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// Copyright 2018 The gVisor Authors.
//
// 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 "test/util/posix_error.h"
#include <cassert>
#include <cerrno>
#include <cstring>
#include <string>
#include "absl/strings/str_cat.h"
namespace gvisor {
namespace testing {
std::string PosixError::ToString() const {
if (ok()) {
return "No Error";
}
std::string ret;
char strerrno_buf[1024] = {};
auto res = strerror_r(errno_, strerrno_buf, sizeof(strerrno_buf));
// The GNU version of strerror_r always returns a non-null char* pointing to a
// buffer containing the stringified errno; the XSI version returns a positive
// errno which indicates the result of writing the stringified errno into the
// supplied buffer. The gymnastics below are needed to support both.
#ifndef _GNU_SOURCE
if (res != 0) {
ret = absl::StrCat("PosixError(errno=", errno_, " strerror_r FAILED(", ret,
"))");
} else {
ret = absl::StrCat("PosixError(errno=", errno_, " ", strerrno_buf, ")");
}
#else
ret = absl::StrCat("PosixError(errno=", errno_, " ", res, ")");
#endif
if (strnlen(msg_, sizeof(msg_)) > 0) {
ret.append(" ");
ret.append(msg_);
}
return ret;
}
::std::ostream& operator<<(::std::ostream& os, const PosixError& e) {
os << e.ToString();
return os;
}
void PosixErrorIsMatcherCommonImpl::DescribeTo(std::ostream* os) const {
*os << "has an errno value that ";
code_matcher_.DescribeTo(os);
*os << ", and has an error message that ";
message_matcher_.DescribeTo(os);
}
void PosixErrorIsMatcherCommonImpl::DescribeNegationTo(std::ostream* os) const {
*os << "has an errno value that ";
code_matcher_.DescribeNegationTo(os);
*os << ", or has an error message that ";
message_matcher_.DescribeNegationTo(os);
}
bool PosixErrorIsMatcherCommonImpl::MatchAndExplain(
const PosixError& error,
::testing::MatchResultListener* result_listener) const {
::testing::StringMatchResultListener inner_listener;
inner_listener.Clear();
if (!code_matcher_.MatchAndExplain(error.errno_value(), &inner_listener)) {
return false;
}
if (!message_matcher_.Matches(error.message())) {
return false;
}
return true;
}
} // namespace testing
} // namespace gvisor
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