT_FOUND
					 * in the filename walk.
					 */

					if (errno == ENOENT ||
							errno == ENOTDIR ||
							errno == ELOOP) {
						status =
						NT_STATUS_OBJECT_PATH_NOT_FOUND;
					}
					else {
						status =
						map_nt_error_from_unix(errno);
					}
					goto fail;
				}

				/*
				 * ENOENT/EACCESS are the only valid errors
				 * here. EACCESS needs handling here for
				 * "dropboxes", i.e. directories where users
				 * can only put stuff with permission -wx.
				 */
				if ((errno != 0) && (errno != ENOENT)
				    && (errno != EACCES)) {
					/*
					 * ENOTDIR and ELOOP both map to
					 * NT_STATUS_OBJECT_PATH_NOT_FOUND
					 * in the filename walk.
					 */
					if (errno == ENOTDIR ||
							errno == ELOOP) {
						status =
						NT_STATUS_OBJECT_PATH_NOT_FOUND;
					} else {
						status =
						map_nt_error_from_unix(errno);
					}
					goto fail;
				}

				/*
				 * Just the last part of the name doesn't exist.
				 * We need to strupper() or strlower() it as
				 * this conversion may be used for file creation
				 * purposes. Fix inspired by
				 * Thomas Neumann <*****@*****.**>.
				 */
				if (!conn->case_preserve ||
				    (mangle_is_8_3(start, False,
						   conn->params) &&
						 !conn->short_case_preserve)) {
					strnorm(start,
						lp_defaultcase(SNUM(conn)));
				}

				/*
				 * check on the mangled stack to see if we can
				 * recover the base of the filename.
				 */

				if (mangle_is_mangled(start, conn->params)
				    && mangle_lookup_name_from_8_3(ctx,
					    		start,
							&unmangled,
							conn->params)) {
					char *tmp;
					size_t start_ofs =
					    start - smb_fname->base_name;

					if (*dirpath != '\0') {
						tmp = talloc_asprintf(
							smb_fname, "%s/%s",
							dirpath, unmangled);
						TALLOC_FREE(unmangled);
					}
					else {
						tmp = unmangled;
					}
					if (tmp == NULL) {
						DEBUG(0, ("talloc failed\n"));
						status = NT_STATUS_NO_MEMORY;
						goto err;
					}
					TALLOC_FREE(smb_fname->base_name);
					smb_fname->base_name = tmp;
					start =
					    smb_fname->base_name + start_ofs;
					end = start + strlen(start);
				}

				DEBUG(5,("New file %s\n",start));
				goto done;
			}


			/*
			 * Restore the rest of the string. If the string was
			 * mangled the size may have changed.
			 */
			if (end) {
				char *tmp;
				size_t start_ofs =
				    start - smb_fname->base_name;

				if (*dirpath != '\0') {
					tmp = talloc_asprintf(smb_fname,
						"%s/%s/%s", dirpath,
						found_name, end+1);
				}
				else {
					tmp = talloc_asprintf(smb_fname,
						"%s/%s", found_name,
						end+1);
				}
				if (tmp == NULL) {
					DEBUG(0, ("talloc_asprintf failed\n"));
					status = NT_STATUS_NO_MEMORY;
					goto err;
				}
				TALLOC_FREE(smb_fname->base_name);
				smb_fname->base_name = tmp;
				start = smb_fname->base_name + start_ofs;
				end = start + strlen(found_name);
				*end = '\0';
			} else {
				char *tmp;
				size_t start_ofs =
				    start - smb_fname->base_name;

				if (*dirpath != '\0') {
					tmp = talloc_asprintf(smb_fname,
						"%s/%s", dirpath,
						found_name);
				} else {
					tmp = talloc_strdup(smb_fname,
						found_name);
				}
				if (tmp == NULL) {
					DEBUG(0, ("talloc failed\n"));
					status = NT_STATUS_NO_MEMORY;
					goto err;
				}
				TALLOC_FREE(smb_fname->base_name);
				smb_fname->base_name = tmp;
				start = smb_fname->base_name + start_ofs;

