System.hpp

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// The Reactive C++ Toolbox.
// Copyright (C) 2013-2019 Swirly Cloud Limited
// Copyright (C) 2021 Reactive Markets Limited
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
 
#ifndef TOOLBOX_SYS_SYSTEM_HPP
#define TOOLBOX_SYS_SYSTEM_HPP
 
#include <toolbox/sys/Error.hpp>
 
#include <unistd.h>
 
namespace toolbox {
namespace os {
 
inline void chdir(const char* path, std::error_code& ec) noexcept
{
    const auto ret = ::chdir(path);
    if (ret < 0) {
        ec = make_error(errno);
    }
}
 
inline void chdir(const char* path)
{
    const auto ret = ::chdir(path);
    if (ret < 0) {
        throw std::system_error{make_error(errno), "chdir"};
    }
}
 
inline pid_t fork(std::error_code& ec) noexcept
{
    const auto pid = ::fork();
    if (pid < 0) {
        ec = make_error(errno);
    }
    return pid;
}
 
inline pid_t fork()
{
    const auto pid = ::fork();
    if (pid < 0) {
        throw std::system_error{make_error(errno), "fork"};
    }
    return pid;
}
 
inline pid_t setsid(std::error_code& ec) noexcept
{
    const auto sid = ::setsid();
    if (sid < 0) {
        ec = make_error(errno);
    }
    return sid;
}
 
inline pid_t setsid()
{
    const auto sid = ::setsid();
    if (sid < 0) {
        throw std::system_error{make_error(errno), "setsid"};
    }
    return sid;
}
 
} // namespace os
} // namespace toolbox
 
#endif // TOOLBOX_SYS_SYSTEM_HPP