// Copyright 2016 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. // We used to use this code for Darwin, but according to issue #19314 // waitid returns if the process is stopped, even when using WEXITED. //go:build linux package os import ( "internal/syscall/unix" "runtime" "syscall" ) // blockUntilWaitable attempts to block until a call to p.Wait will // succeed immediately, and reports whether it has done so. // It does not actually call p.Wait. func (p *Process) blockUntilWaitable() (bool, error) { var info unix.SiginfoChild err := ignoringEINTR(func() error { return unix.Waitid(unix.P_PID, p.Pid, &info, syscall.WEXITED|syscall.WNOWAIT, nil) }) runtime.KeepAlive(p) if err != nil { // waitid has been available since Linux 2.6.9, but // reportedly is not available in Ubuntu on Windows. // See issue 16610. if err == syscall.ENOSYS { return false, nil } return false, NewSyscallError("waitid", err) } return true, nil }