				/*
				 * We just scanned for, and found the end of
				 * the path. We must return a valid stat struct
				 * if it exists. JRA.
				 */

				if (posix_pathnames) {
					ret = SMB_VFS_LSTAT(conn, smb_fname);
				} else {
					ret = SMB_VFS_STAT(conn, smb_fname);
				}

				if (ret != 0) {
					SET_STAT_INVALID(smb_fname->st);
				}
			}

			TALLOC_FREE(found_name);
		} /* end else */

#ifdef DEVELOPER
		/*
		 * This sucks!
		 * We should never provide different behaviors
		 * depending on DEVELOPER!!!
		 */
		if (VALID_STAT(smb_fname->st)) {
			bool delete_pending;
			uint32_t name_hash;

			status = file_name_hash(conn,
					smb_fname_str_dbg(smb_fname),
					&name_hash);
			if (!NT_STATUS_IS_OK(status)) {
				goto fail;
			}

			get_file_infos(vfs_file_id_from_sbuf(conn,
							     &smb_fname->st),
				       name_hash,
				       &delete_pending, NULL);
			if (delete_pending) {
				status = NT_STATUS_DELETE_PENDING;
				goto fail;
			}
		}
#endif

		/*
		 * Add to the dirpath that we have resolved so far.
		 */

		if (*dirpath != '\0') {
			char *tmp = talloc_asprintf(ctx,
					"%s/%s", dirpath, start);
			if (!tmp) {
				DEBUG(0, ("talloc_asprintf failed\n"));
				status = NT_STATUS_NO_MEMORY;
				goto err;
			}
			TALLOC_FREE(dirpath);
			dirpath = tmp;
		}
		else {
			TALLOC_FREE(dirpath);
			if (!(dirpath = talloc_strdup(ctx,start))) {
				DEBUG(0, ("talloc_strdup failed\n"));
				status = NT_STATUS_NO_MEMORY;
				goto err;
			}
		}

		/*
		 * Cache the dirpath thus far. Don't cache a name with mangled
		 * or wildcard components as this can change the size.
		 */
		if(!component_was_mangled && !name_has_wildcard) {
			stat_cache_add(orig_path, dirpath,
					conn->case_sensitive);
		}

		/*
		 * Restore the / that we wiped out earlier.
		 */
		if (end) {
			*end = '/';
		}
	}

	/*
	 * Cache the full path. Don't cache a name with mangled or wildcard
	 * components as this can change the size.
	 */

	if(!component_was_mangled && !name_has_wildcard) {
		stat_cache_add(orig_path, smb_fname->base_name,
			       conn->case_sensitive);
	}

	/*
	 * The name has been resolved.
	 */

	DEBUG(5,("conversion finished %s -> %s\n", orig_path,
		 smb_fname->base_name));

 done:
	/* Add back the stream if one was stripped off originally. */
	if (stream != NULL) {
		smb_fname->stream_name = stream;

		/* Check path now that the base_name has been converted. */
		status = build_stream_path(ctx, conn, orig_path, smb_fname);
		if (!NT_STATUS_IS_OK(status)) {
			goto fail;
		}
	}
	TALLOC_FREE(dirpath);
	*smb_fname_out = smb_fname;
	return NT_STATUS_OK;
 fail:
	DEBUG(10, ("dirpath = [%s] start = [%s]\n", dirpath, start));
	if (*dirpath != '\0') {
		smb_fname->base_name = talloc_asprintf(smb_fname, "%s/%s",
						       dirpath, start);
	} else {
		smb_fname->base_name = talloc_strdup(smb_fname, start);
	}
	if (!smb_fname->base_name) {
		DEBUG(0, ("talloc_asprintf failed\n"));
		status = NT_STATUS_NO_MEMORY;
		goto err;
	}

	*smb_fname_out = smb_fname;
	TALLOC_FREE(dirpath);
	return status;
 err:
	TALLOC_FREE(smb_fname);
	return status;
}
コード例 #5
0
ファイル: filename.c プロジェクト: gojdic/samba
NTSTATUS unix_convert(TALLOC_CTX *ctx,
			connection_struct *conn,
			const char *orig_path,
			bool allow_wcard_last_component,
			char **pp_conv_path,
			char **pp_saved_last_component,
			SMB_STRUCT_STAT *pst)
{
	SMB_STRUCT_STAT st;
	char *start, *end;
	char *dirpath = NULL;
	char *name = NULL;
	char *stream = NULL;
	bool component_was_mangled = False;
	bool name_has_wildcard = False;
	bool posix_pathnames = false;
	NTSTATUS result;
	int ret = -1;

