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24c3e34344
This code assumes, like Bazel's runfiles that the data dependency to access
exists in the same sub-tree as the binary:
WORKSPACE
+- sandboxed_api/sandbox2/examples/crc4
+- crc4bin
+- crc4sandbox
The code requires the directory structure to exist, so that in the example
above, crc4sandbox can use
GetDataDependencyFilepath("sandboxed_api/sandbox2/examples/crc4/crc4bin")
regardless of how it was called.
PiperOrigin-RevId: 251834480
Change-Id: I6470b62ce9b403297116481a0c17c070992f2e81
48 lines
1.7 KiB
C++
48 lines
1.7 KiB
C++
// Copyright 2019 Google LLC. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <unistd.h>
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#include <cstdlib>
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#include "absl/strings/str_format.h"
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#include "absl/strings/strip.h"
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#include "sandboxed_api/sandbox2/util/path.h"
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#include "sandboxed_api/sandbox2/util/runfiles.h"
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#include "sandboxed_api/util/raw_logging.h"
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namespace sandbox2 {
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std::string GetDataDependencyFilePath(absl::string_view relative_path) {
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static std::string* base_dir = []() {
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std::string link_name(PATH_MAX, '\0');
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SAPI_RAW_PCHECK(
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readlink("/proc/self/exe", &link_name[0], link_name.size()) != -1, "");
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link_name.resize(link_name.find_first_of('\0'));
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return new std::string(file::SplitPath(link_name).first);
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}();
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absl::string_view resolved =
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absl::StripSuffix(*base_dir, file::SplitPath(relative_path).first);
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return file::JoinPath(resolved, relative_path);
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}
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std::string GetInternalDataDependencyFilePath(absl::string_view relative_path) {
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// The Bazel version has an additional "com_google_sandboxed_api" path
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// component.
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return GetDataDependencyFilePath(
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file::JoinPath("sandboxed_api", relative_path));
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}
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} // namespace sandbox2
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