// Copyright (c) 2011 The Chromium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file.
// BEFORE using anything from this file, first look at PLOG and friends in // logging.h and use them instead if applicable. // // This file declares safe, portable alternatives to the POSIX strerror() // function. strerror() is inherently unsafe in multi-threaded apps and should // never be used. Doing so can cause crashes. Additionally, the thread-safe // alternative strerror_r varies in semantics across platforms. Use these // functions instead.
// Thread-safe strerror function with dependable semantics that never fails. // It will write the string form of error "err" to buffer buf of length len. // If there is an error calling the OS's strerror_r() function then a message to // that effect will be printed into buf, truncating if necessary. The final // result is always null-terminated. The value of errno is never changed. // // Use this instead of strerror_r().
BASE_EXPORT void safe_strerror_r(int err, char *buf, size_t len);
// Calls safe_strerror_r with a buffer of suitable size and returns the result // in a C++ string. // // Use this instead of strerror(). Note though that safe_strerror_r will be // more robust in the case of heap corruption errors, since it doesn't need to // allocate a string.
BASE_EXPORT std::string safe_strerror(int err);
} // namespace base
#endif// BASE_POSIX_SAFE_STRERROR_H_
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