	SET_STAT_INVALID(*pst);
	*pp_conv_path = NULL;
	if(pp_saved_last_component) {
		*pp_saved_last_component = NULL;
	}

	if (conn->printer) {
		/* we don't ever use the filenames on a printer share as a
			filename - so don't convert them */
		if (!(*pp_conv_path = talloc_strdup(ctx,orig_path))) {
			return NT_STATUS_NO_MEMORY;
		}
		return NT_STATUS_OK;
	}

	DEBUG(5, ("unix_convert called on file \"%s\"\n", orig_path));

	/*
	 * Conversion to basic unix format is already done in
	 * check_path_syntax().
	 */

	/*
	 * Names must be relative to the root of the service - any leading /.
	 * and trailing /'s should have been trimmed by check_path_syntax().
	 */

#ifdef DEVELOPER
	SMB_ASSERT(*orig_path != '/');
#endif

	/*
	 * If we trimmed down to a single '\0' character
	 * then we should use the "." directory to avoid
	 * searching the cache, but not if we are in a
	 * printing share.
	 * As we know this is valid we can return true here.
	 */

	if (!*orig_path) {
		if (!(name = talloc_strdup(ctx,"."))) {
			return NT_STATUS_NO_MEMORY;
		}
		if (SMB_VFS_STAT(conn,name,&st) == 0) {
			*pst = st;
		} else {
			return map_nt_error_from_unix(errno);
		}
		DEBUG(5,("conversion finished \"\" -> %s\n",name));
		goto done;
	}

	if (orig_path[0] == '.' && (orig_path[1] == '/' ||
				orig_path[1] == '\0')) {
		/* Start of pathname can't be "." only. */
		if (orig_path[1] == '\0' || orig_path[2] == '\0') {
			result = NT_STATUS_OBJECT_NAME_INVALID;
		} else {
			result =determine_path_error(
				&orig_path[2], allow_wcard_last_component);
		}
		return result;
	}

	if (!(name = talloc_strdup(ctx, orig_path))) {
		DEBUG(0, ("talloc_strdup failed\n"));
		return NT_STATUS_NO_MEMORY;
	}

	/*
	 * Large directory fix normalization. If we're case sensitive, and
	 * the case preserving parameters are set to "no", normalize the case of
	 * the incoming filename from the client WHETHER IT EXISTS OR NOT !
	 * This is in conflict with the current (3.0.20) man page, but is
	 * what people expect from the "large directory howto". I'll update
	 * the man page. Thanks to [email protected] for finding this. JRA.
	 */

	if (conn->case_sensitive && !conn->case_preserve &&
			!conn->short_case_preserve) {
		strnorm(name, lp_defaultcase(SNUM(conn)));
	}

	/*
	 * Ensure saved_last_component is valid even if file exists.
	 */

	if(pp_saved_last_component) {
		end = strrchr_m(name, '/');
		if (end) {
			*pp_saved_last_component = talloc_strdup(ctx, end + 1);
		} else {
			*pp_saved_last_component = talloc_strdup(ctx,
							name);
		}
	}

	posix_pathnames = lp_posix_pathnames();

	if (!posix_pathnames) {
		stream = strchr_m(name, ':');

		if (stream != NULL) {
			char *tmp = talloc_strdup(ctx, stream);
			if (tmp == NULL) {
				TALLOC_FREE(name);
				return NT_STATUS_NO_MEMORY;
			}
			*stream = '\0';
			stream = tmp;
		}
	}

	start = name;

	/* If we're providing case insentive semantics or
	 * the underlying filesystem is case insensitive,
	 * then a case-normalized hit in the stat-cache is
	 * authoratitive. JRA.
	 */

	if((!conn->case_sensitive || !(conn->fs_capabilities & FILE_CASE_SENSITIVE_SEARCH)) &&
			stat_cache_lookup(conn, &name, &dirpath, &start, &st)) {
		*pst = st;
		goto done;
	}

