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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.

// For systems with the waitpid library call.

package syscall

//sys   waitpid(pid Pid_t, status *int, options int) (wpid Pid_t, err error)
//waitpid(pid Pid_t, status *int, options int) Pid_t

func Wait4(pid int, wstatus *WaitStatus, options int, rusage *Rusage) (wpid int, err error) {
        var status int
        r, err := waitpid(Pid_t(pid), &status, options)
        wpid = int(r)
        if wstatus != nil {
                *wstatus = WaitStatus(status)
        }
        return
}