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// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build darwin dragonfly freebsd linux nacl netbsd openbsd solaris
package os
import (
"errors"
"runtime"
"syscall"
"time"
)
func (p *Process) wait() (ps *ProcessState, err error) {
if p.Pid == -1 {
return nil, syscall.EINVAL
}
var status syscall.WaitStatus
var rusage syscall.Rusage
pid1, e := syscall.Wait4(p.Pid, &status, 0, &rusage)
if e != nil {
return nil, NewSyscallError("wait", e)
}
if pid1 != 0 {
p.setDone()
}
ps = &ProcessState{
pid: pid1,
status: status,
rusage: &rusage,
}
return ps, nil
}
var errFinished = errors.New("os: process already finished")
func (p *Process) signal(sig Signal) error {
if p.Pid == -1 {
return errors.New("os: process already released")
}
if p.Pid == 0 {
return errors.New("os: process not initialized")
}
if p.done() {
return errFinished
}
s, ok := sig.(syscall.Signal)
if !ok {
return errors.New("os: unsupported signal type")
}
if e := syscall.Kill(p.Pid, s); e != nil {
if e == syscall.ESRCH {
return errFinished
}
return e
}
return nil
}
func (p *Process) release() error {
// NOOP for unix.
p.Pid = -1
// no need for a finalizer anymore
runtime.SetFinalizer(p, nil)
return nil
}
func findProcess(pid int) (p *Process, err error) {
// NOOP for unix.
return newProcess(pid, 0), nil
}
func (p *ProcessState) userTime() time.Duration {
return time.Duration(p.rusage.Utime.Nano()) * time.Nanosecond
}
func (p *ProcessState) systemTime() time.Duration {
return time.Duration(p.rusage.Stime.Nano()) * time.Nanosecond
}
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