sandboxed-api/sandboxed_api/sandbox2/util/runfiles_nobazel.cc
Christian Blichmann 24c3e34344 Implement a GetDataDependencyFilepath() for CMake (non-Bazel really).
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
2019-06-06 05:44:32 -07:00

48 lines
1.7 KiB
C++

// Copyright 2019 Google LLC. All Rights Reserved.
//
// 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 <unistd.h>
#include <cstdlib>
#include "absl/strings/str_format.h"
#include "absl/strings/strip.h"
#include "sandboxed_api/sandbox2/util/path.h"
#include "sandboxed_api/sandbox2/util/runfiles.h"
#include "sandboxed_api/util/raw_logging.h"
namespace sandbox2 {
std::string GetDataDependencyFilePath(absl::string_view relative_path) {
static std::string* base_dir = []() {
std::string link_name(PATH_MAX, '\0');
SAPI_RAW_PCHECK(
readlink("/proc/self/exe", &link_name[0], link_name.size()) != -1, "");
link_name.resize(link_name.find_first_of('\0'));
return new std::string(file::SplitPath(link_name).first);
}();
absl::string_view resolved =
absl::StripSuffix(*base_dir, file::SplitPath(relative_path).first);
return file::JoinPath(resolved, relative_path);
}
std::string GetInternalDataDependencyFilePath(absl::string_view relative_path) {
// The Bazel version has an additional "com_google_sandboxed_api" path
// component.
return GetDataDependencyFilePath(
file::JoinPath("sandboxed_api", relative_path));
}
} // namespace sandbox2