	/*
	 * Make sure "dirpath" is an allocated string, we use this for
	 * building the directories with asprintf and free it.
	 */

	if ((dirpath == NULL) && (!(dirpath = talloc_strdup(ctx,"")))) {
		DEBUG(0, ("talloc_strdup failed\n"));
		TALLOC_FREE(name);
		return NT_STATUS_NO_MEMORY;
	}

	/*
	 * stat the name - if it exists then we are all done!
	 */

	if (posix_pathnames) {
		ret = SMB_VFS_LSTAT(conn,name,&st);
	} else {
		ret = SMB_VFS_STAT(conn,name,&st);
	}

	if (ret == 0) {
		/* Ensure we catch all names with in "/."
		   this is disallowed under Windows. */
		const char *p = strstr(name, "/."); /* mb safe. */
		if (p) {
			if (p[2] == '/') {
				/* Error code within a pathname. */
				result = NT_STATUS_OBJECT_PATH_NOT_FOUND;
				goto fail;
			} else if (p[2] == '\0') {
				/* Error code at the end of a pathname. */
				result = NT_STATUS_OBJECT_NAME_INVALID;
				goto fail;
			}
		}
		stat_cache_add(orig_path, name, conn->case_sensitive);
		DEBUG(5,("conversion finished %s -> %s\n",orig_path, name));
		*pst = st;
		goto done;
	}

	DEBUG(5,("unix_convert begin: name = %s, dirpath = %s, start = %s\n",
				name, dirpath, start));

	/*
	 * A special case - if we don't have any mangling chars and are case
	 * sensitive or the underlying filesystem is case insentive then searching
	 * won't help.
	 */

	if ((conn->case_sensitive || !(conn->fs_capabilities & FILE_CASE_SENSITIVE_SEARCH)) &&
			!mangle_is_mangled(name, conn->params)) {
		goto done;
	}

	/*
	 * is_mangled() was changed to look at an entire pathname, not
	 * just a component. JRA.
	 */

	if (mangle_is_mangled(start, conn->params)) {
		component_was_mangled = True;
	}

	/*
	 * Now we need to recursively match the name against the real
	 * directory structure.
	 */

	/*
	 * Match each part of the path name separately, trying the names
	 * as is first, then trying to scan the directory for matching names.
	 */

	for (; start ; start = (end?end+1:(char *)NULL)) {
		/*
		 * Pinpoint the end of this section of the filename.
		 */
		/* mb safe. '/' can't be in any encoded char. */
		end = strchr(start, '/');

		/*
		 * Chop the name at this point.
		 */
		if (end) {
			*end = 0;
		}

		if (pp_saved_last_component) {
			TALLOC_FREE(*pp_saved_last_component);
			*pp_saved_last_component = talloc_strdup(ctx,
							end ? end + 1 : start);
			if (!*pp_saved_last_component) {
				DEBUG(0, ("talloc failed\n"));
				return NT_STATUS_NO_MEMORY;
			}
		}

		/* The name cannot have a component of "." */

		if (ISDOT(start)) {
			if (!end)  {
				/* Error code at the end of a pathname. */
				result = NT_STATUS_OBJECT_NAME_INVALID;
			} else {
				result = determine_path_error(end+1,
						allow_wcard_last_component);
			}
			goto fail;
		}

		/* The name cannot have a wildcard if it's not
		   the last component. */

		name_has_wildcard = ms_has_wild(start);

		/* Wildcard not valid anywhere. */
		if (name_has_wildcard && !allow_wcard_last_component) {
			result = NT_STATUS_OBJECT_NAME_INVALID;
			goto fail;
		}

		/* Wildcards never valid within a pathname. */
		if (name_has_wildcard && end) {
			result = NT_STATUS_OBJECT_NAME_INVALID;
			goto fail;
		}

		/*
		 * Check if the name exists up to this point.
		 */

		if (posix_pathnames) {
			ret = SMB_VFS_LSTAT(conn,name, &st);
		} else {
			ret = SMB_VFS_STAT(conn,name, &st);
		}

		if (ret == 0) {
			/*
			 * It exists. it must either be a directory or this must
			 * be the last part of the path for it to be OK.
			 */
			if (end && !(st.st_mode & S_IFDIR)) {
				/*
				 * An intermediate part of the name isn't
				 * a directory.
				 */
				DEBUG(5,("Not a dir %s\n",start));
				*end = '/';
				/*
				 * We need to return the fact that the
				 * intermediate name resolution failed. This
				 * is used to return an error of ERRbadpath
				 * rather than ERRbadfile. Some Windows
				 * applications depend on the difference between
				 * these two errors.
				 */
				result = NT_STATUS_OBJECT_PATH_NOT_FOUND;
				goto fail;
			}

			if (!end) {
				/*
				 * We just scanned for, and found the end of
				 * the path. We must return the valid stat
				 * struct. JRA.
				 */

