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// Copyright 2011 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.

// +build darwin freebsd linux netbsd openbsd

package time

import "syscall"

// for testing: whatever interrupts a sleep

func interrupt() {

        syscall.Kill(syscall.Getpid(), syscall.SIGCHLD)

}

// readFile reads and returns the content of the named file.

// It is a trivial implementation of ioutil.ReadFile, reimplemented

// here to avoid depending on io/ioutil or os.

func readFile(name string) ([]byte, error) {

        f, err := syscall.Open(name, syscall.O_RDONLY, 0)

        if err != nil {

                return nil, err

        }

        defer syscall.Close(f)

        var (

                buf [4096]byte

                ret []byte

                n   int

        )

        for {

                n, err = syscall.Read(f, buf[:])

                if n > 0 {

                        ret = append(ret, buf[:n]...)

                }

                if n == 0 || err != nil {

                        break

                }

        }

        return ret, err

}