libbinder: separate OS-specific code from Utils.cpp
Separate the OS-specific functions setNonBlocking and
getRandomBytes from Utils.cpp into a separate OS-specific
OS.cpp file that other operating systems can override at
build time.
Bug: 224644083
Test: build Trusty
Change-Id: I2703fb81d4370b5f6264556ae57fdddb0573971a
diff --git a/libs/binder/Android.bp b/libs/binder/Android.bp
index 3d515b5..25754e8 100644
--- a/libs/binder/Android.bp
+++ b/libs/binder/Android.bp
@@ -88,6 +88,7 @@
"IInterface.cpp",
"IResultReceiver.cpp",
"IShellCallback.cpp",
+ "OS.cpp",
"Parcel.cpp",
"ParcelFileDescriptor.cpp",
"RpcSession.cpp",
diff --git a/libs/binder/OS.cpp b/libs/binder/OS.cpp
new file mode 100644
index 0000000..6eb7272
--- /dev/null
+++ b/libs/binder/OS.cpp
@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2022 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.
+ */
+
+#include "OS.h"
+
+#include <android-base/file.h>
+#include <string.h>
+
+using android::base::ErrnoError;
+using android::base::Result;
+
+namespace android {
+
+Result<void> setNonBlocking(android::base::borrowed_fd fd) {
+ int flags = TEMP_FAILURE_RETRY(fcntl(fd.get(), F_GETFL));
+ if (flags == -1) {
+ return ErrnoError() << "Could not get flags for fd";
+ }
+ if (int ret = TEMP_FAILURE_RETRY(fcntl(fd.get(), F_SETFL, flags | O_NONBLOCK)); ret == -1) {
+ return ErrnoError() << "Could not set non-blocking flag for fd";
+ }
+ return {};
+}
+
+status_t getRandomBytes(uint8_t* data, size_t size) {
+ int ret = TEMP_FAILURE_RETRY(open("/dev/urandom", O_RDONLY | O_CLOEXEC | O_NOFOLLOW));
+ if (ret == -1) {
+ return -errno;
+ }
+
+ base::unique_fd fd(ret);
+ if (!base::ReadFully(fd, data, size)) {
+ return -errno;
+ }
+ return OK;
+}
+
+} // namespace android
diff --git a/libs/binder/OS.h b/libs/binder/OS.h
new file mode 100644
index 0000000..e802e9c
--- /dev/null
+++ b/libs/binder/OS.h
@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2022 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.
+ */
+#pragma once
+
+#include <stddef.h>
+#include <cstdint>
+
+#include <android-base/result.h>
+#include <android-base/unique_fd.h>
+#include <utils/Errors.h>
+
+namespace android {
+
+android::base::Result<void> setNonBlocking(android::base::borrowed_fd fd);
+
+status_t getRandomBytes(uint8_t* data, size_t size);
+
+} // namespace android
diff --git a/libs/binder/RpcServer.cpp b/libs/binder/RpcServer.cpp
index 1cd1fd3..ee90710 100644
--- a/libs/binder/RpcServer.cpp
+++ b/libs/binder/RpcServer.cpp
@@ -34,6 +34,7 @@
#include "BuildFlags.h"
#include "FdTrigger.h"
+#include "OS.h"
#include "RpcSocketAddress.h"
#include "RpcState.h"
#include "RpcWireFormat.h"
diff --git a/libs/binder/RpcSession.cpp b/libs/binder/RpcSession.cpp
index 2d9c933..80f6a37 100644
--- a/libs/binder/RpcSession.cpp
+++ b/libs/binder/RpcSession.cpp
@@ -37,6 +37,7 @@
#include <utils/String8.h>
#include "FdTrigger.h"
+#include "OS.h"
#include "RpcSocketAddress.h"
#include "RpcState.h"
#include "RpcWireFormat.h"
diff --git a/libs/binder/Utils.cpp b/libs/binder/Utils.cpp
index b0289a7..0314b0f 100644
--- a/libs/binder/Utils.cpp
+++ b/libs/binder/Utils.cpp
@@ -16,40 +16,12 @@
#include "Utils.h"
-#include <android-base/file.h>
#include <string.h>
-using android::base::ErrnoError;
-using android::base::Result;
-
namespace android {
void zeroMemory(uint8_t* data, size_t size) {
memset(data, 0, size);
}
-Result<void> setNonBlocking(android::base::borrowed_fd fd) {
- int flags = TEMP_FAILURE_RETRY(fcntl(fd.get(), F_GETFL));
- if (flags == -1) {
- return ErrnoError() << "Could not get flags for fd";
- }
- if (int ret = TEMP_FAILURE_RETRY(fcntl(fd.get(), F_SETFL, flags | O_NONBLOCK)); ret == -1) {
- return ErrnoError() << "Could not set non-blocking flag for fd";
- }
- return {};
-}
-
-status_t getRandomBytes(uint8_t* data, size_t size) {
- int ret = TEMP_FAILURE_RETRY(open("/dev/urandom", O_RDONLY | O_CLOEXEC | O_NOFOLLOW));
- if (ret == -1) {
- return -errno;
- }
-
- base::unique_fd fd(ret);
- if (!base::ReadFully(fd, data, size)) {
- return -errno;
- }
- return OK;
-}
-
} // namespace android
diff --git a/libs/binder/Utils.h b/libs/binder/Utils.h
index 37c1262..7c6d6f1 100644
--- a/libs/binder/Utils.h
+++ b/libs/binder/Utils.h
@@ -15,11 +15,10 @@
*/
#include <stddef.h>
+#include <sys/uio.h>
#include <cstdint>
#include <optional>
-#include <android-base/result.h>
-#include <android-base/unique_fd.h>
#include <log/log.h>
#include <utils/Errors.h>
@@ -36,10 +35,6 @@
// avoid optimizations
void zeroMemory(uint8_t* data, size_t size);
-android::base::Result<void> setNonBlocking(android::base::borrowed_fd fd);
-
-status_t getRandomBytes(uint8_t* data, size_t size);
-
// View of contiguous sequence. Similar to std::span.
template <typename T>
struct Span {