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125 lines
4.5 KiB
Plaintext
125 lines
4.5 KiB
Plaintext
// Copyright 2015 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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module filesystem.mojom;
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import "components/services/filesystem/public/interfaces/file.mojom";
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import "components/services/filesystem/public/interfaces/types.mojom";
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import "mojo/public/mojom/base/file.mojom";
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import "mojo/public/mojom/base/file_error.mojom";
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struct FileOpenDetails {
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string path;
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uint32 open_flags;
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};
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struct FileOpenResult {
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string path;
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mojo_base.mojom.FileError error;
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mojo_base.mojom.File? file_handle;
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};
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// This interface provides access to a directory in a "file system", providing
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// operations such as creating/opening/removing/renaming files/directories
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// within it. Note that all relative |path| arguments are relative to "this"
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// directory (i.e., "this" directory functions as the current working directory
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// for the various operations).
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// TODO(vtl): Paths may be relative; should they allowed to be absolute?
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// (Currently not.)
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interface Directory {
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// Operations about "this" |Directory|:
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// Reads the contents of this directory.
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// TODO(vtl): Clarify error codes versus |directory_contents|.
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[Sync]
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Read() => (mojo_base.mojom.FileError error,
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array<DirectoryEntry>? directory_contents);
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// Operations *in* "this" |Directory|:
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// Opens the file specified by |path| with the given |open_flags|. |file| is
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// optional, mainly for consistency with |OpenDirectory()| (but may be useful,
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// together with |kOpenFlagCreate|, for "touching" a file).
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[Sync]
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OpenFile(string path, File&? file, uint32 open_flags)
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=> (mojo_base.mojom.FileError error);
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// Opens the file specified by |path| with the given |open_flags|. Returns a
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// native file descriptor wrapped in a MojoHandle.
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[Sync]
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OpenFileHandle(string path, uint32 open_flags)
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=> (mojo_base.mojom.FileError error,
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mojo_base.mojom.File? file_handle);
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// Like OpenFileHandle, but opens multiple files.
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[Sync]
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OpenFileHandles(array<FileOpenDetails> files)
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=> (array<FileOpenResult> results);
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// Opens the directory specified by |path|. |directory| is optional, so that
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// this may be used as a simple "mkdir()" with |kOpenFlagCreate|.
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[Sync]
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OpenDirectory(string path,
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Directory&? directory,
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uint32 open_flags) => (mojo_base.mojom.FileError error);
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// Renames/moves the file/directory given by |path| to |new_path|.
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[Sync]
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Rename(string path, string new_path) => (mojo_base.mojom.FileError error);
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// Renames file |path| to |new_path|. Both paths must be on the same volume,
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// or the function will fail. Destination file will be created if it doesn't
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// exist. Prefer this function over Rename when dealing with temporary files.
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// On Windows it preserves attributes of the target file.
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[Sync]
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Replace(string path, string new_path) => (mojo_base.mojom.FileError error);
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// Deletes the given path, which may be a file or a directory (see
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// |kDeleteFlag...| for details).
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[Sync]
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Delete(string path, uint32 delete_flags)
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=> (mojo_base.mojom.FileError error);
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// Returns true if |path| exists.
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[Sync]
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Exists(string path) => (mojo_base.mojom.FileError error, bool exists);
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// Returns true if |path| is writable.
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[Sync]
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IsWritable(string path)
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=> (mojo_base.mojom.FileError error, bool is_writable);
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// Opens a file descriptor on this directory and calls
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// fsync()/FlushFileBuffers().
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[Sync]
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Flush() => (mojo_base.mojom.FileError error);
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// Gets information about this file. On success, |file_information| is
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// non-null and will contain this information.
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[Sync]
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StatFile(string path)
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=> (mojo_base.mojom.FileError error, FileInformation? file_information);
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// Creates a copy of this directory.
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Clone(Directory& directory);
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// Reads the contents of an entire file.
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[Sync]
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ReadEntireFile(string path)
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=> (mojo_base.mojom.FileError error, array<uint8> data);
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// Writes |data| to |path|, overwriting the file if it already exists.
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[Sync]
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WriteFile(string path, array<uint8> data)
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=> (mojo_base.mojom.FileError error);
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// TODO(vtl): directory "streaming"?
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// TODO(vtl): "make root" (i.e., prevent cd-ing, etc., to parent); note that
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// this would require a much more complicated implementation (e.g., it needs
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// to be "inherited" by OpenDirectory(), and the enforcement needs to be valid
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// even if the opened directory is subsequently moved -- e.g., closer to the
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// "root")
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// TODO(vtl): Add a "watch"?
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};
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