				*pst = st;
			}

		} else {
			char *found_name = NULL;

			/* Stat failed - ensure we don't use it. */
			SET_STAT_INVALID(st);

			/*
			 * Reset errno so we can detect
			 * directory open errors.
			 */
			errno = 0;

			/*
			 * Try to find this part of the path in the directory.
			 */

			if (name_has_wildcard ||
			    (get_real_filename_mangled(
				     conn, dirpath, start,
				     talloc_tos(), &found_name) == -1)) {
				char *unmangled;

				if (end) {
					/*
					 * An intermediate part of the name
					 * can't be found.
					 */
					DEBUG(5,("Intermediate not found %s\n",
							start));
					*end = '/';

					/*
					 * We need to return the fact that the
					 * intermediate name resolution failed.
					 * This is used to return an error of
					 * ERRbadpath rather than ERRbadfile.
					 * Some Windows applications depend on
					 * the difference between these two
					 * errors.
					 */

					/*
					 * ENOENT, ENOTDIR and ELOOP all map
					 * to NT_STATUS_OBJECT_PATH_NOT_FOUND
					 * in the filename walk.
					 */

					if (errno == ENOENT ||
							errno == ENOTDIR ||
							errno == ELOOP) {
						result =
						NT_STATUS_OBJECT_PATH_NOT_FOUND;
					}
					else {
						result =
						map_nt_error_from_unix(errno);
					}
					goto fail;
				}

				/* ENOENT is the only valid error here. */
				if ((errno != 0) && (errno != ENOENT)) {
					/*
					 * ENOTDIR and ELOOP both map to
					 * NT_STATUS_OBJECT_PATH_NOT_FOUND
					 * in the filename walk.
					 */
					if (errno == ENOTDIR ||
							errno == ELOOP) {
						result =
						NT_STATUS_OBJECT_PATH_NOT_FOUND;
					}
					else {
						result =
						map_nt_error_from_unix(errno);
					}
					goto fail;
				}

				/*
				 * Just the last part of the name doesn't exist.
				 * We need to strupper() or strlower() it as
				 * this conversion may be used for file creation
				 * purposes. Fix inspired by
				 * Thomas Neumann <*****@*****.**>.
				 */
				if (!conn->case_preserve ||
				    (mangle_is_8_3(start, False,
						   conn->params) &&
						 !conn->short_case_preserve)) {
					strnorm(start,
						lp_defaultcase(SNUM(conn)));
				}

				/*
				 * check on the mangled stack to see if we can
				 * recover the base of the filename.
				 */

				if (mangle_is_mangled(start, conn->params)
				    && mangle_lookup_name_from_8_3(ctx,
					    		start,
							&unmangled,
							conn->params)) {
					char *tmp;
					size_t start_ofs = start - name;

					if (*dirpath != '\0') {
						tmp = talloc_asprintf(ctx,
							"%s/%s", dirpath,
							unmangled);
						TALLOC_FREE(unmangled);
					}
					else {
						tmp = unmangled;
					}
					if (tmp == NULL) {
						DEBUG(0, ("talloc failed\n"));
						return NT_STATUS_NO_MEMORY;
					}
					TALLOC_FREE(name);
					name = tmp;
					start = name + start_ofs;
					end = start + strlen(start);
				}

