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os: don't permit Process.Signal after a successful Wait

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R=dsymonds, rsc
CC=golang-dev
https://golang.org/cl/4689043
This commit is contained in:
Brad Fitzpatrick 2011-07-11 15:47:42 -07:00
parent d1f4e0d14e
commit d53385fd0c
4 changed files with 20 additions and 2 deletions
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6
src/pkg/os/exec_unix.go
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@ -38,6 +38,9 @@ func (p *Process) Wait(options int) (w *Waitmsg, err Error) {
if e != 0 {
return nil, NewSyscallError("wait", e)
}
if options&WSTOPPED == 0 {
p.done = true
}
w = new(Waitmsg)
w.Pid = pid1
w.WaitStatus = status
@ -47,6 +50,9 @@ func (p *Process) Wait(options int) (w *Waitmsg, err Error) {
// Signal sends a signal to the Process.
func (p *Process) Signal(sig Signal) Error {
if p.done {
return NewError("os: process already finished")
}
if e := syscall.Kill(p.Pid, int(sig.(UnixSignal))); e != 0 {
return Errno(e)
}