sandbox2/util: Expose C-Wrapper for IsRunningInSandbox2.

Creates a new library which can be used to expose C-Wrappers for the C++ functions defined in sandboxed_api/sandbox2/util.h.

Wrappers are implemented on a as-needed-basis, starting with `sandbox2::util::IsRunningInSandbox2`.

PiperOrigin-RevId: 732018626
Change-Id: Id44f90b92d053d2a22255c14d10b5c1adae7aedf

Author: okunz

sandboxed_api/sandbox2/BUILD

@@ -777,6 +777,20 @@ cc_library(
     ],
 )
 
+# Library for C-wrappers of util.h.
+cc_library(
+    name = "util_c",
+    srcs = ["util_c.cc"],
+    hdrs = ["util_c.h"],
+    copts = sapi_platform_copts(),
+    visibility = ["//visibility:public"],
+    deps = [
+        ":util",
+        "@com_google_absl//absl/log",
+        "@com_google_absl//absl/status:statusor",
+    ],
+)
+
 cc_library(
     name = "buffer",
     srcs = ["buffer.cc"],

sandboxed_api/sandbox2/CMakeLists.txt

@@ -708,6 +708,19 @@ target_compile_options(sandbox2_util PRIVATE
   -Wframe-larger-than=17000
 )
 
+# sandboxed_api/sandbox2:util_c
+add_library(sandbox2_util_c ${SAPI_LIB_TYPE}
+  util_c.cc
+  util_c.h
+)
+add_library(sandbox2::util_c ALIAS sandbox2_util_c)
+target_link_libraries(sandbox2_util_c
+  PRIVATE absl::statusor
+          absl::log
+          sandbox2::util
+          sapi::base
+)
+
 # sandboxed_api/sandbox2:buffer
 add_library(sandbox2_buffer ${SAPI_LIB_TYPE}
   buffer.cc

sandboxed_api/sandbox2/util_c.cc

@@ -0,0 +1,29 @@
+// Copyright 2025 Google LLC
+//
+// 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
+//
+//     https://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 "sandboxed_api/sandbox2/util_c.h"
+
+#include "absl/log/log.h"
+#include "absl/status/statusor.h"
+#include "sandboxed_api/sandbox2/util.h"
+
+// Returns true if the current process is running inside Sandbox2.
+bool IsRunningInSandbox2() {
+  absl::StatusOr<bool> result = sandbox2::util::IsRunningInSandbox2();
+  if (!result.ok()) {
+    LOG(ERROR) << result.status();
+    return false;
+  }
+  return *result;
+}

sandboxed_api/sandbox2/util_c.h

@@ -0,0 +1,34 @@
+// Copyright 2025 Google LLC
+//
+// 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
+//
+//     https://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.
+
+// This header provides a C-wrapper for sandbox2::util functions that may be
+// useful in C hostcode.
+
+#ifndef SANDBOXED_API_SANDBOX2_UTIL_C_H_
+#define SANDBOXED_API_SANDBOX2_UTIL_C_H_
+
+#include <stdbool.h>
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+// Returns true if the current process is running inside Sandbox2.
+bool IsRunningInSandbox2();
+
+#if defined(__cplusplus)
+}  // extern "C"
+#endif
+
+#endif  // SANDBOXED_API_SANDBOX2_UTIL_C_H_