				DEBUG(5,("New file %s\n",start));
				goto done;
			}


			/*
			 * Restore the rest of the string. If the string was
			 * mangled the size may have changed.
			 */
			if (end) {
				char *tmp;
				size_t start_ofs = start - name;

				if (*dirpath != '\0') {
					tmp = talloc_asprintf(ctx,
						"%s/%s/%s", dirpath,
						found_name, end+1);
				}
				else {
					tmp = talloc_asprintf(ctx,
						"%s/%s", found_name,
						end+1);
				}
				if (tmp == NULL) {
					DEBUG(0, ("talloc_asprintf failed\n"));
					return NT_STATUS_NO_MEMORY;
				}
				TALLOC_FREE(name);
				name = tmp;
				start = name + start_ofs;
				end = start + strlen(found_name);
				*end = '\0';
			} else {
				char *tmp;
				size_t start_ofs = start - name;

				if (*dirpath != '\0') {
					tmp = talloc_asprintf(ctx,
						"%s/%s", dirpath,
						found_name);
				} else {
					tmp = talloc_strdup(ctx,
						found_name);
				}
				if (tmp == NULL) {
					DEBUG(0, ("talloc failed\n"));
					return NT_STATUS_NO_MEMORY;
				}
				TALLOC_FREE(name);
				name = tmp;
				start = name + start_ofs;

				/*
				 * We just scanned for, and found the end of
				 * the path. We must return a valid stat struct
				 * if it exists. JRA.
				 */

				if (posix_pathnames) {
					ret = SMB_VFS_LSTAT(conn,name, &st);
				} else {
					ret = SMB_VFS_STAT(conn,name, &st);
				}

				if (ret == 0) {
					*pst = st;
				} else {
					SET_STAT_INVALID(st);
				}
			}

			TALLOC_FREE(found_name);
		} /* end else */

#ifdef DEVELOPER
		/*
		 * This sucks!
		 * We should never provide different behaviors
		 * depending on DEVELOPER!!!
		 */
		if (VALID_STAT(st)) {
			bool delete_pending;
			get_file_infos(vfs_file_id_from_sbuf(conn, &st),
				       &delete_pending, NULL);
			if (delete_pending) {
				result = NT_STATUS_DELETE_PENDING;
				goto fail;
			}
		}
#endif

		/*
		 * Add to the dirpath that we have resolved so far.
		 */

		if (*dirpath != '\0') {
			char *tmp = talloc_asprintf(ctx,
					"%s/%s", dirpath, start);
			if (!tmp) {
				DEBUG(0, ("talloc_asprintf failed\n"));
				return NT_STATUS_NO_MEMORY;
			}
			TALLOC_FREE(dirpath);
			dirpath = tmp;
		}
		else {
			TALLOC_FREE(dirpath);
			if (!(dirpath = talloc_strdup(ctx,start))) {
				DEBUG(0, ("talloc_strdup failed\n"));
				return NT_STATUS_NO_MEMORY;
			}
		}

		/*
		 * Don't cache a name with mangled or wildcard components
		 * as this can change the size.
		 */

		if(!component_was_mangled && !name_has_wildcard) {
			stat_cache_add(orig_path, dirpath,
					conn->case_sensitive);
		}

		/*
		 * Restore the / that we wiped out earlier.
		 */
		if (end) {
			*end = '/';
		}
	}

	/*
	 * Don't cache a name with mangled or wildcard components
	 * as this can change the size.
	 */

	if(!component_was_mangled && !name_has_wildcard) {
		stat_cache_add(orig_path, name, conn->case_sensitive);
	}

	/*
	 * The name has been resolved.
	 */

	DEBUG(5,("conversion finished %s -> %s\n",orig_path, name));

 done:
	if (stream != NULL) {
		char *tmp = NULL;

		result = build_stream_path(ctx, conn, orig_path, name, stream,
					   pst, &tmp);
		if (!NT_STATUS_IS_OK(result)) {
			goto fail;
		}

		DEBUG(10, ("build_stream_path returned %s\n", tmp));

		TALLOC_FREE(name);
		name = tmp;
	}
	*pp_conv_path = name;
	TALLOC_FREE(dirpath);
	return NT_STATUS_OK;
 fail:
	DEBUG(10, ("dirpath = [%s] start = [%s]\n", dirpath, start));
	if (*dirpath != '\0') {
		*pp_conv_path = talloc_asprintf(ctx,
				"%s/%s", dirpath, start);
	} else {
		*pp_conv_path = talloc_strdup(ctx, start);
	}
	if (!*pp_conv_path) {
		DEBUG(0, ("talloc_asprintf failed\n"));
		return NT_STATUS_NO_MEMORY;
	}
	TALLOC_FREE(name);
	TALLOC_FREE(dirpath);
	return result;
}