1 // Copyright 2010 The Kyua Authors. 2 // All rights reserved. 3 // 4 // Redistribution and use in source and binary forms, with or without 5 // modification, are permitted provided that the following conditions are 6 // met: 7 // 8 // * Redistributions of source code must retain the above copyright 9 // notice, this list of conditions and the following disclaimer. 10 // * Redistributions in binary form must reproduce the above copyright 11 // notice, this list of conditions and the following disclaimer in the 12 // documentation and/or other materials provided with the distribution. 13 // * Neither the name of Google Inc. nor the names of its contributors 14 // may be used to endorse or promote products derived from this software 15 // without specific prior written permission. 16 // 17 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 20 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 21 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 22 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 23 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 27 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 29 /// \file utils/process/system.hpp 30 /// Indirection to perform system calls. 31 /// 32 /// The indirections exposed in this file are provided to allow unit-testing of 33 /// particular system behaviors (e.g. failures). The caller of a routine in 34 /// this library is allowed, for testing purposes only, to explicitly replace 35 /// the pointers in this file with custom functions to inject a particular 36 /// behavior into the library code. 37 /// 38 /// Do not include this header from other header files. 39 /// 40 /// It may be nice to go one step further and completely abstract the library 41 /// functions in here to provide exception-based error reporting. 42 43 #if !defined(UTILS_PROCESS_SYSTEM_HPP) 44 #define UTILS_PROCESS_SYSTEM_HPP 45 46 extern "C" { 47 #include <unistd.h> 48 } 49 50 namespace utils { 51 namespace process { 52 namespace detail { 53 54 55 extern int (*syscall_dup2)(const int, const int); 56 extern pid_t (*syscall_fork)(void); 57 extern int (*syscall_open)(const char*, const int, ...); 58 extern int (*syscall_pipe)(int[2]); 59 extern pid_t (*syscall_waitpid)(const pid_t, int*, const int); 60 61 62 } // namespace detail 63 } // namespace process 64 } // namespace utils 65 66 #endif // !defined(UTILS_PROCESS_SYSTEM_HPP) 67