fork_and_run.cpp
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/*
* Copyright © 2012-2013 Canonical Ltd.
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Authored by: Thomas Voß <thomas.voss@canonical.com>
*/
#include <core/testing/fork_and_run.h>
#include <core/posix/exit.h>
#include <core/posix/fork.h>
#include <core/posix/wait.h>
core::testing::ForkAndRunResult core::testing::operator|(
core::testing::ForkAndRunResult lhs,
core::testing::ForkAndRunResult rhs)
{
return static_cast<core::testing::ForkAndRunResult>(
static_cast<unsigned int> (lhs) | static_cast<unsigned int>(rhs));
}
core::testing::ForkAndRunResult core::testing::operator&(
core::testing::ForkAndRunResult lhs,
core::testing::ForkAndRunResult rhs)
{
return static_cast<core::testing::ForkAndRunResult>(
static_cast<unsigned int> (lhs) & static_cast<unsigned int>(rhs));
}
core::testing::ForkAndRunResult core::testing::fork_and_run(
const std::function<core::posix::exit::Status()>& service,
const std::function<core::posix::exit::Status()>& client)
{
core::testing::ForkAndRunResult result = core::testing::ForkAndRunResult::empty;
auto service_process = core::posix::fork(service, core::posix::StandardStream::empty);
auto client_process = core::posix::fork(client, core::posix::StandardStream::empty);
auto client_result = client_process.wait_for(core::posix::wait::Flags::untraced);
switch (client_result.status)
{
case core::posix::wait::Result::Status::exited:
if (client_result.detail.if_exited.status == core::posix::exit::Status::failure)
result = result | core::testing::ForkAndRunResult::client_failed;
break;
default:
result = result | core::testing::ForkAndRunResult::client_failed;
break;
}
service_process.send_signal_or_throw(core::posix::Signal::sig_term);
auto service_result = service_process.wait_for(core::posix::wait::Flags::untraced);
switch (service_result.status)
{
case core::posix::wait::Result::Status::exited:
if (service_result.detail.if_exited.status == core::posix::exit::Status::failure)
result = result | core::testing::ForkAndRunResult::service_failed;
break;
default:
result = result | core::testing::ForkAndRunResult::service_failed;
break;
}
return result;
}
exit.h
fork.h
fork_and_run.h
core::posix::exit::Status
Status
The Status enum wrap's the posix exit status.
Definition: exit.h:34
core::posix::exit::Status::failure
@ failure
core::posix::wait::Flags::untraced
@ untraced
Also wait for state changes in untraced children.
core::posix::Signal::sig_term
@ sig_term
core::posix::fork
CORE_POSIX_DLL_PUBLIC ChildProcess fork(const std::function< posix::exit::Status()> &main, const StandardStream &flags)
fork forks a new process and executes the provided main function in the newly forked process.
Definition: fork.cpp:57
core::posix::StandardStream::empty
@ empty
core::testing::operator&
CORE_POSIX_DLL_PUBLIC ForkAndRunResult operator&(ForkAndRunResult lhs, ForkAndRunResult rhs)
Definition: fork_and_run.cpp:33
core::testing::operator|
CORE_POSIX_DLL_PUBLIC ForkAndRunResult operator|(ForkAndRunResult lhs, ForkAndRunResult rhs)
Definition: fork_and_run.cpp:25
core::testing::ForkAndRunResult
ForkAndRunResult
The ForkAndRunResult enum models the different failure modes of fork_and_run.
Definition: fork_and_run.h:35
core::testing::ForkAndRunResult::client_failed
@ client_failed
The client failed.
core::testing::ForkAndRunResult::empty
@ empty
Special value indicating no bit being set.
core::testing::ForkAndRunResult::service_failed
@ service_failed
The service failed.
core::testing::fork_and_run
CORE_POSIX_DLL_PUBLIC ForkAndRunResult fork_and_run(const std::function< core::posix::exit::Status()> &service, const std::function< core::posix::exit::Status()> &client)
Forks two processes for both the service and the client.
Definition: fork_and_run.cpp:41
core::posix::wait::Result::Status::exited
@ exited
The process exited normally.
wait.h