/usr/include/boost/process/system.hpp is in libboost1.65-dev 1.65.1+dfsg-0ubuntu5.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 | // Copyright (c) 2006, 2007 Julio M. Merino Vidal
// Copyright (c) 2008 Ilya Sokolov, Boris Schaeling
// Copyright (c) 2009 Boris Schaeling
// Copyright (c) 2010 Felipe Tanus, Boris Schaeling
// Copyright (c) 2011, 2012 Jeff Flinn, Boris Schaeling
// Copyright (c) 2016 Klemens D. Morgenstern
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
/**
* \file boost/process/system.hpp
*
* Defines a system function.
*/
#ifndef BOOST_PROCESS_SYSTEM_HPP
#define BOOST_PROCESS_SYSTEM_HPP
#include <boost/process/detail/config.hpp>
#include <boost/process/detail/on_exit.hpp>
#include <boost/process/child.hpp>
#include <boost/process/detail/async_handler.hpp>
#include <boost/process/detail/execute_impl.hpp>
#include <type_traits>
#include <mutex>
#include <condition_variable>
#if defined(BOOST_POSIX_API)
#include <boost/process/posix.hpp>
#endif
namespace boost {
namespace process {
namespace detail
{
struct system_impl_success_check : handler
{
bool succeeded = false;
template<typename Exec>
void on_success(Exec &) { succeeded = true; }
};
template<typename IoService, typename ...Args>
inline int system_impl(
std::true_type, /*needs ios*/
std::true_type, /*has io_service*/
Args && ...args)
{
IoService & ios = ::boost::process::detail::get_io_service_var(args...);
system_impl_success_check check;
std::atomic_bool exited{false};
child c(std::forward<Args>(args)...,
check,
::boost::process::on_exit(
[&](int, const std::error_code&)
{
ios.post([&]{exited.store(true);});
}));
if (!c.valid() || !check.succeeded)
return -1;
while (!exited.load())
ios.poll();
return c.exit_code();
}
template<typename IoService, typename ...Args>
inline int system_impl(
std::true_type, /*needs ios */
std::false_type, /*has io_service*/
Args && ...args)
{
IoService ios;
child c(ios, std::forward<Args>(args)...);
if (!c.valid())
return -1;
ios.run();
return c.exit_code();
}
template<typename IoService, typename ...Args>
inline int system_impl(
std::false_type, /*needs ios*/
std::true_type, /*has io_service*/
Args && ...args)
{
child c(std::forward<Args>(args)...);
if (!c.valid())
return -1;
c.wait();
return c.exit_code();
}
template<typename IoService, typename ...Args>
inline int system_impl(
std::false_type, /*has async */
std::false_type, /*has io_service*/
Args && ...args)
{
child c(std::forward<Args>(args)...
#if defined(BOOST_POSIX_API)
,::boost::process::posix::sig.dfl()
#endif
);
if (!c.valid())
return -1;
c.wait();
return c.exit_code();
}
}
/** Launches a process and waits for its exit.
It works as std::system, though it allows
all the properties boost.process provides. It will execute the process and wait for it's exit; then return the exit_code.
\code{.cpp}
int ret = system("ls");
\endcode
\attention Using this function with synchronous pipes leads to many potential deadlocks.
When using this function with an asynchronous properties and NOT passing an io_service object,
the system function will create one and run it. When the io_service is passed to the function,
the system function will check if it is active, and call the io_service::run function if not.
*/
template<typename ...Args>
inline int system(Args && ...args)
{
typedef typename ::boost::process::detail::needs_io_service<Args...>::type
need_ios;
typedef typename ::boost::process::detail::has_io_service<Args...>::type
has_ios;
return ::boost::process::detail::system_impl<boost::asio::io_service>(
need_ios(), has_ios(),
std::forward<Args>(args)...);
}
}}
#endif
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