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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.
package os
import (
"runtime"
"syscall"
)
func (p *Process) Wait(options int) (w *Waitmsg, err Error) {
s, e := syscall.WaitForSingleObject(syscall.Handle(p.handle), syscall.INFINITE)
switch s {
case syscall.WAIT_OBJECT_0:
break
case syscall.WAIT_FAILED:
return nil, NewSyscallError("WaitForSingleObject", e)
default:
return nil, NewError("os: unexpected result from WaitForSingleObject")
}
var ec uint32
e = syscall.GetExitCodeProcess(syscall.Handle(p.handle), &ec)
if e != 0 {
return nil, NewSyscallError("GetExitCodeProcess", e)
}
p.done = true
return &Waitmsg{p.Pid, syscall.WaitStatus{s, ec}, new(syscall.Rusage)}, nil
}
// Signal sends a signal to the Process.
func (p *Process) Signal(sig Signal) Error {
if p.done {
return NewError("os: process already finished")
}
switch sig.(UnixSignal) {
case SIGKILL:
e := syscall.TerminateProcess(syscall.Handle(p.handle), 1)
return NewSyscallError("TerminateProcess", e)
}
return Errno(syscall.EWINDOWS)
}
func (p *Process) Release() Error {
if p.handle == -1 {
return EINVAL
}
e := syscall.CloseHandle(syscall.Handle(p.handle))
if e != 0 {
return NewSyscallError("CloseHandle", e)
}
p.handle = -1
// no need for a finalizer anymore
runtime.SetFinalizer(p, nil)
return nil
}
func FindProcess(pid int) (p *Process, err Error) {
const da = syscall.STANDARD_RIGHTS_READ |
syscall.PROCESS_QUERY_INFORMATION | syscall.SYNCHRONIZE
h, e := syscall.OpenProcess(da, false, uint32(pid))
if e != 0 {
return nil, NewSyscallError("OpenProcess", e)
}
return newProcess(pid, int(h)), nil
}
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