67 lines
2.7 KiB
C++
67 lines
2.7 KiB
C++
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// Copyright 2010 Google Inc.
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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// * Neither the name of Google Inc. nor the names of its contributors
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// may be used to endorse or promote products derived from this software
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// without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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/// \file utils/process/system.hpp
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/// Indirection to perform system calls.
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///
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/// The indirections exposed in this file are provided to allow unit-testing of
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/// particular system behaviors (e.g. failures). The caller of a routine in
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/// this library is allowed, for testing purposes only, to explicitly replace
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/// the pointers in this file with custom functions to inject a particular
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/// behavior into the library code.
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///
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/// Do not include this header from other header files.
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///
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/// It may be nice to go one step further and completely abstract the library
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/// functions in here to provide exception-based error reporting.
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#if !defined(UTILS_PROCESS_SYSTEM_HPP)
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#define UTILS_PROCESS_SYSTEM_HPP
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extern "C" {
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#include <unistd.h>
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}
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namespace utils {
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namespace process {
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namespace detail {
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extern int (*syscall_dup2)(const int, const int);
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extern pid_t (*syscall_fork)(void);
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extern int (*syscall_open)(const char*, const int, ...);
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extern int (*syscall_pipe)(int[2]);
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extern pid_t (*syscall_waitpid)(const pid_t, int*, const int);
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} // namespace detail
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} // namespace process
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} // namespace utils
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#endif // !defined(UTILS_PROCESS_SYSTEM_HPP)
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