diff options
Diffstat (limited to 'security/sandbox/chromium/base/posix/safe_strerror.h')
-rw-r--r-- | security/sandbox/chromium/base/posix/safe_strerror.h | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/security/sandbox/chromium/base/posix/safe_strerror.h b/security/sandbox/chromium/base/posix/safe_strerror.h new file mode 100644 index 0000000000..2945312910 --- /dev/null +++ b/security/sandbox/chromium/base/posix/safe_strerror.h @@ -0,0 +1,44 @@ +// 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. + +#ifndef BASE_POSIX_SAFE_STRERROR_H_ +#define BASE_POSIX_SAFE_STRERROR_H_ + +#include <stddef.h> + +#include <string> + +#include "base/base_export.h" + +namespace base { + +// 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_ |