106 lines
2.2 KiB
Go
106 lines
2.2 KiB
Go
// 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.
|
|
|
|
//go:build aix || darwin || dragonfly || freebsd || hurd || (js && wasm) || linux || 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
|
|
}
|
|
|
|
// If we can block until Wait4 will succeed immediately, do so.
|
|
ready, err := p.blockUntilWaitable()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if ready {
|
|
// Mark the process done now, before the call to Wait4,
|
|
// so that Process.signal will not send a signal.
|
|
p.setDone()
|
|
// Acquire a write lock on sigMu to wait for any
|
|
// active call to the signal method to complete.
|
|
p.sigMu.Lock()
|
|
p.sigMu.Unlock()
|
|
}
|
|
|
|
var (
|
|
status syscall.WaitStatus
|
|
rusage syscall.Rusage
|
|
pid1 int
|
|
e error
|
|
)
|
|
for {
|
|
pid1, e = syscall.Wait4(p.Pid, &status, 0, &rusage)
|
|
if e != syscall.EINTR {
|
|
break
|
|
}
|
|
}
|
|
if e != nil {
|
|
return nil, NewSyscallError("wait", e)
|
|
}
|
|
if pid1 != 0 {
|
|
p.setDone()
|
|
}
|
|
ps = &ProcessState{
|
|
pid: pid1,
|
|
status: status,
|
|
rusage: &rusage,
|
|
}
|
|
return ps, nil
|
|
}
|
|
|
|
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")
|
|
}
|
|
p.sigMu.RLock()
|
|
defer p.sigMu.RUnlock()
|
|
if p.done() {
|
|
return ErrProcessDone
|
|
}
|
|
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 ErrProcessDone
|
|
}
|
|
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
|
|
}
|