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dbaf95c724
This change should make it less confusing where utility code comes from. Having it in two places made sense when we were debating whether to publish Sandbox2 separately, but not any longer. Follow-up changes will move `sandbox2/util.h` and rename the remaining `sandbox2/util` folder. PiperOrigin-RevId: 351601640 Change-Id: I6256845261f610e590c25e2c59851cc51da2d778
63 lines
2.0 KiB
C++
63 lines
2.0 KiB
C++
// Copyright 2019 Google LLC
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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 "sandboxed_api/util/strerror.h"
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#include <string.h> // For strerror_r
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#include <cerrno>
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#include <cstddef>
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#include "absl/base/attributes.h"
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#include "absl/strings/str_cat.h"
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namespace sapi {
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namespace {
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// Only one of these overloads will be used in any given build, as determined by
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// the return type of strerror_r(): char* (for GNU), or int (for XSI). See 'man
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// strerror_r' for more details.
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ABSL_ATTRIBUTE_UNUSED const char* StrErrorR(char* (*strerror_r)(int, char*,
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size_t),
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int errnum, char* buf,
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size_t buflen) {
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return strerror_r(errnum, buf, buflen);
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}
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// The XSI version (most portable).
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ABSL_ATTRIBUTE_UNUSED const char* StrErrorR(int (*strerror_r)(int, char*,
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size_t),
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int errnum, char* buf,
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size_t buflen) {
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if (strerror_r(errnum, buf, buflen)) {
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*buf = '\0';
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}
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return buf;
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}
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} // namespace
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std::string StrError(int errnum) {
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const int saved_errno = errno;
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char buf[100];
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const char* str = StrErrorR(strerror_r, errnum, buf, sizeof(buf));
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if (*str == '\0') {
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return absl::StrCat("Unknown error ", errnum);
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}
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errno = saved_errno;
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return str;
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}
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} // namespace sapi
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