Revert^2 "Add Rust interface for DropBoxManager" (868f22bf) · Commits · e / os / android_frameworks_base

core/java/Android.bp

+7 −0

Original line number	Diff line number	Diff line
		@@ -112,6 +112,13 @@ aidl_interface {
		java: {
		enabled: false, // TODO(b/424186512) switch frameworks/base to using this as well, it uses core build */.aidl glob now
		},
		rust: {
		enabled: true,
		apex_available: [
		"//apex_available:platform",
		"com.android.virt",
		],
		},
		},
		}

libs/services/Android.bp

+33 −0

Original line number	Diff line number	Diff line
		@@ -57,6 +57,39 @@ cc_library_shared {
		],
		}

		rust_defaults {
		name: "libdropbox_rs_defaults",
		srcs: ["src/dropboxmanager.rs"],
		prefer_rlib: true,
		rustlibs: [
		"libanyhow",
		"libbinder_rs",
		"liblog_rust",
		"liblogger",
		"librustutils",
		"dropboxmanager_aidl-rust",
		],
		}

		rust_library {
		name: "libdropbox_rs",
		crate_name: "dropbox_rs",
		defaults: ["libdropbox_rs_defaults"],
		visibility: [
		"//packages/modules/Virtualization:__subpackages__",
		],
		apex_available: [
		"com.android.virt",
		],
		}

		rust_test {
		name: "DropBoxManagerTestRust",
		team: "trendy_team_framework_bpm",
		defaults: ["libdropbox_rs_defaults"],
		require_root: true,
		}

		cc_test {
		name: "DropBoxManagerTestCpp",
		team: "trendy_team_framework_bpm",

libs/services/src/dropboxmanager.rs

0 → 100644

+85 −0

Original line number	Diff line number	Diff line
		// Copyright (C) 2025 The Android Open Source Project
		//
		// Licensed under the Apache License, Version 2.0 (the "License");
		// you may not use this file except in compliance with the License.
		// You may obtain a copy of the License at
		//
		// http://www.apache.org/licenses/LICENSE-2.0
		//
		// Unless required by applicable law or agreed to in writing, software
		// distributed under the License is distributed on an "AS IS" BASIS,
		// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		// See the License for the specific language governing permissions and
		// limitations under the License.

		//! Rust interface to the dropbox service.
		use anyhow::Result;
		use binder::{wait_for_interface, Strong};
		use dropboxmanager_aidl::aidl::com::android::internal::os::IDropBoxManagerService::IDropBoxManagerService;

		const INTERFACE_NAME: &str = "dropbox";

		/// Interface to the DropBox system service.
		pub struct DropBoxManager {
		binder: Strong<dyn IDropBoxManagerService>,
		}

		impl DropBoxManager {
		/// Acquires the underlying binder interface.
		pub fn new() -> Result<Self> {
		Ok(Self { binder: wait_for_interface(INTERFACE_NAME)? })
		}

		/// Creates a dropbox entry with the supplied tag. The supplied text is passed as bytes to create the file contents.
		pub fn add_text(&self, tag: &str, text: &str) -> Result<()> {
		self.binder.addData(tag, text.as_bytes(), 2 /* DropBoxManager.java IS_TEXT */)?;
		Ok(())
		}
		}

		#[cfg(test)]
		mod tests {
		use super::*;
		use std::fs;
		use std::path::PathBuf;

		const DROPBOX_PATH: &str = "/data/system/dropbox";
		const TAG: &str = "foo";
		const CONTENT: &str = "bar\nbaz\n";

		#[test]
		fn add_text() {
		let _ = find_dropbox_files(true).unwrap();
		let manager = DropBoxManager::new().unwrap();
		manager.add_text(TAG, CONTENT).unwrap();
		let path_buf = find_dropbox_files(false).unwrap().unwrap();
		let content = fs::read_to_string(path_buf.as_path()).unwrap();
		assert_eq!(content, CONTENT);
		}

		fn find_dropbox_files(delete_them: bool) -> Result<Option<PathBuf>> {
		let mut found = None;
		for entry in fs::read_dir(DROPBOX_PATH)? {
		let entry = entry?;
		let path_buf = entry.path();
		if !path_buf.is_file() {
		continue;
		}
		let Some(filename) = path_buf.file_name() else {
		continue;
		};
		let filename = filename.to_string_lossy();
		if !filename.starts_with(TAG) {
		continue;
		}

		found = Some(path_buf.clone());
		if delete_them {
		fs::remove_file(&path_buf)?;
		} else {
		break;
		}
		}
		Ok(found)
		}
		}