1 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #ifndef BASE_SAFE_STRERROR_POSIX_H_
6 #define BASE_SAFE_STRERROR_POSIX_H_
10 // BEFORE using anything from this file, first look at PLOG and friends in
11 // logging.h and use them instead if applicable.
13 // This file declares safe, portable alternatives to the POSIX strerror()
14 // function. strerror() is inherently unsafe in multi-threaded apps and should
15 // never be used. Doing so can cause crashes. Additionally, the thread-safe
16 // alternative strerror_r varies in semantics across platforms. Use these
19 // Thread-safe strerror function with dependable semantics that never fails.
20 // It will write the string form of error "err" to buffer buf of length len.
21 // If there is an error calling the OS's strerror_r() function then a message to
22 // that effect will be printed into buf, truncating if necessary. The final
23 // result is always null-terminated. The value of errno is never changed.
25 // Use this instead of strerror_r().
26 void safe_strerror_r(int err
, char *buf
, size_t len
);
28 // Calls safe_strerror_r with a buffer of suitable size and returns the result
31 // Use this instead of strerror(). Note though that safe_strerror_r will be
32 // more robust in the case of heap corruption errors, since it doesn't need to
34 std::string
safe_strerror(int err
);
36 #endif // BASE_SAFE_STRERROR_POSIX_H_