// license that can be found in the LICENSE file.

package os

var (
	PollCopyFileRangeP  = &pollCopyFileRange
	PollSpliceFile      = &pollSplice
	GetPollFDAndNetwork = getPollFDAndNetwork
	CheckPidfdOnce      = checkPidfdOnce
)

const StatusDone = statusDone

func (p *Process) Status() processStatus {
	return processStatus(p.state.Load() & processStatusMask)

		return errors.New("os: process already released")
	}
	defer p.handleTransientRelease()

	return convertESRCH(unix.PidFDSendSignal(handle, s))
}

func pidfdWorks() bool {
	return checkPidfdOnce() == nil
}

var checkPidfdOnce = sync.OnceValue(checkPidfd)

// checkPidfd checks whether all required pidfd-related syscalls work.
// This consists of pidfd_open and pidfd_send_signal syscalls, and waitid

package os_test

import (
	"errors"
	"internal/testenv"
	"os"
	"syscall"
	"testing"
)

func TestFindProcessViaPidfd(t *testing.T) {
	testenv.MustHaveGoBuild(t)
	t.Parallel()

	if err := os.CheckPidfdOnce(); err != nil {
		// Non-pidfd code paths tested in exec_unix_test.go.
		t.Skipf("skipping: pidfd not available: %v", err)
	}

	p, err := os.StartProcess(testenv.GoToolPath(t), []string{"go"}, &os.ProcAttr{})